1/*
  2 * GPR board platform device registration (Au1550)
  3 *
  4 * Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
  5 *
  6 * This program is free software; you can redistribute it and/or modify
  7 * it under the terms of the GNU General Public License as published by
  8 * the Free Software Foundation; either version 2 of the License, or
  9 * (at your option) any later version.
 10 *
 11 * This program is distributed in the hope that it will be useful,
 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14 * GNU General Public License for more details.
 15 *
 16 * You should have received a copy of the GNU General Public License
 17 * along with this program; if not, write to the Free Software
 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 19 */
 20
 21#include <linux/delay.h>
 22#include <linux/init.h>
 23#include <linux/interrupt.h>
 24#include <linux/kernel.h>
 25#include <linux/platform_device.h>
 26#include <linux/pm.h>
 27#include <linux/mtd/partitions.h>
 28#include <linux/mtd/physmap.h>
 29#include <linux/leds.h>
 30#include <linux/gpio.h>
 31#include <linux/i2c.h>
 32#include <linux/i2c-gpio.h>
 33#include <asm/bootinfo.h>
 34#include <asm/idle.h>
 35#include <asm/reboot.h>
 36#include <asm/mach-au1x00/au1000.h>
 37#include <asm/mach-au1x00/gpio-au1000.h>
 38#include <prom.h>
 39
 40const char *get_system_type(void)
 41{
 42	return "GPR";
 43}
 44
 45void __init prom_init(void)
 46{
 47	unsigned char *memsize_str;
 48	unsigned long memsize;
 49
 50	prom_argc = fw_arg0;
 51	prom_argv = (char **)fw_arg1;
 52	prom_envp = (char **)fw_arg2;
 53
 54	prom_init_cmdline();
 55
 56	memsize_str = prom_getenv("memsize");
 57	if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
 58		memsize = 0x04000000;
 59	add_memory_region(0, memsize, BOOT_MEM_RAM);
 60}
 61
 62void prom_putchar(unsigned char c)
 63{
 64	alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
 65}
 66
 67static void gpr_reset(char *c)
 68{
 69	/* switch System-LED to orange (red# and green# on) */
 70	alchemy_gpio_direction_output(4, 0);
 71	alchemy_gpio_direction_output(5, 0);
 72
 73	/* trigger watchdog to reset board in 200ms */
 74	printk(KERN_EMERG "Triggering watchdog soft reset...\n");
 75	raw_local_irq_disable();
 76	alchemy_gpio_direction_output(1, 0);
 77	udelay(1);
 78	alchemy_gpio_set_value(1, 1);
 79	while (1)
 80		cpu_wait();
 81}
 82
 83static void gpr_power_off(void)
 84{
 85	while (1)
 86		cpu_wait();
 87}
 88
 89void __init board_setup(void)
 90{
 91	printk(KERN_INFO "Trapeze ITS GPR board\n");
 92
 93	pm_power_off = gpr_power_off;
 94	_machine_halt = gpr_power_off;
 95	_machine_restart = gpr_reset;
 96
 97	/* Enable UART1/3 */
 98	alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
 99	alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
100
101	/* Take away Reset of UMTS-card */
102	alchemy_gpio_direction_output(215, 1);
103}
104
105/*
106 * Watchdog
107 */
108static struct resource gpr_wdt_resource[] = {
109	[0] = {
110		.start	= 1,
111		.end	= 1,
112		.name	= "gpr-adm6320-wdt",
113		.flags	= IORESOURCE_IRQ,
114	}
115};
116
117static struct platform_device gpr_wdt_device = {
118	.name = "adm6320-wdt",
119	.id = 0,
120	.num_resources = ARRAY_SIZE(gpr_wdt_resource),
121	.resource = gpr_wdt_resource,
122};
123
124/*
125 * FLASH
126 *
127 * 0x00000000-0x00200000 : "kernel"
128 * 0x00200000-0x00a00000 : "rootfs"
129 * 0x01d00000-0x01f00000 : "config"
130 * 0x01c00000-0x01d00000 : "yamon"
131 * 0x01d00000-0x01d40000 : "yamon env vars"
132 * 0x00000000-0x00a00000 : "kernel+rootfs"
133 */
134static struct mtd_partition gpr_mtd_partitions[] = {
135	{
136		.name	= "kernel",
137		.size	= 0x00200000,
