path: root/target/linux/lantiq/files/drivers/usb/dwc_otg/dwc_otg_driver.c

/* ==========================================================================
 * $File: //dwh/usb_iip/dev/software/otg_ipmate/linux/drivers/dwc_otg_driver.c $
 * $Revision: 1.1.1.1 $
 * $Date: 2009-04-17 06:15:34 $
 * $Change: 631780 $
 *
 * Synopsys HS OTG Linux Software Driver and documentation (hereinafter,
 * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless
 * otherwise expressly agreed to in writing between Synopsys 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 Synopsys 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
 * Synopsys. 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 SYNOPSYS 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 SYNOPSYS 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 dwc_otg_driver module provides the initialization and cleanup entry
 * points for the DWC_otg driver. This module will be dynamically installed
 * after Linux is booted using the insmod command. When the module is
 * installed, the dwc_otg_init function is called. When the module is
 * removed (using rmmod), the dwc_otg_cleanup function is called.
 * 
 * This module also defines a data structure for the dwc_otg_driver, which is
 * used in conjunction with the standard ARM lm_device structure. These
 * structures allow the OTG driver to comply with the standard Linux driver
 * model in which devices and drivers are registered with a bus driver. This
 * has the benefit that Linux can expose attributes of the driver and device
 * in its special sysfs file system. Users can then read or write files in
 * this file system to perform diagnostics on the driver components or the
 * device.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/gpio.h>

#include <linux/device.h>
#include <linux/platform_device.h>

#include <linux/errno.h>
#include <linux/types.h>
#include <linux/stat.h>  /* permission constants */
#include <linux/irq.h>
#include <asm/io.h>

#include "dwc_otg_plat.h"
#include "dwc_otg_attr.h"
#include "dwc_otg_driver.h"
#include "dwc_otg_cil.h"
#include "dwc_otg_cil_ifx.h"

// #include "dwc_otg_pcd.h" // device
#include "dwc_otg_hcd.h"   // host

#include "dwc_otg_ifx.h" // for Infineon platform specific.

#define	DWC_DRIVER_VERSION	"2.60a 22-NOV-2006"
#define	DWC_DRIVER_DESC		"HS OTG USB Controller driver"

const char dwc_driver_name[] = "dwc_otg";

static unsigned long dwc_iomem_base = IFX_USB_IOMEM_BASE;
int dwc_irq = LTQ_USB_INT;
//int dwc_irq = 54;
//int dwc_irq = IFXMIPS_USB_OC_INT;

extern int ifx_usb_hc_init(unsigned long base_addr, int irq);
extern void ifx_usb_hc_remove(void);

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

static dwc_otg_core_params_t dwc_otg_module_params = {
        .opt = -1,
        .otg_cap = -1,
        .dma_enable = -1,
	.dma_burst_size = -1,
	.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 = -1,
	.dev_nperio_tx_fifo_size = -1,
	.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 = -1,
	.host_nperio_tx_fifo_size = -1,
	.host_perio_tx_fifo_size = -1,
	.max_transfer_size = -1,
	.max_packet_count = -1,
	.host_channels = -1,
	.dev_endpoints = -1,
	.phy_type = -1,
        .phy_utmi_width = -1,
        .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,
};

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

/**
 * Global Debug Level Mask.
 */
uint32_t g_dbg_lvl = 0xff; /* 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 verify that
 * the module parameters are in a valid state.
 */
static int check_parameters(dwc_otg_core_if_t *core_if)
{
	int i;
	int retval = 0;

/* Checks if the parameter is outside of its valid range of values */
#define DWC_OTG_PARAM_TEST(_param_,_low_,_high_) \
	((dwc_otg_module_params._param_ < (_low_)) || \
         (dwc_otg_module_params._param_ > (_high_)))

/* If the parameter has been set by the user, check that the parameter value is
 * within the value range of values.  If not, report a module error. */
#define DWC_OTG_PARAM_ERR(_param_,_low_,_high_,_string_) \
        do { \
		if (dwc_otg_module_params._param_ != -1) { \
			if (DWC_OTG_PARAM_TEST(_param_,(_low_),(_high_))) { \
				DWC_ERROR("`%d' invalid for parameter `%s'\n", \
					  dwc_otg_module_params._param_, _string_); \
				dwc_otg_module_params._param_ = dwc_param_##_param_##_default; \
				retval ++; \
			} \
		} \
	} while (0)

	DWC_OTG_PARAM_ERR(opt,0,1,"opt");
	DWC_OTG_PARAM_ERR(otg_cap,0,2,"otg_cap");
        DWC_OTG_PARAM_ERR(dma_enable,0,1,"dma_enable");
	DWC_OTG_PARAM_ERR(speed,0,1,"speed");
	DWC_OTG_PARAM_ERR(host_support_fs_ls_low_power,0,1,"host_support_fs_ls_low_power");
	DWC_OTG_PARAM_ERR(host_ls_low_power_phy_clk,0,1,"host_ls_low_power_phy_clk");
	DWC_OTG_PARAM_ERR(enable_dynamic_fifo,0,1,"enable_dynamic_fifo");
	DWC_OTG_PARAM_ERR(data_fifo_size,32,32768,"data_fifo_size");
	DWC_OTG_PARAM_ERR(dev_rx_fifo_size,16,32768,"dev_rx_fifo_size");
	DWC_OTG_PARAM_ERR(dev_nperio_tx_fifo_size,16,32768,"dev_nperio_tx_fifo_size");
	DWC_OTG_PARAM_ERR(host_rx_fifo_size,16,32768,"host_rx_fifo_size");
	DWC_OTG_PARAM_ERR(host_nperio_tx_fifo_size,16,32768,"host_nperio_tx_fifo_size");
	DWC_OTG_PARAM_ERR(host_perio_tx_fifo_size,16,32768,"host_perio_tx_fifo_size");
	DWC_OTG_PARAM_ERR(max_transfer_size,2047,524288,"max_transfer_size");
	DWC_OTG_PARAM_ERR(max_packet_count,15,511,"max_packet_count");
	DWC_OTG_PARAM_ERR(host_channels,1,16,"host_channels");
	DWC_OTG_PARAM_ERR(dev_endpoints,1,15,"dev_endpoints");
	DWC_OTG_PARAM_ERR(phy_type,0,2,"phy_type");
        DWC_OTG_PARAM_ERR(phy_ulpi_ddr,0,1,"phy_ulpi_ddr");
        DWC_OTG_PARAM_ERR(phy_ulpi_ext_vbus,0,1,"phy_ulpi_ext_vbus");
	DWC_OTG_PARAM_ERR(i2c_enable,0,1,"i2c_enable");
	DWC_OTG_PARAM_ERR(ulpi_fs_ls,0,1,"ulpi_fs_ls");
	DWC_OTG_PARAM_ERR(ts_dline,0,1,"ts_dline");

