712 строки
18 KiB
C
712 строки
18 KiB
C
/*
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* Audio Command Interface (ACI) driver (sound/aci.c)
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*
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* ACI is a protocol used to communicate with the microcontroller on
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* some sound cards produced by miro, e.g. the miroSOUND PCM12 and
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* PCM20. The ACI has been developed for miro by Norberto Pellicci
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* <pellicci@home.com>. Special thanks to both him and miro for
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* providing the ACI specification.
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*
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* The main function of the ACI is to control the mixer and to get a
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* product identification. On the PCM20, ACI also controls the radio
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* tuner on this card, this is supported in the Video for Linux
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* miropcm20 driver.
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* -
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* This is a fullfeatured implementation. Unsupported features
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* are bugs... (:
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*
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* It is not longer necessary to load the mad16 module first. The
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* user is currently responsible to set the mad16 mixer correctly.
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*
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* To toggle the solo mode for full duplex operation just use the OSS
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* record switch for the pcm ('wave') controller. Robert
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* -
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*
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* Revision history:
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*
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* 1995-11-10 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
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* First version written.
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* 1995-12-31 Markus Kuhn
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* Second revision, general code cleanup.
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* 1996-05-16 Hannu Savolainen
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* Integrated with other parts of the driver.
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* 1996-05-28 Markus Kuhn
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* Initialize CS4231A mixer, make ACI first mixer,
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* use new private mixer API for solo mode.
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* 1998-08-18 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
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* Small modification to export ACI functions and
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* complete modularisation.
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* 2000-06-20 Robert Siemer <Robert.Siemer@gmx.de>
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* Don't initialize the CS4231A mixer anymore, so the code is
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* working again, and other small changes to fit in todays
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* kernels.
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* 2000-08-26 Robert Siemer
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* Clean up and rewrite for 2.4.x. Maybe it's SMP safe now... (:
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* ioctl bugfix, and integration of solo-mode into OSS-API,
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* added (OSS-limited) equalizer support, return value bugfix,
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* changed param aci_reset to reset, new params: ide, wss.
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* 2001-04-20 Robert Siemer
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* even more cleanups...
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* 2001-10-08 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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* Get rid of check_region, .bss optimizations, use set_current_state
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/slab.h>
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#include <asm/semaphore.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include "sound_config.h"
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int aci_port; /* as determined by bit 4 in the OPTi 929 MC4 register */
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static int aci_idcode[2]; /* manufacturer and product ID */
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int aci_version; /* ACI firmware version */
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EXPORT_SYMBOL(aci_port);
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EXPORT_SYMBOL(aci_version);
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#include "aci.h"
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static int aci_solo; /* status bit of the card that can't be *
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* checked with ACI versions prior to 0xb0 */
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static int aci_amp; /* status bit for power-amp/line-out level
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but I have no docs about what is what... */
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static int aci_micpreamp=3; /* microphone preamp-level that can't be *
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* checked with ACI versions prior to 0xb0 */
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static int mixer_device;
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static struct semaphore aci_sem;
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#ifdef MODULE
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static int reset;
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module_param(reset, bool, 0);
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MODULE_PARM_DESC(reset,"When set to 1, reset aci mixer.");
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#else
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static int reset = 1;
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#endif
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static int ide=-1;
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module_param(ide, int, 0);
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MODULE_PARM_DESC(ide,"1 enable, 0 disable ide-port - untested"
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" default: do nothing");
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static int wss=-1;
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module_param(wss, int, 0);
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MODULE_PARM_DESC(wss,"change between ACI/WSS-mixer; use 0 and 1 - untested"
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" default: do nothing; for PCM1-pro only");
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#ifdef DEBUG
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static void print_bits(unsigned char c)
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{
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int j;
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printk(KERN_DEBUG "aci: ");
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for (j=7; j>=0; j--) {
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printk("%d", (c >> j) & 0x1);
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}
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printk("\n");
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}
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#endif
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/*
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* This busy wait code normally requires less than 15 loops and
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* practically always less than 100 loops on my i486/DX2 66 MHz.
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*
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* Warning: Waiting on the general status flag after reseting the MUTE
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* function can take a VERY long time, because the PCM12 does some kind
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* of fade-in effect. For this reason, access to the MUTE function has
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* not been implemented at all.
