3 * Copyright (C) 2013, Noralf Tronnes
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #define pr_fmt(fmt) "fbtft_device: " fmt
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/gpio.h>
21 #include <linux/spi/spi.h>
22 #include <video/mipi_display.h>
28 static struct spi_device *spi_device;
29 static struct platform_device *p_device;
32 module_param(name, charp, 0);
33 MODULE_PARM_DESC(name, "Devicename (required). name=list => list all supported devices.");
35 static unsigned rotate;
36 module_param(rotate, uint, 0);
37 MODULE_PARM_DESC(rotate,
38 "Angle to rotate display counter clockwise: 0, 90, 180, 270");
40 static unsigned busnum;
41 module_param(busnum, uint, 0);
42 MODULE_PARM_DESC(busnum, "SPI bus number (default=0)");
45 module_param(cs, uint, 0);
46 MODULE_PARM_DESC(cs, "SPI chip select (default=0)");
48 static unsigned speed;
49 module_param(speed, uint, 0);
50 MODULE_PARM_DESC(speed, "SPI speed (override device default)");
53 module_param(mode, int, 0);
54 MODULE_PARM_DESC(mode, "SPI mode (override device default)");
57 module_param(gpios, charp, 0);
58 MODULE_PARM_DESC(gpios,
59 "List of gpios. Comma separated with the form: reset:23,dc:24 (when overriding the default, all gpios must be specified)");
62 module_param(fps, uint, 0);
63 MODULE_PARM_DESC(fps, "Frames per second (override driver default)");
66 module_param(gamma, charp, 0);
67 MODULE_PARM_DESC(gamma,
68 "String representation of Gamma Curve(s). Driver specific.");
71 module_param(txbuflen, int, 0);
72 MODULE_PARM_DESC(txbuflen, "txbuflen (override driver default)");
75 module_param(bgr, int, 0);
77 "BGR bit (supported by some drivers).");
79 static unsigned startbyte;
80 module_param(startbyte, uint, 0);
81 MODULE_PARM_DESC(startbyte, "Sets the Start byte used by some SPI displays.");
84 module_param(custom, bool, 0);
85 MODULE_PARM_DESC(custom, "Add a custom display device. Use speed= argument to make it a SPI device, else platform_device");
87 static unsigned width;
88 module_param(width, uint, 0);
89 MODULE_PARM_DESC(width, "Display width, used with the custom argument");
91 static unsigned height;
92 module_param(height, uint, 0);
93 MODULE_PARM_DESC(height, "Display height, used with the custom argument");
95 static unsigned buswidth = 8;
96 module_param(buswidth, uint, 0);
97 MODULE_PARM_DESC(buswidth, "Display bus width, used with the custom argument");
99 static int init[FBTFT_MAX_INIT_SEQUENCE];
101 module_param_array(init, int, &init_num, 0);
102 MODULE_PARM_DESC(init, "Init sequence, used with the custom argument");
104 static unsigned long debug;
105 module_param(debug, ulong, 0);
106 MODULE_PARM_DESC(debug,
107 "level: 0-7 (the remaining 29 bits is for advanced usage)");
109 static unsigned verbose = 3;
110 module_param(verbose, uint, 0);
111 MODULE_PARM_DESC(verbose,
112 "0 silent, >0 show gpios, >1 show devices, >2 show devices before (default=3)");
114 struct fbtft_device_display {
116 struct spi_board_info *spi;
117 struct platform_device *pdev;
