1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/arch/arm/mach-omap2/board-n8x0.c
4 *
5 * Copyright (C) 2005-2009 Nokia Corporation
6 * Author: Juha Yrjola <juha.yrjola@nokia.com>
7 *
8 * Modified from mach-omap2/board-generic.c
9 */
10
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/init.h>
15 #include <linux/io.h>
16 #include <linux/irq.h>
17 #include <linux/stddef.h>
18 #include <linux/i2c.h>
19 #include <linux/spi/spi.h>
20 #include <linux/usb/musb.h>
21 #include <linux/mmc/host.h>
22 #include <linux/platform_data/spi-omap2-mcspi.h>
23 #include <linux/platform_data/mmc-omap.h>
24 #include <linux/mfd/menelaus.h>
25 #include <sound/tlv320aic3x.h>
26
27 #include <asm/mach/arch.h>
28 #include <asm/mach-types.h>
29
30 #include "common.h"
31 #include "mmc.h"
32 #include "soc.h"
33 #include "common-board-devices.h"
34
35 #define TUSB6010_ASYNC_CS 1
36 #define TUSB6010_SYNC_CS 4
37 #define TUSB6010_GPIO_INT 58
38 #define TUSB6010_GPIO_ENABLE 0
39 #define TUSB6010_DMACHAN 0x3f
40
41 #define NOKIA_N810_WIMAX (1 << 2)
42 #define NOKIA_N810 (1 << 1)
43 #define NOKIA_N800 (1 << 0)
44
45 static u32 board_caps;
46
47 #define board_is_n800() (board_caps & NOKIA_N800)
48 #define board_is_n810() (board_caps & NOKIA_N810)
49 #define board_is_n810_wimax() (board_caps & NOKIA_N810_WIMAX)
50
board_check_revision(void)51 static void board_check_revision(void)
52 {
53 if (of_machine_is_compatible("nokia,n800"))
54 board_caps = NOKIA_N800;
55 else if (of_machine_is_compatible("nokia,n810"))
56 board_caps = NOKIA_N810;
57 else if (of_machine_is_compatible("nokia,n810-wimax"))
58 board_caps = NOKIA_N810_WIMAX;
59
60 if (!board_caps)
61 pr_err("Unknown board\n");
62 }
63
64 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
65 /*
66 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
67 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
68 * provide then PGOOD signal to TUSB6010 which will release it from reset.
69 */
tusb_set_power(int state)70 static int tusb_set_power(int state)
71 {
72 int i, retval = 0;
73
74 if (state) {
75 gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
76 msleep(1);
77
78 /* Wait until TUSB6010 pulls INT pin down */
79 i = 100;
80 while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
81 msleep(1);
82 i--;
83 }
84
85 if (!i) {
86 printk(KERN_ERR "tusb: powerup failed\n");
87 retval = -ENODEV;
88 }
89 } else {
90 gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
91 msleep(10);
92 }
93
94 return retval;
95 }
96
97 static struct musb_hdrc_config musb_config = {
98 .multipoint = 1,
99 .dyn_fifo = 1,
100 .num_eps = 16,
101 .ram_bits = 12,
102 };
103
104 static struct musb_hdrc_platform_data tusb_data = {
105 .mode = MUSB_OTG,
106 .set_power = tusb_set_power,
107 .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
108 .power = 100, /* Max 100 mA VBUS for host mode */
109 .config = &musb_config,
110 };
111
n8x0_usb_init(void)112 static void __init n8x0_usb_init(void)
113 {
114 int ret = 0;
115 static const char announce[] __initconst = KERN_INFO "TUSB 6010\n";
116
117 /* PM companion chip power control pin */
118 ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
119 "TUSB6010 enable");
120 if (ret != 0) {
121 printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
122 TUSB6010_GPIO_ENABLE);
123 return;
124 }
125 tusb_set_power(0);
126
127 ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
128 TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
129 TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
130 if (ret != 0)
131 goto err;
132
133 printk(announce);
134
135 return;
136
137 err:
138 gpio_free(TUSB6010_GPIO_ENABLE);
139 }
140 #else
141
n8x0_usb_init(void)142 static void __init n8x0_usb_init(void) {}
143
144 #endif /*CONFIG_USB_MUSB_TUSB6010 */
145
146
147 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
148 .turbo_mode = 0,
149 };
150
151 static struct spi_board_info n800_spi_board_info[] __initdata = {
152 {
153 .modalias = "p54spi",
154 .bus_num = 2,
155 .chip_select = 0,
156 .max_speed_hz = 48000000,
157 .controller_data = &p54spi_mcspi_config,
158 },
159 };
160
161 #if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
162
163 /*
164 * On both N800 and N810, only the first of the two MMC controllers is in use.
