mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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292 lines
7.1 KiB
Diff
292 lines
7.1 KiB
Diff
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From 14297ee700e1c2e04a35466304f9a3c5e1387146 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sat, 26 Nov 2011 21:20:54 +0100
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Subject: [PATCH 17/30] 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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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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drivers/usb/host/Kconfig | 10 ++
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drivers/usb/host/ohci-hcd.c | 21 ++++-
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drivers/usb/host/ohci-platform.c | 197 ++++++++++++++++++++++++++++++++++++++
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3 files changed, 227 insertions(+), 1 deletions(-)
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create mode 100644 drivers/usb/host/ohci-platform.c
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--- a/drivers/usb/host/Kconfig
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+++ b/drivers/usb/host/Kconfig
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@@ -378,6 +378,16 @@ 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 "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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@@ -1116,6 +1116,11 @@ 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_OHCI_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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@@ -1125,7 +1130,8 @@ MODULE_LICENSE ("GPL");
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!defined(PS3_SYSTEM_BUS_DRIVER) && \
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!defined(SM501_OHCI_DRIVER) && \
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!defined(TMIO_OHCI_DRIVER) && \
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- !defined(SSB_OHCI_DRIVER)
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+ !defined(SSB_OHCI_DRIVER) && \
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+ !defined(PLATFORM_OHCI_DRIVER)
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#error "missing bus glue for ohci-hcd"
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#endif
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@@ -1209,9 +1215,19 @@ static int __init ohci_hcd_mod_init(void
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goto error_tmio;
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#endif
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+#ifdef PLATFORM_OHCI_DRIVER
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+ retval = platform_driver_register(&PLATFORM_OHCI_DRIVER);
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+ if (retval)
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+ goto error_platform;
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+#endif
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+
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return retval;
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/* Error path */
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+#ifdef PLATFORM_OHCI_DRIVER
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+ platform_driver_unregister(&PLATFORM_OHCI_DRIVER);
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+ error_platform:
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+#endif
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#ifdef TMIO_OHCI_DRIVER
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platform_driver_unregister(&TMIO_OHCI_DRIVER);
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error_tmio:
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@@ -1265,6 +1281,9 @@ module_init(ohci_hcd_mod_init);
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static void __exit ohci_hcd_mod_exit(void)
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{
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+#ifdef PLATFORM_OHCI_DRIVER
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+ platform_driver_unregister(&PLATFORM_OHCI_DRIVER);
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+#endif
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#ifdef TMIO_OHCI_DRIVER
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platform_driver_unregister(&TMIO_OHCI_DRIVER);
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#endif
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--- /dev/null
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+++ b/drivers/usb/host/ohci-platform.c
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@@ -0,0 +1,197 @@
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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 Hauke Mehrtens <hauke@hauke-m.de>
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+ *
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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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+
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+static int ohci_platform_reset(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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+ 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 = "platform-usb-ohci",
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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 ohci_platform_attach(struct platform_device *dev)
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+{
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+ struct usb_hcd *hcd;
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+ struct resource *res_irq, *res_mem;
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+ int err = -ENOMEM;
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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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+ goto err_return;
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+
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+ res_irq = platform_get_resource(dev, IORESOURCE_IRQ, 0);
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+ if (!res_irq) {
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+ err = -ENXIO;
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+ goto err_return;
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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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+ err = -ENXIO;
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+ goto err_return;
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+ }
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+ hcd->rsrc_start = res_mem->start;
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+ hcd->rsrc_len = res_mem->end - res_mem->start + 1;
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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_put_hcd;
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+ err = usb_add_hcd(hcd, res_irq->start, 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_put_hcd:
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+ usb_put_hcd(hcd);
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+err_return:
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+ return err;
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+}
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+
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+static int ohci_platform_probe(struct platform_device *dev)
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+{
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+ int err;
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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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+ /* We currently always attach BCMA_DEV_USB11_HOSTDEV
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+ * as HOST OHCI. If we want to attach it as Client device,
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+ * we must branch here and call into the (yet to
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+ * be written) Client mode driver. Same for remove(). */
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+
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+ err = ohci_platform_attach(dev);
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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_remove(struct platform_device *dev)
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+{
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+ struct usb_hcd *hcd;
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+
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+ hcd = platform_get_drvdata(dev);
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+ if (!hcd)
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+ return -ENODEV;
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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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+
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+ return 0;
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+}
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+
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+static void ohci_platform_shutdown(struct platform_device *dev)
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+{
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+ struct usb_hcd *hcd;
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+
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+ hcd = platform_get_drvdata(dev);
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+ if (!hcd)
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+ return;
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+
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+ if (hcd->driver->shutdown)
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+ hcd->driver->shutdown(hcd);
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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 platform_device *dev,
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+ pm_message_t state)
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+{
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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 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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+ 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 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 = ohci_platform_remove,
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+ .shutdown = ohci_platform_shutdown,
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+ .suspend = ohci_platform_suspend,
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+ .resume = ohci_platform_resume,
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+ .driver = {
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+ .name = "ohci-platform",
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+ }
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+};
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