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/gpio/machine.h>
  22 #include <linux/fb.h>
  23 #include <linux/io.h>
  24 #include <linux/mtd/partitions.h>
  25 #include <linux/i2c.h>
  26 #include <linux/platform_data/pca953x.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/spi/flash.h>
  29 #include <linux/spi/mmc_spi.h>
  30 #include <linux/mmc/host.h>
  31
  32 #include <sound/cs4271.h>
  33
  34 #include <mach/hardware.h>
  35 #include <linux/platform_data/video-ep93xx.h>
  36 #include <linux/platform_data/spi-ep93xx.h>
  37 #include <mach/gpio-ep93xx.h>
  38
  39 #include <asm/mach-types.h>
  40 #include <asm/mach/map.h>
  41 #include <asm/mach/arch.h>
  42
  43 #include "soc.h"
  44
  45 /*************************************************************************
  46  * Static I/O mappings for the FPGA
  47  *************************************************************************/
  48 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  49 #define VISION_VIRT_BASE        0xfebff000
  50
  51 static struct map_desc vision_io_desc[] __initdata = {
  52         {
  53                 .virtual        = VISION_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  55                 .length         = SZ_4K,
  56                 .type           = MT_DEVICE,
  57         },
  58 };
  59
  60 static void __init vision_map_io(void)
  61 {
  62         ep93xx_map_io();
  63
  64         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  65 }
  66
  67 /*************************************************************************
  68  * Ethernet
  69  *************************************************************************/
  70 static struct ep93xx_eth_data vision_eth_data __initdata = {
  71         .phy_id         = 1,
  72 };
  73
  74 /*************************************************************************
  75  * Framebuffer
  76  *************************************************************************/
  77 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  78
  79 static int vision_lcd_setup(struct platform_device *pdev)
  80 {
  81         int err;
  82
  83         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  84                                 dev_name(&pdev->dev));
  85         if (err)
  86                 return err;
  87
  88         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  89                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  90                                  EP93XX_SYSCON_DEVCFG_EXVC);
  91
  92         return 0;
  93 }
  94
  95 static void vision_lcd_teardown(struct platform_device *pdev)
  96 {
  97         gpio_free(VISION_LCD_ENABLE);
  98 }
  99
 100 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
 101 {
 102         if (blank_mode)
 103                 gpio_set_value(VISION_LCD_ENABLE, 0);
 104         else
 105                 gpio_set_value(VISION_LCD_ENABLE, 1);
 106 }
 107
 108 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 109         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 110         .setup          = vision_lcd_setup,
 111         .teardown       = vision_lcd_teardown,
 112         .blank          = vision_lcd_blank,
 113 };
 114
 115
 116 /*************************************************************************
 117  * GPIO Expanders
 118  *************************************************************************/
 119 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 120 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 121 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 122 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 123
 124 static struct pca953x_platform_data pca953x_74_gpio_data = {
 125         .gpio_base      = PCA9539_74_GPIO_BASE,
 126         .irq_base       = EP93XX_BOARD_IRQ(0),
 127 };
 128
 129 static struct pca953x_platform_data pca953x_75_gpio_data = {
 130         .gpio_base      = PCA9539_75_GPIO_BASE,
 131         .irq_base       = -1,
 132 };
 133
 134 static struct pca953x_platform_data pca953x_76_gpio_data = {
 135         .gpio_base      = PCA9539_76_GPIO_BASE,
 136         .irq_base       = -1,
 137 };
 138
 139 static struct pca953x_platform_data pca953x_77_gpio_data = {
 140         .gpio_base      = PCA9539_77_GPIO_BASE,
 141         .irq_base       = -1,
 142 };
 143
 144 /*************************************************************************
 145  * I2C Bus
 146  *************************************************************************/
 147
 148 static struct i2c_board_info vision_i2c_info[] __initdata = {
 149         {
 150                 I2C_BOARD_INFO("isl1208", 0x6f),
 151                 .irq            = IRQ_EP93XX_EXT1,
 152         }, {
 153                 I2C_BOARD_INFO("pca9539", 0x74),
 154                 .platform_data  = &pca953x_74_gpio_data,
 155         }, {
 156                 I2C_BOARD_INFO("pca9539", 0x75),
 157                 .platform_data  = &pca953x_75_gpio_data,
 158         }, {
 159                 I2C_BOARD_INFO("pca9539", 0x76),
 160                 .platform_data  = &pca953x_76_gpio_data,
 161         }, {
 162                 I2C_BOARD_INFO("pca9539", 0x77),
 163                 .platform_data  = &pca953x_77_gpio_data,
 164         },
 165 };
 166
 167 /*************************************************************************
 168  * SPI CS4271 Audio Codec
 169  *************************************************************************/
 170 static struct cs4271_platform_data vision_cs4271_data = {
 171         .gpio_nreset    = EP93XX_GPIO_LINE_H(2),
 172 };
 173
 174 /*************************************************************************
 175  * SPI Flash
 176  *************************************************************************/
 177 static struct mtd_partition vision_spi_flash_partitions[] = {
 178         {
