1 // SPDX-License-Identifier: GPL-2.0
3 * This file contains code to reset and initialize USB host controllers.
4 * Some of it includes work-arounds for PCI hardware and BIOS quirks.
5 * It may need to run early during booting -- before USB would normally
6 * initialize -- to ensure that Linux doesn't use any legacy modes.
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/delay.h>
16 #include <linux/export.h>
17 #include <linux/acpi.h>
18 #include <linux/dmi.h>
20 #include <linux/iopoll.h>
22 #include "pci-quirks.h"
23 #include "xhci-ext-caps.h"
26 #define UHCI_USBLEGSUP 0xc0 /* legacy support */
27 #define UHCI_USBCMD 0 /* command register */
28 #define UHCI_USBINTR 4 /* interrupt register */
29 #define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */
30 #define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */
31 #define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */
32 #define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */
33 #define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */
34 #define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */
35 #define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */
37 #define OHCI_CONTROL 0x04
38 #define OHCI_CMDSTATUS 0x08
39 #define OHCI_INTRSTATUS 0x0c
40 #define OHCI_INTRENABLE 0x10
41 #define OHCI_INTRDISABLE 0x14
42 #define OHCI_FMINTERVAL 0x34
43 #define OHCI_HCFS (3 << 6) /* hc functional state */
44 #define OHCI_HCR (1 << 0) /* host controller reset */
45 #define OHCI_OCR (1 << 3) /* ownership change request */
46 #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
47 #define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
48 #define OHCI_INTR_OC (1 << 30) /* ownership change */
50 #define EHCI_HCC_PARAMS 0x08 /* extended capabilities */
51 #define EHCI_USBCMD 0 /* command register */
52 #define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */
53 #define EHCI_USBSTS 4 /* status register */
54 #define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */
55 #define EHCI_USBINTR 8 /* interrupt register */
56 #define EHCI_CONFIGFLAG 0x40 /* configured flag register */
57 #define EHCI_USBLEGSUP 0 /* legacy support register */
58 #define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */
59 #define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */
60 #define EHCI_USBLEGCTLSTS 4 /* legacy control/status */
61 #define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */
64 #define AB_REG_BAR_LOW 0xe0
65 #define AB_REG_BAR_HIGH 0xe1
66 #define AB_REG_BAR_SB700 0xf0
67 #define AB_INDX(addr) ((addr) + 0x00)
68 #define AB_DATA(addr) ((addr) + 0x04)
72 #define PT_ADDR_INDX 0xE8
73 #define PT_READ_INDX 0xE4
74 #define PT_SIG_1_ADDR 0xA520
75 #define PT_SIG_2_ADDR 0xA521
76 #define PT_SIG_3_ADDR 0xA522
77 #define PT_SIG_4_ADDR 0xA523
78 #define PT_SIG_1_DATA 0x78
79 #define PT_SIG_2_DATA 0x56
80 #define PT_SIG_3_DATA 0x34
81 #define PT_SIG_4_DATA 0x12
82 #define PT4_P1_REG 0xB521
83 #define PT4_P2_REG 0xB522
84 #define PT2_P1_REG 0xD520
85 #define PT2_P2_REG 0xD521
86 #define PT1_P1_REG 0xD522
87 #define PT1_P2_REG 0xD523
89 #define NB_PCIE_INDX_ADDR 0xe0
90 #define NB_PCIE_INDX_DATA 0xe4
91 #define PCIE_P_CNTL 0x10040
92 #define BIF_NB 0x10002
93 #define NB_PIF0_PWRDOWN_0 0x01100012
94 #define NB_PIF0_PWRDOWN_1 0x01100013
96 #define USB_INTEL_XUSB2PR 0xD0
97 #define USB_INTEL_USB2PRM 0xD4
98 #define USB_INTEL_USB3_PSSEN 0xD8
99 #define USB_INTEL_USB3PRM 0xDC
101 /* ASMEDIA quirk use */
102 #define ASMT_DATA_WRITE0_REG 0xF8
103 #define ASMT_DATA_WRITE1_REG 0xFC
104 #define ASMT_CONTROL_REG 0xE0
105 #define ASMT_CONTROL_WRITE_BIT 0x02
106 #define ASMT_WRITEREG_CMD 0x10423
107 #define ASMT_FLOWCTL_ADDR 0xFA30
108 #define ASMT_FLOWCTL_DATA 0xBA
109 #define ASMT_PSEUDO_DATA 0
112 * amd_chipset_gen values represent AMD different chipset generations
114 enum amd_chipset_gen {
126 struct amd_chipset_type {
127 enum amd_chipset_gen gen;
131 static struct amd_chipset_info {
132 struct pci_dev *nb_dev;
133 struct pci_dev *smbus_dev;
135 struct amd_chipset_type sb_type;
141 static DEFINE_SPINLOCK(amd_lock);
144 * amd_chipset_sb_type_init - initialize amd chipset southbridge type
146 * AMD FCH/SB generation and revision is identified by SMBus controller
147 * vendor, device and revision IDs.
