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 | |
| 59 | /* Give the connections some time to appear */ |
| 60 | msleep(20); |
| 61 | |
| 62 | port = HCS_N_PORTS(ehci->hcs_params); |
| 63 | while (port--) { |
| 64 | if (test_bit(port, &ehci->owned_ports)) { |
| 65 | reg = &ehci->regs->port_status[port]; |
Alan Stern | 3c519b8 | 2007-05-04 11:55:31 -0400 | [diff] [blame] | 66 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 67 | |
| 68 | /* Port already owned by companion? */ |
| 69 | if (status & PORT_OWNER) |
| 70 | clear_bit(port, &ehci->owned_ports); |
Alan Stern | 3c519b8 | 2007-05-04 11:55:31 -0400 | [diff] [blame] | 71 | else if (test_bit(port, &ehci->companion_ports)) |
| 72 | ehci_writel(ehci, status & ~PORT_PE, reg); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 73 | else |
| 74 | ehci_hub_control(hcd, SetPortFeature, |
| 75 | USB_PORT_FEAT_RESET, port + 1, |
| 76 | NULL, 0); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | if (!ehci->owned_ports) |
| 81 | return; |
| 82 | msleep(90); /* Wait for resets to complete */ |
| 83 | |
| 84 | port = HCS_N_PORTS(ehci->hcs_params); |
| 85 | while (port--) { |
| 86 | if (test_bit(port, &ehci->owned_ports)) { |
| 87 | ehci_hub_control(hcd, GetPortStatus, |
| 88 | 0, port + 1, |
| 89 | (char *) &buf, sizeof(buf)); |
| 90 | |
| 91 | /* The companion should now own the port, |
| 92 | * but if something went wrong the port must not |
| 93 | * remain enabled. |
| 94 | */ |
| 95 | reg = &ehci->regs->port_status[port]; |
| 96 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
| 97 | if (status & PORT_OWNER) |
| 98 | ehci_writel(ehci, status | PORT_CSC, reg); |
| 99 | else { |
| 100 | ehci_dbg(ehci, "failed handover port %d: %x\n", |
| 101 | port + 1, status); |
| 102 | ehci_writel(ehci, status & ~PORT_PE, reg); |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | ehci->owned_ports = 0; |
| 108 | } |
| 109 | |
Matthew Garrett | 294d95f | 2011-01-11 12:26:48 -0500 | [diff] [blame] | 110 | static int ehci_port_change(struct ehci_hcd *ehci) |
| 111 | { |
| 112 | int i = HCS_N_PORTS(ehci->hcs_params); |
| 113 | |
| 114 | /* First check if the controller indicates a change event */ |
| 115 | |
| 116 | if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) |
| 117 | return 1; |
| 118 | |
| 119 | /* |
| 120 | * Not all controllers appear to update this while going from D3 to D0, |
| 121 | * so check the individual port status registers as well |
| 122 | */ |
| 123 | |
| 124 | while (i--) |
| 125 | if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) |
| 126 | return 1; |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
Fabio Estevam | 0b0cd6c | 2011-04-12 09:31:54 -0300 | [diff] [blame] | 131 | static __maybe_unused void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, |
Alan Stern | 4147200 | 2010-06-25 14:02:14 -0400 | [diff] [blame] | 132 | bool suspending, bool do_wakeup) |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 133 | { |
| 134 | int port; |
| 135 | u32 temp; |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 136 | unsigned long flags; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 137 | |
| 138 | /* If remote wakeup is enabled for the root hub but disabled |
| 139 | * for the controller, we must adjust all the port wakeup flags |
| 140 | * when the controller is suspended or resumed. In all other |
| 141 | * cases they don't need to be changed. |
| 142 | */ |
Alan Stern | 4147200 | 2010-06-25 14:02:14 -0400 | [diff] [blame] | 143 | 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] | 144 | return; |
| 145 | |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 146 | spin_lock_irqsave(&ehci->lock, flags); |
| 147 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 148 | /* clear phy low-power mode before changing wakeup flags */ |
| 149 | if (ehci->has_hostpc) { |
| 150 | port = HCS_N_PORTS(ehci->hcs_params); |
| 151 | while (port--) { |
| 152 | u32 __iomem *hostpc_reg; |
| 153 | |
| 154 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs |
| 155 | + HOSTPC0 + 4 * port); |
| 156 | temp = ehci_readl(ehci, hostpc_reg); |
| 157 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); |
| 158 | } |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 159 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 160 | msleep(5); |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 161 | spin_lock_irqsave(&ehci->lock, flags); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | port = HCS_N_PORTS(ehci->hcs_params); |
| 165 | while (port--) { |
| 166 | u32 __iomem *reg = &ehci->regs->port_status[port]; |
| 167 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
| 168 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
| 169 | |
| 170 | /* If we are suspending the controller, clear the flags. |
| 171 | * If we are resuming the controller, set the wakeup flags. |
| 172 | */ |
| 173 | if (!suspending) { |
| 174 | if (t1 & PORT_CONNECT) |
| 175 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
| 176 | else |
| 177 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
| 178 | } |
| 179 | ehci_vdbg(ehci, "port %d, %08x -> %08x\n", |
| 180 | port + 1, t1, t2); |
| 181 | ehci_writel(ehci, t2, reg); |
| 182 | } |
| 183 | |
| 184 | /* enter phy low-power mode again */ |
| 185 | if (ehci->has_hostpc) { |
| 186 | port = HCS_N_PORTS(ehci->hcs_params); |
| 187 | while (port--) { |
| 188 | u32 __iomem *hostpc_reg; |
| 189 | |
| 190 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs |
| 191 | + HOSTPC0 + 4 * port); |
| 192 | temp = ehci_readl(ehci, hostpc_reg); |
| 193 | ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); |
| 194 | } |
| 195 | } |
Alan Stern | ee0b9be | 2010-06-25 14:02:24 -0400 | [diff] [blame] | 196 | |
| 197 | /* Does the root hub have a port wakeup pending? */ |
Matthew Garrett | 294d95f | 2011-01-11 12:26:48 -0500 | [diff] [blame] | 198 | if (!suspending && ehci_port_change(ehci)) |
Alan Stern | ee0b9be | 2010-06-25 14:02:24 -0400 | [diff] [blame] | 199 | usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); |
Yin Kangkai | 148fc55 | 2011-01-28 12:04:35 +0800 | [diff] [blame] | 200 | |
