aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-omap2/usb-host.c
blob: ab983cdd3edf9c09e61621212b48cc9be17f0b91 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
/*
 * usb-host.c - OMAP USB Host
 *
 * This file will contain the board specific details for the
 * Synopsys EHCI/OHCI host controller on OMAP3430 and onwards
 *
 * Copyright (C) 2007-2011 Texas Instruments
 * Author: Vikram Pandita <vikram.pandita@ti.com>
 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
 *
 * Generalization by:
 * Felipe Balbi <balbi@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <linux/string.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/usb/phy.h>
#include <linux/usb/usb_phy_gen_xceiv.h>

#include "soc.h"
#include "omap_device.h"
#include "mux.h"
#include "usb.h"

#ifdef CONFIG_MFD_OMAP_USB_HOST

#define OMAP_USBHS_DEVICE	"usbhs_omap"
#define OMAP_USBTLL_DEVICE	"usbhs_tll"
#define	USBHS_UHH_HWMODNAME	"usb_host_hs"
#define USBHS_TLL_HWMODNAME	"usb_tll_hs"

/* MUX settings for EHCI pins */
/*
 * setup_ehci_io_mux - initialize IO pad mux for USBHOST
 */
static void __init setup_ehci_io_mux(const enum usbhs_omap_port_mode *port_mode)
{
	switch (port_mode[0]) {
	case OMAP_EHCI_PORT_MODE_PHY:
		omap_mux_init_signal("hsusb1_stp", OMAP_PIN_OUTPUT);
		omap_mux_init_signal("hsusb1_clk", OMAP_PIN_OUTPUT);
		omap_mux_init_signal("hsusb1_dir", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_nxt", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data0", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data1", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data2", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data3", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data4", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data5", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data6", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_data7", OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_EHCI_PORT_MODE_TLL:
		omap_mux_init_signal("hsusb1_tll_stp",
			OMAP_PIN_INPUT_PULLUP);
		omap_mux_init_signal("hsusb1_tll_clk",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_dir",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_nxt",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data1",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data2",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data3",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data4",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data5",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data6",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb1_tll_data7",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_USBHS_PORT_MODE_UNUSED:
		/* FALLTHROUGH */
	default:
		break;
	}

	switch (port_mode[1]) {
	case OMAP_EHCI_PORT_MODE_PHY:
		omap_mux_init_signal("hsusb2_stp", OMAP_PIN_OUTPUT);
		omap_mux_init_signal("hsusb2_clk", OMAP_PIN_OUTPUT);
		omap_mux_init_signal("hsusb2_dir", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_nxt", OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data1",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data2",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data3",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data4",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data5",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data6",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_data7",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_EHCI_PORT_MODE_TLL:
		omap_mux_init_signal("hsusb2_tll_stp",
			OMAP_PIN_INPUT_PULLUP);
		omap_mux_init_signal("hsusb2_tll_clk",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_dir",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_nxt",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data1",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data2",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data3",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data4",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data5",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data6",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb2_tll_data7",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_USBHS_PORT_MODE_UNUSED:
		/* FALLTHROUGH */
	default:
		break;
	}

	switch (port_mode[2]) {
	case OMAP_EHCI_PORT_MODE_PHY:
		printk(KERN_WARNING "Port3 can't be used in PHY mode\n");
		break;
	case OMAP_EHCI_PORT_MODE_TLL:
		omap_mux_init_signal("hsusb3_tll_stp",
			OMAP_PIN_INPUT_PULLUP);
		omap_mux_init_signal("hsusb3_tll_clk",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_dir",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_nxt",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data1",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data2",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data3",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data4",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data5",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data6",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("hsusb3_tll_data7",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_USBHS_PORT_MODE_UNUSED:
		/* FALLTHROUGH */
	default:
		break;
	}

