arch/arm/mach-iop32x/n2100.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-iop32x/n2100.c
   4  *
   5  * Board support code for the Thecus N2100 platform.
   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/f75375s.h>
  16 #include <linux/leds-pca9532.h>
  17 #include <linux/delay.h>
  18 #include <linux/kernel.h>
  19 #include <linux/pci.h>
  20 #include <linux/pm.h>
  21 #include <linux/string.h>
  22 #include <linux/serial_core.h>
  23 #include <linux/serial_8250.h>
  24 #include <linux/mtd/physmap.h>
  25 #include <linux/i2c.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/reboot.h>
  28 #include <linux/io.h>
  29 #include <linux/gpio.h>
  30 #include <mach/hardware.h>
  31 #include <asm/irq.h>
  32 #include <asm/mach/arch.h>
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/pci.h>
  35 #include <asm/mach/time.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/page.h>
  38 #include <asm/pgtable.h>
  39 #include <mach/time.h>
  40 #include "gpio-iop32x.h"
  41
  42 /*
  43  * N2100 timer tick configuration.
  44  */
  45 static void __init n2100_timer_init(void)
  46 {
  47         /* 33.000 MHz crystal.  */
  48         iop_init_time(198000000);
  49 }
  50
  51
  52 /*
  53  * N2100 I/O.
  54  */
  55 static struct map_desc n2100_io_desc[] __initdata = {
  56         {       /* on-board devices */
  57                 .virtual        = N2100_UART,
  58                 .pfn            = __phys_to_pfn(N2100_UART),
  59                 .length         = 0x00100000,
  60                 .type           = MT_DEVICE
  61         },
  62 };
  63
  64 void __init n2100_map_io(void)
  65 {
  66         iop3xx_map_io();
  67         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  68 }
  69
  70
  71 /*
  72  * N2100 PCI.
  73  */
  74 static int n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  75 {
  76         int irq;
  77
  78         if (PCI_SLOT(dev->devfn) == 1) {
  79                 /* RTL8110SB #1 */
  80                 irq = IRQ_IOP32X_XINT0;
  81         } else if (PCI_SLOT(dev->devfn) == 2) {
  82                 /* RTL8110SB #2 */
  83                 irq = IRQ_IOP32X_XINT3;
  84         } else if (PCI_SLOT(dev->devfn) == 3) {
  85                 /* Sil3512 */
  86                 irq = IRQ_IOP32X_XINT2;
  87         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  88                 /* VT6212 INTA */
  89                 irq = IRQ_IOP32X_XINT1;
  90         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  91                 /* VT6212 INTB */
  92                 irq = IRQ_IOP32X_XINT0;
  93         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
  94                 /* VT6212 INTC */
  95                 irq = IRQ_IOP32X_XINT2;
  96         } else if (PCI_SLOT(dev->devfn) == 5) {
  97                 /* Mini-PCI slot */
  98                 irq = IRQ_IOP32X_XINT3;
  99         } else {
 100                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 101                         "device PCI:%d:%d:%d\n", dev->bus->number,
 102                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 103                 irq = -1;
 104         }
 105
 106         return irq;
 107 }
 108
 109 static struct hw_pci n2100_pci __initdata = {
 110         .nr_controllers = 1,
 111         .ops            = &iop3xx_ops,
 112         .setup          = iop3xx_pci_setup,
 113         .preinit        = iop3xx_pci_preinit,
 114         .map_irq        = n2100_pci_map_irq,
 115 };
 116
 117 /*
 118  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 119  * the ->broken_parity_status flag for both ports so that the r8169
 120  * driver knows it should ignore error interrupts.
 121  */
 122 static void n2100_fixup_r8169(struct pci_dev *dev)
 123 {
 124         if (dev->bus->number == 0 &&
 125             (dev->devfn == PCI_DEVFN(1, 0) ||
 126              dev->devfn == PCI_DEVFN(2, 0)))
 127                 dev->broken_parity_status = 1;
 128 }
 129 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 130
 131 static int __init n2100_pci_init(void)
 132 {
 133         if (machine_is_n2100())
 134                 pci_common_init(&n2100_pci);
 135
 136         return 0;
 137 }
 138
 139 subsys_initcall(n2100_pci_init);
 140
 141
 142 /*
 143  * N2100 machine initialisation.
