From: Eliot Blennerhassett eliot@blennerhassett.gen.nz
Some cards have a so-called low-latency mode, in which they present a single multichannel stream with no mixing or samplerate conversion. In this mode the card can generate an interrupt per internal processing block (typically 32 or 64 frames)
Signed-off-by: Eliot Blennerhassett eliot@blennerhassett.gen.nz --- sound/pci/asihpi/asihpi.c | 177 +++++++++++++++++++++++++++++++++------- sound/pci/asihpi/hpi6205.c | 43 ++++++++-- sound/pci/asihpi/hpi_internal.h | 4 +- sound/pci/asihpi/hpicmn.h | 19 ++++- sound/pci/asihpi/hpioctl.c | 124 ++++++++++++++++++++++++++-- sound/pci/asihpi/hpios.h | 4 + 6 files changed, 321 insertions(+), 50 deletions(-)
diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c index 0752ba7..4200fec 100644 --- a/sound/pci/asihpi/asihpi.c +++ b/sound/pci/asihpi/asihpi.c @@ -1,6 +1,6 @@ /* * Asihpi soundcard - * Copyright (c) by AudioScience Inc alsa@audioscience.com + * Copyright (c) by AudioScience Inc support@audioscience.com * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -124,6 +124,16 @@ struct snd_card_asihpi { struct pci_dev *pci; struct hpi_adapter *hpi;
+ /* In low latency mode there is only one stream, a pointer to its + * private data is stored here on trigger and cleared on stop. + * The interrupt handler uses it as a parameter when calling + * snd_card_asihpi_timer_function(). + */ + struct snd_card_asihpi_pcm *llmode_streampriv; + struct tasklet_struct t; + void (*pcm_start)(struct snd_pcm_substream *substream); + void (*pcm_stop)(struct snd_pcm_substream *substream); + u32 h_mixer; struct clk_cache cc;
@@ -544,6 +554,48 @@ static void snd_card_asihpi_pcm_timer_stop(struct snd_pcm_substream *substream) del_timer(&dpcm->timer); }
+static void snd_card_asihpi_pcm_int_start(struct snd_pcm_substream *substream) +{ + struct snd_card_asihpi_pcm *dpcm; + struct snd_card_asihpi *card; + + BUG_ON(!substream); + + dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data; + card = snd_pcm_substream_chip(substream); + + BUG_ON(in_interrupt()); + tasklet_disable(&card->t); + card->llmode_streampriv = dpcm; + tasklet_enable(&card->t); + + hpi_handle_error(hpi_adapter_set_property(card->hpi->adapter->index, + HPI_ADAPTER_PROPERTY_IRQ_RATE, + card->update_interval_frames, 0)); +} + +static void snd_card_asihpi_pcm_int_stop(struct snd_pcm_substream *substream) +{ + struct snd_card_asihpi_pcm *dpcm; + struct snd_card_asihpi *card; + + BUG_ON(!substream); + + dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data; + card = snd_pcm_substream_chip(substream); + + hpi_handle_error(hpi_adapter_set_property(card->hpi->adapter->index, + HPI_ADAPTER_PROPERTY_IRQ_RATE, 0, 0)); + + if (in_interrupt()) + card->llmode_streampriv = NULL; + else { + tasklet_disable(&card->t); + card->llmode_streampriv = NULL; + tasklet_enable(&card->t); + } +} + static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream, int cmd) { @@ -602,7 +654,7 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream, break; } /* start the master stream */ - snd_card_asihpi_pcm_timer_start(substream); + card->pcm_start(substream); if ((substream->stream == SNDRV_PCM_STREAM_CAPTURE) || !card->can_dma) hpi_handle_error(hpi_stream_start(dpcm->h_stream)); @@ -610,7 +662,7 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream,
