Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
David Brownell | d49d431 | 2005-05-07 13:21:50 -0700 | [diff] [blame] | 2 | * Copyright (C) 2001-2004 by David Brownell |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the |
| 6 | * Free Software Foundation; either version 2 of the License, or (at your |
| 7 | * option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software Foundation, |
| 16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
| 19 | /* this file is part of ehci-hcd.c */ |
| 20 | |
| 21 | /*-------------------------------------------------------------------------*/ |
| 22 | |
| 23 | /* |
| 24 | * EHCI Root Hub ... the nonsharable stuff |
| 25 | * |
| 26 | * Registers don't need cpu_to_le32, that happens transparently |
| 27 | */ |
| 28 | |
| 29 | /*-------------------------------------------------------------------------*/ |
Anatolij Gustschin | 83722bc | 2011-04-18 22:02:00 +0200 | [diff] [blame] | 30 | #include <linux/usb/otg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 32 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
| 33 | |
Alan Stern | aff6d18 | 2008-04-18 11:11:26 -0400 | [diff] [blame] | 34 | #ifdef CONFIG_PM |
| 35 | |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 36 | static int ehci_hub_control( |
| 37 | struct usb_hcd *hcd, |
| 38 | u16 typeReq, |
| 39 | u16 wValue, |
| 40 | u16 wIndex, |
| 41 | char *buf, |
| 42 | u16 wLength |
| 43 | ); |
| 44 | |
| 45 | /* After a power loss, ports that were owned by the companion must be |
| 46 | * reset so that the companion can still own them. |
| 47 | */ |
| 48 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) |
| 49 | { |
| 50 | u32 __iomem *reg; |
| 51 | u32 status; |
| 52 | int port; |
| 53 | __le32 buf; |
| 54 | struct usb_hcd *hcd = ehci_to_hcd(ehci); |
| 55 | |
| 56 | if (!ehci->owned_ports) |
| 57 | return; |
| 58 | |
Alan Stern | c73cee7 | 2012-10-31 13:21:06 -0400 | [diff] [blame] | 59 | /* Make sure the ports are powered */ |
| 60 | port = HCS_N_PORTS(ehci->hcs_params); |
| 61 | while (port--) { |
| 62 | if (test_bit(port, &ehci->owned_ports)) { |
| 63 | reg = &ehci->regs->port_status[port]; |
| 64 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
| 65 | if (!(status & PORT_POWER)) { |
| 66 | status |= PORT_POWER; |
| 67 | ehci_writel(ehci, status, reg); |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 72 | /* Give the connections some time to appear */ |
| 73 | msleep(20); |
| 74 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 75 | spin_lock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 76 | port = HCS_N_PORTS(ehci->hcs_params); |
| 77 | while (port--) { |
| 78 | if (test_bit(port, &ehci->owned_ports)) { |
| 79 | reg = &ehci->regs->port_status[port]; |
Alan Stern | 3c519b8 | 2007-05-04 11:55:31 -0400 | [diff] [blame] | 80 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 81 | |
| 82 | /* Port already owned by companion? */ |
| 83 | if (status & PORT_OWNER) |
| 84 | clear_bit(port, &ehci->owned_ports); |
Alan Stern | 3c519b8 | 2007-05-04 11:55:31 -0400 | [diff] [blame] | 85 | else if (test_bit(port, &ehci->companion_ports)) |
| 86 | ehci_writel(ehci, status & ~PORT_PE, reg); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 87 | else { |
| 88 | spin_unlock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 89 | ehci_hub_control(hcd, SetPortFeature, |
| 90 | USB_PORT_FEAT_RESET, port + 1, |
| 91 | NULL, 0); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 92 | spin_lock_irq(&ehci->lock); |
| 93 | } |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 94 | } |
| 95 | } |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 96 | spin_unlock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 97 | |
| 98 | if (!ehci->owned_ports) |
| 99 | return; |
| 100 | msleep(90); /* Wait for resets to complete */ |
| 101 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 102 | spin_lock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 103 | port = HCS_N_PORTS(ehci->hcs_params); |
| 104 | while (port--) { |
| 105 | if (test_bit(port, &ehci->owned_ports)) { |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 106 | spin_unlock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 107 | ehci_hub_control(hcd, GetPortStatus, |
| 108 | 0, port + 1, |
| 109 | (char *) &buf, sizeof(buf)); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 110 | spin_lock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 111 | |
| 112 | /* The companion should now own the port, |
| 113 | * but if something went wrong the port must not |
| 114 | * remain enabled. |
| 115 | */ |
| 116 | reg = &ehci->regs->port_status[port]; |
| 117 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
| 118 | if (status & PORT_OWNER) |
| 119 | ehci_writel(ehci, status | PORT_CSC, reg); |
| 120 | else { |
| 121 | ehci_dbg(ehci, "failed handover port %d: %x\n", |
| 122 | port + 1, status); |
| 123 | ehci_writel(ehci, status & ~PORT_PE, reg); |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | ehci->owned_ports = 0; |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 129 | spin_unlock_irq(&ehci->lock); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 130 | } |
| 131 | |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 132 | static int ehci_port_change(struct ehci_hcd *ehci) |
Matthew Garrett | 294d95f | 2011-01-11 12:26:48 -0500 | [diff] [blame] | 133 | { |
| 134 | int i = HCS_N_PORTS(ehci->hcs_params); |
| 135 | |
| 136 | /* First check if the controller indicates a change event */ |
| 137 | |
| 138 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) |
| 139 | return 1; |
| 140 | |
| 141 | /* |
| 142 | * Not all controllers appear to update this while going from D3 to D0, |
| 143 | * so check the individual port status registers as well |
| 144 | */ |
| 145 | |
| 146 | while (i--) |
| 147 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) |
| 148 | return 1; |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
Alan Stern | c5cf921 | 2012-06-28 11:19:02 -0400 | [diff] [blame] | 153 | static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
Alan Stern | 4147200 | 2010-06-25 14:02:14 -0400 | [diff] [blame] | 154 | bool suspending, bool do_wakeup) |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 155 | { |
| 156 | int port; |
| 157 | u32 temp; |
| 158 | |
| 159 | /* If remote wakeup is enabled for the root hub but disabled |
| 160 | * for the controller, we must adjust all the port wakeup flags |
| 161 | * when the controller is suspended or resumed. In all other |
| 162 | * cases they don't need to be changed. |
| 163 | */ |
Alan Stern | 4147200 | 2010-06-25 14:02:14 -0400 | [diff] [blame] | 164 | if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 165 | return; |
| 166 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 167 | spin_lock_irq(&ehci->lock); |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 168 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 169 | /* clear phy low-power mode before changing wakeup flags */ |
| 170 | if (ehci->has_hostpc) { |
| 171 | port = HCS_N_PORTS(ehci->hcs_params); |
