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[PATCH 2/2] USB: add Broadcom 63xx integrated EHCI controller support.

To: David Brownell <dbrownell@users.sourceforge.net>, linux-usb@vger.kernel.org
Subject: [PATCH 2/2] USB: add Broadcom 63xx integrated EHCI controller support.
From: Maxime Bizon <mbizon@freebox.fr>
Date: Sat, 30 Jan 2010 18:54:31 +0100
Cc: Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org, Maxime Bizon <mbizon@freebox.fr>
In-reply-to: <1264874071-28851-1-git-send-email-mbizon@freebox.fr>
References: <1264874071-28851-1-git-send-email-mbizon@freebox.fr>
Sender: linux-mips-bounce@linux-mips.org
Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
---
 drivers/usb/host/ehci-bcm63xx.c |  154 +++++++++++++++++++++++++++++++++++++++
 drivers/usb/host/ehci-hcd.c     |    5 +
 2 files changed, 159 insertions(+), 0 deletions(-)
 create mode 100644 drivers/usb/host/ehci-bcm63xx.c

diff --git a/drivers/usb/host/ehci-bcm63xx.c b/drivers/usb/host/ehci-bcm63xx.c
new file mode 100644
index 0000000..50638f7
--- /dev/null
+++ b/drivers/usb/host/ehci-bcm63xx.c
@@ -0,0 +1,154 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_io.h>
+
+static int ehci_bcm63xx_setup(struct usb_hcd *hcd)
+{
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+       int retval;
+
+       retval = ehci_halt(ehci);
+       if (retval)
+               return retval;
+
+       retval = ehci_init(hcd);
+       if (retval)
+               return retval;
+
+       ehci_reset(ehci);
+       ehci_port_power(ehci, 0);
+
+       return retval;
+}
+
+
+static const struct hc_driver ehci_bcm63xx_hc_driver = {
+       .description =          hcd_name,
+       .product_desc =         "BCM63XX integrated EHCI controller",
+       .hcd_priv_size =        sizeof(struct ehci_hcd),
+
+       .irq =                  ehci_irq,
+       .flags =                HCD_MEMORY | HCD_USB2,
+
+       .reset =                ehci_bcm63xx_setup,
+       .start =                ehci_run,
+       .stop =                 ehci_stop,
+       .shutdown =             ehci_shutdown,
+
+       .urb_enqueue =          ehci_urb_enqueue,
+       .urb_dequeue =          ehci_urb_dequeue,
+       .endpoint_disable =     ehci_endpoint_disable,
+
+       .get_frame_number =     ehci_get_frame,
+
+       .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 __devinit ehci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
+{
+       struct resource *res_mem;
+       struct usb_hcd *hcd;
+       struct ehci_hcd *ehci;
+       u32 reg;
+       int ret, irq;
+
+       res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       irq = platform_get_irq(pdev, 0);;
+       if (!res_mem || irq < 0)
+               return -ENODEV;
+
+       reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
+       reg &= ~USBH_PRIV_SWAP_EHCI_DATA_MASK;
+       reg |= USBH_PRIV_SWAP_EHCI_ENDN_MASK;
+       bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG);
+
+       /*
+        * The magic value comes for the original vendor BSP and is
+        * needed for USB to work. Datasheet does not help, so the
+        * magic value is used as-is.
+        */
+       bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG);
+
+       hcd = usb_create_hcd(&ehci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx");
+       if (!hcd)
+               return -ENOMEM;
+       hcd->rsrc_start = res_mem->start;
+       hcd->rsrc_len = res_mem->end - res_mem->start + 1;
+
+       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+               pr_debug("request_mem_region failed\n");
+               ret = -EBUSY;
+               goto out;
+       }
+
+       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+       if (!hcd->regs) {
+               pr_debug("ioremap failed\n");
+               ret = -EIO;
+               goto out1;
+       }
+
+       ehci = hcd_to_ehci(hcd);
+       ehci->big_endian_mmio = 1;
+       ehci->big_endian_desc = 0;
+       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;
+
+       ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
+       if (ret)
+               goto out2;
+
+       platform_set_drvdata(pdev, hcd);
+       return 0;
+
+out2:
+       iounmap(hcd->regs);
+out1:
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+out:
+       usb_put_hcd(hcd);
+       return ret;
+}
+
+static int __devexit ehci_hcd_bcm63xx_drv_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd;
+
+       hcd = platform_get_drvdata(pdev);
+       usb_remove_hcd(hcd);
+       iounmap(hcd->regs);
+       usb_put_hcd(hcd);
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+       platform_set_drvdata(pdev, NULL);
+       return 0;
+}
+
+static struct platform_driver ehci_hcd_bcm63xx_driver = {
+       .probe          = ehci_hcd_bcm63xx_drv_probe,
+       .remove         = __devexit_p(ehci_hcd_bcm63xx_drv_remove),
+       .shutdown       = usb_hcd_platform_shutdown,
+       .driver         = {
+               .name   = "bcm63xx_ehci",
+               .owner  = THIS_MODULE,
+       },
+};
+
+MODULE_ALIAS("platform:bcm63xx_ehci");
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 1ec3857..8e7c61e 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1158,6 +1158,11 @@ MODULE_LICENSE ("GPL");
 #define        PLATFORM_DRIVER         ehci_atmel_driver
 #endif
 
+#ifdef CONFIG_BCM63XX
+#include "ehci-bcm63xx.c"
+#define        PLATFORM_DRIVER         ehci_hcd_bcm63xx_driver
+#endif
+
 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER)
 #error "missing bus glue for ehci-hcd"
-- 
1.6.3.3


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