David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file contains code to reset and initialize USB host controllers. |
| 3 | * Some of it includes work-arounds for PCI hardware and BIOS quirks. |
| 4 | * It may need to run early during booting -- before USB would normally |
| 5 | * initialize -- to ensure that Linux doesn't use any legacy modes. |
| 6 | * |
| 7 | * Copyright (c) 1999 Martin Mares <mj@ucw.cz> |
| 8 | * (and others) |
| 9 | */ |
| 10 | |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 11 | #include <linux/types.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/pci.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/delay.h> |
Paul Gortmaker | f940fcd | 2011-05-27 09:56:31 -0400 | [diff] [blame] | 16 | #include <linux/export.h> |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 17 | #include <linux/acpi.h> |
Andy Ross | 3610ea5 | 2011-05-11 15:52:38 -0700 | [diff] [blame] | 18 | #include <linux/dmi.h> |
Adrian Bunk | 75e2df6 | 2006-03-25 18:01:53 +0100 | [diff] [blame] | 19 | #include "pci-quirks.h" |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 20 | #include "xhci-ext-caps.h" |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 21 | |
| 22 | |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 23 | #define UHCI_USBLEGSUP 0xc0 /* legacy support */ |
| 24 | #define UHCI_USBCMD 0 /* command register */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 25 | #define UHCI_USBINTR 4 /* interrupt register */ |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 26 | #define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */ |
| 27 | #define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */ |
| 28 | #define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */ |
| 29 | #define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */ |
| 30 | #define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */ |
| 31 | #define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */ |
| 32 | #define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 33 | |
| 34 | #define OHCI_CONTROL 0x04 |
| 35 | #define OHCI_CMDSTATUS 0x08 |
| 36 | #define OHCI_INTRSTATUS 0x0c |
| 37 | #define OHCI_INTRENABLE 0x10 |
| 38 | #define OHCI_INTRDISABLE 0x14 |
Alan Stern | 6ea12a0 | 2011-07-15 17:22:15 -0400 | [diff] [blame] | 39 | #define OHCI_FMINTERVAL 0x34 |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 40 | #define OHCI_HCFS (3 << 6) /* hc functional state */ |
Alan Stern | 6ea12a0 | 2011-07-15 17:22:15 -0400 | [diff] [blame] | 41 | #define OHCI_HCR (1 << 0) /* host controller reset */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 42 | #define OHCI_OCR (1 << 3) /* ownership change request */ |
David Brownell | f2cb36c | 2005-09-22 22:43:30 -0700 | [diff] [blame] | 43 | #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 44 | #define OHCI_CTRL_IR (1 << 8) /* interrupt routing */ |
| 45 | #define OHCI_INTR_OC (1 << 30) /* ownership change */ |
| 46 | |
| 47 | #define EHCI_HCC_PARAMS 0x08 /* extended capabilities */ |
| 48 | #define EHCI_USBCMD 0 /* command register */ |
| 49 | #define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */ |
| 50 | #define EHCI_USBSTS 4 /* status register */ |
| 51 | #define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */ |
| 52 | #define EHCI_USBINTR 8 /* interrupt register */ |
Alan Stern | 4fe5354 | 2007-04-05 16:06:53 -0400 | [diff] [blame] | 53 | #define EHCI_CONFIGFLAG 0x40 /* configured flag register */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 54 | #define EHCI_USBLEGSUP 0 /* legacy support register */ |
| 55 | #define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */ |
| 56 | #define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */ |
| 57 | #define EHCI_USBLEGCTLSTS 4 /* legacy control/status */ |
| 58 | #define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */ |
| 59 | |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 60 | /* AMD quirk use */ |
| 61 | #define AB_REG_BAR_LOW 0xe0 |
| 62 | #define AB_REG_BAR_HIGH 0xe1 |
| 63 | #define AB_REG_BAR_SB700 0xf0 |
| 64 | #define AB_INDX(addr) ((addr) + 0x00) |
| 65 | #define AB_DATA(addr) ((addr) + 0x04) |
| 66 | #define AX_INDXC 0x30 |
| 67 | #define AX_DATAC 0x34 |
| 68 | |
| 69 | #define NB_PCIE_INDX_ADDR 0xe0 |
| 70 | #define NB_PCIE_INDX_DATA 0xe4 |
| 71 | #define PCIE_P_CNTL 0x10040 |
| 72 | #define BIF_NB 0x10002 |
| 73 | #define NB_PIF0_PWRDOWN_0 0x01100012 |
| 74 | #define NB_PIF0_PWRDOWN_1 0x01100013 |
| 75 | |
Sarah Sharp | 69e848c | 2011-02-22 09:57:15 -0800 | [diff] [blame] | 76 | #define USB_INTEL_XUSB2PR 0xD0 |
| 77 | #define USB_INTEL_USB3_PSSEN 0xD8 |
| 78 | |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 79 | static struct amd_chipset_info { |
| 80 | struct pci_dev *nb_dev; |
| 81 | struct pci_dev *smbus_dev; |
| 82 | int nb_type; |
| 83 | int sb_type; |
| 84 | int isoc_reqs; |
| 85 | int probe_count; |
| 86 | int probe_result; |
| 87 | } amd_chipset; |
| 88 | |
| 89 | static DEFINE_SPINLOCK(amd_lock); |
| 90 | |
| 91 | int usb_amd_find_chipset_info(void) |
| 92 | { |
| 93 | u8 rev = 0; |
| 94 | unsigned long flags; |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 95 | struct amd_chipset_info info; |
