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1 | /* |
2 | * Freescale STMP378X development board support |
3 | * |
4 | * Embedded Alley Solutions, Inc <source@embeddedalley.com> |
5 | * |
6 | * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. |
7 | * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. |
8 | */ |
9 | |
10 | /* |
11 | * The code contained herein is licensed under the GNU General Public |
12 | * License. You may obtain a copy of the GNU General Public License |
13 | * Version 2 or later at the following locations: |
14 | * |
15 | * http://www.opensource.org/licenses/gpl-license.html |
16 | * http://www.gnu.org/copyleft/gpl.html |
17 | */ |
18 | #include <linux/kernel.h> |
19 | #include <linux/init.h> |
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20 | #include <linux/io.h> |
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21 | #include <linux/platform_device.h> |
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22 | #include <linux/delay.h> |
23 | #include <linux/clk.h> |
24 | #include <linux/err.h> |
25 | #include <linux/spi/spi.h> |
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26 | |
27 | #include <asm/setup.h> |
28 | #include <asm/mach-types.h> |
29 | #include <asm/mach/arch.h> |
30 | |
31 | #include <mach/pins.h> |
32 | #include <mach/pinmux.h> |
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33 | #include <mach/platform.h> |
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34 | #include <mach/stmp3xxx.h> |
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35 | #include <mach/mmc.h> |
36 | #include <mach/gpmi.h> |
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37 | |
38 | #include "stmp378x.h" |
39 | |
40 | static struct platform_device *devices[] = { |
41 | &stmp3xxx_dbguart, |
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42 | &stmp3xxx_appuart, |
43 | &stmp3xxx_watchdog, |
44 | &stmp3xxx_touchscreen, |
45 | &stmp3xxx_rtc, |
46 | &stmp3xxx_keyboard, |
47 | &stmp3xxx_framebuffer, |
48 | &stmp3xxx_backlight, |
49 | &stmp3xxx_rotdec, |
50 | &stmp3xxx_persistent, |
51 | &stmp3xxx_dcp_bootstream, |
52 | &stmp3xxx_dcp, |
53 | &stmp3xxx_battery, |
54 | &stmp378x_pxp, |
55 | &stmp378x_i2c, |
56 | }; |
57 | |
58 | static struct pin_desc i2c_pins_desc[] = { |
59 | { PINID_I2C_SCL, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
60 | { PINID_I2C_SDA, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
61 | }; |
62 | |
63 | static struct pin_group i2c_pins = { |
64 | .pins = i2c_pins_desc, |
65 | .nr_pins = ARRAY_SIZE(i2c_pins_desc), |
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66 | }; |
67 | |
68 | static struct pin_desc dbguart_pins_0[] = { |
69 | { PINID_PWM0, PIN_FUN3, }, |
70 | { PINID_PWM1, PIN_FUN3, }, |
71 | }; |
72 | |
73 | static struct pin_group dbguart_pins[] = { |
74 | [0] = { |
75 | .pins = dbguart_pins_0, |
76 | .nr_pins = ARRAY_SIZE(dbguart_pins_0), |
77 | }, |
78 | }; |
79 | |
80 | static int dbguart_pins_control(int id, int request) |
81 | { |
82 | int r = 0; |
83 | |
84 | if (request) |
85 | r = stmp3xxx_request_pin_group(&dbguart_pins[id], "debug uart"); |
86 | else |
87 | stmp3xxx_release_pin_group(&dbguart_pins[id], "debug uart"); |
88 | return r; |
89 | } |
90 | |
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91 | static struct pin_desc appuart_pins_0[] = { |
92 | { PINID_AUART1_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
93 | { PINID_AUART1_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
94 | { PINID_AUART1_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
95 | { PINID_AUART1_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
96 | }; |
97 | |
98 | static struct pin_desc appuart_pins_1[] = { |
99 | #if 0 /* enable these when second appuart will be connected */ |
100 | { PINID_AUART2_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
101 | { PINID_AUART2_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
102 | { PINID_AUART2_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
103 | { PINID_AUART2_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, }, |
104 | #endif |
105 | }; |
106 | |
107 | static struct pin_desc mmc_pins_desc[] = { |
108 | { PINID_SSP1_DATA0, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 }, |
