xref: /openbmc/linux/arch/mips/alchemy/board-mtx1.c (revision 026ba130)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * MTX-1 platform devices registration (Au1500)
4  *
5  * Copyright (C) 2007-2009, Florian Fainelli <florian@openwrt.org>
6  */
7 
8 #include <linux/init.h>
9 #include <linux/interrupt.h>
10 #include <linux/kernel.h>
11 #include <linux/platform_device.h>
12 #include <linux/leds.h>
13 #include <linux/gpio.h>
14 #include <linux/gpio/machine.h>
15 #include <linux/gpio_keys.h>
16 #include <linux/input.h>
17 #include <linux/mtd/partitions.h>
18 #include <linux/mtd/physmap.h>
19 #include <mtd/mtd-abi.h>
20 #include <asm/bootinfo.h>
21 #include <asm/reboot.h>
22 #include <asm/setup.h>
23 #include <asm/mach-au1x00/au1000.h>
24 #include <asm/mach-au1x00/gpio-au1000.h>
25 #include <asm/mach-au1x00/au1xxx_eth.h>
26 #include <prom.h>
27 
get_system_type(void)28 const char *get_system_type(void)
29 {
30 	return "MTX-1";
31 }
32 
prom_putchar(char c)33 void prom_putchar(char c)
34 {
35 	alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
36 }
37 
mtx1_reset(char * c)38 static void mtx1_reset(char *c)
39 {
40 	/* Jump to the reset vector */
41 	__asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
42 }
43 
mtx1_power_off(void)44 static void mtx1_power_off(void)
45 {
46 	while (1)
47 		asm volatile (
48 		"	.set	mips32					\n"
49 		"	wait						\n"
50 		"	.set	mips0					\n");
51 }
52 
board_setup(void)53 void __init board_setup(void)
54 {
55 #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
56 	/* Enable USB power switch */
57 	alchemy_gpio_direction_output(204, 0);
58 #endif /* IS_ENABLED(CONFIG_USB_OHCI_HCD) */
59 
60 	/* Initialize sys_pinfunc */
61 	alchemy_wrsys(SYS_PF_NI2, AU1000_SYS_PINFUNC);
62 
63 	/* Initialize GPIO */
64 	alchemy_wrsys(~0, AU1000_SYS_TRIOUTCLR);
65 	alchemy_gpio_direction_output(0, 0);	/* Disable M66EN (PCI 66MHz) */
66 	alchemy_gpio_direction_output(3, 1);	/* Disable PCI CLKRUN# */
67 	alchemy_gpio_direction_output(1, 1);	/* Enable EXT_IO3 */
68 	alchemy_gpio_direction_output(5, 0);	/* Disable eth PHY TX_ER */
69 
70 	/* Enable LED and set it to green */
71 	alchemy_gpio_direction_output(211, 1);	/* green on */
72 	alchemy_gpio_direction_output(212, 0);	/* red off */
73 
74 	pm_power_off = mtx1_power_off;
75 	_machine_halt = mtx1_power_off;
76 	_machine_restart = mtx1_reset;
77 
78 	printk(KERN_INFO "4G Systems MTX-1 Board\n");
79 }
80 
81 /******************************************************************************/
82 
83 static struct gpio_keys_button mtx1_gpio_button[] = {
84 	{
85 		.gpio = 207,
86 		.code = BTN_0,
87 		.desc = "System button",
88 	}
89 };
90 
91 static struct gpio_keys_platform_data mtx1_buttons_data = {
92 	.buttons = mtx1_gpio_button,
93 	.nbuttons = ARRAY_SIZE(mtx1_gpio_button),
94 };
95 
96 static struct platform_device mtx1_button = {
97 	.name = "gpio-keys",
98 	.id = -1,
99 	.dev = {
100 		.platform_data = &mtx1_buttons_data,
101 	}
102 };
103 
104 static struct gpiod_lookup_table mtx1_wdt_gpio_table = {
105 	.dev_id = "mtx1-wdt.0",
106 	.table = {
107 		/* Global number 215 is offset 15 on Alchemy GPIO 2 */
108 		GPIO_LOOKUP("alchemy-gpio2", 15, NULL, GPIO_ACTIVE_HIGH),
109 		{ },
110 	},
111 };
112 
113 static struct platform_device mtx1_wdt = {
114 	.name = "mtx1-wdt",
115 	.id = 0,
116 };
117 
118 static const struct gpio_led default_leds[] = {
119 	{
120 		.name	= "mtx1:green",
121 		.gpio = 211,
122 	}, {
123 		.name = "mtx1:red",
124 		.gpio = 212,
125 	},
126 };
127 
128 static struct gpio_led_platform_data mtx1_led_data = {
129 	.num_leds = ARRAY_SIZE(default_leds),
130 	.leds = default_leds,
131 };
132 
133 static struct platform_device mtx1_gpio_leds = {
134 	.name = "leds-gpio",
135 	.id = -1,
136 	.dev = {
137 		.platform_data = &mtx1_led_data,
138 	}
139 };
140 
141 static struct mtd_partition mtx1_mtd_partitions[] = {
142 	{
143 		.name	= "filesystem",
144 		.size	= 0x01C00000,
145 		.offset = 0,
146 	},
147 	{
148 		.name	= "yamon",
149 		.size	= 0x00100000,
150 		.offset = MTDPART_OFS_APPEND,
151 		.mask_flags = MTD_WRITEABLE,
152 	},
153 	{
154 		.name	= "kernel",
155 		.size	= 0x002c0000,
156 		.offset = MTDPART_OFS_APPEND,
157 	},
158 	{
159 		.name	= "yamon env",
