arch/arm/mach-sa1100/assabet.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
ASSABET_BCR_frob
assabet_init_gpio
adv7171_start
adv7171_stop
adv7171_send
adv7171_write
adv7171_sleep
assabet_codec_reset
assabet_ucb1x00_reset
assabet_uda1341_reset
assabet_irda_set_power
assabet_irda_set_speed
assabet_lcd_set_visual
assabet_lcd_backlight_power
assabet_lcd_power
assabet_pal_backlight_power
assabet_pal_power
assabet_init
map_sa1100_gpio_regs
get_assabet_scr
fixup_assabet
assabet_uart_pm
assabet_map_io
assabet_init_irq
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/arch/arm/mach-sa1100/assabet.c
   4  *
   5  * Author: Nicolas Pitre
   6  *
   7  * This file contains all Assabet-specific tweaks.
   8  */
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/errno.h>
  13 #include <linux/gpio/gpio-reg.h>
  14 #include <linux/gpio/machine.h>
  15 #include <linux/gpio_keys.h>
  16 #include <linux/ioport.h>
  17 #include <linux/platform_data/sa11x0-serial.h>
  18 #include <linux/regulator/fixed.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/mfd/ucb1x00.h>
  23 #include <linux/mtd/mtd.h>
  24 #include <linux/mtd/partitions.h>
  25 #include <linux/delay.h>
  26 #include <linux/mm.h>
  27 #include <linux/leds.h>
  28 #include <linux/slab.h>
  29 
  30 #include <video/sa1100fb.h>
  31 
  32 #include <mach/hardware.h>
  33 #include <asm/mach-types.h>
  34 #include <asm/setup.h>
  35 #include <asm/page.h>
  36 #include <asm/pgtable-hwdef.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/tlbflush.h>
  39 
  40 #include <asm/mach/arch.h>
  41 #include <asm/mach/flash.h>
  42 #include <linux/platform_data/irda-sa11x0.h>
  43 #include <asm/mach/map.h>
  44 #include <mach/assabet.h>
  45 #include <linux/platform_data/mfd-mcp-sa11x0.h>
  46 #include <mach/irqs.h>
  47 
  48 #include "generic.h"
  49 
  50 #define ASSABET_BCR_DB1110 \
  51         (ASSABET_BCR_SPK_OFF    | \
  52          ASSABET_BCR_LED_GREEN  | ASSABET_BCR_LED_RED   | \
  53          ASSABET_BCR_RS232EN    | ASSABET_BCR_LCD_12RGB | \
  54          ASSABET_BCR_IRDA_MD0)
  55 
  56 #define ASSABET_BCR_DB1111 \
  57         (ASSABET_BCR_SPK_OFF    | \
  58          ASSABET_BCR_LED_GREEN  | ASSABET_BCR_LED_RED   | \
  59          ASSABET_BCR_RS232EN    | ASSABET_BCR_LCD_12RGB | \
  60          ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
  61          ASSABET_BCR_IRDA_MD0   | ASSABET_BCR_CF_RST)
  62 
  63 unsigned long SCR_value = ASSABET_SCR_INIT;
  64 EXPORT_SYMBOL(SCR_value);
  65 
  66 static struct gpio_chip *assabet_bcr_gc;
  67 
  68 static const char *assabet_names[] = {
  69         "cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel",
  70         "irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on",
  71         "audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on",
  72         "rs232_on", "nred_led", "ngreen_led", "vib_on",
  73         "com_dtr", "com_rts", "radio_wake_mod", "i2c_enab",
  74         "tvir_enab", "qmute", "radio_pwr_on", "spkr_off",
  75         "rs232_valid", "com_dcd", "com_cts", "com_dsr",
  76         "radio_cts", "radio_dsr", "radio_dcd", "radio_ri",
  77 };
  78 
  79 /* The old deprecated interface */
  80 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
  81 {
  82         unsigned long m = mask, v = val;
  83 
  84         assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
  85 }
  86 EXPORT_SYMBOL(ASSABET_BCR_frob);
  87 
  88 static int __init assabet_init_gpio(void __iomem *reg, u32 def_val)
  89 {
  90         struct gpio_chip *gc;
  91 
  92         writel_relaxed(def_val, reg);
  93 
  94         gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
  95                            assabet_names, NULL, NULL);
  96 
  97         if (IS_ERR(gc))
  98                 return PTR_ERR(gc);
  99 
 100         assabet_bcr_gc = gc;
 101 
 102         return gc->base;
 103 }
 104 
 105 /*
 106  * The codec reset goes to three devices, so we need to release
 107  * the rest when any one of these requests it.  However, that
 108  * causes the ADV7171 to consume around 100mA - more than half
 109  * the LCD-blanked power.
