1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * FB driver for the ILI9163 LCD Controller 4 * 5 * Copyright (C) 2015 Kozhevnikov Anatoly 6 * 7 * Based on ili9325.c by Noralf Tronnes and 8 * .S.U.M.O.T.O.Y. by Max MC Costa (https://github.com/sumotoy/TFT_ILI9163C). 9 */ 10 11#include <linux/module.h> 12#include <linux/kernel.h> 13#include <linux/init.h> 14#include <linux/delay.h> 15#include <video/mipi_display.h> 16 17#include "fbtft.h" 18 19#define DRVNAME "fb_ili9163" 20#define WIDTH 128 21#define HEIGHT 128 22#define BPP 16 23#define FPS 30 24 25#ifdef GAMMA_ADJ 26#define GAMMA_LEN 15 27#define GAMMA_NUM 1 28#define DEFAULT_GAMMA "36 29 12 22 1C 15 42 B7 2F 13 12 0A 11 0B 06\n" 29#endif 30 31/* ILI9163C commands */ 32#define CMD_FRMCTR1 0xB1 /* Frame Rate Control */ 33 /* (In normal mode/Full colors) */ 34#define CMD_FRMCTR2 0xB2 /* Frame Rate Control (In Idle mode/8-colors) */ 35#define CMD_FRMCTR3 0xB3 /* Frame Rate Control */ 36 /* (In Partial mode/full colors) */ 37#define CMD_DINVCTR 0xB4 /* Display Inversion Control */ 38#define CMD_RGBBLK 0xB5 /* RGB Interface Blanking Porch setting */ 39#define CMD_DFUNCTR 0xB6 /* Display Function set 5 */ 40#define CMD_SDRVDIR 0xB7 /* Source Driver Direction Control */ 41#define CMD_GDRVDIR 0xB8 /* Gate Driver Direction Control */ 42 43#define CMD_PWCTR1 0xC0 /* Power_Control1 */ 44#define CMD_PWCTR2 0xC1 /* Power_Control2 */ 45#define CMD_PWCTR3 0xC2 /* Power_Control3 */ 46#define CMD_PWCTR4 0xC3 /* Power_Control4 */ 47#define CMD_PWCTR5 0xC4 /* Power_Control5 */ 48#define CMD_VCOMCTR1 0xC5 /* VCOM_Control 1 */ 49#define CMD_VCOMCTR2 0xC6 /* VCOM_Control 2 */ 50#define CMD_VCOMOFFS 0xC7 /* VCOM Offset Control */ 51#define CMD_PGAMMAC 0xE0 /* Positive Gamma Correction Setting */ 52#define CMD_NGAMMAC 0xE1 /* Negative Gamma Correction Setting */ 53#define CMD_GAMRSEL 0xF2 /* GAM_R_SEL */ 54 55/* 56 * This display: 57 * http://www.ebay.com/itm/Replace-Nokia-5110-LCD-1-44-Red-Serial-128X128-SPI- 58 * Color-TFT-LCD-Display-Module-/271422122271 59 * This particular display has a design error! The controller has 3 pins to 60 * configure to constrain the memory and resolution to a fixed dimension (in 61 * that case 128x128) but they leaved those pins configured for 128x160 so 62 * there was several pixel memory addressing problems. 63 * I solved by setup several parameters that dinamically fix the resolution as 64 * needit so below the parameters for this display. If you have a strain or a 65 * correct display (can happen with chinese) you can copy those parameters and 66 * create setup for different displays. 67 */ 68 69#ifdef RED 70#define __OFFSET 32 /*see note 2 - this is the red version */ 71#else 72#define __OFFSET 0 /*see note 2 - this is the black version */ 73#endif 74 75static int init_display(struct fbtft_par *par) 76{ 77 par->fbtftops.reset(par); 78 79 write_reg(par, MIPI_DCS_SOFT_RESET); /* software reset */ 80 mdelay(500); 81 write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE); /* exit sleep */ 82 mdelay(5); 83 write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); 84 /* default gamma curve 3 */ 85 write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x02); 86#ifdef GAMMA_ADJ 87 write_reg(par, CMD_GAMRSEL, 0x01); /* Enable Gamma adj */ 88#endif 89 write_reg(par, MIPI_DCS_ENTER_NORMAL_MODE); 90 write_reg(par, CMD_DFUNCTR, 0xff, 0x06); 91 /* Frame Rate Control (In normal mode/Full colors) */ 92 write_reg(par, CMD_FRMCTR1, 0x08, 0x02); 93 write_reg(par, CMD_DINVCTR, 0x07); /* display inversion */ 94 /* Set VRH1[4:0] & VC[2:0] for VCI1 & GVDD */ 95 write_reg(par, CMD_PWCTR1, 0x0A, 0x02); 96 /* Set BT[2:0] for AVDD & VCL & VGH & VGL */ 97 write_reg(par, CMD_PWCTR2, 0x02); 98 /* Set VMH[6:0] & VML[6:0] for VOMH & VCOML */ 99 write_reg(par, CMD_VCOMCTR1, 0x50, 0x63); 100 write_reg(par, CMD_VCOMOFFS, 0); 101 102 write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, 0, 0, 0, WIDTH); 103 write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, 0, 0, 0, HEIGHT); 104 105 write_reg(par, MIPI_DCS_SET_DISPLAY_ON); /* display ON */ 106 write_reg(par, MIPI_DCS_WRITE_MEMORY_START); /* Memory Write */ 107 108 return 0; 109} 110 111static void set_addr_win(struct fbtft_par *par, int xs, int ys, 112 int xe, int ye) 113{ 114 switch (par->info->var.rotate) { 