 179                 .name   = "SPI bootstrap",
 180                 .offset = 0,
 181                 .size   = SZ_4K,
 182         }, {
 183                 .name   = "Bootstrap config",
 184                 .offset = MTDPART_OFS_APPEND,
 185                 .size   = SZ_4K,
 186         }, {
 187                 .name   = "System config",
 188                 .offset = MTDPART_OFS_APPEND,
 189                 .size   = MTDPART_SIZ_FULL,
 190         },
 191 };
 192
 193 static struct flash_platform_data vision_spi_flash_data = {
 194         .name           = "SPI Flash",
 195         .parts          = vision_spi_flash_partitions,
 196         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 197 };
 198
 199 /*************************************************************************
 200  * SPI SD/MMC host
 201  *************************************************************************/
 202 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 203         .detect_delay   = 100,
 204         .powerup_msecs  = 100,
 205         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 206         .caps2          = MMC_CAP2_RO_ACTIVE_HIGH,
 207 };
 208
 209 static struct gpiod_lookup_table vision_spi_mmc_gpio_table = {
 210         .dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */
 211         .table = {
 212                 /* Card detect */
 213                 GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW),
 214                 /* Write protect */
 215                 GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH),
 216                 { },
 217         },
 218 };
 219
 220 /*************************************************************************
 221  * SPI Bus
 222  *************************************************************************/
 223 static struct spi_board_info vision_spi_board_info[] __initdata = {
 224         {
 225                 .modalias               = "cs4271",
 226                 .platform_data          = &vision_cs4271_data,
 227                 .max_speed_hz           = 6000000,
 228                 .bus_num                = 0,
 229                 .chip_select            = 0,
 230                 .mode                   = SPI_MODE_3,
 231         }, {
 232                 .modalias               = "sst25l",
 233                 .platform_data          = &vision_spi_flash_data,
 234                 .max_speed_hz           = 20000000,
 235                 .bus_num                = 0,
 236                 .chip_select            = 1,
 237                 .mode                   = SPI_MODE_3,
 238         }, {
 239                 .modalias               = "mmc_spi",
 240                 .platform_data          = &vision_spi_mmc_data,
 241                 .max_speed_hz           = 20000000,
 242                 .bus_num                = 0,
 243                 .chip_select            = 2,
 244                 .mode                   = SPI_MODE_3,
 245         },
 246 };
 247
 248 static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
 249         .dev_id = "ep93xx-spi.0",
 250         .table = {
 251                 GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
 252                 GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),
 253                 GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW),
 254                 { },
 255         },
 256 };
 257
 258 static struct ep93xx_spi_info vision_spi_master __initdata = {
 259         .use_dma        = 1,
 260 };
 261
 262 /*************************************************************************
 263  * I2S Audio
 264  *************************************************************************/
 265 static struct platform_device vision_audio_device = {
 266         .name           = "edb93xx-audio",
 267         .id             = -1,
 268 };
 269
 270 static void __init vision_register_i2s(void)
 271 {
 272         ep93xx_register_i2s();
 273         platform_device_register(&vision_audio_device);
 274 }
 275
 276 /*************************************************************************
 277  * Machine Initialization
 278  *************************************************************************/
 279 static void __init vision_init_machine(void)
 280 {
 281         ep93xx_init_devices();
 282         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 283         ep93xx_register_eth(&vision_eth_data, 1);
 284         ep93xx_register_fb(&ep93xxfb_info);
 285         ep93xx_register_pwm(1, 0);
 286
 287         /*
 288          * Request the gpio expander's interrupt gpio line now to prevent
 289          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 290          */
 291         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 292                                 "pca9539:74"))
 293                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 294
 295         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 296
 297         ep93xx_register_i2c(vision_i2c_info,
 298                                 ARRAY_SIZE(vision_i2c_info));
 299         gpiod_add_lookup_table(&vision_spi_mmc_gpio_table);
 300         gpiod_add_lookup_table(&vision_spi_cs_gpio_table);
 301         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 302                                 ARRAY_SIZE(vision_spi_board_info));
 303         vision_register_i2s();
 304 }
 305
 306 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 307         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 308         .atag_offset    = 0x100,
 309         .map_io         = vision_map_io,
 310         .init_irq       = ep93xx_init_irq,
 311         .init_time      = ep93xx_timer_init,
 312         .init_machine   = vision_init_machine,
 313         .init_late      = ep93xx_init_late,
 314         .restart        = ep93xx_restart,
 315 MACHINE_END