root/arch/arm/mach-iop32x/iq31244.c

DEFINITIONS

1. is_80219
2. is_ep80219
3. iq31244_timer_init
4. iq31244_map_io
5. ep80219_pci_map_irq
6. iq31244_pci_map_irq
7. iq31244_pci_init
8. ep80219_power_off
9. iq31244_init_machine
10. force_ep80219_setup

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-iop32x/iq31244.c
   4  *
   5  * Board support code for the Intel EP80219 and IQ31244 platforms.
   6  *
   7  * Author: Rory Bolt <rorybolt@pacbell.net>
   8  * Copyright (C) 2002 Rory Bolt
   9  * Copyright 2003 (c) MontaVista, Software, Inc.
  10  * Copyright (C) 2004 Intel Corp.
  11  */
  12 
  13 #include <linux/mm.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/kernel.h>
  17 #include <linux/pci.h>
  18 #include <linux/pm.h>
  19 #include <linux/string.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/serial_8250.h>
  22 #include <linux/mtd/physmap.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/io.h>
  25 #include <linux/gpio/machine.h>
  26 #include <asm/cputype.h>
  27 #include <asm/irq.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/mach/pci.h>
  31 #include <asm/mach/time.h>
  32 #include <asm/mach-types.h>
  33 #include <asm/page.h>
  34 #include <asm/pgtable.h>
  35 
  36 #include "hardware.h"
  37 #include "irqs.h"
  38 #include "gpio-iop32x.h"
  39 
  40 /*
  41  * Until March of 2007 iq31244 platforms and ep80219 platforms shared the
  42  * same machine id, and the processor type was used to select board type.
  43  * However this assumption breaks for an iq80219 board which is an iop219
  44  * processor on an iq31244 board.  The force_ep80219 flag has been added
  45  * for old boot loaders using the iq31244 machine id for an ep80219 platform.
  46  */
  47 static int force_ep80219;
  48 
  49 static int is_80219(void)
  50 {
  51         return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
  52 }
  53 
  54 static int is_ep80219(void)
  55 {
  56         if (machine_is_ep80219() || force_ep80219)
  57                 return 1;
  58         else
  59                 return 0;
  60 }
  61 
  62 
  63 /*
  64  * EP80219/IQ31244 timer tick configuration.
  65  */
  66 static void __init iq31244_timer_init(void)
  67 {
  68         if (is_ep80219()) {
  69                 /* 33.333 MHz crystal.  */
  70                 iop_init_time(200000000);
  71         } else {
  72                 /* 33.000 MHz crystal.  */
  73                 iop_init_time(198000000);
  74         }
  75 }
  76 
  77 
  78 /*
  79  * IQ31244 I/O.
  80  */
  81 static struct map_desc iq31244_io_desc[] __initdata = {
  82         {       /* on-board devices */
  83                 .virtual        = IQ31244_UART,
  84                 .pfn            = __phys_to_pfn(IQ31244_UART),
  85                 .length         = 0x00100000,
  86                 .type           = MT_DEVICE,
  87         },
  88 };
  89 
  90 void __init iq31244_map_io(void)
  91 {
  92         iop3xx_map_io();
  93         iotable_init(iq31244_io_desc, ARRAY_SIZE(iq31244_io_desc));
  94 }
  95 
  96 
  97 /*
  98  * EP80219/IQ31244 PCI.
