USB: OHCI: make ohci-pxa27x a separate driver
Separate the OHCI pxa27x/pxa3xx host controller driver from ohci-hcd host code so that it can be built as a separate driver module. This work is part of enabling multi-platform kernels on ARM. Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org> Signed-off-by: Deepak Saxena <dsaxena@linaro.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
e2404434b6
commit
b8ad5c3706
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@ -405,6 +405,14 @@ config USB_OHCI_HCD_EP93XX
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Enables support for the on-chip OHCI controller on
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EP93XX chips.
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config USB_OHCI_HCD_PXA27X
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tristate "Support for PXA27X/PXA3XX on-chip OHCI USB controller"
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depends on USB_OHCI_HCD && (PXA27x || PXA3xx)
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default y
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---help---
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Enables support for the on-chip OHCI controller on
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PXA27x/PXA3xx chips.
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config USB_OHCI_HCD_AT91
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tristate "Support for Atmel on-chip OHCI USB controller"
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depends on USB_OHCI_HCD && ARCH_AT91
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@ -55,6 +55,7 @@ obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o
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obj-$(CONFIG_USB_OHCI_HCD_S3C2410) += ohci-s3c2410.o
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obj-$(CONFIG_USB_OHCI_HCD_LPC32XX) += ohci-nxp.o
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obj-$(CONFIG_USB_OHCI_HCD_EP93XX) += ohci-ep93xx.o
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obj-$(CONFIG_USB_OHCI_HCD_PXA27X) += ohci-pxa27x.o
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obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
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obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
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@ -1177,11 +1177,6 @@ MODULE_LICENSE ("GPL");
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#define SA1111_DRIVER ohci_hcd_sa1111_driver
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#endif
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#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
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#include "ohci-pxa27x.c"
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#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
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#endif
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#ifdef CONFIG_ARCH_DAVINCI_DA8XX
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#include "ohci-da8xx.c"
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#define DAVINCI_PLATFORM_DRIVER ohci_hcd_da8xx_driver
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@ -19,15 +19,26 @@
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* This file is licenced under the GPL.
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*/
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#include <linux/device.h>
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#include <linux/signal.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/of_gpio.h>
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#include <mach/hardware.h>
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#include <linux/platform_data/usb-ohci-pxa27x.h>
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#include <linux/platform_data/usb-pxa3xx-ulpi.h>
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#include <linux/platform_device.h>
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#include <linux/signal.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/otg.h>
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#include <mach/hardware.h>
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#include "ohci.h"
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#define DRIVER_DESC "OHCI PXA27x/PXA3x driver"
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/*
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* UHC: USB Host Controller (OHCI-like) register definitions
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@ -101,16 +112,16 @@
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#define PXA_UHC_MAX_PORTNUM 3
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struct pxa27x_ohci {
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/* must be 1st member here for hcd_to_ohci() to work */
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struct ohci_hcd ohci;
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static const char hcd_name[] = "ohci-pxa27x";
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struct device *dev;
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static struct hc_driver __read_mostly ohci_pxa27x_hc_driver;
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struct pxa27x_ohci {
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struct clk *clk;
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void __iomem *mmio_base;
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};
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#define to_pxa27x_ohci(hcd) (struct pxa27x_ohci *)hcd_to_ohci(hcd)
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#define to_pxa27x_ohci(hcd) (struct pxa27x_ohci *)(hcd_to_ohci(hcd)->priv)
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/*
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PMM_NPS_MODE -- PMM Non-power switching mode
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@ -122,10 +133,10 @@ struct pxa27x_ohci {
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PMM_PERPORT_MODE -- PMM per port switching mode
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Ports are powered individually.
