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/gpio.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/irq.h>
  20 #include <linux/init.h>
  21 #include <linux/kernel.h>
  22 #include <linux/mtd/physmap.h>
  23 #include <linux/notifier.h>
  24 #include <linux/reboot.h>
  25 #include <linux/serial_8250.h>
  26 #include <linux/serial_reg.h>
  27 #include <linux/smc91x.h>
  28 #include <linux/export.h>
  29 #include <linux/reboot.h>
  30
  31 #include <asm/mach-types.h>
  32 #include <asm/mach/arch.h>
  33 #include <asm/mach/map.h>
  34
  35 #include <mach/board-voiceblue.h>
  36 #include <mach/flash.h>
  37 #include <mach/mux.h>
  38 #include <mach/tc.h>
  39
  40 #include <mach/hardware.h>
  41 #include <mach/usb.h>
  42
  43 #include "common.h"
  44
  45 static struct plat_serial8250_port voiceblue_ports[] = {
  46         {
  47                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x40000),
  48                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  49                 .iotype         = UPIO_MEM,
  50                 .regshift       = 1,
  51                 .uartclk        = 3686400,
  52         },
  53         {
  54                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x50000),
  55                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  56                 .iotype         = UPIO_MEM,
  57                 .regshift       = 1,
  58                 .uartclk        = 3686400,
  59         },
  60         {
  61                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x60000),
  62                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  63                 .iotype         = UPIO_MEM,
  64                 .regshift       = 1,
  65                 .uartclk        = 3686400,
  66         },
  67         {
  68                 .mapbase        = (unsigned long)(OMAP_CS1_PHYS + 0x70000),
  69                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
  70                 .iotype         = UPIO_MEM,
  71                 .regshift       = 1,
  72                 .uartclk        = 3686400,
  73         },
  74         { },
  75 };
  76
  77 static struct platform_device serial_device = {
  78         .name                   = "serial8250",
  79         .id                     = PLAT8250_DEV_PLATFORM1,
  80 };
  81
  82 static int __init ext_uart_init(void)
  83 {
  84         if (!machine_is_voiceblue())
  85                 return -ENODEV;
  86
  87         voiceblue_ports[0].irq = gpio_to_irq(12);
  88         voiceblue_ports[1].irq = gpio_to_irq(13);
  89         voiceblue_ports[2].irq = gpio_to_irq(14);
  90         voiceblue_ports[3].irq = gpio_to_irq(15);
  91         serial_device.dev.platform_data = voiceblue_ports;
  92         return platform_device_register(&serial_device);
  93 }
  94 arch_initcall(ext_uart_init);
  95
  96 static struct physmap_flash_data voiceblue_flash_data = {
  97         .width          = 2,
  98         .set_vpp        = omap1_set_vpp,
  99 };
 100
 101 static struct resource voiceblue_flash_resource = {
 102         .start  = OMAP_CS0_PHYS,
 103         .end    = OMAP_CS0_PHYS + SZ_32M - 1,
 104         .flags  = IORESOURCE_MEM,
 105 };
 106
 107 static struct platform_device voiceblue_flash_device = {
 108         .name           = "physmap-flash",
 109         .id             = 0,
 110         .dev            = {
 111                 .platform_data  = &voiceblue_flash_data,
 112         },
 113         .num_resources  = 1,
 114         .resource       = &voiceblue_flash_resource,
 115 };
 116
 117 static struct smc91x_platdata voiceblue_smc91x_info = {
 118         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 119         .leda   = RPC_LED_100_10,
 120         .ledb   = RPC_LED_TX_RX,
 121 };
 122
 123 static struct resource voiceblue_smc91x_resources[] = {
 124         [0] = {
 125                 .start  = OMAP_CS2_PHYS + 0x300,
 126                 .end    = OMAP_CS2_PHYS + 0x300 + 16,
 127                 .flags  = IORESOURCE_MEM,
 128         },
 129         [1] = {
 130                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 131         },
 132 };
 133
 134 static struct platform_device voiceblue_smc91x_device = {
 135         .name           = "smc91x",
 136         .id             = 0,
 137         .dev    = {
 138                 .platform_data  = &voiceblue_smc91x_info,
 139         },
 140         .num_resources  = ARRAY_SIZE(voiceblue_smc91x_resources),
 141         .resource       = voiceblue_smc91x_resources,
 142 };
 143
 144 static struct platform_device *voiceblue_devices[] __initdata = {
 145         &voiceblue_flash_device,
 146         &voiceblue_smc91x_device,
 147 };
 148
 149 static struct omap_usb_config voiceblue_usb_config __initdata = {
 150         .hmc_mode       = 3,
 151         .register_host  = 1,
 152         .register_dev   = 1,
 153         .pins[0]        = 2,
 154         .pins[1]        = 6,
