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- /*
- * Toppoly TD028TTEC1 panel support
- *
- * Copyright (C) 2008 Nokia Corporation
- * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
- *
- * Neo 1973 code (jbt6k74.c):
- * Copyright (C) 2006-2007 by OpenMoko, Inc.
- * Author: Harald Welte <laforge@openmoko.org>
- *
- * Ported and adapted from Neo 1973 U-Boot by:
- * H. Nikolaus Schaller <hns@goldelico.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/gpio.h>
- #include "../dss/omapdss.h"
- struct panel_drv_data {
- struct omap_dss_device dssdev;
- struct omap_dss_device *in;
- int data_lines;
- struct videomode vm;
- struct spi_device *spi_dev;
- };
- static struct videomode td028ttec1_panel_vm = {
- .hactive = 480,
- .vactive = 640,
- .pixelclock = 22153000,
- .hfront_porch = 24,
- .hsync_len = 8,
- .hback_porch = 8,
- .vfront_porch = 4,
- .vsync_len = 2,
- .vback_porch = 2,
- .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
- DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_POSEDGE |
- DISPLAY_FLAGS_PIXDATA_NEGEDGE,
- /*
- * Note: According to the panel documentation:
- * SYNC needs to be driven on the FALLING edge
- */
- };
- #define JBT_COMMAND 0x000
- #define JBT_DATA 0x100
- static int jbt_ret_write_0(struct panel_drv_data *ddata, u8 reg)
- {
- int rc;
- u16 tx_buf = JBT_COMMAND | reg;
- rc = spi_write(ddata->spi_dev, (u8 *)&tx_buf,
- 1*sizeof(u16));
- if (rc != 0)
- dev_err(&ddata->spi_dev->dev,
- "jbt_ret_write_0 spi_write ret %d\n", rc);
- return rc;
- }
- static int jbt_reg_write_1(struct panel_drv_data *ddata, u8 reg, u8 data)
- {
- int rc;
- u16 tx_buf[2];
- tx_buf[0] = JBT_COMMAND | reg;
- tx_buf[1] = JBT_DATA | data;
- rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
- 2*sizeof(u16));
- if (rc != 0)
- dev_err(&ddata->spi_dev->dev,
- "jbt_reg_write_1 spi_write ret %d\n", rc);
- return rc;
- }
- static int jbt_reg_write_2(struct panel_drv_data *ddata, u8 reg, u16 data)
- {
- int rc;
- u16 tx_buf[3];
- tx_buf[0] = JBT_COMMAND | reg;
- tx_buf[1] = JBT_DATA | (data >> 8);
- tx_buf[2] = JBT_DATA | (data & 0xff);
- rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
- 3*sizeof(u16));
- if (rc != 0)
- dev_err(&ddata->spi_dev->dev,
- "jbt_reg_write_2 spi_write ret %d\n", rc);
- return rc;
- }
- enum jbt_register {
- JBT_REG_SLEEP_IN = 0x10,
- JBT_REG_SLEEP_OUT = 0x11,
- JBT_REG_DISPLAY_OFF = 0x28,
- JBT_REG_DISPLAY_ON = 0x29,
- JBT_REG_RGB_FORMAT = 0x3a,
- JBT_REG_QUAD_RATE = 0x3b,
- JBT_REG_POWER_ON_OFF = 0xb0,
- JBT_REG_BOOSTER_OP = 0xb1,
- JBT_REG_BOOSTER_MODE = 0xb2,
- JBT_REG_BOOSTER_FREQ = 0xb3,
- JBT_REG_OPAMP_SYSCLK = 0xb4,
- JBT_REG_VSC_VOLTAGE = 0xb5,
- JBT_REG_VCOM_VOLTAGE = 0xb6,
- JBT_REG_EXT_DISPL = 0xb7,
- JBT_REG_OUTPUT_CONTROL = 0xb8,
- JBT_REG_DCCLK_DCEV = 0xb9,
- JBT_REG_DISPLAY_MODE1 = 0xba,
- JBT_REG_DISPLAY_MODE2 = 0xbb,
- JBT_REG_DISPLAY_MODE = 0xbc,
- JBT_REG_ASW_SLEW = 0xbd,
- JBT_REG_DUMMY_DISPLAY = 0xbe,
- JBT_REG_DRIVE_SYSTEM = 0xbf,
- JBT_REG_SLEEP_OUT_FR_A = 0xc0,
- JBT_REG_SLEEP_OUT_FR_B = 0xc1,
- JBT_REG_SLEEP_OUT_FR_C = 0xc2,
- JBT_REG_SLEEP_IN_LCCNT_D = 0xc3,
- JBT_REG_SLEEP_IN_LCCNT_E = 0xc4,
- JBT_REG_SLEEP_IN_LCCNT_F = 0xc5,
- JBT_REG_SLEEP_IN_LCCNT_G = 0xc6,
- JBT_REG_GAMMA1_FINE_1 = 0xc7,
- JBT_REG_GAMMA1_FINE_2 = 0xc8,
- JBT_REG_GAMMA1_INCLINATION = 0xc9,
- JBT_REG_GAMMA1_BLUE_OFFSET = 0xca,
- JBT_REG_BLANK_CONTROL = 0xcf,
- JBT_REG_BLANK_TH_TV = 0xd0,
- JBT_REG_CKV_ON_OFF = 0xd1,
- JBT_REG_CKV_1_2 = 0xd2,
- JBT_REG_OEV_TIMING = 0xd3,
- JBT_REG_ASW_TIMING_1 = 0xd4,
- JBT_REG_ASW_TIMING_2 = 0xd5,
- JBT_REG_HCLOCK_VGA = 0xec,
- JBT_REG_HCLOCK_QVGA = 0xed,
- };
- #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
- static int td028ttec1_panel_connect(struct omap_dss_device *dssdev)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *in = ddata->in;
- int r;
- if (omapdss_device_is_connected(dssdev))
- return 0;
- r = in->ops.dpi->connect(in, dssdev);
- if (r)
- return r;
- return 0;
- }
- static void td028ttec1_panel_disconnect(struct omap_dss_device *dssdev)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *in = ddata->in;
