drivers/usb/serial/io

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This source file includes following definitions.
ti_vread_sync
ti_vsend_sync
send_cmd
purge_port
read_download_mem
read_ram
read_boot_mem
write_boot_mem
write_i2c_mem
tx_active
choose_config
read_rom
write_rom
get_descriptor_addr
valid_csum
check_i2c_image
get_manuf_info
build_i2c_fw_hdr
i2c_type_bootmode
bulk_xfer
download_code
config_boot_dev
ti_cpu_rev
check_fw_sanity
download_fw
do_download_mode
do_boot_mode
ti_do_config
restore_mcr
map_line_status
handle_new_msr
handle_new_lsr
edge_interrupt_callback
edge_bulk_in_callback
edge_tty_recv
edge_bulk_out_callback
edge_open
edge_close
edge_write
edge_send
edge_write_room
edge_chars_in_buffer
edge_tx_empty
edge_throttle
edge_unthrottle
stop_read
restart_read
change_port_settings
edge_set_termios
edge_tiocmset
edge_tiocmget
get_serial_info
edge_break
edge_heartbeat_schedule
edge_heartbeat_work
edge_calc_num_ports
edge_startup
edge_disconnect
edge_release
edge_port_probe
edge_port_remove
uart_mode_show
uart_mode_store
edge_create_sysfs_attrs
edge_remove_sysfs_attrs
edge_suspend
edge_resume
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Edgeport USB Serial Converter driver
   4  *
   5  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
   6  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   7  *
   8  * Supports the following devices:
   9  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
  10  *
  11  * For questions or problems with this driver, contact Inside Out
  12  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  13  * or Al Borchers <alborchers@steinerpoint.com>.
  14  */
  15 
  16 #include <linux/kernel.h>
  17 #include <linux/jiffies.h>
  18 #include <linux/errno.h>
  19 #include <linux/slab.h>
  20 #include <linux/tty.h>
  21 #include <linux/tty_driver.h>
  22 #include <linux/tty_flip.h>
  23 #include <linux/module.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/mutex.h>
  26 #include <linux/serial.h>
  27 #include <linux/swab.h>
  28 #include <linux/kfifo.h>
  29 #include <linux/ioctl.h>
  30 #include <linux/firmware.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/usb.h>
  33 #include <linux/usb/serial.h>
  34 
  35 #include "io_16654.h"
  36 #include "io_usbvend.h"
  37 #include "io_ti.h"
  38 
  39 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  40 #define DRIVER_DESC "Edgeport USB Serial Driver"
  41 
  42 #define EPROM_PAGE_SIZE         64
  43 
  44 
  45 /* different hardware types */
  46 #define HARDWARE_TYPE_930       0
  47 #define HARDWARE_TYPE_TIUMP     1
  48 
  49 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
  50 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
  51 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
  52 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
  53 #define TI_MODE_TRANSITIONING   3   /*
  54                                      * Currently in boot mode but
  55                                      * transitioning to download mode
  56                                      */
  57 
  58 /* read urb state */
  59 #define EDGE_READ_URB_RUNNING   0
  60 #define EDGE_READ_URB_STOPPING  1
  61 #define EDGE_READ_URB_STOPPED   2
  62 
  63 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  64 
  65 
  66 /* Product information read from the Edgeport */
  67 struct product_info {
  68         int     TiMode;                 /* Current TI Mode  */
  69         __u8    hardware_type;          /* Type of hardware */
  70 } __attribute__((packed));
  71 
  72 /*
  73  * Edgeport firmware header
  74  *
  75  * "build_number" has been set to 0 in all three of the images I have
  76  * seen, and Digi Tech Support suggests that it is safe to ignore it.
  77  *
  78  * "length" is the number of bytes of actual data following the header.
  79  *
  80  * "checksum" is the low order byte resulting from adding the values of
  81  * all the data bytes.
  82  */
  83 struct edgeport_fw_hdr {
  84         u8 major_version;
  85         u8 minor_version;
  86         __le16 build_number;
  87         __le16 length;
  88         u8 checksum;
  89 } __packed;
  90 
  91 struct edgeport_port {
  92         __u16 uart_base;
  93         __u16 dma_address;
  94         __u8 shadow_msr;
  95         __u8 shadow_mcr;
  96         __u8 shadow_lsr;
  97         __u8 lsr_mask;
  98         __u32 ump_read_timeout;         /*
  99                                          * Number of milliseconds the UMP will
 100                                          * wait without data before completing
 101                                          * a read short
 102                                          */
 103         int baud_rate;
 104         int close_pending;
 105         int lsr_event;
 106 
 107         struct edgeport_serial  *edge_serial;
 108         struct usb_serial_port  *port;
 109         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 110         spinlock_t ep_lock;
 111         int ep_read_urb_state;
 112         int ep_write_urb_in_use;
 113 };
 114 
 115 struct edgeport_serial {
 116         struct product_info product_info;
 117         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 118         u8 TiReadI2C;                   /*
 119                                          * Set to TRUE if we have read the
 120                                          * I2c in Boot Mode
 121                                          */
 122         struct mutex es_lock;
 123         int num_ports_open;
 124         struct usb_serial *serial;
 125         struct delayed_work heartbeat_work;
 126         int fw_version;
 127         bool use_heartbeat;
 128 };
 129 
 130 
 131 /* Devices that this driver supports */
 132 static const struct usb_device_id edgeport_1port_id_table[] = {
 133         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 134         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 135         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 136         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 149         { }
 150 };
 151 
 152 static const struct usb_device_id edgeport_2port_id_table[] = {
 153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 155         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 156         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 165         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 171         { }
 172 };
 173 
 174 /* Devices that this driver supports */
 175 static const struct usb_device_id id_table_combined[] = {
 176         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 209         { }
 210 };
 211 
 212 MODULE_DEVICE_TABLE(usb, id_table_combined);
 213 
 214 static int closing_wait = EDGE_CLOSING_WAIT;
 215 static bool ignore_cpu_rev;
 216 static int default_uart_mode;           /* RS232 */
 217 
 218 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 219                 int length);
 220 
 221 static void stop_read(struct edgeport_port *edge_port);
 222 static int restart_read(struct edgeport_port *edge_port);
 223 
 224 static void edge_set_termios(struct tty_struct *tty,
 225                 struct usb_serial_port *port, struct ktermios *old_termios);
 226 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
 227 
 228 static int do_download_mode(struct edgeport_serial *serial,
 229                 const struct firmware *fw);
 230 static int do_boot_mode(struct edgeport_serial *serial,
 231                 const struct firmware *fw);
 232 
 233 /* sysfs attributes */
 234 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 235 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 236 
 237 /*
 238  * Some release of Edgeport firmware "down3.bin" after version 4.80
 239  * introduced code to automatically disconnect idle devices on some
 240  * Edgeport models after periods of inactivity, typically ~60 seconds.
 241  * This occurs without regard to whether ports on the device are open
 242  * or not.  Digi International Tech Support suggested:
 243  *
 244  * 1.  Adding driver "heartbeat" code to reset the firmware timer by
 245  *     requesting a descriptor record every 15 seconds, which should be
 246  *     effective with newer firmware versions that require it, and benign
 247  *     with older versions that do not. In practice 40 seconds seems often
 248  *     enough.
 249  * 2.  The heartbeat code is currently required only on Edgeport/416 models.
 250  */
 251 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
 252 #define FW_HEARTBEAT_SECS 40
 253 
 254 /* Timeouts in msecs: firmware downloads take longer */
 255 #define TI_VSEND_TIMEOUT_DEFAULT 1000
 256 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
 257 
 258 static int ti_vread_sync(struct usb_device *dev, __u8 request,
 259                                 __u16 value, __u16 index, u8 *data, int size)
 260 {
 261         int status;
 262 
 263         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 264                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 265                         value, index, data, size, 1000);
 266         if (status < 0)
 267                 return status;
 268         if (status != size) {
 269                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
 270                         __func__, size, status);
 271                 return -ECOMM;
 272         }
 273         return 0;
 274 }
 275 
 276 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
 277                 u16 index, u8 *data, int size, int timeout)
 278 {
 279         int status;
 280 
 281         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 282                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 283                         value, index, data, size, timeout);
 284         if (status < 0)
 285                 return status;
 286         if (status != size) {
 287                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
 288                         __func__, size, status);
 289                 return -ECOMM;
 290         }
 291         return 0;
 292 }
 293 
 294 static int send_cmd(struct usb_device *dev, __u8 command,
 295                                 __u8 moduleid, __u16 value, u8 *data,
 296                                 int size)
 297 {
 298         return ti_vsend_sync(dev, command, value, moduleid, data, size,
 299                         TI_VSEND_TIMEOUT_DEFAULT);
 300 }
 301 
 302 /* clear tx/rx buffers and fifo in TI UMP */
 303 static int purge_port(struct usb_serial_port *port, __u16 mask)
 304 {
 305         int port_number = port->port_number;
 306 
 307         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
 308 
 309         return send_cmd(port->serial->dev,
 310                                         UMPC_PURGE_PORT,
 311                                         (__u8)(UMPM_UART1_PORT + port_number),
 312                                         mask,
 313                                         NULL,
 314                                         0);
 315 }
 316 
 317 /**
 318  * read_download_mem - Read edgeport memory from TI chip
 319  * @dev: usb device pointer
 320  * @start_address: Device CPU address at which to read
 321  * @length: Length of above data
 322  * @address_type: Can read both XDATA and I2C
 323  * @buffer: pointer to input data buffer
 324  */
 325 static int read_download_mem(struct usb_device *dev, int start_address,
 326                                 int length, __u8 address_type, __u8 *buffer)
 327 {
 328         int status = 0;
 329         __u8 read_length;
 330         u16 be_start_address;
 331 
 332         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
 333 
 334         /*
 335          * Read in blocks of 64 bytes
 336          * (TI firmware can't handle more than 64 byte reads)
 337          */
 338         while (length) {
 339                 if (length > 64)
 340                         read_length = 64;
 341                 else
 342                         read_length = (__u8)length;
 343 
 344                 if (read_length > 1) {
 345                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
 346                 }
 347                 /*
 348                  * NOTE: Must use swab as wIndex is sent in little-endian
 349                  *       byte order regardless of host byte order.
