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);