diff options
Diffstat (limited to 'sound/hda/hdac_stream.c')
| -rw-r--r-- | sound/hda/hdac_stream.c | 1014 |
1 files changed, 0 insertions, 1014 deletions
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c deleted file mode 100644 index e7f6208af5b0..000000000000 --- a/sound/hda/hdac_stream.c +++ /dev/null @@ -1,1014 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * HD-audio stream operations - */ - -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/export.h> -#include <linux/clocksource.h> -#include <sound/compress_driver.h> -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/hdaudio.h> -#include <sound/hda_register.h> -#include "trace.h" - -/* - * the hdac_stream library is intended to be used with the following - * transitions. The states are not formally defined in the code but loosely - * inspired by boolean variables. Note that the 'prepared' field is not used - * in this library but by the callers during the hw_params/prepare transitions - * - * | - * stream_init() | - * v - * +--+-------+ - * | unused | - * +--+----+--+ - * | ^ - * stream_assign() | | stream_release() - * v | - * +--+----+--+ - * | opened | - * +--+----+--+ - * | ^ - * stream_reset() | | - * stream_setup() | | stream_cleanup() - * v | - * +--+----+--+ - * | prepared | - * +--+----+--+ - * | ^ - * stream_start() | | stream_stop() - * v | - * +--+----+--+ - * | running | - * +----------+ - */ - -/** - * snd_hdac_get_stream_stripe_ctl - get stripe control value - * @bus: HD-audio core bus - * @substream: PCM substream - */ -int snd_hdac_get_stream_stripe_ctl(struct hdac_bus *bus, - struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - unsigned int channels = runtime->channels, - rate = runtime->rate, - bits_per_sample = runtime->sample_bits, - max_sdo_lines, value, sdo_line; - - /* T_AZA_GCAP_NSDO is 1:2 bitfields in GCAP */ - max_sdo_lines = snd_hdac_chip_readl(bus, GCAP) & AZX_GCAP_NSDO; - - /* following is from HD audio spec */ - for (sdo_line = max_sdo_lines; sdo_line > 0; sdo_line >>= 1) { - if (rate > 48000) - value = (channels * bits_per_sample * - (rate / 48000)) / sdo_line; - else - value = (channels * bits_per_sample) / sdo_line; - - if (value >= bus->sdo_limit) - break; - } - - /* stripe value: 0 for 1SDO, 1 for 2SDO, 2 for 4SDO lines */ - return sdo_line >> 1; -} -EXPORT_SYMBOL_GPL(snd_hdac_get_stream_stripe_ctl); - -/** - * snd_hdac_stream_init - initialize each stream (aka device) - * @bus: HD-audio core bus - * @azx_dev: HD-audio core stream object to initialize - * @idx: stream index number - * @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE) - * @tag: the tag id to assign - * - * Assign the starting bdl address to each stream (device) and initialize. - */ -void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev, - int idx, int direction, int tag) -{ - azx_dev->bus = bus; - /* offset: SDI0=0x80, SDI1=0xa0, ... SDO3=0x160 */ - azx_dev->sd_addr = bus->remap_addr + (0x20 * idx + 0x80); - /* int mask: SDI0=0x01, SDI1=0x02, ... SDO3=0x80 */ - azx_dev->sd_int_sta_mask = 1 << idx; - azx_dev->index = idx; - azx_dev->direction = direction; - azx_dev->stream_tag = tag; - snd_hdac_dsp_lock_init(azx_dev); - list_add_tail(&azx_dev->list, &bus->stream_list); - - if (bus->spbcap) { - azx_dev->spib_addr = bus->spbcap + AZX_SPB_BASE + - AZX_SPB_INTERVAL * idx + - AZX_SPB_SPIB; - - azx_dev->fifo_addr = bus->spbcap + AZX_SPB_BASE + - AZX_SPB_INTERVAL * idx + - AZX_SPB_MAXFIFO; - } - - if (bus->drsmcap) - azx_dev->dpibr_addr = bus->drsmcap + AZX_DRSM_BASE + - AZX_DRSM_INTERVAL * idx; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_init); - -/** - * snd_hdac_stream_start - start a stream - * @azx_dev: HD-audio core stream to start - * - * Start a stream, set start_wallclk and set the running flag. - */ -void snd_hdac_stream_start(struct hdac_stream *azx_dev) -{ - struct hdac_bus *bus = azx_dev->bus; - int stripe_ctl; - - trace_snd_hdac_stream_start(bus, azx_dev); - - azx_dev->start_wallclk = snd_hdac_chip_readl(bus, WALLCLK); - - /* enable SIE */ - snd_hdac_chip_updatel(bus, INTCTL, - 1 << azx_dev->index, - 1 << azx_dev->index); - /* set stripe control */ - if (azx_dev->stripe) { - if (azx_dev->substream) - stripe_ctl = snd_hdac_get_stream_stripe_ctl(bus, azx_dev->substream); - else - stripe_ctl = 0; - snd_hdac_stream_updateb(azx_dev, SD_CTL_3B, SD_CTL_STRIPE_MASK, - stripe_ctl); - } - /* set DMA start and interrupt mask */ - if (bus->access_sdnctl_in_dword) - snd_hdac_stream_updatel(azx_dev, SD_CTL, - 0, SD_CTL_DMA_START | SD_INT_MASK); - else - snd_hdac_stream_updateb(azx_dev, SD_CTL, - 0, SD_CTL_DMA_START | SD_INT_MASK); - azx_dev->running = true; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_start); - -/** - * snd_hdac_stream_clear - helper to clear stream registers and stop DMA transfers - * @azx_dev: HD-audio core stream to stop - */ -static void snd_hdac_stream_clear(struct hdac_stream *azx_dev) -{ - snd_hdac_stream_updateb(azx_dev, SD_CTL, - SD_CTL_DMA_START | SD_INT_MASK, 0); - snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK); /* to be sure */ - if (azx_dev->stripe) - snd_hdac_stream_updateb(azx_dev, SD_CTL_3B, SD_CTL_STRIPE_MASK, 0); - azx_dev->running = false; -} - -/** - * snd_hdac_stream_stop - stop a stream - * @azx_dev: HD-audio core stream to stop - * - * Stop a stream DMA and disable stream interrupt - */ -void snd_hdac_stream_stop(struct hdac_stream *azx_dev) -{ - trace_snd_hdac_stream_stop(azx_dev->bus, azx_dev); - - snd_hdac_stream_clear(azx_dev); - /* disable SIE */ - snd_hdac_chip_updatel(azx_dev->bus, INTCTL, 1 << azx_dev->index, 0); -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_stop); - -/** - * snd_hdac_stop_streams - stop all streams - * @bus: HD-audio core bus - */ -void snd_hdac_stop_streams(struct hdac_bus *bus) -{ - struct hdac_stream *stream; - - list_for_each_entry(stream, &bus->stream_list, list) - snd_hdac_stream_stop(stream); -} -EXPORT_SYMBOL_GPL(snd_hdac_stop_streams); - -/** - * snd_hdac_stop_streams_and_chip - stop all streams and chip if running - * @bus: HD-audio core bus - */ -void snd_hdac_stop_streams_and_chip(struct hdac_bus *bus) -{ - - if (bus->chip_init) { - snd_hdac_stop_streams(bus); - snd_hdac_bus_stop_chip(bus); - } -} -EXPORT_SYMBOL_GPL(snd_hdac_stop_streams_and_chip); - -/** - * snd_hdac_stream_reset - reset a stream - * @azx_dev: HD-audio core stream to reset - */ -void snd_hdac_stream_reset(struct hdac_stream *azx_dev) -{ - unsigned char val; - int dma_run_state; - - snd_hdac_stream_clear(azx_dev); - - dma_run_state = snd_hdac_stream_readb(azx_dev, SD_CTL) & SD_CTL_DMA_START; - - snd_hdac_stream_updateb(azx_dev, SD_CTL, 0, SD_CTL_STREAM_RESET); - - /* wait for hardware to report that the stream entered reset */ - snd_hdac_stream_readb_poll(azx_dev, SD_CTL, val, (val & SD_CTL_STREAM_RESET), 3, 300); - - if (azx_dev->bus->dma_stop_delay && dma_run_state) - udelay(azx_dev->bus->dma_stop_delay); - - snd_hdac_stream_updateb(azx_dev, SD_CTL, SD_CTL_STREAM_RESET, 0); - - /* wait for hardware to report that the stream is out of reset */ - snd_hdac_stream_readb_poll(azx_dev, SD_CTL, val, !