usb: musb: add support for ux500 platform

Initial support for u8500 and u5500 platform.

Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

4 files changed, 225 insertions, 1 deletions

diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 03a42901922c..19145f6166fe 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -60,6 +60,10 @@ config USB_MUSB_BLACKFIN
         bool "Blackfin"
         depends on (BF54x && !BF544) || (BF52x && ! BF522 && !BF523)
 
+config USB_MUSB_UX500
+        bool "U8500 and U5500"
+        depends on (ARCH_U8500 && AB8500_USB) || (ARCH_U5500)
+
 endchoice
 
 choice
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index 61f46affcf7a..74df5284894f 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_USB_MUSB_TUSB6010)			+= tusb6010.o
 obj-$(CONFIG_USB_MUSB_DAVINCI)                  += davinci.o
 obj-$(CONFIG_USB_MUSB_DA8XX)                    += da8xx.o
 obj-$(CONFIG_USB_MUSB_BLACKFIN)                 += blackfin.o
+obj-$(CONFIG_USB_MUSB_UX500)                    += ux500.o
 
 # the kconfig must guarantee that only one of the
 # possible I/O schemes will be enabled at a time ...
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 325d7acafdf9..a4e3f872c730 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1069,6 +1069,8 @@ static void musb_shutdown(struct platform_device *pdev)
 #if defined(CONFIG_USB_MUSB_TUSB6010) || defined(CONFIG_USB_MUSB_OMAP2PLUS) \
         || defined(CONFIG_USB_MUSB_AM35X)
 static ushort __initdata fifo_mode = 4;
+#elif defined(CONFIG_USB_MUSB_UX500)
+static ushort __initdata fifo_mode = 5;
 #else
 static ushort __initdata fifo_mode = 2;
 #endif
@@ -1539,7 +1541,8 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
 /*-------------------------------------------------------------------------*/
 
 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) || \
-        defined(CONFIG_ARCH_OMAP4)
+        defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_ARCH_U8500) || \
+        defined(CONFIG_ARCH_U5500)
 
 static irqreturn_t generic_interrupt(int irq, void *__hci)
 {
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
new file mode 100644
index 000000000000..d6384e4aeef9
--- /dev/null
+++ b/drivers/usb/musb/ux500.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2010 ST-Ericsson AB
+ * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
+ *
+ * Based on omap2430.c
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include "musb_core.h"
+
+struct ux500_glue {
+        struct device           *dev;
+        struct platform_device  *musb;
+        struct clk              *clk;
+};
+#define glue_to_musb(g) platform_get_drvdata(g->musb)
+
+static int ux500_musb_init(struct musb *musb)
+{
+        musb->xceiv = otg_get_transceiver();
+        if (!musb->xceiv) {
+                pr_err("HS USB OTG: no transceiver configured\n");
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+static int ux500_musb_exit(struct musb *musb)
+{
+        otg_put_transceiver(musb->xceiv);
+
+        return 0;
+}
+
+static const struct musb_platform_ops ux500_ops = {
+        .init           = ux500_musb_init,
+        .exit           = ux500_musb_exit,
+};
+
+static int __init ux500_probe(struct platform_device *pdev)
+{
+        struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
+        struct platform_device          *musb;
+        struct ux500_glue               *glue;
+        struct clk                      *clk;
+
+        int                             ret = -ENOMEM;
+
+        glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+        if (!glue) {
+                dev_err(&pdev->dev, "failed to allocate glue context\n");
+                goto err0;
+        }
+
+        musb = platform_device_alloc("musb-hdrc", -1);
+        if (!musb) {
+                dev_err(&pdev->dev, "failed to allocate musb device\n");
+                goto err1;
+        }
+
+        clk = clk_get(&pdev->dev, "usb");
+        if (IS_ERR(clk)) {
+                dev_err(&pdev->dev, "failed to get clock\n");
+                ret = PTR_ERR(clk);
+                goto err2;
+        }
+
+        ret = clk_enable(clk);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to enable clock\n");
+                goto err3;
+        }
+
+        musb->dev.parent                = &pdev->dev;
+
+        glue->dev                       = &pdev->dev;
+        glue->musb                      = musb;
+        glue->clk                       = clk;
+
+        pdata->platform_ops             = &ux500_ops;
+
+        platform_set_drvdata(pdev, glue);
+
+        ret = platform_device_add_resources(musb, pdev->resource,
+                        pdev->num_resources);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to add resources\n");
+                goto err4;
+        }
+
+        ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
+        if (ret) {
+                dev_err(&pdev->dev, "failed to add platform_data\n");
+                goto err4;
+        }
+
+        ret = platform_device_add(musb);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to register musb device\n");
+                goto err4;
+        }
+
+        return 0;
+
+err4:
+        clk_disable(clk);
+
+err3:
+        clk_put(clk);
+
+err2:
+        platform_device_put(musb);
+
+err1:
+        kfree(glue);
+
+err0:
+        return ret;
+}
+
+static int __exit ux500_remove(struct platform_device *pdev)
+{
+        struct ux500_glue       *glue = platform_get_drvdata(pdev);
+
+        platform_device_del(glue->musb);
+        platform_device_put(glue->musb);
+        clk_disable(glue->clk);
+        clk_put(glue->clk);
+        kfree(glue);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int ux500_suspend(struct device *dev)
+{
+        struct ux500_glue       *glue = dev_get_drvdata(dev);
+        struct musb             *musb = glue_to_musb(glue);
+
+        otg_set_suspend(musb->xceiv, 1);
+        clk_disable(glue->clk);
+
+        return 0;
+}
+
+static int ux500_resume(struct device *dev)
+{
+        struct ux500_glue       *glue = dev_get_drvdata(dev);
+        struct musb             *musb = glue_to_musb(glue);
+        int                     ret;
+
+        ret = clk_enable(glue->clk);
+        if (ret) {
+                dev_err(dev, "failed to enable clock\n");
+                return ret;
+        }
+
+        otg_set_suspend(musb->xceiv, 0);
+
+        return 0;
+}
+
+static const struct dev_pm_ops ux500_pm_ops = {
+        .suspend        = ux500_suspend,
+        .resume         = ux500_resume,
+};
+
+#define DEV_PM_OPS      (&ux500_pm_ops)
+#else
+#define DEV_PM_OPS      NULL
+#endif
+
+static struct platform_driver ux500_driver = {
+        .remove         = __exit_p(ux500_remove),
+        .driver         = {
+                .name   = "musb-ux500",
+                .pm     = DEV_PM_OPS,
+        },
+};
+
+MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
+MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
+MODULE_LICENSE("GPL v2");
+
+static int __init ux500_init(void)
+{
+        return platform_driver_probe(&ux500_driver, ux500_probe);
+}
+subsys_initcall(ux500_init);
+
+static void __exit ux500_exit(void)
+{
+        platform_driver_unregister(&ux500_driver);
+}
+module_exit(ux500_exit);