arch/arm/mach-stmp378x/stmp378x_devb.c

   1 /*
   2  * Freescale STMP378X development board support
   3  *
   4  * Embedded Alley Solutions, Inc <source@embeddedalley.com>
   5  *
   6  * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
   7  * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
   8  */
   9
  10 /*
  11  * The code contained herein is licensed under the GNU General Public
  12  * License. You may obtain a copy of the GNU General Public License
  13  * Version 2 or later at the following locations:
  14  *
  15  * http://www.opensource.org/licenses/gpl-license.html
  16  * http://www.gnu.org/copyleft/gpl.html
  17  */
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/io.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/delay.h>
  23 #include <linux/clk.h>
  24 #include <linux/err.h>
  25 #include <linux/spi/spi.h>
  26
  27 #include <asm/setup.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30
  31 #include <mach/pins.h>
  32 #include <mach/pinmux.h>
  33 #include <mach/platform.h>
  34 #include <mach/stmp3xxx.h>
  35 #include <mach/mmc.h>
  36 #include <mach/gpmi.h>
  37
  38 #include "stmp378x.h"
  39
  40 static struct platform_device *devices[] = {
  41         &stmp3xxx_dbguart,
  42         &stmp3xxx_appuart,
  43         &stmp3xxx_watchdog,
  44         &stmp3xxx_touchscreen,
  45         &stmp3xxx_rtc,
  46         &stmp3xxx_keyboard,
  47         &stmp3xxx_framebuffer,
  48         &stmp3xxx_backlight,
  49         &stmp3xxx_rotdec,
  50         &stmp3xxx_persistent,
  51         &stmp3xxx_dcp_bootstream,
  52         &stmp3xxx_dcp,
  53         &stmp3xxx_battery,
  54         &stmp378x_pxp,
  55         &stmp378x_i2c,
  56 };
  57
  58 static struct pin_desc i2c_pins_desc[] = {
  59         { PINID_I2C_SCL, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
  60         { PINID_I2C_SDA, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
  61 };
  62
  63 static struct pin_group i2c_pins = {
  64         .pins           = i2c_pins_desc,
  65         .nr_pins        = ARRAY_SIZE(i2c_pins_desc),
  66 };
  67
  68 static struct pin_desc dbguart_pins_0[] = {
  69         { PINID_PWM0, PIN_FUN3, },
  70         { PINID_PWM1, PIN_FUN3, },
  71 };
  72
  73 static struct pin_group dbguart_pins[] = {
  74         [0] = {
  75                 .pins           = dbguart_pins_0,
  76                 .nr_pins        = ARRAY_SIZE(dbguart_pins_0),
  77         },
  78 };
  79
  80 static int dbguart_pins_control(int id, int request)
  81 {
  82         int r = 0;
  83
  84         if (request)
  85                 r = stmp3xxx_request_pin_group(&dbguart_pins[id], "debug uart");
  86         else
  87                 stmp3xxx_release_pin_group(&dbguart_pins[id], "debug uart");
  88         return r;
  89 }
  90
  91 static struct pin_desc appuart_pins_0[] = {
  92         { PINID_AUART1_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
  93         { PINID_AUART1_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
  94         { PINID_AUART1_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
  95         { PINID_AUART1_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
  96 };
  97
  98 static struct pin_desc appuart_pins_1[] = {
  99 #if 0 /* enable these when second appuart will be connected */
 100         { PINID_AUART2_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
 101         { PINID_AUART2_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
 102         { PINID_AUART2_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
 103         { PINID_AUART2_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
 104 #endif
 105 };
 106
 107 static struct pin_desc mmc_pins_desc[] = {
 108         { PINID_SSP1_DATA0, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
 109         { PINID_SSP1_DATA1, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
 110         { PINID_SSP1_DATA2, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
 111         { PINID_SSP1_DATA3, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
 112         { PINID_SSP1_CMD, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
 113         { PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
