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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7e36e2f5 RW |
2 | /* |
3 | * arch/arm/mach-ixp4xx/fsg-setup.c | |
4 | * | |
5 | * FSG board-setup | |
6 | * | |
7 | * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> | |
8 | * | |
9 | * based on ixdp425-setup.c: | |
10 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
11 | * based on nslu2-power.c | |
12 | * Copyright (C) 2005 Tower Technologies | |
13 | * | |
14 | * Author: Rod Whitby <rod@whitby.id.au> | |
15 | * Maintainers: http://www.nslu2-linux.org/ | |
16 | * | |
17 | */ | |
2f8163ba | 18 | #include <linux/gpio.h> |
7e36e2f5 RW |
19 | #include <linux/if_ether.h> |
20 | #include <linux/irq.h> | |
21 | #include <linux/serial.h> | |
22 | #include <linux/serial_8250.h> | |
23 | #include <linux/leds.h> | |
24 | #include <linux/reboot.h> | |
25 | #include <linux/i2c.h> | |
b2e63555 | 26 | #include <linux/gpio/machine.h> |
fced80c7 | 27 | #include <linux/io.h> |
7e36e2f5 RW |
28 | #include <asm/mach-types.h> |
29 | #include <asm/mach/arch.h> | |
30 | #include <asm/mach/flash.h> | |
7e36e2f5 | 31 | |
dc8ef8cd LW |
32 | #include "irqs.h" |
33 | ||
914e7bc2 KH |
34 | #define FSG_SDA_PIN 12 |
35 | #define FSG_SCL_PIN 13 | |
36 | ||
37 | #define FSG_SB_GPIO 4 /* sync button */ | |
38 | #define FSG_RB_GPIO 9 /* reset button */ | |
39 | #define FSG_UB_GPIO 10 /* usb button */ | |
40 | ||
7e36e2f5 RW |
41 | static struct flash_platform_data fsg_flash_data = { |
42 | .map_name = "cfi_probe", | |
43 | .width = 2, | |
44 | }; | |
45 | ||
46 | static struct resource fsg_flash_resource = { | |
47 | .flags = IORESOURCE_MEM, | |
48 | }; | |
49 | ||
50 | static struct platform_device fsg_flash = { | |
51 | .name = "IXP4XX-Flash", | |
52 | .id = 0, | |
53 | .dev = { | |
54 | .platform_data = &fsg_flash_data, | |
55 | }, | |
56 | .num_resources = 1, | |
57 | .resource = &fsg_flash_resource, | |
58 | }; | |
59 | ||
b2e63555 | 60 | static struct gpiod_lookup_table fsg_i2c_gpiod_table = { |
f59c303b | 61 | .dev_id = "i2c-gpio.0", |
b2e63555 LW |
62 | .table = { |
63 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SDA_PIN, | |
4d0ce62c | 64 | NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 65 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SCL_PIN, |
4d0ce62c | 66 | NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 67 | }, |
7e36e2f5 RW |
68 | }; |
69 | ||
70 | static struct platform_device fsg_i2c_gpio = { | |
71 | .name = "i2c-gpio", | |
72 | .id = 0, | |
73 | .dev = { | |
b2e63555 | 74 | .platform_data = NULL, |
7e36e2f5 RW |
75 | }, |
76 | }; | |
77 | ||
78 | static struct i2c_board_info __initdata fsg_i2c_board_info [] = { | |
79 | { | |
d90c1add | 80 | I2C_BOARD_INFO("isl1208", 0x6f), |
7e36e2f5 RW |
81 | }, |
82 | }; | |
83 | ||
84 | static struct resource fsg_uart_resources[] = { | |
85 | { | |
86 | .start = IXP4XX_UART1_BASE_PHYS, | |
87 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
88 | .flags = IORESOURCE_MEM, | |
89 | }, | |
90 | { | |
91 | .start = IXP4XX_UART2_BASE_PHYS, | |
92 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
93 | .flags = IORESOURCE_MEM, | |
94 | } | |
95 | }; | |
96 | ||
97 | static struct plat_serial8250_port fsg_uart_data[] = { | |
98 | { | |
99 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
100 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
101 | .irq = IRQ_IXP4XX_UART1, | |
102 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
103 | .iotype = UPIO_MEM, | |
104 | .regshift = 2, | |
105 | .uartclk = IXP4XX_UART_XTAL, | |
106 | }, | |
107 | { | |
108 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
109 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
110 | .irq = IRQ_IXP4XX_UART2, | |
111 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
112 | .iotype = UPIO_MEM, | |
113 | .regshift = 2, | |
114 | .uartclk = IXP4XX_UART_XTAL, | |
115 | }, | |
116 | { } | |
117 | }; | |
118 | ||
119 | static struct platform_device fsg_uart = { | |
120 | .name = "serial8250", | |
121 | .id = PLAT8250_DEV_PLATFORM, | |
122 | .dev = { | |
123 | .platform_data = fsg_uart_data, | |
124 | }, | |
125 | .num_resources = ARRAY_SIZE(fsg_uart_resources), | |
126 | .resource = fsg_uart_resources, | |
127 | }; | |
128 | ||
129 | static struct platform_device fsg_leds = { | |
130 | .name = "fsg-led", | |
131 | .id = -1, | |
132 | }; | |
133 | ||
134 | /* Built-in 10/100 Ethernet MAC interfaces */ | |
135 | static struct eth_plat_info fsg_plat_eth[] = { | |
136 | { | |
137 | .phy = 5, | |
138 | .rxq = 3, | |
139 | .txreadyq = 20, | |
140 | }, { | |
141 | .phy = 4, | |
142 | .rxq = 4, | |
143 | .txreadyq = 21, | |
144 | } | |
145 | }; | |
146 | ||
147 | static struct platform_device fsg_eth[] = { | |
148 | { | |
149 | .name = "ixp4xx_eth", | |
150 | .id = IXP4XX_ETH_NPEB, | |
151 | .dev = { | |
152 | .platform_data = fsg_plat_eth, | |
153 | }, | |
154 | }, { | |
155 | .name = "ixp4xx_eth", | |
156 | .id = IXP4XX_ETH_NPEC, | |
157 | .dev = { | |
158 | .platform_data = fsg_plat_eth + 1, | |
159 | }, | |
160 | } | |
161 | }; | |
162 | ||
