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Linux/arch/arm/mach-ep93xx/vision_ep9307.c

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  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/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 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
148         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
149         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
150 };
151 
152 static struct i2c_board_info vision_i2c_info[] __initdata = {
153         {
154                 I2C_BOARD_INFO("isl1208", 0x6f),
155                 .irq            = IRQ_EP93XX_EXT1,
156         }, {
157                 I2C_BOARD_INFO("pca9539", 0x74),
158                 .platform_data  = &pca953x_74_gpio_data,
159         }, {
160                 I2C_BOARD_INFO("pca9539", 0x75),
161                 .platform_data  = &pca953x_75_gpio_data,
162         }, {
163                 I2C_BOARD_INFO("pca9539", 0x76),
164                 .platform_data  = &pca953x_76_gpio_data,
165         }, {
166                 I2C_BOARD_INFO("pca9539", 0x77),
167                 .platform_data  = &pca953x_77_gpio_data,
168         },
169 };
170 
171 /*************************************************************************
172  * SPI CS4271 Audio Codec
173  *************************************************************************/
174 static struct cs4271_platform_data vision_cs4271_data = {
175         .gpio_nreset    = EP93XX_GPIO_LINE_H(2),
176 };
177 
178 /*************************************************************************
179  * SPI Flash
180  *************************************************************************/
181 static struct mtd_partition vision_spi_flash_partitions[] = {
182         {
183                 .name   = "SPI bootstrap",
184                 .offset = 0,
185                 .size   = SZ_4K,
186         }, {
187                 .name   = "Bootstrap config",
188                 .offset = MTDPART_OFS_APPEND,
189                 .size   = SZ_4K,
190         }, {
191                 .name   = "System config",
192                 .offset = MTDPART_OFS_APPEND,
193                 .size   = MTDPART_SIZ_FULL,
194         },
195 };
196 
197 static struct flash_platform_data vision_spi_flash_data = {
198         .name           = "SPI Flash",
199         .parts          = vision_spi_flash_partitions,
200         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
201 };
202 
203 /*************************************************************************
204  * SPI SD/MMC host
205  *************************************************************************/
206 static struct mmc_spi_platform_data vision_spi_mmc_data = {
207         .detect_delay   = 100,
208         .powerup_msecs  = 100,
209         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
210         .flags          = MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO,
211         .cd_gpio        = EP93XX_GPIO_LINE_EGPIO15,
212         .cd_debounce    = 1,
213         .ro_gpio        = EP93XX_GPIO_LINE_F(0),
214         .caps2          = MMC_CAP2_RO_ACTIVE_HIGH,
215 };
216 
217 /*************************************************************************
218  * SPI Bus
219  *************************************************************************/
220 static struct spi_board_info vision_spi_board_info[] __initdata = {
221         {
222                 .modalias               = "cs4271",
223                 .platform_data          = &vision_cs4271_data,
224                 .max_speed_hz           = 6000000,
225                 .bus_num                = 0,
226                 .chip_select            = 0,
227                 .mode                   = SPI_MODE_3,
228         }, {
229                 .modalias               = "sst25l",
230                 .platform_data          = &vision_spi_flash_data,
231                 .max_speed_hz           = 20000000,
232                 .bus_num                = 0,
233                 .chip_select            = 1,
234                 .mode                   = SPI_MODE_3,
235         }, {
236                 .modalias               = "mmc_spi",
237                 .platform_data          = &vision_spi_mmc_data,
238                 .max_speed_hz           = 20000000,
239                 .bus_num                = 0,
240                 .chip_select            = 2,
241                 .mode                   = SPI_MODE_3,
242         },
243 };
244 
245 static int vision_spi_chipselects[] __initdata = {
246         EP93XX_GPIO_LINE_EGPIO6,
247         EP93XX_GPIO_LINE_EGPIO7,
248         EP93XX_GPIO_LINE_G(2),
249 };
250 
251 static struct ep93xx_spi_info vision_spi_master __initdata = {
252         .chipselect     = vision_spi_chipselects,
253         .num_chipselect = ARRAY_SIZE(vision_spi_chipselects),
254         .use_dma        = 1,
255 };
256 
257 /*************************************************************************
258  * I2S Audio
259  *************************************************************************/
260 static struct platform_device vision_audio_device = {
261         .name           = "edb93xx-audio",
262         .id             = -1,
263 };
264 
265 static void __init vision_register_i2s(void)
266 {
267         ep93xx_register_i2s();
268         platform_device_register(&vision_audio_device);
269 }
270 
271 /*************************************************************************
272  * Machine Initialization
273  *************************************************************************/
274 static void __init vision_init_machine(void)
275 {
276         ep93xx_init_devices();
277         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
278         ep93xx_register_eth(&vision_eth_data, 1);
279         ep93xx_register_fb(&ep93xxfb_info);
280         ep93xx_register_pwm(1, 0);
281 
282         /*
283          * Request the gpio expander's interrupt gpio line now to prevent
284          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
285          */
286         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
287                                 "pca9539:74"))
288                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
289 
290         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
291 
292         ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
293                                 ARRAY_SIZE(vision_i2c_info));
294         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
295                                 ARRAY_SIZE(vision_spi_board_info));
296         vision_register_i2s();
297 }
298 
299 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
300         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
301         .atag_offset    = 0x100,
302         .map_io         = vision_map_io,
303         .init_irq       = ep93xx_init_irq,
304         .init_time      = ep93xx_timer_init,
305         .init_machine   = vision_init_machine,
306         .init_late      = ep93xx_init_late,
307         .restart        = ep93xx_restart,
308 MACHINE_END
309 

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