2 * Driver for Digigram VX soundcards
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <sound/driver.h>
24 #include <linux/delay.h>
25 #include <sound/core.h>
26 #include <sound/vx_core.h>
31 * vx_modify_board_clock - tell the board that its clock has been modified
32 * @sync: DSP needs to resynchronize its FIFO
34 static int vx_modify_board_clock(struct vx_core *chip, int sync)
38 vx_init_rmh(&rmh, CMD_MODIFY_CLOCK);
39 /* Ask the DSP to resynchronize its FIFO. */
41 rmh.Cmd[0] |= CMD_MODIFY_CLOCK_S_BIT;
42 return vx_send_msg(chip, &rmh);
46 * vx_modify_board_inputs - resync audio inputs
48 static int vx_modify_board_inputs(struct vx_core *chip)
52 vx_init_rmh(&rmh, CMD_RESYNC_AUDIO_INPUTS);
53 rmh.Cmd[0] |= 1 << 0; /* reference: AUDIO 0 */
54 return vx_send_msg(chip, &rmh);
58 * vx_read_one_cbit - read one bit from UER config
59 * @index: the bit index
62 static int vx_read_one_cbit(struct vx_core *chip, int index)
66 spin_lock_irqsave(&chip->lock, flags);
67 if (chip->type >= VX_TYPE_VXPOCKET) {
68 vx_outb(chip, CSUER, 1); /* read */
69 vx_outb(chip, RUER, index & XX_UER_CBITS_OFFSET_MASK);
70 val = (vx_inb(chip, RUER) >> 7) & 0x01;
72 vx_outl(chip, CSUER, 1); /* read */
73 vx_outl(chip, RUER, index & XX_UER_CBITS_OFFSET_MASK);
74 val = (vx_inl(chip, RUER) >> 7) & 0x01;
76 spin_unlock_irqrestore(&chip->lock, flags);
81 * vx_write_one_cbit - write one bit to UER config
82 * @index: the bit index
83 * @val: bit value, 0 or 1
85 static void vx_write_one_cbit(struct vx_core *chip, int index, int val)
88 val = !!val; /* 0 or 1 */
89 spin_lock_irqsave(&chip->lock, flags);
90 if (vx_is_pcmcia(chip)) {
91 vx_outb(chip, CSUER, 0); /* write */
92 vx_outb(chip, RUER, (val << 7) | (index & XX_UER_CBITS_OFFSET_MASK));
94 vx_outl(chip, CSUER, 0); /* write */
95 vx_outl(chip, RUER, (val << 7) | (index & XX_UER_CBITS_OFFSET_MASK));
97 spin_unlock_irqrestore(&chip->lock, flags);
101 * vx_read_uer_status - read the current UER status
102 * @mode: pointer to store the UER mode, VX_UER_MODE_XXX
104 * returns the frequency of UER, or 0 if not sync,
105 * or a negative error code.
107 static int vx_read_uer_status(struct vx_core *chip, int *mode)
114 /* Read UER status */
115 if (vx_is_pcmcia(chip))
116 val = vx_inb(chip, CSUER);
118 val = vx_inl(chip, CSUER);
121 /* If clock is present, read frequency */
122 if (val & VX_SUER_CLOCK_PRESENT_MASK) {
123 switch (val & VX_SUER_FREQ_MASK) {
124 case VX_SUER_FREQ_32KHz_MASK:
127 case VX_SUER_FREQ_44KHz_MASK:
130 case VX_SUER_FREQ_48KHz_MASK:
135 if (val & VX_SUER_DATA_PRESENT_MASK)
136 /* bit 0 corresponds to consumer/professional bit */
137 *mode = vx_read_one_cbit(chip, 0) ?
