Add panel driver for TI Boxer LCD. This panel is used on many embedded devices such as Barnes & Nobles's Nook Color e-reader.
Signed-off-by: Javier Martinez Canillas <[email protected]> --- drivers/video/omap2/displays/Kconfig | 6 + drivers/video/omap2/displays/Makefile | 1 + drivers/video/omap2/displays/panel-boxer.c | 333 ++++++++++++++++++++++++++++ 3 files changed, 340 insertions(+), 0 deletions(-) create mode 100644 drivers/video/omap2/displays/panel-boxer.c diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig index 609a280..6c9fe26 100644 --- a/drivers/video/omap2/displays/Kconfig +++ b/drivers/video/omap2/displays/Kconfig @@ -48,4 +48,10 @@ config PANEL_ACX565AKM select BACKLIGHT_CLASS_DEVICE help This is the LCD panel used on Nokia N900 + +config PANEL_BOXER + tristate "TI Boxer Panel" + help + LCD Panel used in the TI Boxer + endmenu diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile index 0f601ab3a..26c662e 100644 --- a/drivers/video/omap2/displays/Makefile +++ b/drivers/video/omap2/displays/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_PANEL_NEC_NL8048HL11_01B) += panel-nec-nl8048hl11-01b.o obj-$(CONFIG_PANEL_TAAL) += panel-taal.o obj-$(CONFIG_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o obj-$(CONFIG_PANEL_ACX565AKM) += panel-acx565akm.o +obj-$(CONFIG_PANEL_BOXER) += panel-boxer.o diff --git a/drivers/video/omap2/displays/panel-boxer.c b/drivers/video/omap2/displays/panel-boxer.c new file mode 100644 index 0000000..6429960 --- /dev/null +++ b/drivers/video/omap2/displays/panel-boxer.c @@ -0,0 +1,333 @@ +/* + * Boxer panel support + * + * Copyright (C) 2008 Nokia Corporation + * Author: Tomi Valkeinen <[email protected]> + * + * Copyright (c) 2010 Barnes & Noble + * David Bolcsfoldi <[email protected]> + * + * 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/kernel.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/workqueue.h> + +#include <plat/mcspi.h> +#include <mach/gpio.h> +#include <mach/gpio.h> +#include <plat/mux.h> +#include <asm/mach-types.h> + +#include <video/omapdss.h> + +/* Delay between Panel configuration and Panel enabling */ +#define LCD_RST_DELAY 100 +#define LCD_INIT_DELAY 200 + +#define LCD_XRES 1024 +#define LCD_YRES 600 + +#define LCD_PIXCLOCK_MIN 39000 /* CPT MIN PIX Clock is 39MHz */ +#define Lcd_Pixclock_Typ 45000 /* Typical PIX clock is 45MHz */ +#define LCD_PIXCLOCK_MAX 52000 /* Maximum is 52MHz */ + +/* Current Pixel clock */ +#define LCD_PIXEL_CLOCK 68000 + +static struct workqueue_struct *boxer_panel_wq; +static struct omap_dss_device *boxer_panel_dssdev; +static struct regulator *boxer_panel_regulator; +static struct spi_device *boxer_spi_device; +static atomic_t boxer_panel_is_enabled = ATOMIC_INIT(0); + +/*NEC NL8048HL11-01B Manual + * defines HFB, HSW, HBP, VFP, VSW, VBP as shown below + */ + +static struct omap_video_timings boxer_panel_timings = { + /* 1024 x 600 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */ + .x_res = LCD_XRES, + .y_res = LCD_YRES, + .pixel_clock = LCD_PIXEL_CLOCK, + .hfp = 48, + .hsw = 40, + .hbp = 65, + .vfp = 3, + .vsw = 10, + .vbp = 25, +}; + +static void boxer_get_resolution(struct omap_dss_device *dssdev, + u16 *xres, u16 *yres) +{ + + *xres = dssdev->panel.timings.x_res; + *yres = dssdev->panel.timings.y_res; +} + +int boxer_get_recommended_bpp(struct omap_dss_device *dssdev) +{ + return 24; +} + + +static int boxer_panel_probe(struct omap_dss_device *dssdev) +{ + dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | + OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IPC; + dssdev->panel.timings = boxer_panel_timings; + return 0; +} + +static void boxer_panel_remove(struct omap_dss_device *dssdev) +{ +} + +static int spi_send(struct spi_device *spi, unsigned char reg_addr, + unsigned char reg_data) +{ + int ret = 0; + uint16_t msg; + msg = (reg_addr << 10) | reg_data; + + if (spi_write(spi, (unsigned char *)&msg, 2)) + printk(KERN_ERR "error in spi_write %x\n", msg); + + udelay(10); + + return ret; +} + +static void boxer_init_panel(void) +{ + spi_send(boxer_spi_device, 0, 0x00); + + spi_send(boxer_spi_device, 0, 0xad); + spi_send(boxer_spi_device, 1, 0x30); + spi_send(boxer_spi_device, 2, 0x40); + spi_send(boxer_spi_device, 0xe, 0x5f); + spi_send(boxer_spi_device, 0xf, 0xa4); + spi_send(boxer_spi_device, 0xd, 0x00); + spi_send(boxer_spi_device, 0x2, 0x43); + spi_send(boxer_spi_device, 0xa, 0x28); + spi_send(boxer_spi_device, 0x10, 0x41); +} + +static void boxer_panel_work_func(struct work_struct *work) +{ + if (!regulator_is_enabled(boxer_panel_regulator)) + regulator_enable(boxer_panel_regulator); + + msleep(LCD_RST_DELAY); + + boxer_spi_device->mode = SPI_MODE_0; + boxer_spi_device->bits_per_word = 16; + spi_setup(boxer_spi_device); + + boxer_init_panel(); + + msleep(LCD_INIT_DELAY); + + if (boxer_panel_dssdev->platform_enable) + boxer_panel_dssdev->platform_enable(boxer_panel_dssdev); +} + +static DECLARE_WORK(boxer_panel_work, boxer_panel_work_func); + +static int boxer_panel_enable(struct omap_dss_device *dssdev) +{ + if (atomic_add_unless(&boxer_panel_is_enabled, 1, 1)) { + boxer_panel_dssdev = dssdev; + queue_work(boxer_panel_wq, &boxer_panel_work); + } + + return 0; +} + +static void boxer_panel_disable(struct omap_dss_device *dssdev) +{ + if (atomic_dec_and_test(&boxer_panel_is_enabled)) { + cancel_work_sync(&boxer_panel_work); + + if (dssdev->platform_disable) + dssdev->platform_disable(dssdev); + + if (regulator_is_enabled(boxer_panel_regulator)) + regulator_disable(boxer_panel_regulator); + } else { + printk(KERN_WARNING "%s: attempting to disable panel twice!\n", + __func__); + WARN_ON(1); + } +} + +static int boxer_panel_suspend(struct omap_dss_device *dssdev) +{ + boxer_panel_disable(dssdev); + return 0; +} + +static int boxer_panel_resume(struct omap_dss_device *dssdev) +{ + return boxer_panel_enable(dssdev); +} + +static struct omap_dss_driver boxer_driver = { + .probe = boxer_panel_probe, + .remove = boxer_panel_remove, + + .enable = boxer_panel_enable, + .disable = boxer_panel_disable, + .suspend = boxer_panel_suspend, + .resume = boxer_panel_resume, + .get_resolution = boxer_get_resolution, + .get_recommended_bpp = boxer_get_recommended_bpp, + .driver = { + .name = "boxer_panel", + .owner = THIS_MODULE, + }, +}; + +static ssize_t lcd_reg_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int argc; + char **args; + unsigned long r, val; + int ret; + + struct spi_device *spi = to_spi_device(dev); + + args = argv_split(GFP_KERNEL, buf, &argc); + + if (args == NULL) { + dev_err(dev, "error getting arguments\n"); + return count; + } + + if (argc == 2) { + ret = strict_strtoul(*args, 0, (unsigned long *)&r); + if (ret) + return ret; + args++; + ret = strict_strtoul(*args, 0, (unsigned long *)&val); + if (ret) + return ret; + dev_info(dev, "set lcd panel spi reg %lu = %lu\n", r, val); + spi_send(spi, r, val); + } + argv_free(args); + + return count; +} + + +static DEVICE_ATTR(lcd_reg, S_IWUSR, NULL, lcd_reg_store); + +static struct attribute *boxer_lcd_spi_attributes[] = { + &dev_attr_lcd_reg, + NULL +}; + + +static struct attribute_group boxer_lcd_spi_attributes_group = { + .attrs = boxer_lcd_spi_attributes, +}; + + + +static int boxer_spi_probe(struct spi_device *spi) +{ + spi->mode = SPI_MODE_0; + spi->bits_per_word = 16; + spi_setup(spi); + + boxer_spi_device = spi; + + boxer_init_panel(); + + if (sysfs_create_group(&spi->dev.kobj, &boxer_lcd_spi_attributes_group)) + printk(KERN_WARNING "error creating sysfs entries\n"); + + omap_dss_register_driver(&boxer_driver); + return 0; +} + +static int boxer_spi_remove(struct spi_device *spi) +{ + sysfs_remove_group(&spi->dev.kobj, &boxer_lcd_spi_attributes_group); + omap_dss_unregister_driver(&boxer_driver); + + return 0; +} + + +static struct spi_driver boxer_spi_driver = { + .probe = boxer_spi_probe, + .remove = __devexit_p(boxer_spi_remove), + .driver = { + .name = "boxer_disp_spi", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, +}; + +static int __init boxer_lcd_init(void) +{ + int ret = 0; + + boxer_panel_wq = create_singlethread_workqueue("boxer-panel-wq"); + + printk(KERN_WARNING "Enabling power for LCD\n"); + boxer_panel_regulator = regulator_get(NULL, "vlcd"); + + if (IS_ERR(boxer_panel_regulator)) { + printk(KERN_ERR "Unable to get vlcd regulator, reason: %ld!\n", + IS_ERR(boxer_panel_regulator)); + ret = -ENODEV; + goto out; + } + + ret = regulator_enable(boxer_panel_regulator); + + if (ret) { + printk(KERN_ERR "Failed to enable regulator vlcd!\n"); + regulator_put(boxer_panel_regulator); + goto out; + } + + return spi_register_driver(&boxer_spi_driver); +out: + return ret; +} + +static void __exit boxer_lcd_exit(void) +{ + spi_unregister_driver(&boxer_spi_driver); + regulator_disable(boxer_panel_regulator); + regulator_put(boxer_panel_regulator); + destroy_workqueue(boxer_panel_wq); +} + + +module_init(boxer_lcd_init); +module_exit(boxer_lcd_exit); +MODULE_LICENSE("GPL"); + -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
