diff options
Diffstat (limited to 'sound/drivers/vx/vx_uer.c')
| -rw-r--r-- | sound/drivers/vx/vx_uer.c | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/sound/drivers/vx/vx_uer.c b/sound/drivers/vx/vx_uer.c new file mode 100644 index 000000000000..18114713c3b3 --- /dev/null +++ b/sound/drivers/vx/vx_uer.c @@ -0,0 +1,321 @@ +/* + * Driver for Digigram VX soundcards + * + * IEC958 stuff + * + * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <sound/driver.h> +#include <linux/delay.h> +#include <sound/core.h> +#include <sound/vx_core.h> +#include "vx_cmd.h" + + +/* + * vx_modify_board_clock - tell the board that its clock has been modified + * @sync: DSP needs to resynchronize its FIFO + */ +static int vx_modify_board_clock(vx_core_t *chip, int sync) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_MODIFY_CLOCK); + /* Ask the DSP to resynchronize its FIFO. */ + if (sync) + rmh.Cmd[0] |= CMD_MODIFY_CLOCK_S_BIT; + return vx_send_msg(chip, &rmh); +} + +/* + * vx_modify_board_inputs - resync audio inputs + */ +static int vx_modify_board_inputs(vx_core_t *chip) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_RESYNC_AUDIO_INPUTS); + rmh.Cmd[0] |= 1 << 0; /* reference: AUDIO 0 */ + return vx_send_msg(chip, &rmh); +} + +/* + * vx_read_one_cbit - read one bit from UER config + * @index: the bit index + * returns 0 or 1. + */ +static int vx_read_one_cbit(vx_core_t *chip, int index) +{ + unsigned long flags; + int val; + spin_lock_irqsave(&chip->lock, flags); + if (chip->type >= VX_TYPE_VXPOCKET) { + vx_outb(chip, CSUER, 1); /* read */ + vx_outb(chip, RUER, index & XX_UER_CBITS_OFFSET_MASK); + val = (vx_inb(chip, RUER) >> 7) & 0x01; + } else { + vx_outl(chip, CSUER, 1); /* read */ + vx_outl(chip, RUER, index & XX_UER_CBITS_OFFSET_MASK); + val = (vx_inl(chip, RUER) >> 7) & 0x01; + } + spin_unlock_irqrestore(&chip->lock, flags); + return val; +} + +/* + * vx_write_one_cbit - write one bit to UER config + * @index: the bit index + * @val: bit value, 0 or 1 + */ +static void vx_write_one_cbit(vx_core_t *chip, int index, int val) +{ + unsigned long flags; + val = !!val; /* 0 or 1 */ + spin_lock_irqsave(&chip->lock, flags); + if (vx_is_pcmcia(chip)) { + vx_outb(chip, CSUER, 0); /* write */ + vx_outb(chip, RUER, (val << 7) | (index & XX_UER_CBITS_OFFSET_MASK)); + } else { + vx_outl(chip, CSUER, 0); /* write */ + vx_outl(chip, RUER, (val << 7) | (index & XX_UER_CBITS_OFFSET_MASK)); + } + spin_unlock_irqrestore(&chip->lock, flags); +} + +/* + * vx_read_uer_status - read the current UER status + * @mode: pointer to store the UER mode, VX_UER_MODE_XXX + * + * returns the frequency of UER, or 0 if not sync, + * or a negative error code. + */ +static int vx_read_uer_status(vx_core_t *chip, int *mode) +{ + int val, freq; + + /* Default values */ + freq = 0; + + /* Read UER status */ + if (vx_is_pcmcia(chip)) + val = vx_inb(chip, CSUER); + else + val = vx_inl(chip, CSUER); + if (val < 0) + return val; + /* If clock is present, read frequency */ + if (val & VX_SUER_CLOCK_PRESENT_MASK) { + switch (val & VX_SUER_FREQ_MASK) { + case VX_SUER_FREQ_32KHz_MASK: + freq = 32000; + break; + case VX_SUER_FREQ_44KHz_MASK: + freq = 44100; + break; + case VX_SUER_FREQ_48KHz_MASK: + freq = 48000; + break; + } + } + if (val & VX_SUER_DATA_PRESENT_MASK) + /* bit 0 corresponds to consumer/professional bit */ + *mode = vx_read_one_cbit(chip, 0) ? + VX_UER_MODE_PROFESSIONAL : VX_UER_MODE_CONSUMER; + else + *mode = VX_UER_MODE_NOT_PRESENT; + + return freq; +} + + +/* + * compute the sample clock value from frequency + * + * The formula is as follows: + * + * HexFreq = (dword) ((double) ((double) 28224000 / (double) Frequency)) + * switch ( HexFreq & 0x00000F00 ) + * case 0x00000100: ; + * case 0x00000200: + * case 0x00000300: HexFreq -= 0x00000201 ; + * case 0x00000400: + * case 0x00000500: + * case 0x00000600: + * case 0x00000700: HexFreq = (dword) (((double) 28224000 / (double) (Frequency*2)) - 1) + * default : HexFreq = (dword) ((double) 28224000 / (double) (Frequency*4)) - 