| /* |
| * Support for NEC-nl8048hl11-01b panel driver |
| * |
| * Copyright (C) 2010 Texas Instruments Inc. |
| * Author: Erik Gilling <konkers@android.com> |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published by |
| * the Free Software Foundation. |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/spi/spi.h> |
| #include <linux/backlight.h> |
| #include <linux/fb.h> |
| |
| #include <video/omapdss.h> |
| |
| #define LCD_XRES 800 |
| #define LCD_YRES 480 |
| /* |
| * NEC PIX Clock Ratings |
| * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz |
| */ |
| #define LCD_PIXEL_CLOCK 23800 |
| |
| struct nec_8048_data { |
| struct backlight_device *bl; |
| }; |
| |
| static const struct { |
| unsigned char addr; |
| unsigned char dat; |
| } nec_8048_init_seq[] = { |
| { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 }, |
| { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 }, |
| { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 }, |
| { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F }, |
| { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F }, |
| { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F }, |
| { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F }, |
| { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 }, |
| { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 }, |
| { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C }, |
| { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 }, |
| { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 }, |
| { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 }, |
| { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 }, |
| { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC }, |
| { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 }, |
| { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 }, |
| { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 }, |
| }; |
| |
| /* |
| * NEC NL8048HL11-01B Manual |
| * defines HFB, HSW, HBP, VFP, VSW, VBP as shown below |
| */ |
| |
| static struct omap_video_timings nec_8048_panel_timings = { |
| /* 800 x 480 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */ |
| .x_res = LCD_XRES, |
| .y_res = LCD_YRES, |
| .pixel_clock = LCD_PIXEL_CLOCK, |
| .hfp = 6, |
| .hsw = 1, |
| .hbp = 4, |
| .vfp = 3, |
| .vsw = 1, |
| .vbp = 4, |
| }; |
| |
| static int nec_8048_bl_update_status(struct backlight_device *bl) |
| { |
| struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev); |
| int level; |
| |
| if (!dssdev->set_backlight) |
| return -EINVAL; |
| |
| if (bl->props.fb_blank == FB_BLANK_UNBLANK && |
| bl->props.power == FB_BLANK_UNBLANK) |
| level = bl->props.brightness; |
| else |
| level = 0; |
| |
| return dssdev->set_backlight(dssdev, level); |
| } |
| |
| static int nec_8048_bl_get_brightness(struct backlight_device *bl) |
| { |
| if (bl->props.fb_blank == FB_BLANK_UNBLANK && |
| bl->props.power == FB_BLANK_UNBLANK) |
| return bl->props.brightness; |
| |
| return 0; |
| } |
| |
| static const struct backlight_ops nec_8048_bl_ops = { |
| .get_brightness = nec_8048_bl_get_brightness, |
| .update_status = nec_8048_bl_update_status, |
| }; |
| |
| static int nec_8048_panel_probe(struct omap_dss_device *dssdev) |
| { |
| struct backlight_device *bl; |
| struct nec_8048_data *necd; |
| struct backlight_properties props; |
| int r; |
| |
| dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | |
| OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_RF | |
| OMAP_DSS_LCD_ONOFF; |
| dssdev->panel.timings = nec_8048_panel_timings; |
| |
| necd = kzalloc(sizeof(*necd), GFP_KERNEL); |
| if (!necd) |
| return -ENOMEM; |
| |
| dev_set_drvdata(&dssdev->dev, necd); |
| |
| memset(&props, 0, sizeof(struct backlight_properties)); |
| props.max_brightness = 255; |
| |
| bl = backlight_device_register("nec-8048", &dssdev->dev, dssdev, |
| &nec_8048_bl_ops, &props); |
| if (IS_ERR(bl)) { |
| r = PTR_ERR(bl); |
| kfree(necd); |
| return r; |
| } |
| necd->bl = bl; |
| |
| bl->props.fb_blank = FB_BLANK_UNBLANK; |
| bl->props.power = FB_BLANK_UNBLANK; |
| bl->props.max_brightness = dssdev->max_backlight_level; |
| bl->props.brightness = dssdev->max_backlight_level; |
| |
| r = nec_8048_bl_update_status(bl); |
| if (r < 0) |
| dev_err(&dssdev->dev, "failed to set lcd brightness\n"); |
| |
| return 0; |
| } |
| |
| static void nec_8048_panel_remove(struct omap_dss_device *dssdev) |
| { |
| struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev); |
| struct backlight_device *bl = necd->bl; |
| |
| bl->props.power = FB_BLANK_POWERDOWN; |
| nec_8048_bl_update_status(bl); |
| backlight_device_unregister(bl); |
| |
| kfree(necd); |
| } |
| |
| static int nec_8048_panel_power_on(struct omap_dss_device *dssdev) |
| { |
| int r; |
| struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev); |
