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[PATCH 1/2] USB: add Broadcom 63xx integrated OHCI controller support.

To: David Brownell <dbrownell@users.sourceforge.net>, linux-usb@vger.kernel.org
Subject: [PATCH 1/2] USB: add Broadcom 63xx integrated OHCI controller support.
From: Maxime Bizon <mbizon@freebox.fr>
Date: Sat, 30 Jan 2010 18:54:30 +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/ohci-bcm63xx.c |  166 +++++++++++++++++++++++++++++++++++++++
 drivers/usb/host/ohci-hcd.c     |    5 +
 drivers/usb/host/ohci.h         |    2 +-
 3 files changed, 172 insertions(+), 1 deletions(-)
 create mode 100644 drivers/usb/host/ohci-bcm63xx.c

diff --git a/drivers/usb/host/ohci-bcm63xx.c b/drivers/usb/host/ohci-bcm63xx.c
new file mode 100644
index 0000000..c9bccec
--- /dev/null
+++ b/drivers/usb/host/ohci-bcm63xx.c
@@ -0,0 +1,166 @@
+/*
+ * 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) 2010 Maxime Bizon <mbizon@freebox.fr>
+ */
+
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_io.h>
+
+static struct clk *usb_host_clock;
+
+static int __devinit ohci_bcm63xx_start(struct usb_hcd *hcd)
+{
+       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+       int ret;
+
+        /*
+         * port 2 can be shared with USB slave, but all boards seem to
+         * have only one host port populated, so we can hardcode it
+         */
+       ohci->num_ports = 1;
+
+       ret = ohci_init(ohci);
+       if (ret < 0)
+               return ret;
+
+       ret = ohci_run(ohci);
+       if (ret < 0) {
+               err("can't start %s", hcd->self.bus_name);
+               ohci_stop(hcd);
+               return ret;
+       }
+       return 0;
+}
+
+static const struct hc_driver ohci_bcm63xx_hc_driver = {
+       .description =          hcd_name,
+       .product_desc =         "BCM63XX integrated OHCI controller",
+       .hcd_priv_size =        sizeof(struct ohci_hcd),
+
+       .irq =                  ohci_irq,
+       .flags =                HCD_USB11 | HCD_MEMORY,
+       .start =                ohci_bcm63xx_start,
+       .stop =                 ohci_stop,
+       .shutdown =             ohci_shutdown,
+       .urb_enqueue =          ohci_urb_enqueue,
+       .urb_dequeue =          ohci_urb_dequeue,
+       .endpoint_disable =     ohci_endpoint_disable,
+       .get_frame_number =     ohci_get_frame,
+       .hub_status_data =      ohci_hub_status_data,
+       .hub_control =          ohci_hub_control,
+       .start_port_reset =     ohci_start_port_reset,
+};
+
+static int __devinit ohci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
+{
+       struct resource *res_mem;
+       struct usb_hcd *hcd;
+       struct ohci_hcd *ohci;
+       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;
+
+       if (BCMCPU_IS_6348()) {
+               struct clk *clk;
+               /* enable USB host clock */
+               clk = clk_get(&pdev->dev, "usbh");
+               if (IS_ERR(clk))
+                       return -ENODEV;
+
+               clk_enable(clk);
+               usb_host_clock = clk;
+               bcm_rset_writel(RSET_OHCI_PRIV, 0, OHCI_PRIV_REG);
+
+       } else if (BCMCPU_IS_6358()) {
+               reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
+               reg &= ~USBH_PRIV_SWAP_OHCI_ENDN_MASK;
+               reg |= USBH_PRIV_SWAP_OHCI_DATA_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);
+       } else
+               return 0;
+
+       hcd = usb_create_hcd(&ohci_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;
+       }
+
+       ohci = hcd_to_ohci(hcd);
+       ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC |
+               OHCI_QUIRK_FRAME_NO;
+       ohci_hcd_init(ohci);
+
+       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 ohci_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);
+       if (usb_host_clock) {
+               clk_disable(usb_host_clock);
+               clk_put(usb_host_clock);
+       }
+       platform_set_drvdata(pdev, NULL);
+       return 0;
+}
+
+static struct platform_driver ohci_hcd_bcm63xx_driver = {
+       .probe          = ohci_hcd_bcm63xx_drv_probe,
+       .remove         = __devexit_p(ohci_hcd_bcm63xx_drv_remove),
+       .shutdown       = usb_hcd_platform_shutdown,
+       .driver         = {
+               .name   = "bcm63xx_ohci",
+               .owner  = THIS_MODULE,
+       },
+};
+
+MODULE_ALIAS("platform:bcm63xx_ohci");
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 24eb747..1c82a60 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1051,6 +1051,11 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER                usb_hcd_pnx4008_driver
 #endif
 
+#ifdef CONFIG_BCM63XX
+#include "ohci-bcm63xx.c"
+#define PLATFORM_DRIVER                ohci_hcd_bcm63xx_driver
+#endif
+
 #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
     defined(CONFIG_CPU_SUBTYPE_SH7763) || \
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 5bf15fe..3c54d3e 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -655,7 +655,7 @@ static inline u32 hc32_to_cpup (const struct ohci_hcd 
*ohci, const __hc32 *x)
  * some big-endian SOC implementations.  Same thing happens with PSW access.
  */
 
-#ifdef CONFIG_PPC_MPC52xx
+#if defined(CONFIG_PPC_MPC52xx) || defined(CONFIG_BCM63XX)
 #define big_endian_frame_no_quirk(ohci)        (ohci->flags & 
OHCI_QUIRK_FRAME_NO)
 #else
 #define big_endian_frame_no_quirk(ohci)        0
-- 
1.6.3.3


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