120 static void fbtft_device_pdev_release(struct device *dev);
122 static int write_gpio16_wr_slow(struct fbtft_par *par, void *buf, size_t len);
123 static void adafruit18_green_tab_set_addr_win(struct fbtft_par *par,
124 int xs, int ys, int xe, int ye);
126 #define ADAFRUIT18_GAMMA \
127 "02 1c 07 12 37 32 29 2d 29 25 2B 39 00 01 03 10\n" \
128 "03 1d 07 06 2E 2C 29 2D 2E 2E 37 3F 00 00 02 10"
130 #define CBERRY28_GAMMA \
131 "D0 00 14 15 13 2C 42 43 4E 09 16 14 18 21\n" \
132 "D0 00 14 15 13 0B 43 55 53 0C 17 14 23 20"
134 static int cberry28_init_sequence[] = {
135 /* turn off sleep mode */
136 -1, MIPI_DCS_EXIT_SLEEP_MODE,
139 /* set pixel format to RGB-565 */
140 -1, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT,
142 -1, 0xB2, 0x0C, 0x0C, 0x00, 0x33, 0x33,
151 * VDV and VRH register values come from command write
154 -1, 0xC2, 0x01, 0xFF,
157 * VAP = 4.7V + (VCOM + VCOM offset + 0.5 * VDV)
158 * VAN = -4.7V + (VCOM + VCOM offset + 0.5 * VDV)
168 /* VCOM offset = 0V */
176 -1, 0xD0, 0xA4, 0xA1,
178 -1, MIPI_DCS_SET_DISPLAY_ON,
183 static int hy28b_init_sequence[] = {
184 -1, 0x00e7, 0x0010, -1, 0x0000, 0x0001,
185 -1, 0x0001, 0x0100, -1, 0x0002, 0x0700,
186 -1, 0x0003, 0x1030, -1, 0x0004, 0x0000,
187 -1, 0x0008, 0x0207, -1, 0x0009, 0x0000,
188 -1, 0x000a, 0x0000, -1, 0x000c, 0x0001,
189 -1, 0x000d, 0x0000, -1, 0x000f, 0x0000,
190 -1, 0x0010, 0x0000, -1, 0x0011, 0x0007,
191 -1, 0x0012, 0x0000, -1, 0x0013, 0x0000,
192 -2, 50, -1, 0x0010, 0x1590, -1, 0x0011,
193 0x0227, -2, 50, -1, 0x0012, 0x009c, -2, 50,
194 -1, 0x0013, 0x1900, -1, 0x0029, 0x0023,
195 -1, 0x002b, 0x000e, -2, 50,
196 -1, 0x0020, 0x0000, -1, 0x0021, 0x0000,
197 -2, 50, -1, 0x0050, 0x0000,
198 -1, 0x0051, 0x00ef, -1, 0x0052, 0x0000,
199 -1, 0x0053, 0x013f, -1, 0x0060, 0xa700,
200 -1, 0x0061, 0x0001, -1, 0x006a, 0x0000,
201 -1, 0x0080, 0x0000, -1, 0x0081, 0x0000,
202 -1, 0x0082, 0x0000, -1, 0x0083, 0x0000,
203 -1, 0x0084, 0x0000, -1, 0x0085, 0x0000,
204 -1, 0x0090, 0x0010, -1, 0x0092, 0x0000,
205 -1, 0x0093, 0x0003, -1, 0x0095, 0x0110,
206 -1, 0x0097, 0x0000, -1, 0x0098, 0x0000,
207 -1, 0x0007, 0x0133, -1, 0x0020, 0x0000,
208 -1, 0x0021, 0x0000, -2, 100, -3 };
210 #define HY28B_GAMMA \
211 "04 1F 4 7 7 0 7 7 6 0\n" \
212 "0F 00 1 7 4 0 0 0 6 7"
214 static int pitft_init_sequence[] = {
215 -1, 0x01, -2, 5, -1, 0x28, -1, 0xEF,
216 0x03, 0x80, 0x02, -1, 0xCF, 0x00, 0xC1, 0x30,
217 -1, 0xED, 0x64, 0x03, 0x12, 0x81,
218 -1, 0xE8, 0x85, 0x00, 0x78,
219 -1, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
220 -1, 0xF7, 0x20, -1, 0xEA, 0x00, 0x00,
221 -1, 0xC0, 0x23, -1, 0xC1, 0x10, -1, 0xC5,
222 0x3e, 0x28, -1, 0xC7, 0x86, -1, 0x3A, 0x55,
223 -1, 0xB1, 0x00, 0x18, -1, 0xB6, 0x08, 0x82,
224 0x27, -1, 0xF2, 0x00, -1, 0x26, 0x01,
225 -1, 0xE0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08,
226 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03,
227 0x0E, 0x09, 0x00, -1, 0xE1, 0x00, 0x0E, 0x14,
228 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48,
229 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, -1,
