819 lines
18 KiB
C
819 lines
18 KiB
C
/*
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* Renesas R-Car SSIU/SSI support
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*
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* Copyright (C) 2013 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* Based on fsi.c
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* Kuninori Morimoto <morimoto.kuninori@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include "rsnd.h"
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#define RSND_SSI_NAME_SIZE 16
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/*
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* SSICR
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*/
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#define FORCE (1 << 31) /* Fixed */
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#define DMEN (1 << 28) /* DMA Enable */
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#define UIEN (1 << 27) /* Underflow Interrupt Enable */
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#define OIEN (1 << 26) /* Overflow Interrupt Enable */
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#define IIEN (1 << 25) /* Idle Mode Interrupt Enable */
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#define DIEN (1 << 24) /* Data Interrupt Enable */
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#define DWL_8 (0 << 19) /* Data Word Length */
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#define DWL_16 (1 << 19) /* Data Word Length */
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#define DWL_18 (2 << 19) /* Data Word Length */
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#define DWL_20 (3 << 19) /* Data Word Length */
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#define DWL_22 (4 << 19) /* Data Word Length */
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#define DWL_24 (5 << 19) /* Data Word Length */
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#define DWL_32 (6 << 19) /* Data Word Length */
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#define SWL_32 (3 << 16) /* R/W System Word Length */
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#define SCKD (1 << 15) /* Serial Bit Clock Direction */
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#define SWSD (1 << 14) /* Serial WS Direction */
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#define SCKP (1 << 13) /* Serial Bit Clock Polarity */
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#define SWSP (1 << 12) /* Serial WS Polarity */
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#define SDTA (1 << 10) /* Serial Data Alignment */
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#define DEL (1 << 8) /* Serial Data Delay */
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#define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
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#define TRMD (1 << 1) /* Transmit/Receive Mode Select */
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#define EN (1 << 0) /* SSI Module Enable */
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/*
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* SSISR
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*/
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#define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
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#define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
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#define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
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#define DIRQ (1 << 24) /* Data Interrupt Status Flag */
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/*
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* SSIWSR
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*/
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#define CONT (1 << 8) /* WS Continue Function */
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#define SSI_NAME "ssi"
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struct rsnd_ssi {
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struct rsnd_ssi_platform_info *info; /* rcar_snd.h */
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struct rsnd_ssi *parent;
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struct rsnd_mod mod;
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u32 cr_own;
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u32 cr_clk;
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int chan;
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int err;
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unsigned int usrcnt;
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};
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#define for_each_rsnd_ssi(pos, priv, i) \
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for (i = 0; \
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(i < rsnd_ssi_nr(priv)) && \
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((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
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i++)
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#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
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#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
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#define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma))
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#define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0)
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#define rsnd_ssi_parent(ssi) ((ssi)->parent)
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#define rsnd_ssi_mode_flags(p) ((p)->info->flags)
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#define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id)
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#define rsnd_ssi_of_node(priv) \
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of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi")
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int rsnd_ssi_use_busif(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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int use_busif = 0;
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if (!rsnd_ssi_is_dma_mode(mod))
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return 0;
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if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF))
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use_busif = 1;
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if (rsnd_io_to_mod_src(io))
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use_busif = 1;
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return use_busif;
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}
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static void rsnd_ssi_status_check(struct rsnd_mod *mod,
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u32 bit)
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{
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struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
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struct device *dev = rsnd_priv_to_dev(priv);
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u32 status;
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int i;
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for (i = 0; i < 1024; i++) {
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status = rsnd_mod_read(mod, SSISR);
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if (status & bit)
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return;
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udelay(50);
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}
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dev_warn(dev, "status check failed\n");
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}
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static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi,
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struct rsnd_dai_stream *io)
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{
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struct rsnd_priv *priv = rsnd_io_to_priv(io);
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struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
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struct device *dev = rsnd_priv_to_dev(priv);
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int i, j, ret;
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int adg_clk_div_table[] = {
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1, 6, /* see adg.c */
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};
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int ssi_clk_mul_table[] = {
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1, 2, 4, 8, 16, 6, 12,
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};
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unsigned int main_rate;
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unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime);
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/*
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* Find best clock, and try to start ADG
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*/
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for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) {
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for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
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/*
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* this driver is assuming that
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* system word is 64fs (= 2 x 32bit)
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* see rsnd_ssi_init()
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*/
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main_rate = rate / adg_clk_div_table[i]
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* 32 * 2 * ssi_clk_mul_table[j];
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ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate);
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if (0 == ret) {
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ssi->cr_clk = FORCE | SWL_32 |
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SCKD | SWSD | CKDV(j);
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dev_dbg(dev, "%s[%d] outputs %u Hz\n",
