arch/arm/mach-ep93xx/vision_ep9307.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-ep93xx/vision_ep9307.c
   4  * Vision Engraving Systems EP9307 SoM support.
   5  *
   6  * Copyright (C) 2008-2011 Vision Engraving Systems
   7  * H Hartley Sweeten <hsweeten@visionengravers.com>
   8  */
   9
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/irq.h>
  16 #include <linux/gpio.h>
  17 #include <linux/gpio/machine.h>
  18 #include <linux/fb.h>
  19 #include <linux/io.h>
  20 #include <linux/mtd/partitions.h>
  21 #include <linux/i2c.h>
  22 #include <linux/platform_data/pca953x.h>
  23 #include <linux/spi/spi.h>
  24 #include <linux/spi/flash.h>
  25 #include <linux/spi/mmc_spi.h>
  26 #include <linux/mmc/host.h>
  27
  28 #include <sound/cs4271.h>
  29
  30 #include "hardware.h"
  31 #include <linux/platform_data/video-ep93xx.h>
  32 #include <linux/platform_data/spi-ep93xx.h>
  33 #include "gpio-ep93xx.h"
  34
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/map.h>
  37 #include <asm/mach/arch.h>
  38
  39 #include "soc.h"
  40
  41 /*************************************************************************
  42  * Static I/O mappings for the FPGA
  43  *************************************************************************/
  44 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  45 #define VISION_VIRT_BASE        0xfebff000
  46
  47 static struct map_desc vision_io_desc[] __initdata = {
  48         {
  49                 .virtual        = VISION_VIRT_BASE,
  50                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  51                 .length         = SZ_4K,
  52                 .type           = MT_DEVICE,
  53         },
  54 };
  55
  56 static void __init vision_map_io(void)
  57 {
  58         ep93xx_map_io();
  59
  60         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  61 }
  62
  63 /*************************************************************************
  64  * Ethernet
  65  *************************************************************************/
  66 static struct ep93xx_eth_data vision_eth_data __initdata = {
  67         .phy_id         = 1,
  68 };
  69
  70 /*************************************************************************
  71  * Framebuffer
  72  *************************************************************************/
  73 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  74
  75 static int vision_lcd_setup(struct platform_device *pdev)
  76 {
  77         int err;
  78
  79         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  80                                 dev_name(&pdev->dev));
  81         if (err)
  82                 return err;
  83
  84         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  85                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  86                                  EP93XX_SYSCON_DEVCFG_EXVC);
  87
  88         return 0;
  89 }
  90
  91 static void vision_lcd_teardown(struct platform_device *pdev)
  92 {
  93         gpio_free(VISION_LCD_ENABLE);
  94 }
  95
  96 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
  97 {
  98         if (blank_mode)
  99                 gpio_set_value(VISION_LCD_ENABLE, 0);
 100         else
 101                 gpio_set_value(VISION_LCD_ENABLE, 1);
 102 }
 103
 104 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 105         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 106         .setup          = vision_lcd_setup,
 107         .teardown       = vision_lcd_teardown,
 108         .blank          = vision_lcd_blank,
 109 };
 110
 111
 112 /*************************************************************************
 113  * GPIO Expanders
 114  *************************************************************************/
 115 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 116 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 117 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 118 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 119
 120 static struct pca953x_platform_data pca953x_74_gpio_data = {
 121         .gpio_base      = PCA9539_74_GPIO_BASE,
 122         .irq_base       = EP93XX_BOARD_IRQ(0),
 123 };
 124
 125 static struct pca953x_platform_data pca953x_75_gpio_data = {
 126         .gpio_base      = PCA9539_75_GPIO_BASE,
 127         .irq_base       = -1,
 128 };
 129
 130 static struct pca953x_platform_data pca953x_76_gpio_data = {
 131         .gpio_base      = PCA9539_76_GPIO_BASE,
 132         .irq_base       = -1,
 133 };
 134
 135 static struct pca953x_platform_data pca953x_77_gpio_data = {
 136         .gpio_base      = PCA9539_77_GPIO_BASE,
 137         .irq_base       = -1,
 138 };
 139
 140 /*************************************************************************
 141  * I2C Bus
 142  *************************************************************************/
 143
 144 static struct i2c_board_info vision_i2c_info[] __initdata = {
 145         {
 146                 I2C_BOARD_INFO("isl1208", 0x6f),
 147                 .irq            = IRQ_EP93XX_EXT1,
 148         }, {
 149                 I2C_BOARD_INFO("pca9539", 0x74),
 150                 .platform_data  = &pca953x_74_gpio_data,
 151         }, {
 152                 I2C_BOARD_INFO("pca9539", 0x75),
 153                 .platform_data  = &pca953x_75_gpio_data,
 154         }, {
 155                 I2C_BOARD_INFO("pca9539", 0x76),
 156                 .platform_data  = &pca953x_76_gpio_data,
 157         }, {
 158                 I2C_BOARD_INFO("pca9539", 0x77),
 159                 .platform_data  = &pca953x_77_gpio_data,
 160         },
 161 };
 162
 163 /*************************************************************************
 164  * SPI CS4271 Audio Codec
 165  *************************************************************************/
 166 static struct cs4271_platform_data vision_cs4271_data = {
 167         .gpio_nreset    = EP93XX_GPIO_LINE_H(2),
 168 };
 169
 170 /*************************************************************************
