lkml.org 
[lkml]   [2010]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC][PATCH 19/26] USB: Add JZ4740 ohci support
    Date
    This patch adds ohci glue code for JZ4740 SoCs ohci module.

    Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
    Cc: Greg Kroah-Hartman <gregkh@suse.de>
    Cc: David Brownell <dbrownell@users.sourceforge.net>
    Cc: linux-usb@vger.kernel.org
    ---
    drivers/usb/Kconfig | 1 +
    drivers/usb/host/ohci-hcd.c | 5 +
    drivers/usb/host/ohci-jz4740.c | 264 ++++++++++++++++++++++++++++++++++++++++
    3 files changed, 270 insertions(+), 0 deletions(-)
    create mode 100644 drivers/usb/host/ohci-jz4740.c

    diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
    index 6a58cb1..39a6bfd 100644
    --- a/drivers/usb/Kconfig
    +++ b/drivers/usb/Kconfig
    @@ -46,6 +46,7 @@ config USB_ARCH_HAS_OHCI
    default y if PPC_MPC52xx
    # MIPS:
    default y if SOC_AU1X00
    + default y if MACH_JZ4740
    # SH:
    default y if CPU_SUBTYPE_SH7720
    default y if CPU_SUBTYPE_SH7721
    diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
    index fc57655..05b071c 100644
    --- a/drivers/usb/host/ohci-hcd.c
    +++ b/drivers/usb/host/ohci-hcd.c
    @@ -1095,6 +1095,11 @@ MODULE_LICENSE ("GPL");
    #define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
    #endif

