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// SPDX-License-Identifier: GPL-2.0
//
// Renesas R-Car SSIU support
//
// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
#include "rsnd.h"
#define SSIU_NAME "ssiu"
struct rsnd_ssiu {
struct rsnd_mod mod;
u32 busif_status[8]; /* for BUSIF0 - BUSIF7 */
unsigned int usrcnt;
int id;
int id_sub;
};
/* SSI_MODE */
#define TDM_EXT (1 << 0)
#define TDM_SPLIT (1 << 8)
#define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr)
#define rsnd_mod_to_ssiu(_mod) container_of((_mod), struct rsnd_ssiu, mod)
#define for_each_rsnd_ssiu(pos, priv, i) \
for (i = 0; \
(i < rsnd_ssiu_nr(priv)) && \
((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i)); \
i++)
/*
* SSI Gen2 Gen3
* 0 BUSIF0-3 BUSIF0-7
* 1 BUSIF0-3 BUSIF0-7
* 2 BUSIF0-3 BUSIF0-7
* 3 BUSIF0 BUSIF0-7
* 4 BUSIF0 BUSIF0-7
* 5 BUSIF0 BUSIF0
* 6 BUSIF0 BUSIF0
* 7 BUSIF0 BUSIF0
* 8 BUSIF0 BUSIF0
* 9 BUSIF0-3 BUSIF0-7
* total 22 52
*/
static const int gen2_id[] = { 0, 4, 8, 12, 13, 14, 15, 16, 17, 18 };
static const int gen3_id[] = { 0, 8, 16, 24, 32, 40, 41, 42, 43, 44 };
/* enable busif buffer over/under run interrupt. */
#define rsnd_ssiu_busif_err_irq_enable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 1)
#define rsnd_ssiu_busif_err_irq_disable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 0)
static void rsnd_ssiu_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable)
{
int id = rsnd_mod_id(mod);
int shift, offset;
int i;
switch (id) {
case 0:
case 1:
case 2:
case 3:
case 4:
shift = id;
offset = 0;
break;
case 9:
shift = 1;
offset = 1;
break;
}
for (i = 0; i < 4; i++) {
enum rsnd_reg reg = SSI_SYS_INT_ENABLE((i * 2) + offset);
u32 val = 0xf << (shift * 4);
u32 sys_int_enable = rsnd_mod_read(mod, reg);
if (enable)
sys_int_enable |= val;
else
sys_int_enable &= ~val;
rsnd_mod_write(mod, reg, sys_int_enable);
}
}
bool rsnd_ssiu_busif_err_status_clear(struct rsnd_mod *mod)
{
bool error = false;
int id = rsnd_mod_id(mod);
int shift, offset;
int i;
switch (id) {
case 0:
case 1:
case 2:
case 3:
case 4:
shift = id;
offset = 0;
break;
case 9:
shift = 1;
offset = 1;
break;
default:
goto out;
}
for (i = 0; i < 4; i++) {
u32 reg = SSI_SYS_STATUS(i * 2) + offset;
u32 status = rsnd_mod_read(mod, reg);
u32 val = 0xf << (shift * 4);
status &= val;
if (status) {
struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
struct device *dev = rsnd_priv_to_dev(priv);
rsnd_print_irq_status(dev, "%s err status : 0x%08x\n",
rsnd_mod_name(mod), status);
error = true;
}
rsnd_mod_write(mod, reg, val);
}
out:
return error;
}
static u32 *rsnd_ssiu_get_status(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
enum rsnd_mod_type type)
{
struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
int busif = rsnd_mod_id_sub(mod);
return &ssiu->busif_status[busif];
}
static int rsnd_ssiu_init(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
u32 ssis = rsnd_ssi_multi_secondaries_runtime(io);
int use_busif = rsnd_ssi_use_busif(io);
int id = rsnd_mod_id(mod);
int is_clk_master = rsnd_rdai_is_clk_master(rdai);
u32 val1, val2;
/* clear status */
rsnd_ssiu_busif_err_status_clear(mod);
/*
* SSI_MODE0
*/
rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);
/*
* SSI_MODE1 / SSI_MODE2
*
* FIXME
* sharing/multi with SSI0 are mainly supported
*/
val1 = rsnd_mod_read(mod, SSI_MODE1);
val2 = rsnd_mod_read(mod, SSI_MODE2);
if (rsnd_ssi_is_pin_sharing(io)) {
ssis |= (1 << id);
} else if (ssis) {
/*
* Multi SSI
*
* set synchronized bit here
*/
/* SSI4 is synchronized with SSI3 */
if (ssis & (1 << 4))
val1 |= (1 << 20);
/* SSI012 are synchronized */
if (ssis == 0x0006)
val1 |= (1 << 4);
/* SSI0129 are synchronized */
if (ssis == 0x0206)
val2 |= (1 << 4);
}
/* SSI1 is sharing pin with SSI0 */
if (ssis & (1 << 1))
val1 |= is_clk_master ? 0x2 : 0x1;
/* SSI2 is sharing pin with SSI0 */
if (ssis & (1 << 2))
val1 |= is_clk_master ? 0x2 << 2 :
0x1 << 2;
/* SSI4 is sharing pin with SSI3 */
if (ssis & (1 << 4))
val1 |= is_clk_master ? 0x2 << 16 :
0x1 << 16;
/* SSI9 is sharing pin with SSI0 */
if (ssis & (1 << 9))
val2 |= is_clk_master ? 0x2 : 0x1;
rsnd_mod_bset(mod, SSI_MODE1, 0x0013001f, val1);
rsnd_mod_bset(mod, SSI_MODE2, 0x00000017, val2);
/*
* Enable busif buffer over/under run interrupt.