| 96 | int ret; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 97 | |
| 98 | spin_lock_irqsave(&amd_lock, flags); |
| 99 | |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 100 | /* probe only once */ |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 101 | if (amd_chipset.probe_count > 0) { |
| 102 | amd_chipset.probe_count++; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 103 | spin_unlock_irqrestore(&amd_lock, flags); |
| 104 | return amd_chipset.probe_result; |
| 105 | } |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 106 | memset(&info, 0, sizeof(info)); |
| 107 | spin_unlock_irqrestore(&amd_lock, flags); |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 108 | |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 109 | info.smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL); |
| 110 | if (info.smbus_dev) { |
| 111 | rev = info.smbus_dev->revision; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 112 | if (rev >= 0x40) |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 113 | info.sb_type = 1; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 114 | else if (rev >= 0x30 && rev <= 0x3b) |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 115 | info.sb_type = 3; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 116 | } else { |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 117 | info.smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, |
| 118 | 0x780b, NULL); |
| 119 | if (!info.smbus_dev) { |
| 120 | ret = 0; |
| 121 | goto commit; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 122 | } |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 123 | |
| 124 | rev = info.smbus_dev->revision; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 125 | if (rev >= 0x11 && rev <= 0x18) |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 126 | info.sb_type = 2; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 127 | } |
| 128 | |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 129 | if (info.sb_type == 0) { |
| 130 | if (info.smbus_dev) { |
| 131 | pci_dev_put(info.smbus_dev); |
| 132 | info.smbus_dev = NULL; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 133 | } |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 134 | ret = 0; |
| 135 | goto commit; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 136 | } |
| 137 | |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 138 | info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL); |
| 139 | if (info.nb_dev) { |
| 140 | info.nb_type = 1; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 141 | } else { |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 142 | info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL); |
| 143 | if (info.nb_dev) { |
| 144 | info.nb_type = 2; |
| 145 | } else { |
| 146 | info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, |
| 147 | 0x9600, NULL); |
| 148 | if (info.nb_dev) |
| 149 | info.nb_type = 3; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 150 | } |
| 151 | } |
| 152 | |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 153 | ret = info.probe_result = 1; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 154 | printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n"); |
| 155 | |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 156 | commit: |
| 157 | |
| 158 | spin_lock_irqsave(&amd_lock, flags); |
| 159 | if (amd_chipset.probe_count > 0) { |
| 160 | /* race - someone else was faster - drop devices */ |
| 161 | |
| 162 | /* Mark that we where here */ |
| 163 | amd_chipset.probe_count++; |
| 164 | ret = amd_chipset.probe_result; |
| 165 | |
| 166 | spin_unlock_irqrestore(&amd_lock, flags); |
| 167 | |
| 168 | if (info.nb_dev) |
| 169 | pci_dev_put(info.nb_dev); |
| 170 | if (info.smbus_dev) |
| 171 | pci_dev_put(info.smbus_dev); |
| 172 | |
| 173 | } else { |
| 174 | /* no race - commit the result */ |
| 175 | info.probe_count++; |
| 176 | amd_chipset = info; |
| 177 | spin_unlock_irqrestore(&amd_lock, flags); |
| 178 | } |
| 179 | |
| 180 | return ret; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 181 | } |
| 182 | EXPORT_SYMBOL_GPL(usb_amd_find_chipset_info); |
| 183 | |
| 184 | /* |
| 185 | * The hardware normally enables the A-link power management feature, which |
| 186 | * lets the system lower the power consumption in idle states. |
| 187 | * |
| 188 | * This USB quirk prevents the link going into that lower power state |
| 189 | * during isochronous transfers. |
| 190 | * |
| 191 | * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of |
| 192 | * some AMD platforms may stutter or have breaks occasionally. |
| 193 | */ |
| 194 | static void usb_amd_quirk_pll(int disable) |
| 195 | { |
| 196 | u32 addr, addr_low, addr_high, val; |
| 197 | u32 bit = disable ? 0 : 1; |
| 198 | unsigned long flags; |
| 199 | |
| 200 | spin_lock_irqsave(&amd_lock, flags); |
| 201 | |
| 202 | if (disable) { |
| 203 | amd_chipset.isoc_reqs++; |
| 204 | if (amd_chipset.isoc_reqs > 1) { |
| 205 | spin_unlock_irqrestore(&amd_lock, flags); |
| 206 | return; |
| 207 | } |
| 208 | } else { |
| 209 | amd_chipset.isoc_reqs--; |
| 210 | if (amd_chipset.isoc_reqs > 0) { |
| 211 | spin_unlock_irqrestore(&amd_lock, flags); |
