arch/avr32/boards/atstk1000/atstk1002.c

   1 /*
   2  * ATSTK1002/ATSTK1006 daughterboard-specific init code
   3  *
   4  * Copyright (C) 2005-2007 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 /*
  39  * The ATSTK1006 daughterboard is very similar to the ATSTK1002. Both
  40  * have the AT32AP7000 chip on board; the difference is that the
  41  * STK1006 has 128 MB SDRAM (the STK1002 uses the 8 MB SDRAM chip on
  42  * the STK1000 motherboard) and 256 MB NAND flash (the STK1002 has
  43  * none.)
  44  *
  45  * The RAM difference is handled by the boot loader, so the only
  46  * difference we end up handling here is the NAND flash.
  47  */
  48 #ifdef CONFIG_BOARD_ATSTK1006
  49 #include <linux/mtd/partitions.h>
  50 #include <asm/arch/smc.h>
  51
  52 static struct smc_timing nand_timing __initdata = {
  53         .ncs_read_setup         = 0,
  54         .nrd_setup              = 10,
  55         .ncs_write_setup        = 0,
  56         .nwe_setup              = 10,
  57
  58         .ncs_read_pulse         = 30,
  59         .nrd_pulse              = 15,
  60         .ncs_write_pulse        = 30,
  61         .nwe_pulse              = 15,
  62
  63         .read_cycle             = 30,
  64         .write_cycle            = 30,
  65
  66         .ncs_read_recover       = 0,
  67         .nrd_recover            = 15,
  68         .ncs_write_recover      = 0,
  69         /* WE# high -> RE# low min 60 ns */
  70         .nwe_recover            = 50,
  71 };
  72
  73 static struct smc_config nand_config __initdata = {
  74         .bus_width              = 1,
  75         .nrd_controlled         = 1,
  76         .nwe_controlled         = 1,
  77         .nwait_mode             = 0,
  78         .byte_write             = 0,
  79         .tdf_cycles             = 2,
  80         .tdf_mode               = 0,
  81 };
  82
  83 static struct mtd_partition nand_partitions[] = {
  84         {
  85                 .name           = "main",
  86                 .offset         = 0x00000000,
  87                 .size           = MTDPART_SIZ_FULL,
  88         },
  89 };
  90
  91 static struct mtd_partition *nand_part_info(int size, int *num_partitions)
  92 {
  93         *num_partitions = ARRAY_SIZE(nand_partitions);
  94         return nand_partitions;
  95 }
  96
  97 struct atmel_nand_data atstk1006_nand_data __initdata = {
  98         .cle            = 21,
  99         .ale            = 22,
 100         .rdy_pin        = GPIO_PIN_PB(30),
 101         .enable_pin     = GPIO_PIN_PB(29),
 102         .partition_info = nand_part_info,
 103 };
 104 #endif
 105
 106 struct eth_addr {
 107         u8 addr[6];
 108 };
 109
 110 static struct eth_addr __initdata hw_addr[2];
 111 static struct eth_platform_data __initdata eth_data[2] = {
 112         {
 113                 /*
 114                  * The MDIO pullups on STK1000 are a bit too weak for
 115                  * the autodetection to work properly, so we have to
 116                  * mask out everything but the correct address.
 117                  */
 118                 .phy_mask       = ~(1U << 16),
 119         },
 120         {
 121                 .phy_mask       = ~(1U << 17),
 122         },
 123 };
 124
 125 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 126 static struct at73c213_board_info at73c213_data = {
 127         .ssc_id         = 0,
 128         .shortname      = "AVR32 STK1000 external DAC",
 129 };
 130 #endif
 131
 132 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 133 static struct spi_board_info spi0_board_info[] __initdata = {
 134 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 135         {
 136                 /* AT73C213 */
 137                 .modalias       = "at73c213",
 138                 .max_speed_hz   = 200000,
 139                 .chip_select    = 0,
 140                 .mode           = SPI_MODE_1,
 141                 .platform_data  = &at73c213_data,
 142         },
 143 #endif
 144         {
 145                 /* QVGA display */
 146                 .modalias       = "ltv350qv",
 147                 .max_speed_hz   = 16000000,
 148                 .chip_select    = 1,
 149                 .mode           = SPI_MODE_3,
 150         },
 151 };
 152 #endif
 153
 154 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 155 static struct spi_board_info spi1_board_info[] __initdata = { {
 156         /* patch in custom entries here */
 157 } };
 158 #endif
 159
 160 /*
 161  * The next two functions should go away as the boot loader is
 162  * supposed to initialize the macb address registers with a valid
 163  * ethernet address. But we need to keep it around for a while until
 164  * we can be reasonably sure the boot loader does this.
