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/i2c-gpio.h>
  26 #include <linux/i2c/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 <mach/hardware.h>
  33 #include <linux/platform_data/video-ep93xx.h>
  34 #include <linux/platform_data/spi-ep93xx.h>
  35 #include <mach/gpio-ep93xx.h>
  36
  37 #include <asm/hardware/vic.h>
  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         .num_modes      = EP93XXFB_USE_MODEDB,
 109         .bpp            = 16,
 110         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 111         .setup          = vision_lcd_setup,
 112         .teardown       = vision_lcd_teardown,
 113         .blank          = vision_lcd_blank,
 114 };
 115
 116
 117 /*************************************************************************
 118  * GPIO Expanders
 119  *************************************************************************/
 120 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 121 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 122 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 123 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 124
 125 static struct pca953x_platform_data pca953x_74_gpio_data = {
 126         .gpio_base      = PCA9539_74_GPIO_BASE,
 127         .irq_base       = EP93XX_BOARD_IRQ(0),
 128 };
 129
 130 static struct pca953x_platform_data pca953x_75_gpio_data = {
 131         .gpio_base      = PCA9539_75_GPIO_BASE,
 132         .irq_base       = -1,
 133 };
 134
 135 static struct pca953x_platform_data pca953x_76_gpio_data = {
 136         .gpio_base      = PCA9539_76_GPIO_BASE,
 137         .irq_base       = -1,
 138 };
 139
 140 static struct pca953x_platform_data pca953x_77_gpio_data = {
 141         .gpio_base      = PCA9539_77_GPIO_BASE,
 142         .irq_base       = -1,
 143 };
 144
 145 /*************************************************************************
 146  * I2C Bus
 147  *************************************************************************/
 148 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
 149         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 150         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 151 };
 152
 153 static struct i2c_board_info vision_i2c_info[] __initdata = {
 154         {
 155                 I2C_BOARD_INFO("isl1208", 0x6f),
 156                 .irq            = IRQ_EP93XX_EXT1,
 157         }, {
 158                 I2C_BOARD_INFO("pca9539", 0x74),
 159                 .platform_data  = &pca953x_74_gpio_data,
 160         }, {
 161                 I2C_BOARD_INFO("pca9539", 0x75),
 162                 .platform_data  = &pca953x_75_gpio_data,
 163         }, {
 164                 I2C_BOARD_INFO("pca9539", 0x76),
 165                 .platform_data  = &pca953x_76_gpio_data,
 166         }, {
 167                 I2C_BOARD_INFO("pca9539", 0x77),
 168                 .platform_data  = &pca953x_77_gpio_data,
 169         },
 170 };
 171
 172 /*************************************************************************
 173  * SPI Flash
 174  *************************************************************************/
 175 #define VISION_SPI_FLASH_CS     EP93XX_GPIO_LINE_EGPIO7
 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 static int vision_spi_flash_hw_setup(struct spi_device *spi)
 200 {
 201         return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
 202                                 spi->modalias);
 203 }
 204
 205 static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
 206 {
 207         gpio_free(VISION_SPI_FLASH_CS);
 208 }
 209
 210 static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
 211 {
 212         gpio_set_value(VISION_SPI_FLASH_CS, value);
 213 }
 214
 215 static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
 216         .setup          = vision_spi_flash_hw_setup,
 217         .cleanup        = vision_spi_flash_hw_cleanup,
 218         .cs_control     = vision_spi_flash_hw_cs_control,
 219 };
 220
 221 /*************************************************************************
 222  * SPI SD/MMC host
 223  *************************************************************************/
 224 #define VISION_SPI_MMC_CS       EP93XX_GPIO_LINE_G(2)
 225 #define VISION_SPI_MMC_WP       EP93XX_GPIO_LINE_F(0)
 226 #define VISION_SPI_MMC_CD       EP93XX_GPIO_LINE_EGPIO15
 227
 228 static struct gpio vision_spi_mmc_gpios[] = {
 229         { VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
 230         { VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
 231 };
 232
 233 static int vision_spi_mmc_init(struct device *pdev,
 234                         irqreturn_t (*func)(int, void *), void *pdata)
 235 {
 236         int err;
 237
 238         err = gpio_request_array(vision_spi_mmc_gpios,
 239                                  ARRAY_SIZE(vision_spi_mmc_gpios));
 240         if (err)
 241                 return err;
 242
 243         err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
 244         if (err)
 245                 goto exit_err;
