linux_dsm_epyc7002/sound/soc/sh/rcar/ssi.c
Kuninori Morimoto d8d9b9730c
ASoC: rsnd: PIO related function cleanup
SSI had shared counting pointer position method between PIO/DMA mode
before. But now DMA mode is using DMAEngine feature to get it.
Thus, this counting pointer position method is needed for only PIO mode.
We don't need to share code anymore.
This patch names PIO related functions as rsnd_ssi_pio_xxx(), and
merged/cleanuped each feature.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-12-11 12:05:03 +00:00

1169 lines
25 KiB
C

/*
* Renesas R-Car SSIU/SSI support
*
* Copyright (C) 2013 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* Based on fsi.c
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <sound/simple_card_utils.h>
#include <linux/delay.h>
#include "rsnd.h"
#define RSND_SSI_NAME_SIZE 16
/*
* SSICR
*/
#define FORCE (1 << 31) /* Fixed */
#define DMEN (1 << 28) /* DMA Enable */
#define UIEN (1 << 27) /* Underflow Interrupt Enable */
#define OIEN (1 << 26) /* Overflow Interrupt Enable */
#define IIEN (1 << 25) /* Idle Mode Interrupt Enable */
#define DIEN (1 << 24) /* Data Interrupt Enable */
#define CHNL_4 (1 << 22) /* Channels */
#define CHNL_6 (2 << 22) /* Channels */
#define CHNL_8 (3 << 22) /* Channels */
#define DWL_8 (0 << 19) /* Data Word Length */
#define DWL_16 (1 << 19) /* Data Word Length */
#define DWL_18 (2 << 19) /* Data Word Length */
#define DWL_20 (3 << 19) /* Data Word Length */
#define DWL_22 (4 << 19) /* Data Word Length */
#define DWL_24 (5 << 19) /* Data Word Length */
#define DWL_32 (6 << 19) /* Data Word Length */
#define SWL_32 (3 << 16) /* R/W System Word Length */
#define SCKD (1 << 15) /* Serial Bit Clock Direction */
#define SWSD (1 << 14) /* Serial WS Direction */
#define SCKP (1 << 13) /* Serial Bit Clock Polarity */
#define SWSP (1 << 12) /* Serial WS Polarity */
#define SDTA (1 << 10) /* Serial Data Alignment */
#define PDTA (1 << 9) /* Parallel Data Alignment */
#define DEL (1 << 8) /* Serial Data Delay */
#define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
#define TRMD (1 << 1) /* Transmit/Receive Mode Select */
#define EN (1 << 0) /* SSI Module Enable */
/*
* SSISR
*/
#define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
#define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
#define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
#define DIRQ (1 << 24) /* Data Interrupt Status Flag */
/*
* SSIWSR
*/
#define CONT (1 << 8) /* WS Continue Function */
#define WS_MODE (1 << 0) /* WS Mode */
#define SSI_NAME "ssi"
struct rsnd_ssi {
struct rsnd_mod mod;
struct rsnd_mod *dma;
u32 flags;
u32 cr_own;
u32 cr_clk;
u32 cr_mode;
u32 cr_en;
u32 wsr;
int chan;
int rate;
int irq;
unsigned int usrcnt;
/* for PIO */
int byte_pos;
int byte_per_period;
int next_period_byte;
};
/* flags */
#define RSND_SSI_CLK_PIN_SHARE (1 << 0)
#define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */
#define RSND_SSI_HDMI0 (1 << 2) /* for HDMI0 */
#define RSND_SSI_HDMI1 (1 << 3) /* for HDMI1 */
#define RSND_SSI_PROBED (1 << 4)
#define for_each_rsnd_ssi(pos, priv, i) \
for (i = 0; \
(i < rsnd_ssi_nr(priv)) && \
((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
i++)
#define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id)
#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
#define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io))
#define rsnd_ssi_is_multi_slave(mod, io) \
(rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod)))
