xref: /openbmc/linux/arch/mips/alchemy/board-gpr.c (revision 13dd8710) 
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * GPR board platform device registration (Au1550)
4  *
5  * Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
6  */
7 
8 #include <linux/delay.h>
9 #include <linux/init.h>
10 #include <linux/interrupt.h>
11 #include <linux/kernel.h>
12 #include <linux/platform_device.h>
13 #include <linux/pm.h>
14 #include <linux/mtd/partitions.h>
15 #include <linux/mtd/physmap.h>
16 #include <linux/leds.h>
17 #include <linux/gpio.h>
18 #include <linux/i2c.h>
19 #include <linux/platform_data/i2c-gpio.h>
20 #include <linux/gpio/machine.h>
21 #include <asm/bootinfo.h>
22 #include <asm/idle.h>
23 #include <asm/reboot.h>
24 #include <asm/setup.h>
25 #include <asm/mach-au1x00/au1000.h>
26 #include <asm/mach-au1x00/gpio-au1000.h>
27 #include <prom.h>
28 
29 const char *get_system_type(void)
30 {
31 	return "GPR";
32 }
33 
34 void prom_putchar(char c)
35 {
36 	alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
37 }
38 
39 static void gpr_reset(char *c)
40 {
41 	/* switch System-LED to orange (red# and green# on) */
42 	alchemy_gpio_direction_output(4, 0);
43 	alchemy_gpio_direction_output(5, 0);
44 
45 	/* trigger watchdog to reset board in 200ms */
46 	printk(KERN_EMERG "Triggering watchdog soft reset...\n");
47 	raw_local_irq_disable();
48 	alchemy_gpio_direction_output(1, 0);
49 	udelay(1);
50 	alchemy_gpio_set_value(1, 1);
51 	while (1)
52 		cpu_wait();
53 }
54 
55 static void gpr_power_off(void)
56 {
57 	while (1)
58 		cpu_wait();
59 }
60 
61 void __init board_setup(void)
62 {
63 	printk(KERN_INFO "Trapeze ITS GPR board\n");
64 
65 	pm_power_off = gpr_power_off;
66 	_machine_halt = gpr_power_off;
67 	_machine_restart = gpr_reset;
68 
69 	/* Enable UART1/3 */
70 	alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
71 	alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
72 
73 	/* Take away Reset of UMTS-card */
74 	alchemy_gpio_direction_output(215, 1);
75 }
76 
77 /*
78  * Watchdog
79  */
80 static struct resource gpr_wdt_resource[] = {
81 	[0] = {
82 		.start	= 1,
83 		.end	= 1,
84 		.name	= "gpr-adm6320-wdt",
85 		.flags	= IORESOURCE_IRQ,
86 	}
87 };
88 
89 static struct platform_device gpr_wdt_device = {
90 	.name = "adm6320-wdt",
91 	.id = 0,
92 	.num_resources = ARRAY_SIZE(gpr_wdt_resource),
93 	.resource = gpr_wdt_resource,
94 };
95 
96 /*
97  * FLASH
98  *
99  * 0x00000000-0x00200000 : "kernel"
100  * 0x00200000-0x00a00000 : "rootfs"
101  * 0x01d00000-0x01f00000 : "config"
102  * 0x01c00000-0x01d00000 : "yamon"
103  * 0x01d00000-0x01d40000 : "yamon env vars"
104  * 0x00000000-0x00a00000 : "kernel+rootfs"
105  */
106 static struct mtd_partition gpr_mtd_partitions[] = {
107 	{
108 		.name	= "kernel",
109 		.size	= 0x00200000,
110 		.offset = 0,
111 	},
112 	{
113 		.name	= "rootfs",
114 		.size	= 0x00800000,
115 		.offset = MTDPART_OFS_APPEND,
116 		.mask_flags = MTD_WRITEABLE,
117 	},
118 	{
119 		.name	= "config",
120 		.size	= 0x00200000,
121 		.offset = 0x01d00000,
122 	},
123 	{
124 		.name	= "yamon",
125 		.size	= 0x00100000,
126 		.offset = 0x01c00000,
127 	},
128 	{
129 		.name	= "yamon env vars",
130 		.size	= 0x00040000,
131 		.offset = MTDPART_OFS_APPEND,
132 	},
133 	{
134 		.name	= "kernel+rootfs",
135 		.size	= 0x00a00000,
136 		.offset = 0,
137 	},
138 };
139 
140 static struct physmap_flash_data gpr_flash_data = {
141 	.width		= 4,
142 	.nr_parts	= ARRAY_SIZE(gpr_mtd_partitions),
143 	.parts		= gpr_mtd_partitions,
144 };
145 
146 static struct resource gpr_mtd_resource = {
147 	.start	= 0x1e000000,
148 	.end	= 0x1fffffff,
