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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * EHCI HCD (Host Controller Driver) PCI Bus Glue.
4 *
5 * Copyright (c) 2000-2004 by David Brownell
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/usb.h>
12#include <linux/usb/hcd.h>
13
14#include "ehci.h"
15#include "pci-quirks.h"
16
17#define DRIVER_DESC "EHCI PCI platform driver"
18
19static const char hcd_name[] = "ehci-pci";
20
21/* defined here to avoid adding to pci_ids.h for single instance use */
22#define PCI_DEVICE_ID_INTEL_CE4100_USB 0x2e70
23
24#define PCI_VENDOR_ID_ASPEED 0x1a03
25#define PCI_DEVICE_ID_ASPEED_EHCI 0x2603
26
27/*-------------------------------------------------------------------------*/
28#define PCI_DEVICE_ID_INTEL_QUARK_X1000_SOC 0x0939
29static inline bool is_intel_quark_x1000(struct pci_dev *pdev)
30{
31 return pdev->vendor == PCI_VENDOR_ID_INTEL &&
32 pdev->device == PCI_DEVICE_ID_INTEL_QUARK_X1000_SOC;
33}
34
35/*
36 * This is the list of PCI IDs for the devices that have EHCI USB class and
37 * specific drivers for that. One of the example is a ChipIdea device installed
38 * on some Intel MID platforms.
39 */
40static const struct pci_device_id bypass_pci_id_table[] = {
41 /* ChipIdea on Intel MID platform */
42 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811), },
43 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829), },
44 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe006), },
45 {}
46};
47
48static inline bool is_bypassed_id(struct pci_dev *pdev)
49{
50 return !!pci_match_id(bypass_pci_id_table, pdev);
51}
52
53/*
54 * 0x84 is the offset of in/out threshold register,
55 * and it is the same offset as the register of 'hostpc'.
56 */
57#define intel_quark_x1000_insnreg01 hostpc
58
59/* Maximum usable threshold value is 0x7f dwords for both IN and OUT */
60#define INTEL_QUARK_X1000_EHCI_MAX_THRESHOLD 0x007f007f
61
62/* called after powerup, by probe or system-pm "wakeup" */
63static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
64{
65 int retval;
66
67 /* we expect static quirk code to handle the "extended capabilities"
68 * (currently just BIOS handoff) allowed starting with EHCI 0.96
69 */
70
71 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
72 retval = pci_set_mwi(pdev);
73 if (!retval)
74 ehci_dbg(ehci, "MWI active\n");
75
76 /* Reset the threshold limit */
77 if (is_intel_quark_x1000(pdev)) {
78 /*
79 * For the Intel QUARK X1000, raise the I/O threshold to the
80 * maximum usable value in order to improve performance.
81 */
82 ehci_writel(ehci, INTEL_QUARK_X1000_EHCI_MAX_THRESHOLD,
83 ehci->regs->intel_quark_x1000_insnreg01);
84 }
85
86 return 0;
87}
88
89/* called during probe() after chip reset completes */
90static int ehci_pci_setup(struct usb_hcd *hcd)
91{
92 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
93 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
94 u32 temp;
95 int retval;
96
97 ehci->caps = hcd->regs;
98
99 /*
100 * ehci_init() causes memory for DMA transfers to be
101 * allocated. Thus, any vendor-specific workarounds based on
102 * limiting the type of memory used for DMA transfers must
103 * happen before ehci_setup() is called.
104 *
105 * Most other workarounds can be done either before or after
106 * init and reset; they are located here too.
107 */
108 switch (pdev->vendor) {
109 case PCI_VENDOR_ID_TOSHIBA_2:
110 /* celleb's companion chip */
111 if (pdev->device == 0x01b5) {
112#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
113 ehci->big_endian_mmio = 1;
114#else
115 ehci_warn(ehci,
116 "unsupported big endian Toshiba quirk\n");
117#endif
118 }
119 break;
120 case PCI_VENDOR_ID_NVIDIA:
121 /* NVidia reports that certain chips don't handle
122 * QH, ITD, or SITD addresses above 2GB. (But TD,
123 * data buffer, and periodic schedule are normal.)
