/* * Generic FB driver for TFT LCD displays * * Copyright (C) 2013 Noralf Tronnes * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include "fbtft.h" #define DRVNAME "flexfb" static char *chip; module_param(chip, charp, 0); MODULE_PARM_DESC(chip, "LCD controller"); static unsigned int width; module_param(width, uint, 0); MODULE_PARM_DESC(width, "Display width"); static unsigned int height; module_param(height, uint, 0); MODULE_PARM_DESC(height, "Display height"); static int init[512]; static int init_num; module_param_array(init, int, &init_num, 0); MODULE_PARM_DESC(init, "Init sequence"); static unsigned int setaddrwin; module_param(setaddrwin, uint, 0); MODULE_PARM_DESC(setaddrwin, "Which set_addr_win() implementation to use"); static unsigned int buswidth = 8; module_param(buswidth, uint, 0); MODULE_PARM_DESC(buswidth, "Width of databus (default: 8)"); static unsigned int regwidth = 8; module_param(regwidth, uint, 0); MODULE_PARM_DESC(regwidth, "Width of controller register (default: 8)"); static bool nobacklight; module_param(nobacklight, bool, 0); MODULE_PARM_DESC(nobacklight, "Turn off backlight functionality."); static bool latched; module_param(latched, bool, 0); MODULE_PARM_DESC(latched, "Use with latched 16-bit databus"); static int *initp; static int initp_num; /* default init sequences */ static int st7735r_init[] = { \ -1,0x01,-2,150,-1,0x11,-2,500,-1,0xB1,0x01,0x2C,0x2D,-1,0xB2,0x01,0x2C,0x2D,-1,0xB3,0x01,0x2C,0x2D,0x01,0x2C,0x2D, \ -1,0xB4,0x07,-1,0xC0,0xA2,0x02,0x84,-1,0xC1,0xC5,-1,0xC2,0x0A,0x00,-1,0xC3,0x8A,0x2A,-1,0xC4,0x8A,0xEE,-1,0xC5,0x0E, \ -1,0x20,-1,0x36,0xC0,-1,0x3A,0x05,-1,0xE0,0x0f,0x1a,0x0f,0x18,0x2f,0x28,0x20,0x22,0x1f,0x1b,0x23,0x37,0x00,0x07,0x02,0x10, \ -1,0xE1,0x0f,0x1b,0x0f,0x17,0x33,0x2c,0x29,0x2e,0x30,0x30,0x39,0x3f,0x00,0x07,0x03,0x10,-1,0x29,-2,100,-1,0x13,-2,10,-3 }; static int ssd1289_init[] = { \ -1,0x00,0x0001,-1,0x03,0xA8A4,-1,0x0C,0x0000,-1,0x0D,0x080C,-1,0x0E,0x2B00,-1,0x1E,0x00B7,-1,0x01,0x2B3F,-1,0x02,0x0600, \ -1,0x10,0x0000,-1,0x11,0x6070,-1,0x05,0x0000,-1,0x06,0x0000,-1,0x16,0xEF1C,-1,0x17,0x0003,-1,0x07,0x0233,-1,0x0B,0x0000, \ -1,0x0F,0x0000,-1,0x41,0x0000,-1,0x42,0x0000,-1,0x48,0x0000,-1,0x49,0x013F,-1,0x4A,0x0000,-1,0x4B,0x0000,-1,0x44,0xEF00, \ -1,0x45,0x0000,-1,0x46,0x013F,-1,0x30,0x0707,-1,0x31,0x0204,-1,0x32,0x0204,-1,0x33,0x0502,-1,0x34,0x0507,-1,0x35,0x0204, \ -1,0x36,0x0204,-1,0x37,0x0502,-1,0x3A,0x0302,-1,0x3B,0x0302,-1,0x23,0x0000,-1,0x24,0x0000,-1,0x25,0x8000,-1,0x4f,0x0000, \ -1,0x4e,0x0000,-1,0x22,-3 }; static int hx8340bn_init[] = { \ -1,0xC1,0xFF,0x83,0x40,-1,0x11,-2,150,-1,0xCA,0x70,0x00,0xD9,-1,0xB0,0x01,0x11, \ -1,0xC9,0x90,0x49,0x10,0x28,0x28,0x10,0x00,0x06,-2,20,-1,0xC2,0x60,0x71,0x01,0x0E,0x05,0x02,0x09,0x31,0x0A, \ -1,0xC3,0x67,0x30,0x61,0x17,0x48,0x07,0x05,0x33,-2,10,-1,0xB5,0x35,0x20,0x45,-1,0xB4,0x33,0x25,0x4C,-2,10, \ -1,0x3A,0x05,-1,0x29,-2,10,-3 }; static int ili9225_init[] = { \ -1,0x0001,0x011C,-1,0x0002,0x0100,-1,0x0003,0x1030,-1,0x0008,0x0808,-1,0x000C,0x0000,-1,0x000F,0x0A01,-1,0x0020,0x0000, \ -1,0x0021,0x0000,-2,50,-1,0x0010,0x0A00,-1,0x0011,0x1038,-2,50,-1,0x0012,0x1121,-1,0x0013,0x004E,-1,0x0014,0x676F, \ -1,0x0030,0x0000,-1,0x0031,0x00DB,-1,0x0032,0x0000,-1,0x0033,0x0000,-1,0x0034,0x00DB,-1,0x0035,0x0000,-1,0x0036,0x00AF, \ -1,0x0037,0x0000,-1,0x0038,0x00DB,-1,0x0039,0x0000,-1,0x0050,0x0000,-1,0x0051,0x060A,-1,0x0052,0x0D0A,-1,0x0053,0x0303, \ -1,0x0054,0x0A0D,-1,0x0055,0x0A06,-1,0x0056,0x0000,-1,0x0057,0x0303,-1,0x0058,0x0000,-1,0x0059,0x0000,-2,50, \ -1,0x0007,0x1017,-2,50,-3 }; static int ili9320_init[] = { \ -1,0x00E5,0x8000,-1,0x0000,0x0001,-1,0x0001,0x0100,-1,0x0002,0x0700,-1,0x0003,0x1030,-1,0x0004,0x0000,-1,0x0008,0x0202, \ -1,0x0009,0x0000,-1,0x000A,0x0000,-1,0x000C,0x0000,-1,0x000D,0x0000,-1,0x000F,0x0000,-1,0x0010,0x0000,-1,0x0011,0x0007, \ -1,0x0012,0x0000,-1,0x0013,0x0000,-2,200,-1,0x0010,0x17B0,-1,0x0011,0x0031,-2,50,-1,0x0012,0x0138,-2,50,-1,0x0013,0x1800, \ -1,0x0029,0x0008,-2,50,-1,0x0020,0x0000,-1,0x0021,0x0000,-1,0x0030,0x0000,-1,0x0031,0x0505,-1,0x0032,0x0004, \ -1,0x0035,0x0006,-1,0x0036,0x0707,-1,0x0037,0x0105,-1,0x0038,0x0002,-1,0x0039,0x0707,-1,0x003C,0x0704,-1,0x003D,0x0807, \ -1,0x0050,0x0000,-1,0x0051,0x00EF,-1,0x0052,0x0000,-1,0x0053,0x013F,-1,0x0060,0x2700,-1,0x0061,0x0001,-1,0x006A,0x0000, \ -1,0x0080,0x0000,-1,0x0081,0x0000,-1,0x0082,0x0000,-1,0x0083,0x0000,-1,0x0084,0x0000,-1,0x0085,0x0000,-1,0x0090,0x0010, \ -1,0x0092,0x0000,-1,0x0093,0x0003,-1,0x0095,0x0110,-1,0x0097,0x0000,-1,0x0098,0x0000,-1,0x0007,0x0173,-3 }; static int ili9325_init[] = { \ -1,0x00E3,0x3008,-1,0x00E7,0x0012,-1,0x00EF,0x1231,-1,0x0001,0x0100,-1,0x0002,0x0700,-1,0x0003,0x1030,-1,0x0004,0x0000, \ -1,0x0008,0x0207,-1,0x0009,0x0000,-1,0x000A,0x0000,-1,0x000C,0x0000,-1,0x000D,0x0000,-1,0x000F,0x0000,-1,0x0010,0x0000, \ -1,0x0011,0x0007,-1,0x0012,0x0000,-1,0x0013,0x0000,-2,200,-1,0x0010,0x1690,-1,0x0011,0x0223,-2,50,-1,0x0012,0x000D,-2,50, \ -1,0x0013,0x1200,-1,0x0029,0x000A,-1,0x002B,0x000C,-2,50,-1,0x0020,0x0000,-1,0x0021,0x0000,-1,0x0030,0x0000, \ -1,0x0031,0x0506,-1,0x0032,0x0104,-1,0x0035,0x0207,-1,0x0036,0x000F,-1,0x0037,0x0306,-1,0x0038,0x0102,-1,0x0039,0x0707, \ -1,0x003C,0x0702,-1,0x003D,0x1604,-1,0x0050,0x0000,-1,0x0051,0x00EF,-1,0x0052,0x0000,-1,0x0053,0x013F,-1,0x0060,0xA700, \ -1,0x0061,0x0001,-1,0x006A,0x0000,-1,0x0080,0x0000,-1,0x0081,0x0000,-1,0x0082,0x0000,-1,0x0083,0x0000,-1,0x0084,0x0000, \ -1,0x0085,0x0000,-1,0x0090,0x0010,-1,0x0092,0x0600,-1,0x0007,0x0133,-3 }; static int ili9341_init[] = { \ -1,0x28,-2,20,-1,0xCF,0x00,0x83,0x30,-1,0xED,0x64,0x03,0x12,0x81,-1,0xE8,0x85,0x01,0x79, \ -1,0xCB,0x39,0x2c,0x00,0x34,0x02,-1,0xF7,0x20,-1,0xEA,0x00,0x00,-1,0xC0,0x26,-1,0xC1,0x11, \ -1,0xC5,0x35,0x3E,-1,0xC7,0xBE,-1,0xB1,0x00,0x1B,-1,0xB6,0x0a,0x82,0x27,0x00,-1,0xB7,0x07, \ -1,0x3A,0x55,-1,0x36,0x48,-1,0x11,-2,120,-1,0x29,-2,20,-3 }; static int ssd1351_init[] = { -1,0xfd,0x12,-1,0xfd,0xb1,-1,0xae,-1,0xb3,0xf1,-1,0xca,0x7f,-1,0xa0,0x74, \ -1,0x15,0x00,0x7f,-1,0x75,0x00,0x7f,-1,0xa1,0x00,-1,0xa2,0x00,-1,0xb5,0x00, \ -1,0xab,0x01,-1,0xb1,0x32,-1,0xb4,0xa0,0xb5,0x55,-1,0xbb,0x17,-1,0xbe,0x05, \ -1,0xc1,0xc8,0x80,0xc8,-1,0xc7,0x0f,-1,0xb6,0x01,-1,0xa6,-1,0xaf,-3 }; /* ili9320, ili9325 */ static void flexfb_set_addr_win_1(struct fbtft_par *par, int xs, int ys, int xe, int ye) { fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); switch (par->info->var.rotate) { /* R20h = Horizontal GRAM Start Address */ /* R21h = Vertical GRAM Start Address */ case 0: write_reg(par, 0x0020, xs); write_reg(par, 0x0021, ys); break; case 180: write_reg(par, 0x0020, width - 1 - xs); write_reg(par, 0x0021, height - 1 - ys); break; case 270: write_reg(par, 0x0020, width - 1 - ys); write_reg(par, 0x0021, xs); break; case 90: write_reg(par, 0x0020, ys); write_reg(par, 0x0021, height - 1 - xs); break; } write_reg(par, 0x0022); /* Write Data to GRAM */ } /* ssd1289 */ static void flexfb_set_addr_win_2(struct fbtft_par *par, int xs, int ys, int xe, int ye) { fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); switch (par->info->var.rotate) { /* R4Eh - Set GDDRAM X address counter */ /* R4Fh - Set GDDRAM Y address counter */ case 0: write_reg(par, 0x4e, xs); write_reg(par, 0x4f, ys); break; case 180: write_reg(par, 0x4e, par->info->var.xres - 1 - xs); write_reg(par, 0x4f, par->info->var.yres - 1 - ys); break; case 270: write_reg(par, 0x4e, par->info->var.yres - 1 - ys); write_reg(par, 0x4f, xs); break; case 90: write_reg(par, 0x4e, ys); write_reg(par, 0x4f, par->info->var.xres - 1 - xs); break; } /* R22h - RAM data write */ write_reg(par, 0x22, 0); } /* ssd1351 */ static void set_addr_win_3(struct fbtft_par *par, int xs, int ys, int xe, int ye) { fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); write_reg(par, 0x15, xs, xe); write_reg(par, 0x75, ys, ye); write_reg(par, 0x5C); } static int flexfb_verify_gpios_dc(struct fbtft_par *par) { fbtft_par_dbg(DEBUG_VERIFY_GPIOS, par, "%s()\n", __func__); if (par->gpio.dc < 0) { dev_err(par->info->device, "Missing info about 'dc' gpio. Aborting.\n"); return -EINVAL; } return 0; } static int flexfb_verify_gpios_db(struct fbtft_par *par) { int i; int num_db = buswidth; fbtft_par_dbg(DEBUG_VERIFY_GPIOS, par, "%s()\n", __func__); if (par->gpio.dc < 0) { dev_err(par->info->device, "Missing info about 'dc' gpio. Aborting.\n"); return -EINVAL; } if (par->gpio.wr < 0) { dev_err(par->info->device, "Missing info about 'wr' gpio. Aborting.\n"); return -EINVAL; } if (latched && (par->gpio.latch < 0)) { dev_err(par->info->device, "Missing info about 'latch' gpio. Aborting.\n"); return -EINVAL; } if (latched) num_db=buswidth/2; for (i=0;i < num_db;i++) { if (par->gpio.db[i] < 0) { dev_err(par->info->device, "Missing info about 'db%02d' gpio. Aborting.\n", i); return -EINVAL; } } return 0; } static struct fbtft_display flex_display = { }; static int flexfb_probe_common(struct spi_device *sdev, struct platform_device *pdev) { struct device *dev; struct fb_info *info; struct fbtft_par *par; int ret; initp = init; initp_num = init_num; if (sdev) dev = &sdev->dev; else dev = &pdev->dev; fbtft_init_dbg(dev, "%s(%s)\n", __func__, sdev ? "'SPI device'" : "'Platform device'"); if (chip) { if (!strcmp(chip, "st7735r")) { if (!width) width = 128; if (!height) height = 160; if (init_num == 0) { initp = st7735r_init; initp_num = ARRAY_SIZE(st7735r_init); } } else if (!strcmp(chip, "hx8340bn")) { if (!width) width = 176; if (!height) height = 220; setaddrwin = 0; if (init_num == 0) { initp = hx8340bn_init; initp_num = ARRAY_SIZE(hx8340bn_init); } } else