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path: root/drivers/usb/host/ehci-s5p.c
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Diffstat (limited to 'drivers/usb/host/ehci-s5p.c')
-rw-r--r--drivers/usb/host/ehci-s5p.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
new file mode 100644
index 00000000000..e3374c8f7b3
--- /dev/null
+++ b/drivers/usb/host/ehci-s5p.c
@@ -0,0 +1,202 @@
+/*
+ * SAMSUNG S5P USB HOST EHCI Controller
+ *
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ * Author: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <mach/regs-pmu.h>
+#include <plat/cpu.h>
+#include <plat/ehci.h>
+#include <plat/usb-phy.h>
+
+struct s5p_ehci_hcd {
+ struct device *dev;
+ struct usb_hcd *hcd;
+ struct clk *clk;
+};
+
+static const struct hc_driver s5p_ehci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "S5P EHCI Host Controller",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ .reset = ehci_init,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ .get_frame_number = ehci_get_frame,
+
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int __devinit s5p_ehci_probe(struct platform_device *pdev)
+{
+ struct s5p_ehci_platdata *pdata;
+ struct s5p_ehci_hcd *s5p_ehci;
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+ struct resource *res;
+ int irq;
+ int err;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "No platform data defined\n");
+ return -EINVAL;
+ }
+
+ s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
+ if (!s5p_ehci)
+ return -ENOMEM;
+
+ s5p_ehci->dev = &pdev->dev;
+
+ hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd) {
+ dev_err(&pdev->dev, "Unable to create HCD\n");
+ err = -ENOMEM;
+ goto fail_hcd;
+ }
+
+ s5p_ehci->clk = clk_get(&pdev->dev, "usbhost");
+
+ if (IS_ERR(s5p_ehci->clk)) {
+ dev_err(&pdev->dev, "Failed to get usbhost clock\n");
+ err = PTR_ERR(s5p_ehci->clk);
+ goto fail_clk;
+ }
+
+ err = clk_enable(s5p_ehci->clk);
+ if (err)
+ goto fail_clken;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get I/O memory\n");
+ err = -ENXIO;
+ goto fail_io;
+ }
+
+ 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 remap I/O memory\n");
+ err = -ENOMEM;
+ goto fail_io;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (!irq) {
+ dev_err(&pdev->dev, "Failed to get IRQ\n");
+ err = -ENODEV;
+ goto fail;
+ }
+
+ if (pdata->phy_init)
+ pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+
+ ehci = hcd_to_ehci(hcd);
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs +
+ HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
+
+ dbg_hcs_params(ehci, "reset");
+ dbg_hcc_params(ehci, "reset");
+
+ /* cache this readonly data; minimize chip reads */
+ ehci->hcs_params = readl(&ehci->caps->hcs_params);
+
+ err = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to add USB HCD\n");
+ goto fail;
+ }
+
+ platform_set_drvdata(pdev, s5p_ehci);
+
+ return 0;
+
+fail:
+ iounmap(hcd->regs);
+fail_io:
+ clk_disable(s5p_ehci->clk);
+fail_clken:
+ clk_put(s5p_ehci->clk);
+fail_clk:
+ usb_put_hcd(hcd);
+fail_hcd:
+ kfree(s5p_ehci);
+ return err;
+}
+
+static int __devexit s5p_ehci_remove(struct platform_device *pdev)
+{
+ struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
+ struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = s5p_ehci->hcd;
+
+ usb_remove_hcd(hcd);
+
+ if (pdata && pdata->phy_exit)
+ pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+
+ iounmap(hcd->regs);
+
+ clk_disable(s5p_ehci->clk);
+ clk_put(s5p_ehci->clk);
+
+ usb_put_hcd(hcd);
+ kfree(s5p_ehci);
+
+ return 0;
+}
+
+static void s5p_ehci_shutdown(struct platform_device *pdev)
+{
+ struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = s5p_ehci->hcd;
+
+ if (hcd->driver->shutdown)
+ hcd->driver->shutdown(hcd);
+}
+
+static struct platform_driver s5p_ehci_driver = {
+ .probe = s5p_ehci_probe,
+ .remove = __devexit_p(s5p_ehci_remove),
+ .shutdown = s5p_ehci_shutdown,
+ .driver = {
+ .name = "s5p-ehci",
+ .owner = THIS_MODULE,
+ }
+};
+
+MODULE_ALIAS("platform:s5p-ehci");