/* ==========================================================================
 * BLX HS OTG Linux Software Driver and documentation (hereinafter,
 * "Software") is an Unsupported proprietary work of BLX, Inc. unless
 * otherwise expressly agreed to in writing between BLX and you.
 *
 * The Software IS NOT an item of Licensed Software or Licensed Product under
 * any End User Software License Agreement or Agreement for Licensed Product
 * with BLX or any supplement thereto. You are permitted to use and
 * redistribute this Software in source and binary forms, with or without
 * modification, provided that redistributions of source code must retain this
 * notice. You may not view, use, disclose, copy or distribute this file or
 * any information contained herein except pursuant to this license grant from
 * BLX. If you do not agree with this notice, including the disclaimer
 * below, then you are not authorized to use the Software.
 *
 * THIS SOFTWARE IS BEING DISTRIBUTED BY BLX SOLELY ON AN "AS IS" BASIS
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL BLX BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * ========================================================================== */

/** @file
 * The gsc3280_otg_driver module provides the initialization and cleanup entry
 * points for the GSC3280_otg driver. This module will be dynamically installed
 * after Linux is booted using the insmod command. When the module is
 * installed, the gsc3280_otg_driver_init function is called. When the module is
 * removed (using rmmod), the gsc3280_otg_driver_cleanup function is called.
 *
 */

#include "gsc3280_otg_os_dep.h"
#include "gsc3280_os.h"
#include "gsc3280_otg_dbg.h"
#include "gsc3280_otg_driver.h"
#include "gsc3280_otg_attr.h"
#include "gsc3280_otg_core_if.h"
#include "gsc3280_otg_pcd_if.h"
#include "gsc3280_otg_hcd_if.h"

#define GSC3280_DRIVER_VERSION	"2.92a 15-NOV-2010"
#define GSC3280_DRIVER_DESC		"HS OTG USB Controller driver"

static const char gsc3280_driver_name[] = "gsc3280_otg";

extern int pcd_init(struct platform_device *pdev);
extern int hcd_init(struct platform_device *pdev);

extern int pcd_remove(struct platform_device *pdev);

extern void hcd_remove(struct platform_device *pdev);

extern void gsc3280_otg_adp_start(gsc3280_otg_core_if_t * core_if);

/*-------------------------------------------------------------------------*/
/* Encapsulate the module parameter settings */

struct gsc3280_otg_driver_module_params {
	int32_t opt;
	int32_t otg_cap;
	int32_t dma_enable;
	int32_t dma_desc_enable;
	int32_t dma_burst_size;
	int32_t speed;
	int32_t host_support_fs_ls_low_power;
	int32_t host_ls_low_power_phy_clk;
	int32_t enable_dynamic_fifo;
	int32_t data_fifo_size;
	int32_t dev_rx_fifo_size;
	int32_t dev_nperio_tx_fifo_size;
	uint32_t dev_perio_tx_fifo_size[MAX_PERIO_FIFOS];
	int32_t host_rx_fifo_size;
	int32_t host_nperio_tx_fifo_size;
	int32_t host_perio_tx_fifo_size;
	int32_t max_transfer_size;
	int32_t max_packet_count;
	int32_t host_channels;
	int32_t dev_endpoints;
	int32_t phy_type;
	int32_t phy_utmi_width;
	int32_t phy_ulpi_ddr;
	int32_t phy_ulpi_ext_vbus;
	int32_t i2c_enable;
	int32_t ulpi_fs_ls;
	int32_t ts_dline;
	int32_t en_multiple_tx_fifo;
	uint32_t dev_tx_fifo_size[MAX_TX_FIFOS];
	uint32_t thr_ctl;
	uint32_t tx_thr_length;
	uint32_t rx_thr_length;
	int32_t pti_enable;
	int32_t mpi_enable;
	int32_t lpm_enable;
	int32_t ic_usb_cap;
	int32_t ahb_thr_ratio;
	int32_t power_down;
	int32_t reload_ctl;
	int32_t otg_ver;
	int32_t adp_enable;
};

