Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
[linux-2.6] / arch / arm / mach-ixp4xx / nas100d-setup.c
1 /*
2  * arch/arm/mach-ixp4xx/nas100d-setup.c
3  *
4  * NAS 100d 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 nas100d-power.c:
11  *      Copyright (C) 2005 Tower Technologies
12  * based on nas100d-io.c
13  *      Copyright (C) 2004 Karen Spearel
14  *
15  * Author: Alessandro Zummo <a.zummo@towertech.it>
16  * Author: Rod Whitby <rod@whitby.id.au>
17  * Maintainers: http://www.nslu2-linux.org/
18  *
19  */
20
21 #include <linux/if_ether.h>
22 #include <linux/irq.h>
23 #include <linux/jiffies.h>
24 #include <linux/timer.h>
25 #include <linux/serial.h>
26 #include <linux/serial_8250.h>
27 #include <linux/leds.h>
28 #include <linux/reboot.h>
29 #include <linux/i2c.h>
30 #include <linux/i2c-gpio.h>
31 #include <linux/io.h>
32
33 #include <asm/mach-types.h>
34 #include <asm/mach/arch.h>
35 #include <asm/mach/flash.h>
36 #include <asm/gpio.h>
37
38 static struct flash_platform_data nas100d_flash_data = {
39         .map_name               = "cfi_probe",
40         .width                  = 2,
41 };
42
43 static struct resource nas100d_flash_resource = {
44         .flags                  = IORESOURCE_MEM,
45 };
46
47 static struct platform_device nas100d_flash = {
48         .name                   = "IXP4XX-Flash",
49         .id                     = 0,
50         .dev.platform_data      = &nas100d_flash_data,
51         .num_resources          = 1,
52         .resource               = &nas100d_flash_resource,
53 };
54
55 static struct i2c_board_info __initdata nas100d_i2c_board_info [] = {
56         {
57                 I2C_BOARD_INFO("pcf8563", 0x51),
58         },
59 };
60
61 static struct gpio_led nas100d_led_pins[] = {
62         {
63                 .name           = "nas100d:green:wlan",
64                 .gpio           = NAS100D_LED_WLAN_GPIO,
65                 .active_low     = true,
66         },
67         {
68                 .name           = "nas100d:blue:power",  /* (off=flashing) */
69                 .gpio           = NAS100D_LED_PWR_GPIO,
70                 .active_low     = true,
71         },
72         {
73                 .name           = "nas100d:yellow:disk",
74                 .gpio           = NAS100D_LED_DISK_GPIO,
75                 .active_low     = true,
76         },
77 };
78
79 static struct gpio_led_platform_data nas100d_led_data = {
80         .num_leds               = ARRAY_SIZE(nas100d_led_pins),
81         .leds                   = nas100d_led_pins,
82 };
83
84 static struct platform_device nas100d_leds = {
85         .name                   = "leds-gpio",
86         .id                     = -1,
87         .dev.platform_data      = &nas100d_led_data,
88 };
89
90 static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = {
91         .sda_pin                = NAS100D_SDA_PIN,
92         .scl_pin                = NAS100D_SCL_PIN,
93 };
94
95 static struct platform_device nas100d_i2c_gpio = {
96         .name                   = "i2c-gpio",
97         .id                     = 0,
98         .dev     = {
99                 .platform_data  = &nas100d_i2c_gpio_data,
100         },
101 };
102
103 static struct resource nas100d_uart_resources[] = {
104         {
105                 .start          = IXP4XX_UART1_BASE_PHYS,
106                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
107                 .flags          = IORESOURCE_MEM,
108         },
109         {
110                 .start          = IXP4XX_UART2_BASE_PHYS,
111                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
112                 .flags          = IORESOURCE_MEM,
113         }
114 };
115
116 static struct plat_serial8250_port nas100d_uart_data[] = {
117         {
118                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
119                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
120                 .irq            = IRQ_IXP4XX_UART1,
121                 .flags          = UPF_BOOT_AUTOCONF,
122                 .iotype         = UPIO_MEM,
123                 .regshift       = 2,
124                 .uartclk        = IXP4XX_UART_XTAL,
125         },
126         {
127                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
128                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
129                 .irq            = IRQ_IXP4XX_UART2,
130                 .flags          = UPF_BOOT_AUTOCONF,
131                 .iotype         = UPIO_MEM,
132                 .regshift       = 2,
133                 .uartclk        = IXP4XX_UART_XTAL,
134         },
135         { }
136 };
137
138 static struct platform_device nas100d_uart = {
139         .name                   = "serial8250",
140         .id                     = PLAT8250_DEV_PLATFORM,
141         .dev.platform_data      = nas100d_uart_data,
142         .num_resources          = 2,
143         .resource               = nas100d_uart_resources,
144 };
145
146 /* Built-in 10/100 Ethernet MAC interfaces */
147 static struct eth_plat_info nas100d_plat_eth[] = {
148         {
149                 .phy            = 0,
150                 .rxq            = 3,
151                 .txreadyq       = 20,
152         }
153 };
154
155 static struct platform_device nas100d_eth[] = {
156         {
157                 .name                   = "ixp4xx_eth",
158                 .id                     = IXP4XX_ETH_NPEB,
159                 .dev.platform_data      = nas100d_plat_eth,
160         }
161 };
162
163 static struct platform_device *nas100d_devices[] __initdata = {
164         &nas100d_i2c_gpio,
165         &nas100d_flash,
166         &nas100d_leds,
167         &nas100d_eth[0],
168 };
169
170 static void nas100d_power_off(void)
171 {
172         /* This causes the box to drop the power and go dead. */
173
174         /* enable the pwr cntl gpio */
175         gpio_line_config(NAS100D_PO_GPIO, IXP4XX_GPIO_OUT);
176
177         /* do the deed */
178         gpio_line_set(NAS100D_PO_GPIO, IXP4XX_GPIO_HIGH);
179 }
180
181 /* This is used to make sure the power-button pusher is serious.  The button
182  * must be held until the value of this counter reaches zero.
