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[PATCH 06/10] Alchemy: Au1300 USB support

To: ralf@linux-mips.org, linux-mips@linux-mips.org
Subject: [PATCH 06/10] Alchemy: Au1300 USB support
From: Kevin Hickey <khickey@rmicorp.com>
Date: Fri, 6 Mar 2009 10:20:05 -0600
Cc: Kevin Hickey <khickey@rmicorp.com>
In-reply-to: <394c116b9fa5bd1865ac21d11185f09e07bd2ab5.1236354153.git.khickey@rmicorp.com>
In-reply-to: <788248524efc28ba2608ed79bfb7080ee476b12d.1236354153.git.khickey@rmicorp.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <> <1236356409-32357-1-git-send-email-khickey@rmicorp.com> <788248524efc28ba2608ed79bfb7080ee476b12d.1236354153.git.khickey@rmicorp.com> <0b447f7e26be90a9179bdf89ca2cfd1f34c5d16e.1236354153.git.khickey@rmicorp.com> <7afc5c84989c4bc0f94181397369f284f2bb6924.1236354153.git.khickey@rmicorp.com> <0946334bbaf9883076889fe060a362b72d31e6f4.1236354153.git.khickey@rmicorp.com> <394c116b9fa5bd1865ac21d11185f09e07bd2ab5.1236354153.git.khickey@rmicorp.com>
References: <788248524efc28ba2608ed79bfb7080ee476b12d.1236354153.git.khickey@rmicorp.com>
Sender: linux-mips-bounce@linux-mips.org
Adds support for USB 2.0 on the Au1300 SOC.

Signed-off-by: Kevin Hickey <khickey@rmicorp.com>
---
 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@rmicorp.com>
+ *
+ *  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


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