178 lines
4 KiB
C
178 lines
4 KiB
C
/* best viewed with tabsize 4 */
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#include "ak4531.h"
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#include "pci_helper.h"
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#define MASTER_VOLUME_LCH 0x00
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#define MASTER_VOLUME_RCH 0x01
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#define FM_VOLUME_LCH 0x04
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#define FM_VOLUME_RCH 0x05
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#define CD_AUDIO_VOLUME_LCH 0x06
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#define CD_AUDIO_VOLUME_RCH 0x07
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#define LINE_VOLUME_LCH 0x08
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#define LINE_VOLUME_RCH 0x09
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#define MIC_VOLUME 0x0e
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#define MONO_OUT_VOLUME 0x0f
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#define RESET_AND_POWER_DOWN 0x16
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#define PD 0x02
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#define RST 0x01
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#define AD_INPUT_SELECT 0x18
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#define MIC_AMP_GAIN 0x19
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#define MUTE 0x80
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FORWARD _PROTOTYPE( int ak4531_write, (u8_t address, u8_t data) );
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FORWARD _PROTOTYPE( int ak4531_finished, (void) );
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FORWARD _PROTOTYPE( int set_volume, (struct volume_level *level,
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int cmd_left, int cmd_right, int max_level) );
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PRIVATE u16_t base_address;
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PRIVATE u16_t status_register;
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PRIVATE u16_t status_bit;
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PRIVATE u16_t poll_address;
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u8_t mixer_values[0x20] = {
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0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 0x00 - 0x07 */
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0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x08, /* 0x08 - 0x0f */
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0x7e, 0x3d, 0x01, 0x01, 0x00, 0x00, 0x03, 0x00, /* 0x10 - 0x17 */
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0x00, 0x01 /* 0x18 - 0x19 */
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};
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#if 0
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u8_t mixer_values[0x20] = {
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0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 0x00 - 0x07 */
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0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 0x08 - 0x0f */
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0x7f, 0x3d, 0x55, 0x26, 0xf7, 0xef, 0x03, 0x00, /* 0x10 - 0x17 */
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0x00, 0x01 /* 0x18 - 0x19 */
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};
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#endif
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PRIVATE int ak4531_finished(void) {
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int i;
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u16_t cstat;
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for (i = 0; i < 0x40000; i++) {
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cstat = pci_inw(status_register);
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if (!(cstat & status_bit)) {
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return 1;
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}
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}
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return 0;
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}
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PRIVATE int ak4531_write (u8_t address, u8_t data) {
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u16_t to_be_written;
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if (address < MASTER_VOLUME_LCH || address > MIC_AMP_GAIN) return -1;
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to_be_written = (u16_t)((address << 8) | data);
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if (!ak4531_finished()) return -1;
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pci_outw(base_address, to_be_written);
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return 0;
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}
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PUBLIC int ak4531_init(u16_t base, u16_t status_reg, u16_t bit,
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u16_t poll) {
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int i;
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base_address = base;
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status_register = status_reg;
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status_bit = bit;
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poll_address = poll;
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for (i=0; i<100; i++) {
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pci_inb(poll_address);
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}
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if(ak4531_write(RESET_AND_POWER_DOWN, PD|RST) < 0) return -1;
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for (i=0; i<100; i++) {
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pci_inb(poll_address);
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}
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ak4531_write(AD_INPUT_SELECT, 0x00);
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for (i = MASTER_VOLUME_LCH ; i <= MIC_AMP_GAIN; i++) {
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if (ak4531_write(i, mixer_values[i]) < 0) return -1;
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}
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return 0;
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}
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PUBLIC int ak4531_get_set_volume(struct volume_level *level, int flag) {
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int cmd_left, cmd_right, max_level;
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max_level = 0x1f;
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switch(level->device) {
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case Master:
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cmd_left = MASTER_VOLUME_LCH;
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cmd_right = MASTER_VOLUME_RCH;
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break;
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case Dac:
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return EINVAL;
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break;
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case Fm:
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cmd_left = FM_VOLUME_LCH;
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cmd_right = FM_VOLUME_RCH;
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break;
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case Cd:
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cmd_left = CD_AUDIO_VOLUME_LCH;
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cmd_right = CD_AUDIO_VOLUME_RCH;
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break;
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case Line:
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cmd_left = LINE_VOLUME_LCH;
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cmd_right = LINE_VOLUME_RCH;
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break;
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case Mic:
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cmd_left = cmd_right = MIC_VOLUME;
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break;
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case Speaker:
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cmd_left = cmd_right = MONO_OUT_VOLUME;
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max_level = 0x03;
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break;
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case Treble:
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return EINVAL;
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break;
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case Bass:
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return EINVAL;
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break;
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default:
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return EINVAL;
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}
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if (flag) { /* set volume */
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return set_volume(level, cmd_left, cmd_right, max_level);
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}
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else { /* get volume */
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level->left = - ((int) (mixer_values[cmd_left] & ~MUTE)) + 0x1f;
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level->right = - ((int) (mixer_values[cmd_right] & ~MUTE)) + 0x1f;
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return OK;
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}
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}
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PRIVATE int set_volume(struct volume_level *level, int cmd_left, int cmd_right,
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int max_level) {
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if(level->right < 0) level->right = 0;
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else if(level->right > max_level) level->right = max_level;
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if(level->left < 0) level->left = 0;
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else if(level->left > max_level) level->left = max_level;
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mixer_values[cmd_left] = (-level->left)+0x1f;
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ak4531_write(cmd_left, mixer_values[cmd_left]);
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mixer_values[cmd_right] = (-level->right)+0x1f;
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ak4531_write(cmd_right, mixer_values[cmd_right]);
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return OK;
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}
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