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20#include <linux/clk.h>
21#include <linux/platform_device.h>
22#include <linux/i2c.h>
23
24#include <mach/hardware.h>
25#include <asm/io.h>
26
27#include <mach/platform.h>
28#include <mach/irqs.h>
29#include <mach/gpio.h>
30
31#define USB_CTRL IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64)
32
33
34#define USB_SLAVE_HCLK_EN (1 << 24)
35#define USB_HOST_NEED_CLK_EN (1 << 21)
36
37#define USB_OTG_CLK_CTRL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF4)
38#define USB_OTG_CLK_STAT IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF8)
39
40
41#define AHB_M_CLOCK_ON (1 << 4)
42#define OTG_CLOCK_ON (1 << 3)
43#define I2C_CLOCK_ON (1 << 2)
44#define DEV_CLOCK_ON (1 << 1)
45#define HOST_CLOCK_ON (1 << 0)
46
47#define USB_OTG_STAT_CONTROL IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0x110)
48
49
50#define TRANSPARENT_I2C_EN (1 << 7)
51#define HOST_EN (1 << 0)
52
53
54#define ISP1301_MODE_CONTROL_1 0x04
55
56#define MC1_SPEED_REG (1 << 0)
57#define MC1_SUSPEND_REG (1 << 1)
58#define MC1_DAT_SE0 (1 << 2)
59#define MC1_TRANSPARENT (1 << 3)
60#define MC1_BDIS_ACON_EN (1 << 4)
61#define MC1_OE_INT_EN (1 << 5)
62#define MC1_UART_EN (1 << 6)
63#define MC1_MASK 0x7f
64
65#define ISP1301_MODE_CONTROL_2 0x12
66
67#define MC2_GLOBAL_PWR_DN (1 << 0)
68#define MC2_SPD_SUSP_CTRL (1 << 1)
69#define MC2_BI_DI (1 << 2)
70#define MC2_TRANSP_BDIR0 (1 << 3)
71#define MC2_TRANSP_BDIR1 (1 << 4)
72#define MC2_AUDIO_EN (1 << 5)
73#define MC2_PSW_EN (1 << 6)
74#define MC2_EN2V7 (1 << 7)
75
76#define ISP1301_OTG_CONTROL_1 0x06
77# define OTG1_DP_PULLUP (1 << 0)
78# define OTG1_DM_PULLUP (1 << 1)
79# define OTG1_DP_PULLDOWN (1 << 2)
80# define OTG1_DM_PULLDOWN (1 << 3)
81# define OTG1_ID_PULLDOWN (1 << 4)
82# define OTG1_VBUS_DRV (1 << 5)
83# define OTG1_VBUS_DISCHRG (1 << 6)
84# define OTG1_VBUS_CHRG (1 << 7)
85#define ISP1301_OTG_STATUS 0x10
86# define OTG_B_SESS_END (1 << 6)
87# define OTG_B_SESS_VLD (1 << 7)
88
89#define ISP1301_I2C_ADDR 0x2C
90
91#define ISP1301_I2C_MODE_CONTROL_1 0x4
92#define ISP1301_I2C_MODE_CONTROL_2 0x12
93#define ISP1301_I2C_OTG_CONTROL_1 0x6
94#define ISP1301_I2C_OTG_CONTROL_2 0x10
95#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
96#define ISP1301_I2C_INTERRUPT_LATCH 0xA
97#define ISP1301_I2C_INTERRUPT_FALLING 0xC
98#define ISP1301_I2C_INTERRUPT_RISING 0xE
99#define ISP1301_I2C_REG_CLEAR_ADDR 1
100
101static struct i2c_driver isp1301_driver;
102static struct i2c_client *isp1301_i2c_client;
103
104extern int usb_disabled(void);
105extern int ocpi_enable(void);
106
107static struct clk *usb_clk;
108
109static const unsigned short normal_i2c[] =
110 { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
111
112static int isp1301_probe(struct i2c_client *client,
113 const struct i2c_device_id *id)
114{
115 return 0;
116}
117
118static int isp1301_remove(struct i2c_client *client)
119{
120 return 0;
121}
122
123static const struct i2c_device_id isp1301_id[] = {
124 { "isp1301_pnx", 0 },
125 { }
126};
127
128static struct i2c_driver isp1301_driver = {
129 .driver = {
130 .name = "isp1301_pnx",
131 },
132 .probe = isp1301_probe,
133 .remove = isp1301_remove,
134 .id_table = isp1301_id,
135};
136
137static void i2c_write(u8 buf, u8 subaddr)
138{
139 char tmpbuf[2];
140
141 tmpbuf[0] = subaddr;
142 tmpbuf[1] = buf;
143 i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
144}
145
146static void isp1301_configure(void)
147{
148
149
150
151
152 i2c_write(MC1_DAT_SE0 | MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
153 i2c_write(~(MC1_DAT_SE0 | MC1_SPEED_REG),
154 ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
155 i2c_write(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL,
156 ISP1301_I2C_MODE_CONTROL_2);
157 i2c_write(~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL),
