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/init.h>
  13 #include <linux/linkage.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/types.h>
  16 #include <linux/spi/spi.h>
  17
  18 #include <asm/io.h>
  19 #include <asm/setup.h>
  20
  21 #include <asm/arch/at32ap7000.h>
  22 #include <asm/arch/board.h>
  23 #include <asm/arch/init.h>
  24
  25 /* Initialized by bootloader-specific startup code. */
  26 struct tag *bootloader_tags __initdata;
  27
  28 struct eth_addr {
  29         u8 addr[6];
  30 };
  31 static struct eth_addr __initdata hw_addr[2];
  32 static struct eth_platform_data __initdata eth_data[2];
  33
  34 static struct spi_board_info spi0_board_info[] __initdata = {
  35         {
  36                 .modalias       = "mtd_dataflash",
  37                 .max_speed_hz   = 10000000,
  38                 .chip_select    = 0,
  39         },
  40 };
  41
  42 /*
  43  * The next two functions should go away as the boot loader is
  44  * supposed to initialize the macb address registers with a valid
  45  * ethernet address. But we need to keep it around for a while until
  46  * we can be reasonably sure the boot loader does this.
  47  *
  48  * The phy_id is ignored as the driver will probe for it.
  49  */
  50 static int __init parse_tag_ethernet(struct tag *tag)
  51 {
  52         int i;
  53
  54         i = tag->u.ethernet.mac_index;
  55         if (i < ARRAY_SIZE(hw_addr))
  56                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
  57                        sizeof(hw_addr[i].addr));
  58
  59         return 0;
  60 }
  61 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
  62
  63 static void __init set_hw_addr(struct platform_device *pdev)
  64 {
  65         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  66         const u8 *addr;
  67         void __iomem *regs;
  68         struct clk *pclk;
  69
  70         if (!res)
  71                 return;
  72         if (pdev->id >= ARRAY_SIZE(hw_addr))
  73                 return;
  74
  75         addr = hw_addr[pdev->id].addr;
  76         if (!is_valid_ether_addr(addr))
  77                 return;
  78
  79         /*
  80          * Since this is board-specific code, we'll cheat and use the
  81          * physical address directly as we happen to know that it's
  82          * the same as the virtual address.
  83          */
  84         regs = (void __iomem __force *)res->start;
  85         pclk = clk_get(&pdev->dev, "pclk");
  86         if (!pclk)
  87                 return;
  88
  89         clk_enable(pclk);
  90         __raw_writel((addr[3] << 24) | (addr[2] << 16)
  91                      | (addr[1] << 8) | addr[0], regs + 0x98);
  92         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
  93         clk_disable(pclk);
  94         clk_put(pclk);
  95 }
  96
  97 void __init setup_board(void)
  98 {
  99         at32_map_usart(1, 0);   /* USART 1: /dev/ttyS0, DB9 */
 100         at32_setup_serial_console(0);
 101 }
 102
 103 static int __init atngw100_init(void)
 104 {
 105         /*
 106          * ATNGW100 uses 16-bit SDRAM interface, so we don't need to
 107          * reserve any pins for it.
 108          */
 109
 110         at32_add_system_devices();
 111
 112         at32_add_device_usart(0);
 113
 114         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 115         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 116
 117         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 118
 119         return 0;
 120 }
 121 postcore_initcall(atngw100_init);