 110  *
 111  * With the ADV7171, LCD and backlight enabled, we go over
 112  * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
 113  * is connected, the Assabet crashes.
 114  */
 115 #define RST_UCB1X00 (1 << 0)
 116 #define RST_UDA1341 (1 << 1)
 117 #define RST_ADV7171 (1 << 2)
 118 
 119 #define SDA GPIO_GPIO(15)
 120 #define SCK GPIO_GPIO(18)
 121 #define MOD GPIO_GPIO(17)
 122 
 123 static void adv7171_start(void)
 124 {
 125         GPSR = SCK;
 126         udelay(1);
 127         GPSR = SDA;
 128         udelay(2);
 129         GPCR = SDA;
 130 }
 131 
 132 static void adv7171_stop(void)
 133 {
 134         GPSR = SCK;
 135         udelay(2);
 136         GPSR = SDA;
 137         udelay(1);
 138 }
 139 
 140 static void adv7171_send(unsigned byte)
 141 {
 142         unsigned i;
 143 
 144         for (i = 0; i < 8; i++, byte <<= 1) {
 145                 GPCR = SCK;
 146                 udelay(1);
 147                 if (byte & 0x80)
 148                         GPSR = SDA;
 149                 else
 150                         GPCR = SDA;
 151                 udelay(1);
 152                 GPSR = SCK;
 153                 udelay(1);
 154         }
 155         GPCR = SCK;
 156         udelay(1);
 157         GPSR = SDA;
 158         udelay(1);
 159         GPDR &= ~SDA;
 160         GPSR = SCK;
 161         udelay(1);
 162         if (GPLR & SDA)
 163                 printk(KERN_WARNING "No ACK from ADV7171\n");
 164         udelay(1);
 165         GPCR = SCK | SDA;
 166         udelay(1);
 167         GPDR |= SDA;
 168         udelay(1);
 169 }
 170 
 171 static void adv7171_write(unsigned reg, unsigned val)
 172 {
 173         unsigned gpdr = GPDR;
 174         unsigned gplr = GPLR;
 175 
 176         ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
 177         udelay(100);
 178 
 179         GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
 180         GPDR = (GPDR | SCK | MOD) & ~SDA;
 181         udelay(10);
 182         if (!(GPLR & SDA))
 183                 printk(KERN_WARNING "Something dragging SDA down?\n");
 184         GPDR |= SDA;
 185 
 186         adv7171_start();
 187         adv7171_send(0x54);
 188         adv7171_send(reg);
 189         adv7171_send(val);
 190         adv7171_stop();
 191 
 192         /* Restore GPIO state for L3 bus */
 193         GPSR = gplr & (SDA | SCK | MOD);
 194         GPCR = (~gplr) & (SDA | SCK | MOD);
 195         GPDR = gpdr;
 196 }
 197 
 198 static void adv7171_sleep(void)
 199 {
 200         /* Put the ADV7171 into sleep mode */
 201         adv7171_write(0x04, 0x40);
 202 }
 203 
 204 static unsigned codec_nreset;
 205 
 206 static void assabet_codec_reset(unsigned mask, int set)
 207 {
 208         unsigned long flags;
 209         bool old;
 210 
 211         local_irq_save(flags);
 212         old = !codec_nreset;
 213         if (set)
 214                 codec_nreset &= ~mask;
 215         else
 216                 codec_nreset |= mask;
 217 
 218         if (old != !codec_nreset) {
 219                 if (codec_nreset) {
 220                         ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
 221                         adv7171_sleep();
 222                 } else {
 223                         ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
 224                 }
 225         }
 226         local_irq_restore(flags);
 227 }
 228 
 229 static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
 230 {
 231         int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
 232                 state == UCB_RST_PROBE_FAIL;
 233         assabet_codec_reset(RST_UCB1X00, set);
 234 }
 235 
 236 void assabet_uda1341_reset(int set)
 237 {
 238         assabet_codec_reset(RST_UDA1341, set);
 239 }
 240 EXPORT_SYMBOL(assabet_uda1341_reset);
 241 
 242 
 243 /*
 244  * Assabet flash support code.