160 		.size	= 0x00040000,
161 		.offset = MTDPART_OFS_APPEND,
162 	},
163 };
164 
165 static struct physmap_flash_data mtx1_flash_data = {
166 	.width		= 4,
167 	.nr_parts	= 4,
168 	.parts		= mtx1_mtd_partitions,
169 };
170 
171 static struct resource mtx1_mtd_resource = {
172 	.start	= 0x1e000000,
173 	.end	= 0x1fffffff,
174 	.flags	= IORESOURCE_MEM,
175 };
176 
177 static struct platform_device mtx1_mtd = {
178 	.name		= "physmap-flash",
179 	.dev		= {
180 		.platform_data	= &mtx1_flash_data,
181 	},
182 	.num_resources	= 1,
183 	.resource	= &mtx1_mtd_resource,
184 };
185 
186 static struct resource alchemy_pci_host_res[] = {
187 	[0] = {
188 		.start	= AU1500_PCI_PHYS_ADDR,
189 		.end	= AU1500_PCI_PHYS_ADDR + 0xfff,
190 		.flags	= IORESOURCE_MEM,
191 	},
192 };
193 
mtx1_pci_idsel(unsigned int devsel,int assert)194 static int mtx1_pci_idsel(unsigned int devsel, int assert)
195 {
196 	/* This function is only necessary to support a proprietary Cardbus
197 	 * adapter on the mtx-1 "singleboard" variant. It triggers a custom
198 	 * logic chip connected to EXT_IO3 (GPIO1) to suppress IDSEL signals.
199 	 */
200 	udelay(1);
201 
202 	if (assert && devsel != 0)
203 		/* Suppress signal to Cardbus */
204 		alchemy_gpio_set_value(1, 0);	/* set EXT_IO3 OFF */
205 	else
206 		alchemy_gpio_set_value(1, 1);	/* set EXT_IO3 ON */
207 
208 	udelay(1);
209 	return 1;
210 }
211 
212 static const char mtx1_irqtab[][5] = {
213 	[0] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 00 - AdapterA-Slot0 (top) */
214 	[1] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 01 - AdapterA-Slot1 (bottom) */
215 	[2] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 02 - AdapterB-Slot0 (top) */
216 	[3] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 03 - AdapterB-Slot1 (bottom) */
217 	[4] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTB, 0xff, 0xff }, /* IDSEL 04 - AdapterC-Slot0 (top) */
218 	[5] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 05 - AdapterC-Slot1 (bottom) */
219 	[6] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 06 - AdapterD-Slot0 (top) */
220 	[7] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 07 - AdapterD-Slot1 (bottom) */
221 };
222 
mtx1_map_pci_irq(const struct pci_dev * d,u8 slot,u8 pin)223 static int mtx1_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
224 {
225 	return mtx1_irqtab[slot][pin];
226 }
227 
228 static struct alchemy_pci_platdata mtx1_pci_pd = {
229 	.board_map_irq	 = mtx1_map_pci_irq,
230 	.board_pci_idsel = mtx1_pci_idsel,
231 	.pci_cfg_set	 = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
232 			   PCI_CONFIG_CH |
233 #if defined(__MIPSEB__)
234 			   PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
235 #else
236 			   0,
237 #endif
238 };
239 
240 static struct platform_device mtx1_pci_host = {
241 	.dev.platform_data = &mtx1_pci_pd,
242 	.name		= "alchemy-pci",
243 	.id		= 0,
244 	.num_resources	= ARRAY_SIZE(alchemy_pci_host_res),
245 	.resource	= alchemy_pci_host_res,
246 };
247 
248 static struct platform_device *mtx1_devs[] __initdata = {
249 	&mtx1_pci_host,
250 	&mtx1_gpio_leds,
251 	&mtx1_wdt,
252 	&mtx1_button,
253 	&mtx1_mtd,
254 };
255 
256 static struct au1000_eth_platform_data mtx1_au1000_eth0_pdata = {
257 	.phy_search_highest_addr	= 1,
258 	.phy1_search_mac0		= 1,
259 };
260 
mtx1_register_devices(void)261 static int __init mtx1_register_devices(void)
262 {
263 	int rc;
264 
265 	irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
266 	irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
267 	irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
268 	irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
269 	irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
270 
271 	au1xxx_override_eth_cfg(0, &mtx1_au1000_eth0_pdata);
272 
273 	rc = gpio_request(mtx1_gpio_button[0].gpio,
274 					mtx1_gpio_button[0].desc);
275 	if (rc < 0) {
276 		printk(KERN_INFO "mtx1: failed to request %d\n",
277 					mtx1_gpio_button[0].gpio);
278 		goto out;
279 	}
280 	gpio_direction_input(mtx1_gpio_button[0].gpio);
281 out:
282 	gpiod_add_lookup_table(&mtx1_wdt_gpio_table);
283 	return platform_add_devices(mtx1_devs, ARRAY_SIZE(mtx1_devs));
284 }
285 arch_initcall(mtx1_register_devices);
286