1 /*
2 * arch/arm/mach-ks8695/board-acs5k.c
3 *
4 * Brivo Systems LLC, ACS-5000 Master Board
5 *
6 * Copyright 2008 Simtec Electronics
7 * Daniel Silverstone <dsilvers@simtec.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13 #include <linux/gpio.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/interrupt.h>
17 #include <linux/init.h>
18 #include <linux/platform_device.h>
19
20 #include <linux/i2c.h>
21 #include <linux/i2c-algo-bit.h>
22 #include <linux/i2c-gpio.h>
23 #include <linux/platform_data/pca953x.h>
24
25 #include <linux/mtd/mtd.h>
26 #include <linux/mtd/map.h>
27 #include <linux/mtd/physmap.h>
28 #include <linux/mtd/partitions.h>
29
30 #include <asm/mach-types.h>
31
32 #include <asm/mach/arch.h>
33 #include <asm/mach/map.h>
34 #include <asm/mach/irq.h>
35
36 #include <mach/devices.h>
37 #include <mach/gpio-ks8695.h>
38
39 #include "generic.h"
40
41 static struct i2c_gpio_platform_data acs5k_i2c_device_platdata = {
42 .sda_pin = 4,
43 .scl_pin = 5,
44 .udelay = 10,
45 };
46
47 static struct platform_device acs5k_i2c_device = {
48 .name = "i2c-gpio",
49 .id = -1,
50 .num_resources = 0,
51 .resource = NULL,
52 .dev = {
53 .platform_data = &acs5k_i2c_device_platdata,
54 },
55 };
56
acs5k_pca9555_setup(struct i2c_client * client,unsigned gpio_base,unsigned ngpio,void * context)57 static int acs5k_pca9555_setup(struct i2c_client *client,
58 unsigned gpio_base, unsigned ngpio,
59 void *context)
60 {
61 static int acs5k_gpio_value[] = {
62 -1, -1, -1, -1, -1, -1, -1, 0, 1, 1, -1, 0, 1, 0, -1, -1
63 };
64 int n;
65
66 for (n = 0; n < ARRAY_SIZE(acs5k_gpio_value); ++n) {
67 gpio_request(gpio_base + n, "ACS-5000 GPIO Expander");
68 if (acs5k_gpio_value[n] < 0)
69 gpio_direction_input(gpio_base + n);
70 else
71 gpio_direction_output(gpio_base + n,
72 acs5k_gpio_value[n]);
73 gpio_export(gpio_base + n, 0); /* Export, direction locked down */
74 }
75
76 return 0;
77 }
78
79 static struct pca953x_platform_data acs5k_i2c_pca9555_platdata = {
80 .gpio_base = 16, /* Start directly after the CPU's GPIO */
81 .invert = 0, /* Do not invert */
82 .setup = acs5k_pca9555_setup,
83 };
84
85 static struct i2c_board_info acs5k_i2c_devs[] __initdata = {
86 {
87 I2C_BOARD_INFO("pcf8563", 0x51),
88 },
89 {
90 I2C_BOARD_INFO("pca9555", 0x20),
91 .platform_data = &acs5k_i2c_pca9555_platdata,
92 },
93 };
94
acs5k_i2c_init(void)95 static void acs5k_i2c_init(void)
96 {
97 /* The gpio interface */
98 platform_device_register(&acs5k_i2c_device);
99 /* I2C devices */
100 i2c_register_board_info(0, acs5k_i2c_devs,
101 ARRAY_SIZE(acs5k_i2c_devs));
102 }
103
104 static struct mtd_partition acs5k_nor_partitions[] = {
105 [0] = {
106 .name = "Boot Agent and config",
107 .size = SZ_256K,
108 .offset = 0,
109 .mask_flags = MTD_WRITEABLE,
110 },
111 [1] = {
112 .name = "Kernel",
113 .size = SZ_1M,
114 .offset = SZ_256K,
115 },
116 [2] = {
117 .name = "SquashFS1",
118 .size = SZ_2M,
119 .offset = SZ_256K + SZ_1M,
120 },
121 [3] = {
122 .name = "SquashFS2",
123 .size = SZ_4M + SZ_2M,
124 .offset = SZ_256K + SZ_1M + SZ_2M,
125 },
126 [4] = {
127 .name = "Data",
128 .size = SZ_16M + SZ_4M + SZ_2M + SZ_512K, /* 22.5 MB */
129 .offset = SZ_256K + SZ_8M + SZ_1M,
130 }
131 };
132
133 static struct physmap_flash_data acs5k_nor_pdata = {
134 .width = 4,
135 .nr_parts = ARRAY_SIZE(acs5k_nor_partitions),
136 .parts = acs5k_nor_partitions,
137 };
138
139 static struct resource acs5k_nor_resource[] = {
140 [0] = {
141 .start = SZ_32M, /* We expect the bootloader to map
142 * the flash here.