	if (dwc_otg_module_params.dma_burst_size != -1) {
		if (DWC_OTG_PARAM_TEST(dma_burst_size,1,1) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,4,4) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,8,8) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,16,16) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,32,32) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,64,64) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,128,128) &&
		    DWC_OTG_PARAM_TEST(dma_burst_size,256,256))
		{
			DWC_ERROR("`%d' invalid for parameter `dma_burst_size'\n", 
				  dwc_otg_module_params.dma_burst_size);
			dwc_otg_module_params.dma_burst_size = 32;
			retval ++;
		}
	}

	if (dwc_otg_module_params.phy_utmi_width != -1) {
		if (DWC_OTG_PARAM_TEST(phy_utmi_width,8,8) &&
		    DWC_OTG_PARAM_TEST(phy_utmi_width,16,16)) 
		{
			DWC_ERROR("`%d' invalid for parameter `phy_utmi_width'\n", 
				  dwc_otg_module_params.phy_utmi_width);
			//dwc_otg_module_params.phy_utmi_width = 16;
			dwc_otg_module_params.phy_utmi_width = 8;
			retval ++;
		}
	}

	for (i=0; i<15; i++) {
		/** @todo should be like above */
		//DWC_OTG_PARAM_ERR(dev_perio_tx_fifo_size[i],4,768,"dev_perio_tx_fifo_size");
		if (dwc_otg_module_params.dev_perio_tx_fifo_size[i] != -1) {
			if (DWC_OTG_PARAM_TEST(dev_perio_tx_fifo_size[i],4,768)) {
				DWC_ERROR("`%d' invalid for parameter `%s_%d'\n",
					  dwc_otg_module_params.dev_perio_tx_fifo_size[i], "dev_perio_tx_fifo_size", i);
				dwc_otg_module_params.dev_perio_tx_fifo_size[i] = dwc_param_dev_perio_tx_fifo_size_default;
				retval ++;
			}
		}
	}

	DWC_OTG_PARAM_ERR(en_multiple_tx_fifo, 0, 1, "en_multiple_tx_fifo");
	for (i = 0; i < 15; i++) {
		/** @todo should be like above */
		    //DWC_OTG_PARAM_ERR(dev_tx_fifo_size[i],4,768,"dev_tx_fifo_size");
		    if (dwc_otg_module_params.dev_tx_fifo_size[i] != -1) {
			if (DWC_OTG_PARAM_TEST(dev_tx_fifo_size[i], 4, 768)) {
				DWC_ERROR("`%d' invalid for parameter `%s_%d'\n",
					dwc_otg_module_params.dev_tx_fifo_size[i],
				     "dev_tx_fifo_size", i);
				dwc_otg_module_params.dev_tx_fifo_size[i] =
				    dwc_param_dev_tx_fifo_size_default;
				retval++;
			}
		}
	}
	DWC_OTG_PARAM_ERR(thr_ctl, 0, 7, "thr_ctl");
	DWC_OTG_PARAM_ERR(tx_thr_length, 8, 128, "tx_thr_length");
	DWC_OTG_PARAM_ERR(rx_thr_length, 8, 128, "rx_thr_length");

	/* At this point, all module parameters that have been set by the user
	 * are valid, and those that have not are left unset.  Now set their
	 * default values and/or check the parameters against the hardware
	 * configurations of the OTG core. */



/* This sets the parameter to the default value if it has not been set by the
 * user */
#define DWC_OTG_PARAM_SET_DEFAULT(_param_) \
	({ \
		int changed = 1; \
		if (dwc_otg_module_params._param_ == -1) { \
			changed = 0; \
			dwc_otg_module_params._param_ = dwc_param_##_param_##_default; \
		} \
		changed; \
	})

/* This checks the macro agains the hardware configuration to see if it is
 * valid.  It is possible that the default value could be invalid.  In this
 * case, it will report a module error if the user touched the parameter.
 * Otherwise it will adjust the value without any error. */
#define DWC_OTG_PARAM_CHECK_VALID(_param_,_str_,_is_valid_,_set_valid_) \
	({ \
	        int changed = DWC_OTG_PARAM_SET_DEFAULT(_param_); \
		int error = 0; \
		if (!(_is_valid_)) { \
			if (changed) { \
				DWC_ERROR("`%d' invalid for parameter `%s'.  Check HW configuration.\n", dwc_otg_module_params._param_,_str_); \
				error = 1; \
			} \
			dwc_otg_module_params._param_ = (_set_valid_); \
		} \
		error; \
	})