 114         { PINID_SSP1_DETECT, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
 115 };
 116
 117 static struct pin_group mmc_pins = {
 118         .pins           = mmc_pins_desc,
 119         .nr_pins        = ARRAY_SIZE(mmc_pins_desc),
 120 };
 121
 122 static int stmp3xxxmmc_get_wp(void)
 123 {
 124         return gpio_get_value(PINID_PWM4);
 125 }
 126
 127 static int stmp3xxxmmc_hw_init_ssp1(void)
 128 {
 129         int ret;
 130
 131         ret = stmp3xxx_request_pin_group(&mmc_pins, "mmc");
 132         if (ret)
 133                 goto out;
 134
 135         /* Configure write protect GPIO pin */
 136         ret = gpio_request(PINID_PWM4, "mmc wp");
 137         if (ret)
 138                 goto out_wp;
 139
 140         gpio_direction_input(PINID_PWM4);
 141
 142         /* Configure POWER pin as gpio to drive power to MMC slot */
 143         ret = gpio_request(PINID_PWM3, "mmc power");
 144         if (ret)
 145                 goto out_power;
 146
 147         gpio_direction_output(PINID_PWM3, 0);
 148         mdelay(100);
 149
 150         return 0;
 151
 152 out_power:
 153         gpio_free(PINID_PWM4);
 154 out_wp:
 155         stmp3xxx_release_pin_group(&mmc_pins, "mmc");
 156 out:
 157         return ret;
 158 }
 159
 160 static void stmp3xxxmmc_hw_release_ssp1(void)
 161 {
 162         gpio_free(PINID_PWM3);
 163         gpio_free(PINID_PWM4);
 164         stmp3xxx_release_pin_group(&mmc_pins, "mmc");
 165 }
 166
 167 static void stmp3xxxmmc_cmd_pullup_ssp1(int enable)
 168 {
 169         stmp3xxx_pin_pullup(PINID_SSP1_CMD, enable, "mmc");
 170 }
 171
 172 static unsigned long
 173 stmp3xxxmmc_setclock_ssp1(void __iomem *base, unsigned long hz)
 174 {
 175         struct clk *ssp, *parent;
 176         char *p;
 177         long r;
 178
 179         ssp = clk_get(NULL, "ssp");
 180
 181         /* using SSP1, no timeout, clock rate 1 */
 182         writel(BF(2, SSP_TIMING_CLOCK_DIVIDE) |
 183                BF(0xFFFF, SSP_TIMING_TIMEOUT),
 184                base + HW_SSP_TIMING);
 185
 186         p = (hz > 1000000) ? "io" : "osc_24M";
 187         parent = clk_get(NULL, p);
 188         clk_set_parent(ssp, parent);
 189         r = clk_set_rate(ssp, 2 * hz / 1000);
 190         clk_put(parent);
 191         clk_put(ssp);
 192
 193         return hz;
 194 }
 195
 196 static struct stmp3xxxmmc_platform_data mmc_data = {
 197         .hw_init        = stmp3xxxmmc_hw_init_ssp1,
 198         .hw_release     = stmp3xxxmmc_hw_release_ssp1,
 199         .get_wp         = stmp3xxxmmc_get_wp,
 200         .cmd_pullup     = stmp3xxxmmc_cmd_pullup_ssp1,
 201         .setclock       = stmp3xxxmmc_setclock_ssp1,
 202 };
 203
 204
 205 static struct pin_group appuart_pins[] = {
 206         [0] = {
 207                 .pins           = appuart_pins_0,
 208                 .nr_pins        = ARRAY_SIZE(appuart_pins_0),
 209         },
 210         [1] = {
 211                 .pins           = appuart_pins_1,
 212                 .nr_pins        = ARRAY_SIZE(appuart_pins_1),
 213         },
 214 };
 215
 216 static struct pin_desc ssp1_pins_desc[] = {
 217         { PINID_SSP1_SCK,       PIN_FUN1, PIN_8MA, PIN_3_3V, 0, },
 218         { PINID_SSP1_CMD,       PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
 219         { PINID_SSP1_DATA0,     PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
 220         { PINID_SSP1_DATA3,     PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
 221 };
 222
 223 static struct pin_desc ssp2_pins_desc[] = {
 224         { PINID_GPMI_WRN,       PIN_FUN3, PIN_8MA, PIN_3_3V, 0, },
 225         { PINID_GPMI_RDY1,      PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
 226         { PINID_GPMI_D00,       PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
 227         { PINID_GPMI_D03,       PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
 228 };
 229
 230 static struct pin_group ssp1_pins = {
 231         .pins = ssp1_pins_desc,
 232         .nr_pins = ARRAY_SIZE(ssp1_pins_desc),
 233 };
 234
 235 static struct pin_group ssp2_pins = {
 236         .pins = ssp1_pins_desc,
 237         .nr_pins = ARRAY_SIZE(ssp2_pins_desc),
 238 };
 239
 240 static struct pin_desc gpmi_pins_desc[] = {
