imx6_ssi.c revision 299069
11558Srgrimes/*- 2187814Srwatson * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com> 3187814Srwatson * All rights reserved. 4187814Srwatson * 5187814Srwatson * Redistribution and use in source and binary forms, with or without 6187814Srwatson * modification, are permitted provided that the following conditions 7187814Srwatson * are met: 898542Smckusick * 1. Redistributions of source code must retain the above copyright 998542Smckusick * notice, this list of conditions and the following disclaimer. 1098542Smckusick * 2. Redistributions in binary form must reproduce the above copyright 1198542Smckusick * notice, this list of conditions and the following disclaimer in the 1298542Smckusick * documentation and/or other materials provided with the distribution. 1398542Smckusick * 1498542Smckusick * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15110884Smckusick * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1698542Smckusick * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 171558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 181558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 191558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 201558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 211558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 221558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 231558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 241558Srgrimes * SUCH DAMAGE. 251558Srgrimes */ 261558Srgrimes 271558Srgrimes/* 281558Srgrimes * i.MX6 Synchronous Serial Interface (SSI) 291558Srgrimes * 301558Srgrimes * Chapter 61, i.MX 6Dual/6Quad Applications Processor Reference Manual, 311558Srgrimes * Rev. 1, 04/2013 321558Srgrimes */ 331558Srgrimes 341558Srgrimes#include <sys/cdefs.h> 351558Srgrimes__FBSDID("$FreeBSD: head/sys/arm/freescale/imx/imx6_ssi.c 299069 2016-05-04 15:48:59Z pfg $"); 361558Srgrimes 371558Srgrimes#include <sys/param.h> 381558Srgrimes#include <sys/systm.h> 391558Srgrimes#include <sys/bus.h> 401558Srgrimes#include <sys/kernel.h> 411558Srgrimes#include <sys/module.h> 421558Srgrimes#include <sys/malloc.h> 431558Srgrimes#include <sys/rman.h> 441558Srgrimes#include <sys/timeet.h> 451558Srgrimes#include <sys/timetc.h> 4636998Scharnier 471558Srgrimes#include <dev/sound/pcm/sound.h> 481558Srgrimes#include <dev/sound/chip.h> 491558Srgrimes#include <mixer_if.h> 501558Srgrimes 511558Srgrimes#include <dev/fdt/fdt_common.h> 5236998Scharnier#include <dev/ofw/openfirm.h> 5323673Speter#include <dev/ofw/ofw_bus.h> 5436998Scharnier#include <dev/ofw/ofw_bus_subr.h> 5536998Scharnier 5650476Speter#include <machine/bus.h> 571558Srgrimes#include <machine/cpu.h> 581558Srgrimes#include <machine/intr.h> 591558Srgrimes 601558Srgrimes#include <arm/freescale/imx/imx6_sdma.h> 6196478Sphk#include <arm/freescale/imx/imx6_anatopvar.h> 621558Srgrimes#include <arm/freescale/imx/imx_ccmvar.h> 6398542Smckusick 641558Srgrimes#define READ4(_sc, _reg) \ 651558Srgrimes bus_space_read_4(_sc->bst, _sc->bsh, _reg) 6623673Speter#define WRITE4(_sc, _reg, _val) \ 67105741Sjmallett bus_space_write_4(_sc->bst, _sc->bsh, _reg, _val) 681558Srgrimes 691558Srgrimes#define SSI_NCHANNELS 1 7099826Sjmallett 71224025Sdelphij/* i.MX6 SSI registers */ 72109525Sjmallett 731558Srgrimes#define SSI_STX0 0x00 /* Transmit Data Register n */ 741558Srgrimes#define SSI_STX1 0x04 /* Transmit Data Register n */ 7523673Speter#define SSI_SRX0 0x08 /* Receive Data Register n */ 761558Srgrimes#define SSI_SRX1 0x0C /* Receive Data Register n */ 7799826Sjmallett#define SSI_SCR 0x10 /* Control Register */ 78109510Sjmallett#define