	/* OTG Cap */
	retval += DWC_OTG_PARAM_CHECK_VALID(otg_cap,"otg_cap",
                  ({
			  int valid;
			  valid = 1;
			  switch (dwc_otg_module_params.otg_cap) {
			  case DWC_OTG_CAP_PARAM_HNP_SRP_CAPABLE:
				  if (core_if->hwcfg2.b.op_mode != DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG) valid = 0;
				  break;
			  case DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE:
				  if ((core_if->hwcfg2.b.op_mode != DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG) &&
				      (core_if->hwcfg2.b.op_mode != DWC_HWCFG2_OP_MODE_SRP_ONLY_CAPABLE_OTG) &&
				      (core_if->hwcfg2.b.op_mode != DWC_HWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) &&
				      (core_if->hwcfg2.b.op_mode != DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST))
				  {
					  valid = 0;
				  }
				  break;
			  case DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE:
				  /* always valid */
				  break;
			  } 
			  valid;
		  }),
                  (((core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_HNP_SRP_CAPABLE_OTG) ||
		    (core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_SRP_ONLY_CAPABLE_OTG) ||
		    (core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) ||
		    (core_if->hwcfg2.b.op_mode == DWC_HWCFG2_OP_MODE_SRP_CAPABLE_HOST)) ?
		   DWC_OTG_CAP_PARAM_SRP_ONLY_CAPABLE :
		   DWC_OTG_CAP_PARAM_NO_HNP_SRP_CAPABLE));
	
	retval += DWC_OTG_PARAM_CHECK_VALID(dma_enable,"dma_enable",
					    ((dwc_otg_module_params.dma_enable == 1) && (core_if->hwcfg2.b.architecture == 0)) ? 0 : 1, 
					    0);

	retval += DWC_OTG_PARAM_CHECK_VALID(opt,"opt",
					    1,
					    0);

	DWC_OTG_PARAM_SET_DEFAULT(dma_burst_size);

	retval += DWC_OTG_PARAM_CHECK_VALID(host_support_fs_ls_low_power,
					    "host_support_fs_ls_low_power",
					    1, 0);

	retval += DWC_OTG_PARAM_CHECK_VALID(enable_dynamic_fifo,
				  "enable_dynamic_fifo",
				  ((dwc_otg_module_params.enable_dynamic_fifo == 0) ||
				   (core_if->hwcfg2.b.dynamic_fifo == 1)), 0);


	retval += DWC_OTG_PARAM_CHECK_VALID(data_fifo_size,
				  "data_fifo_size",
				  (dwc_otg_module_params.data_fifo_size <= core_if->hwcfg3.b.dfifo_depth),
				  core_if->hwcfg3.b.dfifo_depth);

	retval += DWC_OTG_PARAM_CHECK_VALID(dev_rx_fifo_size,
				  "dev_rx_fifo_size",
				  (dwc_otg_module_params.dev_rx_fifo_size <= dwc_read_reg32(&core_if->core_global_regs->grxfsiz)),
				  dwc_read_reg32(&core_if->core_global_regs->grxfsiz));

	retval += DWC_OTG_PARAM_CHECK_VALID(dev_nperio_tx_fifo_size,
				  "dev_nperio_tx_fifo_size",
				  (dwc_otg_module_params.dev_nperio_tx_fifo_size <= (dwc_read_reg32(&core_if->core_global_regs->gnptxfsiz) >> 16)),
				  (dwc_read_reg32(&core_if->core_global_regs->gnptxfsiz) >> 16));

	retval += DWC_OTG_PARAM_CHECK_VALID(host_rx_fifo_size,
					    "host_rx_fifo_size",
					    (dwc_otg_module_params.host_rx_fifo_size <= dwc_read_reg32(&core_if->core_global_regs->grxfsiz)),
					    dwc_read_reg32(&core_if->core_global_regs->grxfsiz));


	retval += DWC_OTG_PARAM_CHECK_VALID(host_nperio_tx_fifo_size,
				  "host_nperio_tx_fifo_size",
				  (dwc_otg_module_params.host_nperio_tx_fifo_size <= (dwc_read_reg32(&core_if->core_global_regs->gnptxfsiz) >> 16)),
				  (dwc_read_reg32(&core_if->core_global_regs->gnptxfsiz) >> 16));

	retval += DWC_OTG_PARAM_CHECK_VALID(host_perio_tx_fifo_size,
					    "host_perio_tx_fifo_size",
					    (dwc_otg_module_params.host_perio_tx_fifo_size <= ((dwc_read_reg32(&core_if->core_global_regs->hptxfsiz) >> 16))),
					    ((dwc_read_reg32(&core_if->core_global_regs->hptxfsiz) >> 16)));

	retval += DWC_OTG_PARAM_CHECK_VALID(max_transfer_size,
				  "max_transfer_size",
				  (dwc_otg_module_params.max_transfer_size < (1 << (core_if->hwcfg3.b.xfer_size_cntr_width + 11))),
				  ((1 << (core_if->hwcfg3.b.xfer_size_cntr_width + 11)) - 1));

	retval += DWC_OTG_PARAM_CHECK_VALID(max_packet_count,
				  "max_packet_count",
				  (dwc_otg_module_params.max_packet_count < (1 << (core_if->hwcfg3.b.packet_size_cntr_width + 4))),
				  ((1 << (core_if->hwcfg3.b.packet_size_cntr_width + 4)) - 1));

	retval += DWC_OTG_PARAM_CHECK_VALID(host_channels,
				  "host_channels",
				  (dwc_otg_module_params.host_channels <= (core_if->hwcfg2.b.num_host_chan + 1)),
				  (core_if->hwcfg2.b.num_host_chan + 1));

	retval += DWC_OTG_PARAM_CHECK_VALID(dev_endpoints,
				  "dev_endpoints",
				  (dwc_otg_module_params.dev_endpoints <= (core_if->hwcfg2.b.num_dev_ep)),
				  core_if->hwcfg2.b.num_dev_ep);