 246
 247         err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
 248                         IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
 249         if (err)
 250                 goto exit_err;
 251
 252         return 0;
 253
 254 exit_err:
 255         gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
 256         return err;
 257
 258 }
 259
 260 static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
 261 {
 262         free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
 263         gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
 264 }
 265
 266 static int vision_spi_mmc_get_ro(struct device *pdev)
 267 {
 268         return !!gpio_get_value(VISION_SPI_MMC_WP);
 269 }
 270
 271 static int vision_spi_mmc_get_cd(struct device *pdev)
 272 {
 273         return !gpio_get_value(VISION_SPI_MMC_CD);
 274 }
 275
 276 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 277         .init           = vision_spi_mmc_init,
 278         .exit           = vision_spi_mmc_exit,
 279         .get_ro         = vision_spi_mmc_get_ro,
 280         .get_cd         = vision_spi_mmc_get_cd,
 281         .detect_delay   = 100,
 282         .powerup_msecs  = 100,
 283         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 284 };
 285
 286 static int vision_spi_mmc_hw_setup(struct spi_device *spi)
 287 {
 288         return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
 289                                 spi->modalias);
 290 }
 291
 292 static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
 293 {
 294         gpio_free(VISION_SPI_MMC_CS);
 295 }
 296
 297 static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
 298 {
 299         gpio_set_value(VISION_SPI_MMC_CS, value);
 300 }
 301
 302 static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
 303         .setup          = vision_spi_mmc_hw_setup,
 304         .cleanup        = vision_spi_mmc_hw_cleanup,
 305         .cs_control     = vision_spi_mmc_hw_cs_control,
 306 };
 307
 308 /*************************************************************************
 309  * SPI Bus
 310  *************************************************************************/
 311 static struct spi_board_info vision_spi_board_info[] __initdata = {
 312         {
 313                 .modalias               = "sst25l",
 314                 .platform_data          = &vision_spi_flash_data,
 315                 .controller_data        = &vision_spi_flash_hw,
 316                 .max_speed_hz           = 20000000,
 317                 .bus_num                = 0,
 318                 .chip_select            = 0,
 319                 .mode                   = SPI_MODE_3,
 320         }, {
 321                 .modalias               = "mmc_spi",
 322                 .platform_data          = &vision_spi_mmc_data,
 323                 .controller_data        = &vision_spi_mmc_hw,
 324                 .max_speed_hz           = 20000000,
 325                 .bus_num                = 0,
 326                 .chip_select            = 1,
 327                 .mode                   = SPI_MODE_3,
 328         },
 329 };
 330
 331 static struct ep93xx_spi_info vision_spi_master __initdata = {
 332         .num_chipselect         = ARRAY_SIZE(vision_spi_board_info),
 333 };
 334
 335 /*************************************************************************
 336  * Machine Initialization
 337  *************************************************************************/
 338 static void __init vision_init_machine(void)
 339 {
 340         ep93xx_init_devices();
 341         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 342         ep93xx_register_eth(&vision_eth_data, 1);
 343         ep93xx_register_fb(&ep93xxfb_info);
 344         ep93xx_register_pwm(1, 0);
 345
 346         /*
 347          * Request the gpio expander's interrupt gpio line now to prevent
 348          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 349          */
 350         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 351                                 "pca9539:74"))
 352                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 353
 354         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 355
 356         ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
 357                                 ARRAY_SIZE(vision_i2c_info));
 358         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 359                                 ARRAY_SIZE(vision_spi_board_info));
 360 }
 361
 362 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 363         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 364         .atag_offset    = 0x100,
 365         .map_io         = vision_map_io,
 366         .init_irq       = ep93xx_init_irq,
 367         .handle_irq     = vic_handle_irq,
 368         .timer          = &ep93xx_timer,
 369         .init_machine   = vision_init_machine,
 370         .init_late      = ep93xx_init_late,
 371         .restart        = ep93xx_restart,
 372 MACHINE_END