314 lines
7.3 KiB
Diff
314 lines
7.3 KiB
Diff
From 633d5f445a0149ae32e814f794eae04ae2571c42 Mon Sep 17 00:00:00 2001
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From: Lars-Peter Clausen <lars@metafoo.de>
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Date: Sat, 24 Apr 2010 17:18:49 +0200
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Subject: [PATCH] Add jz4740 ohci driver
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---
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drivers/usb/Kconfig | 1 +
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drivers/usb/host/ohci-hcd.c | 5 +
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drivers/usb/host/ohci-jz4740.c | 264 ++++++++++++++++++++++++++++++++++++++++
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3 files changed, 270 insertions(+), 0 deletions(-)
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create mode 100644 drivers/usb/host/ohci-jz4740.c
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diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
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index 6a58cb1..46b8dc6 100644
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--- a/drivers/usb/Kconfig
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+++ b/drivers/usb/Kconfig
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@@ -46,6 +46,7 @@ config USB_ARCH_HAS_OHCI
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default y if PPC_MPC52xx
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# MIPS:
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default y if SOC_AU1X00
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+ default y if SOC_JZ4740
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# SH:
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default y if CPU_SUBTYPE_SH7720
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default y if CPU_SUBTYPE_SH7721
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diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
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index afe59be..d4ec333 100644
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--- a/drivers/usb/host/ohci-hcd.c
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+++ b/drivers/usb/host/ohci-hcd.c
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@@ -1090,6 +1090,11 @@ MODULE_LICENSE ("GPL");
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#define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
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#endif
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+#ifdef CONFIG_SOC_JZ4740
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+#include "ohci-jz4740.c"
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+#define PLATFORM_DRIVER ohci_hcd_jz4740_driver
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+#endif
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+
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#if !defined(PCI_DRIVER) && \
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!defined(PLATFORM_DRIVER) && \
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!defined(OF_PLATFORM_DRIVER) && \
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diff --git a/drivers/usb/host/ohci-jz4740.c b/drivers/usb/host/ohci-jz4740.c
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new file mode 100644
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index 0000000..ac190b4
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--- /dev/null
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+++ b/drivers/usb/host/ohci-jz4740.c
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@@ -0,0 +1,264 @@
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+
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+#include <linux/platform_device.h>
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+#include <linux/clk.h>
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+#include <linux/regulator/consumer.h>
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+
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+struct jz4740_ohci_hcd {
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+ struct ohci_hcd ohci_hcd;
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+
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+ struct regulator *vbus;
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+ bool vbus_enabled;
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+ struct clk *clk;
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+};
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+
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+static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
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+{
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+ return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
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+}
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+
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+static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd *jz4740_ohci)
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+{
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+ return container_of ((void *) jz4740_ohci, struct usb_hcd, hcd_priv);
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+}
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+
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+
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+static int ohci_jz4740_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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+
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+ ret = ohci_init(ohci);
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+ if (ret < 0)
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+ return ret;
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+
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+ ohci->num_ports = 1;
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+
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+ ret = ohci_run(ohci);
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+ if (ret < 0) {
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+ dev_err(hcd->self.controller, "Can not 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 int ohci_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
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+ bool enabled)
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+{
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+ int ret = 0;
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+
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+ if (enabled && !jz4740_ohci->vbus_enabled) {
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+ ret = regulator_enable(jz4740_ohci->vbus);
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+ if (ret)
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+ dev_err(jz4740_hcd_to_hcd(jz4740_ohci)->self.controller,
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+ "Could not power vbus\n");
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+ } else if(!enabled && jz4740_ohci->vbus_enabled) {
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+ ret = regulator_disable(jz4740_ohci->vbus);
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+ }
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+
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+ if (ret == 0)
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+ jz4740_ohci->vbus_enabled = enabled;
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+
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+ return ret;
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+}
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+
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+static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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+ u16 wIndex, char *buf, u16 wLength)
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+{
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+ struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
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+ int ret;
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+
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+ if (jz4740_ohci->vbus) {
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+ switch (typeReq) {
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+ case SetHubFeature:
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+ if (wValue == USB_PORT_FEAT_POWER)
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+ ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
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+ break;
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+ case ClearHubFeature:
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+ if (wValue == USB_PORT_FEAT_POWER)
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+ ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
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+ break;
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+ }
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+ }
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+
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+ if (ret)
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+ return ret;
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+
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+ return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
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+}
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+
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+
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+static const struct hc_driver ohci_jz4740_hc_driver = {
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+ .description = hcd_name,
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+ .product_desc = "JZ4740 OHCI",
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+ .hcd_priv_size = sizeof(struct jz4740_ohci_hcd),
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+
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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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+ /*
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+ * basic lifecycle operations
