include/linux/wm97xx.h

   1
   2 /*
   3  * Register bits and API for Wolfson WM97xx series of codecs
   4  */
   5
   6 #ifndef _LINUX_WM97XX_H
   7 #define _LINUX_WM97XX_H
   8
   9 #include <sound/core.h>
  10 #include <sound/pcm.h>
  11 #include <sound/ac97_codec.h>
  12 #include <sound/initval.h>
  13 #include <linux/types.h>
  14 #include <linux/list.h>
  15 #include <linux/input.h>        /* Input device layer */
  16 #include <linux/platform_device.h>
  17
  18 /*
  19  * WM97xx variants
  20  */
  21 #define WM97xx_GENERIC                  0x0000
  22 #define WM97xx_WM1613                   0x1613
  23
  24 /*
  25  * WM97xx AC97 Touchscreen registers
  26  */
  27 #define AC97_WM97XX_DIGITISER1          0x76
  28 #define AC97_WM97XX_DIGITISER2          0x78
  29 #define AC97_WM97XX_DIGITISER_RD        0x7a
  30 #define AC97_WM9713_DIG1                0x74
  31 #define AC97_WM9713_DIG2                AC97_WM97XX_DIGITISER1
  32 #define AC97_WM9713_DIG3                AC97_WM97XX_DIGITISER2
  33
  34 /*
  35  * WM97xx register bits
  36  */
  37 #define WM97XX_POLL             0x8000  /* initiate a polling measurement */
  38 #define WM97XX_ADCSEL_X         0x1000  /* x coord measurement */
  39 #define WM97XX_ADCSEL_Y         0x2000  /* y coord measurement */
  40 #define WM97XX_ADCSEL_PRES      0x3000  /* pressure measurement */
  41 #define WM97XX_ADCSEL_MASK      0x7000
  42 #define WM97XX_COO              0x0800  /* enable coordinate mode */
  43 #define WM97XX_CTC              0x0400  /* enable continuous mode */
  44 #define WM97XX_CM_RATE_93       0x0000  /* 93.75Hz continuous rate */
  45 #define WM97XX_CM_RATE_187      0x0100  /* 187.5Hz continuous rate */
  46 #define WM97XX_CM_RATE_375      0x0200  /* 375Hz continuous rate */
  47 #define WM97XX_CM_RATE_750      0x0300  /* 750Hz continuous rate */
  48 #define WM97XX_CM_RATE_8K       0x00f0  /* 8kHz continuous rate */
  49 #define WM97XX_CM_RATE_12K      0x01f0  /* 12kHz continuous rate */
  50 #define WM97XX_CM_RATE_24K      0x02f0  /* 24kHz continuous rate */
  51 #define WM97XX_CM_RATE_48K      0x03f0  /* 48kHz continuous rate */
  52 #define WM97XX_CM_RATE_MASK     0x03f0
  53 #define WM97XX_RATE(i)          (((i & 3) << 8) | ((i & 4) ? 0xf0 : 0))
  54 #define WM97XX_DELAY(i)         ((i << 4) & 0x00f0)     /* sample delay times */
  55 #define WM97XX_DELAY_MASK       0x00f0
  56 #define WM97XX_SLEN             0x0008  /* slot read back enable */
  57 #define WM97XX_SLT(i)           ((i - 5) & 0x7) /* panel slot (5-11) */
  58 #define WM97XX_SLT_MASK         0x0007
  59 #define WM97XX_PRP_DETW         0x4000  /* detect on, digitise off, wake */
  60 #define WM97XX_PRP_DET          0x8000  /* detect on, digitise off, no wake */
  61 #define WM97XX_PRP_DET_DIG      0xc000  /* setect on, digitise on */
  62 #define WM97XX_RPR              0x2000  /* wake up on pen down */
  63 #define WM97XX_PEN_DOWN         0x8000  /* pen is down */
  64 #define WM97XX_ADCSRC_MASK      0x7000  /* ADC source mask */
  65
  66 #define WM97XX_AUX_ID1          0x8001
  67 #define WM97XX_AUX_ID2          0x8002
  68 #define WM97XX_AUX_ID3          0x8003
  69 #define WM97XX_AUX_ID4          0x8004
  70
  71
  72 /* WM9712 Bits */
  73 #define WM9712_45W              0x1000  /* set for 5-wire touchscreen */
  74 #define WM9712_PDEN             0x0800  /* measure only when pen down */
  75 #define WM9712_WAIT             0x0200  /* wait until adc is read before next sample */
  76 #define WM9712_PIL              0x0100  /* current used for pressure measurement. set 400uA else 200uA */