| 212 | return; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | if (amd_chipset.sb_type == 1 || amd_chipset.sb_type == 2) { |
| 217 | outb_p(AB_REG_BAR_LOW, 0xcd6); |
| 218 | addr_low = inb_p(0xcd7); |
| 219 | outb_p(AB_REG_BAR_HIGH, 0xcd6); |
| 220 | addr_high = inb_p(0xcd7); |
| 221 | addr = addr_high << 8 | addr_low; |
| 222 | |
| 223 | outl_p(0x30, AB_INDX(addr)); |
| 224 | outl_p(0x40, AB_DATA(addr)); |
| 225 | outl_p(0x34, AB_INDX(addr)); |
| 226 | val = inl_p(AB_DATA(addr)); |
| 227 | } else if (amd_chipset.sb_type == 3) { |
| 228 | pci_read_config_dword(amd_chipset.smbus_dev, |
| 229 | AB_REG_BAR_SB700, &addr); |
| 230 | outl(AX_INDXC, AB_INDX(addr)); |
| 231 | outl(0x40, AB_DATA(addr)); |
| 232 | outl(AX_DATAC, AB_INDX(addr)); |
| 233 | val = inl(AB_DATA(addr)); |
| 234 | } else { |
| 235 | spin_unlock_irqrestore(&amd_lock, flags); |
| 236 | return; |
| 237 | } |
| 238 | |
| 239 | if (disable) { |
| 240 | val &= ~0x08; |
| 241 | val |= (1 << 4) | (1 << 9); |
| 242 | } else { |
| 243 | val |= 0x08; |
| 244 | val &= ~((1 << 4) | (1 << 9)); |
| 245 | } |
| 246 | outl_p(val, AB_DATA(addr)); |
| 247 | |
| 248 | if (!amd_chipset.nb_dev) { |
| 249 | spin_unlock_irqrestore(&amd_lock, flags); |
| 250 | return; |
| 251 | } |
| 252 | |
| 253 | if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) { |
| 254 | addr = PCIE_P_CNTL; |
| 255 | pci_write_config_dword(amd_chipset.nb_dev, |
| 256 | NB_PCIE_INDX_ADDR, addr); |
| 257 | pci_read_config_dword(amd_chipset.nb_dev, |
| 258 | NB_PCIE_INDX_DATA, &val); |
| 259 | |
| 260 | val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12)); |
| 261 | val |= bit | (bit << 3) | (bit << 12); |
| 262 | val |= ((!bit) << 4) | ((!bit) << 9); |
| 263 | pci_write_config_dword(amd_chipset.nb_dev, |
| 264 | NB_PCIE_INDX_DATA, val); |
| 265 | |
| 266 | addr = BIF_NB; |
| 267 | pci_write_config_dword(amd_chipset.nb_dev, |
| 268 | NB_PCIE_INDX_ADDR, addr); |
| 269 | pci_read_config_dword(amd_chipset.nb_dev, |
| 270 | NB_PCIE_INDX_DATA, &val); |
| 271 | val &= ~(1 << 8); |
| 272 | val |= bit << 8; |
| 273 | |
| 274 | pci_write_config_dword(amd_chipset.nb_dev, |
| 275 | NB_PCIE_INDX_DATA, val); |
| 276 | } else if (amd_chipset.nb_type == 2) { |
| 277 | addr = NB_PIF0_PWRDOWN_0; |
| 278 | pci_write_config_dword(amd_chipset.nb_dev, |
| 279 | NB_PCIE_INDX_ADDR, addr); |
| 280 | pci_read_config_dword(amd_chipset.nb_dev, |
| 281 | NB_PCIE_INDX_DATA, &val); |
| 282 | if (disable) |
| 283 | val &= ~(0x3f << 7); |
| 284 | else |
| 285 | val |= 0x3f << 7; |
| 286 | |
| 287 | pci_write_config_dword(amd_chipset.nb_dev, |
| 288 | NB_PCIE_INDX_DATA, val); |
| 289 | |
| 290 | addr = NB_PIF0_PWRDOWN_1; |
| 291 | pci_write_config_dword(amd_chipset.nb_dev, |
| 292 | NB_PCIE_INDX_ADDR, addr); |
| 293 | pci_read_config_dword(amd_chipset.nb_dev, |
| 294 | NB_PCIE_INDX_DATA, &val); |
| 295 | if (disable) |
| 296 | val &= ~(0x3f << 7); |
| 297 | else |
| 298 | val |= 0x3f << 7; |
| 299 | |
| 300 | pci_write_config_dword(amd_chipset.nb_dev, |
| 301 | NB_PCIE_INDX_DATA, val); |
| 302 | } |
| 303 | |
| 304 | spin_unlock_irqrestore(&amd_lock, flags); |
| 305 | return; |
| 306 | } |
| 307 | |
| 308 | void usb_amd_quirk_pll_disable(void) |
| 309 | { |
| 310 | usb_amd_quirk_pll(1); |
| 311 | } |
| 312 | EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable); |
| 313 | |
| 314 | void usb_amd_quirk_pll_enable(void) |
| 315 | { |
| 316 | usb_amd_quirk_pll(0); |
| 317 | } |
| 318 | EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable); |
| 319 | |
| 320 | void usb_amd_dev_put(void) |
| 321 | { |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 322 | struct pci_dev *nb, *smbus; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 323 | unsigned long flags; |
| 324 | |
| 325 | spin_lock_irqsave(&amd_lock, flags); |
| 326 | |
| 327 | amd_chipset.probe_count--; |
| 328 | if (amd_chipset.probe_count > 0) { |
| 329 | spin_unlock_irqrestore(&amd_lock, flags); |
| 330 | return; |
| 331 | } |
| 332 | |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 333 | /* save them to pci_dev_put outside of spinlock */ |
| 334 | nb = amd_chipset.nb_dev; |
| 335 | smbus = amd_chipset.smbus_dev; |
| 336 | |
| 337 | amd_chipset.nb_dev = NULL; |
| 338 | amd_chipset.smbus_dev = NULL; |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 339 | amd_chipset.nb_type = 0; |
| 340 | amd_chipset.sb_type = 0; |
| 341 | amd_chipset.isoc_reqs = 0; |
| 342 | amd_chipset.probe_result = 0; |
| 343 | |
| 344 | spin_unlock_irqrestore(&amd_lock, flags); |
Joerg Roedel | 9ab7927 | 2011-04-13 08:38:16 +0200 | [diff] [blame] | 345 | |
| 346 | if (nb) |
| 347 | pci_dev_put(nb); |
| 348 | if (smbus) |
| 349 | pci_dev_put(smbus); |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 350 | } |
| 351 | EXPORT_SYMBOL_GPL(usb_amd_dev_put); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 352 | |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 353 | /* |
| 354 | * Make sure the controller is completely inactive, unable to |
| 355 | * generate interrupts or do DMA. |
| 356 | */ |
| 357 | void uhci_reset_hc(struct pci_dev *pdev, unsigned long base) |
| 358 | { |
| 359 | /* Turn off PIRQ enable and SMI enable. (This also turns off the |
