[PATCH 28/29] staging: fbtft: add fbtft_device driver
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Wed Dec 31 09:11:36 UTC 2014
This commit adds the fbtft_device driver from the fbtft project at
https://github.com/notro/fbtft.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
drivers/staging/fbtft/Kconfig | 4 +
drivers/staging/fbtft/Makefile | 3 +
drivers/staging/fbtft/fbtft_device.c | 1444 ++++++++++++++++++++++++++++++++++
3 files changed, 1451 insertions(+)
create mode 100644 drivers/staging/fbtft/fbtft_device.c
diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
index d7ddd6e..995a910 100644
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -163,3 +163,7 @@ config FB_FLEX
depends on FB_TFT
help
Generic Framebuffer support for TFT LCD displays.
+
+config FB_TFT_FBTFT_DEVICE
+ tristate "Module to for adding FBTFT devices"
+ depends on FB_TFT
diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index 5b3254a..e773f0f 100644
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -29,3 +29,6 @@ obj-$(CONFIG_FB_TFT_UC1701) += fb_uc1701.o
obj-$(CONFIG_FB_TFT_UPD161704) += fb_upd161704.o
obj-$(CONFIG_FB_TFT_WATTEROTT) += fb_watterott.o
obj-$(CONFIG_FB_FLEX) += flexfb.o
+
+# Device modules
+obj-$(CONFIG_FB_TFT_FBTFT_DEVICE) += fbtft_device.o
diff --git a/drivers/staging/fbtft/fbtft_device.c b/drivers/staging/fbtft/fbtft_device.c
new file mode 100644
index 0000000..b9f4c30
--- /dev/null
+++ b/drivers/staging/fbtft/fbtft_device.c
@@ -0,0 +1,1444 @@
+/*
+ *
+ * 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 <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/spi/spi.h>
+
+#include "fbtft.h"
+
+#define DRVNAME "fbtft_device"
+
+#define MAX_GPIOS 32
+
+struct spi_device *spi_device;
+struct platform_device *p_device;
+
+static char *name;
+module_param(name, charp, 0);
+MODULE_PARM_DESC(name, "Devicename (required). " \
+"name=list => list all supported devices.");
+
+static unsigned rotate;
+module_param(rotate, uint, 0);
+MODULE_PARM_DESC(rotate,
+"Angle to rotate display counter clockwise: 0, 90, 180, 270");
+
+static unsigned busnum;
+module_param(busnum, uint, 0);
+MODULE_PARM_DESC(busnum, "SPI bus number (default=0)");
+
+static unsigned cs;
+module_param(cs, uint, 0);
+MODULE_PARM_DESC(cs, "SPI chip select (default=0)");
+
+static unsigned speed;
+module_param(speed, uint, 0);
+MODULE_PARM_DESC(speed, "SPI speed (override device default)");
+
+static int mode = -1;
+module_param(mode, int, 0);
+MODULE_PARM_DESC(mode, "SPI mode (override device default)");
+
+static char *gpios;
+module_param(gpios, charp, 0);
+MODULE_PARM_DESC(gpios,
+"List of gpios. Comma separated with the form: reset:23,dc:24 " \
+"(when overriding the default, all gpios must be specified)");
+
+static unsigned fps;
+module_param(fps, uint, 0);
+MODULE_PARM_DESC(fps, "Frames per second (override driver default)");
+
+static char *gamma;
+module_param(gamma, charp, 0);
+MODULE_PARM_DESC(gamma,
+"String representation of Gamma Curve(s). Driver specific.");
+
+static int txbuflen;
+module_param(txbuflen, int, 0);
+MODULE_PARM_DESC(txbuflen, "txbuflen (override driver default)");
+
+static int bgr = -1;
+module_param(bgr, int, 0);
+MODULE_PARM_DESC(bgr,
+"BGR bit (supported by some drivers).");
+
+static unsigned startbyte;
+module_param(startbyte, uint, 0);
+MODULE_PARM_DESC(startbyte, "Sets the Start byte used by some SPI displays.");
+
+static bool custom;
+module_param(custom, bool, 0);
+MODULE_PARM_DESC(custom, "Add a custom display device. " \
+"Use speed= argument to make it a SPI device, else platform_device");
+
+static unsigned width;
+module_param(width, uint, 0);
+MODULE_PARM_DESC(width, "Display width, used with the custom argument");
+
+static unsigned height;
+module_param(height, uint, 0);
+MODULE_PARM_DESC(height, "Display height, used with the custom argument");
+
+static unsigned buswidth = 8;
+module_param(buswidth, uint, 0);
+MODULE_PARM_DESC(buswidth, "Display bus width, used with the custom argument");
+
+static int init[FBTFT_MAX_INIT_SEQUENCE];
+static int init_num;
+module_param_array(init, int, &init_num, 0);
+MODULE_PARM_DESC(init, "Init sequence, used with the custom argument");
+
+static unsigned long debug;
+module_param(debug, ulong , 0);
+MODULE_PARM_DESC(debug,
+"level: 0-7 (the remaining 29 bits is for advanced usage)");
+
+static unsigned verbose = 3;