- if (!omapdss_device_is_connected(dssdev))
- return;
- in->ops.dpi->disconnect(in, dssdev);
- }
- static int td028ttec1_panel_enable(struct omap_dss_device *dssdev)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *in = ddata->in;
- int r;
- if (!omapdss_device_is_connected(dssdev))
- return -ENODEV;
- if (omapdss_device_is_enabled(dssdev))
- return 0;
- if (ddata->data_lines)
- in->ops.dpi->set_data_lines(in, ddata->data_lines);
- in->ops.dpi->set_timings(in, &ddata->vm);
- r = in->ops.dpi->enable(in);
- if (r)
- return r;
- dev_dbg(dssdev->dev, "td028ttec1_panel_enable() - state %d\n",
- dssdev->state);
- /* three times command zero */
- r |= jbt_ret_write_0(ddata, 0x00);
- usleep_range(1000, 2000);
- r |= jbt_ret_write_0(ddata, 0x00);
- usleep_range(1000, 2000);
- r |= jbt_ret_write_0(ddata, 0x00);
- usleep_range(1000, 2000);
- if (r) {
- dev_warn(dssdev->dev, "transfer error\n");
- goto transfer_err;
- }
- /* deep standby out */
- r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x17);
- /* RGB I/F on, RAM write off, QVGA through, SIGCON enable */
- r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE, 0x80);
- /* Quad mode off */
- r |= jbt_reg_write_1(ddata, JBT_REG_QUAD_RATE, 0x00);
- /* AVDD on, XVDD on */
- r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x16);
- /* Output control */
- r |= jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0xfff9);
- /* Sleep mode off */
- r |= jbt_ret_write_0(ddata, JBT_REG_SLEEP_OUT);
- /* at this point we have like 50% grey */
- /* initialize register set */
- r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE1, 0x01);
- r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE2, 0x00);
- r |= jbt_reg_write_1(ddata, JBT_REG_RGB_FORMAT, 0x60);
- r |= jbt_reg_write_1(ddata, JBT_REG_DRIVE_SYSTEM, 0x10);
- r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_OP, 0x56);
- r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_MODE, 0x33);
- r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
- r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
- r |= jbt_reg_write_1(ddata, JBT_REG_OPAMP_SYSCLK, 0x02);
- r |= jbt_reg_write_1(ddata, JBT_REG_VSC_VOLTAGE, 0x2b);
- r |= jbt_reg_write_1(ddata, JBT_REG_VCOM_VOLTAGE, 0x40);
- r |= jbt_reg_write_1(ddata, JBT_REG_EXT_DISPL, 0x03);
- r |= jbt_reg_write_1(ddata, JBT_REG_DCCLK_DCEV, 0x04);
- /*
- * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement
- * to avoid red / blue flicker
- */
- r |= jbt_reg_write_1(ddata, JBT_REG_ASW_SLEW, 0x04);
- r |= jbt_reg_write_1(ddata, JBT_REG_DUMMY_DISPLAY, 0x00);
- r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_A, 0x11);
- r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_B, 0x11);
- r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_C, 0x11);
- r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040);
- r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0);
- r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020);
- r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0);
- r |= jbt_reg_write_2(ddata, JBT_REG_GAMMA1_FINE_1, 0x5533);
- r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_FINE_2, 0x00);
- r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_INCLINATION, 0x00);
- r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
- r |= jbt_reg_write_2(ddata, JBT_REG_HCLOCK_VGA, 0x1f0);
- r |= jbt_reg_write_1(ddata, JBT_REG_BLANK_CONTROL, 0x02);
- r |= jbt_reg_write_2(ddata, JBT_REG_BLANK_TH_TV, 0x0804);
- r |= jbt_reg_write_1(ddata, JBT_REG_CKV_ON_OFF, 0x01);
- r |= jbt_reg_write_2(ddata, JBT_REG_CKV_1_2, 0x0000);
- r |= jbt_reg_write_2(ddata, JBT_REG_OEV_TIMING, 0x0d0e);
- r |= jbt_reg_write_2(ddata, JBT_REG_ASW_TIMING_1, 0x11a4);
- r |= jbt_reg_write_1(ddata, JBT_REG_ASW_TIMING_2, 0x0e);
- r |= jbt_ret_write_0(ddata, JBT_REG_DISPLAY_ON);
- dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
- transfer_err:
- return r ? -EIO : 0;
- }
- static void td028ttec1_panel_disable(struct omap_dss_device *dssdev)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *in = ddata->in;
