2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2019 Oleksandr Tymoshenko <gonzo@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/mutex.h>
41 #include <sys/resource.h>
42 #include <machine/bus.h>
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
47 #include <dev/extres/clk/clk.h>
48 #include <dev/extres/hwreset/hwreset.h>
49 #include <dev/extres/syscon/syscon.h>
51 #include "syscon_if.h"
54 #include <dev/sound/pcm/sound.h>
55 #include <dev/sound/fdt/audio_dai.h>
56 #include "audio_dai_if.h"
58 #define AUDIO_BUFFER_SIZE 48000 * 4
60 #define I2S_TXCR 0x0000
61 #define I2S_CSR_2 (0 << 15)
62 #define I2S_CSR_4 (1 << 15)
63 #define I2S_CSR_6 (2 << 15)
64 #define I2S_CSR_8 (3 << 15)
65 #define I2S_TXCR_IBM_NORMAL (0 << 9)
66 #define I2S_TXCR_IBM_LJ (1 << 9)
67 #define I2S_TXCR_IBM_RJ (2 << 9)
68 #define I2S_TXCR_PBM_NODELAY (0 << 7)
69 #define I2S_TXCR_PBM_1 (1 << 7)
70 #define I2S_TXCR_PBM_2 (2 << 7)
71 #define I2S_TXCR_PBM_3 (3 << 7)
72 #define I2S_TXCR_TFS_I2S (0 << 5)
73 #define I2S_TXCR_TFS_PCM (1 << 5)
74 #define I2S_TXCR_VDW_16 (0xf << 0)
75 #define I2S_RXCR 0x0004
76 #define I2S_RXCR_IBM_NORMAL (0 << 9)
77 #define I2S_RXCR_IBM_LJ (1 << 9)
78 #define I2S_RXCR_IBM_RJ (2 << 9)
79 #define I2S_RXCR_PBM_NODELAY (0 << 7)
80 #define I2S_RXCR_PBM_1 (1 << 7)
81 #define I2S_RXCR_PBM_2 (2 << 7)
82 #define I2S_RXCR_PBM_3 (3 << 7)
83 #define I2S_RXCR_TFS_I2S (0 << 5)
84 #define I2S_RXCR_TFS_PCM (1 << 5)
85 #define I2S_RXCR_VDW_16 (0xf << 0)
86 #define I2S_CKR 0x0008
87 #define I2S_CKR_MSS_MASK (1 << 27)
88 #define I2S_CKR_MSS_MASTER (0 << 27)
89 #define I2S_CKR_MSS_SLAVE (1 << 27)
90 #define I2S_CKR_CKP (1 << 26)
91 #define I2S_CKR_MDIV(n) (((n) - 1) << 16)
92 #define I2S_CKR_MDIV_MASK (0xff << 16)
93 #define I2S_CKR_RSD(n) (((n) - 1) << 8)
94 #define I2S_CKR_RSD_MASK (0xff << 8)
95 #define I2S_CKR_TSD(n) (((n) - 1) << 0)
96 #define I2S_CKR_TSD_MASK (0xff << 0)
97 #define I2S_TXFIFOLR 0x000c
98 #define TXFIFO0LR_MASK 0x3f
99 #define I2S_DMACR 0x0010
100 #define I2S_DMACR_RDE_ENABLE (1 << 24)
101 #define I2S_DMACR_RDL(n) ((n) << 16)
102 #define I2S_DMACR_TDE_ENABLE (1 << 8)
103 #define I2S_DMACR_TDL(n) ((n) << 0)
104 #define I2S_INTCR 0x0014
105 #define I2S_INTCR_RFT(n) (((n) - 1) << 20)
106 #define I2S_INTCR_TFT(n) (((n) - 1) << 4)
107 #define I2S_INTCR_RXFIE (1 << 16)
108 #define I2S_INTCR_TXUIC (1 << 2)
109 #define I2S_INTCR_TXEIE (1 << 0)
110 #define I2S_INTSR 0x0018
111 #define I2S_INTSR_RXFI (1 << 16)
112 #define I2S_INTSR_TXUI (1 << 1)
113 #define I2S_INTSR_TXEI (1 << 0)
114 #define I2S_XFER 0x001c
115 #define I2S_XFER_RXS_START (1 << 1)
