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[PATCH v2 19/26] USB: Add JZ4740 ohci support

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH v2 19/26] USB: Add JZ4740 ohci support
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 19 Jun 2010 07:08:24 +0200
Cc: linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, Lars-Peter Clausen <lars@metafoo.de>, Greg Kroah-Hartman <gregkh@suse.de>, David Brownell <dbrownell@users.sourceforge.net>, linux-usb@vger.kernel.org
In-reply-to: <1276924111-11158-1-git-send-email-lars@metafoo.de>
References: <1276924111-11158-1-git-send-email-lars@metafoo.de>
Sender: linux-mips-bounce@linux-mips.org
This patch adds ohci glue code for JZ4740 SoCs ohci module.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: linux-usb@vger.kernel.org

---
Changes since v1
- Do not request IRQ with IRQF_DISABLED, since it is a noop now
- Add copyright header
---
 drivers/usb/Kconfig            |    1 +
 drivers/usb/host/ohci-hcd.c    |    5 +
 drivers/usb/host/ohci-jz4740.c |  276 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 282 insertions(+), 0 deletions(-)
 create mode 100644 drivers/usb/host/ohci-jz4740.c

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 6a58cb1..39a6bfd 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -46,6 +46,7 @@ config USB_ARCH_HAS_OHCI
        default y if PPC_MPC52xx
        # MIPS:
        default y if SOC_AU1X00
+       default y if MACH_JZ4740
        # SH:
        default y if CPU_SUBTYPE_SH7720
        default y if CPU_SUBTYPE_SH7721
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index fc57655..05b071c 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1095,6 +1095,11 @@ MODULE_LICENSE ("GPL");
 #define TMIO_OHCI_DRIVER       ohci_hcd_tmio_driver
 #endif
 
