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
 27static 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)
 36static struct plat_serial8250_port ath79_uart_data[] = {
 37	{
 38		.mapbase	= AR71XX_UART_BASE,
 39		.irq		= ATH79_MISC_IRQ_UART,
 40		.flags		= AR71XX_UART_FLAGS,
 41		.iotype		= UPIO_MEM32,
 42		.regshift	= 2,
 43	}, {
 44		/* terminating entry */
 45	}
 46};
 47
 48static 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
 58static 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_UART,
 66		.end	= ATH79_MISC_IRQ_UART,
 67		.flags	= IORESOURCE_IRQ,
 68	},
 69};
 70
 71static struct ar933x_uart_platform_data ar933x_uart_data;
 72static 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
 82void __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		ath79_uart_data[0].uartclk = clk_get_rate(clk);
 95		platform_device_register(&ath79_uart_device);
 96	} else if (soc_is_ar933x()) {
 97		ar933x_uart_data.uartclk = clk_get_rate(clk);
 98		platform_device_register(&ar933x_uart_device);
 99	} else {
100		BUG();
101	}
102}
103
104static struct platform_device ath79_wdt_device = {
105	.name		= "ath79-wdt",
106	.id		= -1,
107};
108
109void __init ath79_register_wdt(void)
110{
111	platform_device_register(&ath79_wdt_device);
112}