diff options
Diffstat (limited to 'sound/pci/hda/hda_controller.c')
| -rw-r--r-- | sound/pci/hda/hda_controller.c | 2031 |
1 files changed, 2031 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c new file mode 100644 index 000000000000..97993e17f46a --- /dev/null +++ b/sound/pci/hda/hda_controller.c @@ -0,0 +1,2031 @@ +/* + * + * Implementation of primary alsa driver code base for Intel HD Audio. + * + * Copyright(c) 2004 Intel Corporation. All rights reserved. + * + * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de> + * PeiSen Hou <pshou@realtek.com.tw> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * + */ + +#include <linux/clocksource.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/initval.h> +#include "hda_priv.h" +#include "hda_controller.h" + +#define CREATE_TRACE_POINTS +#include "hda_intel_trace.h" + +/* DSP lock helpers */ +#ifdef CONFIG_SND_HDA_DSP_LOADER +#define dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex) +#define dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex) +#define dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex) +#define dsp_is_locked(dev) ((dev)->locked) +#else +#define dsp_lock_init(dev) do {} while (0) +#define dsp_lock(dev) do {} while (0) +#define dsp_unlock(dev) do {} while (0) +#define dsp_is_locked(dev) 0 +#endif + +/* + * AZX stream operations. + */ + +/* start a stream */ +static void azx_stream_start(struct azx *chip, struct azx_dev *azx_dev) +{ + /* + * Before stream start, initialize parameter + */ + azx_dev->insufficient = 1; + + /* enable SIE */ + azx_writel(chip, INTCTL, + azx_readl(chip, INTCTL) | (1 << azx_dev->index)); + /* set DMA start and interrupt mask */ + azx_sd_writeb(chip, azx_dev, SD_CTL, + azx_sd_readb(chip, azx_dev, SD_CTL) | + SD_CTL_DMA_START | SD_INT_MASK); +} + +/* stop DMA */ +static void azx_stream_clear(struct azx *chip, struct azx_dev *azx_dev) +{ + azx_sd_writeb(chip, azx_dev, SD_CTL, + azx_sd_readb(chip, azx_dev, SD_CTL) & + ~(SD_CTL_DMA_START | SD_INT_MASK)); + azx_sd_writeb(chip, azx_dev, SD_STS, SD_INT_MASK); /* to be sure */ +} + +/* stop a stream */ +void azx_stream_stop(struct azx *chip, struct azx_dev *azx_dev) +{ + azx_stream_clear(chip, azx_dev); + /* disable SIE */ + azx_writel(chip, INTCTL, + azx_readl(chip, INTCTL) & ~(1 << azx_dev->index)); +} +EXPORT_SYMBOL_GPL(azx_stream_stop); + +/* reset stream */ +static void azx_stream_reset(struct azx *chip, struct azx_dev *azx_dev) +{ + unsigned char val; + int timeout; + + azx_stream_clear(chip, azx_dev); + + azx_sd_writeb(chip, azx_dev, SD_CTL, + azx_sd_readb(chip, azx_dev, SD_CTL) | + SD_CTL_STREAM_RESET); + udelay(3); + timeout = 300; + while (!((val = azx_sd_readb(chip, azx_dev, SD_CTL)) & + SD_CTL_STREAM_RESET) && --timeout) + ; + val &= ~SD_CTL_STREAM_RESET; + azx_sd_writeb(chip, azx_dev, SD_CTL, val); + udelay(3); + + timeout = 300; + /* waiting for hardware to report that the stream is out of reset */ + while (((val = azx_sd_readb(chip, azx_dev, SD_CTL)) & + SD_CTL_STREAM_RESET) && --timeout) + ; + + /* reset first position - may not be synced with hw at this time */ + *azx_dev->posbuf = 0; +} + +/* + * set up the SD for streaming + */ +static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev) +{ + unsigned int val; + /* make sure the run bit is zero for SD */ + azx_stream_clear(chip, azx_dev); + /* program the stream_tag */ + val = azx_sd_readl(chip, azx_dev, SD_CTL); + val = (val & ~SD_CTL_STREAM_TAG_MASK) | + (azx_dev->stream_tag << SD_CTL_STREAM_TAG_SHIFT); + if (!azx_snoop(chip)) + val |= SD_CTL_TRAFFIC_PRIO; + azx_sd_writel(chip, azx_dev, SD_CTL, val); + + /* program the length of samples in cyclic buffer */ + azx_sd_writel(chip, azx_dev, SD_CBL, azx_dev->bufsize); + + /* program the stream format */ + /* this value needs to be the same as the one programmed */ + azx_sd_writew(chip, azx_dev, SD_FORMAT, azx_dev->format_val); + + /* program the stream LVI (last valid index) of the BDL */ + azx_sd_writew(chip, azx_dev, SD_LVI, azx_dev->frags - 1); + + /* program the BDL address */ + /* lower BDL address */ + azx_sd_writel(chip, azx_dev, SD_BDLPL, (u32)azx_dev->bdl.addr); + /* upper BDL address */ + azx_sd_writel(chip, azx_dev, SD_BDLPU, + upper_32_bits(azx_dev->bdl.addr)); + + /* enable the position buffer */ + if (chip->position_fix[0] != POS_FIX_LPIB || + chip->position_fix[1] != POS_FIX_LPIB) { + if (!(azx_readl(chip, DPLBASE) & ICH6_DPLBASE_ENABLE)) + azx_writel(chip, DPLBASE, + (u32)chip->posbuf.addr | ICH6_DPLBASE_ENABLE); + } + + /* set the interrupt enable bits in the descriptor control register */ + azx_sd_writel(chip, azx_dev, SD_CTL, + azx_sd_readl(chip, azx_dev, SD_CTL) | SD_INT_MASK); + + return 0; +} + +/* assign a stream for the PCM */ +static inline struct azx_dev * +azx_assign_device(struct azx *chip, struct snd_pcm_substream *substream) +{ + int dev, i, nums; + struct azx_dev *res = NULL; + /* make a non-zero unique key for the substream */ + int key = (substream->pcm->device << 16) | (substream->number << 2) | + (substream->stream + 1); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + dev = chip->playback_index_offset; + nums = chip->playback_streams; + } else { + dev = chip->capture_index_offset; + nums = chip->capture_streams; + } + for (i = 0; i < nums; i++, dev++) { + struct azx_dev *azx_dev = &chip->azx_dev[dev]; + dsp_lock(azx_dev); + if (!azx_dev->opened && !dsp_is_locked(azx_dev)) { + res = azx_dev; + if (res->assigned_key == key) { + res->opened = 1; + res->assigned_key = key; + dsp_unlock(azx_dev); + return azx_dev; + } + } + dsp_unlock(azx_dev); + } + if (res) { + dsp_lock(res); + res->opened = 1; + res->assigned_key = key; + dsp_unlock(res); + } + return res; +} + +/* release the assigned stream */ +static inline void azx_release_device(struct azx_dev *azx_dev) +{ + azx_dev->opened = 0; +} + +static cycle_t azx_cc_read(const struct cyclecounter *cc) +{ + struct azx_dev *azx_dev = container_of(cc, struct azx_dev, azx_cc); + struct snd_pcm_substream *substream = azx_dev->substream; + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx *chip = apcm->chip; + + return azx_readl(chip, WALLCLK); +} + +static void azx_timecounter_init(struct snd_pcm_substream *substream, + bool force, cycle_t last) +{ + struct azx_dev *azx_dev = get_azx_dev(substream); + struct timecounter *tc = &azx_dev->azx_tc; + struct cyclecounter *cc = &azx_dev->azx_cc; + u64 nsec; + + cc->read = azx_cc_read; + cc->mask = CLOCKSOURCE_MASK(32); + + /* + * Converting