SCR_I2S_MODE_S 5 /* I2S Mode Select. */ 791558Srgrimes#define SCR_I2S_MODE_M 0x3 80227081Sed#define SCR_SYN (1 << 4) 811558Srgrimes#define SCR_NET (1 << 3) /* Network mode */ 82228458Sed#define SCR_RE (1 << 2) /* Receive Enable. */ 83228458Sed#define SCR_TE (1 << 1) /* Transmit Enable. */ 84228458Sed#define SCR_SSIEN (1 << 0) /* SSI Enable */ 85228458Sed#define SSI_SISR 0x14 /* Interrupt Status Register */ 86228458Sed#define SSI_SIER 0x18 /* Interrupt Enable Register */ 87228458Sed#define SIER_RDMAE (1 << 22) /* Receive DMA Enable. */ 88228458Sed#define SIER_RIE (1 << 21) /* Receive Interrupt Enable. */ 89228458Sed#define SIER_TDMAE (1 << 20) /* Transmit DMA Enable. */ 90228458Sed#define SIER_TIE (1 << 19) /* Transmit Interrupt Enable. */ 91228458Sed#define SIER_TDE0IE (1 << 12) /* Transmit Data Register Empty 0. */ 921558Srgrimes#define SIER_TUE0IE (1 << 8) /* Transmitter Underrun Error 0. */ 931558Srgrimes#define SIER_TFE0IE (1 << 0) /* Transmit FIFO Empty 0 IE. */ 9492839Simp#define SSI_STCR 0x1C /* Transmit Configuration Register */ 951558Srgrimes#define STCR_TXBIT0 (1 << 9) /* Transmit Bit 0 shift MSB/LSB */ 96109525Sjmallett#define STCR_TFEN1 (1 << 8) /* Transmit FIFO Enable 1. */ 97224004Sdelphij#define STCR_TFEN0 (1 << 7) /* Transmit FIFO Enable 0. */ 981558Srgrimes#define STCR_TFDIR (1 << 6) /* Transmit Frame Direction. */ 99224004Sdelphij#define STCR_TXDIR (1 << 5) /* Transmit Clock Direction. */ 100109507Sjmallett#define STCR_TSHFD (1 << 4) /* Transmit Shift Direction. */ 101224004Sdelphij#define STCR_TSCKP (1 << 3) /* Transmit Clock Polarity. */ 102109525Sjmallett#define STCR_TFSI (1 << 2) /* Transmit Frame Sync Invert. */ 103187814Srwatson#define STCR_TFSL (1 << 1) /* Transmit Frame Sync Length. */ 104187814Srwatson#define STCR_TEFS (1 << 0) /* Transmit Early Frame Sync. */ 105187814Srwatson#define SSI_SRCR 0x20 /* Receive Configuration Register */ 106109525Sjmallett#define SSI_STCCR 0x24 /* Transmit Clock Control Register */ 107109525Sjmallett#define STCCR_DIV2 (1 << 18) /* Divide By 2. */ 108109525Sjmallett#define STCCR_PSR (1 << 17) /* Divide clock by 8. */ 109224004Sdelphij#define WL3_WL0_S 13 110224004Sdelphij#define WL3_WL0_M 0xf 111224004Sdelphij#define DC4_DC0_S 8 112109525Sjmallett#define DC4_DC0_M 0x1f 113109525Sjmallett#define PM7_PM0_S 0 114109525Sjmallett#define PM7_PM0_M 0xff 115109525Sjmallett#define SSI_SRCCR 0x28 /* Receive Clock Control Register */ 116109525Sjmallett#define SSI_SFCSR 0x2C /* FIFO Control/Status Register */ 1171558Srgrimes#define SFCSR_RFWM1_S 20 /* Receive FIFO Empty WaterMark 1 */ 1181558Srgrimes#define SFCSR_RFWM1_M 0xf 1191558Srgrimes#define SFCSR_TFWM1_S 16 /* Transmit FIFO Empty WaterMark 1 */ 1201558Srgrimes#define SFCSR_TFWM1_M 0xf 1211558Srgrimes#define SFCSR_RFWM0_S 4 /* Receive FIFO Empty WaterMark 0 */ 122187814Srwatson#define SFCSR_RFWM0_M 0xf 123187814Srwatson#define SFCSR_TFWM0_S 0 /* Transmit FIFO Empty WaterMark 0 */ 124187814Srwatson#define SFCSR_TFWM0_M 0xf 125187814Srwatson#define SSI_SACNT 0x38 /* AC97 Control Register */ 1261558Srgrimes#define SSI_SACADD 0x3C /* AC97 Command Address Register */ 127109525Sjmallett#define SSI_SACDAT 0x40 /* AC97 Command Data Register */ 128109525Sjmallett#define SSI_SATAG 0x44 /* AC97 Tag Register */ 129109525Sjmallett#define SSI_STMSK 0x48 /* Transmit Time Slot Mask Register */ 130109525Sjmallett#define SSI_SRMSK 0x4C /* Receive Time Slot Mask Register */ 131109525Sjmallett#define SSI_SACCST 0x50 /* AC97 Channel Status Register */ 132109525Sjmallett#define SSI_SACCEN 0x54 /* AC97 Channel Enable Register */ 133187814Srwatson#define SSI_SACCDIS 0x58 /* AC97 Channel Disable Register */ 134187814Srwatson 135187814Srwatsonstatic MALLOC_DEFINE(M_SSI, "ssi", "ssi audio"); 136109525Sjmallett 137224004Sdelphijuint32_t ssi_dma_intr(void *arg, int chn); 138224004Sdelphij 139109525Sjmallettstruct ssi_rate { 140109525Sjmallett uint32_t speed; 141109525Sjmallett uint32_t mfi; /* PLL4 Multiplication Factor Integer */ 142109525Sjmallett uint32_t mfn; /* PLL4 Multiplication Factor Numerator */ 1431558Srgrimes uint32_t mfd; /* PLL4 Multiplication Factor Denominator */ 1441558Srgrimes /* More dividers to configure can be added here */ 1451558Srgrimes}; 146228458Sed 147224004Sdelphijstatic struct ssi_rate rate_map[] = { 148224004Sdelphij { 192000, 49, 152, 1000 }, /* PLL4 49.152 Mhz */ 149224004Sdelphij /* TODO: add more frequences */ 150224025Sdelphij { 0, 0 }, 151224004Sdelphij}; 152224004Sdelphij 153224004Sdelphij/* 154228458Sed * i.MX6 example bit clock formula 15592839Simp * 1561558Srgrimes * BCLK = 2 channels * 192000 hz * 24 bit = 9216000 hz = 157109532Sjmallett * (24000000 * (49 + 152/1000.0) / 4 / 4 / 2 / 2 / 2 / 1 / 1) 15898542Smckusick * ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ 159109767Snjl * | | | | | | | | | | | 16099827Sjmallett * Fref ------/ | | | | | | | | | | 1611558Srgrimes * PLL4 div select -/ | | | | | | | | | 162101688Sjmallett * PLL4 num --------------/ | | | | | | | | 163101688Sjmallett * PLL4 denom -------------------/ | | | | | | | 16498542Smckusick * PLL4 post div ---------------------/ | | | | | | 165109532Sjmallett * CCM ssi pre div (CCM_CS1CDR) ----------/ | | | | | 16698542Smckusick * CCM ssi post div (CCM_CS1CDR) -------------/ | | | | 167109532Sjmallett * SSI PM7_PM0_S ---------------------------------/ | | | 168283899Sae * SSI Fixed divider ---------------------------------/ | | 169122670Sjohan * SSI DIV2 ----------------------------------------------/ | 170122670Sjohan * SSI PSR (prescaler /1 or /8) ------------------------------/ 171122670Sjohan * 172101688Sjmallett * MCLK (Master clock) depends on DAC, usually BCLK * 4 173101688Sjmallett */ 17498542Smckusick 175109532Sjmallettstruct sc_info { 17698542Smckusick struct resource *res[2]; 177109532Sjmallett bus_space_tag_t bst; 178201647Sgavin bus_space_handle_t bsh; 179122670Sjohan device_t dev; 180122670Sjohan struct mtx *lock; 181101688Sjmallett void *ih; 182101688Sjmallett int pos; 183109532Sjmallett int dma_size; 18498542Smckusick bus_dma_tag_t dma_tag; 1851558Srgrimes bus_dmamap_t dma_map; 1861558Srgrimes bus_addr_t buf_base_phys; 1871558Srgrimes uint32_t *buf_base; 1881558Srgrimes struct sdma_conf *conf; 1891558Srgrimes struct ssi_rate *sr; 1901558Srgrimes struct sdma_softc *sdma_sc; 19198542Smckusick int sdma_ev_rx; 1921558Srgrimes int sdma_ev_tx; 19398542Smckusick int sdma_channel; 194101688Sjmallett}; 195101688Sjmallett 19698542Smckusick/* Channel registers */ 19798542Smckusickstruct sc_chinfo { 19898542Smckusick struct snd_dbuf *buffer; 199122670Sjohan struct pcm_channel *channel; 200250708Smckusick struct sc_pcminfo *parent; 201122670Sjohan 202250708Smckusick /* Channel information */ 203122670Sjohan uint32_t dir; 204163844Spjd uint32_t format; 205163844Spjd 206163844Spjd /* Flags */ 207122670Sjohan uint32_t run; 208250708Smckusick}; 209122670Sjohan 210109532Sjmallett/* PCM device private data */ 211109532Sjmallettstruct sc_pcminfo { 212109532Sjmallett device_t dev; 213101688Sjmallett uint32_t (*ih)(struct sc_pcminfo *scp); 214101688Sjmallett uint32_t chnum; 21598542Smckusick struct sc_chinfo chan[SSI_NCHANNELS]; 21698542Smckusick struct sc_info *sc; 21798542Smckusick}; 21898542Smckusick 21998542Smckusickstatic struct resource_spec ssi_spec[] = { 22098542Smckusick { SYS_RES_MEMORY, 0, RF_ACTIVE }, 22198542Smckusick { SYS_RES_IRQ, 0, RF_ACTIVE }, 22298542Smckusick { -1, 0 } 223122670Sjohan}; 22498542Smckusick 225122670Sjohanstatic int setup_dma(struct sc_pcminfo *scp); 22698542Smckusickstatic void setup_ssi(struct sc_info *); 22798542Smckusickstatic void ssi_configure_clock(struct sc_info *); 22898542Smckusick 22998542Smckusick/* 23098542Smckusick * Mixer interface. 