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28bd3a0d MLJ |
1 | /* |
2 | * DSM-G600 board-setup | |
3 | * | |
43816bcb | 4 | * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> |
28bd3a0d | 5 | * Copyright (C) 2006 Tower Technologies |
28bd3a0d | 6 | * |
43816bcb | 7 | * based on ixdp425-setup.c: |
28bd3a0d | 8 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
43816bcb RW |
9 | * based on nslu2-power.c: |
10 | * Copyright (C) 2005 Tower Technologies | |
11 | * based on nslu2-io.c: | |
12 | * Copyright (C) 2004 Karen Spearel | |
28bd3a0d MLJ |
13 | * |
14 | * Author: Alessandro Zummo <a.zummo@towertech.it> | |
43816bcb RW |
15 | * Author: Michael Westerhof <mwester@dls.net> |
16 | * Author: Rod Whitby <rod@whitby.id.au> | |
28bd3a0d MLJ |
17 | * Maintainers: http://www.nslu2-linux.org/ |
18 | */ | |
2f8163ba | 19 | #include <linux/gpio.h> |
43816bcb RW |
20 | #include <linux/irq.h> |
21 | #include <linux/jiffies.h> | |
22 | #include <linux/timer.h> | |
28bd3a0d MLJ |
23 | #include <linux/serial.h> |
24 | #include <linux/serial_8250.h> | |
1208ebf2 | 25 | #include <linux/leds.h> |
43816bcb | 26 | #include <linux/reboot.h> |
a9a424ce | 27 | #include <linux/i2c.h> |
5a4a2387 | 28 | #include <linux/i2c-gpio.h> |
28bd3a0d MLJ |
29 | |
30 | #include <asm/mach-types.h> | |
31 | #include <asm/mach/arch.h> | |
32 | #include <asm/mach/flash.h> | |
435c5da0 | 33 | #include <asm/mach/time.h> |
28bd3a0d | 34 | |
395e7127 KH |
35 | #define DSMG600_SDA_PIN 5 |
36 | #define DSMG600_SCL_PIN 4 | |
37 | ||
38 | /* DSM-G600 Timer Setting */ | |
39 | #define DSMG600_FREQ 66000000 | |
40 | ||
41 | /* Buttons */ | |
42 | #define DSMG600_PB_GPIO 15 /* power button */ | |
43 | #define DSMG600_RB_GPIO 3 /* reset button */ | |
44 | ||
45 | /* Power control */ | |
46 | #define DSMG600_PO_GPIO 2 /* power off */ | |
47 | ||
48 | /* LEDs */ | |
49 | #define DSMG600_LED_PWR_GPIO 0 | |
50 | #define DSMG600_LED_WLAN_GPIO 14 | |
51 | ||
28bd3a0d MLJ |
52 | static struct flash_platform_data dsmg600_flash_data = { |
53 | .map_name = "cfi_probe", | |
54 | .width = 2, | |
55 | }; | |
56 | ||
57 | static struct resource dsmg600_flash_resource = { | |
58 | .flags = IORESOURCE_MEM, | |
59 | }; | |
60 | ||
61 | static struct platform_device dsmg600_flash = { | |
62 | .name = "IXP4XX-Flash", | |
63 | .id = 0, | |
64 | .dev.platform_data = &dsmg600_flash_data, | |
65 | .num_resources = 1, | |
66 | .resource = &dsmg600_flash_resource, | |
67 | }; | |
68 | ||
5a4a2387 | 69 | static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = { |
28bd3a0d MLJ |
70 | .sda_pin = DSMG600_SDA_PIN, |
71 | .scl_pin = DSMG600_SCL_PIN, | |
72 | }; | |
73 | ||
5a4a2387 MLJ |
74 | static struct platform_device dsmg600_i2c_gpio = { |
75 | .name = "i2c-gpio", | |
28bd3a0d | 76 | .id = 0, |
5a4a2387 MLJ |
77 | .dev = { |
78 | .platform_data = &dsmg600_i2c_gpio_data, | |
79 | }, | |
28bd3a0d MLJ |
80 | }; |
81 | ||
a9a424ce RW |
82 | static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = { |
83 | { | |
3760f736 | 84 | I2C_BOARD_INFO("pcf8563", 0x51), |
a9a424ce RW |
85 | }, |
86 | }; | |
87 | ||
1208ebf2 | 88 | static struct gpio_led dsmg600_led_pins[] = { |
28bd3a0d | 89 | { |
6c152bee | 90 | .name = "dsmg600:green:power", |
1208ebf2 | 91 | .gpio = DSMG600_LED_PWR_GPIO, |
28bd3a0d MLJ |
92 | }, |
93 | { | |
6c152bee | 94 | .name = "dsmg600:green:wlan", |
1208ebf2 RW |
95 | .gpio = DSMG600_LED_WLAN_GPIO, |
96 | .active_low = true, | |
28bd3a0d MLJ |
97 | }, |
