drivers/video/scf0403_lcd.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * scf0403.c -- support for DataImage SCF0403 LCD
   4  *
   5  * Copyright (c) 2013 Adapted from Linux driver:
   6  * Copyright (c) 2012 Anders Electronics plc. All Rights Reserved.
   7  * Copyright (c) 2012 CompuLab, Ltd
   8  *           Dmitry Lifshitz <lifshitz@compulab.co.il>
   9  *           Ilya Ledvich <ilya@compulab.co.il>
  10  * Inspired by Alberto Panizzo <maramaopercheseimorto@gmail.com> &
  11  *      Marek Vasut work in l4f00242t03.c
  12  *
  13  * U-Boot port: Nikita Kiryanov <nikita@compulab.co.il>
  14  */
  15
  16 #include <common.h>
  17 #include <asm/gpio.h>
  18 #include <spi.h>
  19
  20 struct scf0403_cmd {
  21         u16 cmd;
  22         u16 *params;
  23         int count;
  24 };
  25
  26 struct scf0403_initseq_entry {
  27         struct scf0403_cmd cmd;
  28         int delay_ms;
  29 };
  30
  31 struct scf0403_priv {
  32         struct spi_slave *spi;
  33         unsigned int reset_gpio;
  34         u32 rddid;
  35         struct scf0403_initseq_entry *init_seq;
  36         int seq_size;
  37 };
  38
  39 struct scf0403_priv priv;
  40
  41 #define SCF0403852GGU04_ID 0x000080
  42
  43 /* SCF0403526GGU20 model commands parameters */
  44 static u16 extcmd_params_sn20[]         = {0xff, 0x98, 0x06};
  45 static u16 spiinttype_params_sn20[]     = {0x60};
  46 static u16 bc_params_sn20[]             = {
  47                 0x01, 0x10, 0x61, 0x74, 0x01, 0x01, 0x1B,
  48                 0x12, 0x71, 0x00, 0x00, 0x00, 0x01, 0x01,
  49                 0x05, 0x00, 0xFF, 0xF2, 0x01, 0x00, 0x40,
  50 };
  51 static u16 bd_params_sn20[] = {0x01, 0x23, 0x45, 0x67, 0x01, 0x23, 0x45, 0x67};
  52 static u16 be_params_sn20[] = {
  53                 0x01, 0x22, 0x22, 0xBA, 0xDC, 0x26, 0x28, 0x22, 0x22,
  54 };
  55 static u16 vcom_params_sn20[]           = {0x74};
  56 static u16 vmesur_params_sn20[]         = {0x7F, 0x0F, 0x00};
  57 static u16 powerctl_params_sn20[]       = {0x03, 0x0b, 0x00};
  58 static u16 lvglvolt_params_sn20[]       = {0x08};
  59 static u16 engsetting_params_sn20[]     = {0x00, 0x00, 0x00, 0x00, 0x00, 0x20};
  60 static u16 dispfunc_params_sn20[]       = {0xa0};
  61 static u16 dvddvolt_params_sn20[]       = {0x74};
  62 static u16 dispinv_params_sn20[]        = {0x00, 0x00, 0x00};
  63 static u16 panelres_params_sn20[]       = {0x82};
  64 static u16 framerate_params_sn20[]      = {0x00, 0x13, 0x13};
  65 static u16 timing_params_sn20[]         = {0x80, 0x05, 0x40, 0x28};
  66 static u16 powerctl2_params_sn20[]      = {0x17, 0x75, 0x79, 0x20};
  67 static u16 memaccess_params_sn20[]      = {0x00};
  68 static u16 pixfmt_params_sn20[]         = {0x66};
  69 static u16 pgamma_params_sn20[]         = {
  70                 0x00, 0x03, 0x0b, 0x0c, 0x0e, 0x08, 0xc5, 0x04,
  71                 0x08, 0x0c, 0x13, 0x11, 0x11, 0x14, 0x0c, 0x10,
  72 };
  73 static u16 ngamma_params_sn20[] = {
  74                 0x00, 0x0d, 0x11, 0x0c, 0x0c, 0x04, 0x76, 0x03,
  75                 0x08, 0x0b, 0x16, 0x10, 0x0d, 0x16, 0x0a, 0x00,
  76 };
  77 static u16 tearing_params_sn20[] = {0x00};
  78
  79 /* SCF0403852GGU04 model commands parameters */
  80 static u16 memaccess_params_sn04[]      = {0x08};
  81 static u16 pixfmt_params_sn04[]         = {0x66};
  82 static u16 modectl_params_sn04[]        = {0x01};
  83 static u16 dispfunc_params_sn04[]       = {0x22, 0xe2, 0xFF, 0x04};
  84 static u16 vcom_params_sn04[]           = {0x00, 0x6A};
  85 static u16 pgamma_params_sn04[]         = {
  86                 0x00, 0x07, 0x0d, 0x10, 0x13, 0x19, 0x0f, 0x0c,
  87                 0x05, 0x08, 0x06, 0x13, 0x0f, 0x30, 0x20, 0x1f,
  88 };
  89 static u16 ngamma_params_sn04[]         = {
  90                 0x1F, 0x20, 0x30, 0x0F, 0x13, 0x06, 0x08, 0x05,
  91                 0x0C, 0x0F, 0x19, 0x13, 0x10, 0x0D, 0x07, 0x00,
  92 };