/*
 * Define the following to disable the FS PHY Hardware checking.  This is for
 * internal testing only.
 *
 * #define NO_FS_PHY_HW_CHECKS 
 */

#ifdef NO_FS_PHY_HW_CHECKS
	retval += DWC_OTG_PARAM_CHECK_VALID(phy_type,
					    "phy_type", 1, 0);
#else
	retval += DWC_OTG_PARAM_CHECK_VALID(phy_type,
					    "phy_type",
					    ({
						    int valid = 0;
						    if ((dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_UTMI) &&
							((core_if->hwcfg2.b.hs_phy_type == 1) || 
							 (core_if->hwcfg2.b.hs_phy_type == 3)))
						    {
							    valid = 1;
						    }
						    else if ((dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_ULPI) &&
							     ((core_if->hwcfg2.b.hs_phy_type == 2) || 
							      (core_if->hwcfg2.b.hs_phy_type == 3)))
						    {
							    valid = 1;
						    }
						    else if ((dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_FS) &&
							     (core_if->hwcfg2.b.fs_phy_type == 1))
						    {
							    valid = 1;
						    }
						    valid;
					    }),
					    ({
						    int set = DWC_PHY_TYPE_PARAM_FS;
						    if (core_if->hwcfg2.b.hs_phy_type) { 
							    if ((core_if->hwcfg2.b.hs_phy_type == 3) || 
								(core_if->hwcfg2.b.hs_phy_type == 1)) {
								    set = DWC_PHY_TYPE_PARAM_UTMI;
							    }
							    else {
								    set = DWC_PHY_TYPE_PARAM_ULPI;
							    }
						    }
						    set;
					    }));
#endif

	retval += DWC_OTG_PARAM_CHECK_VALID(speed,"speed",
					    (dwc_otg_module_params.speed == 0) && (dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_FS) ? 0 : 1,
					    dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_FS ? 1 : 0);

	retval += DWC_OTG_PARAM_CHECK_VALID(host_ls_low_power_phy_clk,
					    "host_ls_low_power_phy_clk",
					    ((dwc_otg_module_params.host_ls_low_power_phy_clk == DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ) && (dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_FS) ? 0 : 1),
					    ((dwc_otg_module_params.phy_type == DWC_PHY_TYPE_PARAM_FS) ? DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ : DWC_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ));

        DWC_OTG_PARAM_SET_DEFAULT(phy_ulpi_ddr);
        DWC_OTG_PARAM_SET_DEFAULT(phy_ulpi_ext_vbus);
        DWC_OTG_PARAM_SET_DEFAULT(phy_utmi_width);
        DWC_OTG_PARAM_SET_DEFAULT(ulpi_fs_ls);
        DWC_OTG_PARAM_SET_DEFAULT(ts_dline);

#ifdef NO_FS_PHY_HW_CHECKS
	retval += DWC_OTG_PARAM_CHECK_VALID(i2c_enable,
					    "i2c_enable", 1, 0);
#else
	retval += DWC_OTG_PARAM_CHECK_VALID(i2c_enable,
					    "i2c_enable",
					    (dwc_otg_module_params.i2c_enable == 1) && (core_if->hwcfg3.b.i2c == 0) ? 0 : 1,
					    0);
#endif

	for (i=0; i<16; i++) {

		int changed = 1;
		int error = 0;

		if (dwc_otg_module_params.dev_perio_tx_fifo_size[i] == -1) {
			changed = 0;
			dwc_otg_module_params.dev_perio_tx_fifo_size[i] = dwc_param_dev_perio_tx_fifo_size_default;
		}
		if (!(dwc_otg_module_params.dev_perio_tx_fifo_size[i] <= (dwc_read_reg32(&core_if->core_global_regs->dptxfsiz_dieptxf[i])))) {
			if (changed) {
				DWC_ERROR("`%d' invalid for parameter `dev_perio_fifo_size_%d'.  Check HW configuration.\n", dwc_otg_module_params.dev_perio_tx_fifo_size[i],i);
				error = 1;
			}
			dwc_otg_module_params.dev_perio_tx_fifo_size[i] = dwc_read_reg32(&core_if->core_global_regs->dptxfsiz_dieptxf[i]);
		}
		retval += error;
	}

	retval += DWC_OTG_PARAM_CHECK_VALID(en_multiple_tx_fifo,
				"en_multiple_tx_fifo",
				((dwc_otg_module_params.en_multiple_tx_fifo == 1) &&
				(core_if->hwcfg4.b.ded_fifo_en == 0)) ? 0 : 1, 0);

	for (i = 0; i < 16; i++) {
		int changed = 1;
		int error = 0;
		if (dwc_otg_module_params.dev_tx_fifo_size[i] == -1) {
			changed = 0;
			dwc_otg_module_params.dev_tx_fifo_size[i] =
			    dwc_param_dev_tx_fifo_size_default;
		}
		if (!(dwc_otg_module_params.dev_tx_fifo_size[i] <=
		     (dwc_read_reg32(&core_if->core_global_regs->dptxfsiz_dieptxf[i])))) {
			if (changed) {
				DWC_ERROR("%d' invalid for parameter `dev_perio_fifo_size_%d'."
					"Check HW configuration.\n",dwc_otg_module_params.dev_tx_fifo_size[i],i);
				error = 1;
			}
			dwc_otg_module_params.dev_tx_fifo_size[i] =
			    dwc_read_reg32(&core_if->core_global_regs->dptxfsiz_dieptxf[i]);
		}
		retval += error;
	}
	DWC_OTG_PARAM_SET_DEFAULT(thr_ctl);
	DWC_OTG_PARAM_SET_DEFAULT(tx_thr_length);
	DWC_OTG_PARAM_SET_DEFAULT(rx_thr_length);
	return retval;
} // check_parameters 


