1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car SSIU support
5 // Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
9 #define SSIU_NAME "ssiu"
13 u32 busif_status[8]; /* for BUSIF0 - BUSIF7 */
20 #define TDM_EXT (1 << 0)
21 #define TDM_SPLIT (1 << 8)
23 #define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr)
24 #define rsnd_mod_to_ssiu(_mod) container_of((_mod), struct rsnd_ssiu, mod)
25 #define for_each_rsnd_ssiu(pos, priv, i) \
27 (i < rsnd_ssiu_nr(priv)) && \
28 ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i)); \
45 static const int gen2_id[] = { 0, 4, 8, 12, 13, 14, 15, 16, 17, 18 };
46 static const int gen3_id[] = { 0, 8, 16, 24, 32, 40, 41, 42, 43, 44 };
48 /* enable busif buffer over/under run interrupt. */
49 #define rsnd_ssiu_busif_err_irq_enable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 1)
50 #define rsnd_ssiu_busif_err_irq_disable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 0)
51 static void rsnd_ssiu_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable)
53 int id = rsnd_mod_id(mod);
72 for (i = 0; i < 4; i++) {
73 enum rsnd_reg reg = SSI_SYS_INT_ENABLE((i * 2) + offset);
74 u32 val = 0xf << (shift * 4);
75 u32 sys_int_enable = rsnd_mod_read(mod, reg);
78 sys_int_enable |= val;
80 sys_int_enable &= ~val;
81 rsnd_mod_write(mod, reg, sys_int_enable);
85 bool rsnd_ssiu_busif_err_status_clear(struct rsnd_mod *mod)
88 int id = rsnd_mod_id(mod);
107 for (i = 0; i < 4; i++) {
108 u32 reg = SSI_SYS_STATUS(i * 2) + offset;
109 u32 status = rsnd_mod_read(mod, reg);
110 u32 val = 0xf << (shift * 4);
114 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
115 struct device *dev = rsnd_priv_to_dev(priv);
117 rsnd_print_irq_status(dev, "%s err status : 0x%08x\n",
118 rsnd_mod_name(mod), status);
121 rsnd_mod_write(mod, reg, val);
127 static u32 *rsnd_ssiu_get_status(struct rsnd_mod *mod,
128 struct rsnd_dai_stream *io,
129 enum rsnd_mod_type type)
131 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
132 int busif = rsnd_mod_id_sub(mod);
134 return &ssiu->busif_status[busif];
137 static int rsnd_ssiu_init(struct rsnd_mod *mod,
138 struct rsnd_dai_stream *io,
139 struct rsnd_priv *priv)
141 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
142 u32 ssis = rsnd_ssi_multi_secondaries_runtime(io);
143 int use_busif = rsnd_ssi_use_busif(io);
144 int id = rsnd_mod_id(mod);
145 int is_clk_master = rsnd_rdai_is_clk_master(rdai);
149 rsnd_ssiu_busif_err_status_clear(mod);
154 rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);
157 * SSI_MODE1 / SSI_MODE2
160 * sharing/multi with SSI0 are mainly supported
162 val1 = rsnd_mod_read(mod, SSI_MODE1);
163 val2 = rsnd_mod_read(mod, SSI_MODE2);
164 if (rsnd_ssi_is_pin_sharing(io)) {
172 * set synchronized bit here
175 /* SSI4 is synchronized with SSI3 */
178 /* SSI012 are synchronized */
181 /* SSI0129 are synchronized */
186 /* SSI1 is sharing pin with SSI0 */
188 val1 |= is_clk_master ? 0x2 : 0x1;
190 /* SSI2 is sharing pin with SSI0 */
192 val1 |= is_clk_master ? 0x2 << 2 :
194 /* SSI4 is sharing pin with SSI3 */
196 val1 |= is_clk_master ? 0x2 << 16 :
198 /* SSI9 is sharing pin with SSI0 */
200 val2 |= is_clk_master ? 0x2 : 0x1;
202 rsnd_mod_bset(mod, SSI_MODE1, 0x0013001f, val1);
203 rsnd_mod_bset(mod, SSI_MODE2, 0x00000017, val2);
206 * Enable busif buffer over/under run interrupt.
