Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 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 | #ifndef CONFIG_PCI |
| 22 | #error "This file is PCI bus glue. CONFIG_PCI must be defined." |
| 23 | #endif |
| 24 | |
Dirk Brandewie | 4f68384 | 2010-11-17 07:43:09 -0800 | [diff] [blame] | 25 | /* defined here to avoid adding to pci_ids.h for single instance use */ |
| 26 | #define PCI_DEVICE_ID_INTEL_CE4100_USB 0x2e70 |
| 27 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 28 | /*-------------------------------------------------------------------------*/ |
| 29 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 30 | /* called after powerup, by probe or system-pm "wakeup" */ |
| 31 | static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev) |
| 32 | { |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 33 | int retval; |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 34 | |
David Brownell | 401feaf | 2006-01-24 07:15:30 -0800 | [diff] [blame] | 35 | /* we expect static quirk code to handle the "extended capabilities" |
| 36 | * (currently just BIOS handoff) allowed starting with EHCI 0.96 |
| 37 | */ |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 38 | |
| 39 | /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */ |
| 40 | retval = pci_set_mwi(pdev); |
| 41 | if (!retval) |
| 42 | ehci_dbg(ehci, "MWI active\n"); |
| 43 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 44 | return 0; |
| 45 | } |
| 46 | |
David Brownell | 8926bfa | 2005-11-28 08:40:38 -0800 | [diff] [blame] | 47 | /* called during probe() after chip reset completes */ |
| 48 | static int ehci_pci_setup(struct usb_hcd *hcd) |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 49 | { |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 50 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 51 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
Andiry Xu | b09bc6c | 2008-11-14 11:42:29 +0800 | [diff] [blame] | 52 | struct pci_dev *p_smbus; |
| 53 | u8 rev; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 54 | u32 temp; |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 55 | int retval; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 56 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 57 | switch (pdev->vendor) { |
| 58 | case PCI_VENDOR_ID_TOSHIBA_2: |
| 59 | /* celleb's companion chip */ |
| 60 | if (pdev->device == 0x01b5) { |
| 61 | #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO |
| 62 | ehci->big_endian_mmio = 1; |
| 63 | #else |
| 64 | ehci_warn(ehci, |
| 65 | "unsupported big endian Toshiba quirk\n"); |
| 66 | #endif |
| 67 | } |
| 68 | break; |
| 69 | } |
| 70 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 71 | ehci->caps = hcd->regs; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 72 | ehci->regs = hcd->regs + |
Jan Andersson | c430131 | 2011-05-03 20:11:57 +0200 | [diff] [blame] | 73 | HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 74 | |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 75 | dbg_hcs_params(ehci, "reset"); |
| 76 | dbg_hcc_params(ehci, "reset"); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 77 | |
Paul Serice | c32ba30 | 2006-06-07 10:23:38 -0700 | [diff] [blame] | 78 | /* ehci_init() causes memory for DMA transfers to be |
| 79 | * allocated. Thus, any vendor-specific workarounds based on |
| 80 | * limiting the type of memory used for DMA transfers must |
| 81 | * happen before ehci_init() is called. */ |
| 82 | switch (pdev->vendor) { |
| 83 | case PCI_VENDOR_ID_NVIDIA: |
| 84 | /* NVidia reports that certain chips don't handle |
| 85 | * QH, ITD, or SITD addresses above 2GB. (But TD, |
| 86 | * data buffer, and periodic schedule are normal.) |
| 87 | */ |
| 88 | switch (pdev->device) { |
| 89 | case 0x003c: /* MCP04 */ |
| 90 | case 0x005b: /* CK804 */ |
| 91 | case 0x00d8: /* CK8 */ |
| 92 | case 0x00e8: /* CK8S */ |
| 93 | if (pci_set_consistent_dma_mask(pdev, |
Yang Hongyang | 929a22a | 2009-04-06 19:01:16 -0700 | [diff] [blame] | 94 | DMA_BIT_MASK(31)) < 0) |
Paul Serice | c32ba30 | 2006-06-07 10:23:38 -0700 | [diff] [blame] | 95 | ehci_warn(ehci, "can't enable NVidia " |