| 172 | while (port--) { |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 173 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 174 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 175 | temp = ehci_readl(ehci, hostpc_reg); |
| 176 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); |
| 177 | } |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 178 | spin_unlock_irq(&ehci->lock); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 179 | msleep(5); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 180 | spin_lock_irq(&ehci->lock); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | port = HCS_N_PORTS(ehci->hcs_params); |
| 184 | while (port--) { |
| 185 | u32 __iomem *reg = &ehci->regs->port_status[port]; |
| 186 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
| 187 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
| 188 | |
| 189 | /* If we are suspending the controller, clear the flags. |
| 190 | * If we are resuming the controller, set the wakeup flags. |
| 191 | */ |
| 192 | if (!suspending) { |
| 193 | if (t1 & PORT_CONNECT) |
| 194 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
| 195 | else |
| 196 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
| 197 | } |
| 198 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", |
| 199 | port + 1, t1, t2); |
| 200 | ehci_writel(ehci, t2, reg); |
| 201 | } |
| 202 | |
| 203 | /* enter phy low-power mode again */ |
| 204 | if (ehci->has_hostpc) { |
| 205 | port = HCS_N_PORTS(ehci->hcs_params); |
| 206 | while (port--) { |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 207 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 208 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 209 | temp = ehci_readl(ehci, hostpc_reg); |
| 210 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); |
| 211 | } |
| 212 | } |
Alan Stern | ee0b9be | 2010-06-25 14:02:24 -0400 | [diff] [blame] | 213 | |
| 214 | /* Does the root hub have a port wakeup pending? */ |
Matthew Garrett | 294d95f | 2011-01-11 12:26:48 -0500 | [diff] [blame] | 215 | if (!suspending && ehci_port_change(ehci)) |
Alan Stern | ee0b9be | 2010-06-25 14:02:24 -0400 | [diff] [blame] | 216 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 217 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 218 | spin_unlock_irq(&ehci->lock); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 219 | } |
| 220 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 221 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
| 223 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 224 | int port; |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 225 | int mask; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 226 | int changed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Alan Stern | 8c774fe | 2007-02-01 16:09:59 -0500 | [diff] [blame] | 228 | ehci_dbg(ehci, "suspend root hub\n"); |
| 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | if (time_before (jiffies, ehci->next_statechange)) |
| 231 | msleep(5); |
| 232 | |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 233 | /* stop the schedules */ |
| 234 | ehci_quiesce(ehci); |
| 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | spin_lock_irq (&ehci->lock); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 237 | if (ehci->rh_state < EHCI_RH_RUNNING) |
| 238 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 240 | /* Once the controller is stopped, port resumes that are already |
| 241 | * in progress won't complete. Hence if remote wakeup is enabled |
| 242 | * for the root hub and any ports are in the middle of a resume or |
| 243 | * remote wakeup, we must fail the suspend. |
| 244 | */ |
| 245 | if (hcd->self.root_hub->do_remote_wakeup) { |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 246 | if (ehci->resuming_ports) { |
| 247 | spin_unlock_irq(&ehci->lock); |
| 248 | ehci_dbg(ehci, "suspend failed because a port is resuming\n"); |
| 249 | return -EBUSY; |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 250 | } |
| 251 | } |
| 252 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 253 | /* Unlike other USB host controller types, EHCI doesn't have |
| 254 | * any notion of "global" or bus-wide suspend. The driver has |
| 255 | * to manually suspend all the active unsuspended ports, and |
| 256 | * then manually resume them in the bus_resume() routine. |
| 257 | */ |
| 258 | ehci->bus_suspended = 0; |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 259 | ehci->owned_ports = 0; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 260 | changed = 0; |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 261 | port = HCS_N_PORTS(ehci->hcs_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | while (port--) { |
| 263 | u32 __iomem *reg = &ehci->regs->port_status [port]; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 264 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 265 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 267 | /* keep track of which ports we suspend */ |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 268 | if (t1 & PORT_OWNER) |
| 269 | set_bit(port, &ehci->owned_ports); |
| 270 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | t2 |= PORT_SUSPEND; |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 272 | set_bit(port, &ehci->bus_suspended); |
| 273 | } |
| 274 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 275 | /* enable remote wakeup on all ports, if told to do so */ |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 276 | if (hcd->self.root_hub->do_remote_wakeup) { |
| 277 | /* only enable appropriate wake bits, otherwise the |
| 278 | * hardware can not go phy low power mode. If a race |
| 279 | * condition happens here(connection change during bits |
| 280 | * set), the port change detection will finally fix it. |
| 281 | */ |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 282 | if (t1 & PORT_CONNECT) |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 283 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 284 | else |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 285 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 286 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | if (t1 != t2) { |
| 289 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", |
| 290 | port + 1, t1, t2); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 291 | ehci_writel(ehci, t2, reg); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 292 | changed = 1; |
| 293 | } |
| 294 | } |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 295 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 296 | if (changed && ehci->has_hostpc) { |
| 297 | spin_unlock_irq(&ehci->lock); |
| 298 | msleep(5); /* 5 ms for HCD to enter low-power mode */ |
| 299 | spin_lock_irq(&ehci->lock); |
| 300 | |
| 301 | port = HCS_N_PORTS(ehci->hcs_params); |
| 302 | while (port--) { |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 303 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 304 | u32 t3; |
| 305 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 306 | t3 = ehci_readl(ehci, hostpc_reg); |