case SNDRV_PCM_TRIGGER_STOP: snd_printdd("%s trigger stop\n", name); - snd_card_asihpi_pcm_timer_stop(substream); + card->pcm_stop(substream); snd_pcm_group_for_each_entry(s, substream) { if (snd_pcm_substream_chip(s) != card) continue; @@ -641,12 +693,12 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream,
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_printdd("%s trigger pause release\n", name); + card->pcm_start(substream); hpi_handle_error(hpi_stream_start(dpcm->h_stream)); - snd_card_asihpi_pcm_timer_start(substream); break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_printdd("%s trigger pause push\n", name); - snd_card_asihpi_pcm_timer_stop(substream); + card->pcm_stop(substream); hpi_handle_error(hpi_stream_stop(dpcm->h_stream)); break; default: @@ -718,8 +770,8 @@ static void snd_card_asihpi_timer_function(unsigned long data) u32 buffer_size, bytes_avail, samples_played, on_card_bytes; char name[16];
- snd_pcm_debug_name(substream, name, sizeof(name));
+ snd_pcm_debug_name(substream, name, sizeof(name));
/* find minimum newdata and buffer pos in group */ snd_pcm_group_for_each_entry(s, substream) { @@ -782,7 +834,8 @@ static void snd_card_asihpi_timer_function(unsigned long data) newdata); }
- snd_printddd("timer1, %s, %d, S=%d, elap=%d, rw=%d, dsp=%d, left=%d, aux=%d, space=%d, hw_ptr=%ld, appl_ptr=%ld\n", + snd_printddd( + "timer1, %s, %d, S=%d, elap=%d, rw=%d, dsp=%d, left=%d, aux=%d, space=%d, hw_ptr=%ld, appl_ptr=%ld\n", name, s->number, state, ds->pcm_buf_elapsed_dma_ofs, ds->pcm_buf_host_rw_ofs, @@ -818,11 +871,13 @@ static void snd_card_asihpi_timer_function(unsigned long data)
snd_pcm_group_for_each_entry(s, substream) { struct snd_card_asihpi_pcm *ds = s->runtime->private_data; + runtime = s->runtime;
/* don't link Cap and Play */ if (substream->stream != s->stream) continue;
+ /* Store dma offset for use by pointer callback */ ds->pcm_buf_dma_ofs = pcm_buf_dma_ofs;
if (xfercount && @@ -881,16 +936,38 @@ static void snd_card_asihpi_timer_function(unsigned long data) pd, xfer2)); } } + /* ? host_rw_ofs always ahead of elapsed_dma_ofs by preload size? */ ds->pcm_buf_host_rw_ofs += xfercount; ds->pcm_buf_elapsed_dma_ofs += xfercount; snd_pcm_period_elapsed(s); } }
- if (dpcm->respawn_timer) + if (!card->hpi->interrupt_mode && dpcm->respawn_timer) add_timer(&dpcm->timer); }
+static void snd_card_asihpi_int_task(unsigned long data) +{ + struct hpi_adapter *a = (struct hpi_adapter *)data; + struct snd_card_asihpi *asihpi; + + WARN_ON(!a || !a->snd_card || !a->snd_card->private_data); + asihpi = (struct snd_card_asihpi *)a->snd_card->private_data; + if (asihpi->llmode_streampriv) + snd_card_asihpi_timer_function( + (unsigned long)asihpi->llmode_streampriv); +} + +static void snd_card_asihpi_isr(struct hpi_adapter *a) +{ + struct snd_card_asihpi *asihpi; + + WARN_ON(!a || !a->snd_card || !a->snd_card->private_data); + asihpi = (struct snd_card_asihpi *)a->snd_card->private_data; + tasklet_schedule(&asihpi->t); +} + /***************************** PLAYBACK OPS ****************/ static int snd_card_asihpi_playback_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) @@ -998,13 +1075,22 @@ static int snd_card_asihpi_playback_open(struct snd_pcm_substream *substream) runtime->private_free = snd_card_asihpi_runtime_free;
