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OMAP: GPIO: Implement GPIO as a platform device
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1 /*
2 * linux/arch/arm/mach-omap2/board-n8x0.c
3 *
4 * Copyright (C) 2005-2009 Nokia Corporation
5 * Author: Juha Yrjola <juha.yrjola@nokia.com>
6 *
7 * Modified from mach-omap2/board-generic.c
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
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/gpio.h>
17 #include <linux/init.h>
18 #include <linux/io.h>
19 #include <linux/stddef.h>
20 #include <linux/i2c.h>
21 #include <linux/spi/spi.h>
22 #include <linux/usb/musb.h>
23 #include <sound/tlv320aic3x.h>
24
25 #include <asm/mach/arch.h>
26 #include <asm/mach-types.h>
27
28 #include <plat/board.h>
29 #include <plat/common.h>
30 #include <plat/menelaus.h>
31 #include <mach/irqs.h>
32 #include <plat/mcspi.h>
33 #include <plat/onenand.h>
34 #include <plat/mmc.h>
35 #include <plat/serial.h>
36
37 #include "mux.h"
38
39 static int slot1_cover_open;
40 static int slot2_cover_open;
41 static struct device *mmc_device;
42
43 #define TUSB6010_ASYNC_CS 1
44 #define TUSB6010_SYNC_CS 4
45 #define TUSB6010_GPIO_INT 58
46 #define TUSB6010_GPIO_ENABLE 0
47 #define TUSB6010_DMACHAN 0x3f
48
49 #if defined(CONFIG_USB_TUSB6010) || \
50 defined(CONFIG_USB_TUSB6010_MODULE)
51 /*
52 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
53 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
54 * provide then PGOOD signal to TUSB6010 which will release it from reset.
55 */
56 static int tusb_set_power(int state)
57 {
58 int i, retval = 0;
59
60 if (state) {
61 gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
62 msleep(1);
63
64 /* Wait until TUSB6010 pulls INT pin down */
65 i = 100;
66 while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
67 msleep(1);
68 i--;
69 }
70
71 if (!i) {
72 printk(KERN_ERR "tusb: powerup failed\n");
73 retval = -ENODEV;
74 }
75 } else {
76 gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
77 msleep(10);
78 }
79
80 return retval;
81 }
82
83 static struct musb_hdrc_config musb_config = {
84 .multipoint = 1,
85 .dyn_fifo = 1,
86 .num_eps = 16,
87 .ram_bits = 12,
88 };
89
90 static struct musb_hdrc_platform_data tusb_data = {
91 #if defined(CONFIG_USB_MUSB_OTG)
92 .mode = MUSB_OTG,
93 #elif defined(CONFIG_USB_MUSB_PERIPHERAL)
94 .mode = MUSB_PERIPHERAL,
95 #else /* defined(CONFIG_USB_MUSB_HOST) */
96 .mode = MUSB_HOST,
97 #endif
98 .set_power = tusb_set_power,
99 .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
100 .power = 100, /* Max 100 mA VBUS for host mode */
101 .config = &musb_config,
102 };
103
104 static void __init n8x0_usb_init(void)
105 {
106 int ret = 0;
107 static char announce[] __initdata = KERN_INFO "TUSB 6010\n";
108
109 /* PM companion chip power control pin */
110 ret = gpio_request(TUSB6010_GPIO_ENABLE, "TUSB6010 enable");
111 if (ret != 0) {
112 printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
113 TUSB6010_GPIO_ENABLE);
114 return;
115 }
116 gpio_direction_output(TUSB6010_GPIO_ENABLE, 0);
117
118 tusb_set_power(0);
119
120 ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
121 TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
122 TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
123 if (ret != 0)
124 goto err;
125
126 printk(announce);
127
128 return;
129
130 err:
131 gpio_free(TUSB6010_GPIO_ENABLE);
132 }
133 #else
134
135 static void __init n8x0_usb_init(void) {}
136
137 #endif /*CONFIG_USB_TUSB6010 */
138
139
140 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
141 .turbo_mode = 0,
142 .single_channel = 1,
143 };
