3 * picodlp_i2c_driver: i2c_client driver
5 * Copyright (C) 2009-2011 Texas Instruments
6 * Author: Mythri P K <mythripk@ti.com>
7 * Mayuresh Janorkar <mayur@ti.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * You should have received a copy of the GNU General Public License along with
19 * this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <linux/module.h>
23 #include <linux/input.h>
24 #include <linux/platform_device.h>
25 #include <linux/interrupt.h>
26 #include <linux/firmware.h>
27 #include <linux/slab.h>
28 #include <linux/mutex.h>
29 #include <linux/i2c.h>
30 #include <linux/delay.h>
31 #include <linux/gpio.h>
33 #include <video/omapdss.h>
34 #include <video/omap-panel-picodlp.h>
36 #include "panel-picodlp.h"
40 struct i2c_client *picodlp_i2c_client;
43 static struct i2c_board_info picodlp_i2c_board_info = {
44 I2C_BOARD_INFO("picodlp_i2c_driver", 0x1b),
47 struct picodlp_i2c_data {
48 struct mutex xfer_lock;
51 static struct i2c_device_id picodlp_i2c_id[] = {
52 { "picodlp_i2c_driver", 0 },
55 struct picodlp_i2c_command {
60 static struct omap_video_timings pico_ls_timings = {
74 static inline struct picodlp_panel_data
75 *get_panel_data(const struct omap_dss_device *dssdev)
77 return (struct picodlp_panel_data *) dssdev->data;
80 static u32 picodlp_i2c_read(struct i2c_client *client, u8 reg)
82 u8 read_cmd[] = {READ_REG_SELECT, reg}, data[4];
83 struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client);
84 struct i2c_msg msg[2];
86 mutex_lock(&picodlp_i2c_data->xfer_lock);
88 msg[0].addr = client->addr;
91 msg[0].buf = read_cmd;
93 msg[1].addr = client->addr;
94 msg[1].flags = I2C_M_RD;
98 i2c_transfer(client->adapter, msg, 2);
99 mutex_unlock(&picodlp_i2c_data->xfer_lock);
100 return (data[3] | (data[2] << 8) | (data[1] << 16) | (data[0] << 24));
103 static int picodlp_i2c_write_block(struct i2c_client *client,
107 int i, r, msg_count = 1;
109 struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client);
111 if (len < 1 || len > 32) {
112 dev_err(&client->dev,
113 "too long syn_write_block len %d\n", len);
116 mutex_lock(&picodlp_i2c_data->xfer_lock);
118 msg.addr = client->addr;
122 r = i2c_transfer(client->adapter, &msg, msg_count);
123 mutex_unlock(&picodlp_i2c_data->xfer_lock);
126 * i2c_transfer returns:
127 * number of messages sent in case of success
128 * a negative error number in case of failure
133 /* In case of success */
134 for (i = 0; i < len; i++)
135 dev_dbg(&client->dev,
136 "addr %x bw 0x%02x[%d]: 0x%02x\n",
137 client->addr, data[0] + i, i, data[i]);
141 dev_err(&client->dev, "picodlp_i2c_write error\n");
145 static int picodlp_i2c_write(struct i2c_client *client, u8 reg, u32 value)
151 for (i = 1; i < 5; i++)
152 data[i] = (value >> (32 - (i) * 8)) & 0xFF;
154 return picodlp_i2c_write_block(client, data, 5);
157 static int picodlp_i2c_write_array(struct i2c_client *client,
158 const struct picodlp_i2c_command commands[],
162 for (i = 0; i < count; i++) {
163 r = picodlp_i2c_write(client, commands[i].reg,
171 static int picodlp_wait_for_dma_done(struct i2c_client *client)
179 } while (picodlp_i2c_read(client, MAIN_STATUS) & DMA_STATUS);
185 * picodlp_i2c_init: i2c_initialization routine
186 * client: i2c_client for communication
189 * 0 : Success, no error
190 * error code : Failure
192 static int picodlp_i2c_init(struct i2c_client *client)
195 static const struct picodlp_i2c_command init_cmd_set1[] = {
197 {DMD_PARK_TRIGGER, 1},
201 {DMD_BLOCK_COUNT, 7},
202 {DMD_VCC_CONTROL, 0x109},
203 {DMD_PARK_PULSE_COUNT, 0xA},
204 {DMD_PARK_PULSE_WIDTH, 0xB},
205 {DMD_PARK_DELAY, 0x2ED},
206 {DMD_SHADOW_ENABLE, 0},
208 {FLASH_DUMMY_BYTES, 1},
209 {FLASH_ADDR_BYTES, 3},
211 {FLASH_START_ADDR, CMT_LUT_0_START_ADDR},
212 {FLASH_READ_BYTES, CMT_LUT_0_SIZE},
213 {CMT_SPLASH_LUT_START_ADDR, 0},
214 {CMT_SPLASH_LUT_DEST_SELECT, CMT_LUT_ALL},