230 0x11, -2, 100, -1, 0x29, -2, 20, -3 };
232 static int waveshare32b_init_sequence[] = {
233 -1, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
234 -1, 0xCF, 0x00, 0xC1, 0x30,
235 -1, 0xE8, 0x85, 0x00, 0x78, -1, 0xEA, 0x00,
236 0x00, -1, 0xED, 0x64, 0x03, 0x12, 0x81,
237 -1, 0xF7, 0x20, -1, 0xC0, 0x23, -1, 0xC1,
238 0x10, -1, 0xC5, 0x3e, 0x28, -1, 0xC7, 0x86,
239 -1, 0x36, 0x28, -1, 0x3A, 0x55, -1, 0xB1, 0x00,
240 0x18, -1, 0xB6, 0x08, 0x82, 0x27,
241 -1, 0xF2, 0x00, -1, 0x26, 0x01,
242 -1, 0xE0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E,
243 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
244 -1, 0xE1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31,
245 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
246 -1, 0x11, -2, 120, -1, 0x29, -1, 0x2c, -3 };
248 /* Supported displays in alphabetical order */
249 static struct fbtft_device_display displays[] = {
251 .name = "adafruit18",
252 .spi = &(struct spi_board_info) {
253 .modalias = "fb_st7735r",
254 .max_speed_hz = 32000000,
256 .platform_data = &(struct fbtft_platform_data) {
261 .gpios = (const struct fbtft_gpio []) {
267 .gamma = ADAFRUIT18_GAMMA,
271 .name = "adafruit18_green",
272 .spi = &(struct spi_board_info) {
273 .modalias = "fb_st7735r",
274 .max_speed_hz = 4000000,
276 .platform_data = &(struct fbtft_platform_data) {
280 .fbtftops.set_addr_win =
281 adafruit18_green_tab_set_addr_win,
284 .gpios = (const struct fbtft_gpio []) {
290 .gamma = ADAFRUIT18_GAMMA,
294 .name = "adafruit22",
295 .spi = &(struct spi_board_info) {
296 .modalias = "fb_hx8340bn",
297 .max_speed_hz = 32000000,
299 .platform_data = &(struct fbtft_platform_data) {
305 .gpios = (const struct fbtft_gpio []) {
313 .name = "adafruit22a",
314 .spi = &(struct spi_board_info) {
315 .modalias = "fb_ili9340",
316 .max_speed_hz = 32000000,
318 .platform_data = &(struct fbtft_platform_data) {
324 .gpios = (const struct fbtft_gpio []) {
333 .name = "adafruit28",
334 .spi = &(struct spi_board_info) {
335 .modalias = "fb_ili9341",
336 .max_speed_hz = 32000000,
338 .platform_data = &(struct fbtft_platform_data) {
344 .gpios = (const struct fbtft_gpio []) {
353 .name = "adafruit13m",
354 .spi = &(struct spi_board_info) {
355 .modalias = "fb_ssd1306",
356 .max_speed_hz = 16000000,
358 .platform_data = &(struct fbtft_platform_data) {
362 .gpios = (const struct fbtft_gpio []) {
370 .name = "admatec_c-berry28",
371 .spi = &(struct spi_board_info) {
372 .modalias = "fb_st7789v",
373 .max_speed_hz = 48000000,
375 .platform_data = &(struct fbtft_platform_data) {
379 .init_sequence = cberry28_init_sequence,
381 .gpios = (const struct fbtft_gpio []) {
387 .gamma = CBERRY28_GAMMA,
391 .name = "agm1264k-fl",
392 .pdev = &(struct platform_device) {
393 .name = "fb_agm1264k-fl",
396 .release = fbtft_device_pdev_release,
397 .platform_data = &(struct fbtft_platform_data) {
400 .backlight = FBTFT_ONBOARD_BACKLIGHT,
402 .gpios = (const struct fbtft_gpio []) {
410 .spi = &(struct spi_board_info) {
411 .modalias = "fb_uc1701",