- if (!omapdss_device_is_enabled(dssdev))
- return;
- dev_dbg(dssdev->dev, "td028ttec1_panel_disable()\n");
- jbt_ret_write_0(ddata, JBT_REG_DISPLAY_OFF);
- jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0x8002);
- jbt_ret_write_0(ddata, JBT_REG_SLEEP_IN);
- jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x00);
- in->ops.dpi->disable(in);
- dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
- }
- static void td028ttec1_panel_set_timings(struct omap_dss_device *dssdev,
- struct videomode *vm)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *in = ddata->in;
- ddata->vm = *vm;
- dssdev->panel.vm = *vm;
- in->ops.dpi->set_timings(in, vm);
- }
- static void td028ttec1_panel_get_timings(struct omap_dss_device *dssdev,
- struct videomode *vm)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- *vm = ddata->vm;
- }
- static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
- struct videomode *vm)
- {
- struct panel_drv_data *ddata = to_panel_data(dssdev);
- struct omap_dss_device *in = ddata->in;
- return in->ops.dpi->check_timings(in, vm);
- }
- static struct omap_dss_driver td028ttec1_ops = {
- .connect = td028ttec1_panel_connect,
- .disconnect = td028ttec1_panel_disconnect,
- .enable = td028ttec1_panel_enable,
- .disable = td028ttec1_panel_disable,
- .set_timings = td028ttec1_panel_set_timings,
- .get_timings = td028ttec1_panel_get_timings,
- .check_timings = td028ttec1_panel_check_timings,
- };
- static int td028ttec1_probe_of(struct spi_device *spi)
- {
- struct device_node *node = spi->dev.of_node;
- struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
- struct omap_dss_device *in;
- in = omapdss_of_find_source_for_first_ep(node);
- if (IS_ERR(in)) {
- dev_err(&spi->dev, "failed to find video source\n");
- return PTR_ERR(in);
- }
- ddata->in = in;
- return 0;
- }
- static int td028ttec1_panel_probe(struct spi_device *spi)
- {
- struct panel_drv_data *ddata;
- struct omap_dss_device *dssdev;
- int r;
- dev_dbg(&spi->dev, "%s\n", __func__);
- spi->bits_per_word = 9;
- spi->mode = SPI_MODE_3;
- r = spi_setup(spi);
- if (r < 0) {
- dev_err(&spi->dev, "spi_setup failed: %d\n", r);
- return r;
- }
- ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
- if (ddata == NULL)
- return -ENOMEM;
- dev_set_drvdata(&spi->dev, ddata);
- ddata->spi_dev = spi;
- if (!spi->dev.of_node)
- return -ENODEV;
- r = td028ttec1_probe_of(spi);
- if (r)
- return r;
- ddata->vm = td028ttec1_panel_vm;
- dssdev = &ddata->dssdev;
- dssdev->dev = &spi->dev;
- dssdev->driver = &td028ttec1_ops;
- dssdev->type = OMAP_DISPLAY_TYPE_DPI;
- dssdev->owner = THIS_MODULE;
- dssdev->panel.vm = ddata->vm;
- dssdev->phy.dpi.data_lines = ddata->data_lines;
- r = omapdss_register_display(dssdev);
- if (r) {
- dev_err(&spi->dev, "Failed to register panel\n");
- goto err_reg;
- }
- return 0;
- err_reg:
- omap_dss_put_device(ddata->in);
- return r;
- }
- static int td028ttec1_panel_remove(struct spi_device *spi)
- {
- struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
- struct omap_dss_device *dssdev = &ddata->dssdev;
- struct omap_dss_device *in = ddata->in;
- dev_dbg(&ddata->spi_dev->dev, "%s\n", __func__);
- omapdss_unregister_display(dssdev);
- td028ttec1_panel_disable(dssdev);
- td028ttec1_panel_disconnect(dssdev);
- omap_dss_put_device(in);
- return 0;
- }
- static const struct of_device_id td028ttec1_of_match[] = {
- { .compatible = "omapdss,toppoly,td028ttec1", },
- {},
- };
- MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
- static struct spi_driver td028ttec1_spi_driver = {
- .probe = td028ttec1_panel_probe,
- .remove = td028ttec1_panel_remove,
- .driver = {
- .name = "panel-tpo-td028ttec1",
- .of_match_table = td028ttec1_of_match,
- .suppress_bind_attrs = true,
- },
- };
- module_spi_driver(td028ttec1_spi_driver);
- MODULE_ALIAS("spi:toppoly,td028ttec1");
- MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
- MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
- MODULE_LICENSE("GPL");
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