* It will be handled from ssi.c
* see
* __rsnd_ssi_interrupt()
*/
rsnd_ssiu_busif_err_irq_enable(mod);
return 0;
}
static int rsnd_ssiu_quit(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
/* disable busif buffer over/under run interrupt. */
rsnd_ssiu_busif_err_irq_disable(mod);
return 0;
}
static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
.name = SSIU_NAME,
.init = rsnd_ssiu_init,
.quit = rsnd_ssiu_quit,
.get_status = rsnd_ssiu_get_status,
};
static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
u32 has_hdmi0 = rsnd_flags_has(io, RSND_STREAM_HDMI0);
u32 has_hdmi1 = rsnd_flags_has(io, RSND_STREAM_HDMI1);
int ret;
u32 mode = 0;
ret = rsnd_ssiu_init(mod, io, priv);
if (ret < 0)
return ret;
ssiu->usrcnt++;
/*
* TDM Extend/Split Mode
* see
* rsnd_ssi_config_init()
*/
if (rsnd_runtime_is_tdm(io))
mode = TDM_EXT;
else if (rsnd_runtime_is_tdm_split(io))
mode = TDM_SPLIT;
rsnd_mod_write(mod, SSI_MODE, mode);
if (rsnd_ssi_use_busif(io)) {
int id = rsnd_mod_id(mod);
int busif = rsnd_mod_id_sub(mod);
enum rsnd_reg adinr_reg, mode_reg, dalign_reg;
if ((id == 9) && (busif >= 4)) {
adinr_reg = SSI9_BUSIF_ADINR(busif);
mode_reg = SSI9_BUSIF_MODE(busif);
dalign_reg = SSI9_BUSIF_DALIGN(busif);
} else {
adinr_reg = SSI_BUSIF_ADINR(busif);
mode_reg = SSI_BUSIF_MODE(busif);
dalign_reg = SSI_BUSIF_DALIGN(busif);
}
rsnd_mod_write(mod, adinr_reg,
rsnd_get_adinr_bit(mod, io) |
(rsnd_io_is_play(io) ?
rsnd_runtime_channel_after_ctu(io) :
rsnd_runtime_channel_original(io)));
rsnd_mod_write(mod, mode_reg,
rsnd_get_busif_shift(io, mod) | 1);
rsnd_mod_write(mod, dalign_reg,
rsnd_get_dalign(mod, io));
}
if (has_hdmi0 || has_hdmi1) {
enum rsnd_mod_type rsnd_ssi_array[] = {
RSND_MOD_SSIM1,
RSND_MOD_SSIM2,
RSND_MOD_SSIM3,
};
struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
struct rsnd_mod *pos;
u32 val;
int i;
i = rsnd_mod_id(ssi_mod);
/* output all same SSI as default */
val = i << 16 |
i << 20 |
i << 24 |
i << 28 |
i;
for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) {
int shift = (i * 4) + 20;
val = (val & ~(0xF << shift)) |
rsnd_mod_id(pos) << shift;
}
if (has_hdmi0)
rsnd_mod_write(mod, HDMI0_SEL, val);
if (has_hdmi1)
rsnd_mod_write(mod, HDMI1_SEL, val);
}
return 0;
}
static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
int busif = rsnd_mod_id_sub(mod);
if (!rsnd_ssi_use_busif(io))
return 0;
rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 1 << (busif * 4));
if (rsnd_ssi_multi_secondaries_runtime(io))
rsnd_mod_write(mod, SSI_CONTROL, 0x1);
return 0;
}
static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
struct rsnd_dai_stream *io,
struct rsnd_priv *priv)
{
struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
int busif = rsnd_mod_id_sub(mod);
if (!rsnd_ssi_use_busif(io))
return 0;
rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 0);
if (--ssiu->usrcnt)
return 0;
if (rsnd_ssi_multi_secondaries_runtime(io))
rsnd_mod_write(mod, SSI_CONTROL, 0);
return 0;
}
static int rsnd_ssiu_id(struct rsnd_mod *mod)
{
struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
/* see rsnd_ssiu_probe() */
return ssiu->id;
}
static int rsnd_ssiu_id_sub(struct rsnd_mod *mod)
{
struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
/* see rsnd_ssiu_probe() */
return ssiu->id_sub;
}
static struct dma_chan *rsnd_ssiu_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;
/*
* 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_ssi_dma_req()
* rsnd_dma_of_path()
*/
name = is_play ? "rx" : "tx";
return rsnd_dma_request_channel(rsnd_ssiu_of_node(priv),
SSIU_NAME, mod, name);
}
#ifdef CONFIG_DEBUG_FS
