327 lines
7.9 KiB
Diff
327 lines
7.9 KiB
Diff
From 4365ef4ae6c7c08950ac34c47f7beaece2dc48ea Mon Sep 17 00:00:00 2001
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From: Lars-Peter Clausen <lars@metafoo.de>
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Date: Sun, 1 Aug 2010 21:13:26 +0200
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Subject: [PATCH] USB: Add JZ4740 OHCI support
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Add OHCI glue code for JZ4740 SoCs OHCI module.
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Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
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Cc: Greg Kroah-Hartman <gregkh@suse.de>
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Cc: David Brownell <dbrownell@users.sourceforge.net>
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Cc: linux-usb@vger.kernel.org
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Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
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Cc: linux-mips@linux-mips.org
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Cc: linux-kernel@vger.kernel.org
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Patchwork: https://patchwork.linux-mips.org/patch/1411/
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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---
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drivers/usb/Kconfig | 1 +
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drivers/usb/host/ohci-hcd.c | 5 +
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drivers/usb/host/ohci-jz4740.c | 276 ++++++++++++++++++++++++++++++++++++++++
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3 files changed, 282 insertions(+), 0 deletions(-)
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create mode 100644 drivers/usb/host/ohci-jz4740.c
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--- a/drivers/usb/Kconfig
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+++ b/drivers/usb/Kconfig
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@@ -46,6 +46,7 @@ config USB_ARCH_HAS_OHCI
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default y if PPC_MPC52xx
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# MIPS:
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default y if SOC_AU1X00
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+ default y if MACH_JZ4740
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# SH:
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default y if CPU_SUBTYPE_SH7720
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default y if CPU_SUBTYPE_SH7721
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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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@@ -1095,6 +1095,11 @@ MODULE_LICENSE ("GPL");
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#define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
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#endif
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+#ifdef CONFIG_MACH_JZ4740
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+#include "ohci-jz4740.c"
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+#define PLATFORM_DRIVER ohci_hcd_jz4740_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-jz4740.c
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@@ -0,0 +1,276 @@
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+/*
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+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.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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+ * You should have received a copy of the GNU General Public License along
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+ * with this program; if not, write to the Free Software Foundation, Inc.,
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+ * 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ */
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+
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+#include <linux/platform_device.h>
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+#include <linux/clk.h>
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+#include <linux/regulator/consumer.h>
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+
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+struct jz4740_ohci_hcd {
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+ struct ohci_hcd ohci_hcd;
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+
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+ struct regulator *vbus;
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+ bool vbus_enabled;
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+ struct clk *clk;
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+};
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+
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+static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
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+{
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+ return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
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+}
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+
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+static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd *jz4740_ohci)
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+{
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+ return container_of((void *)jz4740_ohci, struct usb_hcd, hcd_priv);
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+}
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+
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+static int ohci_jz4740_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 ret;
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+
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+ ret = ohci_init(ohci);
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+ if (ret < 0)
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+ return ret;
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+
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+ ohci->num_ports = 1;
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+
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+ ret = ohci_run(ohci);
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+ if (ret < 0) {
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+ dev_err(hcd->self.controller, "Can not start %s",
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+ hcd->self.bus_name);
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+ ohci_stop(hcd);
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+ return ret;
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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_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
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+ bool enabled)
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+{
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+ int ret = 0;
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+
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+ if (!jz4740_ohci->vbus)
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+ return 0;
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+
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+ if (enabled && !jz4740_ohci->vbus_enabled) {
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+ ret = regulator_enable(jz4740_ohci->vbus);
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+ if (ret)
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+ dev_err(jz4740_hcd_to_hcd(jz4740_ohci)->self.controller,
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+ "Could not power vbus\n");
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+ } else if (!enabled && jz4740_ohci->vbus_enabled) {
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+ ret = regulator_disable(jz4740_ohci->vbus);
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+ }
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+
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+ if (ret == 0)
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+ jz4740_ohci->vbus_enabled = enabled;
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+
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+ return ret;
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+}
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+
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+static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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+ u16 wIndex, char *buf, u16 wLength)
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+{
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+ struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
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+ int ret;
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+
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+ switch (typeReq) {
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+ case SetHubFeature:
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+ if (wValue == USB_PORT_FEAT_POWER)
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+ ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
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+ break;
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+ case ClearHubFeature:
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+ if (wValue == USB_PORT_FEAT_POWER)
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+ ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
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+ break;
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+ }
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+
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+ if (ret)
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+ return ret;
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+
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+ return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
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+}
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+
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+
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+static const struct hc_driver ohci_jz4740_hc_driver = {
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+ .description = hcd_name,
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+ .product_desc = "JZ4740 OHCI",
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+ .hcd_priv_size = sizeof(struct jz4740_ohci_hcd),
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+
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+ /*
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+ * generic hardware linkage
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+ */
