drivers/usb/dwc2/platform.c - kernel/msm-4.19 - Gitiles

 /*
  * platform.c - DesignWare HS OTG Controller platform driver
  *
  * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The names of the above-listed copyright holders may not be used
  *    to endorse or promote products derived from this software without
  *    specific prior written permission.
  *
  * ALTERNATIVELY, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") as published by the Free Software
  * Foundation; either version 2 of the License, or (at your option) any
  * later version.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  * CONTRIBUTORS 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.
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/of_device.h>
 #include <linux/mutex.h>
 #include <linux/platform_device.h>

 #include <linux/usb/of.h>

 #include "core.h"
 #include "hcd.h"
 #include "debug.h"

 static const char dwc2_driver_name[] = "dwc2";

 static const struct dwc2_core_params params_bcm2835 = {
 	.otg_cap			= 0,	/* HNP/SRP capable */
 	.otg_ver			= 0,	/* 1.3 */
 	.dma_enable			= 1,
 	.dma_desc_enable		= 0,
 	.speed				= 0,	/* High Speed */
 	.enable_dynamic_fifo		= 1,
 	.en_multiple_tx_fifo		= 1,
 	.host_rx_fifo_size		= 774,	/* 774 DWORDs */
 	.host_nperio_tx_fifo_size	= 256,	/* 256 DWORDs */
 	.host_perio_tx_fifo_size	= 512,	/* 512 DWORDs */
 	.max_transfer_size		= 65535,
 	.max_packet_count		= 511,
 	.host_channels			= 8,
 	.phy_type			= 1,	/* UTMI */
 	.phy_utmi_width			= 8,	/* 8 bits */
 	.phy_ulpi_ddr			= 0,	/* Single */
 	.phy_ulpi_ext_vbus		= 0,
 	.i2c_enable			= 0,
 	.ulpi_fs_ls			= 0,
 	.host_support_fs_ls_low_power	= 0,
 	.host_ls_low_power_phy_clk	= 0,	/* 48 MHz */
 	.ts_dline			= 0,
 	.reload_ctl			= 0,
 	.ahbcfg				= 0x10,
 	.uframe_sched			= 0,
 	.external_id_pin_ctl		= -1,
 };

 static const struct dwc2_core_params params_rk3066 = {
 	.otg_cap			= 2,	/* non-HNP/non-SRP */
 	.otg_ver			= -1,
 	.dma_enable			= -1,
 	.dma_desc_enable		= 0,
 	.speed				= -1,
 	.enable_dynamic_fifo		= 1,
 	.en_multiple_tx_fifo		= -1,
 	.host_rx_fifo_size		= 520,	/* 520 DWORDs */
 	.host_nperio_tx_fifo_size	= 128,	/* 128 DWORDs */
 	.host_perio_tx_fifo_size	= 256,	/* 256 DWORDs */
 	.max_transfer_size		= 65535,
 	.max_packet_count		= -1,
 	.host_channels			= -1,
 	.phy_type			= -1,
 	.phy_utmi_width			= -1,
 	.phy_ulpi_ddr			= -1,
 	.phy_ulpi_ext_vbus		= -1,
 	.i2c_enable			= -1,
 	.ulpi_fs_ls			= -1,
 	.host_support_fs_ls_low_power	= -1,
 	.host_ls_low_power_phy_clk	= -1,
 	.ts_dline			= -1,
 	.reload_ctl			= -1,
 	.ahbcfg				= 0x7, /* INCR16 */
 	.uframe_sched			= -1,
 	.external_id_pin_ctl		= -1,
 };

 /**
  * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
  * DWC_otg driver
  *
  * @dev: Platform device
  *
  * This routine is called, 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.
  */
 static int dwc2_driver_remove(struct platform_device *dev)
 {
 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);

 	dwc2_debugfs_exit(hsotg);
 	if (hsotg->hcd_enabled)
 		dwc2_hcd_remove(hsotg);
 	if (hsotg->gadget_enabled)
 		s3c_hsotg_remove(hsotg);

 	return 0;
 }

 static const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
 	{ .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
 	{ .compatible = "snps,dwc2", .data = NULL },
 	{ .compatible = "samsung,s3c6400-hsotg", .data = NULL},
 	{},
 };
 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);