144
145 static struct spi_board_info n800_spi_board_info[] __initdata = {
146 {
147 .modalias = "p54spi",
148 .bus_num = 2,
149 .chip_select = 0,
150 .max_speed_hz = 48000000,
151 .controller_data = &p54spi_mcspi_config,
152 },
153 };
154
155 #if defined(CONFIG_MTD_ONENAND_OMAP2) || \
156 defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
157
158 static struct mtd_partition onenand_partitions[] = {
159 {
160 .name = "bootloader",
161 .offset = 0,
162 .size = 0x20000,
163 .mask_flags = MTD_WRITEABLE, /* Force read-only */
164 },
165 {
166 .name = "config",
167 .offset = MTDPART_OFS_APPEND,
168 .size = 0x60000,
169 },
170 {
171 .name = "kernel",
172 .offset = MTDPART_OFS_APPEND,
173 .size = 0x200000,
174 },
175 {
176 .name = "initfs",
177 .offset = MTDPART_OFS_APPEND,
178 .size = 0x400000,
179 },
180 {
181 .name = "rootfs",
182 .offset = MTDPART_OFS_APPEND,
183 .size = MTDPART_SIZ_FULL,
184 },
185 };
186
187 static struct omap_onenand_platform_data board_onenand_data = {
188 .cs = 0,
189 .gpio_irq = 26,
190 .parts = onenand_partitions,
191 .nr_parts = ARRAY_SIZE(onenand_partitions),
192 .flags = ONENAND_SYNC_READ,
193 };
194
195 static void __init n8x0_onenand_init(void)
196 {
197 gpmc_onenand_init(&board_onenand_data);
198 }
199
200 #else
201
202 static void __init n8x0_onenand_init(void) {}
203
204 #endif
205
206 #if defined(CONFIG_MENELAUS) && \
207 (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE))
208
209 /*
210 * On both N800 and N810, only the first of the two MMC controllers is in use.
211 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
212 * On N800, both slots are powered via Menelaus. On N810, only one of the
213 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
214 *
215 * VMMC slot 1 on both N800 and N810
216 * VDCDC3_APE and VMCS2_APE slot 2 on N800
217 * GPIO23 and GPIO9 slot 2 EMMC on N810
218 *
219 */
220 #define N8X0_SLOT_SWITCH_GPIO 96
221 #define N810_EMMC_VSD_GPIO 23
222 #define N810_EMMC_VIO_GPIO 9
223
224 static int n8x0_mmc_switch_slot(struct device *dev, int slot)
225 {
226 #ifdef CONFIG_MMC_DEBUG
227 dev_dbg(dev, "Choose slot %d\n", slot + 1);
228 #endif
229 gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
230 return 0;
231 }
232
233 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
234 int power_on, int vdd)
235 {
236 int mV;
237
238 #ifdef CONFIG_MMC_DEBUG
239 dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
240 power_on ? "on" : "off", vdd);
241 #endif
242 if (slot == 0) {
243 if (!power_on)
244 return menelaus_set_vmmc(0);
245 switch (1 << vdd) {
246 case MMC_VDD_33_34:
247 case MMC_VDD_32_33:
248 case MMC_VDD_31_32:
249 mV = 3100;
250 break;
251 case MMC_VDD_30_31:
252 mV = 3000;
253 break;
254 case MMC_VDD_28_29:
255 mV = 2800;
256 break;
257 case MMC_VDD_165_195:
258 mV = 1850;
259 break;
260 default:
261 BUG();
262 }
263 return menelaus_set_vmmc(mV);
264 } else {
265 if (!power_on)
266 return menelaus_set_vdcdc(3, 0);
267 switch (1 << vdd) {
268 case MMC_VDD_33_34:
269 case MMC_VDD_32_33:
270 mV = 3300;
271 break;
272 case MMC_VDD_30_31:
273 case MMC_VDD_29_30:
274 mV = 3000;
275 break;
276 case MMC_VDD_28_29:
277 case MMC_VDD_27_28:
278 mV = 2800;
279 break;
280 case MMC_VDD_24_25:
281 case MMC_VDD_23_24:
282 mV = 2400;
283 break;
284 case MMC_VDD_22_23:
285 case MMC_VDD_21_22:
286 mV = 2200;
287 break;
288 case MMC_VDD_20_21:
289 mV = 2000;
290 break;
291 case MMC_VDD_165_195:
292 mV = 1800;
293 break;
294 default:
295 BUG();
296 }
297 return menelaus_set_vdcdc(3, mV);
298 }
299 return 0;
300 }
301
302 static void n810_set_power_emmc(struct device *dev,
303 int power_on)