116 #define I2S_XFER_TXS_START (1 << 0)
117 #define I2S_CLR 0x0020
118 #define I2S_CLR_RXC (1 << 1)
119 #define I2S_CLR_TXC (1 << 0)
120 #define I2S_TXDR 0x0024
121 #define I2S_RXDR 0x0028
122 #define I2S_RXFIFOLR 0x002c
123 #define RXFIFO0LR_MASK 0x3f
126 #define GRF_SOC_CON8 0xe220
127 #define I2S_IO_DIRECTION_MASK 7
128 #define I2S_IO_DIRECTION_SHIFT 11
129 #define I2S_IO_8CH_OUT_2CH_IN 0
130 #define I2S_IO_6CH_OUT_4CH_IN 4
131 #define I2S_IO_4CH_OUT_6CH_IN 6
132 #define I2S_IO_2CH_OUT_8CH_IN 7
134 #define DIV_ROUND_CLOSEST(n,d) (((n) + (d) / 2) / (d))
136 #define RK_I2S_SAMPLING_RATE 48000
139 static struct ofw_compat_data compat_data[] = {
140 { "rockchip,rk3066-i2s", 1 },
141 { "rockchip,rk3399-i2s", 1 },
145 static struct resource_spec rk_i2s_spec[] = {
146 { SYS_RES_MEMORY, 0, RF_ACTIVE },
147 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
151 struct rk_i2s_softc {
153 struct resource *res[2];
159 /* pointers to playback/capture buffers */
164 #define RK_I2S_LOCK(sc) mtx_lock(&(sc)->mtx)
165 #define RK_I2S_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
166 #define RK_I2S_READ_4(sc, reg) bus_read_4((sc)->res[0], (reg))
167 #define RK_I2S_WRITE_4(sc, reg, val) bus_write_4((sc)->res[0], (reg), (val))
169 static int rk_i2s_probe(device_t dev);
170 static int rk_i2s_attach(device_t dev);
171 static int rk_i2s_detach(device_t dev);
173 static uint32_t sc_fmt[] = {
174 SND_FORMAT(AFMT_S16_LE, 2, 0),
177 static struct pcmchan_caps rk_i2s_caps = {RK_I2S_SAMPLING_RATE, RK_I2S_SAMPLING_RATE, sc_fmt, 0};
181 rk_i2s_init(struct rk_i2s_softc *sc)
186 clk_set_freq(sc->clk, RK_I2S_SAMPLING_RATE * 256,
188 error = clk_enable(sc->clk);
190 device_printf(sc->dev, "cannot enable i2s_clk clock\n");
194 val = I2S_INTCR_TFT(FIFO_SIZE/2);
195 val |= I2S_INTCR_RFT(FIFO_SIZE/2);
196 RK_I2S_WRITE_4(sc, I2S_INTCR, val);
198 if (sc->grf && ofw_bus_is_compatible(sc->dev, "rockchip,rk3399-i2s")) {
199 val = (I2S_IO_2CH_OUT_8CH_IN << I2S_IO_DIRECTION_SHIFT);
200 val |= (I2S_IO_DIRECTION_MASK << I2S_IO_DIRECTION_SHIFT) << 16;
201 SYSCON_WRITE_4(sc->grf, GRF_SOC_CON8, val);
204 // HACK: enable IO domain
206 val |= (1 << 1) << 16;
207 SYSCON_WRITE_4(sc->grf, 0xe640, val);
211 RK_I2S_WRITE_4(sc, I2S_XFER, 0);
217 rk_i2s_probe(device_t dev)
219 if (!ofw_bus_status_okay(dev))
222 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
225 device_set_desc(dev, "Rockchip I2S");
226 return (BUS_PROBE_DEFAULT);
230 rk_i2s_attach(device_t dev)
232 struct rk_i2s_softc *sc;
236 sc = device_get_softc(dev);
239 mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF);
241 if (bus_alloc_resources(dev, rk_i2s_spec, sc->res) != 0) {
