kernel/2.6.29.6-aldebaran-rt/arch/arm/mach-omap1/board-voiceblue.c

   1 /*
   2  * linux/arch/arm/mach-omap1/board-voiceblue.c
   3  *
   4  * Modified from board-generic.c
   5  *
   6  * Copyright (C) 2004 2N Telekomunikace, Ladislav Michl <michl@2n.cz>
   7  *
   8  * Code for OMAP5910 based VoiceBlue board (VoIP to GSM gateway).
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/irq.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/notifier.h>
  22 #include <linux/reboot.h>
  23 #include <linux/serial_8250.h>
  24 #include <linux/serial_reg.h>
  25
  26 #include <mach/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/flash.h>
  30 #include <asm/mach/map.h>
  31
  32 #include <mach/common.h>
  33 #include <mach/gpio.h>
  34 #include <mach/mux.h>
  35 #include <mach/tc.h>
  36 #include <mach/usb.h>
  37
  38 static struct plat_serial8250_port voiceblue_ports[] = {
  39         {
  40                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x40000),
  41                 .irq            = OMAP_GPIO_IRQ(12),
  42                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  43                 .iotype         = UPIO_MEM,
  44                 .regshift       = 1,
  45                 .uartclk        = 3686400,
  46         },
  47         {
  48                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x50000),
  49                 .irq            = OMAP_GPIO_IRQ(13),
  50                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  51                 .iotype         = UPIO_MEM,
  52                 .regshift       = 1,
  53                 .uartclk        = 3686400,
  54         },
  55         {
  56                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x60000),
  57                 .irq            = OMAP_GPIO_IRQ(14),
  58                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  59                 .iotype         = UPIO_MEM,
  60                 .regshift       = 1,
  61                 .uartclk        = 3686400,
  62         },
  63         {
  64                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x70000),
  65                 .irq            = OMAP_GPIO_IRQ(15),
  66                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  67                 .iotype         = UPIO_MEM,
  68                 .regshift       = 1,
  69                 .uartclk        = 3686400,
  70         },
  71         { },
  72 };
  73
  74 static struct platform_device serial_device = {
  75         .name                   = "serial8250",
  76         .id                     = PLAT8250_DEV_PLATFORM1,
  77         .dev                    = {
  78                 .platform_data  = voiceblue_ports,
  79         },
  80 };
  81
  82 static int __init ext_uart_init(void)
  83 {
  84         return platform_device_register(&serial_device);
  85 }
  86 arch_initcall(ext_uart_init);
  87
  88 static struct flash_platform_data voiceblue_flash_data = {
  89         .map_name       = "cfi_probe",
  90         .width          = 2,
  91 };
  92
  93 static struct resource voiceblue_flash_resource = {
  94         .start  = OMAP_CS0_PHYS,
  95         .end    = OMAP_CS0_PHYS + SZ_32M - 1,
  96         .flags  = IORESOURCE_MEM,
  97 };
  98
  99 static struct platform_device voiceblue_flash_device = {
 100         .name           = "omapflash",
 101         .id             = 0,
 102         .dev            = {
 103                 .platform_data  = &voiceblue_flash_data,
 104         },
 105         .num_resources  = 1,
 106         .resource       = &voiceblue_flash_resource,
 107 };
 108
 109 static struct resource voiceblue_smc91x_resources[] = {
 110         [0] = {
 111                 .start  = OMAP_CS2_PHYS + 0x300,
 112                 .end    = OMAP_CS2_PHYS + 0x300 + 16,
 113                 .flags  = IORESOURCE_MEM,
 114         },
 115         [1] = {
 116                 .start  = OMAP_GPIO_IRQ(8),
 117                 .end    = OMAP_GPIO_IRQ(8),
 118                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 119         },
 120 };
 121
 122 static struct platform_device voiceblue_smc91x_device = {
 123         .name           = "smc91x",
 124         .id             = 0,
 125         .num_resources  = ARRAY_SIZE(voiceblue_smc91x_resources),
 126         .resource       = voiceblue_smc91x_resources,
 127 };
 128
 129 static struct platform_device *voiceblue_devices[] __initdata = {
 130         &voiceblue_flash_device,
 131         &voiceblue_smc91x_device,
 132 };
 133
 134 static struct omap_usb_config voiceblue_usb_config __initdata = {
 135         .hmc_mode       = 3,
 136         .register_host  = 1,
 137         .register_dev   = 1,
 138         .pins[0]        = 2,
