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1 /*
2  * Copyright 2005-2009 MontaVista Software, Inc.
3  * Copyright 2008      Freescale Semiconductor, Inc.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the
7  * Free Software Foundation; either version 2 of the License, or (at your
8  * option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  * for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software Foundation,
17  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  *
19  * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
20  * by Hunter Wu.
21  * Power Management support by Dave Liu <daveliu@freescale.com>,
22  * Jerry Huang <Chang-Ming.Huang@freescale.com> and
23  * Anton Vorontsov <avorontsov@ru.mvista.com>.
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/platform_device.h>
31 #include <linux/fsl_devices.h>
32
33 #include "ehci-fsl.h"
34
35 /* configure so an HC device and id are always provided */
36 /* always called with process context; sleeping is OK */
37
38 /**
39  * usb_hcd_fsl_probe - initialize FSL-based HCDs
40  * @drvier: Driver to be used for this HCD
41  * @pdev: USB Host Controller being probed
42  * Context: !in_interrupt()
43  *
44  * Allocates basic resources for this USB host controller.
45  *
46  */
47 static int usb_hcd_fsl_probe(const struct hc_driver *driver,
48                              struct platform_device *pdev)
49 {
50         struct fsl_usb2_platform_data *pdata;
51         struct usb_hcd *hcd;
52         struct resource *res;
53         int irq;
54         int retval;
55         unsigned int temp;
56
57         pr_debug("initializing FSL-SOC USB Controller\n");
58
59         /* Need platform data for setup */
60         pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
61         if (!pdata) {
62                 dev_err(&pdev->dev,
63                         "No platform data for %s.\n", dev_name(&pdev->dev));
64                 return -ENODEV;
65         }
66
67         /*
68          * This is a host mode driver, verify that we're supposed to be
69          * in host mode.
70          */
71         if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
72               (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
73               (pdata->operating_mode == FSL_USB2_DR_OTG))) {
74                 dev_err(&pdev->dev,
75                         "Non Host Mode configured for %s. Wrong driver linked.\n",
76                         dev_name(&pdev->dev));
77                 return -ENODEV;
78         }
79
80         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
81         if (!res) {
82                 dev_err(&pdev->dev,
83                         "Found HC with no IRQ. Check %s setup!\n",
84                         dev_name(&pdev->dev));
85                 return -ENODEV;
86         }
87         irq = res->start;
88
89         hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
90         if (!hcd) {
91                 retval = -ENOMEM;
92                 goto err1;
93         }
94
95         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
96         if (!res) {
97                 dev_err(&pdev->dev,
98                         "Found HC with no register addr. Check %s setup!\n",
99                         dev_name(&pdev->dev));
100                 retval = -ENODEV;
101                 goto err2;
102         }
103         hcd->rsrc_start = res->start;
104         hcd->rsrc_len = res->end - res->start + 1;
105         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
106                                 driver->description)) {
107                 dev_dbg(&pdev->dev, "controller already in use\n");
108                 retval = -EBUSY;
109                 goto err2;
110         }
111         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
112
113         if (hcd->regs == NULL) {
114                 dev_dbg(&pdev->dev, "error mapping memory\n");
115                 retval = -EFAULT;
116                 goto err3;
117         }
118
119         pdata->regs = hcd->regs;
120
121         /*
122          * do platform specific init: check the clock, grab/config pins, etc.
123          */
124         if (pdata->init && pdata->init(pdev)) {
125                 retval = -ENODEV;
126                 goto err3;
127         }
128
129         /*
130          * Check if it is MPC5121 SoC, otherwise set pdata->have_sysif_regs
131          * flag for 83xx or 8536 system interface registers.
132          */
133         if (pdata->big_endian_mmio)
134                 temp = in_be32(hcd->regs + FSL_SOC_USB_ID);
135         else
136                 temp = in_le32(hcd->regs + FSL_SOC_USB_ID);
137
138         if ((temp & ID_MSK) != (~((temp & NID_MSK) >> 8) & ID_MSK))
139                 pdata->have_sysif_regs = 1;
140
141         /* Enable USB controller, 83xx or 8536 */
142         if (pdata->have_sysif_regs)
143                 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
144
145         /* Don't need to set host mode here. It will be done by tdi_reset() */
146
147         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
148         if (retval != 0)
149                 goto err4;
150         return retval;
151
152       err4:
153         iounmap(hcd->regs);
154       err3:
155         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
156       err2:
157         usb_put_hcd(hcd);
158       err1:
159         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
160         if (pdata->exit)
161                 pdata->exit(pdev);
162         return retval;
163 }
164
165 /* may be called without controller electrically present */
166 /* may be called with controller, bus, and devices active */
167
168 /**
169  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
170  * @dev: USB Host Controller being removed
171  * Context: !in_interrupt()
172  *
173  * Reverses the effect of usb_hcd_fsl_probe().