#define rsnd_ssi_is_run_mods(mod, io) \
(rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod)))
#define rsnd_ssi_can_output_clk(mod) (!__rsnd_ssi_is_pin_sharing(mod))
int rsnd_ssi_hdmi_port(struct rsnd_dai_stream *io)
{
struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
if (rsnd_flags_has(ssi, RSND_SSI_HDMI0))
return RSND_SSI_HDMI_PORT0;
if (rsnd_flags_has(ssi, RSND_SSI_HDMI1))
return RSND_SSI_HDMI_PORT1;
return 0;
}
int rsnd_ssi_use_busif(struct rsnd_dai_stream *io)
{
struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int use_busif = 0;
if (!rsnd_ssi_is_dma_mode(mod))
return 0;
if (!(rsnd_flags_has(ssi, RSND_SSI_NO_BUSIF)))
use_busif = 1;
if (rsnd_io_to_mod_src(io))
use_busif = 1;
return use_busif;
}
static void rsnd_ssi_status_clear(struct rsnd_mod *mod)
{
rsnd_mod_write(mod, SSISR, 0);
}
static u32 rsnd_ssi_status_get(struct rsnd_mod *mod)
{
return rsnd_mod_read(mod, SSISR);
}
static void rsnd_ssi_status_check(struct rsnd_mod *mod,
u32 bit)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
u32 status;
int i;
for (i = 0; i < 1024; i++) {
status = rsnd_ssi_status_get(mod);
if (status & bit)
return;
udelay(50);
}
dev_warn(dev, "%s[%d] status check failed\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
}
static u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io)
{
struct rsnd_mod *mod;
enum rsnd_mod_type types[] = {
RSND_MOD_SSIM1,
RSND_MOD_SSIM2,
RSND_MOD_SSIM3,
};
int i, mask;
mask = 0;
for (i = 0; i < ARRAY_SIZE(types); i++) {
mod = rsnd_io_to_mod(io, types[i]);
if (!mod)
continue;
mask |= 1 << rsnd_mod_id(mod);
}
return mask;
}
static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
{
struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
u32 mods;
mods = rsnd_ssi_multi_slaves_runtime(io) |
1 << rsnd_mod_id(ssi_mod);
if (ssi_parent_mod)
mods |= 1 << rsnd_mod_id(ssi_parent_mod);
return mods;
}
u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
{
if (rsnd_runtime_is_ssi_multi(io))
return rsnd_ssi_multi_slaves(io);
return 0;
}
unsigned int rsnd_ssi_clk_query(struct rsnd_priv *priv,
int param1, int param2, int *idx)
{
int ssi_clk_mul_table[] = {
1, 2, 4, 8, 16, 6, 12,
};
int j, ret;
unsigned int main_rate;
for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
/*
* It will set SSIWSR.CONT here, but SSICR.CKDV = 000
* with it is not allowed. (SSIWSR.WS_MODE with
* SSICR.CKDV = 000 is not allowed either).
* Skip it. See SSICR.CKDV
*/
if (j == 0)
continue;
/*
* this driver is assuming that
* system word is 32bit x chan
* see rsnd_ssi_init()
*/
main_rate = 32 * param1 * param2 * ssi_clk_mul_table[j];
ret = rsnd_adg_clk_query(priv, main_rate);
if (ret < 0)
continue;
if (idx)
*idx = j;
return main_rate;
}
return 0;
}
static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int chan = rsnd_runtime_channel_for_ssi(io);
int idx, ret;
unsigned int main_rate;
unsigned int rate = rsnd_io_is_play(io) ?
rsnd_src_get_out_rate(priv, io) :
rsnd_src_get_in_rate(priv, io);
if (!rsnd_rdai_is_clk_master(rdai))
return 0;
if (!rsnd_ssi_can_output_clk(mod))
return 0;
if (rsnd_ssi_is_multi_slave(mod, io))
return 0;
if (ssi->usrcnt > 1) {
if (ssi->rate != rate) {
dev_err(dev, "SSI parent/child should use same rate\n");
return -EINVAL;
}
return 0;
}
main_rate = rsnd_ssi_clk_query(priv, rate, chan, &idx);
if (!main_rate) {
dev_err(dev, "unsupported clock rate\n");
return -EIO;
}
ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
if (ret < 0)
return ret;
/*
* SSI clock will be output contiguously
* by below settings.