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*/
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static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *ohci, int mode)
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static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *pxa_ohci, int mode)
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{
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uint32_t uhcrhda = __raw_readl(ohci->mmio_base + UHCRHDA);
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uint32_t uhcrhdb = __raw_readl(ohci->mmio_base + UHCRHDB);
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uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA);
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uint32_t uhcrhdb = __raw_readl(pxa_ohci->mmio_base + UHCRHDB);
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switch (mode) {
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case PMM_NPS_MODE:
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@ -149,20 +160,18 @@ static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *ohci, int mode)
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uhcrhda |= RH_A_NPS;
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}
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__raw_writel(uhcrhda, ohci->mmio_base + UHCRHDA);
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__raw_writel(uhcrhdb, ohci->mmio_base + UHCRHDB);
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__raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA);
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__raw_writel(uhcrhdb, pxa_ohci->mmio_base + UHCRHDB);
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return 0;
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}
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extern int usb_disabled(void);
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/*-------------------------------------------------------------------------*/
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static inline void pxa27x_setup_hc(struct pxa27x_ohci *ohci,
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static inline void pxa27x_setup_hc(struct pxa27x_ohci *pxa_ohci,
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struct pxaohci_platform_data *inf)
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{
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uint32_t uhchr = __raw_readl(ohci->mmio_base + UHCHR);
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uint32_t uhcrhda = __raw_readl(ohci->mmio_base + UHCRHDA);
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uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR);
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uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA);
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if (inf->flags & ENABLE_PORT1)
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uhchr &= ~UHCHR_SSEP1;
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@ -194,17 +203,17 @@ static inline void pxa27x_setup_hc(struct pxa27x_ohci *ohci,
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uhcrhda |= UHCRHDA_POTPGT(inf->power_on_delay / 2);
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}
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__raw_writel(uhchr, ohci->mmio_base + UHCHR);
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__raw_writel(uhcrhda, ohci->mmio_base + UHCRHDA);
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__raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
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__raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA);
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}
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static inline void pxa27x_reset_hc(struct pxa27x_ohci *ohci)
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static inline void pxa27x_reset_hc(struct pxa27x_ohci *pxa_ohci)
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{
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uint32_t uhchr = __raw_readl(ohci->mmio_base + UHCHR);
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uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR);
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__raw_writel(uhchr | UHCHR_FHR, ohci->mmio_base + UHCHR);
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__raw_writel(uhchr | UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
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udelay(11);
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__raw_writel(uhchr & ~UHCHR_FHR, ohci->mmio_base + UHCHR);
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__raw_writel(uhchr & ~UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
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}
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#ifdef CONFIG_PXA27x
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@ -213,25 +222,26 @@ extern void pxa27x_clear_otgph(void);
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#define pxa27x_clear_otgph() do {} while (0)
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#endif
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static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
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static int pxa27x_start_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
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{
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int retval = 0;
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struct pxaohci_platform_data *inf;
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uint32_t uhchr;
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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inf = dev_get_platdata(dev);
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clk_prepare_enable(ohci->clk);
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clk_prepare_enable(pxa_ohci->clk);
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pxa27x_reset_hc(ohci);
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pxa27x_reset_hc(pxa_ohci);
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uhchr = __raw_readl(ohci->mmio_base + UHCHR) | UHCHR_FSBIR;
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__raw_writel(uhchr, ohci->mmio_base + UHCHR);
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uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) | UHCHR_FSBIR;
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__raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
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while (__raw_readl(ohci->mmio_base + UHCHR) & UHCHR_FSBIR)
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while (__raw_readl(pxa_ohci->mmio_base + UHCHR) & UHCHR_FSBIR)
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cpu_relax();