 245  */
 246 
 247 #ifdef ASSABET_REV_4
 248 /*
 249  * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
 250  */
 251 static struct mtd_partition assabet_partitions[] = {
 252         {
 253                 .name           = "bootloader",
 254                 .size           = 0x00020000,
 255                 .offset         = 0,
 256                 .mask_flags     = MTD_WRITEABLE,
 257         }, {
 258                 .name           = "bootloader params",
 259                 .size           = 0x00020000,
 260                 .offset         = MTDPART_OFS_APPEND,
 261                 .mask_flags     = MTD_WRITEABLE,
 262         }, {
 263                 .name           = "jffs",
 264                 .size           = MTDPART_SIZ_FULL,
 265                 .offset         = MTDPART_OFS_APPEND,
 266         }
 267 };
 268 #else
 269 /*
 270  * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
 271  */
 272 static struct mtd_partition assabet_partitions[] = {
 273         {
 274                 .name           = "bootloader",
 275                 .size           = 0x00040000,
 276                 .offset         = 0,
 277                 .mask_flags     = MTD_WRITEABLE,
 278         }, {
 279                 .name           = "bootloader params",
 280                 .size           = 0x00040000,
 281                 .offset         = MTDPART_OFS_APPEND,
 282                 .mask_flags     = MTD_WRITEABLE,
 283         }, {
 284                 .name           = "jffs",
 285                 .size           = MTDPART_SIZ_FULL,
 286                 .offset         = MTDPART_OFS_APPEND,
 287         }
 288 };
 289 #endif
 290 
 291 static struct flash_platform_data assabet_flash_data = {
 292         .map_name       = "cfi_probe",
 293         .parts          = assabet_partitions,
 294         .nr_parts       = ARRAY_SIZE(assabet_partitions),
 295 };
 296 
 297 static struct resource assabet_flash_resources[] = {
 298         DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
 299         DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
 300 };
 301 
 302 
 303 /*
 304  * Assabet IrDA support code.
