diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/xhci-dbg.c | 26 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-hcd.c | 3 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 308 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-pci.c | 4 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 43 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 11 |
6 files changed, 390 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c index 6dbf7d8..570cd48 100644 --- a/drivers/usb/host/xhci-dbg.c +++ b/drivers/usb/host/xhci-dbg.c @@ -152,6 +152,31 @@ void xhci_print_op_regs(struct xhci_hcd *xhci) xhci_print_status(xhci); } +void xhci_print_ports(struct xhci_hcd *xhci) +{ + u32 __iomem *addr; + int i, j; + int ports; + char *names[NUM_PORT_REGS] = { + "status", + "power", + "link", + "reserved", + }; + + ports = HCS_MAX_PORTS(xhci->hcs_params1); + addr = &xhci->op_regs->port_status_base; + for (i = 0; i < ports; i++) { + for (j = 0; j < NUM_PORT_REGS; ++j) { + xhci_dbg(xhci, "0x%x port %s reg = 0x%x\n", + (unsigned int) addr, + names[j], + (unsigned int) xhci_readl(xhci, addr)); + addr++; + } + } +} + void xhci_print_ir_set(struct xhci_hcd *xhci, struct intr_reg *ir_set, int set_num) { void *addr; @@ -228,6 +253,7 @@ void xhci_print_registers(struct xhci_hcd *xhci) { xhci_print_cap_regs(xhci); xhci_print_op_regs(xhci); + xhci_print_ports(xhci); } void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb) diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c index a99c119..d7c2fed 100644 --- a/drivers/usb/host/xhci-hcd.c +++ b/drivers/usb/host/xhci-hcd.c @@ -349,6 +349,9 @@ int xhci_run(struct usb_hcd *hcd) struct xhci_hcd *xhci = hcd_to_xhci(hcd); void (*doorbell)(struct xhci_hcd *) = NULL; + hcd->uses_new_polling = 1; + hcd->poll_rh = 0; + xhci_dbg(xhci, "xhci_run\n"); #if 0 /* FIXME: MSI not setup yet */ /* Do this at the very last minute */ diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c new file mode 100644 index 0000000..eac5b53 --- /dev/null +++ b/drivers/usb/host/xhci-hub.c @@ -0,0 +1,308 @@ +/* + * xHCI host controller driver + * + * Copyright (C) 2008 Intel Corp. + * + * Author: Sarah Sharp + * Some code borrowed from the Linux EHCI driver. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <asm/unaligned.h> + +#include "xhci.h" + +static void xhci_hub_descriptor(struct xhci_hcd *xhci, + struct usb_hub_descriptor *desc) +{ + int ports; + u16 temp; + + ports = HCS_MAX_PORTS(xhci->hcs_params1); + + /* USB 3.0 hubs have a different descriptor, but we fake this for now */ + desc->bDescriptorType = 0x29; + desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */ + desc->bHubContrCurrent = 0; + + desc->bNbrPorts = ports; + temp = 1 + (ports / 8); + desc->bDescLength = 7 + 2 * temp; + + /* Why does core/hcd.h define bitmap? It's just confusing. */ + memset(&desc->DeviceRemovable[0], 0, temp); + memset(&desc->DeviceRemovable[temp], 0xff, temp); + + /* Ugh, these should be #defines, FIXME */ + /* Using table 11-13 in USB 2.0 spec. */ + temp = 0; + /* Bits 1:0 - support port power switching, or power always on */ + if (HCC_PPC(xhci->hcc_params)) + temp |= 0x0001; + else + temp |= 0x0002; + /* Bit 2 - root hubs are not part of a compound device */ + /* Bits 4:3 - individual port over current protection */ + temp |= 0x0008; + /* Bits 6:5 - no TTs in root ports */ + /* Bit 7 - no port indicators */ + desc->wHubCharacteristics = (__force __u16) cpu_to_le16(temp); +} + +static unsigned int xhci_port_speed(unsigned int port_status) +{ + if (DEV_LOWSPEED(port_status)) + return 1 << USB_PORT_FEAT_LOWSPEED; + if (DEV_HIGHSPEED(port_status)) + return 1 << USB_PORT_FEAT_HIGHSPEED; + if (DEV_SUPERSPEED(port_status)) + return 1 << USB_PORT_FEAT_SUPERSPEED; + /* + * FIXME: Yes, we should check for full speed, but the core uses that as + * a default in portspeed() in usb/core/hub.c (which is the only place + * USB_PORT_FEAT_*SPEED is used). + */ + return 0; +} + +/* + * These bits are Read Only (RO) and should be saved and written to the + * registers: 0, 3, 10:13, 30 + * connect status, over-current status, port speed, and device removable. + * connect status and port speed are also sticky - meaning they're in + * the AUX well and they aren't changed by a hot, warm, or cold reset. + */ +#define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30)) +/* + * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: + * bits 5:8, 9, 14:15, 25:27 + * link state, port power, port indicator state, "wake on" enable state + */ +#define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25)) +/* + * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: + * bit 4 (port reset) + */ +#define XHCI_PORT_RW1S ((1<<4)) +/* + * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: + * bits 1, 17, 18, 19, 20, 21, 22, 23 + * port enable/disable, and + * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports), + * over-current, reset, link state, and L1 change + */ +#define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17)) +/* + * Bit 16 is RW, and writing a '1' to it causes the link state control to be + * latched in + */ +#define XHCI_PORT_RW ((1<<16)) +/* + * These bits are Reserved Zero (RsvdZ) and zero should be written to them: + * bits 2, 24, 28:31 + */ +#define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28)) + +/* + * Given a port state, this function returns a value that would result in the + * port being in the same state, if the value was written to the port status + * control register. + * Save Read Only (RO) bits and save read/write bits where + * writing a 0 clears the bit and writing a 1 sets the bit (RWS). + * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. + */ +static u32 xhci_port_state_to_neutral(u32 state) +{ + /* Save read-only status and port state */ + return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); +} + +int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + int ports; + unsigned long flags; + u32 temp, status; + int retval = 0; + u32 __iomem *addr; + char *port_change_bit; + + ports = HCS_MAX_PORTS(xhci->hcs_params1); + + spin_lock_irqsave(&xhci->lock, flags); + switch (typeReq) { + case GetHubStatus: + /* No power source, over-current reported per port */ + memset(buf, 0, 4); + break; + case GetHubDescriptor: + xhci_hub_descriptor(xhci, (struct usb_hub_descriptor *) buf); + break; + case GetPortStatus: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + status = 0; + addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff); + temp = xhci_readl(xhci, addr); + xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n", wIndex, temp); + + /* wPortChange bits */ + if (temp & PORT_CSC) + status |= 1 << USB_PORT_FEAT_C_CONNECTION; + if (temp & PORT_PEC) + status |= 1 << USB_PORT_FEAT_C_ENABLE; + if ((temp & PORT_OCC)) + status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; + /* + * FIXME ignoring suspend, reset, and USB 2.1/3.0 specific + * changes + */ + if (temp & PORT_CONNECT) { + status |= 1 << USB_PORT_FEAT_CONNECTION; + status |= xhci_port_speed(temp); + } + if (temp & PORT_PE) + status |= 1 << USB_PORT_FEAT_ENABLE; + if (temp & PORT_OC) + status |= 1 << USB_PORT_FEAT_OVER_CURRENT; + if (temp & PORT_RESET) + status |= 1 << USB_PORT_FEAT_RESET; + if (temp & PORT_POWER) + status |= 1 << USB_PORT_FEAT_POWER; + xhci_dbg(xhci, "Get port status returned 0x%x\n", status); + put_unaligned(cpu_to_le32(status), (__le32 *) buf); + break; + case SetPortFeature: + wIndex &= 0xff; + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff); + temp = xhci_readl(xhci, addr); + temp = xhci_port_state_to_neutral(temp); + switch (wValue) { + case USB_PORT_FEAT_POWER: + /* + * Turn on ports, even if there isn't per-port switching. + * HC will report connect events even before this is set. + * However, khubd will ignore the roothub events until + * the roothub is registered. + */ + xhci_writel(xhci, temp | PORT_POWER, addr); + + temp = xhci_readl(xhci, addr); + xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp); + break; + case USB_PORT_FEAT_RESET: + temp = (temp | PORT_RESET); + xhci_writel(xhci, temp, addr); + + temp = xhci_readl(xhci, addr); + xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); + break; + default: + goto error; + } + temp = xhci_readl(xhci, addr); /* unblock any posted writes */ + break; + case ClearPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + addr = &xhci->op_regs->port_status_base + + NUM_PORT_REGS*(wIndex & 0xff); + temp = xhci_readl(xhci, addr); + temp = xhci_port_state_to_neutral(temp); + switch (wValue) { + case USB_PORT_FEAT_C_RESET: + status = PORT_RC; + port_change_bit = "reset"; + break; + case USB_PORT_FEAT_C_CONNECTION: + status = PORT_CSC; + port_change_bit = "connect"; + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + status = PORT_OCC; + port_change_bit = "over-current"; + break; + default: + goto error; + } + /* Change bits are all write 1 to clear */ + xhci_writel(xhci, temp | status, addr); + temp = xhci_readl(xhci, addr); + xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n", + port_change_bit, wIndex, temp); + temp = xhci_readl(xhci, addr); /* unblock any posted writes */ + break; + default: +error: + /* "stall" on error */ + retval = -EPIPE; + } + spin_unlock_irqrestore(&xhci->lock, flags); + return retval; +} + +/* + * Returns 0 if the status hasn't changed, or the number of bytes in buf. + * Ports are 0-indexed from the HCD point of view, + * and 1-indexed from the USB core pointer