+#ifdef CONFIG_MACH_JZ4740
+#include "ohci-jz4740.c"
+#define PLATFORM_DRIVER        ohci_hcd_jz4740_driver
+#endif
+
 #if    !defined(PCI_DRIVER) &&         \
        !defined(PLATFORM_DRIVER) &&    \
        !defined(OMAP1_PLATFORM_DRIVER) &&      \
diff --git a/drivers/usb/host/ohci-jz4740.c b/drivers/usb/host/ohci-jz4740.c
new file mode 100644
index 0000000..10e1872
--- /dev/null
+++ b/drivers/usb/host/ohci-jz4740.c
@@ -0,0 +1,276 @@
+/*
+ *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ *  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.
+ *
+ *  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.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+
+struct jz4740_ohci_hcd {
+       struct ohci_hcd ohci_hcd;
+
+       struct regulator *vbus;
+       bool vbus_enabled;
+       struct clk *clk;
+};
+
+static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
+{
+       return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd 
*jz4740_ohci)
+{
+       return container_of((void *)jz4740_ohci, struct usb_hcd, hcd_priv);
+}
+
+static int ohci_jz4740_start(struct usb_hcd *hcd)
+{
+       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+       int     ret;
+
+       ret = ohci_init(ohci);
+       if (ret < 0)
+               return ret;
+
+       ohci->num_ports = 1;
+
+       ret = ohci_run(ohci);
+       if (ret < 0) {
+               dev_err(hcd->self.controller, "Can not start %s",
+                       hcd->self.bus_name);
+               ohci_stop(hcd);
+               return ret;
+       }
+       return 0;
+}
+
+static int ohci_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
+       bool enabled)
+{
+       int ret = 0;
+
+       if (!jz4740_ohci->vbus)
+               return 0;
+
+       if (enabled && !jz4740_ohci->vbus_enabled) {
+               ret = regulator_enable(jz4740_ohci->vbus);
+               if (ret)
+                       dev_err(jz4740_hcd_to_hcd(jz4740_ohci)->self.controller,
+                               "Could not power vbus\n");
+       } else if (!enabled && jz4740_ohci->vbus_enabled) {
+               ret = regulator_disable(jz4740_ohci->vbus);
+       }
+
+       if (ret == 0)
+               jz4740_ohci->vbus_enabled = enabled;
+
+       return ret;
+}
+
+static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 
wValue,
+       u16 wIndex, char *buf, u16 wLength)
+{
+       struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
+       int ret;
+
+       switch (typeReq) {
+       case SetHubFeature:
+               if (wValue == USB_PORT_FEAT_POWER)
+                       ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
+               break;
+       case ClearHubFeature:
+               if (wValue == USB_PORT_FEAT_POWER)
+                       ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
+               break;
+       }
+
+       if (ret)
+               return ret;
+
+       return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
+}
+
+
+static const struct hc_driver ohci_jz4740_hc_driver = {
+       .description =          hcd_name,
+       .product_desc =         "JZ4740 OHCI",
+       .hcd_priv_size =        sizeof(struct jz4740_ohci_hcd),
+
+       /*
+        * generic hardware linkage
+        */
+       .irq =                  ohci_irq,
+       .flags =                HCD_USB11 | HCD_MEMORY,
+
+       /*
+        * basic lifecycle operations
+        */
+       .start =                ohci_jz4740_start,
+       .stop =                 ohci_stop,
+       .shutdown =             ohci_shutdown,
+
+       /*
+        * managing i/o requests and associated device resources
+        */
+       .urb_enqueue =          ohci_urb_enqueue,
+       .urb_dequeue =          ohci_urb_dequeue,
+       .endpoint_disable =     ohci_endpoint_disable,
+
+       /*
+        * scheduling support
+        */
+       .get_frame_number =     ohci_get_frame,
+
+       /*
+        * root hub support
+        */
+       .hub_status_data =      ohci_hub_status_data,
+       .hub_control =          ohci_jz4740_hub_control,
+#ifdef CONFIG_PM
+       .bus_suspend =          ohci_bus_suspend,
+       .bus_resume =           ohci_bus_resume,
+#endif
+       .start_port_reset =     ohci_start_port_reset,
+};
+
+
+static __devinit int jz4740_ohci_probe(struct platform_device *pdev)
+{
+       int ret;
+       struct usb_hcd *hcd;
+       struct jz4740_ohci_hcd *jz4740_ohci;
+       struct resource *res;
+       int irq;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+       if (!res) {
+               dev_err(&pdev->dev, "Failed to get platform resource\n");
+               return -ENOENT;
+       }
+
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               dev_err(&pdev->dev, "Failed to get platform irq\n");
+               return irq;
+       }
+
+       hcd = usb_create_hcd(&ohci_jz4740_hc_driver, &pdev->dev, "jz4740");
+       if (!hcd) {
+               dev_err(&pdev->dev, "Failed to create hcd.\n");
+               return -ENOMEM;
+       }
+
+       jz4740_ohci = hcd_to_jz4740_hcd(hcd);
+
+       res = request_mem_region(res->start, resource_size(res), hcd_name);
+       if (!res) {
+               dev_err(&pdev->dev, "Failed to request mem region.\n");
+               ret = -EBUSY;
+               goto err_free;
+       }
+
+       hcd->rsrc_start = res->start;
+       hcd->rsrc_len = resource_size(res);
+       hcd->regs = ioremap(res->start, resource_size(res));
+
+       if (!hcd->regs) {
+               dev_err(&pdev->dev, "Failed to ioremap registers.\n");
+               ret = -EBUSY;
+               goto err_release_mem;
+       }
+
+       jz4740_ohci->clk = clk_get(&pdev->dev, "uhc");
+       if (IS_ERR(jz4740_ohci->clk)) {
+               ret = PTR_ERR(jz4740_ohci->clk);
+               dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
+               goto err_iounmap;
+       }
+
+       jz4740_ohci->vbus = regulator_get(&pdev->dev, "vbus");
+       if (IS_ERR(jz4740_ohci->vbus))
+               jz4740_ohci->vbus = NULL;
+
+
+       clk_set_rate(jz4740_ohci->clk, 48000000);
+       clk_enable(jz4740_ohci->clk);
+       if (jz4740_ohci->vbus)
+               ohci_jz4740_set_vbus_power(jz4740_ohci, true);
+
+       platform_set_drvdata(pdev, hcd);
+
+       ohci_hcd_init(hcd_to_ohci(hcd));
+
+       ret = usb_add_hcd(hcd, irq, 0);
+       if (ret) {
+               dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
+               goto err_disable;
+       }
+
+       return 0;
+
+err_disable:
+       platform_set_drvdata(pdev, NULL);
+       if (jz4740_ohci->vbus) {
+               regulator_disable(jz4740_ohci->vbus);
+               regulator_put(jz4740_ohci->vbus);
+       }
+       clk_disable(jz4740_ohci->clk);
+
+       clk_put(jz4740_ohci->clk);
+err_iounmap:
+       iounmap(hcd->regs);
+err_release_mem:
+       release_mem_region(res->start, resource_size(res));
+err_free:
+       usb_put_hcd(hcd);
+
+       return ret;
+}
+
+static __devexit int jz4740_ohci_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(pdev);
+       struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
+
+       usb_remove_hcd(hcd);
+
+       platform_set_drvdata(pdev, NULL);
+
+       if (jz4740_ohci->vbus) {
+               regulator_disable(jz4740_ohci->vbus);
+               regulator_put(jz4740_ohci->vbus);
+       }
+
+       clk_disable(jz4740_ohci->clk);
+       clk_put(jz4740_ohci->clk);
+
+       iounmap(hcd->regs);
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+
+       usb_put_hcd(hcd);
+
+       return 0;
+}
+
+static struct platform_driver ohci_hcd_jz4740_driver = {
+       .probe = jz4740_ohci_probe,
+       .remove = __devexit_p(jz4740_ohci_remove),
+       .driver = {
+               .name = "jz4740-ohci",
+               .owner = THIS_MODULE,
+       },
+};
+
+MODULE_ALIAS("platfrom:jz4740-ohci");
-- 
1.5.6.5


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