98 | }; | |
99 | ||
1208ebf2 RW |
100 | static struct gpio_led_platform_data dsmg600_led_data = { |
101 | .num_leds = ARRAY_SIZE(dsmg600_led_pins), | |
102 | .leds = dsmg600_led_pins, | |
103 | }; | |
104 | ||
28bd3a0d | 105 | static struct platform_device dsmg600_leds = { |
1208ebf2 RW |
106 | .name = "leds-gpio", |
107 | .id = -1, | |
108 | .dev.platform_data = &dsmg600_led_data, | |
28bd3a0d | 109 | }; |
28bd3a0d MLJ |
110 | |
111 | static struct resource dsmg600_uart_resources[] = { | |
112 | { | |
113 | .start = IXP4XX_UART1_BASE_PHYS, | |
114 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
115 | .flags = IORESOURCE_MEM, | |
116 | }, | |
117 | { | |
118 | .start = IXP4XX_UART2_BASE_PHYS, | |
119 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
120 | .flags = IORESOURCE_MEM, | |
121 | } | |
122 | }; | |
123 | ||
124 | static struct plat_serial8250_port dsmg600_uart_data[] = { | |
125 | { | |
126 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
127 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
128 | .irq = IRQ_IXP4XX_UART1, | |
129 | .flags = UPF_BOOT_AUTOCONF, | |
130 | .iotype = UPIO_MEM, | |
131 | .regshift = 2, | |
132 | .uartclk = IXP4XX_UART_XTAL, | |
133 | }, | |
134 | { | |
135 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
136 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
137 | .irq = IRQ_IXP4XX_UART2, | |
138 | .flags = UPF_BOOT_AUTOCONF, | |
139 | .iotype = UPIO_MEM, | |
140 | .regshift = 2, | |
141 | .uartclk = IXP4XX_UART_XTAL, | |
142 | }, | |
143 | { } | |
144 | }; | |
145 | ||
146 | static struct platform_device dsmg600_uart = { | |
147 | .name = "serial8250", | |
148 | .id = PLAT8250_DEV_PLATFORM, | |
149 | .dev.platform_data = dsmg600_uart_data, | |
150 | .num_resources = ARRAY_SIZE(dsmg600_uart_resources), | |
151 | .resource = dsmg600_uart_resources, | |
152 | }; | |
153 | ||
154 | static struct platform_device *dsmg600_devices[] __initdata = { | |
5a4a2387 | 155 | &dsmg600_i2c_gpio, |
28bd3a0d | 156 | &dsmg600_flash, |
1208ebf2 | 157 | &dsmg600_leds, |
28bd3a0d MLJ |
158 | }; |
159 | ||
160 | static void dsmg600_power_off(void) | |
161 | { | |
162 | /* enable the pwr cntl gpio */ | |
163 | gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT); | |
164 | ||
165 | /* poweroff */ | |
166 | gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH); | |
167 | } | |
168 | ||
43816bcb RW |
169 | /* This is used to make sure the power-button pusher is serious. The button |
170 | * must be held until the value of this counter reaches zero. | |
171 | */ | |
172 | static int power_button_countdown; | |
173 | ||
174 | /* Must hold the button down for at least this many counts to be processed */ | |
175 | #define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ | |
176 | ||
177 | static void dsmg600_power_handler(unsigned long data); | |
178 | static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0); | |
179 | ||
180 | static void dsmg600_power_handler(unsigned long data) | |
181 | { | |
182 | /* This routine is called twice per second to check the | |
183 | * state of the power button. | |
184 | */ | |
185 | ||
186 | if (gpio_get_value(DSMG600_PB_GPIO)) { | |
187 | ||
188 | /* IO Pin is 1 (button pushed) */ | |
189 | if (power_button_countdown > 0) | |
190 | power_button_countdown--; | |
191 | ||
192 | } else { | |
193 | ||
194 | /* Done on button release, to allow for auto-power-on mods. */ | |
195 | if (power_button_countdown == 0) { | |
