2 * NEC NL8048HL11 Panel driver
4 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
5 * Author: Erik Gilling <konkers@android.com>
6 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/delay.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/module.h>
17 #include <linux/spi/spi.h>
19 #include "../dss/omapdss.h"
21 struct panel_drv_data {
22 struct omap_dss_device dssdev;
26 struct gpio_desc *res_gpio;
28 struct spi_device *spi;
34 * NEC PIX Clock Ratings
35 * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
37 #define LCD_PIXEL_CLOCK 23800000
42 } nec_8048_init_seq[] = {
43 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
44 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
45 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
46 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
47 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
48 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
49 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
50 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
51 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
52 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
53 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
54 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
55 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
56 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
57 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
58 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
59 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
60 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
63 static const struct videomode nec_8048_panel_vm = {
66 .pixelclock = LCD_PIXEL_CLOCK,
74 .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
77 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
79 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
80 unsigned char reg_data)
83 unsigned int cmd = 0, data = 0;
85 cmd = 0x0000 | reg_addr; /* register address write */
86 data = 0x0100 | reg_data; /* register data write */
87 data = (cmd << 16) | data;
89 ret = spi_write(spi, (unsigned char *)&data, 4);
91 pr_err("error in spi_write %x\n", data);
96 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
99 /* Initialization Sequence */
100 /* nec_8048_spi_send(spi, REG, VAL) */
101 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
102 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
103 nec_8048_init_seq[i].dat);
105 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
106 nec_8048_init_seq[i].dat);
110 static int nec_8048_connect(struct omap_dss_device *src,
111 struct omap_dss_device *dst)
116 static void nec_8048_disconnect(struct omap_dss_device *src,
117 struct omap_dss_device *dst)
121 static void nec_8048_enable(struct omap_dss_device *dssdev)
123 struct panel_drv_data *ddata = to_panel_data(dssdev);
125 gpiod_set_value_cansleep(ddata->res_gpio, 1);
128 static void nec_8048_disable(struct omap_dss_device *dssdev)
130 struct panel_drv_data *ddata = to_panel_data(dssdev);
132 gpiod_set_value_cansleep(ddata->res_gpio, 0);
135 static int nec_8048_get_modes(struct omap_dss_device *dssdev,
136 struct drm_connector *connector)
138 struct panel_drv_data *ddata = to_panel_data(dssdev);
140 return omapdss_display_get_modes(connector, &ddata->vm);
143 static const struct omap_dss_device_ops nec_8048_ops = {
144 .connect = nec_8048_connect,
145 .disconnect = nec_8048_disconnect,
147 .enable = nec_8048_enable,
148 .disable = nec_8048_disable,
150 .get_modes = nec_8048_get_modes,
153 static int nec_8048_probe(struct spi_device *spi)
155 struct panel_drv_data *ddata;
156 struct omap_dss_device *dssdev;
157 struct gpio_desc *gpio;
160 dev_dbg(&spi->dev, "%s\n", __func__);
162 spi->mode = SPI_MODE_0;
163 spi->bits_per_word = 32;
167 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
171 init_nec_8048_wvga_lcd(spi);
173 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
177 dev_set_drvdata(&spi->dev, ddata);
181 gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
183 dev_err(&spi->dev, "failed to get reset gpio\n");
184 return PTR_ERR(gpio);
187 ddata->res_gpio = gpio;
189 ddata->vm = nec_8048_panel_vm;
191 dssdev = &ddata->dssdev;
192 dssdev->dev = &spi->dev;
193 dssdev->ops = &nec_8048_ops;
194 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
195 dssdev->display = true;
196 dssdev->owner = THIS_MODULE;
197 dssdev->of_ports = BIT(0);
198 dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
199 dssdev->bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_SYNC_POSEDGE
200 | DRM_BUS_FLAG_PIXDATA_POSEDGE;
202 omapdss_display_init(dssdev);
203 omapdss_device_register(dssdev);
208 static int nec_8048_remove(struct spi_device *spi)
210 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
211 struct omap_dss_device *dssdev = &ddata->dssdev;
213 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
215 omapdss_device_unregister(dssdev);
217 nec_8048_disable(dssdev);
222 #ifdef CONFIG_PM_SLEEP
223 static int nec_8048_suspend(struct device *dev)
225 struct spi_device *spi = to_spi_device(dev);
227 nec_8048_spi_send(spi, 2, 0x01);
233 static int nec_8048_resume(struct device *dev)
235 struct spi_device *spi = to_spi_device(dev);
237 /* reinitialize the panel */
239 nec_8048_spi_send(spi, 2, 0x00);
240 init_nec_8048_wvga_lcd(spi);
244 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
246 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
248 #define NEC_8048_PM_OPS NULL
251 static const struct of_device_id nec_8048_of_match[] = {
252 { .compatible = "omapdss,nec,nl8048hl11", },
256 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
258 static struct spi_driver nec_8048_driver = {
260 .name = "panel-nec-nl8048hl11",
261 .pm = NEC_8048_PM_OPS,
262 .of_match_table = nec_8048_of_match,
263 .suppress_bind_attrs = true,
265 .probe = nec_8048_probe,
266 .remove = nec_8048_remove,
269 module_spi_driver(nec_8048_driver);
271 MODULE_ALIAS("spi:nec,nl8048hl11");
272 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
273 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
274 MODULE_LICENSE("GPL");