| 360 | * BIOS's USB Legacy Support.) Turn off all the R/WC bits too. |
| 361 | */ |
| 362 | pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC); |
| 363 | |
| 364 | /* Reset the HC - this will force us to get a |
| 365 | * new notification of any already connected |
| 366 | * ports due to the virtual disconnect that it |
| 367 | * implies. |
| 368 | */ |
| 369 | outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD); |
| 370 | mb(); |
| 371 | udelay(5); |
| 372 | if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET) |
| 373 | dev_warn(&pdev->dev, "HCRESET not completed yet!\n"); |
| 374 | |
| 375 | /* Just to be safe, disable interrupt requests and |
| 376 | * make sure the controller is stopped. |
| 377 | */ |
| 378 | outw(0, base + UHCI_USBINTR); |
| 379 | outw(0, base + UHCI_USBCMD); |
| 380 | } |
| 381 | EXPORT_SYMBOL_GPL(uhci_reset_hc); |
| 382 | |
| 383 | /* |
| 384 | * Initialize a controller that was newly discovered or has just been |
| 385 | * resumed. In either case we can't be sure of its previous state. |
| 386 | * |
| 387 | * Returns: 1 if the controller was reset, 0 otherwise. |
| 388 | */ |
| 389 | int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base) |
| 390 | { |
| 391 | u16 legsup; |
| 392 | unsigned int cmd, intr; |
| 393 | |
| 394 | /* |
| 395 | * When restarting a suspended controller, we expect all the |
| 396 | * settings to be the same as we left them: |
| 397 | * |
| 398 | * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP; |
| 399 | * Controller is stopped and configured with EGSM set; |
| 400 | * No interrupts enabled except possibly Resume Detect. |
| 401 | * |
| 402 | * If any of these conditions are violated we do a complete reset. |
| 403 | */ |
| 404 | pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup); |
| 405 | if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) { |
| 406 | dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 407 | __func__, legsup); |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 408 | goto reset_needed; |
| 409 | } |
| 410 | |
| 411 | cmd = inw(base + UHCI_USBCMD); |
| 412 | if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) || |
| 413 | !(cmd & UHCI_USBCMD_EGSM)) { |
| 414 | dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 415 | __func__, cmd); |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 416 | goto reset_needed; |
| 417 | } |
| 418 | |
| 419 | intr = inw(base + UHCI_USBINTR); |
| 420 | if (intr & (~UHCI_USBINTR_RESUME)) { |
| 421 | dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 422 | __func__, intr); |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 423 | goto reset_needed; |
| 424 | } |
| 425 | return 0; |
| 426 | |
| 427 | reset_needed: |
| 428 | dev_dbg(&pdev->dev, "Performing full reset\n"); |
| 429 | uhci_reset_hc(pdev, base); |
| 430 | return 1; |
| 431 | } |
| 432 | EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc); |
| 433 | |
Linus Torvalds | 541ab4a | 2005-10-31 21:12:40 -0800 | [diff] [blame] | 434 | static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask) |
| 435 | { |
| 436 | u16 cmd; |
| 437 | return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask); |
| 438 | } |
| 439 | |
| 440 | #define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO) |
| 441 | #define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY) |
| 442 | |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 443 | static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev) |
| 444 | { |
| 445 | unsigned long base = 0; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 446 | int i; |
| 447 | |
Linus Torvalds | 541ab4a | 2005-10-31 21:12:40 -0800 | [diff] [blame] | 448 | if (!pio_enabled(pdev)) |
| 449 | return; |
| 450 | |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 451 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
| 452 | if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) { |
| 453 | base = pci_resource_start(pdev, i); |
| 454 | break; |
| 455 | } |
| 456 | |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 457 | if (base) |
| 458 | uhci_check_and_reset_hc(pdev, base); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 459 | } |
| 460 | |
Linus Torvalds | 541ab4a | 2005-10-31 21:12:40 -0800 | [diff] [blame] | 461 | static int __devinit mmio_resource_enabled(struct pci_dev *pdev, int idx) |
| 462 | { |
| 463 | return pci_resource_start(pdev, idx) && mmio_enabled(pdev); |
| 464 | } |
| 465 | |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 466 | static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) |
| 467 | { |
| 468 | void __iomem *base; |
Alan Stern | 3df7169 | 2010-09-10 16:37:05 -0400 | [diff] [blame] | 469 | u32 control; |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 470 | u32 fminterval; |
| 471 | int cnt; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 472 | |
Linus Torvalds | 541ab4a | 2005-10-31 21:12:40 -0800 | [diff] [blame] | 473 | if (!mmio_resource_enabled(pdev, 0)) |
| 474 | return; |
| 475 | |
Arjan van de Ven | 8e8ce4b | 2008-10-20 21:46:01 -0700 | [diff] [blame] | 476 | base = pci_ioremap_bar(pdev, 0); |
| 477 | if (base == NULL) |
