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linux_dsm_epyc7002/sound/soc/sh/rcar/dma.c
Kuninori Morimoto 4e7788fb80
ASoC: rsnd: add SSIU BUSIF support 
Gen2 has BUSIF0-3, Gen3 has BUSIF0-7 on some SSIU.
Current driver is assuming it is using BUSIF0 as default.
Thus, SSI is attaching SSIU (with BUSIF0) by using rsnd_ssiu_attach().
But, TDM split mode also needs other BUSIF to use it.
This patch adds missing SSIU BUSIFx support.

BUSIF is handled by SSIU instead of SSI anymore.
Thus, its settings no longer needed on SSI node on DT.
This patch removes its settings from Document, but driver is still
keeping compatibility. Thus, old DT style is still working.
But, to avoid confusing, it doesn't indicate old compatibility things on
Document. New SoC should have SSIU on DT from this patch.

1) old style DT is still supported (= no rcar_sound,ssiu node on DT)
2) If ssiu is not indicated on playback/capture,
   BUSIF0 will be used as default
	playback = <&ssi3>; /* ssiu30 will be selected */
3) you can select own ssiu
	playback = <&ssi32 &ssi3>; /* ssiu32 will be selected */

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-11-06 17:40:10 +00:00

850 lines
21 KiB
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Raw Blame History

// SPDX-License-Identifier: GPL-2.0
//
// Renesas R-Car Audio DMAC support
//
// Copyright (C) 2015 Renesas Electronics Corp.
// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
#include <linux/delay.h>
#include <linux/of_dma.h>
#include "rsnd.h"
/*
* Audio DMAC peri peri register
*/
#define PDMASAR 0x00
#define PDMADAR 0x04
#define PDMACHCR 0x0c
/* PDMACHCR */
#define PDMACHCR_DE (1 << 0)
struct rsnd_dmaen {
struct dma_chan *chan;
dma_cookie_t cookie;
unsigned int dma_len;
};
struct rsnd_dmapp {
int dmapp_id;
u32 chcr;
};
struct rsnd_dma {
struct rsnd_mod mod;
struct rsnd_mod *mod_from;
struct rsnd_mod *mod_to;
dma_addr_t src_addr;
dma_addr_t dst_addr;
union {
struct rsnd_dmaen en;
struct rsnd_dmapp pp;
} dma;
};
struct rsnd_dma_ctrl {
void __iomem *base;
int dmaen_num;
int dmapp_num;
};
#define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma)
#define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod)
#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
/* for DEBUG */
static struct rsnd_mod_ops mem_ops = {
.name = "mem",
};
static struct rsnd_mod mem = {
};
/*
* Audio DMAC
*/
static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
struct rsnd_dai_stream *io)
{
if (rsnd_io_is_working(io))
rsnd_dai_period_elapsed(io);
}
static void rsnd_dmaen_complete(void *data)
{
struct rsnd_mod *mod = data;
rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
}
static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io,
struct rsnd_mod *mod_from,
struct rsnd_mod *mod_to)
{
if ((!mod_from && !mod_to) ||
(mod_from && mod_to))
return NULL;
if (mod_from)
return rsnd_mod_dma_req(io, mod_from);
else
return rsnd_mod_dma_req(io, mod_to);
}
static int rsnd_dmaen_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
if (dmaen->chan)
dmaengine_terminate_all(dmaen->chan);
return 0;
}
static int rsnd_dmaen_cleanup(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
/*
* DMAEngine release uses mutex lock.
* Thus, it shouldn't be called under spinlock.
* Let's call it under prepare
*/
if (dmaen->chan)
dma_release_channel(dmaen->chan);
dmaen->chan = NULL;
return 0;
}
static int rsnd_dmaen_prepare(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
struct device *dev = rsnd_priv_to_dev(priv);
/* maybe suspended */
if (dmaen->chan)
return 0;
/*
* DMAEngine request uses mutex lock.
* Thus, it shouldn't be called under spinlock.