| 307 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); |
| 308 | t3 = ehci_readl(ehci, hostpc_reg); |
| 309 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 310 | port, (t3 & HOSTPC_PHCD) ? |
| 311 | "succeeded" : "failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | } |
| 313 | } |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 314 | spin_unlock_irq(&ehci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
Alan Stern | cd930c9 | 2008-01-10 11:14:53 -0500 | [diff] [blame] | 316 | /* Apparently some devices need a >= 1-uframe delay here */ |
| 317 | if (ehci->bus_suspended) |
| 318 | udelay(150); |
| 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | /* turn off now-idle HC */ |
| 321 | ehci_halt (ehci); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 322 | |
| 323 | spin_lock_irq(&ehci->lock); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 324 | if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) |
| 325 | ehci_handle_controller_death(ehci); |
| 326 | if (ehci->rh_state != EHCI_RH_RUNNING) |
| 327 | goto done; |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 328 | ehci->rh_state = EHCI_RH_SUSPENDED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Alan Stern | 3c273a0 | 2012-07-11 11:22:49 -0400 | [diff] [blame] | 330 | end_unlink_async(ehci); |
Alan Stern | 32830f2 | 2012-07-11 11:22:53 -0400 | [diff] [blame] | 331 | unlink_empty_async(ehci); |
Alan Stern | df20225 | 2012-07-11 11:22:26 -0400 | [diff] [blame] | 332 | ehci_handle_intr_unlinks(ehci); |
Alan Stern | 55934eb | 2012-07-11 11:22:35 -0400 | [diff] [blame] | 333 | end_free_itds(ehci); |
David Brownell | cdc647a | 2008-04-02 13:40:20 -0700 | [diff] [blame] | 334 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 335 | /* allow remote wakeup */ |
| 336 | mask = INTR_MASK; |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 337 | if (!hcd->self.root_hub->do_remote_wakeup) |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 338 | mask &= ~STS_PCD; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 339 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
| 340 | ehci_readl(ehci, &ehci->regs->intr_enable); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 341 | |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 342 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 344 | ehci->enabled_hrtimer_events = 0; |
| 345 | ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | spin_unlock_irq (&ehci->lock); |
Jon Hunter | 015798b | 2009-08-12 11:57:59 -0400 | [diff] [blame] | 347 | |
Alan Stern | d58b4bc | 2012-07-11 11:21:54 -0400 | [diff] [blame] | 348 | hrtimer_cancel(&ehci->hrtimer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | |
| 353 | /* caller has locked the root hub, and should reset/reinit on error */ |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 354 | static int ehci_bus_resume (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
| 356 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 357 | u32 temp; |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 358 | u32 power_okay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | int i; |
Wang Zhi | d0f2fb2 | 2011-08-17 10:39:31 +0800 | [diff] [blame] | 360 | unsigned long resume_needed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | if (time_before (jiffies, ehci->next_statechange)) |
| 363 | msleep(5); |
| 364 | spin_lock_irq (&ehci->lock); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 365 | if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) |
| 366 | goto shutdown; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Jason Wessel | ad45f1d | 2009-08-20 15:39:58 -0500 | [diff] [blame] | 368 | if (unlikely(ehci->debug)) { |
Jan Beulich | 9fa5780 | 2012-09-18 12:23:02 +0100 | [diff] [blame] | 369 | if (!dbgp_reset_prep(hcd)) |
Jason Wessel | ad45f1d | 2009-08-20 15:39:58 -0500 | [diff] [blame] | 370 | ehci->debug = NULL; |
| 371 | else |
Jan Beulich | 9fa5780 | 2012-09-18 12:23:02 +0100 | [diff] [blame] | 372 | dbgp_external_startup(hcd); |
Jason Wessel | ad45f1d | 2009-08-20 15:39:58 -0500 | [diff] [blame] | 373 | } |
| 374 | |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 375 | /* Ideally and we've got a real resume here, and no port's power |
| 376 | * was lost. (For PCI, that means Vaux was maintained.) But we |
| 377 | * could instead be restoring a swsusp snapshot -- so that BIOS was |
| 378 | * the last user of the controller, not reset/pm hardware keeping |
| 379 | * state we gave to it. |
| 380 | */ |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 381 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
| 382 | ehci_dbg(ehci, "resume root hub%s\n", |
| 383 | power_okay ? "" : " after power loss"); |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 384 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 385 | /* at least some APM implementations will try to deliver |
| 386 | * IRQs right away, so delay them until we're ready. |
| 387 | */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 388 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 389 | |
| 390 | /* re-init operational registers */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 391 | ehci_writel(ehci, 0, &ehci->regs->segment); |
| 392 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); |
| 393 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
| 395 | /* restore CMD_RUN, framelist size, and irq threshold */ |
Alan Stern | 3d9545c | 2012-04-23 13:54:36 -0400 | [diff] [blame] | 396 | ehci->command |= CMD_RUN; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 397 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
Alan Stern | e879990 | 2011-08-18 16:31:30 -0400 | [diff] [blame] | 398 | ehci->rh_state = EHCI_RH_RUNNING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
Peter Chen | 6273f18 | 2012-10-18 12:24:43 +0800 | [diff] [blame] | 400 | /* |
| 401 | * According to Bugzilla #8190, the port status for some controllers |
| 402 | * will be wrong without a delay. At their wrong status, the port |
| 403 | * is enabled, but not suspended neither resumed. |
| 404 | */ |
| 405 | i = HCS_N_PORTS(ehci->hcs_params); |
| 406 | while (i--) { |
| 407 | temp = ehci_readl(ehci, &ehci->regs->port_status[i]); |
| 408 | if ((temp & PORT_PE) && |
| 409 | !(temp & (PORT_SUSPEND | PORT_RESUME))) { |
| 410 | ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); |
| 411 | spin_unlock_irq(&ehci->lock); |
| 412 | msleep(8); |
| 413 | spin_lock_irq(&ehci->lock); |
| 414 | break; |
| 415 | } |
| 416 | } |
| 417 | |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 418 | if (ehci->shutdown) |
| 419 | goto shutdown; |
Alan Stern | e198a31 | 2007-03-15 15:54:30 -0400 | [diff] [blame] | 420 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 421 | /* clear phy low-power mode before resume */ |
| 422 | if (ehci->bus_suspended && ehci->has_hostpc) { |
| 423 | i = HCS_N_PORTS(ehci->hcs_params); |
| 424 | while (i--) { |
| 425 | if (test_bit(i, &ehci->bus_suspended)) { |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 426 | u32 __iomem *hostpc_reg = |