174  *
175  */
176 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
177                                struct platform_device *pdev)
178 {
179         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
180
181         usb_remove_hcd(hcd);
182
183         /*
184          * do platform specific un-initialization:
185          * release iomux pins, disable clock, etc.
186          */
187         if (pdata->exit)
188                 pdata->exit(pdev);
189         iounmap(hcd->regs);
190         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
191         usb_put_hcd(hcd);
192 }
193
194 static void ehci_fsl_setup_phy(struct ehci_hcd *ehci,
195                                enum fsl_usb2_phy_modes phy_mode,
196                                unsigned int port_offset)
197 {
198         u32 portsc;
199
200         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
201         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
202
203         switch (phy_mode) {
204         case FSL_USB2_PHY_ULPI:
205                 portsc |= PORT_PTS_ULPI;
206                 break;
207         case FSL_USB2_PHY_SERIAL:
208                 portsc |= PORT_PTS_SERIAL;
209                 break;
210         case FSL_USB2_PHY_UTMI_WIDE:
211                 portsc |= PORT_PTS_PTW;
212                 /* fall through */
213         case FSL_USB2_PHY_UTMI:
214                 portsc |= PORT_PTS_UTMI;
215                 break;
216         case FSL_USB2_PHY_NONE:
217                 break;
218         }
219         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
220 }
221
222 static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
223 {
224         struct usb_hcd *hcd = ehci_to_hcd(ehci);
225         struct fsl_usb2_platform_data *pdata;
226         void __iomem *non_ehci = hcd->regs;
227         u32 temp;
228
229         pdata = hcd->self.controller->platform_data;
230
231         /* Enable PHY interface in the control reg. */
232         if (pdata->have_sysif_regs) {
233                 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
234                 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
235                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
236         }
237
238 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
239         /*
240          * Turn on cache snooping hardware, since some PowerPC platforms
241          * wholly rely on hardware to deal with cache coherent
242          */
243
244         /* Setup Snooping for all the 4GB space */
245         /* SNOOP1 starts from 0x0, size 2G */
246         out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
247         /* SNOOP2 starts from 0x80000000, size 2G */
248         out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
249 #endif
250
251         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
252                         (pdata->operating_mode == FSL_USB2_DR_OTG))
253                 ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
254
255         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
256                 unsigned int chip, rev, svr;
257
258                 svr = mfspr(SPRN_SVR);
259                 chip = svr >> 16;
260                 rev = (svr >> 4) & 0xf;
261
262                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
263                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
264                         ehci->has_fsl_port_bug = 1;
265
266                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
267                         ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
268                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
269                         ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1);
270         }
271
272         if (pdata->have_sysif_regs) {
273 #ifdef CONFIG_PPC_85xx
274                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
275                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
276 #else
277                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
278                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
279 #endif
280                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
281         }
282 }
283
284 /* called after powerup, by probe or system-pm "wakeup" */
285 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
286 {
287         ehci_fsl_usb_setup(ehci);
288         ehci_port_power(ehci, 0);
289
290         return 0;
291 }
292
293 /* called during probe() after chip reset completes */
294 static int ehci_fsl_setup(struct usb_hcd *hcd)
295 {
296         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
297         int retval;
298         struct fsl_usb2_platform_data *pdata;
299
300         pdata = hcd->self.controller->platform_data;
301         ehci->big_endian_desc = pdata->big_endian_desc;
302         ehci->big_endian_mmio = pdata->big_endian_mmio;
303
304         /* EHCI registers start at offset 0x100 */
305         ehci->caps = hcd->regs + 0x100;
306         ehci->regs = hcd->regs + 0x100 +
307             HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
308         dbg_hcs_params(ehci, "reset");