23198542Smckusick */ 23298542Smckusick 23398542Smckusickstatic int 23498542Smckusickssimixer_init(struct snd_mixer *m) 23598542Smckusick{ 236101688Sjmallett struct sc_pcminfo *scp; 237101688Sjmallett struct sc_info *sc; 238109532Sjmallett int mask; 23998542Smckusick 2401558Srgrimes scp = mix_getdevinfo(m); 2411558Srgrimes sc = scp->sc; 2422154Sdg 2432154Sdg if (sc == NULL) 244248623Smckusick return -1; 245248623Smckusick 24648875Smpp mask = SOUND_MASK_PCM; 247109767Snjl mask |= SOUND_MASK_VOLUME; 248109767Snjl 249109767Snjl snd_mtxlock(sc->lock); 250109767Snjl pcm_setflags(scp->dev, pcm_getflags(scp->dev) | SD_F_SOFTPCMVOL); 251109767Snjl mix_setdevs(m, mask); 25248875Smpp snd_mtxunlock(sc->lock); 253109767Snjl 254109767Snjl return (0); 255109767Snjl} 256207141Sjeff 257109767Snjlstatic int 258109767Snjlssimixer_set(struct snd_mixer *m, unsigned dev, 259109767Snjl unsigned left, unsigned right) 260109767Snjl{ 261109767Snjl struct sc_pcminfo *scp; 262109767Snjl 263109767Snjl scp = mix_getdevinfo(m); 264109767Snjl 265163844Spjd /* Here we can configure hardware volume on our DAC */ 266163844Spjd 267109767Snjl#if 1 268109767Snjl device_printf(scp->dev, "ssimixer_set() %d %d\n", 269200796Strasz left, right); 270200796Strasz#endif 271216798Skib 272216798Skib return (0); 273109767Snjl} 274200796Strasz 275216798Skibstatic kobj_method_t ssimixer_methods[] = { 276109767Snjl KOBJMETHOD(mixer_init, ssimixer_init), 277109767Snjl KOBJMETHOD(mixer_set, ssimixer_set), 27848875Smpp KOBJMETHOD_END 279110174Sgordon}; 280242379StraszMIXER_DECLARE(ssimixer); 281242379Strasz 282242379Strasz 2831558Srgrimes/* 28471073Siedowse * Channel interface. 285101688Sjmallett */ 28698542Smckusick 2871558Srgrimesstatic void * 2881558Srgrimesssichan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, 2891558Srgrimes struct pcm_channel *c, int dir) 2901558Srgrimes{ 2911558Srgrimes struct sc_pcminfo *scp; 2921558Srgrimes struct sc_chinfo *ch; 2931558Srgrimes struct sc_info *sc; 2941558Srgrimes 29598542Smckusick scp = (struct sc_pcminfo *)devinfo; 296101688Sjmallett sc = scp->sc; 29798542Smckusick 29898542Smckusick snd_mtxlock(sc->lock); 29998542Smckusick ch = &scp->chan[0]; 300109532Sjmallett ch->dir = dir; 301109532Sjmallett ch->run = 0; 3021558Srgrimes ch->buffer = b; 303109519Sjmallett ch->channel = c; 304109519Sjmallett ch->parent = scp; 3051558Srgrimes snd_mtxunlock(sc->lock); 306109519Sjmallett 3071558Srgrimes if (sndbuf_setup(ch->buffer, sc->buf_base, sc->dma_size) != 0) { 3081558Srgrimes device_printf(scp->dev, "Can't setup sndbuf.\n"); 309109525Sjmallett return NULL; 3101558Srgrimes } 31199827Sjmallett 3121558Srgrimes return ch; 313228458Sed} 314109519Sjmallett 3151558Srgrimesstatic int 316109532Sjmallettssichan_free(kobj_t obj, void *data) 3171558Srgrimes{ 3181558Srgrimes struct sc_chinfo *ch = data; 3191558Srgrimes struct sc_pcminfo *scp = ch->parent; 320109519Sjmallett struct sc_info *sc = scp->sc; 321109519Sjmallett 322101688Sjmallett#if 0 323101688Sjmallett device_printf(scp->dev, "ssichan_free()\n"); 324109532Sjmallett#endif 325122670Sjohan 326122670Sjohan snd_mtxlock(sc->lock); 327163844Spjd /* TODO: free channel buffer */ 