static struct gsc3280_otg_driver_module_params gsc3280_otg_module_params = {
	.opt = -1,
	.otg_cap = 2,
	.dma_enable = 1,   //1
	.dma_desc_enable = 0, //1
	//.dma_desc_enable = 1, //0
	.dma_burst_size = 4,
	.speed = -1,
	.host_support_fs_ls_low_power = -1,
	.host_ls_low_power_phy_clk = -1,
	.enable_dynamic_fifo = -1,
	.data_fifo_size = -1,
	.dev_rx_fifo_size = 256,
	.dev_nperio_tx_fifo_size = 256,
	.dev_perio_tx_fifo_size = {
				   /* dev_perio_tx_fifo_size_1 */
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1,
				   -1
				   /* 15 */
				   },
	.host_rx_fifo_size = 256, // 
	.host_nperio_tx_fifo_size = 256, //hejiasheng
	.host_perio_tx_fifo_size = 256, //hejiasheng
	.max_transfer_size = -1,
	.max_packet_count = -1,
	.host_channels = 8,
	.dev_endpoints = -1,
	.phy_type = -1,
	.phy_utmi_width = 8,
	.phy_ulpi_ddr = -1,
	.phy_ulpi_ext_vbus = -1,
	.i2c_enable = -1,
	.ulpi_fs_ls = -1,
	.ts_dline = -1,
	.en_multiple_tx_fifo = -1,
	.dev_tx_fifo_size = {
			     /* dev_tx_fifo_size */
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1,
			     -1
			     /* 15 */
			     },
	.thr_ctl = -1,
	.tx_thr_length = -1,
	.rx_thr_length = -1,
	.pti_enable = -1,
	.mpi_enable = -1,
	.lpm_enable = -1,
	.ic_usb_cap = -1,
	.ahb_thr_ratio = -1,
	.power_down = -1,
	.reload_ctl = -1,
	.otg_ver = -1,
	.adp_enable = -1,
};

/**
 * This function shows the Driver Version.
 */
static ssize_t version_show(struct device_driver *dev, char *buf)
{
	return snprintf(buf, sizeof(GSC3280_DRIVER_VERSION) + 2, "%s\n",
			GSC3280_DRIVER_VERSION);
}

static DRIVER_ATTR(version, S_IRUGO, version_show, NULL);

/**
 * Global Debug Level Mask.
 */
uint32_t g_dbg_lvl = 0;		/* OFF */

/**
 * This function shows the driver Debug Level.
 */
static ssize_t dbg_level_show(struct device_driver *drv, char *buf)
{
	return sprintf(buf, "0x%0x\n", g_dbg_lvl);
}

/**
 * This function stores the driver Debug Level.
 */
static ssize_t dbg_level_store(struct device_driver *drv, const char *buf,
			       size_t count)
{
	g_dbg_lvl = simple_strtoul(buf, NULL, 16);
	return count;
}

static DRIVER_ATTR(debuglevel, S_IRUGO | S_IWUSR, dbg_level_show,
		   dbg_level_store);

/**
 * This function is called during module intialization
 * to pass module parameters to the GSC3280_OTG CORE.
 */
static int set_parameters(gsc3280_otg_core_if_t * core_if)
{
	int retval = 0;
	int i;

