arch/arm/mach-ep93xx/vision_ep9307.c

   1 /*
   2  * arch/arm/mach-ep93xx/vision_ep9307.c
   3  * Vision Engraving Systems EP9307 SoM support.
   4  *
   5  * Copyright (C) 2008-2011 Vision Engraving Systems
   6  * H Hartley Sweeten <hsweeten@visionengravers.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/irq.h>
  20 #include <linux/gpio.h>
  21 #include <linux/fb.h>
  22 #include <linux/io.h>
  23 #include <linux/mtd/partitions.h>
  24 #include <linux/i2c.h>
  25 #include <linux/platform_data/pca953x.h>
  26 #include <linux/spi/spi.h>
  27 #include <linux/spi/flash.h>
  28 #include <linux/spi/mmc_spi.h>
  29 #include <linux/mmc/host.h>
  30
  31 #include <sound/cs4271.h>
  32
  33 #include <mach/hardware.h>
  34 #include <linux/platform_data/video-ep93xx.h>
  35 #include <linux/platform_data/spi-ep93xx.h>
  36 #include <mach/gpio-ep93xx.h>
  37
  38 #include <asm/mach-types.h>
  39 #include <asm/mach/map.h>
  40 #include <asm/mach/arch.h>
  41
  42 #include "soc.h"
  43
  44 /*************************************************************************
  45  * Static I/O mappings for the FPGA
  46  *************************************************************************/
  47 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  48 #define VISION_VIRT_BASE        0xfebff000
  49
  50 static struct map_desc vision_io_desc[] __initdata = {
  51         {
  52                 .virtual        = VISION_VIRT_BASE,
  53                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  54                 .length         = SZ_4K,
  55                 .type           = MT_DEVICE,
  56         },
  57 };
  58
  59 static void __init vision_map_io(void)
  60 {
  61         ep93xx_map_io();
  62
  63         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  64 }
  65
  66 /*************************************************************************
  67  * Ethernet
  68  *************************************************************************/
  69 static struct ep93xx_eth_data vision_eth_data __initdata = {
  70         .phy_id         = 1,
  71 };
  72
  73 /*************************************************************************
  74  * Framebuffer
  75  *************************************************************************/
  76 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  77
  78 static int vision_lcd_setup(struct platform_device *pdev)
  79 {
  80         int err;
  81
  82         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  83                                 dev_name(&pdev->dev));
  84         if (err)
  85                 return err;
  86
  87         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  88                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  89                                  EP93XX_SYSCON_DEVCFG_EXVC);
  90
  91         return 0;
  92 }
  93
  94 static void vision_lcd_teardown(struct platform_device *pdev)
  95 {
  96         gpio_free(VISION_LCD_ENABLE);
  97 }
  98
  99 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
 100 {
 101         if (blank_mode)
 102                 gpio_set_value(VISION_LCD_ENABLE, 0);
 103         else
 104                 gpio_set_value(VISION_LCD_ENABLE, 1);
 105 }
 106
 107 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 108         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 109         .setup          = vision_lcd_setup,
 110         .teardown       = vision_lcd_teardown,
 111         .blank          = vision_lcd_blank,
 112 };
 113
 114
 115 /*************************************************************************
 116  * GPIO Expanders
 117  *************************************************************************/
 118 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 119 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 120 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 121 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 122
 123 static struct pca953x_platform_data pca953x_74_gpio_data = {
 124         .gpio_base      = PCA9539_74_GPIO_BASE,
 125         .irq_base       = EP93XX_BOARD_IRQ(0),
 126 };
 127
 128 static struct pca953x_platform_data pca953x_75_gpio_data = {
 129         .gpio_base      = PCA9539_75_GPIO_BASE,
 130         .irq_base       = -1,
 131 };
 132
 133 static struct pca953x_platform_data pca953x_76_gpio_data = {
 134         .gpio_base      = PCA9539_76_GPIO_BASE,
 135         .irq_base       = -1,
 136 };
 137
 138 static struct pca953x_platform_data pca953x_77_gpio_data = {
 139         .gpio_base      = PCA9539_77_GPIO_BASE,
 140         .irq_base       = -1,
 141 };
 142
 143 /*************************************************************************
 144  * I2C Bus
 145  *************************************************************************/
 146
 147 static struct i2c_board_info vision_i2c_info[] __initdata = {
 148         {
 149                 I2C_BOARD_INFO("isl1208", 0x6f),
 150                 .irq            = IRQ_EP93XX_EXT1,
 151         }, {
 152                 I2C_BOARD_INFO("pca9539", 0x74),
 153                 .platform_data  = &pca953x_74_gpio_data,
 154         }, {
 155                 I2C_BOARD_INFO("pca9539", 0x75),
 156                 .platform_data  = &pca953x_75_gpio_data,
 157         }, {
 158                 I2C_BOARD_INFO("pca9539", 0x76),
 159                 .platform_data  = &pca953x_76_gpio_data,
 160         }, {
 161                 I2C_BOARD_INFO("pca9539", 0x77),
 162                 .platform_data  = &pca953x_77_gpio_data,
 163         },
 164 };
 165
 166 /*************************************************************************
 167  * SPI CS4271 Audio Codec
 168  *************************************************************************/