328163844Spjd snd_mtxunlock(sc->lock); 329163844Spjd 330101688Sjmallett return (0); 331101688Sjmallett} 332109532Sjmallett 333122670Sjohanstatic int 334122670Sjohanssichan_setformat(kobj_t obj, void *data, uint32_t format) 33598542Smckusick{ 33698542Smckusick struct sc_chinfo *ch = data; 33798542Smckusick 338101688Sjmallett ch->format = format; 339101688Sjmallett 340101688Sjmallett return (0); 34198542Smckusick} 3421558Srgrimes 3431558Srgrimesstatic uint32_t 3441558Srgrimesssichan_setspeed(kobj_t obj, void *data, uint32_t speed) 3451558Srgrimes{ 3461558Srgrimes struct sc_pcminfo *scp; 3471558Srgrimes struct sc_chinfo *ch; 3481558Srgrimes struct ssi_rate *sr; 3491558Srgrimes struct sc_info *sc; 3501558Srgrimes int threshold; 3511558Srgrimes int i; 3521558Srgrimes 3531558Srgrimes ch = data; 3541558Srgrimes scp = ch->parent; 3551558Srgrimes sc = scp->sc; 3561558Srgrimes 3571558Srgrimes sr = NULL; 3581558Srgrimes 3591558Srgrimes /* First look for equal frequency. */ 3601558Srgrimes for (i = 0; rate_map[i].speed != 0; i++) { 3611558Srgrimes if (rate_map[i].speed == speed) 3621558Srgrimes sr = &rate_map[i]; 3631558Srgrimes } 3641558Srgrimes 3651558Srgrimes /* If no match, just find nearest. */ 3661558Srgrimes if (sr == NULL) { 36798542Smckusick for (i = 0; rate_map[i].speed != 0; i++) { 3681558Srgrimes sr = &rate_map[i]; 36998542Smckusick threshold = sr->speed + ((rate_map[i + 1].speed != 0) ? 3701558Srgrimes ((rate_map[i + 1].speed - sr->speed) >> 1) : 0); 3711558Srgrimes if (speed < threshold) 37299827Sjmallett break; 3731558Srgrimes } 374228458Sed } 375187814Srwatson 376187814Srwatson sc->sr = sr; 377187814Srwatson 378187814Srwatson ssi_configure_clock(sc); 379187814Srwatson 380187814Srwatson return (sr->speed); 381187814Srwatson} 382187814Srwatson 383187814Srwatsonstatic void 384187814Srwatsonssi_configure_clock(struct sc_info *sc) 385187814Srwatson{ 386187814Srwatson struct ssi_rate *sr; 387187814Srwatson 388187814Srwatson sr = sc->sr; 389187814Srwatson 390228458Sed pll4_configure_output(sr->mfi, sr->mfn, sr->mfd); 391187814Srwatson 392187814Srwatson /* Configure other dividers here, if any */ 393187814Srwatson} 394187814Srwatson 395187814Srwatsonstatic uint32_t 396187814Srwatsonssichan_setblocksize(kobj_t obj, void *data, uint32_t blocksize) 397187814Srwatson{ 398228458Sed struct sc_chinfo *ch = data; 399109525Sjmallett struct sc_pcminfo *scp = ch->parent; 400109525Sjmallett struct sc_info *sc = scp->sc; 401109525Sjmallett 402109525Sjmallett sndbuf_resize(ch->buffer, sc->dma_size / blocksize, blocksize); 403109525Sjmallett 404109525Sjmallett setup_dma(scp); 405109525Sjmallett 406109525Sjmallett return (sndbuf_getblksz(ch->buffer)); 407116083Sjmallett} 408116083Sjmallett 409109525Sjmallettuint32_t 410109525Sjmallettssi_dma_intr(void *arg, int chn) 411109525Sjmallett{ 412109525Sjmallett struct sc_pcminfo *scp; 413109525Sjmallett struct sdma_conf *conf; 414109525Sjmallett struct sc_chinfo *ch; 415109525Sjmallett struct sc_info *sc; 416109525Sjmallett int bufsize; 417109525Sjmallett 418109525Sjmallett scp = arg; 419109525Sjmallett ch = &scp->chan[0]; 420250710Smckusick sc = scp->sc; 421250710Smckusick conf = sc->conf; 422219899Sjmallett 423219899Sjmallett bufsize = sndbuf_getsize(ch->buffer); 424241842Seadler 425241842Seadler sc->pos += conf->period; 426250710Smckusick if (sc->pos >= bufsize) 427250710Smckusick sc->pos -= bufsize; 428250710Smckusick 429109525Sjmallett if (ch->run) 430109525Sjmallett chn_intr(ch->channel); 431109525Sjmallett 432109525Sjmallett return (0); 433109525Sjmallett} 434109525Sjmallett 435109525Sjmallettstatic int 436109525Sjmallettfind_sdma_controller(struct