	if (gsc3280_otg_module_params.otg_cap != -1) {
		retval +=
		    gsc3280_otg_set_param_otg_cap(core_if,
					      gsc3280_otg_module_params.otg_cap);
	}
	if (gsc3280_otg_module_params.dma_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_dma_enable(core_if,
						 gsc3280_otg_module_params.
						 dma_enable);
	}
	if (gsc3280_otg_module_params.dma_desc_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_dma_desc_enable(core_if,
						      gsc3280_otg_module_params.
						      dma_desc_enable);
	}
	if (gsc3280_otg_module_params.opt != -1) {
		retval +=
		    gsc3280_otg_set_param_opt(core_if, gsc3280_otg_module_params.opt);
	}
	if (gsc3280_otg_module_params.dma_burst_size != -1) {
		retval +=
		    gsc3280_otg_set_param_dma_burst_size(core_if,
						     gsc3280_otg_module_params.
						     dma_burst_size);
	}
	if (gsc3280_otg_module_params.host_support_fs_ls_low_power != -1) {
		retval +=
		    gsc3280_otg_set_param_host_support_fs_ls_low_power(core_if,
								   gsc3280_otg_module_params.
								   host_support_fs_ls_low_power);
	}
	if (gsc3280_otg_module_params.enable_dynamic_fifo != -1) {
		retval +=
		    gsc3280_otg_set_param_enable_dynamic_fifo(core_if,
							  gsc3280_otg_module_params.
							  enable_dynamic_fifo);
	}
	if (gsc3280_otg_module_params.data_fifo_size != -1) {
		retval +=
		    gsc3280_otg_set_param_data_fifo_size(core_if,
						     gsc3280_otg_module_params.
						     data_fifo_size);
	}
	if (gsc3280_otg_module_params.dev_rx_fifo_size != -1) {
		retval +=
		    gsc3280_otg_set_param_dev_rx_fifo_size(core_if,
						       gsc3280_otg_module_params.
						       dev_rx_fifo_size);
	}
	if (gsc3280_otg_module_params.dev_nperio_tx_fifo_size != -1) {
		retval +=
		    gsc3280_otg_set_param_dev_nperio_tx_fifo_size(core_if,
							      gsc3280_otg_module_params.
							      dev_nperio_tx_fifo_size);
	}
	if (gsc3280_otg_module_params.host_rx_fifo_size != -1) {
		retval +=
		    gsc3280_otg_set_param_host_rx_fifo_size(core_if,
							gsc3280_otg_module_params.host_rx_fifo_size);
	}
	if (gsc3280_otg_module_params.host_nperio_tx_fifo_size != -1) {
		retval +=
		    gsc3280_otg_set_param_host_nperio_tx_fifo_size(core_if,
							       gsc3280_otg_module_params.
							       host_nperio_tx_fifo_size);
	}
	if (gsc3280_otg_module_params.host_perio_tx_fifo_size != -1) {
		retval +=
		    gsc3280_otg_set_param_host_perio_tx_fifo_size(core_if,
							      gsc3280_otg_module_params.
							      host_perio_tx_fifo_size);
	}
	if (gsc3280_otg_module_params.max_transfer_size != -1) {
		retval +=
		    gsc3280_otg_set_param_max_transfer_size(core_if,
							gsc3280_otg_module_params.
							max_transfer_size);
	}
	if (gsc3280_otg_module_params.max_packet_count != -1) {
		retval +=
		    gsc3280_otg_set_param_max_packet_count(core_if,
						       gsc3280_otg_module_params.
						       max_packet_count);
	}
	if (gsc3280_otg_module_params.host_channels != -1) {
		retval +=
		    gsc3280_otg_set_param_host_channels(core_if,
						    gsc3280_otg_module_params.
						    host_channels);
	}
	if (gsc3280_otg_module_params.dev_endpoints != -1) {
		retval +=
		    gsc3280_otg_set_param_dev_endpoints(core_if,
						    gsc3280_otg_module_params.
						    dev_endpoints);
	}
	if (gsc3280_otg_module_params.phy_type != -1) {
		retval +=
		    gsc3280_otg_set_param_phy_type(core_if,
					       gsc3280_otg_module_params.phy_type);
	}
	if (gsc3280_otg_module_params.speed != -1) {
		retval +=
		    gsc3280_otg_set_param_speed(core_if,
					    gsc3280_otg_module_params.speed);
	}
	if (gsc3280_otg_module_params.host_ls_low_power_phy_clk != -1) {
		retval +=
		    gsc3280_otg_set_param_host_ls_low_power_phy_clk(core_if,
								gsc3280_otg_module_params.
								host_ls_low_power_phy_clk);
	}
	if (gsc3280_otg_module_params.phy_ulpi_ddr != -1) {
		retval +=
		    gsc3280_otg_set_param_phy_ulpi_ddr(core_if,
						   gsc3280_otg_module_params.
						   phy_ulpi_ddr);
	}
	if (gsc3280_otg_module_params.phy_ulpi_ext_vbus != -1) {
		retval +=
		    gsc3280_otg_set_param_phy_ulpi_ext_vbus(core_if,
							gsc3280_otg_module_params.
							phy_ulpi_ext_vbus);
	}
	if (gsc3280_otg_module_params.phy_utmi_width != -1) {
		retval +=
		    gsc3280_otg_set_param_phy_utmi_width(core_if,
						     gsc3280_otg_module_params.
						     phy_utmi_width);
	}
	if (gsc3280_otg_module_params.ulpi_fs_ls != -1) {
		retval +=
		    gsc3280_otg_set_param_ulpi_fs_ls(core_if,
						 gsc3280_otg_module_params.ulpi_fs_ls);
	}
	if (gsc3280_otg_module_params.ts_dline != -1) {
		retval +=
		    gsc3280_otg_set_param_ts_dline(core_if,
					       gsc3280_otg_module_params.ts_dline);
	}
	if (gsc3280_otg_module_params.i2c_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_i2c_enable(core_if,
						 gsc3280_otg_module_params.
						 i2c_enable);
	}
	if (gsc3280_otg_module_params.en_multiple_tx_fifo != -1) {
		retval +=
		    gsc3280_otg_set_param_en_multiple_tx_fifo(core_if,
							  gsc3280_otg_module_params.
							  en_multiple_tx_fifo);
	}
	for (i = 0; i < 15; i++) {
		if (gsc3280_otg_module_params.dev_perio_tx_fifo_size[i] != -1) {
			retval +=
			    gsc3280_otg_set_param_dev_perio_tx_fifo_size(core_if,
								     gsc3280_otg_module_params.
								     dev_perio_tx_fifo_size
								     [i], i);
		}
	}