from 24 MHz to ns means applying a 125/3 factor. + * To avoid any saturation issues in intermediate operations, + * the 125 factor is applied first. The division is applied + * last after reading the timecounter value. + * Applying the 1/3 factor as part of the multiplication + * requires at least 20 bits for a decent precision, however + * overflows occur after about 4 hours or less, not a option. + */ + + cc->mult = 125; /* saturation after 195 years */ + cc->shift = 0; + + 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; +} + +static u64 azx_adjust_codec_delay(struct snd_pcm_substream *substream, + u64 nsec) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream]; + u64 codec_frames, codec_nsecs; + + if (!hinfo->ops.get_delay) + return nsec; + + codec_frames = hinfo->ops.get_delay(hinfo, apcm->codec, substream); + codec_nsecs = div_u64(codec_frames * 1000000000LL, + substream->runtime->rate); + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + return nsec + codec_nsecs; + + return (nsec > codec_nsecs) ? nsec - codec_nsecs : 0; +} + +/* + * set up a BDL entry + */ +static int setup_bdle(struct azx *chip, + struct snd_dma_buffer *dmab, + struct azx_dev *azx_dev, u32 **bdlp, + int ofs, int size, int with_ioc) +{ + u32 *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 (chip->driver_caps & AZX_DCAPS_4K_BDLE_BOUNDARY) { + 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; +} + +/* + * set up BDL entries + */ +static int azx_setup_periods(struct azx *chip, + struct snd_pcm_substream *substream, + struct azx_dev *azx_dev) +{ + u32 *bdl; + int i, ofs, periods, period_bytes; + int pos_adj = 0; + + /* reset BDL address */ + azx_sd_writel(chip, azx_dev, SD_BDLPL, 0); + azx_sd_writel(chip, azx_dev, SD_BDLPU, 0); + + period_bytes = azx_dev->period_bytes; + periods = azx_dev->bufsize / period_bytes; + + /* program the initial BDL entries */ + bdl = (u32 *)azx_dev->bdl.area; + ofs = 0; + azx_dev->frags = 0; + + if (chip->bdl_pos_adj) + pos_adj = chip->bdl_pos_adj[chip->dev_index]; + if (!azx_dev->no_period_wakeup && pos_adj > 0) { + struct snd_pcm_runtime *runtime = substream->runtime; + int pos_align = pos_adj; + pos_adj = (pos_adj * runtime->rate + 47999) / 48000; + if (!pos_adj) + pos_adj = pos_align; + else + pos_adj = ((pos_adj + pos_align - 1) / pos_align) * + pos_align; + pos_adj = frames_to_bytes(runtime, pos_adj); + if (pos_adj >= period_bytes) { + dev_warn(chip->card->dev,"Too big adjustment %d\n", + pos_adj); + pos_adj = 0; + } else { + ofs = setup_bdle(chip, snd_pcm_get_dma_buf(substream), + 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(chip, snd_pcm_get_dma_buf(substream), + azx_dev, &bdl, ofs, + period_bytes - pos_adj, 0); + else + ofs = setup_bdle(chip, snd_pcm_get_dma_buf(substream), + azx_dev, &bdl, ofs, + period_bytes, + !azx_dev->no_period_wakeup); + if (ofs < 0) + goto error; + } + return 0; + + error: + dev_err(chip->card->dev, "Too many BDL entries: buffer=%d, period=%d\n", + azx_dev->bufsize, period_bytes); + return -EINVAL; +} + +/* + * PCM ops + */ + +static int azx_pcm_close(struct snd_pcm_substream *substream) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream]; + struct azx *chip = apcm->chip; + struct azx_dev *azx_dev = get_azx_dev(substream); + unsigned long flags; + + mutex_lock(&chip->open_mutex); + spin_lock_irqsave(&chip->reg_lock, flags); + azx_dev->substream = NULL; + azx_dev->running = 0; + spin_unlock_irqrestore(&chip->reg_lock, flags); + azx_release_device(azx_dev); + hinfo->ops.close(hinfo, apcm->codec, substream); + snd_hda_power_down(apcm->codec); + mutex_unlock(&chip->open_mutex); + return 0; +} + +static int azx_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx *chip = apcm->chip; + int ret; + + dsp_lock(get_azx_dev(substream)); + if (dsp_is_locked(get_azx_dev(substream))) { + ret = -EBUSY; + goto unlock; + } + + ret = chip->ops->substream_alloc_pages(chip, substream, + params_buffer_bytes(hw_params)); +unlock: + dsp_unlock(get_azx_dev(substream)); + return ret; +} + +static int azx_pcm_hw_free(struct snd_pcm_substream *substream) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx_dev *azx_dev = get_azx_dev(substream); + struct azx *chip = apcm->chip; + struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream]; + int err; + + /* reset BDL address */ + dsp_lock(azx_dev); + if (!dsp_is_locked(azx_dev)) { + azx_sd_writel(chip, azx_dev, SD_BDLPL, 0); + azx_sd_writel(chip, azx_dev, SD_BDLPU, 0); + azx_sd_writel(chip, azx_dev, SD_CTL, 0); + azx_dev->bufsize = 0; + azx_dev->period_bytes = 0; + azx_dev->format_val = 0; + } + + snd_hda_codec_cleanup(apcm->codec, hinfo, substream); + + err = chip->ops->substream_free_pages(chip, substream); + azx_dev->prepared = 0; + dsp_unlock(azx_dev); + return err; +} + +static int azx_pcm_prepare(struct snd_pcm_substream *substream) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx *chip = apcm->chip; + struct azx_dev *azx_dev = get_azx_dev(substream); + struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream]; + struct snd_pcm_runtime *runtime = substream->runtime; + unsigned int bufsize, period_bytes, format_val, stream_tag; + int err; + struct hda_spdif_out *spdif = + snd_hda_spdif_out_of_nid(apcm->codec, hinfo->nid); + unsigned short ctls = spdif ? spdif->ctls : 0; + + dsp_lock(azx_dev); + if (dsp_is_locked(azx_dev)) { + err = -EBUSY; + goto unlock; + } + + azx_stream_reset(chip, azx_dev); + format_val = snd_hda_calc_stream_format(runtime->rate, + runtime->channels, + runtime->format, + hinfo->maxbps, + ctls); + if (!format_val) { + dev_err(chip->card->dev, + "invalid format_val, rate=%d, ch=%d, format=%d\n", + runtime->rate, runtime->channels, runtime->format); + err = -EINVAL; + goto unlock; + } + + bufsize = snd_pcm_lib_buffer_bytes(substream); + period_bytes = snd_pcm_lib_period_bytes(substream); + + dev_dbg(chip->card->dev, "azx_pcm_prepare: bufsize=0x%x, format=0x%x\n", + bufsize, format_val); + + if (bufsize != azx_dev->bufsize || + period_bytes != azx_dev->period_bytes || + format_val != azx_dev->format_val || + runtime->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 = runtime->no_period_wakeup; + err = azx_setup_periods(chip, substream, azx_dev); + if (err < 0) + goto unlock; + } + + /* when LPIB delay correction gives a small negative value, + * we ignore it; currently set the threshold statically to + * 64 frames + */ + if (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 */ + azx_dev->period_wallclk = (((runtime->period_size * 24000) / + runtime->rate) * 1000); + azx_setup_controller(chip, azx_dev); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + azx_dev->fifo_size = + azx_sd_readw(chip, azx_dev, SD_FIFOSIZE) + 1; + else + azx_dev->fifo_size = 0; + + stream_tag = azx_dev->stream_tag; + /* CA-IBG chips need the playback stream starting from 1 */ + if ((chip->driver_caps & AZX_DCAPS_CTX_WORKAROUND) && + stream_tag > chip->capture_streams) + stream_tag -= chip->capture_streams; + err = snd_hda_codec_prepare(apcm->codec, hinfo, stream_tag, + azx_dev->format_val, substream); + + unlock: + if (!err) + azx_dev->prepared = 1; + dsp_unlock(azx_dev); + return err; +} + +static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx *chip = apcm->chip; + struct azx_dev *azx_dev; + struct snd_pcm_substream *s; + int rstart = 0, start, nsync = 0, sbits = 0; + int nwait, timeout; + + azx_dev = get_azx_dev(substream); + trace_azx_pcm_trigger(chip, azx_dev, cmd); + + if (dsp_is_locked(azx_dev) || !azx_dev->prepared) + return -EPIPE; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + rstart = 1; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + start = 1; + break; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_STOP: + start = 0; + break; + default: + return -EINVAL; + } + + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + azx_dev = get_azx_dev(s); + sbits |= 1 << azx_dev->index; + nsync++; + snd_pcm_trigger_done(s, substream); + } + + spin_lock(&chip->reg_lock); + + /* first, set SYNC bits of corresponding streams */ + if (chip->driver_caps & AZX_DCAPS_OLD_SSYNC) + azx_writel(chip, OLD_SSYNC, + azx_readl(chip, OLD_SSYNC) | sbits); + else + azx_writel(chip, SSYNC, azx_readl(chip, SSYNC) | sbits); + + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + azx_dev = get_azx_dev(s); + if (start) { + azx_dev->start_wallclk = azx_readl(chip, WALLCLK); + if (!rstart) + azx_dev->start_wallclk -= + azx_dev->period_wallclk; + azx_stream_start(chip, azx_dev); + } else { + azx_stream_stop(chip, azx_dev); + } + azx_dev->running = start; + } + spin_unlock(&chip->reg_lock); + if (start) { + /* wait until all FIFOs get ready */ + for (timeout = 5000; timeout; timeout--) { + nwait = 0; + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + azx_dev = get_azx_dev(s); + if (!(azx_sd_readb(chip, azx_dev, SD_STS) & + SD_STS_FIFO_READY)) + nwait++; + } + if (!nwait) + break; + cpu_relax(); + } + } else { + /* wait until all RUN bits are cleared */ + for (timeout = 5000; timeout; timeout--) { + nwait = 0; + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + azx_dev = get_azx_dev(s); + if (azx_sd_readb(chip, azx_dev, SD_CTL) & + SD_CTL_DMA_START) + nwait++; + } + if (!nwait) + break; + cpu_relax(); + } + } + spin_lock(&chip->reg_lock); + /* reset SYNC bits */ + if (chip->driver_caps & AZX_DCAPS_OLD_SSYNC) + azx_writel(chip, OLD_SSYNC, + azx_readl(chip, OLD_SSYNC) & ~sbits); + else + azx_writel(chip, SSYNC, azx_readl(chip, SSYNC) & ~sbits); + if (start) { + azx_timecounter_init(substream, 0, 0); + if (nsync > 1) { + cycle_t cycle_last; + + /* same start cycle for master and group */ + azx_dev = get_azx_dev(substream); + cycle_last = azx_dev->azx_tc.cycle_last; + + snd_pcm_group_for_each_entry(s, substream) { + if (s->pcm->card != substream->pcm->card) + continue; + azx_timecounter_init(s, 1, cycle_last); + } + } + } + spin_unlock(&chip->reg_lock); + return 0; +} + +/* get the current DMA position with correction on VIA chips */ +static unsigned int azx_via_get_position(struct azx *chip, + struct azx_dev *azx_dev) +{ + unsigned int link_pos, mini_pos, bound_pos; + unsigned int mod_link_pos, mod_dma_pos, mod_mini_pos; + unsigned int fifo_size; + + link_pos = azx_sd_readl(chip, azx_dev, SD_LPIB); + if (azx_dev->substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + /* Playback, no problem using link position */ + return link_pos; + } + + /* Capture */ + /* For new chipset, + * use mod to get the DMA position just like old chipset + */ + mod_dma_pos = le32_to_cpu(*azx_dev->posbuf); + mod_dma_pos %= azx_dev->period_bytes; + + /* azx_dev->fifo_size can't get FIFO size of in stream. + * Get from base address + offset. + */ + fifo_size = readw(chip->remap_addr + VIA_IN_STREAM0_FIFO_SIZE_OFFSET); + + if (azx_dev->insufficient) { + /* Link position never gather than FIFO size */ + if (link_pos <= fifo_size) + return 0; + + azx_dev->insufficient = 0; + } + + if (link_pos <= fifo_size) + mini_pos = azx_dev->bufsize + link_pos - fifo_size; + else + mini_pos = link_pos - fifo_size; + + /* Find nearest previous boudary */ + mod_mini_pos = mini_pos % azx_dev->period_bytes; + mod_link_pos = link_pos % azx_dev->period_bytes; + if (mod_link_pos >= fifo_size) + bound_pos = link_pos - mod_link_pos; + else if (mod_dma_pos >= mod_mini_pos) + bound_pos = mini_pos - mod_mini_pos; + else { + bound_pos = mini_pos - mod_mini_pos + azx_dev->period_bytes; + if (bound_pos >= azx_dev->bufsize) + bound_pos = 0; + } + + /* Calculate real DMA position we want */ + return bound_pos + mod_dma_pos; +} + +unsigned int azx_get_position(struct azx *chip, + struct azx_dev *azx_dev, + bool with_check) +{ + struct snd_pcm_substream *substream = azx_dev->substream; + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + unsigned int pos; + int stream = substream->stream; + struct hda_pcm_stream *hinfo = apcm->hinfo[stream]; + int delay = 0; + + switch (chip->position_fix[stream]) { + case POS_FIX_LPIB: + /* read LPIB */ + pos = azx_sd_readl(chip, azx_dev, SD_LPIB); + break; + case POS_FIX_VIACOMBO: + pos = azx_via_get_position(chip, azx_dev); + break; + default: + /* use the position buffer */ + pos = le32_to_cpu(*azx_dev->posbuf); + if (with_check && chip->position_fix[stream] == POS_FIX_AUTO) { + if (!pos || pos == (u32)-1) { + dev_info(chip->card->dev, + "Invalid position buffer, using LPIB read method instead.