(val & SD_CTL_STREAM_RESET), 3, 300); - - /* reset first position - may not be synced with hw at this time */ - if (azx_dev->posbuf) - *azx_dev->posbuf = 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_reset); - -/** - * snd_hdac_stream_setup - set up the SD for streaming - * @azx_dev: HD-audio core stream to set up - * @code_loading: Whether the stream is for PCM or code-loading. - */ -int snd_hdac_stream_setup(struct hdac_stream *azx_dev, bool code_loading) -{ - struct hdac_bus *bus = azx_dev->bus; - struct snd_pcm_runtime *runtime; - unsigned int val; - u16 reg; - int ret; - - if (azx_dev->substream) - runtime = azx_dev->substream->runtime; - else - runtime = NULL; - /* make sure the run bit is zero for SD */ - snd_hdac_stream_clear(azx_dev); - /* program the stream_tag */ - val = snd_hdac_stream_readl(azx_dev, SD_CTL); - val = (val & ~SD_CTL_STREAM_TAG_MASK) | - (azx_dev->stream_tag << SD_CTL_STREAM_TAG_SHIFT); - if (!bus->snoop) - val |= SD_CTL_TRAFFIC_PRIO; - snd_hdac_stream_writel(azx_dev, SD_CTL, val); - - /* program the length of samples in cyclic buffer */ - snd_hdac_stream_writel(azx_dev, SD_CBL, azx_dev->bufsize); - - /* program the stream format */ - /* this value needs to be the same as the one programmed */ - snd_hdac_stream_writew(azx_dev, SD_FORMAT, azx_dev->format_val); - - /* program the stream LVI (last valid index) of the BDL */ - snd_hdac_stream_writew(azx_dev, SD_LVI, azx_dev->frags - 1); - - /* program the BDL address */ - /* lower BDL address */ - snd_hdac_stream_writel(azx_dev, SD_BDLPL, (u32)azx_dev->bdl.addr); - /* upper BDL address */ - snd_hdac_stream_writel(azx_dev, SD_BDLPU, - upper_32_bits(azx_dev->bdl.addr)); - - /* enable the position buffer */ - if (bus->use_posbuf && bus->posbuf.addr) { - if (!(snd_hdac_chip_readl(bus, DPLBASE) & AZX_DPLBASE_ENABLE)) - snd_hdac_chip_writel(bus, DPLBASE, - (u32)bus->posbuf.addr | AZX_DPLBASE_ENABLE); - } - - /* set the interrupt enable bits in the descriptor control register */ - snd_hdac_stream_updatel(azx_dev, SD_CTL, 0, SD_INT_MASK); - - if (!code_loading) { - /* Once SDxFMT is set, the controller programs SDxFIFOS to non-zero value. */ - ret = snd_hdac_stream_readw_poll(azx_dev, SD_FIFOSIZE, reg, - reg & AZX_SD_FIFOSIZE_MASK, 3, 300); - if (ret) - dev_dbg(bus->dev, "polling SD_FIFOSIZE 0x%04x failed: %d\n", - AZX_REG_SD_FIFOSIZE, ret); - azx_dev->fifo_size = reg; - } - - /* when LPIB delay correction gives a small negative value, - * we ignore it; currently set the threshold statically to - * 64 frames - */ - if (runtime && runtime->period_size > 64) - azx_dev->delay_negative_threshold = - -frames_to_bytes(runtime, 64); - else - azx_dev->delay_negative_threshold = 0; - - /* wallclk has 24Mhz clock source */ - if (runtime) - azx_dev->period_wallclk = (((runtime->period_size * 24000) / - runtime->rate) * 1000); - - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_setup); - -/** - * snd_hdac_stream_cleanup - cleanup a stream - * @azx_dev: HD-audio core stream to clean up - */ -void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev) -{ - snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0); - snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0); - snd_hdac_stream_writel(azx_dev, SD_CTL, 0); - azx_dev->bufsize = 0; - azx_dev->period_bytes = 0; - azx_dev->format_val = 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_cleanup); - -/** - * snd_hdac_stream_assign - assign a stream for the PCM - * @bus: HD-audio core bus - * @substream: PCM substream to assign - * - * Look for an unused stream for the given PCM substream, assign it - * and return the stream object. If no