arch/mips/ath79/dev-common.c

   1 /*
   2  *  Atheros AR71XX/AR724X/AR913X common devices
   3  *
   4  *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Parts of this file are based on Atheros' 2.6.15 BSP
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/platform_data/gpio-ath79.h>
  18 #include <linux/serial_8250.h>
  19 #include <linux/clk.h>
  20 #include <linux/err.h>
  21
  22 #include <asm/mach-ath79/ath79.h>
  23 #include <asm/mach-ath79/ar71xx_regs.h>
  24 #include "common.h"
  25 #include "dev-common.h"
  26
  27 static struct resource ath79_uart_resources[] = {
  28         {
  29                 .start  = AR71XX_UART_BASE,
  30                 .end    = AR71XX_UART_BASE + AR71XX_UART_SIZE - 1,
  31                 .flags  = IORESOURCE_MEM,
  32         },
  33 };
  34
  35 #define AR71XX_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
  36 static struct plat_serial8250_port ath79_uart_data[] = {
  37         {
  38                 .mapbase        = AR71XX_UART_BASE,
  39                 .irq            = ATH79_MISC_IRQ(3),
  40                 .flags          = AR71XX_UART_FLAGS,
  41                 .iotype         = UPIO_MEM32,
  42                 .regshift       = 2,
  43         }, {
  44                 /* terminating entry */
  45         }
  46 };
  47
  48 static struct platform_device ath79_uart_device = {
  49         .name           = "serial8250",
  50         .id             = PLAT8250_DEV_PLATFORM,
  51         .resource       = ath79_uart_resources,
  52         .num_resources  = ARRAY_SIZE(ath79_uart_resources),
  53         .dev = {
  54                 .platform_data  = ath79_uart_data
  55         },
  56 };
  57
  58 static struct resource ar933x_uart_resources[] = {
  59         {
  60                 .start  = AR933X_UART_BASE,
  61                 .end    = AR933X_UART_BASE + AR71XX_UART_SIZE - 1,
  62                 .flags  = IORESOURCE_MEM,
  63         },
  64         {
  65                 .start  = ATH79_MISC_IRQ(3),
  66                 .end    = ATH79_MISC_IRQ(3),
  67                 .flags  = IORESOURCE_IRQ,
  68         },
  69 };
  70
  71 static struct platform_device ar933x_uart_device = {
  72         .name           = "ar933x-uart",
  73         .id             = -1,
  74         .resource       = ar933x_uart_resources,
  75         .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
  76 };
  77
  78 void __init ath79_register_uart(void)
  79 {
  80         unsigned long uart_clk_rate;
  81
  82         uart_clk_rate = ath79_get_sys_clk_rate("uart");
  83
  84         if (soc_is_ar71xx() ||
  85             soc_is_ar724x() ||
  86             soc_is_ar913x() ||
  87             soc_is_ar934x() ||
  88             soc_is_qca955x()) {
  89                 ath79_uart_data[0].uartclk = uart_clk_rate;
  90                 platform_device_register(&ath79_uart_device);
  91         } else if (soc_is_ar933x()) {
  92                 platform_device_register(&ar933x_uart_device);
  93         } else {
  94                 BUG();
  95         }
  96 }
  97
  98 void __init ath79_register_wdt(void)
  99 {
 100         struct resource res;
 101
 102         memset(&res, 0, sizeof(res));
 103
 104         res.flags = IORESOURCE_MEM;
 105         res.start = AR71XX_RESET_BASE + AR71XX_RESET_REG_WDOG_CTRL;
 106         res.end = res.start + 0x8 - 1;
 107
 108         platform_device_register_simple("ath79-wdt", -1, &res, 1);
 109 }
 110
 111 static struct ath79_gpio_platform_data ath79_gpio_pdata;
 112
 113 static struct resource ath79_gpio_resources[] = {
 114         {
 115                 .flags = IORESOURCE_MEM,
 116                 .start = AR71XX_GPIO_BASE,
 117                 .end = AR71XX_GPIO_BASE + AR71XX_GPIO_SIZE - 1,
 118         },
 119         {
 120                 .start  = ATH79_MISC_IRQ(2),
 121                 .end    = ATH79_MISC_IRQ(2),
 122                 .flags  = IORESOURCE_IRQ,
 123         },
 124 };
 125
 126 static struct platform_device ath79_gpio_device = {
 127         .name           = "ath79-gpio",
 128         .id             = -1,
 129         .resource       = ath79_gpio_resources,
 130         .num_resources  = ARRAY_SIZE(ath79_gpio_resources),
 131         .dev = {
 132                 .platform_data  = &ath79_gpio_pdata
 133         },
 134 };
 135
 136 void __init ath79_gpio_init(void)
 137 {
 138         if (soc_is_ar71xx()) {
 139                 ath79_gpio_pdata.ngpios = AR71XX_GPIO_COUNT;
 140         } else if (soc_is_ar7240()) {
 141                 ath79_gpio_pdata.ngpios = AR7240_GPIO_COUNT;
 142         } else if (soc_is_ar7241() || soc_is_ar7242()) {
 143                 ath79_gpio_pdata.ngpios = AR7241_GPIO_COUNT;
 144         } else if (soc_is_ar913x()) {
 145                 ath79_gpio_pdata.ngpios = AR913X_GPIO_COUNT;
 146         } else if (soc_is_ar933x()) {
 147                 ath79_gpio_pdata.ngpios = AR933X_GPIO_COUNT;
 148         } else if (soc_is_ar934x()) {
 149                 ath79_gpio_pdata.ngpios = AR934X_GPIO_COUNT;
 150                 ath79_gpio_pdata.oe_inverted = 1;
 151         } else if (soc_is_qca955x()) {
 152                 ath79_gpio_pdata.ngpios = QCA955X_GPIO_COUNT;
 153                 ath79_gpio_pdata.oe_inverted = 1;
 154         } else {
 155                 BUG();
 156         }
 157
 158         platform_device_register(&ath79_gpio_device);
 159 }