memset(&snd_card_asihpi_playback, 0, sizeof(snd_card_asihpi_playback)); - snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX; - snd_card_asihpi_playback.period_bytes_min = PERIOD_BYTES_MIN; - /*?snd_card_asihpi_playback.period_bytes_min = - card->out_max_chans * 4096; */ - snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; - snd_card_asihpi_playback.periods_min = PERIODS_MIN; - snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + if (!card->hpi->interrupt_mode) { + snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_playback.period_bytes_min = PERIOD_BYTES_MIN; + snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_playback.periods_min = PERIODS_MIN; + snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + } else { + size_t pbmin = card->update_interval_frames * + card->out_max_chans; + snd_card_asihpi_playback.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_playback.period_bytes_min = pbmin; + snd_card_asihpi_playback.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_playback.periods_min = PERIODS_MIN; + snd_card_asihpi_playback.periods_max = BUFFER_BYTES_MAX / pbmin; + } + /* snd_card_asihpi_playback.fifo_size = 0; */ snd_card_asihpi_playback.channels_max = card->out_max_chans; snd_card_asihpi_playback.channels_min = card->out_min_chans; @@ -1039,7 +1125,7 @@ static int snd_card_asihpi_playback_open(struct snd_pcm_substream *substream) card->update_interval_frames);
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, - card->update_interval_frames * 2, UINT_MAX); + card->update_interval_frames, UINT_MAX);
snd_printdd("playback open\n");
@@ -1105,8 +1191,6 @@ static int snd_card_asihpi_capture_prepare(struct snd_pcm_substream *substream) return 0; }
- - static u64 snd_card_asihpi_capture_formats(struct snd_card_asihpi *asihpi, u32 h_stream) { @@ -1173,11 +1257,21 @@ static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream) runtime->private_free = snd_card_asihpi_runtime_free;
memset(&snd_card_asihpi_capture, 0, sizeof(snd_card_asihpi_capture)); - snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX; - snd_card_asihpi_capture.period_bytes_min = PERIOD_BYTES_MIN; - snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; - snd_card_asihpi_capture.periods_min = PERIODS_MIN; - snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + if (!card->hpi->interrupt_mode) { + snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_capture.period_bytes_min = PERIOD_BYTES_MIN; + snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_capture.periods_min = PERIODS_MIN; + snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / PERIOD_BYTES_MIN; + } else { + size_t pbmin = card->update_interval_frames * + card->out_max_chans; + snd_card_asihpi_capture.buffer_bytes_max = BUFFER_BYTES_MAX; + snd_card_asihpi_capture.period_bytes_min = pbmin; + snd_card_asihpi_capture.period_bytes_max = BUFFER_BYTES_MAX / PERIODS_MIN; + snd_card_asihpi_capture.periods_min = PERIODS_MIN; + snd_card_asihpi_capture.periods_max = BUFFER_BYTES_MAX / pbmin; + } /* snd_card_asihpi_capture.fifo_size = 0; */ snd_card_asihpi_capture.channels_max = card->in_max_chans; snd_card_asihpi_capture.channels_min = card->in_min_chans; @@ -1202,7 +1296,7 @@ static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream) snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, card->update_interval_frames); snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, - card->update_interval_frames * 2, UINT_MAX); + card->update_interval_frames, UINT_MAX);
snd_pcm_set_sync(substream);
