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608 lines
16 KiB
608 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) by Uros Bizjak <[email protected]> |
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* |
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* Routines for OPL2/OPL3/OPL4 control |
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*/ |
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#include <linux/slab.h> |
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#include <linux/export.h> |
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#include <linux/nospec.h> |
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#include <sound/opl3.h> |
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#include <sound/asound_fm.h> |
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#include "opl3_voice.h" |
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#if IS_ENABLED(CONFIG_SND_SEQUENCER) |
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#define OPL3_SUPPORT_SYNTH |
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#endif |
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/* |
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* There is 18 possible 2 OP voices |
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* (9 in the left and 9 in the right). |
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* The first OP is the modulator and 2nd is the carrier. |
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* |
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* The first three voices in the both sides may be connected |
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* with another voice to a 4 OP voice. For example voice 0 |
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* can be connected with voice 3. The operators of voice 3 are |
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* used as operators 3 and 4 of the new 4 OP voice. |
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* In this case the 2 OP voice number 0 is the 'first half' and |
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* voice 3 is the second. |
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*/ |
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/* |
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* Register offset table for OPL2/3 voices, |
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* OPL2 / one OPL3 register array side only |
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*/ |
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char snd_opl3_regmap[MAX_OPL2_VOICES][4] = |
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{ |
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/* OP1 OP2 OP3 OP4 */ |
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/* ------------------------ */ |
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{ 0x00, 0x03, 0x08, 0x0b }, |
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{ 0x01, 0x04, 0x09, 0x0c }, |
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{ 0x02, 0x05, 0x0a, 0x0d }, |
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{ 0x08, 0x0b, 0x00, 0x00 }, |
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{ 0x09, 0x0c, 0x00, 0x00 }, |
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{ 0x0a, 0x0d, 0x00, 0x00 }, |
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{ 0x10, 0x13, 0x00, 0x00 }, /* used by percussive voices */ |
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{ 0x11, 0x14, 0x00, 0x00 }, /* if the percussive mode */ |
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{ 0x12, 0x15, 0x00, 0x00 } /* is selected (only left reg block) */ |
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}; |
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EXPORT_SYMBOL(snd_opl3_regmap); |
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/* |
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* prototypes |
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*/ |
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static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note); |
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static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice); |
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static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params); |
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static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode); |
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static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection); |
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/* ------------------------------ */ |
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/* |
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* open the device exclusively |
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*/ |
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int snd_opl3_open(struct snd_hwdep * hw, struct file *file) |
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{ |
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return 0; |
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} |
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/* |
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* ioctl for hwdep device: |
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*/ |
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int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file, |
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unsigned int cmd, unsigned long arg) |
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{ |
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struct snd_opl3 *opl3 = hw->private_data; |
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void __user *argp = (void __user *)arg; |
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if (snd_BUG_ON(!opl3)) |
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return -EINVAL; |
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switch (cmd) { |
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/* get information */ |
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case SNDRV_DM_FM_IOCTL_INFO: |
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{ |
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struct snd_dm_fm_info info; |
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memset(&info, 0, sizeof(info)); |
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info.fm_mode = opl3->fm_mode; |
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info.rhythm = opl3->rhythm; |
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if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info))) |
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return -EFAULT; |
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return 0; |
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} |
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case SNDRV_DM_FM_IOCTL_RESET: |
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#ifdef CONFIG_SND_OSSEMUL |
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case SNDRV_DM_FM_OSS_IOCTL_RESET: |
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#endif |
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snd_opl3_reset(opl3); |
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return 0; |
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case SNDRV_DM_FM_IOCTL_PLAY_NOTE: |
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#ifdef CONFIG_SND_OSSEMUL |
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case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE: |
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#endif |
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{ |
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struct snd_dm_fm_note note; |
