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/platform_data/pca953x.h>
26 #include <linux/spi/spi.h>
27 #include <linux/spi/flash.h>
28 #include <linux/spi/mmc_spi.h>
29 #include <linux/mmc/host.h>
30 
31 #include <sound/cs4271.h>
32 
33 #include <mach/hardware.h>
34 #include <linux/platform_data/video-ep93xx.h>
35 #include <linux/platform_data/spi-ep93xx.h>
36 #include <mach/gpio-ep93xx.h>
37 
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 	.flags		= EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
109 	.setup		= vision_lcd_setup,
110 	.teardown	= vision_lcd_teardown,
111 	.blank		= vision_lcd_blank,
112 };
113 
114 
115 /*************************************************************************
116  * GPIO Expanders
117  *************************************************************************/
118 #define PCA9539_74_GPIO_BASE	(EP93XX_GPIO_LINE_MAX + 1)
119 #define PCA9539_75_GPIO_BASE	(PCA9539_74_GPIO_BASE + 16)
120 #define PCA9539_76_GPIO_BASE	(PCA9539_75_GPIO_BASE + 16)
121 #define PCA9539_77_GPIO_BASE	(PCA9539_76_GPIO_BASE + 16)
122 
123 static struct pca953x_platform_data pca953x_74_gpio_data = {
124 	.gpio_base	= PCA9539_74_GPIO_BASE,
125 	.irq_base	= EP93XX_BOARD_IRQ(0),
126 };
127 
128 static struct pca953x_platform_data pca953x_75_gpio_data = {
129 	.gpio_base	= PCA9539_75_GPIO_BASE,
130 	.irq_base	= -1,
131 };
132 
133 static struct pca953x_platform_data pca953x_76_gpio_data = {
134 	.gpio_base	= PCA9539_76_GPIO_BASE,
135 	.irq_base	= -1,
136 };
137 
138 static struct pca953x_platform_data pca953x_77_gpio_data = {
139 	.gpio_base	= PCA9539_77_GPIO_BASE,
140 	.irq_base	= -1,
141 };
142 
143 /*************************************************************************
144  * I2C Bus
145  *************************************************************************/
146 
147 static struct i2c_board_info vision_i2c_info[] __initdata = {
148 	{
149 		I2C_BOARD_INFO("isl1208", 0x6f),
150 		.irq		= IRQ_EP93XX_EXT1,
151 	}, {
152 		I2C_BOARD_INFO("pca9539", 0x74),
153 		.platform_data	= &pca953x_74_gpio_data,
154 	}, {
155 		I2C_BOARD_INFO("pca9539", 0x75),
156 		.platform_data	= &pca953x_75_gpio_data,
157 	}, {
158 		I2C_BOARD_INFO("pca9539", 0x76),
159 		.platform_data	= &pca953x_76_gpio_data,
160 	}, {
161 		I2C_BOARD_INFO("pca9539", 0x77),
162 		.platform_data	= &pca953x_77_gpio_data,
163 	},
164 };
165 
166 /*************************************************************************
167  * SPI CS4271 Audio Codec
168  *************************************************************************/
169 static struct cs4271_platform_data vision_cs4271_data = {
170 	.gpio_nreset	= EP93XX_GPIO_LINE_H(2),
171 };
172 
173 /*************************************************************************
174  * SPI Flash
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 /*************************************************************************
199  * SPI SD/MMC host
200  *************************************************************************/
201 static struct mmc_spi_platform_data vision_spi_mmc_data = {
202 	.detect_delay	= 100,
203 	.powerup_msecs	= 100,
204 	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
205 	.flags		= MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO,
206 	.cd_gpio	= EP93XX_GPIO_LINE_EGPIO15,
207 	.cd_debounce	= 1,
208 	.ro_gpio	= EP93XX_GPIO_LINE_F(0),
209 	.caps2		= MMC_CAP2_RO_ACTIVE_HIGH,
210 };
211 
212 /*************************************************************************
213  * SPI Bus
214  *************************************************************************/
215 static struct spi_board_info vision_spi_board_info[] __initdata = {
216 	{
217 		.modalias		= "cs4271",
218 		.platform_data		= &vision_cs4271_data,
219 		.max_speed_hz		= 6000000,
220 		.bus_num		= 0,
221 		.chip_select		= 0,
222 		.mode			= SPI_MODE_3,
223 	}, {
224 		.modalias		= "sst25l",
225 		.platform_data		= &vision_spi_flash_data,
226 		.max_speed_hz		= 20000000,
227 		.bus_num		= 0,
228 		.chip_select		= 1,
229 		.mode			= SPI_MODE_3,
230 	}, {
231 		.modalias		= "mmc_spi",
232 		.platform_data		= &vision_spi_mmc_data,
233 		.max_speed_hz		= 20000000,
234 		.bus_num		= 0,
235 		.chip_select		= 2,
236 		.mode			= SPI_MODE_3,
237 	},
238 };
239 
240 static int vision_spi_chipselects[] __initdata = {
241 	EP93XX_GPIO_LINE_EGPIO6,
242 	EP93XX_GPIO_LINE_EGPIO7,
243 	EP93XX_GPIO_LINE_G(2),
244 };
245 
246 static struct ep93xx_spi_info vision_spi_master __initdata = {
247 	.chipselect	= vision_spi_chipselects,
248 	.num_chipselect	= ARRAY_SIZE(vision_spi_chipselects),
249 	.use_dma	= 1,
250 };
251 
252 /*************************************************************************
253  * I2S Audio
254  *************************************************************************/
255 static struct platform_device vision_audio_device = {
256 	.name		= "edb93xx-audio",
257 	.id		= -1,
258 };
259 
260 static void __init vision_register_i2s(void)
261 {
262 	ep93xx_register_i2s();
263 	platform_device_register(&vision_audio_device);
264 }
265 
266 /*************************************************************************
267  * Machine Initialization
268  *************************************************************************/
269 static void __init vision_init_machine(void)
270 {
271 	ep93xx_init_devices();
272 	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
273 	ep93xx_register_eth(&vision_eth_data, 1);
274 	ep93xx_register_fb(&ep93xxfb_info);
275 	ep93xx_register_pwm(1, 0);
276 
277 	/*
278 	 * Request the gpio expander's interrupt gpio line now to prevent
279 	 * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
280 	 */
281 	if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
282 				"pca9539:74"))
283 		pr_warn("cannot request interrupt gpio for pca9539:74\n");
284 
285 	vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
286 
287 	ep93xx_register_i2c(vision_i2c_info,
288 				ARRAY_SIZE(vision_i2c_info));
289 	ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
290 				ARRAY_SIZE(vision_spi_board_info));
291 	vision_register_i2s();
292 }
293 
294 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
295 	/* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
296 	.atag_offset	= 0x100,
297 	.map_io		= vision_map_io,
298 	.init_irq	= ep93xx_init_irq,
299 	.init_time	= ep93xx_timer_init,
300 	.init_machine	= vision_init_machine,
301 	.init_late	= ep93xx_init_late,
302 	.restart	= ep93xx_restart,
303 MACHINE_END
304