| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * FB driver for the ILI9163 LCD Controller |
| * |
| * Copyright (C) 2015 Kozhevnikov Anatoly |
| * |
| * Based on ili9325.c by Noralf Tronnes and |
| * .S.U.M.O.T.O.Y. by Max MC Costa (https://github.com/sumotoy/TFT_ILI9163C). |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <video/mipi_display.h> |
| |
| #include "fbtft.h" |
| |
| #define DRVNAME "fb_ili9163" |
| #define WIDTH 128 |
| #define HEIGHT 128 |
| #define BPP 16 |
| #define FPS 30 |
| |
| #ifdef GAMMA_ADJ |
| #define GAMMA_LEN 15 |
| #define GAMMA_NUM 1 |
| #define DEFAULT_GAMMA "36 29 12 22 1C 15 42 B7 2F 13 12 0A 11 0B 06\n" |
| #endif |
| |
| /* ILI9163C commands */ |
| #define CMD_FRMCTR1 0xB1 /* Frame Rate Control */ |
| /* (In normal mode/Full colors) */ |
| #define CMD_FRMCTR2 0xB2 /* Frame Rate Control (In Idle mode/8-colors) */ |
| #define CMD_FRMCTR3 0xB3 /* Frame Rate Control */ |
| /* (In Partial mode/full colors) */ |
| #define CMD_DINVCTR 0xB4 /* Display Inversion Control */ |
| #define CMD_RGBBLK 0xB5 /* RGB Interface Blanking Porch setting */ |
| #define CMD_DFUNCTR 0xB6 /* Display Function set 5 */ |
| #define CMD_SDRVDIR 0xB7 /* Source Driver Direction Control */ |
| #define CMD_GDRVDIR 0xB8 /* Gate Driver Direction Control */ |
| |
| #define CMD_PWCTR1 0xC0 /* Power_Control1 */ |
| #define CMD_PWCTR2 0xC1 /* Power_Control2 */ |
| #define CMD_PWCTR3 0xC2 /* Power_Control3 */ |
| #define CMD_PWCTR4 0xC3 /* Power_Control4 */ |
| #define CMD_PWCTR5 0xC4 /* Power_Control5 */ |
| #define CMD_VCOMCTR1 0xC5 /* VCOM_Control 1 */ |
| #define CMD_VCOMCTR2 0xC6 /* VCOM_Control 2 */ |
| #define CMD_VCOMOFFS 0xC7 /* VCOM Offset Control */ |
| #define CMD_PGAMMAC 0xE0 /* Positive Gamma Correction Setting */ |
| #define CMD_NGAMMAC 0xE1 /* Negative Gamma Correction Setting */ |
| #define CMD_GAMRSEL 0xF2 /* GAM_R_SEL */ |
| |
| /* |
| * This display: |
| * http://www.ebay.com/itm/Replace-Nokia-5110-LCD-1-44-Red-Serial-128X128-SPI- |
| * Color-TFT-LCD-Display-Module-/271422122271 |
| * This particular display has a design error! The controller has 3 pins to |
| * configure to constrain the memory and resolution to a fixed dimension (in |
| * that case 128x128) but they leaved those pins configured for 128x160 so |
| * there was several pixel memory addressing problems. |
| * I solved by setup several parameters that dinamically fix the resolution as |
| * needit so below the parameters for this display. If you have a strain or a |
| * correct display (can happen with chinese) you can copy those parameters and |
| * create setup for different displays. |
| */ |
| |
| #ifdef RED |
| #define __OFFSET 32 /*see note 2 - this is the red version */ |
| #else |
| #define __OFFSET 0 /*see note 2 - this is the black version */ |
| #endif |
| |
| static int init_display(struct fbtft_par *par) |
| { |
| par->fbtftops.reset(par); |
| |
| write_reg(par, MIPI_DCS_SOFT_RESET); /* software reset */ |
| mdelay(500); |
| write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE); /* exit sleep */ |
| mdelay(5); |
| write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); |
| /* default gamma curve 3 */ |
| write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x02); |
| #ifdef GAMMA_ADJ |
| write_reg(par, CMD_GAMRSEL, 0x01); /* Enable Gamma adj */ |
| #endif |
| write_reg(par, MIPI_DCS_ENTER_NORMAL_MODE); |
| write_reg(par, CMD_DFUNCTR, 0xff, 0x06); |
| /* Frame Rate Control (In normal mode/Full colors) */ |
| write_reg(par, CMD_FRMCTR1, 0x08, 0x02); |
| write_reg(par, CMD_DINVCTR, 0x07); /* display inversion */ |
| /* Set VRH1[4:0] & VC[2:0] for VCI1 & GVDD */ |
| write_reg(par, CMD_PWCTR1, 0x0A, 0x02); |
| /* Set BT[2:0] for AVDD & VCL & VGH & VGL */ |
| write_reg(par, CMD_PWCTR2, 0x02); |
| /* Set VMH[6:0] & VML[6:0] for VOMH & VCOML */ |
| write_reg(par, CMD_VCOMCTR1, 0x50, 0x63); |
| write_reg(par, CMD_VCOMOFFS, 0); |
| |
| write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, 0, 0, 0, WIDTH); |
| write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, 0, 0, 0, HEIGHT); |
| |
| write_reg(par, MIPI_DCS_SET_DISPLAY_ON); /* display ON */ |
| write_reg(par, MIPI_DCS_WRITE_MEMORY_START); /* Memory Write */ |
| |
| return 0; |
| } |
| |
| static void set_addr_win(struct fbtft_par *par, int xs, int ys, |
| int xe, int ye) |
| { |
