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7e36e2f5 RW |
1 | /* |
2 | * arch/arm/mach-ixp4xx/fsg-setup.c | |
3 | * | |
4 | * FSG board-setup | |
5 | * | |
6 | * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> | |
7 | * | |
8 | * based on ixdp425-setup.c: | |
9 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
10 | * based on nslu2-power.c | |
11 | * Copyright (C) 2005 Tower Technologies | |
12 | * | |
13 | * Author: Rod Whitby <rod@whitby.id.au> | |
14 | * Maintainers: http://www.nslu2-linux.org/ | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/if_ether.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/serial.h> | |
21 | #include <linux/serial_8250.h> | |
22 | #include <linux/leds.h> | |
23 | #include <linux/reboot.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/i2c-gpio.h> | |
26 | ||
27 | #include <asm/mach-types.h> | |
28 | #include <asm/mach/arch.h> | |
29 | #include <asm/mach/flash.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/gpio.h> | |
32 | ||
33 | static struct flash_platform_data fsg_flash_data = { | |
34 | .map_name = "cfi_probe", | |
35 | .width = 2, | |
36 | }; | |
37 | ||
38 | static struct resource fsg_flash_resource = { | |
39 | .flags = IORESOURCE_MEM, | |
40 | }; | |
41 | ||
42 | static struct platform_device fsg_flash = { | |
43 | .name = "IXP4XX-Flash", | |
44 | .id = 0, | |
45 | .dev = { | |
46 | .platform_data = &fsg_flash_data, | |
47 | }, | |
48 | .num_resources = 1, | |
49 | .resource = &fsg_flash_resource, | |
50 | }; | |
51 | ||
52 | static struct i2c_gpio_platform_data fsg_i2c_gpio_data = { | |
53 | .sda_pin = FSG_SDA_PIN, | |
54 | .scl_pin = FSG_SCL_PIN, | |
55 | }; | |
56 | ||
57 | static struct platform_device fsg_i2c_gpio = { | |
58 | .name = "i2c-gpio", | |
59 | .id = 0, | |
60 | .dev = { | |
61 | .platform_data = &fsg_i2c_gpio_data, | |
62 | }, | |
63 | }; | |
64 | ||
65 | static struct i2c_board_info __initdata fsg_i2c_board_info [] = { | |
66 | { | |
67 | I2C_BOARD_INFO("rtc-isl1208", 0x6f), | |
68 | }, | |
69 | }; | |
70 | ||
71 | static struct resource fsg_uart_resources[] = { | |
72 | { | |
73 | .start = IXP4XX_UART1_BASE_PHYS, | |
74 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
75 | .flags = IORESOURCE_MEM, | |
76 | }, | |
77 | { | |
78 | .start = IXP4XX_UART2_BASE_PHYS, | |
79 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
80 | .flags = IORESOURCE_MEM, | |
81 | } | |
82 | }; | |
83 | ||
84 | static struct plat_serial8250_port fsg_uart_data[] = { | |
85 | { | |
86 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
87 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
88 | .irq = IRQ_IXP4XX_UART1, | |
89 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
90 | .iotype = UPIO_MEM, | |
91 | .regshift = 2, | |
92 | .uartclk = IXP4XX_UART_XTAL, | |
93 | }, | |
94 | { | |
95 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
96 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
97 | .irq = IRQ_IXP4XX_UART2, | |
98 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
99 | .iotype = UPIO_MEM, | |
100 | .regshift = 2, | |
101 | .uartclk = IXP4XX_UART_XTAL, | |
102 | }, | |
103 | { } | |
104 | }; | |
105 | ||
106 | static struct platform_device fsg_uart = { | |
107 | .name = "serial8250", | |
108 | .id = PLAT8250_DEV_PLATFORM, | |
109 | .dev = { | |
110 | .platform_data = fsg_uart_data, | |
111 | }, | |
112 | .num_resources = ARRAY_SIZE(fsg_uart_resources), | |
113 | .resource = fsg_uart_resources, | |
114 | }; | |
115 | ||
116 | static struct platform_device fsg_leds = { | |
117 | .name = "fsg-led", | |
118 | .id = -1, | |
119 | }; | |
120 | ||
121 | /* Built-in 10/100 Ethernet MAC interfaces */ | |
122 | static struct eth_plat_info fsg_plat_eth[] = { | |
123 | { | |
124 | .phy = 5, | |
125 | .rxq = 3, | |
126 | .txreadyq = 20, | |
127 | }, { | |
128 | .phy = 4, | |
129 | .rxq = 4, | |
130 | .txreadyq = 21, | |
131 | } | |
132 | }; | |
133 | ||
134 | static struct platform_device fsg_eth[] = { | |
135 | { | |
136 | .name = "ixp4xx_eth", | |
137 | .id = IXP4XX_ETH_NPEB, | |
138 | .dev = { | |
139 | .platform_data = fsg_plat_eth, | |
140 | }, | |
141 | }, { | |
142 | .name = "ixp4xx_eth", | |
143 | .id = IXP4XX_ETH_NPEC, | |
144 | .dev = { | |
145 | .platform_data = fsg_plat_eth + 1, | |
146 | }, | |
147 | } | |
148 | }; | |
149 | ||
150 | static struct platform_device *fsg_devices[] __initdata = { | |
151 | &fsg_i2c_gpio, | |
152 | &fsg_flash, | |
153 | &fsg_leds, | |
154 | &fsg_eth[0], | |
155 | &fsg_eth[1], | |
156 | }; | |
157 | ||
158 | static irqreturn_t fsg_power_handler(int irq, void *dev_id) | |
159 | { | |
