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authorGabor Juhos <juhosg@openwrt.org>2008-07-21 17:08:14 +0000
committerGabor Juhos <juhosg@openwrt.org>2008-07-21 17:08:14 +0000
commitf529a3742043a23da4f715c3664d5a822b1f970c (patch)
treea4cdaee84e23765d98072df25883f365cbc0d66a /target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c
parent3d9c4c9073deaf01d592d6940af21be81d92e88a (diff)
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surprise :p
SVN-Revision: 11894
Diffstat (limited to 'target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c')
-rw-r--r--target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c b/target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c
new file mode 100644
index 0000000000..7af7fafb78
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/usb/host/ohci-ar71xx.c
@@ -0,0 +1,200 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * Copyright (C) 2007 Atheros Communications, Inc.
+ * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Bus Glue for Atheros AR71xx built-in OHCI controller
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+extern int usb_disabled(void);
+
+static void ar71xx_start_ohci(struct platform_device *pdev)
+{
+}
+
+static void ar71xx_stop_ohci(struct platform_device *pdev)
+{
+ /*
+ * TODO: implement
+ */
+}
+
+int usb_hcd_ar71xx_probe(const struct hc_driver *driver,
+ struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct resource *res;
+ int irq;
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
+ pdev->dev.bus_id);
+ return -ENODEV;
+ }
+ irq = res->start;
+
+ hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
+ if (!hcd)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no base address specified for %s\n",
+ pdev->dev.bus_id);
+ ret = -ENODEV;
+ goto err_put_hcd;
+ }
+ 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;
+ }
+
+ ar71xx_start_ohci(pdev);
+ ohci_hcd_init(hcd_to_ohci(hcd));
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
+ if (ret)
+ goto err_stop_hcd;
+
+ return 0;
+
+err_stop_hcd:
+ ar71xx_stop_ohci(pdev);
+ iounmap(hcd->regs);
+err_release_region:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_ar71xx_remove - shutdown processing for AR71xx HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_ar71xx_probe(), first invoking
+ * the HCD's stop() method. It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_hcd_ar71xx_remove(struct usb_hcd *hcd, struct platform_device *pdev)
+{
+ usb_remove_hcd(hcd);
+ ar71xx_stop_ohci(pdev);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+}
+
+static int __devinit ohci_ar71xx_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_init(ohci);
+ if (ret < 0)
+ return ret;
+
+ ret = ohci_run(ohci);
+ if (ret < 0)
+ goto err;
+
+ return 0;
+
+err:
+ ohci_stop(hcd);
+ return ret;
+}
+
+static const struct hc_driver ohci_ar71xx_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Atheros AR71xx built-in OHCI controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY,
+
+ /*
+ * basic lifecycle operations
+ */
+ .start = ohci_ar71xx_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_hub_control,
+ .start_port_reset = ohci_start_port_reset,
+};
+
+static int ohci_hcd_ar71xx_drv_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = -ENODEV;
+ if (!usb_disabled())
+ ret = usb_hcd_ar71xx_probe(&ohci_ar71xx_hc_driver, pdev);
+
+ return ret;
+}
+
+static int ohci_hcd_ar71xx_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_hcd_ar71xx_remove(hcd, pdev);
+ return 0;
+}
+
+static struct platform_driver ohci_hcd_ar71xx_driver = {
+ .probe = ohci_hcd_ar71xx_drv_probe,
+ .remove = ohci_hcd_ar71xx_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "ar71xx-ohci",
+ .owner = THIS_MODULE,
+ },
+};
+
+MODULE_ALIAS("ar71xx-ohci");