83910ad3f5
omap_dss_device instances have two ops structures, omap_dss_driver and omap_dss_device_ops. The former is used for devices at the end of the pipeline (a.k.a. display devices), and the latter for intermediate devices. Having two sets of operations isn't convenient as code that iterates over omap_dss_device instances need to take them both into account. There's currently a reasonably small amount of such code, but more will be introduced to move the driver away from recursive operations. To simplify current and future code, move all operations that are not specific to the display device to the omap_dss_device_ops. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
320 lines
7.7 KiB
C
320 lines
7.7 KiB
C
/*
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* NEC NL8048HL11 Panel driver
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*
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* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Erik Gilling <konkers@android.com>
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* Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include "../dss/omapdss.h"
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struct panel_drv_data {
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struct omap_dss_device dssdev;
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struct videomode vm;
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struct gpio_desc *res_gpio;
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struct spi_device *spi;
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};
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#define LCD_XRES 800
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#define LCD_YRES 480
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/*
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* NEC PIX Clock Ratings
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* MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
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*/
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#define LCD_PIXEL_CLOCK 23800000
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static const struct {
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unsigned char addr;
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unsigned char dat;
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} nec_8048_init_seq[] = {
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{ 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
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{ 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
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{ 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
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{ 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
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{ 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
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{ 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
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{ 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
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{ 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
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{ 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
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{ 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
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{ 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
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{ 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
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{ 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
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{ 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
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{ 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
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{ 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
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{ 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
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{ 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
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};
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static const struct videomode nec_8048_panel_vm = {
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.hactive = LCD_XRES,
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.vactive = LCD_YRES,
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.pixelclock = LCD_PIXEL_CLOCK,
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.hfront_porch = 6,
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.hsync_len = 1,
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.hback_porch = 4,
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.vfront_porch = 3,
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.vsync_len = 1,
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.vback_porch = 4,
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.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
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DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_POSEDGE |
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DISPLAY_FLAGS_PIXDATA_POSEDGE,
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};
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#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
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static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
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unsigned char reg_data)
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{
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int ret = 0;
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unsigned int cmd = 0, data = 0;
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cmd = 0x0000 | reg_addr; /* register address write */
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data = 0x0100 | reg_data; /* register data write */
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data = (cmd << 16) | data;
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ret = spi_write(spi, (unsigned char *)&data, 4);
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if (ret)
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pr_err("error in spi_write %x\n", data);
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return ret;
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}
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static int init_nec_8048_wvga_lcd(struct spi_device *spi)
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{
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unsigned int i;
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/* Initialization Sequence */
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/* nec_8048_spi_send(spi, REG, VAL) */
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for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
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nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
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nec_8048_init_seq[i].dat);
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udelay(20);
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nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
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nec_8048_init_seq[i].dat);
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return 0;
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}
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static int nec_8048_connect(struct omap_dss_device *src,
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struct omap_dss_device *dst)
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{
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return 0;
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}
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static void nec_8048_disconnect(struct omap_dss_device *src,
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struct omap_dss_device *dst)
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{
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}
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static int nec_8048_enable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *src = dssdev->src;
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int r;
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if (!omapdss_device_is_connected(dssdev))
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return -ENODEV;
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if (omapdss_device_is_enabled(dssdev))
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return 0;
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src->ops->set_timings(src, &ddata->vm);
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r = src->ops->enable(src);
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if (r)
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return r;
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gpiod_set_value_cansleep(ddata->res_gpio, 1);
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return 0;
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}
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static void nec_8048_disable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *src = dssdev->src;
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if (!omapdss_device_is_enabled(dssdev))
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return;
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gpiod_set_value_cansleep(ddata->res_gpio, 0);
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src->ops->disable(src);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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}
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static void nec_8048_set_timings(struct omap_dss_device *dssdev,
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struct videomode *vm)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *src = dssdev->src;
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ddata->vm = *vm;
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src->ops->set_timings(src, vm);
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}
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static void nec_8048_get_timings(struct omap_dss_device *dssdev,
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struct videomode *vm)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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*vm = ddata->vm;
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}
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static int nec_8048_check_timings(struct omap_dss_device *dssdev,
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struct videomode *vm)
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{
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struct omap_dss_device *src = dssdev->src;
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return src->ops->check_timings(src, vm);
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}
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static const struct omap_dss_device_ops nec_8048_ops = {
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.connect = nec_8048_connect,
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.disconnect = nec_8048_disconnect,
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.enable = nec_8048_enable,
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.disable = nec_8048_disable,
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.set_timings = nec_8048_set_timings,
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.get_timings = nec_8048_get_timings,
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.check_timings = nec_8048_check_timings,
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};
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static int nec_8048_probe(struct spi_device *spi)
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{
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struct panel_drv_data *ddata;
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struct omap_dss_device *dssdev;
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struct gpio_desc *gpio;
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int r;
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dev_dbg(&spi->dev, "%s\n", __func__);
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spi->mode = SPI_MODE_0;
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spi->bits_per_word = 32;
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r = spi_setup(spi);
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if (r < 0) {
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dev_err(&spi->dev, "spi_setup failed: %d\n", r);
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return r;
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}
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init_nec_8048_wvga_lcd(spi);
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ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
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if (ddata == NULL)
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return -ENOMEM;
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dev_set_drvdata(&spi->dev, ddata);
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ddata->spi = spi;
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gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(gpio)) {
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dev_err(&spi->dev, "failed to get reset gpio\n");
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return PTR_ERR(gpio);
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}
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ddata->res_gpio = gpio;
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ddata->vm = nec_8048_panel_vm;
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dssdev = &ddata->dssdev;
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dssdev->dev = &spi->dev;
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dssdev->ops = &nec_8048_ops;
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dssdev->type = OMAP_DISPLAY_TYPE_DPI;
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dssdev->owner = THIS_MODULE;
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dssdev->of_ports = BIT(0);
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omapdss_display_init(dssdev);
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omapdss_device_register(dssdev);
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return 0;
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}
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static int nec_8048_remove(struct spi_device *spi)
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{
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struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
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struct omap_dss_device *dssdev = &ddata->dssdev;
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dev_dbg(&ddata->spi->dev, "%s\n", __func__);
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omapdss_device_unregister(dssdev);
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nec_8048_disable(dssdev);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int nec_8048_suspend(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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nec_8048_spi_send(spi, 2, 0x01);
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mdelay(40);
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return 0;
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}
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static int nec_8048_resume(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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/* reinitialize the panel */
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spi_setup(spi);
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nec_8048_spi_send(spi, 2, 0x00);
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init_nec_8048_wvga_lcd(spi);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
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nec_8048_resume);
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#define NEC_8048_PM_OPS (&nec_8048_pm_ops)
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#else
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#define NEC_8048_PM_OPS NULL
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#endif
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static const struct of_device_id nec_8048_of_match[] = {
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{ .compatible = "omapdss,nec,nl8048hl11", },
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{},
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};
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MODULE_DEVICE_TABLE(of, nec_8048_of_match);
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static struct spi_driver nec_8048_driver = {
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.driver = {
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.name = "panel-nec-nl8048hl11",
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.pm = NEC_8048_PM_OPS,
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.of_match_table = nec_8048_of_match,
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.suppress_bind_attrs = true,
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},
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.probe = nec_8048_probe,
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.remove = nec_8048_remove,
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};
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module_spi_driver(nec_8048_driver);
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MODULE_ALIAS("spi:nec,nl8048hl11");
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MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
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MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
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MODULE_LICENSE("GPL");
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