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)); \
33 * 0 BUSIF0-3 BUSIF0-7 BUSIF0-7
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 };
47 static const int gen4_id[] = { 0 };
49 /* enable busif buffer over/under run interrupt. */
50 #define rsnd_ssiu_busif_err_irq_enable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 1)
51 #define rsnd_ssiu_busif_err_irq_disable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 0)
52 static void rsnd_ssiu_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable)
54 int id = rsnd_mod_id(mod);
75 for (i = 0; i < 4; i++) {
76 enum rsnd_reg reg = SSI_SYS_INT_ENABLE((i * 2) + offset);
77 u32 val = 0xf << (shift * 4);
78 u32 sys_int_enable = rsnd_mod_read(mod, reg);
81 sys_int_enable |= val;
83 sys_int_enable &= ~val;
84 rsnd_mod_write(mod, reg, sys_int_enable);
88 bool rsnd_ssiu_busif_err_status_clear(struct rsnd_mod *mod)
91 int id = rsnd_mod_id(mod);
112 for (i = 0; i < 4; i++) {
113 u32 reg = SSI_SYS_STATUS(i * 2) + offset;
114 u32 status = rsnd_mod_read(mod, reg);
115 u32 val = 0xf << (shift * 4);
119 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
120 struct device *dev = rsnd_priv_to_dev(priv);
122 rsnd_print_irq_status(dev, "%s err status : 0x%08x\n",
123 rsnd_mod_name(mod), status);
126 rsnd_mod_write(mod, reg, val);
132 static u32 *rsnd_ssiu_get_status(struct rsnd_mod *mod,
133 struct rsnd_dai_stream *io,
134 enum rsnd_mod_type type)
136 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
137 int busif = rsnd_mod_id_sub(mod);
139 return &ssiu->busif_status[busif];
142 static int rsnd_ssiu_init(struct rsnd_mod *mod,
143 struct rsnd_dai_stream *io,
144 struct rsnd_priv *priv)
146 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
147 u32 ssis = rsnd_ssi_multi_secondaries_runtime(io);
148 int use_busif = rsnd_ssi_use_busif(io);
149 int id = rsnd_mod_id(mod);
150 int is_clk_master = rsnd_rdai_is_clk_master(rdai);
154 rsnd_ssiu_busif_err_status_clear(mod);
156 /* Gen4 doesn't have SSI_MODE */
157 if (rsnd_is_gen4(priv))
158 goto ssi_mode_setting_end;
163 rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);
166 * SSI_MODE1 / SSI_MODE2
169 * sharing/multi with SSI0 are mainly supported
171 val1 = rsnd_mod_read(mod, SSI_MODE1);
172 val2 = rsnd_mod_read(mod, SSI_MODE2);
173 if (rsnd_ssi_is_pin_sharing(io)) {
181 * set synchronized bit here
184 /* SSI4 is synchronized with SSI3 */
187 /* SSI012 are synchronized */
190 /* SSI0129 are synchronized */
195 /* SSI1 is sharing pin with SSI0 */
197 val1 |= is_clk_master ? 0x2 : 0x1;
199 /* SSI2 is sharing pin with SSI0 */
201 val1 |= is_clk_master ? 0x2 << 2 :
203 /* SSI4 is sharing pin with SSI3 */
205 val1 |= is_clk_master ? 0x2 << 16 :
207 /* SSI9 is sharing pin with SSI0 */
209 val2 |= is_clk_master ? 0x2 : 0x1;
211 rsnd_mod_bset(mod, SSI_MODE1, 0x0013001f, val1);
212 rsnd_mod_bset(mod, SSI_MODE2, 0x00000017, val2);
214 ssi_mode_setting_end:
216 * Enable busif buffer over/under run interrupt.