	for (i = 0; i < 15; i++) {
		if (gsc3280_otg_module_params.dev_tx_fifo_size[i] != -1) {
			retval += gsc3280_otg_set_param_dev_tx_fifo_size(core_if,
								     gsc3280_otg_module_params.
								     dev_tx_fifo_size
								     [i], i);
		}
	}
	if (gsc3280_otg_module_params.thr_ctl != -1) {
		retval +=
		    gsc3280_otg_set_param_thr_ctl(core_if,
					      gsc3280_otg_module_params.thr_ctl);
	}
	if (gsc3280_otg_module_params.mpi_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_mpi_enable(core_if,
						 gsc3280_otg_module_params.
						 mpi_enable);
	}
	if (gsc3280_otg_module_params.pti_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_pti_enable(core_if,
						 gsc3280_otg_module_params.
						 pti_enable);
	}
	if (gsc3280_otg_module_params.lpm_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_lpm_enable(core_if,
						 gsc3280_otg_module_params.
						 lpm_enable);
	}
	if (gsc3280_otg_module_params.ic_usb_cap != -1) {
		retval +=
		    gsc3280_otg_set_param_ic_usb_cap(core_if,
						 gsc3280_otg_module_params.
						 ic_usb_cap);
	}
	if (gsc3280_otg_module_params.tx_thr_length != -1) {
		retval +=
		    gsc3280_otg_set_param_tx_thr_length(core_if,
						    gsc3280_otg_module_params.tx_thr_length);
	}
	if (gsc3280_otg_module_params.rx_thr_length != -1) {
		retval +=
		    gsc3280_otg_set_param_rx_thr_length(core_if,
						    gsc3280_otg_module_params.
						    rx_thr_length);
	}
	if (gsc3280_otg_module_params.ahb_thr_ratio != -1) {
		retval +=
		    gsc3280_otg_set_param_ahb_thr_ratio(core_if,
						    gsc3280_otg_module_params.ahb_thr_ratio);
	}
	if (gsc3280_otg_module_params.power_down != -1) {
		retval +=
		    gsc3280_otg_set_param_power_down(core_if,
						 gsc3280_otg_module_params.power_down);
	}
	if (gsc3280_otg_module_params.reload_ctl != -1) {
		retval +=
		    gsc3280_otg_set_param_reload_ctl(core_if,
						 gsc3280_otg_module_params.reload_ctl);
	}
	if (gsc3280_otg_module_params.otg_ver != -1) {
		retval +=
		    gsc3280_otg_set_param_otg_ver(core_if,
					      gsc3280_otg_module_params.otg_ver);
	}
	if (gsc3280_otg_module_params.adp_enable != -1) {
		retval +=
		    gsc3280_otg_set_param_adp_enable(core_if,
						 gsc3280_otg_module_params.
						 adp_enable);
	}
	return retval;
}

/**
 * This function is the top level interrupt handler for the Common
 * (Device and host modes) interrupts.
 */
static irqreturn_t gsc3280_otg_common_irq(int irq, void *dev)
{
	gsc3280_otg_device_t *otg_dev = dev;
	int32_t retval = IRQ_NONE;

	retval = gsc3280_otg_handle_common_intr(otg_dev->core_if);
	if (retval != 0) {
		S3C2410X_CLEAR_EINTPEND();
	}
	return IRQ_RETVAL(retval);
}

static int gsc3280_otg_remove(struct platform_device *pdev)
{
	gsc3280_otg_device_t *otg_dev = platform_get_drvdata(pdev);
	struct resource *mem;

	GSC3280_DEBUGPL(DBG_ANY, "%s(%p)\n", __func__, pdev);

	if (!otg_dev) {
		/* Memory allocation for the gsc3280_otg_device failed. */
		GSC3280_DEBUGPL(DBG_ANY, "%s: otg_dev NULL!\n", __func__);
		return -ENODEV;
	}
#ifndef GSC3280_DEVICE_ONLY
	if (otg_dev->hcd) {
		hcd_remove(pdev);
	} else {
		GSC3280_DEBUGPL(DBG_ANY, "%s: otg_dev->hcd NULL!\n", __func__);
		return -ENODEV;
	}
#endif

#ifndef GSC3280_HOST_ONLY
	if (otg_dev->pcd) {
		pcd_remove(pdev);
	} else {
		GSC3280_DEBUGPL(DBG_ANY, "%s: otg_dev->pcd NULL!\n", __func__);
		return -ENODEV;
	}
#endif
	/*
	 * Free the IRQ
	 */
	if (otg_dev->common_irq_installed) {
		free_irq(otg_dev->irq, otg_dev);
	} else {
		GSC3280_DEBUGPL(DBG_ANY, "%s: There is no installed irq!\n", __func__);
		return -ENXIO;
	}

	if (otg_dev->core_if) {
		gsc3280_otg_cil_remove(otg_dev->core_if);
	} else {
		GSC3280_DEBUGPL(DBG_ANY, "%s: otg_dev->core_if NULL!\n", __func__);
		return -ENODEV;
	}

	/*
	 * Remove the device attributes
	 */
	gsc3280_otg_attr_remove(pdev);

	/*
	 * Return the memory.
	 */
	if (otg_dev->os_dep.base) {
		iounmap(otg_dev->os_dep.base);
	}
	GSC3280_FREE(otg_dev);

