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 
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 
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 
91 static void vision_lcd_teardown(struct platform_device *pdev)
92 {
93 	gpio_free(VISION_LCD_ENABLE);
94 }
95 
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 = "ep93xx-spi.0",
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 
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  *************************************************************************/
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 	.map_io		= vision_map_io,
306 	.init_irq	= ep93xx_init_irq,
307 	.init_time	= ep93xx_timer_init,
308 	.init_machine	= vision_init_machine,
309 	.init_late	= ep93xx_init_late,
310 	.restart	= ep93xx_restart,
311 MACHINE_END
312