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e38d92fd KH |
1 | /* |
2 | * TI DaVinci DM646X EVM board | |
3 | * | |
4 | * Derived from: arch/arm/mach-davinci/board-evm.c | |
5 | * Copyright (C) 2006 Texas Instruments. | |
6 | * | |
7 | * (C) 2007-2008, MontaVista Software, Inc. | |
8 | * | |
9 | * This file is licensed under the terms of the GNU General Public License | |
10 | * version 2. This program is licensed "as is" without any warranty of any | |
11 | * kind, whether express or implied. | |
12 | * | |
13 | */ | |
14 | ||
15 | /************************************************************************** | |
16 | * Included Files | |
17 | **************************************************************************/ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/major.h> | |
24 | #include <linux/root_dev.h> | |
25 | #include <linux/dma-mapping.h> | |
26 | #include <linux/serial.h> | |
27 | #include <linux/serial_8250.h> | |
28 | #include <linux/leds.h> | |
29 | #include <linux/gpio.h> | |
30 | #include <linux/io.h> | |
31 | #include <linux/platform_device.h> | |
32 | #include <linux/i2c.h> | |
33 | #include <linux/i2c/at24.h> | |
34 | #include <linux/i2c/pcf857x.h> | |
35 | #include <linux/etherdevice.h> | |
36 | ||
37 | #include <asm/setup.h> | |
38 | #include <asm/mach-types.h> | |
39 | #include <asm/mach/arch.h> | |
40 | #include <asm/mach/map.h> | |
41 | #include <asm/mach/flash.h> | |
42 | ||
43 | #include <mach/dm646x.h> | |
44 | #include <mach/common.h> | |
45 | #include <mach/psc.h> | |
46 | #include <mach/serial.h> | |
47 | #include <mach/i2c.h> | |
ac7b75b5 KH |
48 | #include <mach/mmc.h> |
49 | #include <mach/emac.h> | |
50 | ||
51 | #define DM646X_EVM_PHY_MASK (0x2) | |
52 | #define DM646X_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */ | |
53 | ||
e38d92fd KH |
54 | static struct davinci_uart_config uart_config __initdata = { |
55 | .enabled_uarts = (1 << 0), | |
56 | }; | |
57 | ||
58 | /* LEDS */ | |
59 | ||
60 | static struct gpio_led evm_leds[] = { | |
61 | { .name = "DS1", .active_low = 1, }, | |
62 | { .name = "DS2", .active_low = 1, }, | |
63 | { .name = "DS3", .active_low = 1, }, | |
64 | { .name = "DS4", .active_low = 1, }, | |
65 | }; | |
66 | ||
67 | static __initconst struct gpio_led_platform_data evm_led_data = { | |
68 | .num_leds = ARRAY_SIZE(evm_leds), | |
69 | .leds = evm_leds, | |
70 | }; | |
71 | ||
72 | static struct platform_device *evm_led_dev; | |
73 | ||
74 | static int evm_led_setup(struct i2c_client *client, int gpio, | |
75 | unsigned int ngpio, void *c) | |
76 | { | |
77 | struct gpio_led *leds = evm_leds; | |
78 | int status; | |
79 | ||
80 | while (ngpio--) { | |
81 | leds->gpio = gpio++; | |
82 | leds++; | |
83 | }; | |
84 | ||
85 | evm_led_dev = platform_device_alloc("leds-gpio", 0); | |
86 | platform_device_add_data(evm_led_dev, &evm_led_data, | |
87 | sizeof(evm_led_data)); | |
88 | ||
89 | evm_led_dev->dev.parent = &client->dev; | |
90 | status = platform_device_add(evm_led_dev); | |
91 | if (status < 0) { | |
92 | platform_device_put(evm_led_dev); | |
93 | evm_led_dev = NULL; | |
94 | } | |
95 | return status; | |
96 | } | |
97 | ||
98 | static int evm_led_teardown(struct i2c_client *client, int gpio, | |
99 | unsigned ngpio, void *c) | |
100 | { | |
101 | if (evm_led_dev) { | |
102 | platform_device_unregister(evm_led_dev); | |
103 | evm_led_dev = NULL; | |
104 | } | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int evm_sw_gpio[4] = { -EINVAL, -EINVAL, -EINVAL, -EINVAL }; | |
109 | ||
110 | static int evm_sw_setup(struct i2c_client *client, int gpio, | |
111 | unsigned ngpio, void *c) | |
112 | { | |
113 | int status; | |
114 | int i; | |
115 | char label[10]; | |
116 | ||
117 | for (i = 0; i < 4; ++i) { | |
118 | snprintf(label, 10, "user_sw%d", i); | |
119 | status = gpio_request(gpio, label); | |
120 | if (status) | |
121 | goto out_free; | |
122 | evm_sw_gpio[i] = gpio++; | |
123 | ||
124 | status = gpio_direction_input(evm_sw_gpio[i]); | |
125 | if (status) { | |
126 | gpio_free(evm_sw_gpio[i]); | |