165 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
166 * On N800, both slots are powered via Menelaus. On N810, only one of the
167 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
168 *
169 * VMMC slot 1 on both N800 and N810
170 * VDCDC3_APE and VMCS2_APE slot 2 on N800
171 * GPIO23 and GPIO9 slot 2 EMMC on N810
172 *
173 */
174 #define N8X0_SLOT_SWITCH_GPIO 96
175 #define N810_EMMC_VSD_GPIO 23
176 #define N810_EMMC_VIO_GPIO 9
177
178 static int slot1_cover_open;
179 static int slot2_cover_open;
180 static struct device *mmc_device;
181
n8x0_mmc_switch_slot(struct device * dev,int slot)182 static int n8x0_mmc_switch_slot(struct device *dev, int slot)
183 {
184 #ifdef CONFIG_MMC_DEBUG
185 dev_dbg(dev, "Choose slot %d\n", slot + 1);
186 #endif
187 gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
188 return 0;
189 }
190
n8x0_mmc_set_power_menelaus(struct device * dev,int slot,int power_on,int vdd)191 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
192 int power_on, int vdd)
193 {
194 int mV;
195
196 #ifdef CONFIG_MMC_DEBUG
197 dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
198 power_on ? "on" : "off", vdd);
199 #endif
200 if (slot == 0) {
201 if (!power_on)
202 return menelaus_set_vmmc(0);
203 switch (1 << vdd) {
204 case MMC_VDD_33_34:
205 case MMC_VDD_32_33:
206 case MMC_VDD_31_32:
207 mV = 3100;
208 break;
209 case MMC_VDD_30_31:
210 mV = 3000;
211 break;
212 case MMC_VDD_28_29:
213 mV = 2800;
214 break;
215 case MMC_VDD_165_195:
216 mV = 1850;
217 break;
218 default:
219 BUG();
220 }
221 return menelaus_set_vmmc(mV);
222 } else {
223 if (!power_on)
224 return menelaus_set_vdcdc(3, 0);
225 switch (1 << vdd) {
226 case MMC_VDD_33_34:
227 case MMC_VDD_32_33:
228 mV = 3300;
229 break;
230 case MMC_VDD_30_31:
231 case MMC_VDD_29_30:
232 mV = 3000;
233 break;
234 case MMC_VDD_28_29:
235 case MMC_VDD_27_28:
236 mV = 2800;
237 break;
238 case MMC_VDD_24_25:
239 case MMC_VDD_23_24:
240 mV = 2400;
241 break;
242 case MMC_VDD_22_23:
243 case MMC_VDD_21_22:
244 mV = 2200;
245 break;
246 case MMC_VDD_20_21:
247 mV = 2000;
248 break;
249 case MMC_VDD_165_195:
250 mV = 1800;
251 break;
252 default:
253 BUG();
254 }
255 return menelaus_set_vdcdc(3, mV);
256 }
257 return 0;
258 }
259
n810_set_power_emmc(struct device * dev,int power_on)260 static void n810_set_power_emmc(struct device *dev,
261 int power_on)
262 {
263 dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
264
265 if (power_on) {
266 gpio_set_value(N810_EMMC_VSD_GPIO, 1);
267 msleep(1);
268 gpio_set_value(N810_EMMC_VIO_GPIO, 1);
269 msleep(1);
270 } else {
271 gpio_set_value(N810_EMMC_VIO_GPIO, 0);
272 msleep(50);
273 gpio_set_value(N810_EMMC_VSD_GPIO, 0);
274 msleep(50);
275 }
276 }
277
n8x0_mmc_set_power(struct device * dev,int slot,int power_on,int vdd)278 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
279 int vdd)
280 {
281 if (board_is_n800() || slot == 0)
282 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
283
284 n810_set_power_emmc(dev, power_on);
285
286 return 0;
287 }
288
n8x0_mmc_set_bus_mode(struct device * dev,int slot,int bus_mode)289 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
290 {
291 int r;
292