183  */
184 static int power_button_countdown;
185
186 /* Must hold the button down for at least this many counts to be processed */
187 #define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
188
189 static void nas100d_power_handler(unsigned long data);
190 static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0);
191
192 static void nas100d_power_handler(unsigned long data)
193 {
194         /* This routine is called twice per second to check the
195          * state of the power button.
196          */
197
198         if (gpio_get_value(NAS100D_PB_GPIO)) {
199
200                 /* IO Pin is 1 (button pushed) */
201                 if (power_button_countdown > 0)
202                         power_button_countdown--;
203
204         } else {
205
206                 /* Done on button release, to allow for auto-power-on mods. */
207                 if (power_button_countdown == 0) {
208                         /* Signal init to do the ctrlaltdel action,
209                          * this will bypass init if it hasn't started
210                          * and do a kernel_restart.
211                          */
212                         ctrl_alt_del();
213
214                         /* Change the state of the power LED to "blink" */
215                         gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
216                 } else {
217                         power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
218                 }
219         }
220
221         mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
222 }
223
224 static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
225 {
226         /* This is the paper-clip reset, it shuts the machine down directly. */
227         machine_power_off();
228
229         return IRQ_HANDLED;
230 }
231
232 static void __init nas100d_init(void)
233 {
234         DECLARE_MAC_BUF(mac_buf);
235         uint8_t __iomem *f;
236         int i;
237
238         ixp4xx_sys_init();
239
240         /* gpio 14 and 15 are _not_ clocks */
241         *IXP4XX_GPIO_GPCLKR = 0;
242
243         nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
244         nas100d_flash_resource.end =
245                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
246
247         i2c_register_board_info(0, nas100d_i2c_board_info,
248                                 ARRAY_SIZE(nas100d_i2c_board_info));
249
250         /*
251          * This is only useful on a modified machine, but it is valuable
252          * to have it first in order to see debug messages, and so that
253          * it does *not* get removed if platform_add_devices fails!
254          */
255         (void)platform_device_register(&nas100d_uart);
256
257         platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices));
258
259         pm_power_off = nas100d_power_off;
260
261         if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler,
262                 IRQF_DISABLED | IRQF_TRIGGER_LOW,
263                 "NAS100D reset button", NULL) < 0) {
264
265                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
266                         gpio_to_irq(NAS100D_RB_GPIO));
267         }
268
269         /* The power button on the Iomega NAS100d is on GPIO 14, but
270          * it cannot handle interrupts on that GPIO line.  So we'll
271          * have to poll it with a kernel timer.
272          */
273
274         /* Make sure that the power button GPIO is set up as an input */
275         gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN);
276
277         /* Set the initial value for the power button IRQ handler */
278         power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
279
280         mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
281
282         /*
283          * Map in a portion of the flash and read the MAC address.
284          * Since it is stored in BE in the flash itself, we need to
285          * byteswap it if we're in LE mode.
286          */
287         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000);
288         if (f) {
289                 for (i = 0; i < 6; i++)
290 #ifdef __ARMEB__
291                         nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i);
292 #else
293                         nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3));
294 #endif
295                 iounmap(f);
296         }
297         printk(KERN_INFO "NAS100D: Using MAC address %s for port 0\n",
298                print_mac(mac_buf, nas100d_plat_eth[0].hwaddr));
299
300 }
301
302 MACHINE_START(NAS100D, "Iomega NAS 100d")
303         /* Maintainer: www.nslu2-linux.org */
304         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
305         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
306         .boot_params    = 0x00000100,
307         .map_io         = ixp4xx_map_io,
308         .init_irq       = ixp4xx_init_irq,
309         .timer          = &ixp4xx_timer,
310         .init_machine   = nas100d_init,
311 MACHINE_END