 305  */
 306 
 307 static int assabet_irda_set_power(struct device *dev, unsigned int state)
 308 {
 309         static unsigned int bcr_state[4] = {
 310                 ASSABET_BCR_IRDA_MD0,
 311                 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
 312                 ASSABET_BCR_IRDA_MD1,
 313                 0
 314         };
 315 
 316         if (state < 4)
 317                 ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0,
 318                                  bcr_state[state]);
 319         return 0;
 320 }
 321 
 322 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
 323 {
 324         if (speed < 4000000)
 325                 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
 326         else
 327                 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
 328 }
 329 
 330 static struct irda_platform_data assabet_irda_data = {
 331         .set_power      = assabet_irda_set_power,
 332         .set_speed      = assabet_irda_set_speed,
 333 };
 334 
 335 static struct ucb1x00_plat_data assabet_ucb1x00_data = {
 336         .reset          = assabet_ucb1x00_reset,
 337         .gpio_base      = -1,
 338         .can_wakeup     = 1,
 339 };
 340 
 341 static struct mcp_plat_data assabet_mcp_data = {
 342         .mccr0          = MCCR0_ADM,
 343         .sclk_rate      = 11981000,
 344         .codec_pdata    = &assabet_ucb1x00_data,
 345 };
 346 
 347 static void assabet_lcd_set_visual(u32 visual)
 348 {
 349         u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;
 350 
 351         if (machine_is_assabet()) {
 352 #if 1           // phase 4 or newer Assabet's
 353                 if (is_true_color)
 354                         ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
 355                 else
 356                         ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
 357 #else
 358                 // older Assabet's
 359                 if (is_true_color)
 360                         ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
 361                 else
 362                         ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
 363 #endif
 364         }
 365 }
 366 
 367 #ifndef ASSABET_PAL_VIDEO
 368 static void assabet_lcd_backlight_power(int on)
 369 {
 370         if (on)
 371                 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
 372         else
 373                 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
 374 }
 375 
 376 /*
 377  * Turn on/off the backlight.  When turning the backlight on, we wait
 378  * 500us after turning it on so we don't cause the supplies to droop
 379  * when we enable the LCD controller (and cause a hard reset.)
 380  */
 381 static void assabet_lcd_power(int on)
 382 {
 383         if (on) {
 384                 ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
 385                 udelay(500);
 386         } else
 387                 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
 388 }
 389 
 390 /*
 391  * The assabet uses a sharp LQ039Q2DS54 LCD module.  It is actually
 392  * takes an RGB666 signal, but we provide it with an RGB565 signal
 393  * instead (def_rgb_16).
 394  */
 395 static struct sa1100fb_mach_info lq039q2ds54_info = {
 396         .pixclock       = 171521,       .bpp            = 16,
 397         .xres           = 320,          .yres           = 240,
 398 
 399         .hsync_len      = 5,            .vsync_len      = 1,
 400         .left_margin    = 61,           .upper_margin   = 3,
 401         .right_margin   = 9,            .lower_margin   = 0,
 402 
 403         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 404 
 405         .lccr0          = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
 406         .lccr3          = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),
 407 
 408         .backlight_power = assabet_lcd_backlight_power,
 409         .lcd_power = assabet_lcd_power,
 410         .set_visual = assabet_lcd_set_visual,
 411 };
 412 #else
 413 static void assabet_pal_backlight_power(int on)
 414 {
 415         ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
 416 }
 417 
 418 static void assabet_pal_power(int on)
 419 {
 420         ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
 421 }
 422 
 423 static struct sa1100fb_mach_info pal_info = {
 424         .pixclock       = 67797,        .bpp            = 16,
 425         .xres           = 640,          .yres           = 512,
 426 
 427         .hsync_len      = 64,           .vsync_len      = 6,
 428         .left_margin    = 125,          .upper_margin   = 70,
 429         .right_margin   = 115,          .lower_margin   = 36,
 430 
 431         .lccr0          = LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
 432         .lccr3          = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),
 433 
 434         .backlight_power = assabet_pal_backlight_power,
 435         .lcd_power = assabet_pal_power,
 436         .set_visual = assabet_lcd_set_visual,
 437 };
 438 #endif
 439 
 440 #ifdef CONFIG_ASSABET_NEPONSET