 350                  */
 351                 be_start_address = swab16((u16)start_address);
 352                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 353                                         (__u16)address_type,
 354                                         be_start_address,
 355                                         buffer, read_length);
 356 
 357                 if (status) {
 358                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
 359                         return status;
 360                 }
 361 
 362                 if (read_length > 1)
 363                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
 364 
 365                 /* Update pointers/length */
 366                 start_address += read_length;
 367                 buffer += read_length;
 368                 length -= read_length;
 369         }
 370 
 371         return status;
 372 }
 373 
 374 static int read_ram(struct usb_device *dev, int start_address,
 375                                                 int length, __u8 *buffer)
 376 {
 377         return read_download_mem(dev, start_address, length,
 378                                         DTK_ADDR_SPACE_XDATA, buffer);
 379 }
 380 
 381 /* Read edgeport memory to a given block */
 382 static int read_boot_mem(struct edgeport_serial *serial,
 383                                 int start_address, int length, __u8 *buffer)
 384 {
 385         int status = 0;
 386         int i;
 387 
 388         for (i = 0; i < length; i++) {
 389                 status = ti_vread_sync(serial->serial->dev,
 390                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 391                                 (__u16)(start_address+i), &buffer[i], 0x01);
 392                 if (status) {
 393                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
 394                         return status;
 395                 }
 396         }
 397 
 398         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
 399                 __func__, start_address, length);
 400         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 401 
 402         serial->TiReadI2C = 1;
 403 
 404         return status;
 405 }
 406 
 407 /* Write given block to TI EPROM memory */
 408 static int write_boot_mem(struct edgeport_serial *serial,
 409                                 int start_address, int length, __u8 *buffer)
 410 {
 411         int status = 0;
 412         int i;
 413         u8 *temp;
 414 
 415         /* Must do a read before write */
 416         if (!serial->TiReadI2C) {
 417                 temp = kmalloc(1, GFP_KERNEL);
 418                 if (!temp)
 419                         return -ENOMEM;
 420 
 421                 status = read_boot_mem(serial, 0, 1, temp);
 422                 kfree(temp);
 423                 if (status)
 424                         return status;
 425         }
 426 
 427         for (i = 0; i < length; ++i) {
 428                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 429                                 buffer[i], (u16)(i + start_address), NULL,
 430                                 0, TI_VSEND_TIMEOUT_DEFAULT);
 431                 if (status)
 432                         return status;
 433         }
 434 
 435         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
 436         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 437 
 438         return status;
 439 }
 440 
 441 /* Write edgeport I2C memory to TI chip */
 442 static int write_i2c_mem(struct edgeport_serial *serial,
 443                 int start_address, int length, __u8 address_type, __u8 *buffer)
 444 {
 445         struct device *dev = &serial->serial->dev->dev;
 446         int status = 0;
 447         int write_length;
 448         u16 be_start_address;
 449 
 450         /* We can only send a maximum of 1 aligned byte page at a time */
 451 
 452         /* calculate the number of bytes left in the first page */
 453         write_length = EPROM_PAGE_SIZE -
 454                                 (start_address & (EPROM_PAGE_SIZE - 1));
 455 
 456         if (write_length > length)
 457                 write_length = length;
 458 
 459         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
 460                 __func__, start_address, write_length);
 461         usb_serial_debug_data(dev, __func__, write_length, buffer);
 462 
 463         /*
 464          * Write first page.
 465          *
 466          * NOTE: Must use swab as wIndex is sent in little-endian byte order
 467          *       regardless of host byte order.
 468          */
 469         be_start_address = swab16((u16)start_address);
 470         status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 471                                 (u16)address_type, be_start_address,
 472                                 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
 473         if (status) {
 474                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
 475                 return status;
 476         }
 477 
 478         length          -= write_length;
 479         start_address   += write_length;
 480         buffer          += write_length;
 481 
 482         /*
 483          * We should be aligned now -- can write max page size bytes at a
 484          * time.
 485          */
 486         while (length) {
 487                 if (length > EPROM_PAGE_SIZE)
 488                         write_length = EPROM_PAGE_SIZE;
 489                 else
 490                         write_length = length;
 491 
 492                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
 493                         __func__, start_address, write_length);
 494                 usb_serial_debug_data(dev, __func__, write_length, buffer);
 495 
 496                 /*
 497                  * Write next page.
 498                  *
 499                  * NOTE: Must use swab as wIndex is sent in little-endian byte
 500                  *       order regardless of host byte order.
 501                  */
 502                 be_start_address = swab16((u16)start_address);
 503                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 504                                 (u16)address_type, be_start_address, buffer,
 505                                 write_length, TI_VSEND_TIMEOUT_DEFAULT);
 506                 if (status) {
 507                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
 508                         return status;
 509                 }
 510 
 511                 length          -= write_length;
 512                 start_address   += write_length;
 513                 buffer          += write_length;
 514         }
 515         return status;
 516 }
 517 
 518 /*
 519  * Examine the UMP DMA registers and LSR
 520  *
 521  * Check the MSBit of the X and Y DMA byte count registers.
 522  * A zero in this bit indicates that the TX DMA buffers are empty
 523  * then check the TX Empty bit in the UART.
 524  */
 525 static int tx_active(struct edgeport_port *port)
 526 {
 527         int status;
 528         struct out_endpoint_desc_block *oedb;
 529         __u8 *lsr;
 530         int bytes_left = 0;
 531 
 532         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 533         if (!oedb)
 534                 return -ENOMEM;
 535 
 536         /*
 537          * Sigh, that's right, just one byte, as not all platforms can
 538          * do DMA from stack
 539          */
 540         lsr = kmalloc(1, GFP_KERNEL);
 541         if (!lsr) {
 542                 kfree(oedb);
 543                 return -ENOMEM;
 544         }
 545         /* Read the DMA Count Registers */
 546         status = read_ram(port->port->serial->dev, port->dma_address,
 547                                                 sizeof(*oedb), (void *)oedb);
 548         if (status)
 549                 goto exit_is_tx_active;
 550 
 551         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
 552 
 553         /* and the LSR */
 554         status = read_ram(port->port->serial->dev,
 555                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 556 
 557         if (status)
 558                 goto exit_is_tx_active;
 559         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
 560 
 561         /* If either buffer has data or we are transmitting then return TRUE */
 562         if ((oedb->XByteCount & 0x80) != 0)
 563                 bytes_left += 64;
 564 
 565         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 566                 bytes_left += 1;
 567 
 568         /* We return Not Active if we get any kind of error */
 569 exit_is_tx_active:
 570         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
 571 
 572         kfree(lsr);
 573         kfree(oedb);
 574         return bytes_left;
 575 }
 576 
 577 static int choose_config(struct usb_device *dev)
 578 {
 579         /*
 580          * There may be multiple configurations on this device, in which case
 581          * we would need to read and parse all of them to find out which one
 582          * we want. However, we just support one config at this point,
 583          * configuration # 1, which is Config Descriptor 0.
 584          */
 585 
 586         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
 587                 __func__, dev->config->desc.bNumInterfaces);
 588         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
 589                 __func__, dev->config->desc.bMaxPower * 2);
 590 
 591         if (dev->config->desc.bNumInterfaces != 1) {
 592                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
 593                 return -ENODEV;
 594         }
 595 
 596         return 0;
 597 }
 598 
 599 static int read_rom(struct edgeport_serial *serial,
 600                                 int start_address, int length, __u8 *buffer)
 601 {
 602         int status;
 603 
 604         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 605                 status = read_download_mem(serial->serial->dev,
 606                                                start_address,
 607                                                length,
 608                                                serial->TI_I2C_Type,
 609                                                buffer);
 610         } else {
 611                 status = read_boot_mem(serial, start_address, length,
 612                                                                 buffer);
 613         }
 614         return status;
 615 }
 616 
 617 static int write_rom(struct edgeport_serial *serial, int start_address,
 618                                                 int length, __u8 *buffer)
 619 {
 620         if (serial->product_info.TiMode == TI_MODE_BOOT)
 621                 return write_boot_mem(serial, start_address, length,
 622                                                                 buffer);
 623 
 624         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 625                 return write_i2c_mem(serial, start_address, length,
 626                                                 serial->TI_I2C_Type, buffer);
 627         return -EINVAL;
 628 }
 629 
 630 /* Read a descriptor header from I2C based on type */
 631 static int get_descriptor_addr(struct edgeport_serial *serial,
 632                                 int desc_type, struct ti_i2c_desc *rom_desc)
 633 {
 634         int start_address;
 635         int status;
 636 
 637         /* Search for requested descriptor in I2C */
 638         start_address = 2;
 639         do {
 640                 status = read_rom(serial,
 641                                    start_address,
 642                                    sizeof(struct ti_i2c_desc),
 643                                    (__u8 *)rom_desc);
 644                 if (status)
 645                         return 0;
 646 
 647                 if (rom_desc->Type == desc_type)
 648                         return start_address;
 649 
 650                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 651                                                 le16_to_cpu(rom_desc->Size);
 652 
 653         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 654 
 655         return 0;
 656 }
 657 
 658 /* Validate descriptor checksum */
 659 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 660 {
 661         __u16 i;
 662         __u8 cs = 0;
 663 
 664         for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
 665                 cs = (__u8)(cs + buffer[i]);
 666 
 667         if (cs != rom_desc->CheckSum) {
 668                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 669                 return -EINVAL;
 670         }
 671         return 0;
 672 }
 673 
 674 /* Make sure that the I2C image is good */
 675 static int check_i2c_image(struct edgeport_serial *serial)
 676 {
 677         struct device *dev = &serial->serial->dev->dev;
 678         int status = 0;
 679         struct ti_i2c_desc *rom_desc;
 680         int start_address = 2;
 681         __u8 *buffer;
 682         __u16 ttype;
 683 
 684         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 685         if (!rom_desc)
 686                 return -ENOMEM;
 687 
 688         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 689         if (!buffer) {
 690                 kfree(rom_desc);
 691                 return -ENOMEM;
 692         }
 693 
 694         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 695         status = read_rom(serial, 0, 1, buffer);
 696         if (status)
 697                 goto out;
 698 
 699         if (*buffer != UMP5152 && *buffer != UMP3410) {
 700                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 701                 status = -ENODEV;
 702                 goto out;
 703         }
 704 
 705         do {
 706                 /* Validate the I2C */
 707                 status = read_rom(serial,
 708                                 start_address,
 709                                 sizeof(struct ti_i2c_desc),
 710                                 (__u8 *)rom_desc);
 711                 if (status)
 712                         break;
 713 
 714                 if ((start_address + sizeof(struct ti_i2c_desc) +
 715                         le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
 716                         status = -ENODEV;
 717                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
 718                         break;
 719                 }
 720 
 721                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
 722 
 723                 /* Skip type 2 record */
 724                 ttype = rom_desc->Type & 0x0f;
 725                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 726                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 727                         /* Read the descriptor data */
 728                         status = read_rom(serial, start_address +
 729                                                 sizeof(struct ti_i2c_desc),
 730                                                 le16_to_cpu(rom_desc->Size),
 731                                                 buffer);
 732                         if (status)
 733                                 break;
 734 
 735                         status = valid_csum(rom_desc, buffer);
 736                         if (status)
 737                                 break;
 738                 }
 739                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 740                                                 le16_to_cpu(rom_desc->Size);
 741 
 742         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 743                                 (start_address < TI_MAX_I2C_SIZE));
 744 
 745         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 746                                 (start_address > TI_MAX_I2C_SIZE))
 747                 status = -ENODEV;
 748 
 749 out:
 750         kfree(buffer);
 751         kfree(rom_desc);
 752         return status;
 753 }
 754 
 755 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
 756 {
 757         int status;
 758         int start_address;
 759         struct ti_i2c_desc *rom_desc;
 760         struct edge_ti_manuf_descriptor *desc;
 761         struct device *dev = &serial->serial->dev->dev;
 762 
 763         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 764         if (!rom_desc)
 765                 return -ENOMEM;
 766 
 767         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 768                                                                 rom_desc);
 769 
 770         if (!start_address) {
 771                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
 772                 status = -ENODEV;
 773                 goto exit;
 774         }
 775 
 776         /* Read the descriptor data */
 777         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 778                                         le16_to_cpu(rom_desc->Size), buffer);
 779         if (status)
 780                 goto exit;
 781 
 782         status = valid_csum(rom_desc, buffer);
 783 
 784         desc = (struct edge_ti_manuf_descriptor *)buffer;
 785         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
 786         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
 787         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
 788         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
 789         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
 790         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
 791 
 792 exit:
 793         kfree(rom_desc);
 794         return status;
 795 }
 796 
 797 /* Build firmware header used for firmware update */
 798 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
 799 {
 800         __u8 *buffer;
 801         int buffer_size;
 802         int i;
 803         __u8 cs = 0;
 804         struct ti_i2c_desc *i2c_header;
 805         struct ti_i2c_image_header *img_header;
 806         struct ti_i2c_firmware_rec *firmware_rec;
 807         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 808 
 809         /*
 810          * In order to update the I2C firmware we must change the type 2 record
 811          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 812          * Then while in boot mode, the driver will download the latest
 813          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 814          * device comes back up in download mode the driver will cause the new
 815          * firmware to be copied from the UMP Ram to I2C and the firmware will
 816          * update the record type from 0xf2 to 0x02.
