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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [sound/] [lowlevel/] [aci.c] - Rev 1765
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/* * Audio Command Interface (ACI) driver (sound/aci.c) * * ACI is a protocol used to communicate with the microcontroller on * some sound cards produced by miro, e.g. the miroSOUND PCM12 and * PCM20. The ACI has been developed for miro by Norberto Pellicci * <pellicci@ix.netcom.com>. Special thanks to both him and miro for * providing the ACI specification. * * The main function of the ACI is to control the mixer and to get a * product identification. On the PCM20, ACI also controls the radio * tuner on this card, however this is not yet supported in this * software. * * This Voxware ACI driver currently only supports the ACI functions * on the miroSOUND PCM12 card. Support for miro soundcards with * additional ACI functions can easily be added later. * * Revision history: * * 1995-11-10 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de> * First version written. * 1995-12-31 Markus Kuhn * Second revision, general code cleanup. * 1996-05-16 Hannu Savolainen * Integrated with other parts of the driver. * 1996-05-28 Markus Kuhn * Initialize CS4231A mixer, make ACI first mixer, * use new private mixer API for solo mode. */ /* * Some driver specific information and features: * * This mixer driver identifies itself to applications as "ACI" in * mixer_info.id as retrieved by ioctl(fd, SOUND_MIXER_INFO, &mixer_info). * * Proprietary mixer features that go beyond the standard USS mixer * interface are: * * Full duplex solo configuration: * * int solo_mode; * ioctl(fd, SOUND_MIXER_PRIVATE1, &solo_mode); * * solo_mode = 0: deactivate solo mode (default) * solo_mode > 0: activate solo mode * With activated solo mode, the PCM input can not any * longer hear the signals produced by the PCM output. * Activating solo mode is important in duplex mode in order * to avoid feedback distortions. * solo_mode < 0: do not change solo mode (just retrieve the status) * * When the ioctl() returns 0, solo_mode contains the previous * status (0 = deactivated, 1 = activated). If solo mode is not * implemented on this card, ioctl() returns -1 and sets errno to * EINVAL. * */ #include <linux/config.h> /* CONFIG_ACI_MIXER */ #include "../sound_config.h" #ifdef CONFIG_ACI_MIXER #undef DEBUG /* if defined, produce a verbose report via syslog */ int aci_port = 0x354; /* as determined by bit 4 in the OPTi 929 MC4 register */ unsigned char aci_idcode[2] = {0, 0}; /* manufacturer and product ID */ unsigned char aci_version = 0; /* ACI firmware version */ int aci_solo; /* status bit of the card that can't be * * checked with ACI versions prior to 0xb0 */ static int aci_present = 0; #define COMMAND_REGISTER (aci_port) #define STATUS_REGISTER (aci_port + 1) #define BUSY_REGISTER (aci_port + 2) /* * Wait until the ACI microcontroller has set the READYFLAG in the * Busy/IRQ Source Register to 0. This is required to avoid * overrunning the soundcard microcontroller. We do a busy wait here, * because the microcontroller is not supposed to signal a busy * condition for more than a few clock cycles. In case of a time-out, * this function returns -1. * * This busy wait code normally requires less than 15 loops and * practically always less than 100 loops on my i486/DX2 66 MHz. * * Warning: Waiting on the general status flag after reseting the MUTE * function can take a VERY long time, because the PCM12 does some kind * of fade-in effect. For this reason, access to the MUTE function has * not been implemented at all. */ static int busy_wait(void) { long timeout; for (timeout = 0; timeout < 10000000L; timeout++) if ((inb_p(BUSY_REGISTER) & 1) == 0) return 0; #ifdef DEBUG printk("ACI: READYFLAG timed out.