124 */
125 switch (pdev->device) {
126 case 0x003c: /* MCP04 */
127 case 0x005b: /* CK804 */
128 case 0x00d8: /* CK8 */
129 case 0x00e8: /* CK8S */
130 if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(31)) < 0)
131 ehci_warn(ehci, "can't enable NVidia "
132 "workaround for >2GB RAM\n");
133 break;
134
135 /* Some NForce2 chips have problems with selective suspend;
136 * fixed in newer silicon.
137 */
138 case 0x0068:
139 if (pdev->revision < 0xa4)
140 ehci->no_selective_suspend = 1;
141 break;
142 }
143 break;
144 case PCI_VENDOR_ID_INTEL:
145 if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB)
146 hcd->has_tt = 1;
147 break;
148 case PCI_VENDOR_ID_TDI:
149 if (pdev->device == PCI_DEVICE_ID_TDI_EHCI)
150 hcd->has_tt = 1;
151 break;
152 case PCI_VENDOR_ID_AMD:
153 /* AMD PLL quirk */
154 if (usb_amd_quirk_pll_check())
155 ehci->amd_pll_fix = 1;
156 /* AMD8111 EHCI doesn't work, according to AMD errata */
157 if (pdev->device == 0x7463) {
158 ehci_info(ehci, "ignoring AMD8111 (errata)\n");
159 retval = -EIO;
160 goto done;
161 }
162
163 /*
164 * EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
165 * read/write memory space which does not belong to it when
166 * there is NULL pointer with T-bit set to 1 in the frame list
167 * table. To avoid the issue, the frame list link pointer
168 * should always contain a valid pointer to a inactive qh.
169 */
170 if (pdev->device == 0x7808) {
171 ehci->use_dummy_qh = 1;
172 ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround\n");
173 }
174 break;
175 case PCI_VENDOR_ID_VIA:
176 if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) {
177 u8 tmp;
178
179 /* The VT6212 defaults to a 1 usec EHCI sleep time which
180 * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes
181 * that sleep time use the conventional 10 usec.
182 */
183 pci_read_config_byte(pdev, 0x4b, &tmp);
184 if (tmp & 0x20)
185 break;
186 pci_write_config_byte(pdev, 0x4b, tmp | 0x20);
187 }
188 break;
189 case PCI_VENDOR_ID_ATI:
190 /* AMD PLL quirk */
191 if (usb_amd_quirk_pll_check())
192 ehci->amd_pll_fix = 1;
193
194 /*
195 * EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
196 * read/write memory space which does not belong to it when
197 * there is NULL pointer with T-bit set to 1 in the frame list
198 * table. To avoid the issue, the frame list link pointer
199 * should always contain a valid pointer to a inactive qh.
200 */
201 if (pdev->device == 0x4396) {
202 ehci->use_dummy_qh = 1;
203 ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround\n");
204 }
205 /* SB600 and old version of SB700 have a bug in EHCI controller,
206 * which causes usb devices lose response in some cases.