+module_param(verbose, uint, 0);
+MODULE_PARM_DESC(verbose,
+"0 silent, >0 show gpios, >1 show devices, >2 show devices before (default=3)");
+
+
+struct fbtft_device_display {
+ char *name;
+ struct spi_board_info *spi;
+ struct platform_device *pdev;
+};
+
+static void fbtft_device_pdev_release(struct device *dev);
+
+static int write_gpio16_wr_slow(struct fbtft_par *par, void *buf, size_t len);
+static void adafruit18_green_tab_set_addr_win(struct fbtft_par *par,
+ int xs, int ys, int xe, int ye);
+
+#define ADAFRUIT18_GAMMA \
+ "02 1c 07 12 37 32 29 2d 29 25 2B 39 00 01 03 10\n" \
+ "03 1d 07 06 2E 2C 29 2D 2E 2E 37 3F 00 00 02 10"
+
+static int hy28b_init_sequence[] = {
+ -1,0x00e7,0x0010,-1,0x0000,0x0001,-1,0x0001,0x0100,-1,0x0002,0x0700,
+ -1,0x0003,0x1030,-1,0x0004,0x0000,-1,0x0008,0x0207,-1,0x0009,0x0000,
+ -1,0x000a,0x0000,-1,0x000c,0x0001,-1,0x000d,0x0000,-1,0x000f,0x0000,
+ -1,0x0010,0x0000,-1,0x0011,0x0007,-1,0x0012,0x0000,-1,0x0013,0x0000,
+ -2,50,-1,0x0010,0x1590,-1,0x0011,0x0227,-2,50,-1,0x0012,0x009c,-2,50,
+ -1,0x0013,0x1900,-1,0x0029,0x0023,-1,0x002b,0x000e,-2,50,
+ -1,0x0020,0x0000,-1,0x0021,0x0000,-2,50,-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,-1,0x0092,0x0000,-1,0x0093,0x0003,-1,0x0095,0x0110,
+ -1,0x0097,0x0000,-1,0x0098,0x0000,-1,0x0007,0x0133,-1,0x0020,0x0000,
+ -1,0x0021,0x0000,-2,100,-3 };
+
+#define HY28B_GAMMA \
+ "04 1F 4 7 7 0 7 7 6 0\n" \
+ "0F 00 1 7 4 0 0 0 6 7"
+
+static int pitft_init_sequence[] = {
+ -1,0x01,-2,5,-1,0x28,-1,0xEF,0x03,0x80,0x02,-1,0xCF,0x00,0xC1,0x30,
+ -1,0xED,0x64,0x03,0x12,0x81,-1,0xE8,0x85,0x00,0x78,
+ -1,0xCB,0x39,0x2C,0x00,0x34,0x02,-1,0xF7,0x20,-1,0xEA,0x00,0x00,
+ -1,0xC0,0x23,-1,0xC1,0x10,-1,0xC5,0x3e,0x28,-1,0xC7,0x86,-1,0x3A,0x55,
+ -1,0xB1,0x00,0x18,-1,0xB6,0x08,0x82,0x27,-1,0xF2,0x00,-1,0x26,0x01,
+ -1,0xE0,0x0F,0x31,0x2B,0x0C,0x0E,0x08,0x4E,0xF1,0x37,0x07,0x10,0x03,
+ 0x0E,0x09,0x00,-1,0xE1,0x00,0x0E,0x14,0x03,0x11,0x07,0x31,0xC1,0x48,
+ 0x08,0x0F,0x0C,0x31,0x36,0x0F,-1,0x11,-2,100,-1,0x29,-2,20,-3 };
+
+static int waveshare32b_init_sequence[] = {
+ -1,0xCB,0x39,0x2C,0x00,0x34,0x02,-1,0xCF,0x00,0xC1,0x30,
+ -1,0xE8,0x85,0x00,0x78,-1,0xEA,0x00,0x00,-1,0xED,0x64,0x03,0x12,0x81,
+ -1,0xF7,0x20,-1,0xC0,0x23,-1,0xC1,0x10,-1,0xC5,0x3e,0x28,-1,0xC7,0x86,
+ -1,0x36,0x28,-1,0x3A,0x55,-1,0xB1,0x00,0x18,-1,0xB6,0x08,0x82,0x27,
+ -1,0xF2,0x00,-1,0x26,0x01,
+ -1,0xE0,0x0F,0x31,0x2B,0x0C,0x0E,0x08,0x4E,0xF1,0x37,0x07,0x10,0x03,0x0E,0x09,0x00,
+ -1,0xE1,0x00,0x0E,0x14,0x03,0x11,0x07,0x31,0xC1,0x48,0x08,0x0F,0x0C,0x31,0x36,0x0F,
+ -1,0x11,-2,120,-1,0x29,-1,0x2c,-3 };
+
+/* Supported displays in alphabetical order */
+static struct fbtft_device_display displays[] = {
+ {
+ .name = "adafruit18",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_st7735r",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ .gamma = ADAFRUIT18_GAMMA,
+ }
+ }
+ }, {
+ .name = "adafruit18_green",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_st7735r",
+ .max_speed_hz = 4000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ .fbtftops.set_addr_win = \
+ adafruit18_green_tab_set_addr_win,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ .gamma = ADAFRUIT18_GAMMA,
+ }
+ }
+ }, {
+ .name = "adafruit22",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_hx8340bn",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 9,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "led", 23 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "adafruit22a",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9340",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "adafruit28",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9341",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "adafruit13m",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ssd1306",
+ .max_speed_hz = 16000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "agm1264k-fl",
+ .pdev = &(struct platform_device) {
+ .name = "fb_agm1264k-fl",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = FBTFT_ONBOARD_BACKLIGHT,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ },
+ }
+ }
+ }, {
+ .name = "dogs102",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_uc1701",
+ .max_speed_hz = 8000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 13 },
+ { "dc", 6 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "er_tftm050_2",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ra8875",