\n"); + chip->position_fix[stream] = POS_FIX_LPIB; + pos = azx_sd_readl(chip, azx_dev, SD_LPIB); + } else + chip->position_fix[stream] = POS_FIX_POSBUF; + } + break; + } + + if (pos >= azx_dev->bufsize) + pos = 0; + + /* calculate runtime delay from LPIB */ + if (substream->runtime && + chip->position_fix[stream] == POS_FIX_POSBUF && + (chip->driver_caps & AZX_DCAPS_COUNT_LPIB_DELAY)) { + unsigned int lpib_pos = azx_sd_readl(chip, azx_dev, SD_LPIB); + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + delay = pos - lpib_pos; + else + delay = lpib_pos - pos; + if (delay < 0) { + if (delay >= azx_dev->delay_negative_threshold) + delay = 0; + else + delay += azx_dev->bufsize; + } + if (delay >= azx_dev->period_bytes) { + dev_info(chip->card->dev, + "Unstable LPIB (%d >= %d); disabling LPIB delay counting\n", + delay, azx_dev->period_bytes); + delay = 0; + chip->driver_caps &= ~AZX_DCAPS_COUNT_LPIB_DELAY; + } + delay = bytes_to_frames(substream->runtime, delay); + } + + if (substream->runtime) { + if (hinfo->ops.get_delay) + delay += hinfo->ops.get_delay(hinfo, apcm->codec, + substream); + substream->runtime->delay = delay; + } + + trace_azx_get_position(chip, azx_dev, pos, delay); + return pos; +} +EXPORT_SYMBOL_GPL(azx_get_position); + +static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx *chip = apcm->chip; + struct azx_dev *azx_dev = get_azx_dev(substream); + return bytes_to_frames(substream->runtime, + azx_get_position(chip, azx_dev, false)); +} + +static int azx_get_wallclock_tstamp(struct snd_pcm_substream *substream, + struct timespec *ts) +{ + struct azx_dev *azx_dev = get_azx_dev(substream); + u64 nsec; + + nsec = timecounter_read(&azx_dev->azx_tc); + nsec = div_u64(nsec, 3); /* can be optimized */ + nsec = azx_adjust_codec_delay(substream, nsec); + + *ts = ns_to_timespec(nsec); + + return 0; +} + +static struct snd_pcm_hardware azx_pcm_hw = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID | + /* No full-resume yet implemented */ + /* SNDRV_PCM_INFO_RESUME |*/ + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_SYNC_START | + SNDRV_PCM_INFO_HAS_WALL_CLOCK | + SNDRV_PCM_INFO_NO_PERIOD_WAKEUP), + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_48000, + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = AZX_MAX_BUF_SIZE, + .period_bytes_min = 128, + .period_bytes_max = AZX_MAX_BUF_SIZE / 2, + .periods_min = 2, + .periods_max = AZX_MAX_FRAG, + .fifo_size = 0, +}; + +static int azx_pcm_open(struct snd_pcm_substream *substream) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct hda_pcm_stream *hinfo = apcm->hinfo[substream->stream]; + struct azx *chip = apcm->chip; + struct azx_dev *azx_dev; + struct snd_pcm_runtime *runtime = substream->runtime; + unsigned long flags; + int err; + int buff_step; + + mutex_lock(&chip->open_mutex); + azx_dev = azx_assign_device(chip, substream); + if (azx_dev == NULL) { + mutex_unlock(&chip->open_mutex); + return -EBUSY; + } + runtime->hw = azx_pcm_hw; + runtime->hw.channels_min = hinfo->channels_min; + runtime->hw.channels_max = hinfo->channels_max; + runtime->hw.formats = hinfo->formats; + runtime->hw.rates = hinfo->rates; + snd_pcm_limit_hw_rates(runtime); + snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + + /* avoid wrap-around with wall-clock */ + snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_TIME, + 20, + 178000000); + + if (chip->align_buffer_size) + /* constrain buffer sizes to be multiple of 128 + bytes. This is more efficient in terms of memory + access but isn't required by the HDA spec and + prevents users from specifying exact period/buffer + sizes. For example for 44.1kHz, a period size set + to 20ms will be rounded to 19.59ms. */ + buff_step = 128; + else + /* Don't enforce steps on buffer sizes, still need to + be multiple of 4 bytes (HDA spec). Tested on Intel + HDA controllers, may not work on all devices where + option needs to be disabled */ + buff_step = 4; + + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, + buff_step); + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, + buff_step); + snd_hda_power_up_d3wait(apcm->codec); + err = hinfo->ops.open(hinfo, apcm->codec, substream); + if (err < 0) { + azx_release_device(azx_dev); + snd_hda_power_down(apcm->codec); + mutex_unlock(&chip->open_mutex); + return err; + } + snd_pcm_limit_hw_rates(runtime); + /* sanity check */ + if (snd_BUG_ON(!runtime->hw.channels_min) || + snd_BUG_ON(!runtime->hw.channels_max) || + snd_BUG_ON(!runtime->hw.formats) || + snd_BUG_ON(!runtime->hw.rates)) { + azx_release_device(azx_dev); + hinfo->ops.close(hinfo, apcm->codec, substream); + snd_hda_power_down(apcm->codec); + mutex_unlock(&chip->open_mutex); + return -EINVAL; + } + + /* disable WALLCLOCK timestamps for capture streams + until we figure out how to handle digital inputs */ + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_WALL_CLOCK; + + spin_lock_irqsave(&chip->reg_lock, flags); + azx_dev->substream = substream; + azx_dev->running = 0; + spin_unlock_irqrestore(&chip->reg_lock, flags); + + runtime->private_data = azx_dev; + snd_pcm_set_sync(substream); + mutex_unlock(&chip->open_mutex); + return 0; +} + +static int azx_pcm_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *area) +{ + struct azx_pcm *apcm = snd_pcm_substream_chip(substream); + struct azx *chip = apcm->chip; + if (chip->ops->pcm_mmap_prepare) + chip->ops->pcm_mmap_prepare(substream, area); + return snd_pcm_lib_default_mmap(substream, area); +} + +static struct snd_pcm_ops azx_pcm_ops = { + .open = azx_pcm_open, + .close = azx_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = azx_pcm_hw_params, + .hw_free = azx_pcm_hw_free, + .prepare = azx_pcm_prepare, + .trigger = azx_pcm_trigger, + .pointer = azx_pcm_pointer, + .wall_clock = azx_get_wallclock_tstamp, + .mmap = azx_pcm_mmap, + .page = snd_pcm_sgbuf_ops_page, +}; + +static void azx_pcm_free(struct snd_pcm *pcm) +{ + struct azx_pcm *apcm = pcm->private_data; + if (apcm) { + list_del(&apcm->list); + kfree(apcm); + } +} + +#define MAX_PREALLOC_SIZE (32 * 1024 * 1024) + +static int azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec, + struct hda_pcm *cpcm) +{ + struct azx *chip = bus->private_data; + struct snd_pcm *pcm; + struct azx_pcm *apcm; + int pcm_dev = cpcm->device; + unsigned int size; + int s, err; + + list_for_each_entry(apcm, &chip->pcm_list, list) { + if (apcm->pcm->device == pcm_dev) { + dev_err(chip->card->dev, "PCM %d already exists\n", + pcm_dev); + return -EBUSY; + } + } + err = snd_pcm_new(chip->card, cpcm->name, pcm_dev, + cpcm->stream[SNDRV_PCM_STREAM_PLAYBACK].substreams, + cpcm->stream[SNDRV_PCM_STREAM_CAPTURE].substreams, + &pcm); + if (err < 0) + return err; + strlcpy(pcm->name, cpcm->name, sizeof(pcm->name)); + apcm = kzalloc(sizeof(*apcm), GFP_KERNEL); + if (apcm == NULL) + return -ENOMEM; + apcm->chip = chip; + apcm->pcm = pcm; + apcm->codec = codec; + pcm->private_data = apcm; + pcm->private_free = azx_pcm_free; + if (cpcm->pcm_type == HDA_PCM_TYPE_MODEM) + pcm->dev_class = SNDRV_PCM_CLASS_MODEM; + list_add_tail(&apcm->list, &chip->pcm_list); + cpcm->pcm = pcm; + for (s = 0; s < 2; s++) { + apcm->hinfo[s] = &cpcm->stream[s]; + if (cpcm->stream[s].substreams) + snd_pcm_set_ops(pcm, s, &azx_pcm_ops); + } + /* buffer pre-allocation */ + size = CONFIG_SND_HDA_PREALLOC_SIZE * 1024; + if (size > MAX_PREALLOC_SIZE) + size = MAX_PREALLOC_SIZE; + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, + chip->card->dev, + size, MAX_PREALLOC_SIZE); + /* link to codec */ + pcm->dev = &codec->dev; + return 0; +} + +/* + * CORB / RIRB interface + */ +static int azx_alloc_cmd_io(struct azx *chip) +{ + int err; + + /* single page (at least 4096 bytes) must suffice for both ringbuffes */ + err = chip->ops->dma_alloc_pages(chip, SNDRV_DMA_TYPE_DEV, + PAGE_SIZE, &chip->rb); + if (err < 0) + dev_err(chip->card->dev, "cannot allocate CORB/RIRB\n"); + return err; +} +EXPORT_SYMBOL_GPL(azx_alloc_cmd_io); + +static void azx_init_cmd_io(struct azx *chip) +{ + int timeout; + + spin_lock_irq(&chip->reg_lock); + /* CORB set up */ + chip->corb.addr = chip->rb.addr; + chip->corb.buf = (u32 *)chip->rb.area; + azx_writel(chip, CORBLBASE, (u32)chip->corb.addr); + azx_writel(chip, CORBUBASE, upper_32_bits(chip->corb.addr)); + + /* set the corb size to 256 entries (ULI requires explicitly) */ + azx_writeb(chip, CORBSIZE, 0x02); + /* set the corb write pointer to 0 */ + azx_writew(chip, CORBWP, 0); + + /* reset the corb hw read pointer */ + azx_writew(chip, CORBRP, ICH6_CORBRP_RST); + for (timeout = 1000; timeout > 0; timeout--) { + if ((azx_readw(chip, CORBRP) & ICH6_CORBRP_RST) == ICH6_CORBRP_RST) + break; + udelay(1); + } + if (timeout <= 0) + dev_err(chip->card->dev, "CORB reset timeout#1, CORBRP = %d\n", + azx_readw(chip, CORBRP)); + + azx_writew(chip, CORBRP, 0); + for (timeout = 1000; timeout > 0; timeout--) { + if (azx_readw(chip, CORBRP) == 0) + break; + udelay(1); + } + if (timeout <= 0) + dev_err(chip->card->dev, "CORB reset timeout#2, CORBRP = %d\n", + azx_readw(chip, CORBRP)); + + /* enable corb dma */ + azx_writeb(chip, CORBCTL, ICH6_CORBCTL_RUN); + + /* RIRB set up */ + chip->rirb.addr = chip->rb.addr + 2048; + chip->rirb.buf = (u32 *)(chip->rb.area + 2048); + chip->rirb.wp = chip->rirb.rp = 0; + memset(chip->rirb.cmds, 0, sizeof(chip->rirb.cmds)); + azx_writel(chip, RIRBLBASE, (u32)chip->rirb.addr); + azx_writel(chip, RIRBUBASE, upper_32_bits(chip->rirb.addr)); + + /* set the rirb size to 256 entries (ULI requires explicitly) */ + azx_writeb(chip, RIRBSIZE, 0x02); + /* reset the rirb hw write pointer */ + azx_writew(chip, RIRBWP, ICH6_RIRBWP_RST); + /* set N=1, get RIRB response interrupt for new entry */ + if (chip->driver_caps & AZX_DCAPS_CTX_WORKAROUND) + azx_writew(chip, RINTCNT, 0xc0); + else + azx_writew(chip, RINTCNT, 1); + /* enable rirb dma and response irq */ + azx_writeb(chip, RIRBCTL, ICH6_RBCTL_DMA_EN | ICH6_RBCTL_IRQ_EN); + spin_unlock_irq(&chip->reg_lock); +} +EXPORT_SYMBOL_GPL(azx_init_cmd_io); + +static void azx_free_cmd_io(struct azx *chip) +{ + spin_lock_irq(&chip->reg_lock); + /* disable ringbuffer DMAs */ + azx_writeb(chip, RIRBCTL, 0); + azx_writeb(chip, CORBCTL, 0); + spin_unlock_irq(&chip->reg_lock); +} +EXPORT_SYMBOL_GPL(azx_free_cmd_io); + +static unsigned int azx_command_addr(u32 cmd) +{ + unsigned int addr = cmd >> 28; + + if (addr >= AZX_MAX_CODECS) { + snd_BUG(); + addr = 0; + } + + return addr; +} + +/* send a command */ +static int azx_corb_send_cmd(struct hda_bus *bus, u32 val) +{ + struct azx *chip = bus->private_data; + unsigned int addr = azx_command_addr(val); + unsigned int wp, rp; + + spin_lock_irq(&chip->reg_lock); + + /* add command to corb */ + wp = azx_readw(chip, CORBWP); + if (wp == 0xffff) { + /* something wrong, controller likely turned to D3 */ + spin_unlock_irq(&chip->reg_lock); + return -EIO; + } + wp++; + wp %= ICH6_MAX_CORB_ENTRIES; + + rp = azx_readw(chip, CORBRP); + if (wp == rp) { + /* oops, it's full */ + spin_unlock_irq(&chip->reg_lock); + return -EAGAIN; + } + + chip->rirb.cmds[addr]++; + chip->corb.buf[wp] = cpu_to_le32(val); + azx_writew(chip, CORBWP, wp); + + spin_unlock_irq(&chip->reg_lock); + + return 0; +} + +#define ICH6_RIRB_EX_UNSOL_EV (1<<4) + +/* retrieve RIRB entry - called from interrupt handler */ +static void azx_update_rirb(struct azx *chip) +{ + unsigned int rp, wp; + unsigned int addr; + u32 res, res_ex; + + wp = azx_readw(chip, RIRBWP); + if (wp == 0xffff) { + /* something wrong, controller likely turned to D3 */ + return; + } + + if (wp == chip->rirb.wp) + return; + chip->rirb.wp = wp; + + while (chip->rirb.rp != wp) { + chip->rirb.rp++; + chip->rirb.rp %= ICH6_MAX_RIRB_ENTRIES; + + rp = chip->rirb.rp << 1; /* an RIRB entry is 8-bytes */ + res_ex = le32_to_cpu(chip->rirb.buf[rp + 1]); + res = le32_to_cpu(chip->rirb.buf[rp]); + addr = res_ex & 0xf; + if ((addr >= AZX_MAX_CODECS) || !(chip->codec_mask & (1 << addr))) { + dev_err(chip->card->dev, "spurious response %#x:%#x, rp = %d, wp = %d", + res, res_ex, + chip->rirb.rp, wp); + snd_BUG(); + } + else if (res_ex & ICH6_RIRB_EX_UNSOL_EV) + snd_hda_queue_unsol_event(chip->bus, res, res_ex); + else if (chip->rirb.cmds[addr]) { + chip->rirb.res[addr] = res; + smp_wmb(); + chip->rirb.cmds[addr]--; + } else if (printk_ratelimit()) { + dev_err(chip->card->dev, "spurious response %#x:%#x, last cmd=%#08x\n", + res, res_ex, + chip->last_cmd[addr]); + } + } +} + +/* receive a response */ +static unsigned int azx_rirb_get_response(struct hda_bus *bus, + unsigned int addr) +{ + struct azx *chip = bus->private_data; + unsigned long timeout; + unsigned long loopcounter; + int do_poll = 0; + + again: + timeout = jiffies + msecs_to_jiffies(1000); + + for (loopcounter = 0;; loopcounter++) { + if (chip->polling_mode || do_poll) { + spin_lock_irq(&chip->reg_lock); + azx_update_rirb(chip); + spin_unlock_irq(&chip->reg_lock); + } + if (!chip->rirb.cmds[addr]) { + smp_rmb(); + bus->rirb_error = 0; + + if (!do_poll) + chip->poll_count = 0; + return chip->rirb.res[addr]; /* the last value */ + } + if (time_after(jiffies, timeout)) + break; + if (bus->needs_damn_long_delay || loopcounter > 3000) + msleep(2); /* temporary workaround */ + else { + udelay(10); + cond_resched(); + } + } + + if (!bus->no_response_fallback) + return -1; + + if (!chip->polling_mode && chip->poll_count < 2) { + dev_dbg(chip->card->dev, + "azx_get_response timeout, polling the codec once: last cmd=0x%08x\n", + chip->last_cmd[addr]); + do_poll = 1; + chip->poll_count++; + goto again; + } + + + if (!chip->polling_mode) { + dev_warn(chip->card->dev, + "azx_get_response timeout, switching to polling mode: last cmd=0x%08x\n", + chip->last_cmd[addr]); + chip->polling_mode = 1; + goto again; + } + + if (chip->msi) { + dev_warn(chip->card->dev, + "No response from codec, disabling MSI: last cmd=0x%08x\n", + chip->last_cmd[addr]); + if (chip->ops->disable_msi_reset_irq(chip) && + chip->ops->disable_msi_reset_irq(chip) < 0) { + bus->rirb_error = 1; + return -1; + } + goto again; + } + + if (chip->probing) { + /* If this critical timeout happens during the codec probing + * phase, this is likely an access to a non-existing codec + * slot. Better to return an error and reset the system. + */ + return -1; + } + + /* a fatal communication error; need either to reset or to fallback + * to the single_cmd mode + */ + bus->rirb_error = 1; + if (bus->allow_bus_reset && !bus->response_reset && !bus->in_reset) { + bus->response_reset = 1; + return -1; /* give a chance to retry */ + } + + dev_err(chip->card->dev, + "azx_get_response timeout, switching to single_cmd mode: last cmd=0x%08x\n", + chip->last_cmd[addr]); + chip->single_cmd = 1; + bus->response_reset = 0; + /* release CORB/RIRB */ + azx_free_cmd_io(chip); + /* disable unsolicited responses */ + azx_writel(chip, GCTL, azx_readl(chip, GCTL) & ~ICH6_GCTL_UNSOL); + return -1; +} + +/* + * Use the single immediate command instead of CORB/RIRB for simplicity + * + * Note: according to Intel, this is not preferred use. The command was + * intended for the BIOS only, and may get confused with unsolicited + * responses. So, we shouldn't use it for normal operation from the + * driver. + * I left the codes, however, for debugging/testing purposes. + */ + +/* receive a response */ +static int azx_single_wait_for_response(struct azx *chip, unsigned int addr) +{ + int timeout = 50; + + while (timeout--) { + /* check IRV busy bit */ + if (azx_readw(chip, IRS) & ICH6_IRS_VALID) { + /* reuse rirb.res as the response return value */ + chip->rirb.res[addr] = azx_readl(chip, IR); + return 0; + } + udelay(1); + } + if (printk_ratelimit()) + dev_dbg(chip->card->dev, "get_response timeout: IRS=0x%x\n", + azx_readw(chip, IRS)); + chip->rirb.res[addr] = -1; + return -EIO; +} + +/* send a command */ +static int azx_single_send_cmd(struct hda_bus *bus, u32 val) +{ + struct azx *chip = bus->private_data; + unsigned int addr = azx_command_addr(val); + int timeout = 50; + + bus->rirb_error = 0; + while (timeout--) { + /* check ICB busy bit */ + if (!((azx_readw(chip, IRS) & ICH6_IRS_BUSY))) { + /* Clear IRV valid bit */ + azx_writew(chip, IRS, azx_readw(chip, IRS) | + ICH6_IRS_VALID); + azx_writel(chip, IC, val); + azx_writew(chip, IRS, azx_readw(chip, IRS) | + ICH6_IRS_BUSY); + return azx_single_wait_for_response(chip, addr); + } + udelay(1); + } + if (printk_ratelimit()) + dev_dbg(chip->card->dev, + "send_cmd timeout: IRS=0x%x, val=0x%x\n", + azx_readw(chip, IRS), val); + return -EIO; +} + +/* receive a response */ +static unsigned int azx_single_get_response(struct hda_bus *bus, + unsigned int addr) +{ + struct azx *chip = bus->private_data; + return chip->rirb.res[addr]; +} + +/* + * The below are the main callbacks from hda_codec. + * + * They are just the skeleton to call sub-callbacks according to the + * current setting of chip->single_cmd. + */ + +/* send a command */ +static int azx_send_cmd(struct hda_bus *bus, unsigned int val) +{ + struct azx *chip = bus->private_data; + + if (chip->disabled) + return 0; + chip->last_cmd[azx_command_addr(val)] = val; + if (chip->single_cmd) + return azx_single_send_cmd(bus, val); + else + return azx_corb_send_cmd(bus, val); +} +EXPORT_SYMBOL_GPL(azx_send_cmd); + +/* get a response */ +static unsigned int azx_get_response(struct hda_bus *bus, + unsigned int addr) +{ + struct azx *chip = bus->private_data; + if (chip->disabled) + return 0; + if (chip->single_cmd) + return azx_single_get_response(bus, addr); + else + return azx_rirb_get_response(bus, addr); +} +EXPORT_SYMBOL_GPL(azx_get_response); + +#ifdef CONFIG_SND_HDA_DSP_LOADER +/* + * DSP loading code (e.g. for CA0132) + */ + +/* use the first stream for loading DSP */ +static struct azx_dev * +azx_get_dsp_loader_dev(struct azx *chip) +{ + return &chip->azx_dev[chip->playback_index_offset]; +} + +static int azx_load_dsp_prepare(struct hda_bus *bus, unsigned int format, + unsigned int byte_size, + struct snd_dma_buffer *bufp) +{ + u32 *bdl; + struct azx *chip = bus->private_data; + struct azx_dev *azx_dev; + int err; + + azx_dev = azx_get_dsp_loader_dev(chip); + + dsp_lock(azx_dev); + spin_lock_irq(&chip->reg_lock); + if (azx_dev->running || azx_dev->locked) { + spin_unlock_irq(&chip->reg_lock); + err = -EBUSY; + goto unlock; + } + azx_dev->prepared = 0; + chip->saved_azx_dev = *azx_dev; + azx_dev->locked = 1; + spin_unlock_irq(&chip->reg_lock); + + err = chip->ops->dma_alloc_pages(chip, SNDRV_DMA_TYPE_DEV_SG, + byte_size, bufp); + if (err < 0) + goto err_alloc; + + azx_dev->bufsize = byte_size; + azx_dev->period_bytes = byte_size; + azx_dev->format_val = format; + + azx_stream_reset(chip, azx_dev); + + /* reset BDL address */ + azx_sd_writel(chip, azx_dev, SD_BDLPL, 0); + azx_sd_writel(chip, azx_dev, SD_BDLPU, 0); + + azx_dev->frags = 0; + bdl = (u32 *)azx_dev->bdl.area; + err = setup_bdle(chip, bufp, azx_dev, &bdl, 0, byte_size, 0); + if (err < 0) + goto error; + + azx_setup_controller(chip, azx_dev); + dsp_unlock(azx_dev); + return azx_dev->stream_tag; + + error: + chip->ops->dma_free_pages(chip, bufp); + err_alloc: + spin_lock_irq(&chip->reg_lock); + if (azx_dev->opened) + *azx_dev = chip->saved_azx_dev; + azx_dev->locked = 0; + spin_unlock_irq(&chip->reg_lock); + unlock: + dsp_unlock(azx_dev); + return err; +} + +static void azx_load_dsp_trigger(struct hda_bus *bus, bool start) +{ + struct azx *chip = bus->private_data; + struct azx_dev *azx_dev = azx_get_dsp_loader_dev(chip); + + if (start) + azx_stream_start(chip, azx_dev); + else + azx_stream_stop(chip, azx_dev); + azx_dev->running = start; +} + +static void azx_load_dsp_cleanup(struct hda_bus *bus, + struct snd_dma_buffer *dmab) +{ + struct azx *chip = bus->private_data; + struct azx_dev *azx_dev = azx_get_dsp_loader_dev(chip); + + if (!dmab->area || !azx_dev->locked) + return; + + dsp_lock(azx_dev); + /* reset BDL address */ + azx_sd_writel(chip, azx_dev, SD_BDLPL, 0); + azx_sd_writel(chip, azx_dev, SD_BDLPU, 