| switch (par->info->var.rotate) { |
| case 0: |
| write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, |
| xs >> 8, xs & 0xff, xe >> 8, xe & 0xff); |
| write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, |
| (ys + __OFFSET) >> 8, (ys + __OFFSET) & 0xff, |
| (ye + __OFFSET) >> 8, (ye + __OFFSET) & 0xff); |
| break; |
| case 90: |
| write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, |
| (xs + __OFFSET) >> 8, (xs + __OFFSET) & 0xff, |
| (xe + __OFFSET) >> 8, (xe + __OFFSET) & 0xff); |
| write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, |
| ys >> 8, ys & 0xff, ye >> 8, ye & 0xff); |
| break; |
| case 180: |
| case 270: |
| write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, |
| xs >> 8, xs & 0xff, xe >> 8, xe & 0xff); |
| write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, |
| ys >> 8, ys & 0xff, ye >> 8, ye & 0xff); |
| break; |
| default: |
| /* Fix incorrect setting */ |
| par->info->var.rotate = 0; |
| } |
| write_reg(par, MIPI_DCS_WRITE_MEMORY_START); |
| } |
| |
| /* |
| * 7) MY: 1(bottom to top), 0(top to bottom) Row Address Order |
| * 6) MX: 1(R to L), 0(L to R) Column Address Order |
| * 5) MV: 1(Exchanged), 0(normal) Row/Column exchange |
| * 4) ML: 1(bottom to top), 0(top to bottom) Vertical Refresh Order |
| * 3) RGB: 1(BGR), 0(RGB) Color Space |
| * 2) MH: 1(R to L), 0(L to R) Horizontal Refresh Order |
| * 1) |
| * 0) |
| * |
| * MY, MX, MV, ML,RGB, MH, D1, D0 |
| * 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 //normal |
| * 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 //Y-Mirror |
| * 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 //X-Mirror |
| * 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 //X-Y-Mirror |
| * 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 //X-Y Exchange |
| * 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 //X-Y Exchange, Y-Mirror |
| * 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 //XY exchange |
| * 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 |
| */ |
| static int set_var(struct fbtft_par *par) |
| { |
| u8 mactrl_data = 0; /* Avoid compiler warning */ |
| |
| switch (par->info->var.rotate) { |
| case 0: |
| mactrl_data = 0x08; |
| break; |
| case 180: |
| mactrl_data = 0xC8; |
| break; |
| case 270: |
| mactrl_data = 0xA8; |
| break; |
| case 90: |
| mactrl_data = 0x68; |
| break; |
| } |
| |
| /* Colorspcae */ |
| if (par->bgr) |
| mactrl_data |= BIT(2); |
| write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, mactrl_data); |
| write_reg(par, MIPI_DCS_WRITE_MEMORY_START); |
| return 0; |
| } |
| |
| #ifdef GAMMA_ADJ |
| #define CURVE(num, idx) curves[(num) * par->gamma.num_values + (idx)] |
| static int gamma_adj(struct fbtft_par *par, u32 *curves) |
| { |
| static const unsigned long mask[] = { |
| 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, |
| 0x1f, 0x3f, 0x0f, 0x0f, 0x7f, 0x1f, |
| 0x3F, 0x3F, 0x3F, 0x3F, 0x3F}; |
| int i, j; |
| |
| for (i = 0; i < GAMMA_NUM; i++) |
| for (j = 0; j < GAMMA_LEN; j++) |
| CURVE(i, j) &= mask[i * par->gamma.num_values + j]; |
| |
| write_reg(par, CMD_PGAMMAC, |
| CURVE(0, 0), |
| CURVE(0, 1), |
| CURVE(0, 2), |
| CURVE(0, 3), |
| CURVE(0, 4), |
| CURVE(0, 5), |
| CURVE(0, 6), |
| (CURVE(0, 7) << 4) | CURVE(0, 8), |
| CURVE(0, 9), |
| CURVE(0, 10), |
| CURVE(0, 11), |
| CURVE(0, 12), |
| CURVE(0, 13), |
| CURVE(0, 14), |
| CURVE(0, 15)); |
| |
| /* Write Data to GRAM mode */ |
| write_reg(par, MIPI_DCS_WRITE_MEMORY_START); |
| |
| return 0; |
| } |
| |
| #undef CURVE |
| #endif |
| |
| static struct fbtft_display display = { |
| .regwidth = 8, |
| .width = WIDTH, |
| .height = HEIGHT, |
| .bpp = BPP, |
| .fps = FPS, |
| #ifdef GAMMA_ADJ |
| .gamma_num = GAMMA_NUM, |
| .gamma_len = GAMMA_LEN, |
| .gamma = DEFAULT_GAMMA, |
| #endif |
| .fbtftops = { |
| .init_display = init_display, |
| .set_addr_win = set_addr_win, |
| .set_var = set_var, |
| #ifdef GAMMA_ADJ |
| .set_gamma = gamma_adj, |
| #endif |
| }, |
| }; |
| |
| FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9163", &display); |
| |
| MODULE_ALIAS("spi:" DRVNAME); |
| MODULE_ALIAS("platform:" DRVNAME); |
| MODULE_ALIAS("spi:ili9163"); |
| MODULE_ALIAS("platform:ili9163"); |
| |
| MODULE_DESCRIPTION("FB driver for the ILI9163 LCD Controller"); |
| MODULE_AUTHOR("Kozhevnikov Anatoly"); |
| MODULE_LICENSE("GPL"); |