| 96 | "workaround for >2GB RAM\n"); |
| 97 | break; |
| 98 | } |
| 99 | break; |
| 100 | } |
| 101 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 102 | /* cache this readonly data; minimize chip reads */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 103 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 104 | |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 105 | retval = ehci_halt(ehci); |
| 106 | if (retval) |
| 107 | return retval; |
| 108 | |
Andiry Xu | 3d091a6 | 2010-11-08 17:58:35 +0800 | [diff] [blame] | 109 | if ((pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x7808) || |
| 110 | (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x4396)) { |
| 111 | /* EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may |
| 112 | * read/write memory space which does not belong to it when |
| 113 | * there is NULL pointer with T-bit set to 1 in the frame list |
| 114 | * table. To avoid the issue, the frame list link pointer |
| 115 | * should always contain a valid pointer to a inactive qh. |
| 116 | */ |
| 117 | ehci->use_dummy_qh = 1; |
| 118 | ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI " |
| 119 | "dummy qh workaround\n"); |
| 120 | } |
| 121 | |
David Brownell | 8926bfa | 2005-11-28 08:40:38 -0800 | [diff] [blame] | 122 | /* data structure init */ |
| 123 | retval = ehci_init(hcd); |
| 124 | if (retval) |
| 125 | return retval; |
| 126 | |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 127 | switch (pdev->vendor) { |
David Miller | 3681d8f | 2010-04-06 18:26:03 -0700 | [diff] [blame] | 128 | case PCI_VENDOR_ID_NEC: |
| 129 | ehci->need_io_watchdog = 0; |
| 130 | break; |
Alek Du | 403dbd3 | 2009-07-13 17:30:41 +0800 | [diff] [blame] | 131 | case PCI_VENDOR_ID_INTEL: |
| 132 | ehci->need_io_watchdog = 0; |
Alan Stern | ae68a83 | 2010-07-14 11:03:23 -0400 | [diff] [blame] | 133 | ehci->fs_i_thresh = 1; |
Oliver Neukum | ee4ecb8 | 2009-11-27 15:17:59 +0100 | [diff] [blame] | 134 | if (pdev->device == 0x27cc) { |
| 135 | ehci->broken_periodic = 1; |
| 136 | ehci_info(ehci, "using broken periodic workaround\n"); |
| 137 | } |
Alek Du | fc92825 | 2010-09-06 14:50:57 +0100 | [diff] [blame] | 138 | if (pdev->device == 0x0806 || pdev->device == 0x0811 |
| 139 | || pdev->device == 0x0829) { |
| 140 | ehci_info(ehci, "disable lpm for langwell/penwell\n"); |
| 141 | ehci->has_lpm = 0; |
| 142 | } |
Dirk Brandewie | 4f68384 | 2010-11-17 07:43:09 -0800 | [diff] [blame] | 143 | if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB) { |
| 144 | hcd->has_tt = 1; |
| 145 | tdi_reset(ehci); |
| 146 | } |
Alek Du | 403dbd3 | 2009-07-13 17:30:41 +0800 | [diff] [blame] | 147 | break; |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 148 | case PCI_VENDOR_ID_TDI: |
| 149 | if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) { |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 150 | hcd->has_tt = 1; |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 151 | tdi_reset(ehci); |
| 152 | } |
| 153 | break; |
| 154 | case PCI_VENDOR_ID_AMD: |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 155 | /* AMD PLL quirk */ |
| 156 | if (usb_amd_find_chipset_info()) |
| 157 | ehci->amd_pll_fix = 1; |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 158 | /* AMD8111 EHCI doesn't work, according to AMD errata */ |
| 159 | if (pdev->device == 0x7463) { |
| 160 | ehci_info(ehci, "ignoring AMD8111 (errata)\n"); |
David Brownell | 8926bfa | 2005-11-28 08:40:38 -0800 | [diff] [blame] | 161 | retval = -EIO; |
| 162 | goto done; |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 163 | } |
| 164 | break; |
| 165 | case PCI_VENDOR_ID_NVIDIA: |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 166 | switch (pdev->device) { |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 167 | /* Some NForce2 chips have problems with selective suspend; |
| 168 | * fixed in newer silicon. |
| 169 | */ |
| 170 | case 0x0068: |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 171 | if (pdev->revision < 0xa4) |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 172 | ehci->no_selective_suspend = 1; |
| 173 | break; |
Brian J. Tarricone | a85b4e7 | 2010-11-21 21:15:52 -0800 | [diff] [blame] | 174 | |