+ .max_speed_hz = 5000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ .width = 480,
+ .height = 272,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "er_tftm070_5",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ra8875",
+ .max_speed_hz = 5000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ .width = 800,
+ .height = 480,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "flexfb",
+ .spi = &(struct spi_board_info) {
+ .modalias = "flexfb",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "flexpfb",
+ .pdev = &(struct platform_device) {
+ .name = "flexpfb",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 17 },
+ { "dc", 1 },
+ { "wr", 0 },
+ { "cs", 21 },
+ { "db00", 9 },
+ { "db01", 11 },
+ { "db02", 18 },
+ { "db03", 23 },
+ { "db04", 24 },
+ { "db05", 25 },
+ { "db06", 8 },
+ { "db07", 7 },
+ { "led", 4 },
+ {},
+ },
+ },
+ }
+ }
+ }, {
+ .name = "freetronicsoled128",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ssd1351",
+ .max_speed_hz = 20000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = FBTFT_ONBOARD_BACKLIGHT,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 24 },
+ { "dc", 25 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "hx8353d",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_hx8353d",
+ .max_speed_hz = 16000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 23 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "hy28a",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9320",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .startbyte = 0b01110000,
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "hy28b",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9325",
+ .max_speed_hz = 48000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ .init_sequence = hy28b_init_sequence,
+ },
+ .startbyte = 0b01110000,
+ .bgr = true,
+ .fps= 50,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "led", 18 },
+ {},
+ },
+ .gamma = HY28B_GAMMA,
+ }
+ }
+ }, {
+ .name = "ili9481",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9481",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .regwidth = 16,
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 22 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "itdb24",
+ .pdev = &(struct platform_device) {
+ .name = "fb_s6d1121",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = false,
+ .gpios = (const struct fbtft_gpio []) {
+ /* Wiring for LCD adapter kit */
+ { "reset", 7 },
+ { "dc", 0 }, /* rev 2: 2 */
+ { "wr", 1 }, /* rev 2: 3 */
+ { "cs", 8 },
+ { "db00", 17 },
+ { "db01", 18 },
+ { "db02", 21 }, /* rev 2: 27 */
+ { "db03", 22 },
+ { "db04", 23 },
+ { "db05", 24 },
+ { "db06", 25 },
+ { "db07", 4 },
+ {}
+ },
+ },
+ }
+ }
+ }, {
+ .name = "itdb28",
+ .pdev = &(struct platform_device) {
+ .name = "fb_ili9325",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ },
+ }
+ }
+ }, {
+ .name = "itdb28_spi",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9325",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "mi0283qt-2",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_hx8347d",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .startbyte = 0b01110000,
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "mi0283qt-9a",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9341",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 9,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "mi0283qt-v2",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_watterott",
+ .max_speed_hz = 4000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "nokia3310",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_pcd8544",
+ .max_speed_hz = 400000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 23 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "nokia3310a",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_tls8204",
+ .max_speed_hz = 1000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 23 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "piscreen",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9486",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .regwidth = 16,