0); + azx_sd_writel(chip, azx_dev, SD_CTL, 0); + azx_dev->bufsize = 0; + azx_dev->period_bytes = 0; + azx_dev->format_val = 0; + + chip->ops->dma_free_pages(chip, dmab); + dmab->area = NULL; + + spin_lock_irq(&chip->reg_lock); + if (azx_dev->opened) + *azx_dev = chip->saved_azx_dev; + azx_dev->locked = 0; + spin_unlock_irq(&chip->reg_lock); + dsp_unlock(azx_dev); +} +#endif /* CONFIG_SND_HDA_DSP_LOADER */ + +int azx_alloc_stream_pages(struct azx *chip) +{ + int i, err; + struct snd_card *card = chip->card; + + for (i = 0; i < chip->num_streams; i++) { + dsp_lock_init(&chip->azx_dev[i]); + /* allocate memory for the BDL for each stream */ + err = chip->ops->dma_alloc_pages(chip, SNDRV_DMA_TYPE_DEV, + BDL_SIZE, + &chip->azx_dev[i].bdl); + if (err < 0) { + dev_err(card->dev, "cannot allocate BDL\n"); + return -ENOMEM; + } + } + /* allocate memory for the position buffer */ + err = chip->ops->dma_alloc_pages(chip, SNDRV_DMA_TYPE_DEV, + chip->num_streams * 8, &chip->posbuf); + if (err < 0) { + dev_err(card->dev, "cannot allocate posbuf\n"); + return -ENOMEM; + } + + /* allocate CORB/RIRB */ + err = azx_alloc_cmd_io(chip); + if (err < 0) + return err; + return 0; +} +EXPORT_SYMBOL_GPL(azx_alloc_stream_pages); + +void azx_free_stream_pages(struct azx *chip) +{ + int i; + if (chip->azx_dev) { + for (i = 0; i < chip->num_streams; i++) + if (chip->azx_dev[i].bdl.area) + chip->ops->dma_free_pages( + chip, &chip->azx_dev[i].bdl); + } + if (chip->rb.area) + chip->ops->dma_free_pages(chip, &chip->rb); + if (chip->posbuf.area) + chip->ops->dma_free_pages(chip, &chip->posbuf); +} +EXPORT_SYMBOL_GPL(azx_free_stream_pages); + +/* + * Lowlevel interface + */ + +/* enter link reset */ +void azx_enter_link_reset(struct azx *chip) +{ + unsigned long timeout; + + /* reset controller */ + azx_writel(chip, GCTL, azx_readl(chip, GCTL) & ~ICH6_GCTL_RESET); + + timeout = jiffies + msecs_to_jiffies(100); + while ((azx_readb(chip, GCTL) & ICH6_GCTL_RESET) && + time_before(jiffies, timeout)) + usleep_range(500, 1000); +} +EXPORT_SYMBOL_GPL(azx_enter_link_reset); + +/* exit link reset */ +static void azx_exit_link_reset(struct azx *chip) +{ + unsigned long timeout; + + azx_writeb(chip, GCTL, azx_readb(chip, GCTL) | ICH6_GCTL_RESET); + + timeout = jiffies + msecs_to_jiffies(100); + while (!azx_readb(chip, GCTL) && + time_before(jiffies, timeout)) + usleep_range(500, 1000); +} + +/* reset codec link */ +static int azx_reset(struct azx *chip, int full_reset) +{ + if (!full_reset) + goto __skip; + + /* clear STATESTS */ + azx_writew(chip, STATESTS, STATESTS_INT_MASK); + + /* reset controller */ + azx_enter_link_reset(chip); + + /* delay for >= 100us for codec PLL to settle per spec + * Rev 0.9 section 5.5.1 + */ + usleep_range(500, 1000); + + /* Bring controller out of reset */ + azx_exit_link_reset(chip); + + /* Brent Chartrand said to wait >= 540us for codecs to initialize */ + usleep_range(1000, 1200); + + __skip: + /* check to see if controller is ready */ + if (!azx_readb(chip, GCTL)) { + dev_dbg(chip->card->dev, "azx_reset: controller not ready!\n"); + return -EBUSY; + } + + /* Accept unsolicited responses */ + if (!chip->single_cmd) + azx_writel(chip, GCTL, azx_readl(chip, GCTL) | + ICH6_GCTL_UNSOL); + + /* detect codecs */ + if (!chip->codec_mask) { + chip->codec_mask = azx_readw(chip, STATESTS); + dev_dbg(chip->card->dev, "codec_mask = 0x%x\n", + chip->codec_mask); + } + + return 0; +} + +/* enable interrupts */ +static void azx_int_enable(struct azx *chip) +{ + /* enable controller CIE and GIE */ + azx_writel(chip, INTCTL, azx_readl(chip, INTCTL) | + ICH6_INT_CTRL_EN | ICH6_INT_GLOBAL_EN); +} + +/* disable interrupts */ +static void azx_int_disable(struct azx *chip) +{ + int i; + + /* disable interrupts in stream descriptor */ + for (i = 0; i < chip->num_streams; i++) { + struct azx_dev *azx_dev = &chip->azx_dev[i]; + azx_sd_writeb(chip, azx_dev, SD_CTL, + azx_sd_readb(chip, azx_dev, SD_CTL) & + ~SD_INT_MASK); + } + + /* disable SIE for all streams */ + azx_writeb(chip, INTCTL, 0); + + /* disable controller CIE and GIE */ + azx_writel(chip, INTCTL, azx_readl(chip, INTCTL) & + ~(ICH6_INT_CTRL_EN | ICH6_INT_GLOBAL_EN)); +} + +/* clear interrupts */ +static void azx_int_clear(struct azx *chip) +{ + int i; + + /* clear stream status */ + for (i = 0; i < chip->num_streams; i++) { + struct azx_dev *azx_dev = &chip->azx_dev[i]; + azx_sd_writeb(chip, azx_dev, SD_STS, SD_INT_MASK); + } + + /* clear STATESTS */ + azx_writew(chip, STATESTS, STATESTS_INT_MASK); + + /* clear rirb status */ + azx_writeb(chip, RIRBSTS, RIRB_INT_MASK); + + /* clear int status */ + azx_writel(chip, INTSTS, ICH6_INT_CTRL_EN | ICH6_INT_ALL_STREAM); +} + +/* + * reset and start the controller registers + */ +void azx_init_chip(struct azx *chip, int full_reset) +{ + if (chip->initialized) + return; + + /* reset controller */ + azx_reset(chip, full_reset); + + /* initialize interrupts */ + azx_int_clear(chip); + azx_int_enable(chip); + + /* initialize the codec command I/O */ + if (!chip->single_cmd) + azx_init_cmd_io(chip); + + /* program the position buffer */ + azx_writel(chip, DPLBASE, (u32)chip->posbuf.addr); + azx_writel(chip, DPUBASE, upper_32_bits(chip->posbuf.addr)); + + chip->initialized = 1; +} +EXPORT_SYMBOL_GPL(azx_init_chip); + +void azx_stop_chip(struct azx *chip) +{ + if (!chip->initialized) + return; + + /* disable interrupts */ + azx_int_disable(chip); + azx_int_clear(chip); + + /* disable CORB/RIRB */ + azx_free_cmd_io(chip); + + /* disable position buffer */ + azx_writel(chip, DPLBASE, 0); + azx_writel(chip, DPUBASE, 0); + + chip->initialized = 0; +} +EXPORT_SYMBOL_GPL(azx_stop_chip); + +/* + * interrupt handler + */ +irqreturn_t azx_interrupt(int irq, void *dev_id) +{ + struct azx *chip = dev_id; + struct azx_dev *azx_dev; + u32 status; + u8 sd_status; + int i; + +#ifdef CONFIG_PM_RUNTIME + if (chip->driver_caps & AZX_DCAPS_PM_RUNTIME) + if (chip->card->dev->power.runtime_status != RPM_ACTIVE) + return IRQ_NONE; +#endif + + spin_lock(&chip->reg_lock); + + if (chip->disabled) { + spin_unlock(&chip->reg_lock); + return IRQ_NONE; + } + + status = azx_readl(chip, INTSTS); + if (status == 0 || status == 0xffffffff) { + spin_unlock(&chip->reg_lock); + return IRQ_NONE; + } + + for (i = 0; i < chip->num_streams; i++) { + azx_dev = &chip->azx_dev[i]; + if (status & azx_dev->sd_int_sta_mask) { + sd_status = azx_sd_readb(chip, azx_dev, SD_STS); + azx_sd_writeb(chip, azx_dev, SD_STS, SD_INT_MASK); + if (!azx_dev->substream || !azx_dev->running || + !