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if (copy_from_user(¬e, argp, sizeof(struct snd_dm_fm_note))) |
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return -EFAULT; |
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return snd_opl3_play_note(opl3, ¬e); |
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} |
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case SNDRV_DM_FM_IOCTL_SET_VOICE: |
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#ifdef CONFIG_SND_OSSEMUL |
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case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE: |
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#endif |
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{ |
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struct snd_dm_fm_voice voice; |
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if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice))) |
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return -EFAULT; |
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return snd_opl3_set_voice(opl3, &voice); |
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} |
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case SNDRV_DM_FM_IOCTL_SET_PARAMS: |
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#ifdef CONFIG_SND_OSSEMUL |
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case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS: |
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#endif |
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{ |
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struct snd_dm_fm_params params; |
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if (copy_from_user(¶ms, argp, sizeof(struct snd_dm_fm_params))) |
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return -EFAULT; |
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return snd_opl3_set_params(opl3, ¶ms); |
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} |
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case SNDRV_DM_FM_IOCTL_SET_MODE: |
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#ifdef CONFIG_SND_OSSEMUL |
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case SNDRV_DM_FM_OSS_IOCTL_SET_MODE: |
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#endif |
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return snd_opl3_set_mode(opl3, (int) arg); |
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case SNDRV_DM_FM_IOCTL_SET_CONNECTION: |
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#ifdef CONFIG_SND_OSSEMUL |
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case SNDRV_DM_FM_OSS_IOCTL_SET_OPL: |
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#endif |
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return snd_opl3_set_connection(opl3, (int) arg); |
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#ifdef OPL3_SUPPORT_SYNTH |
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case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES: |
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snd_opl3_clear_patches(opl3); |
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return 0; |
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#endif |
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#ifdef CONFIG_SND_DEBUG |
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default: |
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snd_printk(KERN_WARNING "unknown IOCTL: 0x%x\n", cmd); |
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#endif |
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} |
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return -ENOTTY; |
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} |
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/* |
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* close the device |
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*/ |
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int snd_opl3_release(struct snd_hwdep * hw, struct file *file) |
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{ |
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struct snd_opl3 *opl3 = hw->private_data; |
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snd_opl3_reset(opl3); |
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return 0; |
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} |
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#ifdef OPL3_SUPPORT_SYNTH |
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/* |
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* write the device - load patches |
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*/ |
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long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count, |
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loff_t *offset) |
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{ |
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struct snd_opl3 *opl3 = hw->private_data; |
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long result = 0; |
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int err = 0; |
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struct sbi_patch inst; |
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while (count >= sizeof(inst)) { |
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unsigned char type; |
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if (copy_from_user(&inst, buf, sizeof(inst))) |
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return -EFAULT; |
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if (!memcmp(inst.key, FM_KEY_SBI, 4) || |
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!memcmp(inst.key, FM_KEY_2OP, 4)) |
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type = FM_PATCH_OPL2; |
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else if (!memcmp(inst.key, FM_KEY_4OP, 4)) |
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type = FM_PATCH_OPL3; |
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else /* invalid type */ |
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break; |
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err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type, |
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inst.name, inst.extension, |
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inst.data); |
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if (err < 0) |
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break; |
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result += sizeof(inst); |
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count -= sizeof(inst); |
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} |
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return result > 0 ? result : err; |
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} |
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/* |
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* Patch management |
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*/ |
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/* offsets for SBI params */ |
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#define AM_VIB 0 |
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#define KSL_LEVEL 2 |
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#define ATTACK_DECAY 4 |
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#define SUSTAIN_RELEASE 6 |
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#define WAVE_SELECT 8 |
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/* offset for SBI instrument */ |
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#define CONNECTION 10 |
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#define OFFSET_4OP 11 |
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/* |
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* load a patch, obviously. |