    +#ifdef CONFIG_MACH_JZ4740
    +#include "ohci-jz4740.c"
    +#define PLATFORM_DRIVER ohci_hcd_jz4740_driver
    +#endif
    +
    #if !defined(PCI_DRIVER) && \
    !defined(PLATFORM_DRIVER) && \
    !defined(OMAP1_PLATFORM_DRIVER) && \
    diff --git a/drivers/usb/host/ohci-jz4740.c b/drivers/usb/host/ohci-jz4740.c
    new file mode 100644
    index 0000000..0371b17
    --- /dev/null
    +++ b/drivers/usb/host/ohci-jz4740.c
    @@ -0,0 +1,264 @@
    +
    +#include <linux/platform_device.h>
    +#include <linux/clk.h>
    +#include <linux/regulator/consumer.h>
    +
    +struct jz4740_ohci_hcd {
    + struct ohci_hcd ohci_hcd;
    +
    + struct regulator *vbus;
    + bool vbus_enabled;
    + struct clk *clk;
    +};
    +
    +static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
    +{
    + return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
    +}
    +
    +static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd *jz4740_ohci)
    +{
    + return container_of((void *)jz4740_ohci, struct usb_hcd, hcd_priv);
    +}
    +
    +static int ohci_jz4740_start(struct usb_hcd *hcd)
    +{
    + struct ohci_hcd *ohci = hcd_to_ohci(hcd);
    + int ret;
    +
    + ret = ohci_init(ohci);
    + if (ret < 0)
    + return ret;
    +
    + ohci->num_ports = 1;
    +
    + ret = ohci_run(ohci);
    + if (ret < 0) {
    + dev_err(hcd->self.controller, "Can not start %s",
    + hcd->self.bus_name);
    + ohci_stop(hcd);
    + return ret;
    + }
    + return 0;
    +}
    +
    +static int ohci_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
    + bool enabled)
    +{
    + int ret = 0;
    +
    + if (!jz4740_ohci->vbus)
    + return 0;
    +
    + if (enabled && !jz4740_ohci->vbus_enabled) {
    + ret = regulator_enable(jz4740_ohci->vbus);
    + if (ret)
    + dev_err(jz4740_hcd_to_hcd(jz4740_ohci)->self.controller,
    + "Could not power vbus\n");
    + } else if (!enabled && jz4740_ohci->vbus_enabled) {
    + ret = regulator_disable(jz4740_ohci->vbus);
    + }
    +
    + if (ret == 0)
    + jz4740_ohci->vbus_enabled = enabled;
    +
    + return ret;
    +}
    +
    +static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
    + u16 wIndex, char *buf, u16 wLength)
    +{
    + struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
    + int ret;
    +
    + switch (typeReq) {
    + case SetHubFeature:
    + if (wValue == USB_PORT_FEAT_POWER)
    + ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
    + break;
    + case ClearHubFeature:
    + if (wValue == USB_PORT_FEAT_POWER)
    + ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
    + break;
    + }
    +
    + if (ret)
    + return ret;
    +
    + return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
    +}
    +
    +
    +static const struct hc_driver ohci_jz4740_hc_driver = {
    + .description = hcd_name,
    + .product_desc = "JZ4740 OHCI",
    + .hcd_priv_size = sizeof(struct jz4740_ohci_hcd),
    +
    + /*
    + * generic hardware linkage
    + */
    + .irq = ohci_irq,
    + .flags = HCD_USB11 | HCD_MEMORY,
    +
    + /*
    + * basic lifecycle operations
    + */
    + .start = ohci_jz4740_start,
    + .stop = ohci_stop,
    + .shutdown = ohci_shutdown,
    +
    + /*
    + * managing i/o requests and associated device resources
    + */
    + .urb_enqueue = ohci_urb_enqueue,
    + .urb_dequeue = ohci_urb_dequeue,
    + .endpoint_disable = ohci_endpoint_disable,
    +
    + /*
    + * scheduling support
    + */
    + .get_frame_number = ohci_get_frame,
    +
    + /*
    + * root hub support
    + */
    + .hub_status_data = ohci_hub_status_data,
    + .hub_control = ohci_jz4740_hub_control,
    +#ifdef CONFIG_PM
    + .bus_suspend = ohci_bus_suspend,
    + .bus_resume = ohci_bus_resume,
    +#endif
    + .start_port_reset = ohci_start_port_reset,
    +};
    +
    +
    +static __devinit int jz4740_ohci_probe(struct platform_device *pdev)
    +{
    + int ret;
    + struct usb_hcd *hcd;
    + struct jz4740_ohci_hcd *jz4740_ohci;
    + struct resource *res;
    + int irq;
    +
    + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    +
    + if (!res) {
    + dev_err(&pdev->dev, "Failed to get platform resource\n");
    + return -ENOENT;
    + }
    +
    + irq = platform_get_irq(pdev, 0);
    + if (irq < 0) {
    + dev_err(&pdev->dev, "Failed to get platform irq\n");
    + return irq;
    + }
    +
    + hcd = usb_create_hcd(&ohci_jz4740_hc_driver, &pdev->dev, "jz4740");
    + if (!hcd) {
    + dev_err(&pdev->dev, "Failed to create hcd.\n");
    + return -ENOMEM;
    + }
    +
    + jz4740_ohci = hcd_to_jz4740_hcd(hcd);
    +
    + res = request_mem_region(res->start, resource_size(res), hcd_name);
    +
    + if (!res) {
    + dev_err(&pdev->dev, "Failed to request mem region.\n");
    + ret = -EBUSY;
    + goto err_free;
    + }
    +
    + hcd->rsrc_start = res->start;
    + hcd->rsrc_len = resource_size(res);
    + hcd->regs = ioremap(res->start, resource_size(res));
    +
    + if (!hcd->regs) {
    + dev_err(&pdev->dev, "Failed to ioremap registers.\n");
    + ret = -EBUSY;
    + goto err_release_mem;
    + }
    +
    + jz4740_ohci->clk = clk_get(&pdev->dev, "uhc");
    + if (IS_ERR(jz4740_ohci->clk)) {
    + ret = PTR_ERR(jz4740_ohci->clk);
    + dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
    + goto err_iounmap;
    + }
    +
    + jz4740_ohci->vbus = regulator_get(&pdev->dev, "vbus");
    + if (IS_ERR(jz4740_ohci->vbus))
    + jz4740_ohci->vbus = NULL;
    +
    +
    + clk_set_rate(jz4740_ohci->clk, 48000000);
    + clk_enable(jz4740_ohci->clk);
    + if (jz4740_ohci->vbus)
    + ohci_jz4740_set_vbus_power(jz4740_ohci, true);
    +
    + platform_set_drvdata(pdev, hcd);
    +
    + ohci_hcd_init(hcd_to_ohci(hcd));
    +
    + ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
    + if (ret) {
    + dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
    + goto err_disable;
    + }
    +
    + return 0;
    +
    +err_disable:
    + platform_set_drvdata(pdev, NULL);
    + if (jz4740_ohci->vbus) {
    + regulator_disable(jz4740_ohci->vbus);
    + regulator_put(jz4740_ohci->vbus);
    + }
    + clk_disable(jz4740_ohci->clk);
    +
    + clk_put(jz4740_ohci->clk);
    +err_iounmap:
    + iounmap(hcd->regs);
    +err_release_mem:
    + release_mem_region(res->start, resource_size(res));
    +err_free:
    + usb_put_hcd(hcd);
    +
    + return ret;
    +}
    +
    +static __devexit int jz4740_ohci_remove(struct platform_device *pdev)
    +{
    + struct usb_hcd *hcd = platform_get_drvdata(pdev);
    + struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
    +
    + usb_remove_hcd(hcd);
    +
    + platform_set_drvdata(pdev, NULL);
    +
    + if (jz4740_ohci->vbus) {
    + regulator_disable(jz4740_ohci->vbus);
    + regulator_put(jz4740_ohci->vbus);
    + }
    +
    + clk_disable(jz4740_ohci->clk);
    + clk_put(jz4740_ohci->clk);
    +
    + iounmap(hcd->regs);
    + release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
    +
    + usb_put_hcd(hcd);
    +
    + return 0;
    +}
    +
    +static struct platform_driver ohci_hcd_jz4740_driver = {
    + .probe = jz4740_ohci_probe,
    + .remove = __devexit_p(jz4740_ohci_remove),
    + .driver = {
    + .name = "jz4740-ohci",
    + .owner = THIS_MODULE,
    + },
    +};
    +
    +MODULE_ALIAS("platfrom:jz4740-ohci");
    --
    1.5.6.5


    \
     
     \ /
      Last update: 2010-06-02 21:17    [W:0.033 / U:91.508 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site