1 /* 2 * ac97.h 3 * 4 * definitions for the AC97, Intel's Audio Codec 97 Spec 5 * also includes support for a generic AC97 interface 6 */ 7 8 #ifndef _AC97_H_ 9 #define _AC97_H_ 10 #include "sound_config.h" 11 #include "sound_calls.h" 12 13 #define AC97_RESET 0x0000 // 14 #define AC97_MASTER_VOL_STEREO 0x0002 // Line Out 15 #define AC97_HEADPHONE_VOL 0x0004 // 16 #define AC97_MASTER_VOL_MONO 0x0006 // TAD Output 17 #define AC97_MASTER_TONE 0x0008 // 18 #define AC97_PCBEEP_VOL 0x000a // none 19 #define AC97_PHONE_VOL 0x000c // TAD Input (mono) 20 #define AC97_MIC_VOL 0x000e // MIC Input (mono) 21 #define AC97_LINEIN_VOL 0x0010 // Line Input (stereo) 22 #define AC97_CD_VOL 0x0012 // CD Input (stereo) 23 #define AC97_VIDEO_VOL 0x0014 // none 24 #define AC97_AUX_VOL 0x0016 // Aux Input (stereo) 25 #define AC97_PCMOUT_VOL 0x0018 // Wave Output (stereo) 26 #define AC97_RECORD_SELECT 0x001a // 27 #define AC97_RECORD_GAIN 0x001c 28 #define AC97_RECORD_GAIN_MIC 0x001e 29 #define AC97_GENERAL_PURPOSE 0x0020 30 #define AC97_3D_CONTROL 0x0022 31 #define AC97_MODEM_RATE 0x0024 32 #define AC97_POWER_CONTROL 0x0026 33 34 /* registers 0x0028 - 0x0058 are reserved */ 35 36 /* AC'97 2.0 */ 37 #define AC97_EXTENDED_ID 0x0028 /* Extended Audio ID */ 38 #define AC97_EXTENDED_STATUS 0x002A /* Extended Audio Status */ 39 #define AC97_PCM_FRONT_DAC_RATE 0x002C /* PCM Front DAC Rate */ 40 #define AC97_PCM_SURR_DAC_RATE 0x002E /* PCM Surround DAC Rate */ 41 #define AC97_PCM_LFE_DAC_RATE 0x0030 /* PCM LFE DAC Rate */ 42 #define AC97_PCM_LR_ADC_RATE 0x0032 /* PCM LR DAC Rate */ 43 #define AC97_PCM_MIC_ADC_RATE 0x0034 /* PCM MIC ADC Rate */ 44 #define AC97_CENTER_LFE_MASTER 0x0036 /* Center + LFE Master Volume */ 45 #define AC97_SURROUND_MASTER 0x0038 /* Surround (Rear) Master Volume */ 46 #define AC97_RESERVED_3A 0x003A /* Reserved */ 47 /* range 0x3c-0x58 - MODEM */ 48 49 /* registers 0x005a - 0x007a are vendor reserved */ 50 51 #define AC97_VENDOR_ID1 0x007c 52 #define AC97_VENDOR_ID2 0x007e 53 54 /* volume control bit defines */ 55 56 #define AC97_MUTE 0x8000 57 #define AC97_MICBOOST 0x0040 58 #define AC97_LEFTVOL 0x3f00 59 #define AC97_RIGHTVOL 0x003f 60 61 /* record mux defines */ 62 63 #define AC97_RECMUX_MIC 0x0000 64 #define AC97_RECMUX_CD 0x0101 65 #define AC97_RECMUX_VIDEO 0x0202 /* not used */ 66 #define AC97_RECMUX_AUX 0x0303 67 #define AC97_RECMUX_LINE 0x0404 68 #define AC97_RECMUX_STEREO_MIX 0x0505 69 #define AC97_RECMUX_MONO_MIX 0x0606 70 #define AC97_RECMUX_PHONE 0x0707 71 72 73 /* general purpose register bit defines */ 74 75 #define AC97_GP_LPBK 0x0080 /* Loopback mode */ 76 #define AC97_GP_MS 0x0100 /* Mic Select 0=Mic1, 1=Mic2 */ 77 #define AC97_GP_MIX 0x0200 /* Mono output select 0=Mix, 1=Mic */ 78 #define AC97_GP_RLBK 0x0400 /* Remote Loopback - Modem line codec */ 79 #define AC97_GP_LLBK 0x0800 /* Local Loopback - Modem Line codec */ 80 #define AC97_GP_LD 0x1000 /* Loudness 1=on */ 81 #define AC97_GP_3D 0x2000 /* 3D Enhancement 1=on */ 82 #define AC97_GP_ST 0x4000 /* Stereo Enhancement 1=on */ 83 #define AC97_GP_POP 0x8000 /* Pcm Out Path, 0=pre 3D, 1=post 3D */ 84 85 86 /* powerdown control and status bit defines */ 87 88 /* status */ 89 #define AC97_PWR_MDM 0x0010 /* Modem section ready */ 90 #define AC97_PWR_REF 0x0008 /* Vref nominal */ 91 #define AC97_PWR_ANL 0x0004 /* Analog section ready */ 92 #define AC97_PWR_DAC 0x0002 /* DAC section ready */ 93 #define AC97_PWR_ADC 0x0001 /* ADC section ready */ 94 95 /* control */ 96 #define AC97_PWR_PR0 0x0100 /* ADC and Mux powerdown */ 97 #define AC97_PWR_PR1 0x0200 /* DAC powerdown */ 98 #define AC97_PWR_PR2 0x0400 /* Output mixer powerdown (Vref on) */ 99 #define AC97_PWR_PR3 0x0800 /* Output mixer powerdown (Vref off) */ 100 #define AC97_PWR_PR4 0x1000 /* AC-link powerdown */ 101 #define AC97_PWR_PR5 0x2000 /* Internal Clk disable */ 102 #define AC97_PWR_PR6 0x4000 /* HP amp powerdown */ 103 #define AC97_PWR_PR7 0x8000 /* Modem off - if supported */ 104 105 /* useful power states */ 106 #define AC97_PWR_D0 0x0000 /* everything on */ 107 #define AC97_PWR_D1 AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR4 108 #define AC97_PWR_D2 AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4 109 #define AC97_PWR_D3 AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4 110 #define AC97_PWR_ANLOFF AC97_PWR_PR2|AC97_PWR_PR3 /* analog section off */ 111 112 /* Total number of defined registers. */ 113 #define AC97_REG_CNT 64 114 115 /* Generic AC97 mixer interface. */ 116 117 /* Structure describing access to the hardware. */ 118 struct ac97_hwint 119 { 120 /* Perform any hardware-specific reset and initialization. Returns 121 0 on success, or a negative error code. */ 122 int (*reset_device) (struct ac97_hwint *dev); 123 124 /* Returns the contents of the specified register REG. The caller 125 should check to see if the desired contents are available in 126 the cache first, if applicable. Returns a positive unsigned value 127 representing the contents of the register, or a negative error 128 code. */ 129 int (*read_reg) (struct ac97_hwint *dev, u8 reg); 130 131 /* Writes VALUE to register REG. Returns 0 on success, or a 132 negative error code. */ 133 int (*write_reg) (struct ac97_hwint *dev, u8 reg, u16 value); 134 135 /* Hardware-specific information. */ 136 void *driver_private; 137 138 /* Three OSS masks. */ 139 int mixer_devmask; 140 int mixer_stereomask; 141 int mixer_recmask; 142 143 /* The mixer cache. The indices correspond to the AC97 hardware register 144 number / 2, since the register numbers are always an even number. 145 146 Unknown values are set to -1; unsupported registers contain a 147 -2. */ 148 int last_written_mixer_values[AC97_REG_CNT]; 149 150 /* A cache of values written via OSS; we need these so we can return 151 the values originally written by the user. 152 153 Why the original user values? Because the real-world hardware 154 has less precision, and some existing applications assume that 155 they will get back the exact value that they wrote (aumix). 156 157 A -1 value indicates that no value has been written to this mixer 158 channel via OSS. */ 159 int last_written_OSS_values[SOUND_MIXER_NRDEVICES]; 160 }; 161 162 /* Values stored in the register cache. */ 163 #define AC97_REGVAL_UNKNOWN -1 164 #define AC97_REG_UNSUPPORTED -2 165 166 struct ac97_mixer_value_list 167 { 168 /* Mixer channel to set. List is terminated by a value of -1. */ 169 int oss_channel; 170 /* The scaled value to set it to; values generally range from 0-100. */ 171 union { 172 struct { 173 u8 left, right; 174 } stereo; 175 u8 mono; 176 } value; 177 }; 178 179 /* Initialize the ac97 mixer by resetting it. */ 180 extern int ac97_init (struct ac97_hwint *dev); 181 182 /* Sets the mixer DEV to the values in VALUE_LIST. Returns 0 on success, 183 or a negative error code. */ 184 extern int ac97_set_values (struct ac97_hwint *dev, 185 struct ac97_mixer_value_list *value_list); 186 187 /* Sets one mixer channel OSS_CHANNEL to the scaled value OSS_VALUE. 188 Returns the resulting (rescaled) value, or a negative value 189 representing an error code. 190 191 Stereo channels have two values in OSS_VALUE (the left value is in the 192 lower 8 bits, the right value is in the upper 8 bits). */ 193 extern int ac97_set_mixer (struct ac97_hwint *dev, int oss_channel, 194 u16 oss_value); 195 196 /* Return the contents of the specified AC97 register REG; it uses the 197 last-written value if it is available. */ 198 extern int ac97_get_register (struct ac97_hwint *dev, u8 reg); 199 200 /* Writes the specified VALUE to the AC97 register REG in the mixer. 201 Takes care of setting the last-written cache as well. */ 202 extern int ac97_put_register (struct ac97_hwint *dev, u8 reg, u16 value); 203 204 /* Returns the last OSS value written to the OSS_CHANNEL mixer channel. */ 205 extern int ac97_get_mixer_scaled (struct ac97_hwint *dev, int oss_channel); 206 207 /* Default ioctl. */ 208 extern int ac97_mixer_ioctl (struct ac97_hwint *dev, unsigned int cmd, 209 caddr_t arg); 210 211 /* Do a complete reset on the AC97 mixer, restoring all mixer registers to 212 the current values. Normally used after an APM resume event. */ 213 extern int ac97_reset (struct ac97_hwint *dev); 214 #endif 215 216 /* 217 * Local variables: 218 * c-basic-offset: 4 219 * End: 220 */ 221