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* |
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* loaded on the given program and bank numbers with the given type |
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* (FM_PATCH_OPLx). |
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* data is the pointer of SBI record _without_ header (key and name). |
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* name is the name string of the patch. |
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* ext is the extension data of 7 bytes long (stored in name of SBI |
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* data up to offset 25), or NULL to skip. |
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* return 0 if successful or a negative error code. |
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*/ |
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int snd_opl3_load_patch(struct snd_opl3 *opl3, |
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int prog, int bank, int type, |
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const char *name, |
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const unsigned char *ext, |
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const unsigned char *data) |
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{ |
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struct fm_patch *patch; |
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int i; |
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patch = snd_opl3_find_patch(opl3, prog, bank, 1); |
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if (!patch) |
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return -ENOMEM; |
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patch->type = type; |
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for (i = 0; i < 2; i++) { |
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patch->inst.op[i].am_vib = data[AM_VIB + i]; |
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patch->inst.op[i].ksl_level = data[KSL_LEVEL + i]; |
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patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i]; |
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patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i]; |
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patch->inst.op[i].wave_select = data[WAVE_SELECT + i]; |
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} |
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patch->inst.feedback_connection[0] = data[CONNECTION]; |
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if (type == FM_PATCH_OPL3) { |
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for (i = 0; i < 2; i++) { |
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patch->inst.op[i+2].am_vib = |
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data[OFFSET_4OP + AM_VIB + i]; |
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patch->inst.op[i+2].ksl_level = |
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data[OFFSET_4OP + KSL_LEVEL + i]; |
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patch->inst.op[i+2].attack_decay = |
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data[OFFSET_4OP + ATTACK_DECAY + i]; |
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patch->inst.op[i+2].sustain_release = |
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data[OFFSET_4OP + SUSTAIN_RELEASE + i]; |
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patch->inst.op[i+2].wave_select = |
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data[OFFSET_4OP + WAVE_SELECT + i]; |
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} |
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patch->inst.feedback_connection[1] = |
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data[OFFSET_4OP + CONNECTION]; |
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} |
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if (ext) { |
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patch->inst.echo_delay = ext[0]; |
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patch->inst.echo_atten = ext[1]; |
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patch->inst.chorus_spread = ext[2]; |
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patch->inst.trnsps = ext[3]; |
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patch->inst.fix_dur = ext[4]; |
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patch->inst.modes = ext[5]; |
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patch->inst.fix_key = ext[6]; |
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} |
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if (name) |
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strscpy(patch->name, name, sizeof(patch->name)); |
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return 0; |
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} |
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EXPORT_SYMBOL(snd_opl3_load_patch); |
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/* |
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* find a patch with the given program and bank numbers, returns its pointer |
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* if no matching patch is found and create_patch is set, it creates a |
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* new patch object. |
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*/ |
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struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank, |
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int create_patch) |
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{ |
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/* pretty dumb hash key */ |
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unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE; |
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struct fm_patch *patch; |
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for (patch = opl3->patch_table[key]; patch; patch = patch->next) { |
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if (patch->prog == prog && patch->bank == bank) |
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return patch; |
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} |
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if (!create_patch) |
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return NULL; |
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patch = kzalloc(sizeof(*patch), GFP_KERNEL); |
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if (!patch) |
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return NULL; |
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patch->prog = prog; |
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patch->bank = bank; |
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patch->next = opl3->patch_table[key]; |
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opl3->patch_table[key] = patch; |
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return patch; |
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} |
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EXPORT_SYMBOL(snd_opl3_find_patch); |
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/* |
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* Clear all patches of the given OPL3 instance |
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*/ |
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void snd_opl3_clear_patches(struct snd_opl3 *opl3) |
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{ |
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int i; |
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for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) { |
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struct fm_patch *patch, *next; |
