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
ath79_register_uart(void)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
ath79_register_wdt(void)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 }
109