 /**
  * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
  * driver
  *
  * @dev: Platform device
  *
  * This routine creates the driver components required to control the device
  * (core, HCD, and PCD) and initializes the device. The driver components are
  * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
  * in the device private data. This allows the driver to access the dwc2_hsotg
  * structure on subsequent calls to driver methods for this device.
  */
 static int dwc2_driver_probe(struct platform_device *dev)
 {
 	const struct of_device_id *match;
 	const struct dwc2_core_params *params;
 	struct dwc2_core_params defparams;
 	struct dwc2_hsotg *hsotg;
 	struct resource *res;
 	struct phy *phy;
 	struct usb_phy *uphy;
 	int retval;
 	int irq;

 	match = of_match_device(dwc2_of_match_table, &dev->dev);
 	if (match && match->data) {
 		params = match->data;
 	} else {
 		/* Default all params to autodetect */
 		dwc2_set_all_params(&defparams, -1);
 		params = &defparams;

 		/*
 		 * Disable descriptor dma mode by default as the HW can support
 		 * it, but does not support it for SPLIT transactions.
 		 */
 		defparams.dma_desc_enable = 0;
 	}

 	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
 	if (!hsotg)
 		return -ENOMEM;

 	hsotg->dev = &dev->dev;

 	/*
 	 * Use reasonable defaults so platforms don't have to provide these.
 	 */
 	if (!dev->dev.dma_mask)
 		dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
 	retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
 	if (retval)
 		return retval;

 	irq = platform_get_irq(dev, 0);
 	if (irq < 0) {
 		dev_err(&dev->dev, "missing IRQ resource\n");
 		return irq;
 	}

 	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
 		irq);
 	retval = devm_request_irq(hsotg->dev, irq,
 				  dwc2_handle_common_intr, IRQF_SHARED,
 				  dev_name(hsotg->dev), hsotg);
 	if (retval)
 		return retval;

 	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	hsotg->regs = devm_ioremap_resource(&dev->dev, res);
 	if (IS_ERR(hsotg->regs))
 		return PTR_ERR(hsotg->regs);

 	dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
 		(unsigned long)res->start, hsotg->regs);

 	hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);

 	/*
 	 * Attempt to find a generic PHY, then look for an old style
 	 * USB PHY
 	 */
 	phy = devm_phy_get(&dev->dev, "usb2-phy");
 	if (IS_ERR(phy)) {
 		hsotg->phy = NULL;
 		uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
 		if (IS_ERR(uphy))
 			hsotg->uphy = NULL;
 		else
 			hsotg->uphy = uphy;
 	} else {
 		hsotg->phy = phy;
 		phy_power_on(hsotg->phy);
 		phy_init(hsotg->phy);
 	}

 	spin_lock_init(&hsotg->lock);
 	mutex_init(&hsotg->init_mutex);

 	if (hsotg->dr_mode != USB_DR_MODE_HOST) {
 		retval = dwc2_gadget_init(hsotg, irq);
 		if (retval)
 			return retval;
 		hsotg->gadget_enabled = 1;
 	}

 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
 		retval = dwc2_hcd_init(hsotg, irq, params);
 		if (retval) {
 			if (hsotg->gadget_enabled)
 				s3c_hsotg_remove(hsotg);
 			return retval;
 		}
 		hsotg->hcd_enabled = 1;
 	}

 	platform_set_drvdata(dev, hsotg);

 	dwc2_debugfs_init(hsotg);

 	return retval;
 }

 static int __maybe_unused dwc2_suspend(struct device *dev)
 {
 	struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
 	int ret = 0;

 	if (dwc2_is_device_mode(dwc2)) {
 		ret = s3c_hsotg_suspend(dwc2);
 	} else {
 		if (dwc2->lx_state == DWC2_L0)
 			return 0;
 		phy_exit(dwc2->phy);
 		phy_power_off(dwc2->phy);

 	}
 	return ret;
 }

 static int __maybe_unused dwc2_resume(struct device *dev)
 {
 	struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
 	int ret = 0;

 	if (dwc2_is_device_mode(dwc2)) {
 		ret = s3c_hsotg_resume(dwc2);
 	} else {
 		phy_power_on(dwc2->phy);
 		phy_init(dwc2->phy);

 	}
 	return ret;
 }

 static const struct dev_pm_ops dwc2_dev_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend, dwc2_resume)
 };

 static struct platform_driver dwc2_platform_driver = {
 	.driver = {
 		.name = dwc2_driver_name,
 		.of_match_table = dwc2_of_match_table,
 		.pm = &dwc2_dev_pm_ops,
 	},
 	.probe = dwc2_driver_probe,
 	.remove = dwc2_driver_remove,
 };

 module_platform_driver(dwc2_platform_driver);

 MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
 MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
 MODULE_LICENSE("Dual BSD/GPL");
	/*
	* platform.c - DesignWare HS OTG Controller platform driver
	*
	* Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions, and the following disclaimer,
	* without modification.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. The names of the above-listed copyright holders may not be used
	* to endorse or promote products derived from this software without
	* specific prior written permission.
	*
	* ALTERNATIVELY, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") as published by the Free Software
	* Foundation; either version 2 of the License, or (at your option) any
	* later version.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
	* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS 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.
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/device.h>
	#include <linux/dma-mapping.h>
	#include <linux/of_device.h>
	#include <linux/mutex.h>
	#include <linux/platform_device.h>

	#include <linux/usb/of.h>

	#include "core.h"
	#include "hcd.h"
	#include "debug.h"

	static const char dwc2_driver_name[] = "dwc2";

	static const struct dwc2_core_params params_bcm2835 = {
	.otg_cap = 0, /* HNP/SRP capable */
	.otg_ver = 0, /* 1.3 */
	.dma_enable = 1,
	.dma_desc_enable = 0,
	.speed = 0, /* High Speed */
	.enable_dynamic_fifo = 1,
	.en_multiple_tx_fifo = 1,
	.host_rx_fifo_size = 774, /* 774 DWORDs */
	.host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
	.host_perio_tx_fifo_size = 512, /* 512 DWORDs */
	.max_transfer_size = 65535,
	.max_packet_count = 511,
	.host_channels = 8,
	.phy_type = 1, /* UTMI */
	.phy_utmi_width = 8, /* 8 bits */
	.phy_ulpi_ddr = 0, /* Single */
	.phy_ulpi_ext_vbus = 0,
	.i2c_enable = 0,
	.ulpi_fs_ls = 0,
	.host_support_fs_ls_low_power = 0,
	.host_ls_low_power_phy_clk = 0, /* 48 MHz */
	.ts_dline = 0,
	.reload_ctl = 0,
	.ahbcfg = 0x10,
	.uframe_sched = 0,
	.external_id_pin_ctl = -1,
	};

	static const struct dwc2_core_params params_rk3066 = {
	.otg_cap = 2, /* non-HNP/non-SRP */
	.otg_ver = -1,
	.dma_enable = -1,
	.dma_desc_enable = 0,
	.speed = -1,
	.enable_dynamic_fifo = 1,
	.en_multiple_tx_fifo = -1,
	.host_rx_fifo_size = 520, /* 520 DWORDs */
	.host_nperio_tx_fifo_size = 128, /* 128 DWORDs */
	.host_perio_tx_fifo_size = 256, /* 256 DWORDs */
	.max_transfer_size = 65535,
	.max_packet_count = -1,
	.host_channels = -1,
	.phy_type = -1,
	.phy_utmi_width = -1,
	.phy_ulpi_ddr = -1,
	.phy_ulpi_ext_vbus = -1,
	.i2c_enable = -1,
	.ulpi_fs_ls = -1,
	.host_support_fs_ls_low_power = -1,
	.host_ls_low_power_phy_clk = -1,
	.ts_dline = -1,
	.reload_ctl = -1,
	.ahbcfg = 0x7, /* INCR16 */
	.uframe_sched = -1,
	.external_id_pin_ctl = -1,
	};

	/**
	* dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
	* DWC_otg driver
	*
	* @dev: Platform device
	*
	* This routine is called, 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.
	*/
	static int dwc2_driver_remove(struct platform_device *dev)
	{
	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);

	dwc2_debugfs_exit(hsotg);
	if (hsotg->hcd_enabled)
	dwc2_hcd_remove(hsotg);
	if (hsotg->gadget_enabled)
	s3c_hsotg_remove(hsotg);

	return 0;
	}

	static const struct of_device_id dwc2_of_match_table[] = {
	{ .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
	{ .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
	{ .compatible = "snps,dwc2", .data = NULL },
	{ .compatible = "samsung,s3c6400-hsotg", .data = NULL},
	{},
	};
	MODULE_DEVICE_TABLE(of, dwc2_of_match_table);