| 478 | return; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 479 | |
Alan Stern | 3df7169 | 2010-09-10 16:37:05 -0400 | [diff] [blame] | 480 | control = readl(base + OHCI_CONTROL); |
| 481 | |
David Brownell | f2cb36c | 2005-09-22 22:43:30 -0700 | [diff] [blame] | 482 | /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ |
Alan Stern | 3df7169 | 2010-09-10 16:37:05 -0400 | [diff] [blame] | 483 | #ifdef __hppa__ |
| 484 | #define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR) |
| 485 | #else |
| 486 | #define OHCI_CTRL_MASK OHCI_CTRL_RWC |
| 487 | |
David Brownell | f2cb36c | 2005-09-22 22:43:30 -0700 | [diff] [blame] | 488 | if (control & OHCI_CTRL_IR) { |
Kyle McMartin | c1b45f2 | 2006-06-25 18:45:29 -0400 | [diff] [blame] | 489 | int wait_time = 500; /* arbitrary; 5 seconds */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 490 | writel(OHCI_INTR_OC, base + OHCI_INTRENABLE); |
| 491 | writel(OHCI_OCR, base + OHCI_CMDSTATUS); |
| 492 | while (wait_time > 0 && |
| 493 | readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) { |
| 494 | wait_time -= 10; |
| 495 | msleep(10); |
| 496 | } |
David Brownell | f2cb36c | 2005-09-22 22:43:30 -0700 | [diff] [blame] | 497 | if (wait_time <= 0) |
bjorn.helgaas@hp.com | f0fda80 | 2007-12-17 14:09:39 -0700 | [diff] [blame] | 498 | dev_warn(&pdev->dev, "OHCI: BIOS handoff failed" |
| 499 | " (BIOS bug?) %08x\n", |
David Brownell | a38408c | 2006-02-09 16:35:31 -0500 | [diff] [blame] | 500 | readl(base + OHCI_CONTROL)); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 501 | } |
David Brownell | f2cb36c | 2005-09-22 22:43:30 -0700 | [diff] [blame] | 502 | #endif |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 503 | |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 504 | /* disable interrupts */ |
| 505 | writel((u32) ~0, base + OHCI_INTRDISABLE); |
Alan Stern | 6ea12a0 | 2011-07-15 17:22:15 -0400 | [diff] [blame] | 506 | |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 507 | /* Reset the USB bus, if the controller isn't already in RESET */ |
| 508 | if (control & OHCI_HCFS) { |
| 509 | /* Go into RESET, preserving RWC (and possibly IR) */ |
| 510 | writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL); |
| 511 | readl(base + OHCI_CONTROL); |
Alan Stern | 6ea12a0 | 2011-07-15 17:22:15 -0400 | [diff] [blame] | 512 | |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 513 | /* drive bus reset for at least 50 ms (7.1.7.5) */ |
Alan Stern | 6ea12a0 | 2011-07-15 17:22:15 -0400 | [diff] [blame] | 514 | msleep(50); |
Alan Stern | 6ea12a0 | 2011-07-15 17:22:15 -0400 | [diff] [blame] | 515 | } |
Alan Stern | 3df7169 | 2010-09-10 16:37:05 -0400 | [diff] [blame] | 516 | |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 517 | /* software reset of the controller, preserving HcFmInterval */ |
| 518 | fminterval = readl(base + OHCI_FMINTERVAL); |
| 519 | writel(OHCI_HCR, base + OHCI_CMDSTATUS); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 520 | |
Alan Stern | c618759 | 2011-11-17 16:41:45 -0500 | [diff] [blame] | 521 | /* reset requires max 10 us delay */ |
| 522 | for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */ |
| 523 | if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0) |
| 524 | break; |
| 525 | udelay(1); |
| 526 | } |
| 527 | writel(fminterval, base + OHCI_FMINTERVAL); |
| 528 | |
| 529 | /* Now the controller is safely in SUSPEND and nothing can wake it up */ |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 530 | iounmap(base); |
| 531 | } |
| 532 | |
Arnaud Lacombe | a7e6401 | 2011-07-21 13:16:20 -0400 | [diff] [blame] | 533 | static const struct dmi_system_id __devinitconst ehci_dmi_nohandoff_table[] = { |
Anisse Astier | 03c7536 | 2011-07-05 16:38:45 +0200 | [diff] [blame] | 534 | { |
| 535 | /* Pegatron Lucid (ExoPC) */ |
| 536 | .matches = { |
| 537 | DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"), |
| 538 | DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"), |
| 539 | }, |
| 540 | }, |
Anisse Astier | 0c42a4e | 2011-07-05 16:38:46 +0200 | [diff] [blame] | 541 | { |
| 542 | /* Pegatron Lucid (Ordissimo AIRIS) */ |
| 543 | .matches = { |
| 544 | DMI_MATCH(DMI_BOARD_NAME, "M11JB"), |
| 545 | DMI_MATCH(DMI_BIOS_VERSION, "Lucid-GE-133"), |
| 546 | }, |
| 547 | }, |
Anisse Astier | 03c7536 | 2011-07-05 16:38:45 +0200 | [diff] [blame] | 548 | { } |
| 549 | }; |
| 550 | |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 551 | static void __devinit ehci_bios_handoff(struct pci_dev *pdev, |
| 552 | void __iomem *op_reg_base, |
| 553 | u32 cap, u8 offset) |
| 554 | { |
Andy Ross | 3610ea5 | 2011-05-11 15:52:38 -0700 | [diff] [blame] | 555 | int try_handoff = 1, tried_handoff = 0; |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 556 | |
Anisse Astier | 03c7536 | 2011-07-05 16:38:45 +0200 | [diff] [blame] | 557 | /* The Pegatron Lucid tablet sporadically waits for 98 seconds trying |
| 558 | * the handoff on its unused controller. Skip it. */ |
Andy Ross | 3610ea5 | 2011-05-11 15:52:38 -0700 | [diff] [blame] | 559 | if (pdev->vendor == 0x8086 && pdev->device == 0x283a) { |
Anisse Astier | 03c7536 | 2011-07-05 16:38:45 +0200 | [diff] [blame] | 560 | if (dmi_check_system(ehci_dmi_nohandoff_table)) |