207 */
208 if ((pdev->device == 0x4386 || pdev->device == 0x4396) &&
209 usb_amd_hang_symptom_quirk()) {
210 u8 tmp;
211 ehci_info(ehci, "applying AMD SB600/SB700 USB freeze workaround\n");
212 pci_read_config_byte(pdev, 0x53, &tmp);
213 pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
214 }
215 break;
216 case PCI_VENDOR_ID_NETMOS:
217 /* MosChip frame-index-register bug */
218 ehci_info(ehci, "applying MosChip frame-index workaround\n");
219 ehci->frame_index_bug = 1;
220 break;
221 case PCI_VENDOR_ID_HUAWEI:
222 /* Synopsys HC bug */
223 if (pdev->device == 0xa239) {
224 ehci_info(ehci, "applying Synopsys HC workaround\n");
225 ehci->has_synopsys_hc_bug = 1;
226 }
227 break;
228 case PCI_VENDOR_ID_ASPEED:
229 if (pdev->device == PCI_DEVICE_ID_ASPEED_EHCI) {
230 ehci_info(ehci, "applying Aspeed HC workaround\n");
231 ehci->is_aspeed = 1;
232 }
233 break;
234 case PCI_VENDOR_ID_ZHAOXIN:
235 if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x90)
236 ehci->zx_wakeup_clear_needed = 1;
237 break;
238 }
239
240 /* optional debug port, normally in the first BAR */
241 temp = pci_find_capability(pdev, PCI_CAP_ID_DBG);
242 if (temp) {
243 pci_read_config_dword(pdev, temp, &temp);
244 temp >>= 16;
245 if (((temp >> 13) & 7) == 1) {
246 u32 hcs_params = ehci_readl(ehci,
247 &ehci->caps->hcs_params);
248
249 temp &= 0x1fff;
250 ehci->debug = hcd->regs + temp;
251 temp = ehci_readl(ehci, &ehci->debug->control);
252 ehci_info(ehci, "debug port %d%s\n",
253 HCS_DEBUG_PORT(hcs_params),
254 (temp & DBGP_ENABLED) ? " IN USE" : "");
255 if (!(temp & DBGP_ENABLED))
256 ehci->debug = NULL;
257 }
258 }
259
260 retval = ehci_setup(hcd);
261 if (retval)
262 return retval;
263
264 /* These workarounds need to be applied after ehci_setup() */
265 switch (pdev->vendor) {
266 case PCI_VENDOR_ID_NEC:
267 case PCI_VENDOR_ID_INTEL:
268 case PCI_VENDOR_ID_AMD:
269 ehci->need_io_watchdog = 0;
270 break;
271 case PCI_VENDOR_ID_NVIDIA:
272 switch (pdev->device) {
273 /* MCP89 chips on the MacBookAir3,1 give EPROTO when
274 * fetching device descriptors unless LPM is disabled.
275 * There are also intermittent problems enumerating
276 * devices with PPCD enabled.
277 */
278 case 0x0d9d:
279 ehci_info(ehci, "disable ppcd for nvidia mcp89\n");
280 ehci->has_ppcd = 0;
281 ehci->command &= ~CMD_PPCEE;
282 break;
283 }
284 break;
285 }
286
287 /* at least the Genesys GL880S needs fixup here */
288 temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
289 temp &= 0x0f;
290 if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
291 ehci_dbg(ehci, "bogus port configuration: "
292 "cc=%d x pcc=%d < ports=%d\n",
293 HCS_N_CC(ehci->hcs_params),
294 HCS_N_PCC(ehci->hcs_params),
295 HCS_N_PORTS(ehci->hcs_params));
296
297 switch (pdev->vendor) {
298 case 0x17a0: /* GENESYS */
299 /* GL880S: should be PORTS=2 */
300 temp |= (ehci->hcs_params & ~0xf);
301 ehci->hcs_params = temp;
302 break;
303 case PCI_VENDOR_ID_NVIDIA:
304 /* NF4: should be PCC=10 */
305 break;
306 }
307 }
308
309 /* Serial Bus Release Number is at PCI 0x60 offset */
310 if (pdev->vendor == PCI_VENDOR_ID_STMICRO
311 && pdev->device == PCI_DEVICE_ID_STMICRO_USB_HOST)
312 ; /* ConneXT has no sbrn register */
313 else if (pdev->vendor == PCI_VENDOR_ID_HUAWEI
314 && pdev->device == 0xa239)
315 ; /* HUAWEI Kunpeng920 USB EHCI has no sbrn register */
316 else
317 pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
318
319 /* Keep this around for a while just in case some EHCI
320 * implementation uses legacy PCI PM support. This test
321 * can be removed on 17 Dec 2009 if the dev_warn() hasn't
322 * been triggered by then.
