summaryrefslogtreecommitdiff
path: root/arch/arm/mach-ks8695/board-acs5k.c
blob: a5fcc7c7fe185e753b44056fb13f58a23b0fc4da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/*
 * arch/arm/mach-ks8695/board-acs5k.c
 *
 * Brivo Systems LLC, ACS-5000 Master Board
 *
 * Copyright 2008 Simtec Electronics
 *		  Daniel Silverstone <dsilvers@simtec.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/platform_device.h>

#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c-gpio.h>
#include <linux/i2c/pca953x.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/partitions.h>

#include <asm/mach-types.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/devices.h>
#include <mach/gpio.h>

#include "generic.h"

static struct i2c_gpio_platform_data acs5k_i2c_device_platdata = {
	.sda_pin	= 4,
	.scl_pin	= 5,
	.udelay		= 10,
};

static struct platform_device acs5k_i2c_device = {
	.name		= "i2c-gpio",
	.id		= -1,
	.num_resources	= 0,
	.resource	= NULL,
	.dev		= {
		.platform_data	= &acs5k_i2c_device_platdata,
	},
};

static int acs5k_pca9555_setup(struct i2c_client *client,
			       unsigned gpio_base, unsigned ngpio,
			       void *context)
{
	static int acs5k_gpio_value[] = {
		-1, -1, -1, -1, -1, -1, -1, 0, 1, 1, -1, 0, 1, 0, -1, -1
	};
	int n;

	for (n = 0; n < ARRAY_SIZE(acs5k_gpio_value); ++n) {
		gpio_request(gpio_base + n, "ACS-5000 GPIO Expander");
		if (acs5k_gpio_value[n] < 0)
			gpio_direction_input(gpio_base + n);
		else
			gpio_direction_output(gpio_base + n,
					      acs5k_gpio_value[n]);
		gpio_export(gpio_base + n, 0); /* Export, direction locked down */
	}

	return 0;
}

static struct pca953x_platform_data acs5k_i2c_pca9555_platdata = {
	.gpio_base	= 16, /* Start directly after the CPU's GPIO */
	.invert		= 0, /* Do not invert */
	.setup		= acs5k_pca9555_setup,
};

static struct i2c_board_info acs5k_i2c_devs[] __initdata = {
	{
		I2C_BOARD_INFO("pcf8563", 0x51),
	},
	{
		I2C_BOARD_INFO("pca9555", 0x20),
		.platform_data = &acs5k_i2c_pca9555_platdata,
	},
};

static void __devinit acs5k_i2c_init(void)
{
	/* The gpio interface */
	platform_device_register(&acs5k_i2c_device);
	/* I2C devices */
	i2c_register_board_info(0, acs5k_i2c_devs,
				ARRAY_SIZE(acs5k_i2c_devs));
}

static struct mtd_partition acs5k_nor_partitions[] = {
	[0] = {
		.name	= "Boot Agent and config",
		.size	= SZ_256K,
		.offset	= 0,
		.mask_flags = MTD_WRITEABLE,
	},
	[1] = {
		.name	= "Kernel",
		.size	= SZ_1M,
		.offset	= SZ_256K,
	},
	[2] = {
		.name	= "SquashFS1",
		.size	= SZ_2M,
		.offset	= SZ_256K + SZ_1M,
	},
	[3] = {
		.name	= "SquashFS2",
		.size	= SZ_4M + SZ_2M,
		.offset	= SZ_256K + SZ_1M + SZ_2M,
	},
	[4] = {
		.name	= "Data",
		.size	= SZ_16M + SZ_4M + SZ_2M + SZ_512K, /* 22.5 MB */
		.offset	= SZ_256K + SZ_8M + SZ_1M,
	}
};

static struct physmap_flash_data acs5k_nor_pdata = {
	.width		= 4,
	.nr_parts	= ARRAY_SIZE(acs5k_nor_partitions),
	.parts		= acs5k_nor_partitions,
};

static struct resource acs5k_nor_resource[] = {
	[0] = {
		.start = SZ_32M, /* We expect the bootloader to map
				  * the flash here.
				  */
		.end   = SZ_32M + SZ_16M - 1,
		.flags = IORESOURCE_MEM,
	},
	[1] = {
		.start = SZ_32M + SZ_16M,
		.end   = SZ_32M + SZ_32M - SZ_256K - 1,
		.flags = IORESOURCE_MEM,
	}
};

static struct platform_device acs5k_device_nor = {
	.name		= "physmap-flash",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(acs5k_nor_resource),
	.resource	= acs5k_nor_resource,
	.dev		= {
		.platform_data = &acs5k_nor_pdata,
	},
};

static void __init acs5k_register_nor(void)
{
	int ret;

	if (acs5k_nor_partitions[0].mask_flags == 0)
		printk(KERN_WARNING "Warning: Unprotecting bootloader and configuration partition\n");

	ret = platform_device_register(&acs5k_device_nor);
	if (ret < 0)
		printk(KERN_ERR "failed to register physmap-flash device\n");
}

static int __init acs5k_protection_setup(char *s)
{
	/* We can't allocate anything here but we should be able
	 * to trivially parse s and decide if we can protect the
	 * bootloader partition or not
	 */
	if (strcmp(s, "no") == 0)
		acs5k_nor_partitions[0].mask_flags = 0;

	return 1;
}

__setup("protect_bootloader=", acs5k_protection_setup);

static void __init acs5k_init_gpio(void)
{
	int i;

	ks8695_register_gpios();
	for (i = 0; i < 4; ++i)
		gpio_request(i, "ACS5K IRQ");
	gpio_request(7, "ACS5K KS_FRDY");
	for (i = 8; i < 16; ++i)
		gpio_request(i, "ACS5K Unused");

	gpio_request(3, "ACS5K CAN Control");
	gpio_request(6, "ACS5K Heartbeat");
	gpio_direction_output(3, 1); /* Default CAN_RESET high */
	gpio_direction_output(6, 0); /* Default KS8695_ACTIVE low */
	gpio_export(3, 0); /* export CAN_RESET as output only */
	gpio_export(6, 0); /* export KS8695_ACTIVE as output only */
}

static void __init acs5k_init(void)
{
	acs5k_init_gpio();

	/* Network device */
	ks8695_add_device_lan();	/* eth0 = LAN */
	ks8695_add_device_wan();	/* ethX = WAN */

	/* NOR devices */
	acs5k_register_nor();

	/* I2C bus */
	acs5k_i2c_init();
}

MACHINE_START(ACS5K, "Brivo Systems LLC ACS-5000 Master board")
	/* Maintainer: Simtec Electronics. */
	.atag_offset	= 0x100,
	.map_io		= ks8695_map_io,
	.init_irq	= ks8695_init_irq,
	.init_machine	= acs5k_init,
	.timer		= &ks8695_timer,
MACHINE_END