You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
266 lines
6.5 KiB
Diff
266 lines
6.5 KiB
Diff
From 2ade1c32109d2f17fdfc0b414411d4ee7f828706 Mon Sep 17 00:00:00 2001
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Date: Sat, 26 Nov 2011 21:28:56 +0100
|
|
Subject: [PATCH 18/30] USB: EHCI: Add a generic platform device driver
|
|
|
|
This adds a generic driver for platform devices. It works like the PCI
|
|
driver and is based on it. This is for devices which do not have an own
|
|
bus but their EHCI controller works like a PCI controller. It will be
|
|
used for the Broadcom bcma and ssb USB EHCI controller.
|
|
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
|
---
|
|
drivers/usb/host/Kconfig | 10 ++
|
|
drivers/usb/host/ehci-hcd.c | 5 +
|
|
drivers/usb/host/ehci-platform.c | 211 ++++++++++++++++++++++++++++++++++++++
|
|
3 files changed, 226 insertions(+), 0 deletions(-)
|
|
create mode 100644 drivers/usb/host/ehci-platform.c
|
|
|
|
--- a/drivers/usb/host/Kconfig
|
|
+++ b/drivers/usb/host/Kconfig
|
|
@@ -388,6 +388,16 @@ config USB_OHCI_HCD_PLATFORM
|
|
|
|
If unsure, say N.
|
|
|
|
+config USB_EHCI_HCD_PLATFORM
|
|
+ bool "Generic EHCI driver for a platform device"
|
|
+ depends on USB_EHCI_HCD && EXPERIMENTAL
|
|
+ default n
|
|
+ ---help---
|
|
+ Adds an EHCI host driver for a generic platform device, which
|
|
+ provieds a memory space and an irq.
|
|
+
|
|
+ If unsure, say N.
|
|
+
|
|
config USB_OHCI_BIG_ENDIAN_DESC
|
|
bool
|
|
depends on USB_OHCI_HCD
|
|
--- a/drivers/usb/host/ehci-hcd.c
|
|
+++ b/drivers/usb/host/ehci-hcd.c
|
|
@@ -1329,6 +1329,11 @@ MODULE_LICENSE ("GPL");
|
|
#define PLATFORM_DRIVER ehci_xls_driver
|
|
#endif
|
|
|
|
+#ifdef CONFIG_USB_EHCI_HCD_PLATFORM
|
|
+#include "ehci-platform.c"
|
|
+#define PLATFORM_DRIVER ehci_platform_driver
|
|
+#endif
|
|
+
|
|
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
|
|
!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
|
|
!defined(XILINX_OF_PLATFORM_DRIVER)
|
|
--- /dev/null
|
|
+++ b/drivers/usb/host/ehci-platform.c
|
|
@@ -0,0 +1,211 @@
|
|
+/*
|
|
+ * Generic platform ehci driver
|
|
+ *
|
|
+ * Copyright 2007 Steven Brown <sbrown@cortland.com>
|
|
+ * Copyright 2010-2011 Hauke Mehrtens <hauke@hauke-m.de>
|
|
+ *
|
|
+ * Derived from the ohci-ssb driver
|
|
+ * Copyright 2007 Michael Buesch <mb@bu3sch.de>
|
|
+ *
|
|
+ * Derived from the EHCI-PCI driver
|
|
+ * Copyright (c) 2000-2004 by David Brownell
|
|
+ *
|
|
+ * Derived from the ohci-pci driver
|
|
+ * Copyright 1999 Roman Weissgaerber
|
|
+ * Copyright 2000-2002 David Brownell
|
|
+ * Copyright 1999 Linus Torvalds
|
|
+ * Copyright 1999 Gregory P. Smith
|
|
+ *
|
|
+ * Licensed under the GNU/GPL. See COPYING for details.