323 */
324 if (!device_can_wakeup(&pdev->dev)) {
325 u16 port_wake;
326
327 pci_read_config_word(pdev, 0x62, &port_wake);
328 if (port_wake & 0x0001) {
329 dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
330 device_set_wakeup_capable(&pdev->dev, 1);
331 }
332 }
333
334#ifdef CONFIG_PM
335 if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
336 ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
337#endif
338
339 retval = ehci_pci_reinit(ehci, pdev);
340done:
341 return retval;
342}
343
344/*-------------------------------------------------------------------------*/
345
346#ifdef CONFIG_PM
347
348/* suspend/resume, section 4.3 */
349
350/* These routines rely on the PCI bus glue
351 * to handle powerdown and wakeup, and currently also on
352 * transceivers that don't need any software attention to set up
353 * the right sort of wakeup.
354 * Also they depend on separate root hub suspend/resume.
355 */
356
357static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
358{
359 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
360 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
361
362 if (ehci_resume(hcd, hibernated) != 0)
363 (void) ehci_pci_reinit(ehci, pdev);
364 return 0;
365}
366
367#else
368
369#define ehci_suspend NULL
370#define ehci_pci_resume NULL
371#endif /* CONFIG_PM */
372
373static struct hc_driver __read_mostly ehci_pci_hc_driver;
374
375static const struct ehci_driver_overrides pci_overrides __initconst = {
376 .reset = ehci_pci_setup,
377};
378
379/*-------------------------------------------------------------------------*/
380
381static int ehci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
382{
383 if (is_bypassed_id(pdev))
384 return -ENODEV;
385 return usb_hcd_pci_probe(pdev, &ehci_pci_hc_driver);
386}
387
388static void ehci_pci_remove(struct pci_dev *pdev)
389{
390 pci_clear_mwi(pdev);
391 usb_hcd_pci_remove(pdev);
392}
393
394/* PCI driver selection metadata; PCI hotplugging uses this */
395static const struct pci_device_id pci_ids [] = { {
396 /* handle any USB 2.0 EHCI controller */
397 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
398 }, {
399 PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_HOST),
400 },
401 { /* end: all zeroes */ }
402};
403MODULE_DEVICE_TABLE(pci, pci_ids);
404
405/* pci driver glue; this is a "new style" PCI driver module */
406static struct pci_driver ehci_pci_driver = {
407 .name = hcd_name,
408 .id_table = pci_ids,
409
410 .probe = ehci_pci_probe,
411 .remove = ehci_pci_remove,
412 .shutdown = usb_hcd_pci_shutdown,
413
414 .driver = {
415#ifdef CONFIG_PM
416 .pm = &usb_hcd_pci_pm_ops,
417#endif
418 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
419 },
420};
421
422static int __init ehci_pci_init(void)
423{
424 if (usb_disabled())
425 return -ENODEV;
426
427 ehci_init_driver(&ehci_pci_hc_driver, &pci_overrides);
428
429 /* Entries for the PCI suspend/resume callbacks are special */
430 ehci_pci_hc_driver.pci_suspend = ehci_suspend;
431 ehci_pci_hc_driver.pci_resume = ehci_pci_resume;
432
433 return pci_register_driver(&ehci_pci_driver);
434}
435module_init(ehci_pci_init);
436
437static void __exit ehci_pci_cleanup(void)
438{
439 pci_unregister_driver(&ehci_pci_driver);
440}
441module_exit(ehci_pci_cleanup);
442
443MODULE_DESCRIPTION(DRIVER_DESC);
444MODULE_AUTHOR("David Brownell");
445MODULE_AUTHOR("Alan Stern");
446MODULE_LICENSE("GPL");
1/*
2 * EHCI HCD (Host Controller Driver) PCI Bus Glue.