| 175 | /* MCP89 chips on the MacBookAir3,1 give EPROTO when |
| 176 | * fetching device descriptors unless LPM is disabled. |
| 177 | * There are also intermittent problems enumerating |
| 178 | * devices with PPCD enabled. |
| 179 | */ |
| 180 | case 0x0d9d: |
| 181 | ehci_info(ehci, "disable lpm/ppcd for nvidia mcp89"); |
| 182 | ehci->has_lpm = 0; |
| 183 | ehci->has_ppcd = 0; |
| 184 | ehci->command &= ~CMD_PPCEE; |
| 185 | break; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 186 | } |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 187 | break; |
Rene Herman | 055b93c | 2008-03-20 00:58:16 -0700 | [diff] [blame] | 188 | case PCI_VENDOR_ID_VIA: |
| 189 | if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) { |
| 190 | u8 tmp; |
| 191 | |
| 192 | /* The VT6212 defaults to a 1 usec EHCI sleep time which |
| 193 | * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes |
| 194 | * that sleep time use the conventional 10 usec. |
| 195 | */ |
| 196 | pci_read_config_byte(pdev, 0x4b, &tmp); |
| 197 | if (tmp & 0x20) |
| 198 | break; |
| 199 | pci_write_config_byte(pdev, 0x4b, tmp | 0x20); |
| 200 | } |
| 201 | break; |
Andiry Xu | b09bc6c | 2008-11-14 11:42:29 +0800 | [diff] [blame] | 202 | case PCI_VENDOR_ID_ATI: |
Andiry Xu | ad93562 | 2011-03-01 14:57:05 +0800 | [diff] [blame] | 203 | /* AMD PLL quirk */ |
| 204 | if (usb_amd_find_chipset_info()) |
| 205 | ehci->amd_pll_fix = 1; |
Shane Huang | 0a99e8a | 2008-11-25 15:12:33 +0800 | [diff] [blame] | 206 | /* SB600 and old version of SB700 have a bug in EHCI controller, |
Andiry Xu | b09bc6c | 2008-11-14 11:42:29 +0800 | [diff] [blame] | 207 | * which causes usb devices lose response in some cases. |
| 208 | */ |
Shane Huang | 0a99e8a | 2008-11-25 15:12:33 +0800 | [diff] [blame] | 209 | if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) { |
Andiry Xu | b09bc6c | 2008-11-14 11:42:29 +0800 | [diff] [blame] | 210 | p_smbus = pci_get_device(PCI_VENDOR_ID_ATI, |
| 211 | PCI_DEVICE_ID_ATI_SBX00_SMBUS, |
| 212 | NULL); |
| 213 | if (!p_smbus) |
| 214 | break; |
| 215 | rev = p_smbus->revision; |
Shane Huang | 0a99e8a | 2008-11-25 15:12:33 +0800 | [diff] [blame] | 216 | if ((pdev->device == 0x4386) || (rev == 0x3a) |
| 217 | || (rev == 0x3b)) { |
Andiry Xu | b09bc6c | 2008-11-14 11:42:29 +0800 | [diff] [blame] | 218 | u8 tmp; |
Shane Huang | 0a99e8a | 2008-11-25 15:12:33 +0800 | [diff] [blame] | 219 | ehci_info(ehci, "applying AMD SB600/SB700 USB " |
| 220 | "freeze workaround\n"); |
Andiry Xu | b09bc6c | 2008-11-14 11:42:29 +0800 | [diff] [blame] | 221 | pci_read_config_byte(pdev, 0x53, &tmp); |
| 222 | pci_write_config_byte(pdev, 0x53, tmp | (1<<3)); |
| 223 | } |
| 224 | pci_dev_put(p_smbus); |
| 225 | } |
| 226 | break; |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 227 | } |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 228 | |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 229 | /* optional debug port, normally in the first BAR */ |
| 230 | temp = pci_find_capability(pdev, 0x0a); |
| 231 | if (temp) { |
| 232 | pci_read_config_dword(pdev, temp, &temp); |
| 233 | temp >>= 16; |
| 234 | if ((temp & (3 << 13)) == (1 << 13)) { |
| 235 | temp &= 0x1fff; |
| 236 | ehci->debug = ehci_to_hcd(ehci)->regs + temp; |
| 237 | temp = ehci_readl(ehci, &ehci->debug->control); |
| 238 | ehci_info(ehci, "debug port %d%s\n", |
| 239 | HCS_DEBUG_PORT(ehci->hcs_params), |
| 240 | (temp & DBGP_ENABLED) |
| 241 | ? " IN USE" |
| 242 | : ""); |
| 243 | if (!(temp & DBGP_ENABLED)) |
| 244 | ehci->debug = NULL; |
| 245 | } |
| 246 | } |
| 247 | |
Marcelo Tosatti | af1c51f | 2007-08-20 18:13:27 -0700 | [diff] [blame] | 248 | ehci_reset(ehci); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 249 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 250 | /* at least the Genesys GL880S needs fixup here */ |
| 251 | temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params); |
| 252 | temp &= 0x0f; |
| 253 | if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) { |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 254 | ehci_dbg(ehci, "bogus port configuration: " |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 255 | "cc=%d x pcc=%d < ports=%d\n", |