 144  */
 145 static struct physmap_flash_data n2100_flash_data = {
 146         .width          = 2,
 147 };
 148
 149 static struct resource n2100_flash_resource = {
 150         .start          = 0xf0000000,
 151         .end            = 0xf0ffffff,
 152         .flags          = IORESOURCE_MEM,
 153 };
 154
 155 static struct platform_device n2100_flash_device = {
 156         .name           = "physmap-flash",
 157         .id             = 0,
 158         .dev            = {
 159                 .platform_data  = &n2100_flash_data,
 160         },
 161         .num_resources  = 1,
 162         .resource       = &n2100_flash_resource,
 163 };
 164
 165
 166 static struct plat_serial8250_port n2100_serial_port[] = {
 167         {
 168                 .mapbase        = N2100_UART,
 169                 .membase        = (char *)N2100_UART,
 170                 .irq            = 0,
 171                 .flags          = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
 172                 .iotype         = UPIO_MEM,
 173                 .regshift       = 0,
 174                 .uartclk        = 1843200,
 175         },
 176         { },
 177 };
 178
 179 static struct resource n2100_uart_resource = {
 180         .start          = N2100_UART,
 181         .end            = N2100_UART + 7,
 182         .flags          = IORESOURCE_MEM,
 183 };
 184
 185 static struct platform_device n2100_serial_device = {
 186         .name           = "serial8250",
 187         .id             = PLAT8250_DEV_PLATFORM,
 188         .dev            = {
 189                 .platform_data          = n2100_serial_port,
 190         },
 191         .num_resources  = 1,
 192         .resource       = &n2100_uart_resource,
 193 };
 194
 195 static struct f75375s_platform_data n2100_f75375s = {
 196         .pwm            = { 255, 255 },
 197         .pwm_enable = { 0, 0 },
 198 };
 199
 200 static struct pca9532_platform_data n2100_leds = {
 201         .leds = {
 202         {       .name = "n2100:red:satafail0",
 203                 .state = PCA9532_OFF,
 204                 .type = PCA9532_TYPE_LED,
 205         },
 206         {       .name = "n2100:red:satafail1",
 207                 .state = PCA9532_OFF,
 208                 .type = PCA9532_TYPE_LED,
 209         },
 210         {       .name = "n2100:blue:usb",
 211                 .state = PCA9532_OFF,
 212                 .type = PCA9532_TYPE_LED,
 213         },
 214         {       .type = PCA9532_TYPE_NONE },
 215
 216         {       .type = PCA9532_TYPE_NONE },
 217         {       .type = PCA9532_TYPE_NONE },
 218         {       .type = PCA9532_TYPE_NONE },
 219         {       .name = "n2100:red:usb",
 220                 .state = PCA9532_OFF,
 221                 .type = PCA9532_TYPE_LED,
 222         },
 223
 224         {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
 225         {       .type = PCA9532_TYPE_NONE }, /* reset gpio */
 226         {       .type = PCA9532_TYPE_NONE },
 227         {       .type = PCA9532_TYPE_NONE },
 228
 229         {       .type = PCA9532_TYPE_NONE },
 230         {       .name = "n2100:orange:system",
 231                 .state = PCA9532_OFF,
 232                 .type = PCA9532_TYPE_LED,
 233         },
 234         {       .name = "n2100:red:system",
 235                 .state = PCA9532_OFF,
 236                 .type = PCA9532_TYPE_LED,
 237         },
 238         {       .name = "N2100 beeper"  ,
 239                 .state =  PCA9532_OFF,
 240                 .type = PCA9532_TYPE_N2100_BEEP,
 241         },
 242         },
 243         .psc = { 0, 0 },
 244         .pwm = { 0, 0 },
 245 };
 246
 247 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 248         {
 249                 I2C_BOARD_INFO("rs5c372b", 0x32),
 250         },
 251         {
 252                 I2C_BOARD_INFO("f75375", 0x2e),
 253                 .platform_data = &n2100_f75375s,
 254         },
 255         {
 256                 I2C_BOARD_INFO("pca9532", 0x60),
 257                 .platform_data = &n2100_leds,
 258         },
 259 };
 260
 261 /*
 262  * Pull PCA9532 GPIO #8 low to power off the machine.
