From db58271d5152aa1d3894fdef13ca04379139d5d9 Mon Sep 17 00:00:00 2001
From: Maxime Bizon <mbizon@freebox.fr>
Date: Fri, 10 Jun 2011 19:15:47 +0200
Subject: [PATCH 25/63] ehci: add driver for bcm63xx integrated controller.

---
 drivers/usb/host/Kconfig        |   10 ++-
 drivers/usb/host/ehci-bcm63xx.c |  186 +++++++++++++++++++++++++++++++++++++++
 drivers/usb/host/ehci-hcd.c     |    5 +
 3 files changed, 199 insertions(+), 1 deletions(-)
 create mode 100644 drivers/usb/host/ehci-bcm63xx.c

--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -106,7 +106,7 @@ config USB_EHCI_BIG_ENDIAN_MMIO
 	depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || \
 				    ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
 				    PPC_MPC512x || CPU_CAVIUM_OCTEON || \
-				    PMC_MSP || SPARC_LEON)
+				    PMC_MSP || SPARC_LEON || BCM63XX)
 	default y
 
 config USB_EHCI_BIG_ENDIAN_DESC
@@ -129,6 +129,14 @@ config XPS_USB_HCD_XILINX
 config USB_FSL_MPH_DR_OF
 	tristate
 
+config USB_EHCI_BCM63XX
+	bool "Support for Broadcom 63xx on-chip EHCI USB controller"
+	depends on USB_EHCI_HCD && BCM63XX
+	select USB_EHCI_BIG_ENDIAN_MMIO
+	---help---
+	  Enables support for the on-chip EHCI controller on
+	  BCM6358 and later chips.
+
 config USB_EHCI_FSL
 	bool "Support for Freescale PPC on-chip EHCI USB controller"
 	depends on USB_EHCI_HCD && FSL_SOC
--- /dev/null
+++ b/drivers/usb/host/ehci-bcm63xx.c
@@ -0,0 +1,186 @@
+/*
+ * 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/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 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;
+	struct clk *clk;
+	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;
+
+	/* enable USB host clock */
+	clk = clk_get(&pdev->dev, "usbh");
+	if (IS_ERR(clk))
+		return -ENODEV;
+
+	clk_enable(clk);
+	usb_host_clock = clk;
+	msleep(100);
+
+	if (BCMCPU_IS_6358()) {
+		reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_6358_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_6358_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_6358_REG);
+
+	} else if (BCMCPU_IS_6368()) {
+
+		reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_6368_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_6368_REG);
+
+		reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SETUP_6368_REG);
+		reg |= USBH_PRIV_SETUP_IOC_MASK;
+		bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SETUP_6368_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, ehci_readl(ehci, &ehci->caps->hc_capbase));
+	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+	ehci->sbrn = 0x20;
+	ehci->ignore_oc = 1;
+
+	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);
+	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 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");
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1381,6 +1381,11 @@ MODULE_LICENSE ("GPL");
 #define        PLATFORM_DRIVER         ehci_mv_driver
 #endif
 
+#ifdef CONFIG_USB_EHCI_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) && \
     !defined(XILINX_OF_PLATFORM_DRIVER)