* This means, rsnd_ssi_master_clk_start()
* and rsnd_ssi_register_setup() are necessary
* for SSI parent
*
* SSICR : FORCE, SCKD, SWSD
* SSIWSR : CONT
*/
ssi->cr_clk = FORCE | SWL_32 | SCKD | SWSD | CKDV(idx);
ssi->wsr = CONT;
ssi->rate = rate;
dev_dbg(dev, "%s[%d] outputs %u Hz\n",
rsnd_mod_name(mod),
rsnd_mod_id(mod), rate);
return 0;
}
static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
if (!rsnd_rdai_is_clk_master(rdai))
return;
if (!rsnd_ssi_can_output_clk(mod))
return;
if (ssi->usrcnt > 1)
return;
ssi->cr_clk = 0;
ssi->rate = 0;
rsnd_adg_ssi_clk_stop(mod);
}
static void rsnd_ssi_config_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
u32 cr_own;
u32 cr_mode;
u32 wsr;
int is_tdm;
if (rsnd_ssi_is_parent(mod, io))
return;
is_tdm = rsnd_runtime_is_ssi_tdm(io);
/*
* always use 32bit system word.
* see also rsnd_ssi_master_clk_enable()
*/
cr_own = FORCE | SWL_32;
if (rdai->bit_clk_inv)
cr_own |= SCKP;
if (rdai->frm_clk_inv ^ is_tdm)
cr_own |= SWSP;
if (rdai->data_alignment)
cr_own |= SDTA;
if (rdai->sys_delay)
cr_own |= DEL;
if (rsnd_io_is_play(io))
cr_own |= TRMD;
switch (snd_pcm_format_width(runtime->format)) {
case 16:
cr_own |= DWL_16;
break;
case 24:
cr_own |= DWL_24;
break;
}
if (rsnd_ssi_is_dma_mode(mod)) {
cr_mode = UIEN | OIEN | /* over/under run */
DMEN; /* DMA : enable DMA */
} else {
cr_mode = DIEN; /* PIO : enable Data interrupt */
}
/*
* TDM Extend Mode
* see
* rsnd_ssiu_init_gen2()
*/
wsr = ssi->wsr;
if (is_tdm) {
wsr |= WS_MODE;
cr_own |= CHNL_8;
}
ssi->cr_own = cr_own;
ssi->cr_mode = cr_mode;
ssi->wsr = wsr;
}
static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
rsnd_mod_write(mod, SSIWSR, ssi->wsr);
rsnd_mod_write(mod, SSICR, ssi->cr_own |
ssi->cr_clk |
ssi->cr_mode |
ssi->cr_en);
}
/*
* SSI mod common functions
*/
static int rsnd_ssi_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int ret;
if (!rsnd_ssi_is_run_mods(mod, io))
return 0;
ssi->usrcnt++;
rsnd_mod_power_on(mod);
ret = rsnd_ssi_master_clk_start(mod, io);
if (ret < 0)
return ret;
rsnd_ssi_config_init(mod, io);
rsnd_ssi_register_setup(mod);
/* clear error status */
rsnd_ssi_status_clear(mod);
return 0;
}
static int rsnd_ssi_quit(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct device *dev = rsnd_priv_to_dev(priv);
if (!rsnd_ssi_is_run_mods(mod, io))
return 0;
if (!ssi->usrcnt) {
dev_err(dev, "%s[%d] usrcnt error\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return -EIO;
}
if (!rsnd_ssi_is_parent(mod, io))
ssi->cr_own = 0;
rsnd_ssi_master_clk_stop(mod, io);
rsnd_mod_power_off(mod);
ssi->usrcnt--;
return 0;
}
static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int chan = params_channels(params);
/*
* snd_pcm_ops::hw_params will be called *before*
* snd_soc_dai_ops::trigger. Thus, ssi->usrcnt is 0
* in 1st call.
*/
if (ssi->usrcnt) {
/*
* Already working.
* It will happen if SSI has parent/child connection.
* it is error if child <-> parent SSI uses
* different channels.
*/
if (ssi->chan != chan)
return -EIO;
}
ssi->chan = chan;
return 0;
}
static int rsnd_ssi_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
if (!rsnd_ssi_is_run_mods(mod, io))
return 0;
/*
* EN will be set via SSIU :: SSI_CONTROL
* if Multi channel mode
*/
if (rsnd_ssi_multi_slaves_runtime(io))
return 0;
/*
* EN is for data output.
* SSI parent EN is not needed.