109 | { PINID_SSP1_DATA1, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 }, |
110 | { PINID_SSP1_DATA2, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 }, |
111 | { PINID_SSP1_DATA3, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 }, |
112 | { PINID_SSP1_CMD, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 }, |
113 | { PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 }, |
114 | { PINID_SSP1_DETECT, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 }, |
115 | }; |
116 | |
117 | static struct pin_group mmc_pins = { |
118 | .pins = mmc_pins_desc, |
119 | .nr_pins = ARRAY_SIZE(mmc_pins_desc), |
120 | }; |
121 | |
122 | static int stmp3xxxmmc_get_wp(void) |
123 | { |
124 | return gpio_get_value(PINID_PWM4); |
125 | } |
126 | |
127 | static int stmp3xxxmmc_hw_init_ssp1(void) |
128 | { |
129 | int ret; |
130 | |
131 | ret = stmp3xxx_request_pin_group(&mmc_pins, "mmc"); |
132 | if (ret) |
133 | goto out; |
134 | |
135 | /* Configure write protect GPIO pin */ |
136 | ret = gpio_request(PINID_PWM4, "mmc wp"); |
137 | if (ret) |
138 | goto out_wp; |
139 | |
140 | gpio_direction_input(PINID_PWM4); |
141 | |
142 | /* Configure POWER pin as gpio to drive power to MMC slot */ |
143 | ret = gpio_request(PINID_PWM3, "mmc power"); |
144 | if (ret) |
145 | goto out_power; |
146 | |
147 | gpio_direction_output(PINID_PWM3, 0); |
148 | mdelay(100); |
149 | |
150 | return 0; |
151 | |
152 | out_power: |
153 | gpio_free(PINID_PWM4); |
154 | out_wp: |
155 | stmp3xxx_release_pin_group(&mmc_pins, "mmc"); |
156 | out: |
157 | return ret; |
158 | } |
159 | |
160 | static void stmp3xxxmmc_hw_release_ssp1(void) |
161 | { |
162 | gpio_free(PINID_PWM3); |
163 | gpio_free(PINID_PWM4); |
164 | stmp3xxx_release_pin_group(&mmc_pins, "mmc"); |
165 | } |
166 | |
167 | static void stmp3xxxmmc_cmd_pullup_ssp1(int enable) |
168 | { |
169 | stmp3xxx_pin_pullup(PINID_SSP1_CMD, enable, "mmc"); |
170 | } |
171 | |
172 | static unsigned long |
173 | stmp3xxxmmc_setclock_ssp1(void __iomem *base, unsigned long hz) |
174 | { |
175 | struct clk *ssp, *parent; |
176 | char *p; |
177 | long r; |
178 | |
179 | ssp = clk_get(NULL, "ssp"); |
180 | |
181 | /* using SSP1, no timeout, clock rate 1 */ |
182 | writel(BF(2, SSP_TIMING_CLOCK_DIVIDE) | |
183 | BF(0xFFFF, SSP_TIMING_TIMEOUT), |
184 | base + HW_SSP_TIMING); |
185 | |
186 | p = (hz > 1000000) ? "io" : "osc_24M"; |
187 | parent = clk_get(NULL, p); |
188 | clk_set_parent(ssp, parent); |
189 | r = clk_set_rate(ssp, 2 * hz / 1000); |
190 | clk_put(parent); |
191 | clk_put(ssp); |
192 | |
193 | return hz; |
194 | } |
195 | |
196 | static struct stmp3xxxmmc_platform_data mmc_data = { |
197 | .hw_init = stmp3xxxmmc_hw_init_ssp1, |
198 | .hw_release = stmp3xxxmmc_hw_release_ssp1, |
199 | .get_wp = stmp3xxxmmc_get_wp, |
200 | .cmd_pullup = stmp3xxxmmc_cmd_pullup_ssp1, |
201 | .setclock = stmp3xxxmmc_setclock_ssp1, |
202 | }; |
203 | |
204 | |
205 | static struct pin_group appuart_pins[] = { |
206 | [0] = { |
207 | .pins = appuart_pins_0, |
208 | .nr_pins = ARRAY_SIZE(appuart_pins_0), |
209 | }, |
210 | [1] = { |
211 | .pins = appuart_pins_1, |
212 | .nr_pins = ARRAY_SIZE(appuart_pins_1), |
213 | }, |
214 | }; |
215 | |
216 | static struct pin_desc ssp1_pins_desc[] = { |
217 | { PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0, }, |
218 | { PINID_SSP1_CMD, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, }, |
219 | { PINID_SSP1_DATA0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, }, |
220 | { PINID_SSP1_DATA3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, }, |
221 | }; |
222 | |
223 | static struct pin_desc ssp2_pins_desc[] = { |
224 | { PINID_GPMI_WRN, PIN_FUN3, PIN_8MA, PIN_3_3V, 0, }, |
225 | { PINID_GPMI_RDY1, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, }, |
226 | { PINID_GPMI_D00, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, }, |
227 | { PINID_GPMI_D03, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, }, |
228 | }; |
229 | |
230 | static struct pin_group ssp1_pins = { |
231 | .pins = ssp1_pins_desc, |
232 | .nr_pins = ARRAY_SIZE(ssp1_pins_desc), |
233 | }; |
234 | |
235 | static struct pin_group ssp2_pins = { |
236 | .pins = ssp1_pins_desc, |
237 | .nr_pins = ARRAY_SIZE(ssp2_pins_desc), |
