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d480ace0 PM |
1 | /* drivers/video/msm_fb/mddi_client_toshiba.c |
2 | * | |
3 | * Support for Toshiba TC358720XBG mddi client devices which require no | |
4 | * special initialization code. | |
5 | * | |
6 | * Copyright (C) 2007 Google Incorporated | |
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> | |
22 | #include <linux/gpio.h> | |
69fd8d24 | 23 | #include <linux/sched.h> |
d480ace0 PM |
24 | #include <mach/msm_fb.h> |
25 | ||
26 | ||
27 | #define LCD_CONTROL_BLOCK_BASE 0x110000 | |
28 | #define CMN (LCD_CONTROL_BLOCK_BASE|0x10) | |
29 | #define INTFLG (LCD_CONTROL_BLOCK_BASE|0x18) | |
30 | #define HCYCLE (LCD_CONTROL_BLOCK_BASE|0x34) | |
31 | #define HDE_START (LCD_CONTROL_BLOCK_BASE|0x3C) | |
32 | #define VPOS (LCD_CONTROL_BLOCK_BASE|0xC0) | |
33 | #define MPLFBUF (LCD_CONTROL_BLOCK_BASE|0x20) | |
34 | #define WAKEUP (LCD_CONTROL_BLOCK_BASE|0x54) | |
35 | #define WSYN_DLY (LCD_CONTROL_BLOCK_BASE|0x58) | |
36 | #define REGENB (LCD_CONTROL_BLOCK_BASE|0x5C) | |
37 | ||
38 | #define BASE5 0x150000 | |
39 | #define BASE6 0x160000 | |
40 | #define BASE7 0x170000 | |
41 | ||
42 | #define GPIOIEV (BASE5 + 0x10) | |
43 | #define GPIOIE (BASE5 + 0x14) | |
44 | #define GPIORIS (BASE5 + 0x18) | |
45 | #define GPIOMIS (BASE5 + 0x1C) | |
46 | #define GPIOIC (BASE5 + 0x20) | |
47 | ||
48 | #define INTMASK (BASE6 + 0x0C) | |
49 | #define INTMASK_VWAKEOUT (1U << 0) | |
50 | #define INTMASK_VWAKEOUT_ACTIVE_LOW (1U << 8) | |
51 | #define GPIOSEL (BASE7 + 0x00) | |
52 | #define GPIOSEL_VWAKEINT (1U << 0) | |
53 | ||
54 | static DECLARE_WAIT_QUEUE_HEAD(toshiba_vsync_wait); | |
55 | ||
56 | struct panel_info { | |
57 | struct msm_mddi_client_data *client_data; | |
58 | struct platform_device pdev; | |
59 | struct msm_panel_data panel_data; | |
60 | struct msmfb_callback *toshiba_callback; | |
61 | int toshiba_got_int; | |
62 | }; | |
63 | ||
64 | ||
65 | static void toshiba_request_vsync(struct msm_panel_data *panel_data, | |
66 | struct msmfb_callback *callback) | |
67 | { | |
68 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
69 | panel_data); | |
70 | struct msm_mddi_client_data *client_data = panel->client_data; | |
71 | ||
72 | panel->toshiba_callback = callback; | |
73 | if (panel->toshiba_got_int) { | |
74 | panel->toshiba_got_int = 0; | |
75 | client_data->activate_link(client_data); | |
76 | } | |
77 | } | |
78 | ||
79 | static void toshiba_clear_vsync(struct msm_panel_data *panel_data) | |
80 | { | |
81 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
82 | panel_data); | |
83 | struct msm_mddi_client_data *client_data = panel->client_data; | |
84 | ||
85 | client_data->activate_link(client_data); | |
86 | } | |
87 | ||
88 | static void toshiba_wait_vsync(struct msm_panel_data *panel_data) | |
89 | { | |
90 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
91 | panel_data); | |
92 | struct msm_mddi_client_data *client_data = panel->client_data; | |
93 | ||
94 | if (panel->toshiba_got_int) { | |
95 | panel->toshiba_got_int = 0; | |
96 | client_data->activate_link(client_data); /* clears interrupt */ | |
97 | } | |
98 | if (wait_event_timeout(toshiba_vsync_wait, panel->toshiba_got_int, | |
99 | HZ/2) == 0) | |