| 201 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 202 | } |
| 203 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 204 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
| 206 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 207 | int port; |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 208 | int mask; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 209 | int changed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
Alan Stern | 8c774fe | 2007-02-01 16:09:59 -0500 | [diff] [blame] | 211 | ehci_dbg(ehci, "suspend root hub\n"); |
| 212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | if (time_before (jiffies, ehci->next_statechange)) |
| 214 | msleep(5); |
Alan Stern | f8fa757 | 2008-01-10 16:43:15 -0500 | [diff] [blame] | 215 | del_timer_sync(&ehci->watchdog); |
| 216 | del_timer_sync(&ehci->iaa_watchdog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | spin_lock_irq (&ehci->lock); |
| 219 | |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 220 | /* Once the controller is stopped, port resumes that are already |
| 221 | * in progress won't complete. Hence if remote wakeup is enabled |
| 222 | * for the root hub and any ports are in the middle of a resume or |
| 223 | * remote wakeup, we must fail the suspend. |
| 224 | */ |
| 225 | if (hcd->self.root_hub->do_remote_wakeup) { |
| 226 | port = HCS_N_PORTS(ehci->hcs_params); |
| 227 | while (port--) { |
| 228 | if (ehci->reset_done[port] != 0) { |
| 229 | spin_unlock_irq(&ehci->lock); |
| 230 | ehci_dbg(ehci, "suspend failed because " |
| 231 | "port %d is resuming\n", |
| 232 | port + 1); |
| 233 | return -EBUSY; |
| 234 | } |
| 235 | } |
| 236 | } |
| 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | /* stop schedules, clean any completed work */ |
| 239 | if (HC_IS_RUNNING(hcd->state)) { |
| 240 | ehci_quiesce (ehci); |
| 241 | hcd->state = HC_STATE_QUIESCING; |
| 242 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 243 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 244 | ehci_work(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 246 | /* Unlike other USB host controller types, EHCI doesn't have |
| 247 | * any notion of "global" or bus-wide suspend. The driver has |
| 248 | * to manually suspend all the active unsuspended ports, and |
| 249 | * then manually resume them in the bus_resume() routine. |
| 250 | */ |
| 251 | ehci->bus_suspended = 0; |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 252 | ehci->owned_ports = 0; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 253 | changed = 0; |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 254 | port = HCS_N_PORTS(ehci->hcs_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | while (port--) { |
| 256 | u32 __iomem *reg = &ehci->regs->port_status [port]; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 257 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 258 | u32 t2 = t1 & ~PORT_WAKE_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 260 | /* keep track of which ports we suspend */ |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 261 | if (t1 & PORT_OWNER) |
| 262 | set_bit(port, &ehci->owned_ports); |
| 263 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | t2 |= PORT_SUSPEND; |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 265 | set_bit(port, &ehci->bus_suspended); |
| 266 | } |
| 267 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 268 | /* enable remote wakeup on all ports, if told to do so */ |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 269 | if (hcd->self.root_hub->do_remote_wakeup) { |
| 270 | /* only enable appropriate wake bits, otherwise the |
| 271 | * hardware can not go phy low power mode. If a race |
| 272 | * condition happens here(connection change during bits |
| 273 | * set), the port change detection will finally fix it. |
| 274 | */ |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 275 | if (t1 & PORT_CONNECT) |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 276 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 277 | else |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 278 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 279 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | if (t1 != t2) { |
| 282 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", |
| 283 | port + 1, t1, t2); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 284 | ehci_writel(ehci, t2, reg); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 285 | changed = 1; |
| 286 | } |
| 287 | } |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 288 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 289 | if (changed && ehci->has_hostpc) { |
| 290 | spin_unlock_irq(&ehci->lock); |
| 291 | msleep(5); /* 5 ms for HCD to enter low-power mode */ |
| 292 | spin_lock_irq(&ehci->lock); |
| 293 | |
| 294 | port = HCS_N_PORTS(ehci->hcs_params); |
| 295 | while (port--) { |
| 296 | u32 __iomem *hostpc_reg; |
| 297 | u32 t3; |
| 298 | |
| 299 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs |
| 300 | + HOSTPC0 + 4 * port); |
| 301 | t3 = ehci_readl(ehci, hostpc_reg); |
| 302 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); |
| 303 | t3 = ehci_readl(ehci, hostpc_reg); |
| 304 | ehci_dbg(ehci, "Port %d phy low-power mode %s\n", |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 305 | port, (t3 & HOSTPC_PHCD) ? |
| 306 | "succeeded" : "failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | } |
| 309 | |
Alan Stern | cd930c9 | 2008-01-10 11:14:53 -0500 | [diff] [blame] | 310 | /* Apparently some devices need a >= 1-uframe delay here */ |
| 311 | if (ehci->bus_suspended) |
| 312 | udelay(150); |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | /* turn off now-idle HC */ |
| 315 | ehci_halt (ehci); |
| 316 | hcd->state = HC_STATE_SUSPENDED; |
| 317 | |
David Brownell | cdc647a | 2008-04-02 13:40:20 -0700 | [diff] [blame] | 318 | if (ehci->reclaim) |
| 319 | end_unlink_async(ehci); |
| 320 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 321 | /* allow remote wakeup */ |