\n"); #endif return -1; } /* * Read the GENERAL STATUS register. */ static int read_general_status(void) { unsigned long flags; int status; save_flags(flags); cli(); if (busy_wait()) { restore_flags(flags); return -1; } status = (unsigned) inb_p(STATUS_REGISTER); restore_flags(flags); return status; } /* * The four ACI command types (implied, write, read and indexed) can * be sent to the microcontroller using the following four functions. * If a problem occurred, they return -1. */ static int implied_cmd(unsigned char opcode) { unsigned long flags; #ifdef DEBUG printk("ACI: implied_cmd(0x%02x)\n", opcode); #endif save_flags(flags); cli(); if (read_general_status() < 0 || busy_wait()) { restore_flags(flags); return -1; } outb_p(opcode, COMMAND_REGISTER); restore_flags(flags); return 0; } static int write_cmd(unsigned char opcode, unsigned char parameter) { unsigned long flags; int status; #ifdef DEBUG printk("ACI: write_cmd(0x%02x, 0x%02x)\n", opcode, parameter); #endif save_flags(flags); cli(); if (read_general_status() < 0 || busy_wait()) { restore_flags(flags); return -1; } outb_p(opcode, COMMAND_REGISTER); if (busy_wait()) { restore_flags(flags); return -1; } outb_p(parameter, COMMAND_REGISTER); if ((status = read_general_status()) < 0) { restore_flags(flags); return -1; } /* polarity of the INVALID flag depends on ACI version */ if ((aci_version < 0xb0 && (status & 0x40) != 0) || (aci_version >= 0xb0 && (status & 0x40) == 0)) { restore_flags(flags); printk("ACI: invalid write command 0x%02x, 0x%02x.\n", opcode, parameter); return -1; } restore_flags(flags); return 0; } static int read_cmd(unsigned char opcode, int length, unsigned char *parameter) { unsigned long flags; int i = 0; save_flags(flags); cli(); if (read_general_status() < 0) { restore_flags(flags); return -1; } while (i < length) { if (busy_wait()) { restore_flags(flags); return -1; } outb_p(opcode, COMMAND_REGISTER); if (busy_wait()) { restore_flags(flags); return -1; } parameter[i++] = inb_p(STATUS_REGISTER); #ifdef DEBUG if (i == 1) printk("ACI: read_cmd(0x%02x, %d) = 0x%02x\n", opcode, length, parameter[i-1]); else printk("ACI: read_cmd cont.: 0x%02x\n", parameter[i-1]); #endif } restore_flags(flags); return 0; } static int indexed_cmd(unsigned char opcode, unsigned char index, unsigned char *parameter) { unsigned long flags; save_flags(flags); cli(); if (read_general_status() < 0 || busy_wait()) { restore_flags(flags); return -1; } outb_p(opcode, COMMAND_REGISTER); if (busy_wait()) { restore_flags(flags); return -1; } outb_p(index, COMMAND_REGISTER); if (busy_wait()) { restore_flags(flags); return -1; } *parameter = inb_p(STATUS_REGISTER); #ifdef DEBUG printk("ACI: indexed_cmd(0x%02x, 0x%02x) = 0x%02x\n", opcode, index, *parameter); #endif restore_flags(flags); return 0; } /* * The following macro SCALE can be used to scale one integer volume * value into another one using only integer arithmetic. If the input * value x is in the range 0 <= x <= xmax, then the result will be in * the range 0 <= SCALE(xmax,ymax,x) <= ymax. * * This macro has for all xmax, ymax > 0 and all 0 <= x <= xmax the * following nice properties: * * - SCALE(xmax,ymax,xmax) = ymax * - SCALE(xmax,ymax,0) = 0 * - SCALE(xmax,ymax,SCALE(ymax,xmax,SCALE(xmax,ymax,x))) = SCALE(xmax,ymax,x) * * In addition, the rounding error is minimal and nicely distributed. * The proofs are left as an exercise to the reader. */ #define SCALE(xmax,ymax,x) (((x)*(ymax)+(xmax)/2)/(xmax)) static int getvolume(caddr_t arg, unsigned char left_index, unsigned char right_index) { int vol; unsigned char buf; /* left channel */ if (indexed_cmd(0xf0, left_index, &buf)) return -EIO; vol = SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0); /* right channel */ if (indexed_cmd(0xf0, right_index, &buf)) return -EIO; vol |= SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0) << 