The Atheros AR71XX/AR91XX 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: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
---
Changes since v1:
* remove XXX from the subject line because:
host vger.kernel.org[209.132.180.67] said: 550
5.7.1 Content-Policy reject msg: The capital Triple-X in subject
is way too often associated with junk email, please rephrase.
* fix a typo in the prompt of USB_EHCI_ATH79
* use (SOC_AR71XX || SOC_AR724X || SOC_AR913X) as a dependency
instead of ATH79
* add 'default y'
arch/mips/ath79/Kconfig | 3 +
drivers/usb/host/Kconfig | 9 ++
drivers/usb/host/ehci-ath79.c | 200 +++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/ehci-hcd.c | 5 +
4 files changed, 217 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ehci-ath79.c
diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index b058282..649a2a3 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -26,12 +26,15 @@ 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_AR913X_WMAC
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 9483acd..bcfe42c 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -202,6 +202,15 @@ config USB_CNS3XXX_EHCI
It is needed for high-speed (480Mbit/sec) USB 2.0 device
support.
+config USB_EHCI_ATH79
+ bool "EHCI support for AR7XXX/AR9XXX SoCs"
+ depends on USB_EHCI_HCD && (SOC_AR71XX || SOC_AR724X || SOC_AR913X)
+ select USB_EHCI_ROOT_HUB_TT
+ default y
+ ---help---
+ Enables support for the built-in EHCI controller present
+ on the Atheros AR7XXX/AR9XXX 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..74325b8
--- /dev/null
+++ b/drivers/usb/host/ehci-ath79.c
@@ -0,0 +1,200 @@
+/*
+ * Bus Glue for Atheros AR7XXX/AR9XXX built-in EHCI 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>
+
+enum {
+ EHCI_ATH79_IP_V1 = 0,
+ EHCI_ATH79_IP_V2,
+};
+
+static const struct platform_device_id ehci_ath79_id_table[] = {
+ {
+ .name = "ar71xx-ehci",
+ .driver_data = EHCI_ATH79_IP_V1,
+ },
+ {
+ .name = "ar724x-ehci",
+ .driver_data = EHCI_ATH79_IP_V2,
+ },
+ {
+ .name = "ar913x-ehci",
+ .driver_data = EHCI_ATH79_IP_V2,
+ },
+ {
+ /* terminating entry */
+ },
+};
+
+MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table);
+
+static int ehci_ath79_init(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct platform_device *pdev = to_platform_device(hcd->self.controller);
+ const struct platform_device_id *id;
+ int ret;
+
+ id = platform_get_device_id(pdev);
+ if (!id) {
+ dev_err(hcd->self.controller, "missing device id\n");
+ return -EINVAL;
+ }
+
+ switch (id->driver_data) {
+ case EHCI_ATH79_IP_V1:
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ break;
+
+ case EHCI_ATH79_IP_V2:
+ hcd->has_tt = 1;
+
+ ehci->caps = hcd->regs + 0x100;
+ ehci->regs = hcd->regs + 0x100 +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ break;
+
+ default:
+ BUG();
+ }
+
+ dbg_hcs_params(ehci, "reset");
+ dbg_hcc_params(ehci, "reset");
+ 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,
+
+ .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 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;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_dbg(&pdev->dev, "no base address specified\n");
+ 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,
+ .id_table = ehci_ath79_id_table,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ath79-ehci",
+ }
+};
+
+MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci");
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 78561d1..a29527d 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1265,6 +1265,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER tegra_ehci_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