@@ -2447,15 +2541,19 @@ static int snd_asihpi_clkrate_get(struct snd_kcontrol *kcontrol, static int snd_asihpi_sampleclock_add(struct snd_card_asihpi *asihpi, struct hpi_control *hpi_ctl) { - struct snd_card *card = asihpi->card; + struct snd_card *card; struct snd_kcontrol_new snd_control;
- struct clk_cache *clkcache = &asihpi->cc; + struct clk_cache *clkcache; u32 hSC = hpi_ctl->h_control; int has_aes_in = 0; int i, j; u16 source;
+ if (snd_BUG_ON(!asihpi)) + return -EINVAL; + card = asihpi->card; + clkcache = &asihpi->cc; snd_control.private_value = hpi_ctl->h_control;
clkcache->has_local = 0; @@ -2811,6 +2909,7 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, asihpi->card = card; asihpi->pci = pci_dev; asihpi->hpi = hpi; + hpi->snd_card = card;
snd_printk(KERN_INFO "adapter ID=%4X index=%d\n", asihpi->hpi->adapter->type, adapter_index); @@ -2833,8 +2932,16 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, if (err) asihpi->update_interval_frames = 512;
- if (!asihpi->can_dma) - asihpi->update_interval_frames *= 2; + if (hpi->interrupt_mode) { + asihpi->pcm_start = snd_card_asihpi_pcm_int_start; + asihpi->pcm_stop = snd_card_asihpi_pcm_int_stop; + tasklet_init(&asihpi->t, snd_card_asihpi_int_task, + (unsigned long)hpi); + hpi->interrupt_callback = snd_card_asihpi_isr; + } else { + asihpi->pcm_start = snd_card_asihpi_pcm_timer_start; + asihpi->pcm_stop = snd_card_asihpi_pcm_timer_stop; + }
hpi_handle_error(hpi_instream_open(adapter_index, 0, &h_stream)); @@ -2844,6 +2951,9 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev,
hpi_handle_error(hpi_instream_close(h_stream));
+ if (!asihpi->can_dma) + asihpi->update_interval_frames *= 2; + err = hpi_adapter_get_property(adapter_index, HPI_ADAPTER_PROPERTY_CURCHANNELS, &asihpi->in_max_chans, &asihpi->out_max_chans); @@ -2903,7 +3013,6 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev, err = snd_card_register(card);
if (!err) { - hpi->snd_card = card; dev++; return 0; } @@ -2917,6 +3026,16 @@ __nodev: static void snd_asihpi_remove(struct pci_dev *pci_dev) { struct hpi_adapter *hpi = pci_get_drvdata(pci_dev); + struct snd_card_asihpi *asihpi = hpi->snd_card->private_data; + + /* Stop interrupts */ + if (hpi->interrupt_mode) { + hpi->interrupt_callback = NULL; + hpi_handle_error(hpi_adapter_set_property(hpi->adapter->index, + HPI_ADAPTER_PROPERTY_IRQ_RATE, 0, 0)); + tasklet_kill(&asihpi->t); + } + snd_card_free(hpi->snd_card); hpi->snd_card = NULL; asihpi_adapter_remove(pci_dev); diff --git a/sound/pci/asihpi/hpi6205.c b/sound/pci/asihpi/hpi6205.c index 4f28738..8d5abfa 100644 --- a/sound/pci/asihpi/hpi6205.c +++ b/sound/pci/asihpi/hpi6205.c @@ -1,7 +1,7 @@ /******************************************************************************
AudioScience HPI driver - Copyright (C) 1997-2011 AudioScience Inc. support@audioscience.com + Copyright (C) 1997-2014 AudioScience Inc. support@audioscience.com
This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as @@ -163,6 +163,9 @@ static u16 create_adapter_obj(struct hpi_adapter_obj *pao,
static void delete_adapter_obj(struct hpi_adapter_obj *pao);
+static int adapter_irq_query_and_clear(struct hpi_adapter_obj *pao, + u32 message); + static void outstream_host_buffer_allocate(struct hpi_adapter_obj *pao, struct hpi_message *phm, struct hpi_response *phr);
@@ -283,7 +286,6 @@ static void adapter_message(struct hpi_adapter_obj *pao, case HPI_ADAPTER_DELETE: adapter_delete(pao, phm, phr); break; - default: hw_message(pao, phm, phr); break; @@ -673,6 +675,12 @@ static u16 create_adapter_obj(struct hpi_adapter_obj *pao,