	/**
	* dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
	* driver
	*
	* @dev: Platform device
	*
	* This routine creates the driver components required to control the device
	* (core, HCD, and PCD) and initializes the device. The driver components are
	* stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
	* in the device private data. This allows the driver to access the dwc2_hsotg
	* structure on subsequent calls to driver methods for this device.
	*/
	static int dwc2_driver_probe(struct platform_device *dev)
	{
	const struct of_device_id *match;
	const struct dwc2_core_params *params;
	struct dwc2_core_params defparams;
	struct dwc2_hsotg *hsotg;
	struct resource *res;
	struct phy *phy;
	struct usb_phy *uphy;
	int retval;
	int irq;

	match = of_match_device(dwc2_of_match_table, &dev->dev);
	if (match && match->data) {
	params = match->data;
	} else {
	/* Default all params to autodetect */
	dwc2_set_all_params(&defparams, -1);
	params = &defparams;

	/*
	* Disable descriptor dma mode by default as the HW can support
	* it, but does not support it for SPLIT transactions.
	*/
	defparams.dma_desc_enable = 0;
	}

	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
	if (!hsotg)
	return -ENOMEM;

	hsotg->dev = &dev->dev;

	/*
	* Use reasonable defaults so platforms don't have to provide these.
	*/
	if (!dev->dev.dma_mask)
	dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
	retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
	if (retval)
	return retval;

	irq = platform_get_irq(dev, 0);
	if (irq < 0) {
	dev_err(&dev->dev, "missing IRQ resource\n");
	return irq;
	}

	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
	irq);
	retval = devm_request_irq(hsotg->dev, irq,
	dwc2_handle_common_intr, IRQF_SHARED,
	dev_name(hsotg->dev), hsotg);
	if (retval)
	return retval;

	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	hsotg->regs = devm_ioremap_resource(&dev->dev, res);
	if (IS_ERR(hsotg->regs))
	return PTR_ERR(hsotg->regs);

	dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
	(unsigned long)res->start, hsotg->regs);

	hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);

	/*
	* Attempt to find a generic PHY, then look for an old style
	* USB PHY
	*/
	phy = devm_phy_get(&dev->dev, "usb2-phy");
	if (IS_ERR(phy)) {
	hsotg->phy = NULL;
	uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
	if (IS_ERR(uphy))
	hsotg->uphy = NULL;
	else
	hsotg->uphy = uphy;
	} else {
	hsotg->phy = phy;
	phy_power_on(hsotg->phy);
	phy_init(hsotg->phy);
	}

	spin_lock_init(&hsotg->lock);
	mutex_init(&hsotg->init_mutex);

	if (hsotg->dr_mode != USB_DR_MODE_HOST) {
	retval = dwc2_gadget_init(hsotg, irq);
	if (retval)
	return retval;
	hsotg->gadget_enabled = 1;
	}

	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
	retval = dwc2_hcd_init(hsotg, irq, params);
	if (retval) {
	if (hsotg->gadget_enabled)
	s3c_hsotg_remove(hsotg);
	return retval;
	}
	hsotg->hcd_enabled = 1;
	}

	platform_set_drvdata(dev, hsotg);

	dwc2_debugfs_init(hsotg);

	return retval;
	}

	static int __maybe_unused dwc2_suspend(struct device *dev)
	{
	struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
	int ret = 0;

	if (dwc2_is_device_mode(dwc2)) {
	ret = s3c_hsotg_suspend(dwc2);
	} else {
	if (dwc2->lx_state == DWC2_L0)
	return 0;
	phy_exit(dwc2->phy);
	phy_power_off(dwc2->phy);

	}
	return ret;
	}

	static int __maybe_unused dwc2_resume(struct device *dev)
	{
	struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
	int ret = 0;

	if (dwc2_is_device_mode(dwc2)) {
	ret = s3c_hsotg_resume(dwc2);
	} else {
	phy_power_on(dwc2->phy);
	phy_init(dwc2->phy);

	}
	return ret;
	}

	static const struct dev_pm_ops dwc2_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend, dwc2_resume)
	};

	static struct platform_driver dwc2_platform_driver = {
	.driver = {
	.name = dwc2_driver_name,
	.of_match_table = dwc2_of_match_table,
	.pm = &dwc2_dev_pm_ops,
	},
	.probe = dwc2_driver_probe,
	.remove = dwc2_driver_remove,
	};

	module_platform_driver(dwc2_platform_driver);

	MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
	MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
	MODULE_LICENSE("Dual BSD/GPL");