 155         .pins[2]        = 6,
 156 };
 157
 158 #define MACHINE_PANICED         1
 159 #define MACHINE_REBOOTING       2
 160 #define MACHINE_REBOOT          4
 161 static unsigned long machine_state;
 162
 163 static int panic_event(struct notifier_block *this, unsigned long event,
 164          void *ptr)
 165 {
 166         if (test_and_set_bit(MACHINE_PANICED, &machine_state))
 167                 return NOTIFY_DONE;
 168
 169         /* Flash power LED */
 170         omap_writeb(0x78, OMAP_LPG1_LCR);
 171         omap_writeb(0x01, OMAP_LPG1_PMR);       /* Enable clock */
 172
 173         return NOTIFY_DONE;
 174 }
 175
 176 static struct notifier_block panic_block = {
 177         .notifier_call  = panic_event,
 178 };
 179
 180 static int __init voiceblue_setup(void)
 181 {
 182         if (!machine_is_voiceblue())
 183                 return -ENODEV;
 184
 185         /* Setup panic notifier */
 186         atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
 187
 188         return 0;
 189 }
 190 postcore_initcall(voiceblue_setup);
 191
 192 static int wdt_gpio_state;
 193
 194 void voiceblue_wdt_enable(void)
 195 {
 196         gpio_direction_output(0, 0);
 197         gpio_set_value(0, 1);
 198         gpio_set_value(0, 0);
 199         wdt_gpio_state = 0;
 200 }
 201
 202 void voiceblue_wdt_disable(void)
 203 {
 204         gpio_set_value(0, 0);
 205         gpio_set_value(0, 1);
 206         gpio_set_value(0, 0);
 207         gpio_direction_input(0);
 208 }
 209
 210 void voiceblue_wdt_ping(void)
 211 {
 212         if (test_bit(MACHINE_REBOOT, &machine_state))
 213                 return;
 214
 215         wdt_gpio_state = !wdt_gpio_state;
 216         gpio_set_value(0, wdt_gpio_state);
 217 }
 218
 219 static void voiceblue_restart(enum reboot_mode mode, const char *cmd)
 220 {
 221         /*
 222          * Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
 223          * "Global Software Reset Affects Traffic Controller Frequency".
 224          */
 225         if (cpu_is_omap5912()) {
 226                 omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4), DPLL_CTL);
 227                 omap_writew(0x8, ARM_RSTCT1);
 228         }
 229
 230         set_bit(MACHINE_REBOOT, &machine_state);
 231         voiceblue_wdt_enable();
 232         while (1) ;
 233 }
 234
 235 EXPORT_SYMBOL(voiceblue_wdt_enable);
 236 EXPORT_SYMBOL(voiceblue_wdt_disable);
 237 EXPORT_SYMBOL(voiceblue_wdt_ping);
 238
 239 static void __init voiceblue_init(void)
 240 {
 241         /* mux pins for uarts */
 242         omap_cfg_reg(UART1_TX);
 243         omap_cfg_reg(UART1_RTS);
 244         omap_cfg_reg(UART2_TX);
 245         omap_cfg_reg(UART2_RTS);
 246         omap_cfg_reg(UART3_TX);
 247         omap_cfg_reg(UART3_RX);
 248
 249         /* Watchdog */
 250         gpio_request(0, "Watchdog");
 251         /* smc91x reset */
 252         gpio_request(7, "SMC91x reset");
 253         gpio_direction_output(7, 1);
 254         udelay(2);      /* wait at least 100ns */
 255         gpio_set_value(7, 0);
 256         mdelay(50);     /* 50ms until PHY ready */
 257         /* smc91x interrupt pin */
 258         gpio_request(8, "SMC91x irq");
 259         /* 16C554 reset*/
 260         gpio_request(6, "16C554 reset");
 261         gpio_direction_output(6, 0);
 262         /* 16C554 interrupt pins */
 263         gpio_request(12, "16C554 irq");
 264         gpio_request(13, "16C554 irq");
 265         gpio_request(14, "16C554 irq");
 266         gpio_request(15, "16C554 irq");
 267         irq_set_irq_type(gpio_to_irq(12), IRQ_TYPE_EDGE_RISING);
 268         irq_set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
 269         irq_set_irq_type(gpio_to_irq(14), IRQ_TYPE_EDGE_RISING);
 270         irq_set_irq_type(gpio_to_irq(15), IRQ_TYPE_EDGE_RISING);
 271
 272         voiceblue_smc91x_resources[1].start = gpio_to_irq(8);
 273         voiceblue_smc91x_resources[1].end = gpio_to_irq(8);
 274         platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
 275         omap_serial_init();
 276         omap1_usb_init(&voiceblue_usb_config);
 277         omap_register_i2c_bus(1, 100, NULL, 0);
 278
 279         /* There is a good chance board is going up, so enable power LED
 280          * (it is connected through invertor) */
 281         omap_writeb(0x00, OMAP_LPG1_LCR);
 282         omap_writeb(0x00, OMAP_LPG1_PMR);       /* Disable clock */
 283 }
 284
 285 MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
 286         /* Maintainer: Ladislav Michl <michl@2n.cz> */
 287         .atag_offset    = 0x100,
 288         .map_io         = omap15xx_map_io,
 289         .init_early     = omap1_init_early,
 290         .init_irq       = omap1_init_irq,
 291         .init_machine   = voiceblue_init,
 292         .init_late      = omap1_init_late,
 293         .init_time      = omap1_timer_init,
 294         .restart        = voiceblue_restart,
 295 MACHINE_END