100 | printk(KERN_ERR "timeout waiting for VSYNC\n"); | |
101 | panel->toshiba_got_int = 0; | |
102 | /* interrupt clears when screen dma starts */ | |
103 | } | |
104 | ||
105 | static int toshiba_suspend(struct msm_panel_data *panel_data) | |
106 | { | |
107 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
108 | panel_data); | |
109 | struct msm_mddi_client_data *client_data = panel->client_data; | |
110 | ||
111 | struct msm_mddi_bridge_platform_data *bridge_data = | |
112 | client_data->private_client_data; | |
113 | int ret; | |
114 | ||
115 | ret = bridge_data->uninit(bridge_data, client_data); | |
116 | if (ret) { | |
117 | printk(KERN_INFO "mddi toshiba client: non zero return from " | |
118 | "uninit\n"); | |
119 | return ret; | |
120 | } | |
121 | client_data->suspend(client_data); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int toshiba_resume(struct msm_panel_data *panel_data) | |
126 | { | |
127 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
128 | panel_data); | |
129 | struct msm_mddi_client_data *client_data = panel->client_data; | |
130 | ||
131 | struct msm_mddi_bridge_platform_data *bridge_data = | |
132 | client_data->private_client_data; | |
133 | int ret; | |
134 | ||
135 | client_data->resume(client_data); | |
136 | ret = bridge_data->init(bridge_data, client_data); | |
137 | if (ret) | |
138 | return ret; | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int toshiba_blank(struct msm_panel_data *panel_data) | |
143 | { | |
144 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
145 | panel_data); | |
146 | struct msm_mddi_client_data *client_data = panel->client_data; | |
147 | struct msm_mddi_bridge_platform_data *bridge_data = | |
148 | client_data->private_client_data; | |
149 | ||
150 | return bridge_data->blank(bridge_data, client_data); | |
151 | } | |
152 | ||
153 | static int toshiba_unblank(struct msm_panel_data *panel_data) | |
154 | { | |
155 | struct panel_info *panel = container_of(panel_data, struct panel_info, | |
156 | panel_data); | |
157 | struct msm_mddi_client_data *client_data = panel->client_data; | |
158 | struct msm_mddi_bridge_platform_data *bridge_data = | |
159 | client_data->private_client_data; | |
160 | ||
161 | return bridge_data->unblank(bridge_data, client_data); | |
162 | } | |
163 | ||
164 | irqreturn_t toshiba_vsync_interrupt(int irq, void *data) | |
165 | { | |
166 | struct panel_info *panel = data; | |
167 | ||
168 | panel->toshiba_got_int = 1; | |
169 | if (panel->toshiba_callback) { | |
170 | panel->toshiba_callback->func(panel->toshiba_callback); | |
171 | panel->toshiba_callback = 0; | |
172 | } | |
173 | wake_up(&toshiba_vsync_wait); | |
174 | return IRQ_HANDLED; | |
175 | } | |
176 | ||
177 | static int setup_vsync(struct panel_info *panel, | |
178 | int init) | |
179 | { | |
180 | int ret; | |
181 | int gpio = 97; | |
182 | unsigned int irq; | |
183 | ||
184 | if (!init) { | |
185 | ret = 0; | |
186 | goto uninit; | |
187 | } | |
188 | ret = gpio_request(gpio, "vsync"); | |
189 | if (ret) | |
190 | goto err_request_gpio_failed; | |
191 | ||
192 | ret = gpio_direction_input(gpio); | |
193 | if (ret) | |
194 | goto err_gpio_direction_input_failed; | |
195 | ||