149 	.flags	= IORESOURCE_MEM,
150 };
151 
152 static struct platform_device gpr_mtd_device = {
153 	.name		= "physmap-flash",
154 	.dev		= {
155 		.platform_data	= &gpr_flash_data,
156 	},
157 	.num_resources	= 1,
158 	.resource	= &gpr_mtd_resource,
159 };
160 
161 /*
162  * LEDs
163  */
164 static const struct gpio_led gpr_gpio_leds[] = {
165 	{	/* green */
166 		.name			= "gpr:green",
167 		.gpio			= 4,
168 		.active_low		= 1,
169 	},
170 	{	/* red */
171 		.name			= "gpr:red",
172 		.gpio			= 5,
173 		.active_low		= 1,
174 	}
175 };
176 
177 static struct gpio_led_platform_data gpr_led_data = {
178 	.num_leds = ARRAY_SIZE(gpr_gpio_leds),
179 	.leds = gpr_gpio_leds,
180 };
181 
182 static struct platform_device gpr_led_devices = {
183 	.name = "leds-gpio",
184 	.id = -1,
185 	.dev = {
186 		.platform_data = &gpr_led_data,
187 	}
188 };
189 
190 /*
191  * I2C
192  */
193 static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
194 	.dev_id = "i2c-gpio",
195 	.table = {
196 		/*
197 		 * This should be on "GPIO2" which has base at 200 so
198 		 * the global numbers 209 and 210 should correspond to
199 		 * local offsets 9 and 10.
200 		 */
201 		GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
202 				GPIO_ACTIVE_HIGH),
203 		GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
204 				GPIO_ACTIVE_HIGH),
205 	},
206 };
207 
208 static struct i2c_gpio_platform_data gpr_i2c_data = {
209 	/*
210 	 * The open drain mode is hardwired somewhere or an electrical
211 	 * property of the alchemy GPIO controller.
212 	 */
213 	.sda_is_open_drain	= 1,
214 	.scl_is_open_drain	= 1,
215 	.udelay			= 2,		/* ~100 kHz */
216 	.timeout		= HZ,
217 };
218 
219 static struct platform_device gpr_i2c_device = {
220 	.name			= "i2c-gpio",
221 	.id			= -1,
222 	.dev.platform_data	= &gpr_i2c_data,
223 };
224 
225 static struct i2c_board_info gpr_i2c_info[] __initdata = {
226 	{
227 		I2C_BOARD_INFO("lm83", 0x18),
228 	}
229 };
230 
231 
232 
233 static struct resource alchemy_pci_host_res[] = {
234 	[0] = {
235 		.start	= AU1500_PCI_PHYS_ADDR,
236 		.end	= AU1500_PCI_PHYS_ADDR + 0xfff,
237 		.flags	= IORESOURCE_MEM,
238 	},
239 };
240 
241 static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
242 {
243 	if ((slot == 0) && (pin == 1))
244 		return AU1550_PCI_INTA;
245 	else if ((slot == 0) && (pin == 2))
246 		return AU1550_PCI_INTB;
247 
248 	return 0xff;
249 }
250 
251 static struct alchemy_pci_platdata gpr_pci_pd = {
252 	.board_map_irq	= gpr_map_pci_irq,
253 	.pci_cfg_set	= PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
254 			  PCI_CONFIG_CH |
255 #if defined(__MIPSEB__)
256 			  PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
257 #else
258 			  0,
259 #endif
260 };
261 
262 static struct platform_device gpr_pci_host_dev = {
263 	.dev.platform_data = &gpr_pci_pd,
264 	.name		= "alchemy-pci",
265 	.id		= 0,
266 	.num_resources	= ARRAY_SIZE(alchemy_pci_host_res),
267 	.resource	= alchemy_pci_host_res,
268 };
269 
270 static struct platform_device *gpr_devices[] __initdata = {
271 	&gpr_wdt_device,
272 	&gpr_mtd_device,
273 	&gpr_i2c_device,
274 	&gpr_led_devices,
275 };
276 
277 static int __init gpr_pci_init(void)
278 {
279 	return platform_device_register(&gpr_pci_host_dev);
280 }
281 /* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
282 arch_initcall(gpr_pci_init);
283 
284 
285 static int __init gpr_dev_init(void)
286 {
287 	gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
288 	i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
289 
290 	return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
291 }
292 device_initcall(gpr_dev_init);
293