  77 #define WM9712_MASK_HI          0x0040  /* hi on mask pin (47) stops conversions */
  78 #define WM9712_MASK_EDGE        0x0080  /* rising/falling edge on pin delays sample */
  79 #define WM9712_MASK_SYNC        0x00c0  /* rising/falling edge on mask initiates sample */
  80 #define WM9712_RPU(i)           (i&0x3f)        /* internal pull up on pen detect (64k / rpu) */
  81 #define WM9712_PD(i)            (0x1 << i)      /* power management */
  82
  83 /* WM9712 Registers */
  84 #define AC97_WM9712_POWER       0x24
  85 #define AC97_WM9712_REV         0x58
  86
  87 /* WM9705 Bits */
  88 #define WM9705_PDEN             0x1000  /* measure only when pen is down */
  89 #define WM9705_PINV             0x0800  /* inverts sense of pen down output */
  90 #define WM9705_BSEN             0x0400  /* BUSY flag enable, pin47 is 1 when busy */
  91 #define WM9705_BINV             0x0200  /* invert BUSY (pin47) output */
  92 #define WM9705_WAIT             0x0100  /* wait until adc is read before next sample */
  93 #define WM9705_PIL              0x0080  /* current used for pressure measurement. set 400uA else 200uA */
  94 #define WM9705_PHIZ             0x0040  /* set PHONE and PCBEEP inputs to high impedance */
  95 #define WM9705_MASK_HI          0x0010  /* hi on mask stops conversions */
  96 #define WM9705_MASK_EDGE        0x0020  /* rising/falling edge on pin delays sample */
  97 #define WM9705_MASK_SYNC        0x0030  /* rising/falling edge on mask initiates sample */
  98 #define WM9705_PDD(i)           (i & 0x000f)    /* pen detect comparator threshold */
  99
 100
 101 /* WM9713 Bits */
 102 #define WM9713_PDPOL            0x0400  /* Pen down polarity */
 103 #define WM9713_POLL             0x0200  /* initiate a polling measurement */
 104 #define WM9713_CTC              0x0100  /* enable continuous mode */
 105 #define WM9713_ADCSEL_X         0x0002  /* X measurement */
 106 #define WM9713_ADCSEL_Y         0x0004  /* Y measurement */
 107 #define WM9713_ADCSEL_PRES      0x0008  /* Pressure measurement */
 108 #define WM9713_COO              0x0001  /* enable coordinate mode */
 109 #define WM9713_45W              0x1000  /* set for 5 wire panel */
 110 #define WM9713_PDEN             0x0800  /* measure only when pen down */
 111 #define WM9713_ADCSEL_MASK      0x00fe  /* ADC selection mask */
 112 #define WM9713_WAIT             0x0200  /* coordinate wait */
 113
 114 /* AUX ADC ID's */
 115 #define TS_COMP1                0x0
 116 #define TS_COMP2                0x1
 117 #define TS_BMON                 0x2
 118 #define TS_WIPER                0x3
 119
 120 /* ID numbers */
 121 #define WM97XX_ID1              0x574d
 122 #define WM9712_ID2              0x4c12
 123 #define WM9705_ID2              0x4c05
 124 #define WM9713_ID2              0x4c13
 125
 126 /* Codec GPIO's */
 127 #define WM97XX_MAX_GPIO         16
 128 #define WM97XX_GPIO_1           (1 << 1)
 129 #define WM97XX_GPIO_2           (1 << 2)
 130 #define WM97XX_GPIO_3           (1 << 3)
 131 #define WM97XX_GPIO_4           (1 << 4)
 132 #define WM97XX_GPIO_5           (1 << 5)
 133 #define WM97XX_GPIO_6           (1 << 6)
 134 #define WM97XX_GPIO_7           (1 << 7)
 135 #define WM97XX_GPIO_8           (1 << 8)
 136 #define WM97XX_GPIO_9           (1 << 9)
 137 #define WM97XX_GPIO_10          (1 << 10)
 138 #define WM97XX_GPIO_11          (1 << 11)
 139 #define WM97XX_GPIO_12          (1 << 12)
 140 #define WM97XX_GPIO_13          (1 << 13)
 141 #define WM97XX_GPIO_14          (1 << 14)
 142 #define WM97XX_GPIO_15          (1 << 15)
