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License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[linux-2.6-block.git] / arch / arm / mach-ixp4xx / dsmg600-setup.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
28bd3a0d
MLJ		 2/*
3 * DSM-G600 board-setup
4 *
43816bcb 5 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
28bd3a0d 6 * Copyright (C) 2006 Tower Technologies
28bd3a0d 7 *
43816bcb 8 * based on ixdp425-setup.c:
28bd3a0d 9 * Copyright (C) 2003-2004 MontaVista Software, Inc.
43816bcb
RW		 10 * based on nslu2-power.c:
11 * Copyright (C) 2005 Tower Technologies
12 * based on nslu2-io.c:
13 * Copyright (C) 2004 Karen Spearel
28bd3a0d
MLJ		 14 *
15 * Author: Alessandro Zummo <a.zummo@towertech.it>
43816bcb
RW		 16 * Author: Michael Westerhof <mwester@dls.net>
17 * Author: Rod Whitby <rod@whitby.id.au>
28bd3a0d
MLJ		 18 * Maintainers: http://www.nslu2-linux.org/
19 */
2f8163ba 20#include <linux/gpio.h>
43816bcb
RW		 21#include <linux/irq.h>
22#include <linux/jiffies.h>
23#include <linux/timer.h>
28bd3a0d
MLJ		 24#include <linux/serial.h>
25#include <linux/serial_8250.h>
1208ebf2 26#include <linux/leds.h>
43816bcb 27#include <linux/reboot.h>
a9a424ce 28#include <linux/i2c.h>
5a4a2387 29#include <linux/i2c-gpio.h>
28bd3a0d 30
39f1601c
AB		 31#include <mach/hardware.h>
32
28bd3a0d
MLJ		 33#include <asm/mach-types.h>
34#include <asm/mach/arch.h>
35#include <asm/mach/flash.h>
435c5da0 36#include <asm/mach/time.h>
28bd3a0d 37
395e7127
KH		 38#define DSMG600_SDA_PIN 5
39#define DSMG600_SCL_PIN 4
40
41/* DSM-G600 Timer Setting */
42#define DSMG600_FREQ 66000000
43
44/* Buttons */
45#define DSMG600_PB_GPIO 15 /* power button */
46#define DSMG600_RB_GPIO 3 /* reset button */
47
48/* Power control */
49#define DSMG600_PO_GPIO 2 /* power off */
50
51/* LEDs */
52#define DSMG600_LED_PWR_GPIO 0
53#define DSMG600_LED_WLAN_GPIO 14
54
28bd3a0d
MLJ		 55static struct flash_platform_data dsmg600_flash_data = {
56 .map_name = "cfi_probe",
57 .width = 2,
58};
59
60static struct resource dsmg600_flash_resource = {
61 .flags = IORESOURCE_MEM,
62};
63
64static struct platform_device dsmg600_flash = {
65 .name = "IXP4XX-Flash",
66 .id = 0,
67 .dev.platform_data = &dsmg600_flash_data,
68 .num_resources = 1,
69 .resource = &dsmg600_flash_resource,
70};
71
5a4a2387 72static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
28bd3a0d
MLJ		 73 .sda_pin = DSMG600_SDA_PIN,
74 .scl_pin = DSMG600_SCL_PIN,
75};
76
5a4a2387
MLJ		 77static struct platform_device dsmg600_i2c_gpio = {
78 .name = "i2c-gpio",
28bd3a0d 79 .id = 0,
5a4a2387
MLJ		 80 .dev = {
81 .platform_data = &dsmg600_i2c_gpio_data,
82 },
28bd3a0d
MLJ		 83};
84
a9a424ce
RW		 85static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = {
86 {
3760f736 87 I2C_BOARD_INFO("pcf8563", 0x51),
a9a424ce
RW		 88 },
89};
90
1208ebf2 91static struct gpio_led dsmg600_led_pins[] = {
28bd3a0d 92 {
6c152bee 93 .name = "dsmg600:green:power",
1208ebf2 94 .gpio = DSMG600_LED_PWR_GPIO,
28bd3a0d
MLJ		 95 },
96 {
6c152bee 97 .name = "dsmg600:green:wlan",
1208ebf2
RW		 98 .gpio = DSMG600_LED_WLAN_GPIO,
99 .active_low = true,
28bd3a0d
MLJ		 100 },
101};
102
1208ebf2
RW		 103static struct gpio_led_platform_data dsmg600_led_data = {
104 .num_leds = ARRAY_SIZE(dsmg600_led_pins),
105 .leds = dsmg600_led_pins,
106};
107
28bd3a0d 108static struct platform_device dsmg600_leds = {
1208ebf2
RW		 109 .name = "leds-gpio",
110 .id = -1,
111 .dev.platform_data = &dsmg600_led_data,
28bd3a0d 112};
28bd3a0d
MLJ		 113
114static struct resource dsmg600_uart_resources[] = {
115 {
116 .start = IXP4XX_UART1_BASE_PHYS,
117 .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
118 .flags = IORESOURCE_MEM,
119 },
120 {
121 .start = IXP4XX_UART2_BASE_PHYS,
122 .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
123 .flags = IORESOURCE_MEM,
124 }
125};
126
127static struct plat_serial8250_port dsmg600_uart_data[] = {
128 {
129 .mapbase = IXP4XX_UART1_BASE_PHYS,
130 .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
131 .irq = IRQ_IXP4XX_UART1,
