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Pavel Machekd480ace2009-09-22 16:47:03 -07001/* 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>
Pavel Machek69fd8d22009-11-11 14:26:51 -080022#include <linux/sched.h>
Pavel Machekd480ace2009-09-22 16:47:03 -070023#include <linux/gpio.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Arnd Bergmann1ef21f62012-08-24 15:14:41 +020025#include <linux/platform_data/video-msm_fb.h>
Pavel Machekd480ace2009-09-22 16:47:03 -070026
27static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait);
28
29struct 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
39static void
40nt35399_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
54static 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
73static 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
93static 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
110static 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
121static 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
132irqreturn_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
148static 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 }
Jingoo Hanf8bd4932012-01-26 19:32:34 +0900158 ret = gpio_request_one(gpio, GPIOF_IN, "vsync");
Pavel Machekd480ace2009-09-22 16:47:03 -0700159 if (ret)
160 goto err_request_gpio_failed;
161
Pavel Machekd480ace2009-09-22 16:47:03 -0700162 ret = irq = gpio_to_irq(gpio);
163 if (ret < 0)
164 goto err_get_irq_num_failed;
165
166 ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING,
167 "vsync", panel);
168 if (ret)
169 goto err_request_irq_failed;
170
171 printk(KERN_INFO "vsync on gpio %d now %d\n",
172 gpio, gpio_get_value(gpio));
173 return 0;
174
175uninit:
176 free_irq(gpio_to_irq(gpio), panel->client_data);
177err_request_irq_failed:
178err_get_irq_num_failed:
Pavel Machekd480ace2009-09-22 16:47:03 -0700179 gpio_free(gpio);
180err_request_gpio_failed:
181 return ret;
182}
183
184static int mddi_nt35399_probe(struct platform_device *pdev)
185{
186 struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
187 struct msm_mddi_bridge_platform_data *bridge_data =
188 client_data->private_client_data;
189
190 int ret;
191
Damien Cassoua654dda2012-08-03 17:40:13 +0200192 struct panel_info *panel = devm_kzalloc(&pdev->dev,
193 sizeof(struct panel_info),
194 GFP_KERNEL);
Pavel Machekd480ace2009-09-22 16:47:03 -0700195
196 printk(KERN_DEBUG "%s: enter.\n", __func__);
197
198 if (!panel)
199 return -ENOMEM;
200 platform_set_drvdata(pdev, panel);
201
202 ret = setup_vsync(panel, 1);
203 if (ret) {
204 dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n");
205 return ret;
206 }
207
208 panel->client_data = client_data;
209 panel->panel_data.suspend = nt35399_suspend;
210 panel->panel_data.resume = nt35399_resume;
211 panel->panel_data.wait_vsync = nt35399_wait_vsync;
212 panel->panel_data.request_vsync = nt35399_request_vsync;
213 panel->panel_data.blank = nt35399_blank;
214 panel->panel_data.unblank = nt35399_unblank;
215 panel->panel_data.fb_data = &bridge_data->fb_data;
216 panel->panel_data.caps = 0;
217
218 panel->pdev.name = "msm_panel";
219 panel->pdev.id = pdev->id;
220 panel->pdev.resource = client_data->fb_resource;
221 panel->pdev.num_resources = 1;
222 panel->pdev.dev.platform_data = &panel->panel_data;
223
224 if (bridge_data->init)
225 bridge_data->init(bridge_data, client_data);
226
227 platform_device_register(&panel->pdev);
228
229 return 0;
230}
231
232static int mddi_nt35399_remove(struct platform_device *pdev)
233{
234 struct panel_info *panel = platform_get_drvdata(pdev);
235
236 setup_vsync(panel, 0);
Pavel Machekd480ace2009-09-22 16:47:03 -0700237 return 0;
238}
239
240static struct platform_driver mddi_client_0bda_8a47 = {
241 .probe = mddi_nt35399_probe,
242 .remove = mddi_nt35399_remove,
243 .driver = { .name = "mddi_c_0bda_8a47" },
244};
245
246static int __init mddi_client_nt35399_init(void)
247{
248 return platform_driver_register(&mddi_client_0bda_8a47);
249}
250
251module_init(mddi_client_nt35399_init);
252