| 256 | HCS_N_CC(ehci->hcs_params), |
| 257 | HCS_N_PCC(ehci->hcs_params), |
| 258 | HCS_N_PORTS(ehci->hcs_params)); |
| 259 | |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 260 | switch (pdev->vendor) { |
| 261 | case 0x17a0: /* GENESYS */ |
| 262 | /* GL880S: should be PORTS=2 */ |
| 263 | temp |= (ehci->hcs_params & ~0xf); |
| 264 | ehci->hcs_params = temp; |
| 265 | break; |
| 266 | case PCI_VENDOR_ID_NVIDIA: |
| 267 | /* NF4: should be PCC=10 */ |
| 268 | break; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 269 | } |
| 270 | } |
| 271 | |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 272 | /* Serial Bus Release Number is at PCI 0x60 offset */ |
| 273 | pci_read_config_byte(pdev, 0x60, &ehci->sbrn); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 274 | |
Alan Stern | 6fd9086 | 2008-12-17 17:20:38 -0500 | [diff] [blame] | 275 | /* Keep this around for a while just in case some EHCI |
| 276 | * implementation uses legacy PCI PM support. This test |
| 277 | * can be removed on 17 Dec 2009 if the dev_warn() hasn't |
| 278 | * been triggered by then. |
David Brownell | 2c1c3c4 | 2005-11-07 15:24:46 -0800 | [diff] [blame] | 279 | */ |
| 280 | if (!device_can_wakeup(&pdev->dev)) { |
| 281 | u16 port_wake; |
| 282 | |
| 283 | pci_read_config_word(pdev, 0x62, &port_wake); |
Alan Stern | 6fd9086 | 2008-12-17 17:20:38 -0500 | [diff] [blame] | 284 | if (port_wake & 0x0001) { |
| 285 | dev_warn(&pdev->dev, "Enabling legacy PCI PM\n"); |
Alan Stern | bcca06e | 2009-01-13 11:35:54 -0500 | [diff] [blame] | 286 | device_set_wakeup_capable(&pdev->dev, 1); |
Alan Stern | 6fd9086 | 2008-12-17 17:20:38 -0500 | [diff] [blame] | 287 | } |
David Brownell | 2c1c3c4 | 2005-11-07 15:24:46 -0800 | [diff] [blame] | 288 | } |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 289 | |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 290 | #ifdef CONFIG_USB_SUSPEND |
| 291 | /* REVISIT: the controller works fine for wakeup iff the root hub |
| 292 | * itself is "globally" suspended, but usbcore currently doesn't |
| 293 | * understand such things. |
| 294 | * |
| 295 | * System suspend currently expects to be able to suspend the entire |
| 296 | * device tree, device-at-a-time. If we failed selective suspend |
| 297 | * reports, system suspend would fail; so the root hub code must claim |
Anand Gadiyar | 411c940 | 2009-07-07 15:24:23 +0530 | [diff] [blame] | 298 | * success. That's lying to usbcore, and it matters for runtime |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 299 | * PM scenarios with selective suspend and remote wakeup... |
| 300 | */ |
| 301 | if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev)) |
| 302 | ehci_warn(ehci, "selective suspend/wakeup unavailable\n"); |
| 303 | #endif |
| 304 | |
Alan Stern | aff6d18 | 2008-04-18 11:11:26 -0400 | [diff] [blame] | 305 | ehci_port_power(ehci, 1); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 306 | retval = ehci_pci_reinit(ehci, pdev); |
David Brownell | 8926bfa | 2005-11-28 08:40:38 -0800 | [diff] [blame] | 307 | done: |
| 308 | return retval; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | /*-------------------------------------------------------------------------*/ |
| 312 | |
| 313 | #ifdef CONFIG_PM |
| 314 | |
| 315 | /* suspend/resume, section 4.3 */ |
| 316 | |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 317 | /* These routines rely on the PCI bus glue |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 318 | * to handle powerdown and wakeup, and currently also on |
| 319 | * transceivers that don't need any software attention to set up |
| 320 | * the right sort of wakeup. |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 321 | * Also they depend on separate root hub suspend/resume. |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 322 | */ |
| 323 | |
Alan Stern | 4147200 | 2010-06-25 14:02:14 -0400 | [diff] [blame] | 324 | static int ehci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup) |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 325 | { |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 326 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 327 | unsigned long flags; |