HPI_DEBUG_LOG(INFO, "bootload DSP OK\n");
+ pao->irq_query_and_clear = adapter_irq_query_and_clear; + pao->instream_host_buffer_status = + phw->p_interface_buffer->instream_host_buffer_status; + pao->outstream_host_buffer_status = + phw->p_interface_buffer->outstream_host_buffer_status; + return hpi_add_adapter(pao); }
@@ -713,6 +721,21 @@ static void delete_adapter_obj(struct hpi_adapter_obj *pao)
/*****************************************************************************/ /* Adapter functions */ +static int adapter_irq_query_and_clear(struct hpi_adapter_obj *pao, + u32 message) +{ + struct hpi_hw_obj *phw = pao->priv; + u32 hsr = 0; + + hsr = ioread32(phw->prHSR); + if (hsr & C6205_HSR_INTSRC) { + /* reset the interrupt from the DSP */ + iowrite32(C6205_HSR_INTSRC, phw->prHSR); + return HPI_IRQ_MIXER; + } + + return HPI_IRQ_NONE; +}
/*****************************************************************************/ /* OutStream Host buffer functions */ @@ -1331,17 +1354,21 @@ static u16 adapter_boot_load_dsp(struct hpi_adapter_obj *pao, if (boot_code_id[1] != 0) { /* DSP 1 is a C6713 */ /* CLKX0 <- '1' release the C6205 bootmode pulldowns */ - boot_loader_write_mem32(pao, 0, (0x018C0024L), 0x00002202); + boot_loader_write_mem32(pao, 0, 0x018C0024, 0x00002202); hpios_delay_micro_seconds(100); /* Reset the 6713 #1 - revB */ boot_loader_write_mem32(pao, 0, C6205_BAR0_TIMER1_CTL, 0); - - /* dummy read every 4 words for 6205 advisory 1.4.4 */ - boot_loader_read_mem32(pao, 0, 0); - + /* value of bit 3 is unknown after DSP reset, other bits shoudl be 0 */ + if (0 != (boot_loader_read_mem32(pao, 0, + (C6205_BAR0_TIMER1_CTL)) & ~8)) + return HPI6205_ERROR_6205_REG; hpios_delay_micro_seconds(100); + /* Release C6713 from reset - revB */ boot_loader_write_mem32(pao, 0, C6205_BAR0_TIMER1_CTL, 4); + if (4 != (boot_loader_read_mem32(pao, 0, + (C6205_BAR0_TIMER1_CTL)) & ~8)) + return HPI6205_ERROR_6205_REG; hpios_delay_micro_seconds(100); }
@@ -2089,7 +2116,7 @@ static u16 message_response_sequence(struct hpi_adapter_obj *pao, return 0; }
- /* Assume buffer of type struct bus_master_interface + /* Assume buffer of type struct bus_master_interface_62 is allocated "noncacheable" */
if (!wait_dsp_ack(phw, H620_HIF_IDLE, HPI6205_TIMEOUT)) { diff --git a/sound/pci/asihpi/hpi_internal.h b/sound/pci/asihpi/hpi_internal.h index c9bdc28..48380ce 100644 --- a/sound/pci/asihpi/hpi_internal.h +++ b/sound/pci/asihpi/hpi_internal.h @@ -686,8 +686,8 @@ union hpi_adapterx_msg { u16 value; } test_assert; struct { - u32 yes; - } irq_query; + u32 message; + } irq; u32 pad[3]; };
diff --git a/sound/pci/asihpi/hpicmn.h b/sound/pci/asihpi/hpicmn.h index e441212..46629c2 100644 --- a/sound/pci/asihpi/hpicmn.h +++ b/sound/pci/asihpi/hpicmn.h @@ -1,7 +1,7 @@ /**
AudioScience HPI driver - Copyright (C) 1997-2011 AudioScience Inc. support@audioscience.com + Copyright (C) 1997-2014 AudioScience Inc. support@audioscience.com
This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as @@ -21,7 +21,11 @@ struct hpi_adapter_obj;
/* a function that takes an adapter obj and returns an int */ -typedef int adapter_int_func(struct hpi_adapter_obj *pao); +typedef int adapter_int_func(struct hpi_adapter_obj *pao, u32 message); + +#define HPI_IRQ_NONE (0) +#define HPI_IRQ_MESSAGE (1) +#define HPI_IRQ_MIXER (2)
