[RFC][PATCH 19/26] USB: Add JZ4740 ohci support

Lars-Peter Clausen
2010-06-02T19:14:09Z

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