304 {
305 dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
306
307 if (power_on) {
308 gpio_set_value(N810_EMMC_VSD_GPIO, 1);
309 msleep(1);
310 gpio_set_value(N810_EMMC_VIO_GPIO, 1);
311 msleep(1);
312 } else {
313 gpio_set_value(N810_EMMC_VIO_GPIO, 0);
314 msleep(50);
315 gpio_set_value(N810_EMMC_VSD_GPIO, 0);
316 msleep(50);
317 }
318 }
319
320 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
321 int vdd)
322 {
323 if (machine_is_nokia_n800() || slot == 0)
324 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
325
326 n810_set_power_emmc(dev, power_on);
327
328 return 0;
329 }
330
331 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
332 {
333 int r;
334
335 dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
336 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
337 BUG_ON(slot != 0 && slot != 1);
338 slot++;
339 switch (bus_mode) {
340 case MMC_BUSMODE_OPENDRAIN:
341 r = menelaus_set_mmc_opendrain(slot, 1);
342 break;
343 case MMC_BUSMODE_PUSHPULL:
344 r = menelaus_set_mmc_opendrain(slot, 0);
345 break;
346 default:
347 BUG();
348 }
349 if (r != 0 && printk_ratelimit())
350 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
351 slot);
352 return r;
353 }
354
355 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
356 {
357 slot++;
358 BUG_ON(slot != 1 && slot != 2);
359 if (slot == 1)
360 return slot1_cover_open;
361 else
362 return slot2_cover_open;
363 }
364
365 static void n8x0_mmc_callback(void *data, u8 card_mask)
366 {
367 int bit, *openp, index;
368
369 if (machine_is_nokia_n800()) {
370 bit = 1 << 1;
371 openp = &slot2_cover_open;
372 index = 1;
373 } else {
374 bit = 1;
375 openp = &slot1_cover_open;
376 index = 0;
377 }
378
379 if (card_mask & bit)
380 *openp = 1;
381 else
382 *openp = 0;
383
384 omap_mmc_notify_cover_event(mmc_device, index, *openp);
385 }
386
387 static int n8x0_mmc_late_init(struct device *dev)
388 {
389 int r, bit, *openp;
390 int vs2sel;
391
392 mmc_device = dev;
393
394 r = menelaus_set_slot_sel(1);
395 if (r < 0)
396 return r;
397
398 if (machine_is_nokia_n800())
399 vs2sel = 0;
400 else
401 vs2sel = 2;
402
403 r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
404 if (r < 0)
405 return r;
406
407 n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
408 n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
409
410 r = menelaus_set_mmc_slot(1, 1, 0, 1);
411 if (r < 0)
412 return r;
413 r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
414 if (r < 0)
415 return r;
416
417 r = menelaus_get_slot_pin_states();
418 if (r < 0)
419 return r;
420
421 if (machine_is_nokia_n800()) {
422 bit = 1 << 1;
423 openp = &slot2_cover_open;
424 } else {
425 bit = 1;
426 openp = &slot1_cover_open;
427 slot2_cover_open = 0;
428 }
429
430 /* All slot pin bits seem to be inversed until first switch change */
431 if (r == 0xf || r == (0xf & ~bit))
432 r = ~r;
433
434 if (r & bit)
435 *openp = 1;
436 else
437 *openp = 0;
438
439 r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
440
441 return r;
442 }
443
444 static void n8x0_mmc_shutdown(struct device *dev)
445 {
446 int vs2sel;
447
448 if (machine_is_nokia_n800())
449 vs2sel = 0;
450 else
451 vs2sel = 2;
452
453 menelaus_set_mmc_slot(1, 0, 0, 0);
454 menelaus_set_mmc_slot(2, 0, vs2sel, 0);
455 }
456
457 static void n8x0_mmc_cleanup(struct device *dev)
458 {
459 menelaus_unregister_mmc_callback();
460
461 gpio_free(N8X0_SLOT_SWITCH_GPIO);
462
463 if (machine_is_nokia_n810()) {
464 gpio_free(N810_EMMC_VSD_GPIO);
465 gpio_free(N810_EMMC_VIO_GPIO);
466 }
467 }
468
469 /*
470 * MMC controller1 has two slots that are multiplexed via I2C.
