arch/arm/mach-omap/board-voiceblue.c

   1 /*
   2  * linux/arch/arm/mach-omap/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/device.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/init.h>
  19 #include <linux/kernel.h>
  20 #include <linux/notifier.h>
  21 #include <linux/reboot.h>
  22 #include <linux/serial_8250.h>
  23 #include <linux/serial_reg.h>
  24
  25 #include <asm/hardware.h>
  26 #include <asm/mach-types.h>
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/map.h>
  29
  30 #include <asm/arch/gpio.h>
  31 #include <asm/arch/tc.h>
  32 #include <asm/arch/mux.h>
  33 #include <asm/arch/usb.h>
  34
  35 #include "common.h"
  36
  37 extern void omap_init_time(void);
  38 extern int omap_gpio_init(void);
  39
  40 static struct plat_serial8250_port voiceblue_ports[] = {
  41         {
  42                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x40000),
  43                 .irq            = OMAP_GPIO_IRQ(12),
  44                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  45                 .iotype         = UPIO_MEM,
  46                 .regshift       = 1,
  47                 .uartclk        = 3686400,
  48         },
  49         {
  50                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x50000),
  51                 .irq            = OMAP_GPIO_IRQ(13),
  52                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  53                 .iotype         = UPIO_MEM,
  54                 .regshift       = 1,
  55                 .uartclk        = 3686400,
  56         },
  57         {
  58                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x60000),
  59                 .irq            = OMAP_GPIO_IRQ(14),
  60                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  61                 .iotype         = UPIO_MEM,
  62                 .regshift       = 1,
  63                 .uartclk        = 3686400,
  64         },
  65         {
  66                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x70000),
  67                 .irq            = OMAP_GPIO_IRQ(15),
  68                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  69                 .iotype         = UPIO_MEM,
  70                 .regshift       = 1,
  71                 .uartclk        = 3686400,
  72         },
  73         { },
  74 };
  75
  76 static struct platform_device serial_device = {
  77         .name                   = "serial8250",
  78         .id                     = 1,
  79         .dev                    = {
  80                 .platform_data  = voiceblue_ports,
  81         },
  82 };
  83
  84 static int __init ext_uart_init(void)
  85 {
  86         return platform_device_register(&serial_device);
  87 }
  88 arch_initcall(ext_uart_init);
  89
  90 static struct resource voiceblue_smc91x_resources[] = {
  91         [0] = {
  92                 .start  = OMAP_CS2_PHYS + 0x300,
  93                 .end    = OMAP_CS2_PHYS + 0x300 + 16,
  94                 .flags  = IORESOURCE_MEM,
  95         },
  96         [1] = {
  97                 .start  = OMAP_GPIO_IRQ(8),
  98                 .end    = OMAP_GPIO_IRQ(8),
  99                 .flags  = IORESOURCE_IRQ,
 100         },
 101 };
 102
 103 static struct platform_device voiceblue_smc91x_device = {
 104         .name           = "smc91x",
 105         .id             = 0,
 106         .num_resources  = ARRAY_SIZE(voiceblue_smc91x_resources),
 107         .resource       = voiceblue_smc91x_resources,
 108 };
 109
 110 static struct platform_device *voiceblue_devices[] __initdata = {
 111         &voiceblue_smc91x_device,
 112 };
 113
 114 static struct omap_usb_config voiceblue_usb_config __initdata = {
 115         .hmc_mode       = 3,
 116         .register_host  = 1,
 117         .register_dev   = 1,
 118         .pins[0]        = 2,
 119         .pins[1]        = 6,
 120         .pins[2]        = 6,
 121 };
 122
 123 static struct omap_board_config_kernel voiceblue_config[] = {
 124         { OMAP_TAG_USB, &voiceblue_usb_config },
 125 };
 126
 127 static void __init voiceblue_init_irq(void)
 128 {
 129         omap_init_irq();
 130         omap_gpio_init();