	/*
	 * Clear the drvdata pointer.
	 */
	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(mem->start, resource_size(mem));
	return 0;
}

static struct platform_driver gsc3280_otg_driver = {
        .remove         = __devexit_p(gsc3280_otg_remove),
        //.shutdown               = gsc3280_otg_shutdown,
        //.suspend                = gsc3280_otg_suspend,
        //.resume         = gsc3280_otg_resume,
        .driver         = {
                .name   = "gsc3280_otg",
                .owner  = THIS_MODULE,
        },
};

static int gsc3280_otg_probe(struct platform_device *pdev)
{
	int retval = 0;
	gsc3280_otg_device_t *gsc3280_otg_device;
	struct resource *mem = NULL, *ioarea = NULL;
	int irq;

	dev_dbg(&pdev->dev, "gsc3280_otg_probe(%p)\n", pdev);

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!mem) {
		dev_err(&pdev->dev, "no mem resource?\n");
		return -EINVAL;
        }
	
	irq = platform_get_irq(pdev,0);
	if (irq < 0) {
		dev_err(&pdev->dev, "no irq resource?\n");
		return irq; /* -ENXIO */
	}

	ioarea = request_mem_region(mem->start, resource_size(mem), pdev->name);
	 
	if (!ioarea) {
		dev_err(&pdev->dev, "I2C region already claimed\n");
		return -EBUSY;
	}
	
	gsc3280_otg_device = GSC3280_ALLOC(sizeof(gsc3280_otg_device_t));

	if (!gsc3280_otg_device) {
		dev_err(&pdev->dev, "kmalloc of gsc3280_otg_device failed\n");
		return -ENOMEM;
	}

	memset(gsc3280_otg_device, 0, sizeof(*gsc3280_otg_device));
	gsc3280_otg_device->os_dep.reg_offset = 0xFFFFFFFF;

	gsc3280_otg_device->irq = irq;

	/*
	 * Map the GSC3280_otg Core memory into virtual address space.
	 */
	gsc3280_otg_device->os_dep.base = ioremap(mem->start, resource_size(mem));

	if (!gsc3280_otg_device->os_dep.base) {
		dev_err(&pdev->dev, "ioremap() failed\n");
		GSC3280_FREE(gsc3280_otg_device);
		return -ENOMEM;
	}
	dev_dbg(&pdev->dev, "base=0x%08x\n",
		(unsigned)gsc3280_otg_device->os_dep.base);

	/*
	 * Initialize driver data to point to the global GSC3280_otg
	 * Device structure.
	 */

	platform_set_drvdata(pdev, gsc3280_otg_device);

	dev_dbg(&pdev->dev, "gsc3280_otg_device=0x%p\n", gsc3280_otg_device);

	gsc3280_otg_device->core_if = gsc3280_otg_cil_init(gsc3280_otg_device->os_dep.base);
	if (!gsc3280_otg_device->core_if) {
		dev_err(&pdev->dev, "CIL initialization failed!\n");
		retval = -ENOMEM;
		goto fail;
	}

	/*
	 * Attempt to ensure this device is really a GSC3280_otg Controller.
	 * Read and verify the SNPSID register contents. The value should be
	 * 0x45F42XXX, which corresponds to "OT2", as in "OTG version 2.XX".
	 */

	if ((gsc3280_otg_get_gsnpsid(gsc3280_otg_device->core_if) & 0xFFFFF000) !=
	    0x4F542000) {
		dev_err(&pdev->dev, "Bad value for SNPSID: 0x%08x\n",
			gsc3280_otg_get_gsnpsid(gsc3280_otg_device->core_if));
		retval = -EINVAL;
		goto fail;
	}

	/*
	 * Validate parameter values.
	 */
	if (set_parameters(gsc3280_otg_device->core_if)) {
		retval = -EINVAL;
		goto fail;
	}

	/*
	 * Create Device Attributes in sysfs
	 */
	gsc3280_otg_attr_create(pdev);

	/*
	 * Disable the global interrupt until all the interrupt
	 * handlers are installed.
	 */
	gsc3280_otg_disable_global_interrupts(gsc3280_otg_device->core_if);
	
	/*
	 * Install the interrupt handler for the common interrupts before
	 * enabling common interrupts in core_init below.
	 */
	GSC3280_DEBUGPL(DBG_CIL, "registering (common) handler for irq%d\n",
		    gsc3280_otg_device->irq);
	retval = request_irq(irq, gsc3280_otg_common_irq,
			     IRQF_SHARED | IRQF_DISABLED | IRQ_LEVEL, "gsc3280_otg",
			     gsc3280_otg_device);
	if (retval) {
		GSC3280_ERROR("request of irq%d failed\n", gsc3280_otg_device->irq);
		retval = -EBUSY;
		goto fail;
	} else {
		gsc3280_otg_device->common_irq_installed = 1;
	}

	if (gsc3280_otg_get_param_adp_enable(gsc3280_otg_device->core_if)) {
		/*
		 * Performs initial actions required for
		 * Internal ADP logic
		 */
		gsc3280_otg_adp_start(gsc3280_otg_device->core_if);
	} else {
		/*
		 * Initialize the GSC3280_otg core.
		 */
		gsc3280_otg_core_init(gsc3280_otg_device->core_if);