Andy Ross | 3610ea5 | 2011-05-11 15:52:38 -0700 | [diff] [blame] | 561 | try_handoff = 0; |
| 562 | } |
| 563 | |
| 564 | if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) { |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 565 | dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n"); |
| 566 | |
| 567 | #if 0 |
| 568 | /* aleksey_gorelov@phoenix.com reports that some systems need SMI forced on, |
| 569 | * but that seems dubious in general (the BIOS left it off intentionally) |
| 570 | * and is known to prevent some systems from booting. so we won't do this |
| 571 | * unless maybe we can determine when we're on a system that needs SMI forced. |
| 572 | */ |
| 573 | /* BIOS workaround (?): be sure the pre-Linux code |
| 574 | * receives the SMI |
| 575 | */ |
| 576 | pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val); |
| 577 | pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, |
| 578 | val | EHCI_USBLEGCTLSTS_SOOE); |
| 579 | #endif |
| 580 | |
| 581 | /* some systems get upset if this semaphore is |
| 582 | * set for any other reason than forcing a BIOS |
| 583 | * handoff.. |
| 584 | */ |
| 585 | pci_write_config_byte(pdev, offset + 3, 1); |
| 586 | } |
| 587 | |
| 588 | /* if boot firmware now owns EHCI, spin till it hands it over. */ |
Andy Ross | 3610ea5 | 2011-05-11 15:52:38 -0700 | [diff] [blame] | 589 | if (try_handoff) { |
| 590 | int msec = 1000; |
| 591 | while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) { |
| 592 | tried_handoff = 1; |
| 593 | msleep(10); |
| 594 | msec -= 10; |
| 595 | pci_read_config_dword(pdev, offset, &cap); |
| 596 | } |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | if (cap & EHCI_USBLEGSUP_BIOS) { |
| 600 | /* well, possibly buggy BIOS... try to shut it down, |
| 601 | * and hope nothing goes too wrong |
| 602 | */ |
Andy Ross | 3610ea5 | 2011-05-11 15:52:38 -0700 | [diff] [blame] | 603 | if (try_handoff) |
| 604 | dev_warn(&pdev->dev, "EHCI: BIOS handoff failed" |
| 605 | " (BIOS bug?) %08x\n", cap); |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 606 | pci_write_config_byte(pdev, offset + 2, 0); |
| 607 | } |
| 608 | |
| 609 | /* just in case, always disable EHCI SMIs */ |
| 610 | pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0); |
| 611 | |
| 612 | /* If the BIOS ever owned the controller then we can't expect |
| 613 | * any power sessions to remain intact. |
| 614 | */ |
| 615 | if (tried_handoff) |
| 616 | writel(0, op_reg_base + EHCI_CONFIGFLAG); |
| 617 | } |
| 618 | |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 619 | static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev) |
| 620 | { |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 621 | void __iomem *base, *op_reg_base; |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 622 | u32 hcc_params, cap, val; |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 623 | u8 offset, cap_length; |
Alan Stern | 97ff22e | 2011-10-27 11:20:21 -0400 | [diff] [blame] | 624 | int wait_time, count = 256/4; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 625 | |
Linus Torvalds | 541ab4a | 2005-10-31 21:12:40 -0800 | [diff] [blame] | 626 | if (!mmio_resource_enabled(pdev, 0)) |
| 627 | return; |
| 628 | |
Arjan van de Ven | 8e8ce4b | 2008-10-20 21:46:01 -0700 | [diff] [blame] | 629 | base = pci_ioremap_bar(pdev, 0); |
| 630 | if (base == NULL) |
| 631 | return; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 632 | |
| 633 | cap_length = readb(base); |
| 634 | op_reg_base = base + cap_length; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 635 | |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 636 | /* EHCI 0.96 and later may have "extended capabilities" |
| 637 | * spec section 5.1 explains the bios handoff, e.g. for |
| 638 | * booting from USB disk or using a usb keyboard |
| 639 | */ |
| 640 | hcc_params = readl(base + EHCI_HCC_PARAMS); |
| 641 | offset = (hcc_params >> 8) & 0xff; |
Roel Kluin | 6e14bda | 2009-01-31 12:37:04 +0100 | [diff] [blame] | 642 | while (offset && --count) { |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 643 | pci_read_config_dword(pdev, offset, &cap); |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 644 | |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 645 | switch (cap & 0xff) { |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 646 | case 1: |
| 647 | ehci_bios_handoff(pdev, op_reg_base, cap, offset); |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 648 | break; |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 649 | case 0: /* Illegal reserved cap, set cap=0 so we exit */ |
| 650 | cap = 0; /* then fallthrough... */ |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 651 | default: |
bjorn.helgaas@hp.com | f0fda80 | 2007-12-17 14:09:39 -0700 | [diff] [blame] | 652 | dev_warn(&pdev->dev, "EHCI: unrecognized capability " |
Andy Ross | 5c85301 | 2011-05-11 15:15:51 -0700 | [diff] [blame] | 653 | "%02x\n", cap & 0xff); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 654 | } |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 655 | offset = (cap >> 8) & 0xff; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 656 | } |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 657 | if (!count) |