196 | /* Signal init to do the ctrlaltdel action, | |
197 | * this will bypass init if it hasn't started | |
198 | * and do a kernel_restart. | |
199 | */ | |
200 | ctrl_alt_del(); | |
201 | ||
202 | /* Change the state of the power LED to "blink" */ | |
203 | gpio_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW); | |
204 | } else { | |
205 | power_button_countdown = PBUTTON_HOLDDOWN_COUNT; | |
206 | } | |
207 | } | |
208 | ||
209 | mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500)); | |
210 | } | |
211 | ||
212 | static irqreturn_t dsmg600_reset_handler(int irq, void *dev_id) | |
213 | { | |
214 | /* This is the paper-clip reset, it shuts the machine down directly. */ | |
215 | machine_power_off(); | |
216 | ||
217 | return IRQ_HANDLED; | |
218 | } | |
219 | ||
435c5da0 MLJ |
220 | static void __init dsmg600_timer_init(void) |
221 | { | |
222 | /* The xtal on this machine is non-standard. */ | |
223 | ixp4xx_timer_freq = DSMG600_FREQ; | |
224 | ||
225 | /* Call standard timer_init function. */ | |
226 | ixp4xx_timer_init(); | |
227 | } | |
228 | ||
28bd3a0d MLJ |
229 | static void __init dsmg600_init(void) |
230 | { | |
231 | ixp4xx_sys_init(); | |
232 | ||
233 | /* Make sure that GPIO14 and GPIO15 are not used as clocks */ | |
234 | *IXP4XX_GPIO_GPCLKR = 0; | |
235 | ||
236 | dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); | |
237 | dsmg600_flash_resource.end = | |
238 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
239 | ||
a9a424ce RW |
240 | i2c_register_board_info(0, dsmg600_i2c_board_info, |
241 | ARRAY_SIZE(dsmg600_i2c_board_info)); | |
242 | ||
28bd3a0d MLJ |
243 | /* The UART is required on the DSM-G600 (Redboot cannot use the |
244 | * NIC) -- do it here so that it does *not* get removed if | |
245 | * platform_add_devices fails! | |
246 | */ | |
247 | (void)platform_device_register(&dsmg600_uart); | |
248 | ||
249 | platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices)); | |
43816bcb RW |
250 | |
251 | pm_power_off = dsmg600_power_off; | |
252 | ||
253 | if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler, | |
254 | IRQF_DISABLED | IRQF_TRIGGER_LOW, | |
255 | "DSM-G600 reset button", NULL) < 0) { | |
256 | ||
257 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
258 | gpio_to_irq(DSMG600_RB_GPIO)); | |
259 | } | |
260 | ||
261 | /* The power button on the D-Link DSM-G600 is on GPIO 15, but | |
262 | * it cannot handle interrupts on that GPIO line. So we'll | |
263 | * have to poll it with a kernel timer. | |
264 | */ | |
265 | ||
266 | /* Make sure that the power button GPIO is set up as an input */ | |
267 | gpio_line_config(DSMG600_PB_GPIO, IXP4XX_GPIO_IN); | |
268 | ||
269 | /* Set the initial value for the power button IRQ handler */ | |
270 | power_button_countdown = PBUTTON_HOLDDOWN_COUNT; | |
271 | ||
272 | mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500)); | |
28bd3a0d MLJ |
273 | } |
274 | ||
28bd3a0d MLJ |
275 | MACHINE_START(DSMG600, "D-Link DSM-G600 RevA") |
276 | /* Maintainer: www.nslu2-linux.org */ | |
e022c729 | 277 | .atag_offset = 0x100, |
28bd3a0d | 278 | .map_io = ixp4xx_map_io, |
f449588c | 279 | .init_early = ixp4xx_init_early, |
28bd3a0d | 280 | .init_irq = ixp4xx_init_irq, |
6bb27d73 | 281 | .init_time = dsmg600_timer_init, |
28bd3a0d | 282 | .init_machine = dsmg600_init, |
7553ee77 NP |
283 | #if defined(CONFIG_PCI) |
284 | .dma_zone_size = SZ_64M, | |
285 | #endif | |
d1b860fb | 286 | .restart = ixp4xx_restart, |
28bd3a0d | 287 | MACHINE_END |