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

	retval = dwc_otg_handle_common_intr( otg_dev->core_if );

	mask_and_ack_ifx_irq (_irq);
    
	return IRQ_RETVAL(retval);
}


/**
 * This function is called when a DWC_OTG device is unregistered with the
 * dwc_otg_driver. This happens, for example, when the rmmod command is
 * executed. The device may or may not be electrically present. If it is
 * present, the driver stops device processing. Any resources used on behalf
 * of this device are freed.
 *
 * @return
 */
static int
dwc_otg_driver_remove(struct platform_device *_dev)
{
    //dwc_otg_device_t *otg_dev = dev_get_drvdata(&_dev->dev);
    dwc_otg_device_t *otg_dev = platform_get_drvdata(_dev);

    DWC_DEBUGPL(DBG_ANY, "%s(%p)\n", __func__, _dev);

    if (otg_dev == NULL) {
        /* Memory allocation for the dwc_otg_device failed. */
        return 0;
    }

    /*
    * Free the IRQ 
    */
    if (otg_dev->common_irq_installed) {
        free_irq( otg_dev->irq, otg_dev );
    }

#ifndef DWC_DEVICE_ONLY
    if (otg_dev->hcd != NULL) {
        dwc_otg_hcd_remove(&_dev->dev);
    }
#endif
	printk("after removehcd\n");

// Note: Integrate HOST and DEVICE(Gadget) is not planned yet.
#ifndef DWC_HOST_ONLY
    if (otg_dev->pcd != NULL) {
        dwc_otg_pcd_remove(otg_dev);
    }
#endif
    if (otg_dev->core_if != NULL) {
        dwc_otg_cil_remove( otg_dev->core_if );
    }
	printk("after removecil\n");

    /*
     * Remove the device attributes
     */
    dwc_otg_attr_remove(&_dev->dev);
	printk("after removeattr\n");

    /*
     * Return the memory.
     */
    if (otg_dev->base != NULL) {
        iounmap(otg_dev->base);
    }
	if (otg_dev->phys_addr != 0) {
		release_mem_region(otg_dev->phys_addr, otg_dev->base_len);
	}
    kfree(otg_dev);
        
    /*
     * Clear the drvdata pointer.
     */
	//dev_set_drvdata(&_dev->dev, 0);
    platform_set_drvdata(_dev, 0);
    return 0;
}

/**
 * This function is called when an DWC_OTG device is bound to a
 * dwc_otg_driver. It creates the driver components required to
 * control the device (CIL, HCD, and PCD) and it initializes the
 * device. The driver components are stored in a dwc_otg_device
 * structure. A reference to the dwc_otg_device is saved in the
 * lm_device. This allows the driver to access the dwc_otg_device
 * structure on subsequent calls to driver methods for this device.
 *
 * @return
 */
static int __devinit
dwc_otg_driver_probe(struct platform_device *_dev)
{
	int retval = 0;
	dwc_otg_device_t *dwc_otg_device;
	int pin = (int)_dev->dev.platform_data;
	int32_t	snpsid;
	struct resource *res;
	gusbcfg_data_t usbcfg = {.d32 = 0};

	// GPIOs
	if(pin >= 0)
	{
		gpio_request(pin, "usb_power");
		gpio_direction_output(pin, 1);
		gpio_set_value(pin, 1);
		gpio_export(pin, 0);
	}
	dev_dbg(&_dev->dev, "dwc_otg_driver_probe (%p)\n", _dev);

    dwc_otg_device = kmalloc(sizeof(dwc_otg_device_t), GFP_KERNEL);
    if (dwc_otg_device == 0) {
        dev_err(&_dev->dev, "kmalloc of dwc_otg_device failed\n");
        retval = -ENOMEM;
        goto fail;
    }
    memset(dwc_otg_device, 0, sizeof(*dwc_otg_device));
    dwc_otg_device->reg_offset = 0xFFFFFFFF;

    /*
     * Retrieve the memory and IRQ resources.
     */
	dwc_otg_device->irq = platform_get_irq(_dev, 0);
	if (dwc_otg_device->irq == 0) {
		dev_err(&_dev->dev, "no device irq\n");
		retval = -ENODEV;
		goto fail;
	}
	dev_dbg(&_dev->dev, "OTG - device irq: %d\n", dwc_otg_device->irq);
	res = platform_get_resource(_dev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&_dev->dev, "no CSR address\n");
		retval = -ENODEV;
		goto fail;
	}
	dev_dbg(&_dev->dev, "OTG - ioresource_mem start0x%08x: end:0x%08x\n",
		(unsigned)res->start, (unsigned)res->end);
	dwc_otg_device->phys_addr = res->start;
	dwc_otg_device->base_len = res->end - res->start + 1;
	if (request_mem_region(dwc_otg_device->phys_addr, dwc_otg_device->base_len,
	    dwc_driver_name) == NULL) {
		dev_err(&_dev->dev, "request_mem_region failed\n");
		retval = -EBUSY;
		goto fail;
	}

