1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Header file for: 4 * DRM driver for Solomon SSD130x OLED displays 5 * 6 * Copyright 2022 Red Hat Inc. 7 * Author: Javier Martinez Canillas <javierm@redhat.com> 8 * 9 * Based on drivers/video/fbdev/ssd1307fb.c 10 * Copyright 2012 Free Electrons 11 */ 12 13 #ifndef __SSD1307X_H__ 14 #define __SSD1307X_H__ 15 16 #include <drm/drm_connector.h> 17 #include <drm/drm_crtc.h> 18 #include <drm/drm_drv.h> 19 #include <drm/drm_encoder.h> 20 #include <drm/drm_plane_helper.h> 21 22 #include <linux/regmap.h> 23 24 #define SSD130X_DATA 0x40 25 #define SSD130X_COMMAND 0x80 26 27 enum ssd130x_variants { 28 SH1106_ID, 29 SSD1305_ID, 30 SSD1306_ID, 31 SSD1307_ID, 32 SSD1309_ID, 33 NR_SSD130X_VARIANTS 34 }; 35 36 struct ssd130x_deviceinfo { 37 u32 default_vcomh; 38 u32 default_dclk_div; 39 u32 default_dclk_frq; 40 int need_pwm; 41 int need_chargepump; 42 bool page_mode_only; 43 }; 44 45 struct ssd130x_device { 46 struct drm_device drm; 47 struct device *dev; 48 struct drm_display_mode mode; 49 struct drm_plane primary_plane; 50 struct drm_crtc crtc; 51 struct drm_encoder encoder; 52 struct drm_connector connector; 53 struct i2c_client *client; 54 55 struct regmap *regmap; 56 57 const struct ssd130x_deviceinfo *device_info; 58 59 unsigned page_address_mode : 1; 60 unsigned area_color_enable : 1; 61 unsigned com_invdir : 1; 62 unsigned com_lrremap : 1; 63 unsigned com_seq : 1; 64 unsigned lookup_table_set : 1; 65 unsigned low_power : 1; 66 unsigned seg_remap : 1; 67 u32 com_offset; 68 u32 contrast; 69 u32 dclk_div; 70 u32 dclk_frq; 71 u32 height; 72 u8 lookup_table[4]; 73 u32 page_offset; 74 u32 col_offset; 75 u32 prechargep1; 76 u32 prechargep2; 77 78 struct backlight_device *bl_dev; 79 struct pwm_device *pwm; 80 struct gpio_desc *reset; 81 struct regulator *vcc_reg; 82 u32 vcomh; 83 u32 width; 84 /* Cached address ranges */ 85 u8 col_start; 86 u8 col_end; 87 u8 page_start; 88 u8 page_end; 89 }; 90 91 extern const struct ssd130x_deviceinfo ssd130x_variants[]; 92 93 struct ssd130x_device *ssd130x_probe(struct device *dev, struct regmap *regmap); 94 void ssd130x_remove(struct ssd130x_device *ssd130x); 95 void ssd130x_shutdown(struct ssd130x_device *ssd130x); 96 97 #endif /* __SSD1307X_H__ */ 98