238 | }; |
239 | |
240 | static struct pin_desc gpmi_pins_desc[] = { |
241 | { PINID_GPMI_CE0N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
242 | { PINID_GPMI_CE1N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
243 | { PINID_GMPI_CE2N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
244 | { PINID_GPMI_CLE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
245 | { PINID_GPMI_ALE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
246 | { PINID_GPMI_WPN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 }, |
247 | { PINID_GPMI_RDY1, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
248 | { PINID_GPMI_D00, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
249 | { PINID_GPMI_D01, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
250 | { PINID_GPMI_D02, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
251 | { PINID_GPMI_D03, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
252 | { PINID_GPMI_D04, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
253 | { PINID_GPMI_D05, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
254 | { PINID_GPMI_D06, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
255 | { PINID_GPMI_D07, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
256 | { PINID_GPMI_RDY0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
257 | { PINID_GPMI_RDY2, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
258 | { PINID_GPMI_RDY3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 }, |
259 | { PINID_GPMI_WRN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 }, |
260 | { PINID_GPMI_RDN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 }, |
261 | }; |
262 | |
263 | static struct pin_group gpmi_pins = { |
264 | .pins = gpmi_pins_desc, |
265 | .nr_pins = ARRAY_SIZE(gpmi_pins_desc), |
266 | }; |
267 | |
268 | static struct mtd_partition gpmi_partitions[] = { |
269 | [0] = { |
270 | .name = "boot", |
271 | .size = 10 * SZ_1M, |
272 | .offset = 0, |
273 | }, |
274 | [1] = { |
275 | .name = "data", |
276 | .size = MTDPART_SIZ_FULL, |
277 | .offset = MTDPART_OFS_APPEND, |
278 | }, |
279 | }; |
280 | |
281 | static struct gpmi_platform_data gpmi_data = { |
282 | .pins = &gpmi_pins, |
283 | .nr_parts = ARRAY_SIZE(gpmi_partitions), |
284 | .parts = gpmi_partitions, |
285 | .part_types = { "cmdline", NULL }, |
286 | }; |
287 | |
288 | static struct spi_board_info spi_board_info[] __initdata = { |
289 | #if defined(CONFIG_ENC28J60) || defined(CONFIG_ENC28J60_MODULE) |
290 | { |
291 | .modalias = "enc28j60", |
292 | .max_speed_hz = 6 * 1000 * 1000, |
293 | .bus_num = 1, |
294 | .chip_select = 0, |
295 | .platform_data = NULL, |
296 | }, |
297 | #endif |
298 | }; |
299 | |
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300 | static void __init stmp378x_devb_init(void) |
301 | { |
302 | stmp3xxx_pinmux_init(NR_REAL_IRQS); |
303 | |
304 | /* init stmp3xxx platform */ |
305 | stmp3xxx_init(); |
306 | |
307 | stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control; |
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308 | stmp3xxx_appuart.dev.platform_data = appuart_pins; |
309 | stmp3xxx_mmc.dev.platform_data = &mmc_data; |
310 | stmp3xxx_gpmi.dev.platform_data = &gpmi_data; |
311 | stmp3xxx_spi1.dev.platform_data = &ssp1_pins; |
312 | stmp3xxx_spi2.dev.platform_data = &ssp2_pins; |
313 | stmp378x_i2c.dev.platform_data = &i2c_pins; |
314 | |
315 | /* register spi devices */ |
316 | spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info)); |
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317 | |
318 | /* add board's devices */ |
319 | platform_add_devices(devices, ARRAY_SIZE(devices)); |
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320 | |
321 | /* add devices selected by command line ssp1= and ssp2= options */ |
322 | stmp3xxx_ssp1_device_register(); |
323 | stmp3xxx_ssp2_device_register(); |
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324 | } |
325 | |
326 | MACHINE_START(STMP378X, "STMP378X") |
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327 | .boot_params = 0x40000100, |
328 | .map_io = stmp378x_map_io, |
329 | .init_irq = stmp378x_init_irq, |
330 | .timer = &stmp3xxx_timer, |
331 | .init_machine = stmp378x_devb_init, |
332 | MACHINE_END |