1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef OLPC_DCON_H_ 3#define OLPC_DCON_H_ 4 5#include <linux/notifier.h> 6#include <linux/workqueue.h> 7 8/* DCON registers */ 9 10#define DCON_REG_ID 0 11#define DCON_REG_MODE 1 12 13#define MODE_PASSTHRU (1<<0) 14#define MODE_SLEEP (1<<1) 15#define MODE_SLEEP_AUTO (1<<2) 16#define MODE_BL_ENABLE (1<<3) 17#define MODE_BLANK (1<<4) 18#define MODE_CSWIZZLE (1<<5) 19#define MODE_COL_AA (1<<6) 20#define MODE_MONO_LUMA (1<<7) 21#define MODE_SCAN_INT (1<<8) 22#define MODE_CLOCKDIV (1<<9) 23#define MODE_DEBUG (1<<14) 24#define MODE_SELFTEST (1<<15) 25 26#define DCON_REG_HRES 0x2 27#define DCON_REG_HTOTAL 0x3 28#define DCON_REG_HSYNC_WIDTH 0x4 29#define DCON_REG_VRES 0x5 30#define DCON_REG_VTOTAL 0x6 31#define DCON_REG_VSYNC_WIDTH 0x7 32#define DCON_REG_TIMEOUT 0x8 33#define DCON_REG_SCAN_INT 0x9 34#define DCON_REG_BRIGHT 0xa 35#define DCON_REG_MEM_OPT_A 0x41 36#define DCON_REG_MEM_OPT_B 0x42 37 38/* Load Delay Locked Loop (DLL) settings for clock delay */ 39#define MEM_DLL_CLOCK_DELAY (1<<0) 40/* Memory controller power down function */ 41#define MEM_POWER_DOWN (1<<8) 42/* Memory controller software reset */ 43#define MEM_SOFT_RESET (1<<0) 44 45/* Status values */ 46 47#define DCONSTAT_SCANINT 0 48#define DCONSTAT_SCANINT_DCON 1 49#define DCONSTAT_DISPLAYLOAD 2 50#define DCONSTAT_MISSED 3 51 52/* Source values */ 53 54#define DCON_SOURCE_DCON 0 55#define DCON_SOURCE_CPU 1 56 57/* Interrupt */ 58#define DCON_IRQ 6 59 60struct dcon_priv { 61 struct i2c_client *client; 62 struct fb_info *fbinfo; 63 struct backlight_device *bl_dev; 64 65 wait_queue_head_t waitq; 66 struct work_struct switch_source; 67 struct notifier_block reboot_nb; 68 69 /* Shadow register for the DCON_REG_MODE register */ 70 u8 disp_mode; 71 72 /* The current backlight value - this saves us some smbus traffic */ 73 u8 bl_val; 74 75 /* Current source, initialized at probe time */ 76 int curr_src; 77 78 /* Desired source */ 79 int pending_src; 80 81 /* Variables used during switches */ 82 bool switched; 83 ktime_t irq_time; 84 ktime_t load_time; 85 86 /* Current output type; true == mono, false == color */ 87 bool mono; 88 bool asleep; 89 /* This get set while controlling fb blank state from the driver */ 90 bool ignore_fb_events; 91}; 92 93struct dcon_platform_data { 94 int (*init)(struct dcon_priv *); 95 void (*bus_stabilize_wiggle)(void); 96 void (*set_dconload)(int); 97 int (*read_status)(u8 *); 98}; 99 100#include <linux/interrupt.h> 101 102irqreturn_t dcon_interrupt(int irq, void *id); 103 104#ifdef CONFIG_FB_OLPC_DCON_1 105extern struct dcon_platform_data dcon_pdata_xo_1; 106#endif 107 108#ifdef CONFIG_FB_OLPC_DCON_1_5 109extern struct dcon_platform_data dcon_pdata_xo_1_5; 110#endif 111 112#endif 113