| 322 | mask = INTR_MASK; |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 323 | if (!hcd->self.root_hub->do_remote_wakeup) |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 324 | mask &= ~STS_PCD; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 325 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
| 326 | ehci_readl(ehci, &ehci->regs->intr_enable); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
| 329 | spin_unlock_irq (&ehci->lock); |
Jon Hunter | 015798b | 2009-08-12 11:57:59 -0400 | [diff] [blame] | 330 | |
| 331 | /* ehci_work() may have re-enabled the watchdog timer, which we do not |
| 332 | * want, and so we must delete any pending watchdog timer events. |
| 333 | */ |
| 334 | del_timer_sync(&ehci->watchdog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | |
| 339 | /* caller has locked the root hub, and should reset/reinit on error */ |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 340 | static int ehci_bus_resume (struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | { |
| 342 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 343 | u32 temp; |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 344 | u32 power_okay; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | int i; |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 346 | u8 resume_needed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | if (time_before (jiffies, ehci->next_statechange)) |
| 349 | msleep(5); |
| 350 | spin_lock_irq (&ehci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 351 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 352 | spin_unlock_irq(&ehci->lock); |
| 353 | return -ESHUTDOWN; |
| 354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Jason Wessel | ad45f1d | 2009-08-20 15:39:58 -0500 | [diff] [blame] | 356 | if (unlikely(ehci->debug)) { |
Jason Wessel | 872d359 | 2009-09-23 18:32:44 -0500 | [diff] [blame] | 357 | if (!dbgp_reset_prep()) |
Jason Wessel | ad45f1d | 2009-08-20 15:39:58 -0500 | [diff] [blame] | 358 | ehci->debug = NULL; |
| 359 | else |
| 360 | dbgp_external_startup(); |
| 361 | } |
| 362 | |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 363 | /* Ideally and we've got a real resume here, and no port's power |
| 364 | * was lost. (For PCI, that means Vaux was maintained.) But we |
| 365 | * could instead be restoring a swsusp snapshot -- so that BIOS was |
| 366 | * the last user of the controller, not reset/pm hardware keeping |
| 367 | * state we gave to it. |
| 368 | */ |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 369 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
| 370 | ehci_dbg(ehci, "resume root hub%s\n", |
| 371 | power_okay ? "" : " after power loss"); |
David Brownell | f03c17f | 2005-11-23 15:45:28 -0800 | [diff] [blame] | 372 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 373 | /* at least some APM implementations will try to deliver |
| 374 | * IRQs right away, so delay them until we're ready. |
| 375 | */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 376 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 377 | |
| 378 | /* re-init operational registers */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 379 | ehci_writel(ehci, 0, &ehci->regs->segment); |
| 380 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); |
| 381 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | /* restore CMD_RUN, framelist size, and irq threshold */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 384 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
Alan Stern | e198a31 | 2007-03-15 15:54:30 -0400 | [diff] [blame] | 386 | /* Some controller/firmware combinations need a delay during which |
| 387 | * they set up the port statuses. See Bugzilla #8190. */ |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 388 | spin_unlock_irq(&ehci->lock); |
| 389 | msleep(8); |
| 390 | spin_lock_irq(&ehci->lock); |
Alan Stern | e198a31 | 2007-03-15 15:54:30 -0400 | [diff] [blame] | 391 | |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 392 | /* clear phy low-power mode before resume */ |
| 393 | if (ehci->bus_suspended && ehci->has_hostpc) { |
| 394 | i = HCS_N_PORTS(ehci->hcs_params); |
| 395 | while (i--) { |
| 396 | if (test_bit(i, &ehci->bus_suspended)) { |
| 397 | u32 __iomem *hostpc_reg; |
| 398 | |
| 399 | hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs |
| 400 | + HOSTPC0 + 4 * i); |
| 401 | temp = ehci_readl(ehci, hostpc_reg); |
| 402 | ehci_writel(ehci, temp & ~HOSTPC_PHCD, |
| 403 | hostpc_reg); |
| 404 | } |
| 405 | } |
| 406 | spin_unlock_irq(&ehci->lock); |
| 407 | msleep(5); |
| 408 | spin_lock_irq(&ehci->lock); |
| 409 | } |
| 410 | |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 411 | /* manually resume the ports we suspended during bus_suspend() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | i = HCS_N_PORTS (ehci->hcs_params); |
| 413 | while (i--) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 414 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 415 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 416 | if (test_bit(i, &ehci->bus_suspended) && |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 417 | (temp & PORT_SUSPEND)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | temp |= PORT_RESUME; |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 419 | resume_needed = 1; |
| 420 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 421 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
Vikram Pandita | 3a4e72c | 2008-10-24 23:41:30 +0530 | [diff] [blame] | 423 | |
| 424 | /* msleep for 20ms only if code is trying to resume port */ |
| 425 | if (resume_needed) { |
| 426 | spin_unlock_irq(&ehci->lock); |
| 427 | msleep(20); |
| 428 | spin_lock_irq(&ehci->lock); |
| 429 | } |
| 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | i = HCS_N_PORTS (ehci->hcs_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | while (i--) { |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 433 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 434 | if (test_bit(i, &ehci->bus_suspended) && |
| 435 | (temp & PORT_SUSPEND)) { |
| 436 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 437 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