217 * It will be handled from ssi.c
219 * __rsnd_ssi_interrupt()
221 rsnd_ssiu_busif_err_irq_enable(mod);
226 static int rsnd_ssiu_quit(struct rsnd_mod *mod,
227 struct rsnd_dai_stream *io,
228 struct rsnd_priv *priv)
230 /* disable busif buffer over/under run interrupt. */
231 rsnd_ssiu_busif_err_irq_disable(mod);
236 static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
238 .init = rsnd_ssiu_init,
239 .quit = rsnd_ssiu_quit,
240 .get_status = rsnd_ssiu_get_status,
243 static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
244 struct rsnd_dai_stream *io,
245 struct rsnd_priv *priv)
247 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
248 u32 has_hdmi0 = rsnd_flags_has(io, RSND_STREAM_HDMI0);
249 u32 has_hdmi1 = rsnd_flags_has(io, RSND_STREAM_HDMI1);
253 ret = rsnd_ssiu_init(mod, io, priv);
260 * TDM Extend/Split Mode
262 * rsnd_ssi_config_init()
264 if (rsnd_runtime_is_tdm(io))
266 else if (rsnd_runtime_is_tdm_split(io))
269 rsnd_mod_write(mod, SSI_MODE, mode);
271 if (rsnd_ssi_use_busif(io)) {
272 int id = rsnd_mod_id(mod);
273 int busif = rsnd_mod_id_sub(mod);
274 enum rsnd_reg adinr_reg, mode_reg, dalign_reg;
276 if ((id == 9) && (busif >= 4)) {
277 adinr_reg = SSI9_BUSIF_ADINR(busif);
278 mode_reg = SSI9_BUSIF_MODE(busif);
279 dalign_reg = SSI9_BUSIF_DALIGN(busif);
281 adinr_reg = SSI_BUSIF_ADINR(busif);
282 mode_reg = SSI_BUSIF_MODE(busif);
283 dalign_reg = SSI_BUSIF_DALIGN(busif);
286 rsnd_mod_write(mod, adinr_reg,
287 rsnd_get_adinr_bit(mod, io) |
288 (rsnd_io_is_play(io) ?
289 rsnd_runtime_channel_after_ctu(io) :
290 rsnd_runtime_channel_original(io)));
291 rsnd_mod_write(mod, mode_reg,
292 rsnd_get_busif_shift(io, mod) | 1);
293 rsnd_mod_write(mod, dalign_reg,
294 rsnd_get_dalign(mod, io));
297 if (has_hdmi0 || has_hdmi1) {
298 enum rsnd_mod_type rsnd_ssi_array[] = {
303 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
304 struct rsnd_mod *pos;
308 i = rsnd_mod_id(ssi_mod);
310 /* output all same SSI as default */
317 for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) {
318 int shift = (i * 4) + 20;
320 val = (val & ~(0xF << shift)) |
321 rsnd_mod_id(pos) << shift;
325 rsnd_mod_write(mod, HDMI0_SEL, val);
327 rsnd_mod_write(mod, HDMI1_SEL, val);
333 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
334 struct rsnd_dai_stream *io,
335 struct rsnd_priv *priv)
337 int busif = rsnd_mod_id_sub(mod);
339 if (!rsnd_ssi_use_busif(io))
342 rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 1 << (busif * 4));
344 if (rsnd_ssi_multi_secondaries_runtime(io))
345 rsnd_mod_write(mod, SSI_CONTROL, 0x1);
350 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
351 struct rsnd_dai_stream *io,
352 struct rsnd_priv *priv)
354 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
355 int busif = rsnd_mod_id_sub(mod);
357 if (!rsnd_ssi_use_busif(io))
360 rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 0);
365 if (rsnd_ssi_multi_secondaries_runtime(io))
366 rsnd_mod_write(mod, SSI_CONTROL, 0);
371 static int rsnd_ssiu_id(struct rsnd_mod *mod)
373 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
375 /* see rsnd_ssiu_probe() */
379 static int rsnd_ssiu_id_sub(struct rsnd_mod *mod)
381 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod);
383 /* see rsnd_ssiu_probe() */
387 static struct dma_chan *rsnd_ssiu_dma_req(struct rsnd_dai_stream *io,
388 struct rsnd_mod *mod)
390 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
391 int is_play = rsnd_io_is_play(io);
395 * It should use "rcar_sound,ssiu" on DT.
396 * But, we need to keep compatibility for old version.
398 * If it has "rcar_sound.ssiu", it will be used.
399 * If not, "rcar_sound.ssi" will be used.