158 ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR);
159 i2c_write(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN,
160 ISP1301_I2C_OTG_CONTROL_1);
161 i2c_write(~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN),
162 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
163 i2c_write(0xFF,
164 ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR);
165 i2c_write(0xFF,
166 ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR);
167 i2c_write(0xFF,
168 ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR);
169
170}
171
172static inline void isp1301_vbus_on(void)
173{
174 i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1);
175}
176
177static inline void isp1301_vbus_off(void)
178{
179 i2c_write(OTG1_VBUS_DRV,
180 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
181}
182
183static void pnx4008_start_hc(void)
184{
185 unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
186 __raw_writel(tmp, USB_OTG_STAT_CONTROL);
187 isp1301_vbus_on();
188}
189
190static void pnx4008_stop_hc(void)
191{
192 unsigned long tmp;
193 isp1301_vbus_off();
194 tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
195 __raw_writel(tmp, USB_OTG_STAT_CONTROL);
196}
197
198static int __devinit ohci_pnx4008_start(struct usb_hcd *hcd)
199{
200 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
201 int ret;
202
203 if ((ret = ohci_init(ohci)) < 0)
204 return ret;
205
206 if ((ret = ohci_run(ohci)) < 0) {
207 dev_err(hcd->self.controller, "can't start\n");
208 ohci_stop(hcd);
209 return ret;
210 }
211 return 0;
212}
213
214static const struct hc_driver ohci_pnx4008_hc_driver = {
215 .description = hcd_name,
216 .product_desc = "pnx4008 OHCI",
217
218
219
220
221 .irq = ohci_irq,
222 .flags = HCD_USB11 | HCD_MEMORY,
223
224 .hcd_priv_size = sizeof(struct ohci_hcd),
225
226
227
228 .start = ohci_pnx4008_start,
229 .stop = ohci_stop,
230 .shutdown = ohci_shutdown,
231
232
233
234
235 .urb_enqueue = ohci_urb_enqueue,
236 .urb_dequeue = ohci_urb_dequeue,
237 .endpoint_disable = ohci_endpoint_disable,
238
239
240
241
242 .get_frame_number = ohci_get_frame,
243
244
245
246
247 .hub_status_data = ohci_hub_status_data,
248 .hub_control = ohci_hub_control,
249#ifdef CONFIG_PM
250 .bus_suspend = ohci_bus_suspend,
251 .bus_resume = ohci_bus_resume,
252#endif
253 .start_port_reset = ohci_start_port_reset,
254};
255
256#define USB_CLOCK_MASK (AHB_M_CLOCK_ON| OTG_CLOCK_ON | HOST_CLOCK_ON | I2C_CLOCK_ON)
257
258static void pnx4008_set_usb_bits(void)
259{
260 start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
261 start_int_ack(SE_USB_OTG_ATX_INT_N);
262 start_int_umask(SE_USB_OTG_ATX_INT_N);
263
264 start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
265 start_int_ack(SE_USB_OTG_TIMER_INT);
266 start_int_umask(SE_USB_OTG_TIMER_INT);
267
268 start_int_set_rising_edge(SE_USB_I2C_INT);
269 start_int_ack(SE_USB_I2C_INT);
270 start_int_umask(SE_USB_I2C_INT);
271
272 start_int_set_rising_edge(SE_USB_INT);
273 start_int_ack(SE_USB_INT);
274 start_int_umask(SE_USB_INT);
275
276 start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
277 start_int_ack(SE_USB_NEED_CLK_INT);
278 start_int_umask(SE_USB_NEED_CLK_INT);
279
280 start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
281 start_int_ack(SE_USB_AHB_NEED_CLK_INT);
282 start_int_umask(SE_USB_AHB_NEED_CLK_INT);
283}
284
285static void pnx4008_unset_usb_bits(void)
286{
287 start_int_mask(SE_USB_OTG_ATX_INT_N);
288 start_int_mask(SE_USB_OTG_TIMER_INT);
289 start_int_mask(SE_USB_I2C_INT);
290 start_int_mask(SE_USB_INT);
291 start_int_mask(SE_USB_NEED_CLK_INT);
292 start_int_mask(SE_USB_AHB_NEED_CLK_INT);
293}
294
295static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
296{
297 struct usb_hcd *hcd = 0;
298 struct ohci_hcd *ohci;
