The Atheros AR71XX/AR724X/AR913X SoCs have a built-in EHCI controller.
This patch adds the necessary glue code to make the generic EHCI driver
usable for them.
Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
Signed-off-by: Imre Kaloz <kaloz@xxxxxxxxxxx>
Cc: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
---
Changes since RFC:
- don't use 'default y if SOC_*', select USB_ARCH_HAS_EHCI option in the
platform specific Kconfig file instead
- add missing 'ath79_ehci_platform.h' file
Changes since v1:
- rebased against 2.6.37-rc7
Changes since v2: ---
Changes since v3:
- rebased against 2.6.37-rc8
arch/mips/ath79/Kconfig | 3 +
.../include/asm/mach-ath79/ath79_ehci_platform.h | 18 ++
drivers/usb/host/Kconfig | 8 +
drivers/usb/host/ehci-ath79.c | 176 ++++++++++++++++++++
drivers/usb/host/ehci-hcd.c | 5 +
5 files changed, 210 insertions(+), 0 deletions(-)
create mode 100644 arch/mips/include/asm/mach-ath79/ath79_ehci_platform.h
create mode 100644 drivers/usb/host/ehci-ath79.c
diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index cd6c738..647f535 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -15,12 +15,15 @@ config ATH79_MACH_PB44
endmenu
config SOC_AR71XX
+ select USB_ARCH_HAS_EHCI
def_bool n
config SOC_AR724X
+ select USB_ARCH_HAS_EHCI
def_bool n
config SOC_AR913X
+ select USB_ARCH_HAS_EHCI
def_bool n
config ATH79_DEV_GPIO_BUTTONS
diff --git a/arch/mips/include/asm/mach-ath79/ath79_ehci_platform.h b/arch/mips/include/asm/mach-ath79/ath79_ehci_platform.h
new file mode 100644
index 0000000..6ee075f
--- /dev/null
+++ b/arch/mips/include/asm/mach-ath79/ath79_ehci_platform.h
@@ -0,0 +1,18 @@
+/*
+ * Platform data definition for Atheros AR71XX/AR913X EHCI controller
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@xxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef _ATH79_EHCI_PLATFORM_H
+#define _ATH79_EHCI_PLATFORM_H
+
+struct ath79_ehci_platform_data {
+ u8 is_ar913x;
+};
+
+#endif /* _ATH79_EHCI_PLATFORM_H */
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 6f4f8e6..3a2667a 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -147,6 +147,14 @@ config USB_W90X900_EHCI
---help---
Enables support for the W90X900 USB controller
+config USB_EHCI_ATH79
+ bool "EHCI support for AR71XX/AR724X/AR913X SoCs"
+ depends on USB_EHCI_HCD && ATH79
+ select USB_EHCI_ROOT_HUB_TT
+ ---help---
+ Enables support for the built-in EHCI controller present
+ on the Atheros AR71XX/AR724X/AR913X SoCs.
+
config USB_OXU210HP_HCD
tristate "OXU210HP HCD support"
depends on USB
diff --git a/drivers/usb/host/ehci-ath79.c b/drivers/usb/host/ehci-ath79.c
new file mode 100644
index 0000000..43a728f
--- /dev/null
+++ b/drivers/usb/host/ehci-ath79.c
@@ -0,0 +1,176 @@
+/*
+ * Bus Glue for Atheros AR71XX/AR913X built-in EHCI controller.
+ *
+ * Copyright (C) 2008-2010 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>
+#include <asm/mach-ath79/ath79_ehci_platform.h>
+
+static int ehci_ath79_init(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct ath79_ehci_platform_data *pdata;
+ int ret;
+
+ pdata = hcd->self.controller->platform_data;
+
+ if (pdata->is_ar913x) {
+ hcd->has_tt = 1;
+
+ ehci->caps = hcd->regs + 0x100;
+ ehci->regs = hcd->regs + 0x100 +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ } else {
+ ehci->has_synopsys_hc_bug = 1;
+
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ }
+
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+ ehci->sbrn = 0x20;
+
+ ehci_reset(ehci);
+
+ ret = ehci_init(hcd);
+ if (ret)
+ return ret;
+
+ ehci_port_power(ehci, 0);
+
+ return 0;
+}
+
+static const struct hc_driver ehci_ath79_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Atheros built-in EHCI controller",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ .reset = ehci_ath79_init,
+ .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,
+#ifdef CONFIG_PM
+ .hub_suspend = ehci_hub_suspend,
+ .hub_resume = ehci_hub_resume,
+#endif
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_ath79_probe(struct platform_device *pdev)
+{
+ struct ath79_ehci_platform_data *pdata;
+ struct usb_hcd *hcd;
+ struct resource *res;
+ int irq;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_dbg(&pdev->dev, "no platform data specified for %s\n",
+ dev_name(&pdev->dev));
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
+ dev_name(&pdev->dev));
+ return -ENODEV;
+ }
+ irq = res->start;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no base address specified for %s\n",
+ dev_name(&pdev->dev));
+ return -ENODEV;
+ }
+
+ hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ 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;
+ }
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+ if (ret)
+ goto err_iounmap;
+
+ return 0;
+
+err_iounmap:
+ 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 ehci_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 ehci_ath79_driver = {
+ .probe = ehci_ath79_probe,
+ .remove = ehci_ath79_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ath79-ehci",
+ }
+};
+
+MODULE_ALIAS("platform:ath79-ehci");
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index e906280..b1313af 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1216,6 +1216,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_octeon_driver
#endif
+#ifdef CONFIG_USB_EHCI_ATH79
+#include "ehci-ath79.c"
+#define PLATFORM_DRIVER ehci_ath79_driver
+#endif
+
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
!defined(XILINX_OF_PLATFORM_DRIVER)
--
1.7.2.1