| 427 | &ehci->regs->hostpc[i]; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 428 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 429 | temp = ehci_readl(ehci, hostpc_reg); |
| 430 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, |
| 431 | hostpc_reg); |
| 432 | } |
| 433 | } |
| 434 | spin_unlock_irq(&ehci->lock); |
| 435 | msleep(5); |
| 436 | spin_lock_irq(&ehci->lock); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 437 | if (ehci->shutdown) |
| 438 | goto shutdown; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 439 | } |
| 440 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 441 | /* manually resume the ports we suspended during bus_suspend() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | i = HCS_N_PORTS (ehci->hcs_params); |
| 443 | while (i--) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 444 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 445 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 446 | if (test_bit(i, &ehci->bus_suspended) && |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 447 | (temp & PORT_SUSPEND)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | temp |= PORT_RESUME; |
Wang Zhi | d0f2fb2 | 2011-08-17 10:39:31 +0800 | [diff] [blame] | 449 | set_bit(i, &resume_needed); |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 450 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 451 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 453 | |
| 454 | /* msleep for 20ms only if code is trying to resume port */ |
| 455 | if (resume_needed) { |
| 456 | spin_unlock_irq(&ehci->lock); |
| 457 | msleep(20); |
| 458 | spin_lock_irq(&ehci->lock); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 459 | if (ehci->shutdown) |
| 460 | goto shutdown; |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 461 | } |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | i = HCS_N_PORTS (ehci->hcs_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | while (i--) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 465 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
Wang Zhi | d0f2fb2 | 2011-08-17 10:39:31 +0800 | [diff] [blame] | 466 | if (test_bit(i, &resume_needed)) { |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 467 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 468 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 469 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
| 470 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
| 473 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 474 | spin_unlock_irq(&ehci->lock); |
| 475 | |
| 476 | ehci_handover_companion_ports(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
| 478 | /* Now we can safely re-enable irqs */ |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 479 | spin_lock_irq(&ehci->lock); |
| 480 | if (ehci->shutdown) |
| 481 | goto shutdown; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 482 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
Alan Stern | 15be105 | 2012-07-11 11:21:17 -0400 | [diff] [blame] | 483 | (void) ehci_readl(ehci, &ehci->regs->intr_enable); |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 484 | spin_unlock_irq(&ehci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | return 0; |
Alan Stern | 43fe3a9 | 2012-07-11 11:23:16 -0400 | [diff] [blame] | 487 | |
| 488 | shutdown: |
| 489 | spin_unlock_irq(&ehci->lock); |
| 490 | return -ESHUTDOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | #else |
| 494 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 495 | #define ehci_bus_suspend NULL |
| 496 | #define ehci_bus_resume NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | |
| 498 | #endif /* CONFIG_PM */ |
| 499 | |
| 500 | /*-------------------------------------------------------------------------*/ |
| 501 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 502 | /* |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 503 | * Sets the owner of a port |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 504 | */ |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 505 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 506 | { |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 507 | u32 __iomem *status_reg; |
| 508 | u32 port_status; |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 509 | int try; |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 510 | |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 511 | status_reg = &ehci->regs->port_status[portnum]; |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 512 | |
| 513 | /* |
| 514 | * The controller won't set the OWNER bit if the port is |
| 515 | * enabled, so this loop will sometimes require at least two |
| 516 | * iterations: one to disable the port and one to set OWNER. |
| 517 | */ |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 518 | for (try = 4; try > 0; --try) { |
| 519 | spin_lock_irq(&ehci->lock); |
| 520 | port_status = ehci_readl(ehci, status_reg); |
| 521 | if ((port_status & PORT_OWNER) == new_owner |
| 522 | || (port_status & (PORT_OWNER | PORT_CONNECT)) |
| 523 | == 0) |
| 524 | try = 0; |
| 525 | else { |
| 526 | port_status ^= PORT_OWNER; |
| 527 | port_status &= ~(PORT_PE | PORT_RWC_BITS); |
| 528 | ehci_writel(ehci, port_status, status_reg); |
| 529 | } |
| 530 | spin_unlock_irq(&ehci->lock); |
| 531 | if (try > 1) |
| 532 | msleep(5); |
| 533 | } |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 534 | } |
| 535 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 536 | /*-------------------------------------------------------------------------*/ |
| 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | static int check_reset_complete ( |
| 539 | struct ehci_hcd *ehci, |
| 540 | int index, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 541 | u32 __iomem *status_reg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | int port_status |
| 543 | ) { |
David Brownell | cd4cdc9 | 2008-01-24 12:39:43 -0800 | [diff] [blame] | 544 | if (!(port_status & PORT_CONNECT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | return port_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
| 547 | /* if reset finished and it's still not enabled -- handoff */ |
| 548 | if (!(port_status & PORT_PE)) { |
| 549 | |
| 550 | /* with integrated TT, there's nobody to hand it to! */ |
| 551 | if (ehci_is_TDI(ehci)) { |
| 552 | ehci_dbg (ehci, |
| 553 | "Failed to enable port %d on root hub TT\n", |
| 554 | index+1); |
| 555 | return port_status; |
| 556 | } |
| 557 | |
| 558 | ehci_dbg (ehci, "port %d full speed --> companion\n", |
| 559 | index + 1); |
| 560 | |
| 561 | // what happens if HCS_N_CC(params) == 0 ? |
| 562 | port_status |= PORT_OWNER; |
David Brownell | 10f6524 | 2005-08-31 10:55:38 -0700 | [diff] [blame] | 563 | port_status &= ~PORT_RWC_BITS; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 564 | ehci_writel(ehci, port_status, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Vitaly Bordug | 796bcae | 2008-11-09 19:43:30 +0100 | [diff] [blame] | 566 | /* ensure 440EPX ohci controller state is operational */ |
| 567 | if (ehci->has_amcc_usb23) |