207 * It will be handled from ssi.c
209 * __rsnd_ssi_interrupt()
211 rsnd_ssiu_busif_err_irq_enable(mod);
216 static int rsnd_ssiu_quit(struct rsnd_mod *mod,
217 struct rsnd_dai_stream *io,
218 struct rsnd_priv *priv)
220 /* disable busif buffer over/under run interrupt. */
221 rsnd_ssiu_busif_err_irq_disable(mod);
226 static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
228 .init = rsnd_ssiu_init,
229 .quit = rsnd_ssiu_quit,
230 .get_status = rsnd_ssiu_get_status,
233 static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
234 struct rsnd_dai_stream *io,
235 struct rsnd_priv *priv)
237 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
238 u32 has_hdmi0 = rsnd_flags_has(io, RSND_STREAM_HDMI0);
239 u32 has_hdmi1 = rsnd_flags_has(io, RSND_STREAM_HDMI1);
243 ret = rsnd_ssiu_init(mod, io, priv);
250 * TDM Extend/Split Mode
252 * rsnd_ssi_config_init()
254 if (rsnd_runtime_is_tdm(io))
256 else if (rsnd_runtime_is_tdm_split(io))
259 rsnd_mod_write(mod, SSI_MODE, mode);
261 if (rsnd_ssi_use_busif(io)) {
262 int id = rsnd_mod_id(mod);
263 int busif = rsnd_mod_id_sub(mod);
264 enum rsnd_reg adinr_reg, mode_reg, dalign_reg;
266 if ((id == 9) && (busif >= 4)) {
267 adinr_reg = SSI9_BUSIF_ADINR(busif);
268 mode_reg = SSI9_BUSIF_MODE(busif);
269 dalign_reg = SSI9_BUSIF_DALIGN(busif);
271 adinr_reg = SSI_BUSIF_ADINR(busif);
272 mode_reg = SSI_BUSIF_MODE(busif);
273 dalign_reg = SSI_BUSIF_DALIGN(busif);
276 rsnd_mod_write(mod, adinr_reg,
277 rsnd_get_adinr_bit(mod, io) |
278 (rsnd_io_is_play(io) ?
279 rsnd_runtime_channel_after_ctu(io) :
280 rsnd_runtime_channel_original(io)));
281 rsnd_mod_write(mod, mode_reg,
282 rsnd_get_busif_shift(io, mod) | 1);
283 rsnd_mod_write(mod, dalign_reg,
284 rsnd_get_dalign(mod, io));
287 if (has_hdmi0 || has_hdmi1) {
288 enum rsnd_mod_type rsnd_ssi_array[] = {
293 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
294 struct rsnd_mod *pos;
298 i = rsnd_mod_id(ssi_mod);
300 /* output all same SSI as default */
307 for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) {
308 int shift = (i * 4) + 20;
310 val = (val & ~(0xF << shift)) |
311 rsnd_mod_id(pos) << shift;
315 rsnd_mod_write(mod, HDMI0_SEL, val);
317 rsnd_mod_write(mod, HDMI1_SEL, val);
323 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
324 struct rsnd_dai_stream *io,
325 struct rsnd_priv *priv)
327 int busif = rsnd_mod_id_sub(mod);
329 if (!rsnd_ssi_use_busif(io))
332 rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 1 << (busif * 4));
334 if (rsnd_ssi_multi_secondaries_runtime(io))
335 rsnd_mod_write(mod, SSI_CONTROL, 0x1);
340 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
341 struct rsnd_dai_stream *io,
342 struct rsnd_priv *priv)
344 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
345 int busif = rsnd_mod_id_sub(mod);
347 if (!rsnd_ssi_use_busif(io))
350 rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 0);
355 if (rsnd_ssi_multi_secondaries_runtime(io))
356 rsnd_mod_write(mod, SSI_CONTROL, 0);
361 static int rsnd_ssiu_id(struct rsnd_mod *mod)
363 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
365 /* see rsnd_ssiu_probe() */
369 static int rsnd_ssiu_id_sub(struct rsnd_mod *mod)
371 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
373 /* see rsnd_ssiu_probe() */
377 static struct dma_chan *rsnd_ssiu_dma_req(struct rsnd_dai_stream *io,
378 struct rsnd_mod *mod)
380 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
381 int is_play = rsnd_io_is_play(io);
385 * It should use "rcar_sound,ssiu" on DT.
386 * But, we need to keep compatibility for old version.
388 * If it has "rcar_sound.ssiu", it will be used.
389 * If not, "rcar_sound.ssi" will be used.