 241         { PINID_GPMI_CE0N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 242         { PINID_GPMI_CE1N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 243         { PINID_GMPI_CE2N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 244         { PINID_GPMI_CLE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 245         { PINID_GPMI_ALE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 246         { PINID_GPMI_WPN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
 247         { PINID_GPMI_RDY1, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 248         { PINID_GPMI_D00, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 249         { PINID_GPMI_D01, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 250         { PINID_GPMI_D02, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 251         { PINID_GPMI_D03, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 252         { PINID_GPMI_D04, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 253         { PINID_GPMI_D05, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 254         { PINID_GPMI_D06, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 255         { PINID_GPMI_D07, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 256         { PINID_GPMI_RDY0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 257         { PINID_GPMI_RDY2, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 258         { PINID_GPMI_RDY3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
 259         { PINID_GPMI_WRN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
 260         { PINID_GPMI_RDN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
 261 };
 262
 263 static struct pin_group gpmi_pins = {
 264         .pins           = gpmi_pins_desc,
 265         .nr_pins        = ARRAY_SIZE(gpmi_pins_desc),
 266 };
 267
 268 static struct mtd_partition gpmi_partitions[] = {
 269         [0] = {
 270                 .name   = "boot",
 271                 .size   = 10 * SZ_1M,
 272                 .offset = 0,
 273         },
 274         [1] = {
 275                 .name   = "data",
 276                 .size   = MTDPART_SIZ_FULL,
 277                 .offset = MTDPART_OFS_APPEND,
 278         },
 279 };
 280
 281 static struct gpmi_platform_data gpmi_data = {
 282         .pins = &gpmi_pins,
 283         .nr_parts = ARRAY_SIZE(gpmi_partitions),
 284         .parts = gpmi_partitions,
 285         .part_types = { "cmdline", NULL },
 286 };
 287
 288 static struct spi_board_info spi_board_info[] __initdata = {
 289 #if defined(CONFIG_ENC28J60) || defined(CONFIG_ENC28J60_MODULE)
 290         {
 291                 .modalias       = "enc28j60",
 292                 .max_speed_hz   = 6 * 1000 * 1000,
 293                 .bus_num        = 1,
 294                 .chip_select    = 0,
 295                 .platform_data  = NULL,
 296         },
 297 #endif
 298 };
 299
 300 static void __init stmp378x_devb_init(void)
 301 {
 302         stmp3xxx_pinmux_init(NR_REAL_IRQS);
 303
 304         /* init stmp3xxx platform */
 305         stmp3xxx_init();
 306
 307         stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control;
 308         stmp3xxx_appuart.dev.platform_data = appuart_pins;
 309         stmp3xxx_mmc.dev.platform_data = &mmc_data;
 310         stmp3xxx_gpmi.dev.platform_data = &gpmi_data;
 311         stmp3xxx_spi1.dev.platform_data = &ssp1_pins;
 312         stmp3xxx_spi2.dev.platform_data = &ssp2_pins;
 313         stmp378x_i2c.dev.platform_data = &i2c_pins;
 314
 315         /* register spi devices */
 316         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 317
 318         /* add board's devices */
 319         platform_add_devices(devices, ARRAY_SIZE(devices));
 320
 321         /* add devices selected by command line ssp1= and ssp2= options */
 322         stmp3xxx_ssp1_device_register();
 323         stmp3xxx_ssp2_device_register();
 324 }
 325
 326 MACHINE_START(STMP378X, "STMP378X")
 327         .boot_params    = 0x40000100,
 328         .map_io         = stmp378x_map_io,
 329         .init_irq       = stmp378x_init_irq,
 330         .timer          = &stmp3xxx_timer,
 331         .init_machine   = stmp378x_devb_init,
 332 MACHINE_END