| 568 | set_ohci_hcfs(ehci, 1); |
| 569 | } else { |
Peter Chen | 0ca7eb2 | 2012-03-29 09:50:06 +0800 | [diff] [blame] | 570 | ehci_dbg(ehci, "port %d reset complete, port enabled\n", |
| 571 | index + 1); |
Vitaly Bordug | 796bcae | 2008-11-09 19:43:30 +0100 | [diff] [blame] | 572 | /* ensure 440EPx ohci controller state is suspended */ |
| 573 | if (ehci->has_amcc_usb23) |
| 574 | set_ohci_hcfs(ehci, 0); |
| 575 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | return port_status; |
| 578 | } |
| 579 | |
| 580 | /*-------------------------------------------------------------------------*/ |
| 581 | |
| 582 | |
| 583 | /* build "status change" packet (one or two bytes) from HC registers */ |
| 584 | |
| 585 | static int |
| 586 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) |
| 587 | { |
| 588 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 589 | u32 temp, status; |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 590 | u32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | int ports, i, retval = 1; |
| 592 | unsigned long flags; |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 593 | u32 ppcd = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | /* init status to no-changes */ |
| 596 | buf [0] = 0; |
| 597 | ports = HCS_N_PORTS (ehci->hcs_params); |
| 598 | if (ports > 7) { |
| 599 | buf [1] = 0; |
| 600 | retval++; |
| 601 | } |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 602 | |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 603 | /* Inform the core about resumes-in-progress by returning |
| 604 | * a non-zero value even if there are no status changes. |
| 605 | */ |
| 606 | status = ehci->resuming_ports; |
| 607 | |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 608 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
| 609 | * causing massive log spam unless we completely ignore them. It |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 610 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 611 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
| 612 | * PORT_POWER; that's surprising, but maybe within-spec. |
| 613 | */ |
| 614 | if (!ignore_oc) |
| 615 | mask = PORT_CSC | PORT_PEC | PORT_OCC; |
| 616 | else |
| 617 | mask = PORT_CSC | PORT_PEC; |
| 618 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND |
| 619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | /* no hub change reports (bit 0) for now (power, ...) */ |
| 621 | |
| 622 | /* port N changes (bit N)? */ |
| 623 | spin_lock_irqsave (&ehci->lock, flags); |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 624 | |
| 625 | /* get per-port change detect bits */ |
| 626 | if (ehci->has_ppcd) |
| 627 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; |
| 628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | for (i = 0; i < ports; i++) { |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 630 | /* leverage per-port change bits feature */ |
| 631 | if (ehci->has_ppcd && !(ppcd & (1 << i))) |
| 632 | continue; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 633 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 634 | |
| 635 | /* |
| 636 | * Return status information even for ports with OWNER set. |
| 637 | * Otherwise khubd wouldn't see the disconnect event when a |
| 638 | * high-speed device is switched over to the companion |
| 639 | * controller by the user. |
| 640 | */ |
| 641 | |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 642 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
| 643 | || (ehci->reset_done[i] && time_after_eq( |
| 644 | jiffies, ehci->reset_done[i]))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | if (i < 7) |
| 646 | buf [0] |= 1 << (i + 1); |
| 647 | else |
| 648 | buf [1] |= 1 << (i - 7); |
| 649 | status = STS_PCD; |
| 650 | } |
| 651 | } |
Alan Stern | ee74290 | 2013-01-25 17:17:43 -0500 | [diff] [blame] | 652 | |
| 653 | /* If a resume is in progress, make sure it can finish */ |
| 654 | if (ehci->resuming_ports) |
| 655 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); |
| 656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 658 | return status ? retval : 0; |
| 659 | } |
| 660 | |
| 661 | /*-------------------------------------------------------------------------*/ |
| 662 | |
| 663 | static void |
| 664 | ehci_hub_descriptor ( |
| 665 | struct ehci_hcd *ehci, |
| 666 | struct usb_hub_descriptor *desc |
| 667 | ) { |
| 668 | int ports = HCS_N_PORTS (ehci->hcs_params); |
| 669 | u16 temp; |
| 670 | |
| 671 | desc->bDescriptorType = 0x29; |
| 672 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
| 673 | desc->bHubContrCurrent = 0; |
| 674 | |
| 675 | desc->bNbrPorts = ports; |
| 676 | temp = 1 + (ports / 8); |
| 677 | desc->bDescLength = 7 + 2 * temp; |
| 678 | |
| 679 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
John Youn | dbe79bb | 2001-09-17 00:00:00 -0700 | [diff] [blame] | 680 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
| 681 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
| 683 | temp = 0x0008; /* per-port overcurrent reporting */ |
| 684 | if (HCS_PPC (ehci->hcs_params)) |
| 685 | temp |= 0x0001; /* per-port power control */ |
David Brownell | 56c1e26 | 2005-04-09 09:00:29 -0700 | [diff] [blame] | 686 | else |
| 687 | temp |= 0x0002; /* no power switching */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | #if 0 |
| 689 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. |
| 690 | if (HCS_INDICATOR (ehci->hcs_params)) |
| 691 | temp |= 0x0080; /* per-port indicators (LEDs) */ |
| 692 | #endif |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 693 | desc->wHubCharacteristics = cpu_to_le16(temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | /*-------------------------------------------------------------------------*/ |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | static int ehci_hub_control ( |
| 699 | struct usb_hcd *hcd, |
| 700 | u16 typeReq, |
| 701 | u16 wValue, |
| 702 | u16 wIndex, |
| 703 | char *buf, |
| 704 | u16 wLength |
| 705 | ) { |
| 706 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 707 | int ports = HCS_N_PORTS (ehci->hcs_params); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 708 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
| 709 | (wIndex & 0xff) - 1]; |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 710 | u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1]; |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 711 | u32 temp, temp1, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | unsigned long flags; |
| 713 | int retval = 0; |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 714 | unsigned selector; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | /* |
| 717 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. |
| 718 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. |
| 719 | * (track current state ourselves) ... blink for diagnostics, |
| 720 | * power, "this is the one", etc. EHCI spec supports this. |
| 721 | */ |
| 722 | |
| 723 | spin_lock_irqsave (&ehci->lock, flags); |
| 724 | switch (typeReq) { |
| 725 | case ClearHubFeature: |