115 case 0: 116 write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, 117 xs >> 8, xs & 0xff, xe >> 8, xe & 0xff); 118 write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, 119 (ys + __OFFSET) >> 8, (ys + __OFFSET) & 0xff, 120 (ye + __OFFSET) >> 8, (ye + __OFFSET) & 0xff); 121 break; 122 case 90: 123 write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, 124 (xs + __OFFSET) >> 8, (xs + __OFFSET) & 0xff, 125 (xe + __OFFSET) >> 8, (xe + __OFFSET) & 0xff); 126 write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, 127 ys >> 8, ys & 0xff, ye >> 8, ye & 0xff); 128 break; 129 case 180: 130 case 270: 131 write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, 132 xs >> 8, xs & 0xff, xe >> 8, xe & 0xff); 133 write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, 134 ys >> 8, ys & 0xff, ye >> 8, ye & 0xff); 135 break; 136 default: 137 /* Fix incorrect setting */ 138 par->info->var.rotate = 0; 139 } 140 write_reg(par, MIPI_DCS_WRITE_MEMORY_START); 141} 142 143/* 144 * 7) MY: 1(bottom to top), 0(top to bottom) Row Address Order 145 * 6) MX: 1(R to L), 0(L to R) Column Address Order 146 * 5) MV: 1(Exchanged), 0(normal) Row/Column exchange 147 * 4) ML: 1(bottom to top), 0(top to bottom) Vertical Refresh Order 148 * 3) RGB: 1(BGR), 0(RGB) Color Space 149 * 2) MH: 1(R to L), 0(L to R) Horizontal Refresh Order 150 * 1) 151 * 0) 152 * 153 * MY, MX, MV, ML,RGB, MH, D1, D0 154 * 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 //normal 155 * 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 //Y-Mirror 156 * 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 //X-Mirror 157 * 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 //X-Y-Mirror 158 * 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 //X-Y Exchange 159 * 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 //X-Y Exchange, Y-Mirror 160 * 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 //XY exchange 161 * 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 162 */ 163static int set_var(struct fbtft_par *par) 164{ 165 u8 mactrl_data = 0; /* Avoid compiler warning */ 166 167 switch (par->info->var.rotate) { 168 case 0: 169 mactrl_data = 0x08; 170 break; 171 case 180: 172 mactrl_data = 0xC8; 173 break; 174 case 270: 175 mactrl_data = 0xA8; 176 break; 177 case 90: 178 mactrl_data = 0x68; 179 break; 180 } 181 182 /* Colorspcae */ 183 if (par->bgr) 184 mactrl_data |= BIT(2); 185 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, mactrl_data); 186 write_reg(par, MIPI_DCS_WRITE_MEMORY_START); 187 return 0; 188} 189 190#ifdef GAMMA_ADJ 191#define CURVE(num, idx) curves[(num) * par->gamma.num_values + (idx)] 192static int gamma_adj(struct fbtft_par *par, u32 *curves) 193{ 194 static const unsigned long mask[] = { 195 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 196 0x1f, 0x3f, 0x0f, 0x0f, 0x7f, 0x1f, 197 0x3F, 0x3F, 0x3F, 0x3F, 0x3F}; 198 int i, j; 199 200 for (i = 0; i < GAMMA_NUM; i++) 201 for (j = 0; j < GAMMA_LEN; j++) 202 CURVE(i, j) &= mask[i * par->gamma.num_values + j]; 203 204 write_reg(par, CMD_PGAMMAC, 205 CURVE(0, 0), 206 CURVE(0, 1), 207 CURVE(0, 2), 208 CURVE(0, 3), 209 CURVE(0, 4), 210 CURVE(0, 5), 211 CURVE(0, 6), 212 (CURVE(0, 7) << 4) | CURVE(0, 8), 213 CURVE(0, 9), 214 CURVE(0, 10), 215 CURVE(0, 11), 216 CURVE(0, 12), 217 CURVE(0, 13), 218 CURVE(0, 14), 219 CURVE(0, 15)); 220 221 /* Write Data to GRAM mode */ 222 write_reg(par, MIPI_DCS_WRITE_MEMORY_START); 223 224 return 0; 225} 226 227#undef CURVE 228#endif 229 230static struct fbtft_display display = { 231 .regwidth = 8, 232 .width = WIDTH, 233 .height = HEIGHT, 234 .bpp = BPP, 235 .fps = FPS, 236#ifdef GAMMA_ADJ 237 .gamma_num = GAMMA_NUM, 238 .gamma_len = GAMMA_LEN, 239 .gamma = DEFAULT_GAMMA, 240#endif 241 .fbtftops = { 242 .init_display = init_display, 243 .set_addr_win = set_addr_win, 244 .set_var = set_var, 245#ifdef GAMMA_ADJ 246 .set_gamma = gamma_adj, 247#endif 248 }, 249}; 250 251FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9163", &display); 252 253MODULE_ALIAS("spi:" DRVNAME); 254MODULE_ALIAS("platform:" DRVNAME); 255MODULE_ALIAS("spi:ili9163"); 256MODULE_ALIAS("platform:ili9163"); 257 258MODULE_DESCRIPTION("FB driver for the ILI9163 LCD Controller"); 259MODULE_AUTHOR("Kozhevnikov Anatoly"); 260MODULE_LICENSE("GPL"); 261