 817          */
 818 
 819         /*
 820          * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
 821          * Record)
 822          */
 823         buffer_size = (((1024 * 16) - 512 ) +
 824                         sizeof(struct ti_i2c_firmware_rec));
 825 
 826         buffer = kmalloc(buffer_size, GFP_KERNEL);
 827         if (!buffer)
 828                 return -ENOMEM;
 829 
 830         /* Set entire image of 0xffs */
 831         memset(buffer, 0xff, buffer_size);
 832 
 833         /* Copy version number into firmware record */
 834         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 835 
 836         firmware_rec->Ver_Major = fw_hdr->major_version;
 837         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 838 
 839         /* Pointer to fw_down memory image */
 840         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 841 
 842         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 843                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 844                 le16_to_cpu(img_header->Length));
 845 
 846         for (i=0; i < buffer_size; i++) {
 847                 cs = (__u8)(cs + buffer[i]);
 848         }
 849 
 850         kfree(buffer);
 851 
 852         /* Build new header */
 853         i2c_header =  (struct ti_i2c_desc *)header;
 854         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 855 
 856         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 857         i2c_header->Size        = cpu_to_le16(buffer_size);
 858         i2c_header->CheckSum    = cs;
 859         firmware_rec->Ver_Major = fw_hdr->major_version;
 860         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 861 
 862         return 0;
 863 }
 864 
 865 /* Try to figure out what type of I2c we have */
 866 static int i2c_type_bootmode(struct edgeport_serial *serial)
 867 {
 868         struct device *dev = &serial->serial->dev->dev;
 869         int status;
 870         u8 *data;
 871 
 872         data = kmalloc(1, GFP_KERNEL);
 873         if (!data)
 874                 return -ENOMEM;
 875 
 876         /* Try to read type 2 */
 877         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 878                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
 879         if (status)
 880                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
 881         else
 882                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 883         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 884                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
 885                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 886                 goto out;
 887         }
 888 
 889         /* Try to read type 3 */
 890         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 891                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
 892         if (status)
 893                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
 894         else
 895                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 896         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 897                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
 898                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 899                 goto out;
 900         }
 901 
 902         dev_dbg(dev, "%s - Unknown\n", __func__);
 903         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 904         status = -ENODEV;
 905 out:
 906         kfree(data);
 907         return status;
 908 }
 909 
 910 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 911                                                 int length, int *num_sent)
 912 {
 913         int status;
 914 
 915         status = usb_bulk_msg(serial->dev,
 916                         usb_sndbulkpipe(serial->dev,
 917                                 serial->port[0]->bulk_out_endpointAddress),
 918                         buffer, length, num_sent, 1000);
 919         return status;
 920 }
 921 
 922 /* Download given firmware image to the device (IN BOOT MODE) */
 923 static int download_code(struct edgeport_serial *serial, __u8 *image,
 924                                                         int image_length)
 925 {
 926         int status = 0;
 927         int pos;
 928         int transfer;
 929         int done;
 930 
 931         /* Transfer firmware image */
 932         for (pos = 0; pos < image_length; ) {
 933                 /* Read the next buffer from file */
 934                 transfer = image_length - pos;
 935                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 936                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 937 
 938                 /* Transfer data */
 939                 status = bulk_xfer(serial->serial, &image[pos],
 940                                                         transfer, &done);
 941                 if (status)
 942                         break;
 943                 /* Advance buffer pointer */
 944                 pos += done;
 945         }
 946 
 947         return status;
 948 }
 949 
 950 /* FIXME!!! */
 951 static int config_boot_dev(struct usb_device *dev)
 952 {
 953         return 0;
 954 }
 955 
 956 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
 957 {
 958         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
 959 }
 960 
 961 static int check_fw_sanity(struct edgeport_serial *serial,
 962                 const struct firmware *fw)
 963 {
 964         u16 length_total;
 965         u8 checksum = 0;
 966         int pos;
 967         struct device *dev = &serial->serial->interface->dev;
 968         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 969 
 970         if (fw->size < sizeof(struct edgeport_fw_hdr)) {
 971                 dev_err(dev, "incomplete fw header\n");
 972                 return -EINVAL;
 973         }
 974 
 975         length_total = le16_to_cpu(fw_hdr->length) +
 976                         sizeof(struct edgeport_fw_hdr);
 977 
 978         if (fw->size != length_total) {
 979                 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
 980                                 length_total, fw->size);
 981                 return -EINVAL;
 982         }
 983 
 984         for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
 985                 checksum += fw->data[pos];
 986 
 987         if (checksum != fw_hdr->checksum) {
 988                 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
 989                                 fw_hdr->checksum, checksum);
 990                 return -EINVAL;
 991         }
 992 
 993         return 0;
 994 }
 995 
 996 /*
 997  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
 998  *
 999  * This routine downloads the main operating code into the TI5052, using the
1000  * boot code already burned into E2PROM or ROM.