132 .flags = UPF_BOOT_AUTOCONF,
133 .iotype = UPIO_MEM,
134 .regshift = 2,
135 .uartclk = IXP4XX_UART_XTAL,
136 },
137 {
138 .mapbase = IXP4XX_UART2_BASE_PHYS,
139 .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
140 .irq = IRQ_IXP4XX_UART2,
141 .flags = UPF_BOOT_AUTOCONF,
142 .iotype = UPIO_MEM,
143 .regshift = 2,
144 .uartclk = IXP4XX_UART_XTAL,
145 },
146 { }
147};
148
149static struct platform_device dsmg600_uart = {
150 .name = "serial8250",
151 .id = PLAT8250_DEV_PLATFORM,
152 .dev.platform_data = dsmg600_uart_data,
153 .num_resources = ARRAY_SIZE(dsmg600_uart_resources),
154 .resource = dsmg600_uart_resources,
155};
156
157static struct platform_device *dsmg600_devices[] __initdata = {
5a4a2387 158 &dsmg600_i2c_gpio,
28bd3a0d 159 &dsmg600_flash,
1208ebf2 160 &dsmg600_leds,
28bd3a0d
MLJ		 161};
162
163static void dsmg600_power_off(void)
164{
8040dd09
LW		 165 /* enable the pwr cntl and drive it high */
166 gpio_direction_output(DSMG600_PO_GPIO, 1);
28bd3a0d
MLJ		 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 */
172static 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
177static void dsmg600_power_handler(unsigned long data);
178static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0);
179
180static 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" */
8040dd09 203 gpio_set_value(DSMG600_LED_PWR_GPIO, 0);
43816bcb
RW		 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
212static 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		 220static 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
8040dd09
LW		 229static int __init dsmg600_gpio_init(void)
230{
231 if (!machine_is_dsmg600())
232 return 0;
233
234 gpio_request(DSMG600_RB_GPIO, "reset button");
235 if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
1ee6564d 236 IRQF_TRIGGER_LOW, "DSM-G600 reset button", NULL) < 0) {
8040dd09
LW		 237
238 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
239 gpio_to_irq(DSMG600_RB_GPIO));
240 }
241
242 /*
243 * The power button on the D-Link DSM-G600 is on GPIO 15, but
244 * it cannot handle interrupts on that GPIO line. So we'll
245 * have to poll it with a kernel timer.
246 */
247
248 /* Make sure that the power button GPIO is set up as an input */
249 gpio_request(DSMG600_PB_GPIO, "power button");
250 gpio_direction_input(DSMG600_PB_GPIO);
251 /* Request poweroff GPIO line */
252 gpio_request(DSMG600_PO_GPIO, "power off button");
253
254 /* Set the initial value for the power button IRQ handler */
255 power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
256
257 mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
258 return 0;
259}
260device_initcall(dsmg600_gpio_init);
261
28bd3a0d
MLJ		 262static void __init dsmg600_init(void)
263{
264 ixp4xx_sys_init();
265
266 /* Make sure that GPIO14 and GPIO15 are not used as clocks */
267 *IXP4XX_GPIO_GPCLKR = 0;
268
269 dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
270 dsmg600_flash_resource.end =
271 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
272
a9a424ce
RW		 273 i2c_register_board_info(0, dsmg600_i2c_board_info,
274 ARRAY_SIZE(dsmg600_i2c_board_info));
275
28bd3a0d
MLJ		 276 /* The UART is required on the DSM-G600 (Redboot cannot use the
277 * NIC) -- do it here so that it does *not* get removed if
278 * platform_add_devices fails!
279 */
280 (void)platform_device_register(&dsmg600_uart);
281
282 platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
43816bcb
RW		 283
284 pm_power_off = dsmg600_power_off;
28bd3a0d
MLJ		 285}
286
28bd3a0d
MLJ		 287MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
288 /* Maintainer: www.nslu2-linux.org */
e022c729 289 .atag_offset = 0x100,
28bd3a0d 290 .map_io = ixp4xx_map_io,
f449588c 291 .init_early = ixp4xx_init_early,
28bd3a0d 292 .init_irq = ixp4xx_init_irq,
6bb27d73 293 .init_time = dsmg600_timer_init,
28bd3a0d 294 .init_machine = dsmg600_init,
7553ee77
NP		 295#if defined(CONFIG_PCI)
296 .dma_zone_size = SZ_64M,
297#endif
d1b860fb 298 .restart = ixp4xx_restart,
28bd3a0d 299MACHINE_END
Linux 6.x block layer and io_uring tree(s)