242 device_printf(dev, "cannot allocate resources for device\n");
247 error = clk_get_by_ofw_name(dev, 0, "i2s_hclk", &sc->hclk);
249 device_printf(dev, "cannot get i2s_hclk clock\n");
253 error = clk_get_by_ofw_name(dev, 0, "i2s_clk", &sc->clk);
255 device_printf(dev, "cannot get i2s_clk clock\n");
259 /* Activate the module clock. */
260 error = clk_enable(sc->hclk);
262 device_printf(dev, "cannot enable i2s_hclk clock\n");
266 node = ofw_bus_get_node(dev);
267 if (OF_hasprop(node, "rockchip,grf") &&
268 syscon_get_by_ofw_property(dev, node,
269 "rockchip,grf", &sc->grf) != 0) {
270 device_printf(dev, "cannot get grf driver handle\n");
276 OF_device_register_xref(OF_xref_from_node(node), dev);
286 rk_i2s_detach(device_t dev)
288 struct rk_i2s_softc *i2s;
290 i2s = device_get_softc(dev);
292 if (i2s->hclk != NULL)
293 clk_release(i2s->hclk);
295 clk_release(i2s->clk);
297 if (i2s->intrhand != NULL)
298 bus_teardown_intr(i2s->dev, i2s->res[1], i2s->intrhand);
300 bus_release_resources(dev, rk_i2s_spec, i2s->res);
301 mtx_destroy(&i2s->mtx);
307 rk_i2s_dai_init(device_t dev, uint32_t format)
309 uint32_t val, txcr, rxcr;
310 struct rk_i2s_softc *sc;
313 sc = device_get_softc(dev);
315 fmt = AUDIO_DAI_FORMAT_FORMAT(format);
316 pol = AUDIO_DAI_FORMAT_POLARITY(format);
317 clk = AUDIO_DAI_FORMAT_CLOCK(format);
320 val = RK_I2S_READ_4(sc, I2S_CKR);
322 val &= ~(I2S_CKR_MSS_MASK);
324 case AUDIO_DAI_CLOCK_CBM_CFM:
325 val |= I2S_CKR_MSS_MASTER;
327 case AUDIO_DAI_CLOCK_CBS_CFS:
328 val |= I2S_CKR_MSS_SLAVE;
335 case AUDIO_DAI_POLARITY_IB_NF:
338 case AUDIO_DAI_POLARITY_NB_NF:
345 RK_I2S_WRITE_4(sc, I2S_CKR, val);
347 txcr = I2S_TXCR_VDW_16 | I2S_CSR_2;
348 rxcr = I2S_RXCR_VDW_16 | I2S_CSR_2;
351 case AUDIO_DAI_FORMAT_I2S:
352 txcr |= I2S_TXCR_IBM_NORMAL;
353 rxcr |= I2S_RXCR_IBM_NORMAL;
355 case AUDIO_DAI_FORMAT_LJ:
356 txcr |= I2S_TXCR_IBM_LJ;
357 rxcr |= I2S_RXCR_IBM_LJ;
359 case AUDIO_DAI_FORMAT_RJ:
360 txcr |= I2S_TXCR_IBM_RJ;
361 rxcr |= I2S_RXCR_IBM_RJ;
363 case AUDIO_DAI_FORMAT_DSPA:
364 txcr |= I2S_TXCR_TFS_PCM;
365 rxcr |= I2S_RXCR_TFS_PCM;
366 txcr |= I2S_TXCR_PBM_1;
367 rxcr |= I2S_RXCR_PBM_1;
369 case AUDIO_DAI_FORMAT_DSPB:
370 txcr |= I2S_TXCR_TFS_PCM;
371 rxcr |= I2S_RXCR_TFS_PCM;
372 txcr |= I2S_TXCR_PBM_2;
373 rxcr |= I2S_RXCR_PBM_2;
379 RK_I2S_WRITE_4(sc, I2S_TXCR, txcr);
380 RK_I2S_WRITE_4(sc, I2S_RXCR, rxcr);
382 RK_I2S_WRITE_4(sc, I2S_XFER, 0);
389 rk_i2s_dai_intr(device_t dev, struct snd_dbuf *play_buf, struct snd_dbuf *rec_buf)
391 struct rk_i2s_softc *sc;
397 sc = device_get_softc(dev);
400 status = RK_I2S_READ_4(sc, I2S_INTSR);