149 * Returns: 1 if it is an AMD chipset, 0 otherwise.
151 static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo)
154 pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN;
156 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
157 PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
158 if (pinfo->smbus_dev) {
159 rev = pinfo->smbus_dev->revision;
160 if (rev >= 0x10 && rev <= 0x1f)
161 pinfo->sb_type.gen = AMD_CHIPSET_SB600;
162 else if (rev >= 0x30 && rev <= 0x3f)
163 pinfo->sb_type.gen = AMD_CHIPSET_SB700;
164 else if (rev >= 0x40 && rev <= 0x4f)
165 pinfo->sb_type.gen = AMD_CHIPSET_SB800;
167 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
168 PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
170 if (pinfo->smbus_dev) {
171 rev = pinfo->smbus_dev->revision;
172 if (rev >= 0x11 && rev <= 0x14)
173 pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
174 else if (rev >= 0x15 && rev <= 0x18)
175 pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
176 else if (rev >= 0x39 && rev <= 0x3a)
177 pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
179 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
181 if (pinfo->smbus_dev) {
182 rev = pinfo->smbus_dev->revision;
183 pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;
185 pinfo->sb_type.gen = NOT_AMD_CHIPSET;
190 pinfo->sb_type.rev = rev;
194 void sb800_prefetch(struct device *dev, int on)
197 struct pci_dev *pdev = to_pci_dev(dev);
199 pci_read_config_word(pdev, 0x50, &misc);
201 pci_write_config_word(pdev, 0x50, misc & 0xfcff);
203 pci_write_config_word(pdev, 0x50, misc | 0x0300);
205 EXPORT_SYMBOL_GPL(sb800_prefetch);
207 static void usb_amd_find_chipset_info(void)
210 struct amd_chipset_info info;
211 info.need_pll_quirk = false;
213 spin_lock_irqsave(&amd_lock, flags);
215 /* probe only once */
216 if (amd_chipset.probe_count > 0) {
217 amd_chipset.probe_count++;
218 spin_unlock_irqrestore(&amd_lock, flags);
221 memset(&info, 0, sizeof(info));
222 spin_unlock_irqrestore(&amd_lock, flags);
224 if (!amd_chipset_sb_type_init(&info)) {
228 switch (info.sb_type.gen) {
229 case AMD_CHIPSET_SB700:
230 info.need_pll_quirk = info.sb_type.rev <= 0x3B;
232 case AMD_CHIPSET_SB800:
233 case AMD_CHIPSET_HUDSON2:
234 case AMD_CHIPSET_BOLTON:
235 info.need_pll_quirk = true;
238 info.need_pll_quirk = false;
242 if (!info.need_pll_quirk) {
243 if (info.smbus_dev) {
244 pci_dev_put(info.smbus_dev);
245 info.smbus_dev = NULL;
250 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL);
254 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL);
258 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD,
265 printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n");
269 spin_lock_irqsave(&amd_lock, flags);
270 if (amd_chipset.probe_count > 0) {
271 /* race - someone else was faster - drop devices */
273 /* Mark that we where here */
274 amd_chipset.probe_count++;
276 spin_unlock_irqrestore(&amd_lock, flags);
278 pci_dev_put(info.nb_dev);
279 pci_dev_put(info.smbus_dev);
282 /* no race - commit the result */
285 spin_unlock_irqrestore(&amd_lock, flags);
289 int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev)
291 /* Make sure amd chipset type has already been initialized */
292 usb_amd_find_chipset_info();
293 if (amd_chipset.sb_type.gen == AMD_CHIPSET_YANGTZE ||
294 amd_chipset.sb_type.gen == AMD_CHIPSET_TAISHAN) {
295 dev_dbg(&pdev->dev, "QUIRK: Enable AMD remote wakeup fix\n");
300 EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk);
302 bool usb_amd_hang_symptom_quirk(void)
306 usb_amd_find_chipset_info();
307 rev = amd_chipset.sb_type.rev;
308 /* SB600 and old version of SB700 have hang symptom bug */
309 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 ||
310 (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
311 rev >= 0x3a && rev <= 0x3b);
313 EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk);
315 bool usb_amd_prefetch_quirk(void)
317 usb_amd_find_chipset_info();
318 /* SB800 needs pre-fetch fix */
319 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800;
321 EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk);
323 bool usb_amd_quirk_pll_check(void)
325 usb_amd_find_chipset_info();
326 return amd_chipset.need_pll_quirk;
328 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_check);
331 * The hardware normally enables the A-link power management feature, which
332 * lets the system lower the power consumption in idle states.
