/* SPDX-License-Identifier: GPL-2.0 */ #ifndef OLPC_DCON_H_ #define OLPC_DCON_H_ #include <linux/notifier.h> #include <linux/workqueue.h> /* DCON registers */ #define DCON_REG_ID 0 #define DCON_REG_MODE 1 #define MODE_PASSTHRU BIT(0) #define MODE_SLEEP BIT(1) #define MODE_SLEEP_AUTO BIT(2) #define MODE_BL_ENABLE BIT(3) #define MODE_BLANK BIT(4) #define MODE_CSWIZZLE BIT(5) #define MODE_COL_AA BIT(6) #define MODE_MONO_LUMA BIT(7) #define MODE_SCAN_INT BIT(8) #define MODE_CLOCKDIV BIT(9) #define MODE_DEBUG BIT(14) #define MODE_SELFTEST BIT(15) #define DCON_REG_HRES 0x2 #define DCON_REG_HTOTAL 0x3 #define DCON_REG_HSYNC_WIDTH 0x4 #define DCON_REG_VRES 0x5 #define DCON_REG_VTOTAL 0x6 #define DCON_REG_VSYNC_WIDTH 0x7 #define DCON_REG_TIMEOUT 0x8 #define DCON_REG_SCAN_INT 0x9 #define DCON_REG_BRIGHT 0xa #define DCON_REG_MEM_OPT_A 0x41 #define DCON_REG_MEM_OPT_B 0x42 /* Load Delay Locked Loop (DLL) settings for clock delay */ #define MEM_DLL_CLOCK_DELAY BIT(0) /* Memory controller power down function */ #define MEM_POWER_DOWN BIT(8) /* Memory controller software reset */ #define MEM_SOFT_RESET BIT(0) /* Status values */ #define DCONSTAT_SCANINT 0 #define DCONSTAT_SCANINT_DCON 1 #define DCONSTAT_DISPLAYLOAD 2 #define DCONSTAT_MISSED 3 /* Source values */ #define DCON_SOURCE_DCON 0 #define DCON_SOURCE_CPU 1 /* Interrupt */ #define DCON_IRQ 6 struct dcon_priv { struct i2c_client *client; struct fb_info *fbinfo; struct backlight_device *bl_dev; wait_queue_head_t waitq; struct work_struct switch_source; struct notifier_block reboot_nb; /* Shadow register for the DCON_REG_MODE register */ u8 disp_mode; /* The current backlight value - this saves us some smbus traffic */ u8 bl_val; /* Current source, initialized at probe time */ int curr_src; /* Desired source */ int pending_src; /* Variables used during switches */ bool switched; ktime_t irq_time; ktime_t load_time; /* Current output type; true == mono, false == color */ bool mono; bool asleep; /* This get set while controlling fb blank state from the driver */ bool ignore_fb_events; }; struct dcon_platform_data { int (*init)(struct dcon_priv *dcon); void (*bus_stabilize_wiggle)(void); void (*set_dconload)(int load); int (*read_status)(u8 *status); }; #include <linux/interrupt.h> irqreturn_t dcon_interrupt(int irq, void *id); #ifdef CONFIG_FB_OLPC_DCON_1 extern struct dcon_platform_data dcon_pdata_xo_1; #endif #ifdef CONFIG_FB_OLPC_DCON_1_5 extern struct dcon_platform_data dcon_pdata_xo_1_5; #endif #endif