bjorn.helgaas@hp.com | f0fda80 | 2007-12-17 14:09:39 -0700 | [diff] [blame] | 658 | dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n"); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 659 | |
| 660 | /* |
| 661 | * halt EHCI & disable its interrupts in any case |
| 662 | */ |
| 663 | val = readl(op_reg_base + EHCI_USBSTS); |
| 664 | if ((val & EHCI_USBSTS_HALTED) == 0) { |
| 665 | val = readl(op_reg_base + EHCI_USBCMD); |
| 666 | val &= ~EHCI_USBCMD_RUN; |
| 667 | writel(val, op_reg_base + EHCI_USBCMD); |
| 668 | |
| 669 | wait_time = 2000; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 670 | do { |
| 671 | writel(0x3f, op_reg_base + EHCI_USBSTS); |
Alan Stern | 97ff22e | 2011-10-27 11:20:21 -0400 | [diff] [blame] | 672 | udelay(100); |
| 673 | wait_time -= 100; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 674 | val = readl(op_reg_base + EHCI_USBSTS); |
| 675 | if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) { |
| 676 | break; |
| 677 | } |
| 678 | } while (wait_time > 0); |
| 679 | } |
| 680 | writel(0, op_reg_base + EHCI_USBINTR); |
| 681 | writel(0x3f, op_reg_base + EHCI_USBSTS); |
| 682 | |
| 683 | iounmap(base); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 684 | } |
| 685 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 686 | /* |
| 687 | * handshake - spin reading a register until handshake completes |
| 688 | * @ptr: address of hc register to be read |
| 689 | * @mask: bits to look at in result of read |
| 690 | * @done: value of those bits when handshake succeeds |
| 691 | * @wait_usec: timeout in microseconds |
| 692 | * @delay_usec: delay in microseconds to wait between polling |
| 693 | * |
| 694 | * Polls a register every delay_usec microseconds. |
| 695 | * Returns 0 when the mask bits have the value done. |
| 696 | * Returns -ETIMEDOUT if this condition is not true after |
| 697 | * wait_usec microseconds have passed. |
| 698 | */ |
| 699 | static int handshake(void __iomem *ptr, u32 mask, u32 done, |
| 700 | int wait_usec, int delay_usec) |
| 701 | { |
| 702 | u32 result; |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 703 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 704 | do { |
| 705 | result = readl(ptr); |
| 706 | result &= mask; |
| 707 | if (result == done) |
| 708 | return 0; |
| 709 | udelay(delay_usec); |
| 710 | wait_usec -= delay_usec; |
| 711 | } while (wait_usec > 0); |
| 712 | return -ETIMEDOUT; |
| 713 | } |
| 714 | |
Sarah Sharp | 69e848c | 2011-02-22 09:57:15 -0800 | [diff] [blame] | 715 | bool usb_is_intel_switchable_xhci(struct pci_dev *pdev) |
| 716 | { |
| 717 | return pdev->class == PCI_CLASS_SERIAL_USB_XHCI && |
| 718 | pdev->vendor == PCI_VENDOR_ID_INTEL && |
| 719 | pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI; |
| 720 | } |
| 721 | EXPORT_SYMBOL_GPL(usb_is_intel_switchable_xhci); |
| 722 | |
| 723 | /* |
| 724 | * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that |
| 725 | * share some number of ports. These ports can be switched between either |
| 726 | * controller. Not all of the ports under the EHCI host controller may be |
| 727 | * switchable. |
| 728 | * |
| 729 | * The ports should be switched over to xHCI before PCI probes for any device |
| 730 | * start. This avoids active devices under EHCI being disconnected during the |
| 731 | * port switchover, which could cause loss of data on USB storage devices, or |
| 732 | * failed boot when the root file system is on a USB mass storage device and is |
| 733 | * enumerated under EHCI first. |
| 734 | * |
| 735 | * We write into the xHC's PCI configuration space in some Intel-specific |
| 736 | * registers to switch the ports over. The USB 3.0 terminations and the USB |
| 737 | * 2.0 data wires are switched separately. We want to enable the SuperSpeed |
| 738 | * terminations before switching the USB 2.0 wires over, so that USB 3.0 |
| 739 | * devices connect at SuperSpeed, rather than at USB 2.0 speeds. |
| 740 | */ |
| 741 | void usb_enable_xhci_ports(struct pci_dev *xhci_pdev) |
| 742 | { |
| 743 | u32 ports_available; |
| 744 | |
| 745 | ports_available = 0xffffffff; |
| 746 | /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable |
| 747 | * Register, to turn on SuperSpeed terminations for all |
| 748 | * available ports. |
| 749 | */ |
| 750 | pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, |
| 751 | cpu_to_le32(ports_available)); |
| 752 | |
| 753 | pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, |
| 754 | &ports_available); |
| 755 | dev_dbg(&xhci_pdev->dev, "USB 3.0 ports that are now enabled " |
| 756 | "under xHCI: 0x%x\n", ports_available); |
| 757 | |
| 758 | ports_available = 0xffffffff; |
| 759 | /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to |
| 760 | * switch the USB 2.0 power and data lines over to the xHCI |
| 761 | * host. |
| 762 | */ |
| 763 | pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, |
| 764 | cpu_to_le32(ports_available)); |
| 765 | |
| 766 | pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, |
| 767 | &ports_available); |
| 768 | dev_dbg(&xhci_pdev->dev, "USB 2.0 ports that are now switched over " |