334 * This USB quirk prevents the link going into that lower power state
335 * during isochronous transfers.
337 * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of
338 * some AMD platforms may stutter or have breaks occasionally.
340 static void usb_amd_quirk_pll(int disable)
342 u32 addr, addr_low, addr_high, val;
343 u32 bit = disable ? 0 : 1;
346 spin_lock_irqsave(&amd_lock, flags);
349 amd_chipset.isoc_reqs++;
350 if (amd_chipset.isoc_reqs > 1) {
351 spin_unlock_irqrestore(&amd_lock, flags);
355 amd_chipset.isoc_reqs--;
356 if (amd_chipset.isoc_reqs > 0) {
357 spin_unlock_irqrestore(&amd_lock, flags);
362 if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 ||
363 amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 ||
364 amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) {
365 outb_p(AB_REG_BAR_LOW, 0xcd6);
366 addr_low = inb_p(0xcd7);
367 outb_p(AB_REG_BAR_HIGH, 0xcd6);
368 addr_high = inb_p(0xcd7);
369 addr = addr_high << 8 | addr_low;
371 outl_p(0x30, AB_INDX(addr));
372 outl_p(0x40, AB_DATA(addr));
373 outl_p(0x34, AB_INDX(addr));
374 val = inl_p(AB_DATA(addr));
375 } else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
376 amd_chipset.sb_type.rev <= 0x3b) {
377 pci_read_config_dword(amd_chipset.smbus_dev,
378 AB_REG_BAR_SB700, &addr);
379 outl(AX_INDXC, AB_INDX(addr));
380 outl(0x40, AB_DATA(addr));
381 outl(AX_DATAC, AB_INDX(addr));
382 val = inl(AB_DATA(addr));
384 spin_unlock_irqrestore(&amd_lock, flags);
390 val |= (1 << 4) | (1 << 9);
393 val &= ~((1 << 4) | (1 << 9));
395 outl_p(val, AB_DATA(addr));
397 if (!amd_chipset.nb_dev) {
398 spin_unlock_irqrestore(&amd_lock, flags);
402 if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) {
404 pci_write_config_dword(amd_chipset.nb_dev,
405 NB_PCIE_INDX_ADDR, addr);
406 pci_read_config_dword(amd_chipset.nb_dev,
407 NB_PCIE_INDX_DATA, &val);
409 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12));
410 val |= bit | (bit << 3) | (bit << 12);
411 val |= ((!bit) << 4) | ((!bit) << 9);
412 pci_write_config_dword(amd_chipset.nb_dev,
413 NB_PCIE_INDX_DATA, val);
416 pci_write_config_dword(amd_chipset.nb_dev,
417 NB_PCIE_INDX_ADDR, addr);
418 pci_read_config_dword(amd_chipset.nb_dev,
419 NB_PCIE_INDX_DATA, &val);
423 pci_write_config_dword(amd_chipset.nb_dev,
424 NB_PCIE_INDX_DATA, val);
425 } else if (amd_chipset.nb_type == 2) {
426 addr = NB_PIF0_PWRDOWN_0;
427 pci_write_config_dword(amd_chipset.nb_dev,
428 NB_PCIE_INDX_ADDR, addr);
429 pci_read_config_dword(amd_chipset.nb_dev,
430 NB_PCIE_INDX_DATA, &val);
436 pci_write_config_dword(amd_chipset.nb_dev,
437 NB_PCIE_INDX_DATA, val);
439 addr = NB_PIF0_PWRDOWN_1;
440 pci_write_config_dword(amd_chipset.nb_dev,
441 NB_PCIE_INDX_ADDR, addr);
442 pci_read_config_dword(amd_chipset.nb_dev,
443 NB_PCIE_INDX_DATA, &val);
449 pci_write_config_dword(amd_chipset.nb_dev,
450 NB_PCIE_INDX_DATA, val);
453 spin_unlock_irqrestore(&amd_lock, flags);
457 void usb_amd_quirk_pll_disable(void)
459 usb_amd_quirk_pll(1);
461 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable);
463 static int usb_asmedia_wait_write(struct pci_dev *pdev)
465 unsigned long retry_count;
468 for (retry_count = 1000; retry_count > 0; --retry_count) {
470 pci_read_config_byte(pdev, ASMT_CONTROL_REG, &value);
473 dev_err(&pdev->dev, "%s: check_ready ERROR", __func__);
477 if ((value & ASMT_CONTROL_WRITE_BIT) == 0)
483 dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__);
487 void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev)
