| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Adrian McMenamin | 2687 | 94.58% | 2 | 6.67% |
| Takashi Iwai | 111 | 3.91% | 15 | 50.00% |
| Kees Cook | 22 | 0.77% | 1 | 3.33% |
| Ben Hutchings | 5 | 0.18% | 1 | 3.33% |
| Bhaktipriya Shridhar | 3 | 0.11% | 1 | 3.33% |
| Bhumika Goyal | 3 | 0.11% | 2 | 6.67% |
| Uwe Kleine-König | 2 | 0.07% | 1 | 3.33% |
| Paul Mundt | 2 | 0.07% | 2 | 6.67% |
| Thomas Gleixner | 2 | 0.07% | 1 | 3.33% |
| Arvind Yadav | 1 | 0.04% | 1 | 3.33% |
| Nick Andrew | 1 | 0.04% | 1 | 3.33% |
| Rusty Russell | 1 | 0.04% | 1 | 3.33% |
| Paul Gortmaker | 1 | 0.04% | 1 | 3.33% |
| Total | 2841 | 30 |
// SPDX-License-Identifier: GPL-2.0-only /* * * Copyright Adrian McMenamin 2005, 2006, 2007 * <adrian@mcmen.demon.co.uk> * Requires firmware (BSD licenced) available from: * http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/ * or the maintainer */ #include <linux/init.h> #include <linux/jiffies.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/wait.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/firmware.h> #include <linux/timer.h> #include <linux/delay.h> #include <linux/workqueue.h> #include <linux/io.h> #include <sound/core.h> #include <sound/control.h> #include <sound/pcm.h> #include <sound/initval.h> #include <sound/info.h> #include <asm/dma.h> #include <mach/sysasic.h> #include "aica.h" MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver"); MODULE_LICENSE("GPL"); MODULE_FIRMWARE("aica_firmware.bin"); /* module parameters */ #define CARD_NAME "AICA" static int index = -1; static char *id; static bool enable = 1; module_param(index, int, 0444); MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); module_param(id, charp, 0444); MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); module_param(enable, bool, 0644); MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard."); /* Simple platform device */ static struct platform_device *pd; static struct resource aica_memory_space[2] = { { .name = "AICA ARM CONTROL", .start = ARM_RESET_REGISTER, .flags = IORESOURCE_MEM, .end = ARM_RESET_REGISTER + 3, }, { .name = "AICA Sound RAM", .start = SPU_MEMORY_BASE, .flags = IORESOURCE_MEM, .end = SPU_MEMORY_BASE + 0x200000 - 1, }, }; /* SPU specific functions */ /* spu_write_wait - wait for G2-SH FIFO to clear */ static void spu_write_wait(void) { int time_count; time_count = 0; while (1) { if (!(readl(G2_FIFO) & 0x11)) break; /* To ensure hardware failure doesn't wedge kernel */ time_count++; if (time_count > 0x10000) { snd_printk ("WARNING: G2 FIFO appears to be blocked.\n"); break; } } } /* spu_memset - write to memory in SPU address space */ static void spu_memset(u32 toi, u32 what, int length) { int i; unsigned long flags; if (snd_BUG_ON(length % 4)) return; for (i = 0; i < length; i++) { if (!(i % 8)) spu_write_wait(); local_irq_save(flags); writel(what, toi + SPU_MEMORY_BASE); local_irq_restore(flags); toi++; } } /* spu_memload - write to SPU address space */ static void spu_memload(u32 toi, const void *from, int length) { unsigned long flags; const u32 *froml = from; u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi); int i; u32 val; length = DIV_ROUND_UP(length, 4); spu_write_wait(); for (i = 0; i < length; i++) { if (!(i % 8)) spu_write_wait(); val = *froml; local_irq_save(flags); writel(val, to); local_irq_restore(flags); froml++; to++; } } /* spu_disable - set spu registers to stop sound output */ static void spu_disable(void) { int i; unsigned long flags; u32 regval; spu_write_wait(); regval = readl(ARM_RESET_REGISTER); regval |= 1; spu_write_wait(); local_irq_save(flags); writel(regval, ARM_RESET_REGISTER); local_irq_restore(flags); for (i = 0; i < 64; i++) { spu_write_wait(); regval = readl(SPU_REGISTER_BASE + (i * 0x80)); regval = (regval & ~0x4000) | 0x8000; spu_write_wait(); local_irq_save(flags); writel(regval, SPU_REGISTER_BASE + (i * 0x80)); local_irq_restore(flags); } } /* spu_enable - set spu registers to enable sound output */ static void spu_enable(void) { unsigned long flags; u32 regval = readl(ARM_RESET_REGISTER); regval &= ~1; spu_write_wait(); local_irq_save(flags); writel(regval, ARM_RESET_REGISTER); local_irq_restore(flags); } /* * Halt the sound processor, clear the memory, * load some default ARM7 code, and then restart ARM7 */ static void spu_reset(void) { unsigned long flags; spu_disable(); spu_memset(0, 0, 0x200000 / 4); /* Put ARM7 in endless loop */ local_irq_save(flags); __raw_writel(0xea000002, SPU_MEMORY_BASE); local_irq_restore(flags); spu_enable(); } /* aica_chn_start - write to spu to start playback */ static void aica_chn_start(void) { unsigned long flags; spu_write_wait(); local_irq_save(flags); writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT); local_irq_restore(flags); } /* aica_chn_halt - write to spu to halt playback */ static void aica_chn_halt(void) { unsigned long flags; spu_write_wait(); local_irq_save(flags); writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT); local_irq_restore(flags); } /* ALSA code below */ static const struct snd_pcm_hardware snd_pcm_aica_playback_hw = { .info = (SNDRV_PCM_INFO_NONINTERLEAVED), .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_IMA_ADPCM), .rates = SNDRV_PCM_RATE_8000_48000, .rate_min = 8000, .rate_max = 48000, .channels_min = 1, .channels_max = 2, .buffer_bytes_max = AICA_BUFFER_SIZE, .period_bytes_min = AICA_PERIOD_SIZE, .period_bytes_max = AICA_PERIOD_SIZE, .periods_min = AICA_PERIOD_NUMBER, .periods_max = AICA_PERIOD_NUMBER, }; static int aica_dma_transfer(int channels, int buffer_size, struct snd_pcm_substream *substream) { int q, err, period_offset; struct snd_card_aica *dreamcastcard; struct snd_pcm_runtime *runtime; unsigned long flags; err = 0; dreamcastcard = substream->pcm->private_data; period_offset = dreamcastcard->clicks; period_offset %= (AICA_PERIOD_NUMBER / channels); runtime = substream->runtime; for (q = 0; q < channels; q++) { local_irq_save(flags); err = dma_xfer(AICA_DMA_CHANNEL, (unsigned long) (runtime->dma_area + (AICA_BUFFER_SIZE * q) / channels + AICA_PERIOD_SIZE * period_offset), AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET + AICA_PERIOD_SIZE * period_offset, buffer_size / channels, AICA_DMA_MODE); if (unlikely(err < 0)) { local_irq_restore(flags); break; } dma_wait_for_completion(AICA_DMA_CHANNEL); local_irq_restore(flags); } return err; } static void startup_aica(struct snd_card_aica *dreamcastcard) { spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, dreamcastcard->channel, sizeof(struct aica_channel)); aica_chn_start(); } static void run_spu_dma(struct work_struct *work) { int buffer_size; struct snd_pcm_runtime *runtime; struct snd_card_aica *dreamcastcard; dreamcastcard = container_of(work, struct snd_card_aica, spu_dma_work); runtime = dreamcastcard->substream->runtime; if (unlikely(dreamcastcard->dma_check == 0)) { buffer_size = frames_to_bytes(runtime, runtime->buffer_size); if (runtime->channels > 1) dreamcastcard->channel->flags |= 0x01; aica_dma_transfer(runtime->channels, buffer_size, dreamcastcard->substream); startup_aica(dreamcastcard); dreamcastcard->clicks = buffer_size / (AICA_PERIOD_SIZE * runtime->channels); return; } else { aica_dma_transfer(runtime->channels, AICA_PERIOD_SIZE * runtime->channels, dreamcastcard->substream); snd_pcm_period_elapsed(dreamcastcard->substream); dreamcastcard->clicks++; if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER)) dreamcastcard->clicks %= AICA_PERIOD_NUMBER; mod_timer(&dreamcastcard->timer, jiffies + 1); } } static void aica_period_elapsed(struct timer_list *t) { struct snd_card_aica *dreamcastcard = from_timer(dreamcastcard, t, timer); struct snd_pcm_substream *substream = dreamcastcard->substream; /*timer function - so cannot sleep */ int play_period; struct snd_pcm_runtime *runtime; runtime = substream->runtime; dreamcastcard = substream->pcm->private_data; /* Have we played out an additional period? */ play_period = frames_to_bytes(runtime, readl (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) / AICA_PERIOD_SIZE; if (play_period == dreamcastcard->current_period) { /* reschedule the timer */ mod_timer(&(dreamcastcard->timer), jiffies + 1); return; } if (runtime->channels > 1) dreamcastcard->current_period = play_period; if (unlikely(dreamcastcard->dma_check == 0)) dreamcastcard->dma_check = 1; schedule_work(&(dreamcastcard->spu_dma_work)); } static void spu_begin_dma(struct snd_pcm_substream *substream) { struct snd_card_aica *dreamcastcard; struct snd_pcm_runtime *runtime; runtime = substream->runtime; dreamcastcard = substream->pcm->private_data; /*get the queue to do the work */ schedule_work(&(dreamcastcard->spu_dma_work)); mod_timer(&dreamcastcard->timer, jiffies + 4); } static int snd_aicapcm_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime; struct aica_channel *channel; struct snd_card_aica *dreamcastcard; if (!enable) return -ENOENT; dreamcastcard = substream->pcm->private_data; channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL); if (!channel) return -ENOMEM; /* set defaults for channel */ channel->sfmt = SM_8BIT; channel->cmd = AICA_CMD_START; channel->vol = dreamcastcard->master_volume; channel->pan = 0x80; channel->pos = 0; channel->flags = 0; /* default to mono */ dreamcastcard->channel = channel; runtime = substream->runtime; runtime->hw = snd_pcm_aica_playback_hw; spu_enable(); dreamcastcard->clicks = 0; dreamcastcard->current_period = 0; dreamcastcard->dma_check = 0; return 0; } static int snd_aicapcm_pcm_close(struct snd_pcm_substream *substream) { struct snd_card_aica *dreamcastcard = substream->pcm->private_data; flush_work(&(dreamcastcard->spu_dma_work)); del_timer(&dreamcastcard->timer); dreamcastcard->substream = NULL; kfree(dreamcastcard->channel); spu_disable(); return 0; } static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_card_aica *dreamcastcard = substream->pcm->private_data; if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE) dreamcastcard->channel->sfmt = SM_16BIT; dreamcastcard->channel->freq = substream->runtime->rate; dreamcastcard->substream = substream; return 0; } static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { switch (cmd) { case SNDRV_PCM_TRIGGER_START: spu_begin_dma(substream); break; case SNDRV_PCM_TRIGGER_STOP: aica_chn_halt(); break; default: return -EINVAL; } return 0; } static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream *substream) { return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER); } static const struct snd_pcm_ops snd_aicapcm_playback_ops = { .open = snd_aicapcm_pcm_open, .close = snd_aicapcm_pcm_close, .prepare = snd_aicapcm_pcm_prepare, .trigger = snd_aicapcm_pcm_trigger, .pointer = snd_aicapcm_pcm_pointer, }; /* TO DO: set up to handle more than one pcm instance */ static int __init snd_aicapcmchip(struct snd_card_aica *dreamcastcard, int pcm_index) { struct snd_pcm *pcm; int err; /* AICA has no capture ability */ err = snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, &pcm); if (unlikely(err < 0)) return err; pcm->private_data = dreamcastcard; strcpy(pcm->name, "AICA PCM"); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_aicapcm_playback_ops); /* Allocate the DMA buffers */ snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, NULL, AICA_BUFFER_SIZE, AICA_BUFFER_SIZE); return 0; } /* Mixer controls */ #define aica_pcmswitch_info snd_ctl_boolean_mono_info static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { ucontrol->value.integer.value[0] = 1; /* TO DO: Fix me */ return 0; } static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { if (ucontrol->value.integer.value[0] == 1) return 0; /* TO DO: Fix me */ else aica_chn_halt(); return 0; } static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 1; uinfo->value.integer.min = 0; uinfo->value.integer.max = 0xFF; return 0; } static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_card_aica *dreamcastcard; dreamcastcard = kcontrol->private_data; if (unlikely(!dreamcastcard->channel)) return -ETXTBSY; /* we've not yet been set up */ ucontrol->value.integer.value[0] = dreamcastcard->channel->vol; return 