471 * MMC controller2 is not in use.
472 */
473 static struct omap_mmc_platform_data mmc1_data = {
474 .nr_slots = 2,
475 .switch_slot = n8x0_mmc_switch_slot,
476 .init = n8x0_mmc_late_init,
477 .cleanup = n8x0_mmc_cleanup,
478 .shutdown = n8x0_mmc_shutdown,
479 .max_freq = 24000000,
480 .dma_mask = 0xffffffff,
481 .slots[0] = {
482 .wires = 4,
483 .set_power = n8x0_mmc_set_power,
484 .set_bus_mode = n8x0_mmc_set_bus_mode,
485 .get_cover_state = n8x0_mmc_get_cover_state,
486 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_30_31 |
487 MMC_VDD_32_33 | MMC_VDD_33_34,
488 .name = "internal",
489 },
490 .slots[1] = {
491 .set_power = n8x0_mmc_set_power,
492 .set_bus_mode = n8x0_mmc_set_bus_mode,
493 .get_cover_state = n8x0_mmc_get_cover_state,
494 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_20_21 |
495 MMC_VDD_21_22 | MMC_VDD_22_23 |
496 MMC_VDD_23_24 | MMC_VDD_24_25 |
497 MMC_VDD_27_28 | MMC_VDD_28_29 |
498 MMC_VDD_29_30 | MMC_VDD_30_31 |
499 MMC_VDD_32_33 | MMC_VDD_33_34,
500 .name = "external",
501 },
502 };
503
504 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
505
506 static void __init n8x0_mmc_init(void)
507
508 {
509 int err;
510
511 if (machine_is_nokia_n810()) {
512 mmc1_data.slots[0].name = "external";
513
514 /*
515 * Some Samsung Movinand chips do not like open-ended
516 * multi-block reads and fall to braind-dead state
517 * while doing so. Reducing the number of blocks in
518 * the transfer or delays in clock disable do not help
519 */
520 mmc1_data.slots[1].name = "internal";
521 mmc1_data.slots[1].ban_openended = 1;
522 }
523
524 err = gpio_request(N8X0_SLOT_SWITCH_GPIO, "MMC slot switch");
525 if (err)
526 return;
527
528 gpio_direction_output(N8X0_SLOT_SWITCH_GPIO, 0);
529
530 if (machine_is_nokia_n810()) {
531 err = gpio_request(N810_EMMC_VSD_GPIO, "MMC slot 2 Vddf");
532 if (err) {
533 gpio_free(N8X0_SLOT_SWITCH_GPIO);
534 return;
535 }
536 gpio_direction_output(N810_EMMC_VSD_GPIO, 0);
537
538 err = gpio_request(N810_EMMC_VIO_GPIO, "MMC slot 2 Vdd");
539 if (err) {
540 gpio_free(N8X0_SLOT_SWITCH_GPIO);
541 gpio_free(N810_EMMC_VSD_GPIO);
542 return;
543 }
544 gpio_direction_output(N810_EMMC_VIO_GPIO, 0);
545 }
546
547 mmc_data[0] = &mmc1_data;
548 omap2_init_mmc(mmc_data, OMAP24XX_NR_MMC);
549 }
550 #else
551
552 void __init n8x0_mmc_init(void)
553 {
554 }
555 #endif /* CONFIG_MMC_OMAP */
556
557 #ifdef CONFIG_MENELAUS
558
559 static int n8x0_auto_sleep_regulators(void)
560 {
561 u32 val;
562 int ret;
563
564 val = EN_VPLL_SLEEP | EN_VMMC_SLEEP \
565 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
566 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
567 | EN_VC_SLEEP | EN_DC2_SLEEP;
568
569 ret = menelaus_set_regulator_sleep(1, val);
570 if (ret < 0) {
571 printk(KERN_ERR "Could not set regulators to sleep on "
572 "menelaus: %u\n", ret);
573 return ret;
574 }
575 return 0;
576 }
577
578 static int n8x0_auto_voltage_scale(void)
579 {
580 int ret;
581
582 ret = menelaus_set_vcore_hw(1400, 1050);
583 if (ret < 0) {
584 printk(KERN_ERR "Could not set VCORE voltage on "
585 "menelaus: %u\n", ret);
