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.
22 #include "pci-quirks.h"
23 #include "xhci-ext-caps.h"
146  * amd_chipset_sb_type_init - initialize amd chipset southbridge type
156 	pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN;  in amd_chipset_sb_type_init()
158 	pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,  in amd_chipset_sb_type_init()
160 	if (pinfo->smbus_dev) {  in amd_chipset_sb_type_init()
161 		rev = pinfo->smbus_dev->revision;  in amd_chipset_sb_type_init()
163 			pinfo->sb_type.gen = AMD_CHIPSET_SB600;  in amd_chipset_sb_type_init()
165 			pinfo->sb_type.gen = AMD_CHIPSET_SB700;  in amd_chipset_sb_type_init()
167 			pinfo->sb_type.gen = AMD_CHIPSET_SB800;  in amd_chipset_sb_type_init()
169 		pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,  in amd_chipset_sb_type_init()
172 		if (pinfo->smbus_dev) {  in amd_chipset_sb_type_init()
173 			rev = pinfo->smbus_dev->revision;  in amd_chipset_sb_type_init()
175 				pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;  in amd_chipset_sb_type_init()
177 				pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;  in amd_chipset_sb_type_init()
179 				pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;  in amd_chipset_sb_type_init()
181 			pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,  in amd_chipset_sb_type_init()
183 			if (pinfo->smbus_dev) {  in amd_chipset_sb_type_init()
184 				rev = pinfo->smbus_dev->revision;  in amd_chipset_sb_type_init()
185 				pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;  in amd_chipset_sb_type_init()
187 				pinfo->sb_type.gen = NOT_AMD_CHIPSET;  in amd_chipset_sb_type_init()
192 	pinfo->sb_type.rev = rev;  in amd_chipset_sb_type_init()
198 	u16 misc;  in sb800_prefetch()  local
201 	pci_read_config_word(pdev, 0x50, &misc);  in sb800_prefetch()
203 		pci_write_config_word(pdev, 0x50, misc & 0xfcff);  in sb800_prefetch()
205 		pci_write_config_word(pdev, 0x50, misc | 0x0300);  in sb800_prefetch()
271 		/* race - someone else was faster - drop devices */  in usb_amd_find_chipset_info()
282 		/* no race - commit the result */  in usb_amd_find_chipset_info()
295 		dev_dbg(&pdev->dev, "QUIRK: Enable AMD remote wakeup fix\n");  in usb_hcd_amd_remote_wakeup_quirk()
318 	/* SB800 needs pre-fetch fix */  in usb_amd_prefetch_quirk()
331  * The hardware normally enables the A-link power management feature, which
334  * This USB quirk prevents the link going into that lower power state
355 		amd_chipset.isoc_reqs--;  in usb_amd_quirk_pll()
476 	amd_chipset.probe_count--;  in usb_amd_dev_put()
510 	u16 reg;  in usb_amd_pt_check_port()  local
538 	switch (pdev->device) {  in usb_amd_pt_check_port()
547 			reg = PT4_P2_REG;  in usb_amd_pt_check_port()
548 			port_shift = port - 7;  in usb_amd_pt_check_port()
550 			reg = PT4_P1_REG;  in usb_amd_pt_check_port()
561 			reg = PT2_P2_REG;  in usb_amd_pt_check_port()
562 			port_shift = port - 3;  in usb_amd_pt_check_port()
564 			reg = PT2_P1_REG;  in usb_amd_pt_check_port()
575 			reg = PT1_P2_REG;  in usb_amd_pt_check_port()
576 			port_shift = port - 4;  in usb_amd_pt_check_port()
578 			reg = PT1_P1_REG;  in usb_amd_pt_check_port()
585 	pci_write_config_word(pdev, PT_ADDR_INDX, reg);  in usb_amd_pt_check_port()
598 	for (retry_count = 1000; retry_count > 0; --retry_count) {  in usb_asmedia_wait_write()
603 			dev_err(&pdev->dev, "%s: check_ready ERROR", __func__);  in usb_asmedia_wait_write()
604 			return -EIO;  in usb_asmedia_wait_write()
613 	dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__);  in usb_asmedia_wait_write()
614 	return -ETIMEDOUT;  in usb_asmedia_wait_write()
654 	 * BIOS's USB Legacy Support.)  Turn off all the R/WC bits too.  in uhci_reset_hc()
658 	/* Reset the HC - this will force us to get a  in uhci_reset_hc()
667 		dev_warn(&pdev->dev, "HCRESET not completed yet!\n");  in uhci_reset_hc()
700 		dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n",  in uhci_check_and_reset_hc()
708 		dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n",  in uhci_check_and_reset_hc()
715 		dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n",  in uhci_check_and_reset_hc()
722 	dev_dbg(&pdev->dev, "Performing full reset\n");  in uhci_check_and_reset_hc()
778 	if (pdev->vendor == PCI_VENDOR_ID_AL && pdev->device == 0x5237)  in quirk_usb_handoff_ohci()
783 /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */  in quirk_usb_handoff_ohci()
795 			wait_time -= 10;  in quirk_usb_handoff_ohci()
799 			dev_warn(&pdev->dev,  in quirk_usb_handoff_ohci()
819 	for (cnt = 30; cnt > 0; --cnt) {	/* ... allow extra time */  in quirk_usb_handoff_ohci()
837 			DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"),
844 			DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
851 			DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
877 	if (pdev->vendor == 0x8086 && (pdev->device == 0x283a ||  in ehci_bios_handoff()
878 			pdev->device == 0x27cc)) {  in ehci_bios_handoff()
884 		dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n");  in ehci_bios_handoff()
892 		/* BIOS workaround (?): be sure the pre-Linux code  in ehci_bios_handoff()
913 			msec -= 10;  in ehci_bios_handoff()
923 			dev_warn(&pdev->dev,  in ehci_bios_handoff()
958 	 * booting from USB disk or using a usb keyboard  in quirk_usb_disable_ehci()
967 	if (pdev->vendor == PCI_VENDOR_ID_LOONGSON && pdev->device == 0x7a14)  in quirk_usb_disable_ehci()
971 	while (offset && --count) {  in quirk_usb_disable_ehci()
982 			dev_warn(&pdev->dev,  in quirk_usb_disable_ehci()
989 		dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n");  in quirk_usb_disable_ehci()
1004 			wait_time -= 100;  in quirk_usb_disable_ehci()
1018  * handshake - spin reading a register until handshake completes
1027  * Returns -ETIMEDOUT if this condition is not true after
1048  * port switchover, which could cause loss of data on USB storage devices, or
1049  * failed boot when the root file system is on a USB mass storage device and is
1052  * We write into the xHC's PCI configuration space in some Intel-specific
1053  * registers to switch the ports over.  The USB 3.0 terminations and the USB
1055  * terminations before switching the USB 2.0 wires over, so that USB 3.0
1056  * devices connect at SuperSpeed, rather than at USB 2.0 speeds.