489 if (usb_asmedia_wait_write(pdev) != 0)
492 /* send command and address to device */
493 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_WRITEREG_CMD);
494 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_FLOWCTL_ADDR);
495 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
497 if (usb_asmedia_wait_write(pdev) != 0)
500 /* send data to device */
501 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_FLOWCTL_DATA);
502 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_PSEUDO_DATA);
503 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
505 EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol);
507 void usb_amd_quirk_pll_enable(void)
509 usb_amd_quirk_pll(0);
511 EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable);
513 void usb_amd_dev_put(void)
515 struct pci_dev *nb, *smbus;
518 spin_lock_irqsave(&amd_lock, flags);
520 amd_chipset.probe_count--;
521 if (amd_chipset.probe_count > 0) {
522 spin_unlock_irqrestore(&amd_lock, flags);
526 /* save them to pci_dev_put outside of spinlock */
527 nb = amd_chipset.nb_dev;
528 smbus = amd_chipset.smbus_dev;
530 amd_chipset.nb_dev = NULL;
531 amd_chipset.smbus_dev = NULL;
532 amd_chipset.nb_type = 0;
533 memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type));
534 amd_chipset.isoc_reqs = 0;
535 amd_chipset.need_pll_quirk = false;
537 spin_unlock_irqrestore(&amd_lock, flags);
542 EXPORT_SYMBOL_GPL(usb_amd_dev_put);
545 * Check if port is disabled in BIOS on AMD Promontory host.
546 * BIOS Disabled ports may wake on connect/disconnect and need
547 * driver workaround to keep them disabled.
548 * Returns true if port is marked disabled.
550 bool usb_amd_pt_check_port(struct device *device, int port)
552 unsigned char value, port_shift;
553 struct pci_dev *pdev;
556 pdev = to_pci_dev(device);
557 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_1_ADDR);
559 pci_read_config_byte(pdev, PT_READ_INDX, &value);
560 if (value != PT_SIG_1_DATA)
563 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_2_ADDR);
565 pci_read_config_byte(pdev, PT_READ_INDX, &value);
566 if (value != PT_SIG_2_DATA)
569 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_3_ADDR);
571 pci_read_config_byte(pdev, PT_READ_INDX, &value);
572 if (value != PT_SIG_3_DATA)
575 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_4_ADDR);
577 pci_read_config_byte(pdev, PT_READ_INDX, &value);
578 if (value != PT_SIG_4_DATA)
581 /* Check disabled port setting, if bit is set port is enabled */
582 switch (pdev->device) {
586 * device is AMD_PROMONTORYA_4(0x43b9) or PROMONTORYA_3(0x43ba)
587 * PT4_P1_REG bits[7..1] represents USB2.0 ports 6 to 0
588 * PT4_P2_REG bits[6..0] represents ports 13 to 7
592 port_shift = port - 7;
595 port_shift = port + 1;
600 * device is AMD_PROMONTORYA_2(0x43bb)
601 * PT2_P1_REG bits[7..5] represents USB2.0 ports 2 to 0
602 * PT2_P2_REG bits[5..0] represents ports 9 to 3
606 port_shift = port - 3;
609 port_shift = port + 5;
614 * device is AMD_PROMONTORYA_1(0x43bc)
615 * PT1_P1_REG[7..4] represents USB2.0 ports 3 to 0
616 * PT1_P2_REG[5..0] represents ports 9 to 4
620 port_shift = port - 4;
623 port_shift = port + 4;
629 pci_write_config_word(pdev, PT_ADDR_INDX, reg);
630 pci_read_config_byte(pdev, PT_READ_INDX, &value);
632 return !(value & BIT(port_shift));
634 EXPORT_SYMBOL_GPL(usb_amd_pt_check_port);
637 * Make sure the controller is completely inactive, unable to
638 * generate interrupts or do DMA.
