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 <mach/fb.h>
34 #include <mach/ep93xx_spi.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
373