  99  */
 100 static int __init
 101 ep80219_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 102 {
 103         int irq;
 104 
 105         if (slot == 0) {
 106                 /* CFlash */
 107                 irq = IRQ_IOP32X_XINT1;
 108         } else if (slot == 1) {
 109                 /* 82551 Pro 100 */
 110                 irq = IRQ_IOP32X_XINT0;
 111         } else if (slot == 2) {
 112                 /* PCI-X Slot */
 113                 irq = IRQ_IOP32X_XINT3;
 114         } else if (slot == 3) {
 115                 /* SATA */
 116                 irq = IRQ_IOP32X_XINT2;
 117         } else {
 118                 printk(KERN_ERR "ep80219_pci_map_irq() called for unknown "
 119                         "device PCI:%d:%d:%d\n", dev->bus->number,
 120                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 121                 irq = -1;
 122         }
 123 
 124         return irq;
 125 }
 126 
 127 static struct hw_pci ep80219_pci __initdata = {
 128         .nr_controllers = 1,
 129         .ops            = &iop3xx_ops,
 130         .setup          = iop3xx_pci_setup,
 131         .preinit        = iop3xx_pci_preinit,
 132         .map_irq        = ep80219_pci_map_irq,
 133 };
 134 
 135 static int __init
 136 iq31244_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 137 {
 138         int irq;
 139 
 140         if (slot == 0) {
 141                 /* CFlash */
 142                 irq = IRQ_IOP32X_XINT1;
 143         } else if (slot == 1) {
 144                 /* SATA */
 145                 irq = IRQ_IOP32X_XINT2;
 146         } else if (slot == 2) {
 147                 /* PCI-X Slot */
 148                 irq = IRQ_IOP32X_XINT3;
 149         } else if (slot == 3) {
 150                 /* 82546 GigE */
 151                 irq = IRQ_IOP32X_XINT0;
 152         } else {
 153                 printk(KERN_ERR "iq31244_pci_map_irq called for unknown "
 154                         "device PCI:%d:%d:%d\n", dev->bus->number,
 155                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 156                 irq = -1;
 157         }
 158 
 159         return irq;
 160 }
 161 
 162 static struct hw_pci iq31244_pci __initdata = {
 163         .nr_controllers = 1,
 164         .ops            = &iop3xx_ops,
 165         .setup          = iop3xx_pci_setup,
 166         .preinit        = iop3xx_pci_preinit,
 167         .map_irq        = iq31244_pci_map_irq,
 168 };
 169 
 170 static int __init iq31244_pci_init(void)
 171 {
 172         if (is_ep80219())
 173                 pci_common_init(&ep80219_pci);
 174         else if (machine_is_iq31244()) {
 175                 if (is_80219()) {
 176                         printk("note: iq31244 board type has been selected\n");
 177                         printk("note: to select ep80219 operation:\n");
 178                         printk("\t1/ specify \"force_ep80219\" on the kernel"
 179                                 " command line\n");
 180                         printk("\t2/ update boot loader to pass"
 181                                 " the ep80219 id: %d\n", MACH_TYPE_EP80219);
 182                 }
 183                 pci_common_init(&iq31244_pci);
 184         }
 185 
 186         return 0;
 187 }
 188 
 189 subsys_initcall(iq31244_pci_init);
 190 
 191 
 192 /*
 193  * IQ31244 machine initialisation.
 194  */
 195 static struct physmap_flash_data iq31244_flash_data = {
 196         .width          = 2,
 197 };
 198 
 199 static struct resource iq31244_flash_resource = {
 200         .start          = 0xf0000000,
 201         .end            = 0xf07fffff,
 202         .flags          = IORESOURCE_MEM,
 203 };
 204 
 205 static struct platform_device iq31244_flash_device = {
 206         .name           = "physmap-flash",
 207         .id             = 0,
 208         .dev            = {
 209                 .platform_data  = &iq31244_flash_data,
 210         },
 211         .num_resources  = 1,
 212         .resource       = &iq31244_flash_resource,
 213 };
 214 
 215 static struct plat_serial8250_port iq31244_serial_port[] = {
 216         {
 217                 .mapbase        = IQ31244_UART,
