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 <linux/gpio/machine.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
  40 #include "hardware.h"
  41 #include "irqs.h"
  42 #include "gpio-iop32x.h"
  43
  44 /*
  45  * N2100 timer tick configuration.
  46  */
  47 static void __init n2100_timer_init(void)
  48 {
  49         /* 33.000 MHz crystal.  */
  50         iop_init_time(198000000);
  51 }
  52
  53
  54 /*
  55  * N2100 I/O.
  56  */
  57 static struct map_desc n2100_io_desc[] __initdata = {
  58         {       /* on-board devices */
  59                 .virtual        = N2100_UART,
  60                 .pfn            = __phys_to_pfn(N2100_UART),
  61                 .length         = 0x00100000,
  62                 .type           = MT_DEVICE
  63         },
  64 };
  65
  66 void __init n2100_map_io(void)
  67 {
  68         iop3xx_map_io();
  69         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
  70 }
  71
  72
  73 /*
  74  * N2100 PCI.
  75  */
  76 static int n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  77 {
  78         int irq;
  79
  80         if (PCI_SLOT(dev->devfn) == 1) {
  81                 /* RTL8110SB #1 */
  82                 irq = IRQ_IOP32X_XINT0;
  83         } else if (PCI_SLOT(dev->devfn) == 2) {
  84                 /* RTL8110SB #2 */
  85                 irq = IRQ_IOP32X_XINT3;
  86         } else if (PCI_SLOT(dev->devfn) == 3) {
  87                 /* Sil3512 */
  88                 irq = IRQ_IOP32X_XINT2;
  89         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
  90                 /* VT6212 INTA */
  91                 irq = IRQ_IOP32X_XINT1;
  92         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
  93                 /* VT6212 INTB */
  94                 irq = IRQ_IOP32X_XINT0;
  95         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
  96                 /* VT6212 INTC */
  97                 irq = IRQ_IOP32X_XINT2;
  98         } else if (PCI_SLOT(dev->devfn) == 5) {
  99                 /* Mini-PCI slot */
 100                 irq = IRQ_IOP32X_XINT3;
 101         } else {
 102                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
 103                         "device PCI:%d:%d:%d\n", dev->bus->number,
 104                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 105                 irq = -1;
 106         }
 107
 108         return irq;
 109 }
 110
 111 static struct hw_pci n2100_pci __initdata = {
 112         .nr_controllers = 1,
 113         .ops            = &iop3xx_ops,
 114         .setup          = iop3xx_pci_setup,
 115         .preinit        = iop3xx_pci_preinit,
 116         .map_irq        = n2100_pci_map_irq,
 117 };
 118
 119 /*
 120  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 121  * the ->broken_parity_status flag for both ports so that the r8169
 122  * driver knows it should ignore error interrupts.
 123  */
 124 static void n2100_fixup_r8169(struct pci_dev *dev)
 125 {
 126         if (dev->bus->number == 0 &&
 127             (dev->devfn == PCI_DEVFN(1, 0) ||
 128              dev->devfn == PCI_DEVFN(2, 0)))
 129                 dev->broken_parity_status = 1;
 130 }
 131 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
 132
 133 static int __init n2100_pci_init(void)
 134 {
 135         if (machine_is_n2100())
 136                 pci_common_init(&n2100_pci);
 137
 138         return 0;
 139 }
 140
 141 subsys_initcall(n2100_pci_init);
 142
 143
 144 /*
 145  * N2100 machine initialisation.
 146  */
 147 static struct physmap_flash_data n2100_flash_data = {
 148         .width          = 2,
 149 };
 150
 151 static struct resource n2100_flash_resource = {
 152         .start          = 0xf0000000,
 153         .end            = 0xf0ffffff,
 154         .flags          = IORESOURCE_MEM,
 155 };
 156
 157 static struct platform_device n2100_flash_device = {
 158         .name           = "physmap-flash",
 159         .id             = 0,
 160         .dev            = {
 161                 .platform_data  = &n2100_flash_data,
 162         },
 163         .num_resources  = 1,
 164         .resource       = &n2100_flash_resource,
 165 };
 166
 167
 168 static struct plat_serial8250_port n2100_serial_port[] = {
 169         {
 170                 .mapbase        = N2100_UART,
 171                 .membase        = (char *)N2100_UART,
 172                 .irq            = 0,
 173                 .flags          = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
 174                 .iotype         = UPIO_MEM,
 175                 .regshift       = 0,
 176                 .uartclk        = 1843200,
 177         },
 178         { },
 179 };
 180
 181 static struct resource n2100_uart_resource = {
 182         .start          = N2100_UART,
 183         .end            = N2100_UART + 7,
 184         .flags          = IORESOURCE_MEM,
 185 };
 186
 187 static struct platform_device n2100_serial_device = {
 188         .name           = "serial8250",
 189         .id             = PLAT8250_DEV_PLATFORM,
 190         .dev            = {
 191                 .platform_data          = n2100_serial_port,
 192         },
 193         .num_resources  = 1,
 194         .resource       = &n2100_uart_resource,
 195 };
 196
 197 static struct f75375s_platform_data n2100_f75375s = {
 198         .pwm            = { 255, 255 },
 199         .pwm_enable = { 0, 0 },
 200 };
 201
 202 static struct pca9532_platform_data n2100_leds = {
 203         .leds = {
 204         {       .name = "n2100:red:satafail0",