 143
 144
 145 #define AC97_LINK_FRAME         21      /* time in uS for AC97 link frame */
 146
 147
 148 /*---------------- Return codes from sample reading functions ---------------*/
 149
 150 /* More data is available; call the sample gathering function again */
 151 #define RC_AGAIN                        0x00000001
 152 /* The returned sample is valid */
 153 #define RC_VALID                        0x00000002
 154 /* The pen is up (the first RC_VALID without RC_PENUP means pen is down) */
 155 #define RC_PENUP                        0x00000004
 156 /* The pen is down (RC_VALID implies RC_PENDOWN, but sometimes it is helpful
 157    to tell the handler that the pen is down but we don't know yet his coords,
 158    so the handler should not sleep or wait for pendown irq) */
 159 #define RC_PENDOWN                      0x00000008
 160
 161 /*
 162  * The wm97xx driver provides a private API for writing platform-specific
 163  * drivers.
 164  */
 165
 166 /* The structure used to return arch specific sampled data into */
 167 struct wm97xx_data {
 168     int x;
 169     int y;
 170     int p;
 171 };
 172
 173 /*
 174  * Codec GPIO status
 175  */
 176 enum wm97xx_gpio_status {
 177     WM97XX_GPIO_HIGH,
 178     WM97XX_GPIO_LOW
 179 };
 180
 181 /*
 182  * Codec GPIO direction
 183  */
 184 enum wm97xx_gpio_dir {
 185     WM97XX_GPIO_IN,
 186     WM97XX_GPIO_OUT
 187 };
 188
 189 /*
 190  * Codec GPIO polarity
 191  */
 192 enum wm97xx_gpio_pol {
 193     WM97XX_GPIO_POL_HIGH,
 194     WM97XX_GPIO_POL_LOW
 195 };
 196
 197 /*
 198  * Codec GPIO sticky
 199  */
 200 enum wm97xx_gpio_sticky {
 201     WM97XX_GPIO_STICKY,
 202     WM97XX_GPIO_NOTSTICKY
 203 };
 204
 205 /*
 206  * Codec GPIO wake
 207  */
 208 enum wm97xx_gpio_wake {
 209     WM97XX_GPIO_WAKE,
 210     WM97XX_GPIO_NOWAKE
 211 };
 212
 213 /*
 214  * Digitiser ioctl commands
 215  */
 216 #define WM97XX_DIG_START        0x1
 217 #define WM97XX_DIG_STOP         0x2
 218 #define WM97XX_PHY_INIT         0x3
 219 #define WM97XX_AUX_PREPARE      0x4
 220 #define WM97XX_DIG_RESTORE      0x5
 221
 222 struct wm97xx;
 223
 224 extern struct wm97xx_codec_drv wm9705_codec;
 225 extern struct wm97xx_codec_drv wm9712_codec;
 226 extern struct wm97xx_codec_drv wm9713_codec;
 227
 228 /*
 229  * Codec driver interface - allows mapping to WM9705/12/13 and newer codecs
 230  */
 231 struct wm97xx_codec_drv {
 232         u16 id;
 233         char *name;
 234
 235         /* read 1 sample */
 236         int (*poll_sample) (struct wm97xx *, int adcsel, int *sample);
 237
 238         /* read X,Y,[P] in poll */
 239         int (*poll_touch) (struct wm97xx *, struct wm97xx_data *);
 240
 241         int (*acc_enable) (struct wm97xx *, int enable);
 242         void (*phy_init) (struct wm97xx *);
 243         void (*dig_enable) (struct wm97xx *, int enable);
 244         void (*dig_restore) (struct wm97xx *);
 245         void (*aux_prepare) (struct wm97xx *);
 246 };
 247
 248
 249 /* Machine specific and accelerated touch operations */
 250 struct wm97xx_mach_ops {
 251
 252         /* accelerated touch readback - coords are transmited on AC97 link */
 253         int acc_enabled;
 254         void (*acc_pen_up) (struct wm97xx *);
 255         int (*acc_pen_down) (struct wm97xx *);
 256         int (*acc_startup) (struct wm97xx *);
 257         void (*acc_shutdown) (struct wm97xx *);
 258
 259         /* interrupt mask control - required for accelerated operation */
 260         void (*irq_enable) (struct wm97xx *, int enable);
 261