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pxa27x_setup_hc(ohci, inf);
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pxa27x_setup_hc(pxa_ohci, inf);
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if (inf->init)
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retval = inf->init(dev);
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@ -240,38 +250,39 @@ static int pxa27x_start_hc(struct pxa27x_ohci *ohci, struct device *dev)
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return retval;
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if (cpu_is_pxa3xx())
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pxa3xx_u2d_start_hc(&ohci_to_hcd(&ohci->ohci)->self);
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pxa3xx_u2d_start_hc(&hcd->self);
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uhchr = __raw_readl(ohci->mmio_base + UHCHR) & ~UHCHR_SSE;
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__raw_writel(uhchr, ohci->mmio_base + UHCHR);
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__raw_writel(UHCHIE_UPRIE | UHCHIE_RWIE, ohci->mmio_base + UHCHIE);
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uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) & ~UHCHR_SSE;
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__raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
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__raw_writel(UHCHIE_UPRIE | UHCHIE_RWIE, pxa_ohci->mmio_base + UHCHIE);
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/* Clear any OTG Pin Hold */
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pxa27x_clear_otgph();
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return 0;
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}
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static void pxa27x_stop_hc(struct pxa27x_ohci *ohci, struct device *dev)
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static void pxa27x_stop_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
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{
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struct pxaohci_platform_data *inf;
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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uint32_t uhccoms;
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inf = dev_get_platdata(dev);
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if (cpu_is_pxa3xx())
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pxa3xx_u2d_stop_hc(&ohci_to_hcd(&ohci->ohci)->self);
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pxa3xx_u2d_stop_hc(&hcd->self);
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if (inf->exit)
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inf->exit(dev);
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pxa27x_reset_hc(ohci);
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pxa27x_reset_hc(pxa_ohci);
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/* Host Controller Reset */
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uhccoms = __raw_readl(ohci->mmio_base + UHCCOMS) | 0x01;
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__raw_writel(uhccoms, ohci->mmio_base + UHCCOMS);
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uhccoms = __raw_readl(pxa_ohci->mmio_base + UHCCOMS) | 0x01;
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__raw_writel(uhccoms, pxa_ohci->mmio_base + UHCCOMS);
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udelay(10);
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clk_disable_unprepare(ohci->clk);
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clk_disable_unprepare(pxa_ohci->clk);
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}
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#ifdef CONFIG_OF
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@ -356,7 +367,8 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
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int retval, irq;
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struct usb_hcd *hcd;
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struct pxaohci_platform_data *inf;
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struct pxa27x_ohci *ohci;
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struct pxa27x_ohci *pxa_ohci;
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struct ohci_hcd *ohci;
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struct resource *r;
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struct clk *usb_clk;
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@ -409,29 +421,31 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
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}
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/* initialize "struct pxa27x_ohci" */
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ohci = (struct pxa27x_ohci *)hcd_to_ohci(hcd);
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ohci->dev = &pdev->dev;
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ohci->clk = usb_clk;
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ohci->mmio_base = (void __iomem *)hcd->regs;
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pxa_ohci = to_pxa27x_ohci(hcd);
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pxa_ohci->clk = usb_clk;
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pxa_ohci->mmio_base = (void __iomem *)hcd->regs;
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if ((retval = pxa27x_start_hc(ohci, &pdev->dev)) < 0) {
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retval = pxa27x_start_hc(pxa_ohci, &pdev->dev);
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if (retval < 0) {
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pr_debug("pxa27x_start_hc failed");
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goto err3;
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}
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/* Select Power Management Mode */
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pxa27x_ohci_select_pmm(ohci, inf->port_mode);
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pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode);
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if (inf->power_budget)
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hcd->power_budget = inf->power_budget;
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ohci_hcd_init(hcd_to_ohci(hcd));
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/* The value of NDP in roothub_a is incorrect on this hardware */
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ohci = hcd_to_ohci(hcd);
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ohci->num_ports = 3;
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retval = usb_add_hcd(hcd, irq, 0);
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if (retval == 0)