stream is free, returns NULL. - * The function tries to keep using the same stream object when it's used - * beforehand. Also, when bus->reverse_assign flag is set, the last free - * or matching entry is returned. This is needed for some strange codecs. - */ -struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus, - struct snd_pcm_substream *substream) -{ - struct hdac_stream *azx_dev; - struct hdac_stream *res = NULL; - - /* make a non-zero unique key for the substream */ - int key = (substream->number << 2) | (substream->stream + 1); - - if (substream->pcm) - key |= (substream->pcm->device << 16); - - spin_lock_irq(&bus->reg_lock); - list_for_each_entry(azx_dev, &bus->stream_list, list) { - if (azx_dev->direction != substream->stream) - continue; - if (azx_dev->opened) - continue; - if (azx_dev->assigned_key == key) { - res = azx_dev; - break; - } - if (!res || bus->reverse_assign) - res = azx_dev; - } - if (res) { - res->opened = 1; - res->running = 0; - res->assigned_key = key; - res->substream = substream; - } - spin_unlock_irq(&bus->reg_lock); - return res; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_assign); - -/** - * snd_hdac_stream_release_locked - release the assigned stream - * @azx_dev: HD-audio core stream to release - * - * Release the stream that has been assigned by snd_hdac_stream_assign(). - * The bus->reg_lock needs to be taken at a higher level - */ -void snd_hdac_stream_release_locked(struct hdac_stream *azx_dev) -{ - azx_dev->opened = 0; - azx_dev->running = 0; - azx_dev->substream = NULL; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_release_locked); - -/** - * snd_hdac_stream_release - release the assigned stream - * @azx_dev: HD-audio core stream to release - * - * Release the stream that has been assigned by snd_hdac_stream_assign(). - */ -void snd_hdac_stream_release(struct hdac_stream *azx_dev) -{ - struct hdac_bus *bus = azx_dev->bus; - - spin_lock_irq(&bus->reg_lock); - snd_hdac_stream_release_locked(azx_dev); - spin_unlock_irq(&bus->reg_lock); -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_release); - -/** - * snd_hdac_get_stream - return hdac_stream based on stream_tag and - * direction - * - * @bus: HD-audio core bus - * @dir: direction for the stream to be found - * @stream_tag: stream tag for stream to be found - */ -struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus, - int dir, int stream_tag) -{ - struct hdac_stream *s; - - list_for_each_entry(s, &bus->stream_list, list) { - if (s->direction == dir && s->stream_tag == stream_tag) - return s; - } - - return NULL; -} -EXPORT_SYMBOL_GPL(snd_hdac_get_stream); - -/* - * set up a BDL entry - */ -static int setup_bdle(struct hdac_bus *bus, - struct snd_dma_buffer *dmab, - struct hdac_stream *azx_dev, __le32 **bdlp, - int ofs, int size, int with_ioc) -{ - __le32 *bdl = *bdlp; - - while (size > 0) { - dma_addr_t addr; - int chunk; - - if (azx_dev->frags >= AZX_MAX_BDL_ENTRIES) - return -EINVAL; - - addr = snd_sgbuf_get_addr(dmab, ofs); - /* program the address field of the BDL entry */ - bdl[0] = cpu_to_le32((u32)addr); - bdl[1] = cpu_to_le32(upper_32_bits(addr)); - /* program the size field of the BDL entry */ - chunk = snd_sgbuf_get_chunk_size(dmab, ofs, size); - /* one BDLE cannot cross 4K boundary on CTHDA chips */ - if (bus->align_bdle_4k) { - u32 remain = 0x1000 - (ofs & 0xfff); - - if (chunk > remain) - chunk = remain; - } - bdl[2] = cpu_to_le32(chunk); - /* program the IOC to enable interrupt - * only when the whole fragment is processed - */ - size -= chunk; - bdl[3] = (size || !with_ioc) ? 