640 void uhci_reset_hc(struct pci_dev *pdev, unsigned long base)
642 /* Turn off PIRQ enable and SMI enable. (This also turns off the
643 * BIOS's USB Legacy Support.) Turn off all the R/WC bits too.
645 pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC);
647 /* Reset the HC - this will force us to get a
648 * new notification of any already connected
649 * ports due to the virtual disconnect that it
652 outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD);
655 if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET)
656 dev_warn(&pdev->dev, "HCRESET not completed yet!\n");
658 /* Just to be safe, disable interrupt requests and
659 * make sure the controller is stopped.
661 outw(0, base + UHCI_USBINTR);
662 outw(0, base + UHCI_USBCMD);
664 EXPORT_SYMBOL_GPL(uhci_reset_hc);
667 * Initialize a controller that was newly discovered or has just been
668 * resumed. In either case we can't be sure of its previous state.
670 * Returns: 1 if the controller was reset, 0 otherwise.
672 int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base)
675 unsigned int cmd, intr;
678 * When restarting a suspended controller, we expect all the
679 * settings to be the same as we left them:
681 * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP;
682 * Controller is stopped and configured with EGSM set;
683 * No interrupts enabled except possibly Resume Detect.
685 * If any of these conditions are violated we do a complete reset.
687 pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup);
688 if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) {
689 dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n",
694 cmd = inw(base + UHCI_USBCMD);
695 if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) ||
696 !(cmd & UHCI_USBCMD_EGSM)) {
697 dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n",
702 intr = inw(base + UHCI_USBINTR);
703 if (intr & (~UHCI_USBINTR_RESUME)) {
704 dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n",
711 dev_dbg(&pdev->dev, "Performing full reset\n");
712 uhci_reset_hc(pdev, base);
715 EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc);
717 static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
720 return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask);
723 #define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO)
724 #define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY)
726 static void quirk_usb_handoff_uhci(struct pci_dev *pdev)
728 unsigned long base = 0;
731 if (!pio_enabled(pdev))
734 for (i = 0; i < PCI_STD_NUM_BARS; i++)
735 if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
736 base = pci_resource_start(pdev, i);
741 uhci_check_and_reset_hc(pdev, base);
744 static int mmio_resource_enabled(struct pci_dev *pdev, int idx)
746 return pci_resource_start(pdev, idx) && mmio_enabled(pdev);
749 static void quirk_usb_handoff_ohci(struct pci_dev *pdev)
754 bool no_fminterval = false;
757 if (!mmio_resource_enabled(pdev, 0))
760 base = pci_ioremap_bar(pdev, 0);
765 * ULi M5237 OHCI controller locks the whole system when accessing
766 * the OHCI_FMINTERVAL offset.
768 if (pdev->vendor == PCI_VENDOR_ID_AL && pdev->device == 0x5237)
769 no_fminterval = true;
771 control = readl(base + OHCI_CONTROL);
773 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
775 #define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR)
777 #define OHCI_CTRL_MASK OHCI_CTRL_RWC
779 if (control & OHCI_CTRL_IR) {
780 int wait_time = 500; /* arbitrary; 5 seconds */
781 writel(OHCI_INTR_OC, base + OHCI_INTRENABLE);
782 writel(OHCI_OCR, base + OHCI_CMDSTATUS);
783 while (wait_time > 0 &&
784 readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) {
790 "OHCI: BIOS handoff failed (BIOS bug?) %08x\n",
791 readl(base + OHCI_CONTROL));
795 /* disable interrupts */
796 writel((u32) ~0, base + OHCI_INTRDISABLE);
798 /* Go into the USB_RESET state, preserving RWC (and possibly IR) */
799 writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL);
800 readl(base + OHCI_CONTROL);
802 /* software reset of the controller, preserving HcFmInterval */
804 fminterval = readl(base + OHCI_FMINTERVAL);
806 writel(OHCI_HCR, base + OHCI_CMDSTATUS);
808 /* reset requires max 10 us delay */
809 for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */
810 if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0)
816 writel(fminterval, base + OHCI_FMINTERVAL);
818 /* Now the controller is safely in SUSPEND and nothing can wake it up */
822 static const struct dmi_system_id ehci_dmi_nohandoff_table[] = {
824 /* Pegatron Lucid (ExoPC) */
826 DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"),
827 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"),
831 /* Pegatron Lucid (Ordissimo AIRIS) */
833 DMI_MATCH(DMI_BOARD_NAME, "M11JB"),
834 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
838 /* Pegatron Lucid (Ordissimo) */
840 DMI_MATCH(DMI_BOARD_NAME, "Ordissimo"),
841 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
847 DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"),
848 DMI_MATCH(DMI_BOARD_NAME, "E210"),
849 DMI_MATCH(DMI_BIOS_VERSION, "6.00"),
855 static void ehci_bios_handoff(struct pci_dev *pdev,
856 void __iomem *op_reg_base,
859 int try_handoff = 1, tried_handoff = 0;
862 * The Pegatron Lucid tablet sporadically waits for 98 seconds trying
863 * the handoff on its unused controller. Skip it.