if (!strcmp(chip, "ili9225")) { if (!width) width = 176; if (!height) height = 220; setaddrwin = 0; regwidth = 16; if (init_num == 0) { initp = ili9225_init; initp_num = ARRAY_SIZE(ili9225_init); } } else if (!strcmp(chip, "ili9320")) { if (!width) width = 240; if (!height) height = 320; setaddrwin = 1; regwidth = 16; if (init_num == 0) { initp = ili9320_init; initp_num = ARRAY_SIZE(ili9320_init); } } else if (!strcmp(chip, "ili9325")) { if (!width) width = 240; if (!height) height = 320; setaddrwin = 1; regwidth = 16; if (init_num == 0) { initp = ili9325_init; initp_num = ARRAY_SIZE(ili9325_init); } } else if (!strcmp(chip, "ili9341")) { if (!width) width = 240; if (!height) height = 320; setaddrwin = 0; regwidth = 8; if (init_num == 0) { initp = ili9341_init; initp_num = ARRAY_SIZE(ili9341_init); } } else if (!strcmp(chip, "ssd1289")) { if (!width) width = 240; if (!height) height = 320; setaddrwin = 2; regwidth = 16; if (init_num == 0) { initp = ssd1289_init; initp_num = ARRAY_SIZE(ssd1289_init); } } else if (!strcmp(chip, "ssd1351")) { if (!width) width = 128; if (!height) height = 128; setaddrwin = 3; if (init_num == 0) { initp = ssd1351_init; initp_num = ARRAY_SIZE(ssd1351_init); } } else { dev_err(dev, "chip=%s is not supported\n", chip); return -EINVAL; } } if (width == 0 || height == 0) { dev_err(dev, "argument(s) missing: width and height has to be set.\n"); return -EINVAL; } flex_display.width = width; flex_display.height = height; fbtft_init_dbg(dev, "Display resolution: %dx%d\n", width, height); fbtft_init_dbg(dev, "chip = %s\n", chip ? chip : "not set"); fbtft_init_dbg(dev, "setaddrwin = %d\n", setaddrwin); fbtft_init_dbg(dev, "regwidth = %d\n", regwidth); fbtft_init_dbg(dev, "buswidth = %d\n", buswidth); info = fbtft_framebuffer_alloc(&flex_display, dev); if (!info) return -ENOMEM; par = info->par; if (sdev) par->spi = sdev; else par->pdev = pdev; if (!par->init_sequence) par->init_sequence = initp; par->fbtftops.init_display = fbtft_init_display; /* registerwrite functions */ switch (regwidth) { case 8: par->fbtftops.write_register = fbtft_write_reg8_bus8; break; case 16: par->fbtftops.write_register = fbtft_write_reg16_bus8; break; default: dev_err(dev, "argument 'regwidth': %d is not supported.\n", regwidth); return -EINVAL; } /* bus functions */ if (sdev) { par->fbtftops.write = fbtft_write_spi; switch (buswidth) { case 8: par->fbtftops.write_vmem = fbtft_write_vmem16_bus8; if (!par->startbyte) par->fbtftops.verify_gpios = flexfb_verify_gpios_dc; break; case 9: if (regwidth == 16) { dev_err(dev, "argument 'regwidth': %d is not supported with buswidth=%d and SPI.\n", regwidth, buswidth); return -EINVAL; } par->fbtftops.write_register = fbtft_write_reg8_bus9; par->fbtftops.write_vmem = fbtft_write_vmem16_bus9; sdev->bits_per_word = 9; ret = sdev->master->setup(sdev); if (ret) { dev_warn(dev, "9-bit SPI not available, emulating using 8-bit.\n"); sdev->bits_per_word = 8; ret = sdev->master->setup(sdev); if (ret) goto out_release; /* allocate buffer with room for dc bits */ par->extra = devm_kzalloc(par->info->device, par->txbuf.len + (par->txbuf.len / 8) + 8, GFP_KERNEL); if (!par->extra) { ret = -ENOMEM; goto out_release; } par->fbtftops.write = fbtft_write_spi_emulate_9; } break; default: dev_err(dev, "argument 'buswidth': %d is not supported with SPI.