Alan Stern | 8c03356 | 2006-11-09 14:42:16 -0500 | [diff] [blame] | 438 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
| 439 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 441 | (void) ehci_readl(ehci, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
| 443 | /* maybe re-activate the schedule(s) */ |
| 444 | temp = 0; |
| 445 | if (ehci->async->qh_next.qh) |
| 446 | temp |= CMD_ASE; |
| 447 | if (ehci->periodic_sched) |
| 448 | temp |= CMD_PSE; |
| 449 | if (temp) { |
| 450 | ehci->command |= temp; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 451 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); |
| 455 | hcd->state = HC_STATE_RUNNING; |
| 456 | |
| 457 | /* Now we can safely re-enable irqs */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 458 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | spin_unlock_irq (&ehci->lock); |
Alan Stern | 3bb1af5 | 2008-03-03 15:15:36 -0500 | [diff] [blame] | 461 | ehci_handover_companion_ports(ehci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | return 0; |
| 463 | } |
| 464 | |
| 465 | #else |
| 466 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 467 | #define ehci_bus_suspend NULL |
| 468 | #define ehci_bus_resume NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | #endif /* CONFIG_PM */ |
| 471 | |
| 472 | /*-------------------------------------------------------------------------*/ |
| 473 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 474 | /* |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 475 | * Sets the owner of a port |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 476 | */ |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 477 | 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] | 478 | { |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 479 | u32 __iomem *status_reg; |
| 480 | u32 port_status; |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 481 | int try; |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 482 | |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 483 | status_reg = &ehci->regs->port_status[portnum]; |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 484 | |
| 485 | /* |
| 486 | * The controller won't set the OWNER bit if the port is |
| 487 | * enabled, so this loop will sometimes require at least two |
| 488 | * iterations: one to disable the port and one to set OWNER. |
| 489 | */ |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 490 | for (try = 4; try > 0; --try) { |
| 491 | spin_lock_irq(&ehci->lock); |
| 492 | port_status = ehci_readl(ehci, status_reg); |
| 493 | if ((port_status & PORT_OWNER) == new_owner |
| 494 | || (port_status & (PORT_OWNER | PORT_CONNECT)) |
| 495 | == 0) |
| 496 | try = 0; |
| 497 | else { |
| 498 | port_status ^= PORT_OWNER; |
| 499 | port_status &= ~(PORT_PE | PORT_RWC_BITS); |
| 500 | ehci_writel(ehci, port_status, status_reg); |
| 501 | } |
| 502 | spin_unlock_irq(&ehci->lock); |
| 503 | if (try > 1) |
| 504 | msleep(5); |
| 505 | } |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 506 | } |
| 507 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 508 | /*-------------------------------------------------------------------------*/ |
| 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | static int check_reset_complete ( |
| 511 | struct ehci_hcd *ehci, |
| 512 | int index, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 513 | u32 __iomem *status_reg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | int port_status |
| 515 | ) { |
David Brownell | cd4cdc9 | 2008-01-24 12:39:43 -0800 | [diff] [blame] | 516 | if (!(port_status & PORT_CONNECT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | return port_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | /* if reset finished and it's still not enabled -- handoff */ |
| 520 | if (!(port_status & PORT_PE)) { |
| 521 | |
| 522 | /* with integrated TT, there's nobody to hand it to! */ |
| 523 | if (ehci_is_TDI(ehci)) { |
| 524 | ehci_dbg (ehci, |
| 525 | "Failed to enable port %d on root hub TT\n", |
| 526 | index+1); |
| 527 | return port_status; |
| 528 | } |
| 529 | |
| 530 | ehci_dbg (ehci, "port %d full speed --> companion\n", |
| 531 | index + 1); |
| 532 | |
| 533 | // what happens if HCS_N_CC(params) == 0 ? |
| 534 | port_status |= PORT_OWNER; |
David Brownell | 10f6524 | 2005-08-31 10:55:38 -0700 | [diff] [blame] | 535 | port_status &= ~PORT_RWC_BITS; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 536 | ehci_writel(ehci, port_status, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Vitaly Bordug | 796bcae | 2008-11-09 19:43:30 +0100 | [diff] [blame] | 538 | /* ensure 440EPX ohci controller state is operational */ |
| 539 | if (ehci->has_amcc_usb23) |
| 540 | set_ohci_hcfs(ehci, 1); |
| 541 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
Vitaly Bordug | 796bcae | 2008-11-09 19:43:30 +0100 | [diff] [blame] | 543 | /* ensure 440EPx ohci controller state is suspended */ |
| 544 | if (ehci->has_amcc_usb23) |
| 545 | set_ohci_hcfs(ehci, 0); |
| 546 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | return port_status; |
| 549 | } |
| 550 | |
| 551 | /*-------------------------------------------------------------------------*/ |
| 552 | |
| 553 | |
| 554 | /* build "status change" packet (one or two bytes) from HC registers */ |
| 555 | |
| 556 | static int |
| 557 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) |
| 558 | { |
| 559 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 560 | u32 temp, status = 0; |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 561 | u32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | int ports, i, retval = 1; |
| 563 | unsigned long flags; |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 564 | u32 ppcd = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
| 566 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ |
| 567 | if (!HC_IS_RUNNING(hcd->state)) |
| 568 | return 0; |
| 569 | |
| 570 | /* init status to no-changes */ |
| 571 | buf [0] = 0; |
| 572 | ports = HCS_N_PORTS (ehci->hcs_params); |
| 573 | if (ports > 7) { |
| 574 | buf [1] = 0; |