402 if (status & I2S_INTSR_TXEI) {
403 level = RK_I2S_READ_4(sc, I2S_TXFIFOLR) & TXFIFO0LR_MASK;
405 uint32_t count, size, readyptr, written;
406 count = sndbuf_getready(play_buf);
407 if (count > FIFO_SIZE - 1)
408 count = FIFO_SIZE - 1;
409 size = sndbuf_getsize(play_buf);
410 readyptr = sndbuf_getreadyptr(play_buf);
412 samples = (uint8_t*)sndbuf_getbuf(play_buf);
414 for (; level < count; level++) {
415 val = (samples[readyptr++ % size] << 0);
416 val |= (samples[readyptr++ % size] << 8);
417 val |= (samples[readyptr++ % size] << 16);
418 val |= (samples[readyptr++ % size] << 24);
420 RK_I2S_WRITE_4(sc, I2S_TXDR, val);
422 sc->play_ptr += written;
423 sc->play_ptr %= size;
424 ret |= AUDIO_DAI_PLAY_INTR;
427 if (status & I2S_INTSR_RXFI) {
428 level = RK_I2S_READ_4(sc, I2S_RXFIFOLR) & RXFIFO0LR_MASK;
430 uint32_t count, size, freeptr, recorded;
431 count = sndbuf_getfree(rec_buf);
432 size = sndbuf_getsize(rec_buf);
433 freeptr = sndbuf_getfreeptr(rec_buf);
434 samples = (uint8_t*)sndbuf_getbuf(rec_buf);
436 if (level > count / 4)
439 for (; level > 0; level--) {
440 val = RK_I2S_READ_4(sc, I2S_RXDR);
441 samples[freeptr++ % size] = val & 0xff;
442 samples[freeptr++ % size] = (val >> 8) & 0xff;
443 samples[freeptr++ % size] = (val >> 16) & 0xff;
444 samples[freeptr++ % size] = (val >> 24) & 0xff;
447 sc->rec_ptr += recorded;
449 ret |= AUDIO_DAI_REC_INTR;
457 static struct pcmchan_caps *
458 rk_i2s_dai_get_caps(device_t dev)
460 return (&rk_i2s_caps);
464 rk_i2s_dai_trigger(device_t dev, int go, int pcm_dir)
466 struct rk_i2s_softc *sc = device_get_softc(dev);
470 if ((pcm_dir != PCMDIR_PLAY) && (pcm_dir != PCMDIR_REC))
475 val = RK_I2S_READ_4(sc, I2S_INTCR);
476 if (pcm_dir == PCMDIR_PLAY)
477 val |= I2S_INTCR_TXEIE;
478 else if (pcm_dir == PCMDIR_REC)
479 val |= I2S_INTCR_RXFIE;
480 RK_I2S_WRITE_4(sc, I2S_INTCR, val);
482 val = I2S_XFER_TXS_START | I2S_XFER_RXS_START;
483 RK_I2S_WRITE_4(sc, I2S_XFER, val);
488 val = RK_I2S_READ_4(sc, I2S_INTCR);
489 if (pcm_dir == PCMDIR_PLAY)
490 val &= ~I2S_INTCR_TXEIE;
491 else if (pcm_dir == PCMDIR_REC)
492 val &= ~I2S_INTCR_RXFIE;
493 RK_I2S_WRITE_4(sc, I2S_INTCR, val);
496 * If there is no other activity going on, stop transfers
498 if ((val & (I2S_INTCR_TXEIE | I2S_INTCR_RXFIE)) == 0) {
499 RK_I2S_WRITE_4(sc, I2S_XFER, 0);
501 if (pcm_dir == PCMDIR_PLAY)
502 clear_bit = I2S_CLR_TXC;
503 else if (pcm_dir == PCMDIR_REC)
504 clear_bit = I2S_CLR_RXC;
508 val = RK_I2S_READ_4(sc, I2S_CLR);
510 RK_I2S_WRITE_4(sc, I2S_CLR, val);
512 while ((RK_I2S_READ_4(sc, I2S_CLR) & clear_bit) != 0)
517 if (pcm_dir == PCMDIR_PLAY)