 218                 .membase        = (char *)IQ31244_UART,
 219                 .irq            = IRQ_IOP32X_XINT1,
 220                 .flags          = UPF_SKIP_TEST,
 221                 .iotype         = UPIO_MEM,
 222                 .regshift       = 0,
 223                 .uartclk        = 1843200,
 224         },
 225         { },
 226 };
 227 
 228 static struct resource iq31244_uart_resource = {
 229         .start          = IQ31244_UART,
 230         .end            = IQ31244_UART + 7,
 231         .flags          = IORESOURCE_MEM,
 232 };
 233 
 234 static struct platform_device iq31244_serial_device = {
 235         .name           = "serial8250",
 236         .id             = PLAT8250_DEV_PLATFORM,
 237         .dev            = {
 238                 .platform_data          = iq31244_serial_port,
 239         },
 240         .num_resources  = 1,
 241         .resource       = &iq31244_uart_resource,
 242 };
 243 
 244 /*
 245  * This function will send a SHUTDOWN_COMPLETE message to the PIC
 246  * controller over I2C.  We are not using the i2c subsystem since
 247  * we are going to power off and it may be removed
 248  */
 249 void ep80219_power_off(void)
 250 {
 251         /*
 252          * Send the Address byte w/ the start condition
 253          */
 254         *IOP3XX_IDBR1 = 0x60;
 255         *IOP3XX_ICR1 = 0xE9;
 256         mdelay(1);
 257 
 258         /*
 259          * Send the START_MSG byte w/ no start or stop condition
 260          */
 261         *IOP3XX_IDBR1 = 0x0F;
 262         *IOP3XX_ICR1 = 0xE8;
 263         mdelay(1);
 264 
 265         /*
 266          * Send the SHUTDOWN_COMPLETE Message ID byte w/ no start or
 267          * stop condition
 268          */
 269         *IOP3XX_IDBR1 = 0x03;
 270         *IOP3XX_ICR1 = 0xE8;
 271         mdelay(1);
 272 
 273         /*
 274          * Send an ignored byte w/ stop condition
 275          */
 276         *IOP3XX_IDBR1 = 0x00;
 277         *IOP3XX_ICR1 = 0xEA;
 278 
 279         while (1)
 280                 ;
 281 }
 282 
 283 static void __init iq31244_init_machine(void)
 284 {
 285         register_iop32x_gpio();
 286         gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
 287         gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup);
 288         platform_device_register(&iop3xx_i2c0_device);
 289         platform_device_register(&iop3xx_i2c1_device);
 290         platform_device_register(&iq31244_flash_device);
 291         platform_device_register(&iq31244_serial_device);
 292         platform_device_register(&iop3xx_dma_0_channel);
 293         platform_device_register(&iop3xx_dma_1_channel);
 294 
 295         if (is_ep80219())
 296                 pm_power_off = ep80219_power_off;
 297 
 298         if (!is_80219())
 299                 platform_device_register(&iop3xx_aau_channel);
 300 }
 301 
 302 static int __init force_ep80219_setup(char *str)
 303 {
 304         force_ep80219 = 1;
 305         return 1;
 306 }
 307 
 308 __setup("force_ep80219", force_ep80219_setup);
 309 
 310 MACHINE_START(IQ31244, "Intel IQ31244")
 311         /* Maintainer: Intel Corp. */
 312         .atag_offset    = 0x100,
 313         .map_io         = iq31244_map_io,
 314         .init_irq       = iop32x_init_irq,
 315         .init_time      = iq31244_timer_init,
 316         .init_machine   = iq31244_init_machine,
 317         .restart        = iop3xx_restart,
 318 MACHINE_END
 319 
 320 /* There should have been an ep80219 machine identifier from the beginning.
 321  * Boot roms older than March 2007 do not know the ep80219 machine id.  Pass
 322  * "force_ep80219" on the kernel command line, otherwise iq31244 operation
 323  * will be selected.
 324  */
 325 MACHINE_START(EP80219, "Intel EP80219")
 326         /* Maintainer: Intel Corp. */
 327         .atag_offset    = 0x100,
 328         .map_io         = iq31244_map_io,
 329         .init_irq       = iop32x_init_irq,
 330         .init_time      = iq31244_timer_init,
 331         .init_machine   = iq31244_init_machine,
 332         .restart        = iop3xx_restart,
 333 MACHINE_END