| 575 | retval++; |
| 576 | } |
David Brownell | 53bd6a6 | 2006-08-30 14:50:06 -0700 | [diff] [blame] | 577 | |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 578 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
| 579 | * causing massive log spam unless we completely ignore them. It |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 580 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
David Brownell | 93f1a47 | 2006-11-16 23:34:58 -0800 | [diff] [blame] | 581 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
| 582 | * PORT_POWER; that's surprising, but maybe within-spec. |
| 583 | */ |
| 584 | if (!ignore_oc) |
| 585 | mask = PORT_CSC | PORT_PEC | PORT_OCC; |
| 586 | else |
| 587 | mask = PORT_CSC | PORT_PEC; |
| 588 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND |
| 589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | /* no hub change reports (bit 0) for now (power, ...) */ |
| 591 | |
| 592 | /* port N changes (bit N)? */ |
| 593 | spin_lock_irqsave (&ehci->lock, flags); |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 594 | |
| 595 | /* get per-port change detect bits */ |
| 596 | if (ehci->has_ppcd) |
| 597 | ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | for (i = 0; i < ports; i++) { |
Alek Du | 5a9cdf3 | 2010-06-04 15:47:56 +0800 | [diff] [blame] | 600 | /* leverage per-port change bits feature */ |
| 601 | if (ehci->has_ppcd && !(ppcd & (1 << i))) |
| 602 | continue; |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 603 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 604 | |
| 605 | /* |
| 606 | * Return status information even for ports with OWNER set. |
| 607 | * Otherwise khubd wouldn't see the disconnect event when a |
| 608 | * high-speed device is switched over to the companion |
| 609 | * controller by the user. |
| 610 | */ |
| 611 | |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 612 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
| 613 | || (ehci->reset_done[i] && time_after_eq( |
| 614 | jiffies, ehci->reset_done[i]))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | if (i < 7) |
| 616 | buf [0] |= 1 << (i + 1); |
| 617 | else |
| 618 | buf [1] |= 1 << (i - 7); |
| 619 | status = STS_PCD; |
| 620 | } |
| 621 | } |
| 622 | /* FIXME autosuspend idle root hubs */ |
| 623 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 624 | return status ? retval : 0; |
| 625 | } |
| 626 | |
| 627 | /*-------------------------------------------------------------------------*/ |
| 628 | |
| 629 | static void |
| 630 | ehci_hub_descriptor ( |
| 631 | struct ehci_hcd *ehci, |
| 632 | struct usb_hub_descriptor *desc |
| 633 | ) { |
| 634 | int ports = HCS_N_PORTS (ehci->hcs_params); |
| 635 | u16 temp; |
| 636 | |
| 637 | desc->bDescriptorType = 0x29; |
| 638 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ |
| 639 | desc->bHubContrCurrent = 0; |
| 640 | |
| 641 | desc->bNbrPorts = ports; |
| 642 | temp = 1 + (ports / 8); |
| 643 | desc->bDescLength = 7 + 2 * temp; |
| 644 | |
| 645 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
John Youn | dbe79bb | 2001-09-17 00:00:00 -0700 | [diff] [blame] | 646 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
| 647 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | temp = 0x0008; /* per-port overcurrent reporting */ |
| 650 | if (HCS_PPC (ehci->hcs_params)) |
| 651 | temp |= 0x0001; /* per-port power control */ |
David Brownell | 56c1e26 | 2005-04-09 09:00:29 -0700 | [diff] [blame] | 652 | else |
| 653 | temp |= 0x0002; /* no power switching */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | #if 0 |
| 655 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. |
| 656 | if (HCS_INDICATOR (ehci->hcs_params)) |
| 657 | temp |= 0x0080; /* per-port indicators (LEDs) */ |
| 658 | #endif |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 659 | desc->wHubCharacteristics = cpu_to_le16(temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | /*-------------------------------------------------------------------------*/ |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | static int ehci_hub_control ( |
| 665 | struct usb_hcd *hcd, |
| 666 | u16 typeReq, |
| 667 | u16 wValue, |
| 668 | u16 wIndex, |
| 669 | char *buf, |
| 670 | u16 wLength |
| 671 | ) { |
| 672 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); |
| 673 | int ports = HCS_N_PORTS (ehci->hcs_params); |
Alan Stern | 383975d | 2007-05-04 11:52:40 -0400 | [diff] [blame] | 674 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
| 675 | (wIndex & 0xff) - 1]; |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 676 | u32 __iomem *hostpc_reg = NULL; |
| 677 | u32 temp, temp1, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | unsigned long flags; |
| 679 | int retval = 0; |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 680 | unsigned selector; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
| 682 | /* |
| 683 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. |
| 684 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. |
| 685 | * (track current state ourselves) ... blink for diagnostics, |
| 686 | * power, "this is the one", etc. EHCI spec supports this. |
| 687 | */ |
| 688 | |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 689 | if (ehci->has_hostpc) |
| 690 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs |
| 691 | + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | spin_lock_irqsave (&ehci->lock, flags); |
| 693 | switch (typeReq) { |
| 694 | case ClearHubFeature: |
| 695 | switch (wValue) { |
| 696 | case C_HUB_LOCAL_POWER: |
| 697 | case C_HUB_OVER_CURRENT: |
| 698 | /* no hub-wide feature/status flags */ |
| 699 | break; |
| 700 | default: |
| 701 | goto error; |
| 702 | } |
| 703 | break; |
| 704 | case ClearPortFeature: |
| 705 | if (!wIndex || wIndex > ports) |
| 706 | goto error; |
| 707 | wIndex--; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 708 | temp = ehci_readl(ehci, status_reg); |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 709 | |
| 710 | /* |
| 711 | * Even if OWNER is set, so the port is owned by the |