* Let's call it under prepare
*/
dmaen->chan = rsnd_dmaen_request_channel(io,
dma->mod_from,
dma->mod_to);
if (IS_ERR_OR_NULL(dmaen->chan)) {
dmaen->chan = NULL;
dev_err(dev, "can't get dma channel\n");
return -EIO;
}
return 0;
}
static int rsnd_dmaen_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
struct snd_pcm_substream *substream = io->substream;
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_async_tx_descriptor *desc;
struct dma_slave_config cfg = {};
int is_play = rsnd_io_is_play(io);
int ret;
cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
cfg.src_addr = dma->src_addr;
cfg.dst_addr = dma->dst_addr;
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dev_dbg(dev, "%s %pad -> %pad\n",
rsnd_mod_name(mod),
&cfg.src_addr, &cfg.dst_addr);
ret = dmaengine_slave_config(dmaen->chan, &cfg);
if (ret < 0)
return ret;
desc = dmaengine_prep_dma_cyclic(dmaen->chan,
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream),
is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
return -EIO;
}
desc->callback = rsnd_dmaen_complete;
desc->callback_param = rsnd_mod_get(dma);
dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
dmaen->cookie = dmaengine_submit(desc);
if (dmaen->cookie < 0) {
dev_err(dev, "dmaengine_submit() fail\n");
return -EIO;
}
dma_async_issue_pending(dmaen->chan);
return 0;
}
struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node,
struct rsnd_mod *mod, char *name)
{
struct dma_chan *chan = NULL;
struct device_node *np;
int i = 0;
for_each_child_of_node(of_node, np) {
if (i == rsnd_mod_id_raw(mod) && (!chan))
chan = of_dma_request_slave_channel(np, name);
i++;
}
/* It should call of_node_put(), since, it is rsnd_xxx_of_node() */
of_node_put(of_node);
return chan;
}
static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
struct rsnd_dma *dma,
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct dma_chan *chan;
/* try to get DMAEngine channel */
chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
if (IS_ERR_OR_NULL(chan)) {
/* Let's follow when -EPROBE_DEFER case */
if (PTR_ERR(chan) == -EPROBE_DEFER)
return PTR_ERR(chan);
/*
* DMA failed. try to PIO mode
* see
* rsnd_ssi_fallback()
* rsnd_rdai_continuance_probe()
*/
return -EAGAIN;
}
/*
* use it for IPMMU if needed
* see
* rsnd_preallocate_pages()
*/
io->dmac_dev = chan->device->dev;
dma_release_channel(chan);
dmac->dmaen_num++;
return 0;
}
static int rsnd_dmaen_pointer(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
snd_pcm_uframes_t *pointer)
{
struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
struct dma_tx_state state;
enum dma_status status;
unsigned int pos = 0;
status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state);
if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
if (state.residue > 0 && state.residue <= dmaen->dma_len)
pos = dmaen->dma_len - state.residue;
}
*pointer = bytes_to_frames(runtime, pos);
return 0;
}
static struct rsnd_mod_ops rsnd_dmaen_ops = {
.name = "audmac",
.prepare = rsnd_dmaen_prepare,
.cleanup = rsnd_dmaen_cleanup,
.start = rsnd_dmaen_start,
.stop = rsnd_dmaen_stop,
.pointer = rsnd_dmaen_pointer,
.get_status = rsnd_mod_get_status,
};
/*
* Audio DMAC peri peri
*/
static const u8 gen2_id_table_ssiu[] = {
/* SSI00 ~ SSI07 */
0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c,
/* SSI10 ~ SSI17 */
0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40,
/* SSI20 ~ SSI27 */
0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44,
/* SSI30 ~ SSI37 */
0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
/* SSI40 ~ SSI47 */
0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52,
/* SSI5 */
0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* SSI6 */