412 .max_speed_hz = 8000000,
414 .platform_data = &(struct fbtft_platform_data) {
419 .gpios = (const struct fbtft_gpio []) {
427 .name = "er_tftm050_2",
428 .spi = &(struct spi_board_info) {
429 .modalias = "fb_ra8875",
430 .max_speed_hz = 5000000,
432 .platform_data = &(struct fbtft_platform_data) {
440 .gpios = (const struct fbtft_gpio []) {
448 .name = "er_tftm070_5",
449 .spi = &(struct spi_board_info) {
450 .modalias = "fb_ra8875",
451 .max_speed_hz = 5000000,
453 .platform_data = &(struct fbtft_platform_data) {
461 .gpios = (const struct fbtft_gpio []) {
470 .spi = &(struct spi_board_info) {
471 .modalias = "fb_uc1611",
472 .max_speed_hz = 32000000,
474 .platform_data = &(struct fbtft_platform_data) {
478 .gpios = (const struct fbtft_gpio []) {
485 .name = "ew24ha0_9bit",
486 .spi = &(struct spi_board_info) {
487 .modalias = "fb_uc1611",
488 .max_speed_hz = 32000000,
490 .platform_data = &(struct fbtft_platform_data) {
494 .gpios = (const struct fbtft_gpio []) {
501 .spi = &(struct spi_board_info) {
502 .modalias = "flexfb",
503 .max_speed_hz = 32000000,
505 .platform_data = &(struct fbtft_platform_data) {
506 .gpios = (const struct fbtft_gpio []) {
515 .pdev = &(struct platform_device) {
519 .release = fbtft_device_pdev_release,
520 .platform_data = &(struct fbtft_platform_data) {
521 .gpios = (const struct fbtft_gpio []) {
541 .name = "freetronicsoled128",
542 .spi = &(struct spi_board_info) {
543 .modalias = "fb_ssd1351",
544 .max_speed_hz = 20000000,
546 .platform_data = &(struct fbtft_platform_data) {
549 .backlight = FBTFT_ONBOARD_BACKLIGHT,
552 .gpios = (const struct fbtft_gpio []) {
561 .spi = &(struct spi_board_info) {
562 .modalias = "fb_hx8353d",
563 .max_speed_hz = 16000000,
565 .platform_data = &(struct fbtft_platform_data) {
570 .gpios = (const struct fbtft_gpio []) {
580 .spi = &(struct spi_board_info) {
581 .modalias = "fb_ili9320",
582 .max_speed_hz = 32000000,
584 .platform_data = &(struct fbtft_platform_data) {
591 .gpios = (const struct fbtft_gpio []) {
600 .spi = &(struct spi_board_info) {
601 .modalias = "fb_ili9325",
602 .max_speed_hz = 48000000,
604 .platform_data = &(struct fbtft_platform_data) {
608 .init_sequence = hy28b_init_sequence,
613 .gpios = (const struct fbtft_gpio []) {
618 .gamma = HY28B_GAMMA,
623 .spi = &(struct spi_board_info) {
624 .modalias = "fb_ili9481",
625 .max_speed_hz = 32000000,
627 .platform_data = &(struct fbtft_platform_data) {
634 .gpios = (const struct fbtft_gpio []) {
644 .pdev = &(struct platform_device) {
645 .name = "fb_s6d1121",
648 .release = fbtft_device_pdev_release,
649 .platform_data = &(struct fbtft_platform_data) {
655 .gpios = (const struct fbtft_gpio []) {
656 /* Wiring for LCD adapter kit */
658 { "dc", 0 }, /* rev 2: 2 */
659 { "wr", 1 }, /* rev 2: 3 */
663 { "db02", 21 }, /* rev 2: 27 */
676 .pdev = &(struct platform_device) {
677 .name = "fb_ili9325",
680 .release = fbtft_device_pdev_release,
681 .platform_data = &(struct fbtft_platform_data) {
687 .gpios = (const struct fbtft_gpio []) {
694 .name = "itdb28_spi",
