[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / msm / mddi_client_nt35399.c

/* drivers/video/msm_fb/mddi_client_nt35399.c
 *
 * Support for Novatek NT35399 MDDI client of Sapphire
 *
 * Copyright (C) 2008 HTC Incorporated
 * Author: Solomon Chiu (solomon_chiu@htc.com)
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/gpio.h>
#include <mach/msm_fb.h>

static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait);

struct panel_info {
	struct msm_mddi_client_data *client_data;
	struct platform_device pdev;
	struct msm_panel_data panel_data;
	struct msmfb_callback *fb_callback;
	struct work_struct panel_work;
	struct workqueue_struct *fb_wq;
	int nt35399_got_int;
};

static void
nt35399_request_vsync(struct msm_panel_data *panel_data,
		      struct msmfb_callback *callback)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	panel->fb_callback = callback;
	if (panel->nt35399_got_int) {
		panel->nt35399_got_int = 0;
		client_data->activate_link(client_data); /* clears interrupt */
	}
}

static void nt35399_wait_vsync(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	if (panel->nt35399_got_int) {
		panel->nt35399_got_int = 0;
		client_data->activate_link(client_data); /* clears interrupt */
	}

	if (wait_event_timeout(nt35399_vsync_wait, panel->nt35399_got_int,
				HZ/2) == 0)
		printk(KERN_ERR "timeout waiting for VSYNC\n");

	panel->nt35399_got_int = 0;
	/* interrupt clears when screen dma starts */
}

static int nt35399_suspend(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;
	int ret;

	ret = bridge_data->uninit(bridge_data, client_data);
	if (ret) {
		printk(KERN_INFO "mddi nt35399 client: non zero return from "
			"uninit\n");
		return ret;
	}
	client_data->suspend(client_data);
	return 0;
}

static int nt35399_resume(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;

	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;
	int ret;

	client_data->resume(client_data);
	ret = bridge_data->init(bridge_data, client_data);
	if (ret)
		return ret;
	return 0;
}

static int nt35399_blank(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;
	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;

	return bridge_data->blank(bridge_data, client_data);
}

static int nt35399_unblank(struct msm_panel_data *panel_data)
{
	struct panel_info *panel = container_of(panel_data, struct panel_info,
						panel_data);
	struct msm_mddi_client_data *client_data = panel->client_data;
	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;

	return bridge_data->unblank(bridge_data, client_data);
}

irqreturn_t nt35399_vsync_interrupt(int irq, void *data)
{
	struct panel_info *panel = data;

	panel->nt35399_got_int = 1;

	if (panel->fb_callback) {
		panel->fb_callback->func(panel->fb_callback);
		panel->fb_callback = NULL;
	}

	wake_up(&nt35399_vsync_wait);

	return IRQ_HANDLED;
}

static int setup_vsync(struct panel_info *panel, int init)
{
	int ret;
	int gpio = 97;
	unsigned int irq;

	if (!init) {
		ret = 0;
		goto uninit;
	}
	ret = gpio_request(gpio, "vsync");
	if (ret)
		goto err_request_gpio_failed;

	ret = gpio_direction_input(gpio);
	if (ret)
		goto err_gpio_direction_input_failed;

	ret = irq = gpio_to_irq(gpio);
	if (ret < 0)
		goto err_get_irq_num_failed;

	ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING,
			  "vsync", panel);
	if (ret)
		goto err_request_irq_failed;

	printk(KERN_INFO "vsync on gpio %d now %d\n",
	       gpio, gpio_get_value(gpio));
	return 0;

uninit:
	free_irq(gpio_to_irq(gpio), panel->client_data);
err_request_irq_failed:
err_get_irq_num_failed:
err_gpio_direction_input_failed:
	gpio_free(gpio);
err_request_gpio_failed:
	return ret;
}

static int mddi_nt35399_probe(struct platform_device *pdev)
{
	struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
	struct msm_mddi_bridge_platform_data *bridge_data =
		client_data->private_client_data;

	int ret;

	struct panel_info *panel = kzalloc(sizeof(struct panel_info),
					   GFP_KERNEL);

	printk(KERN_DEBUG "%s: enter.\n", __func__);

	if (!panel)
		return -ENOMEM;
	platform_set_drvdata(pdev, panel);

	ret = setup_vsync(panel, 1);
	if (ret) {
		dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n");
		return ret;
	}

	panel->client_data = client_data;
	panel->panel_data.suspend = nt35399_suspend;
	panel->panel_data.resume = nt35399_resume;
	panel->panel_data.wait_vsync = nt35399_wait_vsync;
	panel->panel_data.request_vsync = nt35399_request_vsync;
	panel->panel_data.blank = nt35399_blank;
	panel->panel_data.unblank = nt35399_unblank;
	panel->panel_data.fb_data = &bridge_data->fb_data;
	panel->panel_data.caps = 0;

	panel->pdev.name = "msm_panel";
	panel->pdev.id = pdev->id;
	panel->pdev.resource = client_data->fb_resource;
	panel->pdev.num_resources = 1;
	panel->pdev.dev.platform_data = &panel->panel_data;

	if (bridge_data->init)
		bridge_data->init(bridge_data, client_data);

	platform_device_register(&panel->pdev);

	return 0;
}

static int mddi_nt35399_remove(struct platform_device *pdev)
{
	struct panel_info *panel = platform_get_drvdata(pdev);

	setup_vsync(panel, 0);
	kfree(panel);
	return 0;
}

static struct platform_driver mddi_client_0bda_8a47 = {
	.probe = mddi_nt35399_probe,
	.remove = mddi_nt35399_remove,
	.driver = { .name = "mddi_c_0bda_8a47" },
};

static int __init mddi_client_nt35399_init(void)
{
	return platform_driver_register(&mddi_client_0bda_8a47);
}

module_init(mddi_client_nt35399_init);
Commit	Line	Data
d480ace0 PM	1	/* drivers/video/msm_fb/mddi_client_nt35399.c
	2	*
	3	* Support for Novatek NT35399 MDDI client of Sapphire
	4	*
	5	* Copyright (C) 2008 HTC Incorporated
	6	* Author: Solomon Chiu (solomon_chiu@htc.com)
	7	*
	8	* This software is licensed under the terms of the GNU General Public
	9	* License version 2, as published by the Free Software Foundation, and
	10	* may be copied, distributed, and modified under those terms.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/kernel.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/interrupt.h>
69fd8d24	22	#include <linux/sched.h>
d480ace0 PM	23	#include <linux/gpio.h>
	24	#include <mach/msm_fb.h>
	25
	26	static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait);
	27
	28	struct panel_info {
	29	struct msm_mddi_client_data *client_data;
	30	struct platform_device pdev;
	31	struct msm_panel_data panel_data;
	32	struct msmfb_callback *fb_callback;
	33	struct work_struct panel_work;
	34	struct workqueue_struct *fb_wq;
	35	int nt35399_got_int;
	36	};
	37
	38	static void
	39	nt35399_request_vsync(struct msm_panel_data *panel_data,
	40	struct msmfb_callback *callback)
	41	{
	42	struct panel_info *panel = container_of(panel_data, struct panel_info,
	43	panel_data);
	44	struct msm_mddi_client_data *client_data = panel->client_data;
	45
	46	panel->fb_callback = callback;
	47	if (panel->nt35399_got_int) {
	48	panel->nt35399_got_int = 0;
	49	client_data->activate_link(client_data); /* clears interrupt */
	50	}
	51	}
	52
	53	static void nt35399_wait_vsync(struct msm_panel_data *panel_data)
	54	{
	55	struct panel_info *panel = container_of(panel_data, struct panel_info,
	56	panel_data);
	57	struct msm_mddi_client_data *client_data = panel->client_data;
	58
	59	if (panel->nt35399_got_int) {
	60	panel->nt35399_got_int = 0;
	61	client_data->activate_link(client_data); /* clears interrupt */
	62	}
	63
	64	if (wait_event_timeout(nt35399_vsync_wait, panel->nt35399_got_int,
	65	HZ/2) == 0)
	66	printk(KERN_ERR "timeout waiting for VSYNC\n");
	67
	68	panel->nt35399_got_int = 0;
	69	/* interrupt clears when screen dma starts */
	70	}
	71
	72	static int nt35399_suspend(struct msm_panel_data *panel_data)
	73	{
	74	struct panel_info *panel = container_of(panel_data, struct panel_info,
	75	panel_data);
	76	struct msm_mddi_client_data *client_data = panel->client_data;
	77
	78	struct msm_mddi_bridge_platform_data *bridge_data =
	79	client_data->private_client_data;
	80	int ret;
	81
	82	ret = bridge_data->uninit(bridge_data, client_data);
	83	if (ret) {
	84	printk(KERN_INFO "mddi nt35399 client: non zero return from "
	85	"uninit\n");
	86	return ret;
87	}
88	client_data->suspend(client_data);
89	return 0;
90	}
91
92	static int nt35399_resume(struct msm_panel_data *panel_data)
93	{
94	struct panel_info *panel = container_of(panel_data, struct panel_info,
95	panel_data);
96	struct msm_mddi_client_data *client_data = panel->client_data;
97
98	struct msm_mddi_bridge_platform_data *bridge_data =
99	client_data->private_client_data;
100	int ret;
101
102	client_data->resume(client_data);
103	ret = bridge_data->init(bridge_data, client_data);
104	if (ret)
105	return ret;
106	return 0;
107	}
108
109	static int nt35399_blank(struct msm_panel_data *panel_data)
110	{
111	struct panel_info *panel = container_of(panel_data, struct panel_info,
112	panel_data);
113	struct msm_mddi_client_data *client_data = panel->client_data;
114	struct msm_mddi_bridge_platform_data *bridge_data =
115	client_data->private_client_data;
116
117	return bridge_data->blank(bridge_data, client_data);
118	}
119
120	static int nt35399_unblank(struct msm_panel_data *panel_data)
121	{
122	struct panel_info *panel = container_of(panel_data, struct panel_info,
123	panel_data);
124	struct msm_mddi_client_data *client_data = panel->client_data;
125	struct msm_mddi_bridge_platform_data *bridge_data =
126	client_data->private_client_data;
127
128	return bridge_data->unblank(bridge_data, client_data);
129	}
130
131	irqreturn_t nt35399_vsync_interrupt(int irq, void *data)
132	{
133	struct panel_info *panel = data;
134
135	panel->nt35399_got_int = 1;
136
137	if (panel->fb_callback) {
138	panel->fb_callback->func(panel->fb_callback);
139	panel->fb_callback = NULL;
140	}
141
142	wake_up(&nt35399_vsync_wait);
143
144	return IRQ_HANDLED;
145	}
146
147	static int setup_vsync(struct panel_info *panel, int init)
148	{
149	int ret;
150	int gpio = 97;
151	unsigned int irq;
152
153	if (!init) {
154	ret = 0;
155	goto uninit;
156	}
157	ret = gpio_request(gpio, "vsync");
158	if (ret)
159	goto err_request_gpio_failed;
160
161	ret = gpio_direction_input(gpio);
162	if (ret)
163	goto err_gpio_direction_input_failed;
164
165	ret = irq = gpio_to_irq(gpio);
166	if (ret < 0)
167	goto err_get_irq_num_failed;
168
169	ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING,
170	"vsync", panel);
171	if (ret)
172	goto err_request_irq_failed;
173
174	printk(KERN_INFO "vsync on gpio %d now %d\n",
175	gpio, gpio_get_value(gpio));
176	return 0;
177
178	uninit:
179	free_irq(gpio_to_irq(gpio), panel->client_data);
180	err_request_irq_failed:
181	err_get_irq_num_failed:
182	err_gpio_direction_input_failed:
183	gpio_free(gpio);
184	err_request_gpio_failed:
185	return ret;
186	}
187
188	static int mddi_nt35399_probe(struct platform_device *pdev)
189	{
190	struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
191	struct msm_mddi_bridge_platform_data *bridge_data =
192	client_data->private_client_data;
193
194	int ret;
195
196	struct panel_info *panel = kzalloc(sizeof(struct panel_info),
197	GFP_KERNEL);
198
199	printk(KERN_DEBUG "%s: enter.\n", __func__);
200
201	if (!panel)
202	return -ENOMEM;
203	platform_set_drvdata(pdev, panel);
204
205	ret = setup_vsync(panel, 1);
206	if (ret) {
207	dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n");
208	return ret;
209	}
210
211	panel->client_data = client_data;
212	panel->panel_data.suspend = nt35399_suspend;
213	panel->panel_data.resume = nt35399_resume;
214	panel->panel_data.wait_vsync = nt35399_wait_vsync;
215	panel->panel_data.request_vsync = nt35399_request_vsync;
216	panel->panel_data.blank = nt35399_blank;
217	panel->panel_data.unblank = nt35399_unblank;
218	panel->panel_data.fb_data = &bridge_data->fb_data;
219	panel->panel_data.caps = 0;
220
221	panel->pdev.name = "msm_panel";
222	panel->pdev.id = pdev->id;
223	panel->pdev.resource = client_data->fb_resource;
224	panel->pdev.num_resources = 1;
225	panel->pdev.dev.platform_data = &panel->panel_data;
226
227	if (bridge_data->init)
228	bridge_data->init(bridge_data, client_data);
229
230	platform_device_register(&panel->pdev);
231
232	return 0;
233	}
234
235	static int mddi_nt35399_remove(struct platform_device *pdev)
236	{
237	struct panel_info *panel = platform_get_drvdata(pdev);
238
239	setup_vsync(panel, 0);
240	kfree(panel);
241	return 0;
242	}
243
244	static struct platform_driver mddi_client_0bda_8a47 = {
245	.probe = mddi_nt35399_probe,
246	.remove = mddi_nt35399_remove,
247	.driver = { .name = "mddi_c_0bda_8a47" },
248	};
249
250	static int __init mddi_client_nt35399_init(void)
251	{
252	return platform_driver_register(&mddi_client_0bda_8a47);
253	}
254
255	module_init(mddi_client_nt35399_init);
256