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
  32 /*
  33  * The ATSTK1006 daughterboard is very similar to the ATSTK1002. Both
  34  * have the AT32AP7000 chip on board; the difference is that the
  35  * STK1006 has 128 MB SDRAM (the STK1002 uses the 8 MB SDRAM chip on
  36  * the STK1000 motherboard) and 256 MB NAND flash (the STK1002 has
  37  * none.)
  38  *
  39  * The RAM difference is handled by the boot loader, so the only
  40  * difference we end up handling here is the NAND flash.
  41  */
  42 #ifdef CONFIG_BOARD_ATSTK1006
  43 #include <linux/mtd/partitions.h>
  44 #include <asm/arch/smc.h>
  45
  46 static struct smc_timing nand_timing __initdata = {
  47         .ncs_read_setup         = 0,
  48         .nrd_setup              = 10,
  49         .ncs_write_setup        = 0,
  50         .nwe_setup              = 10,
  51
  52         .ncs_read_pulse         = 30,
  53         .nrd_pulse              = 15,
  54         .ncs_write_pulse        = 30,
  55         .nwe_pulse              = 15,
  56
  57         .read_cycle             = 30,
  58         .write_cycle            = 30,
  59
  60         .ncs_read_recover       = 0,
  61         .nrd_recover            = 15,
  62         .ncs_write_recover      = 0,
  63         /* WE# high -> RE# low min 60 ns */
  64         .nwe_recover            = 50,
  65 };
  66
  67 static struct smc_config nand_config __initdata = {
  68         .bus_width              = 1,
  69         .nrd_controlled         = 1,
  70         .nwe_controlled         = 1,
  71         .nwait_mode             = 0,
  72         .byte_write             = 0,
  73         .tdf_cycles             = 2,
  74         .tdf_mode               = 0,
  75 };
  76
  77 static struct mtd_partition nand_partitions[] = {
  78         {
  79                 .name           = "main",
  80                 .offset         = 0x00000000,
  81                 .size           = MTDPART_SIZ_FULL,
  82         },
  83 };
  84
  85 static struct mtd_partition *nand_part_info(int size, int *num_partitions)
  86 {
  87         *num_partitions = ARRAY_SIZE(nand_partitions);
  88         return nand_partitions;
  89 }
  90
  91 struct atmel_nand_data atstk1006_nand_data __initdata = {
  92         .cle            = 21,
  93         .ale            = 22,
  94         .rdy_pin        = GPIO_PIN_PB(30),
  95         .enable_pin     = GPIO_PIN_PB(29),
  96         .partition_info = nand_part_info,
  97 };
  98 #endif
  99
 100 struct eth_addr {
 101         u8 addr[6];
 102 };
 103
 104 static struct eth_addr __initdata hw_addr[2];
 105 static struct eth_platform_data __initdata eth_data[2] = {
 106         {
 107                 /*
 108                  * The MDIO pullups on STK1000 are a bit too weak for
 109                  * the autodetection to work properly, so we have to
 110                  * mask out everything but the correct address.
 111                  */
 112                 .phy_mask       = ~(1U << 16),
 113         },
 114         {
 115                 .phy_mask       = ~(1U << 17),
 116         },
 117 };
 118
 119 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 120 static struct at73c213_board_info at73c213_data = {
 121         .ssc_id         = 0,
 122         .shortname      = "AVR32 STK1000 external DAC",
 123 };
 124 #endif
 125
 126 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 127 static struct spi_board_info spi0_board_info[] __initdata = {
 128 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 129         {
 130                 /* AT73C213 */
 131                 .modalias       = "at73c213",
 132                 .max_speed_hz   = 200000,
 133                 .chip_select    = 0,
 134                 .mode           = SPI_MODE_1,
 135                 .platform_data  = &at73c213_data,
 136         },
 137 #endif
 138         {
 139                 /* QVGA display */
 140                 .modalias       = "ltv350qv",
 141                 .max_speed_hz   = 16000000,
 142                 .chip_select    = 1,
 143                 .mode           = SPI_MODE_3,
 144         },
 145 };
 146 #endif
 147
 148 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 149 static struct spi_board_info spi1_board_info[] __initdata = { {
 150         /* patch in custom entries here */
 151 } };
 152 #endif
 153
 154 /*
 155  * The next two functions should go away as the boot loader is
 156  * supposed to initialize the macb address registers with a valid
 157  * ethernet address. But we need to keep it around for a while until
 158  * we can be reasonably sure the boot loader does this.
 159  *
 160  * The phy_id is ignored as the driver will probe for it.
 161  */
 162 static int __init parse_tag_ethernet(struct tag *tag)
 163 {
 164         int i;
 165
 166         i = tag->u.ethernet.mac_index;
 167         if (i < ARRAY_SIZE(hw_addr))
 168                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
 169                        sizeof(hw_addr[i].addr));
 170
 171         return 0;
 172 }
 173 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
 174
 175 static void __init set_hw_addr(struct platform_device *pdev)
 176 {
 177         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 178         const u8 *addr;
 179         void __iomem *regs;
 180         struct clk *pclk;
 181
 182         if (!res)
 183                 return;
 184         if (pdev->id >= ARRAY_SIZE(hw_addr))
 185                 return;
 186
 187         addr = hw_addr[pdev->id].addr;
 188         if (!is_valid_ether_addr(addr))
 189                 return;
 190
 191         /*
 192          * Since this is board-specific code, we'll cheat and use the
 193          * physical address directly as we happen to know that it's
 194          * the same as the virtual address.