sc_info *sc) 437109525Sjmallett{ 438109525Sjmallett struct sdma_softc *sdma_sc; 439109525Sjmallett phandle_t node, sdma_node; 440109525Sjmallett device_t sdma_dev; 441109525Sjmallett int dts_value[8]; 442109525Sjmallett int len; 443109525Sjmallett 444198231Sru if ((node = ofw_bus_get_node(sc->dev)) == -1) 445219899Sjmallett return (ENXIO); 446219899Sjmallett 447109525Sjmallett if ((len = OF_getproplen(node, "dmas")) <= 0) 448109525Sjmallett return (ENXIO); 449109525Sjmallett 450109525Sjmallett OF_getprop(node, "dmas", &dts_value, len); 451109525Sjmallett 452109525Sjmallett sc->sdma_ev_rx = fdt32_to_cpu(dts_value[1]); 453228458Sed sc->sdma_ev_tx = fdt32_to_cpu(dts_value[5]); 45492839Simp 4551558Srgrimes sdma_node = OF_node_from_xref(fdt32_to_cpu(dts_value[0])); 45692806Sobrien 45792806Sobrien sdma_sc = NULL; 4581558Srgrimes 4591558Srgrimes sdma_dev = devclass_get_device(devclass_find("sdma"), 0); 4601558Srgrimes if (sdma_dev) 4611558Srgrimes sdma_sc = device_get_softc(sdma_dev); 4621558Srgrimes 4631558Srgrimes if (sdma_sc == NULL) { 4641558Srgrimes device_printf(sc->dev, "No sDMA found. Can't operate\n"); 4651558Srgrimes return (ENXIO); 4661558Srgrimes } 4671558Srgrimes 4681558Srgrimes sc->sdma_sc = sdma_sc; 4691558Srgrimes 4701558Srgrimes return (0); 4711558Srgrimes}; 4721558Srgrimes 4731558Srgrimesstatic int 4741558Srgrimessetup_dma(struct sc_pcminfo *scp) 475228458Sed{ 476187814Srwatson struct sdma_conf *conf; 477187814Srwatson struct sc_chinfo *ch; 478187814Srwatson struct sc_info *sc; 479187814Srwatson int fmt; 480187814Srwatson 481187814Srwatson ch = &scp->chan[0]; 482187814Srwatson sc = scp->sc; 483187814Srwatson conf = sc->conf; 484187814Srwatson 485187814Srwatson conf->ih = ssi_dma_intr; 486187814Srwatson conf->ih_user = scp; 487187814Srwatson conf->saddr = sc->buf_base_phys; 488187814Srwatson conf->daddr = rman_get_start(sc->res[0]) + SSI_STX0; 489187820Srwatson conf->event = sc->sdma_ev_tx; /* SDMA TX event */ 490187814Srwatson conf->period = sndbuf_getblksz(ch->buffer); 491187814Srwatson conf->num_bd = sndbuf_getblkcnt(ch->buffer); 492187814Srwatson 493187814Srwatson /* 494187814Srwatson * Word Length 495187814Srwatson * Can be 32, 24, 16 or 8 for sDMA. 496228458Sed * 497109525Sjmallett * SSI supports 24 at max. 498109525Sjmallett */ 499109525Sjmallett 500109525Sjmallett fmt = sndbuf_getfmt(ch->buffer); 501109525Sjmallett 502109525Sjmallett if (fmt & AFMT_16BIT) { 503109525Sjmallett conf->word_length = 16; 504109525Sjmallett conf->command = CMD_2BYTES; 505228458Sed } else if (fmt & AFMT_24BIT) { 50692839Simp conf->word_length = 24; 5071558Srgrimes conf->command = CMD_3BYTES; 508228898Sbrueffer } else { 5091558Srgrimes device_printf(sc->dev, "Unknown format\n"); 5101558Srgrimes return (-1); 511 } 512 513 return (0); 514} 515 516static int 517ssi_start(struct sc_pcminfo *scp) 518{ 519 struct sc_info *sc; 520 int reg; 521 522 sc = scp->sc; 523 524 if (sdma_configure(sc->sdma_channel, sc->conf) != 0) { 525 device_printf(sc->dev, "Can't configure sDMA\n"); 526 return (-1); 527 } 528 529 /* Enable DMA interrupt */ 530 reg = (SIER_TDMAE); 531 WRITE4(sc, SSI_SIER, reg); 532 533 sdma_start(sc->sdma_channel); 534 535 return (0); 536} 537 538static int 539ssi_stop(struct sc_pcminfo *scp) 540{ 541 struct sc_info *sc; 542 int reg; 543 544 sc = scp->sc; 545 546 reg = READ4(sc, SSI_SIER); 547 reg &= ~(SIER_TDMAE); 548 WRITE4(sc, SSI_SIER, reg); 549 550 sdma_stop(sc->sdma_channel); 551 552 bzero(sc->buf_base, sc->dma_size); 553 554 return (0); 555} 556 557static int 558ssichan_trigger(kobj_t obj, void *data, int go) 559{ 560 struct sc_pcminfo *scp; 561 struct sc_chinfo *ch; 562 struct sc_info *sc; 563 564 ch = data; 565 scp = ch->parent; 566 sc = scp->sc; 567 568 snd_mtxlock(sc->lock); 569 570 switch (go) { 571 case PCMTRIG_START: 572#if 0 573 device_printf(scp->dev, "trigger start\n"); 574#endif 575 ch->run = 1; 576 577 ssi_start(scp); 578 579 break; 580 581 case PCMTRIG_STOP: 582 case PCMTRIG_ABORT: 583#if 0 584 device_printf(scp->dev, "trigger stop or abort\n"); 585#endif 586 ch->run = 0; 587 588 ssi_stop(scp); 589 590 break; 591 } 592 593 snd_mtxunlock(sc->lock); 594 595 return (0); 596} 597 598static uint32_t 599ssichan_getptr(kobj_t obj, void *data) 600{ 601 struct sc_pcminfo *scp; 602 struct sc_chinfo *ch; 603 struct sc_info *sc; 604 605 ch = data; 606 scp = ch->parent; 607 sc = scp->sc; 608 609 return (sc->pos); 610} 611 612static uint32_t ssi_pfmt[] = { 613 SND_FORMAT(AFMT_S24_LE, 2, 0), 614 0 615}; 616 617static struct pcmchan_caps ssi_pcaps = {44100, 192000, ssi_pfmt, 0}; 618 619static struct pcmchan_caps * 620ssichan_getcaps(kobj_t obj, void *data) 621{ 622 623 return (&ssi_pcaps); 624} 625 626static kobj_method_t ssichan_methods[] = { 627 KOBJMETHOD(channel_init, ssichan_init), 628 KOBJMETHOD(channel_free, ssichan_free), 629 KOBJMETHOD(channel_setformat, ssichan_setformat), 630 KOBJMETHOD(channel_setspeed, ssichan_setspeed), 631 KOBJMETHOD(channel_setblocksize, ssichan_setblocksize), 632 KOBJMETHOD(channel_trigger, ssichan_trigger), 633 KOBJMETHOD(channel_getptr, ssichan_getptr), 634 KOBJMETHOD(channel_getcaps, ssichan_getcaps), 635 KOBJMETHOD_END 636}; 637CHANNEL_DECLARE(ssichan); 638 639static int 640ssi_probe(device_t dev) 641{ 642 643 if (!ofw_bus_status_okay(dev)) 644 return (ENXIO); 645 646 if (!ofw_bus_is_compatible(dev, "fsl,imx6q-ssi")) 647 return (ENXIO); 648 649 device_set_desc(dev, "i.MX6 Synchronous Serial Interface (SSI)"); 650 return (BUS_PROBE_DEFAULT); 651} 652 653static void 654ssi_intr(void *arg) 655{ 656 struct sc_pcminfo *scp; 657 struct sc_chinfo *ch; 658 struct sc_info *sc; 659 660 scp = arg; 661 sc = scp->sc; 662 ch = &scp->chan[0]; 663 664 /* We don't use SSI interrupt */ 665#if 0 666 device_printf(sc->dev, "SSI Intr 0x%08x\n", 667 READ4(sc, SSI_SISR)); 668#endif 669} 670 671static void 672setup_ssi(struct sc_info *sc) 673{ 674 int reg; 675 676 reg = READ4(sc, SSI_STCCR); 677 reg &= ~(WL3_WL0_M << WL3_WL0_S); 678 reg |= (0xb << WL3_WL0_S); /* 24 bit */ 679 reg &= ~(DC4_DC0_M << DC4_DC0_S); 680 reg |= (1 << DC4_DC0_S); /* 2 words per frame */ 681 reg &= ~(STCCR_DIV2); /* Divide by 1 */ 682 reg &= ~(STCCR_PSR); /* Divide by 1 */ 683 reg &= ~(PM7_PM0_M << PM7_PM0_S); 684 reg |= (1 << PM7_PM0_S); /* Divide by 2 */ 685 WRITE4(sc, SSI_STCCR, reg); 686 687 reg = READ4(sc, SSI_SFCSR); 688 reg &= ~(SFCSR_TFWM0_M << SFCSR_TFWM0_S); 689 reg |= (8 << SFCSR_TFWM0_S); /* empty slots */ 690 WRITE4(sc, SSI_SFCSR, reg); 691 692 reg = READ4(sc, SSI_STCR); 693 reg |= (STCR_TFEN0); 694 reg &= ~(STCR_TFEN1); 695 reg &= ~(STCR_TSHFD); /* MSB */ 696 reg |= (STCR_TXBIT0); 697 reg |= (STCR_TXDIR | STCR_TFDIR); 698 reg |= (STCR_TSCKP); /* falling edge */ 699 reg |= (STCR_TFSI); 700 reg &= ~(STCR_TFSI); /* active high frame sync */ 701 reg &= ~(STCR_TFSL); 702 reg |= STCR_TEFS; 703 WRITE4(sc, SSI_STCR, reg); 704 705 reg = READ4(sc, SSI_SCR); 706 reg &= ~(SCR_I2S_MODE_M << SCR_I2S_MODE_S); /* Not master */ 707 reg |= (SCR_SSIEN | SCR_TE); 708 reg |= (SCR_NET); 709 reg |= (SCR_SYN); 710 WRITE4(sc, SSI_SCR, reg); 711} 712 713static void 714ssi_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 715{ 716 bus_addr_t *addr; 717 718 if (err) 719 return; 720 721 addr = (bus_addr_t*)arg; 