0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* SSI7 */
0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* SSI8 */
0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* SSI90 ~ SSI97 */
0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56,
};
static const u8 gen2_id_table_scu[] = {
0x2d, /* SCU_SRCI0 */
0x2e, /* SCU_SRCI1 */
0x2f, /* SCU_SRCI2 */
0x30, /* SCU_SRCI3 */
0x31, /* SCU_SRCI4 */
0x32, /* SCU_SRCI5 */
0x33, /* SCU_SRCI6 */
0x34, /* SCU_SRCI7 */
0x35, /* SCU_SRCI8 */
0x36, /* SCU_SRCI9 */
};
static const u8 gen2_id_table_cmd[] = {
0x37, /* SCU_CMD0 */
0x38, /* SCU_CMD1 */
};
static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
struct rsnd_mod *src = rsnd_io_to_mod_src(io);
struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
const u8 *entry = NULL;
int id = 255;
int size = 0;
if ((mod == ssi) ||
(mod == ssiu)) {
int busif = rsnd_mod_id_sub(ssiu);
entry = gen2_id_table_ssiu;
size = ARRAY_SIZE(gen2_id_table_ssiu);
id = (rsnd_mod_id(mod) * 8) + busif;
} else if (mod == src) {
entry = gen2_id_table_scu;
size = ARRAY_SIZE(gen2_id_table_scu);
id = rsnd_mod_id(mod);
} else if (mod == dvc) {
entry = gen2_id_table_cmd;
size = ARRAY_SIZE(gen2_id_table_cmd);
id = rsnd_mod_id(mod);
}
if ((!entry) || (size <= id)) {
struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod));
/* use non-prohibited SRS number as error */
return 0x00; /* SSI00 */
}
return entry[id];
}
static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
struct rsnd_mod *mod_from,
struct rsnd_mod *mod_to)
{
return (rsnd_dmapp_get_id(io, mod_from) << 24) +
(rsnd_dmapp_get_id(io, mod_to) << 16);
}
#define rsnd_dmapp_addr(dmac, dma, reg) \
(dmac->base + 0x20 + reg + \
(0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
{
struct rsnd_mod *mod = rsnd_mod_get(dma);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
}
static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
{
struct rsnd_mod *mod = rsnd_mod_get(dma);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
}
static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg)
{
struct rsnd_mod *mod = rsnd_mod_get(dma);
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg);
u32 val = ioread32(addr);
val &= ~mask;
val |= (data & mask);
iowrite32(val, addr);
}
static int rsnd_dmapp_stop(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
int i;
rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR);
for (i = 0; i < 1024; i++) {
if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE))
return 0;
udelay(1);
}
return -EIO;
}
static int rsnd_dmapp_start(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
return 0;
}
static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
struct rsnd_dma *dma,
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
{
struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
dmapp->dmapp_id = dmac->dmapp_num;
dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
dmac->dmapp_num++;
dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
return 0;
}
static struct rsnd_mod_ops rsnd_dmapp_ops = {
.name = "audmac-pp",
.start = rsnd_dmapp_start,
.stop = rsnd_dmapp_stop,
.quit = rsnd_dmapp_stop,
.get_status = rsnd_mod_get_status,
};
/*
* Common DMAC Interface
*/
/*
* DMA read/write register offset
*
* RSND_xxx_I_N for Audio DMAC input
* RSND_xxx_O_N for Audio DMAC output
* RSND_xxx_I_P for Audio DMAC peri peri input
* RSND_xxx_O_P for Audio DMAC peri peri output
*
* ex) R-Car H2 case
* mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out
* SSI : 0xec541000 / 0xec241008 / 0xec24100c
* SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
* SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
* CMD : 0xec500000 / / 0xec008000 0xec308000
