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/irq.h>
  13 #include <linux/i2c.h>
  14 #include <linux/i2c-gpio.h>
  15 #include <linux/init.h>
  16 #include <linux/linkage.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/types.h>
  19 #include <linux/leds.h>
  20 #include <linux/spi/spi.h>
  21
  22 #include <asm/atmel-mci.h>
  23 #include <asm/io.h>
  24 #include <asm/setup.h>
  25
  26 #include <mach/at32ap700x.h>
  27 #include <mach/board.h>
  28 #include <mach/init.h>
  29 #include <mach/portmux.h>
  30
  31 /* Oscillator frequencies. These are board-specific */
  32 unsigned long at32_board_osc_rates[3] = {
  33         [0] = 32768,    /* 32.768 kHz on RTC osc */
  34         [1] = 20000000, /* 20 MHz on osc0 */
  35         [2] = 12000000, /* 12 MHz on osc1 */
  36 };
  37
  38 /* Initialized by bootloader-specific startup code. */
  39 struct tag *bootloader_tags __initdata;
  40
  41 struct eth_addr {
  42         u8 addr[6];
  43 };
  44 static struct eth_addr __initdata hw_addr[2];
  45 static struct eth_platform_data __initdata eth_data[2];
  46
  47 static struct spi_board_info spi0_board_info[] __initdata = {
  48         {
  49                 .modalias       = "mtd_dataflash",
  50                 .max_speed_hz   = 8000000,
  51                 .chip_select    = 0,
  52         },
  53 };
  54
  55 static struct mci_platform_data __initdata mci0_data = {
  56         .detect_pin     = GPIO_PIN_PC(25),
  57         .wp_pin         = GPIO_PIN_PE(0),
  58 };
  59
  60 /*
  61  * The next two functions should go away as the boot loader is
  62  * supposed to initialize the macb address registers with a valid
  63  * ethernet address. But we need to keep it around for a while until
  64  * we can be reasonably sure the boot loader does this.
  65  *
  66  * The phy_id is ignored as the driver will probe for it.
  67  */
  68 static int __init parse_tag_ethernet(struct tag *tag)
  69 {
  70         int i;
  71
  72         i = tag->u.ethernet.mac_index;
  73         if (i < ARRAY_SIZE(hw_addr))
  74                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
  75                        sizeof(hw_addr[i].addr));
  76
  77         return 0;
  78 }
  79 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
  80
  81 static void __init set_hw_addr(struct platform_device *pdev)
  82 {
  83         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  84         const u8 *addr;
  85         void __iomem *regs;
  86         struct clk *pclk;
  87
  88         if (!res)
  89                 return;
  90         if (pdev->id >= ARRAY_SIZE(hw_addr))
  91                 return;
  92
  93         addr = hw_addr[pdev->id].addr;
  94         if (!is_valid_ether_addr(addr))
  95                 return;
  96
  97         /*
  98          * Since this is board-specific code, we'll cheat and use the
  99          * physical address directly as we happen to know that it's
 100          * the same as the virtual address.
 101          */
 102         regs = (void __iomem __force *)res->start;
 103         pclk = clk_get(&pdev->dev, "pclk");
 104         if (!pclk)
 105                 return;
 106
 107         clk_enable(pclk);
 108         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 109                      | (addr[1] << 8) | addr[0], regs + 0x98);
 110         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 111         clk_disable(pclk);
 112         clk_put(pclk);
 113 }
 114
 115 void __init setup_board(void)
 116 {
 117         at32_map_usart(1, 0);   /* USART 1: /dev/ttyS0, DB9 */
 118         at32_setup_serial_console(0);
 119 }
 120
 121 static const struct gpio_led ngw_leds[] = {
 122         { .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
 123                 .default_trigger = "heartbeat",
 124         },
 125         { .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
 126         { .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
 127 };
 128
 129 static const struct gpio_led_platform_data ngw_led_data = {
 130         .num_leds =     ARRAY_SIZE(ngw_leds),
 131         .leds =         (void *) ngw_leds,
 132 };
 133
 134 static struct platform_device ngw_gpio_leds = {
 135         .name =         "leds-gpio",
 136         .id =           -1,
 137         .dev = {
 138                 .platform_data = (void *) &ngw_led_data,
 139         }
 140 };
 141
 142 static struct i2c_gpio_platform_data i2c_gpio_data = {
 143         .sda_pin                = GPIO_PIN_PA(6),
 144         .scl_pin                = GPIO_PIN_PA(7),
 145         .sda_is_open_drain      = 1,
 146         .scl_is_open_drain      = 1,
 147         .udelay                 = 2,    /* close to 100 kHz */
 148 };
 149
 150 static struct platform_device i2c_gpio_device = {
 151         .name           = "i2c-gpio",
 152         .id             = 0,
 153         .dev            = {
 154                 .platform_data  = &i2c_gpio_data,
 155         },
 156 };
 157
 158 static struct i2c_board_info __initdata i2c_info[] = {
 159         /* NOTE:  original ATtiny24 firmware is at address 0x0b */
 160 };
 161
 162 static int __init atngw100_init(void)
 163 {
 164         unsigned        i;
 165
 166         /*
 167          * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
 168          * reserve any pins for it.
 169          */
 170
 171         at32_add_system_devices();
 172
 173         at32_add_device_usart(0);
 174
 175         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 176         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 177
 178         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 179         at32_add_device_mci(0, &mci0_data);
 180         at32_add_device_usba(0, NULL);
 181
 182         for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
 183                 at32_select_gpio(ngw_leds[i].gpio,
 184                                 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 185         }
 186         platform_device_register(&ngw_gpio_leds);
 187
 188         /* all these i2c/smbus pins should have external pullups for
 189          * open-drain sharing among all I2C devices.  SDA and SCL do;
 190          * PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
 191          * but it's not available off-board.
 192          */
 193         at32_select_periph(GPIO_PIN_PB(28), 0, AT32_GPIOF_PULLUP);
 194         at32_select_gpio(i2c_gpio_data.sda_pin,
 195                 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 196         at32_select_gpio(i2c_gpio_data.scl_pin,
 197                 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 198         platform_device_register(&i2c_gpio_device);
 199         i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
 200
 201         return 0;
 202 }
 203 postcore_initcall(atngw100_init);
 204
 205 static int __init atngw100_arch_init(void)
 206 {
 207         /* set_irq_type() after the arch_initcall for EIC has run, and
 208          * before the I2C subsystem could try using this IRQ.
 209          */
 210         return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
 211 }
 212 arch_initcall(atngw100_arch_init);