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/gpio.h>
  13 #include <linux/irq.h>
  14 #include <linux/i2c.h>
  15 #include <linux/i2c-gpio.h>
  16 #include <linux/init.h>
  17 #include <linux/linkage.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/types.h>
  20 #include <linux/leds.h>
  21 #include <linux/spi/spi.h>
  22
  23 #include <asm/atmel-mci.h>
  24 #include <asm/io.h>
  25 #include <asm/setup.h>
  26
  27 #include <mach/at32ap700x.h>
  28 #include <mach/board.h>
  29 #include <mach/init.h>
  30 #include <mach/portmux.h>
  31
  32 /* Oscillator frequencies. These are board-specific */
  33 unsigned long at32_board_osc_rates[3] = {
  34         [0] = 32768,    /* 32.768 kHz on RTC osc */
  35         [1] = 20000000, /* 20 MHz on osc0 */
  36         [2] = 12000000, /* 12 MHz on osc1 */
  37 };
  38
  39 /* Initialized by bootloader-specific startup code. */
  40 struct tag *bootloader_tags __initdata;
  41
  42 struct eth_addr {
  43         u8 addr[6];
  44 };
  45 static struct eth_addr __initdata hw_addr[2];
  46 static struct eth_platform_data __initdata eth_data[2];
  47
  48 static struct spi_board_info spi0_board_info[] __initdata = {
  49         {
  50                 .modalias       = "mtd_dataflash",
  51                 .max_speed_hz   = 8000000,
  52                 .chip_select    = 0,
  53         },
  54 };
  55
  56 static struct mci_platform_data __initdata mci0_data = {
  57         .detect_pin     = GPIO_PIN_PC(25),
  58         .wp_pin         = GPIO_PIN_PE(0),
  59 };
  60
  61 /*
  62  * The next two functions should go away as the boot loader is
  63  * supposed to initialize the macb address registers with a valid
  64  * ethernet address. But we need to keep it around for a while until
  65  * we can be reasonably sure the boot loader does this.
  66  *
  67  * The phy_id is ignored as the driver will probe for it.
  68  */
  69 static int __init parse_tag_ethernet(struct tag *tag)
  70 {
  71         int i;
  72
  73         i = tag->u.ethernet.mac_index;
  74         if (i < ARRAY_SIZE(hw_addr))
  75                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
  76                        sizeof(hw_addr[i].addr));
  77
  78         return 0;
  79 }
  80 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
  81
  82 static void __init set_hw_addr(struct platform_device *pdev)
  83 {
  84         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  85         const u8 *addr;
  86         void __iomem *regs;
  87         struct clk *pclk;
  88
  89         if (!res)
  90                 return;
  91         if (pdev->id >= ARRAY_SIZE(hw_addr))
  92                 return;
  93
  94         addr = hw_addr[pdev->id].addr;
  95         if (!is_valid_ether_addr(addr))
  96                 return;
  97
  98         /*
  99          * Since this is board-specific code, we'll cheat and use the
 100          * physical address directly as we happen to know that it's
 101          * the same as the virtual address.
 102          */
 103         regs = (void __iomem __force *)res->start;
 104         pclk = clk_get(&pdev->dev, "pclk");
 105         if (!pclk)
 106                 return;
 107
 108         clk_enable(pclk);
 109         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 110                      | (addr[1] << 8) | addr[0], regs + 0x98);
 111         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 112         clk_disable(pclk);
 113         clk_put(pclk);
 114 }
 115
 116 void __init setup_board(void)
 117 {
 118         at32_map_usart(1, 0);   /* USART 1: /dev/ttyS0, DB9 */
 119         at32_setup_serial_console(0);
 120 }
 121
 122 static const struct gpio_led ngw_leds[] = {
 123         { .name = "sys", .gpio = GPIO_PIN_PA(16), .active_low = 1,
 124                 .default_trigger = "heartbeat",
 125         },
 126         { .name = "a", .gpio = GPIO_PIN_PA(19), .active_low = 1, },
 127         { .name = "b", .gpio = GPIO_PIN_PE(19), .active_low = 1, },
 128 };
 129
 130 static const struct gpio_led_platform_data ngw_led_data = {
 131         .num_leds =     ARRAY_SIZE(ngw_leds),
 132         .leds =         (void *) ngw_leds,
 133 };
 134
 135 static struct platform_device ngw_gpio_leds = {
 136         .name =         "leds-gpio",
 137         .id =           -1,
 138         .dev = {
 139                 .platform_data = (void *) &ngw_led_data,
 140         }
 141 };
 142
 143 static struct i2c_gpio_platform_data i2c_gpio_data = {
 144         .sda_pin                = GPIO_PIN_PA(6),
 145         .scl_pin                = GPIO_PIN_PA(7),
 146         .sda_is_open_drain      = 1,
 147         .scl_is_open_drain      = 1,
 148         .udelay                 = 2,    /* close to 100 kHz */
 149 };
 150
 151 static struct platform_device i2c_gpio_device = {
 152         .name           = "i2c-gpio",
 153         .id             = 0,
 154         .dev            = {
 155                 .platform_data  = &i2c_gpio_data,
 156         },
 157 };
 158
 159 static struct i2c_board_info __initdata i2c_info[] = {
 160         /* NOTE:  original ATtiny24 firmware is at address 0x0b */
 161 };
 162
 163 static int __init atngw100_init(void)
 164 {
 165         unsigned        i;
 166
 167         /*
 168          * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
 169          * reserve any pins for it.
 170          */
 171
 172         at32_add_system_devices();
 173
 174         at32_add_device_usart(0);
 175
 176         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 177         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 178
 179         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 180         at32_add_device_mci(0, &mci0_data);
 181         at32_add_device_usba(0, NULL);
 182
 183         for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
 184                 at32_select_gpio(ngw_leds[i].gpio,
 185                                 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 186         }
 187         platform_device_register(&ngw_gpio_leds);
 188
 189         /* all these i2c/smbus pins should have external pullups for
 190          * open-drain sharing among all I2C devices.  SDA and SCL do;
 191          * PB28/EXTINT3 doesn't; it should be SMBALERT# (for PMBus),
 192          * but it's not available off-board.
 193          */
 194         at32_select_periph(GPIO_PIN_PB(28), 0, AT32_GPIOF_PULLUP);
 195         at32_select_gpio(i2c_gpio_data.sda_pin,
 196                 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 197         at32_select_gpio(i2c_gpio_data.scl_pin,
 198                 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 199         platform_device_register(&i2c_gpio_device);
 200         i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
 201
 202         return 0;
 203 }
 204 postcore_initcall(atngw100_init);
 205
 206 static int __init atngw100_arch_init(void)
 207 {
 208         /* PB30 is the otherwise unused jumper on the mainboard, with an
 209          * external pullup; the jumper grounds it.  Use it however you
 210          * like, including letting U-Boot or Linux tweak boot sequences.
 211          */
 212         at32_select_gpio(GPIO_PIN_PB(30), 0);
 213         gpio_request(GPIO_PIN_PB(30), "j15");
 214         gpio_direction_input(GPIO_PIN_PB(30));
 215         gpio_export(GPIO_PIN_PB(30), false);
 216
 217         /* set_irq_type() after the arch_initcall for EIC has run, and
 218          * before the I2C subsystem could try using this IRQ.
 219          */
 220         return set_irq_type(AT32_EXTINT(3), IRQ_TYPE_EDGE_FALLING);
 221 }
 222 arch_initcall(atngw100_arch_init);