695 .spi = &(struct spi_board_info) {
696 .modalias = "fb_ili9325",
697 .max_speed_hz = 32000000,
699 .platform_data = &(struct fbtft_platform_data) {
705 .gpios = (const struct fbtft_gpio []) {
713 .name = "mi0283qt-2",
714 .spi = &(struct spi_board_info) {
715 .modalias = "fb_hx8347d",
716 .max_speed_hz = 32000000,
718 .platform_data = &(struct fbtft_platform_data) {
725 .gpios = (const struct fbtft_gpio []) {
734 .name = "mi0283qt-9a",
735 .spi = &(struct spi_board_info) {
736 .modalias = "fb_ili9341",
737 .max_speed_hz = 32000000,
739 .platform_data = &(struct fbtft_platform_data) {
745 .gpios = (const struct fbtft_gpio []) {
753 .name = "mi0283qt-v2",
754 .spi = &(struct spi_board_info) {
755 .modalias = "fb_watterott",
756 .max_speed_hz = 4000000,
758 .platform_data = &(struct fbtft_platform_data) {
759 .gpios = (const struct fbtft_gpio []) {
767 .spi = &(struct spi_board_info) {
768 .modalias = "fb_pcd8544",
769 .max_speed_hz = 400000,
771 .platform_data = &(struct fbtft_platform_data) {
775 .gpios = (const struct fbtft_gpio []) {
784 .name = "nokia3310a",
785 .spi = &(struct spi_board_info) {
786 .modalias = "fb_tls8204",
787 .max_speed_hz = 1000000,
789 .platform_data = &(struct fbtft_platform_data) {
793 .gpios = (const struct fbtft_gpio []) {
803 .spi = &(struct spi_board_info) {
804 .modalias = "fb_ili9163",
805 .max_speed_hz = 12000000,
807 .platform_data = &(struct fbtft_platform_data) {
813 .gpios = (const struct fbtft_gpio []) {
821 .spi = &(struct spi_board_info) {
822 .modalias = "fb_ili9486",
823 .max_speed_hz = 32000000,
825 .platform_data = &(struct fbtft_platform_data) {
832 .gpios = (const struct fbtft_gpio []) {
842 .spi = &(struct spi_board_info) {
843 .modalias = "fb_ili9340",
844 .max_speed_hz = 32000000,
847 .platform_data = &(struct fbtft_platform_data) {
851 .init_sequence = pitft_init_sequence,
854 .gpios = (const struct fbtft_gpio []) {
862 .spi = &(struct spi_board_info) {
863 .modalias = "fb_ssd1351",
864 .max_speed_hz = 20000000,
866 .platform_data = &(struct fbtft_platform_data) {
871 .gpios = (const struct fbtft_gpio []) {
876 .gamma = "0 2 2 2 2 2 2 2 "
887 .name = "rpi-display",
888 .spi = &(struct spi_board_info) {
889 .modalias = "fb_ili9341",
890 .max_speed_hz = 32000000,
892 .platform_data = &(struct fbtft_platform_data) {
898 .gpios = (const struct fbtft_gpio []) {
908 .spi = &(struct spi_board_info) {
909 .modalias = "fb_s6d02a1",
910 .max_speed_hz = 32000000,
912 .platform_data = &(struct fbtft_platform_data) {
918 .gpios = (const struct fbtft_gpio []) {
927 .name = "sainsmart18",
928 .spi = &(struct spi_board_info) {
929 .modalias = "fb_st7735r",
930 .max_speed_hz = 32000000,
932 .platform_data = &(struct fbtft_platform_data) {
936 .gpios = (const struct fbtft_gpio []) {
944 .name = "sainsmart32",
945 .pdev = &(struct platform_device) {
946 .name = "fb_ssd1289",
949 .release = fbtft_device_pdev_release,
950 .platform_data = &(struct fbtft_platform_data) {
953 .txbuflen = -2, /* disable buffer */