| 328 | int rc = 0; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 329 | |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 330 | if (time_before(jiffies, ehci->next_statechange)) |
| 331 | msleep(10); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 332 | |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 333 | /* Root hub was already suspended. Disable irq emission and |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 334 | * mark HW unaccessible. The PM and USB cores make sure that |
| 335 | * the root hub is either suspended or stopped. |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 336 | */ |
Alan Stern | 4147200 | 2010-06-25 14:02:14 -0400 | [diff] [blame] | 337 | ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup); |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 338 | spin_lock_irqsave (&ehci->lock, flags); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 339 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
| 340 | (void)ehci_readl(ehci, &ehci->regs->intr_enable); |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 341 | |
| 342 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 343 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 344 | |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 345 | // could save FLADJ in case of Vaux power loss |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 346 | // ... we'd only use it to handle clock skew |
| 347 | |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 348 | return rc; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Sarah Sharp | 69e848c | 2011-02-22 09:57:15 -0800 | [diff] [blame] | 351 | static bool usb_is_intel_switchable_ehci(struct pci_dev *pdev) |
| 352 | { |
| 353 | return pdev->class == PCI_CLASS_SERIAL_USB_EHCI && |
| 354 | pdev->vendor == PCI_VENDOR_ID_INTEL && |
| 355 | pdev->device == 0x1E26; |
| 356 | } |
| 357 | |
| 358 | static void ehci_enable_xhci_companion(void) |
| 359 | { |
| 360 | struct pci_dev *companion = NULL; |
| 361 | |
| 362 | /* The xHCI and EHCI controllers are not on the same PCI slot */ |
| 363 | for_each_pci_dev(companion) { |
| 364 | if (!usb_is_intel_switchable_xhci(companion)) |
| 365 | continue; |
| 366 | usb_enable_xhci_ports(companion); |
| 367 | return; |
| 368 | } |
| 369 | } |
| 370 | |
Alan Stern | 6ec4beb | 2009-04-27 13:33:41 -0400 | [diff] [blame] | 371 | static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated) |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 372 | { |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 373 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 374 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 375 | |
Sarah Sharp | 69e848c | 2011-02-22 09:57:15 -0800 | [diff] [blame] | 376 | /* The BIOS on systems with the Intel Panther Point chipset may or may |
| 377 | * not support xHCI natively. That means that during system resume, it |
| 378 | * may switch the ports back to EHCI so that users can use their |
| 379 | * keyboard to select a kernel from GRUB after resume from hibernate. |
| 380 | * |
| 381 | * The BIOS is supposed to remember whether the OS had xHCI ports |
| 382 | * enabled before resume, and switch the ports back to xHCI when the |
| 383 | * BIOS/OS semaphore is written, but we all know we can't trust BIOS |
| 384 | * writers. |
| 385 | * |
| 386 | * Unconditionally switch the ports back to xHCI after a system resume. |
| 387 | * We can't tell whether the EHCI or xHCI controller will be resumed |
| 388 | * first, so we have to do the port switchover in both drivers. Writing |
| 389 | * a '1' to the port switchover registers should have no effect if the |
| 390 | * port was already switched over. |
| 391 | */ |
| 392 | if (usb_is_intel_switchable_ehci(pdev)) |
| 393 | ehci_enable_xhci_companion(); |
| 394 | |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 395 | // maybe restore FLADJ |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 396 | |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 397 | if (time_before(jiffies, ehci->next_statechange)) |