865 * The HASEE E200 hangs when the semaphore is set (bugzilla #77021).
867 if (pdev->vendor == 0x8086 && (pdev->device == 0x283a ||
868 pdev->device == 0x27cc)) {
869 if (dmi_check_system(ehci_dmi_nohandoff_table))
873 if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) {
874 dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n");
878 * but that seems dubious in general (the BIOS left it off intentionally)
879 * and is known to prevent some systems from booting. so we won't do this
880 * unless maybe we can determine when we're on a system that needs SMI forced.
882 /* BIOS workaround (?): be sure the pre-Linux code
885 pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val);
886 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS,
887 val | EHCI_USBLEGCTLSTS_SOOE);
890 /* some systems get upset if this semaphore is
891 * set for any other reason than forcing a BIOS
894 pci_write_config_byte(pdev, offset + 3, 1);
897 /* if boot firmware now owns EHCI, spin till it hands it over. */
900 while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) {
904 pci_read_config_dword(pdev, offset, &cap);
908 if (cap & EHCI_USBLEGSUP_BIOS) {
909 /* well, possibly buggy BIOS... try to shut it down,
910 * and hope nothing goes too wrong
914 "EHCI: BIOS handoff failed (BIOS bug?) %08x\n",
916 pci_write_config_byte(pdev, offset + 2, 0);
919 /* just in case, always disable EHCI SMIs */
920 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0);
922 /* If the BIOS ever owned the controller then we can't expect
923 * any power sessions to remain intact.
926 writel(0, op_reg_base + EHCI_CONFIGFLAG);
929 static void quirk_usb_disable_ehci(struct pci_dev *pdev)
931 void __iomem *base, *op_reg_base;
932 u32 hcc_params, cap, val;
933 u8 offset, cap_length;
934 int wait_time, count = 256/4;
936 if (!mmio_resource_enabled(pdev, 0))
939 base = pci_ioremap_bar(pdev, 0);
943 cap_length = readb(base);
944 op_reg_base = base + cap_length;
946 /* EHCI 0.96 and later may have "extended capabilities"
947 * spec section 5.1 explains the bios handoff, e.g. for
948 * booting from USB disk or using a usb keyboard
950 hcc_params = readl(base + EHCI_HCC_PARAMS);
951 offset = (hcc_params >> 8) & 0xff;
952 while (offset && --count) {
953 pci_read_config_dword(pdev, offset, &cap);
955 switch (cap & 0xff) {
957 ehci_bios_handoff(pdev, op_reg_base, cap, offset);
959 case 0: /* Illegal reserved cap, set cap=0 so we exit */
964 "EHCI: unrecognized capability %02x\n",
967 offset = (cap >> 8) & 0xff;
970 dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n");
973 * halt EHCI & disable its interrupts in any case
975 val = readl(op_reg_base + EHCI_USBSTS);
976 if ((val & EHCI_USBSTS_HALTED) == 0) {
977 val = readl(op_reg_base + EHCI_USBCMD);
978 val &= ~EHCI_USBCMD_RUN;
979 writel(val, op_reg_base + EHCI_USBCMD);
983 writel(0x3f, op_reg_base + EHCI_USBSTS);
986 val = readl(op_reg_base + EHCI_USBSTS);
987 if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) {
990 } while (wait_time > 0);
992 writel(0, op_reg_base + EHCI_USBINTR);
993 writel(0x3f, op_reg_base + EHCI_USBSTS);
999 * handshake - spin reading a register until handshake completes
1000 * @ptr: address of hc register to be read
1001 * @mask: bits to look at in result of read
1002 * @done: value of those bits when handshake succeeds
1003 * @wait_usec: timeout in microseconds
1004 * @delay_usec: delay in microseconds to wait between polling
1006 * Polls a register every delay_usec microseconds.