955 .fbtftops.write = write_gpio16_wr_slow,
958 .gpios = (const struct fbtft_gpio []) {
965 .name = "sainsmart32_fast",
966 .pdev = &(struct platform_device) {
967 .name = "fb_ssd1289",
970 .release = fbtft_device_pdev_release,
971 .platform_data = &(struct fbtft_platform_data) {
974 .txbuflen = -2, /* disable buffer */
978 .gpios = (const struct fbtft_gpio []) {
985 .name = "sainsmart32_latched",
986 .pdev = &(struct platform_device) {
987 .name = "fb_ssd1289",
990 .release = fbtft_device_pdev_release,
991 .platform_data = &(struct fbtft_platform_data) {
994 .txbuflen = -2, /* disable buffer */
997 fbtft_write_gpio16_wr_latched,
1000 .gpios = (const struct fbtft_gpio []) {
1007 .name = "sainsmart32_spi",
1008 .spi = &(struct spi_board_info) {
1009 .modalias = "fb_ssd1289",
1010 .max_speed_hz = 16000000,
1012 .platform_data = &(struct fbtft_platform_data) {
1018 .gpios = (const struct fbtft_gpio []) {
1027 .spi = &(struct spi_board_info) {
1028 .modalias = "spidev",
1029 .max_speed_hz = 500000,
1033 .platform_data = &(struct fbtft_platform_data) {
1034 .gpios = (const struct fbtft_gpio []) {
1041 .spi = &(struct spi_board_info) {
1042 .modalias = "fb_ssd1331",
1043 .max_speed_hz = 20000000,
1045 .platform_data = &(struct fbtft_platform_data) {
1049 .gpios = (const struct fbtft_gpio []) {
1057 .name = "tinylcd35",
1058 .spi = &(struct spi_board_info) {
1059 .modalias = "fb_tinylcd",
1060 .max_speed_hz = 32000000,
1062 .platform_data = &(struct fbtft_platform_data) {
1068 .gpios = (const struct fbtft_gpio []) {
1077 .name = "tm022hdh26",
1078 .spi = &(struct spi_board_info) {
1079 .modalias = "fb_ili9341",
1080 .max_speed_hz = 32000000,
1082 .platform_data = &(struct fbtft_platform_data) {
1088 .gpios = (const struct fbtft_gpio []) {
1097 .name = "tontec35_9481", /* boards before 02 July 2014 */
1098 .spi = &(struct spi_board_info) {
1099 .modalias = "fb_ili9481",
1100 .max_speed_hz = 128000000,
1102 .platform_data = &(struct fbtft_platform_data) {
1108 .gpios = (const struct fbtft_gpio []) {
1117 .name = "tontec35_9486", /* boards after 02 July 2014 */
1118 .spi = &(struct spi_board_info) {
1119 .modalias = "fb_ili9486",
1120 .max_speed_hz = 128000000,
1122 .platform_data = &(struct fbtft_platform_data) {
1128 .gpios = (const struct fbtft_gpio []) {
1137 .name = "upd161704",
1138 .spi = &(struct spi_board_info) {
1139 .modalias = "fb_upd161704",
1140 .max_speed_hz = 32000000,
1142 .platform_data = &(struct fbtft_platform_data) {
1146 .gpios = (const struct fbtft_gpio []) {
1154 .name = "waveshare32b",
1155 .spi = &(struct spi_board_info) {
1156 .modalias = "fb_ili9340",
1157 .max_speed_hz = 48000000,
1159 .platform_data = &(struct fbtft_platform_data) {
1164 waveshare32b_init_sequence,
1167 .gpios = (const struct fbtft_gpio []) {
1175 .name = "waveshare22",
1176 .spi = &(struct spi_board_info) {
1177 .modalias = "fb_bd663474",
1178 .max_speed_hz = 32000000,
1180 .platform_data = &(struct fbtft_platform_data) {
1184 .gpios = (const struct fbtft_gpio []) {
1192 /* This should be the last item.
