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