160 | /* Signal init to do the ctrlaltdel action, this will bypass init if | |
161 | * it hasn't started and do a kernel_restart. | |
162 | */ | |
163 | ctrl_alt_del(); | |
164 | ||
165 | return IRQ_HANDLED; | |
166 | } | |
167 | ||
168 | static irqreturn_t fsg_reset_handler(int irq, void *dev_id) | |
169 | { | |
170 | /* This is the paper-clip reset which does an emergency reboot. */ | |
171 | printk(KERN_INFO "Restarting system.\n"); | |
172 | machine_restart(NULL); | |
173 | ||
174 | /* This should never be reached. */ | |
175 | return IRQ_HANDLED; | |
176 | } | |
177 | ||
178 | static void __init fsg_init(void) | |
179 | { | |
180 | DECLARE_MAC_BUF(mac_buf); | |
181 | uint8_t __iomem *f; | |
182 | int i; | |
183 | ||
184 | ixp4xx_sys_init(); | |
185 | ||
186 | fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); | |
187 | fsg_flash_resource.end = | |
188 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
189 | ||
190 | *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE; | |
191 | *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0; | |
192 | ||
193 | /* Configure CS2 for operation, 8bit and writable */ | |
194 | *IXP4XX_EXP_CS2 = 0xbfff0002; | |
195 | ||
196 | i2c_register_board_info(0, fsg_i2c_board_info, | |
197 | ARRAY_SIZE(fsg_i2c_board_info)); | |
198 | ||
199 | /* This is only useful on a modified machine, but it is valuable | |
200 | * to have it first in order to see debug messages, and so that | |
201 | * it does *not* get removed if platform_add_devices fails! | |
202 | */ | |
203 | (void)platform_device_register(&fsg_uart); | |
204 | ||
205 | platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices)); | |
206 | ||
207 | if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler, | |
208 | IRQF_DISABLED | IRQF_TRIGGER_LOW, | |
209 | "FSG reset button", NULL) < 0) { | |
210 | ||
211 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
212 | gpio_to_irq(FSG_RB_GPIO)); | |
213 | } | |
214 | ||
215 | if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler, | |
216 | IRQF_DISABLED | IRQF_TRIGGER_LOW, | |
217 | "FSG power button", NULL) < 0) { | |
218 | ||
219 | printk(KERN_DEBUG "Power Button IRQ %d not available\n", | |
220 | gpio_to_irq(FSG_SB_GPIO)); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Map in a portion of the flash and read the MAC addresses. | |
225 | * Since it is stored in BE in the flash itself, we need to | |
226 | * byteswap it if we're in LE mode. | |
227 | */ | |
228 | f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000); | |
229 | if (f) { | |
230 | #ifdef __ARMEB__ | |
231 | for (i = 0; i < 6; i++) { | |
232 | fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i); | |
233 | fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i); | |
234 | } | |
235 | #else | |
236 | ||
237 | /* | |
238 | Endian-swapped reads from unaligned addresses are | |
239 | required to extract the two MACs from the big-endian | |
240 | Redboot config area in flash. | |
241 | */ | |
242 | ||
243 | fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421); | |
244 | fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420); | |
245 | fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427); | |
246 | fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426); | |
247 | fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425); | |
248 | fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424); | |
249 | ||
250 | fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439); | |
251 | fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F); | |
252 | fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E); | |
253 | fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D); | |
254 | fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C); | |
255 | fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443); | |
256 | #endif | |
257 | iounmap(f); | |
258 | } | |
259 | printk(KERN_INFO "FSG: Using MAC address %s for port 0\n", | |
260 | print_mac(mac_buf, fsg_plat_eth[0].hwaddr)); | |
261 | printk(KERN_INFO "FSG: Using MAC address %s for port 1\n", | |
262 | print_mac(mac_buf, fsg_plat_eth[1].hwaddr)); | |
263 | ||
264 | } | |
265 | ||
266 | MACHINE_START(FSG, "Freecom FSG-3") | |
267 | /* Maintainer: www.nslu2-linux.org */ | |
268 | .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS, | |
269 | .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xfffc, | |
270 | .map_io = ixp4xx_map_io, | |
271 | .init_irq = ixp4xx_init_irq, | |
272 | .timer = &ixp4xx_timer, | |
273 | .boot_params = 0x0100, | |
274 | .init_machine = fsg_init, | |
275 | MACHINE_END | |
276 |