#ifndef GSC3280_HOST_ONLY
		/*
		 * Initialize the PCD
		 */
		retval = pcd_init(pdev);
		if (retval != 0) {
			GSC3280_ERROR("pcd_init failed\n");
			gsc3280_otg_device->pcd = NULL;
			goto fail;
		}
#endif
#ifndef GSC3280_DEVICE_ONLY
		/*
		 * Initialize the HCD
		 */
		retval = hcd_init(pdev);
		if (retval != 0) {
			GSC3280_ERROR("hcd_init failed\n");
			gsc3280_otg_device->hcd = NULL;
			goto fail;
		}
#endif
	}

	/*
	 * Enable the global interrupt after all the interrupt
	 * handlers are installed.
	 */
	gsc3280_otg_enable_global_interrupts(gsc3280_otg_device->core_if);

        driver_create_file(&gsc3280_otg_driver.driver, &driver_attr_debuglevel);

	return 0;

fail:
	gsc3280_otg_remove(pdev);
	return retval;
}

/*
static struct platform_driver gsc3280_otg_driver = {
        .remove         = __devexit_p(gsc3280_otg_remove),
        //.shutdown               = gsc3280_otg_shutdown,
        //.suspend                = gsc3280_otg_suspend,
        //.resume         = gsc3280_otg_resume,
        .driver         = {
                .name   = "gsc3280_otg",
                .owner  = THIS_MODULE,
        },
};
*/

static int __init gsc3280_otg_driver_init(void)
{
	return platform_driver_probe(&gsc3280_otg_driver, gsc3280_otg_probe);
}

module_init(gsc3280_otg_driver_init);

/**
 * This function is called when the driver is removed from the kernel
 * with the rmmod command. The driver unregisters itself with its bus
 * driver.
 *
 */
static void __exit gsc3280_otg_driver_cleanup(void)
{
	printk(KERN_INFO "%s module removed\n", gsc3280_driver_name);
	driver_remove_file(&gsc3280_otg_driver.driver, &driver_attr_debuglevel);
	platform_driver_unregister(&gsc3280_otg_driver);
}

module_exit(gsc3280_otg_driver_cleanup);

MODULE_DESCRIPTION(GSC3280_DRIVER_DESC);
MODULE_AUTHOR("BLX Inc.");
MODULE_LICENSE("GPL");

module_param_named(otg_cap, gsc3280_otg_module_params.otg_cap, int, 0444);
MODULE_PARM_DESC(otg_cap, "OTG Capabilities 0=HNP&SRP 1=SRP Only 2=None");
module_param_named(opt, gsc3280_otg_module_params.opt, int, 0444);
MODULE_PARM_DESC(opt, "OPT Mode");
module_param_named(dma_enable, gsc3280_otg_module_params.dma_enable, int, 0444);
MODULE_PARM_DESC(dma_enable, "DMA Mode 0=Slave 1=DMA enabled");

module_param_named(dma_desc_enable, gsc3280_otg_module_params.dma_desc_enable, int,
		   0444);
MODULE_PARM_DESC(dma_desc_enable,
		 "DMA Desc Mode 0=Address DMA 1=DMA Descriptor enabled");