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return retval;
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pxa27x_stop_hc(ohci, &pdev->dev);
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pxa27x_stop_hc(pxa_ohci, &pdev->dev);
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err3:
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iounmap(hcd->regs);
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err2:
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@ -459,88 +473,18 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
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*/
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void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
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{
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struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
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struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
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usb_remove_hcd(hcd);
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pxa27x_stop_hc(ohci, &pdev->dev);
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pxa27x_stop_hc(pxa_ohci, &pdev->dev);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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clk_put(pxa_ohci->clk);
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usb_put_hcd(hcd);
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clk_put(ohci->clk);
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}
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/*-------------------------------------------------------------------------*/
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static int
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ohci_pxa27x_start (struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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int ret;
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ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
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/* The value of NDP in roothub_a is incorrect on this hardware */
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ohci->num_ports = 3;
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if ((ret = ohci_init(ohci)) < 0)
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return ret;
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if ((ret = ohci_run (ohci)) < 0) {
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dev_err(hcd->self.controller, "can't start %s",
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hcd->self.bus_name);
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ohci_stop (hcd);
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return ret;
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}
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return 0;
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}
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ohci_pxa27x_hc_driver = {
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.description = hcd_name,
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.product_desc = "PXA27x OHCI",
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.hcd_priv_size = sizeof(struct pxa27x_ohci),
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.start = ohci_pxa27x_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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/*-------------------------------------------------------------------------*/
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static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
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{
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pr_debug ("In ohci_hcd_pxa27x_drv_probe");
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@ -563,32 +507,35 @@ static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
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static int ohci_hcd_pxa27x_drv_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
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struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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||||
|
||||
if (time_before(jiffies, ohci->ohci.next_statechange))
|
||||
if (time_before(jiffies, ohci->next_statechange))
|
||||
msleep(5);
|
||||
ohci->ohci.next_statechange = jiffies;
|
||||
ohci->next_statechange = jiffies;
|
||||
|
||||
pxa27x_stop_hc(ohci, dev);
|
||||
pxa27x_stop_hc(pxa_ohci, dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ohci_hcd_pxa27x_drv_resume(struct device *dev)
|
||||
{
|
||||
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
||||
struct pxa27x_ohci *ohci = to_pxa27x_ohci(hcd);
|
||||
struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
|
||||
struct pxaohci_platform_data *inf = dev_get_platdata(dev);
|
||||
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
||||
int status;
|
||||
|
||||
if (time_before(jiffies, ohci->ohci.next_statechange))
|
||||
if (time_before(jiffies, ohci->next_statechange))
|
||||
msleep(5);
|
||||
ohci->ohci.next_statechange = jiffies;
|
||||
ohci->next_statechange = jiffies;
|
||||
|
||||
if ((status = pxa27x_start_hc(ohci, dev)) < 0)
|
||||
status = pxa27x_start_hc(pxa_ohci, dev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
/* Select Power Management Mode */
|
||||
pxa27x_ohci_select_pmm(ohci, inf->port_mode);
|
||||
pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode);
|
||||
|
||||
ohci_resume(hcd, false);
|
||||
return 0;
|
||||
|
@ -600,9 +547,6 @@ static const struct dev_pm_ops ohci_hcd_pxa27x_pm_ops = {
|
|||
};
|
||||
#endif
|
||||
|
||||
/* work with hotplug and coldplug */
|
||||
MODULE_ALIAS("platform:pxa27x-ohci");
|
||||
|
||||
static struct platform_driver ohci_hcd_pxa27x_driver = {
|
||||
.probe = ohci_hcd_pxa27x_drv_probe,
|
||||
.remove = ohci_hcd_pxa27x_drv_remove,
|
||||
|
@ -617,3 +561,27 @@ static struct platform_driver ohci_hcd_pxa27x_driver = {
|
|||
},
|
||||
};
|
||||
|
||||
static const struct ohci_driver_overrides pxa27x_overrides __initconst = {
|
||||
.extra_priv_size = sizeof(struct pxa27x_ohci),
|
||||
};
|
||||
|
||||
static int __init ohci_pxa27x_init(void)
|
||||
{
|
||||
if (usb_disabled())
|
||||
return -ENODEV;
|
||||
|
||||
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
|
||||
ohci_init_driver(&ohci_pxa27x_hc_driver, &pxa27x_overrides);
|
||||
return platform_driver_register(&ohci_hcd_pxa27x_driver);
|
||||
}
|
||||
module_init(ohci_pxa27x_init);
|
||||
|
||||
static void __exit ohci_pxa27x_cleanup(void)
|
||||
{
|
||||
platform_driver_unregister(&ohci_hcd_pxa27x_driver);
|
||||
}
|
||||
module_exit(ohci_pxa27x_cleanup);
|
||||
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:pxa27x-ohci");
|
||||
|
|
Loading…
Reference in a new issue