| struct backlight_device *bl = necd->bl; |
| |
| if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) |
| return 0; |
| |
| r = omapdss_dpi_display_enable(dssdev); |
| if (r) |
| goto err0; |
| |
| if (dssdev->platform_enable) { |
| r = dssdev->platform_enable(dssdev); |
| if (r) |
| goto err1; |
| } |
| |
| r = nec_8048_bl_update_status(bl); |
| if (r < 0) |
| dev_err(&dssdev->dev, "failed to set lcd brightness\n"); |
| |
| return 0; |
| err1: |
| omapdss_dpi_display_disable(dssdev); |
| err0: |
| return r; |
| } |
| |
| static void nec_8048_panel_power_off(struct omap_dss_device *dssdev) |
| { |
| struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev); |
| struct backlight_device *bl = necd->bl; |
| |
| if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) |
| return; |
| |
| bl->props.brightness = 0; |
| nec_8048_bl_update_status(bl); |
| |
| if (dssdev->platform_disable) |
| dssdev->platform_disable(dssdev); |
| |
| omapdss_dpi_display_disable(dssdev); |
| } |
| |
| static int nec_8048_panel_enable(struct omap_dss_device *dssdev) |
| { |
| int r; |
| |
| r = nec_8048_panel_power_on(dssdev); |
| if (r) |
| return r; |
| |
| dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| |
| return 0; |
| } |
| |
| static void nec_8048_panel_disable(struct omap_dss_device *dssdev) |
| { |
| nec_8048_panel_power_off(dssdev); |
| |
| dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| } |
| |
| static int nec_8048_panel_suspend(struct omap_dss_device *dssdev) |
| { |
| nec_8048_panel_power_off(dssdev); |
| |
| dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; |
| |
| return 0; |
| } |
| |
| static int nec_8048_panel_resume(struct omap_dss_device *dssdev) |
| { |
| int r; |
| |
| r = nec_8048_panel_power_on(dssdev); |
| if (r) |
| return r; |
| |
| dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| |
| return 0; |
| } |
| |
| static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev) |
| { |
| return 16; |
| } |
| |
| static struct omap_dss_driver nec_8048_driver = { |
| .probe = nec_8048_panel_probe, |
| .remove = nec_8048_panel_remove, |
| .enable = nec_8048_panel_enable, |
| .disable = nec_8048_panel_disable, |
| .suspend = nec_8048_panel_suspend, |
| .resume = nec_8048_panel_resume, |
| .get_recommended_bpp = nec_8048_recommended_bpp, |
| |
| .driver = { |
| .name = "NEC_8048_panel", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr, |
| unsigned char reg_data) |
| { |
| int ret = 0; |
| unsigned int cmd = 0, data = 0; |
| |
| cmd = 0x0000 | reg_addr; /* register address write */ |
| data = 0x0100 | reg_data ; /* register data write */ |
| data = (cmd << 16) | data; |
| |
| ret = spi_write(spi, (unsigned char *)&data, 4); |
| if (ret) |
| pr_err("error in spi_write %x\n", data); |
| |
| return ret; |
| } |
| |
| static int init_nec_8048_wvga_lcd(struct spi_device *spi) |
| { |
| unsigned int i; |
| /* Initialization Sequence */ |
| /* nec_8048_spi_send(spi, REG, VAL) */ |
| for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++) |
| nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, |
| nec_8048_init_seq[i].dat); |
| udelay(20); |
| nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, |
| nec_8048_init_seq[i].dat); |
| return 0; |
| } |
| |
| static int nec_8048_spi_probe(struct spi_device *spi) |
| { |
| spi->mode = SPI_MODE_0; |
| spi->bits_per_word = 32; |
| spi_setup(spi); |
| |
| init_nec_8048_wvga_lcd(spi); |
| |
| return omap_dss_register_driver(&nec_8048_driver); |
| } |
| |
| static int nec_8048_spi_remove(struct spi_device *spi) |
| { |
| omap_dss_unregister_driver(&nec_8048_driver); |
| |
| return 0; |
| } |
| |
| static int nec_8048_spi_suspend(struct spi_device *spi, pm_message_t mesg) |
| { |
| nec_8048_spi_send(spi, 2, 0x01); |
| mdelay(40); |
| |
| return 0; |
| } |
| |
| static int nec_8048_spi_resume(struct spi_device *spi) |
| { |
| /* reinitialize the panel */ |
| spi_setup(spi); |
| nec_8048_spi_send(spi, 2, 0x00); |
| init_nec_8048_wvga_lcd(spi); |
| |
| return 0; |
| } |
| |
| static struct spi_driver nec_8048_spi_driver = { |
| .probe = nec_8048_spi_probe, |
| .remove = __devexit_p(nec_8048_spi_remove), |
| .suspend = nec_8048_spi_suspend, |
| .resume = nec_8048_spi_resume, |
| .driver = { |
| .name = "nec_8048_spi", |
| .bus = &spi_bus_type, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init nec_8048_lcd_init(void) |
| { |
| return spi_register_driver(&nec_8048_spi_driver); |
| } |
| |
| static void __exit nec_8048_lcd_exit(void) |
| { |
| return spi_unregister_driver(&nec_8048_spi_driver); |
| } |
| |
| module_init(nec_8048_lcd_init); |
| module_exit(nec_8048_lcd_exit); |
| MODULE_AUTHOR("Erik Gilling <konkers@android.com>"); |
| MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver"); |
| MODULE_LICENSE("GPL"); |