git.oblomov.eu Git - linux-2.6/blob - 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 #include <linux/spi/at73c213.h>
  19
  20 #include <video/atmel_lcdc.h>
  21
  22 #include <asm/io.h>
  23 #include <asm/setup.h>
  24 #include <asm/arch/at32ap700x.h>
  25 #include <asm/arch/board.h>
  26 #include <asm/arch/init.h>
  27 #include <asm/arch/portmux.h>
  28
  29 #include "atstk1000.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 struct eth_addr {
  39         u8 addr[6];
  40 };
  41
  42 static struct eth_addr __initdata hw_addr[2];
  43 static struct eth_platform_data __initdata eth_data[2] = {
  44         {
  45                 /*
  46                  * The MDIO pullups on STK1000 are a bit too weak for
  47                  * the autodetection to work properly, so we have to
  48                  * mask out everything but the correct address.
  49                  */
  50                 .phy_mask       = ~(1U << 16),
  51         },
  52         {
  53                 .phy_mask       = ~(1U << 17),
  54         },
  55 };
  56
  57 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  58 static struct at73c213_board_info at73c213_data = {
  59         .ssc_id         = 0,
  60         .shortname      = "AVR32 STK1000 external DAC",
  61 };
  62 #endif
  63
  64 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
  65 static struct spi_board_info spi0_board_info[] __initdata = {
  66 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  67         {
  68                 /* AT73C213 */
  69                 .modalias       = "at73c213",
  70                 .max_speed_hz   = 200000,
  71                 .chip_select    = 0,
  72                 .mode           = SPI_MODE_1,
  73                 .platform_data  = &at73c213_data,
  74         },
  75 #endif
  76         {
  77                 /* QVGA display */
  78                 .modalias       = "ltv350qv",
  79                 .max_speed_hz   = 16000000,
  80                 .chip_select    = 1,
  81                 .mode           = SPI_MODE_3,
  82         },
  83 };
  84 #endif
  85
  86 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
  87 static struct spi_board_info spi1_board_info[] __initdata = { {
  88         /* patch in custom entries here */
  89 } };
  90 #endif
  91
  92 /*
  93  * The next two functions should go away as the boot loader is
  94  * supposed to initialize the macb address registers with a valid
  95  * ethernet address. But we need to keep it around for a while until
  96  * we can be reasonably sure the boot loader does this.
  97  *
  98  * The phy_id is ignored as the driver will probe for it.
  99  */
 100 static int __init parse_tag_ethernet(struct tag *tag)
 101 {
 102         int i;
 103
 104         i = tag->u.ethernet.mac_index;
 105         if (i < ARRAY_SIZE(hw_addr))
 106                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
 107                        sizeof(hw_addr[i].addr));
 108
 109         return 0;
 110 }
 111 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
 112
 113 static void __init set_hw_addr(struct platform_device *pdev)
 114 {
 115         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 116         const u8 *addr;
 117         void __iomem *regs;
 118         struct clk *pclk;
 119
 120         if (!res)
 121                 return;
 122         if (pdev->id >= ARRAY_SIZE(hw_addr))
 123                 return;
 124
 125         addr = hw_addr[pdev->id].addr;
 126         if (!is_valid_ether_addr(addr))
 127                 return;
 128
 129         /*
 130          * Since this is board-specific code, we'll cheat and use the
 131          * physical address directly as we happen to know that it's
 132          * the same as the virtual address.
 133          */
 134         regs = (void __iomem __force *)res->start;
 135         pclk = clk_get(&pdev->dev, "pclk");
 136         if (!pclk)
 137                 return;
 138
 139         clk_enable(pclk);
 140         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 141                      | (addr[1] << 8) | addr[0], regs + 0x98);
 142         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 143         clk_disable(pclk);
 144         clk_put(pclk);
 145 }
 146
 147 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 148 static void __init atstk1002_setup_extdac(void)
 149 {
 150         struct clk *gclk;
 151         struct clk *pll;
 152
 153         gclk = clk_get(NULL, "gclk0");
 154         if (IS_ERR(gclk))
 155                 goto err_gclk;
 156         pll = clk_get(NULL, "pll0");
 157         if (IS_ERR(pll))
 158                 goto err_pll;
 159
 160         if (clk_set_parent(gclk, pll)) {
 161                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
 162                 goto err_set_clk;
 163         }
 164
 165         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
 166         at73c213_data.dac_clk = gclk;
 167
 168 err_set_clk:
 169         clk_put(pll);
 170 err_pll:
 171         clk_put(gclk);
 172 err_gclk:
 173         return;
 174 }
 175 #else
 176 static void __init atstk1002_setup_extdac(void)
 177 {
 178
 179 }
 180 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 181
 182 void __init setup_board(void)
 183 {
 184 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 185         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 186 #else
 187         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 188 #endif
 189         /* USART 2/unused: expansion connector */
 190         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 191
 192         at32_setup_serial_console(0);
 193 }
 194
 195 static int __init atstk1002_init(void)
 196 {
 197         /*
 198          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 199          * SDRAM-specific pins so that nobody messes with them.
 200          */
 201         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 202         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 203         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 204         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 205         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 206         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 207         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 208         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 209         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 210         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 211         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 212         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 213         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 214         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 215         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 216         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 217         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 218
 219         at32_add_system_devices();
 220
 221 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 222         at32_add_device_usart(1);
 223 #else
 224         at32_add_device_usart(0);
 225 #endif
 226         at32_add_device_usart(2);
 227
 228 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
 229         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 230 #endif
 231 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 232         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 233 #endif
 234 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 235         at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 236 #endif
 237 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
 238         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 239 #else
 240         at32_add_device_lcdc(0, &atstk1000_lcdc_data,
 241                              fbmem_start, fbmem_size, 0);
 242 #endif
 243         at32_add_device_usba(0, NULL);
 244 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 245         at32_add_device_ssc(0, ATMEL_SSC_TX);
 246 #endif
 247
 248         atstk1000_setup_j2_leds();
 249         atstk1002_setup_extdac();
 250
 251         return 0;
 252 }
 253 postcore_initcall(atstk1002_init);