diff options
Diffstat (limited to 'drivers/usb/host/ohci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ohci-hcd.c | 95 |
1 files changed, 48 insertions, 47 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index a66637e725f3..6edf4097d2d2 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -35,15 +35,13 @@ #include <linux/dma-mapping.h> #include <linux/dmapool.h> #include <linux/reboot.h> +#include <linux/workqueue.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/system.h> #include <asm/unaligned.h> #include <asm/byteorder.h> -#ifdef CONFIG_PPC_PS3 -#include <asm/firmware.h> -#endif #include "../core/hcd.h" @@ -82,6 +80,8 @@ static const char hcd_name [] = "ohci_hcd"; static void ohci_dump (struct ohci_hcd *ohci, int verbose); static int ohci_init (struct ohci_hcd *ohci); static void ohci_stop (struct usb_hcd *hcd); +static int ohci_restart (struct ohci_hcd *ohci); +static void ohci_quirk_nec_worker (struct work_struct *work); #include "ohci-hub.c" #include "ohci-dbg.c" @@ -171,11 +171,10 @@ static int ohci_urb_enqueue ( } /* allocate the private part of the URB */ - urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (struct td *), + urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *), mem_flags); if (!urb_priv) return -ENOMEM; - memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (struct td *)); INIT_LIST_HEAD (&urb_priv->pending); urb_priv->length = size; urb_priv->ed = ed; @@ -510,15 +509,7 @@ static int ohci_run (struct ohci_hcd *ohci) // flush the writes (void) ohci_readl (ohci, &ohci->regs->control); msleep(temp); - temp = roothub_a (ohci); - if (!(temp & RH_A_NPS)) { - /* power down each port */ - for (temp = 0; temp < ohci->num_ports; temp++) - ohci_writel (ohci, RH_PS_LSDA, - &ohci->regs->roothub.portstatus [temp]); - } - // flush those writes - (void) ohci_readl (ohci, &ohci->regs->control); + memset (ohci->hcca, 0, sizeof (struct ohci_hcca)); /* 2msec timelimit here means no irqs/preempt */ @@ -659,9 +650,20 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd) } if (ints & OHCI_INTR_UE) { - disable (ohci); - ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n"); // e.g. due to PCI Master/Target Abort + if (ohci->flags & OHCI_QUIRK_NEC) { + /* Workaround for a silicon bug in some NEC chips used + * in Apple's PowerBooks. Adapted from Darwin code. + */ + ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n"); + + ohci_writel (ohci, OHCI_INTR_UE, ®s->intrdisable); + + schedule_work (&ohci->nec_work); + } else { + disable (ohci); + ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n"); + } ohci_dump (ohci, 1); ohci_usb_reset (ohci); @@ -763,23 +765,16 @@ static void ohci_stop (struct usb_hcd *hcd) /*-------------------------------------------------------------------------*/ /* must not be called from interrupt context */ - -#ifdef CONFIG_PM - static int ohci_restart (struct ohci_hcd *ohci) { int temp; int i; struct urb_priv *priv; - /* mark any devices gone, so they do nothing till khubd disconnects. - * recycle any "live" eds/tds (and urbs) right away. - * later, khubd disconnect processing will recycle the other state, - * (either as disconnect/reconnect, or maybe someday as a reset). - */ spin_lock_irq(&ohci->lock); disable (ohci); - usb_root_hub_lost_power(ohci_to_hcd(ohci)->self.root_hub); + + /* Recycle any "live" eds/tds (and urbs). */ if (!list_empty (&ohci->pending)) ohci_dbg(ohci, "abort schedule...\n"); list_for_each_entry (priv, &ohci->pending, pending) { @@ -826,20 +821,31 @@ static int ohci_restart (struct ohci_hcd *ohci) if ((temp = ohci_run (ohci)) < 0) { ohci_err (ohci, "can't restart, %d\n", temp); return temp; - } else { - /* here we "know" root ports should always stay powered, - * and that if we try to turn them back on the root hub - * will respond to CSC processing. - */ - i = ohci->num_ports; - while (i--) - ohci_writel (ohci, RH_PS_PSS, - &ohci->regs->roothub.portstatus [i]); - ohci_dbg (ohci, "restart complete\n"); } + ohci_dbg(ohci, "restart complete\n"); return 0; } -#endif + +/*-------------------------------------------------------------------------*/ + +/* NEC workaround */ +static void ohci_quirk_nec_worker(struct work_struct *work) +{ + struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work); + int status; + + status = ohci_init(ohci); + if (status != 0) { + ohci_err(ohci, "Restarting NEC controller failed " + "in ohci_init, %d\n", status); + return; + } + + status = ohci_restart(ohci); + if (status != 0) + ohci_err(ohci, "Restarting NEC controller failed " + "in ohci_restart, %d\n", status); +} /*-------------------------------------------------------------------------*/ @@ -917,7 +923,7 @@ MODULE_LICENSE ("GPL"); #ifdef CONFIG_PPC_PS3 #include "ohci-ps3.c" -#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_sb_driver +#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver #endif #if !defined(PCI_DRIVER) && \ @@ -940,12 +946,9 @@ static int __init ohci_hcd_mod_init(void) sizeof (struct ed), sizeof (struct td)); #ifdef PS3_SYSTEM_BUS_DRIVER - if (firmware_has_feature(FW_FEATURE_PS3_LV1)) { - retval = ps3_system_bus_driver_register( - &PS3_SYSTEM_BUS_DRIVER); - if (retval < 0) - goto error_ps3; - } + retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER); + if (retval < 0) + goto error_ps3; #endif #ifdef PLATFORM_DRIVER @@ -991,8 +994,7 @@ static int __init ohci_hcd_mod_init(void) error_platform: #endif #ifdef PS3_SYSTEM_BUS_DRIVER - if (firmware_has_feature(FW_FEATURE_PS3_LV1)) - ps3_system_bus_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); + ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); error_ps3: #endif return retval; @@ -1014,8 +1016,7 @@ static void __exit ohci_hcd_mod_exit(void) platform_driver_unregister(&PLATFORM_DRIVER); #endif #ifdef PS3_SYSTEM_BUS_DRIVER - if (firmware_has_feature(FW_FEATURE_PS3_LV1)) - ps3_system_bus_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); + ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER); #endif } module_exit(ohci_hcd_mod_exit); |