summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/fsl-mph-dr-of.c
blob: 574b99ea07009a2467daa902d997a58c1b8657e9 (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
/*
 * Setup platform devices needed by the Freescale multi-port host
 * and/or dual-role USB controller modules based on the description
 * in flat device tree.
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/clk.h>

struct fsl_usb2_dev_data {
	char *dr_mode;		/* controller mode */
	char *drivers[3];	/* drivers to instantiate for this mode */
	enum fsl_usb2_operating_modes op_mode;	/* operating mode */
};

struct fsl_usb2_dev_data dr_mode_data[] __devinitdata = {
	{
		.dr_mode = "host",
		.drivers = { "fsl-ehci", NULL, NULL, },
		.op_mode = FSL_USB2_DR_HOST,
	},
	{
		.dr_mode = "otg",
		.drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
		.op_mode = FSL_USB2_DR_OTG,
	},
	{
		.dr_mode = "peripheral",
		.drivers = { "fsl-usb2-udc", NULL, NULL, },
		.op_mode = FSL_USB2_DR_DEVICE,
	},
};

struct fsl_usb2_dev_data * __devinit get_dr_mode_data(struct device_node *np)
{
	const unsigned char *prop;
	int i;

	prop = of_get_property(np, "dr_mode", NULL);
	if (prop) {
		for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
			if (!strcmp(prop, dr_mode_data[i].dr_mode))
				return &dr_mode_data[i];
		}
	}
	pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
		np->full_name);
	return &dr_mode_data[0]; /* mode not specified, use host */
}

static enum fsl_usb2_phy_modes __devinit determine_usb_phy(const char *phy_type)
{
	if (!phy_type)
		return FSL_USB2_PHY_NONE;
	if (!strcasecmp(phy_type, "ulpi"))
		return FSL_USB2_PHY_ULPI;
	if (!strcasecmp(phy_type, "utmi"))
		return FSL_USB2_PHY_UTMI;
	if (!strcasecmp(phy_type, "utmi_wide"))
		return FSL_USB2_PHY_UTMI_WIDE;
	if (!strcasecmp(phy_type, "serial"))
		return FSL_USB2_PHY_SERIAL;

	return FSL_USB2_PHY_NONE;
}

struct platform_device * __devinit fsl_usb2_device_register(
					struct platform_device *ofdev,
					struct fsl_usb2_platform_data *pdata,
					const char *name, int id)
{
	struct platform_device *pdev;
	const struct resource *res = ofdev->resource;
	unsigned int num = ofdev->num_resources;
	int retval;

	pdev = platform_device_alloc(name, id);
	if (!pdev) {
		retval = -ENOMEM;
		goto error;
	}

	pdev->dev.parent = &ofdev->dev;

	pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
	pdev->dev.dma_mask = &pdev->archdata.dma_mask;
	*pdev->dev.dma_mask = *ofdev->dev.dma_mask;

	retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
	if (retval)
		goto error;

	if (num) {
		retval = platform_device_add_resources(pdev, res, num);
		if (retval)
			goto error;
	}

	retval = platform_device_add(pdev);
	if (retval)
		goto error;

	return pdev;

error:
	platform_device_put(pdev);
	return ERR_PTR(retval);
}

static const struct of_device_id fsl_usb2_mph_dr_of_match[];

static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
{
	struct device_node *np = ofdev->dev.of_node;
	struct platform_device *usb_dev;
	struct fsl_usb2_platform_data data, *pdata;
	struct fsl_usb2_dev_data *dev_data;
	const struct of_device_id *match;
	const unsigned char *prop;
	static unsigned int idx;
	int i;

	if (!of_device_is_available(np))
		return -ENODEV;

	match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
	if (!match)
		return -ENODEV;

	pdata = &data;
	if (match->data)
		memcpy(pdata, match->data, sizeof(data));
	else
		memset(pdata, 0, sizeof(data));

	dev_data = get_dr_mode_data(np);

	if (of_device_is_compatible(np, "fsl-usb2-mph")) {
		if (of_get_property(np, "port0", NULL))
			pdata->port_enables |= FSL_USB2_PORT0_ENABLED;

		if (of_get_property(np, "port1", NULL))
			pdata->port_enables |= FSL_USB2_PORT1_ENABLED;

		pdata->operating_mode = FSL_USB2_MPH_HOST;
	} else {
		if (of_get_property(np, "fsl,invert-drvvbus", NULL))
			pdata->invert_drvvbus = 1;

		if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
			pdata->invert_pwr_fault = 1;