299 const struct hc_driver *driver = &ohci_pnx4008_hc_driver;
300 struct i2c_adapter *i2c_adap;
301 struct i2c_board_info i2c_info;
302
303 int ret = 0, irq;
304
305 dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (pnx4008)\n", hcd_name);
306 if (usb_disabled()) {
307 err("USB is disabled");
308 ret = -ENODEV;
309 goto out;
310 }
311
312 if (pdev->num_resources != 2
313 || pdev->resource[0].flags != IORESOURCE_MEM
314 || pdev->resource[1].flags != IORESOURCE_IRQ) {
315 err("Invalid resource configuration");
316 ret = -ENODEV;
317 goto out;
318 }
319
320
321 __raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
322
323 ret = i2c_add_driver(&isp1301_driver);
324 if (ret < 0) {
325 err("failed to add ISP1301 driver");
326 goto out;
327 }
328 i2c_adap = i2c_get_adapter(2);
329 memset(&i2c_info, 0, sizeof(struct i2c_board_info));
330 strlcpy(i2c_info.type, "isp1301_pnx", I2C_NAME_SIZE);
331 isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info,
332 normal_i2c, NULL);
333 i2c_put_adapter(i2c_adap);
334 if (!isp1301_i2c_client) {
335 err("failed to connect I2C to ISP1301 USB Transceiver");
336 ret = -ENODEV;
337 goto out_i2c_driver;
338 }
339
340 isp1301_configure();
341
342
343 usb_clk = clk_get(&pdev->dev, "ck_pll5");
344 if (IS_ERR(usb_clk)) {
345 err("failed to acquire USB PLL");
346 ret = PTR_ERR(usb_clk);
347 goto out1;
348 }
349
350 ret = clk_enable(usb_clk);
351 if (ret < 0) {
352 err("failed to start USB PLL");
353 goto out2;
354 }
355
356 ret = clk_set_rate(usb_clk, 48000);
357 if (ret < 0) {
358 err("failed to set USB clock rate");
359 goto out3;
360 }
361
362 __raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
363
364
365 __raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
366
367 while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
368 USB_CLOCK_MASK) ;
369
370 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
371 if (!hcd) {
372 err("Failed to allocate HC buffer");
373 ret = -ENOMEM;
374 goto out3;
375 }
376
377
378 pnx4008_set_usb_bits();
379
380 hcd->rsrc_start = pdev->resource[0].start;
381 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
382 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
383 dev_dbg(&pdev->dev, "request_mem_region failed\n");
384 ret = -ENOMEM;
385 goto out4;
386 }
387 hcd->regs = (void __iomem *)pdev->resource[0].start;
388
389 irq = platform_get_irq(pdev, 0);
390 if (irq < 0) {
391 ret = -ENXIO;
392 goto out4;
393 }
394
395 pnx4008_start_hc();
396 platform_set_drvdata(pdev, hcd);
397 ohci = hcd_to_ohci(hcd);
398 ohci_hcd_init(ohci);
399
400 dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
401 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
402 if (ret == 0)
403 return ret;
404
405 pnx4008_stop_hc();
406out4:
407 pnx4008_unset_usb_bits();
408 usb_put_hcd(hcd);
409out3:
410 clk_disable(usb_clk);
411out2:
412 clk_put(usb_clk);
413out1:
414 i2c_unregister_device(isp1301_i2c_client);
415 isp1301_i2c_client = NULL;
416out_i2c_driver:
417 i2c_del_driver(&isp1301_driver);
418out:
419 return ret;
420}
421
422static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
423{
424 struct usb_hcd *hcd = platform_get_drvdata(pdev);
425
426 usb_remove_hcd(hcd);
427 pnx4008_stop_hc();
428 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
429 usb_put_hcd(hcd);
430 pnx4008_unset_usb_bits();
431 clk_disable(usb_clk);
432 clk_put(usb_clk);
433 i2c_unregister_device(isp1301_i2c_client);
434 isp1301_i2c_client = NULL;
435 i2c_del_driver(&isp1301_driver);
436
437 platform_set_drvdata(pdev, NULL);
438
439 return 0;
440}
441
442
443MODULE_ALIAS("platform:usb-ohci");
444
445static struct platform_driver usb_hcd_pnx4008_driver = {
446 .driver = {
447 .name = "usb-ohci",
448 .owner = THIS_MODULE,
449 },
450 .probe = usb_hcd_pnx4008_probe,
451 .remove = usb_hcd_pnx4008_remove,
452};
453
454