| 398 | msleep(100); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 399 | |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 400 | /* Mark hardware accessible again as we are out of D3 state by now */ |
| 401 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 402 | |
Alan Stern | 6ec4beb | 2009-04-27 13:33:41 -0400 | [diff] [blame] | 403 | /* If CF is still set and we aren't resuming from hibernation |
| 404 | * then we maintained PCI Vaux power. |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 405 | * Just undo the effect of ehci_pci_suspend(). |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 406 | */ |
Alan Stern | 6ec4beb | 2009-04-27 13:33:41 -0400 | [diff] [blame] | 407 | if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF && |
| 408 | !hibernated) { |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 409 | int mask = INTR_MASK; |
| 410 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 411 | ehci_prepare_ports_for_controller_resume(ehci); |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 412 | if (!hcd->self.root_hub->do_remote_wakeup) |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 413 | mask &= ~STS_PCD; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 414 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
| 415 | ehci_readl(ehci, &ehci->regs->intr_enable); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 416 | return 0; |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 417 | } |
| 418 | |
Alan Stern | 1c50c31 | 2005-11-14 11:45:38 -0500 | [diff] [blame] | 419 | usb_root_hub_lost_power(hcd->self.root_hub); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 420 | |
| 421 | /* Else reset, to cope with power loss or flush-to-storage |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 422 | * style "resume" having let BIOS kick in during reboot. |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 423 | */ |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 424 | (void) ehci_halt(ehci); |
| 425 | (void) ehci_reset(ehci); |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 426 | (void) ehci_pci_reinit(ehci, pdev); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 427 | |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 428 | /* emptying the schedule aborts any urbs */ |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 429 | spin_lock_irq(&ehci->lock); |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 430 | if (ehci->reclaim) |
Alan Stern | 07d29b6 | 2007-12-11 16:05:30 -0500 | [diff] [blame] | 431 | end_unlink_async(ehci); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 432 | ehci_work(ehci); |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 433 | spin_unlock_irq(&ehci->lock); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 434 | |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 435 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
| 436 | ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); |
| 437 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 438 | |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 439 | /* here we "know" root ports should always stay powered */ |
| 440 | ehci_port_power(ehci, 1); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 441 | |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 442 | ehci->rh_state = EHCI_RH_SUSPENDED; |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 443 | return 0; |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 444 | } |
| 445 | #endif |
| 446 | |
Alek Du | 48f2497 | 2010-06-04 15:47:55 +0800 | [diff] [blame] | 447 | static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
| 448 | { |
| 449 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 450 | int rc = 0; |
| 451 | |
| 452 | if (!udev->parent) /* udev is root hub itself, impossible */ |
| 453 | rc = -1; |
| 454 | /* we only support lpm device connected to root hub yet */ |
| 455 | if (ehci->has_lpm && !udev->parent->parent) { |
| 456 | rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum); |
| 457 | if (!rc) |
| 458 | rc = ehci_lpm_check(ehci, udev->portnum); |
| 459 | } |
| 460 | return rc; |