*/
#define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
#define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
#define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400))
#define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j)
#define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400))
#define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j)
#define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
#define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
#define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
#define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
#define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
#define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
static dma_addr_t
rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
struct rsnd_mod *mod,
int is_play, int is_from)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct device *dev = rsnd_priv_to_dev(priv);
phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) ||
!!(rsnd_io_to_mod_ssiu(io) == mod);
int use_src = !!rsnd_io_to_mod_src(io);
int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
!!rsnd_io_to_mod_mix(io) ||
!!rsnd_io_to_mod_ctu(io);
int id = rsnd_mod_id(mod);
int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io));
struct dma_addr {
dma_addr_t out_addr;
dma_addr_t in_addr;
} dma_addrs[3][2][3] = {
/* SRC */
/* Capture */
{{{ 0, 0 },
{ RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
{ RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
/* Playback */
{{ 0, 0, },
{ RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
{ RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
},
/* SSI */
/* Capture */
{{{ RDMA_SSI_O_N(ssi, id), 0 },
{ RDMA_SSIU_O_P(ssi, id, busif), 0 },
{ RDMA_SSIU_O_P(ssi, id, busif), 0 } },
/* Playback */
{{ 0, RDMA_SSI_I_N(ssi, id) },
{ 0, RDMA_SSIU_I_P(ssi, id, busif) },
{ 0, RDMA_SSIU_I_P(ssi, id, busif) } }
},
/* SSIU */
/* Capture */
{{{ RDMA_SSIU_O_N(ssi, id, busif), 0 },
{ RDMA_SSIU_O_P(ssi, id, busif), 0 },
{ RDMA_SSIU_O_P(ssi, id, busif), 0 } },
/* Playback */
{{ 0, RDMA_SSIU_I_N(ssi, id, busif) },
{ 0, RDMA_SSIU_I_P(ssi, id, busif) },
{ 0, RDMA_SSIU_I_P(ssi, id, busif) } } },
};
/*
* FIXME
*
* We can't support SSI9-4/5/6/7, because its address is
* out of calculation rule
*/
if ((id == 9) && (busif >= 4))
dev_err(dev, "This driver doesn't support SSI%d-%d, so far",
id, busif);
/* it shouldn't happen */
if (use_cmd && !use_src)
dev_err(dev, "DVC is selected without SRC\n");
/* use SSIU or SSI ? */
if (is_ssi && rsnd_ssi_use_busif(io))
is_ssi++;
return (is_from) ?
dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
}
static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
struct rsnd_mod *mod,
int is_play, int is_from)
{
struct rsnd_priv *priv = rsnd_io_to_priv(io);
/*
* gen1 uses default DMA addr
*/
if (rsnd_is_gen1(priv))
return 0;
if (!mod)
return 0;
return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
}
#define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
static void rsnd_dma_of_path(struct rsnd_mod *this,
struct rsnd_dai_stream *io,
int is_play,
struct rsnd_mod **mod_from,
struct rsnd_mod **mod_to)
{
struct rsnd_mod *ssi;
struct rsnd_mod *src = rsnd_io_to_mod_src(io);
struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
struct rsnd_mod *mod[MOD_MAX];
struct rsnd_mod *mod_start, *mod_end;
struct rsnd_priv *priv = rsnd_mod_to_priv(this);
struct device *dev = rsnd_priv_to_dev(priv);
int nr, i, idx;
/*
* It should use "rcar_sound,ssiu" on DT.
* But, we need to keep compatibility for old version.
*
* If it has "rcar_sound.ssiu", it will be used.
* If not, "rcar_sound.ssi" will be used.