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*
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* - The OSS interface has no mute option. It takes about 3 seconds to
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* fade-in on my PCM20. busy_wait() handles it great now... Robert
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*/
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static int busy_wait(void)
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{
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#define MINTIME 500
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long timeout;
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unsigned char byte;
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for (timeout = 1; timeout <= MINTIME+30; timeout++) {
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if (((byte=inb(BUSY_REGISTER)) & 1) == 0) {
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if (timeout >= MINTIME)
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printk(KERN_DEBUG "aci: Got READYFLAG in round %ld.\n", timeout-MINTIME);
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return byte;
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}
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if (timeout >= MINTIME) {
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long out=10*HZ;
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switch (timeout-MINTIME) {
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case 0 ... 9:
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out /= 10;
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case 10 ... 19:
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out /= 10;
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case 20 ... 30:
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out /= 10;
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default:
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(out);
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break;
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}
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}
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}
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printk(KERN_WARNING "aci: busy_wait() time out.\n");
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return -EBUSY;
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}
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/* The four ACI command types are fucked up. [-:
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* implied is: 1w - special case for INIT
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* write is: 2w1r
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* read is: x(1w1r) where x is 1 or 2 (1 CHECK_SIG, 1 CHECK_STER,
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* 1 VERSION, 2 IDCODE)
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* the command is only in the first write, rest is protocol overhead
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*
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* indexed is technically a write and used for STATUS
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* and the special case for TUNE is: 3w1r
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*
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* Here the new general sheme: TUNE --> aci_rw_cmd(x, y, z)
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* indexed and write --> aci_rw_cmd(x, y, -1)
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* implied and read (x=1) --> aci_rw_cmd(x, -1, -1)
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*
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* Read (x>=2) is not implemented (only used during initialization).
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* Use aci_idcode[2] and aci_version... Robert
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*/
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/* Some notes for error detection: theoretically it is possible.
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* But it doubles the I/O-traffic from ww(r) to wwwrw(r) in the normal
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* case and doesn't seem to be designed for that... Robert
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*/
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static inline int aci_rawwrite(unsigned char byte)
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{
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if (busy_wait() >= 0) {
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#ifdef DEBUG
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printk(KERN_DEBUG "aci_rawwrite(%d)\n", byte);
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#endif
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outb(byte, COMMAND_REGISTER);
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return 0;
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} else
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return -EBUSY;
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}
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static inline int aci_rawread(void)
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{
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unsigned char byte;
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if (busy_wait() >= 0) {
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byte=inb(STATUS_REGISTER);
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#ifdef DEBUG
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printk(KERN_DEBUG "%d = aci_rawread()\n", byte);
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#endif
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return byte;
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} else
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return -EBUSY;
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}
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int aci_rw_cmd(int write1, int write2, int write3)
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{
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int write[] = {write1, write2, write3};
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int read = -EINTR, i;
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if (down_interruptible(&aci_sem))
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goto out;
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for (i=0; i<3; i++) {
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if (write[i]< 0 || write[i] > 255)
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break;
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else {
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read = aci_rawwrite(write[i]);
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if (read < 0)
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goto out_up;
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}
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}