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 22 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "pitft",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9340",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .chip_select = 0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ .init_sequence = pitft_init_sequence,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "dc", 25 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "pioled",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ssd1351",
+ .max_speed_hz = 20000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 24 },
+ { "dc", 25 },
+ {},
+ },
+ .gamma = "0 2 2 2 2 2 2 2 " \
+ "2 2 2 2 2 2 2 2 " \
+ "2 2 2 2 2 2 2 2 " \
+ "2 2 2 2 2 2 2 3 " \
+ "3 3 3 3 3 3 3 3 " \
+ "3 3 3 3 3 3 3 3 " \
+ "3 3 3 4 4 4 4 4 " \
+ "4 4 4 4 4 4 4"
+ }
+ }
+ }, {
+ .name = "rpi-display",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9341",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 23 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "s6d02a1",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_s6d02a1",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 23 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "sainsmart18",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_st7735r",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "sainsmart32",
+ .pdev = &(struct platform_device) {
+ .name = "fb_ssd1289",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 16,
+ .txbuflen = -2, /* disable buffer */
+ .backlight = 1,
+ .fbtftops.write = write_gpio16_wr_slow,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ },
+ },
+ }
+ }, {
+ .name = "sainsmart32_fast",
+ .pdev = &(struct platform_device) {
+ .name = "fb_ssd1289",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 16,
+ .txbuflen = -2, /* disable buffer */
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ },
+ },
+ }
+ }, {
+ .name = "sainsmart32_latched",
+ .pdev = &(struct platform_device) {
+ .name = "fb_ssd1289",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 16,
+ .txbuflen = -2, /* disable buffer */
+ .backlight = 1,
+ .fbtftops.write = \
+ fbtft_write_gpio16_wr_latched,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ },
+ },
+ }
+ }, {
+ .name = "sainsmart32_spi",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ssd1289",
+ .max_speed_hz = 16000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "spidev",
+ .spi = &(struct spi_board_info) {
+ .modalias = "spidev",
+ .max_speed_hz = 500000,
+ .bus_num = 0,
+ .chip_select = 0,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "ssd1331",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ssd1331",
+ .max_speed_hz = 20000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 24 },
+ { "dc", 25 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "tinylcd35",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_tinylcd",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "tm022hdh26",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9341",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 25 },
+ { "dc", 24 },
+ { "led", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "tontec35_9481", /* boards before 02 July 2014 */
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9481",
+ .max_speed_hz = 128000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 15 },
+ { "dc", 25 },
+ { "led_", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "tontec35_9486", /* boards after 02 July 2014 */
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9486",
+ .max_speed_hz = 128000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 15 },
+ { "dc", 25 },
+ { "led_", 18 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "upd161704",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_upd161704",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 24 },
+ { "dc", 25 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "waveshare32b",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_ili9340",
+ .max_speed_hz = 48000000,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ .backlight = 1,
+ .init_sequence = waveshare32b_init_sequence,
+ },
+ .bgr = true,
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 27 },
+ { "dc", 22 },
+ {},
+ },
+ }
+ }
+ }, {
+ .name = "waveshare22",
+ .spi = &(struct spi_board_info) {
+ .modalias = "fb_bd663474",
+ .max_speed_hz = 32000000,
+ .mode = SPI_MODE_3,
+ .platform_data = &(struct fbtft_platform_data) {
+ .display = {
+ .buswidth = 8,
+ },
+ .gpios = (const struct fbtft_gpio []) {
+ { "reset", 24 },
+ { "dc", 25 },
+ {},
+ },
+ }
+ }
+ }, {
+ /* This should be the last item.
