1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
  2 *
  3 * This program is free software; you can redistribute it and/or modify
  4 * it under the terms of the GNU General Public License version 2 and
  5 * only version 2 as published by the Free Software Foundation.
  6 *
  7 * This program is distributed in the hope that it will be useful,
  8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 10 * GNU General Public License for more details.
 11 *
 12 * You should have received a copy of the GNU General Public License
 13 * along with this program; if not, write to the Free Software
 14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 15 * 02110-1301, USA.
 16 *
 17 */
 18
 19#include <linux/module.h>
 20#include <linux/platform_device.h>
 21#include <linux/pm_runtime.h>
 22#include <linux/usb/msm_hsusb_hw.h>
 23#include <linux/usb/ulpi.h>
 24
 25#include "ci13xxx_udc.c"
 26
 27#define MSM_USB_BASE	(udc->regs)
 28
 29static irqreturn_t msm_udc_irq(int irq, void *data)
 30{
 31	return udc_irq();
 32}
 33
 34static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
 35{
 36	struct device *dev = udc->gadget.dev.parent;
 37	int val;
 38
 39	switch (event) {
 40	case CI13XXX_CONTROLLER_RESET_EVENT:
 41		dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
 42		writel(0, USB_AHBBURST);
 43		writel(0, USB_AHBMODE);
 44		break;
 45	case CI13XXX_CONTROLLER_STOPPED_EVENT:
 46		dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n");
 47		/*
 48		 * Put the transceiver in non-driving mode. Otherwise host
 49		 * may not detect soft-disconnection.
 50		 */
 51		val = otg_io_read(udc->transceiver, ULPI_FUNC_CTRL);
 52		val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
 53		val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
 54		otg_io_write(udc->transceiver, val, ULPI_FUNC_CTRL);
 55		break;
 56	default:
 57		dev_dbg(dev, "unknown ci13xxx_udc event\n");
 58		break;
 59	}
 60}
 61
 62static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
 63	.name			= "ci13xxx_msm",
 64	.flags			= CI13XXX_REGS_SHARED |
 65				  CI13XXX_REQUIRE_TRANSCEIVER |
 66				  CI13XXX_PULLUP_ON_VBUS |
 67				  CI13XXX_DISABLE_STREAMING,
 68
 69	.notify_event		= ci13xxx_msm_notify_event,
 70};
 71
 72static int ci13xxx_msm_probe(struct platform_device *pdev)
 73{
 74	struct resource *res;
 75	void __iomem *regs;
 76	int irq;
 77	int ret;
 78
 79	dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");
 80
 81	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 82	if (!res) {
 83		dev_err(&pdev->dev, "failed to get platform resource mem\n");
 84		return -ENXIO;
 85	}
 86
 87	regs = ioremap(res->start, resource_size(res));
 88	if (!regs) {
 89		dev_err(&pdev->dev, "ioremap failed\n");
 90		return -ENOMEM;
 91	}
 92
 93	ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, regs);
 94	if (ret < 0) {
 95		dev_err(&pdev->dev, "udc_probe failed\n");
 96		goto iounmap;
 97	}
 98
 99	irq = platform_get_irq(pdev, 0);
100	if (irq < 0) {
101		dev_err(&pdev->dev, "IRQ not found\n");
102		ret = -ENXIO;
103		goto udc_remove;
104	}
105
106	ret = request_irq(irq, msm_udc_irq, IRQF_SHARED, pdev->name, pdev);
107	if (ret < 0) {
108		dev_err(&pdev->dev, "request_irq failed\n");
109		goto udc_remove;
110	}
111
112	pm_runtime_no_callbacks(&pdev->dev);
113	pm_runtime_enable(&pdev->dev);
114
115	return 0;
116
117udc_remove:
118	udc_remove();
119iounmap:
120	iounmap(regs);
121
122	return ret;
123}
124
125static struct platform_driver ci13xxx_msm_driver = {
126	.probe = ci13xxx_msm_probe,
127	.driver = { .name = "msm_hsusb", },
128};
129MODULE_ALIAS("platform:msm_hsusb");
130
131static int __init ci13xxx_msm_init(void)
132{
133	return platform_driver_register(&ci13xxx_msm_driver);
134}
135module_init(ci13xxx_msm_init);