1007 * Returns 0 when the mask bits have the value done.
1008 * Returns -ETIMEDOUT if this condition is not true after
1009 * wait_usec microseconds have passed.
1011 static int handshake(void __iomem *ptr, u32 mask, u32 done,
1012 int wait_usec, int delay_usec)
1016 return readl_poll_timeout_atomic(ptr, result,
1017 ((result & mask) == done),
1018 delay_usec, wait_usec);
1022 * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that
1023 * share some number of ports. These ports can be switched between either
1024 * controller. Not all of the ports under the EHCI host controller may be
1027 * The ports should be switched over to xHCI before PCI probes for any device
1028 * start. This avoids active devices under EHCI being disconnected during the
1029 * port switchover, which could cause loss of data on USB storage devices, or
1030 * failed boot when the root file system is on a USB mass storage device and is
1031 * enumerated under EHCI first.
1033 * We write into the xHC's PCI configuration space in some Intel-specific
1034 * registers to switch the ports over. The USB 3.0 terminations and the USB
1035 * 2.0 data wires are switched separately. We want to enable the SuperSpeed
1036 * terminations before switching the USB 2.0 wires over, so that USB 3.0
1037 * devices connect at SuperSpeed, rather than at USB 2.0 speeds.
1039 void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev)
1041 u32 ports_available;
1042 bool ehci_found = false;
1043 struct pci_dev *companion = NULL;
1045 /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of
1046 * switching ports from EHCI to xHCI
1048 if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY &&
1049 xhci_pdev->subsystem_device == 0x90a8)
1052 /* make sure an intel EHCI controller exists */
1053 for_each_pci_dev(companion) {
1054 if (companion->class == PCI_CLASS_SERIAL_USB_EHCI &&
1055 companion->vendor == PCI_VENDOR_ID_INTEL) {
1064 /* Don't switchover the ports if the user hasn't compiled the xHCI
1065 * driver. Otherwise they will see "dead" USB ports that don't power
1068 if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) {
1069 dev_warn(&xhci_pdev->dev,
1070 "CONFIG_USB_XHCI_HCD is turned off, defaulting to EHCI.\n");
1071 dev_warn(&xhci_pdev->dev,
1072 "USB 3.0 devices will work at USB 2.0 speeds.\n");
1073 usb_disable_xhci_ports(xhci_pdev);
1077 /* Read USB3PRM, the USB 3.0 Port Routing Mask Register
1078 * Indicate the ports that can be changed from OS.
1080 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM,
1083 dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n",
1086 /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable
1087 * Register, to turn on SuperSpeed terminations for the
1090 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
1093 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
1095 dev_dbg(&xhci_pdev->dev,
1096 "USB 3.0 ports that are now enabled under xHCI: 0x%x\n",
1099 /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register
1100 * Indicate the USB 2.0 ports to be controlled by the xHCI host.
1103 pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM,
1106 dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n",
1109 /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to
1110 * switch the USB 2.0 power and data lines over to the xHCI
1113 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1116 pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1118 dev_dbg(&xhci_pdev->dev,
1119 "USB 2.0 ports that are now switched over to xHCI: 0x%x\n",
1122 EXPORT_SYMBOL_GPL(usb_enable_intel_xhci_ports);
1124 void usb_disable_xhci_ports(struct pci_dev *xhci_pdev)
1126 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0);
1127 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0);
1129 EXPORT_SYMBOL_GPL(usb_disable_xhci_ports);
1132 * PCI Quirks for xHCI.
1134 * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
1135 * It signals to the BIOS that the OS wants control of the host controller,
1136 * and then waits 1 second for the BIOS to hand over control.
1137 * If we timeout, assume the BIOS is broken and take control anyway.
