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 /*************************************************************************
43 * Static I/O mappings for the FPGA
44 *************************************************************************/
45 #define VISION_PHYS_BASE EP93XX_CS7_PHYS_BASE
46 #define VISION_VIRT_BASE 0xfebff000
47
48 static struct map_desc vision_io_desc[] __initdata = {
49 {
50 .virtual = VISION_VIRT_BASE,
51 .pfn = __phys_to_pfn(VISION_PHYS_BASE),
52 .length = SZ_4K,
53 .type = MT_DEVICE,
54 },
55 };
56
vision_map_io(void)57 static void __init vision_map_io(void)
58 {
59 ep93xx_map_io();
60
61 iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
62 }
63
64 /*************************************************************************
65 * Ethernet
66 *************************************************************************/
67 static struct ep93xx_eth_data vision_eth_data __initdata = {
68 .phy_id = 1,
69 };
70
71 /*************************************************************************
72 * Framebuffer
73 *************************************************************************/
74 #define VISION_LCD_ENABLE EP93XX_GPIO_LINE_EGPIO1
75
vision_lcd_setup(struct platform_device * pdev)76 static int vision_lcd_setup(struct platform_device *pdev)
77 {
78 int err;
79
80 err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
81 dev_name(&pdev->dev));
82 if (err)
83 return err;
84
85 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
86 EP93XX_SYSCON_DEVCFG_RASONP3 |
87 EP93XX_SYSCON_DEVCFG_EXVC);
88
89 return 0;
90 }
91
vision_lcd_teardown(struct platform_device * pdev)92 static void vision_lcd_teardown(struct platform_device *pdev)
93 {
94 gpio_free(VISION_LCD_ENABLE);
95 }
96
vision_lcd_blank(int blank_mode,struct fb_info * info)97 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
98 {
99 if (blank_mode)
100 gpio_set_value(VISION_LCD_ENABLE, 0);
101 else
102 gpio_set_value(VISION_LCD_ENABLE, 1);
103 }
104
105 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
106 .num_modes = EP93XXFB_USE_MODEDB,
107 .bpp = 16,
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 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
147 .sda_pin = EP93XX_GPIO_LINE_EEDAT,
148 .scl_pin = EP93XX_GPIO_LINE_EECLK,
149 };
150
151 static struct i2c_board_info vision_i2c_info[] __initdata = {
152 {
153 I2C_BOARD_INFO("isl1208", 0x6f),
154 .irq = IRQ_EP93XX_EXT1,
155 }, {
156 I2C_BOARD_INFO("pca9539", 0x74),
157 .platform_data = &pca953x_74_gpio_data,
158 }, {
159 I2C_BOARD_INFO("pca9539", 0x75),
160 .platform_data = &pca953x_75_gpio_data,
161 }, {
162 I2C_BOARD_INFO("pca9539", 0x76),
163 .platform_data = &pca953x_76_gpio_data,
164 }, {
165 I2C_BOARD_INFO("pca9539", 0x77),
166 .platform_data = &pca953x_77_gpio_data,
167 },
168 };
169
170 /*************************************************************************
171 * SPI Flash
172 *************************************************************************/
173 #define VISION_SPI_FLASH_CS EP93XX_GPIO_LINE_EGPIO7
174
175 static struct mtd_partition vision_spi_flash_partitions[] = {
176 {
177 .name = "SPI bootstrap",
178 .offset = 0,
179 .size = SZ_4K,
180 }, {
181 .name = "Bootstrap config",
182 .offset = MTDPART_OFS_APPEND,
183 .size = SZ_4K,
184 }, {
185 .name = "System config",
186 .offset = MTDPART_OFS_APPEND,
187 .size = MTDPART_SIZ_FULL,
188 },
189 };
190
191 static struct flash_platform_data vision_spi_flash_data = {
192 .name = "SPI Flash",
193 .parts = vision_spi_flash_partitions,
194 .nr_parts = ARRAY_SIZE(vision_spi_flash_partitions),
195 };
196
vision_spi_flash_hw_setup(struct spi_device * spi)197 static int vision_spi_flash_hw_setup(struct spi_device *spi)
198 {
199 return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
200 spi->modalias);
201 }
202
vision_spi_flash_hw_cleanup(struct spi_device * spi)203 static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
204 {
205 gpio_free(VISION_SPI_FLASH_CS);
206 }
207
vision_spi_flash_hw_cs_control(struct spi_device * spi,int value)208 static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
209 {
210 gpio_set_value(VISION_SPI_FLASH_CS, value);
211 }
212
213 static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
214 .setup = vision_spi_flash_hw_setup,
215 .cleanup = vision_spi_flash_hw_cleanup,
216 .cs_control = vision_spi_flash_hw_cs_control,
217 };
218
219 /*************************************************************************
220 * SPI SD/MMC host
221 *************************************************************************/
222 #define VISION_SPI_MMC_CS EP93XX_GPIO_LINE_G(2)
223 #define VISION_SPI_MMC_WP EP93XX_GPIO_LINE_F(0)
224 #define VISION_SPI_MMC_CD EP93XX_GPIO_LINE_EGPIO15
225
226 static struct gpio vision_spi_mmc_gpios[] = {
