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path: root/drivers/usb/host/ehci-hcd.c
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Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
-rw-r--r--drivers/usb/host/ehci-hcd.c99
1 files changed, 57 insertions, 42 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index d9d53f289ca..4725d15d096 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -24,6 +24,7 @@
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/vmalloc.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
@@ -59,7 +60,6 @@
* providing early devices for those host controllers to talk to!
*/
-#define DRIVER_VERSION "10 Dec 2004"
#define DRIVER_AUTHOR "David Brownell"
#define DRIVER_DESC "USB 2.0 'Enhanced' Host Controller (EHCI) Driver"
@@ -145,16 +145,6 @@ static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
return -ETIMEDOUT;
}
-static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
- u32 mask, u32 done, int usec)
-{
- int error = handshake(ehci, ptr, mask, done, usec);
- if (error)
- ehci_to_hcd(ehci)->state = HC_STATE_HALT;
-
- return error;
-}
-
/* force HC to halt state from unknown (EHCI spec section 2.3) */
static int ehci_halt (struct ehci_hcd *ehci)
{
@@ -173,6 +163,22 @@ static int ehci_halt (struct ehci_hcd *ehci)
STS_HALT, STS_HALT, 16 * 125);
}
+static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
+ u32 mask, u32 done, int usec)
+{
+ int error;
+
+ error = handshake(ehci, ptr, mask, done, usec);
+ if (error) {
+ ehci_halt(ehci);
+ ehci_to_hcd(ehci)->state = HC_STATE_HALT;
+ ehci_err(ehci, "force halt; handhake %p %08x %08x -> %d\n",
+ ptr, mask, done, error);
+ }
+
+ return error;
+}
+
/* put TDI/ARC silicon into EHCI mode */
static void tdi_reset (struct ehci_hcd *ehci)
{
@@ -614,9 +620,9 @@ static int ehci_run (struct usb_hcd *hcd)
temp = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
ehci_info (ehci,
- "USB %x.%x started, EHCI %x.%02x, driver %s%s\n",
+ "USB %x.%x started, EHCI %x.%02x%s\n",
((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
- temp >> 8, temp & 0xff, DRIVER_VERSION,
+ temp >> 8, temp & 0xff,
ignore_oc ? ", overcurrent ignored" : "");
ehci_writel(ehci, INTR_MASK,
@@ -637,7 +643,7 @@ static int ehci_run (struct usb_hcd *hcd)
static irqreturn_t ehci_irq (struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
- u32 status, pcd_status = 0, cmd;
+ u32 status, masked_status, pcd_status = 0, cmd;
int bh;
spin_lock (&ehci->lock);
@@ -650,14 +656,14 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
goto dead;
}
- status &= INTR_MASK;
- if (!status) { /* irq sharing? */
+ masked_status = status & INTR_MASK;
+ if (!masked_status) { /* irq sharing? */
spin_unlock(&ehci->lock);
return IRQ_NONE;
}
/* clear (just) interrupts */
- ehci_writel(ehci, status, &ehci->regs->status);
+ ehci_writel(ehci, masked_status, &ehci->regs->status);
cmd = ehci_readl(ehci, &ehci->regs->command);
bh = 0;
@@ -700,7 +706,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
pcd_status = status;
/* resume root hub? */
- if (!(ehci_readl(ehci, &ehci->regs->command) & CMD_RUN))
+ if (!(cmd & CMD_RUN))
usb_hcd_resume_root_hub(hcd);
while (i--) {
@@ -709,8 +715,11 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
if (pstatus & PORT_OWNER)
continue;
- if (!(pstatus & PORT_RESUME)
- || ehci->reset_done [i] != 0)
+ if (!(test_bit(i, &ehci->suspended_ports) &&
+ ((pstatus & PORT_RESUME) ||
+ !(pstatus & PORT_SUSPEND)) &&
+ (pstatus & PORT_PE) &&
+ ehci->reset_done[i] == 0))
continue;
/* start 20 msec resume signaling from this port,
@@ -725,19 +734,17 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
/* PCI errors [4.15.2.4] */
if (unlikely ((status & STS_FATAL) != 0)) {
- dbg_cmd (ehci, "fatal", ehci_readl(ehci,
- &ehci->regs->command));
- dbg_status (ehci, "fatal", status);
- if (status & STS_HALT) {
- ehci_err (ehci, "fatal error\n");
+ ehci_err(ehci, "fatal error\n");
+ dbg_cmd(ehci, "fatal", cmd);
+ dbg_status(ehci, "fatal", status);
+ ehci_halt(ehci);
dead:
- ehci_reset (ehci);
- ehci_writel(ehci, 0, &ehci->regs->configured_flag);
- /* generic layer kills/unlinks all urbs, then
- * uses ehci_stop to clean up the rest
- */
- bh = 1;
- }
+ ehci_reset(ehci);
+ ehci_writel(ehci, 0, &ehci->regs->configured_flag);
+ /* generic layer kills/unlinks all urbs, then
+ * uses ehci_stop to clean up the rest
+ */
+ bh = 1;
}
if (bh)
@@ -988,9 +995,7 @@ static int ehci_get_frame (struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/
-#define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC
-
-MODULE_DESCRIPTION (DRIVER_INFO);
+MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR (DRIVER_AUTHOR);
MODULE_LICENSE ("GPL");
@@ -1014,11 +1019,6 @@ MODULE_LICENSE ("GPL");
#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
#endif
-#if defined(CONFIG_440EPX) && !defined(CONFIG_PPC_MERGE)
-#include "ehci-ppc-soc.c"
-#define PLATFORM_DRIVER ehci_ppc_soc_driver
-#endif
-
#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
#include "ehci-ppc-of.c"
#define OF_PLATFORM_DRIVER ehci_hcd_ppc_of_driver
@@ -1043,6 +1043,16 @@ static int __init ehci_hcd_init(void)
{
int retval = 0;
+ if (usb_disabled())
+ return -ENODEV;
+
+ printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
+ set_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
+ if (test_bit(USB_UHCI_LOADED, &usb_hcds_loaded) ||
+ test_bit(USB_OHCI_LOADED, &usb_hcds_loaded))
+ printk(KERN_WARNING "Warning! ehci_hcd should always be loaded"
+ " before uhci_hcd and ohci_hcd, not after\n");
+
pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
hcd_name,
sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
@@ -1050,8 +1060,10 @@ static int __init ehci_hcd_init(void)
#ifdef DEBUG
ehci_debug_root = debugfs_create_dir("ehci", NULL);
- if (!ehci_debug_root)
- return -ENOENT;
+ if (!ehci_debug_root) {
+ retval = -ENOENT;
+ goto err_debug;
+ }
#endif
#ifdef PLATFORM_DRIVER
@@ -1098,7 +1110,9 @@ clean0:
#ifdef DEBUG
debugfs_remove(ehci_debug_root);
ehci_debug_root = NULL;
+err_debug:
#endif
+ clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
return retval;
}
module_init(ehci_hcd_init);
@@ -1120,6 +1134,7 @@ static void __exit ehci_hcd_cleanup(void)
#ifdef DEBUG
debugfs_remove(ehci_debug_root);
#endif
+ clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
}
module_exit(ehci_hcd_cleanup);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-13 07:50:49 +0000