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 <asm/mach-ath79/ar933x_uart_platform.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 ar933x_uart_platform_data ar933x_uart_data;
  72 static struct platform_device ar933x_uart_device = {
  73         .name           = "ar933x-uart",
  74         .id             = -1,
  75         .resource       = ar933x_uart_resources,
  76         .num_resources  = ARRAY_SIZE(ar933x_uart_resources),
  77         .dev = {
  78                 .platform_data  = &ar933x_uart_data,
  79         },
  80 };
  81
  82 void __init ath79_register_uart(void)
  83 {
  84         struct clk *clk;
  85
  86         clk = clk_get(NULL, "uart");
  87         if (IS_ERR(clk))
  88                 panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
  89
  90         if (soc_is_ar71xx() ||
  91             soc_is_ar724x() ||
  92             soc_is_ar913x() ||
  93             soc_is_ar934x() ||
  94             soc_is_qca955x()) {
  95                 ath79_uart_data[0].uartclk = clk_get_rate(clk);
  96                 platform_device_register(&ath79_uart_device);
  97         } else if (soc_is_ar933x()) {
  98                 ar933x_uart_data.uartclk = clk_get_rate(clk);
  99                 platform_device_register(&ar933x_uart_device);
 100         } else {
 101                 BUG();
 102         }
 103 }
 104
 105 void __init ath79_register_wdt(void)
 106 {
 107         struct resource res;
 108
 109         memset(&res, 0, sizeof(res));
 110
 111         res.flags = IORESOURCE_MEM;
 112         res.start = AR71XX_RESET_BASE + AR71XX_RESET_REG_WDOG_CTRL;
 113         res.end = res.start + 0x8 - 1;
 114
 115         platform_device_register_simple("ath79-wdt", -1, &res, 1);
 116 }