586 return ret;
587 }
588 return 0;
589 }
590
591 static int n8x0_menelaus_late_init(struct device *dev)
592 {
593 int ret;
594
595 ret = n8x0_auto_voltage_scale();
596 if (ret < 0)
597 return ret;
598 ret = n8x0_auto_sleep_regulators();
599 if (ret < 0)
600 return ret;
601 return 0;
602 }
603
604 #else
605 static int n8x0_menelaus_late_init(struct device *dev)
606 {
607 return 0;
608 }
609 #endif
610
611 static struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
612 .late_init = n8x0_menelaus_late_init,
613 };
614
615 static struct i2c_board_info __initdata n8x0_i2c_board_info_1[] __initdata = {
616 {
617 I2C_BOARD_INFO("menelaus", 0x72),
618 .irq = INT_24XX_SYS_NIRQ,
619 .platform_data = &n8x0_menelaus_platform_data,
620 },
621 };
622
623 static struct aic3x_pdata n810_aic33_data __initdata = {
624 .gpio_reset = 118,
625 };
626
627 static struct i2c_board_info n810_i2c_board_info_2[] __initdata = {
628 {
629 I2C_BOARD_INFO("tlv320aic3x", 0x18),
630 .platform_data = &n810_aic33_data,
631 },
632 };
633
634 static void __init n8x0_map_io(void)
635 {
636 omap2_set_globals_242x();
637 omap242x_map_common_io();
638 }
639
640 static void __init n8x0_init_irq(void)
641 {
642 omap2_init_common_hw(NULL, NULL);
643 omap_init_irq();
644 }
645
646 #ifdef CONFIG_OMAP_MUX
647 static struct omap_board_mux board_mux[] __initdata = {
648 /* I2S codec port pins for McBSP block */
649 OMAP2420_MUX(EAC_AC_SCLK, OMAP_MUX_MODE1 | OMAP_PIN_INPUT),
650 OMAP2420_MUX(EAC_AC_FS, OMAP_MUX_MODE1 | OMAP_PIN_INPUT),
651 OMAP2420_MUX(EAC_AC_DIN, OMAP_MUX_MODE1 | OMAP_PIN_INPUT),
652 OMAP2420_MUX(EAC_AC_DOUT, OMAP_MUX_MODE1 | OMAP_PIN_OUTPUT),
653 { .reg_offset = OMAP_MUX_TERMINATOR },
654 };
655 #else
656 #define board_mux NULL
657 #endif
658
659 static void __init n8x0_init_machine(void)
660 {
661 omap2420_mux_init(board_mux, OMAP_PACKAGE_ZAC);
662 /* FIXME: add n810 spi devices */
663 spi_register_board_info(n800_spi_board_info,
664 ARRAY_SIZE(n800_spi_board_info));
665 omap_register_i2c_bus(1, 400, n8x0_i2c_board_info_1,
666 ARRAY_SIZE(n8x0_i2c_board_info_1));
667 omap_register_i2c_bus(2, 400, NULL, 0);
668 if (machine_is_nokia_n810())
669 i2c_register_board_info(2, n810_i2c_board_info_2,
670 ARRAY_SIZE(n810_i2c_board_info_2));
671
672 omap_serial_init();
673 n8x0_onenand_init();
674 n8x0_mmc_init();
675 n8x0_usb_init();
676 }
677
678 MACHINE_START(NOKIA_N800, "Nokia N800")
679 .boot_params = 0x80000100,
680 .map_io = n8x0_map_io,
681 .reserve = omap_reserve,
682 .init_irq = n8x0_init_irq,
683 .init_machine = n8x0_init_machine,
684 .timer = &omap_timer,
685 MACHINE_END
686
687 MACHINE_START(NOKIA_N810, "Nokia N810")
688 .boot_params = 0x80000100,
689 .map_io = n8x0_map_io,
690 .reserve = omap_reserve,
691 .init_irq = n8x0_init_irq,
692 .init_machine = n8x0_init_machine,
693 .timer = &omap_timer,
694 MACHINE_END
695
696 MACHINE_START(NOKIA_N810_WIMAX, "Nokia N810 WiMAX")
697 .boot_params = 0x80000100,
698 .map_io = n8x0_map_io,
699 .reserve = omap_reserve,
700 .init_irq = n8x0_init_irq,
701 .init_machine = n8x0_init_machine,
702 .timer = &omap_timer,
703 MACHINE_END