summaryrefslogtreecommitdiff
path: root/drivers/usb/host/ohci-nxp.c
blob: 119966603d8d06c6a6890ccf799418225ed26384 (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
/*
 * driver for NXP USB Host devices
 *
 * Currently supported OHCI host devices:
 * - NXP LPC32xx
 *
 * Authors: Dmitry Chigirev <source@mvista.com>
 *	    Vitaly Wool <vitalywool@gmail.com>
 *
 * register initialization is based on code examples provided by Philips
 * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
 *
 * NOTE: This driver does not have suspend/resume functionality
 * This driver is intended for engineering development purposes only
 *
 * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/usb/isp1301.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/io.h>

#include <mach/platform.h>
#include <mach/irqs.h>

#define USB_CONFIG_BASE		0x31020000
#define PWRMAN_BASE		0x40004000

#define USB_CTRL		IO_ADDRESS(PWRMAN_BASE + 0x64)

/* USB_CTRL bit defines */
#define USB_SLAVE_HCLK_EN	(1 << 24)
#define USB_DEV_NEED_CLK_EN	(1 << 22)
#define USB_HOST_NEED_CLK_EN	(1 << 21)
#define PAD_CONTROL_LAST_DRIVEN	(1 << 19)

#define USB_OTG_STAT_CONTROL	IO_ADDRESS(USB_CONFIG_BASE + 0x110)

/* USB_OTG_STAT_CONTROL bit defines */
#define TRANSPARENT_I2C_EN	(1 << 7)
#define HOST_EN			(1 << 0)

/* On LPC32xx, those are undefined */
#ifndef start_int_set_falling_edge
#define start_int_set_falling_edge(irq)
#define start_int_set_rising_edge(irq)
#define start_int_ack(irq)
#define start_int_mask(irq)
#define start_int_umask(irq)
#endif

static struct i2c_client *isp1301_i2c_client;

extern int usb_disabled(void);

static struct clk *usb_pll_clk;
static struct clk *usb_dev_clk;
static struct clk *usb_otg_clk;

static void isp1301_configure_lpc32xx(void)
{
	/* LPC32XX only supports DAT_SE0 USB mode */
	/* This sequence is important */

	/* Disable transparent UART mode first */
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		MC1_UART_EN);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		~MC1_SPEED_REG);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
				  ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		  (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
		  ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_MODE_CONTROL_2,
		(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_OTG_CONTROL_1,
		(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		(OTG1_DM_PULLUP | OTG1_DP_PULLUP));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
		~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);

	/* Enable usb_need_clk clock after transceiver is initialized */
	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);

	printk(KERN_INFO "ISP1301 Vendor ID  : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
}

static void isp1301_configure(void)
{
	isp1301_configure_lpc32xx();
}

static inline void isp1301_vbus_on(void)
{
	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
				  OTG1_VBUS_DRV);
}

static inline void isp1301_vbus_off(void)
{
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
		OTG1_VBUS_DRV);
}

static void nxp_start_hc(void)
{
	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	isp1301_vbus_on();
}

static void nxp_stop_hc(void)
{
	unsigned long tmp;
	isp1301_vbus_off();
	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
}

static int __devinit ohci_nxp_start(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int ret;

	if ((ret = ohci_init(ohci)) < 0)
		return ret;

	if ((ret = ohci_run(ohci)) < 0) {
		dev_err(hcd->self.controller, "can't start\n");
		ohci_stop(hcd);
		return ret;
	}
	return 0;
}

static const struct hc_driver ohci_nxp_hc_driver = {
	.description = hcd_name,
	.product_desc =		"nxp OHCI",

	/*
	 * generic hardware linkage
	 */
	.irq = ohci_irq,
	.flags = HCD_USB11 | HCD_MEMORY,