	return;
}

static void __init setup_ohci_io_mux(const enum usbhs_omap_port_mode *port_mode)
{
	switch (port_mode[0]) {
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
		omap_mux_init_signal("mm1_rxdp",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("mm1_rxdm",
			OMAP_PIN_INPUT_PULLDOWN);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
		omap_mux_init_signal("mm1_rxrcv",
			OMAP_PIN_INPUT_PULLDOWN);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
		omap_mux_init_signal("mm1_txen_n", OMAP_PIN_OUTPUT);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
		omap_mux_init_signal("mm1_txse0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("mm1_txdat",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_USBHS_PORT_MODE_UNUSED:
		/* FALLTHROUGH */
	default:
		break;
	}
	switch (port_mode[1]) {
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
		omap_mux_init_signal("mm2_rxdp",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("mm2_rxdm",
			OMAP_PIN_INPUT_PULLDOWN);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
		omap_mux_init_signal("mm2_rxrcv",
			OMAP_PIN_INPUT_PULLDOWN);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
		omap_mux_init_signal("mm2_txen_n", OMAP_PIN_OUTPUT);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
		omap_mux_init_signal("mm2_txse0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("mm2_txdat",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_USBHS_PORT_MODE_UNUSED:
		/* FALLTHROUGH */
	default:
		break;
	}
	switch (port_mode[2]) {
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
		omap_mux_init_signal("mm3_rxdp",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("mm3_rxdm",
			OMAP_PIN_INPUT_PULLDOWN);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
		omap_mux_init_signal("mm3_rxrcv",
			OMAP_PIN_INPUT_PULLDOWN);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
		omap_mux_init_signal("mm3_txen_n", OMAP_PIN_OUTPUT);
		/* FALLTHROUGH */
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
		omap_mux_init_signal("mm3_txse0",
			OMAP_PIN_INPUT_PULLDOWN);
		omap_mux_init_signal("mm3_txdat",
			OMAP_PIN_INPUT_PULLDOWN);
		break;
	case OMAP_USBHS_PORT_MODE_UNUSED:
		/* FALLTHROUGH */
	default:
		break;
	}
}

void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
{
	struct omap_hwmod	*uhh_hwm, *tll_hwm;
	struct platform_device	*pdev;
	int			bus_id = -1;

	if (cpu_is_omap34xx()) {
		setup_ehci_io_mux(pdata->port_mode);
		setup_ohci_io_mux(pdata->port_mode);

		if (omap_rev() <= OMAP3430_REV_ES2_1)
			pdata->single_ulpi_bypass = true;

	}

	uhh_hwm = omap_hwmod_lookup(USBHS_UHH_HWMODNAME);
	if (!uhh_hwm) {
		pr_err("Could not look up %s\n", USBHS_UHH_HWMODNAME);
		return;
	}

	tll_hwm = omap_hwmod_lookup(USBHS_TLL_HWMODNAME);
	if (!tll_hwm) {
		pr_err("Could not look up %s\n", USBHS_TLL_HWMODNAME);
		return;
	}

	pdev = omap_device_build(OMAP_USBTLL_DEVICE, bus_id, tll_hwm,
				pdata, sizeof(*pdata));
	if (IS_ERR(pdev)) {
		pr_err("Could not build hwmod device %s\n",
		       USBHS_TLL_HWMODNAME);
		return;
	}

	pdev = omap_device_build(OMAP_USBHS_DEVICE, bus_id, uhh_hwm,
				pdata, sizeof(*pdata));
	if (IS_ERR(pdev)) {
		pr_err("Could not build hwmod devices %s\n",
		       USBHS_UHH_HWMODNAME);
		return;
	}
}

#else

void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
{
}

#endif

/* Template for PHY regulators */
static struct fixed_voltage_config hsusb_reg_config = {
	/* .supply_name filled later */
	.microvolts = 3300000,
	.gpio = -1,		/* updated later */
	.startup_delay = 70000, /* 70msec */
	.enable_high = 1,	/* updated later */
	.enabled_at_boot = 0,	/* keep in RESET */
	/* .init_data filled later */
};

static const char *nop_name = "usb_phy_generic"; /* NOP PHY driver */
static const char *reg_name = "reg-fixed-voltage"; /* Regulator driver */