| 712 | * companion controller, khubd needs to be able to clear |
| 713 | * the port-change status bits (especially |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 714 | * USB_PORT_STAT_C_CONNECTION). |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 715 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | switch (wValue) { |
| 718 | case USB_PORT_FEAT_ENABLE: |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 719 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | break; |
| 721 | case USB_PORT_FEAT_C_ENABLE: |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 722 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 723 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | break; |
| 725 | case USB_PORT_FEAT_SUSPEND: |
| 726 | if (temp & PORT_RESET) |
| 727 | goto error; |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 728 | if (ehci->no_selective_suspend) |
| 729 | break; |
Anatolij Gustschin | 83722bc | 2011-04-18 22:02:00 +0200 | [diff] [blame] | 730 | #ifdef CONFIG_USB_OTG |
| 731 | if ((hcd->self.otg_port == (wIndex + 1)) |
| 732 | && hcd->self.b_hnp_enable) { |
| 733 | otg_start_hnp(ehci->transceiver); |
| 734 | break; |
| 735 | } |
| 736 | #endif |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 737 | if (!(temp & PORT_SUSPEND)) |
| 738 | break; |
| 739 | if ((temp & PORT_PE) == 0) |
| 740 | goto error; |
| 741 | |
| 742 | /* clear phy low-power mode before resume */ |
| 743 | if (hostpc_reg) { |
| 744 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 745 | ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, |
Alek Du | eab80de | 2010-05-10 11:17:49 +0800 | [diff] [blame] | 746 | hostpc_reg); |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 747 | spin_unlock_irqrestore(&ehci->lock, flags); |
| 748 | msleep(5);/* wait to leave low-power mode */ |
| 749 | spin_lock_irqsave(&ehci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
Alan Stern | 16032c4 | 2010-05-12 18:21:35 -0400 | [diff] [blame] | 751 | /* resume signaling for 20 msec */ |
| 752 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
| 753 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); |
| 754 | ehci->reset_done[wIndex] = jiffies |
| 755 | + msecs_to_jiffies(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | break; |
| 757 | case USB_PORT_FEAT_C_SUSPEND: |
Alan Stern | d1f114d | 2008-05-20 16:58:58 -0400 | [diff] [blame] | 758 | clear_bit(wIndex, &ehci->port_c_suspend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | break; |
| 760 | case USB_PORT_FEAT_POWER: |
| 761 | if (HCS_PPC (ehci->hcs_params)) |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 762 | ehci_writel(ehci, |
| 763 | temp & ~(PORT_RWC_BITS | PORT_POWER), |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 764 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | break; |
| 766 | case USB_PORT_FEAT_C_CONNECTION: |
Alek Du | 48f2497 | 2010-06-04 15:47:55 +0800 | [diff] [blame] | 767 | if (ehci->has_lpm) { |
| 768 | /* clear PORTSC bits on disconnect */ |
| 769 | temp &= ~PORT_LPM; |
| 770 | temp &= ~PORT_DEV_ADDR; |
| 771 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 772 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 773 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | break; |
| 775 | case USB_PORT_FEAT_C_OVER_CURRENT: |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 776 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 777 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | break; |
| 779 | case USB_PORT_FEAT_C_RESET: |
| 780 | /* GetPortStatus clears reset */ |
| 781 | break; |
| 782 | default: |
| 783 | goto error; |
| 784 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 785 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | break; |
| 787 | case GetHubDescriptor: |
| 788 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) |
| 789 | buf); |
| 790 | break; |
| 791 | case GetHubStatus: |
| 792 | /* no hub-wide feature/status flags */ |
| 793 | memset (buf, 0, 4); |
| 794 | //cpu_to_le32s ((u32 *) buf); |
| 795 | break; |
| 796 | case GetPortStatus: |
| 797 | if (!wIndex || wIndex > ports) |
| 798 | goto error; |
| 799 | wIndex--; |
| 800 | status = 0; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 801 | temp = ehci_readl(ehci, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
| 803 | // wPortChange bits |
| 804 | if (temp & PORT_CSC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 805 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | if (temp & PORT_PEC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 807 | status |= USB_PORT_STAT_C_ENABLE << 16; |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 808 | |
| 809 | if ((temp & PORT_OCC) && !ignore_oc){ |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 810 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 812 | /* |
| 813 | * Hubs should disable port power on over-current. |
| 814 | * However, not all EHCI implementations do this |
| 815 | * automatically, even if they _do_ support per-port |
| 816 | * power switching; they're allowed to just limit the |
| 817 | * current. khubd will turn the power back on. |
| 818 | */ |
Sergei Shtylyov | 81463c1 | 2011-07-06 23:19:38 +0400 | [diff] [blame] | 819 | if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 820 | ehci_writel(ehci, |
| 821 | temp & ~(PORT_RWC_BITS | PORT_POWER), |
| 822 | status_reg); |
Sergei Shtylyov | 81463c1 | 2011-07-06 23:19:38 +0400 | [diff] [blame] | 823 | temp = ehci_readl(ehci, status_reg); |
Christian Engelmayer | 756aa6b | 2007-05-30 11:04:48 -0700 | [diff] [blame] | 824 | } |
| 825 | } |
| 826 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | /* whoever resumes must GetPortStatus to complete it!! */ |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 828 | if (temp & PORT_RESUME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 830 | /* Remote Wakeup received? */ |
| 831 | if (!ehci->reset_done[wIndex]) { |
| 832 | /* resume signaling for 20 msec */ |
| 833 | ehci->reset_done[wIndex] = jiffies |
| 834 | + msecs_to_jiffies(20); |
| 835 | /* check the port again */ |
| 836 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, |