| 726 | switch (wValue) { |
| 727 | case C_HUB_LOCAL_POWER: |
| 728 | case C_HUB_OVER_CURRENT: |
| 729 | /* no hub-wide feature/status flags */ |
| 730 | break; |
| 731 | default: |
| 732 | goto error; |
| 733 | } |
| 734 | break; |
| 735 | case ClearPortFeature: |
| 736 | if (!wIndex || wIndex > ports) |
| 737 | goto error; |
| 738 | wIndex--; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 739 | temp = ehci_readl(ehci, status_reg); |
Stephen Warren | 6d5f89c | 2012-04-18 15:32:46 -0600 | [diff] [blame] | 740 | temp &= ~PORT_RWC_BITS; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 741 | |
| 742 | /* |
| 743 | * Even if OWNER is set, so the port is owned by the |
| 744 | * companion controller, khubd needs to be able to clear |
| 745 | * the port-change status bits (especially |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 746 | * USB_PORT_STAT_C_CONNECTION). |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 747 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
| 749 | switch (wValue) { |
| 750 | case USB_PORT_FEAT_ENABLE: |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 751 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | break; |
| 753 | case USB_PORT_FEAT_C_ENABLE: |
Stephen Warren | 6d5f89c | 2012-04-18 15:32:46 -0600 | [diff] [blame] | 754 | ehci_writel(ehci, temp | PORT_PEC, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | break; |
| 756 | case USB_PORT_FEAT_SUSPEND: |
| 757 | if (temp & PORT_RESET) |
| 758 | goto error; |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 759 | if (ehci->no_selective_suspend) |
| 760 | break; |
Anatolij Gustschin | 83722bc | 2011-04-18 22:02:00 +0200 | [diff] [blame] | 761 | #ifdef CONFIG_USB_OTG |
| 762 | if ((hcd->self.otg_port == (wIndex + 1)) |
| 763 | && hcd->self.b_hnp_enable) { |
Richard Zhao | c2e935a | 2012-06-13 20:34:12 +0800 | [diff] [blame] | 764 | otg_start_hnp(hcd->phy->otg); |
Anatolij Gustschin | 83722bc | 2011-04-18 22:02:00 +0200 | [diff] [blame] | 765 | break; |
| 766 | } |
| 767 | #endif |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 768 | if (!(temp & PORT_SUSPEND)) |
| 769 | break; |
| 770 | if ((temp & PORT_PE) == 0) |
| 771 | goto error; |
| 772 | |
| 773 | /* clear phy low-power mode before resume */ |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 774 | if (ehci->has_hostpc) { |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 775 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 776 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, |
Alek Du | eab80de | 2010-05-10 11:17:49 +0800 | [diff] [blame] | 777 | hostpc_reg); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 778 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 779 | msleep(5);/* wait to leave low-power mode */ |
| 780 | spin_lock_irqsave(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 782 | /* resume signaling for 20 msec */ |
Stephen Warren | 6d5f89c | 2012-04-18 15:32:46 -0600 | [diff] [blame] | 783 | temp &= ~PORT_WAKE_BITS; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 784 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
| 785 | ehci->reset_done[wIndex] = jiffies |
| 786 | + msecs_to_jiffies(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | break; |
| 788 | case USB_PORT_FEAT_C_SUSPEND: |
Alan Stern | d1f114d | 2008-05-20 16:58:58 -0400 | [diff] [blame] | 789 | clear_bit(wIndex, &ehci->port_c_suspend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | break; |
| 791 | case USB_PORT_FEAT_POWER: |
| 792 | if (HCS_PPC (ehci->hcs_params)) |
Stephen Warren | 6d5f89c | 2012-04-18 15:32:46 -0600 | [diff] [blame] | 793 | ehci_writel(ehci, temp & ~PORT_POWER, |
| 794 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | break; |
| 796 | case USB_PORT_FEAT_C_CONNECTION: |
Stephen Warren | 6d5f89c | 2012-04-18 15:32:46 -0600 | [diff] [blame] | 797 | ehci_writel(ehci, temp | PORT_CSC, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | break; |
| 799 | case USB_PORT_FEAT_C_OVER_CURRENT: |
Stephen Warren | 6d5f89c | 2012-04-18 15:32:46 -0600 | [diff] [blame] | 800 | ehci_writel(ehci, temp | PORT_OCC, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | break; |
| 802 | case USB_PORT_FEAT_C_RESET: |
| 803 | /* GetPortStatus clears reset */ |
| 804 | break; |
| 805 | default: |
| 806 | goto error; |
| 807 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 808 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | break; |
| 810 | case GetHubDescriptor: |
| 811 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) |
| 812 | buf); |
| 813 | break; |
| 814 | case GetHubStatus: |
| 815 | /* no hub-wide feature/status flags */ |
| 816 | memset (buf, 0, 4); |
| 817 | //cpu_to_le32s ((u32 *) buf); |
| 818 | break; |
| 819 | case GetPortStatus: |
| 820 | if (!wIndex || wIndex > ports) |
| 821 | goto error; |
| 822 | wIndex--; |
| 823 | status = 0; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 824 | temp = ehci_readl(ehci, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
| 826 | // wPortChange bits |
| 827 | if (temp & PORT_CSC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 828 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | if (temp & PORT_PEC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 830 | status |= USB_PORT_STAT_C_ENABLE << 16; |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 831 | |
| 832 | if ((temp & PORT_OCC) && !ignore_oc){ |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 833 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 835 | /* |
| 836 | * Hubs should disable port power on over-current. |
| 837 | * However, not all EHCI implementations do this |
| 838 | * automatically, even if they _do_ support per-port |
| 839 | * power switching; they're allowed to just limit the |
| 840 | * current. khubd will turn the power back on. |
| 841 | */ |
Sergei Shtylyov | 81463c1 | 2011-07-06 23:19:38 +0400 | [diff] [blame] | 842 | if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 843 | ehci_writel(ehci, |
| 844 | temp & ~(PORT_RWC_BITS | PORT_POWER), |
| 845 | status_reg); |
Sergei Shtylyov | 81463c1 | 2011-07-06 23:19:38 +0400 | [diff] [blame] | 846 | temp = ehci_readl(ehci, status_reg); |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 847 | } |
| 848 | } |
| 849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | /* whoever resumes must GetPortStatus to complete it!! */ |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 851 | if (temp & PORT_RESUME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 853 | /* Remote Wakeup received? */ |
| 854 | if (!ehci->reset_done[wIndex]) { |
| 855 | /* resume signaling for 20 msec */ |
| 856 | ehci->reset_done[wIndex] = jiffies |
| 857 | + msecs_to_jiffies(20); |
Alan Stern | f292e7f | 2013-01-25 17:09:49 -0500 | [diff] [blame] | 858 | usb_hcd_start_port_resume(&hcd->self, wIndex); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 859 | /* check the port again */ |
| 860 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, |
| 861 | ehci->reset_done[wIndex]); |
| 862 | } |
| 863 | |
| 864 | /* resume completed? */ |