 263  */
 264 static void n2100_power_off(void)
 265 {
 266         local_irq_disable();
 267
 268         /* Start condition, I2C address of PCA9532, write transaction.  */
 269         *IOP3XX_IDBR0 = 0xc0;
 270         *IOP3XX_ICR0 = 0xe9;
 271         mdelay(1);
 272
 273         /* Write address 0x08.  */
 274         *IOP3XX_IDBR0 = 0x08;
 275         *IOP3XX_ICR0 = 0xe8;
 276         mdelay(1);
 277
 278         /* Write data 0x01, stop condition.  */
 279         *IOP3XX_IDBR0 = 0x01;
 280         *IOP3XX_ICR0 = 0xea;
 281
 282         while (1)
 283                 ;
 284 }
 285
 286 static void n2100_restart(enum reboot_mode mode, const char *cmd)
 287 {
 288         int ret;
 289
 290         ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
 291         if (ret) {
 292                 pr_crit("could not drive reset GPIO low\n");
 293                 return;
 294         }
 295         /* Wait for reset to happen */
 296         while (1)
 297                 ;
 298 }
 299
 300
 301 static struct timer_list power_button_poll_timer;
 302
 303 static void power_button_poll(struct timer_list *unused)
 304 {
 305         if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
 306                 ctrl_alt_del();
 307                 return;
 308         }
 309
 310         power_button_poll_timer.expires = jiffies + (HZ / 10);
 311         add_timer(&power_button_poll_timer);
 312 }
 313
 314 static int __init n2100_request_gpios(void)
 315 {
 316         int ret;
 317
 318         if (!machine_is_n2100())
 319                 return 0;
 320
 321         ret = gpio_request(N2100_HARDWARE_RESET, "reset");
 322         if (ret)
 323                 pr_err("could not request reset GPIO\n");
 324
 325         ret = gpio_request(N2100_POWER_BUTTON, "power");
 326         if (ret)
 327                 pr_err("could not request power GPIO\n");
 328         else {
 329                 ret = gpio_direction_input(N2100_POWER_BUTTON);
 330                 if (ret)
 331                         pr_err("could not set power GPIO as input\n");
 332         }
 333         /* Set up power button poll timer */
 334         timer_setup(&power_button_poll_timer, power_button_poll, 0);
 335         power_button_poll_timer.expires = jiffies + (HZ / 10);
 336         add_timer(&power_button_poll_timer);
 337         return 0;
 338 }
 339 device_initcall(n2100_request_gpios);
 340
 341 static void __init n2100_init_machine(void)
 342 {
 343         register_iop32x_gpio();
 344         platform_device_register(&iop3xx_i2c0_device);
 345         platform_device_register(&n2100_flash_device);
 346         platform_device_register(&n2100_serial_device);
 347         platform_device_register(&iop3xx_dma_0_channel);
 348         platform_device_register(&iop3xx_dma_1_channel);
 349
 350         i2c_register_board_info(0, n2100_i2c_devices,
 351                 ARRAY_SIZE(n2100_i2c_devices));
 352
 353         pm_power_off = n2100_power_off;
 354 }
 355
 356 MACHINE_START(N2100, "Thecus N2100")
 357         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 358         .atag_offset    = 0x100,
 359         .map_io         = n2100_map_io,
 360         .init_irq       = iop32x_init_irq,
 361         .init_time      = n2100_timer_init,
 362         .init_machine   = n2100_init_machine,
 363         .restart        = n2100_restart,
 364 MACHINE_END