 171  * SPI Flash
 172  *************************************************************************/
 173 static struct mtd_partition vision_spi_flash_partitions[] = {
 174         {
 175                 .name   = "SPI bootstrap",
 176                 .offset = 0,
 177                 .size   = SZ_4K,
 178         }, {
 179                 .name   = "Bootstrap config",
 180                 .offset = MTDPART_OFS_APPEND,
 181                 .size   = SZ_4K,
 182         }, {
 183                 .name   = "System config",
 184                 .offset = MTDPART_OFS_APPEND,
 185                 .size   = MTDPART_SIZ_FULL,
 186         },
 187 };
 188
 189 static struct flash_platform_data vision_spi_flash_data = {
 190         .name           = "SPI Flash",
 191         .parts          = vision_spi_flash_partitions,
 192         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 193 };
 194
 195 /*************************************************************************
 196  * SPI SD/MMC host
 197  *************************************************************************/
 198 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 199         .detect_delay   = 100,
 200         .powerup_msecs  = 100,
 201         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 202         .caps2          = MMC_CAP2_RO_ACTIVE_HIGH,
 203 };
 204
 205 static struct gpiod_lookup_table vision_spi_mmc_gpio_table = {
 206         .dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */
 207         .table = {
 208                 /* Card detect */
 209                 GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW),
 210                 /* Write protect */
 211                 GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH),
 212                 { },
 213         },
 214 };
 215
 216 /*************************************************************************
 217  * SPI Bus
 218  *************************************************************************/
 219 static struct spi_board_info vision_spi_board_info[] __initdata = {
 220         {
 221                 .modalias               = "cs4271",
 222                 .platform_data          = &vision_cs4271_data,
 223                 .max_speed_hz           = 6000000,
 224                 .bus_num                = 0,
 225                 .chip_select            = 0,
 226                 .mode                   = SPI_MODE_3,
 227         }, {
 228                 .modalias               = "sst25l",
 229                 .platform_data          = &vision_spi_flash_data,
 230                 .max_speed_hz           = 20000000,
 231                 .bus_num                = 0,
 232                 .chip_select            = 1,
 233                 .mode                   = SPI_MODE_3,
 234         }, {
 235                 .modalias               = "mmc_spi",
 236                 .platform_data          = &vision_spi_mmc_data,
 237                 .max_speed_hz           = 20000000,
 238                 .bus_num                = 0,
 239                 .chip_select            = 2,
 240                 .mode                   = SPI_MODE_3,
 241         },
 242 };
 243
 244 static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
 245         .dev_id = "ep93xx-spi.0",
 246         .table = {
 247                 GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
 248                 GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),
 249                 GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW),
 250                 { },
 251         },
 252 };
 253
 254 static struct ep93xx_spi_info vision_spi_master __initdata = {
 255         .use_dma        = 1,
 256 };
 257
 258 /*************************************************************************
 259  * I2S Audio
 260  *************************************************************************/
 261 static struct platform_device vision_audio_device = {
 262         .name           = "edb93xx-audio",
 263         .id             = -1,
 264 };
 265
 266 static void __init vision_register_i2s(void)
 267 {
 268         ep93xx_register_i2s();
 269         platform_device_register(&vision_audio_device);
 270 }
 271
 272 /*************************************************************************
 273  * Machine Initialization
 274  *************************************************************************/
 275 static void __init vision_init_machine(void)
 276 {
 277         ep93xx_init_devices();
 278         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 279         ep93xx_register_eth(&vision_eth_data, 1);
 280         ep93xx_register_fb(&ep93xxfb_info);
 281         ep93xx_register_pwm(1, 0);
 282
 283         /*
 284          * Request the gpio expander's interrupt gpio line now to prevent
 285          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 286          */
 287         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 288                                 "pca9539:74"))
 289                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 290
 291         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 292
 293         ep93xx_register_i2c(vision_i2c_info,
 294                                 ARRAY_SIZE(vision_i2c_info));
 295         gpiod_add_lookup_table(&vision_spi_mmc_gpio_table);
 296         gpiod_add_lookup_table(&vision_spi_cs_gpio_table);
 297         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 298                                 ARRAY_SIZE(vision_spi_board_info));
 299         vision_register_i2s();
 300 }
 301
 302 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 303         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 304         .atag_offset    = 0x100,
 305         .map_io         = vision_map_io,
 306         .init_irq       = ep93xx_init_irq,
 307         .init_time      = ep93xx_timer_init,
 308         .init_machine   = vision_init_machine,
 309         .init_late      = ep93xx_init_late,
 310         .restart        = ep93xx_restart,
 311 MACHINE_END