8; return snd_ioctl_return((int *) arg, vol); } static int setvolume(caddr_t arg, unsigned char left_index, unsigned char right_index) { int vol, ret; unsigned param; param = get_user((int *) arg); /* left channel */ vol = param & 0xff; if (vol > 100) vol = 100; vol = SCALE(100, 0x20, vol); if (write_cmd(left_index, 0x20 - vol)) return -EIO; ret = SCALE(0x20, 100, vol); /* right channel */ vol = (param >> 8) & 0xff; if (vol > 100) vol = 100; vol = SCALE(100, 0x20, vol); if (write_cmd(right_index, 0x20 - vol)) return -EIO; ret |= SCALE(0x20, 100, vol) << 8; return snd_ioctl_return((int *) arg, ret); } static int aci_mixer_ioctl (int dev, unsigned int cmd, caddr_t arg) { int status, vol; unsigned char buf; /* handle solo mode control */ if (cmd == SOUND_MIXER_PRIVATE1) { if (get_user((int *) arg) >= 0) { aci_solo = !!get_user((int *) arg); if (write_cmd(0xd2, aci_solo)) return -EIO; } else if (aci_version >= 0xb0) { if ((status = read_general_status()) < 0) return -EIO; return snd_ioctl_return ((int *) arg, (status & 0x20) == 0); } return snd_ioctl_return((int *) arg, aci_solo); } if (((cmd >> 8) & 0xff) == 'M') { if (cmd & IOC_IN) /* read and write */ switch (cmd & 0xff) { case SOUND_MIXER_VOLUME: return setvolume(arg, 0x01, 0x00); case SOUND_MIXER_CD: return setvolume(arg, 0x3c, 0x34); case SOUND_MIXER_MIC: return setvolume(arg, 0x38, 0x30); case SOUND_MIXER_LINE: return setvolume(arg, 0x39, 0x31); case SOUND_MIXER_SYNTH: return setvolume(arg, 0x3b, 0x33); case SOUND_MIXER_PCM: return setvolume(arg, 0x3a, 0x32); case SOUND_MIXER_LINE1: /* AUX1 */ return setvolume(arg, 0x3d, 0x35); case SOUND_MIXER_LINE2: /* AUX2 */ return setvolume(arg, 0x3e, 0x36); case SOUND_MIXER_IGAIN: /* MIC pre-amp */ vol = get_user((int *) arg) & 0xff; if (vol > 100) vol = 100; vol = SCALE(100, 3, vol); if (write_cmd(0x03, vol)) return -EIO; vol = SCALE(3, 100, vol); return snd_ioctl_return((int *) arg, vol | (vol << 8)); case SOUND_MIXER_RECSRC: return snd_ioctl_return ((int *) arg, 0); break; default: return -EINVAL; } else /* only read */ switch (cmd & 0xff) { case SOUND_MIXER_DEVMASK: return snd_ioctl_return ((int *) arg, SOUND_MASK_VOLUME | SOUND_MASK_CD | SOUND_MASK_MIC | SOUND_MASK_LINE | SOUND_MASK_SYNTH | SOUND_MASK_PCM | #if 0 SOUND_MASK_IGAIN | #endif SOUND_MASK_LINE1 | SOUND_MASK_LINE2); break; case SOUND_MIXER_STEREODEVS: return snd_ioctl_return ((int *) arg, SOUND_MASK_VOLUME | SOUND_MASK_CD | SOUND_MASK_MIC | SOUND_MASK_LINE | SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE1 | SOUND_MASK_LINE2); break; case SOUND_MIXER_RECMASK: return snd_ioctl_return ((int *) arg, 0); break; case SOUND_MIXER_RECSRC: return snd_ioctl_return ((int *) arg, 0); break; case SOUND_MIXER_CAPS: return snd_ioctl_return ((int *) arg, 0); break; case SOUND_MIXER_VOLUME: return getvolume(arg, 0x04, 0x03); case SOUND_MIXER_CD: return getvolume(arg, 0x0a, 0x09); case SOUND_MIXER_MIC: return getvolume(arg, 0x06, 0x05); case SOUND_MIXER_LINE: return getvolume(arg, 0x08, 0x07); case SOUND_MIXER_SYNTH: return getvolume(arg, 0x0c, 0x0b); case SOUND_MIXER_PCM: return getvolume(arg, 0x0e, 0x0d); case SOUND_MIXER_LINE1: /* AUX1 */ return getvolume(arg, 0x11, 0x10); case SOUND_MIXER_LINE2: /* AUX2 */ return getvolume(arg, 0x13, 0x12); case SOUND_MIXER_IGAIN: /* MIC pre-amp */ if (indexed_cmd(0xf0, 0x21, &buf)) return -EIO; vol = SCALE(3, 100, buf <= 3 ? buf : 3); vol |= vol << 8; return snd_ioctl_return((int *) arg, vol); default: return -EINVAL; } } return -EINVAL; } static struct mixer_operations aci_mixer_operations = { "ACI", "ACI mixer", aci_mixer_ioctl, NULL }; static unsigned char mad_read (int port) { outb (0xE3, 0xf8f); /* Write MAD16 password */ return inb (port); /* Read from port */ } /* * Check, whether there actually is any ACI port operational and if * one was found, then initialize