module_param_named(dma_burst_size, gsc3280_otg_module_params.dma_burst_size, int,
		   0444);
MODULE_PARM_DESC(dma_burst_size,
		 "DMA Burst Size 1, 4, 8, 16, 32, 64, 128, 256");
module_param_named(speed, gsc3280_otg_module_params.speed, int, 0444);
MODULE_PARM_DESC(speed, "Speed 0=High Speed 1=Full Speed");
module_param_named(host_support_fs_ls_low_power,
		   gsc3280_otg_module_params.host_support_fs_ls_low_power, int,
		   0444);
MODULE_PARM_DESC(host_support_fs_ls_low_power,
		 "Support Low Power w/FS or LS 0=Support 1=Don't Support");
module_param_named(host_ls_low_power_phy_clk,
		   gsc3280_otg_module_params.host_ls_low_power_phy_clk, int, 0444);
MODULE_PARM_DESC(host_ls_low_power_phy_clk,
		 "Low Speed Low Power Clock 0=48Mhz 1=6Mhz");
module_param_named(enable_dynamic_fifo,
		   gsc3280_otg_module_params.enable_dynamic_fifo, int, 0444);
MODULE_PARM_DESC(enable_dynamic_fifo, "0=cC Setting 1=Allow Dynamic Sizing");
module_param_named(data_fifo_size, gsc3280_otg_module_params.data_fifo_size, int,
		   0444);
MODULE_PARM_DESC(data_fifo_size,
		 "Total number of words in the data FIFO memory 32-32768");
module_param_named(dev_rx_fifo_size, gsc3280_otg_module_params.dev_rx_fifo_size,
		   int, 0444);
MODULE_PARM_DESC(dev_rx_fifo_size, "Number of words in the Rx FIFO 16-32768");
module_param_named(dev_nperio_tx_fifo_size,
		   gsc3280_otg_module_params.dev_nperio_tx_fifo_size, int, 0444);
MODULE_PARM_DESC(dev_nperio_tx_fifo_size,
		 "Number of words in the non-periodic Tx FIFO 16-32768");
module_param_named(dev_perio_tx_fifo_size_1,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[0], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_1,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_2,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[1], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_2,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_3,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[2], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_3,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_4,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[3], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_4,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_5,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[4], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_5,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_6,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[5], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_6,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_7,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[6], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_7,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_8,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[7], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_8,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_9,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[8], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_9,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_10,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[9], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_10,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_11,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[10], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_11,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_12,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[11], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_12,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_13,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[12], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_13,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_14,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[13], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_14,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(dev_perio_tx_fifo_size_15,
		   gsc3280_otg_module_params.dev_perio_tx_fifo_size[14], int, 0444);
MODULE_PARM_DESC(dev_perio_tx_fifo_size_15,
		 "Number of words in the periodic Tx FIFO 4-768");
module_param_named(host_rx_fifo_size, gsc3280_otg_module_params.host_rx_fifo_size,
		   int, 0444);
MODULE_PARM_DESC(host_rx_fifo_size, "Number of words in the Rx FIFO 16-32768");
module_param_named(host_nperio_tx_fifo_size,
		   gsc3280_otg_module_params.host_nperio_tx_fifo_size, int, 0444);
MODULE_PARM_DESC(host_nperio_tx_fifo_size,
		 "Number of words in the non-periodic Tx FIFO 16-32768");
module_param_named(host_perio_tx_fifo_size,
		   gsc3280_otg_module_params.host_perio_tx_fifo_size, int, 0444);
MODULE_PARM_DESC(host_perio_tx_fifo_size,
		 "Number of words in the host periodic Tx FIFO 16-32768");
module_param_named(max_transfer_size, gsc3280_otg_module_params.max_transfer_size,
		   int, 0444);
/** @todo Set the max to 512K, modify checks */
MODULE_PARM_DESC(max_transfer_size,
		 "The maximum transfer size supported in bytes 2047-65535");
module_param_named(max_packet_count, gsc3280_otg_module_params.max_packet_count,
		   int, 0444);
MODULE_PARM_DESC(max_packet_count,
		 "The maximum number of packets in a transfer 15-511");
module_param_named(host_channels, gsc3280_otg_module_params.host_channels, int,
		   0444);
MODULE_PARM_DESC(host_channels,
		 "The number of host channel registers to use 1-16");
module_param_named(dev_endpoints, gsc3280_otg_module_params.dev_endpoints, int,
		   0444);
MODULE_PARM_DESC(dev_endpoints,
		 "The number of endpoints in addition to EP0 available for device mode 1-15");
module_param_named(phy_type, gsc3280_otg_module_params.phy_type, int, 0444);
MODULE_PARM_DESC(phy_type, "0=Reserved 1=UTMI+ 2=ULPI");
module_param_named(phy_utmi_width, gsc3280_otg_module_params.phy_utmi_width, int,
		   0444);
MODULE_PARM_DESC(phy_utmi_width, "Specifies the UTMI+ Data Width 8 or 16 bits");
module_param_named(phy_ulpi_ddr, gsc3280_otg_module_params.phy_ulpi_ddr, int, 0444);
MODULE_PARM_DESC(phy_ulpi_ddr,
		 "ULPI at double or single data rate 0=Single 1=Double");
module_param_named(phy_ulpi_ext_vbus, gsc3280_otg_module_params.phy_ulpi_ext_vbus,
		   int, 0444);
MODULE_PARM_DESC(phy_ulpi_ext_vbus,
		 "ULPI PHY using internal or external vbus 0=Internal");
module_param_named(i2c_enable, gsc3280_otg_module_params.i2c_enable, int, 0444);
MODULE_PARM_DESC(i2c_enable, "FS PHY Interface");
module_param_named(ulpi_fs_ls, gsc3280_otg_module_params.ulpi_fs_ls, int, 0444);
MODULE_PARM_DESC(ulpi_fs_ls, "ULPI PHY FS/LS mode only");
module_param_named(ts_dline, gsc3280_otg_module_params.ts_dline, int, 0444);
MODULE_PARM_DESC(ts_dline, "Term select Dline pulsing for all PHYs");
module_param_named(debug, g_dbg_lvl, int, 0444);
MODULE_PARM_DESC(debug, "");