|
|
+ */
|
|
+#include <linux/platform_device.h>
|
|
+
|
|
+static int ehci_platform_reset(struct usb_hcd *hcd)
|
|
+{
|
|
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
+ int retval;
|
|
+
|
|
+ ehci->caps = hcd->regs;
|
|
+ ehci->regs = hcd->regs +
|
|
+ HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
|
|
+
|
|
+ dbg_hcs_params(ehci, "reset");
|
|
+ dbg_hcc_params(ehci, "reset");
|
|
+
|
|
+ /* cache this readonly data; minimize chip reads */
|
|
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
|
|
+
|
|
+ retval = ehci_halt(ehci);
|
|
+ if (retval)
|
|
+ return retval;
|
|
+
|
|
+ /* data structure init */
|
|
+ retval = ehci_init(hcd);
|
|
+ if (retval)
|
|
+ return retval;
|
|
+
|
|
+ ehci_reset(ehci);
|
|
+
|
|
+ ehci_port_power(ehci, 1);
|
|
+
|
|
+ return retval;
|
|
+}
|
|
+
|
|
+static const struct hc_driver ehci_platform_hc_driver = {
|
|
+ .description = "platform-usb-ehci",
|
|
+ .product_desc = "Generic Platform EHCI Controller",
|
|
+ .hcd_priv_size = sizeof(struct ehci_hcd),
|
|
+
|
|
+ .irq = ehci_irq,
|
|
+ .flags = HCD_MEMORY | HCD_USB2,
|
|
+
|
|
+ .reset = ehci_platform_reset,
|
|
+ .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,
|
|
+#if defined(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,
|
|
+
|
|
+ .update_device = ehci_update_device,
|
|
+
|
|
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
|
+};
|
|
+
|
|
+static int ehci_platform_attach(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd;
|
|
+ struct resource *res_irq, *res_mem;
|
|
+ int err = -ENOMEM;
|
|
+
|
|
+ hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
|
|
+ dev_name(&dev->dev));
|
|
+ if (!hcd)
|
|
+ goto err_return;
|
|
+
|
|
+ res_irq = platform_get_resource(dev, IORESOURCE_IRQ, 0);
|
|
+ if (!res_irq) {
|
|
+ err = -ENXIO;
|
|
+ goto err_return;
|
|
+ }
|
|
+ res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
+ if (!res_mem) {
|
|
+ err = -ENXIO;
|
|
+ goto err_return;
|
|
+ }
|
|
+ hcd->rsrc_start = res_mem->start;
|
|
+ hcd->rsrc_len = res_mem->end - res_mem->start + 1;
|
|
+
|
|
+ /*
|
|
+ * start & size modified per sbutils.c
|
|
+ */
|
|
+ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
|
|
+ if (!hcd->regs)
|
|
+ goto err_put_hcd;
|
|
+ err = usb_add_hcd(hcd, res_irq->start, IRQF_SHARED);
|
|
+ if (err)
|
|
+ goto err_iounmap;
|
|
+
|
|
+ platform_set_drvdata(dev, hcd);
|
|
+
|
|
+ return err;
|
|
+
|
|
+err_iounmap:
|
|
+ iounmap(hcd->regs);
|
|
+err_put_hcd:
|
|
+ usb_put_hcd(hcd);
|
|
+err_return:
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int ehci_platform_probe(struct platform_device *dev)
|
|
+{
|
|
+ int err;
|
|
+
|
|
+ if (usb_disabled())
|
|
+ return -ENODEV;
|
|
+
|
|
+ err = ehci_platform_attach(dev);
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int ehci_platform_remove(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd;
|
|
+
|
|
+ hcd = platform_get_drvdata(dev);
|
|
+ if (!hcd)
|
|
+ return -ENODEV;
|
|
+
|
|
+ usb_remove_hcd(hcd);
|
|
+ iounmap(hcd->regs);
|
|
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
+ usb_put_hcd(hcd);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void ehci_platform_shutdown(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd;
|
|
+
|
|
+ hcd = platform_get_drvdata(dev);
|
|
+ if (!hcd)
|
|
+ return;
|
|
+
|
|
+ if (hcd->driver->shutdown)
|
|
+ hcd->driver->shutdown(hcd);
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_PM
|
|
+
|
|
+static int ehci_platform_suspend(struct platform_device *dev,
|
|
+ pm_message_t state)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ehci_platform_resume(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
+
|
|
+ ehci_finish_controller_resume(hcd);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#else /* !CONFIG_PM */
|
|
+#define ehci_platform_suspend NULL
|
|
+#define ehci_platform_resume NULL
|
|
+#endif /* CONFIG_PM */
|
|
+
|
|
+static const struct platform_device_id ehci_platform_table[] = {
|
|
+ { "ehci-platform", 0 },
|
|
+ { }
|
|
+};
|
|
+MODULE_DEVICE_TABLE(platform, ehci_platform_table);
|
|
+
|
|
+static struct platform_driver ehci_platform_driver = {
|
|
+ .id_table = ehci_platform_table,
|
|
+ .probe = ehci_platform_probe,
|
|
+ .remove = ehci_platform_remove,
|
|
+ .shutdown = ehci_platform_shutdown,
|
|
+ .suspend = ehci_platform_suspend,
|
|
+ .resume = ehci_platform_resume,
|
|
+ .driver = {
|
|
+ .name = "ehci-platform",
|
|
+ }
|
|
+};
|