218 static const struct picodlp_i2c_command init_cmd_set2[] = {
220 {CMT_SPLASH_LUT_DEST_SELECT, 0},
222 {FLASH_START_ADDR, SEQUENCE_0_START_ADDR},
223 {FLASH_READ_BYTES, SEQUENCE_0_SIZE},
224 {SEQ_RESET_LUT_START_ADDR, 0},
225 {SEQ_RESET_LUT_DEST_SELECT, SEQ_SEQ_LUT},
229 static const struct picodlp_i2c_command init_cmd_set3[] = {
231 {SEQ_RESET_LUT_DEST_SELECT, 0},
233 {FLASH_START_ADDR, DRC_TABLE_0_START_ADDR},
234 {FLASH_READ_BYTES, DRC_TABLE_0_SIZE},
235 {SEQ_RESET_LUT_START_ADDR, 0},
236 {SEQ_RESET_LUT_DEST_SELECT, SEQ_DRC_LUT_ALL},
240 static const struct picodlp_i2c_command init_cmd_set4[] = {
242 {SEQ_RESET_LUT_DEST_SELECT, 0},
260 {CURTAIN_CONTROL, 0},
261 {DMD_PARK_TRIGGER, 0},
262 {R_DRIVE_CURRENT, 0x298},
263 {G_DRIVE_CURRENT, 0x298},
264 {B_DRIVE_CURRENT, 0x298},
265 {RGB_DRIVER_ENABLE, 7},
267 {ACTGEN_CONTROL, 0x10},
268 {SEQUENCE_MODE, SEQ_LOCK},
269 {DATA_FORMAT, RGB888},
270 {INPUT_RESOLUTION, WVGA_864_LANDSCAPE},
271 {INPUT_SOURCE, PARALLEL_RGB},
272 {CPU_IF_SYNC_METHOD, 1},
276 r = picodlp_i2c_write_array(client, init_cmd_set1,
277 ARRAY_SIZE(init_cmd_set1));
281 r = picodlp_wait_for_dma_done(client);
285 r = picodlp_i2c_write_array(client, init_cmd_set2,
286 ARRAY_SIZE(init_cmd_set2));
290 r = picodlp_wait_for_dma_done(client);
294 r = picodlp_i2c_write_array(client, init_cmd_set3,
295 ARRAY_SIZE(init_cmd_set3));
299 r = picodlp_wait_for_dma_done(client);
303 r = picodlp_i2c_write_array(client, init_cmd_set4,
304 ARRAY_SIZE(init_cmd_set4));
311 static int picodlp_i2c_probe(struct i2c_client *client,
312 const struct i2c_device_id *id)
314 struct picodlp_i2c_data *picodlp_i2c_data;
316 picodlp_i2c_data = kzalloc(sizeof(struct picodlp_i2c_data), GFP_KERNEL);
318 if (!picodlp_i2c_data)
321 mutex_init(&picodlp_i2c_data->xfer_lock);
322 i2c_set_clientdata(client, picodlp_i2c_data);
327 static int picodlp_i2c_remove(struct i2c_client *client)
329 struct picodlp_i2c_data *picodlp_i2c_data =
330 i2c_get_clientdata(client);
331 kfree(picodlp_i2c_data);
335 static struct i2c_driver picodlp_i2c_driver = {
337 .name = "picodlp_i2c_driver",
339 .probe = picodlp_i2c_probe,
340 .remove = picodlp_i2c_remove,
341 .id_table = picodlp_i2c_id,
344 static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
347 struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
348 struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
350 if (dssdev->platform_enable) {
351 r = dssdev->platform_enable(dssdev);
356 gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
358 gpio_set_value(picodlp_pdata->pwrgood_gpio, 1);
360 while (!gpio_get_value(picodlp_pdata->emu_done_gpio)) {
362 dev_err(&dssdev->dev, "emu_done signal not"
369 * As per dpp2600 programming guide,
370 * it is required to sleep for 1000ms after emu_done signal goes high
371 * then only i2c commands can be successfully sent to dpp2600
374 r = omapdss_dpi_display_enable(dssdev);
376 dev_err(&dssdev->dev, "failed to enable DPI\n");
380 r = picodlp_i2c_init(picod->picodlp_i2c_client);
384 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
388 omapdss_dpi_display_disable(dssdev);
390 if (dssdev->platform_disable)
391 dssdev->platform_disable(dssdev);
396 static void picodlp_panel_power_off(struct omap_dss_device *dssdev)
398 struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
400 omapdss_dpi_display_disable(dssdev);
402 gpio_set_value(picodlp_pdata->emu_done_gpio, 0);
403 gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
405 if (dssdev->platform_disable)
406 dssdev->platform_disable(dssdev);
409 static int picodlp_panel_probe(struct omap_dss_device *dssdev)
411 struct picodlp_data *picod;
412 struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
413 struct i2c_adapter *adapter;
414 struct i2c_client *picodlp_i2c_client;
415 int r = 0, picodlp_adapter_id;
417 dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_ONOFF |
418 OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IVS;
