--- /dev/null
+/*
+ * Bus Glue for Atheros AR7XXX/AR9XXX built-in EHCI controller.
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Parts of this file are based on Atheros' 2.6.15 BSP
+ * Copyright (C) 2007 Atheros Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+
+enum {
+ EHCI_ATH79_IP_V1 = 0,
+ EHCI_ATH79_IP_V2,
+};
+
+static const struct platform_device_id ehci_ath79_id_table[] = {
+ {
+ .name = "ar71xx-ehci",
+ .driver_data = EHCI_ATH79_IP_V1,
+ },
+ {
+ .name = "ar724x-ehci",
+ .driver_data = EHCI_ATH79_IP_V2,
+ },
+ {
+ .name = "ar913x-ehci",
+ .driver_data = EHCI_ATH79_IP_V2,
+ },
+ {
+ /* terminating entry */
+ },
+};
+
+MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table);
+
+static int ehci_ath79_init(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct platform_device *pdev = to_platform_device(hcd->self.controller);
+ const struct platform_device_id *id;
+ int ret;
+
+ id = platform_get_device_id(pdev);
+ if (!id) {
+ dev_err(hcd->self.controller, "missing device id\n");
+ return -EINVAL;
+ }
+
+ switch (id->driver_data) {
+ case EHCI_ATH79_IP_V1:
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ break;
+
+ case EHCI_ATH79_IP_V2:
+ hcd->has_tt = 1;
+
+ ehci->caps = hcd->regs + 0x100;
+ ehci->regs = hcd->regs + 0x100 +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ break;
+
+ default:
+ BUG();
+ }
+
+ dbg_hcs_params(ehci, "reset");
+ dbg_hcc_params(ehci, "reset");
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+ ehci->sbrn = 0x20;
+
+ ehci_reset(ehci);
+
+ ret = ehci_init(hcd);
+ if (ret)
+ return ret;
+
+ ehci_port_power(ehci, 0);
+
+ return 0;
+}
+
+static const struct hc_driver ehci_ath79_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Atheros built-in EHCI controller",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ .reset = ehci_ath79_init,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+
+ .get_frame_number = ehci_get_frame,
+
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_ath79_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct resource *res;
+ int irq;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no IRQ specified\n");
+ return -ENODEV;
+ }
+ irq = res->start;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no base address specified\n");
+ return -ENODEV;
+ }
+
+ hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = res->end - res->start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ dev_dbg(&pdev->dev, "controller already in use\n");
+ ret = -EBUSY;
+ goto err_put_hcd;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ dev_dbg(&pdev->dev, "error mapping memory\n");
+ ret = -EFAULT;
+ goto err_release_region;
+ }
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+ if (ret)
+ goto err_iounmap;
+
+ return 0;
+
+err_iounmap:
+ iounmap(hcd->regs);
+
+err_release_region:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+static int ehci_ath79_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_remove_hcd(hcd);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+static struct platform_driver ehci_ath79_driver = {
+ .probe = ehci_ath79_probe,
+ .remove = ehci_ath79_remove,
+ .id_table = ehci_ath79_id_table,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ath79-ehci",
+ }
+};
+
+MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci");
projects / linux-beck.git / commitdiff