1001  */
1002 static int download_fw(struct edgeport_serial *serial)
1003 {
1004         struct device *dev = &serial->serial->interface->dev;
1005         int status = 0;
1006         struct usb_interface_descriptor *interface;
1007         const struct firmware *fw;
1008         const char *fw_name = "edgeport/down3.bin";
1009         struct edgeport_fw_hdr *fw_hdr;
1010 
1011         status = request_firmware(&fw, fw_name, dev);
1012         if (status) {
1013                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1014                                 fw_name, status);
1015                 return status;
1016         }
1017 
1018         if (check_fw_sanity(serial, fw)) {
1019                 status = -EINVAL;
1020                 goto out;
1021         }
1022 
1023         fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1024 
1025         /* If on-board version is newer, "fw_version" will be updated later. */
1026         serial->fw_version = (fw_hdr->major_version << 8) +
1027                         fw_hdr->minor_version;
1028 
1029         /*
1030          * This routine is entered by both the BOOT mode and the Download mode
1031          * We can determine which code is running by the reading the config
1032          * descriptor and if we have only one bulk pipe it is in boot mode
1033          */
1034         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1035 
1036         /* Default to type 2 i2c */
1037         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1038 
1039         status = choose_config(serial->serial->dev);
1040         if (status)
1041                 goto out;
1042 
1043         interface = &serial->serial->interface->cur_altsetting->desc;
1044         if (!interface) {
1045                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1046                 status = -ENODEV;
1047                 goto out;
1048         }
1049 
1050         /*
1051          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1052          * if we have more than one endpoint we are definitely in download
1053          * mode
1054          */
1055         if (interface->bNumEndpoints > 1) {
1056                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1057                 status = do_download_mode(serial, fw);
1058         } else {
1059                 /* Otherwise we will remain in configuring mode */
1060                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1061                 status = do_boot_mode(serial, fw);
1062         }
1063 
1064 out:
1065         release_firmware(fw);
1066         return status;
1067 }
1068 
1069 static int do_download_mode(struct edgeport_serial *serial,
1070                 const struct firmware *fw)
1071 {
1072         struct device *dev = &serial->serial->interface->dev;
1073         int status = 0;
1074         int start_address;
1075         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1076         int download_cur_ver;
1077         int download_new_ver;
1078         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1079         struct ti_i2c_desc *rom_desc;
1080 
1081         dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1082 
1083         status = check_i2c_image(serial);
1084         if (status) {
1085                 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1086                 return status;
1087         }
1088 
1089         /*
1090          * Validate Hardware version number
1091          * Read Manufacturing Descriptor from TI Based Edgeport
1092          */
1093         ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1094         if (!ti_manuf_desc)
1095                 return -ENOMEM;
1096 
1097         status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1098         if (status) {
1099                 kfree(ti_manuf_desc);
1100                 return status;
1101         }
1102 
1103         /* Check version number of ION descriptor */
1104         if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1105                 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1106                         __func__, ti_cpu_rev(ti_manuf_desc));
1107                 kfree(ti_manuf_desc);
1108                 return -EINVAL;
1109         }
1110 
1111         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1112         if (!rom_desc) {
1113                 kfree(ti_manuf_desc);
1114                 return -ENOMEM;
1115         }
1116 
1117         /* Search for type 2 record (firmware record) */
1118         start_address = get_descriptor_addr(serial,
1119                         I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1120         if (start_address != 0) {
1121                 struct ti_i2c_firmware_rec *firmware_version;
1122                 u8 *record;
1123 
1124                 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1125                                 __func__);
1126 
1127                 firmware_version = kmalloc(sizeof(*firmware_version),
1128                                                         GFP_KERNEL);
1129                 if (!firmware_version) {
1130                         kfree(rom_desc);
1131                         kfree(ti_manuf_desc);
1132                         return -ENOMEM;
1133                 }
1134 
1135                 /*
1136                  * Validate version number
1137                  * Read the descriptor data
1138                  */
1139                 status = read_rom(serial, start_address +
1140                                 sizeof(struct ti_i2c_desc),
1141                                 sizeof(struct ti_i2c_firmware_rec),
1142                                 (__u8 *)firmware_version);
1143                 if (status) {
1144                         kfree(firmware_version);
1145                         kfree(rom_desc);
1146                         kfree(ti_manuf_desc);
1147                         return status;
1148                 }
1149 
1150                 /*
1151                  * Check version number of download with current
1152                  * version in I2c
1153                  */
1154                 download_cur_ver = (firmware_version->Ver_Major << 8) +
1155                                    (firmware_version->Ver_Minor);
1156                 download_new_ver = (fw_hdr->major_version << 8) +
1157                                    (fw_hdr->minor_version);
1158 
1159                 dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1160                         __func__, firmware_version->Ver_Major,
1161                         firmware_version->Ver_Minor,
1162                         fw_hdr->major_version, fw_hdr->minor_version);
1163 
1164                 /*
1165                  * Check if we have an old version in the I2C and
1166                  * update if necessary
1167                  */
1168                 if (download_cur_ver < download_new_ver) {
1169                         dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1170                                 __func__,
1171                                 firmware_version->Ver_Major,
1172                                 firmware_version->Ver_Minor,
1173                                 fw_hdr->major_version,
1174                                 fw_hdr->minor_version);
1175 
1176                         record = kmalloc(1, GFP_KERNEL);
1177                         if (!record) {
1178                                 kfree(firmware_version);
1179                                 kfree(rom_desc);
1180                                 kfree(ti_manuf_desc);
1181                                 return -ENOMEM;
1182                         }
1183                         /*
1184                          * In order to update the I2C firmware we must
1185                          * change the type 2 record to type 0xF2. This
1186                          * will force the UMP to come up in Boot Mode.
1187                          * Then while in boot mode, the driver will
1188                          * download the latest firmware (padded to
1189                          * 15.5k) into the UMP ram. Finally when the
1190                          * device comes back up in download mode the
1191                          * driver will cause the new firmware to be
1192                          * copied from the UMP Ram to I2C and the
1193                          * firmware will update the record type from
1194                          * 0xf2 to 0x02.
1195                          */
1196                         *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1197 
1198                         /*
1199                          * Change the I2C Firmware record type to
1200                          * 0xf2 to trigger an update
1201                          */
1202                         status = write_rom(serial, start_address,
1203                                         sizeof(*record), record);
1204                         if (status) {
1205                                 kfree(record);
1206                                 kfree(firmware_version);
1207                                 kfree(rom_desc);
1208                                 kfree(ti_manuf_desc);
1209                                 return status;
1210                         }
1211 
1212                         /*
1213                          * verify the write -- must do this in order
1214                          * for write to complete before we do the
1215                          * hardware reset
1216                          */
1217                         status = read_rom(serial,
1218                                                 start_address,
1219                                                 sizeof(*record),
1220                                                 record);
1221                         if (status) {
1222                                 kfree(record);
1223                                 kfree(firmware_version);
1224                                 kfree(rom_desc);
1225                                 kfree(ti_manuf_desc);
1226                                 return status;
1227                         }
1228 
1229                         if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1230                                 dev_err(dev, "%s - error resetting device\n",
1231                                                 __func__);
1232                                 kfree(record);
1233                                 kfree(firmware_version);
1234                                 kfree(rom_desc);
1235                                 kfree(ti_manuf_desc);
1236                                 return -ENODEV;
1237                         }
1238 
1239                         dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1240 
1241                         /* Reset UMP -- Back to BOOT MODE */
1242                         status = ti_vsend_sync(serial->serial->dev,
1243                                         UMPC_HARDWARE_RESET,
1244                                         0, 0, NULL, 0,
1245                                         TI_VSEND_TIMEOUT_DEFAULT);
1246 
1247                         dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1248                                         __func__, status);
1249 
1250                         /* return an error on purpose. */
1251                         kfree(record);
1252                         kfree(firmware_version);
1253                         kfree(rom_desc);
1254                         kfree(ti_manuf_desc);
1255                         return -ENODEV;
1256                 }
1257                 /* Same or newer fw version is already loaded */
1258                 serial->fw_version = download_cur_ver;
1259                 kfree(firmware_version);
1260         }
1261         /* Search for type 0xF2 record (firmware blank record) */
1262         else {
1263                 start_address = get_descriptor_addr(serial,
1264                                 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1265                 if (start_address != 0) {
1266 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1267                                 sizeof(struct ti_i2c_firmware_rec))
1268                         __u8 *header;
1269                         __u8 *vheader;
1270 
1271                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1272                         if (!header) {
1273                                 kfree(rom_desc);
1274                                 kfree(ti_manuf_desc);
1275                                 return -ENOMEM;
1276                         }
1277 
1278                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1279                         if (!vheader) {
1280                                 kfree(header);
1281                                 kfree(rom_desc);
1282                                 kfree(ti_manuf_desc);
1283                                 return -ENOMEM;
1284                         }
1285 
1286                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1287                                         __func__);
1288 
1289                         /*
1290                          * In order to update the I2C firmware we must change
1291                          * the type 2 record to type 0xF2. This will force the
1292                          * UMP to come up in Boot Mode.  Then while in boot
1293                          * mode, the driver will download the latest firmware
1294                          * (padded to 15.5k) into the UMP ram. Finally when the
1295                          * device comes back up in download mode the driver
1296                          * will cause the new firmware to be copied from the
1297                          * UMP Ram to I2C and the firmware will update the
1298                          * record type from 0xf2 to 0x02.
1299                          */
1300                         status = build_i2c_fw_hdr(header, fw);
1301                         if (status) {
1302                                 kfree(vheader);
1303                                 kfree(header);
1304                                 kfree(rom_desc);
1305                                 kfree(ti_manuf_desc);
1306                                 return -EINVAL;
1307                         }
1308 
1309                         /*
1310                          * Update I2C with type 0xf2 record with correct
1311                          * size and checksum
1312                          */
1313                         status = write_rom(serial,
1314                                                 start_address,
1315                                                 HEADER_SIZE,
1316                                                 header);
1317                         if (status) {
1318                                 kfree(vheader);
1319                                 kfree(header);
1320                                 kfree(rom_desc);
1321                                 kfree(ti_manuf_desc);
1322                                 return -EINVAL;
1323                         }
1324 
1325                         /*
1326                          * verify the write -- must do this in order for
1327                          * write to complete before we do the hardware reset
1328                          */
1329                         status = read_rom(serial, start_address,
1330                                                         HEADER_SIZE, vheader);
1331 
1332                         if (status) {
1333                                 dev_dbg(dev, "%s - can't read header back\n",
1334                                                 __func__);
1335                                 kfree(vheader);
1336                                 kfree(header);
1337                                 kfree(rom_desc);
1338                                 kfree(ti_manuf_desc);
1339                                 return status;
1340                         }
1341                         if (memcmp(vheader, header, HEADER_SIZE)) {
1342                                 dev_dbg(dev, "%s - write download record failed\n",
1343                                                 __func__);
1344                                 kfree(vheader);
1345                                 kfree(header);
1346                                 kfree(rom_desc);
1347                                 kfree(ti_manuf_desc);
1348                                 return -EINVAL;
1349                         }
1350 
1351                         kfree(vheader);
1352                         kfree(header);
1353 
1354                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1355 
1356                         /* Tell firmware to copy download image into I2C */
1357                         status = ti_vsend_sync(serial->serial->dev,
1358                                         UMPC_COPY_DNLD_TO_I2C,
1359                                         0, 0, NULL, 0,
1360                                         TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1361 
1362                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1363                                         status);
1364                         if (status) {
1365                                 dev_err(dev,
1366                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1367                                         __func__);
1368                                 kfree(rom_desc);
1369                                 kfree(ti_manuf_desc);
1370                                 return status;
1371                         }
1372                 }
1373         }
1374 
1375         /* The device is running the download code */
1376         kfree(rom_desc);
1377         kfree(ti_manuf_desc);
1378         return 0;
1379 }
1380 
1381 static int do_boot_mode(struct edgeport_serial *serial,
1382                 const struct firmware *fw)
1383 {
1384         struct device *dev = &serial->serial->interface->dev;
1385         int status = 0;
1386         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1387         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1388 
1389         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1390 
1391         /* Configure the TI device so we can use the BULK pipes for download */
1392         status = config_boot_dev(serial->serial->dev);
1393         if (status)
1394                 return status;
1395 
1396         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1397                                                         != USB_VENDOR_ID_ION) {
1398                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1399                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1400                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1401                 goto stayinbootmode;
1402         }
1403 
1404         /*
1405          * We have an ION device (I2c Must be programmed)
1406          * Determine I2C image type
1407          */
1408         if (i2c_type_bootmode(serial))
1409                 goto stayinbootmode;
1410 
1411         /* Check for ION Vendor ID and that the I2C is valid */
1412         if (!check_i2c_image(serial)) {
1413                 struct ti_i2c_image_header *header;
1414                 int i;
1415                 __u8 cs = 0;
1416                 __u8 *buffer;
1417                 int buffer_size;
1418 
1419                 /*
1420                  * Validate Hardware version number
1421                  * Read Manufacturing Descriptor from TI Based Edgeport
1422                  */
1423                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1424                 if (!ti_manuf_desc)
1425                         return -ENOMEM;
1426 
1427                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1428                 if (status) {
1429                         kfree(ti_manuf_desc);
1430                         goto stayinbootmode;
1431                 }
1432 
1433                 /* Check for version 2 */
1434                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1435                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1436                                 __func__, ti_cpu_rev(ti_manuf_desc));
1437                         kfree(ti_manuf_desc);
1438                         goto stayinbootmode;
1439                 }
1440 
1441                 kfree(ti_manuf_desc);
1442 
1443                 /*
1444                  * In order to update the I2C firmware we must change the type
1445                  * 2 record to type 0xF2. This will force the UMP to come up
1446                  * in Boot Mode.  Then while in boot mode, the driver will
1447                  * download the latest firmware (padded to 15.5k) into the
1448                  * UMP ram. Finally when the device comes back up in download
1449                  * mode the driver will cause the new firmware to be copied
1450                  * from the UMP Ram to I2C and the firmware will update the
1451                  * record type from 0xf2 to 0x02.