struct hpi_adapter_obj { struct hpi_pci pci; /* PCI info - bus#,dev#,address etc */ @@ -33,6 +37,9 @@ struct hpi_adapter_obj { u16 dsp_crashed; u16 has_control_cache; void *priv; + adapter_int_func *irq_query_and_clear; + struct hpi_hostbuffer_status *instream_host_buffer_status; + struct hpi_hostbuffer_status *outstream_host_buffer_status; };
struct hpi_control_cache { @@ -55,13 +62,21 @@ void hpi_delete_adapter(struct hpi_adapter_obj *pao);
short hpi_check_control_cache(struct hpi_control_cache *pC, struct hpi_message *phm, struct hpi_response *phr); + +short hpi_check_control_cache_single(struct hpi_control_cache_single *pC, + struct hpi_message *phm, struct hpi_response *phr); + struct hpi_control_cache *hpi_alloc_control_cache(const u32 number_of_controls, const u32 size_in_bytes, u8 *pDSP_control_buffer); + void hpi_free_control_cache(struct hpi_control_cache *p_cache);
void hpi_cmn_control_cache_sync_to_msg(struct hpi_control_cache *pC, struct hpi_message *phm, struct hpi_response *phr);
+void hpi_cmn_control_cache_sync_to_msg_single(struct hpi_control_cache_single + *pC, struct hpi_message *phm, struct hpi_response *phr); + u16 hpi_validate_response(struct hpi_message *phm, struct hpi_response *phr);
hpi_handler_func HPI_COMMON; diff --git a/sound/pci/asihpi/hpioctl.c b/sound/pci/asihpi/hpioctl.c index 7f02720..9454932 100644 --- a/sound/pci/asihpi/hpioctl.c +++ b/sound/pci/asihpi/hpioctl.c @@ -1,7 +1,8 @@ /******************************************************************************* - AudioScience HPI driver - Copyright (C) 1997-2011 AudioScience Inc. support@audioscience.com + Common Linux HPI ioctl and module probe/remove functions + + Copyright (C) 1997-2014 AudioScience Inc. support@audioscience.com
This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as @@ -12,11 +13,6 @@ 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 - -Common Linux HPI ioctl and module probe/remove functions *******************************************************************************/ #define SOURCEFILE_NAME "hpioctl.c"
@@ -29,6 +25,7 @@ Common Linux HPI ioctl and module probe/remove functions #include "hpicmn.h"
#include <linux/fs.h> +#include <linux/interrupt.h> #include <linux/slab.h> #include <linux/moduleparam.h> #include <asm/uaccess.h> @@ -307,10 +304,38 @@ out: return err; }
+static int asihpi_irq_count; + +static irqreturn_t asihpi_isr(int irq, void *dev_id) +{ + struct hpi_adapter *a = dev_id; + int handled; + + if (!a->adapter->irq_query_and_clear) { + pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type, + a->adapter->index); + return IRQ_NONE; + } + + handled = a->adapter->irq_query_and_clear(a->adapter, 0); + + if (!handled) + return IRQ_NONE; + + asihpi_irq_count++; + /* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n", + asihpi_irq_count, a->adapter->type, a->adapter->index); */ + + if (a->interrupt_callback) + a->interrupt_callback(a); + + return IRQ_HANDLED; +} + int asihpi_adapter_probe(struct pci_dev *pci_dev, const struct pci_device_id *pci_id) { - int idx, nm; + int idx, nm, low_latency_mode = 0, irq_supported = 0; int adapter_index; unsigned int memlen; struct hpi_message hm; @@ -388,8 +413,39 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev, hm.adapter_index = adapter.adapter->index; hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