	/*
     * Map the DWC_otg Core memory into virtual address space.
     */
    dwc_otg_device->base = ioremap_nocache(dwc_otg_device->phys_addr, dwc_otg_device->base_len);
    if (dwc_otg_device->base == NULL)    {
        dev_err(&_dev->dev, "ioremap() failed\n");
        retval = -ENOMEM;
        goto fail;
    }
    dev_dbg(&_dev->dev, "mapped base=0x%08x\n", (unsigned)dwc_otg_device->base);

    /*
     * Attempt to ensure this device is really a DWC_otg Controller.
     * Read and verify the SNPSID register contents. The value should be
     * 0x45F42XXX, which corresponds to "OT2", as in "OTG version 2.XX".
     */
    snpsid = dwc_read_reg32((uint32_t *)((uint8_t *)dwc_otg_device->base + 0x40));
    if ((snpsid & 0xFFFFF000) != 0x4F542000) {
        dev_err(&_dev->dev, "Bad value for SNPSID: 0x%08x\n", snpsid);
        retval = -EINVAL;
        goto fail;
    }

    /*
     * Initialize driver data to point to the global DWC_otg
     * Device structure.
     */
    platform_set_drvdata(_dev, dwc_otg_device);
    dev_dbg(&_dev->dev, "dwc_otg_device=0x%p\n", dwc_otg_device);
    dwc_otg_device->core_if = dwc_otg_cil_init( dwc_otg_device->base, &dwc_otg_module_params);
    if (dwc_otg_device->core_if == 0) {
        dev_err(&_dev->dev, "CIL initialization failed!\n");
        retval = -ENOMEM;
        goto fail;
    }
	
    /*
     * Validate parameter values.
     */
    if (check_parameters(dwc_otg_device->core_if) != 0) {
        retval = -EINVAL;
        goto fail;
    }

	/* Added for PLB DMA phys virt mapping */
	//dwc_otg_device->core_if->phys_addr = dwc_otg_device->phys_addr;
    /*
     * Create Device Attributes in sysfs
     */  
    dwc_otg_attr_create (&_dev->dev);

    /*
     * Disable the global interrupt until all the interrupt
     * handlers are installed.
     */
    dwc_otg_disable_global_interrupts( dwc_otg_device->core_if );
    /*
     * Install the interrupt handler for the common interrupts before
     * enabling common interrupts in core_init below.
     */
    DWC_DEBUGPL( DBG_CIL, "registering (common) handler for irq%d\n", dwc_otg_device->irq);

    retval = request_irq((unsigned int)dwc_otg_device->irq, dwc_otg_common_irq,
        //SA_INTERRUPT|SA_SHIRQ, "dwc_otg", (void *)dwc_otg_device );
        IRQF_SHARED, "dwc_otg", (void *)dwc_otg_device );
        //IRQF_DISABLED, "dwc_otg", (void *)dwc_otg_device );
    if (retval != 0) {
        DWC_ERROR("request of irq%d failed retval: %d\n", dwc_otg_device->irq, retval);
        retval = -EBUSY;
        goto fail;
    } else {
        dwc_otg_device->common_irq_installed = 1;
    }

    /*
     * Initialize the DWC_otg core.
     */
    dwc_otg_core_init( dwc_otg_device->core_if );


#ifndef DWC_HOST_ONLY  // otg device mode. (gadget.)
    /*
     * Initialize the PCD
     */
    retval = dwc_otg_pcd_init(dwc_otg_device);
    if (retval != 0) {
        DWC_ERROR("dwc_otg_pcd_init failed\n");
        dwc_otg_device->pcd = NULL;
        goto fail;
    }
#endif // DWC_HOST_ONLY

#ifndef DWC_DEVICE_ONLY // otg host mode. (HCD)
    /*
     * Initialize the HCD
     */
#if 1	/*fscz*/
	/* force_host_mode */
	usbcfg.d32 = dwc_read_reg32(&dwc_otg_device->core_if->core_global_regs ->gusbcfg);
	usbcfg.b.force_host_mode = 1;
	dwc_write_reg32(&dwc_otg_device->core_if->core_global_regs ->gusbcfg, usbcfg.d32);
#endif
    retval = dwc_otg_hcd_init(&_dev->dev, dwc_otg_device);
    if (retval != 0) {
        DWC_ERROR("dwc_otg_hcd_init failed\n");
        dwc_otg_device->hcd = NULL;
        goto fail;
    }
#endif // DWC_DEVICE_ONLY

    /*
     * Enable the global interrupt after all the interrupt
     * handlers are installed.
     */
    dwc_otg_enable_global_interrupts( dwc_otg_device->core_if );
#if 0	/*fscz*/
	usbcfg.d32 = dwc_read_reg32(&dwc_otg_device->core_if->core_global_regs ->gusbcfg);
	usbcfg.b.force_host_mode = 0;
	dwc_write_reg32(&dwc_otg_device->core_if->core_global_regs ->gusbcfg, usbcfg.d32);
#endif


    return 0;

fail:
    dwc_otg_driver_remove(_dev);
    return retval;
}

/** 
 * This structure defines the methods to be called by a bus driver
 * during the lifecycle of a device on that bus. Both drivers and
 * devices are registered with a bus driver. The bus driver matches
 * devices to drivers based on information in the device and driver
 * structures.
 *
 * The probe function is called when the bus driver matches a device
 * to this driver. The remove function is called when a device is
 * unregistered with the bus driver.
 */
struct platform_driver dwc_otg_driver = {
	.probe	= dwc_otg_driver_probe,
	.remove	= dwc_otg_driver_remove,
//	.suspend = dwc_otg_driver_suspend,
//	.resume = dwc_otg_driver_resume,
	.driver = {
		.name = dwc_driver_name,
		.owner = THIS_MODULE,
	},
};
EXPORT_SYMBOL(dwc_otg_driver);