  93 static u16 dispinv_params_sn04[]        = {0x02};
  94
  95 /* Common commands */
  96 static struct scf0403_cmd scf0403_cmd_slpout    = {0x11, NULL, 0};
  97 static struct scf0403_cmd scf0403_cmd_dison     = {0x29, NULL, 0};
  98
  99 /* SCF0403852GGU04 init sequence */
 100 static struct scf0403_initseq_entry scf0403_initseq_sn04[] = {
 101         {{0x36, memaccess_params_sn04,  ARRAY_SIZE(memaccess_params_sn04)}, 0},
 102         {{0x3A, pixfmt_params_sn04,     ARRAY_SIZE(pixfmt_params_sn04)}, 0},
 103         {{0xB6, dispfunc_params_sn04,   ARRAY_SIZE(dispfunc_params_sn04)}, 0},
 104         {{0xC5, vcom_params_sn04,       ARRAY_SIZE(vcom_params_sn04)}, 0},
 105         {{0xE0, pgamma_params_sn04,     ARRAY_SIZE(pgamma_params_sn04)}, 0},
 106         {{0xE1, ngamma_params_sn04,     ARRAY_SIZE(ngamma_params_sn04)}, 20},
 107         {{0xB0, modectl_params_sn04,    ARRAY_SIZE(modectl_params_sn04)}, 0},
 108         {{0xB4, dispinv_params_sn04,    ARRAY_SIZE(dispinv_params_sn04)}, 100},
 109 };
 110
 111 /* SCF0403526GGU20 init sequence */
 112 static struct scf0403_initseq_entry scf0403_initseq_sn20[] = {
 113         {{0xff, extcmd_params_sn20,     ARRAY_SIZE(extcmd_params_sn20)}, 0},
 114         {{0xba, spiinttype_params_sn20, ARRAY_SIZE(spiinttype_params_sn20)}, 0},
 115         {{0xbc, bc_params_sn20,         ARRAY_SIZE(bc_params_sn20)}, 0},
 116         {{0xbd, bd_params_sn20,         ARRAY_SIZE(bd_params_sn20)}, 0},
 117         {{0xbe, be_params_sn20,         ARRAY_SIZE(be_params_sn20)}, 0},
 118         {{0xc7, vcom_params_sn20,       ARRAY_SIZE(vcom_params_sn20)}, 0},
 119         {{0xed, vmesur_params_sn20,     ARRAY_SIZE(vmesur_params_sn20)}, 0},
 120         {{0xc0, powerctl_params_sn20,   ARRAY_SIZE(powerctl_params_sn20)}, 0},
 121         {{0xfc, lvglvolt_params_sn20,   ARRAY_SIZE(lvglvolt_params_sn20)}, 0},
 122         {{0xb6, dispfunc_params_sn20,   ARRAY_SIZE(dispfunc_params_sn20)}, 0},
 123         {{0xdf, engsetting_params_sn20, ARRAY_SIZE(engsetting_params_sn20)}, 0},
 124         {{0xf3, dvddvolt_params_sn20,   ARRAY_SIZE(dvddvolt_params_sn20)}, 0},
 125         {{0xb4, dispinv_params_sn20,    ARRAY_SIZE(dispinv_params_sn20)}, 0},
 126         {{0xf7, panelres_params_sn20,   ARRAY_SIZE(panelres_params_sn20)}, 0},
 127         {{0xb1, framerate_params_sn20,  ARRAY_SIZE(framerate_params_sn20)}, 0},
 128         {{0xf2, timing_params_sn20,     ARRAY_SIZE(timing_params_sn20)}, 0},
 129         {{0xc1, powerctl2_params_sn20,  ARRAY_SIZE(powerctl2_params_sn20)}, 0},
 130         {{0x36, memaccess_params_sn20,  ARRAY_SIZE(memaccess_params_sn20)}, 0},
 131         {{0x3a, pixfmt_params_sn20,     ARRAY_SIZE(pixfmt_params_sn20)}, 0},
 132         {{0xe0, pgamma_params_sn20,     ARRAY_SIZE(pgamma_params_sn20)}, 0},
 133         {{0xe1, ngamma_params_sn20,     ARRAY_SIZE(ngamma_params_sn20)}, 0},
 134         {{0x35, tearing_params_sn20,    ARRAY_SIZE(tearing_params_sn20)}, 0},
 135 };
 136
 137 static void scf0403_gpio_reset(unsigned int gpio)
 138 {
 139         if (!gpio_is_valid(gpio))
 140                 return;
 141
 142         gpio_set_value(gpio, 1);
 143         mdelay(100);
 144         gpio_set_value(gpio, 0);
 145         mdelay(40);
 146         gpio_set_value(gpio, 1);
 147         mdelay(100);
 148 }
 149
 150 static int scf0403_spi_read_rddid(struct spi_slave *spi, u32 *rddid)
 151 {
 152         int error = 0;
 153         u8 ids_buf = 0x00;
 154         u16 dummy_buf = 0x00;
 155         u16 cmd = 0x04;
 156
 157         error = spi_set_wordlen(spi, 9);
 158         if (error)
 159                 return error;
 160
 161         /* Here 9 bits required to transmit a command */
 162         error = spi_xfer(spi, 9, &cmd, NULL, SPI_XFER_ONCE);
 163         if (error)
 164                 return error;
 165
 166         /*
 167          * Here 8 + 1 bits required to arrange extra clock cycle
 168          * before the first data bit.
 169          * According to the datasheet - first parameter is the dummy data.
 170          */
 171         error = spi_xfer(spi, 9, NULL, &dummy_buf, SPI_XFER_ONCE);
 172         if (error)
 173                 return error;
 174
 175         error = spi_set_wordlen(spi, 8);
 176         if (error)
 177                 return error;
 178
 179         /* Read rest of the data */
 180         error = spi_xfer(spi, 8, NULL, &ids_buf, SPI_XFER_ONCE);
 181         if (error)
 182                 return error;
 183
 184         *rddid = ids_buf;
 185
 186         return 0;
 187 }
 188
 189 static int scf0403_spi_transfer(struct spi_slave *spi, struct scf0403_cmd *cmd)
 190 {
 191         int i, error;
 192         u32 command = cmd->cmd;
 193         u32 msg;
 194
 195         error = spi_set_wordlen(spi, 9);
 196         if (error)
 197                 return error;
 198
 199         error = spi_xfer(spi, 9, &command, NULL, SPI_XFER_ONCE);
 200         if (error)
 201                 return error;
 202
 203         for (i = 0; i < cmd->count; i++) {
 204                 msg = (cmd->params[i] | 0x100);
 205                 error = spi_xfer(spi, 9, &msg, NULL, SPI_XFER_ONCE);
 206                 if (error)
 207                         return error;
 208         }
 209
 210         return 0;
 211 }
 212
 213 static void scf0403_lcd_init(struct scf0403_priv *priv)
 214 {
 215         int i;
 216
 217         /* reset LCD */
 218         scf0403_gpio_reset(priv->reset_gpio);
 219
 220         for (i = 0; i < priv->seq_size; i++) {
 221                 if (scf0403_spi_transfer(priv->spi, &priv->init_seq[i].cmd) < 0)
 222                         puts("SPI transfer failed\n");
 223
 224                 mdelay(priv->init_seq[i].delay_ms);
 225         }
 226 }
 227
 228 static int scf0403_request_reset_gpio(unsigned gpio)
 229 {
 230         int err = gpio_request(gpio, "lcd reset");
 231
 232         if (err)
 233                 return err;
 234
 235         err = gpio_direction_output(gpio, 0);
 236         if (err)
 237                 gpio_free(gpio);
 238
 239         return err;
 240 }
 241
 242 int scf0403_init(int reset_gpio)
 243 {
 244         int error;
 245
 246         if (gpio_is_valid(reset_gpio)) {
 247                 error = scf0403_request_reset_gpio(reset_gpio);
 248                 if (error) {
 249                         printf("Failed requesting reset GPIO%d: %d\n",
 250                                reset_gpio, error);
 251                         return error;
 252                 }
 253         }
 254
 255         priv.reset_gpio = reset_gpio;
 256         priv.spi = spi_setup_slave(3, 0, 1000000, SPI_MODE_0);
 257         error = spi_claim_bus(priv.spi);
 258         if (error)
 259                 goto bus_claim_fail;
 260
 261         /* reset LCD */
 262         scf0403_gpio_reset(reset_gpio);
 263
 264         error = scf0403_spi_read_rddid(priv.spi, &priv.rddid);
 265         if (error) {
 266                 puts("IDs read failed\n");
 267                 goto readid_fail;
 268         }
 269
 270         if (priv.rddid == SCF0403852GGU04_ID) {
 271                 priv.init_seq = scf0403_initseq_sn04;
 272                 priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn04);
 273         } else {
 274                 priv.init_seq = scf0403_initseq_sn20;
 275                 priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn20);
 276         }
 277
 278         scf0403_lcd_init(&priv);
 279
 280         /* Start operation */
 281         scf0403_spi_transfer(priv.spi, &scf0403_cmd_dison);
 282         mdelay(100);
 283         scf0403_spi_transfer(priv.spi, &scf0403_cmd_slpout);
 284         spi_release_bus(priv.spi);
 285
 286         return 0;
 287
 288 readid_fail:
 289         spi_release_bus(priv.spi);
 290 bus_claim_fail:
 291         if (gpio_is_valid(priv.reset_gpio))
 292                 gpio_free(priv.reset_gpio);
 293
 294         return error;
 295 }