405 name = is_play ? "rx" : "tx";
407 return rsnd_dma_request_channel(rsnd_ssiu_of_node(priv),
408 SSIU_NAME, mod, name);
411 #ifdef CONFIG_DEBUG_FS
412 static void rsnd_ssiu_debug_info(struct seq_file *m,
413 struct rsnd_dai_stream *io,
414 struct rsnd_mod *mod)
416 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSIU,
417 rsnd_mod_id(mod) * 0x80, 0x80);
419 #define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info
424 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
426 .dma_req = rsnd_ssiu_dma_req,
427 .init = rsnd_ssiu_init_gen2,
428 .quit = rsnd_ssiu_quit,
429 .start = rsnd_ssiu_start_gen2,
430 .stop = rsnd_ssiu_stop_gen2,
431 .get_status = rsnd_ssiu_get_status,
435 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
437 if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
440 return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
443 static void rsnd_parse_connect_ssiu_compatible(struct rsnd_priv *priv,
444 struct rsnd_dai_stream *io)
446 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
447 struct rsnd_ssiu *ssiu;
454 is_dma_mode = rsnd_ssi_is_dma_mode(ssi_mod);
457 for_each_rsnd_ssiu(ssiu, priv, i) {
458 struct rsnd_mod *mod = rsnd_mod_get(ssiu);
461 (rsnd_mod_id(ssi_mod) == rsnd_mod_id(mod)) &&
462 (rsnd_mod_id_sub(mod) == 0)) {
463 rsnd_dai_connect(mod, io, mod->type);
469 void rsnd_parse_connect_ssiu(struct rsnd_dai *rdai,
470 struct device_node *playback,
471 struct device_node *capture)
473 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
474 struct device *dev = rsnd_priv_to_dev(priv);
475 struct device_node *node = rsnd_ssiu_of_node(priv);
476 struct rsnd_dai_stream *io_p = &rdai->playback;
477 struct rsnd_dai_stream *io_c = &rdai->capture;
479 /* use rcar_sound,ssiu if exist */
481 struct device_node *np;
484 for_each_child_of_node(node, np) {
485 struct rsnd_mod *mod;
487 i = rsnd_node_fixed_index(dev, np, SSIU_NAME, i);
493 mod = rsnd_ssiu_mod_get(priv, i);
496 rsnd_dai_connect(mod, io_p, mod->type);
498 rsnd_dai_connect(mod, io_c, mod->type);
505 /* Keep DT compatibility */
506 if (!rsnd_io_to_mod_ssiu(io_p))
507 rsnd_parse_connect_ssiu_compatible(priv, io_p);
508 if (!rsnd_io_to_mod_ssiu(io_c))
509 rsnd_parse_connect_ssiu_compatible(priv, io_c);
512 int rsnd_ssiu_probe(struct rsnd_priv *priv)
514 struct device *dev = rsnd_priv_to_dev(priv);
515 struct device_node *node;
516 struct rsnd_ssiu *ssiu;
517 struct rsnd_mod_ops *ops;
518 const int *list = NULL;
522 * Keep DT compatibility.
523 * if it has "rcar_sound,ssiu", use it.
524 * if not, use "rcar_sound,ssi"
526 * rsnd_ssiu_bufsif_to_id()
528 node = rsnd_ssiu_of_node(priv);
530 nr = rsnd_node_count(priv, node, SSIU_NAME);
537 ssiu = devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL);
544 if (rsnd_is_gen1(priv))
545 ops = &rsnd_ssiu_ops_gen1;
547 ops = &rsnd_ssiu_ops_gen2;
549 /* Keep compatibility */
552 (ops == &rsnd_ssiu_ops_gen2)) {
553 ops->id = rsnd_ssiu_id;
554 ops->id_sub = rsnd_ssiu_id_sub;
556 if (rsnd_is_gen2(priv)) {
558 nr = ARRAY_SIZE(gen2_id);
559 } else if (rsnd_is_gen3(priv)) {
561 nr = ARRAY_SIZE(gen3_id);
562 } else if (rsnd_is_gen4(priv)) {
564 nr = ARRAY_SIZE(gen4_id);
566 dev_err(dev, "unknown SSIU\n");
571 for_each_rsnd_ssiu(ssiu, priv, i) {
580 * rsnd_ssiu_get_id_sub()
582 for (j = 0; j < nr; j++) {
586 ssiu->id_sub = i - list[ssiu->id];
592 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
593 ops, NULL, RSND_MOD_SSIU, i);
601 void rsnd_ssiu_remove(struct rsnd_priv *priv)
603 struct rsnd_ssiu *ssiu;
606 for_each_rsnd_ssiu(ssiu, priv, i) {
607 rsnd_mod_quit(rsnd_mod_get(ssiu));