 441 static struct resource neponset_resources[] = {
 442         DEFINE_RES_MEM(0x10000000, 0x08000000),
 443         DEFINE_RES_MEM(0x18000000, 0x04000000),
 444         DEFINE_RES_MEM(0x40000000, SZ_8K),
 445         DEFINE_RES_IRQ(IRQ_GPIO25),
 446 };
 447 #endif
 448 
 449 static struct gpiod_lookup_table assabet_cf_gpio_table = {
 450         .dev_id = "sa11x0-pcmcia.1",
 451         .table = {
 452                 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
 453                 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
 454                 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
 455                 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
 456                 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
 457                 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
 458                 { },
 459         },
 460 };
 461 
 462 static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
 463         REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
 464 };
 465 
 466 static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
 467         .supply_name = "cf-power",
 468         .microvolts = 3300000,
 469 };
 470 
 471 static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = {
 472         .dev_id = "reg-fixed-voltage.0",
 473         .table = {
 474                 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH),
 475                 { },
 476         },
 477 };
 478 
 479 static struct gpio_led assabet_leds[] __initdata = {
 480         {
 481                 .name = "assabet:red",
 482                 .default_trigger = "cpu0",
 483                 .active_low = 1,
 484                 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
 485         }, {
 486                 .name = "assabet:green",
 487                 .default_trigger = "heartbeat",
 488                 .active_low = 1,
 489                 .default_state = LEDS_GPIO_DEFSTATE_KEEP,
 490         },
 491 };
 492 
 493 static const struct gpio_led_platform_data assabet_leds_pdata __initconst = {
 494         .num_leds = ARRAY_SIZE(assabet_leds),
 495         .leds = assabet_leds,
 496 };
 497 
 498 static struct gpio_keys_button assabet_keys_buttons[] = {
 499         {
 500                 .gpio = 0,
 501                 .irq = IRQ_GPIO0,
 502                 .desc = "gpio0",
 503                 .wakeup = 1,
 504                 .can_disable = 1,
 505                 .debounce_interval = 5,
 506         }, {
 507                 .gpio = 1,
 508                 .irq = IRQ_GPIO1,
 509                 .desc = "gpio1",
 510                 .wakeup = 1,
 511                 .can_disable = 1,
 512                 .debounce_interval = 5,
 513         },
 514 };
 515 
 516 static const struct gpio_keys_platform_data assabet_keys_pdata = {
 517         .buttons = assabet_keys_buttons,
 518         .nbuttons = ARRAY_SIZE(assabet_keys_buttons),
 519         .rep = 0,
 520 };
 521 
 522 static struct gpiod_lookup_table assabet_uart1_gpio_table = {
 523         .dev_id = "sa11x0-uart.1",
 524         .table = {
 525                 GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW),
 526                 GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW),
 527                 GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW),
 528                 GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW),
 529                 GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW),
 530                 { },
 531         },
 532 };
 533 
 534 static struct gpiod_lookup_table assabet_uart3_gpio_table = {
 535         .dev_id = "sa11x0-uart.3",
 536         .table = {
 537                 GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW),
 538                 GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW),
 539                 GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW),
 540                 GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW),
 541                 { },
 542         },
 543 };
 544 
 545 static void __init assabet_init(void)
 546 {
 547         /*
 548          * Ensure that the power supply is in "high power" mode.
 549          */
 550         GPSR = GPIO_GPIO16;
 551         GPDR |= GPIO_GPIO16;
 552 
 553         /*
 554          * Ensure that these pins are set as outputs and are driving
 555          * logic 0.  This ensures that we won't inadvertently toggle
 556          * the WS latch in the CPLD, and we don't float causing
 557          * excessive power drain.  --rmk
 558          */
 559         GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
 560         GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
 561 
 562         /*
 563          * Also set GPIO27 as an output; this is used to clock UART3
 564          * via the FPGA and as otherwise has no pullups or pulldowns,
 565          * so stop it floating.
 566          */
 567         GPCR = GPIO_GPIO27;
 568         GPDR |= GPIO_GPIO27;
 569 
 570         /*
 571          * Set up registers for sleep mode.