1452                  *
1453                  * Do we really have to copy the whole firmware image,
1454                  * or could we do this in place!
1455                  */
1456 
1457                 /* Allocate a 15.5k buffer + 3 byte header */
1458                 buffer_size = (((1024 * 16) - 512) +
1459                                         sizeof(struct ti_i2c_image_header));
1460                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1461                 if (!buffer)
1462                         return -ENOMEM;
1463 
1464                 /* Initialize the buffer to 0xff (pad the buffer) */
1465                 memset(buffer, 0xff, buffer_size);
1466                 memcpy(buffer, &fw->data[4], fw->size - 4);
1467 
1468                 for (i = sizeof(struct ti_i2c_image_header);
1469                                 i < buffer_size; i++) {
1470                         cs = (__u8)(cs + buffer[i]);
1471                 }
1472 
1473                 header = (struct ti_i2c_image_header *)buffer;
1474 
1475                 /* update length and checksum after padding */
1476                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1477                                         sizeof(struct ti_i2c_image_header)));
1478                 header->CheckSum = cs;
1479 
1480                 /* Download the operational code  */
1481                 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1482                                 __func__,
1483                                 fw_hdr->major_version, fw_hdr->minor_version);
1484                 status = download_code(serial, buffer, buffer_size);
1485 
1486                 kfree(buffer);
1487 
1488                 if (status) {
1489                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1490                         return status;
1491                 }
1492 
1493                 /* Device will reboot */
1494                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1495 
1496                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1497 
1498                 return 1;
1499         }
1500 
1501 stayinbootmode:
1502         /* Eprom is invalid or blank stay in boot mode */
1503         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1504         serial->product_info.TiMode = TI_MODE_BOOT;
1505 
1506         return 1;
1507 }
1508 
1509 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1510 {
1511         int port_number = port->port->port_number;
1512 
1513         on = !!on;      /* 1 or 0 not bitmask */
1514         return send_cmd(port->port->serial->dev,
1515                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1516                         on, NULL, 0);
1517 }
1518 
1519 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1520 {
1521         int status = 0;
1522 
1523         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1524 
1525         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1526         if (status)
1527                 return status;
1528         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1529         if (status)
1530                 return status;
1531         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1532 }
1533 
1534 /* Convert TI LSR to standard UART flags */
1535 static __u8 map_line_status(__u8 ti_lsr)
1536 {
1537         __u8 lsr = 0;
1538 
1539 #define MAP_FLAG(flagUmp, flagUart)    \
1540         if (ti_lsr & flagUmp) \
1541                 lsr |= flagUart;
1542 
1543         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1544         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1545         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1546         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1547         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1548         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1549 
1550 #undef MAP_FLAG
1551 
1552         return lsr;
1553 }
1554 
1555 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1556 {
1557         struct async_icount *icount;
1558         struct tty_struct *tty;
1559 
1560         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1561 
1562         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1563                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1564                 icount = &edge_port->port->icount;
1565 
1566                 /* update input line counters */
1567                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1568                         icount->cts++;
1569                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1570                         icount->dsr++;
1571                 if (msr & EDGEPORT_MSR_DELTA_CD)
1572                         icount->dcd++;
1573                 if (msr & EDGEPORT_MSR_DELTA_RI)
1574                         icount->rng++;
1575                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1576         }
1577 
1578         /* Save the new modem status */
1579         edge_port->shadow_msr = msr & 0xf0;
1580 
1581         tty = tty_port_tty_get(&edge_port->port->port);
1582         /* handle CTS flow control */
1583         if (tty && C_CRTSCTS(tty)) {
1584                 if (msr & EDGEPORT_MSR_CTS)
1585                         tty_wakeup(tty);
1586         }
1587         tty_kref_put(tty);
1588 }
1589 
1590 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1591                                                         __u8 lsr, __u8 data)
1592 {
1593         struct async_icount *icount;
1594         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1595                                                 LSR_FRM_ERR | LSR_BREAK));
1596 
1597         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1598 
1599         edge_port->shadow_lsr = lsr;
1600 
1601         if (new_lsr & LSR_BREAK)
1602                 /*
1603                  * Parity and Framing errors only count if they
1604                  * occur exclusive of a break being received.
1605                  */
1606                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1607 
1608         /* Place LSR data byte into Rx buffer */
1609         if (lsr_data)
1610                 edge_tty_recv(edge_port->port, &data, 1);
1611 
1612         /* update input line counters */
1613         icount = &edge_port->port->icount;
1614         if (new_lsr & LSR_BREAK)
1615                 icount->brk++;
1616         if (new_lsr & LSR_OVER_ERR)
1617                 icount->overrun++;
1618         if (new_lsr & LSR_PAR_ERR)
1619                 icount->parity++;
1620         if (new_lsr & LSR_FRM_ERR)
1621                 icount->frame++;
1622 }
1623 
1624 static void edge_interrupt_callback(struct urb *urb)
1625 {
1626         struct edgeport_serial *edge_serial = urb->context;
1627         struct usb_serial_port *port;
1628         struct edgeport_port *edge_port;
1629         struct device *dev;
1630         unsigned char *data = urb->transfer_buffer;
1631         int length = urb->actual_length;
1632         int port_number;
1633         int function;
1634         int retval;
1635         __u8 lsr;
1636         __u8 msr;
1637         int status = urb->status;
1638 
1639         switch (status) {
1640         case 0:
1641                 /* success */
1642                 break;
1643         case -ECONNRESET:
1644         case -ENOENT:
1645         case -ESHUTDOWN:
1646                 /* this urb is terminated, clean up */
1647                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1648                     __func__, status);
1649                 return;
1650         default:
1651                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1652                         "%d\n", __func__, status);
1653                 goto exit;
1654         }
1655 
1656         if (!length) {
1657                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1658                 goto exit;
1659         }
1660 
1661         dev = &edge_serial->serial->dev->dev;
1662         usb_serial_debug_data(dev, __func__, length, data);
1663 
1664         if (length != 2) {
1665                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1666                 goto exit;
1667         }
1668 
1669         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1670         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1671         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1672                 port_number, function, data[1]);
1673 
1674         if (port_number >= edge_serial->serial->num_ports) {
1675                 dev_err(dev, "bad port number %d\n", port_number);
1676                 goto exit;
1677         }
1678 
1679         port = edge_serial->serial->port[port_number];
1680         edge_port = usb_get_serial_port_data(port);
1681         if (!edge_port) {
1682                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1683                 return;
1684         }
1685         switch (function) {
1686         case TIUMP_INTERRUPT_CODE_LSR:
1687                 lsr = map_line_status(data[1]);
1688                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1689                         /*
1690                          * Save the LSR event for bulk read completion routine
1691                          */
1692                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1693                                 __func__, port_number, lsr);
1694                         edge_port->lsr_event = 1;
1695                         edge_port->lsr_mask = lsr;
1696                 } else {
1697                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1698                                 __func__, port_number, lsr);
1699                         handle_new_lsr(edge_port, 0, lsr, 0);
1700                 }
1701                 break;
1702 
1703         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1704                 /* Copy MSR from UMP */
1705                 msr = data[1];
1706                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1707                         __func__, port_number, msr);
1708                 handle_new_msr(edge_port, msr);
1709                 break;
1710 
1711         default:
1712                 dev_err(&urb->dev->dev,
1713                         "%s - Unknown Interrupt code from UMP %x\n",
1714                         __func__, data[1]);
1715                 break;
1716 
1717         }
1718 
1719 exit:
1720         retval = usb_submit_urb(urb, GFP_ATOMIC);
1721         if (retval)
1722                 dev_err(&urb->dev->dev,
1723                         "%s - usb_submit_urb failed with result %d\n",
1724                          __func__, retval);
1725 }
1726 
1727 static void edge_bulk_in_callback(struct urb *urb)
1728 {
1729         struct edgeport_port *edge_port = urb->context;
1730         struct device *dev = &edge_port->port->dev;
1731         unsigned char *data = urb->transfer_buffer;
1732         unsigned long flags;
1733         int retval = 0;
1734         int port_number;
1735         int status = urb->status;
1736 
1737         switch (status) {
1738         case 0:
1739                 /* success */
1740                 break;
1741         case -ECONNRESET:
1742         case -ENOENT:
1743         case -ESHUTDOWN:
1744                 /* this urb is terminated, clean up */
1745                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1746                 return;
1747         default:
1748                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1749         }
1750 
1751         if (status == -EPIPE)
1752                 goto exit;
1753 
1754         if (status) {
1755                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1756                 return;
1757         }
1758 
1759         port_number = edge_port->port->port_number;
1760 
1761         if (urb->actual_length > 0 && edge_port->lsr_event) {
1762                 edge_port->lsr_event = 0;
1763                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1764                         __func__, port_number, edge_port->lsr_mask, *data);
1765                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1766                 /* Adjust buffer length/pointer */
1767                 --urb->actual_length;
1768                 ++data;
1769         }
1770 
1771         if (urb->actual_length) {
1772                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1773                 if (edge_port->close_pending)
1774                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1775                                                                 __func__);
1776                 else
1777                         edge_tty_recv(edge_port->port, data,
1778                                         urb->actual_length);
1779                 edge_port->port->icount.rx += urb->actual_length;
1780         }
1781 
1782 exit:
1783         /* continue read unless stopped */
1784         spin_lock_irqsave(&edge_port->ep_lock, flags);