+ Used with the custom argument */
+ .name = "",
+ .spi = &(struct spi_board_info) {
+ .modalias = "",
+ .max_speed_hz = 0,
+ .mode = SPI_MODE_0,
+ .platform_data = &(struct fbtft_platform_data) {
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ }
+ },
+ .pdev = &(struct platform_device) {
+ .name = "",
+ .id = 0,
+ .dev = {
+ .release = fbtft_device_pdev_release,
+ .platform_data = &(struct fbtft_platform_data) {
+ .gpios = (const struct fbtft_gpio []) {
+ {},
+ },
+ },
+ },
+ },
+ }
+};
+
+static int write_gpio16_wr_slow(struct fbtft_par *par, void *buf, size_t len)
+{
+ u16 data;
+ int i;
+#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
+ static u16 prev_data;
+#endif
+
+ fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
+ "%s(len=%d): ", __func__, len);
+
+ while (len) {
+ data = *(u16 *) buf;
+
+ /* Start writing by pulling down /WR */
+ gpio_set_value(par->gpio.wr, 0);
+
+ /* Set data */
+#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
+ if (data == prev_data) {
+ gpio_set_value(par->gpio.wr, 0); /* used as delay */
+ } else {
+ for (i = 0; i < 16; i++) {
+ if ((data & 1) != (prev_data & 1))
+ gpio_set_value(par->gpio.db[i],
+ (data & 1));
+ data >>= 1;
+ prev_data >>= 1;
+ }
+ }
+#else
+ for (i = 0; i < 16; i++) {
+ gpio_set_value(par->gpio.db[i], (data & 1));
+ data >>= 1;
+ }
+#endif
+
+ /* Pullup /WR */
+ gpio_set_value(par->gpio.wr, 1);
+
+#ifndef DO_NOT_OPTIMIZE_FBTFT_WRITE_GPIO
+ prev_data = *(u16 *) buf;
+#endif
+ buf += 2;
+ len -= 2;
+ }
+
+ return 0;
+}
+
+static void adafruit18_green_tab_set_addr_win(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, 0x2A, 0, xs + 2, 0, xe + 2);
+ write_reg(par, 0x2B, 0, ys + 1, 0, ye + 1);
+ write_reg(par, 0x2C);
+}
+
+/* used if gpios parameter is present */
+static struct fbtft_gpio fbtft_device_param_gpios[MAX_GPIOS+1] = { };
+
+static void fbtft_device_pdev_release(struct device *dev)
+{
+/* Needed to silence this message:
+Device 'xxx' does not have a release() function, it is broken and must be fixed
+*/
+}
+
+static int spi_device_found(struct device *dev, void *data)
+{
+ struct spi_device *spi = container_of(dev, struct spi_device, dev);
+
+ pr_info(DRVNAME": %s %s %dkHz %d bits mode=0x%02X\n",
+ spi->modalias, dev_name(dev), spi->max_speed_hz/1000,
+ spi->bits_per_word, spi->mode);
+
+ return 0;
+}
+
+static void pr_spi_devices(void)
+{
+ pr_info(DRVNAME": SPI devices registered:\n");
+ bus_for_each_dev(&spi_bus_type, NULL, NULL, spi_device_found);
+}
+
+static int p_device_found(struct device *dev, void *data)
+{
+ struct platform_device
+ *pdev = container_of(dev, struct platform_device, dev);
+
+ if (strstr(pdev->name, "fb"))
+ pr_info(DRVNAME": %s id=%d pdata? %s\n",
+ pdev->name, pdev->id,
+ pdev->dev.platform_data ? "yes" : "no");
+
+ return 0;
+}
+
+static void pr_p_devices(void)
+{
+ pr_info(DRVNAME": 'fb' Platform devices registered:\n");
+ bus_for_each_dev(&platform_bus_type, NULL, NULL, p_device_found);
+}
+
+#ifdef MODULE
+static void fbtft_device_spi_delete(struct spi_master *master, unsigned cs)