| 865 | else if (time_after_eq(jiffies, |
| 866 | ehci->reset_done[wIndex])) { |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 867 | clear_bit(wIndex, &ehci->suspended_ports); |
Alan Stern | d1f114d | 2008-05-20 16:58:58 -0400 | [diff] [blame] | 868 | set_bit(wIndex, &ehci->port_c_suspend); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 869 | ehci->reset_done[wIndex] = 0; |
Alan Stern | f292e7f | 2013-01-25 17:09:49 -0500 | [diff] [blame] | 870 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 871 | |
| 872 | /* stop resume signaling */ |
| 873 | temp = ehci_readl(ehci, status_reg); |
| 874 | ehci_writel(ehci, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 875 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
| 876 | status_reg); |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 877 | clear_bit(wIndex, &ehci->resuming_ports); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 878 | retval = handshake(ehci, status_reg, |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 879 | PORT_RESUME, 0, 2000 /* 2msec */); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 880 | if (retval != 0) { |
| 881 | ehci_err(ehci, |
| 882 | "port %d resume error %d\n", |
| 883 | wIndex + 1, retval); |
| 884 | goto error; |
| 885 | } |
| 886 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | /* whoever resets must GetPortStatus to complete it!! */ |
| 891 | if ((temp & PORT_RESET) |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 892 | && time_after_eq(jiffies, |
| 893 | ehci->reset_done[wIndex])) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 894 | status |= USB_PORT_STAT_C_RESET << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | ehci->reset_done [wIndex] = 0; |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 896 | clear_bit(wIndex, &ehci->resuming_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | /* force reset to complete */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 899 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 900 | status_reg); |
David Brownell | c22fa3a | 2005-06-13 07:15:28 -0700 | [diff] [blame] | 901 | /* REVISIT: some hardware needs 550+ usec to clear |
| 902 | * this bit; seems too long to spin routinely... |
| 903 | */ |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 904 | retval = handshake(ehci, status_reg, |
Dinh Nguyen | 6307e09 | 2010-04-13 11:13:15 -0500 | [diff] [blame] | 905 | PORT_RESET, 0, 1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | if (retval != 0) { |
| 907 | ehci_err (ehci, "port %d reset error %d\n", |
| 908 | wIndex + 1, retval); |
| 909 | goto error; |
| 910 | } |
| 911 | |
| 912 | /* see what we found out */ |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 913 | temp = check_reset_complete (ehci, wIndex, status_reg, |
| 914 | ehci_readl(ehci, status_reg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
| 916 | |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 917 | if (!(temp & (PORT_RESUME|PORT_RESET))) { |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 918 | ehci->reset_done[wIndex] = 0; |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 919 | clear_bit(wIndex, &ehci->resuming_ports); |
| 920 | } |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 921 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 922 | /* transfer dedicated ports to the companion hc */ |
| 923 | if ((temp & PORT_CONNECT) && |
| 924 | test_bit(wIndex, &ehci->companion_ports)) { |
| 925 | temp &= ~PORT_RWC_BITS; |
| 926 | temp |= PORT_OWNER; |
| 927 | ehci_writel(ehci, temp, status_reg); |
| 928 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); |
| 929 | temp = ehci_readl(ehci, status_reg); |
| 930 | } |
| 931 | |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 932 | /* |
| 933 | * Even if OWNER is set, there's no harm letting khubd |
| 934 | * see the wPortStatus values (they should all be 0 except |
| 935 | * for PORT_POWER anyway). |
| 936 | */ |
| 937 | |
| 938 | if (temp & PORT_CONNECT) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 939 | status |= USB_PORT_STAT_CONNECTION; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 940 | // status may be from integrated TT |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 941 | if (ehci->has_hostpc) { |
| 942 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 943 | status |= ehci_port_speed(ehci, temp1); |
| 944 | } else |
| 945 | status |= ehci_port_speed(ehci, temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | } |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 947 | if (temp & PORT_PE) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 948 | status |= USB_PORT_STAT_ENABLE; |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 949 | |
| 950 | /* maybe the port was unsuspended without our knowledge */ |
| 951 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 952 | status |= USB_PORT_STAT_SUSPEND; |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 953 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
| 954 | clear_bit(wIndex, &ehci->suspended_ports); |
Alan Stern | a448e4d | 2012-04-03 15:24:30 -0400 | [diff] [blame] | 955 | clear_bit(wIndex, &ehci->resuming_ports); |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 956 | ehci->reset_done[wIndex] = 0; |
| 957 | if (temp & PORT_PE) |
| 958 | set_bit(wIndex, &ehci->port_c_suspend); |
Alan Stern | f292e7f | 2013-01-25 17:09:49 -0500 | [diff] [blame] | 959 | usb_hcd_end_port_resume(&hcd->self, wIndex); |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 960 | } |
| 961 | |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 962 | if (temp & PORT_OC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 963 | status |= USB_PORT_STAT_OVERCURRENT; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 964 | if (temp & PORT_RESET) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 965 | status |= USB_PORT_STAT_RESET; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 966 | if (temp & PORT_POWER) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 967 | status |= USB_PORT_STAT_POWER; |
Alan Stern | d1f114d | 2008-05-20 16:58:58 -0400 | [diff] [blame] | 968 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 969 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
David Brownell | 9776afc | 2008-02-01 11:42:05 -0800 | [diff] [blame] | 971 | #ifndef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
| 973 | #endif |
| 974 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); |
Harvey Harrison | a5abdea | 2008-04-29 01:03:40 -0700 | [diff] [blame] | 975 | put_unaligned_le32(status, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | break; |
| 977 | case SetHubFeature: |
| 978 | switch (wValue) { |
| 979 | case C_HUB_LOCAL_POWER: |
| 980 | case C_HUB_OVER_CURRENT: |
| 981 | /* no hub-wide feature/status flags */ |
| 982 | break; |
| 983 | default: |
| 984 | goto error; |
| 985 | } |
| 986 | break; |
| 987 | case SetPortFeature: |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 988 | selector = wIndex >> 8; |
| 989 | wIndex &= 0xff; |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 990 | if (unlikely(ehci->debug)) { |
