1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * arch/arm/mach-ep93xx/vision_ep9307.c
4 * Vision Engraving Systems EP9307 SoM support.
5 *
6 * Copyright (C) 2008-2011 Vision Engraving Systems
7 * H Hartley Sweeten <hsweeten@visionengravers.com>
8 */
9
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/platform_device.h>
15 #include <linux/irq.h>
16 #include <linux/gpio.h>
17 #include <linux/gpio/machine.h>
18 #include <linux/fb.h>
19 #include <linux/io.h>
20 #include <linux/mtd/partitions.h>
21 #include <linux/i2c.h>
22 #include <linux/platform_data/pca953x.h>
23 #include <linux/spi/spi.h>
24 #include <linux/spi/flash.h>
25 #include <linux/spi/mmc_spi.h>
26 #include <linux/mmc/host.h>
27
28 #include <sound/cs4271.h>
29
30 #include "hardware.h"
31 #include <linux/platform_data/video-ep93xx.h>
32 #include <linux/platform_data/spi-ep93xx.h>
33 #include "gpio-ep93xx.h"
34
35 #include <asm/mach-types.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/arch.h>
38
39 #include "soc.h"
40
41 /*************************************************************************
42 * Static I/O mappings for the FPGA
43 *************************************************************************/
44 #define VISION_PHYS_BASE EP93XX_CS7_PHYS_BASE
45 #define VISION_VIRT_BASE 0xfebff000
46
47 static struct map_desc vision_io_desc[] __initdata = {
48 {
49 .virtual = VISION_VIRT_BASE,
50 .pfn = __phys_to_pfn(VISION_PHYS_BASE),
51 .length = SZ_4K,
52 .type = MT_DEVICE,
53 },
54 };
55
vision_map_io(void)56 static void __init vision_map_io(void)
57 {
58 ep93xx_map_io();
59
60 iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
61 }
62
63 /*************************************************************************
64 * Ethernet
65 *************************************************************************/
66 static struct ep93xx_eth_data vision_eth_data __initdata = {
67 .phy_id = 1,
68 };
69
70 /*************************************************************************
71 * Framebuffer
72 *************************************************************************/
73 #define VISION_LCD_ENABLE EP93XX_GPIO_LINE_EGPIO1
74
vision_lcd_setup(struct platform_device * pdev)75 static int vision_lcd_setup(struct platform_device *pdev)
76 {
77 int err;
78
79 err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
80 dev_name(&pdev->dev));
81 if (err)
82 return err;
83
84 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
85 EP93XX_SYSCON_DEVCFG_RASONP3 |
86 EP93XX_SYSCON_DEVCFG_EXVC);
87
88 return 0;
89 }
90
vision_lcd_teardown(struct platform_device * pdev)91 static void vision_lcd_teardown(struct platform_device *pdev)
92 {
93 gpio_free(VISION_LCD_ENABLE);
94 }
95
vision_lcd_blank(int blank_mode,struct fb_info * info)96 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
97 {
98 if (blank_mode)
99 gpio_set_value(VISION_LCD_ENABLE, 0);
100 else
101 gpio_set_value(VISION_LCD_ENABLE, 1);
102 }
103
104 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
105 .flags = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
106 .setup = vision_lcd_setup,
107 .teardown = vision_lcd_teardown,
108 .blank = vision_lcd_blank,
109 };
110
111
112 /*************************************************************************
113 * GPIO Expanders
114 *************************************************************************/
115 #define PCA9539_74_GPIO_BASE (EP93XX_GPIO_LINE_MAX + 1)
116 #define PCA9539_75_GPIO_BASE (PCA9539_74_GPIO_BASE + 16)
117 #define PCA9539_76_GPIO_BASE (PCA9539_75_GPIO_BASE + 16)
118 #define PCA9539_77_GPIO_BASE (PCA9539_76_GPIO_BASE + 16)
119
120 static struct pca953x_platform_data pca953x_74_gpio_data = {
121 .gpio_base = PCA9539_74_GPIO_BASE,
122 .irq_base = EP93XX_BOARD_IRQ(0),
123 };
124
125 static struct pca953x_platform_data pca953x_75_gpio_data = {
126 .gpio_base = PCA9539_75_GPIO_BASE,
127 .irq_base = -1,
128 };
129
130 static struct pca953x_platform_data pca953x_76_gpio_data = {
131 .gpio_base = PCA9539_76_GPIO_BASE,
132 .irq_base = -1,
133 };
134
135 static struct pca953x_platform_data pca953x_77_gpio_data = {
136 .gpio_base = PCA9539_77_GPIO_BASE,
137 .irq_base = -1,
138 };
139
140 /*************************************************************************
141 * I2C Bus
142 *************************************************************************/
143
144 static struct i2c_board_info vision_i2c_info[] __initdata = {
145 {
146 I2C_BOARD_INFO("isl1208", 0x6f),
147 .irq = IRQ_EP93XX_EXT1,
148 }, {
149 I2C_BOARD_INFO("pca9539", 0x74),
150 .platform_data = &pca953x_74_gpio_data,
151 }, {
152 I2C_BOARD_INFO("pca9539", 0x75),
153 .platform_data = &pca953x_75_gpio_data,
154 }, {
155 I2C_BOARD_INFO("pca9539", 0x76),
156 .platform_data = &pca953x_76_gpio_data,
157 }, {
158 I2C_BOARD_INFO("pca9539", 0x77),
159 .platform_data = &pca953x_77_gpio_data,
160 },
161 };
162