 139         .pins[1]        = 6,
 140         .pins[2]        = 6,
 141 };
 142
 143 static struct omap_uart_config voiceblue_uart_config __initdata = {
 144         .enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
 145 };
 146
 147 static struct omap_board_config_kernel voiceblue_config[] = {
 148         { OMAP_TAG_USB,  &voiceblue_usb_config },
 149         { OMAP_TAG_UART, &voiceblue_uart_config },
 150 };
 151
 152 static void __init voiceblue_init_irq(void)
 153 {
 154         omap1_init_common_hw();
 155         omap_init_irq();
 156         omap_gpio_init();
 157 }
 158
 159 static void __init voiceblue_init(void)
 160 {
 161         /* Watchdog */
 162         gpio_request(0, "Watchdog");
 163         /* smc91x reset */
 164         gpio_request(7, "SMC91x reset");
 165         gpio_direction_output(7, 1);
 166         udelay(2);      /* wait at least 100ns */
 167         gpio_set_value(7, 0);
 168         mdelay(50);     /* 50ms until PHY ready */
 169         /* smc91x interrupt pin */
 170         gpio_request(8, "SMC91x irq");
 171         /* 16C554 reset*/
 172         gpio_request(6, "16C554 reset");
 173         gpio_direction_output(6, 0);
 174         /* 16C554 interrupt pins */
 175         gpio_request(12, "16C554 irq");
 176         gpio_request(13, "16C554 irq");
 177         gpio_request(14, "16C554 irq");
 178         gpio_request(15, "16C554 irq");
 179         set_irq_type(gpio_to_irq(12), IRQ_TYPE_EDGE_RISING);
 180         set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
 181         set_irq_type(gpio_to_irq(14), IRQ_TYPE_EDGE_RISING);
 182         set_irq_type(gpio_to_irq(15), IRQ_TYPE_EDGE_RISING);
 183
 184         platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
 185         omap_board_config = voiceblue_config;
 186         omap_board_config_size = ARRAY_SIZE(voiceblue_config);
 187         omap_serial_init();
 188         omap_register_i2c_bus(1, 100, NULL, 0);
 189
 190         /* There is a good chance board is going up, so enable power LED
 191          * (it is connected through invertor) */
 192         omap_writeb(0x00, OMAP_LPG1_LCR);
 193         omap_writeb(0x00, OMAP_LPG1_PMR);       /* Disable clock */
 194 }
 195
 196 static void __init voiceblue_map_io(void)
 197 {
 198         omap1_map_common_io();
 199 }
 200
 201 #define MACHINE_PANICED         1
 202 #define MACHINE_REBOOTING       2
 203 #define MACHINE_REBOOT          4
 204 static unsigned long machine_state;
 205
 206 static int panic_event(struct notifier_block *this, unsigned long event,
 207          void *ptr)
 208 {
 209         if (test_and_set_bit(MACHINE_PANICED, &machine_state))
 210                 return NOTIFY_DONE;
 211
 212         /* Flash power LED */
 213         omap_writeb(0x78, OMAP_LPG1_LCR);
 214         omap_writeb(0x01, OMAP_LPG1_PMR);       /* Enable clock */
 215
 216         return NOTIFY_DONE;
 217 }
 218
 219 static struct notifier_block panic_block = {
 220         .notifier_call  = panic_event,
 221 };
 222
 223 static int __init voiceblue_setup(void)
 224 {
 225         /* Setup panic notifier */
 226         atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
 227
 228         return 0;
 229 }
 230 postcore_initcall(voiceblue_setup);
 231
 232 static int wdt_gpio_state;
 233
 234 void voiceblue_wdt_enable(void)
 235 {
 236         gpio_direction_output(0, 0);
 237         gpio_set_value(0, 1);
 238         gpio_set_value(0, 0);
 239         wdt_gpio_state = 0;
 240 }
 241
 242 void voiceblue_wdt_disable(void)
 243 {
 244         gpio_set_value(0, 0);
 245         gpio_set_value(0, 1);
 246         gpio_set_value(0, 0);
 247         gpio_direction_input(0);
 248 }
 249
 250 void voiceblue_wdt_ping(void)
 251 {
 252         if (test_bit(MACHINE_REBOOT, &machine_state))
 253                 return;
 254
 255         wdt_gpio_state = !wdt_gpio_state;
 256         gpio_set_value(0, wdt_gpio_state);
 257 }
 258
 259 void voiceblue_reset(void)
 260 {
 261         set_bit(MACHINE_REBOOT, &machine_state);
 262         voiceblue_wdt_enable();
 263         while (1) ;
 264 }
 265
 266 EXPORT_SYMBOL(voiceblue_wdt_enable);
 267 EXPORT_SYMBOL(voiceblue_wdt_disable);
 268 EXPORT_SYMBOL(voiceblue_wdt_ping);
 269
 270 MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
 271         /* Maintainer: Ladislav Michl <michl@2n.cz> */
 272         .phys_io        = 0xfff00000,
 273         .io_pg_offst    = ((0xfef00000) >> 18) & 0xfffc,
 274         .boot_params    = 0x10000100,
 275         .map_io         = voiceblue_map_io,
 276         .init_irq       = voiceblue_init_irq,
 277         .init_machine   = voiceblue_init,
 278         .timer          = &omap_timer,
 279 MACHINE_END