Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
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(3),
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(3),
66 .end = ATH79_MISC_IRQ(3),
67 .flags = IORESOURCE_IRQ,
68 },
69};
70
71static 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
78void __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
98void __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
111static struct ath79_gpio_platform_data ath79_gpio_pdata;
112
113static 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
126static 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
136void __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}