| 837 | ehci->reset_done[wIndex]); |
| 838 | } |
| 839 | |
| 840 | /* resume completed? */ |
| 841 | else if (time_after_eq(jiffies, |
| 842 | ehci->reset_done[wIndex])) { |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 843 | clear_bit(wIndex, &ehci->suspended_ports); |
Alan Stern | d1f114d | 2008-05-20 16:58:58 -0400 | [diff] [blame] | 844 | set_bit(wIndex, &ehci->port_c_suspend); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 845 | ehci->reset_done[wIndex] = 0; |
| 846 | |
| 847 | /* stop resume signaling */ |
| 848 | temp = ehci_readl(ehci, status_reg); |
| 849 | ehci_writel(ehci, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 850 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
| 851 | status_reg); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 852 | retval = handshake(ehci, status_reg, |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 853 | PORT_RESUME, 0, 2000 /* 2msec */); |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 854 | if (retval != 0) { |
| 855 | ehci_err(ehci, |
| 856 | "port %d resume error %d\n", |
| 857 | wIndex + 1, retval); |
| 858 | goto error; |
| 859 | } |
| 860 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | /* whoever resets must GetPortStatus to complete it!! */ |
| 865 | if ((temp & PORT_RESET) |
Alan Stern | 629e442 | 2007-01-22 16:08:53 -0500 | [diff] [blame] | 866 | && time_after_eq(jiffies, |
| 867 | ehci->reset_done[wIndex])) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 868 | status |= USB_PORT_STAT_C_RESET << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | ehci->reset_done [wIndex] = 0; |
| 870 | |
| 871 | /* force reset to complete */ |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 872 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 873 | status_reg); |
David Brownell | c22fa3a | 2005-06-13 07:15:28 -0700 | [diff] [blame] | 874 | /* REVISIT: some hardware needs 550+ usec to clear |
| 875 | * this bit; seems too long to spin routinely... |
| 876 | */ |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 877 | retval = handshake(ehci, status_reg, |
Dinh Nguyen | 6307e09 | 2010-04-13 11:13:15 -0500 | [diff] [blame] | 878 | PORT_RESET, 0, 1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | if (retval != 0) { |
| 880 | ehci_err (ehci, "port %d reset error %d\n", |
| 881 | wIndex + 1, retval); |
| 882 | goto error; |
| 883 | } |
| 884 | |
| 885 | /* see what we found out */ |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 886 | temp = check_reset_complete (ehci, wIndex, status_reg, |
| 887 | ehci_readl(ehci, status_reg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 890 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
| 891 | ehci->reset_done[wIndex] = 0; |
| 892 | |
Alan Stern | 57e06c1 | 2007-01-16 11:59:45 -0500 | [diff] [blame] | 893 | /* transfer dedicated ports to the companion hc */ |
| 894 | if ((temp & PORT_CONNECT) && |
| 895 | test_bit(wIndex, &ehci->companion_ports)) { |
| 896 | temp &= ~PORT_RWC_BITS; |
| 897 | temp |= PORT_OWNER; |
| 898 | ehci_writel(ehci, temp, status_reg); |
| 899 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); |
| 900 | temp = ehci_readl(ehci, status_reg); |
| 901 | } |
| 902 | |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 903 | /* |
| 904 | * Even if OWNER is set, there's no harm letting khubd |
| 905 | * see the wPortStatus values (they should all be 0 except |
| 906 | * for PORT_POWER anyway). |
| 907 | */ |
| 908 | |
| 909 | if (temp & PORT_CONNECT) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 910 | status |= USB_PORT_STAT_CONNECTION; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 911 | // status may be from integrated TT |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 912 | if (ehci->has_hostpc) { |
| 913 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 914 | status |= ehci_port_speed(ehci, temp1); |
| 915 | } else |
| 916 | status |= ehci_port_speed(ehci, temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 918 | if (temp & PORT_PE) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 919 | status |= USB_PORT_STAT_ENABLE; |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 920 | |
| 921 | /* maybe the port was unsuspended without our knowledge */ |
| 922 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 923 | status |= USB_PORT_STAT_SUSPEND; |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 924 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
| 925 | clear_bit(wIndex, &ehci->suspended_ports); |
| 926 | ehci->reset_done[wIndex] = 0; |
| 927 | if (temp & PORT_PE) |
| 928 | set_bit(wIndex, &ehci->port_c_suspend); |
| 929 | } |
| 930 | |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 931 | if (temp & PORT_OC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 932 | status |= USB_PORT_STAT_OVERCURRENT; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 933 | if (temp & PORT_RESET) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 934 | status |= USB_PORT_STAT_RESET; |
Alan Stern | 625b5c9 | 2007-01-16 11:58:47 -0500 | [diff] [blame] | 935 | if (temp & PORT_POWER) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 936 | status |= USB_PORT_STAT_POWER; |
Alan Stern | d1f114d | 2008-05-20 16:58:58 -0400 | [diff] [blame] | 937 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 938 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
David Brownell | 9776afc | 2008-02-01 11:42:05 -0800 | [diff] [blame] | 940 | #ifndef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
| 942 | #endif |
| 943 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); |
Harvey Harrison | a5abdea | 2008-04-29 01:03:40 -0700 | [diff] [blame] | 944 | put_unaligned_le32(status, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | break; |
| 946 | case SetHubFeature: |
| 947 | switch (wValue) { |
| 948 | case C_HUB_LOCAL_POWER: |
| 949 | case C_HUB_OVER_CURRENT: |
| 950 | /* no hub-wide feature/status flags */ |
| 951 | break; |
| 952 | default: |
| 953 | goto error; |
| 954 | } |
| 955 | break; |
| 956 | case SetPortFeature: |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 957 | selector = wIndex >> 8; |
