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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * tdo24m - SPI-based drivers for Toppoly TDO24M series LCD panels4 *5 * Copyright (C) 2008 Marvell International Ltd.6 * Eric Miao <eric.miao@marvell.com>7 */8 9#include <linux/module.h>10#include <linux/kernel.h>11#include <linux/init.h>12#include <linux/device.h>13#include <linux/spi/spi.h>14#include <linux/spi/tdo24m.h>15#include <linux/fb.h>16#include <linux/lcd.h>17#include <linux/slab.h>18 19#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)20 21#define TDO24M_SPI_BUFF_SIZE (4)22#define MODE_QVGA 023#define MODE_VGA 124 25struct tdo24m {26 struct spi_device *spi_dev;27 struct lcd_device *lcd_dev;28 29 struct spi_message msg;30 struct spi_transfer xfer;31 uint8_t *buf;32 33 int (*adj_mode)(struct tdo24m *lcd, int mode);34 int color_invert;35 36 int power;37 int mode;38};39 40/* use bit 30, 31 as the indicator of command parameter number */41#define CMD0(x) ((0 << 30) | (x))42#define CMD1(x, x1) ((1 << 30) | ((x) << 9) | 0x100 | (x1))43#define CMD2(x, x1, x2) ((2 << 30) | ((x) << 18) | 0x20000 |\44 ((x1) << 9) | 0x100 | (x2))45#define CMD_NULL (-1)46 47static const uint32_t lcd_panel_reset[] = {48 CMD0(0x1), /* reset */49 CMD0(0x0), /* nop */50 CMD0(0x0), /* nop */51 CMD0(0x0), /* nop */52 CMD_NULL,53};54 55static const uint32_t lcd_panel_on[] = {56 CMD0(0x29), /* Display ON */57 CMD2(0xB8, 0xFF, 0xF9), /* Output Control */58 CMD0(0x11), /* Sleep out */59 CMD1(0xB0, 0x16), /* Wake */60 CMD_NULL,61};62 63static const uint32_t lcd_panel_off[] = {64 CMD0(0x28), /* Display OFF */65 CMD2(0xB8, 0x80, 0x02), /* Output Control */66 CMD0(0x10), /* Sleep in */67 CMD1(0xB0, 0x00), /* Deep stand by in */68 CMD_NULL,69};70 71static const uint32_t lcd_vga_pass_through_tdo24m[] = {72 CMD1(0xB0, 0x16),73 CMD1(0xBC, 0x80),74 CMD1(0xE1, 0x00),75 CMD1(0x36, 0x50),76 CMD1(0x3B, 0x00),77 CMD_NULL,78};79 80static const uint32_t lcd_qvga_pass_through_tdo24m[] = {81 CMD1(0xB0, 0x16),82 CMD1(0xBC, 0x81),83 CMD1(0xE1, 0x00),84 CMD1(0x36, 0x50),85 CMD1(0x3B, 0x22),86 CMD_NULL,87};88 89static const uint32_t lcd_vga_transfer_tdo24m[] = {90 CMD1(0xcf, 0x02), /* Blanking period control (1) */91 CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */92 CMD1(0xd1, 0x01), /* CKV timing control on/off */93 CMD2(0xd2, 0x14, 0x00), /* CKV 1,2 timing control */94 CMD2(0xd3, 0x1a, 0x0f), /* OEV timing control */95 CMD2(0xd4, 0x1f, 0xaf), /* ASW timing control (1) */96 CMD1(0xd5, 0x14), /* ASW timing control (2) */97 CMD0(0x21), /* Invert for normally black display */98 CMD0(0x29), /* Display on */99 CMD_NULL,100};101 102static const uint32_t lcd_qvga_transfer[] = {103 CMD1(0xd6, 0x02), /* Blanking period control (1) */104 CMD2(0xd7, 0x08, 0x04), /* Blanking period control (2) */105 CMD1(0xd8, 0x01), /* CKV timing control on/off */106 CMD2(0xd9, 0x00, 0x08), /* CKV 