staging: fbtft: Add support for ili9163 controller

Driver for ili9163-based displays (for example: Nokia 5110)

Signed-off-by: Kozhevnikov Anatoly <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/fbtft/Kconfig

···
 	help
 	  Generic Framebuffer support for HX8353D
 
+config FB_TFT_ILI9163
+	tristate "FB driver for the ILI9163 LCD Controller"
+	depends on FB_TFT
+	help
+	  Generic Framebuffer support for ILI9163
+
 config FB_TFT_ILI9320
 	tristate "FB driver for the ILI9320 LCD Controller"
 	depends on FB_TFT

drivers/staging/fbtft/Makefile

···
 obj-$(CONFIG_FB_TFT_HX8340BN)    += fb_hx8340bn.o
 obj-$(CONFIG_FB_TFT_HX8347D)     += fb_hx8347d.o
 obj-$(CONFIG_FB_TFT_HX8353D)     += fb_hx8353d.o
+obj-$(CONFIG_FB_TFT_ILI9163)     += fb_ili9163.o
 obj-$(CONFIG_FB_TFT_ILI9320)     += fb_ili9320.o
 obj-$(CONFIG_FB_TFT_ILI9325)     += fb_ili9325.o
 obj-$(CONFIG_FB_TFT_ILI9340)     += fb_ili9340.o

drivers/staging/fbtft/fb_ili9163.c

···
+/*
+ * 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).
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/delay.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_NOP		0x00 /* Non operation*/
+#define CMD_SWRESET	0x01 /* Soft Reset */
+#define CMD_SLPIN	0x10 /* Sleep ON */
+#define CMD_SLPOUT	0x11 /* Sleep OFF */
+#define CMD_PTLON	0x12 /* Partial Mode ON */
+#define CMD_NORML	0x13 /* Normal Display ON */
+#define CMD_DINVOF	0x20 /* Display Inversion OFF */
+#define CMD_DINVON	0x21 /* Display Inversion ON */
+#define CMD_GAMMASET	0x26 /* Gamma Set (0x01[1],0x02[2],0x04[3],0x08[4]) */
+#define CMD_DISPOFF	0x28 /* Display OFF */
+#define CMD_DISPON	0x29 /* Display ON */
+#define CMD_IDLEON	0x39 /* Idle Mode ON */
+#define CMD_IDLEOF	0x38 /* Idle Mode OFF */
+#define CMD_CLMADRS	0x2A /* Column Address Set */
+#define CMD_PGEADRS	0x2B /* Page Address Set */
+
+#define CMD_RAMWR	0x2C /* Memory Write */
+#define CMD_RAMRD	0x2E /* Memory Read */
+#define CMD_CLRSPACE	0x2D /* Color Space : 4K/65K/262K */
+#define CMD_PARTAREA	0x30 /* Partial Area */
+#define CMD_VSCLLDEF	0x33 /* Vertical Scroll Definition */
+#define CMD_TEFXLON	0x34 /* Tearing Effect Line ON */
+#define CMD_TEFXLOF	0x35 /* Tearing Effect Line OFF */
+#define CMD_MADCTL	0x36 /* Memory Access Control */
+
+#define CMD_PIXFMT	0x3A /* Interface Pixel Format */
+#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)
+{
+	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+	par->fbtftops.reset(par);
+
+	if (par->gpio.cs != -1)
+		gpio_set_value(par->gpio.cs, 0);  /* Activate chip */
+
+	write_reg(par, CMD_SWRESET); /* software reset */
+	mdelay(500);
+	write_reg(par, CMD_SLPOUT); /* exit sleep */
+	mdelay(5);
+	write_reg(par, CMD_PIXFMT, 0x05); /* Set Color Format 16bit */
+	write_reg(par, CMD_GAMMASET, 0x02); /* default gamma curve 3 */
+#ifdef GAMMA_ADJ
+	write_reg(par, CMD_GAMRSEL, 0x01); /* Enable Gamma adj */
+#endif
+	write_reg(par, CMD_NORML);
+	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, CMD_CLMADRS, 0, 0, 0, WIDTH); /* Set Column Address */
+	write_reg(par, CMD_PGEADRS, 0, 0, 0, HEIGHT); /* Set Page Address */
+
+	write_reg(par, CMD_DISPON); /* display ON */
+	write_reg(par, CMD_RAMWR); /* Memory Write */
+
+	return 0;
+}
+
+static void 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);
+
+	switch (par->info->var.rotate) {
+	case 0:
+		write_reg(par, CMD_CLMADRS, xs >> 8, xs & 0xff, xe >> 8,
+				xe & 0xff);
+		write_reg(par, CMD_PGEADRS,
+				(ys + __OFFSET) >> 8, (ys + __OFFSET) & 0xff,
+				(ye + __OFFSET) >> 8, (ye + __OFFSET) & 0xff);
+		break;
+	case 90:
+		write_reg(par, CMD_CLMADRS,
+				(xs + __OFFSET) >> 8, (xs + __OFFSET) & 0xff,
+				(xe + __OFFSET) >> 8, (xe + __OFFSET) & 0xff);
+		write_reg(par, CMD_PGEADRS, ys >> 8, ys & 0xff, ye >> 8,
+				ye & 0xff);
+		break;
+	case 180:
+	case 270:
+		write_reg(par, CMD_CLMADRS, xs >> 8, xs & 0xff, xe >> 8,
+				xe & 0xff);
+		write_reg(par, CMD_PGEADRS, ys >> 8, ys & 0xff, ye >> 8,
+				ye & 0xff);
+		break;
+	default:
+		par->info->var.rotate = 0; /* Fix incorrect setting */
+	}
+	write_reg(par, CMD_RAMWR); /* Write Data to GRAM mode */
+}
+
+/*
+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 */
+
+	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+	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 |= (1 << 2);
+	write_reg(par, CMD_MADCTL, mactrl_data);
+	write_reg(par, CMD_RAMWR); /* Write Data to GRAM mode */
+	return 0;
+}
+
+#ifdef GAMMA_ADJ
+#define CURVE(num, idx)  curves[num*par->gamma.num_values + idx]
+static int gamma_adj(struct fbtft_par *par, unsigned long *curves)
+{
+	unsigned long mask[] = {
+		0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+		0x1f, 0x3f, 0x0f, 0x0f, 0x7f, 0x1f,
+		0x3F, 0x3F, 0x3F, 0x3F, 0x3F};
+	int i, j;
+
+	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+	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_reg(par, CMD_RAMWR); /* Write Data to GRAM mode */
+
+	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");

drivers/staging/fbtft/fbtft_device.c

···
 			}
 		}
 	}, {
+		.name = "nokia5110",
+		.spi = &(struct spi_board_info) {
+			.modalias = "fb_ili9163",
+			.max_speed_hz = 12000000,
+			.mode = SPI_MODE_0,
+			.platform_data = &(struct fbtft_platform_data) {
+				.display = {
+					.buswidth = 8,
+					.backlight = 1,
+				},
+				.bgr = true,
+				.gpios = (const struct fbtft_gpio []) {
+					{},
+				},
+			}
+		}
+	}, {
+
 		.name = "piscreen",
 		.spi = &(struct spi_board_info) {
 			.modalias = "fb_ili9486",