 572          */
 573         PWER = PWER_GPIO0;
 574         PGSR = 0;
 575         PCFR = 0;
 576         PSDR = 0;
 577         PPDR |= PPC_TXD3 | PPC_TXD1;
 578         PPSR |= PPC_TXD3 | PPC_TXD1;
 579 
 580         sa11x0_ppc_configure_mcp();
 581 
 582         if (machine_has_neponset()) {
 583 #ifndef CONFIG_ASSABET_NEPONSET
 584                 printk( "Warning: Neponset detected but full support "
 585                         "hasn't been configured in the kernel\n" );
 586 #else
 587                 platform_device_register_simple("neponset", 0,
 588                         neponset_resources, ARRAY_SIZE(neponset_resources));
 589 #endif
 590         } else {
 591                 gpiod_add_lookup_table(&assabet_uart1_gpio_table);
 592                 gpiod_add_lookup_table(&assabet_uart3_gpio_table);
 593                 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);
 594 
 595                 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
 596                                         assabet_cf_vcc_consumers,
 597                                         ARRAY_SIZE(assabet_cf_vcc_consumers),
 598                                         true);
 599 
 600         }
 601 
 602         platform_device_register_resndata(NULL, "gpio-keys", 0,
 603                                           NULL, 0,
 604                                           &assabet_keys_pdata,
 605                                           sizeof(assabet_keys_pdata));
 606 
 607         gpio_led_register_device(-1, &assabet_leds_pdata);
 608 
 609 #ifndef ASSABET_PAL_VIDEO
 610         sa11x0_register_lcd(&lq039q2ds54_info);
 611 #else
 612         sa11x0_register_lcd(&pal_video);
 613 #endif
 614         sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
 615                             ARRAY_SIZE(assabet_flash_resources));
 616         sa11x0_register_irda(&assabet_irda_data);
 617         sa11x0_register_mcp(&assabet_mcp_data);
 618 
 619         if (!machine_has_neponset())
 620                 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
 621 }
 622 
 623 /*
 624  * On Assabet, we must probe for the Neponset board _before_
 625  * paging_init() has occurred to actually determine the amount
 626  * of RAM available.  To do so, we map the appropriate IO section
 627  * in the page table here in order to access GPIO registers.
 628  */
 629 static void __init map_sa1100_gpio_regs( void )
 630 {
 631         unsigned long phys = __PREG(GPLR) & PMD_MASK;
 632         unsigned long virt = (unsigned long)io_p2v(phys);
 633         int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
 634         pmd_t *pmd;
 635 
 636         pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
 637         *pmd = __pmd(phys | prot);
 638         flush_pmd_entry(pmd);
 639 }
 640 
 641 /*
 642  * Read System Configuration "Register"
 643  * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
 644  * User's Guide", section 4.4.1)
 645  *
 646  * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
 647  * to set up the serial port for decompression status messages. We
 648  * repeat it here because the kernel may not be loaded as a zImage, and
 649  * also because it's a hassle to communicate the SCR value to the kernel
 650  * from the decompressor.
 651  *
 652  * Note that IRQs are guaranteed to be disabled.