\n", buswidth); return -EINVAL; } } else { par->fbtftops.verify_gpios = flexfb_verify_gpios_db; switch (buswidth) { case 8: par->fbtftops.write = fbtft_write_gpio8_wr; par->fbtftops.write_vmem = fbtft_write_vmem16_bus8; break; case 16: par->fbtftops.write_register = fbtft_write_reg16_bus16; if (latched) par->fbtftops.write = fbtft_write_gpio16_wr_latched; else par->fbtftops.write = fbtft_write_gpio16_wr; par->fbtftops.write_vmem = fbtft_write_vmem16_bus16; break; default: dev_err(dev, "argument 'buswidth': %d is not supported with parallel.\n", buswidth); return -EINVAL; } } /* set_addr_win function */ switch (setaddrwin) { case 0: /* use default */ break; case 1: par->fbtftops.set_addr_win = flexfb_set_addr_win_1; break; case 2: par->fbtftops.set_addr_win = flexfb_set_addr_win_2; break; case 3: par->fbtftops.set_addr_win = set_addr_win_3; break; default: dev_err(dev, "argument 'setaddrwin': unknown value %d.\n", setaddrwin); return -EINVAL; } if (!nobacklight) par->fbtftops.register_backlight = fbtft_register_backlight; ret = fbtft_register_framebuffer(info); if (ret < 0) goto out_release; return 0; out_release: fbtft_framebuffer_release(info); return ret; } static int flexfb_remove_common(struct device *dev, struct fb_info *info) { struct fbtft_par *par; if (!info) return -EINVAL; par = info->par; if (par) fbtft_par_dbg(DEBUG_DRIVER_INIT_FUNCTIONS, par, "%s()\n", __func__); fbtft_unregister_framebuffer(info); fbtft_framebuffer_release(info); return 0; } static int flexfb_probe_spi(struct spi_device *spi) { return flexfb_probe_common(spi, NULL); } static int flexfb_remove_spi(struct spi_device *spi) { struct fb_info *info = spi_get_drvdata(spi); return flexfb_remove_common(&spi->dev, info); } static int flexfb_probe_pdev(struct platform_device *pdev) { return flexfb_probe_common(NULL, pdev); } static int flexfb_remove_pdev(struct platform_device *pdev) { struct fb_info *info = platform_get_drvdata(pdev); return flexfb_remove_common(&pdev->dev, info); } static struct spi_driver flexfb_spi_driver = { .driver = { .name = DRVNAME, .owner = THIS_MODULE, }, .probe = flexfb_probe_spi, .remove = flexfb_remove_spi, }; static const struct platform_device_id flexfb_platform_ids[] = { { "flexpfb", 0 }, { }, }; static struct platform_driver flexfb_platform_driver = { .driver = { .name = DRVNAME, }, .id_table = flexfb_platform_ids, .probe = flexfb_probe_pdev, .remove = flexfb_remove_pdev, }; static int __init flexfb_init(void) { int ret, ret2; ret = spi_register_driver(&flexfb_spi_driver); ret2 = platform_driver_register(&flexfb_platform_driver); if (ret < 0) return ret; return ret2; } static void __exit flexfb_exit(void) { spi_unregister_driver(&flexfb_spi_driver); platform_driver_unregister(&flexfb_platform_driver); } /* ------------------------------------------------------------------------- */ module_init(flexfb_init); module_exit(flexfb_exit); MODULE_DESCRIPTION("Generic FB driver for TFT LCD displays"); MODULE_AUTHOR("Noralf Tronnes"); MODULE_LICENSE("GPL");