LXR linux/drivers/staging/olpc_dcon/olpc

   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   BIT(0)
  14#define MODE_SLEEP      BIT(1)
  15#define MODE_SLEEP_AUTO BIT(2)
  16#define MODE_BL_ENABLE  BIT(3)
  17#define MODE_BLANK      BIT(4)
  18#define MODE_CSWIZZLE   BIT(5)
  19#define MODE_COL_AA     BIT(6)
  20#define MODE_MONO_LUMA  BIT(7)
  21#define MODE_SCAN_INT   BIT(8)
  22#define MODE_CLOCKDIV   BIT(9)
  23#define MODE_DEBUG      BIT(14)
  24#define MODE_SELFTEST   BIT(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     BIT(0)
  40/* Memory controller power down function */
  41#define MEM_POWER_DOWN          BIT(8)
  42/* Memory controller software reset */
  43#define MEM_SOFT_RESET          BIT(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 *dcon);
  95        void (*bus_stabilize_wiggle)(void);
  96        void (*set_dconload)(int load);
  97        int (*read_status)(u8 *status);
  98};
  99
 100struct dcon_gpio {
 101        const char *name;
 102        unsigned long flags;
 103};
 104
 105#include <linux/interrupt.h>
 106
 107irqreturn_t dcon_interrupt(int irq, void *id);
 108
 109extern struct dcon_platform_data dcon_pdata_xo_1;
 110extern struct dcon_platform_data dcon_pdata_xo_1_5;
 111
 112#endif
 113