0x000001FF + */ + +static int vx_calc_clock_from_freq(vx_core_t *chip, int freq) +{ +#define XX_FECH48000 0x0000004B +#define XX_FECH32000 0x00000171 +#define XX_FECH24000 0x0000024B +#define XX_FECH16000 0x00000371 +#define XX_FECH12000 0x0000044B +#define XX_FECH8000 0x00000571 +#define XX_FECH44100 0x0000007F +#define XX_FECH29400 0x0000016F +#define XX_FECH22050 0x0000027F +#define XX_FECH14000 0x000003EF +#define XX_FECH11025 0x0000047F +#define XX_FECH7350 0x000005BF + + switch (freq) { + case 48000: return XX_FECH48000; + case 44100: return XX_FECH44100; + case 32000: return XX_FECH32000; + case 29400: return XX_FECH29400; + case 24000: return XX_FECH24000; + case 22050: return XX_FECH22050; + case 16000: return XX_FECH16000; + case 14000: return XX_FECH14000; + case 12000: return XX_FECH12000; + case 11025: return XX_FECH11025; + case 8000: return XX_FECH8000; + case 7350: return XX_FECH7350; + default: return freq; /* The value is already correct */ + } +} + + +/* + * vx_change_clock_source - change the clock source + * @source: the new source + */ +static void vx_change_clock_source(vx_core_t *chip, int source) +{ + unsigned long flags; + + /* we mute DAC to prevent clicks */ + vx_toggle_dac_mute(chip, 1); + spin_lock_irqsave(&chip->lock, flags); + chip->ops->set_clock_source(chip, source); + chip->clock_source = source; + spin_unlock_irqrestore(&chip->lock, flags); + /* unmute */ + vx_toggle_dac_mute(chip, 0); +} + + +/* + * set the internal clock + */ +void vx_set_internal_clock(vx_core_t *chip, unsigned int freq) +{ + int clock; + unsigned long flags; + /* Get real clock value */ + clock = vx_calc_clock_from_freq(chip, freq); + snd_printdd(KERN_DEBUG "set internal clock to 0x%x from freq %d\n", clock, freq); + spin_lock_irqsave(&chip->lock, flags); + if (vx_is_pcmcia(chip)) { + vx_outb(chip, HIFREQ, (clock >> 8) & 0x0f); + vx_outb(chip, LOFREQ, clock & 0xff); + } else { + vx_outl(chip, HIFREQ, (clock >> 8) & 0x0f); + vx_outl(chip, LOFREQ, clock & 0xff); + } + spin_unlock_irqrestore(&chip->lock, flags); +} + + +/* + * set the iec958 status bits + * @bits: 32-bit status bits + */ +void vx_set_iec958_status(vx_core_t *chip, unsigned int bits) +{ + int i; + + if (chip->chip_status & VX_STAT_IS_STALE) + return; + + for (i = 0; i < 32; i++) + vx_write_one_cbit(chip, i, bits & (1 << i)); +} + + +/* + * vx_set_clock - change the clock and audio source if necessary + */ +int vx_set_clock(vx_core_t *chip, unsigned int freq) +{ + int src_changed = 0; + + if (chip->chip_status & VX_STAT_IS_STALE) + return 0; + + /* change the audio source if possible */ + vx_sync_audio_source(chip); + + if (chip->clock_mode == VX_CLOCK_MODE_EXTERNAL || + (chip->clock_mode == VX_CLOCK_MODE_AUTO && + chip->audio_source == VX_AUDIO_SRC_DIGITAL)) { + if (chip->clock_source != UER_SYNC) { + vx_change_clock_source(chip, UER_SYNC); + mdelay(6); + src_changed = 1; + } + } else if (chip->clock_mode == VX_CLOCK_MODE_INTERNAL || + (chip->clock_mode == VX_CLOCK_MODE_AUTO && + chip->audio_source != VX_AUDIO_SRC_DIGITAL)) { + if (chip->clock_source != INTERNAL_QUARTZ) { + vx_change_clock_source(chip, INTERNAL_QUARTZ); + src_changed = 1; + } + if (chip->freq == freq) + return 0; + vx_set_internal_clock(chip, freq); + if (src_changed) + vx_modify_board_inputs(chip); + } + if (chip->freq == freq) + return 0; + chip->freq = freq; + vx_modify_board_clock(chip, 1); + return 0; +} + + +/* + * vx_change_frequency - called from interrupt handler + */ +int vx_change_frequency(vx_core_t *chip) +{ + int freq; + + if (chip->chip_status & VX_STAT_IS_STALE) + return 0; + + if (chip->clock_source == INTERNAL_QUARTZ) + return 0; + /* + * Read the real UER board frequency + */ + freq = vx_read_uer_status(chip, &chip->uer_detected); + if (freq < 0) + return freq; + /* + * The frequency computed by the DSP is good and + * is different from the previous computed. + */ + if (freq == 48000 || freq == 44100 || freq == 32000) + chip->freq_detected = freq; + + return 0; +} |