projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: mmc_spi: Support CD/RO GPIOs
[deliverable/linux.git] / arch / arm / mach-ep93xx / vision_ep9307.c
CommitLineData
1cb17e2d
HS		 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>
a3b29245
AB		 33#include <linux/platform_data/video-ep93xx.h>
34#include <linux/platform_data/spi-ep93xx.h>
e9c6c5df 35#include <mach/gpio-ep93xx.h>
1cb17e2d
HS		 36
37#include <asm/mach-types.h>
38#include <asm/mach/map.h>
39#include <asm/mach/arch.h>
40
258249ec
RM		 41#include "soc.h"
42
1cb17e2d
HS		 43/*************************************************************************
44 * Static I/O mappings for the FPGA
45 *************************************************************************/
46#define VISION_PHYS_BASE EP93XX_CS7_PHYS_BASE
47#define VISION_VIRT_BASE 0xfebff000
48
49static struct map_desc vision_io_desc[] __initdata = {
50 {
51 .virtual = VISION_VIRT_BASE,
52 .pfn = __phys_to_pfn(VISION_PHYS_BASE),
53 .length = SZ_4K,
54 .type = MT_DEVICE,
55 },
56};
57
58static void __init vision_map_io(void)
59{
60 ep93xx_map_io();
61
62 iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
63}
64
65/*************************************************************************
66 * Ethernet
67 *************************************************************************/
68static struct ep93xx_eth_data vision_eth_data __initdata = {
69 .phy_id = 1,
70};
71
72/*************************************************************************
73 * Framebuffer
74 *************************************************************************/
75#define VISION_LCD_ENABLE EP93XX_GPIO_LINE_EGPIO1
76
77static int vision_lcd_setup(struct platform_device *pdev)
78{
79 int err;
80
81 err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
82 dev_name(&pdev->dev));
83 if (err)
84 return err;
85
86 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
87 EP93XX_SYSCON_DEVCFG_RASONP3 |
88 EP93XX_SYSCON_DEVCFG_EXVC);
89
90 return 0;
91}
92
93static void vision_lcd_teardown(struct platform_device *pdev)
94{
95 gpio_free(VISION_LCD_ENABLE);
96}
97
98static void vision_lcd_blank(int blank_mode, struct fb_info *info)
99{
100 if (blank_mode)
101 gpio_set_value(VISION_LCD_ENABLE, 0);
102 else
103 gpio_set_value(VISION_LCD_ENABLE, 1);
104}
105
106static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
107 .num_modes = EP93XXFB_USE_MODEDB,
108 .bpp = 16,
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
124static struct pca953x_platform_data pca953x_74_gpio_data = {
125 .gpio_base = PCA9539_74_GPIO_BASE,
126 .irq_base = EP93XX_BOARD_IRQ(0),
127};
128
129static struct pca953x_platform_data pca953x_75_gpio_data = {
130 .gpio_base = PCA9539_75_GPIO_BASE,
131 .irq_base = -1,
132};
133
134static struct pca953x_platform_data pca953x_76_gpio_data = {
135 .gpio_base = PCA9539_76_GPIO_BASE,
136 .irq_base = -1,
137};
138
139static 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 *************************************************************************/
147static 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
152static 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,
1cb17e2d
HS		 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 Flash
173 *************************************************************************/
174#define VISION_SPI_FLASH_CS EP93XX_GPIO_LINE_EGPIO7
175
176static 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
192static 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
198static int vision_spi_flash_hw_setup(struct spi_device *spi)
199{
200 return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
201 spi->modalias);
202}
203
204static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
205{
206 gpio_free(VISION_SPI_FLASH_CS);
207}
208
209static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
210{
211 gpio_set_value(VISION_SPI_FLASH_CS, value);
212}
213
214static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
215 .setup = vision_spi_flash_hw_setup,
216 .cleanup = vision_spi_flash_hw_cleanup,
217 .cs_control = vision_spi_flash_hw_cs_control,
218};
219
220/*************************************************************************
221 * SPI SD/MMC host
222 *************************************************************************/
223#define VISION_SPI_MMC_CS EP93XX_GPIO_LINE_G(2)
224#define VISION_SPI_MMC_WP EP93XX_GPIO_LINE_F(0)
225#define VISION_SPI_MMC_CD EP93XX_GPIO_LINE_EGPIO15
226
227static struct gpio vision_spi_mmc_gpios[] = {
