1 /*
2 * arch/arm/mach-iop32x/n2100.c
3 *
4 * Board support code for the Thecus N2100 platform.
5 *
6 * Author: Rory Bolt <rorybolt@pacbell.net>
7 * Copyright (C) 2002 Rory Bolt
8 * Copyright 2003 (c) MontaVista, Software, Inc.
9 * Copyright (C) 2004 Intel Corp.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17 #include <linux/mm.h>
18 #include <linux/init.h>
19 #include <linux/f75375s.h>
20 #include <linux/leds-pca9532.h>
21 #include <linux/delay.h>
22 #include <linux/kernel.h>
23 #include <linux/pci.h>
24 #include <linux/pm.h>
25 #include <linux/string.h>
26 #include <linux/serial_core.h>
27 #include <linux/serial_8250.h>
28 #include <linux/mtd/physmap.h>
29 #include <linux/i2c.h>
30 #include <linux/platform_device.h>
31 #include <linux/reboot.h>
32 #include <linux/io.h>
33 #include <linux/gpio.h>
34 #include <mach/hardware.h>
35 #include <asm/irq.h>
36 #include <asm/mach/arch.h>
37 #include <asm/mach/map.h>
38 #include <asm/mach/pci.h>
39 #include <asm/mach/time.h>
40 #include <asm/mach-types.h>
41 #include <asm/page.h>
42 #include <asm/pgtable.h>
43 #include <mach/time.h>
44 #include "gpio-iop32x.h"
45
46 /*
47 * N2100 timer tick configuration.
48 */
n2100_timer_init(void)49 static void __init n2100_timer_init(void)
50 {
51 /* 33.000 MHz crystal. */
52 iop_init_time(198000000);
53 }
54
55
56 /*
57 * N2100 I/O.
58 */
59 static struct map_desc n2100_io_desc[] __initdata = {
60 { /* on-board devices */
61 .virtual = N2100_UART,
62 .pfn = __phys_to_pfn(N2100_UART),
63 .length = 0x00100000,
64 .type = MT_DEVICE
65 },
66 };
67
n2100_map_io(void)68 void __init n2100_map_io(void)
69 {
70 iop3xx_map_io();
71 iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
72 }
73
74
75 /*
76 * N2100 PCI.
77 */
78 static int __init
n2100_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)79 n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
80 {
81 int irq;
82
83 if (PCI_SLOT(dev->devfn) == 1) {
84 /* RTL8110SB #1 */
85 irq = IRQ_IOP32X_XINT0;
86 } else if (PCI_SLOT(dev->devfn) == 2) {
87 /* RTL8110SB #2 */
88 irq = IRQ_IOP32X_XINT3;
89 } else if (PCI_SLOT(dev->devfn) == 3) {
90 /* Sil3512 */
91 irq = IRQ_IOP32X_XINT2;
92 } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
93 /* VT6212 INTA */
94 irq = IRQ_IOP32X_XINT1;
95 } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
96 /* VT6212 INTB */
97 irq = IRQ_IOP32X_XINT0;
98 } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
99 /* VT6212 INTC */
100 irq = IRQ_IOP32X_XINT2;
101 } else if (PCI_SLOT(dev->devfn) == 5) {
102 /* Mini-PCI slot */
103 irq = IRQ_IOP32X_XINT3;
104 } else {
105 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
106 "device PCI:%d:%d:%d\n", dev->bus->number,
107 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
108 irq = -1;
109 }
110
111 return irq;
112 }
113
114 static struct hw_pci n2100_pci __initdata = {
115 .nr_controllers = 1,
116 .ops = &iop3xx_ops,
117 .setup = iop3xx_pci_setup,
118 .preinit = iop3xx_pci_preinit,
119 .map_irq = n2100_pci_map_irq,
120 };
121
122 /*
123 * Both r8169 chips on the n2100 exhibit PCI parity problems. Set
124 * the ->broken_parity_status flag for both ports so that the r8169
125 * driver knows it should ignore error interrupts.