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read = aci_rawread();
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out_up: up(&aci_sem);
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out: return read;
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}
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EXPORT_SYMBOL(aci_rw_cmd);
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static int setvolume(int __user *arg,
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unsigned char left_index, unsigned char right_index)
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{
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int vol, ret, uservol, buf;
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__get_user(uservol, arg);
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/* left channel */
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vol = uservol & 0xff;
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if (vol > 100)
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vol = 100;
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vol = SCALE(100, 0x20, vol);
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if ((buf=aci_write_cmd(left_index, 0x20 - vol))<0)
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return buf;
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ret = SCALE(0x20, 100, vol);
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/* right channel */
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vol = (uservol >> 8) & 0xff;
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if (vol > 100)
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vol = 100;
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vol = SCALE(100, 0x20, vol);
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if ((buf=aci_write_cmd(right_index, 0x20 - vol))<0)
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return buf;
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ret |= SCALE(0x20, 100, vol) << 8;
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__put_user(ret, arg);
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return 0;
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}
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static int getvolume(int __user *arg,
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unsigned char left_index, unsigned char right_index)
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{
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int vol;
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int buf;
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/* left channel */
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if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
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return buf;
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vol = SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0);
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/* right channel */
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if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
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return buf;
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vol |= SCALE(0x20, 100, buf < 0x20 ? 0x20-buf : 0) << 8;
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__put_user(vol, arg);
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return 0;
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}
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/* The equalizer is somewhat strange on the ACI. From -12dB to +12dB
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* write: 0xff..down.to..0x80==0x00..up.to..0x7f
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*/
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static inline unsigned int eq_oss2aci(unsigned int vol)
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{
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int boost=0;
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unsigned int ret;
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if (vol > 100)
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vol = 100;
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if (vol > 50) {
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vol -= 51;
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boost=1;
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}
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if (boost)
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ret=SCALE(49, 0x7e, vol)+1;
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else
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ret=0xff - SCALE(50, 0x7f, vol);
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return ret;
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}
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static inline unsigned int eq_aci2oss(unsigned int vol)
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{
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if (vol < 0x80)
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return SCALE(0x7f, 50, vol) + 50;
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else
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return SCALE(0x7f, 50, 0xff-vol);
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}
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static int setequalizer(int __user *arg,
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unsigned char left_index, unsigned char right_index)
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{
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int buf;
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unsigned int vol;
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__get_user(vol, arg);
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/* left channel */
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if ((buf=aci_write_cmd(left_index, eq_oss2aci(vol & 0xff)))<0)
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return buf;
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/* right channel */
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if ((buf=aci_write_cmd(right_index, eq_oss2aci((vol>>8) & 0xff)))<0)
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return buf;
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/* the ACI equalizer is more precise */
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return 0;
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}
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static int getequalizer(int __user *arg,
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unsigned char left_index, unsigned char right_index)
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{
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int buf;
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unsigned int vol;
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/* left channel */
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if ((buf=aci_indexed_cmd(ACI_STATUS, left_index))<0)