		/* setup mode selected in the device tree */
		pdata->operating_mode = dev_data->op_mode;
	}

	prop = of_get_property(np, "phy_type", NULL);
	pdata->phy_mode = determine_usb_phy(prop);

	for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
		if (!dev_data->drivers[i])
			continue;
		usb_dev = fsl_usb2_device_register(ofdev, pdata,
					dev_data->drivers[i], idx);
		if (IS_ERR(usb_dev)) {
			dev_err(&ofdev->dev, "Can't register usb device\n");
			return PTR_ERR(usb_dev);
		}
	}
	idx++;
	return 0;
}

static int __devexit __unregister_subdev(struct device *dev, void *d)
{
	platform_device_unregister(to_platform_device(dev));
	return 0;
}

static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
{
	device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
	return 0;
}

#ifdef CONFIG_PPC_MPC512x

#define USBGENCTRL		0x200		/* NOTE: big endian */
#define GC_WU_INT_CLR		(1 << 5)	/* Wakeup int clear */
#define GC_ULPI_SEL		(1 << 4)	/* ULPI i/f select (usb0 only)*/
#define GC_PPP			(1 << 3)	/* Inv. Port Power Polarity */
#define GC_PFP			(1 << 2)	/* Inv. Power Fault Polarity */
#define GC_WU_ULPI_EN		(1 << 1)	/* Wakeup on ULPI event */
#define GC_WU_IE		(1 << 1)	/* Wakeup interrupt enable */

#define ISIPHYCTRL		0x204		/* NOTE: big endian */
#define PHYCTRL_PHYE		(1 << 4)	/* On-chip UTMI PHY enable */
#define PHYCTRL_BSENH		(1 << 3)	/* Bit Stuff Enable High */
#define PHYCTRL_BSEN		(1 << 2)	/* Bit Stuff Enable */
#define PHYCTRL_LSFE		(1 << 1)	/* Line State Filter Enable */
#define PHYCTRL_PXE		(1 << 0)	/* PHY oscillator enable */

int fsl_usb2_mpc5121_init(struct platform_device *pdev)
{
	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
	struct clk *clk;
	char clk_name[10];
	int base, clk_num;

	base = pdev->resource->start & 0xf000;
	if (base == 0x3000)
		clk_num = 1;
	else if (base == 0x4000)
		clk_num = 2;
	else
		return -ENODEV;

	snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
	clk = clk_get(&pdev->dev, clk_name);
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "failed to get clk\n");
		return PTR_ERR(clk);
	}

	clk_enable(clk);
	pdata->clk = clk;

	if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
		u32 reg = 0;

		if (pdata->invert_drvvbus)
			reg |= GC_PPP;

		if (pdata->invert_pwr_fault)
			reg |= GC_PFP;

		out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
		out_be32(pdata->regs + USBGENCTRL, reg);
	}
	return 0;
}

static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
{
	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;

	pdata->regs = NULL;

	if (pdata->clk) {
		clk_disable(pdata->clk);
		clk_put(pdata->clk);
	}
}

struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
	.big_endian_desc = 1,
	.big_endian_mmio = 1,
	.es = 1,
	.le_setup_buf = 1,
	.init = fsl_usb2_mpc5121_init,
	.exit = fsl_usb2_mpc5121_exit,
};
#endif /* CONFIG_PPC_MPC512x */

static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
	{ .compatible = "fsl-usb2-mph", },
	{ .compatible = "fsl-usb2-dr", },
#ifdef CONFIG_PPC_MPC512x
	{ .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
#endif
	{},
};

static struct platform_driver fsl_usb2_mph_dr_driver = {
	.driver = {
		.name = "fsl-usb2-mph-dr",
		.owner = THIS_MODULE,
		.of_match_table = fsl_usb2_mph_dr_of_match,
	},
	.probe	= fsl_usb2_mph_dr_of_probe,
	.remove	= __devexit_p(fsl_usb2_mph_dr_of_remove),
};

static int __init fsl_usb2_mph_dr_init(void)
{
	return platform_driver_register(&fsl_usb2_mph_dr_driver);
}
module_init(fsl_usb2_mph_dr_init);

static void __exit fsl_usb2_mph_dr_exit(void)
{
	platform_driver_unregister(&fsl_usb2_mph_dr_driver);
}
module_exit(fsl_usb2_mph_dr_exit);

MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud