[net-next-2.6.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 <linux/slab.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	23	#include <linux/gpio.h>
5a0e3ad6	24	#include <linux/slab.h>
d480ace0 PM	25	#include <mach/msm_fb.h>
	26
	27	static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait);
	28
	29	struct panel_info {
	30	struct msm_mddi_client_data *client_data;
	31	struct platform_device pdev;
	32	struct msm_panel_data panel_data;
	33	struct msmfb_callback *fb_callback;
	34	struct work_struct panel_work;
	35	struct workqueue_struct *fb_wq;
	36	int nt35399_got_int;
	37	};
	38
	39	static void
	40	nt35399_request_vsync(struct msm_panel_data *panel_data,
	41	struct msmfb_callback *callback)
	42	{
	43	struct panel_info *panel = container_of(panel_data, struct panel_info,
	44	panel_data);
	45	struct msm_mddi_client_data *client_data = panel->client_data;
	46
	47	panel->fb_callback = callback;
	48	if (panel->nt35399_got_int) {
	49	panel->nt35399_got_int = 0;
	50	client_data->activate_link(client_data); /* clears interrupt */
	51	}
	52	}
	53
	54	static void nt35399_wait_vsync(struct msm_panel_data *panel_data)
	55	{
	56	struct panel_info *panel = container_of(panel_data, struct panel_info,
	57	panel_data);
	58	struct msm_mddi_client_data *client_data = panel->client_data;
	59
	60	if (panel->nt35399_got_int) {
	61	panel->nt35399_got_int = 0;
	62	client_data->activate_link(client_data); /* clears interrupt */
	63	}
	64
	65	if (wait_event_timeout(nt35399_vsync_wait, panel->nt35399_got_int,
	66	HZ/2) == 0)
	67	printk(KERN_ERR "timeout waiting for VSYNC\n");
	68
	69	panel->nt35399_got_int = 0;
	70	/* interrupt clears when screen dma starts */
	71	}
	72
	73	static int nt35399_suspend(struct msm_panel_data *panel_data)
	74	{
	75	struct panel_info *panel = container_of(panel_data, struct panel_info,
	76	panel_data);
	77	struct msm_mddi_client_data *client_data = panel->client_data;
	78
	79	struct msm_mddi_bridge_platform_data *bridge_data =
	80	client_data->private_client_data;
	81	int ret;
	82
	83	ret = bridge_data->uninit(bridge_data, client_data);
	84	if (ret) {
	85	printk(KERN_INFO "mddi nt35399 client: non zero return from "
	86	"uninit\n");
	87	return ret;
	88	}
89	client_data->suspend(client_data);
90	return 0;
91	}
92
93	static int nt35399_resume(struct msm_panel_data *panel_data)
94	{
95	struct panel_info *panel = container_of(panel_data, struct panel_info,
96	panel_data);
97	struct msm_mddi_client_data *client_data = panel->client_data;
98
99	struct msm_mddi_bridge_platform_data *bridge_data =
100	client_data->private_client_data;
101	int ret;
102
103	client_data->resume(client_data);
104	ret = bridge_data->init(bridge_data, client_data);
105	if (ret)
106	return ret;
107	return 0;
108	}
109
110	static int nt35399_blank(struct msm_panel_data *panel_data)
111	{
112	struct panel_info *panel = container_of(panel_data, struct panel_info,
113	panel_data);
114	struct msm_mddi_client_data *client_data = panel->client_data;
115	struct msm_mddi_bridge_platform_data *bridge_data =
116	client_data->private_client_data;
117
118	return bridge_data->blank(bridge_data, client_data);
119	}
120
121	static int nt35399_unblank(struct msm_panel_data *panel_data)
122	{
123	struct panel_info *panel = container_of(panel_data, struct panel_info,
124	panel_data);
125	struct msm_mddi_client_data *client_data = panel->client_data;
126	struct msm_mddi_bridge_platform_data *bridge_data =
127	client_data->private_client_data;
128
129	return bridge_data->unblank(bridge_data, client_data);
130	}
131
132	irqreturn_t nt35399_vsync_interrupt(int irq, void *data)
133	{
134	struct panel_info *panel = data;
135
136	panel->nt35399_got_int = 1;
137
138	if (panel->fb_callback) {
139	panel->fb_callback->func(panel->fb_callback);
140	panel->fb_callback = NULL;
141	}
142
143	wake_up(&nt35399_vsync_wait);
144
145	return IRQ_HANDLED;
146	}
147
148	static int setup_vsync(struct panel_info *panel, int init)
149	{
150	int ret;
151	int gpio = 97;
152	unsigned int irq;
153
154	if (!init) {
155	ret = 0;
156	goto uninit;
157	}
158	ret = gpio_request(gpio, "vsync");
159	if (ret)
160	goto err_request_gpio_failed;
161
162	ret = gpio_direction_input(gpio);
163	if (ret)
164	goto err_gpio_direction_input_failed;
165
166	ret = irq = gpio_to_irq(gpio);
167	if (ret < 0)
168	goto err_get_irq_num_failed;
169
170	ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING,
171	"vsync", panel);
172	if (ret)
173	goto err_request_irq_failed;
174
175	printk(KERN_INFO "vsync on gpio %d now %d\n",
176	gpio, gpio_get_value(gpio));
177	return 0;
178
179	uninit:
180	free_irq(gpio_to_irq(gpio), panel->client_data);
181	err_request_irq_failed:
182	err_get_irq_num_failed:
183	err_gpio_direction_input_failed:
184	gpio_free(gpio);
185	err_request_gpio_failed:
186	return ret;
187	}
188
189	static int mddi_nt35399_probe(struct platform_device *pdev)
190	{
191	struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
192	struct msm_mddi_bridge_platform_data *bridge_data =
193	client_data->private_client_data;
194
195	int ret;
196
197	struct panel_info *panel = kzalloc(sizeof(struct panel_info),
198	GFP_KERNEL);
199
200	printk(KERN_DEBUG "%s: enter.\n", __func__);
201
202	if (!panel)
203	return -ENOMEM;
204	platform_set_drvdata(pdev, panel);
205
206	ret = setup_vsync(panel, 1);
207	if (ret) {
208	dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n");
209	return ret;
210	}
211
212	panel->client_data = client_data;
213	panel->panel_data.suspend = nt35399_suspend;
214	panel->panel_data.resume = nt35399_resume;
215	panel->panel_data.wait_vsync = nt35399_wait_vsync;
216	panel->panel_data.request_vsync = nt35399_request_vsync;
217	panel->panel_data.blank = nt35399_blank;
218	panel->panel_data.unblank = nt35399_unblank;
219	panel->panel_data.fb_data = &bridge_data->fb_data;
220	panel->panel_data.caps = 0;
221
222	panel->pdev.name = "msm_panel";
223	panel->pdev.id = pdev->id;
224	panel->pdev.resource = client_data->fb_resource;
225	panel->pdev.num_resources = 1;
226	panel->pdev.dev.platform_data = &panel->panel_data;
227
228	if (bridge_data->init)
229	bridge_data->init(bridge_data, client_data);
230
231	platform_device_register(&panel->pdev);
232
233	return 0;
234	}
235
236	static int mddi_nt35399_remove(struct platform_device *pdev)
237	{
238	struct panel_info *panel = platform_get_drvdata(pdev);
239
240	setup_vsync(panel, 0);
241	kfree(panel);
242	return 0;
243	}
244
245	static struct platform_driver mddi_client_0bda_8a47 = {
246	.probe = mddi_nt35399_probe,
247	.remove = mddi_nt35399_remove,
248	.driver = { .name = "mddi_c_0bda_8a47" },
249	};
250
251	static int __init mddi_client_nt35399_init(void)
252	{
253	return platform_driver_register(&mddi_client_0bda_8a47);
254	}
255
256	module_init(mddi_client_nt35399_init);
257