| 958 | wIndex &= 0xff; |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 959 | if (unlikely(ehci->debug)) { |
| 960 | /* If the debug port is active any port |
| 961 | * feature requests should get denied */ |
| 962 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && |
| 963 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { |
| 964 | retval = -ENODEV; |
| 965 | goto error_exit; |
| 966 | } |
| 967 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | if (!wIndex || wIndex > ports) |
| 969 | goto error; |
| 970 | wIndex--; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 971 | temp = ehci_readl(ehci, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (temp & PORT_OWNER) |
| 973 | break; |
| 974 | |
David Brownell | 10f6524 | 2005-08-31 10:55:38 -0700 | [diff] [blame] | 975 | temp &= ~PORT_RWC_BITS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | switch (wValue) { |
| 977 | case USB_PORT_FEAT_SUSPEND: |
David Brownell | f8aeb3b | 2006-01-20 13:55:14 -0800 | [diff] [blame] | 978 | if (ehci->no_selective_suspend) |
| 979 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | if ((temp & PORT_PE) == 0 |
| 981 | || (temp & PORT_RESET) != 0) |
| 982 | goto error; |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 983 | |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 984 | /* After above check the port must be connected. |
| 985 | * Set appropriate bit thus could put phy into low power |
| 986 | * mode if we have hostpc feature |
| 987 | */ |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 988 | temp &= ~PORT_WKCONN_E; |
| 989 | temp |= PORT_WKDISC_E | PORT_WKOC_E; |
| 990 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 991 | if (hostpc_reg) { |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 992 | spin_unlock_irqrestore(&ehci->lock, flags); |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 993 | msleep(5);/* 5ms for HCD enter low pwr mode */ |
Alek Du | b9df7942 | 2010-01-19 16:31:31 +0800 | [diff] [blame] | 994 | spin_lock_irqsave(&ehci->lock, flags); |
Alek Du | 331ac6b | 2009-07-13 12:41:20 +0800 | [diff] [blame] | 995 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 996 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, |
| 997 | hostpc_reg); |
| 998 | temp1 = ehci_readl(ehci, hostpc_reg); |
| 999 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", |
| 1000 | wIndex, (temp1 & HOSTPC_PHCD) ? |
| 1001 | "succeeded" : "failed"); |
| 1002 | } |
Alan Stern | eafe5b9 | 2008-10-06 11:25:53 -0400 | [diff] [blame] | 1003 | set_bit(wIndex, &ehci->suspended_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | break; |
| 1005 | case USB_PORT_FEAT_POWER: |
| 1006 | if (HCS_PPC (ehci->hcs_params)) |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 1007 | ehci_writel(ehci, temp | PORT_POWER, |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1008 | status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | break; |
| 1010 | case USB_PORT_FEAT_RESET: |
| 1011 | if (temp & PORT_RESUME) |
| 1012 | goto error; |
| 1013 | /* line status bits may report this as low speed, |
| 1014 | * which can be fine if this root hub has a |
| 1015 | * transaction translator built in. |
| 1016 | */ |
| 1017 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT |
| 1018 | && !ehci_is_TDI(ehci) |
| 1019 | && PORT_USB11 (temp)) { |
| 1020 | ehci_dbg (ehci, |
| 1021 | "port %d low speed --> companion\n", |
| 1022 | wIndex + 1); |
| 1023 | temp |= PORT_OWNER; |
| 1024 | } else { |
| 1025 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); |
| 1026 | temp |= PORT_RESET; |
| 1027 | temp &= ~PORT_PE; |
| 1028 | |
| 1029 | /* |
| 1030 | * caller must wait, then call GetPortStatus |
| 1031 | * usb 2.0 spec says 50 ms resets on root |
| 1032 | */ |
| 1033 | ehci->reset_done [wIndex] = jiffies |
| 1034 | + msecs_to_jiffies (50); |
| 1035 | } |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1036 | ehci_writel(ehci, temp, status_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | break; |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1038 | |
| 1039 | /* For downstream facing ports (these): one hub port is put |
| 1040 | * into test mode according to USB2 11.24.2.13, then the hub |
| 1041 | * must be reset (which for root hub now means rmmod+modprobe, |
| 1042 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info |
| 1043 | * about the EHCI-specific stuff. |
| 1044 | */ |
| 1045 | case USB_PORT_FEAT_TEST: |
| 1046 | if (!selector || selector > 5) |
| 1047 | goto error; |
| 1048 | ehci_quiesce(ehci); |
| 1049 | ehci_halt(ehci); |
| 1050 | temp |= selector << 16; |
Alan Stern | e631656 | 2007-01-16 11:58:00 -0500 | [diff] [blame] | 1051 | ehci_writel(ehci, temp, status_reg); |
David Brownell | f0d7f27 | 2006-11-16 23:56:15 -0800 | [diff] [blame] | 1052 | break; |
| 1053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | default: |
| 1055 | goto error; |
| 1056 | } |
Benjamin Herrenschmidt | 083522d | 2006-12-15 06:54:08 +1100 | [diff] [blame] | 1057 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | break; |
| 1059 | |
| 1060 | default: |
| 1061 | error: |
| 1062 | /* "stall" on error */ |
| 1063 | retval = -EPIPE; |
| 1064 | } |
Jason Wessel | 8d053c7 | 2009-08-20 15:39:54 -0500 | [diff] [blame] | 1065 | error_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 1067 | return retval; |
| 1068 | } |
Balaji Rao | 90da096 | 2007-11-22 01:58:14 +0530 | [diff] [blame] | 1069 | |
| 1070 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) |
| 1071 | { |
| 1072 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1073 | |
| 1074 | if (ehci_is_TDI(ehci)) |
| 1075 | return; |
| 1076 | set_owner(ehci, --portnum, PORT_OWNER); |
| 1077 | } |
| 1078 | |
Alan Stern | 3a31155 | 2008-05-20 16:58:29 -0400 | [diff] [blame] | 1079 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
| 1080 | { |
| 1081 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 1082 | u32 __iomem *reg; |
| 1083 | |
| 1084 | if (ehci_is_TDI(ehci)) |
| 1085 | return 0; |
| 1086 | reg = &ehci->regs->port_status[portnum - 1]; |
| 1087 | return ehci_readl(ehci, reg) & PORT_OWNER; |
| 1088 | } |