1785         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1786                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1787         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1788                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1789 
1790         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1791         if (retval)
1792                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1793 }
1794 
1795 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1796                 int length)
1797 {
1798         int queued;
1799 
1800         queued = tty_insert_flip_string(&port->port, data, length);
1801         if (queued < length)
1802                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1803                         __func__, length - queued);
1804         tty_flip_buffer_push(&port->port);
1805 }
1806 
1807 static void edge_bulk_out_callback(struct urb *urb)
1808 {
1809         struct usb_serial_port *port = urb->context;
1810         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1811         int status = urb->status;
1812         struct tty_struct *tty;
1813 
1814         edge_port->ep_write_urb_in_use = 0;
1815 
1816         switch (status) {
1817         case 0:
1818                 /* success */
1819                 break;
1820         case -ECONNRESET:
1821         case -ENOENT:
1822         case -ESHUTDOWN:
1823                 /* this urb is terminated, clean up */
1824                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1825                     __func__, status);
1826                 return;
1827         default:
1828                 dev_err_console(port, "%s - nonzero write bulk status "
1829                         "received: %d\n", __func__, status);
1830         }
1831 
1832         /* send any buffered data */
1833         tty = tty_port_tty_get(&port->port);
1834         edge_send(port, tty);
1835         tty_kref_put(tty);
1836 }
1837 
1838 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1839 {
1840         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1841         struct edgeport_serial *edge_serial;
1842         struct usb_device *dev;
1843         struct urb *urb;
1844         int port_number;
1845         int status;
1846         u16 open_settings;
1847         u8 transaction_timeout;
1848 
1849         if (edge_port == NULL)
1850                 return -ENODEV;
1851 
1852         port_number = port->port_number;
1853 
1854         dev = port->serial->dev;
1855 
1856         /* turn off loopback */
1857         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1858         if (status) {
1859                 dev_err(&port->dev,
1860                                 "%s - cannot send clear loopback command, %d\n",
1861                         __func__, status);
1862                 return status;
1863         }
1864 
1865         /* set up the port settings */
1866         if (tty)
1867                 edge_set_termios(tty, port, &tty->termios);
1868 
1869         /* open up the port */
1870 
1871         /* milliseconds to timeout for DMA transfer */
1872         transaction_timeout = 2;
1873 
1874         edge_port->ump_read_timeout =
1875                                 max(20, ((transaction_timeout * 3) / 2));
1876 
1877         /* milliseconds to timeout for DMA transfer */
1878         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1879                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1880                              (transaction_timeout << 2));
1881 
1882         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1883 
1884         /* Tell TI to open and start the port */
1885         status = send_cmd(dev, UMPC_OPEN_PORT,
1886                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1887         if (status) {
1888                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1889                                                         __func__, status);
1890                 return status;
1891         }
1892 
1893         /* Start the DMA? */
1894         status = send_cmd(dev, UMPC_START_PORT,
1895                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1896         if (status) {
1897                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1898                                                         __func__, status);
1899                 return status;
1900         }
1901 
1902         /* Clear TX and RX buffers in UMP */
1903         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1904         if (status) {
1905                 dev_err(&port->dev,
1906                         "%s - cannot send clear buffers command, %d\n",
1907                         __func__, status);
1908                 return status;
1909         }
1910 
1911         /* Read Initial MSR */
1912         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1913                                 (__u16)(UMPM_UART1_PORT + port_number),
1914                                 &edge_port->shadow_msr, 1);
1915         if (status) {
1916                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1917                                                         __func__, status);
1918                 return status;
1919         }
1920 
1921         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1922 
1923         /* Set Initial MCR */
1924         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1925         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1926 
1927         edge_serial = edge_port->edge_serial;
1928         if (mutex_lock_interruptible(&edge_serial->es_lock))
1929                 return -ERESTARTSYS;
1930         if (edge_serial->num_ports_open == 0) {
1931                 /* we are the first port to open, post the interrupt urb */
1932                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1933                 urb->context = edge_serial;
1934                 status = usb_submit_urb(urb, GFP_KERNEL);
1935                 if (status) {
1936                         dev_err(&port->dev,
1937                                 "%s - usb_submit_urb failed with value %d\n",
1938                                         __func__, status);
1939                         goto release_es_lock;
1940                 }
1941         }
1942 
1943         /*
1944          * reset the data toggle on the bulk endpoints to work around bug in
1945          * host controllers where things get out of sync some times
1946          */
1947         usb_clear_halt(dev, port->write_urb->pipe);
1948         usb_clear_halt(dev, port->read_urb->pipe);
1949 
1950         /* start up our bulk read urb */
1951         urb = port->read_urb;
1952         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1953         urb->context = edge_port;
1954         status = usb_submit_urb(urb, GFP_KERNEL);
1955         if (status) {
1956                 dev_err(&port->dev,
1957                         "%s - read bulk usb_submit_urb failed with value %d\n",
1958                                 __func__, status);
1959                 goto unlink_int_urb;
1960         }
1961 
1962         ++edge_serial->num_ports_open;
1963 
1964         goto release_es_lock;
1965 
1966 unlink_int_urb:
1967         if (edge_port->edge_serial->num_ports_open == 0)
1968                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1969 release_es_lock:
1970         mutex_unlock(&edge_serial->es_lock);
1971         return status;
1972 }
1973 
1974 static void edge_close(struct usb_serial_port *port)
1975 {
1976         struct edgeport_serial *edge_serial;
1977         struct edgeport_port *edge_port;
1978         struct usb_serial *serial = port->serial;
1979         unsigned long flags;
1980         int port_number;
1981 
1982         edge_serial = usb_get_serial_data(port->serial);
1983         edge_port = usb_get_serial_port_data(port);
1984         if (edge_serial == NULL || edge_port == NULL)
1985                 return;
1986 
1987         /*
1988          * The bulkreadcompletion routine will check
1989          * this flag and dump add read data
1990          */
1991         edge_port->close_pending = 1;
1992 
1993         usb_kill_urb(port->read_urb);
1994         usb_kill_urb(port->write_urb);
1995         edge_port->ep_write_urb_in_use = 0;
1996         spin_lock_irqsave(&edge_port->ep_lock, flags);
1997         kfifo_reset_out(&port->write_fifo);
1998         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1999 
2000         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
2001         port_number = port->port_number;
2002         send_cmd(serial->dev, UMPC_CLOSE_PORT,
2003                      (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
2004 
2005         mutex_lock(&edge_serial->es_lock);
2006         --edge_port->edge_serial->num_ports_open;
2007         if (edge_port->edge_serial->num_ports_open <= 0) {
2008                 /* last port is now closed, let's shut down our interrupt urb */
2009                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2010                 edge_port->edge_serial->num_ports_open = 0;
2011         }
2012         mutex_unlock(&edge_serial->es_lock);
2013         edge_port->close_pending = 0;
2014 }
2015 
2016 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2017                                 const unsigned char *data, int count)
2018 {
2019         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2020 
2021         if (count == 0) {
2022                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2023                 return 0;
2024         }
2025 
2026         if (edge_port == NULL)
2027                 return -ENODEV;
2028         if (edge_port->close_pending == 1)
2029                 return -ENODEV;
2030 
2031         count = kfifo_in_locked(&port->write_fifo, data, count,
2032                                                         &edge_port->ep_lock);
2033         edge_send(port, tty);
2034 
2035         return count;
2036 }
2037 
2038 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2039 {
2040         int count, result;
2041         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2042         unsigned long flags;
2043 
2044         spin_lock_irqsave(&edge_port->ep_lock, flags);
2045 
2046         if (edge_port->ep_write_urb_in_use) {
2047                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2048                 return;
2049         }
2050 
2051         count = kfifo_out(&port->write_fifo,
2052                                 port->write_urb->transfer_buffer,
2053                                 port->bulk_out_size);
2054 
2055         if (count == 0) {
2056                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2057                 return;
2058         }
2059 
2060         edge_port->ep_write_urb_in_use = 1;
2061 
2062         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2063 
2064         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2065 
2066         /* set up our urb */
2067         port->write_urb->transfer_buffer_length = count;
2068 
2069         /* send the data out the bulk port */
2070         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2071         if (result) {
2072                 dev_err_console(port,
2073                         "%s - failed submitting write urb, error %d\n",
2074                                 __func__, result);
2075                 edge_port->ep_write_urb_in_use = 0;
2076                 /* TODO: reschedule edge_send */
2077         } else
2078                 edge_port->port->icount.tx += count;
2079 
2080         /*
2081          * wakeup any process waiting for writes to complete
2082          * there is now more room in the buffer for new writes
2083          */
2084         if (tty)
2085                 tty_wakeup(tty);
2086 }
2087 
2088 static int edge_write_room(struct tty_struct *tty)
2089 {
2090         struct usb_serial_port *port = tty->driver_data;
2091         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2092         int room = 0;
2093         unsigned long flags;
2094 
2095         if (edge_port == NULL)
2096                 return 0;
2097         if (edge_port->close_pending == 1)
2098                 return 0;
2099 
2100         spin_lock_irqsave(&edge_port->ep_lock, flags);
2101         room = kfifo_avail(&port->write_fifo);
2102         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2103 
2104         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2105         return room;
2106 }
2107 
2108 static int edge_chars_in_buffer(struct tty_struct *tty)
2109 {
2110         struct usb_serial_port *port = tty->driver_data;
2111         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2112         int chars = 0;
2113         unsigned long flags;
2114         if (edge_port == NULL)
2115                 return 0;
2116 
2117         spin_lock_irqsave(&edge_port->ep_lock, flags);
2118         chars = kfifo_len(&port->write_fifo);
2119         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2120 
2121         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2122         return chars;
2123 }
2124 
