[AVR32] ngw100 i2c-gpio tweaks
[linux-2.6.git] / arch / avr32 / boards / atngw100 / setup.c
1 /*
2  * Board-specific setup code for the ATNGW100 Network Gateway
3  *
4  * Copyright (C) 2005-2006 Atmel Corporation
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10 #include <linux/clk.h>
11 #include <linux/etherdevice.h>
12 #include <linux/i2c-gpio.h>
13 #include <linux/init.h>
14 #include <linux/linkage.h>
15 #include <linux/platform_device.h>
16 #include <linux/types.h>
17 #include <linux/leds.h>
18 #include <linux/spi/spi.h>
19
20 #include <asm/io.h>
21 #include <asm/setup.h>
22
23 #include <asm/arch/at32ap7000.h>
24 #include <asm/arch/board.h>
25 #include <asm/arch/init.h>
26 #include <asm/arch/portmux.h>
27
28 /* Initialized by bootloader-specific startup code. */
29 struct tag *bootloader_tags __initdata;
30
31 struct eth_addr {
32         u8 addr[6];
33 };
34 static struct eth_addr __initdata hw_addr[2];
35 static struct eth_platform_data __initdata eth_data[2];
36
37 static struct spi_board_info spi0_board_info[] __initdata = {
38         {
39                 .modalias       = "mtd_dataflash",
40                 .max_speed_hz   = 10000000,
41                 .chip_select    = 0,
42         },
43 };
44
45 /*
46  * The next two functions should go away as the boot loader is
47  * supposed to initialize the macb address registers with a valid
48  * ethernet address. But we need to keep it around for a while until
49  * we can be reasonably sure the boot loader does this.
50  *
51  * The phy_id is ignored as the driver will probe for it.
52  */
53 static int __init parse_tag_ethernet(struct tag *tag)
54 {
55         int i;
56
57         i = tag->u.ethernet.mac_index;
58         if (i < ARRAY_SIZE(hw_addr))
59                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
60                        sizeof(hw_addr[i].addr));
61
62         return 0;
63 }
64 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
65
66 static void __init set_hw_addr(struct platform_device *pdev)
67 {
68         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
69         const u8 *addr;
70         void __iomem *regs;
71         struct clk *pclk;
72
73         if (!res)
74                 return;
75         if (pdev->id >= ARRAY_SIZE(hw_addr))
76                 return;
77
78         addr = hw_addr[pdev->id].addr;
79         if (!is_valid_ether_addr(addr))
80                 return;
81
82         /*
83          * Since this is board-specific code, we'll cheat and use the
84          * physical address directly as we happen to know that it's
85          * the same as the virtual address.
86          */
87         regs = (void __iomem __force *)res->start;
88         pclk = clk_get(&pdev->dev, "pclk");
89         if (!pclk)
90                 return;
91
92         clk_enable(pclk);
93         __raw_writel((addr[3] << 24) | (addr[2] << 16)
94                      | (addr[1] << 8) | addr[0], regs + 0x98);
95         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
96         clk_disable(pclk);
97         clk_put(pclk);
98 }
99
100 void __init setup_board(void)
101 {
102         at32_map_usart(1, 0);   /* USART 1: /dev/ttyS0, DB9 */
103         at32_setup_serial_console(0);
104 }
105
106 static const struct gpio_led ngw_leds[] = {
107         { .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
108                 .default_trigger = "heartbeat",
109         },
110         { .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
111         { .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
112 };
113
114 static const struct gpio_led_platform_data ngw_led_data = {
115         .num_leds =     ARRAY_SIZE(ngw_leds),
116         .leds =         (void *) ngw_leds,
117 };
118
119 static struct platform_device ngw_gpio_leds = {
120         .name =         "leds-gpio",
121         .id =           -1,
122         .dev = {
123                 .platform_data = (void *) &ngw_led_data,
124         }
125 };
126
127 static struct i2c_gpio_platform_data i2c_gpio_data = {
128         .sda_pin                = GPIO_PIN_PA(6),
129         .scl_pin                = GPIO_PIN_PA(7),
130         .sda_is_open_drain      = 1,
131         .scl_is_open_drain      = 1,
132         .udelay                 = 2,    /* close to 100 kHz */
133 };
134
135 static struct platform_device i2c_gpio_device = {
136         .name           = "i2c-gpio",
137         .id             = 0,
138         .dev            = {
139                 .platform_data  = &i2c_gpio_data,
140         },
141 };
142
143 static int __init atngw100_init(void)
144 {
145         unsigned        i;
146
147         /*
148          * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
149          * reserve any pins for it.
150          */
151
152         at32_add_system_devices();
153
154         at32_add_device_usart(0);
155
156         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
157         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
158
159         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
160         at32_add_device_usba(0, NULL);
161
162         for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
163                 at32_select_gpio(ngw_leds[i].gpio,
164                                 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
165         }
166         platform_device_register(&ngw_gpio_leds);
167
168         at32_select_gpio(i2c_gpio_data.sda_pin,
169                 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
170         at32_select_gpio(i2c_gpio_data.scl_pin,
171                 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
172         platform_device_register(&i2c_gpio_device);
173
174         return 0;
175 }
176 postcore_initcall(atngw100_init);