293 dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
294 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
295 BUG_ON(slot != 0 && slot != 1);
296 slot++;
297 switch (bus_mode) {
298 case MMC_BUSMODE_OPENDRAIN:
299 r = menelaus_set_mmc_opendrain(slot, 1);
300 break;
301 case MMC_BUSMODE_PUSHPULL:
302 r = menelaus_set_mmc_opendrain(slot, 0);
303 break;
304 default:
305 BUG();
306 }
307 if (r != 0 && printk_ratelimit())
308 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
309 slot);
310 return r;
311 }
312
n8x0_mmc_get_cover_state(struct device * dev,int slot)313 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
314 {
315 slot++;
316 BUG_ON(slot != 1 && slot != 2);
317 if (slot == 1)
318 return slot1_cover_open;
319 else
320 return slot2_cover_open;
321 }
322
n8x0_mmc_callback(void * data,u8 card_mask)323 static void n8x0_mmc_callback(void *data, u8 card_mask)
324 {
325 int bit, *openp, index;
326
327 if (board_is_n800()) {
328 bit = 1 << 1;
329 openp = &slot2_cover_open;
330 index = 1;
331 } else {
332 bit = 1;
333 openp = &slot1_cover_open;
334 index = 0;
335 }
336
337 if (card_mask & bit)
338 *openp = 1;
339 else
340 *openp = 0;
341
342 #ifdef CONFIG_MMC_OMAP
343 omap_mmc_notify_cover_event(mmc_device, index, *openp);
344 #else
345 pr_warn("MMC: notify cover event not available\n");
346 #endif
347 }
348
n8x0_mmc_late_init(struct device * dev)349 static int n8x0_mmc_late_init(struct device *dev)
350 {
351 int r, bit, *openp;
352 int vs2sel;
353
354 mmc_device = dev;
355
356 r = menelaus_set_slot_sel(1);
357 if (r < 0)
358 return r;
359
360 if (board_is_n800())
361 vs2sel = 0;
362 else
363 vs2sel = 2;
364
365 r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
366 if (r < 0)
367 return r;
368
369 n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
370 n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
371
372 r = menelaus_set_mmc_slot(1, 1, 0, 1);
373 if (r < 0)
374 return r;
375 r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
376 if (r < 0)
377 return r;
378
379 r = menelaus_get_slot_pin_states();
380 if (r < 0)
381 return r;
382
383 if (board_is_n800()) {
384 bit = 1 << 1;
385 openp = &slot2_cover_open;
386 } else {
387 bit = 1;
388 openp = &slot1_cover_open;
389 slot2_cover_open = 0;
390 }
391
392 /* All slot pin bits seem to be inversed until first switch change */
393 if (r == 0xf || r == (0xf & ~bit))
394 r = ~r;
395
396 if (r & bit)
397 *openp = 1;
398 else
399 *openp = 0;
400
401 r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
402
403 return r;
404 }
405
n8x0_mmc_shutdown(struct device * dev)406 static void n8x0_mmc_shutdown(struct device *dev)
407 {
408 int vs2sel;
409
410 if (board_is_n800())
411 vs2sel = 0;
412 else
413 vs2sel = 2;
414
415 menelaus_set_mmc_slot(1, 0, 0, 0);
416 menelaus_set_mmc_slot(2, 0, vs2sel, 0);
417 }
418
n8x0_mmc_cleanup(struct device * dev)419 static void n8x0_mmc_cleanup(struct device *dev)
420 {
421 menelaus_unregister_mmc_callback();
422
423 gpio_free(N8X0_SLOT_SWITCH_GPIO);
424
425 if (board_is_n810()) {
426 gpio_free(N810_EMMC_VSD_GPIO);
427 gpio_free(N810_EMMC_VIO_GPIO);
428 }
429 }
430
431 /*
432 * MMC controller1 has two slots that are multiplexed via I2C.
433 * MMC controller2 is not in use.