126 */
n2100_fixup_r8169(struct pci_dev * dev)127 static void n2100_fixup_r8169(struct pci_dev *dev)
128 {
129 if (dev->bus->number == 0 &&
130 (dev->devfn == PCI_DEVFN(1, 0) ||
131 dev->devfn == PCI_DEVFN(2, 0)))
132 dev->broken_parity_status = 1;
133 }
134 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
135
n2100_pci_init(void)136 static int __init n2100_pci_init(void)
137 {
138 if (machine_is_n2100())
139 pci_common_init(&n2100_pci);
140
141 return 0;
142 }
143
144 subsys_initcall(n2100_pci_init);
145
146
147 /*
148 * N2100 machine initialisation.
149 */
150 static struct physmap_flash_data n2100_flash_data = {
151 .width = 2,
152 };
153
154 static struct resource n2100_flash_resource = {
155 .start = 0xf0000000,
156 .end = 0xf0ffffff,
157 .flags = IORESOURCE_MEM,
158 };
159
160 static struct platform_device n2100_flash_device = {
161 .name = "physmap-flash",
162 .id = 0,
163 .dev = {
164 .platform_data = &n2100_flash_data,
165 },
166 .num_resources = 1,
167 .resource = &n2100_flash_resource,
168 };
169
170
171 static struct plat_serial8250_port n2100_serial_port[] = {
172 {
173 .mapbase = N2100_UART,
174 .membase = (char *)N2100_UART,
175 .irq = 0,
176 .flags = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
177 .iotype = UPIO_MEM,
178 .regshift = 0,
179 .uartclk = 1843200,
180 },
181 { },
182 };
183
184 static struct resource n2100_uart_resource = {
185 .start = N2100_UART,
186 .end = N2100_UART + 7,
187 .flags = IORESOURCE_MEM,
188 };
189
190 static struct platform_device n2100_serial_device = {
191 .name = "serial8250",
192 .id = PLAT8250_DEV_PLATFORM,
193 .dev = {
194 .platform_data = n2100_serial_port,
195 },
196 .num_resources = 1,
197 .resource = &n2100_uart_resource,
198 };
199
200 static struct f75375s_platform_data n2100_f75375s = {
201 .pwm = { 255, 255 },
202 .pwm_enable = { 0, 0 },
203 };
204
205 static struct pca9532_platform_data n2100_leds = {
206 .leds = {
207 { .name = "n2100:red:satafail0",
208 .state = PCA9532_OFF,
209 .type = PCA9532_TYPE_LED,
210 },
211 { .name = "n2100:red:satafail1",
212 .state = PCA9532_OFF,
213 .type = PCA9532_TYPE_LED,
214 },
215 { .name = "n2100:blue:usb",
216 .state = PCA9532_OFF,
217 .type = PCA9532_TYPE_LED,
218 },
219 { .type = PCA9532_TYPE_NONE },
220
221 { .type = PCA9532_TYPE_NONE },
222 { .type = PCA9532_TYPE_NONE },
223 { .type = PCA9532_TYPE_NONE },
224 { .name = "n2100:red:usb",
225 .state = PCA9532_OFF,
226 .type = PCA9532_TYPE_LED,
227 },
228
229 { .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
230 { .type = PCA9532_TYPE_NONE }, /* reset gpio */
231 { .type = PCA9532_TYPE_NONE },
232 { .type = PCA9532_TYPE_NONE },
233
234 { .type = PCA9532_TYPE_NONE },
235 { .name = "n2100:orange:system",
236 .state = PCA9532_OFF,
237 .type = PCA9532_TYPE_LED,
238 },
239 { .name = "n2100:red:system",
240 .state = PCA9532_OFF,
241 .type = PCA9532_TYPE_LED,
242 },
243 { .name = "N2100 beeper" ,
244 .state = PCA9532_OFF,
245 .type = PCA9532_TYPE_N2100_BEEP,
246 },
247 },
248 .psc = { 0, 0 },
249 .pwm = { 0, 0 },
250 };
251
252 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
253 {
254 I2C_BOARD_INFO("rs5c372b", 0x32),
255 },
256 {
257 I2C_BOARD_INFO("f75375", 0x2e),
258 .platform_data = &n2100_f75375s,
259 },
260 {
261 I2C_BOARD_INFO("pca9532", 0x60),
262 .platform_data = &n2100_leds,
263 },
264 };
265
266 /*
267 * Pull PCA9532 GPIO #8 low to power off the machine.