2125 static bool edge_tx_empty(struct usb_serial_port *port)
2126 {
2127         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2128         int ret;
2129 
2130         ret = tx_active(edge_port);
2131         if (ret > 0)
2132                 return false;
2133 
2134         return true;
2135 }
2136 
2137 static void edge_throttle(struct tty_struct *tty)
2138 {
2139         struct usb_serial_port *port = tty->driver_data;
2140         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2141         int status;
2142 
2143         if (edge_port == NULL)
2144                 return;
2145 
2146         /* if we are implementing XON/XOFF, send the stop character */
2147         if (I_IXOFF(tty)) {
2148                 unsigned char stop_char = STOP_CHAR(tty);
2149                 status = edge_write(tty, port, &stop_char, 1);
2150                 if (status <= 0) {
2151                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2152                 }
2153         }
2154 
2155         /*
2156          * if we are implementing RTS/CTS, stop reads
2157          * and the Edgeport will clear the RTS line
2158          */
2159         if (C_CRTSCTS(tty))
2160                 stop_read(edge_port);
2161 
2162 }
2163 
2164 static void edge_unthrottle(struct tty_struct *tty)
2165 {
2166         struct usb_serial_port *port = tty->driver_data;
2167         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2168         int status;
2169 
2170         if (edge_port == NULL)
2171                 return;
2172 
2173         /* if we are implementing XON/XOFF, send the start character */
2174         if (I_IXOFF(tty)) {
2175                 unsigned char start_char = START_CHAR(tty);
2176                 status = edge_write(tty, port, &start_char, 1);
2177                 if (status <= 0) {
2178                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2179                 }
2180         }
2181         /*
2182          * if we are implementing RTS/CTS, restart reads
2183          * are the Edgeport will assert the RTS line
2184          */
2185         if (C_CRTSCTS(tty)) {
2186                 status = restart_read(edge_port);
2187                 if (status)
2188                         dev_err(&port->dev,
2189                                 "%s - read bulk usb_submit_urb failed: %d\n",
2190                                                         __func__, status);
2191         }
2192 
2193 }
2194 
2195 static void stop_read(struct edgeport_port *edge_port)
2196 {
2197         unsigned long flags;
2198 
2199         spin_lock_irqsave(&edge_port->ep_lock, flags);
2200 
2201         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2202                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2203         edge_port->shadow_mcr &= ~MCR_RTS;
2204 
2205         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2206 }
2207 
2208 static int restart_read(struct edgeport_port *edge_port)
2209 {
2210         struct urb *urb;
2211         int status = 0;
2212         unsigned long flags;
2213 
2214         spin_lock_irqsave(&edge_port->ep_lock, flags);
2215 
2216         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2217                 urb = edge_port->port->read_urb;
2218                 status = usb_submit_urb(urb, GFP_ATOMIC);
2219         }
2220         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2221         edge_port->shadow_mcr |= MCR_RTS;
2222 
2223         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2224 
2225         return status;
2226 }
2227 
2228 static void change_port_settings(struct tty_struct *tty,
2229                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2230 {
2231         struct device *dev = &edge_port->port->dev;
2232         struct ump_uart_config *config;
2233         int baud;
2234         unsigned cflag;
2235         int status;
2236         int port_number = edge_port->port->port_number;
2237 
2238         config = kmalloc (sizeof (*config), GFP_KERNEL);
2239         if (!config) {
2240                 tty->termios = *old_termios;
2241                 return;
2242         }
2243 
2244         cflag = tty->termios.c_cflag;
2245 
2246         config->wFlags = 0;
2247 
2248         /* These flags must be set */
2249         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2250         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2251         config->bUartMode = (__u8)(edge_port->bUartMode);
2252 
2253         switch (cflag & CSIZE) {
2254         case CS5:
2255                     config->bDataBits = UMP_UART_CHAR5BITS;
2256                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2257                     break;
2258         case CS6:
2259                     config->bDataBits = UMP_UART_CHAR6BITS;
2260                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2261                     break;
2262         case CS7:
2263                     config->bDataBits = UMP_UART_CHAR7BITS;
2264                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2265                     break;
2266         default:
2267         case CS8:
2268                     config->bDataBits = UMP_UART_CHAR8BITS;
2269                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2270                             break;
2271         }
2272 
2273         if (cflag & PARENB) {
2274                 if (cflag & PARODD) {
2275                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2276                         config->bParity = UMP_UART_ODDPARITY;
2277                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2278                 } else {
2279                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2280                         config->bParity = UMP_UART_EVENPARITY;
2281                         dev_dbg(dev, "%s - parity = even\n", __func__);
2282                 }
2283         } else {
2284                 config->bParity = UMP_UART_NOPARITY;
2285                 dev_dbg(dev, "%s - parity = none\n", __func__);
2286         }
2287 
2288         if (cflag & CSTOPB) {
2289                 config->bStopBits = UMP_UART_STOPBIT2;
2290                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2291         } else {
2292                 config->bStopBits = UMP_UART_STOPBIT1;
2293                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2294         }
2295 
2296         /* figure out the flow control settings */
2297         if (cflag & CRTSCTS) {
2298                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2299                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2300                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2301         } else {
2302                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2303                 restart_read(edge_port);
2304         }
2305 
2306         /*
2307          * if we are implementing XON/XOFF, set the start and stop
2308          * character in the device
2309          */
2310         config->cXon  = START_CHAR(tty);
2311         config->cXoff = STOP_CHAR(tty);
2312 
2313         /* if we are implementing INBOUND XON/XOFF */
2314         if (I_IXOFF(tty)) {
2315                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2316                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2317                         __func__, config->cXon, config->cXoff);
2318         } else
2319                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2320 
2321         /* if we are implementing OUTBOUND XON/XOFF */
2322         if (I_IXON(tty)) {
2323                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2324                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2325                         __func__, config->cXon, config->cXoff);
2326         } else
2327                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2328 
2329         tty->termios.c_cflag &= ~CMSPAR;
2330 
2331         /* Round the baud rate */
2332         baud = tty_get_baud_rate(tty);
2333         if (!baud) {
2334                 /* pick a default, any default... */
2335                 baud = 9600;
2336         } else {
2337                 /* Avoid a zero divisor. */
2338                 baud = min(baud, 461550);
2339                 tty_encode_baud_rate(tty, baud, baud);
2340         }
2341 
2342         edge_port->baud_rate = baud;
2343         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2344 
2345         /* FIXME: Recompute actual baud from divisor here */
2346 
2347         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2348 
2349         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2350         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2351         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2352         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2353         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2354         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2355         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2356         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2357 
2358         /* move the word values into big endian mode */
2359         cpu_to_be16s(&config->wFlags);
2360         cpu_to_be16s(&config->wBaudRate);
2361 
2362         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2363                                 (__u8)(UMPM_UART1_PORT + port_number),
2364                                 0, (__u8 *)config, sizeof(*config));
2365         if (status)
2366                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2367                         __func__, status);
2368         kfree(config);
2369 }
2370 
2371 static void edge_set_termios(struct tty_struct *tty,
2372                 struct usb_serial_port *port, struct ktermios *old_termios)
2373 {
2374         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2375 
2376         if (edge_port == NULL)
2377                 return;
2378         /* change the port settings to the new ones specified */
2379         change_port_settings(tty, edge_port, old_termios);
2380 }
2381 
2382 static int edge_tiocmset(struct tty_struct *tty,
2383                                         unsigned int set, unsigned int clear)
2384 {
2385         struct usb_serial_port *port = tty->driver_data;
2386         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2387         unsigned int mcr;
2388         unsigned long flags;
2389 
2390         spin_lock_irqsave(&edge_port->ep_lock, flags);
2391         mcr = edge_port->shadow_mcr;
2392         if (set & TIOCM_RTS)
2393                 mcr |= MCR_RTS;
2394         if (set & TIOCM_DTR)
2395                 mcr |= MCR_DTR;
2396         if (set & TIOCM_LOOP)
2397                 mcr |= MCR_LOOPBACK;
2398 
2399         if (clear & TIOCM_RTS)
2400                 mcr &= ~MCR_RTS;
2401         if (clear & TIOCM_DTR)
2402                 mcr &= ~MCR_DTR;
2403         if (clear & TIOCM_LOOP)
2404                 mcr &= ~MCR_LOOPBACK;
2405 
2406         edge_port->shadow_mcr = mcr;
2407         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2408 
2409         restore_mcr(edge_port, mcr);
2410         return 0;
2411 }
2412 
2413 static int edge_tiocmget(struct tty_struct *tty)
2414 {
2415         struct usb_serial_port *port = tty->driver_data;
2416         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2417         unsigned int result = 0;
2418         unsigned int msr;
2419         unsigned int mcr;
2420         unsigned long flags;
2421 
2422         spin_lock_irqsave(&edge_port->ep_lock, flags);
2423 
2424         msr = edge_port->shadow_msr;
2425         mcr = edge_port->shadow_mcr;
2426         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2427                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2428                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2429                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2430                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2431                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2432 
2433 
2434         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2435         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2436 
2437         return result;
2438 }
2439 
2440 static int get_serial_info(struct tty_struct *tty,
2441                                 struct serial_struct *ss)
2442 {
2443         struct usb_serial_port *port = tty->driver_data;
2444         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2445         unsigned cwait;
2446 
2447         cwait = edge_port->port->port.closing_wait;
2448         if (cwait != ASYNC_CLOSING_WAIT_NONE)
2449                 cwait = jiffies_to_msecs(cwait) / 10;
2450 
2451         ss->type                = PORT_16550A;
2452         ss->line                = edge_port->port->minor;
2453         ss->port                = edge_port->port->port_number;
2454         ss->irq                 = 0;
2455         ss->xmit_fifo_size      = edge_port->port->bulk_out_size;
2456         ss->baud_base           = 9600;
