214 lines
5.0 KiB
Diff
214 lines
5.0 KiB
Diff
--- /dev/null
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+++ b/drivers/usb/host/ehci-cns21xx.c
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@@ -0,0 +1,186 @@
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+/*
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+ * Copyright (c) 2008 Cavium Networks
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+ * Copyright (c) 2010-2012 Gabor Juhos <juhosg@openwrt.org>
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+ *
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+ * This file is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License, Version 2, as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/platform_device.h>
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+#include <linux/irq.h>
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+
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+#include <mach/cns21xx.h>
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+
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+#define DRIVER_NAME "cns21xx-ehci"
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+
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+static int cns21xx_ehci_reset(struct usb_hcd *hcd)
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+{
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+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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+ int ret;
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+
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+ ret = ehci_halt(ehci);
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+ if (ret)
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+ return ret;
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+
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+ ret = ehci_init(hcd);
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+ if (ret)
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+ return ret;
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+
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+ ehci_reset(ehci);
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+ ehci_port_power(ehci, 0);
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+
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+ return 0;
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+}
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+
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+static const struct hc_driver ehci_cns21xx_hc_driver = {
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+ .description = hcd_name,
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+ .product_desc = DRIVER_NAME,
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+ .hcd_priv_size = sizeof(struct ehci_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 = ehci_irq,
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+ .flags = HCD_MEMORY | HCD_USB2,
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+
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+ /*
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+ * basic lifecycle operations
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+ */
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+ .reset = cns21xx_ehci_reset,
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+ .start = ehci_run,
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+ .stop = ehci_stop,
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+ .shutdown = ehci_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 = ehci_urb_enqueue,
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+ .urb_dequeue = ehci_urb_dequeue,
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+ .endpoint_disable = ehci_endpoint_disable,
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+ .endpoint_reset = ehci_endpoint_reset,
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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 = ehci_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 = ehci_hub_status_data,
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+ .hub_control = ehci_hub_control,
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+ .relinquish_port = ehci_relinquish_port,
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+ .port_handed_over = ehci_port_handed_over,
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+
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+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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+};
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+
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+static void cns21xx_ehci_init_hc(void)
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+{
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+ __raw_writel(0x106, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x04);
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+ __raw_writel((3 << 5) | 0x2000, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x40);
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+ msleep(100);
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+}
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+
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+static int ehci_cns21xx_probe(struct platform_device *pdev)
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+{
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+ struct usb_hcd *hcd;
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+ struct ehci_hcd *ehci;
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+ struct resource *res;
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+ int irq;
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+ int ret;
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+
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+ if (usb_disabled())
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+ return -ENODEV;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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+ if (!res) {
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+ dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
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+ dev_name(&pdev->dev));
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+ return -ENODEV;
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+ }
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+ irq = res->start;
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+
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+ hcd = usb_create_hcd(&ehci_cns21xx_hc_driver, &pdev->dev,
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+ dev_name(&pdev->dev));
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+ if (!hcd)
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+ return -ENOMEM;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (!res) {
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+ dev_dbg(&pdev->dev, "no base address specified for %s\n",
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+ dev_name(&pdev->dev));
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+ ret = -ENODEV;
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+ goto err_put_hcd;
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+ }
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+ hcd->rsrc_start = res->start;
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+ hcd->rsrc_len = res->end - res->start + 1;
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+
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+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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+ dev_dbg(&pdev->dev, "controller already in use\n");
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+ ret = -EBUSY;
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+ goto err_put_hcd;
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+ }
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+
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+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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+ if (!hcd->regs) {
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+ dev_dbg(&pdev->dev, "error mapping memory\n");
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+ ret = -EFAULT;
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+ goto err_release_region;
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+ }
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+
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+ cns21xx_ehci_init_hc();
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+
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+ ehci = hcd_to_ehci(hcd);
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+
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+ ehci->caps = hcd->regs;
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+ ehci->regs = hcd->regs +
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+ HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
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+ dbg_hcs_params(ehci, "reset");
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+ dbg_hcc_params(ehci, "reset");
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+
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+ /* cache this readonly data; minimize chip reads */
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+ ehci->hcs_params = readl(&ehci->caps->hcs_params);
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+ ehci->sbrn = 0x20;
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+
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+ ret = usb_add_hcd(hcd, CNS21XX_IRQ_EHCI, IRQF_DISABLED);
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+ if (ret)
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+ goto err_unmap;
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+
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+ platform_set_drvdata(pdev, hcd);
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+ return 0;
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+
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+err_unmap:
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+ iounmap(hcd->regs);
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+err_release_region:
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+err_put_hcd:
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+ usb_put_hcd(hcd);
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+ return ret;
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+}
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+
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+static int ehci_cns21xx_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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+
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+ usb_remove_hcd(hcd);
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+ iounmap(hcd->regs);
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+ usb_put_hcd(hcd);
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+ platform_set_drvdata(pdev, NULL);
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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 ehci_cns21xx_driver = {
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+ .probe = ehci_cns21xx_probe,
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+ .remove = ehci_cns21xx_remove,
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+ .shutdown = usb_hcd_platform_shutdown,
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+ .driver = {
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+ .owner = THIS_MODULE,
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+ .name = DRIVER_NAME,
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+ },
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+};
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+
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+MODULE_ALIAS("platform:" DRIVER_NAME);
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--- a/drivers/usb/host/ehci-hcd.c
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+++ b/drivers/usb/host/ehci-hcd.c
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@@ -1376,6 +1376,11 @@ MODULE_LICENSE ("GPL");
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#define PLATFORM_DRIVER ehci_mv_driver
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#endif
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+#ifdef CONFIG_ARCH_CNS21XX
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+#include "ehci-cns21xx.c"
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+#define PLATFORM_DRIVER ehci_cns21xx_driver
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+#endif
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+
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#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
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!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
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!defined(XILINX_OF_PLATFORM_DRIVER)
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--- a/arch/arm/Kconfig
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+++ b/arch/arm/Kconfig
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@@ -369,6 +369,7 @@ config ARCH_CNS21XX
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select ARCH_REQUIRE_GPIOLIB
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select ARM_L1_CACHE_SHIFT_4
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select USB_ARCH_HAS_OHCI
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+ select USB_ARCH_HAS_EHCI
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help
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Support for Cavium Networks CNS21xx family.
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