1,2 timing control */107 CMD2(0xde, 0x05, 0x0a), /* OEV timing control */108 CMD2(0xdf, 0x0a, 0x19), /* ASW timing control (1) */109 CMD1(0xe0, 0x0a), /* ASW timing control (2) */110 CMD0(0x21), /* Invert for normally black display */111 CMD0(0x29), /* Display on */112 CMD_NULL,113};114 115static const uint32_t lcd_vga_pass_through_tdo35s[] = {116 CMD1(0xB0, 0x16),117 CMD1(0xBC, 0x80),118 CMD1(0xE1, 0x00),119 CMD1(0x3B, 0x00),120 CMD_NULL,121};122 123static const uint32_t lcd_qvga_pass_through_tdo35s[] = {124 CMD1(0xB0, 0x16),125 CMD1(0xBC, 0x81),126 CMD1(0xE1, 0x00),127 CMD1(0x3B, 0x22),128 CMD_NULL,129};130 131static const uint32_t lcd_vga_transfer_tdo35s[] = {132 CMD1(0xcf, 0x02), /* Blanking period control (1) */133 CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */134 CMD1(0xd1, 0x01), /* CKV timing control on/off */135 CMD2(0xd2, 0x00, 0x1e), /* CKV 1,2 timing control */136 CMD2(0xd3, 0x14, 0x28), /* OEV timing control */137 CMD2(0xd4, 0x28, 0x64), /* ASW timing control (1) */138 CMD1(0xd5, 0x28), /* ASW timing control (2) */139 CMD0(0x21), /* Invert for normally black display */140 CMD0(0x29), /* Display on */141 CMD_NULL,142};143 144static const uint32_t lcd_panel_config[] = {145 CMD2(0xb8, 0xff, 0xf9), /* Output control */146 CMD0(0x11), /* sleep out */147 CMD1(0xba, 0x01), /* Display mode (1) */148 CMD1(0xbb, 0x00), /* Display mode (2) */149 CMD1(0x3a, 0x60), /* Display mode 18-bit RGB */150 CMD1(0xbf, 0x10), /* Drive system change control */151 CMD1(0xb1, 0x56), /* Booster operation setup */152 CMD1(0xb2, 0x33), /* Booster mode setup */153 CMD1(0xb3, 0x11), /* Booster frequency setup */154 CMD1(0xb4, 0x02), /* Op amp/system clock */155 CMD1(0xb5, 0x35), /* VCS voltage */156 CMD1(0xb6, 0x40), /* VCOM voltage */157 CMD1(0xb7, 0x03), /* External display signal */158 CMD1(0xbd, 0x00), /* ASW slew rate */159 CMD1(0xbe, 0x00), /* Dummy data for QuadData operation */160 CMD1(0xc0, 0x11), /* Sleep out FR count (A) */161 CMD1(0xc1, 0x11), /* Sleep out FR count (B) */162 CMD1(0xc2, 0x11), /* Sleep out FR count (C) */163 CMD2(0xc3, 0x20, 0x40), /* Sleep out FR count (D) */164 CMD2(0xc4, 0x60, 0xc0), /* Sleep out FR count (E) */165 CMD2(0xc5, 0x10, 0x20), /* Sleep out FR count (F) */166 CMD1(0xc6, 0xc0), /* Sleep out FR count (G) */167 CMD2(0xc7, 0x33, 0x43), /* Gamma 1 fine tuning (1) */168 CMD1(0xc8, 0x44), /* Gamma 1 fine tuning (2) */169 CMD1(0xc9, 0x33), /* Gamma 1 inclination adjustment */170 CMD1(0xca, 0x00), /* Gamma 1 blue offset adjustment */171 CMD2(0xec, 0x01, 0xf0), /* Horizontal clock cycles */172 CMD_NULL,173};174 175static int tdo24m_writes(struct tdo24m *lcd, const uint32_t *array)176{177 struct spi_transfer *x = &lcd->xfer;178 const uint32_t *p = array;179 uint32_t data;180 int nparams, err = 0;181 182 for (; *p != CMD_NULL; p++) {183 if (!lcd->color_invert && *p == CMD0(0x21))184 continue;185 186 nparams = (*p >> 30) & 0x3;187 188 data = *p << (7 - nparams);189 switch (nparams) {190 case 0:191 lcd->buf[0] = (data >> 8) & 0xff;192 lcd->buf[1] = data & 0xff;193 break;194 case 1:195 lcd->buf[0] = (data >> 16) & 0xff;196 lcd->buf[1] = (data >> 8) & 0xff;197 lcd->buf[2] = data & 0xff;198 break;199 case 2:200 lcd->buf[0] = (data >> 24) & 0xff;201 lcd->buf[1] = (data >> 16) & 0xff;202 lcd->buf[2] = (data >> 8) & 0xff;203 lcd->buf[3] = data & 0xff;204 break;205 default:206 continue;207 }208 x->len = nparams + 2;209 err = spi_sync(lcd->spi_dev, &lcd->msg);210 if (err)211 break;212 }213 214 return err;215}216 217static int tdo24m_adj_mode(struct tdo24m *lcd, int mode)218{219 switch (mode) {220 case MODE_VGA:221 tdo24m_writes(lcd, lcd_vga_pass_through_tdo24m);222 tdo24m_writes(lcd, lcd_panel_config);223 tdo24m_writes(lcd, lcd_vga_transfer_tdo24m);224 break;225 case MODE_QVGA:226 tdo24m_writes(lcd, lcd_qvga_pass_through_tdo24m);227 tdo24m_writes(lcd, lcd_panel_config);228 tdo24m_writes(lcd, lcd_qvga_transfer);229 break;230 default:231 return -EINVAL;232 }233 234 lcd->mode = mode;235 return 0;236}237 238static int tdo35s_adj_mode(struct tdo24m *lcd, int mode)239{240 switch (mode) {241 case MODE_VGA:242 tdo24m_writes(lcd, lcd_vga_pass_through_tdo35s);243 tdo24m_writes(lcd, lcd_panel_config);244 tdo24m_writes(lcd, lcd_vga_transfer_tdo35s);245 break;246 case MODE_QVGA:247 tdo24m_writes(lcd, lcd_qvga_pass_through_tdo35s);248 tdo24m_writes(lcd, lcd_panel_config);249 tdo24m_writes(lcd, lcd_qvga_transfer);250 break;251 default:252 return -EINVAL;253 }254 255 lcd->mode = mode;256 return 0;257}258 259static int tdo24m_power_on(struct tdo24m *lcd)260{261 int err;262 263 err = tdo24m_writes(lcd, lcd_panel_on);264 if (err)265 goto out;266 267 err = tdo24m_writes(lcd, lcd_panel_reset);268 if (err)269 goto out;270 271 err = lcd->adj_mode(lcd, lcd->mode);272out:273 return err;274}275 276static int tdo24m_power_off(struct tdo24m *lcd)277{278 return tdo24m_writes(lcd, lcd_panel_off);279}280 281static int tdo24m_power(struct tdo24m *lcd, int power)282{283 int ret = 0;284 285 if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))286 ret = tdo24m_power_on(lcd);287 else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))288 ret = tdo24m_power_off(lcd);289 290 if (!ret)291 lcd->power = power;292 293 return ret;294}295 296 297static int tdo24m_set_power(struct lcd_device *ld, int power)298{299 struct tdo24m *lcd = lcd_get_data(ld);300 301 return tdo24m_power(lcd, power);302}303 304static int tdo24m_get_power(struct lcd_device *ld)305{306 struct tdo24m *lcd = lcd_get_data(ld);307 308 return lcd->power;309}310 311static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m)312{313 struct tdo24m *lcd = lcd_get_data(ld);314 int mode = MODE_QVGA;315 316 if (m->xres == 640 || m->xres == 480)317 mode = MODE_VGA;318 319 if (lcd->mode == mode)320 return 0;321 322 return lcd->adj_mode(lcd, mode);323}324 325static const struct lcd_ops tdo24m_ops = {326 .get_power = tdo24m_get_power,327 .set_power = tdo24m_set_power,328 .set_mode = tdo24m_set_mode,329};330 331static int tdo24m_probe(struct spi_device *spi)332{333 struct tdo24m *lcd;334 struct spi_message *m;335 struct spi_transfer *x;336 struct tdo24m_platform_data *pdata;337 enum tdo24m_model model;338 int err;339 340 pdata = dev_get_platdata(&spi->dev);341 if (pdata)342 model = pdata->model;343 else344 model = TDO24M;345 346 spi->bits_per_word = 8;347 spi->mode = SPI_MODE_3;348 err = spi_setup(spi);349 if (err)350 return err;351 352 lcd = devm_kzalloc(&spi->dev, sizeof(struct tdo24m), GFP_KERNEL);353 if (!lcd)354 return -ENOMEM;355 356 lcd->spi_dev = spi;357 lcd->power = FB_BLANK_POWERDOWN;358 lcd->mode = MODE_VGA; /* default to VGA */359 360 lcd->buf = devm_kzalloc(&spi->dev, TDO24M_SPI_BUFF_SIZE, GFP_KERNEL);361 if (lcd->buf == NULL)362 return -ENOMEM;363 364 m = &lcd->msg;365 x = &lcd->xfer;366 367 spi_message_init(m);368 369 x->cs_change = 0;370 x->tx_buf = &lcd->buf[0];371 spi_message_add_tail(x, m);372 373 switch (model) {374 case TDO24M:375 lcd->color_invert = 1;376 lcd->adj_mode = tdo24m_adj_mode;377 break;378 case TDO35S:379 lcd->adj_mode = tdo35s_adj_mode;380 lcd->color_invert = 0;381 break;382 default:383 dev_err(&spi->dev, "Unsupported model");384 return -EINVAL;385 }386 387 lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "tdo24m", &spi->dev,388 lcd, &tdo24m_ops);389 if (IS_ERR(lcd->lcd_dev))390 return PTR_ERR(lcd->lcd_dev);391 392 spi_set_drvdata(spi, lcd);393 err = tdo24m_power(lcd, FB_BLANK_UNBLANK);394 if (err)395 return err;396 397 return 0;398}399 400static void tdo24m_remove(struct spi_device *spi)401{402 struct tdo24m *lcd = spi_get_drvdata(spi);403 404 tdo24m_power(lcd, FB_BLANK_POWERDOWN);405}406 407#ifdef CONFIG_PM_SLEEP408static int tdo24m_suspend(struct device *dev)409{410 struct tdo24m *lcd = dev_get_drvdata(dev);411 412 return tdo24m_power(lcd, FB_BLANK_POWERDOWN);413}414 415static int tdo24m_resume(struct device *dev)416{417 struct tdo24m *lcd = dev_get_drvdata(dev);418 419 return tdo24m_power(lcd, FB_BLANK_UNBLANK);420}421#endif422 423static SIMPLE_DEV_PM_OPS(tdo24m_pm_ops, tdo24m_suspend, tdo24m_resume);424 425/* Power down all displays on reboot, poweroff or halt */426static void tdo24m_shutdown(struct spi_device *spi)427{428 struct tdo24m *lcd = spi_get_drvdata(spi);429 430 tdo24m_power(lcd, FB_BLANK_POWERDOWN);431}432 433static struct spi_driver tdo24m_driver = {434 .driver = {435 .name = "tdo24m",436 .pm = &tdo24m_pm_ops,437 },438 .probe = tdo24m_probe,439 .remove = tdo24m_remove,440 .shutdown = tdo24m_shutdown,441};442 443module_spi_driver(tdo24m_driver);444 445MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");446MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel");447MODULE_LICENSE("GPL");448MODULE_ALIAS("spi:tdo24m");449