722 *addr = segs[0].ds_addr; 723} 724 725static int 726ssi_attach(device_t dev) 727{ 728 char status[SND_STATUSLEN]; 729 struct sc_pcminfo *scp; 730 struct sc_info *sc; 731 int err; 732 733 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO); 734 sc->dev = dev; 735 sc->sr = &rate_map[0]; 736 sc->pos = 0; 737 sc->conf = malloc(sizeof(struct sdma_conf), M_DEVBUF, M_WAITOK | M_ZERO); 738 739 sc->lock = snd_mtxcreate(device_get_nameunit(dev), "ssi softc"); 740 if (sc->lock == NULL) { 741 device_printf(dev, "Can't create mtx\n"); 742 return (ENXIO); 743 } 744 745 if (bus_alloc_resources(dev, ssi_spec, sc->res)) { 746 device_printf(dev, "could not allocate resources\n"); 747 return (ENXIO); 748 } 749 750 /* Memory interface */ 751 sc->bst = rman_get_bustag(sc->res[0]); 752 sc->bsh = rman_get_bushandle(sc->res[0]); 753 754 /* SDMA */ 755 if (find_sdma_controller(sc)) { 756 device_printf(dev, "could not find active SDMA\n"); 757 return (ENXIO); 758 } 759 760 /* Setup PCM */ 761 scp = malloc(sizeof(struct sc_pcminfo), M_DEVBUF, M_NOWAIT | M_ZERO); 762 scp->sc = sc; 763 scp->dev = dev; 764 765 /* 766 * Maximum possible DMA buffer. 767 * Will be used partially to match 24 bit word. 768 */ 769 sc->dma_size = 131072; 770 771 /* 772 * Must use dma_size boundary as modulo feature required. 773 * Modulo feature allows setup circular buffer. 774 */ 775 776 err = bus_dma_tag_create( 777 bus_get_dma_tag(sc->dev), 778 4, sc->dma_size, /* alignment, boundary */ 779 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 780 BUS_SPACE_MAXADDR, /* highaddr */ 781 NULL, NULL, /* filter, filterarg */ 782 sc->dma_size, 1, /* maxsize, nsegments */ 783 sc->dma_size, 0, /* maxsegsize, flags */ 784 NULL, NULL, /* lockfunc, lockarg */ 785 &sc->dma_tag); 786 787 err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->buf_base, 788 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &sc->dma_map); 789 if (err) { 790 device_printf(dev, "cannot allocate framebuffer\n"); 791 return (ENXIO); 792 } 793 794 err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->buf_base, 795 sc->dma_size, ssi_dmamap_cb, &sc->buf_base_phys, BUS_DMA_NOWAIT); 796 if (err) { 797 device_printf(dev, "cannot load DMA map\n"); 798 return (ENXIO); 799 } 800 801 bzero(sc->buf_base, sc->dma_size); 802 803 /* Setup interrupt handler */ 804 err = bus_setup_intr(dev, sc->res[1], INTR_MPSAFE | INTR_TYPE_AV, 805 NULL, ssi_intr, scp, &sc->ih); 806 if (err) { 807 device_printf(dev, "Unable to alloc interrupt resource.\n"); 808 return (ENXIO); 809 } 810 811 pcm_setflags(dev, pcm_getflags(dev) | SD_F_MPSAFE); 812 813 err = pcm_register(dev, scp, 1, 0); 814 if (err) { 815 device_printf(dev, "Can't register pcm.\n"); 816 return (ENXIO); 817 } 818 819 scp->chnum = 0; 820 pcm_addchan(dev, PCMDIR_PLAY, &ssichan_class, scp); 821 scp->chnum++; 822 823 snprintf(status, SND_STATUSLEN, "at simplebus"); 824 pcm_setstatus(dev, status); 825 826 mixer_init(dev, &ssimixer_class, scp); 827 setup_ssi(sc); 828 829 imx_ccm_ssi_configure(dev); 830 831 sc->sdma_channel = sdma_alloc(); 832 if (sc->sdma_channel < 0) { 833 device_printf(sc->dev, "Can't get sDMA channel\n"); 834 return (1); 835 } 836 837 return (0); 838} 839 840static device_method_t ssi_pcm_methods[] = { 841 DEVMETHOD(device_probe, ssi_probe), 842 DEVMETHOD(device_attach, ssi_attach), 843 { 0, 0 } 844}; 845 846static driver_t ssi_pcm_driver = { 847 "pcm", 848 ssi_pcm_methods, 849 PCM_SOFTC_SIZE, 850}; 851 852DRIVER_MODULE(ssi, simplebus, ssi_pcm_driver, pcm_devclass, 0, 0); 853MODULE_DEPEND(ssi, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); 854MODULE_VERSION(ssi, 1); 855