(sd_status & SD_INT_COMPLETE)) + continue; + /* check whether this IRQ is really acceptable */ + if (!chip->ops->position_check || + chip->ops->position_check(chip, azx_dev)) { + spin_unlock(&chip->reg_lock); + snd_pcm_period_elapsed(azx_dev->substream); + spin_lock(&chip->reg_lock); + } + } + } + + /* clear rirb int */ + status = azx_readb(chip, RIRBSTS); + if (status & RIRB_INT_MASK) { + if (status & RIRB_INT_RESPONSE) { + if (chip->driver_caps & AZX_DCAPS_RIRB_PRE_DELAY) + udelay(80); + azx_update_rirb(chip); + } + azx_writeb(chip, RIRBSTS, RIRB_INT_MASK); + } + + spin_unlock(&chip->reg_lock); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL_GPL(azx_interrupt); + +/* + * Codec initerface + */ + +/* + * Probe the given codec address + */ +static int probe_codec(struct azx *chip, int addr) +{ + unsigned int cmd = (addr << 28) | (AC_NODE_ROOT << 20) | + (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID; + unsigned int res; + + mutex_lock(&chip->bus->cmd_mutex); + chip->probing = 1; + azx_send_cmd(chip->bus, cmd); + res = azx_get_response(chip->bus, addr); + chip->probing = 0; + mutex_unlock(&chip->bus->cmd_mutex); + if (res == -1) + return -EIO; + dev_dbg(chip->card->dev, "codec #%d probed OK\n", addr); + return 0; +} + +static void azx_bus_reset(struct hda_bus *bus) +{ + struct azx *chip = bus->private_data; + + bus->in_reset = 1; + azx_stop_chip(chip); + azx_init_chip(chip, 1); +#ifdef CONFIG_PM + if (chip->initialized) { + struct azx_pcm *p; + list_for_each_entry(p, &chip->pcm_list, list) + snd_pcm_suspend_all(p->pcm); + snd_hda_suspend(chip->bus); + snd_hda_resume(chip->bus); + } +#endif + bus->in_reset = 0; +} + +#ifdef CONFIG_PM +/* power-up/down the controller */ +static void azx_power_notify(struct hda_bus *bus, bool power_up) +{ + struct azx *chip = bus->private_data; + + if (!(chip->driver_caps & AZX_DCAPS_PM_RUNTIME)) + return; + + if (power_up) + pm_runtime_get_sync(chip->card->dev); + else + pm_runtime_put_sync(chip->card->dev); +} +#endif + +static int get_jackpoll_interval(struct azx *chip) +{ + int i; + unsigned int j; + + if (!chip->jackpoll_ms) + return 0; + + i = chip->jackpoll_ms[chip->dev_index]; + if (i == 0) + return 0; + if (i < 50 || i > 60000) + j = 0; + else + j = msecs_to_jiffies(i); + if (j == 0) + dev_warn(chip->card->dev, + "jackpoll_ms value out of range: %d\n", i); + return j; +} + +/* Codec initialization */ +int azx_codec_create(struct azx *chip, const char *model, + unsigned int max_slots, + int *power_save_to) +{ + struct hda_bus_template bus_temp; + int c, codecs, err; + + memset(&bus_temp, 0, sizeof(bus_temp)); + bus_temp.private_data = chip; + bus_temp.modelname = model; + bus_temp.pci = chip->pci; + bus_temp.ops.command = azx_send_cmd; + bus_temp.ops.get_response = azx_get_response; + bus_temp.ops.attach_pcm = azx_attach_pcm_stream; + bus_temp.ops.bus_reset = azx_bus_reset; +#ifdef CONFIG_PM + bus_temp.power_save = power_save_to; + bus_temp.ops.pm_notify = azx_power_notify; +#endif +#ifdef CONFIG_SND_HDA_DSP_LOADER + bus_temp.ops.load_dsp_prepare = azx_load_dsp_prepare; + bus_temp.ops.load_dsp_trigger = azx_load_dsp_trigger; + bus_temp.ops.load_dsp_cleanup = azx_load_dsp_cleanup; +#endif + + err = snd_hda_bus_new(chip->card, &bus_temp, &chip->bus); + if (err < 0) + return err; + + if (chip->driver_caps & AZX_DCAPS_RIRB_DELAY) { + dev_dbg(chip->card->dev, "Enable delay in RIRB handling\n"); + chip->bus->needs_damn_long_delay = 1; + } + + codecs = 0; + if (!max_slots) + max_slots = AZX_DEFAULT_CODECS; + + /* First try to probe all given codec slots */ + for (c = 0; c < max_slots; c++) { + if ((chip->codec_mask & (1 << c)) & chip->codec_probe_mask) { + if (probe_codec(chip, c) < 0) { + /* Some BIOSen give you wrong codec addresses + * that don't exist + */ + dev_warn(chip->card->dev, + "Codec #%d probe error; disabling it...\n", c); + chip->codec_mask &= ~(1 << c); + /* More badly, accessing to a non-existing + * codec often screws up the controller chip, + * and disturbs the further communications. + * Thus if an error occurs during probing, + * better to reset the controller chip to + * get back to the sanity state. + */ + azx_stop_chip(chip); + azx_init_chip(chip, 1); + } + } + } + + /* AMD chipsets often cause the communication stalls upon certain + * sequence like the pin-detection. It seems that forcing the synced + * access works around the stall. Grrr... + */ + if (chip->driver_caps & AZX_DCAPS_SYNC_WRITE) { + dev_dbg(chip->card->dev, "Enable sync_write for stable communication\n"); + chip->bus->sync_write = 1; + chip->bus->allow_bus_reset = 1; + } + + /* Then create codec instances */ + for (c = 0; c < max_slots; c++) { + if ((chip->codec_mask & (1 << c)) & chip->codec_probe_mask) { + struct hda_codec *codec; + err = snd_hda_codec_new(chip->bus, c, &codec); + if (err < 0) + continue; + codec->jackpoll_interval = get_jackpoll_interval(chip); + codec->beep_mode = chip->beep_mode; + codecs++; + } + } + if (!codecs) { + dev_err(chip->card->dev, "no codecs initialized\n"); + return -ENXIO; + } + return 0; +} +EXPORT_SYMBOL_GPL(azx_codec_create); + +/* configure each codec instance */ +int azx_codec_configure(struct azx *chip) +{ + struct hda_codec *codec; + list_for_each_entry(codec, &chip->bus->codec_list, list) { + snd_hda_codec_configure(codec); + } + return 0; +} +EXPORT_SYMBOL_GPL(azx_codec_configure); + +/* mixer creation - all stuff is implemented in hda module */ +int azx_mixer_create(struct azx *chip) +{ + return snd_hda_build_controls(chip->bus); +} +EXPORT_SYMBOL_GPL(azx_mixer_create); + + +/* initialize SD streams */ +int azx_init_stream(struct azx *chip) +{ + int i; + + /* initialize each stream (aka device) + * assign the starting bdl address to each stream (device) + * and initialize + */ + for (i = 0; i < chip->num_streams; i++) { + struct azx_dev *azx_dev = &chip->azx_dev[i]; + azx_dev->posbuf = (u32 __iomem *)(chip->posbuf.area + i * 8); + /* offset: SDI0=0x80, SDI1=0xa0, ... SDO3=0x160 */ + azx_dev->sd_addr = chip->remap_addr + (0x20 * i + 0x80); + /* int mask: SDI0=0x01, SDI1=0x02, ... SDO3=0x80 */ + azx_dev->sd_int_sta_mask = 1 << i; + /* stream tag: must be non-zero and unique */ + azx_dev->index = i; + azx_dev->stream_tag = i + 1; + } + + return 0; +} +EXPORT_SYMBOL_GPL(azx_init_stream); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Common HDA driver funcitons"); |