163 | static struct platform_device *fsg_devices[] __initdata = { | |
164 | &fsg_i2c_gpio, | |
165 | &fsg_flash, | |
166 | &fsg_leds, | |
167 | &fsg_eth[0], | |
168 | &fsg_eth[1], | |
169 | }; | |
170 | ||
171 | static irqreturn_t fsg_power_handler(int irq, void *dev_id) | |
172 | { | |
173 | /* Signal init to do the ctrlaltdel action, this will bypass init if | |
174 | * it hasn't started and do a kernel_restart. | |
175 | */ | |
176 | ctrl_alt_del(); | |
177 | ||
178 | return IRQ_HANDLED; | |
179 | } | |
180 | ||
181 | static irqreturn_t fsg_reset_handler(int irq, void *dev_id) | |
182 | { | |
183 | /* This is the paper-clip reset which does an emergency reboot. */ | |
184 | printk(KERN_INFO "Restarting system.\n"); | |
185 | machine_restart(NULL); | |
186 | ||
187 | /* This should never be reached. */ | |
188 | return IRQ_HANDLED; | |
189 | } | |
190 | ||
191 | static void __init fsg_init(void) | |
192 | { | |
7e36e2f5 | 193 | uint8_t __iomem *f; |
7e36e2f5 RW |
194 | |
195 | ixp4xx_sys_init(); | |
196 | ||
197 | fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); | |
198 | fsg_flash_resource.end = | |
199 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
200 | ||
201 | *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE; | |
202 | *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0; | |
203 | ||
204 | /* Configure CS2 for operation, 8bit and writable */ | |
205 | *IXP4XX_EXP_CS2 = 0xbfff0002; | |
206 | ||
b2e63555 | 207 | gpiod_add_lookup_table(&fsg_i2c_gpiod_table); |
7e36e2f5 RW |
208 | i2c_register_board_info(0, fsg_i2c_board_info, |
209 | ARRAY_SIZE(fsg_i2c_board_info)); | |
210 | ||
211 | /* This is only useful on a modified machine, but it is valuable | |
212 | * to have it first in order to see debug messages, and so that | |
213 | * it does *not* get removed if platform_add_devices fails! | |
214 | */ | |
215 | (void)platform_device_register(&fsg_uart); | |
216 | ||
217 | platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices)); | |
218 | ||
219 | if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler, | |
1ee6564d | 220 | IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) { |
7e36e2f5 RW |
221 | |
222 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
223 | gpio_to_irq(FSG_RB_GPIO)); | |
224 | } | |
225 | ||
226 | if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler, | |
1ee6564d | 227 | IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) { |
7e36e2f5 RW |
228 | |
229 | printk(KERN_DEBUG "Power Button IRQ %d not available\n", | |
230 | gpio_to_irq(FSG_SB_GPIO)); | |
231 | } | |
232 | ||
233 | /* | |
234 | * Map in a portion of the flash and read the MAC addresses. | |
235 | * Since it is stored in BE in the flash itself, we need to | |
236 | * byteswap it if we're in LE mode. | |
237 | */ | |
238 | f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000); | |
239 | if (f) { | |
240 | #ifdef __ARMEB__ | |
d90c1add | 241 | int i; |
7e36e2f5 RW |
242 | for (i = 0; i < 6; i++) { |
243 | fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i); | |
244 | fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i); | |
245 | } | |
246 | #else | |
247 | ||
248 | /* | |
249 | Endian-swapped reads from unaligned addresses are | |
250 | required to extract the two MACs from the big-endian | |
251 | Redboot config area in flash. | |
252 | */ | |
253 | ||
254 | fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421); | |
255 | fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420); | |
256 | fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427); | |
257 | fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426); | |
258 | fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425); | |
259 | fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424); | |
260 | ||
261 | fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439); | |
262 | fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F); | |
263 | fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E); | |
264 | fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D); | |
265 | fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C); | |
266 | fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443); | |
267 | #endif | |
268 | iounmap(f); | |
269 | } | |
e174961c JB |
270 | printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n", |
271 | fsg_plat_eth[0].hwaddr); | |
272 | printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n", | |
273 | fsg_plat_eth[1].hwaddr); | |
7e36e2f5 RW |
274 | |
275 | } | |
276 | ||
277 | MACHINE_START(FSG, "Freecom FSG-3") | |
278 | /* Maintainer: www.nslu2-linux.org */ | |
7e36e2f5 | 279 | .map_io = ixp4xx_map_io, |
f449588c | 280 | .init_early = ixp4xx_init_early, |
7e36e2f5 | 281 | .init_irq = ixp4xx_init_irq, |
6bb27d73 | 282 | .init_time = ixp4xx_timer_init, |
e022c729 | 283 | .atag_offset = 0x100, |
7e36e2f5 | 284 | .init_machine = fsg_init, |
7553ee77 NP |
285 | #if defined(CONFIG_PCI) |
286 | .dma_zone_size = SZ_64M, | |
287 | #endif | |
d1b860fb | 288 | .restart = ixp4xx_restart, |
7e36e2f5 RW |
289 | MACHINE_END |
290 |