0 : cpu_to_le32(0x01); - bdl += 4; - azx_dev->frags++; - ofs += chunk; - } - *bdlp = bdl; - return ofs; -} - -/** - * snd_hdac_stream_setup_bdle - set up BDL entries - * @azx_dev: HD-audio core stream to set up - * @dmab: allocated DMA buffer - * @runtime: substream runtime, optional - * - * Set up the buffer descriptor table of the given stream based on the - * period and buffer sizes of the assigned PCM substream. - */ -static int snd_hdac_stream_setup_bdle(struct hdac_stream *azx_dev, struct snd_dma_buffer *dmab, - struct snd_pcm_runtime *runtime) -{ - struct hdac_bus *bus = azx_dev->bus; - int i, ofs, periods, period_bytes; - int pos_adj, pos_align; - __le32 *bdl; - - /* reset BDL address */ - snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0); - snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0); - - period_bytes = azx_dev->period_bytes; - periods = azx_dev->bufsize / period_bytes; - - /* program the initial BDL entries */ - bdl = (__le32 *)azx_dev->bdl.area; - ofs = 0; - azx_dev->frags = 0; - - pos_adj = bus->bdl_pos_adj; - if (runtime && !azx_dev->no_period_wakeup && pos_adj > 0) { - pos_align = pos_adj; - pos_adj = DIV_ROUND_UP(pos_adj * runtime->rate, 48000); - if (!pos_adj) - pos_adj = pos_align; - else - pos_adj = roundup(pos_adj, pos_align); - pos_adj = frames_to_bytes(runtime, pos_adj); - if (pos_adj >= period_bytes) { - dev_warn(bus->dev, "Too big adjustment %d\n", - pos_adj); - pos_adj = 0; - } else { - ofs = setup_bdle(bus, dmab, azx_dev, - &bdl, ofs, pos_adj, true); - if (ofs < 0) - goto error; - } - } else - pos_adj = 0; - - for (i = 0; i < periods; i++) { - if (i == periods - 1 && pos_adj) - ofs = setup_bdle(bus, dmab, azx_dev, - &bdl, ofs, period_bytes - pos_adj, 0); - else - ofs = setup_bdle(bus, dmab, azx_dev, - &bdl, ofs, period_bytes, - !azx_dev->no_period_wakeup); - if (ofs < 0) - goto error; - } - return 0; - - error: - dev_dbg(bus->dev, "Too many BDL entries: buffer=%d, period=%d\n", - azx_dev->bufsize, period_bytes); - return -EINVAL; -} - -/** - * snd_hdac_stream_setup_periods - set up BDL entries - * @azx_dev: HD-audio core stream to set up - * - * Set up the buffer descriptor table of the given stream based on the - * period and buffer sizes of the assigned PCM substream. - */ -int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev) -{ - struct snd_pcm_substream *substream = azx_dev->substream; - struct snd_compr_stream *cstream = azx_dev->cstream; - struct snd_pcm_runtime *runtime = NULL; - struct snd_dma_buffer *dmab; - - if (substream) { - runtime = substream->runtime; - dmab = snd_pcm_get_dma_buf(substream); - } else if (cstream) { - dmab = snd_pcm_get_dma_buf(cstream); - } else { - WARN(1, "No substream or cstream assigned\n"); - return -EINVAL; - } - - return snd_hdac_stream_setup_bdle(azx_dev, dmab, runtime); -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_setup_periods); - -/** - * snd_hdac_stream_set_params - set stream parameters - * @azx_dev: HD-audio core stream for which parameters are to be set - * @format_val: format value parameter - * - * Setup the HD-audio core stream parameters from substream of the stream - * and passed format value - */ -int snd_hdac_stream_set_params(struct hdac_stream *azx_dev, - unsigned int format_val) -{ - struct snd_pcm_substream *substream = azx_dev->substream; - struct snd_compr_stream *cstream = azx_dev->cstream; - unsigned int bufsize, period_bytes; - unsigned int no_period_wakeup; - int err; - - if (substream) { - bufsize = snd_pcm_lib_buffer_bytes(substream); - period_bytes = snd_pcm_lib_period_bytes(substream); - no_period_wakeup = substream->runtime->no_period_wakeup; - } else if (cstream) { - bufsize = cstream->runtime->buffer_size; - period_bytes = cstream->runtime->fragment_size; - no_period_wakeup = 0; - } else { - return -EINVAL; - } - - if (bufsize != azx_dev->bufsize || - period_bytes != azx_dev->period_bytes || - format_val != azx_dev->format_val || - no_period_wakeup != azx_dev->no_period_wakeup) { - azx_dev->bufsize = bufsize; - azx_dev->period_bytes = period_bytes; - azx_dev->format_val = format_val; - azx_dev->no_period_wakeup = no_period_wakeup; - err = snd_hdac_stream_setup_periods(azx_dev); - if (err < 0) - return err; - } - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_set_params); - -static u64 azx_cc_read(const struct cyclecounter *cc) -{ - struct hdac_stream *azx_dev = container_of(cc, struct hdac_stream, cc); - - return snd_hdac_chip_readl(azx_dev->bus, WALLCLK); -} - -static void azx_timecounter_init(struct hdac_stream *azx_dev, - bool force, u64 last) -{ - struct timecounter *tc = &azx_dev->tc; - struct cyclecounter *cc = &azx_dev->cc; - u64 nsec; - - cc->read = azx_cc_read; - cc->mask = CLOCKSOURCE_MASK(32); - - /* - * Calculate the optimal mult/shift values. The counter wraps - * around after ~178.9 seconds. - */ - clocks_calc_mult_shift(&cc->mult, &cc->shift, 24000000, - NSEC_PER_SEC, 178); - - nsec = 0; /* audio time is elapsed time since trigger */ - timecounter_init(tc, cc, nsec); - if (force) { - /* - * force timecounter to use predefined value, - * used for synchronized starts - */ - tc->cycle_last = last; - } -} - -/** - * snd_hdac_stream_timecounter_init - initialize time counter - * @azx_dev: HD-audio core stream (master stream) - * @streams: bit flags of streams to set up - * @start: true for PCM trigger start, false for other cases - * - * Initializes the time counter of streams marked by the bit flags (each - * bit corresponds to the stream index). - * The trigger timestamp of PCM substream assigned to the given stream is - * updated accordingly, too. - */ -void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev, - unsigned int streams, bool start) -{ - struct hdac_bus *bus = azx_dev->bus; - struct snd_pcm_runtime *runtime = azx_dev->substream->runtime; - struct hdac_stream *s; - bool inited = false; - u64 cycle_last = 0; - - if (!start) - goto skip; - - list_for_each_entry(s, &bus->stream_list, list) { - if ((streams & (1 << s->index))) { - azx_timecounter_init(s, inited, cycle_last); - if (!inited) { - inited = true; - cycle_last = s->tc.cycle_last; - } - } - } - -skip: - snd_pcm_gettime(runtime, &runtime->trigger_tstamp); - runtime->trigger_tstamp_latched = true; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_timecounter_init); - -/** - * snd_hdac_stream_sync_trigger - turn on/off stream sync register - * @azx_dev: HD-audio core stream (master stream) - * @set: true = set, false = clear - * @streams: bit flags of streams to sync - * @reg: the stream sync register address - */ -void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set, - unsigned int streams, unsigned int reg) -{ - struct hdac_bus *bus = azx_dev->bus; - unsigned int val; - - if (!reg) - reg = AZX_REG_SSYNC; - val = _snd_hdac_chip_readl(bus, reg); - if (set) - val |= streams; - else - val &= ~streams; - _snd_hdac_chip_writel(bus, reg, val); -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_sync_trigger); - -/** - * snd_hdac_stream_sync - sync with start/stop trigger operation - * @azx_dev: HD-audio core stream (master stream) - * @start: true = start, false = stop - * @streams: bit flags of streams to sync - * - * For @start = true, wait until all FIFOs get ready. - * For @start = false, wait until all RUN bits are cleared. - */ -void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start, - unsigned int streams) -{ - struct hdac_bus *bus = azx_dev->bus; - int nwait, timeout; - struct hdac_stream *s; - - for (timeout = 5000; timeout; timeout--) { - nwait = 0; - list_for_each_entry(s, &bus->stream_list, list) { - if (!