Adds support for USB 2.0 on the Au1300 SOC.
Signed-off-by: Kevin Hickey <khickey@xxxxxxxxxxx>
---
drivers/usb/Kconfig | 1 +
drivers/usb/host/ehci-au13xx.c | 213 ++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/ehci-hcd.c | 5 +
3 files changed, 219 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/host/ehci-au13xx.c
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 83babb0..a50d053 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -55,6 +55,7 @@ config USB_ARCH_HAS_EHCI
boolean
default y if PPC_83xx
default y if SOC_AU1200
+ default y if SOC_AU13XX
default y if ARCH_IXP4XX
default PCI
diff --git a/drivers/usb/host/ehci-au13xx.c b/drivers/usb/host/ehci-au13xx.c
new file mode 100644
index 0000000..fe03667
--- /dev/null
+++ b/drivers/usb/host/ehci-au13xx.c
@@ -0,0 +1,213 @@
+/*
+ * Copyright 2008 RMI Corporation
+ * Author: Kevin Hickey <khickey@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Based on ehci-au1xxx.c.
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach-au1x00/au1000.h>
+
+
+extern int usb_disabled(void);
+
+static void au13xx_start_ehc(void)
+{
+ AU13XX_USB* au13xx_usb = (AU13XX_USB*)(KSEG1 | USB_BASE_PHYS_ADDR);
+ /*
+ * Enable clocks.
+ */
+ AU_SET_BITS_32(USB_DWC_CTRL3_EHC_CLKEN, &au13xx_usb->dwc_ctrl3);
+
+ /*
+ * Take the host controller block out of reset
+ */
+ AU_SET_BITS_32(USB_DWC_CTRL1_HSTRS, &au13xx_usb->dwc_ctrl1);
+
+ /*
+ * Enable all of the PHYs
+ */
+ AU_SET_BITS_32(USB_DWC_CTRL2_PHYRS | USB_DWC_CTRL2_PHY0RS | USB_DWC_CTRL2_PH1RS,
+ &au13xx_usb->dwc_ctrl2);
+
+ /*
+ * Enable interrupts
+ */
+ AU_SET_BITS_32(USB_INTR_EHCI, &au13xx_usb->intr_enable);
+
+ /*
+ * This bit enables coherent DMA.
+ */
+ AU_SET_BITS_32(USB_SBUS_CTRL_SBCA, &au13xx_usb->sbus_ctrl);
+ asm("sync");
+}
+
+static void au13xx_stop_ehc(void)
+{
+ AU13XX_USB* au13xx_usb = (AU13XX_USB*)(KSEG1 | USB_BASE_PHYS_ADDR);
+ /*
+ * Disable the EHCI interrupt
+ */
+ AU_CLEAR_BITS_32(USB_INTR_EHCI, &au13xx_usb->intr_enable);
+
+ /*
+ * Disable the clock to the EHCI block
+ */
+ AU_CLEAR_BITS_32(USB_DWC_CTRL3_EHC_CLKEN, &au13xx_usb->dwc_ctrl3);
+
+ /*
+ * Note: we're not disabling the PHY here because the OHCI and EHCI
+ * drivers share a PHY and the OHCI driver may still be active.
+ */
+}
+
+static const struct hc_driver ehci_au13xx_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Au13xx EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ehci_init,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ehci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+};
+
+static int ehci_hcd_au13xx_drv_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ if (pdev->resource[1].flags != IORESOURCE_IRQ) {
+ pr_debug("resource[1] is not IORESOURCE_IRQ");
+ return -ENOMEM;
+ }
+ hcd = usb_create_hcd(&ehci_au13xx_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = pdev->resource[0].start;
+ hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ pr_debug("request_mem_region failed");
+ ret = -EBUSY;
+ goto err1;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ pr_debug("ioremap failed");
+ ret = -ENOMEM;
+ goto err2;
+ }
+
+ au13xx_start_ehc();
+
+ ehci = hcd_to_ehci(hcd);
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
+ printk("ehci->regs = %p\n", ehci->regs);
+
+ /* cache this readonly data; minimize chip reads */
+ ehci->hcs_params = readl(&ehci->caps->hcs_params);
+
+ ret = usb_add_hcd(hcd, pdev->resource[1].start,
+ IRQF_DISABLED | IRQF_SHARED);
+ if (ret == 0) {
+ platform_set_drvdata(pdev, hcd);
+ return ret;
+ }
+
+ au13xx_stop_ehc();
+ iounmap(hcd->regs);
+err2:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+static int ehci_hcd_au13xx_drv_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);
+ au13xx_stop_ehc();
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver ehci_hcd_au13xx_driver = {
+ .probe = ehci_hcd_au13xx_drv_probe,
+ .remove = ehci_hcd_au13xx_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .suspend = NULL,
+ .resume = NULL,
+ .driver = {
+ .name = "au13xx-ehci",
+ .owner = THIS_MODULE,
+ }
+};
+
+MODULE_ALIAS("platform:au13xx-ehci");
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index e551bb3..1e4ca7e 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1016,6 +1016,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_hcd_au1xxx_driver
#endif
+#ifdef CONFIG_SOC_AU13XX
+#include "ehci-au13xx.c"
+#define PLATFORM_DRIVER ehci_hcd_au13xx_driver
+#endif
+
#ifdef CONFIG_PPC_PS3
#include "ehci-ps3.c"
#define PS3_SYSTEM_BUS_DRIVER ps3_ehci_driver
--
1.5.4.3