 262         /* GPIO pin used for accelerated operation */
 263         int irq_gpio;
 264
 265         /* pre and post sample - can be used to minimise any analog noise */
 266         void (*pre_sample) (int);  /* function to run before sampling */
 267         void (*post_sample) (int);  /* function to run after sampling */
 268 };
 269
 270 struct wm97xx {
 271         u16 dig[3], id, gpio[6], misc;  /* Cached codec registers */
 272         u16 dig_save[3];                /* saved during aux reading */
 273         struct wm97xx_codec_drv *codec; /* attached codec driver*/
 274         struct input_dev *input_dev;    /* touchscreen input device */
 275         struct snd_ac97 *ac97;          /* ALSA codec access */
 276         struct device *dev;             /* ALSA device */
 277         struct platform_device *battery_dev;
 278         struct platform_device *touch_dev;
 279         struct wm97xx_mach_ops *mach_ops;
 280         struct mutex codec_mutex;
 281         struct delayed_work ts_reader;  /* Used to poll touchscreen */
 282         unsigned long ts_reader_interval; /* Current interval for timer */
 283         unsigned long ts_reader_min_interval; /* Minimum interval */
 284         unsigned int pen_irq;           /* Pen IRQ number in use */
 285         struct workqueue_struct *ts_workq;
 286         struct work_struct pen_event_work;
 287         u16 acc_slot;                   /* AC97 slot used for acc touch data */
 288         u16 acc_rate;                   /* acc touch data rate */
 289         unsigned pen_is_down:1;         /* Pen is down */
 290         unsigned aux_waiting:1;         /* aux measurement waiting */
 291         unsigned pen_probably_down:1;   /* used in polling mode */
 292         u16 variant;                    /* WM97xx chip variant */
 293         u16 suspend_mode;               /* PRP in suspend mode */
 294 };
 295
 296 struct wm97xx_batt_pdata {
 297         int     batt_aux;
 298         int     temp_aux;
 299         int     charge_gpio;
 300         int     min_voltage;
 301         int     max_voltage;
 302         int     batt_div;
 303         int     batt_mult;
 304         int     temp_div;
 305         int     temp_mult;
 306         int     batt_tech;
 307         char    *batt_name;
 308 };
 309
 310 struct wm97xx_pdata {
 311         struct wm97xx_batt_pdata        *batt_pdata;    /* battery data */
 312 };
 313
 314 /*
 315  * Codec GPIO access (not supported on WM9705)
 316  * This can be used to set/get codec GPIO and Virtual GPIO status.
 317  */
 318 enum wm97xx_gpio_status wm97xx_get_gpio(struct wm97xx *wm, u32 gpio);
 319 void wm97xx_set_gpio(struct wm97xx *wm, u32 gpio,
 320                           enum wm97xx_gpio_status status);
 321 void wm97xx_config_gpio(struct wm97xx *wm, u32 gpio,
 322                                      enum wm97xx_gpio_dir dir,
 323                                      enum wm97xx_gpio_pol pol,
 324                                      enum wm97xx_gpio_sticky sticky,
 325                                      enum wm97xx_gpio_wake wake);
 326
 327 void wm97xx_set_suspend_mode(struct wm97xx *wm, u16 mode);
 328
 329 /* codec AC97 IO access */
 330 int wm97xx_reg_read(struct wm97xx *wm, u16 reg);
 331 void wm97xx_reg_write(struct wm97xx *wm, u16 reg, u16 val);
 332
 333 /* aux adc readback */
 334 int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel);
 335
 336 /* machine ops */
 337 int wm97xx_register_mach_ops(struct wm97xx *, struct wm97xx_mach_ops *);
 338 void wm97xx_unregister_mach_ops(struct wm97xx *);
 339
 340 #endif