*/
if (rsnd_ssi_is_parent(mod, io))
return 0;
ssi->cr_en = EN;
rsnd_mod_write(mod, SSICR, ssi->cr_own |
ssi->cr_clk |
ssi->cr_mode |
ssi->cr_en);
return 0;
}
static int rsnd_ssi_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
u32 cr;
if (!rsnd_ssi_is_run_mods(mod, io))
return 0;
if (rsnd_ssi_is_parent(mod, io))
return 0;
cr = ssi->cr_own |
ssi->cr_clk;
/*
* disable all IRQ,
* Playback: Wait all data was sent
* Capture: It might not receave data. Do nothing
*/
if (rsnd_io_is_play(io)) {
rsnd_mod_write(mod, SSICR, cr | EN);
rsnd_ssi_status_check(mod, DIRQ);
}
/*
* disable SSI,
* and, wait idle state
*/
rsnd_mod_write(mod, SSICR, cr); /* disabled all */
rsnd_ssi_status_check(mod, IIRQ);
ssi->cr_en = 0;
return 0;
}
static int rsnd_ssi_irq(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv,
int enable)
{
u32 val = 0;
if (rsnd_is_gen1(priv))
return 0;
if (rsnd_ssi_is_parent(mod, io))
return 0;
if (!rsnd_ssi_is_run_mods(mod, io))
return 0;
if (enable)
val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
rsnd_mod_write(mod, SSI_INT_ENABLE, val);
return 0;
}
static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
struct rsnd_dai_stream *io);
static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
int is_dma = rsnd_ssi_is_dma_mode(mod);
u32 status;
bool elapsed = false;
bool stop = false;
spin_lock(&priv->lock);
/* ignore all cases if not working */
if (!rsnd_io_is_working(io))
goto rsnd_ssi_interrupt_out;
status = rsnd_ssi_status_get(mod);
/* PIO only */
if (!is_dma && (status & DIRQ))
elapsed = rsnd_ssi_pio_interrupt(mod, io);
/* DMA only */
if (is_dma && (status & (UIRQ | OIRQ)))
stop = true;
rsnd_ssi_status_clear(mod);
rsnd_ssi_interrupt_out:
spin_unlock(&priv->lock);
if (elapsed)
rsnd_dai_period_elapsed(io);
if (stop)
snd_pcm_stop_xrun(io->substream);
}
static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
{
struct rsnd_mod *mod = data;
rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
return IRQ_HANDLED;
}
/*
* SSI PIO
*/
static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
if (!__rsnd_ssi_is_pin_sharing(mod))
return;
if (!rsnd_rdai_is_clk_master(rdai))
return;
switch (rsnd_mod_id(mod)) {
case 1:
case 2:
rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
break;
case 4:
rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
break;
case 8:
rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
break;
}
}
static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct snd_soc_pcm_runtime *rtd)
{
/*
* rsnd_rdai_is_clk_master() will be enabled after set_fmt,
* and, pcm_new will be called after it.
* This function reuse pcm_new at this point.
*/
rsnd_ssi_parent_attach(mod, io);
return 0;
}
static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int ret;
/*
* SSIP/SSIU/IRQ are not needed on
* SSI Multi slaves
*/
if (rsnd_ssi_is_multi_slave(mod, io))
return 0;
/*
* It can't judge ssi parent at this point
* see rsnd_ssi_pcm_new()
*/
ret = rsnd_ssiu_attach(io, mod);
if (ret < 0)
return ret;
/*
* SSI might be called again as PIO fallback
* It is easy to manual handling for IRQ request/free
*
* OTOH, this function might be called many times if platform is
* using MIX. It needs xxx_attach() many times on xxx_probe().
* Because of it, we can't control .probe/.remove calling count by
* mod->status.
* But it don't need to call request_irq() many times.
* Let's control it by RSND_SSI_PROBED flag.