0; } static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_card_aica *dreamcastcard; unsigned int vol; dreamcastcard = kcontrol->private_data; if (unlikely(!dreamcastcard->channel)) return -ETXTBSY; vol = ucontrol->value.integer.value[0]; if (vol > 0xff) return -EINVAL; if (unlikely(dreamcastcard->channel->vol == vol)) return 0; dreamcastcard->channel->vol = ucontrol->value.integer.value[0]; dreamcastcard->master_volume = ucontrol->value.integer.value[0]; spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, dreamcastcard->channel, sizeof(struct aica_channel)); return 1; } static const struct snd_kcontrol_new snd_aica_pcmswitch_control = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "PCM Playback Switch", .index = 0, .info = aica_pcmswitch_info, .get = aica_pcmswitch_get, .put = aica_pcmswitch_put }; static const struct snd_kcontrol_new snd_aica_pcmvolume_control = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "PCM Playback Volume", .index = 0, .info = aica_pcmvolume_info, .get = aica_pcmvolume_get, .put = aica_pcmvolume_put }; static int load_aica_firmware(void) { int err; const struct firmware *fw_entry; spu_reset(); err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev); if (unlikely(err)) return err; /* write firmware into memory */ spu_disable(); spu_memload(0, fw_entry->data, fw_entry->size); spu_enable(); release_firmware(fw_entry); return err; } static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard) { int err; err = snd_ctl_add (dreamcastcard->card, snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard)); if (unlikely(err < 0)) return err; err = snd_ctl_add (dreamcastcard->card, snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard)); if (unlikely(err < 0)) return err; return 0; } static void snd_aica_remove(struct platform_device *devptr) { struct snd_card_aica *dreamcastcard; dreamcastcard = platform_get_drvdata(devptr); snd_card_free(dreamcastcard->card); kfree(dreamcastcard); } static int snd_aica_probe(struct platform_device *devptr) { int err; struct snd_card_aica *dreamcastcard; dreamcastcard = kzalloc(sizeof(struct snd_card_aica), GFP_KERNEL); if (unlikely(!dreamcastcard)) return -ENOMEM; err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER, THIS_MODULE, 0, &dreamcastcard->card); if (unlikely(err < 0)) { kfree(dreamcastcard); return err; } strcpy(dreamcastcard->card->driver, "snd_aica"); strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER); strcpy(dreamcastcard->card->longname, "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast"); /* Prepare to use the queue */ INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma); timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0); /* Load the PCM 'chip' */ err = snd_aicapcmchip(dreamcastcard, 0); if (unlikely(err < 0)) goto freedreamcast; /* Add basic controls */ err = add_aicamixer_controls(dreamcastcard); if (unlikely(err < 0)) goto freedreamcast; /* Register the card with ALSA subsystem */ err = snd_card_register(dreamcastcard->card); if (unlikely(err < 0)) goto freedreamcast; platform_set_drvdata(devptr, dreamcastcard); snd_printk ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n"); return 0; freedreamcast: snd_card_free(dreamcastcard->card); kfree(dreamcastcard); return err; } static struct platform_driver snd_aica_driver = { .probe = snd_aica_probe, .remove_new = snd_aica_remove, .driver = { .name = SND_AICA_DRIVER, }, }; static int __init aica_init(void) { int err; err = platform_driver_register(&snd_aica_driver); if (unlikely(err < 0)) return err; pd = platform_device_register_simple(SND_AICA_DRIVER, -1, aica_memory_space, 2); if (IS_ERR(pd)) { platform_driver_unregister(&snd_aica_driver); return PTR_ERR(pd); } /* Load the firmware */ return load_aica_firmware(); } static void __exit aica_exit(void) { platform_device_unregister(pd); platform_driver_unregister(&snd_aica_driver); /* Kill any sound still playing and reset ARM7 to safe state */ spu_reset(); } module_init(aica_init); module_exit(aica_exit);
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