 165  *
 166  * The phy_id is ignored as the driver will probe for it.
 167  */
 168 static int __init parse_tag_ethernet(struct tag *tag)
 169 {
 170         int i;
 171
 172         i = tag->u.ethernet.mac_index;
 173         if (i < ARRAY_SIZE(hw_addr))
 174                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
 175                        sizeof(hw_addr[i].addr));
 176
 177         return 0;
 178 }
 179 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
 180
 181 static void __init set_hw_addr(struct platform_device *pdev)
 182 {
 183         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 184         const u8 *addr;
 185         void __iomem *regs;
 186         struct clk *pclk;
 187
 188         if (!res)
 189                 return;
 190         if (pdev->id >= ARRAY_SIZE(hw_addr))
 191                 return;
 192
 193         addr = hw_addr[pdev->id].addr;
 194         if (!is_valid_ether_addr(addr))
 195                 return;
 196
 197         /*
 198          * Since this is board-specific code, we'll cheat and use the
 199          * physical address directly as we happen to know that it's
 200          * the same as the virtual address.
 201          */
 202         regs = (void __iomem __force *)res->start;
 203         pclk = clk_get(&pdev->dev, "pclk");
 204         if (!pclk)
 205                 return;
 206
 207         clk_enable(pclk);
 208         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 209                      | (addr[1] << 8) | addr[0], regs + 0x98);
 210         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 211         clk_disable(pclk);
 212         clk_put(pclk);
 213 }
 214
 215 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 216 static void __init atstk1002_setup_extdac(void)
 217 {
 218         struct clk *gclk;
 219         struct clk *pll;
 220
 221         gclk = clk_get(NULL, "gclk0");
 222         if (IS_ERR(gclk))
 223                 goto err_gclk;
 224         pll = clk_get(NULL, "pll0");
 225         if (IS_ERR(pll))
 226                 goto err_pll;
 227
 228         if (clk_set_parent(gclk, pll)) {
 229                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
 230                 goto err_set_clk;
 231         }
 232
 233         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
 234         at73c213_data.dac_clk = gclk;
 235
 236 err_set_clk:
 237         clk_put(pll);
 238 err_pll:
 239         clk_put(gclk);
 240 err_gclk:
 241         return;
 242 }
 243 #else
 244 static void __init atstk1002_setup_extdac(void)
 245 {
 246
 247 }
 248 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 249
 250 void __init setup_board(void)
 251 {
 252 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 253         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 254 #else
 255         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 256 #endif
 257         /* USART 2/unused: expansion connector */
 258         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 259
 260         at32_setup_serial_console(0);
 261 }
 262
 263 static int __init atstk1002_init(void)
 264 {
 265         /*
 266          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 267          * SDRAM-specific pins so that nobody messes with them.
 268          */
 269         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 270         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 271         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 272         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 273         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 274         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 275         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 276         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 277         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 278         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 279         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 280         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 281         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 282         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 283         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 284         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 285         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 286
 287         at32_add_system_devices();
 288
 289 #ifdef CONFIG_BOARD_ATSTK1006
 290         smc_set_timing(&nand_config, &nand_timing);
 291         smc_set_configuration(3, &nand_config);
 292         at32_add_device_nand(0, &atstk1006_nand_data);
 293 #endif
 294
 295 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 296         at32_add_device_usart(1);
 297 #else
 298         at32_add_device_usart(0);
 299 #endif
 300         at32_add_device_usart(2);
 301
 302 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
 303         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 304 #endif
 305 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 306         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 307 #endif
 308 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 309         at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 310 #endif
 311 #ifndef CONFIG_BOARD_ATSTK1002_SW2_CUSTOM
 312         at32_add_device_mci(0, NULL);
 313 #endif
 314 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
 315         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 316 #else
 317         at32_add_device_lcdc(0, &atstk1000_lcdc_data,
 318                              fbmem_start, fbmem_size, 0);
 319 #endif
 320         at32_add_device_usba(0, NULL);
 321 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 322         at32_add_device_ssc(0, ATMEL_SSC_TX);
 323 #endif
 324
 325         atstk1000_setup_j2_leds();
 326         atstk1002_setup_extdac();
 327
 328         return 0;
 329 }
 330 postcore_initcall(atstk1002_init);