	.hcd_priv_size =	sizeof(struct ohci_hcd),
	/*
	 * basic lifecycle operations
	 */
	.start = ohci_nxp_start,
	.stop = ohci_stop,
	.shutdown = ohci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue = ohci_urb_enqueue,
	.urb_dequeue = ohci_urb_dequeue,
	.endpoint_disable = ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number = ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data = ohci_hub_status_data,
	.hub_control = ohci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend = ohci_bus_suspend,
	.bus_resume = ohci_bus_resume,
#endif
	.start_port_reset = ohci_start_port_reset,
};

static int __devinit usb_hcd_nxp_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	struct ohci_hcd *ohci;
	const struct hc_driver *driver = &ohci_nxp_hc_driver;
	struct resource *res;
	int ret = 0, irq;
	struct device_node *isp1301_node;

	if (pdev->dev.of_node) {
		isp1301_node = of_parse_phandle(pdev->dev.of_node,
						"transceiver", 0);
	} else {
		isp1301_node = NULL;
	}

	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	if (!isp1301_i2c_client) {
		ret = -EPROBE_DEFER;
		goto out;
	}

	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;

	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
	if (usb_disabled()) {
		dev_err(&pdev->dev, "USB is disabled\n");
		ret = -ENODEV;
		goto out;
	}

	/* Enable AHB slave USB clock, needed for further USB clock control */
	__raw_writel(USB_SLAVE_HCLK_EN | PAD_CONTROL_LAST_DRIVEN, USB_CTRL);

	/* Enable USB PLL */
	usb_pll_clk = clk_get(&pdev->dev, "ck_pll5");
	if (IS_ERR(usb_pll_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB PLL\n");
		ret = PTR_ERR(usb_pll_clk);
		goto out1;
	}

	ret = clk_enable(usb_pll_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB PLL\n");
		goto out2;
	}

	ret = clk_set_rate(usb_pll_clk, 48000);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to set USB clock rate\n");
		goto out3;
	}

	/* Enable USB device clock */
	usb_dev_clk = clk_get(&pdev->dev, "ck_usbd");
	if (IS_ERR(usb_dev_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
		ret = PTR_ERR(usb_dev_clk);
		goto out4;
	}

	ret = clk_enable(usb_dev_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto out5;
	}

	/* Enable USB otg clocks */
	usb_otg_clk = clk_get(&pdev->dev, "ck_usb_otg");
	if (IS_ERR(usb_otg_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
		ret = PTR_ERR(usb_dev_clk);
		goto out6;
	}

	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);

	ret = clk_enable(usb_otg_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto out7;
	}

	isp1301_configure();

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
		ret = -ENOMEM;
		goto out8;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Failed to get MEM resource\n");
		ret =  -ENOMEM;
		goto out8;
	}

	hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
	if (!hcd->regs) {
		dev_err(&pdev->dev, "Failed to devm_request_and_ioremap\n");
		ret =  -ENOMEM;
		goto out8;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENXIO;
		goto out8;
	}

	nxp_start_hc();
	platform_set_drvdata(pdev, hcd);
	ohci = hcd_to_ohci(hcd);
	ohci_hcd_init(ohci);

	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
	ret = usb_add_hcd(hcd, irq, 0);
	if (ret == 0)
		return ret;

	nxp_stop_hc();
out8:
	usb_put_hcd(hcd);
out7:
	clk_disable(usb_otg_clk);
out6:
	clk_put(usb_otg_clk);
out5:
	clk_disable(usb_dev_clk);
out4:
	clk_put(usb_dev_clk);
out3:
	clk_disable(usb_pll_clk);
out2:
	clk_put(usb_pll_clk);
out1:
	isp1301_i2c_client = NULL;
out:
	return ret;
}

static int usb_hcd_nxp_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	nxp_stop_hc();
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	clk_disable(usb_pll_clk);
	clk_put(usb_pll_clk);
	clk_disable(usb_dev_clk);
	clk_put(usb_dev_clk);
	i2c_unregister_device(isp1301_i2c_client);
	isp1301_i2c_client = NULL;

	platform_set_drvdata(pdev, NULL);

	return 0;
}

/* work with hotplug and coldplug */
MODULE_ALIAS("platform:usb-ohci");

#ifdef CONFIG_OF
static const struct of_device_id usb_hcd_nxp_match[] = {
	{ .compatible = "nxp,ohci-nxp" },
	{},
};
MODULE_DEVICE_TABLE(of, usb_hcd_nxp_match);
#endif

static struct platform_driver usb_hcd_nxp_driver = {
	.driver = {
		.name = "usb-ohci",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(usb_hcd_nxp_match),
	},
	.probe = usb_hcd_nxp_probe,
	.remove = usb_hcd_nxp_remove,
};