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for (patch = opl3->patch_table[i]; patch; patch = next) { |
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next = patch->next; |
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kfree(patch); |
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} |
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} |
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memset(opl3->patch_table, 0, sizeof(opl3->patch_table)); |
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} |
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#endif /* OPL3_SUPPORT_SYNTH */ |
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/* ------------------------------ */ |
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void snd_opl3_reset(struct snd_opl3 * opl3) |
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{ |
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unsigned short opl3_reg; |
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unsigned short reg_side; |
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unsigned char voice_offset; |
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int max_voices, i; |
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max_voices = (opl3->hardware < OPL3_HW_OPL3) ? |
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MAX_OPL2_VOICES : MAX_OPL3_VOICES; |
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for (i = 0; i < max_voices; i++) { |
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/* Get register array side and offset of voice */ |
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if (i < MAX_OPL2_VOICES) { |
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/* Left register block for voices 0 .. 8 */ |
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reg_side = OPL3_LEFT; |
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voice_offset = i; |
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} else { |
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/* Right register block for voices 9 .. 17 */ |
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reg_side = OPL3_RIGHT; |
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voice_offset = i - MAX_OPL2_VOICES; |
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} |
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]); |
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opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */ |
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]); |
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opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */ |
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opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
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opl3->command(opl3, opl3_reg, 0x00); /* Note off */ |
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} |
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opl3->max_voices = MAX_OPL2_VOICES; |
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opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2; |
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opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT); |
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opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */ |
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opl3->rhythm = 0; |
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} |
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EXPORT_SYMBOL(snd_opl3_reset); |
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static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note) |
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{ |
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unsigned short reg_side; |
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unsigned char voice_offset; |
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unsigned short opl3_reg; |
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unsigned char reg_val; |
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/* Voices 0 - 8 in OPL2 mode */ |
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/* Voices 0 - 17 in OPL3 mode */ |
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if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ? |
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MAX_OPL3_VOICES : MAX_OPL2_VOICES)) |
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return -EINVAL; |
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/* Get register array side and offset of voice */ |
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if (note->voice < MAX_OPL2_VOICES) { |
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/* Left register block for voices 0 .. 8 */ |
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reg_side = OPL3_LEFT; |
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voice_offset = note->voice; |
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} else { |
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/* Right register block for voices 9 .. 17 */ |
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reg_side = OPL3_RIGHT; |
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voice_offset = note->voice - MAX_OPL2_VOICES; |
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} |
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/* Set lower 8 bits of note frequency */ |
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reg_val = (unsigned char) note->fnum; |
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opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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reg_val = 0x00; |
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/* Set output sound flag */ |
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if (note->key_on) |
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reg_val |= OPL3_KEYON_BIT; |
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/* Set octave */ |
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reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK; |
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/* Set higher 2 bits of note frequency */ |
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reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK; |
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/* Set OPL3 KEYON_BLOCK register of requested voice */ |
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opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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return 0; |
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} |
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static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice) |
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{ |
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unsigned short reg_side; |
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unsigned char op_offset; |
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unsigned char voice_offset, voice_op; |
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unsigned short opl3_reg; |
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unsigned char reg_val; |
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/* Only operators 1 and 2 */ |
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if (voice->op > 1) |
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return -EINVAL; |
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/* Voices 0 - 8 in OPL2 mode */ |
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/* Voices 0 - 17 in OPL3 mode */ |
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if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ? |
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MAX_OPL3_VOICES : MAX_OPL2_VOICES)) |