196 | ret = irq = gpio_to_irq(gpio); | |
197 | if (ret < 0) | |
198 | goto err_get_irq_num_failed; | |
199 | ||
200 | ret = request_irq(irq, toshiba_vsync_interrupt, IRQF_TRIGGER_RISING, | |
201 | "vsync", panel); | |
202 | if (ret) | |
203 | goto err_request_irq_failed; | |
204 | printk(KERN_INFO "vsync on gpio %d now %d\n", | |
205 | gpio, gpio_get_value(gpio)); | |
206 | return 0; | |
207 | ||
208 | uninit: | |
209 | free_irq(gpio_to_irq(gpio), panel); | |
210 | err_request_irq_failed: | |
211 | err_get_irq_num_failed: | |
212 | err_gpio_direction_input_failed: | |
213 | gpio_free(gpio); | |
214 | err_request_gpio_failed: | |
215 | return ret; | |
216 | } | |
217 | ||
218 | static int mddi_toshiba_probe(struct platform_device *pdev) | |
219 | { | |
220 | int ret; | |
221 | struct msm_mddi_client_data *client_data = pdev->dev.platform_data; | |
222 | struct msm_mddi_bridge_platform_data *bridge_data = | |
223 | client_data->private_client_data; | |
224 | struct panel_info *panel = | |
225 | kzalloc(sizeof(struct panel_info), GFP_KERNEL); | |
226 | if (!panel) | |
227 | return -ENOMEM; | |
228 | platform_set_drvdata(pdev, panel); | |
229 | ||
230 | /* mddi_remote_write(mddi, 0, WAKEUP); */ | |
231 | client_data->remote_write(client_data, GPIOSEL_VWAKEINT, GPIOSEL); | |
232 | client_data->remote_write(client_data, INTMASK_VWAKEOUT, INTMASK); | |
233 | ||
234 | ret = setup_vsync(panel, 1); | |
235 | if (ret) { | |
236 | dev_err(&pdev->dev, "mddi_bridge_setup_vsync failed\n"); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | panel->client_data = client_data; | |
241 | panel->panel_data.suspend = toshiba_suspend; | |
242 | panel->panel_data.resume = toshiba_resume; | |
243 | panel->panel_data.wait_vsync = toshiba_wait_vsync; | |
244 | panel->panel_data.request_vsync = toshiba_request_vsync; | |
245 | panel->panel_data.clear_vsync = toshiba_clear_vsync; | |
246 | panel->panel_data.blank = toshiba_blank; | |
247 | panel->panel_data.unblank = toshiba_unblank; | |
248 | panel->panel_data.fb_data = &bridge_data->fb_data; | |
249 | panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES; | |
250 | ||
251 | panel->pdev.name = "msm_panel"; | |
252 | panel->pdev.id = pdev->id; | |
253 | panel->pdev.resource = client_data->fb_resource; | |
254 | panel->pdev.num_resources = 1; | |
255 | panel->pdev.dev.platform_data = &panel->panel_data; | |
256 | bridge_data->init(bridge_data, client_data); | |
257 | platform_device_register(&panel->pdev); | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | static int mddi_toshiba_remove(struct platform_device *pdev) | |
263 | { | |
264 | struct panel_info *panel = platform_get_drvdata(pdev); | |
265 | ||
266 | setup_vsync(panel, 0); | |
267 | kfree(panel); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static struct platform_driver mddi_client_d263_0000 = { | |
272 | .probe = mddi_toshiba_probe, | |
273 | .remove = mddi_toshiba_remove, | |
274 | .driver = { .name = "mddi_c_d263_0000" }, | |
275 | }; | |
276 | ||
277 | static int __init mddi_client_toshiba_init(void) | |
278 | { | |
279 | platform_driver_register(&mddi_client_d263_0000); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | module_init(mddi_client_toshiba_init); | |
284 |