*/
if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
ret = request_irq(ssi->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
dev_name(dev), mod);
rsnd_flags_set(ssi, RSND_SSI_PROBED);
}
return ret;
}
static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
/* Do nothing if non SSI (= SSI parent, multi SSI) mod */
if (pure_ssi_mod != mod)
return 0;
/* PIO will request IRQ again */
if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
free_irq(ssi->irq, mod);
rsnd_flags_del(ssi, RSND_SSI_PROBED);
}
return 0;
}
/*
* SSI PIO functions
*/
static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
int shift = 0;
int byte_pos;
bool elapsed = false;
if (snd_pcm_format_width(runtime->format) == 24)
shift = 8;
/*
* 8/16/32 data can be assesse to TDR/RDR register
* directly as 32bit data
* see rsnd_ssi_init()
*/
if (rsnd_io_is_play(io))
rsnd_mod_write(mod, SSITDR, (*buf) << shift);
else
*buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
byte_pos = ssi->byte_pos + sizeof(*buf);
if (byte_pos >= ssi->next_period_byte) {
int period_pos = byte_pos / ssi->byte_per_period;
if (period_pos >= runtime->periods) {
byte_pos = 0;
period_pos = 0;
}
ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
elapsed = true;
}
WRITE_ONCE(ssi->byte_pos, byte_pos);
return elapsed;
}
static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
if (!rsnd_ssi_is_parent(mod, io)) {
ssi->byte_pos = 0;
ssi->byte_per_period = runtime->period_size *
runtime->channels *
samples_to_bytes(runtime, 1);
ssi->next_period_byte = ssi->byte_per_period;
}
return rsnd_ssi_init(mod, io, priv);
}
static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
snd_pcm_uframes_t *pointer)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
*pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
return 0;
}
static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
.name = SSI_NAME,
.probe = rsnd_ssi_common_probe,
.remove = rsnd_ssi_common_remove,
.init = rsnd_ssi_pio_init,
.quit = rsnd_ssi_quit,
.start = rsnd_ssi_start,
.stop = rsnd_ssi_stop,
.irq = rsnd_ssi_irq,
.pointer = rsnd_ssi_pio_pointer,
.pcm_new = rsnd_ssi_pcm_new,
.hw_params = rsnd_ssi_hw_params,
};
static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
int ret;
/*
* SSIP/SSIU/IRQ/DMA are not needed on
* SSI Multi slaves
*/
if (rsnd_ssi_is_multi_slave(mod, io))
return 0;
ret = rsnd_ssi_common_probe(mod, io, priv);
if (ret)
return ret;
/* SSI probe might be called many times in MUX multi path */
ret = rsnd_dma_attach(io, mod, &ssi->dma);
return ret;
}
static int rsnd_ssi_fallback(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
/*
* fallback to PIO
*
* SSI .probe might be called again.
* see
* rsnd_rdai_continuance_probe()
*/
mod->ops = &rsnd_ssi_pio_ops;
dev_info(dev, "%s[%d] fallback to PIO mode\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
return 0;
}
static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
int is_play = rsnd_io_is_play(io);
char *name;
if (rsnd_ssi_use_busif(io))
name = is_play ? "rxu" : "txu";
else
name = is_play ? "rx" : "tx";
return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
mod, name);
}
static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
.name = SSI_NAME,
.dma_req = rsnd_ssi_dma_req,
.probe = rsnd_ssi_dma_probe,
.remove = rsnd_ssi_common_remove,
.init = rsnd_ssi_init,
.quit = rsnd_ssi_quit,
.start = rsnd_ssi_start,
.stop = rsnd_ssi_stop,
.irq = rsnd_ssi_irq,
.pcm_new = rsnd_ssi_pcm_new,
.fallback = rsnd_ssi_fallback,
.hw_params = rsnd_ssi_hw_params,
};
int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
{
return mod->ops == &rsnd_ssi_dma_ops;
}
/*
* ssi mod function
*/
static void rsnd_ssi_connect(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
enum rsnd_mod_type types[] = {
RSND_MOD_SSI,
RSND_MOD_SSIM1,
RSND_MOD_SSIM2,
RSND_MOD_SSIM3,
};
enum rsnd_mod_type type;
int i;
/* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
for (i = 0; i < ARRAY_SIZE(types); i++) {
type = types[i];
if (!rsnd_io_to_mod(io, type)) {
rsnd_dai_connect(mod, io, type);
rsnd_rdai_channels_set(rdai, (i + 1) * 2);
rsnd_rdai_ssi_lane_set(rdai, (i + 1));
return;
}
}
}
void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
struct device_node *playback,
struct device_node *capture)
{
struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