 195          */
 196         regs = (void __iomem __force *)res->start;
 197         pclk = clk_get(&pdev->dev, "pclk");
 198         if (!pclk)
 199                 return;
 200
 201         clk_enable(pclk);
 202         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 203                      | (addr[1] << 8) | addr[0], regs + 0x98);
 204         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 205         clk_disable(pclk);
 206         clk_put(pclk);
 207 }
 208
 209 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 210 static void __init atstk1002_setup_extdac(void)
 211 {
 212         struct clk *gclk;
 213         struct clk *pll;
 214
 215         gclk = clk_get(NULL, "gclk0");
 216         if (IS_ERR(gclk))
 217                 goto err_gclk;
 218         pll = clk_get(NULL, "pll0");
 219         if (IS_ERR(pll))
 220                 goto err_pll;
 221
 222         if (clk_set_parent(gclk, pll)) {
 223                 pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
 224                 goto err_set_clk;
 225         }
 226
 227         at32_select_periph(GPIO_PIN_PA(30), GPIO_PERIPH_A, 0);
 228         at73c213_data.dac_clk = gclk;
 229
 230 err_set_clk:
 231         clk_put(pll);
 232 err_pll:
 233         clk_put(gclk);
 234 err_gclk:
 235         return;
 236 }
 237 #else
 238 static void __init atstk1002_setup_extdac(void)
 239 {
 240
 241 }
 242 #endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */
 243
 244 void __init setup_board(void)
 245 {
 246 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 247         at32_map_usart(0, 1);   /* USART 0/B: /dev/ttyS1, IRDA */
 248 #else
 249         at32_map_usart(1, 0);   /* USART 1/A: /dev/ttyS0, DB9 */
 250 #endif
 251         /* USART 2/unused: expansion connector */
 252         at32_map_usart(3, 2);   /* USART 3/C: /dev/ttyS2, DB9 */
 253
 254         at32_setup_serial_console(0);
 255 }
 256
 257 static int __init atstk1002_init(void)
 258 {
 259         /*
 260          * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
 261          * SDRAM-specific pins so that nobody messes with them.
 262          */
 263         at32_reserve_pin(GPIO_PIN_PE(0));       /* DATA[16]     */
 264         at32_reserve_pin(GPIO_PIN_PE(1));       /* DATA[17]     */
 265         at32_reserve_pin(GPIO_PIN_PE(2));       /* DATA[18]     */
 266         at32_reserve_pin(GPIO_PIN_PE(3));       /* DATA[19]     */
 267         at32_reserve_pin(GPIO_PIN_PE(4));       /* DATA[20]     */
 268         at32_reserve_pin(GPIO_PIN_PE(5));       /* DATA[21]     */
 269         at32_reserve_pin(GPIO_PIN_PE(6));       /* DATA[22]     */
 270         at32_reserve_pin(GPIO_PIN_PE(7));       /* DATA[23]     */
 271         at32_reserve_pin(GPIO_PIN_PE(8));       /* DATA[24]     */
 272         at32_reserve_pin(GPIO_PIN_PE(9));       /* DATA[25]     */
 273         at32_reserve_pin(GPIO_PIN_PE(10));      /* DATA[26]     */
 274         at32_reserve_pin(GPIO_PIN_PE(11));      /* DATA[27]     */
 275         at32_reserve_pin(GPIO_PIN_PE(12));      /* DATA[28]     */
 276         at32_reserve_pin(GPIO_PIN_PE(13));      /* DATA[29]     */
 277         at32_reserve_pin(GPIO_PIN_PE(14));      /* DATA[30]     */
 278         at32_reserve_pin(GPIO_PIN_PE(15));      /* DATA[31]     */
 279         at32_reserve_pin(GPIO_PIN_PE(26));      /* SDCS         */
 280
 281         at32_add_system_devices();
 282
 283 #ifdef CONFIG_BOARD_ATSTK1006
 284         smc_set_timing(&nand_config, &nand_timing);
 285         smc_set_configuration(3, &nand_config);
 286         at32_add_device_nand(0, &atstk1006_nand_data);
 287 #endif
 288
 289 #ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 290         at32_add_device_usart(1);
 291 #else
 292         at32_add_device_usart(0);
 293 #endif
 294         at32_add_device_usart(2);
 295
 296 #ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
 297         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 298 #endif
 299 #ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
 300         at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
 301 #endif
 302 #ifdef CONFIG_BOARD_ATSTK100X_SPI1
 303         at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 304 #endif
 305 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
 306         set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
 307 #else
 308         at32_add_device_lcdc(0, &atstk1000_lcdc_data,
 309                              fbmem_start, fbmem_size);
 310 #endif
 311         at32_add_device_usba(0, NULL);
 312 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
 313         at32_add_device_ssc(0, ATMEL_SSC_TX);
 314 #endif
 315
 316         atstk1000_setup_j2_leds();
 317         atstk1002_setup_extdac();
 318
 319         return 0;
 320 }
 321 postcore_initcall(atstk1002_init);