static void rsnd_ssiu_debug_info(struct seq_file *m,
struct rsnd_dai_stream *io,
struct rsnd_mod *mod)
{
rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSIU,
rsnd_mod_id(mod) * 0x80, 0x80);
}
#define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info
#else
#define DEBUG_INFO
#endif
static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
.name = SSIU_NAME,
.dma_req = rsnd_ssiu_dma_req,
.init = rsnd_ssiu_init_gen2,
.start = rsnd_ssiu_start_gen2,
.stop = rsnd_ssiu_stop_gen2,
.get_status = rsnd_ssiu_get_status,
DEBUG_INFO
};
static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
{
if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
id = 0;
return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
}
static void rsnd_parse_connect_ssiu_compatible(struct rsnd_priv *priv,
struct rsnd_dai_stream *io)
{
struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
struct rsnd_ssiu *ssiu;
int is_dma_mode;
int i;
if (!ssi_mod)
return;
is_dma_mode = rsnd_ssi_is_dma_mode(ssi_mod);
/* select BUSIF0 */
for_each_rsnd_ssiu(ssiu, priv, i) {
struct rsnd_mod *mod = rsnd_mod_get(ssiu);
if (is_dma_mode &&
(rsnd_mod_id(ssi_mod) == rsnd_mod_id(mod)) &&
(rsnd_mod_id_sub(mod) == 0)) {
rsnd_dai_connect(mod, io, mod->type);
return;
}
}
}
void rsnd_parse_connect_ssiu(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 = rsnd_ssiu_of_node(priv);
struct rsnd_dai_stream *io_p = &rdai->playback;
struct rsnd_dai_stream *io_c = &rdai->capture;
/* use rcar_sound,ssiu if exist */
if (node) {
struct device_node *np;
int i = 0;
for_each_child_of_node(node, np) {
struct rsnd_mod *mod;
i = rsnd_node_fixed_index(np, SSIU_NAME, i);
mod = rsnd_ssiu_mod_get(priv, i);
if (np == playback)
rsnd_dai_connect(mod, io_p, mod->type);
if (np == capture)
rsnd_dai_connect(mod, io_c, mod->type);
i++;
}
of_node_put(node);
}
/* Keep DT compatibility */
if (!rsnd_io_to_mod_ssiu(io_p))
rsnd_parse_connect_ssiu_compatible(priv, io_p);
if (!rsnd_io_to_mod_ssiu(io_c))
rsnd_parse_connect_ssiu_compatible(priv, io_c);
}
int rsnd_ssiu_probe(struct rsnd_priv *priv)
{
struct device *dev = rsnd_priv_to_dev(priv);
struct device_node *node;
struct rsnd_ssiu *ssiu;
struct rsnd_mod_ops *ops;
const int *list = NULL;
int i, nr;
/*
* Keep DT compatibility.
* if it has "rcar_sound,ssiu", use it.
* if not, use "rcar_sound,ssi"
* see
* rsnd_ssiu_bufsif_to_id()
*/
node = rsnd_ssiu_of_node(priv);
if (node)
nr = rsnd_node_count(priv, node, SSIU_NAME);
else
nr = priv->ssi_nr;
if (!nr)
return -EINVAL;
ssiu = devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL);
if (!ssiu)
return -ENOMEM;
priv->ssiu = ssiu;
priv->ssiu_nr = nr;
if (rsnd_is_gen1(priv))
ops = &rsnd_ssiu_ops_gen1;
else
ops = &rsnd_ssiu_ops_gen2;
/* Keep compatibility */
nr = 0;
if ((node) &&
(ops == &rsnd_ssiu_ops_gen2)) {
ops->id = rsnd_ssiu_id;
ops->id_sub = rsnd_ssiu_id_sub;
if (rsnd_is_gen2(priv)) {
list = gen2_id;
nr = ARRAY_SIZE(gen2_id);
} else if (rsnd_is_gen3(priv)) {
list = gen3_id;
nr = ARRAY_SIZE(gen3_id);
} else {
dev_err(dev, "unknown SSIU\n");
return -ENODEV;
}
}
for_each_rsnd_ssiu(ssiu, priv, i) {
int ret;
if (node) {
int j;
/*
* see
* rsnd_ssiu_get_id()
* rsnd_ssiu_get_id_sub()
*/
for (j = 0; j < nr; j++) {
if (list[j] > i)
break;
ssiu->id = j;
ssiu->id_sub = i - list[ssiu->id];
}
} else {
ssiu->id = i;
}
ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
ops, NULL, RSND_MOD_SSIU, i);
if (ret)
return ret;
}
return 0;
}
void rsnd_ssiu_remove(struct rsnd_priv *priv)
{
struct rsnd_ssiu *ssiu;
int i;
for_each_rsnd_ssiu(ssiu, priv, i) {
rsnd_mod_quit(rsnd_mod_get(ssiu));
}
}
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