138 VX_UER_MODE_PROFESSIONAL : VX_UER_MODE_CONSUMER;
140 *mode = VX_UER_MODE_NOT_PRESENT;
147 * compute the sample clock value from frequency
149 * The formula is as follows:
151 * HexFreq = (dword) ((double) ((double) 28224000 / (double) Frequency))
152 * switch ( HexFreq & 0x00000F00 )
155 * case 0x00000300: HexFreq -= 0x00000201 ;
159 * case 0x00000700: HexFreq = (dword) (((double) 28224000 / (double) (Frequency*2)) - 1)
160 * default : HexFreq = (dword) ((double) 28224000 / (double) (Frequency*4)) - 0x000001FF
163 static int vx_calc_clock_from_freq(struct vx_core *chip, int freq)
167 snd_assert(freq > 0, return 0);
169 hexfreq = (28224000 * 10) / freq;
170 hexfreq = (hexfreq + 5) / 10;
172 /* max freq = 55125 Hz */
173 snd_assert(hexfreq > 0x00000200, return 0);
175 if (hexfreq <= 0x03ff)
176 return hexfreq - 0x00000201;
177 if (hexfreq <= 0x07ff)
178 return (hexfreq / 2) - 1;
179 if (hexfreq <= 0x0fff)
180 return (hexfreq / 4) + 0x000001ff;
182 return 0x5fe; /* min freq = 6893 Hz */
187 * vx_change_clock_source - change the clock source
188 * @source: the new source
190 static void vx_change_clock_source(struct vx_core *chip, int source)
194 /* we mute DAC to prevent clicks */
195 vx_toggle_dac_mute(chip, 1);
196 spin_lock_irqsave(&chip->lock, flags);
197 chip->ops->set_clock_source(chip, source);
198 chip->clock_source = source;
199 spin_unlock_irqrestore(&chip->lock, flags);
201 vx_toggle_dac_mute(chip, 0);
206 * set the internal clock
208 void vx_set_internal_clock(struct vx_core *chip, unsigned int freq)
212 /* Get real clock value */
213 clock = vx_calc_clock_from_freq(chip, freq);
214 snd_printdd(KERN_DEBUG "set internal clock to 0x%x from freq %d\n", clock, freq);
215 spin_lock_irqsave(&chip->lock, flags);
216 if (vx_is_pcmcia(chip)) {
217 vx_outb(chip, HIFREQ, (clock >> 8) & 0x0f);
218 vx_outb(chip, LOFREQ, clock & 0xff);
220 vx_outl(chip, HIFREQ, (clock >> 8) & 0x0f);
221 vx_outl(chip, LOFREQ, clock & 0xff);
223 spin_unlock_irqrestore(&chip->lock, flags);
228 * set the iec958 status bits
229 * @bits: 32-bit status bits
231 void vx_set_iec958_status(struct vx_core *chip, unsigned int bits)
235 if (chip->chip_status & VX_STAT_IS_STALE)
238 for (i = 0; i < 32; i++)
239 vx_write_one_cbit(chip, i, bits & (1 << i));
244 * vx_set_clock - change the clock and audio source if necessary
246 int vx_set_clock(struct vx_core *chip, unsigned int freq)
250 if (chip->chip_status & VX_STAT_IS_STALE)
253 /* change the audio source if possible */
254 vx_sync_audio_source(chip);
256 if (chip->clock_mode == VX_CLOCK_MODE_EXTERNAL ||
257 (chip->clock_mode == VX_CLOCK_MODE_AUTO &&
258 chip->audio_source == VX_AUDIO_SRC_DIGITAL)) {
259 if (chip->clock_source != UER_SYNC) {
260 vx_change_clock_source(chip, UER_SYNC);
264 } else if (chip->clock_mode == VX_CLOCK_MODE_INTERNAL ||
265 (chip->clock_mode == VX_CLOCK_MODE_AUTO &&
266 chip->audio_source != VX_AUDIO_SRC_DIGITAL)) {
267 if (chip->clock_source != INTERNAL_QUARTZ) {
268 vx_change_clock_source(chip, INTERNAL_QUARTZ);
271 if (chip->freq == freq)
273 vx_set_internal_clock(chip, freq);
275 vx_modify_board_inputs(chip);
277 if (chip->freq == freq)
280 vx_modify_board_clock(chip, 1);
286 * vx_change_frequency - called from interrupt handler
288 int vx_change_frequency(struct vx_core *chip)
292 if (chip->chip_status & VX_STAT_IS_STALE)
295 if (chip->clock_source == INTERNAL_QUARTZ)
298 * Read the real UER board frequency
300 freq = vx_read_uer_status(chip, &chip->uer_detected);
304 * The frequency computed by the DSP is good and
305 * is different from the previous computed.
307 if (freq == 48000 || freq == 44100 || freq == 32000)
308 chip->freq_detected = freq;