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