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+ .irq = ohci_irq,
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+ .flags = HCD_USB11 | HCD_MEMORY,
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+
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+ /*
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+ * basic lifecycle operations
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+ */
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+ .start = ohci_jz4740_start,
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+ .stop = ohci_stop,
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+ .shutdown = ohci_shutdown,
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+
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+ /*
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+ * managing i/o requests and associated device resources
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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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+ /*
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+ * scheduling support
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+ */
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+ .get_frame_number = ohci_get_frame,
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+
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+ /*
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+ * root hub support
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+ */
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+ .hub_status_data = ohci_hub_status_data,
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+ .hub_control = ohci_jz4740_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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+ .start_port_reset = ohci_start_port_reset,
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+};
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+
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+
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+static __devinit int jz4740_ohci_probe(struct platform_device *pdev)
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+{
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+ int ret;
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+ struct usb_hcd *hcd;
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+ struct jz4740_ohci_hcd *jz4740_ohci;
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+ struct resource *res;
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+ int irq;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+
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+ if (!res) {
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+ dev_err(&pdev->dev, "Failed to get platform resource\n");
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+ return -ENOENT;
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+ }
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+
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+ irq = platform_get_irq(pdev, 0);
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+ if (irq < 0) {
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+ dev_err(&pdev->dev, "Failed to get platform irq\n");
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+ return irq;
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+ }
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+
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+ hcd = usb_create_hcd(&ohci_jz4740_hc_driver, &pdev->dev, "jz4740");
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+ if (!hcd) {
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+ dev_err(&pdev->dev, "Failed to create hcd.\n");
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+ return -ENOMEM;
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+ }
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+
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+ jz4740_ohci = hcd_to_jz4740_hcd(hcd);
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+
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+ res = request_mem_region(res->start, resource_size(res), hcd_name);
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+ if (!res) {
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+ dev_err(&pdev->dev, "Failed to request mem region.\n");
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+ ret = -EBUSY;
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+ goto err_free;
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+ }
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+
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+ hcd->rsrc_start = res->start;
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+ hcd->rsrc_len = resource_size(res);
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+ hcd->regs = ioremap(res->start, resource_size(res));
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+
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+ if (!hcd->regs) {
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+ dev_err(&pdev->dev, "Failed to ioremap registers.\n");
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+ ret = -EBUSY;
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+ goto err_release_mem;
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+ }
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+
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+ jz4740_ohci->clk = clk_get(&pdev->dev, "uhc");
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+ if (IS_ERR(jz4740_ohci->clk)) {
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+ ret = PTR_ERR(jz4740_ohci->clk);
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+ dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
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+ goto err_iounmap;
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+ }
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+
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+ jz4740_ohci->vbus = regulator_get(&pdev->dev, "vbus");
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+ if (IS_ERR(jz4740_ohci->vbus))
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+ jz4740_ohci->vbus = NULL;
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+
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+
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+ clk_set_rate(jz4740_ohci->clk, 48000000);
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+ clk_enable(jz4740_ohci->clk);
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+ if (jz4740_ohci->vbus)
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+ ohci_jz4740_set_vbus_power(jz4740_ohci, true);
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+
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+ platform_set_drvdata(pdev, hcd);
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+
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+ ohci_hcd_init(hcd_to_ohci(hcd));
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+
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+ ret = usb_add_hcd(hcd, irq, 0);
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+ if (ret) {
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+ dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
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+ goto err_disable;
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+ }
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+
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+ return 0;
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+
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+err_disable:
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+ platform_set_drvdata(pdev, NULL);
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+ if (jz4740_ohci->vbus) {
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+ regulator_disable(jz4740_ohci->vbus);
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+ regulator_put(jz4740_ohci->vbus);
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+ }
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+ clk_disable(jz4740_ohci->clk);
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+
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+ clk_put(jz4740_ohci->clk);
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+err_iounmap:
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+ iounmap(hcd->regs);
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+err_release_mem:
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+ release_mem_region(res->start, resource_size(res));
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+err_free:
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+ usb_put_hcd(hcd);
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+
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+ return ret;
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+}
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+
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+static __devexit int jz4740_ohci_remove(struct platform_device *pdev)
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+{
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+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
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+ struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
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+
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+ usb_remove_hcd(hcd);
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+
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+ platform_set_drvdata(pdev, NULL);
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+
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+ if (jz4740_ohci->vbus) {
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+ regulator_disable(jz4740_ohci->vbus);
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+ regulator_put(jz4740_ohci->vbus);
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+ }
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+
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+ clk_disable(jz4740_ohci->clk);
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+ clk_put(jz4740_ohci->clk);
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+
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+ iounmap(hcd->regs);
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+
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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 struct platform_driver ohci_hcd_jz4740_driver = {
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+ .probe = jz4740_ohci_probe,
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+ .remove = __devexit_p(jz4740_ohci_remove),
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+ .driver = {
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+ .name = "jz4740-ohci",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+MODULE_ALIAS("platfrom:jz4740-ohci");
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