294 lines
7.9 KiB
Diff
294 lines
7.9 KiB
Diff
From be77ba57151bd35ce63ccf52d74b6c626fa73817 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Tue, 13 Mar 2012 01:04:47 +0100
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Subject: [PATCH 01/47] USB: OHCI: Add a generic platform device driver
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This adds a generic driver for platform devices. It works like the PCI
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driver and is based on it. This is for devices which do not have an own
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bus but their OHCI controller works like a PCI controller. It will be
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used for the Broadcom bcma and ssb USB OHCI controller.
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Acked-by: Alan Stern <stern@rowland.harvard.edu>
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/usb/host/Kconfig | 10 ++
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drivers/usb/host/ohci-hcd.c | 5 +
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drivers/usb/host/ohci-platform.c | 194 ++++++++++++++++++++++++++++++++++++++
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include/linux/usb/ohci_pdriver.h | 38 ++++++++
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4 files changed, 247 insertions(+), 0 deletions(-)
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create mode 100644 drivers/usb/host/ohci-platform.c
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create mode 100644 include/linux/usb/ohci_pdriver.h
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--- a/drivers/usb/host/Kconfig
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+++ b/drivers/usb/host/Kconfig
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@@ -393,6 +393,16 @@ config USB_CNS3XXX_OHCI
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Enable support for the CNS3XXX SOC's on-chip OHCI controller.
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It is needed for low-speed USB 1.0 device support.
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+config USB_OHCI_HCD_PLATFORM
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+ bool "Generic OHCI driver for a platform device"
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+ depends on USB_OHCI_HCD && EXPERIMENTAL
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+ default n
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+ ---help---
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+ Adds an OHCI host driver for a generic platform device, which
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+ provieds a memory space and an irq.
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+
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+ If unsure, say N.
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+
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config USB_OHCI_BIG_ENDIAN_DESC
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bool
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depends on USB_OHCI_HCD
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--- a/drivers/usb/host/ohci-hcd.c
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+++ b/drivers/usb/host/ohci-hcd.c
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@@ -1121,6 +1121,11 @@ MODULE_LICENSE ("GPL");
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#define PLATFORM_DRIVER ohci_xls_driver
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#endif
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+#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
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+#include "ohci-platform.c"
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+#define PLATFORM_DRIVER ohci_platform_driver
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+#endif
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+
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#if !defined(PCI_DRIVER) && \
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!defined(PLATFORM_DRIVER) && \
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!defined(OMAP1_PLATFORM_DRIVER) && \
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--- /dev/null
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+++ b/drivers/usb/host/ohci-platform.c
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@@ -0,0 +1,194 @@
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+/*
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+ * Generic platform ohci driver
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+ *
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+ * Copyright 2007 Michael Buesch <m@bues.ch>
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+ * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
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+ *
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+ * Derived from the OCHI-SSB driver
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+ * Derived from the OHCI-PCI driver
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+ * Copyright 1999 Roman Weissgaerber
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+ * Copyright 2000-2002 David Brownell
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+ * Copyright 1999 Linus Torvalds
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+ * Copyright 1999 Gregory P. Smith
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+ *
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+ * Licensed under the GNU/GPL. See COPYING for details.
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+ */
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+#include <linux/platform_device.h>
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+#include <linux/usb/ohci_pdriver.h>
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+
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+static int ohci_platform_reset(struct usb_hcd *hcd)
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+{
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+ struct platform_device *pdev = to_platform_device(hcd->self.controller);
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+ struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
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+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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+ int err;
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+
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+ if (pdata->big_endian_desc)
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+ ohci->flags |= OHCI_QUIRK_BE_DESC;
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+ if (pdata->big_endian_mmio)
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+ ohci->flags |= OHCI_QUIRK_BE_MMIO;
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+ if (pdata->no_big_frame_no)
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+ ohci->flags |= OHCI_QUIRK_FRAME_NO;
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+
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+ ohci_hcd_init(ohci);
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+ err = ohci_init(ohci);
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+
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+ return err;
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+}
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+
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+static int ohci_platform_start(struct usb_hcd *hcd)
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+{
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+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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+ int err;
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+
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+ err = ohci_run(ohci);
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+ if (err < 0) {
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+ ohci_err(ohci, "can't start\n");
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+ ohci_stop(hcd);
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+ }
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+
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+ return err;
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+}
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+
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+static const struct hc_driver ohci_platform_hc_driver = {
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+ .description = hcd_name,
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+ .product_desc = "Generic Platform OHCI Controller",
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+ .hcd_priv_size = sizeof(struct ohci_hcd),
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+
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+ .irq = ohci_irq,
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+ .flags = HCD_MEMORY | HCD_USB11,
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+
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+ .reset = ohci_platform_reset,
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+ .start = ohci_platform_start,
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+ .stop = ohci_stop,
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+ .shutdown = ohci_shutdown,
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+
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+ .urb_enqueue = ohci_urb_enqueue,
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+ .urb_dequeue = ohci_urb_dequeue,
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+ .endpoint_disable = ohci_endpoint_disable,
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+
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+ .get_frame_number = ohci_get_frame,
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+
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+ .hub_status_data = ohci_hub_status_data,
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+ .hub_control = ohci_hub_control,
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+#ifdef CONFIG_PM