2457         ss->close_delay         = 5*HZ;
2458         ss->closing_wait        = cwait;
2459         return 0;
2460 }
2461 
2462 static void edge_break(struct tty_struct *tty, int break_state)
2463 {
2464         struct usb_serial_port *port = tty->driver_data;
2465         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2466         int status;
2467         int bv = 0;     /* Off */
2468 
2469         if (break_state == -1)
2470                 bv = 1; /* On */
2471         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2472         if (status)
2473                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2474                         __func__, status);
2475 }
2476 
2477 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2478 {
2479         if (!edge_serial->use_heartbeat)
2480                 return;
2481 
2482         schedule_delayed_work(&edge_serial->heartbeat_work,
2483                         FW_HEARTBEAT_SECS * HZ);
2484 }
2485 
2486 static void edge_heartbeat_work(struct work_struct *work)
2487 {
2488         struct edgeport_serial *serial;
2489         struct ti_i2c_desc *rom_desc;
2490 
2491         serial = container_of(work, struct edgeport_serial,
2492                         heartbeat_work.work);
2493 
2494         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2495 
2496         /* Descriptor address request is enough to reset the firmware timer */
2497         if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2498                         rom_desc)) {
2499                 dev_err(&serial->serial->interface->dev,
2500                                 "%s - Incomplete heartbeat\n", __func__);
2501         }
2502         kfree(rom_desc);
2503 
2504         edge_heartbeat_schedule(serial);
2505 }
2506 
2507 static int edge_calc_num_ports(struct usb_serial *serial,
2508                                 struct usb_serial_endpoints *epds)
2509 {
2510         struct device *dev = &serial->interface->dev;
2511         unsigned char num_ports = serial->type->num_ports;
2512 
2513         /* Make sure we have the required endpoints when in download mode. */
2514         if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
2515                 if (epds->num_bulk_in < num_ports ||
2516                                 epds->num_bulk_out < num_ports ||
2517                                 epds->num_interrupt_in < 1) {
2518                         dev_err(dev, "required endpoints missing\n");
2519                         return -ENODEV;
2520                 }
2521         }
2522 
2523         return num_ports;
2524 }
2525 
2526 static int edge_startup(struct usb_serial *serial)
2527 {
2528         struct edgeport_serial *edge_serial;
2529         int status;
2530         u16 product_id;
2531 
2532         /* create our private serial structure */
2533         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2534         if (!edge_serial)
2535                 return -ENOMEM;
2536 
2537         mutex_init(&edge_serial->es_lock);
2538         edge_serial->serial = serial;
2539         INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2540         usb_set_serial_data(serial, edge_serial);
2541 
2542         status = download_fw(edge_serial);
2543         if (status < 0) {
2544                 kfree(edge_serial);
2545                 return status;
2546         }
2547 
2548         if (status > 0)
2549                 return 1;       /* bind but do not register any ports */
2550 
2551         product_id = le16_to_cpu(
2552                         edge_serial->serial->dev->descriptor.idProduct);
2553 
2554         /* Currently only the EP/416 models require heartbeat support */
2555         if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2556                 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2557                         product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2558                         edge_serial->use_heartbeat = true;
2559                 }
2560         }
2561 
2562         edge_heartbeat_schedule(edge_serial);
2563 
2564         return 0;
2565 }
2566 
2567 static void edge_disconnect(struct usb_serial *serial)
2568 {
2569         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2570 
2571         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2572 }
2573 
2574 static void edge_release(struct usb_serial *serial)
2575 {
2576         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2577 
2578         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2579         kfree(edge_serial);
2580 }
2581 
2582 static int edge_port_probe(struct usb_serial_port *port)
2583 {
2584         struct edgeport_port *edge_port;
2585         int ret;
2586 
2587         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2588         if (!edge_port)
2589                 return -ENOMEM;
2590 
2591         spin_lock_init(&edge_port->ep_lock);
2592         edge_port->port = port;
2593         edge_port->edge_serial = usb_get_serial_data(port->serial);
2594         edge_port->bUartMode = default_uart_mode;
2595 
2596         switch (port->port_number) {
2597         case 0:
2598                 edge_port->uart_base = UMPMEM_BASE_UART1;
2599                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2600                 break;
2601         case 1:
2602                 edge_port->uart_base = UMPMEM_BASE_UART2;
2603                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2604                 break;
2605         default:
2606                 dev_err(&port->dev, "unknown port number\n");
2607                 ret = -ENODEV;
2608                 goto err;
2609         }
2610 
2611         dev_dbg(&port->dev,
2612                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2613                 __func__, port->port_number, edge_port->uart_base,
2614                 edge_port->dma_address);
2615 
2616         usb_set_serial_port_data(port, edge_port);
2617 
2618         ret = edge_create_sysfs_attrs(port);
2619         if (ret)
2620                 goto err;
2621 
2622         port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2623         port->port.drain_delay = 1;
2624 
2625         return 0;
2626 err:
2627         kfree(edge_port);
2628 
2629         return ret;
2630 }
2631 
2632 static int edge_port_remove(struct usb_serial_port *port)
2633 {
2634         struct edgeport_port *edge_port;
2635 
2636         edge_port = usb_get_serial_port_data(port);
2637         edge_remove_sysfs_attrs(port);
2638         kfree(edge_port);
2639 
2640         return 0;
2641 }
2642 
2643 /* Sysfs Attributes */
2644 
2645 static ssize_t uart_mode_show(struct device *dev,
2646         struct device_attribute *attr, char *buf)
2647 {
2648         struct usb_serial_port *port = to_usb_serial_port(dev);
2649         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2650 
2651         return sprintf(buf, "%d\n", edge_port->bUartMode);
2652 }
2653 
2654 static ssize_t uart_mode_store(struct device *dev,
2655         struct device_attribute *attr, const char *valbuf, size_t count)
2656 {
2657         struct usb_serial_port *port = to_usb_serial_port(dev);
2658         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2659         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2660 
2661         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2662 
2663         if (v < 256)
2664                 edge_port->bUartMode = v;
2665         else
2666                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2667 
2668         return count;
2669 }
2670 static DEVICE_ATTR_RW(uart_mode);
2671 
2672 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2673 {
2674         return device_create_file(&port->dev, &dev_attr_uart_mode);
2675 }
2676 
2677 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2678 {
2679         device_remove_file(&port->dev, &dev_attr_uart_mode);
2680         return 0;
2681 }
2682 
2683 #ifdef CONFIG_PM
2684 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2685 {
2686         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2687 
2688         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2689 
2690         return 0;
2691 }
2692 
2693 static int edge_resume(struct usb_serial *serial)
2694 {
2695         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2696 
2697         edge_heartbeat_schedule(edge_serial);
2698 
2699         return 0;
2700 }
2701 #endif
2702 
2703 static struct usb_serial_driver edgeport_1port_device = {
2704         .driver = {
2705                 .owner          = THIS_MODULE,
2706                 .name           = "edgeport_ti_1",
2707         },
2708         .description            = "Edgeport TI 1 port adapter",
2709         .id_table               = edgeport_1port_id_table,
2710         .num_ports              = 1,
2711         .num_bulk_out           = 1,
2712         .open                   = edge_open,
2713         .close                  = edge_close,
2714         .throttle               = edge_throttle,
2715         .unthrottle             = edge_unthrottle,
2716         .attach                 = edge_startup,
2717         .calc_num_ports         = edge_calc_num_ports,
2718         .disconnect             = edge_disconnect,
2719         .release                = edge_release,
2720         .port_probe             = edge_port_probe,
2721         .port_remove            = edge_port_remove,
2722         .get_serial             = get_serial_info,
2723         .set_termios            = edge_set_termios,
2724         .tiocmget               = edge_tiocmget,
2725         .tiocmset               = edge_tiocmset,
2726         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2727         .get_icount             = usb_serial_generic_get_icount,
2728         .write                  = edge_write,
2729         .write_room             = edge_write_room,
2730         .chars_in_buffer        = edge_chars_in_buffer,
2731         .tx_empty               = edge_tx_empty,
2732         .break_ctl              = edge_break,
2733         .read_int_callback      = edge_interrupt_callback,
2734         .read_bulk_callback     = edge_bulk_in_callback,
2735         .write_bulk_callback    = edge_bulk_out_callback,
2736 #ifdef CONFIG_PM
2737         .suspend                = edge_suspend,
2738         .resume                 = edge_resume,
2739 #endif
2740 };
2741 
2742 static struct usb_serial_driver edgeport_2port_device = {
2743         .driver = {
2744                 .owner          = THIS_MODULE,
2745                 .name           = "edgeport_ti_2",
2746         },
2747         .description            = "Edgeport TI 2 port adapter",
2748         .id_table               = edgeport_2port_id_table,
2749         .num_ports              = 2,
2750         .num_bulk_out           = 1,
2751         .open                   = edge_open,
2752         .close                  = edge_close,
2753         .throttle               = edge_throttle,
2754         .unthrottle             = edge_unthrottle,
2755         .attach                 = edge_startup,
2756         .calc_num_ports         = edge_calc_num_ports,
2757         .disconnect             = edge_disconnect,
2758         .release                = edge_release,
2759         .port_probe             = edge_port_probe,
2760         .port_remove            = edge_port_remove,
2761         .get_serial             = get_serial_info,
2762         .set_termios            = edge_set_termios,
2763         .tiocmget               = edge_tiocmget,
2764         .tiocmset               = edge_tiocmset,
2765         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2766         .get_icount             = usb_serial_generic_get_icount,
2767         .write                  = edge_write,
2768         .write_room             = edge_write_room,
2769         .chars_in_buffer        = edge_chars_in_buffer,
2770         .tx_empty               = edge_tx_empty,
2771         .break_ctl              = edge_break,
2772         .read_int_callback      = edge_interrupt_callback,
2773         .read_bulk_callback     = edge_bulk_in_callback,
2774         .write_bulk_callback    = edge_bulk_out_callback,
2775 #ifdef CONFIG_PM
2776         .suspend                = edge_suspend,
2777         .resume                 = edge_resume,
2778 #endif
2779 };
2780 
2781 static struct usb_serial_driver * const serial_drivers[] = {
2782         &edgeport_1port_device, &edgeport_2port_device, NULL
2783 };
2784 
2785 module_usb_serial_driver(serial_drivers, id_table_combined);
2786 
2787 MODULE_AUTHOR(DRIVER_AUTHOR);
2788 MODULE_DESCRIPTION(DRIVER_DESC);
2789 MODULE_LICENSE("GPL");
2790 MODULE_FIRMWARE("edgeport/down3.bin");
2791 
2792 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2793 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2794 
2795 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2796 MODULE_PARM_DESC(ignore_cpu_rev,
2797                         "Ignore the cpu revision when connecting to a device");
2798 
2799 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2800 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/usb/serial/io_ti.c

DEFINITIONS
