aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-omap2/usb-fs.c
blob: a216d88b04b5c4f0690a7c32b514084b78590800 (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
/*
 * Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
 *
 * Copyright (C) 2004 Texas Instruments, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>

#include <asm/irq.h>

#include <plat/control.h>
#include <plat/usb.h>
#include <plat/board.h>

#define INT_USB_IRQ_GEN		INT_24XX_USB_IRQ_GEN
#define INT_USB_IRQ_NISO	INT_24XX_USB_IRQ_NISO
#define INT_USB_IRQ_ISO		INT_24XX_USB_IRQ_ISO
#define INT_USB_IRQ_HGEN	INT_24XX_USB_IRQ_HGEN
#define INT_USB_IRQ_OTG		INT_24XX_USB_IRQ_OTG

#include "mux.h"

#if defined(CONFIG_ARCH_OMAP2)

#ifdef	CONFIG_USB_GADGET_OMAP

static struct resource udc_resources[] = {
	/* order is significant! */
	{		/* registers */
		.start		= UDC_BASE,
		.end		= UDC_BASE + 0xff,
		.flags		= IORESOURCE_MEM,
	}, {		/* general IRQ */
		.start		= INT_USB_IRQ_GEN,
		.flags		= IORESOURCE_IRQ,
	}, {		/* PIO IRQ */
		.start		= INT_USB_IRQ_NISO,
		.flags		= IORESOURCE_IRQ,
	}, {		/* SOF IRQ */
		.start		= INT_USB_IRQ_ISO,
		.flags		= IORESOURCE_IRQ,
	},
};

static u64 udc_dmamask = ~(u32)0;

static struct platform_device udc_device = {
	.name		= "omap_udc",
	.id		= -1,
	.dev = {
		.dma_mask		= &udc_dmamask,
		.coherent_dma_mask	= 0xffffffff,
	},
	.num_resources	= ARRAY_SIZE(udc_resources),
	.resource	= udc_resources,
};

static inline void udc_device_init(struct omap_usb_config *pdata)
{
	pdata->udc_device = &udc_device;
}

#else

static inline void udc_device_init(struct omap_usb_config *pdata)
{
}

#endif

#if	defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)

/* The dmamask must be set for OHCI to work */
static u64 ohci_dmamask = ~(u32)0;

static struct resource ohci_resources[] = {
	{
		.start	= OMAP_OHCI_BASE,
		.end	= OMAP_OHCI_BASE + 0xff,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= INT_USB_IRQ_HGEN,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device ohci_device = {
	.name			= "ohci",
	.id			= -1,
	.dev = {
		.dma_mask		= &ohci_dmamask,
		.coherent_dma_mask	= 0xffffffff,
	},
	.num_resources	= ARRAY_SIZE(ohci_resources),
	.resource		= ohci_resources,
};

static inline void ohci_device_init(struct omap_usb_config *pdata)
{
	pdata->ohci_device = &ohci_device;
}

#else

static inline void ohci_device_init(struct omap_usb_config *pdata)
{
}

#endif

#if	defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)

static struct resource otg_resources[] = {
	/* order is significant! */
	{
		.start		= OTG_BASE,
		.end		= OTG_BASE + 0xff,
		.flags		= IORESOURCE_MEM,
	}, {
		.start		= INT_USB_IRQ_OTG,
		.flags		= IORESOURCE_IRQ,
	},
};

static struct platform_device otg_device = {
	.name		= "omap_otg",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(otg_resources),
	.resource	= otg_resources,
};

static inline void otg_device_init(struct omap_usb_config *pdata)
{
	pdata->otg_device = &otg_device;
}

#else

static inline void otg_device_init(struct omap_usb_config *pdata)
{
}

#endif

static void omap2_usb_devconf_clear(u8 port, u32 mask)
{
	u32 r;

	r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	r &= ~USBTXWRMODEI(port, mask);
	omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
}

static void omap2_usb_devconf_set(u8 port, u32 mask)
{
	u32 r;

	r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	r |= USBTXWRMODEI(port, mask);
	omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
}

static void omap2_usb2_disable_5pinbitll(void)
{
	u32 r;

	r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	r &= ~(USBTXWRMODEI(2, USB_BIDIR_TLL) | USBT2TLL5PI);
	omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
}

static void omap2_usb2_enable_5pinunitll(void)
{
	u32 r;

	r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	r |= USBTXWRMODEI(2, USB_UNIDIR_TLL) | USBT2TLL5PI;
	omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
}