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+ */
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+ .start = ohci_jz4740_start,
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+ .stop = ohci_stop,
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+ .shutdown = ohci_shutdown,
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+
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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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+ /*
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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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+ /*
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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_jz4740_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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+
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+static __devinit int jz4740_ohci_probe(struct platform_device *pdev)
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+{
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+ int ret;
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+ struct usb_hcd *hcd;
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+ struct jz4740_ohci_hcd *jz4740_ohci;
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+ struct resource *res;
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+ int irq;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+
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+ if (!res) {
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+ dev_err(&pdev->dev, "Failed to get platform resource\n");
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+ return -ENOENT;
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+ }
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+
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+ irq = platform_get_irq(pdev, 0);
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+ if (irq < 0) {
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+ dev_err(&pdev->dev, "Failed to get platform irq\n");
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+ return irq;
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+ }
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+
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+ hcd = usb_create_hcd(&ohci_jz4740_hc_driver, &pdev->dev, "jz4740");
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+ if (!hcd) {
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+ dev_err(&pdev->dev, "Failed to create hcd.\n");
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+ return -ENOMEM;
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+ }
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+
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+ jz4740_ohci = hcd_to_jz4740_hcd(hcd);
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+
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+ res = request_mem_region(res->start, resource_size(res), hcd_name);
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+
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+ if (!res) {
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+ dev_err(&pdev->dev, "Failed to request mem region.\n");
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+ ret = -EBUSY;
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+ goto err_free;
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+ }
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+
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+ hcd->rsrc_start = res->start;
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+ hcd->rsrc_len = resource_size(res);
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+ hcd->regs = ioremap(res->start, resource_size(res));
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+
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+ if (!hcd->regs) {
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+ dev_err(&pdev->dev, "Failed to ioremap registers.\n");
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+ ret = -EBUSY;
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+ goto err_release_mem;
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+ }
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+
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+ jz4740_ohci->clk = clk_get(&pdev->dev, "uhc");
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+ if (IS_ERR(jz4740_ohci->clk)) {
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+ ret = PTR_ERR(jz4740_ohci->clk);
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+ dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
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+ goto err_iounmap;
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+ }
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+
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+ jz4740_ohci->vbus = regulator_get(&pdev->dev, "vbus");
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+ if (IS_ERR(jz4740_ohci->vbus))
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+ jz4740_ohci->vbus = NULL;
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+
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+
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+ clk_set_rate(jz4740_ohci->clk, 48000000);
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+ clk_enable(jz4740_ohci->clk);
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+ if (jz4740_ohci->vbus)
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+ ohci_jz4740_set_vbus_power(jz4740_ohci, true);
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+
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+ platform_set_drvdata(pdev, hcd);
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+
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+ ohci_hcd_init(hcd_to_ohci(hcd));
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+
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+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
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+ if (ret) {
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+ dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
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+ goto err_disable;
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+ }
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+
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+ return 0;
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+
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+err_disable:
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+ platform_set_drvdata(pdev, NULL);
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+ if (jz4740_ohci->vbus) {
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+ regulator_disable(jz4740_ohci->vbus);
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+ regulator_put(jz4740_ohci->vbus);
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+ }
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+ clk_disable(jz4740_ohci->clk);
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+
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+ clk_put(jz4740_ohci->clk);
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+err_iounmap:
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+ iounmap(hcd->regs);
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+err_release_mem:
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+ release_mem_region(res->start, resource_size(res));
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+err_free:
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+ usb_put_hcd(hcd);
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+
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+ return ret;
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+}
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+
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+static __devexit int jz4740_ohci_remove(struct platform_device *pdev)
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+{
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+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
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+ struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
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+
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+ usb_remove_hcd(hcd);
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+
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+ platform_set_drvdata(pdev, NULL);
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+
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+ if (jz4740_ohci->vbus) {
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+ regulator_disable(jz4740_ohci->vbus);
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+ regulator_put(jz4740_ohci->vbus);
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+ }
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+
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+ clk_disable(jz4740_ohci->clk);
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+ clk_put(jz4740_ohci->clk);
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+
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+ iounmap(hcd->regs);
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+
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+ usb_put_hcd(hcd);
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+
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+ return 0;
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+}
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+
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+static struct platform_driver ohci_hcd_jz4740_driver = {
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+ .probe = jz4740_ohci_probe,
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+ .remove = __devexit_p(jz4740_ohci_remove),
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+ .driver = {
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+ .name = "jz4740-ohci",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+MODULE_ALIAS("platfrom:jz4740-ohci");
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--
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1.5.6.5
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