419 dssdev->panel.acb = 0x0;
420 dssdev->panel.timings = pico_ls_timings;
422 picod = kzalloc(sizeof(struct picodlp_data), GFP_KERNEL);
426 mutex_init(&picod->lock);
428 picodlp_adapter_id = picodlp_pdata->picodlp_adapter_id;
430 adapter = i2c_get_adapter(picodlp_adapter_id);
432 dev_err(&dssdev->dev, "can't get i2c adapter\n");
437 picodlp_i2c_client = i2c_new_device(adapter, &picodlp_i2c_board_info);
438 if (!picodlp_i2c_client) {
439 dev_err(&dssdev->dev, "can't add i2c device::"
440 " picodlp_i2c_client is NULL\n");
445 picod->picodlp_i2c_client = picodlp_i2c_client;
447 dev_set_drvdata(&dssdev->dev, picod);
454 static void picodlp_panel_remove(struct omap_dss_device *dssdev)
456 struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
458 i2c_unregister_device(picod->picodlp_i2c_client);
459 dev_set_drvdata(&dssdev->dev, NULL);
460 dev_dbg(&dssdev->dev, "removing picodlp panel\n");
465 static int picodlp_panel_enable(struct omap_dss_device *dssdev)
467 struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
470 dev_dbg(&dssdev->dev, "enabling picodlp panel\n");
472 mutex_lock(&picod->lock);
473 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
474 mutex_unlock(&picod->lock);
478 r = picodlp_panel_power_on(dssdev);
479 mutex_unlock(&picod->lock);
484 static void picodlp_panel_disable(struct omap_dss_device *dssdev)
486 struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
488 mutex_lock(&picod->lock);
489 /* Turn off DLP Power */
490 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
491 picodlp_panel_power_off(dssdev);
493 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
494 mutex_unlock(&picod->lock);
496 dev_dbg(&dssdev->dev, "disabling picodlp panel\n");
499 static int picodlp_panel_suspend(struct omap_dss_device *dssdev)
501 struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
503 mutex_lock(&picod->lock);
504 /* Turn off DLP Power */
505 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
506 mutex_unlock(&picod->lock);
507 dev_err(&dssdev->dev, "unable to suspend picodlp panel,"
508 " panel is not ACTIVE\n");
512 picodlp_panel_power_off(dssdev);
514 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
515 mutex_unlock(&picod->lock);
517 dev_dbg(&dssdev->dev, "suspending picodlp panel\n");
521 static int picodlp_panel_resume(struct omap_dss_device *dssdev)
523 struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
526 mutex_lock(&picod->lock);
527 if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
528 mutex_unlock(&picod->lock);
529 dev_err(&dssdev->dev, "unable to resume picodlp panel,"
530 " panel is not ACTIVE\n");
534 r = picodlp_panel_power_on(dssdev);
535 mutex_unlock(&picod->lock);
536 dev_dbg(&dssdev->dev, "resuming picodlp panel\n");
540 static void picodlp_get_resolution(struct omap_dss_device *dssdev,
541 u16 *xres, u16 *yres)
543 *xres = dssdev->panel.timings.x_res;
544 *yres = dssdev->panel.timings.y_res;
547 static struct omap_dss_driver picodlp_driver = {
548 .probe = picodlp_panel_probe,
549 .remove = picodlp_panel_remove,
551 .enable = picodlp_panel_enable,
552 .disable = picodlp_panel_disable,
554 .get_resolution = picodlp_get_resolution,
556 .suspend = picodlp_panel_suspend,
557 .resume = picodlp_panel_resume,
560 .name = "picodlp_panel",
561 .owner = THIS_MODULE,
565 static int __init picodlp_init(void)
569 r = i2c_add_driver(&picodlp_i2c_driver);
571 printk(KERN_WARNING "picodlp_i2c_driver" \
572 " registration failed\n");
576 r = omap_dss_register_driver(&picodlp_driver);
578 i2c_del_driver(&picodlp_i2c_driver);
583 static void __exit picodlp_exit(void)
585 i2c_del_driver(&picodlp_i2c_driver);
586 omap_dss_unregister_driver(&picodlp_driver);
589 module_init(picodlp_init);
590 module_exit(picodlp_exit);
592 MODULE_AUTHOR("Mythri P K <mythripk@ti.com>");
593 MODULE_DESCRIPTION("picodlp driver");
594 MODULE_LICENSE("GPL");