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