1193 Used with the custom argument */
1195 .spi = &(struct spi_board_info) {
1199 .platform_data = &(struct fbtft_platform_data) {
1200 .gpios = (const struct fbtft_gpio []) {
1205 .pdev = &(struct platform_device) {
1209 .release = fbtft_device_pdev_release,
1210 .platform_data = &(struct fbtft_platform_data) {
1211 .gpios = (const struct fbtft_gpio []) {
1220 static int write_gpio16_wr_slow(struct fbtft_par *par, void *buf, size_t len)
1224 #ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
1225 static u16 prev_data;
1228 fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
1229 "%s(len=%d): ", __func__, len);
1232 data = *(u16 *) buf;
1234 /* Start writing by pulling down /WR */
1235 gpio_set_value(par->gpio.wr, 0);
1238 #ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
1239 if (data == prev_data) {
1240 gpio_set_value(par->gpio.wr, 0); /* used as delay */
1242 for (i = 0; i < 16; i++) {
1243 if ((data & 1) != (prev_data & 1))
1244 gpio_set_value(par->gpio.db[i],
1251 for (i = 0; i < 16; i++) {
1252 gpio_set_value(par->gpio.db[i], data & 1);
1258 gpio_set_value(par->gpio.wr, 1);
1260 #ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
1261 prev_data = *(u16 *) buf;
1270 static void adafruit18_green_tab_set_addr_win(struct fbtft_par *par,
1271 int xs, int ys, int xe, int ye)
1273 write_reg(par, 0x2A, 0, xs + 2, 0, xe + 2);
1274 write_reg(par, 0x2B, 0, ys + 1, 0, ye + 1);
1275 write_reg(par, 0x2C);
1278 /* used if gpios parameter is present */
1279 static struct fbtft_gpio fbtft_device_param_gpios[MAX_GPIOS + 1] = { };
1281 static void fbtft_device_pdev_release(struct device *dev)
1283 /* Needed to silence this message:
1284 Device 'xxx' does not have a release() function, it is broken and must be fixed
1288 static int spi_device_found(struct device *dev, void *data)
1290 struct spi_device *spi = container_of(dev, struct spi_device, dev);
1292 dev_info(dev, "%s %s %dkHz %d bits mode=0x%02X\n", spi->modalias,
1293 dev_name(dev), spi->max_speed_hz / 1000, spi->bits_per_word,
1299 static void pr_spi_devices(void)
1301 pr_debug("SPI devices registered:\n");
1302 bus_for_each_dev(&spi_bus_type, NULL, NULL, spi_device_found);
1305 static int p_device_found(struct device *dev, void *data)
1307 struct platform_device
1308 *pdev = container_of(dev, struct platform_device, dev);
1310 if (strstr(pdev->name, "fb"))
1311 dev_info(dev, "%s id=%d pdata? %s\n", pdev->name, pdev->id,
1312 pdev->dev.platform_data ? "yes" : "no");
1317 static void pr_p_devices(void)
1319 pr_debug("'fb' Platform devices registered:\n");
1320 bus_for_each_dev(&platform_bus_type, NULL, NULL, p_device_found);
1324 static void fbtft_device_spi_delete(struct spi_master *master, unsigned cs)
1329 snprintf(str, sizeof(str), "%s.%u", dev_name(&master->dev), cs);
1331 dev = bus_find_device_by_name(&spi_bus_type, NULL, str);
1334 dev_info(dev, "Deleting %s\n", str);
1339 static int fbtft_device_spi_device_register(struct spi_board_info *spi)
1341 struct spi_master *master;
1343 master = spi_busnum_to_master(spi->bus_num);
1345 pr_err("spi_busnum_to_master(%d) returned NULL\n",
1349 /* make sure it's available */
1350 fbtft_device_spi_delete(master, spi->chip_select);
1351 spi_device = spi_new_device(master, spi);
1352 put_device(&master->dev);
1354 dev_err(&master->dev, "spi_new_device() returned NULL\n");
1360 static int fbtft_device_spi_device_register(struct spi_board_info *spi)
1362 return spi_register_board_info(spi, 1);
1366 static int __init fbtft_device_init(void)
1368 struct spi_board_info *spi = NULL;
1369 struct fbtft_platform_data *pdata;
1370 const struct fbtft_gpio *gpio = NULL;
1371 char *p_gpio, *p_name, *p_num;