1139 static void quirk_usb_handoff_xhci(struct pci_dev *pdev)
1143 void __iomem *op_reg_base;
1146 int len = pci_resource_len(pdev, 0);
1148 if (!mmio_resource_enabled(pdev, 0))
1151 base = ioremap(pci_resource_start(pdev, 0), len);
1156 * Find the Legacy Support Capability register -
1157 * this is optional for xHCI host controllers.
1159 ext_cap_offset = xhci_find_next_ext_cap(base, 0, XHCI_EXT_CAPS_LEGACY);
1161 if (!ext_cap_offset)
1164 if ((ext_cap_offset + sizeof(val)) > len) {
1165 /* We're reading garbage from the controller */
1166 dev_warn(&pdev->dev, "xHCI controller failing to respond");
1169 val = readl(base + ext_cap_offset);
1171 /* Auto handoff never worked for these devices. Force it and continue */
1172 if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) ||
1173 (pdev->vendor == PCI_VENDOR_ID_RENESAS
1174 && pdev->device == 0x0014)) {
1175 val = (val | XHCI_HC_OS_OWNED) & ~XHCI_HC_BIOS_OWNED;
1176 writel(val, base + ext_cap_offset);
1179 /* If the BIOS owns the HC, signal that the OS wants it, and wait */
1180 if (val & XHCI_HC_BIOS_OWNED) {
1181 writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset);
1183 /* Wait for 1 second with 10 microsecond polling interval */
1184 timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
1187 /* Assume a buggy BIOS and take HC ownership anyway */
1189 dev_warn(&pdev->dev,
1190 "xHCI BIOS handoff failed (BIOS bug ?) %08x\n",
1192 writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset);
1196 val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
1197 /* Mask off (turn off) any enabled SMIs */
1198 val &= XHCI_LEGACY_DISABLE_SMI;
1199 /* Mask all SMI events bits, RW1C */
1200 val |= XHCI_LEGACY_SMI_EVENTS;
1201 /* Disable any BIOS SMIs and clear all SMI events*/
1202 writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
1205 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
1206 usb_enable_intel_xhci_ports(pdev);
1208 op_reg_base = base + XHCI_HC_LENGTH(readl(base));
1210 /* Wait for the host controller to be ready before writing any
1211 * operational or runtime registers. Wait 5 seconds and no more.
1213 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
1215 /* Assume a buggy HC and start HC initialization anyway */
1217 val = readl(op_reg_base + XHCI_STS_OFFSET);
1218 dev_warn(&pdev->dev,
1219 "xHCI HW not ready after 5 sec (HC bug?) status = 0x%x\n",
1223 /* Send the halt and disable interrupts command */
1224 val = readl(op_reg_base + XHCI_CMD_OFFSET);
1225 val &= ~(XHCI_CMD_RUN | XHCI_IRQS);
1226 writel(val, op_reg_base + XHCI_CMD_OFFSET);
1228 /* Wait for the HC to halt - poll every 125 usec (one microframe). */
1229 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1,
1230 XHCI_MAX_HALT_USEC, 125);
1232 val = readl(op_reg_base + XHCI_STS_OFFSET);
1233 dev_warn(&pdev->dev,
1234 "xHCI HW did not halt within %d usec status = 0x%x\n",
1235 XHCI_MAX_HALT_USEC, val);
1242 static void quirk_usb_early_handoff(struct pci_dev *pdev)
1244 struct device_node *parent;
1247 /* Skip Netlogic mips SoC's internal PCI USB controller.
1248 * This device does not need/support EHCI/OHCI handoff
1250 if (pdev->vendor == 0x184e) /* vendor Netlogic */
1254 * Bypass the Raspberry Pi 4 controller xHCI controller, things are
1255 * taken care of by the board's co-processor.
1257 if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) {
1258 parent = of_get_parent(pdev->bus->dev.of_node);
1259 is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie");
1260 of_node_put(parent);
1265 if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&
1266 pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&
1267 pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
1268 pdev->class != PCI_CLASS_SERIAL_USB_XHCI)
1271 if (pci_enable_device(pdev) < 0) {
1272 dev_warn(&pdev->dev,
1273 "Can't enable PCI device, BIOS handoff failed.\n");
1276 if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)
1277 quirk_usb_handoff_uhci(pdev);
1278 else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)
1279 quirk_usb_handoff_ohci(pdev);
1280 else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)
1281 quirk_usb_disable_ehci(pdev);
1282 else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)
1283 quirk_usb_handoff_xhci(pdev);
1284 pci_disable_device(pdev);
1286 DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
1287 PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff);