drivers/video/scf0403_lcd.c

   1 /*
   2  * scf0403.c -- support for DataImage SCF0403 LCD
   3  *
   4  * Copyright (c) 2013 Adapted from Linux driver:
   5  * Copyright (c) 2012 Anders Electronics plc. All Rights Reserved.
   6  * Copyright (c) 2012 CompuLab, Ltd
   7  *           Dmitry Lifshitz <lifshitz@compulab.co.il>
   8  *           Ilya Ledvich <ilya@compulab.co.il>
   9  * Inspired by Alberto Panizzo <maramaopercheseimorto@gmail.com> &
  10  *      Marek Vasut work in l4f00242t03.c
  11  *
  12  * U-Boot port: Nikita Kiryanov <nikita@compulab.co.il>
  13  *
  14  * SPDX-License-Identifier:     GPL-2.0+
  15  */
  16
  17 #include <common.h>
  18 #include <asm/gpio.h>
  19 #include <spi.h>
  20
  21 struct scf0403_cmd {
  22         u16 cmd;
  23         u16 *params;
  24         int count;
  25 };
  26
  27 struct scf0403_initseq_entry {
  28         struct scf0403_cmd cmd;
  29         int delay_ms;
  30 };
  31
  32 struct scf0403_priv {
  33         struct spi_slave *spi;
  34         unsigned int reset_gpio;
  35         u32 rddid;
  36         struct scf0403_initseq_entry *init_seq;
  37         int seq_size;
  38 };
  39
  40 struct scf0403_priv priv;
  41
  42 #define SCF0403852GGU04_ID 0x000080
  43
  44 /* SCF0403526GGU20 model commands parameters */
  45 static u16 extcmd_params_sn20[]         = {0xff, 0x98, 0x06};
  46 static u16 spiinttype_params_sn20[]     = {0x60};
  47 static u16 bc_params_sn20[]             = {
  48                 0x01, 0x10, 0x61, 0x74, 0x01, 0x01, 0x1B,
  49                 0x12, 0x71, 0x00, 0x00, 0x00, 0x01, 0x01,
  50                 0x05, 0x00, 0xFF, 0xF2, 0x01, 0x00, 0x40,
  51 };
  52 static u16 bd_params_sn20[] = {0x01, 0x23, 0x45, 0x67, 0x01, 0x23, 0x45, 0x67};
  53 static u16 be_params_sn20[] = {
  54                 0x01, 0x22, 0x22, 0xBA, 0xDC, 0x26, 0x28, 0x22, 0x22,
  55 };
  56 static u16 vcom_params_sn20[]           = {0x74};
  57 static u16 vmesur_params_sn20[]         = {0x7F, 0x0F, 0x00};
  58 static u16 powerctl_params_sn20[]       = {0x03, 0x0b, 0x00};
  59 static u16 lvglvolt_params_sn20[]       = {0x08};
  60 static u16 engsetting_params_sn20[]     = {0x00, 0x00, 0x00, 0x00, 0x00, 0x20};
  61 static u16 dispfunc_params_sn20[]       = {0xa0};
  62 static u16 dvddvolt_params_sn20[]       = {0x74};
  63 static u16 dispinv_params_sn20[]        = {0x00, 0x00, 0x00};
  64 static u16 panelres_params_sn20[]       = {0x82};
  65 static u16 framerate_params_sn20[]      = {0x00, 0x13, 0x13};
  66 static u16 timing_params_sn20[]         = {0x80, 0x05, 0x40, 0x28};
  67 static u16 powerctl2_params_sn20[]      = {0x17, 0x75, 0x79, 0x20};
  68 static u16 memaccess_params_sn20[]      = {0x00};
  69 static u16 pixfmt_params_sn20[]         = {0x66};
  70 static u16 pgamma_params_sn20[]         = {
  71                 0x00, 0x03, 0x0b, 0x0c, 0x0e, 0x08, 0xc5, 0x04,
  72                 0x08, 0x0c, 0x13, 0x11, 0x11, 0x14, 0x0c, 0x10,
  73 };
  74 static u16 ngamma_params_sn20[] = {
  75                 0x00, 0x0d, 0x11, 0x0c, 0x0c, 0x04, 0x76, 0x03,
  76                 0x08, 0x0b, 0x16, 0x10, 0x0d, 0x16, 0x0a, 0x00,
  77 };
  78 static u16 tearing_params_sn20[] = {0x00};
  79
  80 /* SCF0403852GGU04 model commands parameters */
  81 static u16 memaccess_params_sn04[]      = {0x08};
  82 static u16 pixfmt_params_sn04[]         = {0x66};
  83 static u16 modectl_params_sn04[]        = {0x01};
  84 static u16 dispfunc_params_sn04[]       = {0x22, 0xe2, 0xFF, 0x04};
  85 static u16 vcom_params_sn04[]           = {0x00, 0x6A};
  86 static u16 pgamma_params_sn04[]         = {
  87                 0x00, 0x07, 0x0d, 0x10, 0x13, 0x19, 0x0f, 0x0c,
  88                 0x05, 0x08, 0x06, 0x13, 0x0f, 0x30, 0x20, 0x1f,
  89 };
  90 static u16 ngamma_params_sn04[]         = {
  91                 0x1F, 0x20, 0x30, 0x0F, 0x13, 0x06, 0x08, 0x05,
  92                 0x0C, 0x0F, 0x19, 0x13, 0x10, 0x0D, 0x07, 0x00,
  93 };
  94 static u16 dispinv_params_sn04[]        = {0x02};
  95
  96 /* Common commands */
  97 static struct scf0403_cmd scf0403_cmd_slpout    = {0x11, NULL, 0};
  98 static struct scf0403_cmd scf0403_cmd_dison     = {0x29, NULL, 0};
  99
 100 /* SCF0403852GGU04 init sequence */
 101 static struct scf0403_initseq_entry scf0403_initseq_sn04[] = {
 102         {{0x36, memaccess_params_sn04,  ARRAY_SIZE(memaccess_params_sn04)}, 0},
 103         {{0x3A, pixfmt_params_sn04,     ARRAY_SIZE(pixfmt_params_sn04)}, 0},
 104         {{0xB6, dispfunc_params_sn04,   ARRAY_SIZE(dispfunc_params_sn04)}, 0},
 105         {{0xC5, vcom_params_sn04,       ARRAY_SIZE(vcom_params_sn04)}, 0},
 106         {{0xE0, pgamma_params_sn04,     ARRAY_SIZE(pgamma_params_sn04)}, 0},
 107         {{0xE1, ngamma_params_sn04,     ARRAY_SIZE(ngamma_params_sn04)}, 20},
 108         {{0xB0, modectl_params_sn04,    ARRAY_SIZE(modectl_params_sn04)}, 0},
 109         {{0xB4, dispinv_params_sn04,    ARRAY_SIZE(dispinv_params_sn04)}, 100},
 110 };
 111
 112 /* SCF0403526GGU20 init sequence */
 113 static struct scf0403_initseq_entry scf0403_initseq_sn20[] = {
 114         {{0xff, extcmd_params_sn20,     ARRAY_SIZE(extcmd_params_sn20)}, 0},
 115         {{0xba, spiinttype_params_sn20, ARRAY_SIZE(spiinttype_params_sn20)}, 0},
 116         {{0xbc, bc_params_sn20,         ARRAY_SIZE(bc_params_sn20)}, 0},
 117         {{0xbd, bd_params_sn20,         ARRAY_SIZE(bd_params_sn20)}, 0},
 118         {{0xbe, be_params_sn20,         ARRAY_SIZE(be_params_sn20)}, 0},
 119         {{0xc7, vcom_params_sn20,       ARRAY_SIZE(vcom_params_sn20)}, 0},
 120         {{0xed, vmesur_params_sn20,     ARRAY_SIZE(vmesur_params_sn20)}, 0},
 121         {{0xc0, powerctl_params_sn20,   ARRAY_SIZE(powerctl_params_sn20)}, 0},
 122         {{0xfc, lvglvolt_params_sn20,   ARRAY_SIZE(lvglvolt_params_sn20)}, 0},
 123         {{0xb6, dispfunc_params_sn20,   ARRAY_SIZE(dispfunc_params_sn20)}, 0},
 124         {{0xdf, engsetting_params_sn20, ARRAY_SIZE(engsetting_params_sn20)}, 0},
 125         {{0xf3, dvddvolt_params_sn20,   ARRAY_SIZE(dvddvolt_params_sn20)}, 0},
 126         {{0xb4, dispinv_params_sn20,    ARRAY_SIZE(dispinv_params_sn20)}, 0},
 127         {{0xf7, panelres_params_sn20,   ARRAY_SIZE(panelres_params_sn20)}, 0},
 128         {{0xb1, framerate_params_sn20,  ARRAY_SIZE(framerate_params_sn20)}, 0},
 129         {{0xf2, timing_params_sn20,     ARRAY_SIZE(timing_params_sn20)}, 0},
 130         {{0xc1, powerctl2_params_sn20,  ARRAY_SIZE(powerctl2_params_sn20)}, 0},
 131         {{0x36, memaccess_params_sn20,  ARRAY_SIZE(memaccess_params_sn20)}, 0},
 132         {{0x3a, pixfmt_params_sn20,     ARRAY_SIZE(pixfmt_params_sn20)}, 0},
 133         {{0xe0, pgamma_params_sn20,     ARRAY_SIZE(pgamma_params_sn20)}, 0},
 134         {{0xe1, ngamma_params_sn20,     ARRAY_SIZE(ngamma_params_sn20)}, 0},
 135         {{0x35, tearing_params_sn20,    ARRAY_SIZE(tearing_params_sn20)}, 0},
 136 };
 137
 138 static void scf0403_gpio_reset(unsigned int gpio)
 139 {
 140         if (!gpio_is_valid(gpio))
 141                 return;
 142
 143         gpio_set_value(gpio, 1);
 144         mdelay(100);
 145         gpio_set_value(gpio, 0);
 146         mdelay(40);
 147         gpio_set_value(gpio, 1);
 148         mdelay(100);
 149 }
 150
 151 static int scf0403_spi_read_rddid(struct spi_slave *spi, u32 *rddid)
 152 {
 153         int error = 0;
 154         u8 ids_buf = 0x00;
 155         u16 dummy_buf = 0x00;
 156         u16 cmd = 0x04;
 157
 158         error = spi_set_wordlen(spi, 9);
 159         if (error)
 160                 return error;
 161
 162         /* Here 9 bits required to transmit a command */
 163         error = spi_xfer(spi, 9, &cmd, NULL, SPI_XFER_ONCE);
 164         if (error)
 165                 return error;
 166
 167         /*
 168          * Here 8 + 1 bits required to arrange extra clock cycle
 169          * before the first data bit.
 170          * According to the datasheet - first parameter is the dummy data.
 171          */
 172         error = spi_xfer(spi, 9, NULL, &dummy_buf, SPI_XFER_ONCE);
 173         if (error)
 174                 return error;
 175
 176         error = spi_set_wordlen(spi, 8);
 177         if (error)
 178                 return error;
 179
 180         /* Read rest of the data */
 181         error = spi_xfer(spi, 8, NULL, &ids_buf, SPI_XFER_ONCE);
 182         if (error)
 183                 return error;
 184
 185         *rddid = ids_buf;
 186
 187         return 0;
 188 }
 189
 190 static int scf0403_spi_transfer(struct spi_slave *spi, struct scf0403_cmd *cmd)
 191 {
 192         int i, error;
 193         u32 command = cmd->cmd;
 194         u32 msg;
 195
 196         error = spi_set_wordlen(spi, 9);
 197         if (error)
 198                 return error;
 199
 200         error = spi_xfer(spi, 9, &command, NULL, SPI_XFER_ONCE);
 201         if (error)
 202                 return error;
 203
 204         for (i = 0; i < cmd->count; i++) {
 205                 msg = (cmd->params[i] | 0x100);
 206                 error = spi_xfer(spi, 9, &msg, NULL, SPI_XFER_ONCE);
 207                 if (error)
 208                         return error;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static void scf0403_lcd_init(struct scf0403_priv *priv)
 215 {
 216         int i;
 217
 218         /* reset LCD */
 219         scf0403_gpio_reset(priv->reset_gpio);
 220
 221         for (i = 0; i < priv->seq_size; i++) {
 222                 if (scf0403_spi_transfer(priv->spi, &priv->init_seq[i].cmd) < 0)
 223                         puts("SPI transfer failed\n");
 224
 225                 mdelay(priv->init_seq[i].delay_ms);
 226         }
 227 }
 228
 229 static int scf0403_request_reset_gpio(unsigned gpio)
 230 {
 231         int err = gpio_request(gpio, "lcd reset");
 232
 233         if (err)
 234                 return err;
 235
 236         err = gpio_direction_output(gpio, 0);
 237         if (err)
 238                 gpio_free(gpio);
 239
 240         return err;
 241 }
 242
 243 int scf0403_init(int reset_gpio)
 244 {
 245         int error;
 246
 247         if (gpio_is_valid(reset_gpio)) {
 248                 error = scf0403_request_reset_gpio(reset_gpio);
 249                 if (error) {
 250                         printf("Failed requesting reset GPIO%d: %d\n",
 251                                reset_gpio, error);
 252                         return error;
 253                 }
 254         }
 255
 256         priv.reset_gpio = reset_gpio;
 257         priv.spi = spi_setup_slave(3, 0, 1000000, SPI_MODE_0);
 258         error = spi_claim_bus(priv.spi);
 259         if (error)
 260                 goto bus_claim_fail;
 261
 262         /* reset LCD */
 263         scf0403_gpio_reset(reset_gpio);
 264
 265         error = scf0403_spi_read_rddid(priv.spi, &priv.rddid);
 266         if (error) {
 267                 puts("IDs read failed\n");
 268                 goto readid_fail;
 269         }
 270
 271         if (priv.rddid == SCF0403852GGU04_ID) {
 272                 priv.init_seq = scf0403_initseq_sn04;
 273                 priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn04);
 274         } else {
 275                 priv.init_seq = scf0403_initseq_sn20;
 276                 priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn20);
 277         }
 278
 279         scf0403_lcd_init(&priv);
 280
 281         /* Start operation */
 282         scf0403_spi_transfer(priv.spi, &scf0403_cmd_dison);
 283         mdelay(100);
 284         scf0403_spi_transfer(priv.spi, &scf0403_cmd_slpout);
 285         spi_release_bus(priv.spi);
 286
 287         return 0;
 288
 289 readid_fail:
 290         spi_release_bus(priv.spi);
 291 bus_claim_fail:
 292         if (gpio_is_valid(priv.reset_gpio))
 293                 gpio_free(priv.reset_gpio);
 294
 295         return error;
 296 }