143 */
144 .end = SZ_32M + SZ_16M - 1,
145 .flags = IORESOURCE_MEM,
146 },
147 [1] = {
148 .start = SZ_32M + SZ_16M,
149 .end = SZ_32M + SZ_32M - SZ_256K - 1,
150 .flags = IORESOURCE_MEM,
151 }
152 };
153
154 static struct platform_device acs5k_device_nor = {
155 .name = "physmap-flash",
156 .id = -1,
157 .num_resources = ARRAY_SIZE(acs5k_nor_resource),
158 .resource = acs5k_nor_resource,
159 .dev = {
160 .platform_data = &acs5k_nor_pdata,
161 },
162 };
163
acs5k_register_nor(void)164 static void __init acs5k_register_nor(void)
165 {
166 int ret;
167
168 if (acs5k_nor_partitions[0].mask_flags == 0)
169 printk(KERN_WARNING "Warning: Unprotecting bootloader and configuration partition\n");
170
171 ret = platform_device_register(&acs5k_device_nor);
172 if (ret < 0)
173 printk(KERN_ERR "failed to register physmap-flash device\n");
174 }
175
acs5k_protection_setup(char * s)176 static int __init acs5k_protection_setup(char *s)
177 {
178 /* We can't allocate anything here but we should be able
179 * to trivially parse s and decide if we can protect the
180 * bootloader partition or not
181 */
182 if (strcmp(s, "no") == 0)
183 acs5k_nor_partitions[0].mask_flags = 0;
184
185 return 1;
186 }
187
188 __setup("protect_bootloader=", acs5k_protection_setup);
189
acs5k_init_gpio(void)190 static void __init acs5k_init_gpio(void)
191 {
192 int i;
193
194 ks8695_register_gpios();
195 for (i = 0; i < 4; ++i)
196 gpio_request(i, "ACS5K IRQ");
197 gpio_request(7, "ACS5K KS_FRDY");
198 for (i = 8; i < 16; ++i)
199 gpio_request(i, "ACS5K Unused");
200
201 gpio_request(3, "ACS5K CAN Control");
202 gpio_request(6, "ACS5K Heartbeat");
203 gpio_direction_output(3, 1); /* Default CAN_RESET high */
204 gpio_direction_output(6, 0); /* Default KS8695_ACTIVE low */
205 gpio_export(3, 0); /* export CAN_RESET as output only */
206 gpio_export(6, 0); /* export KS8695_ACTIVE as output only */
207 }
208
acs5k_init(void)209 static void __init acs5k_init(void)
210 {
211 acs5k_init_gpio();
212
213 /* Network device */
214 ks8695_add_device_lan(); /* eth0 = LAN */
215 ks8695_add_device_wan(); /* ethX = WAN */
216
217 /* NOR devices */
218 acs5k_register_nor();
219
220 /* I2C bus */
221 acs5k_i2c_init();
222 }
223
224 MACHINE_START(ACS5K, "Brivo Systems LLC ACS-5000 Master board")
225 /* Maintainer: Simtec Electronics. */
226 .atag_offset = 0x100,
227 .map_io = ks8695_map_io,
228 .init_irq = ks8695_init_irq,
229 .init_machine = acs5k_init,
230 .init_time = ks8695_timer_init,
231 .restart = ks8695_restart,
232 MACHINE_END
233