| 461 | } |
| 462 | |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 463 | static const struct hc_driver ehci_pci_hc_driver = { |
| 464 | .description = hcd_name, |
| 465 | .product_desc = "EHCI Host Controller", |
| 466 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 467 | |
| 468 | /* |
| 469 | * generic hardware linkage |
| 470 | */ |
| 471 | .irq = ehci_irq, |
| 472 | .flags = HCD_MEMORY | HCD_USB2, |
| 473 | |
| 474 | /* |
| 475 | * basic lifecycle operations |
| 476 | */ |
David Brownell | 8926bfa | 2005-11-28 08:40:38 -0800 | [diff] [blame] | 477 | .reset = ehci_pci_setup, |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 478 | .start = ehci_run, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 479 | #ifdef CONFIG_PM |
Alan Stern | 7be7d74 | 2008-04-03 18:03:06 -0400 | [diff] [blame] | 480 | .pci_suspend = ehci_pci_suspend, |
| 481 | .pci_resume = ehci_pci_resume, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 482 | #endif |
David Brownell | 1880752 | 2005-11-23 15:45:37 -0800 | [diff] [blame] | 483 | .stop = ehci_stop, |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 484 | .shutdown = ehci_shutdown, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 485 | |
| 486 | /* |
| 487 | * managing i/o requests and associated device resources |
| 488 | */ |
| 489 | .urb_enqueue = ehci_urb_enqueue, |
| 490 | .urb_dequeue = ehci_urb_dequeue, |
| 491 | .endpoint_disable = ehci_endpoint_disable, |
Alan Stern | b18ffd4 | 2009-05-27 18:21:56 -0400 | [diff] [blame] | 492 | .endpoint_reset = ehci_endpoint_reset, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 493 | |
| 494 | /* |
| 495 | * scheduling support |
| 496 | */ |
| 497 | .get_frame_number = ehci_get_frame, |
| 498 | |
| 499 | /* |
| 500 | * root hub support |
| 501 | */ |
| 502 | .hub_status_data = ehci_hub_status_data, |
| 503 | .hub_control = ehci_hub_control, |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 504 | .bus_suspend = ehci_bus_suspend, |
| 505 | .bus_resume = ehci_bus_resume, |
Alan Stern | a8e5177 | 2008-05-20 16:58:11 -0400 | [diff] [blame] | 506 | .relinquish_port = ehci_relinquish_port, |
Alan Stern | 3a31155 | 2008-05-20 16:58:29 -0400 | [diff] [blame] | 507 | .port_handed_over = ehci_port_handed_over, |
Alan Stern | 914b701 | 2009-06-29 10:47:30 -0400 | [diff] [blame] | 508 | |
Alek Du | 48f2497 | 2010-06-04 15:47:55 +0800 | [diff] [blame] | 509 | /* |
| 510 | * call back when device connected and addressed |
| 511 | */ |
| 512 | .update_device = ehci_update_device, |
| 513 | |
Alan Stern | 914b701 | 2009-06-29 10:47:30 -0400 | [diff] [blame] | 514 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 515 | }; |
| 516 | |
| 517 | /*-------------------------------------------------------------------------*/ |
| 518 | |
| 519 | /* PCI driver selection metadata; PCI hotplugging uses this */ |
| 520 | static const struct pci_device_id pci_ids [] = { { |
| 521 | /* handle any USB 2.0 EHCI controller */ |
Jean Delvare | c67808e | 2006-04-09 20:07:35 +0200 | [diff] [blame] | 522 | PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0), |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 523 | .driver_data = (unsigned long) &ehci_pci_hc_driver, |
| 524 | }, |
| 525 | { /* end: all zeroes */ } |
| 526 | }; |
David Brownell | abcc94480 | 2005-11-23 15:45:32 -0800 | [diff] [blame] | 527 | MODULE_DEVICE_TABLE(pci, pci_ids); |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 528 | |
| 529 | /* pci driver glue; this is a "new style" PCI driver module */ |
| 530 | static struct pci_driver ehci_pci_driver = { |
| 531 | .name = (char *) hcd_name, |
| 532 | .id_table = pci_ids, |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 533 | |
| 534 | .probe = usb_hcd_pci_probe, |
| 535 | .remove = usb_hcd_pci_remove, |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 536 | .shutdown = usb_hcd_pci_shutdown, |
Alan Stern | abb3064 | 2009-04-27 13:33:24 -0400 | [diff] [blame] | 537 | |
| 538 | #ifdef CONFIG_PM_SLEEP |
| 539 | .driver = { |
| 540 | .pm = &usb_hcd_pci_pm_ops |
| 541 | }, |
| 542 | #endif |
Matt Porter | 7ff71d6 | 2005-09-22 22:31:15 -0700 | [diff] [blame] | 543 | }; |