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/mach-types.h>
38 #include <asm/mach/map.h>
39 #include <asm/mach/arch.h>
40 
41 #include "soc.h"
42 
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 
49 static 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 
58 static 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  *************************************************************************/
68 static 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 
77 static 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 
93 static void vision_lcd_teardown(struct platform_device *pdev)
94 {
95 	gpio_free(VISION_LCD_ENABLE);
96 }
97 
98 static 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 
106 static 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 
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 Flash
173  *************************************************************************/
174 #define VISION_SPI_FLASH_CS	EP93XX_GPIO_LINE_EGPIO7
175 
176 static 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 
192 static 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 
198 static 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 
204 static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
205 {
206 	gpio_free(VISION_SPI_FLASH_CS);
207 }
208 
209 static 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 
214 static 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 
227 static 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 
232 static 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 
253 exit_err:
254 	gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
255 	return err;
256 
257 }
258 
259 static 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 
265 static int vision_spi_mmc_get_ro(struct device *pdev)
266 {
267 	return !!gpio_get_value(VISION_SPI_MMC_WP);
268 }
269 
270 static int vision_spi_mmc_get_cd(struct device *pdev)
271 {
272 	return !gpio_get_value(VISION_SPI_MMC_CD);
273 }
274 
275 static 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 
285 static 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 
291 static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
292 {
293 	gpio_free(VISION_SPI_MMC_CS);
294 }
295 
296 static 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 
301 static 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  *************************************************************************/
310 static 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 
330 static struct ep93xx_spi_info vision_spi_master __initdata = {
331 	.num_chipselect		= ARRAY_SIZE(vision_spi_board_info),
332 };
333 
334 /*************************************************************************
335  * Machine Initialization
336  *************************************************************************/
337 static 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 
353 	vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
354 
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 
361 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
362 	/* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
363 	.atag_offset	= 0x100,
364 	.map_io		= vision_map_io,
365 	.init_irq	= ep93xx_init_irq,
366 	.init_time	= ep93xx_timer_init,
367 	.init_machine	= vision_init_machine,
368 	.init_late	= ep93xx_init_late,
369 	.restart	= ep93xx_restart,
370 MACHINE_END
371