module_param_named(en_multiple_tx_fifo,
		   gsc3280_otg_module_params.en_multiple_tx_fifo, int, 0444);
MODULE_PARM_DESC(en_multiple_tx_fifo,
		 "Dedicated Non Periodic Tx FIFOs 0=disabled 1=enabled");
module_param_named(dev_tx_fifo_size_1,
		   gsc3280_otg_module_params.dev_tx_fifo_size[0], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_1, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_2,
		   gsc3280_otg_module_params.dev_tx_fifo_size[1], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_2, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_3,
		   gsc3280_otg_module_params.dev_tx_fifo_size[2], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_3, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_4,
		   gsc3280_otg_module_params.dev_tx_fifo_size[3], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_4, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_5,
		   gsc3280_otg_module_params.dev_tx_fifo_size[4], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_5, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_6,
		   gsc3280_otg_module_params.dev_tx_fifo_size[5], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_6, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_7,
		   gsc3280_otg_module_params.dev_tx_fifo_size[6], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_7, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_8,
		   gsc3280_otg_module_params.dev_tx_fifo_size[7], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_8, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_9,
		   gsc3280_otg_module_params.dev_tx_fifo_size[8], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_9, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_10,
		   gsc3280_otg_module_params.dev_tx_fifo_size[9], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_10, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_11,
		   gsc3280_otg_module_params.dev_tx_fifo_size[10], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_11, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_12,
		   gsc3280_otg_module_params.dev_tx_fifo_size[11], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_12, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_13,
		   gsc3280_otg_module_params.dev_tx_fifo_size[12], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_13, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_14,
		   gsc3280_otg_module_params.dev_tx_fifo_size[13], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_14, "Number of words in the Tx FIFO 4-768");
module_param_named(dev_tx_fifo_size_15,
		   gsc3280_otg_module_params.dev_tx_fifo_size[14], int, 0444);
MODULE_PARM_DESC(dev_tx_fifo_size_15, "Number of words in the Tx FIFO 4-768");

module_param_named(thr_ctl, gsc3280_otg_module_params.thr_ctl, int, 0444);
MODULE_PARM_DESC(thr_ctl,
		 "Thresholding enable flag bit 0 - non ISO Tx thr., 1 - ISO Tx thr., 2 - Rx thr.- bit 0=disabled 1=enabled");
module_param_named(tx_thr_length, gsc3280_otg_module_params.tx_thr_length, int,
		   0444);
MODULE_PARM_DESC(tx_thr_length, "Tx Threshold length in 32 bit DWORDs");
module_param_named(rx_thr_length, gsc3280_otg_module_params.rx_thr_length, int,
		   0444);
MODULE_PARM_DESC(rx_thr_length, "Rx Threshold length in 32 bit DWORDs");

module_param_named(pti_enable, gsc3280_otg_module_params.pti_enable, int, 0444);
module_param_named(mpi_enable, gsc3280_otg_module_params.mpi_enable, int, 0444);
module_param_named(lpm_enable, gsc3280_otg_module_params.lpm_enable, int, 0444);
MODULE_PARM_DESC(lpm_enable, "LPM Enable 0=LPM Disabled 1=LPM Enabled");
module_param_named(ic_usb_cap, gsc3280_otg_module_params.ic_usb_cap, int, 0444);
MODULE_PARM_DESC(ic_usb_cap,
		 "IC_USB Capability 0=IC_USB Disabled 1=IC_USB Enabled");
module_param_named(ahb_thr_ratio, gsc3280_otg_module_params.ahb_thr_ratio, int,
		   0444);
MODULE_PARM_DESC(ahb_thr_ratio, "AHB Threshold Ratio");
module_param_named(power_down, gsc3280_otg_module_params.power_down, int, 0444);
MODULE_PARM_DESC(power_down, "Power Down Mode");
module_param_named(reload_ctl, gsc3280_otg_module_params.reload_ctl, int, 0444);
MODULE_PARM_DESC(reload_ctl, "HFIR Reload Control");
module_param_named(adp_enable, gsc3280_otg_module_params.adp_enable, int, 0444);
MODULE_PARM_DESC(adp_enable, "ADP Enable 0=ADP Disabled 1=ADP Enabled");
module_param_named(otg_ver, gsc3280_otg_module_params.otg_ver, int, 0444);
MODULE_PARM_DESC(otg_ver, "OTG revision supported 0=OTG 1.3 1=OTG 2.0");

#ifndef MODULE
static int __init dma_desc_enable_setup(char *str)
{
       gsc3280_otg_module_params.dma_desc_enable = simple_strtol(str,NULL,0);
       return 1;
}
__setup("dma_desc_enable=",dma_desc_enable_setup);
#endif