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return buf;
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vol = eq_aci2oss(buf);
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/* right channel */
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if ((buf=aci_indexed_cmd(ACI_STATUS, right_index))<0)
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return buf;
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vol |= eq_aci2oss(buf) << 8;
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__put_user(vol, arg);
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return 0;
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}
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static int aci_mixer_ioctl (int dev, unsigned int cmd, void __user * arg)
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{
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int vol, buf;
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int __user *p = arg;
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switch (cmd) {
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case SOUND_MIXER_WRITE_VOLUME:
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return setvolume(p, 0x01, 0x00);
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case SOUND_MIXER_WRITE_CD:
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return setvolume(p, 0x3c, 0x34);
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case SOUND_MIXER_WRITE_MIC:
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return setvolume(p, 0x38, 0x30);
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case SOUND_MIXER_WRITE_LINE:
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return setvolume(p, 0x39, 0x31);
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case SOUND_MIXER_WRITE_SYNTH:
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return setvolume(p, 0x3b, 0x33);
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case SOUND_MIXER_WRITE_PCM:
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return setvolume(p, 0x3a, 0x32);
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case MIXER_WRITE(SOUND_MIXER_RADIO): /* fall through */
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case SOUND_MIXER_WRITE_LINE1: /* AUX1 or radio */
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return setvolume(p, 0x3d, 0x35);
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case SOUND_MIXER_WRITE_LINE2: /* AUX2 */
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return setvolume(p, 0x3e, 0x36);
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case SOUND_MIXER_WRITE_BASS: /* set band one and two */
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if (aci_idcode[1]=='C') {
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if ((buf=setequalizer(p, 0x48, 0x40)) ||
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(buf=setequalizer(p, 0x49, 0x41)));
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return buf;
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}
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break;
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case SOUND_MIXER_WRITE_TREBLE: /* set band six and seven */
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if (aci_idcode[1]=='C') {
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if ((buf=setequalizer(p, 0x4d, 0x45)) ||
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(buf=setequalizer(p, 0x4e, 0x46)));
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return buf;
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}
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break;
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case SOUND_MIXER_WRITE_IGAIN: /* MIC pre-amp */
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if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
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__get_user(vol, p);
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vol = vol & 0xff;
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if (vol > 100)
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vol = 100;
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vol = SCALE(100, 3, vol);
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if ((buf=aci_write_cmd(ACI_WRITE_IGAIN, vol))<0)
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return buf;
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aci_micpreamp = vol;
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vol = SCALE(3, 100, vol);
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vol |= (vol << 8);
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__put_user(vol, p);
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return 0;
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}
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break;
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case SOUND_MIXER_WRITE_OGAIN: /* Power-amp/line-out level */
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if (aci_idcode[1]=='A' || aci_idcode[1]=='B') {
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__get_user(buf, p);
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buf = buf & 0xff;
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if (buf > 50)
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vol = 1;
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else
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vol = 0;
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if ((buf=aci_write_cmd(ACI_SET_POWERAMP, vol))<0)
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return buf;
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aci_amp = vol;
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if (aci_amp)
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buf = (100 || 100<<8);
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else
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buf = 0;
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__put_user(buf, p);
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return 0;
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}
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break;
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case SOUND_MIXER_WRITE_RECSRC:
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/* handle solo mode control */
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__get_user(buf, p);
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/* unset solo when RECSRC for PCM is requested */
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if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
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vol = !(buf & SOUND_MASK_PCM);
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if ((buf=aci_write_cmd(ACI_SET_SOLOMODE, vol))<0)
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return buf;
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aci_solo = vol;
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}