395 name = is_play ? "rx" : "tx";
397 return rsnd_dma_request_channel(rsnd_ssiu_of_node(priv),
398 SSIU_NAME, mod, name);
401 #ifdef CONFIG_DEBUG_FS
402 static void rsnd_ssiu_debug_info(struct seq_file *m,
403 struct rsnd_dai_stream *io,
404 struct rsnd_mod *mod)
406 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSIU,
407 rsnd_mod_id(mod) * 0x80, 0x80);
409 #define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info
414 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
416 .dma_req = rsnd_ssiu_dma_req,
417 .init = rsnd_ssiu_init_gen2,
418 .start = rsnd_ssiu_start_gen2,
419 .stop = rsnd_ssiu_stop_gen2,
420 .get_status = rsnd_ssiu_get_status,
424 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
426 if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
429 return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
432 static void rsnd_parse_connect_ssiu_compatible(struct rsnd_priv *priv,
433 struct rsnd_dai_stream *io)
435 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
436 struct rsnd_ssiu *ssiu;
443 is_dma_mode = rsnd_ssi_is_dma_mode(ssi_mod);
446 for_each_rsnd_ssiu(ssiu, priv, i) {
447 struct rsnd_mod *mod = rsnd_mod_get(ssiu);
450 (rsnd_mod_id(ssi_mod) == rsnd_mod_id(mod)) &&
451 (rsnd_mod_id_sub(mod) == 0)) {
452 rsnd_dai_connect(mod, io, mod->type);
458 void rsnd_parse_connect_ssiu(struct rsnd_dai *rdai,
459 struct device_node *playback,
460 struct device_node *capture)
462 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
463 struct device_node *node = rsnd_ssiu_of_node(priv);
464 struct rsnd_dai_stream *io_p = &rdai->playback;
465 struct rsnd_dai_stream *io_c = &rdai->capture;
467 /* use rcar_sound,ssiu if exist */
469 struct device_node *np;
472 for_each_child_of_node(node, np) {
473 struct rsnd_mod *mod;
475 i = rsnd_node_fixed_index(np, SSIU_NAME, i);
477 mod = rsnd_ssiu_mod_get(priv, i);
480 rsnd_dai_connect(mod, io_p, mod->type);
482 rsnd_dai_connect(mod, io_c, mod->type);
489 /* Keep DT compatibility */
490 if (!rsnd_io_to_mod_ssiu(io_p))
491 rsnd_parse_connect_ssiu_compatible(priv, io_p);
492 if (!rsnd_io_to_mod_ssiu(io_c))
493 rsnd_parse_connect_ssiu_compatible(priv, io_c);
496 int rsnd_ssiu_probe(struct rsnd_priv *priv)
498 struct device *dev = rsnd_priv_to_dev(priv);
499 struct device_node *node;
500 struct rsnd_ssiu *ssiu;
501 struct rsnd_mod_ops *ops;
502 const int *list = NULL;
506 * Keep DT compatibility.
507 * if it has "rcar_sound,ssiu", use it.
508 * if not, use "rcar_sound,ssi"
510 * rsnd_ssiu_bufsif_to_id()
512 node = rsnd_ssiu_of_node(priv);
514 nr = rsnd_node_count(priv, node, SSIU_NAME);
521 ssiu = devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL);
528 if (rsnd_is_gen1(priv))
529 ops = &rsnd_ssiu_ops_gen1;
531 ops = &rsnd_ssiu_ops_gen2;
533 /* Keep compatibility */
536 (ops == &rsnd_ssiu_ops_gen2)) {
537 ops->id = rsnd_ssiu_id;
538 ops->id_sub = rsnd_ssiu_id_sub;
540 if (rsnd_is_gen2(priv)) {
542 nr = ARRAY_SIZE(gen2_id);
543 } else if (rsnd_is_gen3(priv)) {
545 nr = ARRAY_SIZE(gen3_id);
547 dev_err(dev, "unknown SSIU\n");
552 for_each_rsnd_ssiu(ssiu, priv, i) {
561 * rsnd_ssiu_get_id_sub()
563 for (j = 0; j < nr; j++) {
567 ssiu->id_sub = i - list[ssiu->id];
573 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
574 ops, NULL, RSND_MOD_SSIU, i);
582 void rsnd_ssiu_remove(struct rsnd_priv *priv)
584 struct rsnd_ssiu *ssiu;
587 for_each_rsnd_ssiu(ssiu, priv, i) {
588 rsnd_mod_quit(rsnd_mod_get(ssiu));