diff options
Diffstat (limited to 'packages/kexecboot/linux-kexecboot-2.6.24/tosa/0018-Fix-the-pxa2xx_udc-to-balance-calls-to-clk_enable-cl.patch')
| -rw-r--r-- | packages/kexecboot/linux-kexecboot-2.6.24/tosa/0018-Fix-the-pxa2xx_udc-to-balance-calls-to-clk_enable-cl.patch | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/packages/kexecboot/linux-kexecboot-2.6.24/tosa/0018-Fix-the-pxa2xx_udc-to-balance-calls-to-clk_enable-cl.patch b/packages/kexecboot/linux-kexecboot-2.6.24/tosa/0018-Fix-the-pxa2xx_udc-to-balance-calls-to-clk_enable-cl.patch new file mode 100644 index 0000000000..7bf4ad02d6 --- /dev/null +++ b/packages/kexecboot/linux-kexecboot-2.6.24/tosa/0018-Fix-the-pxa2xx_udc-to-balance-calls-to-clk_enable-cl.patch @@ -0,0 +1,225 @@ +From b9a0fdbf333b461682d5da8b9aaa42f4de91ffcf Mon Sep 17 00:00:00 2001 +From: Dmitry Baryshkov <dbaryshkov@gmail.com> +Date: Sun, 10 Feb 2008 03:29:17 +0300 +Subject: [PATCH 18/64] Fix the pxa2xx_udc to balance calls to clk_enable/clk_disable + +Signed-off-by: Dmitry Baryshkov dbaryshkov@gmail.com +--- + drivers/usb/gadget/pxa2xx_udc.c | 84 +++++++++++++++++++++++---------------- + drivers/usb/gadget/pxa2xx_udc.h | 6 ++- + 2 files changed, 54 insertions(+), 36 deletions(-) + +diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c +index 2900556..8e32d07 100644 +--- a/drivers/usb/gadget/pxa2xx_udc.c ++++ b/drivers/usb/gadget/pxa2xx_udc.c +@@ -680,7 +680,7 @@ pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) + + /* kickstart this i/o queue? */ + if (list_empty(&ep->queue) && !ep->stopped) { +- if (ep->desc == 0 /* ep0 */) { ++ if (ep->desc == NULL /* ep0 */) { + unsigned length = _req->length; + + switch (dev->ep0state) { +@@ -734,7 +734,7 @@ pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) + } + + /* pio or dma irq handler advances the queue. */ +- if (likely (req != 0)) ++ if (likely (req != NULL)) + list_add_tail(&req->queue, &ep->queue); + local_irq_restore(flags); + +@@ -934,20 +934,35 @@ static void udc_disable(struct pxa2xx_udc *); + /* We disable the UDC -- and its 48 MHz clock -- whenever it's not + * in active use. + */ +-static int pullup(struct pxa2xx_udc *udc, int is_active) ++static int pullup(struct pxa2xx_udc *udc) + { +- is_active = is_active && udc->vbus && udc->pullup; ++ int is_active = udc->vbus && udc->pullup && ! udc->suspended; + DMSG("%s\n", is_active ? "active" : "inactive"); +- if (is_active) +- udc_enable(udc); +- else { +- if (udc->gadget.speed != USB_SPEED_UNKNOWN) { +- DMSG("disconnect %s\n", udc->driver +- ? udc->driver->driver.name +- : "(no driver)"); +- stop_activity(udc, udc->driver); ++ if (is_active) { ++ if (!udc->active) { ++ udc->active = 1; ++#ifdef CONFIG_ARCH_PXA ++ /* Enable clock for USB device */ ++ clk_enable(udc->clk); ++#endif ++ udc_enable(udc); + } +- udc_disable(udc); ++ } else { ++ if (udc->active) { ++ if (udc->gadget.speed != USB_SPEED_UNKNOWN) { ++ DMSG("disconnect %s\n", udc->driver ++ ? udc->driver->driver.name ++ : "(no driver)"); ++ stop_activity(udc, udc->driver); ++ } ++ udc_disable(udc); ++#ifdef CONFIG_ARCH_PXA ++ /* Disable clock for USB device */ ++ clk_disable(udc->clk); ++#endif ++ udc->active = 0; ++ } ++ + } + return 0; + } +@@ -958,9 +973,9 @@ static int pxa2xx_udc_vbus_session(struct usb_gadget *_gadget, int is_active) + struct pxa2xx_udc *udc; + + udc = container_of(_gadget, struct pxa2xx_udc, gadget); +- udc->vbus = is_active = (is_active != 0); ++ udc->vbus = (is_active != 0); + DMSG("vbus %s\n", is_active ? "supplied" : "inactive"); +- pullup(udc, is_active); ++ pullup(udc); + return 0; + } + +@@ -975,9 +990,8 @@ static int pxa2xx_udc_pullup(struct usb_gadget *_gadget, int is_active) + if (!udc->mach->gpio_pullup && !udc->mach->udc_command) + return -EOPNOTSUPP; + +- is_active = (is_active != 0); +- udc->pullup = is_active; +- pullup(udc, is_active); ++ udc->pullup = (is_active != 0); ++ pullup(udc); + return 0; + } + +@@ -998,7 +1012,7 @@ static const struct usb_gadget_ops pxa2xx_udc_ops = { + + static struct pxa2xx_udc memory; + static int +-udc_seq_show(struct seq_file *m, void *d) ++udc_seq_show(struct seq_file *m, void *_d) + { + struct pxa2xx_udc *dev = m->private; + unsigned long flags; +@@ -1145,11 +1159,6 @@ static void udc_disable(struct pxa2xx_udc *dev) + + udc_clear_mask_UDCCR(UDCCR_UDE); + +-#ifdef CONFIG_ARCH_PXA +- /* Disable clock for USB device */ +- clk_disable(dev->clk); +-#endif +- + ep0_idle (dev); + dev->gadget.speed = USB_SPEED_UNKNOWN; + } +@@ -1190,11 +1199,6 @@ static void udc_enable (struct pxa2xx_udc *dev) + { + udc_clear_mask_UDCCR(UDCCR_UDE); + +-#ifdef CONFIG_ARCH_PXA +- /* Enable clock for USB device */ +- clk_enable(dev->clk); +-#endif +- + /* try to clear these bits before we enable the udc */ + udc_ack_int_UDCCR(UDCCR_SUSIR|/*UDCCR_RSTIR|*/UDCCR_RESIR); + +@@ -1285,7 +1289,7 @@ fail: + * for set_configuration as well as eventual disconnect. + */ + DMSG("registered gadget driver '%s'\n", driver->driver.name); +- pullup(dev, 1); ++ pullup(dev); + dump_state(dev); + return 0; + } +@@ -1328,7 +1332,8 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) + return -EINVAL; + + local_irq_disable(); +- pullup(dev, 0); ++ dev->pullup = 0; ++ pullup(dev); + stop_activity(dev, driver); + local_irq_enable(); + +@@ -2267,7 +2272,9 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev) + if (dev->driver) + return -EBUSY; + +- udc_disable(dev); ++ dev->pullup = 0; ++ pullup(dev); ++ + remove_debug_files(dev); + + if (dev->got_irq) { +@@ -2315,10 +2322,15 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev) + static int pxa2xx_udc_suspend(struct platform_device *dev, pm_message_t state) + { + struct pxa2xx_udc *udc = platform_get_drvdata(dev); ++ unsigned long flags; + + if (!udc->mach->gpio_pullup && !udc->mach->udc_command) + WARN("USB host won't detect disconnect!\n"); +- pullup(udc, 0); ++ udc->suspended = 1; ++ ++ local_irq_save(flags); ++ pullup(udc); ++ local_irq_restore(flags); + + return 0; + } +@@ -2326,8 +2338,12 @@ static int pxa2xx_udc_suspend(struct platform_device *dev, pm_message_t state) + static int pxa2xx_udc_resume(struct platform_device *dev) + { + struct pxa2xx_udc *udc = platform_get_drvdata(dev); ++ unsigned long flags; + +- pullup(udc, 1); ++ udc->suspended = 0; ++ local_irq_save(flags); ++ pullup(udc); ++ local_irq_restore(flags); + + return 0; + } +diff --git a/drivers/usb/gadget/pxa2xx_udc.h b/drivers/usb/gadget/pxa2xx_udc.h +index c08b1a2..93586b2 100644 +--- a/drivers/usb/gadget/pxa2xx_udc.h ++++ b/drivers/usb/gadget/pxa2xx_udc.h +@@ -119,7 +119,9 @@ struct pxa2xx_udc { + has_cfr : 1, + req_pending : 1, + req_std : 1, +- req_config : 1; ++ req_config : 1, ++ suspended : 1, ++ active : 1; + + #define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200)) + struct timer_list timer; +@@ -239,7 +241,7 @@ dump_state(struct pxa2xx_udc *dev) + dev->stats.read.bytes, dev->stats.read.ops); + + for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) { +- if (dev->ep [i].desc == 0) ++ if (dev->ep [i].desc == NULL) + continue; + DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs); + } +-- +1.5.3.8 + |