of view. + * xHCI instances can have up to 127 ports, so FIXME if you see more than 15. + * + * Note that the status change bits will be cleared as soon as a port status + * change event is generated, so we use the saved status from that event. + */ +int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + unsigned long flags; + u32 temp, status; + int i, retval; + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + int ports; + u32 __iomem *addr; + + ports = HCS_MAX_PORTS(xhci->hcs_params1); + + /* Initial status is no changes */ + buf[0] = 0; + status = 0; + if (ports > 7) { + buf[1] = 0; + retval = 2; + } else { + retval = 1; + } + + spin_lock_irqsave(&xhci->lock, flags); + /* For each port, did anything change? If so, set that bit in buf. */ + for (i = 0; i < ports; i++) { + addr = &xhci->op_regs->port_status_base + + NUM_PORT_REGS*i; + temp = xhci_readl(xhci, addr); + if (temp & (PORT_CSC | PORT_PEC | PORT_OCC)) { + if (i < 7) + buf[0] |= 1 << (i + 1); + else + buf[1] |= 1 << (i - 7); + status = 1; + } + } + spin_unlock_irqrestore(&xhci->lock, flags); + return status ? retval : 0; +} diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 89614af..005c5b2 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -113,7 +113,9 @@ static const struct hc_driver xhci_pci_hc_driver = { */ .get_frame_number = xhci_get_frame, - /* Implement root hub support later. */ + /* Root hub support */ + .hub_control = xhci_hub_control, + .hub_status_data = xhci_hub_status_data, }; /*-------------------------------------------------------------------------*/ diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index c7e3c71..9d6bb3d 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -284,9 +284,38 @@ static void handle_cmd_completion(struct xhci_hcd *xhci, inc_deq(xhci, xhci->cmd_ring, false); } +static void handle_port_status(struct xhci_hcd *xhci, + union xhci_trb *event) +{ + u32 port_id; + + /* Port status change events always have a successful completion code */ + if (GET_COMP_CODE(event->generic.field[2]) != COMP_SUCCESS) { + xhci_warn(xhci, "WARN: xHC returned failed port status event\n"); + xhci->error_bitmask |= 1 << 8; + } + /* FIXME: core doesn't care about all port link state changes yet */ + port_id = GET_PORT_ID(event->generic.field[0]); + xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id); + + /* Update event ring dequeue pointer before dropping the lock */ + inc_deq(xhci, xhci->event_ring, true); + set_hc_event_deq(xhci); + + spin_unlock(&xhci->lock); + /* Pass this up to the core */ + usb_hcd_poll_rh_status(xhci_to_hcd(xhci)); + spin_lock(&xhci->lock); +} + +/* + * This function handles all OS-owned events on the event ring. It may drop + * xhci->lock between event processing (e.g. to pass up port status changes). + */ void handle_event(struct xhci_hcd *xhci) { union xhci_trb *event; + int update_ptrs = 1; if (!xhci->event_ring || !xhci->event_ring->dequeue) { xhci->error_bitmask |= 1 << 1; @@ -301,18 +330,24 @@ void handle_event(struct xhci_hcd *xhci) return; } - /* FIXME: Only handles command completion events. */ + /* FIXME: Handle more event types. */ switch ((event->event_cmd.flags & TRB_TYPE_BITMASK)) { case TRB_TYPE(TRB_COMPLETION): handle_cmd_completion(xhci, &event->event_cmd); break; + case TRB_TYPE(TRB_PORT_STATUS): + handle_port_status(xhci, event); + update_ptrs = 0; + break; default: xhci->error_bitmask |= 1 << 3; } - /* Update SW and HC event ring dequeue pointer */ - inc_deq(xhci, xhci->event_ring, true); - set_hc_event_deq(xhci); + if (update_ptrs) { + /* Update SW and HC event ring dequeue pointer */ + inc_deq(xhci, xhci->event_ring, true); + set_hc_event_deq(xhci); + } /* Are there more items on the event ring? */ handle_event(xhci); } diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 66be134..059c659 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -35,6 +35,8 @@ /* Max number of USB devices for any host controller - limit in section 6.1 */ #define MAX_HC_SLOTS 256 +/* Section 5.3.3 - MaxPorts */ +#define MAX_HC_PORTS 127 /* * xHCI register interface. @@ -710,6 +712,10 @@ struct xhci_event_cmd { } __attribute__ ((packed)); +/* Port Status Change Event TRB fields */ +/* Port ID - bits 31:24 */ +#define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24) + /* Normal TRB fields */ /* transfer_len bitmasks - bits 0:16 */ #define TRB_LEN(p) ((p) & 0x1ffff) @@ -1024,4 +1030,9 @@ void *setup_one_noop(struct xhci_hcd *xhci); void handle_event(struct xhci_hcd *xhci); void set_hc_event_deq(struct xhci_hcd *xhci); +/* xHCI roothub code */ +int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, + char *buf, u16 wLength); +int xhci_hub_status_data(struct usb_hcd *hcd, char *buf); + #endif /* __LINUX_XHCI_HCD_H */ |