arch/avr32/boards/atstk1000/atstk1002.c

   1 /*
   2  * ATSTK1002 daughterboard-specific init code
   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/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/string.h>
  16 #include <linux/types.h>
  17 #include <linux/spi/spi.h>
  18
  19 #include <asm/io.h>
  20 #include <asm/setup.h>
  21 #include <asm/arch/at32ap7000.h>
  22 #include <asm/arch/board.h>
  23 #include <asm/arch/init.h>
  24 #include <asm/arch/portmux.h>
  25
  26
  27 #define SW2_DEFAULT             /* MMCI and UART_A available */
  28
  29 struct eth_addr {
  30         u8 addr[6];
  31 };
  32
  33 static struct eth_addr __initdata hw_addr[2];
  34
  35 static struct eth_platform_data __initdata eth_data[2];
  36 extern struct lcdc_platform_data atstk1000_fb0_data;
  37
  38 static struct spi_board_info spi0_board_info[] __initdata = {
  39         {
  40                 /* QVGA display */
  41                 .modalias       = "ltv350qv",
  42                 .max_speed_hz   = 16000000,
  43                 .chip_select    = 1,
  44         },
  45 };
  46
  47 /*
  48  * The next two functions should go away as the boot loader is
  49  * supposed to initialize the macb address registers with a valid
  50  * ethernet address. But we need to keep it around for a while until
  51  * we can be reasonably sure the boot loader does this.
  52  *
  53  * The phy_id is ignored as the driver will probe for it.
  54  */
  55 static int __init parse_tag_ethernet(struct tag *tag)
  56 {
  57         int i;
  58
  59         i = tag->u.ethernet.mac_index;
  60         if (i < ARRAY_SIZE(hw_addr))
  61                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
  62                        sizeof(hw_addr[i].addr));
  63
  64         return 0;
  65 }
  66 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
  67
  68 static void __init set_hw_addr(struct platform_device *pdev)
  69 {
  70         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  71         const u8 *addr;
  72         void __iomem *regs;
  73         struct clk *pclk;
  74
  75         if (!res)
  76                 return;
  77         if (pdev->id >= ARRAY_SIZE(hw_addr))
  78                 return;
  79
  80         addr = hw_addr[pdev->id].addr;
  81         if (!is_valid_ether_addr(addr))
  82                 return;
  83
  84         /*
  85          * Since this is board-specific code, we'll cheat and use the
  86          * physical address directly as we happen to know that it's
  87          * the same as the virtual address.
  88          */
  89         regs = (void __iomem __force *)res->start;
  90         pclk = clk_get(&pdev->dev, "pclk");
  91         if (!pclk)
  92                 return;
  93
  94         clk_enable(pclk);
  95         __raw_writel((addr[3] << 24) | (addr[2] << 16)
  96                      | (addr[1] << 8) | addr[0], regs + 0x98);
  97         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
  98         clk_disable(pclk);
  99         clk_put(pclk);
 100 }
 101
 102 void __init setup_board(void)
 103 {
 104 #ifdef  SW2_DEFAULT
 105         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 106 #else
 107         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 108 #endif
 109         /* USART 2/unused: expansion connector */
 110         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 111
 112         at32_setup_serial_console(0);
 113 }
 114
 115 static int __init atstk1002_init(void)
 116 {
 117         /*
 118          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 119          * SDRAM-specific pins so that nobody messes with them.
 120          */
 121         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 122         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 123         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 124         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 125         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 126         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 127         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 128         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 129         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 130         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 131         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 132         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 133         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 134         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 135         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 136         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 137         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 138
 139         at32_add_system_devices();
 140
 141 #ifdef  SW2_DEFAULT
 142         at32_add_device_usart(0);
 143 #else
 144         at32_add_device_usart(1);
 145 #endif
 146         at32_add_device_usart(2);
 147
 148         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 149
 150         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 151         at32_add_device_lcdc(0, &atstk1000_fb0_data);
 152
 153         return 0;
 154 }
 155 postcore_initcall(atstk1002_init);