268 */
n2100_power_off(void)269 static void n2100_power_off(void)
270 {
271 local_irq_disable();
272
273 /* Start condition, I2C address of PCA9532, write transaction. */
274 *IOP3XX_IDBR0 = 0xc0;
275 *IOP3XX_ICR0 = 0xe9;
276 mdelay(1);
277
278 /* Write address 0x08. */
279 *IOP3XX_IDBR0 = 0x08;
280 *IOP3XX_ICR0 = 0xe8;
281 mdelay(1);
282
283 /* Write data 0x01, stop condition. */
284 *IOP3XX_IDBR0 = 0x01;
285 *IOP3XX_ICR0 = 0xea;
286
287 while (1)
288 ;
289 }
290
n2100_restart(enum reboot_mode mode,const char * cmd)291 static void n2100_restart(enum reboot_mode mode, const char *cmd)
292 {
293 int ret;
294
295 ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
296 if (ret) {
297 pr_crit("could not drive reset GPIO low\n");
298 return;
299 }
300 /* Wait for reset to happen */
301 while (1)
302 ;
303 }
304
305
306 static struct timer_list power_button_poll_timer;
307
power_button_poll(struct timer_list * unused)308 static void power_button_poll(struct timer_list *unused)
309 {
310 if (gpio_get_value(N2100_POWER_BUTTON) == 0) {
311 ctrl_alt_del();
312 return;
313 }
314
315 power_button_poll_timer.expires = jiffies + (HZ / 10);
316 add_timer(&power_button_poll_timer);
317 }
318
n2100_request_gpios(void)319 static int __init n2100_request_gpios(void)
320 {
321 int ret;
322
323 if (!machine_is_n2100())
324 return 0;
325
326 ret = gpio_request(N2100_HARDWARE_RESET, "reset");
327 if (ret)
328 pr_err("could not request reset GPIO\n");
329
330 ret = gpio_request(N2100_POWER_BUTTON, "power");
331 if (ret)
332 pr_err("could not request power GPIO\n");
333 else {
334 ret = gpio_direction_input(N2100_POWER_BUTTON);
335 if (ret)
336 pr_err("could not set power GPIO as input\n");
337 }
338 /* Set up power button poll timer */
339 timer_setup(&power_button_poll_timer, power_button_poll, 0);
340 power_button_poll_timer.expires = jiffies + (HZ / 10);
341 add_timer(&power_button_poll_timer);
342 return 0;
343 }
344 device_initcall(n2100_request_gpios);
345
n2100_init_machine(void)346 static void __init n2100_init_machine(void)
347 {
348 register_iop32x_gpio();
349 platform_device_register(&iop3xx_i2c0_device);
350 platform_device_register(&n2100_flash_device);
351 platform_device_register(&n2100_serial_device);
352 platform_device_register(&iop3xx_dma_0_channel);
353 platform_device_register(&iop3xx_dma_1_channel);
354
355 i2c_register_board_info(0, n2100_i2c_devices,
356 ARRAY_SIZE(n2100_i2c_devices));
357
358 pm_power_off = n2100_power_off;
359 }
360
361 MACHINE_START(N2100, "Thecus N2100")
362 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
363 .atag_offset = 0x100,
364 .map_io = n2100_map_io,
365 .init_irq = iop32x_init_irq,
366 .init_time = n2100_timer_init,
367 .init_machine = n2100_init_machine,
368 .restart = n2100_restart,
369 MACHINE_END
370
