From 5c8d61bfcc6396f80b884e0f23f08cbd8bf10778 Mon Sep 17 00:00:00 2001 From: Matthieu CASTET Date: Tue, 15 Feb 2011 18:41:54 +0100 Subject: [PATCH] USB: make ehci msm driver use ehci_run. Now that ehci_run don't call ehci_reset, we can use ehci_run. Signed-off-by: Matthieu CASTET Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-msm.c | 92 ++----------------------------------- 1 file changed, 5 insertions(+), 87 deletions(-) diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c index 413f4deca532..a80001420e3e 100644 --- a/drivers/usb/host/ehci-msm.c +++ b/drivers/usb/host/ehci-msm.c @@ -34,92 +34,6 @@ static struct otg_transceiver *otg; -/* - * ehci_run defined in drivers/usb/host/ehci-hcd.c reset the controller and - * the configuration settings in ehci_msm_reset vanish after controller is - * reset. Resetting the controler in ehci_run seems to be un-necessary - * provided HCD reset the controller before calling ehci_run. Most of the HCD - * do but some are not. So this function is same as ehci_run but we don't - * reset the controller here. - */ -static int ehci_msm_run(struct usb_hcd *hcd) -{ - struct ehci_hcd *ehci = hcd_to_ehci(hcd); - u32 temp; - u32 hcc_params; - - hcd->uses_new_polling = 1; - - ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); - ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next); - - /* - * hcc_params controls whether ehci->regs->segment must (!!!) - * be used; it constrains QH/ITD/SITD and QTD locations. - * pci_pool consistent memory always uses segment zero. - * streaming mappings for I/O buffers, like pci_map_single(), - * can return segments above 4GB, if the device allows. - * - * NOTE: the dma mask is visible through dma_supported(), so - * drivers can pass this info along ... like NETIF_F_HIGHDMA, - * Scsi_Host.highmem_io, and so forth. It's readonly to all - * host side drivers though. - */ - hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params); - if (HCC_64BIT_ADDR(hcc_params)) - ehci_writel(ehci, 0, &ehci->regs->segment); - - /* - * Philips, Intel, and maybe others need CMD_RUN before the - * root hub will detect new devices (why?); NEC doesn't - */ - ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); - ehci->command |= CMD_RUN; - ehci_writel(ehci, ehci->command, &ehci->regs->command); - dbg_cmd(ehci, "init", ehci->command); - - /* - * Start, enabling full USB 2.0 functionality ... usb 1.1 devices - * are explicitly handed to companion controller(s), so no TT is - * involved with the root hub. (Except where one is integrated, - * and there's no companion controller unless maybe for USB OTG.) - * - * Turning on the CF flag will transfer ownership of all ports - * from the companions to the EHCI controller. If any of the - * companions are in the middle of a port reset at the time, it - * could cause trouble. Write-locking ehci_cf_port_reset_rwsem - * guarantees that no resets are in progress. After we set CF, - * a short delay lets the hardware catch up; new resets shouldn't - * be started before the port switching actions could complete. - */ - down_write(&ehci_cf_port_reset_rwsem); - hcd->state = HC_STATE_RUNNING; - ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); - ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ - usleep_range(5000, 5500); - up_write(&ehci_cf_port_reset_rwsem); - ehci->last_periodic_enable = ktime_get_real(); - - temp = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase)); - ehci_info(ehci, - "USB %x.%x started, EHCI %x.%02x%s\n", - ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), - temp >> 8, temp & 0xff, - ignore_oc ? ", overcurrent ignored" : ""); - - ehci_writel(ehci, INTR_MASK, - &ehci->regs->intr_enable); /* Turn On Interrupts */ - - /* GRR this is run-once init(), being done every time the HC starts. - * So long as they're part of class devices, we can't do it init() - * since the class device isn't created that early. - */ - create_debug_files(ehci); - create_companion_file(ehci); - - return 0; -} - static int ehci_msm_reset(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); @@ -135,6 +49,10 @@ static int ehci_msm_reset(struct usb_hcd *hcd) hcd->has_tt = 1; ehci->sbrn = HCD_USB2; + retval = ehci_halt(ehci); + if (retval) + return retval; + /* data structure init */ retval = ehci_init(hcd); if (retval) @@ -167,7 +85,7 @@ static struct hc_driver msm_hc_driver = { .flags = HCD_USB2 | HCD_MEMORY, .reset = ehci_msm_reset, - .start = ehci_msm_run, + .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown, -- GitLab