/**
 * This function is called when the dwc_otg_driver is installed with the
 * insmod command. It registers the dwc_otg_driver structure with the
 * appropriate bus driver. This will cause the dwc_otg_driver_probe function
 * to be called. In addition, the bus driver will automatically expose
 * attributes defined for the device and driver in the special sysfs file
 * system.
 *
 * @return
 */
static int __init dwc_otg_init(void) 
{
    int retval = 0;

    printk(KERN_INFO "%s: version %s\n", dwc_driver_name, DWC_DRIVER_VERSION);

    if (ltq_is_ase())
        dwc_irq = LTQ_USB_ASE_INT;

	// ifxmips setup
    retval = ifx_usb_hc_init(dwc_iomem_base, dwc_irq);
    if (retval < 0)
    {
        printk(KERN_ERR "%s retval=%d\n", __func__, retval);
        return retval;
    }
    dwc_otg_power_on(); // ifx only!!


    retval = platform_driver_register(&dwc_otg_driver);

    if (retval < 0) {
        printk(KERN_ERR "%s retval=%d\n", __func__, retval);
        goto error1;
    }

    retval = driver_create_file(&dwc_otg_driver.driver, &driver_attr_version);
    if (retval < 0)
    {
        printk(KERN_ERR "%s retval=%d\n", __func__, retval);
        goto error2;
    }
    retval = driver_create_file(&dwc_otg_driver.driver, &driver_attr_debuglevel);
    if (retval < 0)
    {
        printk(KERN_ERR "%s retval=%d\n", __func__, retval);
        goto error3;
    }
    return retval;


error3:
    driver_remove_file(&dwc_otg_driver.driver, &driver_attr_version);
error2:
    driver_unregister(&dwc_otg_driver.driver);
error1:
    ifx_usb_hc_remove();
    return retval;
}
module_init(dwc_otg_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 dwc_otg_cleanup(void)
{
    printk(KERN_DEBUG "dwc_otg_cleanup()\n");

    driver_remove_file(&dwc_otg_driver.driver, &driver_attr_debuglevel);
    driver_remove_file(&dwc_otg_driver.driver, &driver_attr_version);

    platform_driver_unregister(&dwc_otg_driver);
    ifx_usb_hc_remove();

    printk(KERN_INFO "%s module removed\n", dwc_driver_name);
}
module_exit(dwc_otg_cleanup);

MODULE_DESCRIPTION(DWC_DRIVER_DESC);
MODULE_AUTHOR("Synopsys Inc.");
MODULE_LICENSE("GPL");

module_param_named(otg_cap, dwc_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, dwc_otg_module_params.opt, int, 0444);
MODULE_PARM_DESC(opt, "OPT Mode");
module_param_named(dma_enable, dwc_otg_module_params.dma_enable, int, 0444);
MODULE_PARM_DESC(dma_enable, "DMA Mode 0=Slave 1=DMA enabled");
module_param_named(dma_burst_size, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_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, dwc_otg_module_params.phy_type, int, 0444);
MODULE_PARM_DESC(phy_type, "0=Reserved 1=UTMI+ 2=ULPI");
module_param_named(phy_utmi_width, dwc_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, dwc_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, dwc_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, dwc_otg_module_params.i2c_enable, int, 0444);
MODULE_PARM_DESC(i2c_enable, "FS PHY Interface");
module_param_named(ulpi_fs_ls, dwc_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, dwc_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, "0");
module_param_named(en_multiple_tx_fifo,
		     dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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,
		    dwc_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, dwc_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, dwc_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, dwc_otg_module_params.rx_thr_length, int, 0444);
MODULE_PARM_DESC(rx_thr_length, "Rx Threshold length in 32 bit DWORDs");
module_param_named (iomem_base, dwc_iomem_base, ulong, 0444);
MODULE_PARM_DESC (dwc_iomem_base, "The base address of the DWC_OTG register.");
module_param_named (irq, dwc_irq, int, 0444);
MODULE_PARM_DESC (dwc_irq, "The interrupt number");

/** @page "Module Parameters"
 *
 * The following parameters may be specified when starting the module.
 * These parameters define how the DWC_otg controller should be
 * configured.  Parameter values are passed to the CIL initialization
 * function dwc_otg_cil_init
 *
 * Example: <code>modprobe dwc_otg speed=1 otg_cap=1</code>
 *
 
 <table>
 <tr><td>Parameter Name</td><td>Meaning</td></tr> 
 
 <tr>
 <td>otg_cap</td>
 <td>Specifies the OTG capabilities. The driver will automatically detect the
 value for this parameter if none is specified.
 - 0: HNP and SRP capable (default, if available)
 - 1: SRP Only capable
 - 2: No HNP/SRP capable
 </td></tr>
 
 <tr>
 <td>dma_enable</td>
 <td>Specifies whether to use slave or DMA mode for accessing the data FIFOs.
 The driver will automatically detect the value for this parameter if none is
 specified.
 - 0: Slave
 - 1: DMA (default, if available)
 </td></tr>
 
 <tr>
 <td>dma_burst_size</td>
 <td>The DMA Burst size (applicable only for External DMA Mode).
 - Values: 1, 4, 8 16, 32, 64, 128, 256 (default 32)
 </td></tr>
 
 <tr>
 <td>speed</td>
 <td>Specifies the maximum speed of operation in host and device mode. The
 actual speed depends on the speed of the attached device and the value of
 phy_type.
 - 0: High Speed (default)
 - 1: Full Speed
 </td></tr>
 