3 *
4 * Copyright (c) 2000-2004 by David Brownell
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/pci.h>
24#include <linux/usb.h>
25#include <linux/usb/hcd.h>
26
27#include "ehci.h"
28#include "pci-quirks.h"
29
30#define DRIVER_DESC "EHCI PCI platform driver"
31
32static const char hcd_name[] = "ehci-pci";
33
34/* defined here to avoid adding to pci_ids.h for single instance use */
35#define PCI_DEVICE_ID_INTEL_CE4100_USB 0x2e70
36
37/*-------------------------------------------------------------------------*/
38
39/* called after powerup, by probe or system-pm "wakeup" */
40static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
41{
42 int retval;
43
44 /* we expect static quirk code to handle the "extended capabilities"
45 * (currently just BIOS handoff) allowed starting with EHCI 0.96
46 */
47
48 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
49 retval = pci_set_mwi(pdev);
50 if (!retval)
51 ehci_dbg(ehci, "MWI active\n");
52
53 return 0;
54}
55
56/* called during probe() after chip reset completes */
57static int ehci_pci_setup(struct usb_hcd *hcd)
58{
59 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
60 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
61 u32 temp;
62 int retval;
63
64 ehci->caps = hcd->regs;
65
66 /*
67 * ehci_init() causes memory for DMA transfers to be
68 * allocated. Thus, any vendor-specific workarounds based on
69 * limiting the type of memory used for DMA transfers must
70 * happen before ehci_setup() is called.
71 *
72 * Most other workarounds can be done either before or after
73 * init and reset; they are located here too.
74 */
75 switch (pdev->vendor) {
76 case PCI_VENDOR_ID_TOSHIBA_2:
77 /* celleb's companion chip */
78 if (pdev->device == 0x01b5) {
79#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
80 ehci->big_endian_mmio = 1;
81#else
82 ehci_warn(ehci,
83 "unsupported big endian Toshiba quirk\n");
84#endif
85 }
86 break;
87 case PCI_VENDOR_ID_NVIDIA:
88 /* NVidia reports that certain chips don't handle
89 * QH, ITD, or SITD addresses above 2GB. (But TD,
90 * data buffer, and periodic schedule are normal.)
91 */
92 switch (pdev->device) {
93 case 0x003c: /* MCP04 */
94 case 0x005b: /* CK804 */
95 case 0x00d8: /* CK8 */
96 case 0x00e8: /* CK8S */
97 if (pci_set_consistent_dma_mask(pdev,
98 DMA_BIT_MASK(31)) < 0)
99 ehci_warn(ehci, "can't enable NVidia "
100 "workaround for >2GB RAM\n");
101 break;
102
103 /* Some NForce2 chips have problems with selective suspend;
104 * fixed in newer silicon.
105 */
106 case 0x0068:
107 if (pdev->revision < 0xa4)
108 ehci->no_selective_suspend = 1;
109 break;
110 }
111 break;
112 case PCI_VENDOR_ID_INTEL:
113 if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB)
114 hcd->has_tt = 1;
115 break;
116 case PCI_VENDOR_ID_TDI:
117 if (pdev->device == PCI_DEVICE_ID_TDI_EHCI)
118 hcd->has_tt = 1;
119 break;
120 case PCI_VENDOR_ID_AMD:
121 /* AMD PLL quirk */
122 if (usb_amd_find_chipset_info())
123 ehci->amd_pll_fix = 1;
124 /* AMD8111 EHCI doesn't work, according to AMD errata */
125 if (pdev->device == 0x7463) {
126 ehci_info(ehci, "ignoring AMD8111 (errata)\n");
127 retval = -EIO;
128 goto done;
129 }
130
131 /*
132 * EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
133 * read/write memory space which does not belong to it when
134 * there is NULL pointer with T-bit set to 1 in the frame list
135 * table. To avoid the issue, the frame list link pointer
136 * should always contain a valid pointer to a inactive qh.
137 */
138 if (pdev->device == 0x7808) {
139 ehci->use_dummy_qh = 1;
140 ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround\n");
141 }
142 break;
143 case PCI_VENDOR_ID_VIA:
144 if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) {
145 u8 tmp;
146
147 /* The VT6212 defaults to a 1 usec EHCI sleep time which
148 * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes
149 * that sleep time use the conventional 10 usec.