127 | evm_sw_gpio[i] = -EINVAL; | |
128 | goto out_free; | |
129 | } | |
130 | ||
131 | status = gpio_export(evm_sw_gpio[i], 0); | |
132 | if (status) { | |
133 | gpio_free(evm_sw_gpio[i]); | |
134 | evm_sw_gpio[i] = -EINVAL; | |
135 | goto out_free; | |
136 | } | |
137 | } | |
138 | return status; | |
139 | out_free: | |
140 | for (i = 0; i < 4; ++i) { | |
141 | if (evm_sw_gpio[i] != -EINVAL) { | |
142 | gpio_free(evm_sw_gpio[i]); | |
143 | evm_sw_gpio[i] = -EINVAL; | |
144 | } | |
145 | } | |
146 | return status; | |
147 | } | |
148 | ||
149 | static int evm_sw_teardown(struct i2c_client *client, int gpio, | |
150 | unsigned ngpio, void *c) | |
151 | { | |
152 | int i; | |
153 | ||
154 | for (i = 0; i < 4; ++i) { | |
155 | if (evm_sw_gpio[i] != -EINVAL) { | |
156 | gpio_unexport(evm_sw_gpio[i]); | |
157 | gpio_free(evm_sw_gpio[i]); | |
158 | evm_sw_gpio[i] = -EINVAL; | |
159 | } | |
160 | } | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int evm_pcf_setup(struct i2c_client *client, int gpio, | |
165 | unsigned int ngpio, void *c) | |
166 | { | |
167 | int status; | |
168 | ||
169 | if (ngpio < 8) | |
170 | return -EINVAL; | |
171 | ||
172 | status = evm_sw_setup(client, gpio, 4, c); | |
173 | if (status) | |
174 | return status; | |
175 | ||
176 | return evm_led_setup(client, gpio+4, 4, c); | |
177 | } | |
178 | ||
179 | static int evm_pcf_teardown(struct i2c_client *client, int gpio, | |
180 | unsigned int ngpio, void *c) | |
181 | { | |
182 | BUG_ON(ngpio < 8); | |
183 | ||
184 | evm_sw_teardown(client, gpio, 4, c); | |
185 | evm_led_teardown(client, gpio+4, 4, c); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static struct pcf857x_platform_data pcf_data = { | |
191 | .gpio_base = DAVINCI_N_GPIO+1, | |
192 | .setup = evm_pcf_setup, | |
193 | .teardown = evm_pcf_teardown, | |
194 | }; | |
195 | ||
196 | /* Most of this EEPROM is unused, but U-Boot uses some data: | |
197 | * - 0x7f00, 6 bytes Ethernet Address | |
198 | * - ... newer boards may have more | |
199 | */ | |
e38d92fd KH |
200 | |
201 | static struct at24_platform_data eeprom_info = { | |
202 | .byte_len = (256*1024) / 8, | |
203 | .page_size = 64, | |
204 | .flags = AT24_FLAG_ADDR16, | |
b14dc0f9 MG |
205 | .setup = davinci_get_mac_addr, |
206 | .context = (void *)0x7f00, | |
e38d92fd KH |
207 | }; |
208 | ||
e38d92fd KH |
209 | static struct i2c_board_info __initdata i2c_info[] = { |
210 | { | |
211 | I2C_BOARD_INFO("24c256", 0x50), | |
212 | .platform_data = &eeprom_info, | |
213 | }, | |
214 | { | |
215 | I2C_BOARD_INFO("pcf8574a", 0x38), | |
216 | .platform_data = &pcf_data, | |
217 | }, | |
218 | }; | |
219 | ||
220 | static struct davinci_i2c_platform_data i2c_pdata = { | |
221 | .bus_freq = 100 /* kHz */, | |
222 | .bus_delay = 0 /* usec */, | |
223 | }; | |
224 | ||
225 | static void __init evm_init_i2c(void) | |
226 | { | |
227 | davinci_init_i2c(&i2c_pdata); | |
228 | i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info)); | |
229 | } | |
230 | ||
231 | static void __init davinci_map_io(void) | |
232 | { | |
e38d92fd KH |
233 | dm646x_init(); |
234 | } | |
235 | ||
236 | static __init void evm_init(void) | |
237 | { | |
972412b6 MG |
238 | struct davinci_soc_info *soc_info = &davinci_soc_info; |
239 | ||
e38d92fd KH |
240 | evm_init_i2c(); |
241 | davinci_serial_init(&uart_config); | |
972412b6 MG |
242 | |
243 | soc_info->emac_pdata->phy_mask = DM646X_EVM_PHY_MASK; | |
244 | soc_info->emac_pdata->mdio_max_freq = DM646X_EVM_MDIO_FREQUENCY; | |
e38d92fd KH |
245 | } |
246 | ||
247 | static __init void davinci_dm646x_evm_irq_init(void) | |
248 | { | |
249 | davinci_irq_init(); | |
250 | } | |
251 | ||
252 | MACHINE_START(DAVINCI_DM6467_EVM, "DaVinci DM646x EVM") | |
253 | .phys_io = IO_PHYS, | |
254 | .io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc, | |
255 | .boot_params = (0x80000100), | |
256 | .map_io = davinci_map_io, | |
257 | .init_irq = davinci_dm646x_evm_irq_init, | |
258 | .timer = &davinci_timer, | |
259 | .init_machine = evm_init, | |
260 | MACHINE_END | |
261 |