the ACI interface, reserve the I/O * addresses and attach the new mixer to the relevant VoxWare data * structures. * * Returns: 1 ACI mixer detected * 0 nothing there * * There is also an internal mixer in the codec (CS4231A or AD1845), * that deserves no purpose in an ACI based system which uses an * external ACI controlled stereo mixer. Make sure that this codec * mixer has the AUX1 input selected as the recording source, that the * input gain is set near maximum and that the other channels going * from the inputs to the codec output are muted. */ int attach_aci(void) { char *boardname = "unknown"; int volume; #define MC4_PORT 0xf90 aci_port = (mad_read(MC4_PORT) & 0x10) ? 0x344 : 0x354; if (check_region(aci_port, 3)) { #ifdef DEBUG printk("ACI: I/O area 0x%03x-0x%03x already used.\n", aci_port, aci_port+2); #endif return 0; } if (read_cmd(0xf2, 2, aci_idcode)) { #ifdef DEBUG printk("ACI: Failed to read idcode.\n"); #endif return 0; } if (read_cmd(0xf1, 1, &aci_version)) { #ifdef DEBUG printk("ACI: Failed to read version.\n"); #endif return 0; } if (aci_idcode[0] == 0x6d) { /* it looks like a miro soundcard */ switch (aci_idcode[1]) { case 0x41: boardname = "PCM1 pro / early PCM12"; break; case 0x42: boardname = "PCM12"; break; case 0x43: boardname = "PCM20"; break; default: boardname = "unknown miro"; } } else #ifndef DEBUG return 0; #endif printk("<ACI %02x, id %02x %02x (%s)> at 0x%03x\n", aci_version, aci_idcode[0], aci_idcode[1], boardname, aci_port); /* initialize ACI mixer */ implied_cmd(0xff); aci_solo = 0; /* attach the mixer */ request_region(aci_port, 3, "sound mixer (ACI)"); if (num_mixers < MAX_MIXER_DEV) { if (num_mixers > 0 && !strcmp("MAD16 WSS (CS4231A)", mixer_devs[num_mixers-1]->name)) { /* * The previously registered mixer device is the CS4231A which * has no function on an ACI card. Make the ACI mixer the first * of the two mixer devices. */ mixer_devs[num_mixers] = mixer_devs[num_mixers-1]; mixer_devs[num_mixers-1] = &aci_mixer_operations; /* * Initialize the CS4231A mixer with reasonable values. It is * unlikely that the user ever will want to change these as all * channels can be mixed via ACI. */ volume = 0x6464; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_PCM, (caddr_t) &volume); volume = 0x6464; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_IGAIN, (caddr_t) &volume); volume = 0; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_SPEAKER, (caddr_t) &volume); volume = 0; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_MIC, (caddr_t) &volume); volume = 0; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_IMIX, (caddr_t) &volume); volume = 0; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_LINE1, (caddr_t) &volume); volume = 0; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_LINE2, (caddr_t) &volume); volume = 0; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_LINE3, (caddr_t) &volume); volume = SOUND_MASK_LINE1; mixer_devs[num_mixers]-> ioctl(num_mixers, SOUND_MIXER_WRITE_RECSRC, (caddr_t) &volume); num_mixers++; } else mixer_devs[num_mixers++] = &aci_mixer_operations; } /* Initialize ACI mixer with reasonable power-up values */ volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_VOLUME, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_SYNTH, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_PCM, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_LINE, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_MIC, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_CD, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_LINE1, (caddr_t) &volume); volume = 0x3232; aci_mixer_ioctl(num_mixers-1, SOUND_MIXER_WRITE_LINE2, (caddr_t) &volume); aci_present = 1; return 1; } void unload_aci(void) { if (aci_present) release_region(aci_port, 3); } #endif
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