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/serial_8250.h>
  18 #include <linux/clk.h>
  19 #include <linux/err.h>
  20
  21 #include <asm/mach-ath79/ath79.h>
  22 #include <asm/mach-ath79/ar71xx_regs.h>
  23 #include "common.h"
  24 #include "dev-common.h"
  25
  26 static struct resource ath79_uart_resources[] = {
  27         {
  28                 .start  = AR71XX_UART_BASE,
  29                 .end    = AR71XX_UART_BASE + AR71XX_UART_SIZE - 1,
  30                 .flags  = IORESOURCE_MEM,
  31         },
  32 };
  33
  34 #define AR71XX_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
  35 static struct plat_serial8250_port ath79_uart_data[] = {
  36         {
  37                 .mapbase        = AR71XX_UART_BASE,
  38                 .irq            = ATH79_MISC_IRQ(3),
  39                 .flags          = AR71XX_UART_FLAGS,
  40                 .iotype         = UPIO_MEM32,
  41                 .regshift       = 2,
  42         }, {
  43                 /* terminating entry */
  44         }
  45 };
  46
  47 static struct platform_device ath79_uart_device = {
  48         .name           = "serial8250",
  49         .id             = PLAT8250_DEV_PLATFORM,
  50         .resource       = ath79_uart_resources,
  51         .num_resources  = ARRAY_SIZE(ath79_uart_resources),
  52         .dev = {
  53                 .platform_data  = ath79_uart_data
  54         },
  55 };
  56
  57 static struct resource ar933x_uart_resources[] = {
  58         {
  59                 .start  = AR933X_UART_BASE,
  60                 .end    = AR933X_UART_BASE + AR71XX_UART_SIZE - 1,
  61                 .flags  = IORESOURCE_MEM,
  62         },
  63         {
  64                 .start  = ATH79_MISC_IRQ(3),
  65                 .end    = ATH79_MISC_IRQ(3),
  66                 .flags  = IORESOURCE_IRQ,
  67         },
  68 };
  69
  70 static struct platform_device ar933x_uart_device = {
  71         .name           = "ar933x-uart",
  72         .id             = -1,
  73         .resource       = ar933x_uart_resources,
  74         .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
  75 };
  76
  77 void __init ath79_register_uart(void)
  78 {
  79         unsigned long uart_clk_rate;
  80
  81         uart_clk_rate = ath79_get_sys_clk_rate("uart");
  82
  83         if (soc_is_ar71xx() ||
  84             soc_is_ar724x() ||
  85             soc_is_ar913x() ||
  86             soc_is_ar934x() ||
  87             soc_is_qca955x()) {
  88                 ath79_uart_data[0].uartclk = uart_clk_rate;
  89                 platform_device_register(&ath79_uart_device);
  90         } else if (soc_is_ar933x()) {
  91                 platform_device_register(&ar933x_uart_device);
  92         } else {
  93                 BUG();
  94         }
  95 }
  96
  97 void __init ath79_register_wdt(void)
  98 {
  99         struct resource res;
 100
 101         memset(&res, 0, sizeof(res));
 102
 103         res.flags = IORESOURCE_MEM;
 104         res.start = AR71XX_RESET_BASE + AR71XX_RESET_REG_WDOG_CTRL;
 105         res.end = res.start + 0x8 - 1;
 106
 107         platform_device_register_simple("ath79-wdt", -1, &res, 1);
 108 }