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return -EINVAL; |
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/* Get register array side and offset of voice */ |
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if (voice->voice < MAX_OPL2_VOICES) { |
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/* Left register block for voices 0 .. 8 */ |
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reg_side = OPL3_LEFT; |
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voice_offset = voice->voice; |
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} else { |
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/* Right register block for voices 9 .. 17 */ |
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reg_side = OPL3_RIGHT; |
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voice_offset = voice->voice - MAX_OPL2_VOICES; |
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} |
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/* Get register offset of operator */ |
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voice_offset = array_index_nospec(voice_offset, MAX_OPL2_VOICES); |
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voice_op = array_index_nospec(voice->op, 4); |
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op_offset = snd_opl3_regmap[voice_offset][voice_op]; |
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reg_val = 0x00; |
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/* Set amplitude modulation (tremolo) effect */ |
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if (voice->am) |
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reg_val |= OPL3_TREMOLO_ON; |
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/* Set vibrato effect */ |
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if (voice->vibrato) |
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reg_val |= OPL3_VIBRATO_ON; |
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/* Set sustaining sound phase */ |
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if (voice->do_sustain) |
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reg_val |= OPL3_SUSTAIN_ON; |
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/* Set keyboard scaling bit */ |
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if (voice->kbd_scale) |
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reg_val |= OPL3_KSR; |
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/* Set harmonic or frequency multiplier */ |
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reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK; |
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|
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/* Set OPL3 AM_VIB register of requested voice/operator */ |
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opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Set decreasing volume of higher notes */ |
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reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK; |
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/* Set output volume */ |
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reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK; |
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|
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/* Set OPL3 KSL_LEVEL register of requested voice/operator */ |
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Set attack phase level */ |
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reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK; |
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/* Set decay phase level */ |
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reg_val |= voice->decay & OPL3_DECAY_MASK; |
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/* Set OPL3 ATTACK_DECAY register of requested voice/operator */ |
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opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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/* Set sustain phase level */ |
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reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK; |
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/* Set release phase level */ |
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reg_val |= voice->release & OPL3_RELEASE_MASK; |
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|
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/* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ |
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opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Set inter-operator feedback */ |
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reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK; |
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/* Set inter-operator connection */ |
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if (voice->connection) |
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reg_val |= OPL3_CONNECTION_BIT; |
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/* OPL-3 only */ |
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if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) { |
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if (voice->left) |
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reg_val |= OPL3_VOICE_TO_LEFT; |
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if (voice->right) |
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reg_val |= OPL3_VOICE_TO_RIGHT; |
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} |
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/* Feedback/connection bits are applicable to voice */ |
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opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Select waveform */ |
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reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK; |
|
opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); |
|
opl3->command(opl3, opl3_reg, reg_val); |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params) |
|
{ |
|
unsigned char reg_val; |
|
|
|
reg_val = 0x00; |
|
/* Set keyboard split method */ |
|
if (params->kbd_split) |
|
reg_val |= OPL3_KEYBOARD_SPLIT; |
|
opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val); |
|
|
|
reg_val = 0x00; |
|
/* Set amplitude modulation (tremolo) depth */ |
|
if (params->am_depth) |
|
reg_val |= OPL3_TREMOLO_DEPTH; |
|
/* Set vibrato depth */ |
|
if (params->vib_depth) |
|
reg_val |= OPL3_VIBRATO_DEPTH; |
|
/* Set percussion mode */ |
|
if (params->rhythm) { |
|
reg_val |= OPL3_PERCUSSION_ENABLE; |
|
opl3->rhythm = 1; |
|
} else { |
|
opl3->rhythm = 0; |
|
} |
|
/* Play percussion instruments */ |
|
if (params->bass) |
|
reg_val |= OPL3_BASSDRUM_ON; |
|
if (params->snare) |
|
reg_val |= OPL3_SNAREDRUM_ON; |
|
if (params->tomtom) |
|
reg_val |= OPL3_TOMTOM_ON; |
|
if (params->cymbal) |
|
reg_val |= OPL3_CYMBAL_ON; |
|
if (params->hihat) |
|
reg_val |= OPL3_HIHAT_ON; |
|
|
|
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val); |
|
return 0; |
|
} |
|
|
|
static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode) |
|
{ |
|
if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3)) |
|
return -EINVAL; |
|
|
|
opl3->fm_mode = mode; |
|
if (opl3->hardware >= OPL3_HW_OPL3) |
|
opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */ |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection) |
|
{ |
|
unsigned char reg_val; |
|
|
|
/* OPL-3 only */ |
|
if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3) |
|
return -EINVAL; |
|
|
|
reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 | |
|
OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2); |
|
/* Set 4-op connections */ |
|
opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val); |
|
|
|
return 0; |
|
} |
|
|
|
|