150 */
151 pci_read_config_byte(pdev, 0x4b, &tmp);
152 if (tmp & 0x20)
153 break;
154 pci_write_config_byte(pdev, 0x4b, tmp | 0x20);
155 }
156 break;
157 case PCI_VENDOR_ID_ATI:
158 /* AMD PLL quirk */
159 if (usb_amd_find_chipset_info())
160 ehci->amd_pll_fix = 1;
161
162 /*
163 * EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
164 * read/write memory space which does not belong to it when
165 * there is NULL pointer with T-bit set to 1 in the frame list
166 * table. To avoid the issue, the frame list link pointer
167 * should always contain a valid pointer to a inactive qh.
168 */
169 if (pdev->device == 0x4396) {
170 ehci->use_dummy_qh = 1;
171 ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround\n");
172 }
173 /* SB600 and old version of SB700 have a bug in EHCI controller,
174 * which causes usb devices lose response in some cases.
175 */
176 if ((pdev->device == 0x4386 || pdev->device == 0x4396) &&
177 usb_amd_hang_symptom_quirk()) {
178 u8 tmp;
179 ehci_info(ehci, "applying AMD SB600/SB700 USB freeze workaround\n");
180 pci_read_config_byte(pdev, 0x53, &tmp);
181 pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
182 }
183 break;
184 case PCI_VENDOR_ID_NETMOS:
185 /* MosChip frame-index-register bug */
186 ehci_info(ehci, "applying MosChip frame-index workaround\n");
187 ehci->frame_index_bug = 1;
188 break;
189 }
190
191 /* optional debug port, normally in the first BAR */
192 temp = pci_find_capability(pdev, PCI_CAP_ID_DBG);
193 if (temp) {
194 pci_read_config_dword(pdev, temp, &temp);
195 temp >>= 16;
196 if (((temp >> 13) & 7) == 1) {
197 u32 hcs_params = ehci_readl(ehci,
198 &ehci->caps->hcs_params);
199
200 temp &= 0x1fff;
201 ehci->debug = hcd->regs + temp;
202 temp = ehci_readl(ehci, &ehci->debug->control);
203 ehci_info(ehci, "debug port %d%s\n",
204 HCS_DEBUG_PORT(hcs_params),
205 (temp & DBGP_ENABLED) ? " IN USE" : "");
206 if (!(temp & DBGP_ENABLED))
207 ehci->debug = NULL;
208 }
209 }
210
211 retval = ehci_setup(hcd);
212 if (retval)
213 return retval;
214
215 /* These workarounds need to be applied after ehci_setup() */
216 switch (pdev->vendor) {
217 case PCI_VENDOR_ID_NEC:
218 ehci->need_io_watchdog = 0;
219 break;
220 case PCI_VENDOR_ID_INTEL:
221 ehci->need_io_watchdog = 0;
222 break;
223 case PCI_VENDOR_ID_NVIDIA:
224 switch (pdev->device) {
225 /* MCP89 chips on the MacBookAir3,1 give EPROTO when
226 * fetching device descriptors unless LPM is disabled.
227 * There are also intermittent problems enumerating
228 * devices with PPCD enabled.
229 */
230 case 0x0d9d:
231 ehci_info(ehci, "disable ppcd for nvidia mcp89\n");
232 ehci->has_ppcd = 0;
233 ehci->command &= ~CMD_PPCEE;
234 break;
235 }
236 break;
237 }
238
239 /* at least the Genesys GL880S needs fixup here */
240 temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
241 temp &= 0x0f;
242 if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
243 ehci_dbg(ehci, "bogus port configuration: "
244 "cc=%d x pcc=%d < ports=%d\n",
245 HCS_N_CC(ehci->hcs_params),
246 HCS_N_PCC(ehci->hcs_params),
247 HCS_N_PORTS(ehci->hcs_params));
248
249 switch (pdev->vendor) {
250 case 0x17a0: /* GENESYS */
251 /* GL880S: should be PORTS=2 */
252 temp |= (ehci->hcs_params & ~0xf);
253 ehci->hcs_params = temp;
254 break;
255 case PCI_VENDOR_ID_NVIDIA:
256 /* NF4: should be PCC=10 */
257 break;
258 }
259 }
260
261 /* Serial Bus Release Number is at PCI 0x60 offset */
262 if (pdev->vendor == PCI_VENDOR_ID_STMICRO
263 && pdev->device == PCI_DEVICE_ID_STMICRO_USB_HOST)
264 ; /* ConneXT has no sbrn register */
265 else
266 pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
267
268 /* Keep this around for a while just in case some EHCI
269 * implementation uses legacy PCI PM support. This test
270 * can be removed on 17 Dec 2009 if the dev_warn() hasn't
271 * been triggered by then.
