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 */
49static 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 */
59static 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
68void __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 */
78static int __init
79n2100_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
114static 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 */
127static 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}
134DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
135
136static int __init n2100_pci_init(void)
137{
138	if (machine_is_n2100())
139		pci_common_init(&n2100_pci);
140
141	return 0;
142}
143
144subsys_initcall(n2100_pci_init);
145
146
147/*
148 * N2100 machine initialisation.
149 */
150static struct physmap_flash_data n2100_flash_data = {
151	.width		= 2,
152};
153
154static struct resource n2100_flash_resource = {
155	.start		= 0xf0000000,
156	.end		= 0xf0ffffff,
157	.flags		= IORESOURCE_MEM,
158};
159
160static 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
171static 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
184static struct resource n2100_uart_resource = {
185	.start		= N2100_UART,
186	.end		= N2100_UART + 7,
187	.flags		= IORESOURCE_MEM,
188};
189
190static 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
200static struct f75375s_platform_data n2100_f75375s = {
201	.pwm		= { 255, 255 },
202	.pwm_enable = { 0, 0 },
203};
204
205static 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
252static 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 */
269static 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
291static 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
306static struct timer_list power_button_poll_timer;
307
308static void power_button_poll(unsigned long dummy)
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
319static 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	init_timer(&power_button_poll_timer);
340	power_button_poll_timer.function = power_button_poll;
341	power_button_poll_timer.expires = jiffies + (HZ / 10);
342	add_timer(&power_button_poll_timer);
343	return 0;
344}
345device_initcall(n2100_request_gpios);
346
347static void __init n2100_init_machine(void)
348{
349	register_iop32x_gpio();
350	platform_device_register(&iop3xx_i2c0_device);
351	platform_device_register(&n2100_flash_device);
352	platform_device_register(&n2100_serial_device);
353	platform_device_register(&iop3xx_dma_0_channel);
354	platform_device_register(&iop3xx_dma_1_channel);
355
356	i2c_register_board_info(0, n2100_i2c_devices,
357		ARRAY_SIZE(n2100_i2c_devices));
358
359	pm_power_off = n2100_power_off;
360}
361
362MACHINE_START(N2100, "Thecus N2100")
363	/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
364	.atag_offset	= 0x100,
365	.map_io		= n2100_map_io,
366	.init_irq	= iop32x_init_irq,
367	.init_time	= n2100_timer_init,
368	.init_machine	= n2100_init_machine,
369	.restart	= n2100_restart,
370MACHINE_END
371