 205                 .state = PCA9532_OFF,
 206                 .type = PCA9532_TYPE_LED,
 207         },
 208         {       .name = "n2100:red:satafail1",
 209                 .state = PCA9532_OFF,
 210                 .type = PCA9532_TYPE_LED,
 211         },
 212         {       .name = "n2100:blue:usb",
 213                 .state = PCA9532_OFF,
 214                 .type = PCA9532_TYPE_LED,
 215         },
 216         {       .type = PCA9532_TYPE_NONE },
 217
 218         {       .type = PCA9532_TYPE_NONE },
 219         {       .type = PCA9532_TYPE_NONE },
 220         {       .type = PCA9532_TYPE_NONE },
 221         {       .name = "n2100:red:usb",
 222                 .state = PCA9532_OFF,
 223                 .type = PCA9532_TYPE_LED,
 224         },
 225
 226         {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
 227         {       .type = PCA9532_TYPE_NONE }, /* reset gpio */
 228         {       .type = PCA9532_TYPE_NONE },
 229         {       .type = PCA9532_TYPE_NONE },
 230
 231         {       .type = PCA9532_TYPE_NONE },
 232         {       .name = "n2100:orange:system",
 233                 .state = PCA9532_OFF,
 234                 .type = PCA9532_TYPE_LED,
 235         },
 236         {       .name = "n2100:red:system",
 237                 .state = PCA9532_OFF,
 238                 .type = PCA9532_TYPE_LED,
 239         },
 240         {       .name = "N2100 beeper"  ,
 241                 .state =  PCA9532_OFF,
 242                 .type = PCA9532_TYPE_N2100_BEEP,
 243         },
 244         },
 245         .psc = { 0, 0 },
 246         .pwm = { 0, 0 },
 247 };
 248
 249 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
 250         {
 251                 I2C_BOARD_INFO("rs5c372b", 0x32),
 252         },
 253         {
 254                 I2C_BOARD_INFO("f75375", 0x2e),
 255                 .platform_data = &n2100_f75375s,
 256         },
 257         {
 258                 I2C_BOARD_INFO("pca9532", 0x60),
 259                 .platform_data = &n2100_leds,
 260         },
 261 };
 262
 263 /*
 264  * Pull PCA9532 GPIO #8 low to power off the machine.
 265  */
 266 static void n2100_power_off(void)
 267 {
 268         local_irq_disable();
 269
 270         /* Start condition, I2C address of PCA9532, write transaction.  */
 271         *IOP3XX_IDBR0 = 0xc0;
 272         *IOP3XX_ICR0 = 0xe9;
 273         mdelay(1);
 274
 275         /* Write address 0x08.  */
 276         *IOP3XX_IDBR0 = 0x08;
 277         *IOP3XX_ICR0 = 0xe8;
 278         mdelay(1);
 279
 280         /* Write data 0x01, stop condition.  */
 281         *IOP3XX_IDBR0 = 0x01;
 282         *IOP3XX_ICR0 = 0xea;
 283
 284         while (1)
 285                 ;
 286 }
 287
 288 static void n2100_restart(enum reboot_mode mode, const char *cmd)
 289 {
 290         int ret;
 291
 292         ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
 293         if (ret) {
 294                 pr_crit("could not drive reset GPIO low\n");
 295                 return;
 296         }
 297         /* Wait for reset to happen */
 298         while (1)
 299                 ;
 300 }
 301
 302
 303 static struct timer_list power_button_poll_timer;
 304
 305 static void power_button_poll(struct timer_list *unused)
 306 {
 307         if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
 308                 ctrl_alt_del();
 309                 return;
 310         }
 311
 312         power_button_poll_timer.expires = jiffies + (HZ / 10);
 313         add_timer(&power_button_poll_timer);
 314 }
 315
 316 static int __init n2100_request_gpios(void)
 317 {
 318         int ret;
 319
 320         if (!machine_is_n2100())
 321                 return 0;
 322
 323         ret = gpio_request(N2100_HARDWARE_RESET, "reset");
 324         if (ret)
 325                 pr_err("could not request reset GPIO\n");
 326
 327         ret = gpio_request(N2100_POWER_BUTTON, "power");
 328         if (ret)
 329                 pr_err("could not request power GPIO\n");
 330         else {
 331                 ret = gpio_direction_input(N2100_POWER_BUTTON);
 332                 if (ret)
 333                         pr_err("could not set power GPIO as input\n");
 334         }
 335         /* Set up power button poll timer */
 336         timer_setup(&power_button_poll_timer, power_button_poll, 0);
 337         power_button_poll_timer.expires = jiffies + (HZ / 10);
 338         add_timer(&power_button_poll_timer);
 339         return 0;
 340 }
 341 device_initcall(n2100_request_gpios);
 342
 343 static void __init n2100_init_machine(void)
 344 {
 345         register_iop32x_gpio();
 346         gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
 347         platform_device_register(&iop3xx_i2c0_device);
 348         platform_device_register(&n2100_flash_device);
 349         platform_device_register(&n2100_serial_device);
 350         platform_device_register(&iop3xx_dma_0_channel);
 351         platform_device_register(&iop3xx_dma_1_channel);
 352
 353         i2c_register_board_info(0, n2100_i2c_devices,
 354                 ARRAY_SIZE(n2100_i2c_devices));
 355
 356         pm_power_off = n2100_power_off;
 357 }
 358
 359 MACHINE_START(N2100, "Thecus N2100")
 360         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
 361         .atag_offset    = 0x100,
 362         .map_io         = n2100_map_io,
 363         .init_irq       = iop32x_init_irq,
 364         .init_time      = n2100_timer_init,
 365         .init_machine   = n2100_init_machine,
 366         .restart        = n2100_restart,
 367 MACHINE_END