+{
+ struct device *dev;
+ char str[32];
+
+ snprintf(str, sizeof(str), "%s.%u", dev_name(&master->dev), cs);
+
+ dev = bus_find_device_by_name(&spi_bus_type, NULL, str);
+ if (dev) {
+ if (verbose)
+ pr_info(DRVNAME": Deleting %s\n", str);
+ device_del(dev);
+ }
+}
+
+static int fbtft_device_spi_device_register(struct spi_board_info *spi)
+{
+ struct spi_master *master;
+
+ master = spi_busnum_to_master(spi->bus_num);
+ if (!master) {
+ pr_err(DRVNAME ": spi_busnum_to_master(%d) returned NULL\n",
+ spi->bus_num);
+ return -EINVAL;
+ }
+ /* make sure it's available */
+ fbtft_device_spi_delete(master, spi->chip_select);
+ spi_device = spi_new_device(master, spi);
+ put_device(&master->dev);
+ if (!spi_device) {
+ pr_err(DRVNAME ": spi_new_device() returned NULL\n");
+ return -EPERM;
+ }
+ return 0;
+}
+#else
+static int fbtft_device_spi_device_register(struct spi_board_info *spi)
+{
+ return spi_register_board_info(spi, 1);
+}
+#endif
+
+static int __init fbtft_device_init(void)
+{
+ struct spi_board_info *spi = NULL;
+ struct fbtft_platform_data *pdata;
+ const struct fbtft_gpio *gpio = NULL;
+ char *p_gpio, *p_name, *p_num;
+ bool found = false;
+ int i = 0;
+ long val;
+ int ret = 0;
+
+ pr_debug("\n\n"DRVNAME": init\n");
+
+ if (name == NULL) {
+#ifdef MODULE
+ pr_err(DRVNAME": missing module parameter: 'name'\n");
+ return -EINVAL;
+#else
+ return 0;
+#endif
+ }
+
+ if (init_num > FBTFT_MAX_INIT_SEQUENCE) {
+ pr_err(DRVNAME \
+ ": init parameter: exceeded max array size: %d\n",
+ FBTFT_MAX_INIT_SEQUENCE);
+ return -EINVAL;
+ }
+
+ /* parse module parameter: gpios */
+ while ((p_gpio = strsep(&gpios, ","))) {
+ if (strchr(p_gpio, ':') == NULL) {
+ pr_err(DRVNAME \
+ ": error: missing ':' in gpios parameter: %s\n",
+ p_gpio);
+ return -EINVAL;
+ }
+ p_num = p_gpio;
+ p_name = strsep(&p_num, ":");
+ if (p_name == NULL || p_num == NULL) {
+ pr_err(DRVNAME \
+ ": something bad happened parsing gpios parameter: %s\n",
+ p_gpio);
+ return -EINVAL;
+ }
+ ret = kstrtol(p_num, 10, &val);
+ if (ret) {
+ pr_err(DRVNAME \
+ ": could not parse number in gpios parameter: %s:%s\n",
+ p_name, p_num);
+ return -EINVAL;
+ }
+ strcpy(fbtft_device_param_gpios[i].name, p_name);
+ fbtft_device_param_gpios[i++].gpio = (int) val;
+ if (i == MAX_GPIOS) {
+ pr_err(DRVNAME \
+ ": gpios parameter: exceeded max array size: %d\n",
+ MAX_GPIOS);
+ return -EINVAL;
+ }
+ }
+ if (fbtft_device_param_gpios[0].name[0])
+ gpio = fbtft_device_param_gpios;
+
+ if (verbose > 2)
+ pr_spi_devices(); /* print list of registered SPI devices */
+
+ if (verbose > 2)
+ pr_p_devices(); /* print list of 'fb' platform devices */
+
+ pr_debug(DRVNAME": name='%s', busnum=%d, cs=%d\n", name, busnum, cs);
+
+ if (rotate > 0 && rotate < 4) {
+ rotate = (4 - rotate) * 90;
+ pr_warn("argument 'rotate' should be an angle. Values 1-3 is deprecated. Setting it to %d.\n",
+ rotate);
+ }
+ if (rotate != 0 && rotate != 90 && rotate != 180 && rotate != 270) {