 169 static struct cs4271_platform_data vision_cs4271_data = {
 170         .gpio_nreset    = EP93XX_GPIO_LINE_H(2),
 171 };
 172
 173 /*************************************************************************
 174  * SPI Flash
 175  *************************************************************************/
 176 static struct mtd_partition vision_spi_flash_partitions[] = {
 177         {
 178                 .name   = "SPI bootstrap",
 179                 .offset = 0,
 180                 .size   = SZ_4K,
 181         }, {
 182                 .name   = "Bootstrap config",
 183                 .offset = MTDPART_OFS_APPEND,
 184                 .size   = SZ_4K,
 185         }, {
 186                 .name   = "System config",
 187                 .offset = MTDPART_OFS_APPEND,
 188                 .size   = MTDPART_SIZ_FULL,
 189         },
 190 };
 191
 192 static struct flash_platform_data vision_spi_flash_data = {
 193         .name           = "SPI Flash",
 194         .parts          = vision_spi_flash_partitions,
 195         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 196 };
 197
 198 /*************************************************************************
 199  * SPI SD/MMC host
 200  *************************************************************************/
 201 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 202         .detect_delay   = 100,
 203         .powerup_msecs  = 100,
 204         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 205         .flags          = MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO,
 206         .cd_gpio        = EP93XX_GPIO_LINE_EGPIO15,
 207         .cd_debounce    = 1,
 208         .ro_gpio        = EP93XX_GPIO_LINE_F(0),
 209         .caps2          = MMC_CAP2_RO_ACTIVE_HIGH,
 210 };
 211
 212 /*************************************************************************
 213  * SPI Bus
 214  *************************************************************************/
 215 static struct spi_board_info vision_spi_board_info[] __initdata = {
 216         {
 217                 .modalias               = "cs4271",
 218                 .platform_data          = &vision_cs4271_data,
 219                 .max_speed_hz           = 6000000,
 220                 .bus_num                = 0,
 221                 .chip_select            = 0,
 222                 .mode                   = SPI_MODE_3,
 223         }, {
 224                 .modalias               = "sst25l",
 225                 .platform_data          = &vision_spi_flash_data,
 226                 .max_speed_hz           = 20000000,
 227                 .bus_num                = 0,
 228                 .chip_select            = 1,
 229                 .mode                   = SPI_MODE_3,
 230         }, {
 231                 .modalias               = "mmc_spi",
 232                 .platform_data          = &vision_spi_mmc_data,
 233                 .max_speed_hz           = 20000000,
 234                 .bus_num                = 0,
 235                 .chip_select            = 2,
 236                 .mode                   = SPI_MODE_3,
 237         },
 238 };
 239
 240 static int vision_spi_chipselects[] __initdata = {
 241         EP93XX_GPIO_LINE_EGPIO6,
 242         EP93XX_GPIO_LINE_EGPIO7,
 243         EP93XX_GPIO_LINE_G(2),
 244 };
 245
 246 static struct ep93xx_spi_info vision_spi_master __initdata = {
 247         .chipselect     = vision_spi_chipselects,
 248         .num_chipselect = ARRAY_SIZE(vision_spi_chipselects),
 249         .use_dma        = 1,
 250 };
 251
 252 /*************************************************************************
 253  * I2S Audio
 254  *************************************************************************/
 255 static struct platform_device vision_audio_device = {
 256         .name           = "edb93xx-audio",
 257         .id             = -1,
 258 };
 259
 260 static void __init vision_register_i2s(void)
 261 {
 262         ep93xx_register_i2s();
 263         platform_device_register(&vision_audio_device);
 264 }
 265
 266 /*************************************************************************
 267  * Machine Initialization
 268  *************************************************************************/
 269 static void __init vision_init_machine(void)
 270 {
 271         ep93xx_init_devices();
 272         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 273         ep93xx_register_eth(&vision_eth_data, 1);
 274         ep93xx_register_fb(&ep93xxfb_info);
 275         ep93xx_register_pwm(1, 0);
 276
 277         /*
 278          * Request the gpio expander's interrupt gpio line now to prevent
 279          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 280          */
 281         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 282                                 "pca9539:74"))
 283                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 284
 285         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 286
 287         ep93xx_register_i2c(vision_i2c_info,
 288                                 ARRAY_SIZE(vision_i2c_info));
 289         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 290                                 ARRAY_SIZE(vision_spi_board_info));
 291         vision_register_i2s();
 292 }
 293
 294 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 295         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 296         .atag_offset    = 0x100,
 297         .map_io         = vision_map_io,
 298         .init_irq       = ep93xx_init_irq,
 299         .init_time      = ep93xx_timer_init,
 300         .init_machine   = vision_init_machine,
 301         .init_late      = ep93xx_init_late,
 302         .restart        = ep93xx_restart,
 303 MACHINE_END