 653  */
 654 static void __init get_assabet_scr(void)
 655 {
 656         unsigned long uninitialized_var(scr), i;
 657 
 658         GPDR |= 0x3fc;                  /* Configure GPIO 9:2 as outputs */
 659         GPSR = 0x3fc;                   /* Write 0xFF to GPIO 9:2 */
 660         GPDR &= ~(0x3fc);               /* Configure GPIO 9:2 as inputs */
 661         for(i = 100; i--; )             /* Read GPIO 9:2 */
 662                 scr = GPLR;
 663         GPDR |= 0x3fc;                  /*  restore correct pin direction */
 664         scr &= 0x3fc;                   /* save as system configuration byte. */
 665         SCR_value = scr;
 666 }
 667 
 668 static void __init
 669 fixup_assabet(struct tag *tags, char **cmdline)
 670 {
 671         /* This must be done before any call to machine_has_neponset() */
 672         map_sa1100_gpio_regs();
 673         get_assabet_scr();
 674 
 675         if (machine_has_neponset())
 676                 printk("Neponset expansion board detected\n");
 677 }
 678 
 679 
 680 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 681 {
 682         if (port->mapbase == _Ser1UTCR0) {
 683                 if (state)
 684                         ASSABET_BCR_clear(ASSABET_BCR_RS232EN);
 685                 else
 686                         ASSABET_BCR_set(ASSABET_BCR_RS232EN);
 687         }
 688 }
 689 
 690 static struct sa1100_port_fns assabet_port_fns __initdata = {
 691         .pm             = assabet_uart_pm,
 692 };
 693 
 694 static struct map_desc assabet_io_desc[] __initdata = {
 695         {       /* Board Control Register */
 696                 .virtual        =  0xf1000000,
 697                 .pfn            = __phys_to_pfn(0x12000000),
 698                 .length         = 0x00100000,
 699                 .type           = MT_DEVICE
 700         }, {    /* MQ200 */
 701                 .virtual        =  0xf2800000,
 702                 .pfn            = __phys_to_pfn(0x4b800000),
 703                 .length         = 0x00800000,
 704                 .type           = MT_DEVICE
 705         }
 706 };
 707 
 708 static void __init assabet_map_io(void)
 709 {
 710         sa1100_map_io();
 711         iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));
 712 
 713         /*
 714          * Set SUS bit in SDCR0 so serial port 1 functions.
 715          * Its called GPCLKR0 in my SA1110 manual.
 716          */
 717         Ser1SDCR0 |= SDCR0_SUS;
 718         MSC1 = (MSC1 & ~0xffff) |
 719                 MSC_NonBrst | MSC_32BitStMem |
 720                 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);
 721 
 722         if (!machine_has_neponset())
 723                 sa1100_register_uart_fns(&assabet_port_fns);
 724 
 725         /*
 726          * When Neponset is attached, the first UART should be
 727          * UART3.  That's what Angel is doing and many documents
 728          * are stating this.
 729          *
 730          * We do the Neponset mapping even if Neponset support
 731          * isn't compiled in so the user will still get something on
 732          * the expected physical serial port.
 733          *
 734          * We no longer do this; not all boot loaders support it,
 735          * and UART3 appears to be somewhat unreliable with blob.
 736          */
 737         sa1100_register_uart(0, 1);
 738         sa1100_register_uart(2, 3);
 739 }
 740 
 741 void __init assabet_init_irq(void)
 742 {
 743         unsigned int assabet_gpio_base;
 744         u32 def_val;
 745 
 746         sa1100_init_irq();
 747 
 748         if (machine_has_neponset())
 749                 def_val = ASSABET_BCR_DB1111;
 750         else
 751                 def_val = ASSABET_BCR_DB1110;
 752 
 753         /*
 754          * Angel sets this, but other bootloaders may not.
 755          *
 756          * This must precede any driver calls to BCR_set() or BCR_clear().
 757          */
 758         assabet_gpio_base = assabet_init_gpio((void *)&ASSABET_BCR, def_val);
 759 
 760         assabet_leds[0].gpio = assabet_gpio_base + 13;
 761         assabet_leds[1].gpio = assabet_gpio_base + 14;
 762 }
 763 
 764 MACHINE_START(ASSABET, "Intel-Assabet")
 765         .atag_offset    = 0x100,
 766         .fixup          = fixup_assabet,
 767         .map_io         = assabet_map_io,
 768         .nr_irqs        = SA1100_NR_IRQS,
 769         .init_irq       = assabet_init_irq,
 770         .init_time      = sa1100_timer_init,
 771         .init_machine   = assabet_init,
 772         .init_late      = sa11x0_init_late,
 773 #ifdef CONFIG_SA1111
 774         .dma_zone_size  = SZ_1M,
 775 #endif
 776         .restart        = sa11x0_restart,
 777 MACHINE_END
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root/arch/arm/mach-sa1100/assabet.c

DEFINITIONS