272 */
273 if (!device_can_wakeup(&pdev->dev)) {
274 u16 port_wake;
275
276 pci_read_config_word(pdev, 0x62, &port_wake);
277 if (port_wake & 0x0001) {
278 dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
279 device_set_wakeup_capable(&pdev->dev, 1);
280 }
281 }
282
283#ifdef CONFIG_PM_RUNTIME
284 if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
285 ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
286#endif
287
288 retval = ehci_pci_reinit(ehci, pdev);
289done:
290 return retval;
291}
292
293/*-------------------------------------------------------------------------*/
294
295#ifdef CONFIG_PM
296
297/* suspend/resume, section 4.3 */
298
299/* These routines rely on the PCI bus glue
300 * to handle powerdown and wakeup, and currently also on
301 * transceivers that don't need any software attention to set up
302 * the right sort of wakeup.
303 * Also they depend on separate root hub suspend/resume.
304 */
305
306static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
307{
308 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
309 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
310
311 if (ehci_resume(hcd, hibernated) != 0)
312 (void) ehci_pci_reinit(ehci, pdev);
313 return 0;
314}
315
316#else
317
318#define ehci_suspend NULL
319#define ehci_pci_resume NULL
320#endif /* CONFIG_PM */
321
322static struct hc_driver __read_mostly ehci_pci_hc_driver;
323
324static const struct ehci_driver_overrides pci_overrides __initconst = {
325 .reset = ehci_pci_setup,
326};
327
328/*-------------------------------------------------------------------------*/
329
330/* PCI driver selection metadata; PCI hotplugging uses this */
331static const struct pci_device_id pci_ids [] = { {
332 /* handle any USB 2.0 EHCI controller */
333 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
334 .driver_data = (unsigned long) &ehci_pci_hc_driver,
335 }, {
336 PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_HOST),
337 .driver_data = (unsigned long) &ehci_pci_hc_driver,
338 },
339 { /* end: all zeroes */ }
340};
341MODULE_DEVICE_TABLE(pci, pci_ids);
342
343/* pci driver glue; this is a "new style" PCI driver module */
344static struct pci_driver ehci_pci_driver = {
345 .name = (char *) hcd_name,
346 .id_table = pci_ids,
347
348 .probe = usb_hcd_pci_probe,
349 .remove = usb_hcd_pci_remove,
350 .shutdown = usb_hcd_pci_shutdown,
351
352#ifdef CONFIG_PM
353 .driver = {
354 .pm = &usb_hcd_pci_pm_ops
355 },
356#endif
357};
358
359static int __init ehci_pci_init(void)
360{
361 if (usb_disabled())
362 return -ENODEV;
363
364 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
365
366 ehci_init_driver(&ehci_pci_hc_driver, &pci_overrides);
367
368 /* Entries for the PCI suspend/resume callbacks are special */
369 ehci_pci_hc_driver.pci_suspend = ehci_suspend;
370 ehci_pci_hc_driver.pci_resume = ehci_pci_resume;
371
372 return pci_register_driver(&ehci_pci_driver);
373}
374module_init(ehci_pci_init);
375
376static void __exit ehci_pci_cleanup(void)
377{
378 pci_unregister_driver(&ehci_pci_driver);
379}
380module_exit(ehci_pci_cleanup);
381
382MODULE_DESCRIPTION(DRIVER_DESC);
383MODULE_AUTHOR("David Brownell");
384MODULE_AUTHOR("Alan Stern");
385MODULE_LICENSE("GPL");