163 /*************************************************************************
164 * SPI CS4271 Audio Codec
165 *************************************************************************/
166 static struct cs4271_platform_data vision_cs4271_data = {
167 .gpio_nreset = EP93XX_GPIO_LINE_H(2),
168 };
169
170 /*************************************************************************
171 * SPI Flash
172 *************************************************************************/
173 static struct mtd_partition vision_spi_flash_partitions[] = {
174 {
175 .name = "SPI bootstrap",
176 .offset = 0,
177 .size = SZ_4K,
178 }, {
179 .name = "Bootstrap config",
180 .offset = MTDPART_OFS_APPEND,
181 .size = SZ_4K,
182 }, {
183 .name = "System config",
184 .offset = MTDPART_OFS_APPEND,
185 .size = MTDPART_SIZ_FULL,
186 },
187 };
188
189 static struct flash_platform_data vision_spi_flash_data = {
190 .name = "SPI Flash",
191 .parts = vision_spi_flash_partitions,
192 .nr_parts = ARRAY_SIZE(vision_spi_flash_partitions),
193 };
194
195 /*************************************************************************
196 * SPI SD/MMC host
197 *************************************************************************/
198 static struct mmc_spi_platform_data vision_spi_mmc_data = {
199 .detect_delay = 100,
200 .powerup_msecs = 100,
201 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
202 .caps2 = MMC_CAP2_RO_ACTIVE_HIGH,
203 };
204
205 static struct gpiod_lookup_table vision_spi_mmc_gpio_table = {
206 .dev_id = "mmc_spi.2", /* "mmc_spi @ CS2 */
207 .table = {
208 /* Card detect */
209 GPIO_LOOKUP_IDX("B", 7, NULL, 0, GPIO_ACTIVE_LOW),
210 /* Write protect */
211 GPIO_LOOKUP_IDX("F", 0, NULL, 1, GPIO_ACTIVE_HIGH),
212 { },
213 },
214 };
215
216 /*************************************************************************
217 * SPI Bus
218 *************************************************************************/
219 static struct spi_board_info vision_spi_board_info[] __initdata = {
220 {
221 .modalias = "cs4271",
222 .platform_data = &vision_cs4271_data,
223 .max_speed_hz = 6000000,
224 .bus_num = 0,
225 .chip_select = 0,
226 .mode = SPI_MODE_3,
227 }, {
228 .modalias = "sst25l",
229 .platform_data = &vision_spi_flash_data,
230 .max_speed_hz = 20000000,
231 .bus_num = 0,
232 .chip_select = 1,
233 .mode = SPI_MODE_3,
234 }, {
235 .modalias = "mmc_spi",
236 .platform_data = &vision_spi_mmc_data,
237 .max_speed_hz = 20000000,
238 .bus_num = 0,
239 .chip_select = 2,
240 .mode = SPI_MODE_3,
241 },
242 };
243
244 static struct gpiod_lookup_table vision_spi_cs_gpio_table = {
245 .dev_id = "spi0",
246 .table = {
247 GPIO_LOOKUP_IDX("A", 6, "cs", 0, GPIO_ACTIVE_LOW),
248 GPIO_LOOKUP_IDX("A", 7, "cs", 1, GPIO_ACTIVE_LOW),
249 GPIO_LOOKUP_IDX("G", 2, "cs", 2, GPIO_ACTIVE_LOW),
250 { },
251 },
252 };
253
254 static struct ep93xx_spi_info vision_spi_master __initdata = {
255 .use_dma = 1,
256 };
257
258 /*************************************************************************
259 * I2S Audio
260 *************************************************************************/
261 static struct platform_device vision_audio_device = {
262 .name = "edb93xx-audio",
263 .id = -1,
264 };
265
vision_register_i2s(void)266 static void __init vision_register_i2s(void)
267 {
268 ep93xx_register_i2s();
269 platform_device_register(&vision_audio_device);
270 }
271
272 /*************************************************************************
273 * Machine Initialization
274 *************************************************************************/
vision_init_machine(void)275 static void __init vision_init_machine(void)
276 {
277 ep93xx_init_devices();
278 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
279 ep93xx_register_eth(&vision_eth_data, 1);
280 ep93xx_register_fb(&ep93xxfb_info);
281 ep93xx_register_pwm(1, 0);
282
283 /*
284 * Request the gpio expander's interrupt gpio line now to prevent
285 * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
286 */
287 if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
288 "pca9539:74"))
289 pr_warn("cannot request interrupt gpio for pca9539:74\n");
290
291 vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
292
293 ep93xx_register_i2c(vision_i2c_info,
294 ARRAY_SIZE(vision_i2c_info));
295 gpiod_add_lookup_table(&vision_spi_mmc_gpio_table);
296 gpiod_add_lookup_table(&vision_spi_cs_gpio_table);
297 ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
298 ARRAY_SIZE(vision_spi_board_info));
299 vision_register_i2s();
300 }
301
302 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
303 /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
304 .atag_offset = 0x100,
305 .nr_irqs = NR_EP93XX_IRQS + EP93XX_BOARD_IRQS,
306 .map_io = vision_map_io,
307 .init_irq = ep93xx_init_irq,
308 .init_time = ep93xx_timer_init,
309 .init_machine = vision_init_machine,
310 .restart = ep93xx_restart,
311 MACHINE_END
312