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/gpio/machine.h>
22 #include <linux/fb.h>
23 #include <linux/io.h>
24 #include <linux/mtd/partitions.h>
25 #include <linux/i2c.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 "hardware.h"
35 #include <linux/platform_data/video-ep93xx.h>
36 #include <linux/platform_data/spi-ep93xx.h>
37 #include "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 
148 static struct i2c_board_info vision_i2c_info[] __initdata = {
149 	{
150 		I2C_BOARD_INFO("isl1208", 0x6f),
151 		.irq		= IRQ_EP93XX_EXT1,
152 	}, {
153 		I2C_BOARD_INFO("pca9539", 0x74),
154 		.platform_data	= &pca953x_74_gpio_data,
155 	}, {
156 		I2C_BOARD_INFO("pca9539", 0x75),
157 		.platform_data	= &pca953x_75_gpio_data,
158 	}, {
159 		I2C_BOARD_INFO("pca9539", 0x76),
160 		.platform_data	= &pca953x_76_gpio_data,
161 	}, {
162 		I2C_BOARD_INFO("pca9539", 0x77),
163 		.platform_data	= &pca953x_77_gpio_data,
164 	},
165 };
166 
167 /*************************************************************************
168  * SPI CS4271 Audio Codec
169  *************************************************************************/
170 static struct cs4271_platform_data vision_cs4271_data = {
171 	.gpio_nreset	= EP93XX_GPIO_LINE_H(2),
172 };
173 
174 /*************************************************************************
175  * SPI Flash
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 /*************************************************************************
200  * SPI SD/MMC host
201  *************************************************************************/
202 static struct mmc_spi_platform_data vision_spi_mmc_data = {
203 	.detect_delay	= 100,
204 	.powerup_msecs	= 100,
205 	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
206 	.caps2		= MMC_CAP2_RO_ACTIVE_HIGH,
207 };
208 
209 static struct gpiod_lookup_table vision_spi_mmc_gpio_table = {
210 	.dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */
211 	.table = {
212 		/* Card detect */
213 		GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW),
214 		/* Write protect */
215 		GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH),
216 		{ },
217 	},
218 };
219 
220 /*************************************************************************
221  * SPI Bus
222  *************************************************************************/
223 static struct spi_board_info vision_spi_board_info[] __initdata = {
224 	{
225 		.modalias		= "cs4271",
226 		.platform_data		= &vision_cs4271_data,
227 		.max_speed_hz		= 6000000,
228 		.bus_num		= 0,
229 		.chip_select		= 0,
230 		.mode			= SPI_MODE_3,
231 	}, {
232 		.modalias		= "sst25l",
233 		.platform_data		= &vision_spi_flash_data,
234 		.max_speed_hz		= 20000000,
235 		.bus_num		= 0,
236 		.chip_select		= 1,
237 		.mode			= SPI_MODE_3,
238 	}, {
239 		.modalias		= "mmc_spi",
240 		.platform_data		= &vision_spi_mmc_data,
241 		.max_speed_hz		= 20000000,
242 		.bus_num		= 0,
243 		.chip_select		= 2,
244 		.mode			= SPI_MODE_3,
245 	},
246 };
247 
248 static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
249 	.dev_id = "ep93xx-spi.0",
250 	.table = {
251 		GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
252 		GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),
253 		GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW),
254 		{ },
255 	},
256 };
257 
258 static struct ep93xx_spi_info vision_spi_master __initdata = {
259 	.use_dma	= 1,
260 };
261 
262 /*************************************************************************
263  * I2S Audio
264  *************************************************************************/
265 static struct platform_device vision_audio_device = {
266 	.name		= "edb93xx-audio",
267 	.id		= -1,
268 };
269 
270 static void __init vision_register_i2s(void)
271 {
272 	ep93xx_register_i2s();
273 	platform_device_register(&vision_audio_device);
274 }
275 
276 /*************************************************************************
277  * Machine Initialization
278  *************************************************************************/
279 static void __init vision_init_machine(void)
280 {
281 	ep93xx_init_devices();
282 	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
283 	ep93xx_register_eth(&vision_eth_data, 1);
284 	ep93xx_register_fb(&ep93xxfb_info);
285 	ep93xx_register_pwm(1, 0);
286 
287 	/*
288 	 * Request the gpio expander's interrupt gpio line now to prevent
289 	 * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
290 	 */
291 	if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
292 				"pca9539:74"))
293 		pr_warn("cannot request interrupt gpio for pca9539:74\n");
294 
295 	vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
296 
297 	ep93xx_register_i2c(vision_i2c_info,
298 				ARRAY_SIZE(vision_i2c_info));
299 	gpiod_add_lookup_table(&vision_spi_mmc_gpio_table);
300 	gpiod_add_lookup_table(&vision_spi_cs_gpio_table);
301 	ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
302 				ARRAY_SIZE(vision_spi_board_info));
303 	vision_register_i2s();
304 }
305 
306 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
307 	/* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
308 	.atag_offset	= 0x100,
309 	.map_io		= vision_map_io,
310 	.init_irq	= ep93xx_init_irq,
311 	.init_time	= ep93xx_timer_init,
312 	.init_machine	= vision_init_machine,
313 	.init_late	= ep93xx_init_late,
314 	.restart	= ep93xx_restart,
315 MACHINE_END
316