- if (hr.error) + if (hr.error) { + HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n"); + goto err; + } + + /* Check if current mode == Low Latency mode */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_GET_MODE); + hm.adapter_index = adapter.adapter->index; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + + if (hr.error) { + HPI_DEBUG_LOG(ERROR, + "HPI_ADAPTER_GET_MODE failed, aborting\n"); goto err; + } + + if (hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY) + low_latency_mode = 1; + + /* Check if IRQs are supported */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_GET_PROPERTY); + hm.adapter_index = adapter.adapter->index; + hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + if (hr.error || !hr.u.ax.property_get.parameter1) { + dev_info(&pci_dev->dev, + "IRQs not supported by adapter at index %d\n", + adapter.adapter->index); + } else { + irq_supported = 1; + }
/* WARNING can't init mutex in 'adapter' * and then copy it to adapters[] ?!?! @@ -398,6 +454,44 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev, mutex_init(&adapters[adapter_index].mutex); pci_set_drvdata(pci_dev, &adapters[adapter_index]);
+ if (low_latency_mode && irq_supported) { + if (!adapter.adapter->irq_query_and_clear) { + dev_err(&pci_dev->dev, + "no IRQ handler for adapter %d, aborting\n", + adapter.adapter->index); + goto err; + } + + /* Disable IRQ generation on DSP side by setting the rate to 0 */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_SET_PROPERTY); + hm.adapter_index = adapter.adapter->index; + hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE; + hm.u.ax.property_set.parameter1 = 0; + hm.u.ax.property_set.parameter2 = 0; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + if (hr.error) { + HPI_DEBUG_LOG(ERROR, + "HPI_ADAPTER_GET_MODE failed, aborting\n"); + goto err; + } + + /* Note: request_irq calls asihpi_isr here */ + if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED, + "asihpi", &adapters[adapter_index])) { + dev_err(&pci_dev->dev, "request_irq(%d) failed\n", + pci_dev->irq); + goto err; + } + + adapters[adapter_index].interrupt_mode = 1; + + dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq); + adapters[adapter_index].irq = pci_dev->irq; + } else { + dev_info(&pci_dev->dev, "using polled mode\n"); + } + dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n", adapter.adapter->type, adapter_index);
@@ -431,6 +525,15 @@ void asihpi_adapter_remove(struct pci_dev *pci_dev) pa = pci_get_drvdata(pci_dev); pci = pa->adapter->pci;
+ /* Disable IRQ generation on DSP side */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_SET_PROPERTY); + hm.adapter_index = pa->adapter->index; + hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE; + hm.u.ax.property_set.parameter1 = 0; + hm.u.ax.property_set.parameter2 = 0; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, HPI_ADAPTER_DELETE); hm.adapter_index = pa->adapter->index; @@ -442,6 +545,9 @@ void asihpi_adapter_remove(struct pci_dev *pci_dev) iounmap(pci.ap_mem_base[idx]); }
+ if (pa->irq) + free_irq(pa->irq, pa); + if (pa->p_buffer) vfree(pa->p_buffer);
diff --git a/sound/pci/asihpi/hpios.h b/sound/pci/asihpi/hpios.h index d17d017..4e38360 100644 --- a/sound/pci/asihpi/hpios.h +++ b/sound/pci/asihpi/hpios.h @@ -151,6 +151,10 @@ struct hpi_adapter { struct hpi_adapter_obj *adapter; struct snd_card *snd_card;
+ int irq; + int interrupt_mode; + void (*interrupt_callback) (struct hpi_adapter *); + /* mutex prevents contention for one card between multiple user programs (via ioctl) */ struct mutex mutex;