/**
 * usbhs_add_regulator - Add a gpio based fixed voltage regulator device
 * @name: name for the regulator
 * @dev_id: device id of the device this regulator supplies power to
 * @dev_supply: supply name that the device expects
 * @gpio: GPIO number
 * @polarity: 1 - Active high, 0 - Active low
 */
static int usbhs_add_regulator(char *name, char *dev_id, char *dev_supply,
						int gpio, int polarity)
{
	struct regulator_consumer_supply *supplies;
	struct regulator_init_data *reg_data;
	struct fixed_voltage_config *config;
	struct platform_device *pdev;
	struct platform_device_info pdevinfo;
	int ret = -ENOMEM;

	supplies = kzalloc(sizeof(*supplies), GFP_KERNEL);
	if (!supplies)
		return -ENOMEM;

	supplies->supply = dev_supply;
	supplies->dev_name = dev_id;

	reg_data = kzalloc(sizeof(*reg_data), GFP_KERNEL);
	if (!reg_data)
		goto err_data;

	reg_data->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
	reg_data->consumer_supplies = supplies;
	reg_data->num_consumer_supplies = 1;

	config = kmemdup(&hsusb_reg_config, sizeof(hsusb_reg_config),
			GFP_KERNEL);
	if (!config)
		goto err_config;

	config->supply_name = kstrdup(name, GFP_KERNEL);
	if (!config->supply_name)
		goto err_supplyname;

	config->gpio = gpio;
	config->enable_high = polarity;
	config->init_data = reg_data;

	/* create a regulator device */
	memset(&pdevinfo, 0, sizeof(pdevinfo));
	pdevinfo.name = reg_name;
	pdevinfo.id = PLATFORM_DEVID_AUTO;
	pdevinfo.data = config;
	pdevinfo.size_data = sizeof(*config);

	pdev = platform_device_register_full(&pdevinfo);
	if (IS_ERR(pdev)) {
		ret = PTR_ERR(pdev);
		pr_err("%s: Failed registering regulator %s for %s : %d\n",
				__func__, name, dev_id, ret);
		goto err_register;
	}

	return 0;

err_register:
	kfree(config->supply_name);
err_supplyname:
	kfree(config);
err_config:
	kfree(reg_data);
err_data:
	kfree(supplies);
	return ret;
}

#define MAX_STR 20

int usbhs_init_phys(struct usbhs_phy_data *phy, int num_phys)
{
	char rail_name[MAX_STR];
	int i;
	struct platform_device *pdev;
	char *phy_id;
	struct platform_device_info pdevinfo;
	struct usb_phy_generic_platform_data nop_pdata;

	for (i = 0; i < num_phys; i++) {

		if (!phy->port) {
			pr_err("%s: Invalid port 0. Must start from 1\n",
						__func__);
			continue;
		}

		/* do we need a NOP PHY device ? */
		if (!gpio_is_valid(phy->reset_gpio) &&
			!gpio_is_valid(phy->vcc_gpio))
			continue;

		phy_id = kmalloc(MAX_STR, GFP_KERNEL);
		if (!phy_id) {
			pr_err("%s: kmalloc() failed\n", __func__);
			return -ENOMEM;
		}

		/* set platform data */
		memset(&nop_pdata, 0, sizeof(nop_pdata));
		if (gpio_is_valid(phy->vcc_gpio))
			nop_pdata.needs_vcc = true;
		nop_pdata.gpio_reset = phy->reset_gpio;
		nop_pdata.type = USB_PHY_TYPE_USB2;

		/* create a NOP PHY device */
		memset(&pdevinfo, 0, sizeof(pdevinfo));
		pdevinfo.name = nop_name;
		pdevinfo.id = phy->port;
		pdevinfo.data = &nop_pdata;
		pdevinfo.size_data =
			sizeof(struct usb_phy_generic_platform_data);
		scnprintf(phy_id, MAX_STR, "usb_phy_generic.%d",
					phy->port);
		pdev = platform_device_register_full(&pdevinfo);
		if (IS_ERR(pdev)) {
			pr_err("%s: Failed to register device %s : %ld\n",
				__func__,  phy_id, PTR_ERR(pdev));
			kfree(phy_id);
			continue;
		}

		usb_bind_phy("ehci-omap.0", phy->port - 1, phy_id);

		/* Do we need VCC regulator ? */
		if (gpio_is_valid(phy->vcc_gpio)) {
			scnprintf(rail_name, MAX_STR, "hsusb%d_vcc", phy->port);
			usbhs_add_regulator(rail_name, phy_id, "vcc",
					phy->vcc_gpio, phy->vcc_polarity);
		}

		phy++;
	}

	return 0;
}