[mirror_ubuntu-artful-kernel.git] / drivers / usb / dwc2 / platform.c

/*
 * 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/platform_device.h>

#include <linux/usb/of.h>

#include "core.h"
#include "hcd.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,
};

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,
};

/**
 * 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_hcd_remove(hsotg);
	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;
	int retval;
	int irq;

	if (usb_disabled())
		return -ENODEV;

	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;
	}

	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);

	spin_lock_init(&hsotg->lock);
	retval = dwc2_gadget_init(hsotg, irq);
	if (retval)
		return retval;
	retval = dwc2_hcd_init(hsotg, irq, params);
	if (retval)
		return retval;

	platform_set_drvdata(dev, hsotg);

	return retval;
}

static int dwc2_suspend(struct platform_device *dev, pm_message_t state)
{
	struct dwc2_hsotg *dwc2 = platform_get_drvdata(dev);
	int ret = 0;

	if (dwc2_is_device_mode(dwc2))
		ret = s3c_hsotg_suspend(dwc2);
	return ret;
}

static int dwc2_resume(struct platform_device *dev)
{
	struct dwc2_hsotg *dwc2 = platform_get_drvdata(dev);
	int ret = 0;

	if (dwc2_is_device_mode(dwc2))
		ret = s3c_hsotg_resume(dwc2);
	return ret;
}

static struct platform_driver dwc2_platform_driver = {
	.driver = {
		.name = dwc2_driver_name,
		.of_match_table = dwc2_of_match_table,
	},
	.probe = dwc2_driver_probe,
	.remove = dwc2_driver_remove,
	.suspend = dwc2_suspend,
	.resume = dwc2_resume,
};

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");
Commit	Line	Data
5b9974b1 MK	1	/*
	2	* platform.c - DesignWare HS OTG Controller platform driver
	3	*
	4	* Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions, and the following disclaimer,
	11	* without modification.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. The names of the above-listed copyright holders may not be used
	16	* to endorse or promote products derived from this software without
	17	* specific prior written permission.
	18	*
	19	* ALTERNATIVELY, this software may be distributed under the terms of the
	20	* GNU General Public License ("GPL") as published by the Free Software
	21	* Foundation; either version 2 of the License, or (at your option) any
	22	* later version.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
	25	* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	26	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	27	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	28	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	29	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	30	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	31	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	32	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	33	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	34	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	35	*/
	36
	37	#include <linux/kernel.h>
	38	#include <linux/module.h>
	39	#include <linux/slab.h>
	40	#include <linux/device.h>
	41	#include <linux/dma-mapping.h>
831eae69	42	#include <linux/of_device.h>
5b9974b1 MK	43	#include <linux/platform_device.h>
5b9974b1 MK	44
c0155b9d KY	45	#include <linux/usb/of.h>
c0155b9d KY	46
5b9974b1 MK	47	#include "core.h"
	48	#include "hcd.h"
	49
	50	static const char dwc2_driver_name[] = "dwc2";
	51
831eae69 SW	52	static const struct dwc2_core_params params_bcm2835 = {
	53	.otg_cap = 0, /* HNP/SRP capable */
	54	.otg_ver = 0, /* 1.3 */
	55	.dma_enable = 1,
	56	.dma_desc_enable = 0,
	57	.speed = 0, /* High Speed */
	58	.enable_dynamic_fifo = 1,
	59	.en_multiple_tx_fifo = 1,
	60	.host_rx_fifo_size = 774, /* 774 DWORDs */
	61	.host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
	62	.host_perio_tx_fifo_size = 512, /* 512 DWORDs */
	63	.max_transfer_size = 65535,
	64	.max_packet_count = 511,
	65	.host_channels = 8,
	66	.phy_type = 1, /* UTMI */
	67	.phy_utmi_width = 8, /* 8 bits */
	68	.phy_ulpi_ddr = 0, /* Single */
	69	.phy_ulpi_ext_vbus = 0,
	70	.i2c_enable = 0,
	71	.ulpi_fs_ls = 0,
	72	.host_support_fs_ls_low_power = 0,
	73	.host_ls_low_power_phy_clk = 0, /* 48 MHz */
	74	.ts_dline = 0,
	75	.reload_ctl = 0,
	76	.ahbcfg = 0x10,
58b179dc	77	.uframe_sched = 0,
831eae69 SW	78	};
831eae69 SW	79
95083146 KY	80	static const struct dwc2_core_params params_rk3066 = {
	81	.otg_cap = 2, /* non-HNP/non-SRP */
	82	.otg_ver = -1,
	83	.dma_enable = -1,
	84	.dma_desc_enable = 0,
	85	.speed = -1,
	86	.enable_dynamic_fifo = 1,
	87	.en_multiple_tx_fifo = -1,
	88	.host_rx_fifo_size = 520, /* 520 DWORDs */
	89	.host_nperio_tx_fifo_size = 128, /* 128 DWORDs */
	90	.host_perio_tx_fifo_size = 256, /* 256 DWORDs */
	91	.max_transfer_size = 65535,
	92	.max_packet_count = -1,
	93	.host_channels = -1,
	94	.phy_type = -1,
	95	.phy_utmi_width = -1,
	96	.phy_ulpi_ddr = -1,
	97	.phy_ulpi_ext_vbus = -1,
	98	.i2c_enable = -1,
	99	.ulpi_fs_ls = -1,
	100	.host_support_fs_ls_low_power = -1,
	101	.host_ls_low_power_phy_clk = -1,
	102	.ts_dline = -1,
	103	.reload_ctl = -1,
	104	.ahbcfg = 0x7, /* INCR16 */
	105	.uframe_sched = -1,
	106	};
	107
5b9974b1 MK	108	/**
	109	* dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
	110	* DWC_otg driver
	111	*
	112	* @dev: Platform device
	113	*
	114	* This routine is called, for example, when the rmmod command is executed. The
	115	* device may or may not be electrically present. If it is present, the driver
	116	* stops device processing. Any resources used on behalf of this device are
	117	* freed.
	118	*/
	119	static int dwc2_driver_remove(struct platform_device *dev)
	120	{
	121	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
	122
	123	dwc2_hcd_remove(hsotg);
117777b2	124	s3c_hsotg_remove(hsotg);
5b9974b1 MK	125
	126	return 0;
	127	}
	128
831eae69 SW	129	static const struct of_device_id dwc2_of_match_table[] = {
831eae69 SW	130	{ .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
95083146	131	{ .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
831eae69	132	{ .compatible = "snps,dwc2", .data = NULL },
117777b2	133	{ .compatible = "samsung,s3c6400-hsotg", .data = NULL},
831eae69 SW	134	{},
	135	};
	136	MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
	137
5b9974b1 MK	138	/**
	139	* dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
	140	* driver
	141	*
	142	* @dev: Platform device
	143	*
	144	* This routine creates the driver components required to control the device
	145	* (core, HCD, and PCD) and initializes the device. The driver components are
	146	* stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
	147	* in the device private data. This allows the driver to access the dwc2_hsotg
	148	* structure on subsequent calls to driver methods for this device.
	149	*/
	150	static int dwc2_driver_probe(struct platform_device *dev)
	151	{
831eae69 SW	152	const struct of_device_id *match;
	153	const struct dwc2_core_params *params;
	154	struct dwc2_core_params defparams;
5b9974b1 MK	155	struct dwc2_hsotg *hsotg;
	156	struct resource *res;
	157	int retval;
	158	int irq;
5b9974b1	159
861e0f5b AH	160	if (usb_disabled())
	161	return -ENODEV;
	162
831eae69 SW	163	match = of_match_device(dwc2_of_match_table, &dev->dev);
	164	if (match && match->data) {
	165	params = match->data;
	166	} else {
	167	/* Default all params to autodetect */
	168	dwc2_set_all_params(&defparams, -1);
	169	params = &defparams;
8b3e233e DN	170
	171	/*
	172	* Disable descriptor dma mode by default as the HW can support
	173	* it, but does not support it for SPLIT transactions.
	174	*/
	175	defparams.dma_desc_enable = 0;
831eae69	176	}
5b9974b1 MK	177
	178	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
	179	if (!hsotg)
	180	return -ENOMEM;
	181
	182	hsotg->dev = &dev->dev;
	183
642f2ecc MK	184	/*
	185	* Use reasonable defaults so platforms don't have to provide these.
	186	*/
	187	if (!dev->dev.dma_mask)
	188	dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
4cdbb4ff RK	189	retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
	190	if (retval)
	191	return retval;
642f2ecc	192
5b9974b1 MK	193	irq = platform_get_irq(dev, 0);
	194	if (irq < 0) {
	195	dev_err(&dev->dev, "missing IRQ resource\n");
097f2612	196	return irq;
5b9974b1 MK	197	}
	198
	199	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
5b9974b1 MK	200	hsotg->regs = devm_ioremap_resource(&dev->dev, res);
	201	if (IS_ERR(hsotg->regs))
	202	return PTR_ERR(hsotg->regs);
	203
	204	dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
	205	(unsigned long)res->start, hsotg->regs);
	206
c0155b9d KY	207	hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
c0155b9d KY	208
117777b2 DN	209	spin_lock_init(&hsotg->lock);
	210	retval = dwc2_gadget_init(hsotg, irq);
	211	if (retval)
	212	return retval;
831eae69	213	retval = dwc2_hcd_init(hsotg, irq, params);
5b9974b1 MK	214	if (retval)
	215	return retval;
	216
	217	platform_set_drvdata(dev, hsotg);
	218
	219	return retval;
	220	}
	221
117777b2 DN	222	static int dwc2_suspend(struct platform_device *dev, pm_message_t state)
	223	{
	224	struct dwc2_hsotg *dwc2 = platform_get_drvdata(dev);
	225	int ret = 0;
	226
	227	if (dwc2_is_device_mode(dwc2))
	228	ret = s3c_hsotg_suspend(dwc2);
	229	return ret;
	230	}
	231
	232	static int dwc2_resume(struct platform_device *dev)
	233	{
	234	struct dwc2_hsotg *dwc2 = platform_get_drvdata(dev);
	235	int ret = 0;
	236
	237	if (dwc2_is_device_mode(dwc2))
	238	ret = s3c_hsotg_resume(dwc2);
	239	return ret;
	240	}
	241
5b9974b1 MK	242	static struct platform_driver dwc2_platform_driver = {
5b9974b1 MK	243	.driver = {
1c126bc6	244	.name = dwc2_driver_name,
5b9974b1 MK	245	.of_match_table = dwc2_of_match_table,
	246	},
	247	.probe = dwc2_driver_probe,
	248	.remove = dwc2_driver_remove,
117777b2 DN	249	.suspend = dwc2_suspend,
117777b2 DN	250	.resume = dwc2_resume,
5b9974b1 MK	251	};
	252
	253	module_platform_driver(dwc2_platform_driver);
	254
	255	MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
	256	MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
	257	MODULE_LICENSE("Dual BSD/GPL");