From: Paul Mundt <lethal@xxxxxxxxxxxx>
This adds a trivial stub for supporting EHCI mode of the on-chip
SH USB host controllers.
Signed-off-by: Paul Mundt <lethal@xxxxxxxxxxxx>
---
drivers/usb/Kconfig | 1 +
drivers/usb/host/ehci-hcd.c | 5 +
drivers/usb/host/ehci-sh.c | 232 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 238 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ehci-sh.c
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 67eb377..22a9173 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -66,6 +66,7 @@ config USB_ARCH_HAS_EHCI
default y if ARCH_AT91SAM9G45
default y if ARCH_MXC
default y if ARCH_OMAP3
+ default y if CPU_SUBTYPE_SH7786
default PCI
# ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 502a7e6..02ffbea 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1166,6 +1166,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_mxc_driver
#endif
+#ifdef CONFIG_CPU_SUBTYPE_SH7786
+#include "ehci-sh.c"
+#define PLATFORM_DRIVER ehci_hcd_sh_driver
+#endif
+
#ifdef CONFIG_SOC_AU1200
#include "ehci-au1xxx.c"
#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
new file mode 100644
index 0000000..430b72e
--- /dev/null
+++ b/drivers/usb/host/ehci-sh.c
@@ -0,0 +1,232 @@
+/*
+ * SuperH EHCI host controller driver
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * Based on ohci-sh.c and ehci-atmel.c.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+struct ehci_sh_priv {
+ struct clk *iclk, *fclk;
+ struct usb_hcd *hcd;
+};
+
+static int ehci_sh_reset(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ int ret;
+
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
+ &ehci->caps->hc_capbase));
+
+ dbg_hcs_params(ehci, "reset");
+ dbg_hcc_params(ehci, "reset");
+
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+ ret = ehci_halt(ehci);
+ if (unlikely(ret))
+ return ret;
+
+ ret = ehci_init(hcd);
+ if (unlikely(ret))
+ return ret;
+
+ ehci->sbrn = 0x20;
+
+ ehci_reset(ehci);
+ ehci_port_power(ehci, 0);
+
+ return ret;
+}
+
+static const struct hc_driver ehci_sh_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "SuperH EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_USB2 | HCD_MEMORY,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ehci_sh_reset,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ehci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+
+#ifdef CONFIG_PM
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+#endif
+
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+};
+
+static int ehci_hcd_sh_probe(struct platform_device *pdev)
+{
+ const struct hc_driver *driver = &ehci_sh_hc_driver;
+ struct resource *res;
+ struct ehci_sh_priv *priv;
+ struct usb_hcd *hcd;
+ int irq, ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev,
+ "Found HC with no register addr. Check %s setup!\n",
+ dev_name(&pdev->dev));
+ ret = -ENODEV;
+ goto fail_create_hcd;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(&pdev->dev,
+ "Found HC with no IRQ. Check %s setup!\n",
+ dev_name(&pdev->dev));
+ ret = -ENODEV;
+ goto fail_create_hcd;
+ }
+
+ /* initialize hcd */
+ hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd) {
+ ret = -ENOMEM;
+ goto fail_create_hcd;
+ }
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+ driver->description)) {
+ dev_dbg(&pdev->dev, "controller already in use\n");
+ ret = -EBUSY;
+ goto fail_request_resource;
+ }
+
+ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
+ if (hcd->regs == NULL) {
+ dev_dbg(&pdev->dev, "error mapping memory\n");
+ ret = -ENXIO;
+ goto fail_ioremap;
+ }
+
+ priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
+ if (!priv) {
+ dev_dbg(&pdev->dev, "error allocating priv data\n");
+ ret = -ENOMEM;
+ goto fail_alloc;
+ }
+
+ /* These are optional, we don't care if they fail */
+ priv->fclk = clk_get(&pdev->dev, "usb_fck");
+ if (IS_ERR(priv->fclk))
+ priv->fclk = NULL;
+
+ priv->iclk = clk_get(&pdev->dev, "usb_ick");
+ if (IS_ERR(priv->iclk))
+ priv->iclk = NULL;
+
+ clk_enable(priv->fclk);
+ clk_enable(priv->iclk);
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to add hcd");
+ goto fail_add_hcd;
+ }
+
+ priv->hcd = hcd;
+ platform_set_drvdata(pdev, priv);
+
+ return ret;
+
+fail_add_hcd:
+ clk_disable(priv->iclk);
+ clk_disable(priv->fclk);
+
+ clk_put(priv->iclk);
+ clk_put(priv->fclk);
+
+ kfree(priv);
+fail_alloc:
+ iounmap(hcd->regs);
+fail_ioremap:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+ usb_put_hcd(hcd);
+fail_create_hcd:
+ dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
+
+ return ret;
+}
+
+static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
+{
+ struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = priv->hcd;
+
+ usb_remove_hcd(hcd);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+ platform_set_drvdata(pdev, NULL);
+
+ clk_disable(priv->fclk);
+ clk_disable(priv->iclk);
+
+ clk_put(priv->fclk);
+ clk_put(priv->iclk);
+
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver ehci_hcd_sh_driver = {
+ .probe = ehci_hcd_sh_probe,
+ .remove = __exit_p(ehci_hcd_sh_remove),
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "sh_ehci",
+ .owner = THIS_MODULE,
+ },
+};
+
+MODULE_ALIAS("platform:sh_ehci");
--
1.7.3.2
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