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buf = (SOUND_MASK_CD| SOUND_MASK_MIC| SOUND_MASK_LINE|
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SOUND_MASK_SYNTH| SOUND_MASK_LINE2);
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if (aci_idcode[1] == 'C') /* PCM20 radio */
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buf |= SOUND_MASK_RADIO;
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else
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buf |= SOUND_MASK_LINE1;
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if (!aci_solo)
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buf |= SOUND_MASK_PCM;
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__put_user(buf, p);
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return 0;
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case SOUND_MIXER_READ_DEVMASK:
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buf = (SOUND_MASK_VOLUME | SOUND_MASK_CD |
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SOUND_MASK_MIC | SOUND_MASK_LINE |
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SOUND_MASK_SYNTH | SOUND_MASK_PCM |
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SOUND_MASK_LINE2);
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switch (aci_idcode[1]) {
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case 'C': /* PCM20 radio */
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buf |= (SOUND_MASK_RADIO | SOUND_MASK_IGAIN |
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SOUND_MASK_BASS | SOUND_MASK_TREBLE);
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break;
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case 'B': /* PCM12 */
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buf |= (SOUND_MASK_LINE1 | SOUND_MASK_IGAIN |
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SOUND_MASK_OGAIN);
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break;
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case 'A': /* PCM1-pro */
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buf |= (SOUND_MASK_LINE1 | SOUND_MASK_OGAIN);
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break;
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default:
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buf |= SOUND_MASK_LINE1;
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}
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__put_user(buf, p);
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return 0;
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case SOUND_MIXER_READ_STEREODEVS:
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buf = (SOUND_MASK_VOLUME | SOUND_MASK_CD |
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SOUND_MASK_MIC | SOUND_MASK_LINE |
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SOUND_MASK_SYNTH | SOUND_MASK_PCM |
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SOUND_MASK_LINE2);
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switch (aci_idcode[1]) {
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case 'C': /* PCM20 radio */
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buf |= (SOUND_MASK_RADIO |
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SOUND_MASK_BASS | SOUND_MASK_TREBLE);
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break;
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default:
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buf |= SOUND_MASK_LINE1;
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}
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__put_user(buf, p);
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return 0;
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case SOUND_MIXER_READ_RECMASK:
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buf = (SOUND_MASK_CD| SOUND_MASK_MIC| SOUND_MASK_LINE|
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SOUND_MASK_SYNTH| SOUND_MASK_LINE2| SOUND_MASK_PCM);
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if (aci_idcode[1] == 'C') /* PCM20 radio */
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buf |= SOUND_MASK_RADIO;
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else
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buf |= SOUND_MASK_LINE1;
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__put_user(buf, p);
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return 0;
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case SOUND_MIXER_READ_RECSRC:
|
|
buf = (SOUND_MASK_CD | SOUND_MASK_MIC | SOUND_MASK_LINE |
|
|
SOUND_MASK_SYNTH | SOUND_MASK_LINE2);
|
|
/* do we need aci_solo or can I get it from the ACI? */
|
|
switch (aci_idcode[1]) {
|
|
case 'B': /* PCM12 */
|
|
case 'C': /* PCM20 radio */
|
|
if (aci_version >= 0xb0) {
|
|
if ((vol=aci_rw_cmd(ACI_STATUS,
|
|
ACI_S_GENERAL, -1))<0)
|
|
return vol;
|
|
if (vol & 0x20)
|
|
buf |= SOUND_MASK_PCM;
|
|
}
|
|
else
|
|
if (!aci_solo)
|
|
buf |= SOUND_MASK_PCM;
|
|
break;
|
|
default:
|
|
buf |= SOUND_MASK_PCM;
|
|
}
|
|
if (aci_idcode[1] == 'C') /* PCM20 radio */
|
|
buf |= SOUND_MASK_RADIO;
|
|
else
|
|
buf |= SOUND_MASK_LINE1;
|
|
|
|
__put_user(buf, p);
|
|
return 0;
|
|
case SOUND_MIXER_READ_CAPS:
|
|
__put_user(0, p);
|
|
return 0;
|
|
case SOUND_MIXER_READ_VOLUME:
|
|
return getvolume(p, 0x04, 0x03);
|
|
case SOUND_MIXER_READ_CD:
|
|
return getvolume(p, 0x0a, 0x09);
|
|
case SOUND_MIXER_READ_MIC:
|
|
return getvolume(p, 0x06, 0x05);
|
|
case SOUND_MIXER_READ_LINE:
|
|
return getvolume(p, 0x08, 0x07);
|
|
case SOUND_MIXER_READ_SYNTH:
|
|
return getvolume(p, 0x0c, 0x0b);
|
|
case SOUND_MIXER_READ_PCM:
|
|
return getvolume(p, 0x0e, 0x0d);
|
|
case MIXER_READ(SOUND_MIXER_RADIO): /* fall through */
|
|
case SOUND_MIXER_READ_LINE1: /* AUX1 */
|
|
return getvolume(p, 0x11, 0x10);
|
|
case SOUND_MIXER_READ_LINE2: /* AUX2 */
|
|
return getvolume(p, 0x13, 0x12);
|
|
case SOUND_MIXER_READ_BASS: /* get band one */
|
|
if (aci_idcode[1]=='C') {
|
|
return getequalizer(p, 0x23, 0x22);
|
|
}
|
|
break;
|
|
case SOUND_MIXER_READ_TREBLE: /* get band seven */
|
|
if (aci_idcode[1]=='C') {
|
|
return getequalizer(p, 0x2f, 0x2e);
|
|
}
|
|
break;
|
|
case SOUND_MIXER_READ_IGAIN: /* MIC pre-amp */
|
|
if (aci_idcode[1]=='B' || aci_idcode[1]=='C') {
|
|
/* aci_micpreamp or ACI? */
|
|
if (aci_version >= 0xb0) {
|
|
if ((buf=aci_indexed_cmd(ACI_STATUS,
|
|
ACI_S_READ_IGAIN))<0)
|
|
return buf;
|
|
}
|
|
else
|
|
buf=aci_micpreamp;
|
|
vol = SCALE(3, 100, buf <= 3 ? buf : 3);
|
|
vol |= vol << 8;
|
|
__put_user(vol, p);
|
|
return 0;
|
|
}
|
|
break;
|
|
case SOUND_MIXER_READ_OGAIN:
|
|
if (aci_amp)
|
|
buf = (100 || 100<<8);
|
|
else
|
|
buf = 0;
|
|
__put_user(buf, p);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static struct mixer_operations aci_mixer_operations =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.id = "ACI",
|
|
.ioctl = aci_mixer_ioctl
|
|
};
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
static int __init attach_aci(void)
|
|
{
|
|
char *boardname;
|
|
int i, rc = -EBUSY;
|
|
|
|
init_MUTEX(&aci_sem);
|
|
|
|
outb(0xE3, 0xf8f); /* Write MAD16 password */
|
|
aci_port = (inb(0xf90) & 0x10) ?