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+ .bus_suspend = ohci_bus_suspend,
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+ .bus_resume = ohci_bus_resume,
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+#endif
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+
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+ .start_port_reset = ohci_start_port_reset,
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+};
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+
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+static int __devinit ohci_platform_probe(struct platform_device *dev)
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+{
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+ struct usb_hcd *hcd;
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+ struct resource *res_mem;
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+ int irq;
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+ int err = -ENOMEM;
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+
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+ BUG_ON(!dev->dev.platform_data);
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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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+ irq = platform_get_irq(dev, 0);
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+ if (irq < 0) {
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+ pr_err("no irq provieded");
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+ return irq;
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+ }
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+
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+ res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
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+ if (!res_mem) {
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+ pr_err("no memory recourse provieded");
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+ return -ENXIO;
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+ }
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+
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+ hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
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+ dev_name(&dev->dev));
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+ if (!hcd)
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+ return -ENOMEM;
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+
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+ hcd->rsrc_start = res_mem->start;
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+ hcd->rsrc_len = resource_size(res_mem);
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+
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+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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+ pr_err("controller already in use");
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+ err = -EBUSY;
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+ goto err_put_hcd;
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+ }
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+
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+ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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+ if (!hcd->regs)
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+ goto err_release_region;
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+ err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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+ if (err)
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+ goto err_iounmap;
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+
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+ platform_set_drvdata(dev, hcd);
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+
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+ return err;
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+
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+err_iounmap:
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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 err;
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+}
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+
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+static int __devexit ohci_platform_remove(struct platform_device *dev)
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+{
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+ struct usb_hcd *hcd = platform_get_drvdata(dev);
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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(dev, NULL);
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+
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+ return 0;
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+}
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+
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+#ifdef CONFIG_PM
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+
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+static int ohci_platform_suspend(struct device *dev)
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+{
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+ return 0;
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+}
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+
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+static int ohci_platform_resume(struct device *dev)
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+{
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+ struct usb_hcd *hcd = dev_get_drvdata(dev);
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+
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+ ohci_finish_controller_resume(hcd);
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+ return 0;
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+}
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+
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+#else /* !CONFIG_PM */
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+#define ohci_platform_suspend NULL
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+#define ohci_platform_resume NULL
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+#endif /* CONFIG_PM */
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+
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+static const struct platform_device_id ohci_platform_table[] = {
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+ { "ohci-platform", 0 },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(platform, ohci_platform_table);
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+
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+static const struct dev_pm_ops ohci_platform_pm_ops = {
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+ .suspend = ohci_platform_suspend,
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+ .resume = ohci_platform_resume,
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+};
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+
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+static struct platform_driver ohci_platform_driver = {
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+ .id_table = ohci_platform_table,
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+ .probe = ohci_platform_probe,
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+ .remove = __devexit_p(ohci_platform_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 = "ohci-platform",
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+ .pm = &ohci_platform_pm_ops,
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+ }
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+};
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--- /dev/null
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+++ b/include/linux/usb/ohci_pdriver.h
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@@ -0,0 +1,38 @@
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+/*
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+ * Copyright (C) 2012 Hauke Mehrtens <hauke@hauke-m.de>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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+ * for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software Foundation,
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+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ */
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+
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+#ifndef __USB_CORE_OHCI_PDRIVER_H
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+#define __USB_CORE_OHCI_PDRIVER_H
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+
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+/**
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+ * struct usb_ohci_pdata - platform_data for generic ohci driver
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+ *
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+ * @big_endian_desc: BE descriptors
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+ * @big_endian_mmio: BE registers
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+ * @no_big_frame_no: no big endian frame_no shift
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+ *
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+ * These are general configuration options for the OHCI controller. All of
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+ * these options are activating more or less workarounds for some hardware.
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+ */
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+struct usb_ohci_pdata {
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+ unsigned big_endian_desc:1;
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+ unsigned big_endian_mmio:1;
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+ unsigned no_big_frame_no:1;
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+};
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+
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+#endif /* __USB_CORE_OHCI_PDRIVER_H */
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