(streams & (1 << s->index))) - continue; - - if (start) { - /* check FIFO gets ready */ - if (!(snd_hdac_stream_readb(s, SD_STS) & - SD_STS_FIFO_READY)) - nwait++; - } else { - /* check RUN bit is cleared */ - if (snd_hdac_stream_readb(s, SD_CTL) & - SD_CTL_DMA_START) { - nwait++; - /* - * Perform stream reset if DMA RUN - * bit not cleared within given timeout - */ - if (timeout == 1) - snd_hdac_stream_reset(s); - } - } - } - if (!nwait) - break; - cpu_relax(); - } -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_sync); - -/** - * snd_hdac_stream_spbcap_enable - enable SPIB for a stream - * @bus: HD-audio core bus - * @enable: flag to enable/disable SPIB - * @index: stream index for which SPIB need to be enabled - */ -void snd_hdac_stream_spbcap_enable(struct hdac_bus *bus, - bool enable, int index) -{ - u32 mask = 0; - - if (!bus->spbcap) { - dev_err(bus->dev, "Address of SPB capability is NULL\n"); - return; - } - - mask |= (1 << index); - - if (enable) - snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, mask); - else - snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0); -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_spbcap_enable); - -/** - * snd_hdac_stream_set_spib - sets the spib value of a stream - * @bus: HD-audio core bus - * @azx_dev: hdac_stream - * @value: spib value to set - */ -int snd_hdac_stream_set_spib(struct hdac_bus *bus, - struct hdac_stream *azx_dev, u32 value) -{ - if (!bus->spbcap) { - dev_err(bus->dev, "Address of SPB capability is NULL\n"); - return -EINVAL; - } - - writel(value, azx_dev->spib_addr); - - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_set_spib); - -/** - * snd_hdac_stream_drsm_enable - enable DMA resume for a stream - * @bus: HD-audio core bus - * @enable: flag to enable/disable DRSM - * @index: stream index for which DRSM need to be enabled - */ -void snd_hdac_stream_drsm_enable(struct hdac_bus *bus, - bool enable, int index) -{ - u32 mask = 0; - - if (!bus->drsmcap) { - dev_err(bus->dev, "Address of DRSM capability is NULL\n"); - return; - } - - mask |= (1 << index); - - if (enable) - snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, mask); - else - snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0); -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_drsm_enable); - -/* - * snd_hdac_stream_wait_drsm - wait for HW to clear RSM for a stream - * @azx_dev: HD-audio core stream to await RSM for - * - * Returns 0 on success and -ETIMEDOUT upon a timeout. - */ -int snd_hdac_stream_wait_drsm(struct hdac_stream *azx_dev) -{ - struct hdac_bus *bus = azx_dev->bus; - u32 mask, reg; - int ret; - - mask = 1 << azx_dev->index; - - ret = read_poll_timeout(snd_hdac_reg_readl, reg, !