1379 pr_err("missing module parameter: 'name'\n");
1386 if (init_num > FBTFT_MAX_INIT_SEQUENCE) {
1387 pr_err("init parameter: exceeded max array size: %d\n",
1388 FBTFT_MAX_INIT_SEQUENCE);
1392 /* parse module parameter: gpios */
1393 while ((p_gpio = strsep(&gpios, ","))) {
1394 if (strchr(p_gpio, ':') == NULL) {
1395 pr_err("error: missing ':' in gpios parameter: %s\n",
1400 p_name = strsep(&p_num, ":");
1401 if (p_name == NULL || p_num == NULL) {
1402 pr_err("something bad happened parsing gpios parameter: %s\n",
1406 ret = kstrtol(p_num, 10, &val);
1408 pr_err("could not parse number in gpios parameter: %s:%s\n",
1412 strncpy(fbtft_device_param_gpios[i].name, p_name,
1413 FBTFT_GPIO_NAME_SIZE - 1);
1414 fbtft_device_param_gpios[i++].gpio = (int) val;
1415 if (i == MAX_GPIOS) {
1416 pr_err("gpios parameter: exceeded max array size: %d\n",
1421 if (fbtft_device_param_gpios[0].name[0])
1422 gpio = fbtft_device_param_gpios;
1425 pr_spi_devices(); /* print list of registered SPI devices */
1428 pr_p_devices(); /* print list of 'fb' platform devices */
1430 pr_debug("name='%s', busnum=%d, cs=%d\n", name, busnum, cs);
1432 if (rotate > 0 && rotate < 4) {
1433 rotate = (4 - rotate) * 90;
1434 pr_warn("argument 'rotate' should be an angle. Values 1-3 is deprecated. Setting it to %d.\n",
1437 if (rotate != 0 && rotate != 90 && rotate != 180 && rotate != 270) {
1438 pr_warn("argument 'rotate' illegal value: %d. Setting it to 0.\n",
1443 /* name=list lists all supported displays */
1444 if (strncmp(name, "list", FBTFT_GPIO_NAME_SIZE) == 0) {
1445 pr_info("Supported displays:\n");
1447 for (i = 0; i < ARRAY_SIZE(displays); i++)
1448 pr_info("%s\n", displays[i].name);
1453 i = ARRAY_SIZE(displays) - 1;
1454 displays[i].name = name;
1456 displays[i].pdev->name = name;
1457 displays[i].spi = NULL;
1459 strncpy(displays[i].spi->modalias, name, SPI_NAME_SIZE);
1460 displays[i].pdev = NULL;
1464 for (i = 0; i < ARRAY_SIZE(displays); i++) {
1465 if (strncmp(name, displays[i].name, 32) == 0) {
1466 if (displays[i].spi) {
1467 spi = displays[i].spi;
1468 spi->chip_select = cs;
1469 spi->bus_num = busnum;
1471 spi->max_speed_hz = speed;
1474 pdata = (void *)spi->platform_data;
1475 } else if (displays[i].pdev) {
1476 p_device = displays[i].pdev;
1477 pdata = p_device->dev.platform_data;
1479 pr_err("broken displays array\n");
1483 pdata->rotate = rotate;
1489 pdata->startbyte = startbyte;
1491 pdata->gamma = gamma;
1492 pdata->display.debug = debug;
1496 pdata->txbuflen = txbuflen;
1498 pdata->display.init_sequence = init;
1500 pdata->gpios = gpio;
1502 pdata->display.width = width;
1503 pdata->display.height = height;
1504 pdata->display.buswidth = buswidth;
1505 pdata->display.backlight = 1;
1508 if (displays[i].spi) {
1509 ret = fbtft_device_spi_device_register(spi);
1511 pr_err("failed to register SPI device\n");
1515 ret = platform_device_register(p_device);
1517 pr_err("platform_device_register() returned %d\n",
1528 pr_err("display not supported: '%s'\n", name);
1532 if (verbose && pdata && pdata->gpios) {
1533 gpio = pdata->gpios;
1534 pr_info("GPIOS used by '%s':\n", name);
1536 while (verbose && gpio->name[0]) {
1537 pr_info("'%s' = GPIO%d\n", gpio->name, gpio->gpio);
1542 pr_info("(none)\n");
1545 if (spi_device && (verbose > 1))
1547 if (p_device && (verbose > 1))
1553 static void __exit fbtft_device_exit(void)
1556 device_del(&spi_device->dev);
1561 platform_device_unregister(p_device);
1565 arch_initcall(fbtft_device_init);
1566 module_exit(fbtft_device_exit);
1568 MODULE_DESCRIPTION("Add a FBTFT device.");
1569 MODULE_AUTHOR("Noralf Tronnes");
1570 MODULE_LICENSE("GPL");