 <tr>
 <td>host_support_fs_ls_low_power</td>
 <td>Specifies whether low power mode is supported when attached to a Full
 Speed or Low Speed device in host mode.
 - 0: Don't support low power mode (default)
 - 1: Support low power mode
 </td></tr>
 
 <tr>
 <td>host_ls_low_power_phy_clk</td>
 <td>Specifies the PHY clock rate in low power mode when connected to a Low
 Speed device in host mode. This parameter is applicable only if
 HOST_SUPPORT_FS_LS_LOW_POWER is enabled.
 - 0: 48 MHz (default)
 - 1: 6 MHz
 </td></tr>
 
 <tr>
 <td>enable_dynamic_fifo</td>
 <td> Specifies whether FIFOs may be resized by the driver software.
 - 0: Use cC FIFO size parameters
 - 1: Allow dynamic FIFO sizing (default)
 </td></tr>
 
 <tr>
 <td>data_fifo_size</td>
 <td>Total number of 4-byte words in the data FIFO memory. This memory
 includes the Rx FIFO, non-periodic Tx FIFO, and periodic Tx FIFOs.
 - Values: 32 to 32768 (default 8192)

 Note: The total FIFO memory depth in the FPGA configuration is 8192.
 </td></tr>
 
 <tr>
 <td>dev_rx_fifo_size</td>
 <td>Number of 4-byte words in the Rx FIFO in device mode when dynamic
 FIFO sizing is enabled.
 - Values: 16 to 32768 (default 1064)
 </td></tr>
 
 <tr>
 <td>dev_nperio_tx_fifo_size</td>
 <td>Number of 4-byte words in the non-periodic Tx FIFO in device mode when
 dynamic FIFO sizing is enabled.
 - Values: 16 to 32768 (default 1024)
 </td></tr>
 
 <tr>
 <td>dev_perio_tx_fifo_size_n (n = 1 to 15)</td>
 <td>Number of 4-byte words in each of the periodic Tx FIFOs in device mode
 when dynamic FIFO sizing is enabled.
 - Values: 4 to 768 (default 256)
 </td></tr>
 
 <tr>
 <td>host_rx_fifo_size</td>
 <td>Number of 4-byte words in the Rx FIFO in host mode when dynamic FIFO
 sizing is enabled.
 - Values: 16 to 32768 (default 1024)
 </td></tr>
 
 <tr>
 <td>host_nperio_tx_fifo_size</td>
 <td>Number of 4-byte words in the non-periodic Tx FIFO in host mode when
 dynamic FIFO sizing is enabled in the core.
 - Values: 16 to 32768 (default 1024)
 </td></tr>
 
 <tr>
 <td>host_perio_tx_fifo_size</td>
 <td>Number of 4-byte words in the host periodic Tx FIFO when dynamic FIFO
 sizing is enabled.
 - Values: 16 to 32768 (default 1024)
 </td></tr>
 
 <tr>
 <td>max_transfer_size</td>
 <td>The maximum transfer size supported in bytes.
 - Values: 2047 to 65,535 (default 65,535)
 </td></tr>
 
 <tr>
 <td>max_packet_count</td>
 <td>The maximum number of packets in a transfer.
 - Values: 15 to 511 (default 511)
 </td></tr>
 
 <tr>
 <td>host_channels</td>
 <td>The number of host channel registers to use.
 - Values: 1 to 16 (default 12)

 Note: The FPGA configuration supports a maximum of 12 host channels.
 </td></tr>
 
 <tr>
 <td>dev_endpoints</td>
 <td>The number of endpoints in addition to EP0 available for device mode
 operations.
 - Values: 1 to 15 (default 6 IN and OUT)

 Note: The FPGA configuration supports a maximum of 6 IN and OUT endpoints in
 addition to EP0.
 </td></tr>
 
 <tr>
 <td>phy_type</td>
 <td>Specifies the type of PHY interface to use. By default, the driver will
 automatically detect the phy_type.
 - 0: Full Speed
 - 1: UTMI+ (default, if available)
 - 2: ULPI
 </td></tr>
 
 <tr>
 <td>phy_utmi_width</td>
 <td>Specifies the UTMI+ Data Width. This parameter is applicable for a
 phy_type of UTMI+. Also, this parameter is applicable only if the
 OTG_HSPHY_WIDTH cC parameter was set to "8 and 16 bits", meaning that the
 core has been configured to work at either data path width.
 - Values: 8 or 16 bits (default 16)
 </td></tr>
 
 <tr>
 <td>phy_ulpi_ddr</td>
 <td>Specifies whether the ULPI operates at double or single data rate. This
 parameter is only applicable if phy_type is ULPI.
 - 0: single data rate ULPI interface with 8 bit wide data bus (default)
 - 1: double data rate ULPI interface with 4 bit wide data bus
 </td></tr>

 <tr>
 <td>i2c_enable</td>
 <td>Specifies whether to use the I2C interface for full speed PHY. This
 parameter is only applicable if PHY_TYPE is FS.
 - 0: Disabled (default)
 - 1: Enabled
 </td></tr>

 <tr>
 <td>otg_en_multiple_tx_fifo</td>
 <td>Specifies whether dedicatedto tx fifos are enabled for non periodic IN EPs.
 The driver will automatically detect the value for this parameter if none is
 specified.
 - 0: Disabled
 - 1: Enabled (default, if available)
 </td></tr>

 <tr>
 <td>dev_tx_fifo_size_n (n = 1 to 15)</td>
 <td>Number of 4-byte words in each of the Tx FIFOs in device mode
 when dynamic FIFO sizing is enabled.
 - Values: 4 to 768 (default 256)
 </td></tr>

*/