| 991 | /* If the debug port is active any port |
| 992 | * feature requests should get denied */ |
| 993 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && |
| 994 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { |
| 995 | retval = -ENODEV; |
| 996 | goto error_exit; |
| 997 | } |
| 998 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | if (!wIndex || wIndex > ports) |
| 1000 | goto error; |
| 1001 | wIndex--; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1002 | temp = ehci_readl(ehci, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | if (temp & PORT_OWNER) |
| 1004 | break; |
| 1005 | |
David Brownell | 10f6524 | 2005-08-31 10:55:38 -0700 | [diff] [blame] | 1006 | temp &= ~PORT_RWC_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | switch (wValue) { |
| 1008 | case USB_PORT_FEAT_SUSPEND: |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 1009 | if (ehci->no_selective_suspend) |
| 1010 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | if ((temp & PORT_PE) == 0 |
| 1012 | || (temp & PORT_RESET) != 0) |
| 1013 | goto error; |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 1014 | |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 1015 | /* After above check the port must be connected. |
| 1016 | * Set appropriate bit thus could put phy into low power |
| 1017 | * mode if we have hostpc feature |
| 1018 | */ |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 1019 | temp &= ~PORT_WKCONN_E; |
| 1020 | temp |= PORT_WKDISC_E | PORT_WKOC_E; |
| 1021 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
Alan Stern | a46af4e | 2012-06-25 12:19:03 -0400 | [diff] [blame] | 1022 | if (ehci->has_hostpc) { |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 1023 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 1024 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 1025 | spin_lock_irqsave(&ehci->lock, flags); |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 1026 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 1027 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, |
| 1028 | hostpc_reg); |
| 1029 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 1030 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", |
| 1031 | wIndex, (temp1 & HOSTPC_PHCD) ? |
| 1032 | "succeeded" : "failed"); |
| 1033 | } |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 1034 | set_bit(wIndex, &ehci->suspended_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | break; |
| 1036 | case USB_PORT_FEAT_POWER: |
| 1037 | if (HCS_PPC (ehci->hcs_params)) |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 1038 | ehci_writel(ehci, temp | PORT_POWER, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1039 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | break; |
| 1041 | case USB_PORT_FEAT_RESET: |
| 1042 | if (temp & PORT_RESUME) |
| 1043 | goto error; |
| 1044 | /* line status bits may report this as low speed, |
| 1045 | * which can be fine if this root hub has a |
| 1046 | * transaction translator built in. |
| 1047 | */ |
| 1048 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT |
| 1049 | && !ehci_is_TDI(ehci) |
| 1050 | && PORT_USB11 (temp)) { |
| 1051 | ehci_dbg (ehci, |
| 1052 | "port %d low speed --> companion\n", |
| 1053 | wIndex + 1); |
| 1054 | temp |= PORT_OWNER; |
| 1055 | } else { |
| 1056 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); |
| 1057 | temp |= PORT_RESET; |
| 1058 | temp &= ~PORT_PE; |
| 1059 | |
| 1060 | /* |
| 1061 | * caller must wait, then call GetPortStatus |
| 1062 | * usb 2.0 spec says 50 ms resets on root |
| 1063 | */ |
| 1064 | ehci->reset_done [wIndex] = jiffies |
| 1065 | + msecs_to_jiffies (50); |
| 1066 | } |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1067 | ehci_writel(ehci, temp, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | break; |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1069 | |
| 1070 | /* For downstream facing ports (these): one hub port is put |
| 1071 | * into test mode according to USB2 11.24.2.13, then the hub |
| 1072 | * must be reset (which for root hub now means rmmod+modprobe, |
| 1073 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info |
| 1074 | * about the EHCI-specific stuff. |
| 1075 | */ |
| 1076 | case USB_PORT_FEAT_TEST: |
| 1077 | if (!selector || selector > 5) |
| 1078 | goto error; |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 1079 | spin_unlock_irqrestore(&ehci->lock, flags); |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1080 | ehci_quiesce(ehci); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 1081 | spin_lock_irqsave(&ehci->lock, flags); |
Boris Todorov | 77636c8 | 2011-07-11 12:03:33 +0300 | [diff] [blame] | 1082 | |
| 1083 | /* Put all enabled ports into suspend */ |
| 1084 | while (ports--) { |
| 1085 | u32 __iomem *sreg = |
| 1086 | &ehci->regs->port_status[ports]; |
| 1087 | |
| 1088 | temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; |
| 1089 | if (temp & PORT_PE) |
| 1090 | ehci_writel(ehci, temp | PORT_SUSPEND, |
| 1091 | sreg); |
| 1092 | } |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 1093 | |
| 1094 | spin_unlock_irqrestore(&ehci->lock, flags); |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1095 | ehci_halt(ehci); |
Alan Stern | c4f3476 | 2012-07-11 11:23:10 -0400 | [diff] [blame] | 1096 | spin_lock_irqsave(&ehci->lock, flags); |
| 1097 | |
Boris Todorov | 77636c8 | 2011-07-11 12:03:33 +0300 | [diff] [blame] | 1098 | temp = ehci_readl(ehci, status_reg); |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1099 | temp |= selector << 16; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1100 | ehci_writel(ehci, temp, status_reg); |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1101 | break; |
| 1102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | default: |
| 1104 | goto error; |
| 1105 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 1106 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | break; |
| 1108 | |
| 1109 | default: |
| 1110 | error: |
| 1111 | /* "stall" on error */ |
| 1112 | retval = -EPIPE; |
| 1113 | } |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 1114 | error_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 1116 | return retval; |
| 1117 | } |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 1118 | |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1119 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 1120 | { |
| 1121 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1122 | |
| 1123 | if (ehci_is_TDI(ehci)) |
| 1124 | return; |
| 1125 | set_owner(ehci, --portnum, PORT_OWNER); |
| 1126 | } |
| 1127 | |
Alan Stern | 3e02320 | 2012-11-01 11:12:58 -0400 | [diff] [blame] | 1128 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
Alan Stern | 3a31155 | 2008-05-20 16:58:29 -0400 | [diff] [blame] | 1129 | { |
| 1130 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1131 | u32 __iomem *reg; |
| 1132 | |
| 1133 | if (ehci_is_TDI(ehci)) |
| 1134 | return 0; |
| 1135 | reg = &ehci->regs->port_status[portnum - 1]; |
| 1136 | return ehci_readl(ehci, reg) & PORT_OWNER; |
| 1137 | } |