e7c6386782ede189976cb4cb6b59fa2b7af97497
[linux-2.6.git] / arch / arm / mach-ixp4xx / fsg-setup.c
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 #include <linux/io.h>
27
28 #include <asm/mach-types.h>
29 #include <asm/mach/arch.h>
30 #include <asm/mach/flash.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("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
183         ixp4xx_sys_init();
184
185         fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
186         fsg_flash_resource.end =
187                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
188
189         *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
190         *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
191
192         /* Configure CS2 for operation, 8bit and writable */
193         *IXP4XX_EXP_CS2 = 0xbfff0002;
194
195         i2c_register_board_info(0, fsg_i2c_board_info,
196                                 ARRAY_SIZE(fsg_i2c_board_info));
197
198         /* This is only useful on a modified machine, but it is valuable
199          * to have it first in order to see debug messages, and so that
200          * it does *not* get removed if platform_add_devices fails!
201          */
202         (void)platform_device_register(&fsg_uart);
203
204         platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
205
206         if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
207                         IRQF_DISABLED | IRQF_TRIGGER_LOW,
208                         "FSG reset button", NULL) < 0) {
209
210                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
211                         gpio_to_irq(FSG_RB_GPIO));
212         }
213
214         if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
215                         IRQF_DISABLED | IRQF_TRIGGER_LOW,
216                         "FSG power button", NULL) < 0) {
217
218                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
219                         gpio_to_irq(FSG_SB_GPIO));
220         }
221
222         /*
223          * Map in a portion of the flash and read the MAC addresses.
224          * Since it is stored in BE in the flash itself, we need to
225          * byteswap it if we're in LE mode.
226          */
227         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
228         if (f) {
229 #ifdef __ARMEB__
230                 int i;
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