529 rk_i2s_dai_get_ptr(device_t dev, int pcm_dir)
531 struct rk_i2s_softc *sc;
534 sc = device_get_softc(dev);
537 if (pcm_dir == PCMDIR_PLAY)
547 rk_i2s_dai_setup_intr(device_t dev, driver_intr_t intr_handler, void *intr_arg)
549 struct rk_i2s_softc *sc = device_get_softc(dev);
551 if (bus_setup_intr(dev, sc->res[1],
552 INTR_TYPE_MISC | INTR_MPSAFE, NULL, intr_handler, intr_arg,
554 device_printf(dev, "cannot setup interrupt handler\n");
562 rk_i2s_dai_set_chanformat(device_t dev, uint32_t format)
569 rk_i2s_dai_set_sysclk(device_t dev, unsigned int rate, int dai_dir)
571 struct rk_i2s_softc *sc;
574 sc = device_get_softc(dev);
575 error = clk_disable(sc->clk);
577 device_printf(sc->dev, "could not disable i2s_clk clock\n");
581 error = clk_set_freq(sc->clk, rate, CLK_SET_ROUND_DOWN);
583 device_printf(sc->dev, "could not set i2s_clk freq\n");
585 error = clk_enable(sc->clk);
587 device_printf(sc->dev, "could not enable i2s_clk clock\n");
595 rk_i2s_dai_set_chanspeed(device_t dev, uint32_t speed)
597 struct rk_i2s_softc *sc;
600 uint32_t bus_clock_div, lr_clock_div;
601 uint64_t bus_clk_freq;
604 sc = device_get_softc(dev);
607 val = RK_I2S_READ_4(sc, I2S_CKR);
609 if ((val & I2S_CKR_MSS_SLAVE) == 0) {
610 error = clk_get_freq(sc->clk, &clk_freq);
612 device_printf(sc->dev, "failed to get clk frequency: err=%d\n", error);
615 bus_clk_freq = 2 * 32 * speed;
616 bus_clock_div = DIV_ROUND_CLOSEST(clk_freq, bus_clk_freq);
617 lr_clock_div = bus_clk_freq / speed;
619 val &= ~(I2S_CKR_MDIV_MASK | I2S_CKR_RSD_MASK | I2S_CKR_TSD_MASK);
620 val |= I2S_CKR_MDIV(bus_clock_div);
621 val |= I2S_CKR_RSD(lr_clock_div);
622 val |= I2S_CKR_TSD(lr_clock_div);
624 RK_I2S_WRITE_4(sc, I2S_CKR, val);
630 static device_method_t rk_i2s_methods[] = {
631 /* Device interface */
632 DEVMETHOD(device_probe, rk_i2s_probe),
633 DEVMETHOD(device_attach, rk_i2s_attach),
634 DEVMETHOD(device_detach, rk_i2s_detach),
636 DEVMETHOD(audio_dai_init, rk_i2s_dai_init),
637 DEVMETHOD(audio_dai_setup_intr, rk_i2s_dai_setup_intr),
638 DEVMETHOD(audio_dai_set_sysclk, rk_i2s_dai_set_sysclk),
639 DEVMETHOD(audio_dai_set_chanspeed, rk_i2s_dai_set_chanspeed),
640 DEVMETHOD(audio_dai_set_chanformat, rk_i2s_dai_set_chanformat),
641 DEVMETHOD(audio_dai_intr, rk_i2s_dai_intr),
642 DEVMETHOD(audio_dai_get_caps, rk_i2s_dai_get_caps),
643 DEVMETHOD(audio_dai_trigger, rk_i2s_dai_trigger),
644 DEVMETHOD(audio_dai_get_ptr, rk_i2s_dai_get_ptr),
649 static driver_t rk_i2s_driver = {
652 sizeof(struct rk_i2s_softc),
655 DRIVER_MODULE(rk_i2s, simplebus, rk_i2s_driver, 0, 0);
656 SIMPLEBUS_PNP_INFO(compat_data);