1064 	/* Sony VAIO t-series with subsystem device ID 90a8 is not capable of  in usb_enable_intel_xhci_ports()
1067 	if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY &&  in usb_enable_intel_xhci_ports()
1068 	    xhci_pdev->subsystem_device == 0x90a8)  in usb_enable_intel_xhci_ports()
1073 		if (companion->class == PCI_CLASS_SERIAL_USB_EHCI &&  in usb_enable_intel_xhci_ports()
1074 		    companion->vendor == PCI_VENDOR_ID_INTEL) {  in usb_enable_intel_xhci_ports()
1084 	 * driver.  Otherwise they will see "dead" USB ports that don't power  in usb_enable_intel_xhci_ports()
1088 		dev_warn(&xhci_pdev->dev,  in usb_enable_intel_xhci_ports()
1090 		dev_warn(&xhci_pdev->dev,  in usb_enable_intel_xhci_ports()
1091 				"USB 3.0 devices will work at USB 2.0 speeds.\n");  in usb_enable_intel_xhci_ports()
1096 	/* Read USB3PRM, the USB 3.0 Port Routing Mask Register  in usb_enable_intel_xhci_ports()
1102 	dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n",  in usb_enable_intel_xhci_ports()
1105 	/* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable  in usb_enable_intel_xhci_ports()
1114 	dev_dbg(&xhci_pdev->dev,  in usb_enable_intel_xhci_ports()
1115 		"USB 3.0 ports that are now enabled under xHCI: 0x%x\n",  in usb_enable_intel_xhci_ports()
1118 	/* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register  in usb_enable_intel_xhci_ports()
1119 	 * Indicate the USB 2.0 ports to be controlled by the xHCI host.  in usb_enable_intel_xhci_ports()
1125 	dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n",  in usb_enable_intel_xhci_ports()
1128 	/* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to  in usb_enable_intel_xhci_ports()
1129 	 * switch the USB 2.0 power and data lines over to the xHCI  in usb_enable_intel_xhci_ports()
1137 	dev_dbg(&xhci_pdev->dev,  in usb_enable_intel_xhci_ports()
1138 		"USB 2.0 ports that are now switched over to xHCI: 0x%x\n",  in usb_enable_intel_xhci_ports()
1153  * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
1175 	 * Find the Legacy Support Capability register -  in quirk_usb_handoff_xhci()
1185 		dev_warn(&pdev->dev, "xHCI controller failing to respond");  in quirk_usb_handoff_xhci()
1191 	if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) ||  in quirk_usb_handoff_xhci()
1192 			(pdev->vendor == PCI_VENDOR_ID_RENESAS  in quirk_usb_handoff_xhci()
1193 			 && pdev->device == 0x0014)) {  in quirk_usb_handoff_xhci()
1208 			dev_warn(&pdev->dev,  in quirk_usb_handoff_xhci()
1224 	if (pdev->vendor == PCI_VENDOR_ID_INTEL)  in quirk_usb_handoff_xhci()
1237 		dev_warn(&pdev->dev,  in quirk_usb_handoff_xhci()
1247 	/* Wait for the HC to halt - poll every 125 usec (one microframe). */  in quirk_usb_handoff_xhci()
1252 		dev_warn(&pdev->dev,  in quirk_usb_handoff_xhci()
1266 	/* Skip Netlogic mips SoC's internal PCI USB controller.  in quirk_usb_early_handoff()
1269 	if (pdev->vendor == 0x184e)	/* vendor Netlogic */  in quirk_usb_early_handoff()
1274 	 * taken care of by the board's co-processor.  in quirk_usb_early_handoff()
1276 	if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) {  in quirk_usb_early_handoff()
1277 		parent = of_get_parent(pdev->bus->dev.of_node);  in quirk_usb_early_handoff()
1278 		is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie");  in quirk_usb_early_handoff()
1284 	if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&  in quirk_usb_early_handoff()
1285 			pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&  in quirk_usb_early_handoff()
1286 			pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&  in quirk_usb_early_handoff()
1287 			pdev->class != PCI_CLASS_SERIAL_USB_XHCI)  in quirk_usb_early_handoff()
1291 		dev_warn(&pdev->dev,  in quirk_usb_early_handoff()
1295 	if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)  in quirk_usb_early_handoff()
1297 	else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)  in quirk_usb_early_handoff()
1299 	else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)  in quirk_usb_early_handoff()
1301 	else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)  in quirk_usb_early_handoff()