+ pr_warn("argument 'rotate' illegal value: %d. Setting it to 0.\n",
+ rotate);
+ rotate = 0;
+ }
+
+ /* name=list lists all supported displays */
+ if (strncmp(name, "list", 32) == 0) {
+ pr_info(DRVNAME": Supported displays:\n");
+
+ for (i = 0; i < ARRAY_SIZE(displays); i++)
+ pr_info(DRVNAME": %s\n", displays[i].name);
+ return -ECANCELED;
+ }
+
+ if (custom) {
+ i = ARRAY_SIZE(displays) - 1;
+ displays[i].name = name;
+ if (speed == 0) {
+ displays[i].pdev->name = name;
+ displays[i].spi = NULL;
+ } else {
+ strncpy(displays[i].spi->modalias, name, SPI_NAME_SIZE);
+ displays[i].pdev = NULL;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(displays); i++) {
+ if (strncmp(name, displays[i].name, 32) == 0) {
+ if (displays[i].spi) {
+ spi = displays[i].spi;
+ spi->chip_select = cs;
+ spi->bus_num = busnum;
+ if (speed)
+ spi->max_speed_hz = speed;
+ if (mode != -1)
+ spi->mode = mode;
+ pdata = (void *)spi->platform_data;
+ } else if (displays[i].pdev) {
+ p_device = displays[i].pdev;
+ pdata = p_device->dev.platform_data;
+ } else {
+ pr_err(DRVNAME": broken displays array\n");
+ return -EINVAL;
+ }
+
+ pdata->rotate = rotate;
+ if (bgr == 0)
+ pdata->bgr = false;
+ else if (bgr == 1)
+ pdata->bgr = true;
+ if (startbyte)
+ pdata->startbyte = startbyte;
+ if (gamma)
+ pdata->gamma = gamma;
+ pdata->display.debug = debug;
+ if (fps)
+ pdata->fps = fps;
+ if (txbuflen)
+ pdata->txbuflen = txbuflen;
+ if (init_num)
+ pdata->display.init_sequence = init;
+ if (gpio)
+ pdata->gpios = gpio;
+ if (custom) {
+ pdata->display.width = width;
+ pdata->display.height = height;
+ pdata->display.buswidth = buswidth;
+ pdata->display.backlight = 1;
+ }
+
+ if (displays[i].spi) {
+ ret = fbtft_device_spi_device_register(spi);
+ if (ret) {
+ pr_err(DRVNAME \
+ ": failed to register SPI device\n");
+ return ret;
+ }
+ found = true;
+ break;
+ } else {
+ ret = platform_device_register(p_device);
+ if (ret < 0) {
+ pr_err(DRVNAME \
+ ": platform_device_register() returned %d\n",
+ ret);
+ return ret;
+ }
+ found = true;
+ break;
+ }
+ }
+ }
+
+ if (!found) {
+ pr_err(DRVNAME": display not supported: '%s'\n", name);
+ return -EINVAL;
+ }
+
+ if (verbose && pdata && pdata->gpios) {
+ gpio = pdata->gpios;
+ pr_info(DRVNAME": GPIOS used by '%s':\n", name);
+ found = false;
+ while (verbose && gpio->name[0]) {
+ pr_info(DRVNAME": '%s' = GPIO%d\n",
+ gpio->name, gpio->gpio);
+ gpio++;
+ found = true;
+ }
+ if (!found)
+ pr_info(DRVNAME": (none)\n");
+ }
+
+ if (spi_device && (verbose > 1))
+ pr_spi_devices();
+ if (p_device && (verbose > 1))
+ pr_p_devices();
+
+ return 0;
+}
+
+static void __exit fbtft_device_exit(void)
+{
+ pr_debug(DRVNAME" - exit\n");
+
+ if (spi_device) {
+ device_del(&spi_device->dev);
+ kfree(spi_device);
+ }
+
+ if (p_device)
+ platform_device_unregister(p_device);
+
+}
+
+arch_initcall(fbtft_device_init);
+module_exit(fbtft_device_exit);
+
+MODULE_DESCRIPTION("Add a FBTFT device.");
+MODULE_AUTHOR("Noralf Tronnes");
+MODULE_LICENSE("GPL");
--
2.1.0
More information about the devel
mailing list