138		.offset = 0,
139	},
140	{
141		.name	= "rootfs",
142		.size	= 0x00800000,
143		.offset = MTDPART_OFS_APPEND,
144		.mask_flags = MTD_WRITEABLE,
145	},
146	{
147		.name	= "config",
148		.size	= 0x00200000,
149		.offset = 0x01d00000,
150	},
151	{
152		.name	= "yamon",
153		.size	= 0x00100000,
154		.offset = 0x01c00000,
155	},
156	{
157		.name	= "yamon env vars",
158		.size	= 0x00040000,
159		.offset = MTDPART_OFS_APPEND,
160	},
161	{
162		.name	= "kernel+rootfs",
163		.size	= 0x00a00000,
164		.offset = 0,
165	},
166};
167
168static struct physmap_flash_data gpr_flash_data = {
169	.width		= 4,
170	.nr_parts	= ARRAY_SIZE(gpr_mtd_partitions),
171	.parts		= gpr_mtd_partitions,
172};
173
174static struct resource gpr_mtd_resource = {
175	.start	= 0x1e000000,
176	.end	= 0x1fffffff,
177	.flags	= IORESOURCE_MEM,
178};
179
180static struct platform_device gpr_mtd_device = {
181	.name		= "physmap-flash",
182	.dev		= {
183		.platform_data	= &gpr_flash_data,
184	},
185	.num_resources	= 1,
186	.resource	= &gpr_mtd_resource,
187};
188
189/*
190 * LEDs
191 */
192static struct gpio_led gpr_gpio_leds[] = {
193	{	/* green */
194		.name			= "gpr:green",
195		.gpio			= 4,
196		.active_low		= 1,
197	},
198	{	/* red */
199		.name			= "gpr:red",
200		.gpio			= 5,
201		.active_low		= 1,
202	}
203};
204
205static struct gpio_led_platform_data gpr_led_data = {
206	.num_leds = ARRAY_SIZE(gpr_gpio_leds),
207	.leds = gpr_gpio_leds,
208};
209
210static struct platform_device gpr_led_devices = {
211	.name = "leds-gpio",
212	.id = -1,
213	.dev = {
214		.platform_data = &gpr_led_data,
215	}
216};
217
218/*
219 * I2C
220 */
221static struct i2c_gpio_platform_data gpr_i2c_data = {
222	.sda_pin		= 209,
223	.sda_is_open_drain	= 1,
224	.scl_pin		= 210,
225	.scl_is_open_drain	= 1,
226	.udelay			= 2,		/* ~100 kHz */
227	.timeout		= HZ,
228};
229
230static struct platform_device gpr_i2c_device = {
231	.name			= "i2c-gpio",
232	.id			= -1,
233	.dev.platform_data	= &gpr_i2c_data,
234};
235
236static struct i2c_board_info gpr_i2c_info[] __initdata = {
237	{
238		I2C_BOARD_INFO("lm83", 0x18),
239		.type = "lm83"
240	}
241};
242
243
244
245static struct resource alchemy_pci_host_res[] = {
246	[0] = {
247		.start	= AU1500_PCI_PHYS_ADDR,
248		.end	= AU1500_PCI_PHYS_ADDR + 0xfff,
249		.flags	= IORESOURCE_MEM,
250	},
251};
252
253static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
254{
255	if ((slot == 0) && (pin == 1))
256		return AU1550_PCI_INTA;
257	else if ((slot == 0) && (pin == 2))
258		return AU1550_PCI_INTB;
259
260	return 0xff;
261}
262
263static struct alchemy_pci_platdata gpr_pci_pd = {
264	.board_map_irq	= gpr_map_pci_irq,
265	.pci_cfg_set	= PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
266			  PCI_CONFIG_CH |
267#if defined(__MIPSEB__)
268			  PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
269#else
270			  0,
271#endif
272};
273
274static struct platform_device gpr_pci_host_dev = {
275	.dev.platform_data = &gpr_pci_pd,
276	.name		= "alchemy-pci",
277	.id		= 0,
278	.num_resources	= ARRAY_SIZE(alchemy_pci_host_res),
279	.resource	= alchemy_pci_host_res,
280};
281
282static struct platform_device *gpr_devices[] __initdata = {
283	&gpr_wdt_device,
284	&gpr_mtd_device,
285	&gpr_i2c_device,
286	&gpr_led_devices,
287};
288
289static int __init gpr_pci_init(void)
290{
291	return platform_device_register(&gpr_pci_host_dev);
292}
293/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
294arch_initcall(gpr_pci_init);
295
296
297static int __init gpr_dev_init(void)
298{
299	i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
300
301	return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
302}
303device_initcall(gpr_dev_init);