* see
* rsnd_ssiu_dma_req()
* rsnd_ssi_dma_req()
*/
if (rsnd_ssiu_of_node(priv)) {
struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
/* use SSIU */
ssi = ssiu;
if (this == rsnd_io_to_mod_ssi(io))
this = ssiu;
} else {
/* keep compatible, use SSI */
ssi = rsnd_io_to_mod_ssi(io);
}
if (!ssi)
return;
nr = 0;
for (i = 0; i < MOD_MAX; i++) {
mod[i] = NULL;
nr += !!rsnd_io_to_mod(io, i);
}
/*
* [S] -*-> [E]
* [S] -*-> SRC -o-> [E]
* [S] -*-> SRC -> DVC -o-> [E]
* [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
*
* playback [S] = mem
* [E] = SSI
*
* capture [S] = SSI
* [E] = mem
*
* -*-> Audio DMAC
* -o-> Audio DMAC peri peri
*/
mod_start = (is_play) ? NULL : ssi;
mod_end = (is_play) ? ssi : NULL;
idx = 0;
mod[idx++] = mod_start;
for (i = 1; i < nr; i++) {
if (src) {
mod[idx++] = src;
src = NULL;
} else if (ctu) {
mod[idx++] = ctu;
ctu = NULL;
} else if (mix) {
mod[idx++] = mix;
mix = NULL;
} else if (dvc) {
mod[idx++] = dvc;
dvc = NULL;
}
}
mod[idx] = mod_end;
/*
* | SSI | SRC |
* -------------+-----+-----+
* is_play | o | * |
* !is_play | * | o |
*/
if ((this == ssi) == (is_play)) {
*mod_from = mod[idx - 1];
*mod_to = mod[idx];
} else {
*mod_from = mod[0];
*mod_to = mod[1];
}
dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this));
for (i = 0; i <= idx; i++) {
dev_dbg(dev, " %s%s\n",
rsnd_mod_name(mod[i] ? mod[i] : &mem),
(mod[i] == *mod_from) ? " from" :
(mod[i] == *mod_to) ? " to" : "");
}
}
static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
struct rsnd_mod **dma_mod)
{
struct rsnd_mod *mod_from = NULL;
struct rsnd_mod *mod_to = NULL;
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_dma *dma;
struct rsnd_mod_ops *ops;
enum rsnd_mod_type type;
int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
int is_play = rsnd_io_is_play(io);
int ret, dma_id;
/*
* DMA failed. try to PIO mode
* see
* rsnd_ssi_fallback()
* rsnd_rdai_continuance_probe()
*/
if (!dmac)
return -EAGAIN;
rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
/* for Gen2 or later */
if (mod_from && mod_to) {
ops = &rsnd_dmapp_ops;
attach = rsnd_dmapp_attach;
dma_id = dmac->dmapp_num;
type = RSND_MOD_AUDMAPP;
} else {
ops = &rsnd_dmaen_ops;
attach = rsnd_dmaen_attach;
dma_id = dmac->dmaen_num;
type = RSND_MOD_AUDMA;
}
/* for Gen1, overwrite */
if (rsnd_is_gen1(priv)) {
ops = &rsnd_dmaen_ops;
attach = rsnd_dmaen_attach;
dma_id = dmac->dmaen_num;
type = RSND_MOD_AUDMA;
}
dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
if (!dma)
return -ENOMEM;
*dma_mod = rsnd_mod_get(dma);
ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
type, dma_id);
if (ret < 0)
return ret;
dev_dbg(dev, "%s %s -> %s\n",
rsnd_mod_name(*dma_mod),
rsnd_mod_name(mod_from ? mod_from : &mem),
rsnd_mod_name(mod_to ? mod_to : &mem));
ret = attach(io, dma, mod_from, mod_to);
if (ret < 0)
return ret;
dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
dma->mod_from = mod_from;
dma->mod_to = mod_to;
return 0;
}
int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
struct rsnd_mod **dma_mod)
{
if (!(*dma_mod)) {
int ret = rsnd_dma_alloc(io, mod, dma_mod);
if (ret < 0)
return ret;
}
return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);
}
int rsnd_dma_probe(struct rsnd_priv *priv)
{
struct platform_device *pdev = rsnd_priv_to_pdev(priv);
struct device *dev = rsnd_priv_to_dev(priv);
struct rsnd_dma_ctrl *dmac;
struct resource *res;
/*
* for Gen1
*/
if (rsnd_is_gen1(priv))
return 0;
/*
* for Gen2 or later
*/
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
if (!dmac || !res) {
dev_err(dev, "dma allocate failed\n");
return 0; /* it will be PIO mode */
}
dmac->dmapp_num = 0;
dmac->base = devm_ioremap_resource(dev, res);
if (IS_ERR(dmac->base))
return PTR_ERR(dmac->base);
priv->dma = dmac;
/* dummy mem mod for debug */
return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0);
}
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