|
|
0x344: 0x354; /* Get aci_port from MC4_PORT */
|
|
|
|
if (!request_region(aci_port, 3, "sound mixer (ACI)")) {
|
|
printk(KERN_NOTICE
|
|
"aci: I/O area 0x%03x-0x%03x already used.\n",
|
|
aci_port, aci_port+2);
|
|
goto out;
|
|
}
|
|
|
|
/* force ACI into a known state */
|
|
rc = -EFAULT;
|
|
for (i=0; i<3; i++)
|
|
if (aci_rw_cmd(ACI_ERROR_OP, -1, -1)<0)
|
|
goto out_release_region;
|
|
|
|
/* official this is one aci read call: */
|
|
rc = -EFAULT;
|
|
if ((aci_idcode[0]=aci_rw_cmd(ACI_READ_IDCODE, -1, -1))<0 ||
|
|
(aci_idcode[1]=aci_rw_cmd(ACI_READ_IDCODE, -1, -1))<0) {
|
|
printk(KERN_ERR "aci: Failed to read idcode on 0x%03x.\n",
|
|
aci_port);
|
|
goto out_release_region;
|
|
}
|
|
|
|
if ((aci_version=aci_rw_cmd(ACI_READ_VERSION, -1, -1))<0) {
|
|
printk(KERN_ERR "aci: Failed to read version on 0x%03x.\n",
|
|
aci_port);
|
|
goto out_release_region;
|
|
}
|
|
|
|
if (aci_idcode[0] == 'm') {
|
|
/* It looks like a miro sound card. */
|
|
switch (aci_idcode[1]) {
|
|
case 'A':
|
|
boardname = "PCM1 pro / early PCM12";
|
|
break;
|
|
case 'B':
|
|
boardname = "PCM12";
|
|
break;
|
|
case 'C':
|
|
boardname = "PCM20 radio";
|
|
break;
|
|
default:
|
|
boardname = "unknown miro";
|
|
}
|
|
} else {
|
|
printk(KERN_WARNING "aci: Warning: unsupported card! - "
|
|
"no hardware, no specs...\n");
|
|
boardname = "unknown Cardinal Technologies";
|
|
}
|
|
|
|
printk(KERN_INFO "<ACI 0x%02x, id %02x/%02x \"%c/%c\", (%s)> at 0x%03x\n",
|
|
aci_version,
|
|
aci_idcode[0], aci_idcode[1],
|
|
aci_idcode[0], aci_idcode[1],
|
|
boardname, aci_port);
|
|
|
|
rc = -EBUSY;
|
|
if (reset) {
|
|
/* first write()s after reset fail with my PCM20 */
|
|
if (aci_rw_cmd(ACI_INIT, -1, -1)<0 ||
|
|
aci_rw_cmd(ACI_ERROR_OP, ACI_ERROR_OP, ACI_ERROR_OP)<0 ||
|
|
aci_rw_cmd(ACI_ERROR_OP, ACI_ERROR_OP, ACI_ERROR_OP)<0)
|
|
goto out_release_region;
|
|
}
|
|
|
|
/* the PCM20 is muted after reset (and reboot) */
|
|
if (aci_rw_cmd(ACI_SET_MUTE, 0x00, -1)<0)
|
|
goto out_release_region;
|
|
|
|
if (ide>=0)
|
|
if (aci_rw_cmd(ACI_SET_IDE, !ide, -1)<0)
|
|
goto out_release_region;
|
|
|
|
if (wss>=0 && aci_idcode[1]=='A')
|
|
if (aci_rw_cmd(ACI_SET_WSS, !!wss, -1)<0)
|
|
goto out_release_region;
|
|
|
|
mixer_device = sound_install_mixer(MIXER_DRIVER_VERSION, boardname,
|
|
&aci_mixer_operations,
|
|
sizeof(aci_mixer_operations), NULL);
|
|
rc = 0;
|
|
if (mixer_device < 0) {
|
|
printk(KERN_ERR "aci: Failed to install mixer.\n");
|
|
rc = mixer_device;
|
|
goto out_release_region;
|
|
} /* else Maybe initialize the CS4231A mixer here... */
|
|
out: return rc;
|
|
out_release_region:
|
|
release_region(aci_port, 3);
|
|
goto out;
|
|
}
|
|
|
|
static void __exit unload_aci(void)
|
|
{
|
|
sound_unload_mixerdev(mixer_device);
|
|
release_region(aci_port, 3);
|
|
}
|
|
|
|
module_init(attach_aci);
|
|
module_exit(unload_aci);
|
|
MODULE_LICENSE("GPL");
|