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
  32 struct eth_addr {
  33         u8 addr[6];
  34 };
  35
  36 static struct eth_addr __initdata hw_addr[2];
  37 static struct eth_platform_data __initdata eth_data[2] = {
  38         {
  39                 /*
  40                  * The MDIO pullups on STK1000 are a bit too weak for
  41                  * the autodetection to work properly, so we have to
  42                  * mask out everything but the correct address.
  43                  */
  44                 .phy_mask       = ~(1U << 16),
  45         },
  46         {
  47                 .phy_mask       = ~(1U << 17),
  48         },
  49 };
  50
  51 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  52 static struct at73c213_board_info at73c213_data = {
  53         .ssc_id         = 0,
  54         .shortname      = "AVR32 STK1000 external DAC",
  55 };
  56 #endif
  57
  58 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
  59 static struct spi_board_info spi0_board_info[] __initdata = {
  60 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
  61         {
  62                 /* AT73C213 */
  63                 .modalias       = "at73c213",
  64                 .max_speed_hz   = 200000,
  65                 .chip_select    = 0,
  66                 .mode           = SPI_MODE_1,
  67                 .platform_data  = &at73c213_data,
  68         },
  69 #endif
  70         {
  71                 /* QVGA display */
  72                 .modalias       = "ltv350qv",
  73                 .max_speed_hz   = 16000000,
  74                 .chip_select    = 1,
  75                 .mode           = SPI_MODE_3,
  76         },
  77 };
  78 #endif
  79
  80 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
  81 static struct spi_board_info spi1_board_info[] __initdata = { {
  82         /* patch in custom entries here */
  83 } };
  84 #endif
  85
  86 /*
  87  * The next two functions should go away as the boot loader is
  88  * supposed to initialize the macb address registers with a valid
  89  * ethernet address. But we need to keep it around for a while until
  90  * we can be reasonably sure the boot loader does this.
  91  *
  92  * The phy_id is ignored as the driver will probe for it.
  93  */
  94 static int __init parse_tag_ethernet(struct tag *tag)
  95 {
  96         int i;
  97
  98         i = tag->u.ethernet.mac_index;
  99         if (i < ARRAY_SIZE(hw_addr))
 100                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
 101                        sizeof(hw_addr[i].addr));
 102
 103         return 0;
 104 }
 105 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
 106
 107 static void __init set_hw_addr(struct platform_device *pdev)
 108 {
 109         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 110         const u8 *addr;
 111         void __iomem *regs;
 112         struct clk *pclk;
 113
 114         if (!res)
 115                 return;
 116         if (pdev->id >= ARRAY_SIZE(hw_addr))
 117                 return;
 118
 119         addr = hw_addr[pdev->id].addr;
 120         if (!is_valid_ether_addr(addr))
 121                 return;
 122
 123         /*
 124          * Since this is board-specific code, we'll cheat and use the
 125          * physical address directly as we happen to know that it's
 126          * the same as the virtual address.
 127          */
 128         regs = (void __iomem __force *)res->start;
 129         pclk = clk_get(&pdev->dev, "pclk");
 130         if (!pclk)
 131                 return;
 132
 133         clk_enable(pclk);
 134         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 135                      | (addr[1] << 8) | addr[0], regs + 0x98);
 136         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 137         clk_disable(pclk);
 138         clk_put(pclk);
 139 }
 140
 141 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 142 static void __init atstk1002_setup_extdac(void)
 143 {
 144         struct clk *gclk;
 145         struct clk *pll;
 146
 147         gclk = clk_get(NULL, "gclk0");
 148         if (IS_ERR(gclk))
 149                 goto err_gclk;
 150         pll = clk_get(NULL, "pll0");
 151         if (IS_ERR(pll))
 152                 goto err_pll;
 153
 154         if (clk_set_parent(gclk, pll)) {
 155                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
 156                 goto err_set_clk;
 157         }
 158
 159         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
 160         at73c213_data.dac_clk = gclk;
 161
 162 err_set_clk:
 163         clk_put(pll);
 164 err_pll:
 165         clk_put(gclk);
 166 err_gclk:
 167         return;
 168 }
 169 #else
 170 static void __init atstk1002_setup_extdac(void)
 171 {
 172
 173 }
 174 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 175
 176 void __init setup_board(void)
 177 {
 178 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 179         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 180 #else
 181         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 182 #endif
 183         /* USART 2/unused: expansion connector */
 184         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 185
 186         at32_setup_serial_console(0);
 187 }
 188
 189 static int __init atstk1002_init(void)
 190 {
 191         /*
 192          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 193          * SDRAM-specific pins so that nobody messes with them.
 194          */
 195         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 196         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 197         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 198         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 199         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 200         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 201         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 202         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 203         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 204         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 205         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 206         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 207         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 208         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 209         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 210         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 211         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 212
 213         at32_add_system_devices();
 214
 215 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 216         at32_add_device_usart(1);
 217 #else
 218         at32_add_device_usart(0);
 219 #endif
 220         at32_add_device_usart(2);
 221
 222 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
 223         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 224 #endif
 225 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 226         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 227 #endif
 228 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 229         at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 230 #endif
 231 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
 232         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 233 #else
 234         at32_add_device_lcdc(0, &atstk1000_lcdc_data,
 235                              fbmem_start, fbmem_size);
 236 #endif
 237         at32_add_device_usba(0, NULL);
 238 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 239         at32_add_device_ssc(0, ATMEL_SSC_TX);
 240 #endif
 241
 242         atstk1000_setup_j2_leds();
 243         atstk1002_setup_extdac();
 244
 245         return 0;
 246 }
 247 postcore_initcall(atstk1002_init);