228 { VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
229 { VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
230};
231
232static int vision_spi_mmc_init(struct device *pdev,
233 irqreturn_t (*func)(int, void *), void *pdata)
234{
235 int err;
236
237 err = gpio_request_array(vision_spi_mmc_gpios,
238 ARRAY_SIZE(vision_spi_mmc_gpios));
239 if (err)
240 return err;
241
242 err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
243 if (err)
244 goto exit_err;
245
246 err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
247 IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
248 if (err)
249 goto exit_err;
250
251 return 0;
252
253exit_err:
254 gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
255 return err;
256
257}
258
259static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
260{
261 free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
262 gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
263}
264
265static int vision_spi_mmc_get_ro(struct device *pdev)
266{
267 return !!gpio_get_value(VISION_SPI_MMC_WP);
268}
269
270static int vision_spi_mmc_get_cd(struct device *pdev)
271{
272 return !gpio_get_value(VISION_SPI_MMC_CD);
273}
274
275static struct mmc_spi_platform_data vision_spi_mmc_data = {
276 .init = vision_spi_mmc_init,
277 .exit = vision_spi_mmc_exit,
278 .get_ro = vision_spi_mmc_get_ro,
279 .get_cd = vision_spi_mmc_get_cd,
280 .detect_delay = 100,
281 .powerup_msecs = 100,
282 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
283};
284
285static int vision_spi_mmc_hw_setup(struct spi_device *spi)
286{
287 return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
288 spi->modalias);
289}
290
291static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
292{
293 gpio_free(VISION_SPI_MMC_CS);
294}
295
296static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
297{
298 gpio_set_value(VISION_SPI_MMC_CS, value);
299}
300
301static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
302 .setup = vision_spi_mmc_hw_setup,
303 .cleanup = vision_spi_mmc_hw_cleanup,
304 .cs_control = vision_spi_mmc_hw_cs_control,
305};
306
307/*************************************************************************
308 * SPI Bus
309 *************************************************************************/
310static struct spi_board_info vision_spi_board_info[] __initdata = {
311 {
312 .modalias = "sst25l",
313 .platform_data = &vision_spi_flash_data,
314 .controller_data = &vision_spi_flash_hw,
315 .max_speed_hz = 20000000,
316 .bus_num = 0,
317 .chip_select = 0,
318 .mode = SPI_MODE_3,
319 }, {
320 .modalias = "mmc_spi",
321 .platform_data = &vision_spi_mmc_data,
322 .controller_data = &vision_spi_mmc_hw,
323 .max_speed_hz = 20000000,
324 .bus_num = 0,
325 .chip_select = 1,
326 .mode = SPI_MODE_3,
327 },
328};
329
330static struct ep93xx_spi_info vision_spi_master __initdata = {
331 .num_chipselect = ARRAY_SIZE(vision_spi_board_info),
332};
333
334/*************************************************************************
335 * Machine Initialization
336 *************************************************************************/
337static void __init vision_init_machine(void)
338{
339 ep93xx_init_devices();
340 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
341 ep93xx_register_eth(&vision_eth_data, 1);
342 ep93xx_register_fb(&ep93xxfb_info);
343 ep93xx_register_pwm(1, 0);
344
345 /*
346 * Request the gpio expander's interrupt gpio line now to prevent
347 * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
348 */
349 if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
350 "pca9539:74"))
351 pr_warn("cannot request interrupt gpio for pca9539:74\n");
352
e9c6c5df
HS		 353 vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
354
1cb17e2d
HS		 355 ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
356 ARRAY_SIZE(vision_i2c_info));
357 ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
358 ARRAY_SIZE(vision_spi_board_info));
359}
360
361MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
362 /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
a7fadac1 363 .atag_offset = 0x100,
1cb17e2d
HS		 364 .map_io = vision_map_io,
365 .init_irq = ep93xx_init_irq,
6bb27d73 366 .init_time = ep93xx_timer_init,
1cb17e2d 367 .init_machine = vision_init_machine,
c914283f 368 .init_late = ep93xx_init_late,
3275166e 369 .restart = ep93xx_restart,
1cb17e2d 370MACHINE_END
Linux kernel - Deliverables
This page took 0.112162 seconds and 5 git commands to generate.