struct device_node *node;
struct device_node *np;
struct rsnd_mod *mod;
int i;
node = rsnd_ssi_of_node(priv);
if (!node)
return;
i = 0;
for_each_child_of_node(node, np) {
mod = rsnd_ssi_mod_get(priv, i);
if (np == playback)
rsnd_ssi_connect(mod, &rdai->playback);
if (np == capture)
rsnd_ssi_connect(mod, &rdai->capture);
i++;
}
of_node_put(node);
}
static void __rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
struct rsnd_dai_stream *io,
struct device_node *remote_ep)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
struct rsnd_ssi *ssi;
if (!mod)
return;
ssi = rsnd_mod_to_ssi(mod);
if (strstr(remote_ep->full_name, "hdmi0")) {
rsnd_flags_set(ssi, RSND_SSI_HDMI0);
dev_dbg(dev, "%s[%d] connected to HDMI0\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
}
if (strstr(remote_ep->full_name, "hdmi1")) {
rsnd_flags_set(ssi, RSND_SSI_HDMI1);
dev_dbg(dev, "%s[%d] connected to HDMI1\n",
rsnd_mod_name(mod), rsnd_mod_id(mod));
}
}
void rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
struct device_node *endpoint,
int dai_i)
{
struct rsnd_dai *rdai = rsnd_rdai_get(priv, dai_i);
struct device_node *remote_ep;
remote_ep = of_graph_get_remote_endpoint(endpoint);
if (!remote_ep)
return;
__rsnd_ssi_parse_hdmi_connection(priv, &rdai->playback, remote_ep);
__rsnd_ssi_parse_hdmi_connection(priv, &rdai->capture, remote_ep);
}
struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
{
if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
id = 0;
return rsnd_mod_get(rsnd_ssi_get(priv, id));
}
int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
{
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
return !!(rsnd_flags_has(ssi, RSND_SSI_CLK_PIN_SHARE));
}
static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io,
struct rsnd_mod *mod,
enum rsnd_mod_type type)
{
/*
* SSIP (= SSI parent) needs to be special, otherwise,
* 2nd SSI might doesn't start. see also rsnd_mod_call()
*
* We can't include parent SSI status on SSI, because we don't know
* how many SSI requests parent SSI. Thus, it is localed on "io" now.
* ex) trouble case
* Playback: SSI0
* Capture : SSI1 (needs SSI0)
*
* 1) start Capture -> SSI0/SSI1 are started.
* 2) start Playback -> SSI0 doesn't work, because it is already
* marked as "started" on 1)
*
* OTOH, using each mod's status is good for MUX case.
* It doesn't need to start in 2nd start
* ex)
* IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
* |
* IO-1: SRC1 -> CTU2 -+
*
* 1) start IO-0 -> start SSI0
* 2) start IO-1 -> SSI0 doesn't need to start, because it is
* already started on 1)
*/
if (type == RSND_MOD_SSIP)
return &io->parent_ssi_status;
return rsnd_mod_get_status(io, mod, type);
}
int rsnd_ssi_probe(struct rsnd_priv *priv)
{
struct device_node *node;
struct device_node *np;
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_mod_ops *ops;
struct clk *clk;
struct rsnd_ssi *ssi;
char name[RSND_SSI_NAME_SIZE];
int i, nr, ret;
node = rsnd_ssi_of_node(priv);
if (!node)
return -EINVAL;
nr = of_get_child_count(node);
if (!nr) {
ret = -EINVAL;
goto rsnd_ssi_probe_done;
}
ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL);
if (!ssi) {
ret = -ENOMEM;
goto rsnd_ssi_probe_done;
}
priv->ssi = ssi;
priv->ssi_nr = nr;
i = 0;
for_each_child_of_node(node, np) {
if (!of_device_is_available(np))
goto skip;
ssi = rsnd_ssi_get(priv, i);
snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
SSI_NAME, i);
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
of_node_put(np);
goto rsnd_ssi_probe_done;
}
if (of_get_property(np, "shared-pin", NULL))
rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
if (of_get_property(np, "no-busif", NULL))
rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
ssi->irq = irq_of_parse_and_map(np, 0);
if (!ssi->irq) {
ret = -EINVAL;
of_node_put(np);
goto rsnd_ssi_probe_done;
}
if (of_property_read_bool(np, "pio-transfer"))
ops = &rsnd_ssi_pio_ops;
else
ops = &rsnd_ssi_dma_ops;
ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
rsnd_ssi_get_status, RSND_MOD_SSI, i);
if (ret) {
of_node_put(np);
goto rsnd_ssi_probe_done;
}
skip:
i++;
}
ret = 0;
rsnd_ssi_probe_done:
of_node_put(node);
return ret;
}
void rsnd_ssi_remove(struct rsnd_priv *priv)
{
struct rsnd_ssi *ssi;
int i;
for_each_rsnd_ssi(ssi, priv, i) {
rsnd_mod_quit(rsnd_mod_get(ssi));
}
}