 131 }
 132
 133 static void __init voiceblue_init(void)
 134 {
 135         /* There is a good chance board is going up, so enable Power LED
 136          * (it is connected through invertor) */
 137         omap_writeb(0x00, OMAP_LPG1_LCR);
 138         /* Watchdog */
 139         omap_request_gpio(0);
 140         /* smc91x reset */
 141         omap_request_gpio(7);
 142         omap_set_gpio_direction(7, 0);
 143         omap_set_gpio_dataout(7, 1);
 144         udelay(2);      /* wait at least 100ns */
 145         omap_set_gpio_dataout(7, 0);
 146         mdelay(50);     /* 50ms until PHY ready */
 147         /* smc91x interrupt pin */
 148         omap_request_gpio(8);
 149         omap_set_gpio_edge_ctrl(8, OMAP_GPIO_RISING_EDGE);
 150         /* 16C554 reset*/
 151         omap_request_gpio(6);
 152         omap_set_gpio_direction(6, 0);
 153         omap_set_gpio_dataout(6, 0);
 154         /* 16C554 interrupt pins */
 155         omap_request_gpio(12);
 156         omap_request_gpio(13);
 157         omap_request_gpio(14);
 158         omap_request_gpio(15);
 159         omap_set_gpio_edge_ctrl(12, OMAP_GPIO_RISING_EDGE);
 160         omap_set_gpio_edge_ctrl(13, OMAP_GPIO_RISING_EDGE);
 161         omap_set_gpio_edge_ctrl(14, OMAP_GPIO_RISING_EDGE);
 162         omap_set_gpio_edge_ctrl(15, OMAP_GPIO_RISING_EDGE);
 163
 164         platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
 165         omap_board_config = voiceblue_config;
 166         omap_board_config_size = ARRAY_SIZE(voiceblue_config);
 167 }
 168
 169 static int __initdata omap_serial_ports[OMAP_MAX_NR_PORTS] = {1, 1, 1};
 170
 171 static void __init voiceblue_map_io(void)
 172 {
 173         omap_map_io();
 174         omap_serial_init(omap_serial_ports);
 175 }
 176
 177 #define MACHINE_PANICED         1
 178 #define MACHINE_REBOOTING       2
 179 #define MACHINE_REBOOT          4
 180 static unsigned long machine_state;
 181
 182 static int panic_event(struct notifier_block *this, unsigned long event,
 183          void *ptr)
 184 {
 185         if (test_and_set_bit(MACHINE_PANICED, &machine_state))
 186                 return NOTIFY_DONE;
 187
 188         /* Flash Power LED
 189          * (TODO: Enable clock right way (enabled in bootloader already)) */
 190         omap_writeb(0x78, OMAP_LPG1_LCR);
 191
 192         return NOTIFY_DONE;
 193 }
 194
 195 static struct notifier_block panic_block = {
 196         .notifier_call  = panic_event,
 197 };
 198
 199 static int __init setup_notifier(void)
 200 {
 201         /* Setup panic notifier */
 202         notifier_chain_register(&panic_notifier_list, &panic_block);
 203
 204         return 0;
 205 }
 206
 207 postcore_initcall(setup_notifier);
 208
 209 static int wdt_gpio_state;
 210
 211 void voiceblue_wdt_enable(void)
 212 {
 213         omap_set_gpio_direction(0, 0);
 214         omap_set_gpio_dataout(0, 0);
 215         omap_set_gpio_dataout(0, 1);
 216         omap_set_gpio_dataout(0, 0);
 217         wdt_gpio_state = 0;
 218 }
 219
 220 void voiceblue_wdt_disable(void)
 221 {
 222         omap_set_gpio_dataout(0, 0);
 223         omap_set_gpio_dataout(0, 1);
 224         omap_set_gpio_dataout(0, 0);
 225         omap_set_gpio_direction(0, 1);
 226 }
 227
 228 void voiceblue_wdt_ping(void)
 229 {
 230         if (test_bit(MACHINE_REBOOT, &machine_state))
 231                 return;
 232
 233         wdt_gpio_state = !wdt_gpio_state;
 234         omap_set_gpio_dataout(0, wdt_gpio_state);
 235 }
 236
 237 void voiceblue_reset(void)
 238 {
 239         set_bit(MACHINE_REBOOT, &machine_state);
 240         voiceblue_wdt_enable();
 241         while (1) ;
 242 }
 243
 244 EXPORT_SYMBOL(voiceblue_wdt_enable);
 245 EXPORT_SYMBOL(voiceblue_wdt_disable);
 246 EXPORT_SYMBOL(voiceblue_wdt_ping);
 247
 248 MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
 249         MAINTAINER("Ladislav Michl <michl@2n.cz>")
 250         BOOT_MEM(0x10000000, 0xfff00000, 0xfef00000)
 251         BOOT_PARAMS(0x10000100)
 252         MAPIO(voiceblue_map_io)
 253         INITIRQ(voiceblue_init_irq)
 254         INIT_MACHINE(voiceblue_init)
 255         .timer = &omap_timer,
 256 MACHINE_END