434 */
435 static struct omap_mmc_platform_data mmc1_data = {
436 .nr_slots = 0,
437 .switch_slot = n8x0_mmc_switch_slot,
438 .init = n8x0_mmc_late_init,
439 .cleanup = n8x0_mmc_cleanup,
440 .shutdown = n8x0_mmc_shutdown,
441 .max_freq = 24000000,
442 .slots[0] = {
443 .wires = 4,
444 .set_power = n8x0_mmc_set_power,
445 .set_bus_mode = n8x0_mmc_set_bus_mode,
446 .get_cover_state = n8x0_mmc_get_cover_state,
447 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_30_31 |
448 MMC_VDD_32_33 | MMC_VDD_33_34,
449 .name = "internal",
450 },
451 .slots[1] = {
452 .set_power = n8x0_mmc_set_power,
453 .set_bus_mode = n8x0_mmc_set_bus_mode,
454 .get_cover_state = n8x0_mmc_get_cover_state,
455 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_20_21 |
456 MMC_VDD_21_22 | MMC_VDD_22_23 |
457 MMC_VDD_23_24 | MMC_VDD_24_25 |
458 MMC_VDD_27_28 | MMC_VDD_28_29 |
459 MMC_VDD_29_30 | MMC_VDD_30_31 |
460 MMC_VDD_32_33 | MMC_VDD_33_34,
461 .name = "external",
462 },
463 };
464
465 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
466
467 static struct gpio n810_emmc_gpios[] __initdata = {
468 { N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW, "MMC slot 2 Vddf" },
469 { N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW, "MMC slot 2 Vdd" },
470 };
471
n8x0_mmc_init(void)472 static void __init n8x0_mmc_init(void)
473 {
474 int err;
475
476 if (board_is_n810()) {
477 mmc1_data.slots[0].name = "external";
478
479 /*
480 * Some Samsung Movinand chips do not like open-ended
481 * multi-block reads and fall to braind-dead state
482 * while doing so. Reducing the number of blocks in
483 * the transfer or delays in clock disable do not help
484 */
485 mmc1_data.slots[1].name = "internal";
486 mmc1_data.slots[1].ban_openended = 1;
487 }
488
489 err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
490 "MMC slot switch");
491 if (err)
492 return;
493
494 if (board_is_n810()) {
495 err = gpio_request_array(n810_emmc_gpios,
496 ARRAY_SIZE(n810_emmc_gpios));
497 if (err) {
498 gpio_free(N8X0_SLOT_SWITCH_GPIO);
499 return;
500 }
501 }
502
503 mmc1_data.nr_slots = 2;
504 mmc_data[0] = &mmc1_data;
505 }
506 #else
507 static struct omap_mmc_platform_data mmc1_data;
n8x0_mmc_init(void)508 void __init n8x0_mmc_init(void)
509 {
510 }
511 #endif /* CONFIG_MMC_OMAP */
512
513 #ifdef CONFIG_MENELAUS
514
n8x0_auto_sleep_regulators(void)515 static int n8x0_auto_sleep_regulators(void)
516 {
517 u32 val;
518 int ret;
519
520 val = EN_VPLL_SLEEP | EN_VMMC_SLEEP \
521 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
522 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
523 | EN_VC_SLEEP | EN_DC2_SLEEP;
524
525 ret = menelaus_set_regulator_sleep(1, val);
526 if (ret < 0) {
527 pr_err("Could not set regulators to sleep on menelaus: %u\n",
528 ret);
529 return ret;
530 }
531 return 0;
532 }
533
n8x0_auto_voltage_scale(void)534 static int n8x0_auto_voltage_scale(void)
535 {
536 int ret;
537
538 ret = menelaus_set_vcore_hw(1400, 1050);
539 if (ret < 0) {
540 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
541 return ret;
542 }
543 return 0;
544 }
545
n8x0_menelaus_late_init(struct device * dev)546 static int n8x0_menelaus_late_init(struct device *dev)
547 {
548 int ret;
549
550 ret = n8x0_auto_voltage_scale();
551 if (ret < 0)
552 return ret;
553 ret = n8x0_auto_sleep_regulators();
554 if (ret < 0)
555 return ret;
556 return 0;
557 }
558
559 #else
n8x0_menelaus_late_init(struct device * dev)560 static int n8x0_menelaus_late_init(struct device *dev)
561 {
562 return 0;
563 }
564 #endif
565
566 struct menelaus_platform_data n8x0_menelaus_platform_data = {
567 .late_init = n8x0_menelaus_late_init,
568 };
569
570 struct aic3x_pdata n810_aic33_data = {
571 .gpio_reset = 118,
572 };
573
n8x0_late_initcall(void)574 static int __init n8x0_late_initcall(void)
575 {
576 if (!board_caps)
577 return -ENODEV;
578
579 n8x0_mmc_init();
580 n8x0_usb_init();
581
582 return 0;
583 }
584 omap_late_initcall(n8x0_late_initcall);
585
586 /*
587 * Legacy init pdata init for n8x0. Note that we want to follow the
588 * I2C bus numbering starting at 0 for device tree like other omaps.
589 */
n8x0_legacy_init(void)590 void * __init n8x0_legacy_init(void)
591 {
592 board_check_revision();
593 spi_register_board_info(n800_spi_board_info,
594 ARRAY_SIZE(n800_spi_board_info));
595 return &mmc1_data;
596 }
597