309         dbg_hcc_params(ehci, "reset");
310
311         /* cache this readonly data; minimize chip reads */
312         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
313
314         hcd->has_tt = 1;
315
316         retval = ehci_halt(ehci);
317         if (retval)
318                 return retval;
319
320         /* data structure init */
321         retval = ehci_init(hcd);
322         if (retval)
323                 return retval;
324
325         ehci->sbrn = 0x20;
326
327         ehci_reset(ehci);
328
329         retval = ehci_fsl_reinit(ehci);
330         return retval;
331 }
332
333 struct ehci_fsl {
334         struct ehci_hcd ehci;
335
336 #ifdef CONFIG_PM
337         /* Saved USB PHY settings, need to restore after deep sleep. */
338         u32 usb_ctrl;
339 #endif
340 };
341
342 #ifdef CONFIG_PM
343
344 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
345 {
346         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
347
348         return container_of(ehci, struct ehci_fsl, ehci);
349 }
350
351 static int ehci_fsl_drv_suspend(struct device *dev)
352 {
353         struct usb_hcd *hcd = dev_get_drvdata(dev);
354         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
355         void __iomem *non_ehci = hcd->regs;
356
357         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
358                         device_may_wakeup(dev));
359         if (!fsl_deep_sleep())
360                 return 0;
361
362         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
363         return 0;
364 }
365
366 static int ehci_fsl_drv_resume(struct device *dev)
367 {
368         struct usb_hcd *hcd = dev_get_drvdata(dev);
369         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
370         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
371         void __iomem *non_ehci = hcd->regs;
372
373         ehci_prepare_ports_for_controller_resume(ehci);
374         if (!fsl_deep_sleep())
375                 return 0;
376
377         usb_root_hub_lost_power(hcd->self.root_hub);
378
379         /* Restore USB PHY settings and enable the controller. */
380         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
381
382         ehci_reset(ehci);
383         ehci_fsl_reinit(ehci);
384
385         return 0;
386 }
387
388 static int ehci_fsl_drv_restore(struct device *dev)
389 {
390         struct usb_hcd *hcd = dev_get_drvdata(dev);
391
392         usb_root_hub_lost_power(hcd->self.root_hub);
393         return 0;
394 }
395
396 static struct dev_pm_ops ehci_fsl_pm_ops = {
397         .suspend = ehci_fsl_drv_suspend,
398         .resume = ehci_fsl_drv_resume,
399         .restore = ehci_fsl_drv_restore,
400 };
401
402 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
403 #else
404 #define EHCI_FSL_PM_OPS         NULL
405 #endif /* CONFIG_PM */
406
407 static const struct hc_driver ehci_fsl_hc_driver = {
408         .description = hcd_name,
409         .product_desc = "Freescale On-Chip EHCI Host Controller",
410         .hcd_priv_size = sizeof(struct ehci_fsl),
411
412         /*
413          * generic hardware linkage
414          */
415         .irq = ehci_irq,
416         .flags = HCD_USB2 | HCD_MEMORY,
417
418         /*
419          * basic lifecycle operations
420          */
421         .reset = ehci_fsl_setup,
422         .start = ehci_run,
423         .stop = ehci_stop,
424         .shutdown = ehci_shutdown,
425
426         /*
427          * managing i/o requests and associated device resources
428          */
429         .urb_enqueue = ehci_urb_enqueue,
430         .urb_dequeue = ehci_urb_dequeue,
431         .endpoint_disable = ehci_endpoint_disable,
432         .endpoint_reset = ehci_endpoint_reset,
433
434         /*
435          * scheduling support
436          */
437         .get_frame_number = ehci_get_frame,
438
439         /*
440          * root hub support
441          */
442         .hub_status_data = ehci_hub_status_data,
443         .hub_control = ehci_hub_control,
444         .bus_suspend = ehci_bus_suspend,
445         .bus_resume = ehci_bus_resume,
446         .relinquish_port = ehci_relinquish_port,
447         .port_handed_over = ehci_port_handed_over,
448
449         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
450 };
451
452 static int ehci_fsl_drv_probe(struct platform_device *pdev)
453 {
454         if (usb_disabled())
455                 return -ENODEV;
456
457         /* FIXME we only want one one probe() not two */
458         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
459 }
460
461 static int ehci_fsl_drv_remove(struct platform_device *pdev)
462 {
463         struct usb_hcd *hcd = platform_get_drvdata(pdev);
464
465         /* FIXME we only want one one remove() not two */
466         usb_hcd_fsl_remove(hcd, pdev);
467         return 0;
468 }
469
470 MODULE_ALIAS("platform:fsl-ehci");
471
472 static struct platform_driver ehci_fsl_driver = {
473         .probe = ehci_fsl_drv_probe,
474         .remove = ehci_fsl_drv_remove,
475         .shutdown = usb_hcd_platform_shutdown,
476         .driver = {
477                 .name = "fsl-ehci",
478                 .pm = EHCI_FSL_PM_OPS,
479         },
480 };