static u32 __init omap2_usb0_init(unsigned nwires, unsigned is_device)
{
	u32	syscon1 = 0;

	omap2_usb_devconf_clear(0, USB_BIDIR_TLL);

	if (nwires == 0)
		return 0;

	if (is_device)
		omap_mux_init_signal("usb0_puen", 0);

	omap_mux_init_signal("usb0_dat", 0);
	omap_mux_init_signal("usb0_txen", 0);
	omap_mux_init_signal("usb0_se0", 0);
	if (nwires != 3)
		omap_mux_init_signal("usb0_rcv", 0);

	switch (nwires) {
	case 3:
		syscon1 = 2;
		omap2_usb_devconf_set(0, USB_BIDIR);
		break;
	case 4:
		syscon1 = 1;
		omap2_usb_devconf_set(0, USB_BIDIR);
		break;
	case 6:
		syscon1 = 3;
		omap_mux_init_signal("usb0_vp", 0);
		omap_mux_init_signal("usb0_vm", 0);
		omap2_usb_devconf_set(0, USB_UNIDIR);
		break;
	default:
		printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
			0, nwires);
	}

	return syscon1 << 16;
}

static u32 __init omap2_usb1_init(unsigned nwires)
{
	u32	syscon1 = 0;

	omap2_usb_devconf_clear(1, USB_BIDIR_TLL);

	if (nwires == 0)
		return 0;

	/* NOTE:  board-specific code must set up pin muxing for usb1,
	 * since each signal could come out on either of two balls.
	 */

	switch (nwires) {
	case 2:
		/* NOTE: board-specific code must override this setting if
		 * this TLL link is not using DP/DM
		 */
		syscon1 = 1;
		omap2_usb_devconf_set(1, USB_BIDIR_TLL);
		break;
	case 3:
		syscon1 = 2;
		omap2_usb_devconf_set(1, USB_BIDIR);
		break;
	case 4:
		syscon1 = 1;
		omap2_usb_devconf_set(1, USB_BIDIR);
		break;
	case 6:
	default:
		printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
			1, nwires);
	}

	return syscon1 << 20;
}

static u32 __init omap2_usb2_init(unsigned nwires, unsigned alt_pingroup)
{
	u32	syscon1 = 0;

	omap2_usb2_disable_5pinbitll();
	alt_pingroup = 0;

	/* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
	if (alt_pingroup || nwires == 0)
		return 0;

	omap_mux_init_signal("usb2_dat", 0);
	omap_mux_init_signal("usb2_se0", 0);
	if (nwires > 2)
		omap_mux_init_signal("usb2_txen", 0);
	if (nwires > 3)
		omap_mux_init_signal("usb2_rcv", 0);

	switch (nwires) {
	case 2:
		/* NOTE: board-specific code must override this setting if
		 * this TLL link is not using DP/DM
		 */
		syscon1 = 1;
		omap2_usb_devconf_set(2, USB_BIDIR_TLL);
		break;
	case 3:
		syscon1 = 2;
		omap2_usb_devconf_set(2, USB_BIDIR);
		break;
	case 4:
		syscon1 = 1;
		omap2_usb_devconf_set(2, USB_BIDIR);
		break;
	case 5:
		/* NOTE: board-specific code must mux this setting depending
		 * on TLL link using DP/DM.  Something must also
		 * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
		 * 2420: hdq_sio.usb2_tllse0 or vlynq_rx0.usb2_tllse0
		 * 2430: hdq_sio.usb2_tllse0 or sdmmc2_dat0.usb2_tllse0
		 */

		syscon1 = 3;
		omap2_usb2_enable_5pinunitll();
		break;
	case 6:
	default:
		printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
			2, nwires);
	}

	return syscon1 << 24;
}

void __init omap2_usbfs_init(struct omap_usb_config *pdata)
{
	struct clk *ick;

	if (!cpu_is_omap24xx())
		return;

	ick = clk_get(NULL, "usb_l4_ick");
	if (IS_ERR(ick))
		return;

	clk_enable(ick);
	pdata->usb0_init = omap2_usb0_init;
	pdata->usb1_init = omap2_usb1_init;
	pdata->usb2_init = omap2_usb2_init;
	udc_device_init(pdata);
	ohci_device_init(pdata);
	otg_device_init(pdata);
	omap_otg_init(pdata);
	clk_disable(ick);
	clk_put(ick);
}

#endif