The Atheros AR71XX/AR7240 SoCs have a built-in OHCI controller.
This patch adds the necessary glue code to make the generic OHCI
driver usable for them.
Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
Signed-off-by: Imre Kaloz <kaloz@xxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
---
Changes since v1: ---
arch/mips/ath79/Kconfig | 2 +
drivers/usb/host/Kconfig | 8 ++
drivers/usb/host/ohci-ath79.c | 151 +++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/ohci-hcd.c | 5 ++
4 files changed, 166 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ohci-ath79.c
diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index 649a2a3..4770741 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -27,10 +27,12 @@ endmenu
config SOC_AR71XX
select USB_ARCH_HAS_EHCI
+ select USB_ARCH_HAS_OHCI
def_bool n
config SOC_AR724X
select USB_ARCH_HAS_EHCI
+ select USB_ARCH_HAS_OHCI
def_bool n
config SOC_AR913X
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index bcfe42c..b95cbcc 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -296,6 +296,14 @@ config USB_OHCI_HCD_OMAP3
Enables support for the on-chip OHCI controller on
OMAP3 and later chips.
+config USB_OHCI_ATH79
+ bool "USB OHCI support for the Atheros AR71XX/AR7240 SoCs"
+ depends on USB_OHCI_HCD && (SOC_AR71XX || SOC_AR724X)
+ default y
+ help
+ Enables support for the built-in OHCI controller present on the
+ Atheros AR71XX/AR7240 SoCs.
+
config USB_OHCI_HCD_PPC_SOC
bool "OHCI support for on-chip PPC USB controller"
depends on USB_OHCI_HCD && (STB03xxx || PPC_MPC52xx)
diff --git a/drivers/usb/host/ohci-ath79.c b/drivers/usb/host/ohci-ath79.c
new file mode 100644
index 0000000..ffea3e7
--- /dev/null
+++ b/drivers/usb/host/ohci-ath79.c
@@ -0,0 +1,151 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * Bus Glue for Atheros AR71XX/AR724X built-in OHCI controller.
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@xxxxxxxxxxx>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@xxxxxxxxxxx>
+ *
+ * Parts of this file are based on Atheros' 2.6.15 BSP
+ * Copyright (C) 2007 Atheros Communications, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+
+static int __devinit ohci_ath79_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_ath79_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Atheros built-in OHCI controller",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY,
+
+ .start = ohci_ath79_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ .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_ath79_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct resource *res;
+ int irq;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no IRQ specified\n");
+ return -ENODEV;
+ }
+ irq = res->start;
+
+ hcd = usb_create_hcd(&ohci_ath79_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no base address specified\n");
+ 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;
+ }
+
+ 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:
+ iounmap(hcd->regs);
+err_release_region:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+static int ohci_ath79_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_remove_hcd(hcd);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+static struct platform_driver ohci_hcd_ath79_driver = {
+ .probe = ohci_ath79_probe,
+ .remove = ohci_ath79_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "ath79-ohci",
+ .owner = THIS_MODULE,
+ },
+};
+
+MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ohci");
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index e728863..8aec65f 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1105,6 +1105,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_hcd_cns3xxx_driver
#endif
+#ifdef CONFIG_USB_OHCI_ATH79
+#include "ohci-ath79.c"
+#define PLATFORM_DRIVER ohci_hcd_ath79_driver
+#endif
+
#if !defined(PCI_DRIVER) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
--
1.7.2.1
--
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