(reg & mask), 250, 2000, false, bus, - bus->drsmcap + AZX_REG_DRSM_CTL); - if (ret) - dev_dbg(bus->dev, "polling RSM 0x%08x failed: %d\n", mask, ret); - return ret; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_wait_drsm); - -/** - * snd_hdac_stream_set_dpibr - sets the dpibr value of a stream - * @bus: HD-audio core bus - * @azx_dev: hdac_stream - * @value: dpib value to set - */ -int snd_hdac_stream_set_dpibr(struct hdac_bus *bus, - struct hdac_stream *azx_dev, u32 value) -{ - if (!bus->drsmcap) { - dev_err(bus->dev, "Address of DRSM capability is NULL\n"); - return -EINVAL; - } - - writel(value, azx_dev->dpibr_addr); - - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_set_dpibr); - -/** - * snd_hdac_stream_set_lpib - sets the lpib value of a stream - * @azx_dev: hdac_stream - * @value: lpib value to set - */ -int snd_hdac_stream_set_lpib(struct hdac_stream *azx_dev, u32 value) -{ - snd_hdac_stream_writel(azx_dev, SD_LPIB, value); - - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_stream_set_lpib); - -#ifdef CONFIG_SND_HDA_DSP_LOADER -/** - * snd_hdac_dsp_prepare - prepare for DSP loading - * @azx_dev: HD-audio core stream used for DSP loading - * @format: HD-audio stream format - * @byte_size: data chunk byte size - * @bufp: allocated buffer - * - * Allocate the buffer for the given size and set up the given stream for - * DSP loading. Returns the stream tag (>= 0), or a negative error code. - */ -int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format, - unsigned int byte_size, struct snd_dma_buffer *bufp) -{ - struct hdac_bus *bus = azx_dev->bus; - int err; - - snd_hdac_dsp_lock(azx_dev); - spin_lock_irq(&bus->reg_lock); - if (azx_dev->running || azx_dev->locked) { - spin_unlock_irq(&bus->reg_lock); - err = -EBUSY; - goto unlock; - } - azx_dev->locked = true; - spin_unlock_irq(&bus->reg_lock); - - err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, bus->dev, - byte_size, bufp); - if (err < 0) - goto err_alloc; - - azx_dev->substream = NULL; - azx_dev->bufsize = byte_size; - /* It is recommended to transfer the firmware in two or more chunks. */ - azx_dev->period_bytes = byte_size / 2; - azx_dev->format_val = format; - azx_dev->no_period_wakeup = 1; - - snd_hdac_stream_reset(azx_dev); - - err = snd_hdac_stream_setup_bdle(azx_dev, bufp, NULL); - if (err < 0) - goto error; - - snd_hdac_stream_setup(azx_dev, true); - snd_hdac_dsp_unlock(azx_dev); - return azx_dev->stream_tag; - - error: - snd_dma_free_pages(bufp); - err_alloc: - spin_lock_irq(&bus->reg_lock); - azx_dev->locked = false; - spin_unlock_irq(&bus->reg_lock); - unlock: - snd_hdac_dsp_unlock(azx_dev); - return err; -} -EXPORT_SYMBOL_GPL(snd_hdac_dsp_prepare); - -/** - * snd_hdac_dsp_trigger - start / stop DSP loading - * @azx_dev: HD-audio core stream used for DSP loading - * @start: trigger start or stop - */ -void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start) -{ - if (start) - snd_hdac_stream_start(azx_dev); - else - snd_hdac_stream_stop(azx_dev); -} -EXPORT_SYMBOL_GPL(snd_hdac_dsp_trigger); - -/** - * snd_hdac_dsp_cleanup - clean up the stream from DSP loading to normal - * @azx_dev: HD-audio core stream used for DSP loading - * @dmab: buffer used by DSP loading - */ -void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev, - struct snd_dma_buffer *dmab) -{ - struct hdac_bus *bus = azx_dev->bus; - - if (!dmab->area || !azx_dev->locked) - return; - - snd_hdac_dsp_lock(azx_dev); - /* reset BDL address */ - snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0); - snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0); - snd_hdac_stream_writel(azx_dev, SD_CTL, 0); - azx_dev->bufsize = 0; - azx_dev->period_bytes = 0; - azx_dev->format_val = 0; - - snd_dma_free_pages(dmab); - dmab->area = NULL; - - spin_lock_irq(&bus->reg_lock); - azx_dev->locked = false; - spin_unlock_irq(&bus->reg_lock); - snd_hdac_dsp_unlock(azx_dev); -} -EXPORT_SYMBOL_GPL(snd_hdac_dsp_cleanup); -#endif /* CONFIG_SND_HDA_DSP_LOADER */ |