227 { VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
228 { VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
229 };
230
vision_spi_mmc_init(struct device * pdev,irqreturn_t (* func)(int,void *),void * pdata)231 static int vision_spi_mmc_init(struct device *pdev,
232 irqreturn_t (*func)(int, void *), void *pdata)
233 {
234 int err;
235
236 err = gpio_request_array(vision_spi_mmc_gpios,
237 ARRAY_SIZE(vision_spi_mmc_gpios));
238 if (err)
239 return err;
240
241 err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
242 if (err)
243 goto exit_err;
244
245 err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
246 IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
247 if (err)
248 goto exit_err;
249
250 return 0;
251
252 exit_err:
253 gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
254 return err;
255
256 }
257
vision_spi_mmc_exit(struct device * pdev,void * pdata)258 static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
259 {
260 free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
261 gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
262 }
263
vision_spi_mmc_get_ro(struct device * pdev)264 static int vision_spi_mmc_get_ro(struct device *pdev)
265 {
266 return !!gpio_get_value(VISION_SPI_MMC_WP);
267 }
268
vision_spi_mmc_get_cd(struct device * pdev)269 static int vision_spi_mmc_get_cd(struct device *pdev)
270 {
271 return !gpio_get_value(VISION_SPI_MMC_CD);
272 }
273
274 static struct mmc_spi_platform_data vision_spi_mmc_data = {
275 .init = vision_spi_mmc_init,
276 .exit = vision_spi_mmc_exit,
277 .get_ro = vision_spi_mmc_get_ro,
278 .get_cd = vision_spi_mmc_get_cd,
279 .detect_delay = 100,
280 .powerup_msecs = 100,
281 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
282 };
283
vision_spi_mmc_hw_setup(struct spi_device * spi)284 static int vision_spi_mmc_hw_setup(struct spi_device *spi)
285 {
286 return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
287 spi->modalias);
288 }
289
vision_spi_mmc_hw_cleanup(struct spi_device * spi)290 static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
291 {
292 gpio_free(VISION_SPI_MMC_CS);
293 }
294
vision_spi_mmc_hw_cs_control(struct spi_device * spi,int value)295 static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
296 {
297 gpio_set_value(VISION_SPI_MMC_CS, value);
298 }
299
300 static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
301 .setup = vision_spi_mmc_hw_setup,
302 .cleanup = vision_spi_mmc_hw_cleanup,
303 .cs_control = vision_spi_mmc_hw_cs_control,
304 };
305
306 /*************************************************************************
307 * SPI Bus
308 *************************************************************************/
309 static struct spi_board_info vision_spi_board_info[] __initdata = {
310 {
311 .modalias = "sst25l",
312 .platform_data = &vision_spi_flash_data,
313 .controller_data = &vision_spi_flash_hw,
314 .max_speed_hz = 20000000,
315 .bus_num = 0,
316 .chip_select = 0,
317 .mode = SPI_MODE_3,
318 }, {
319 .modalias = "mmc_spi",
320 .platform_data = &vision_spi_mmc_data,
321 .controller_data = &vision_spi_mmc_hw,
322 .max_speed_hz = 20000000,
323 .bus_num = 0,
324 .chip_select = 1,
325 .mode = SPI_MODE_3,
326 },
327 };
328
329 static struct ep93xx_spi_info vision_spi_master __initdata = {
330 .num_chipselect = ARRAY_SIZE(vision_spi_board_info),
331 };
332
333 /*************************************************************************
334 * Machine Initialization
335 *************************************************************************/
vision_init_machine(void)336 static void __init vision_init_machine(void)
337 {
338 ep93xx_init_devices();
339 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
340 ep93xx_register_eth(&vision_eth_data, 1);
341 ep93xx_register_fb(&ep93xxfb_info);
342 ep93xx_register_pwm(1, 0);
343
344 /*
345 * Request the gpio expander's interrupt gpio line now to prevent
346 * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
347 */
348 if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
349 "pca9539:74"))
350 pr_warn("cannot request interrupt gpio for pca9539:74\n");
351
352 vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
353
354 ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
355 ARRAY_SIZE(vision_i2c_info));
356 ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
357 ARRAY_SIZE(vision_spi_board_info));
358 }
359
360 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
361 /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
362 .atag_offset = 0x100,
363 .map_io = vision_map_io,
364 .init_irq = ep93xx_init_irq,
365 .handle_irq = vic_handle_irq,
366 .timer = &ep93xx_timer,
367 .init_machine = vision_init_machine,
368 .restart = ep93xx_restart,
369 MACHINE_END
370