| 769 | "to xHCI: 0x%x\n", ports_available); |
| 770 | } |
| 771 | EXPORT_SYMBOL_GPL(usb_enable_xhci_ports); |
| 772 | |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 773 | /** |
| 774 | * PCI Quirks for xHCI. |
| 775 | * |
| 776 | * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS. |
| 777 | * It signals to the BIOS that the OS wants control of the host controller, |
| 778 | * and then waits 5 seconds for the BIOS to hand over control. |
| 779 | * If we timeout, assume the BIOS is broken and take control anyway. |
| 780 | */ |
| 781 | static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev) |
| 782 | { |
| 783 | void __iomem *base; |
| 784 | int ext_cap_offset; |
| 785 | void __iomem *op_reg_base; |
| 786 | u32 val; |
| 787 | int timeout; |
| 788 | |
| 789 | if (!mmio_resource_enabled(pdev, 0)) |
| 790 | return; |
| 791 | |
| 792 | base = ioremap_nocache(pci_resource_start(pdev, 0), |
| 793 | pci_resource_len(pdev, 0)); |
| 794 | if (base == NULL) |
| 795 | return; |
| 796 | |
| 797 | /* |
| 798 | * Find the Legacy Support Capability register - |
| 799 | * this is optional for xHCI host controllers. |
| 800 | */ |
| 801 | ext_cap_offset = xhci_find_next_cap_offset(base, XHCI_HCC_PARAMS_OFFSET); |
| 802 | do { |
| 803 | if (!ext_cap_offset) |
| 804 | /* We've reached the end of the extended capabilities */ |
| 805 | goto hc_init; |
| 806 | val = readl(base + ext_cap_offset); |
| 807 | if (XHCI_EXT_CAPS_ID(val) == XHCI_EXT_CAPS_LEGACY) |
| 808 | break; |
| 809 | ext_cap_offset = xhci_find_next_cap_offset(base, ext_cap_offset); |
| 810 | } while (1); |
| 811 | |
| 812 | /* If the BIOS owns the HC, signal that the OS wants it, and wait */ |
| 813 | if (val & XHCI_HC_BIOS_OWNED) { |
JiSheng Zhang | 6768458 | 2011-07-16 11:04:19 +0800 | [diff] [blame] | 814 | writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 815 | |
| 816 | /* Wait for 5 seconds with 10 microsecond polling interval */ |
| 817 | timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED, |
| 818 | 0, 5000, 10); |
| 819 | |
| 820 | /* Assume a buggy BIOS and take HC ownership anyway */ |
| 821 | if (timeout) { |
| 822 | dev_warn(&pdev->dev, "xHCI BIOS handoff failed" |
| 823 | " (BIOS bug ?) %08x\n", val); |
| 824 | writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | /* Disable any BIOS SMIs */ |
| 829 | writel(XHCI_LEGACY_DISABLE_SMI, |
| 830 | base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); |
| 831 | |
Sarah Sharp | 69e848c | 2011-02-22 09:57:15 -0800 | [diff] [blame] | 832 | if (usb_is_intel_switchable_xhci(pdev)) |
| 833 | usb_enable_xhci_ports(pdev); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 834 | hc_init: |
| 835 | op_reg_base = base + XHCI_HC_LENGTH(readl(base)); |
| 836 | |
| 837 | /* Wait for the host controller to be ready before writing any |
| 838 | * operational or runtime registers. Wait 5 seconds and no more. |
| 839 | */ |
| 840 | timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0, |
| 841 | 5000, 10); |
| 842 | /* Assume a buggy HC and start HC initialization anyway */ |
| 843 | if (timeout) { |
| 844 | val = readl(op_reg_base + XHCI_STS_OFFSET); |
| 845 | dev_warn(&pdev->dev, |
| 846 | "xHCI HW not ready after 5 sec (HC bug?) " |
| 847 | "status = 0x%x\n", val); |
| 848 | } |
| 849 | |
| 850 | /* Send the halt and disable interrupts command */ |
| 851 | val = readl(op_reg_base + XHCI_CMD_OFFSET); |
| 852 | val &= ~(XHCI_CMD_RUN | XHCI_IRQS); |
| 853 | writel(val, op_reg_base + XHCI_CMD_OFFSET); |
| 854 | |
| 855 | /* Wait for the HC to halt - poll every 125 usec (one microframe). */ |
| 856 | timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1, |
| 857 | XHCI_MAX_HALT_USEC, 125); |
| 858 | if (timeout) { |
| 859 | val = readl(op_reg_base + XHCI_STS_OFFSET); |
| 860 | dev_warn(&pdev->dev, |
| 861 | "xHCI HW did not halt within %d usec " |
| 862 | "status = 0x%x\n", XHCI_MAX_HALT_USEC, val); |
| 863 | } |
| 864 | |
| 865 | iounmap(base); |
| 866 | } |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 867 | |
| 868 | static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev) |
| 869 | { |
Alan Stern | 478a3ba | 2005-10-19 12:52:02 -0400 | [diff] [blame] | 870 | if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI) |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 871 | quirk_usb_handoff_uhci(pdev); |
Alan Stern | 478a3ba | 2005-10-19 12:52:02 -0400 | [diff] [blame] | 872 | else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI) |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 873 | quirk_usb_handoff_ohci(pdev); |
Alan Stern | 478a3ba | 2005-10-19 12:52:02 -0400 | [diff] [blame] | 874 | else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI) |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 875 | quirk_usb_disable_ehci(pdev); |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 876 | else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI) |
| 877 | quirk_usb_handoff_xhci(pdev); |
David Brownell | 7586269 | 2005-09-23 17:14:37 -0700 | [diff] [blame] | 878 | } |
Linus Torvalds | d93a8f8 | 2009-10-11 15:57:57 -0700 | [diff] [blame] | 879 | DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff); |