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rsnd_mod_name(&ssi->mod),
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rsnd_mod_id(&ssi->mod), rate);
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return 0;
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}
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}
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}
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dev_err(dev, "unsupported clock rate\n");
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return -EIO;
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}
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static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi)
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{
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ssi->cr_clk = 0;
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rsnd_adg_ssi_clk_stop(&ssi->mod);
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}
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static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
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struct rsnd_dai_stream *io)
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{
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struct rsnd_priv *priv = rsnd_io_to_priv(io);
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struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
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struct device *dev = rsnd_priv_to_dev(priv);
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u32 cr_mode;
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u32 cr;
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if (0 == ssi->usrcnt) {
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rsnd_mod_hw_start(&ssi->mod);
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if (rsnd_rdai_is_clk_master(rdai)) {
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struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
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if (ssi_parent)
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rsnd_ssi_hw_start(ssi_parent, io);
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else
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rsnd_ssi_master_clk_start(ssi, io);
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}
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}
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if (rsnd_ssi_is_dma_mode(&ssi->mod)) {
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cr_mode = UIEN | OIEN | /* over/under run */
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DMEN; /* DMA : enable DMA */
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} else {
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cr_mode = DIEN; /* PIO : enable Data interrupt */
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}
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cr = ssi->cr_own |
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ssi->cr_clk |
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cr_mode |
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EN;
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rsnd_mod_write(&ssi->mod, SSICR, cr);
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/* enable WS continue */
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if (rsnd_rdai_is_clk_master(rdai))
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rsnd_mod_write(&ssi->mod, SSIWSR, CONT);
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/* clear error status */
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rsnd_mod_write(&ssi->mod, SSISR, 0);
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ssi->usrcnt++;
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dev_dbg(dev, "%s[%d] hw started\n",
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rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
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}
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static void rsnd_ssi_hw_stop(struct rsnd_dai_stream *io, struct rsnd_ssi *ssi)
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{
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struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
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struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
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struct device *dev = rsnd_priv_to_dev(priv);
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u32 cr;
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if (0 == ssi->usrcnt) {
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dev_err(dev, "%s called without starting\n", __func__);
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return;
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}
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ssi->usrcnt--;
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if (0 == ssi->usrcnt) {
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/*
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* disable all IRQ,
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* and, wait all data was sent
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*/
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cr = ssi->cr_own |
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ssi->cr_clk;
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rsnd_mod_write(&ssi->mod, SSICR, cr | EN);
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rsnd_ssi_status_check(&ssi->mod, DIRQ);
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/*
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* disable SSI,
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* and, wait idle state
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*/
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rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */
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rsnd_ssi_status_check(&ssi->mod, IIRQ);
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if (rsnd_rdai_is_clk_master(rdai)) {
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struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
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if (ssi_parent)
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rsnd_ssi_hw_stop(io, ssi_parent);
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else
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rsnd_ssi_master_clk_stop(ssi);
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}
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rsnd_mod_hw_stop(&ssi->mod);
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ssi->chan = 0;
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}
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dev_dbg(dev, "%s[%d] hw stopped\n",
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rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
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}
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/*
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* SSI mod common functions
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*/
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static int rsnd_ssi_init(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
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struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
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u32 cr;
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cr = FORCE;
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/*
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* always use 32bit system word for easy clock calculation.
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* see also rsnd_ssi_master_clk_enable()
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*/
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cr |= SWL_32;
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/*
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* init clock settings for SSICR
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*/
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switch (runtime->sample_bits) {
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case 16:
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cr |= DWL_16;
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break;
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case 32:
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cr |= DWL_24;
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break;
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default:
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return -EIO;
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}
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if (rdai->bit_clk_inv)
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cr |= SCKP;
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if (rdai->frm_clk_inv)
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cr |= SWSP;
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if (rdai->data_alignment)
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cr |= SDTA;
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if (rdai->sys_delay)
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cr |= DEL;
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if (rsnd_io_is_play(io))
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cr |= TRMD;
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/*
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* set ssi parameter
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*/
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ssi->cr_own = cr;
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ssi->err = -1; /* ignore 1st error */
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return 0;
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}
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static int rsnd_ssi_quit(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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struct device *dev = rsnd_priv_to_dev(priv);
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if (ssi->err > 0)
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dev_warn(dev, "%s[%d] under/over flow err = %d\n",
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rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err);
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ssi->cr_own = 0;
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ssi->err = 0;
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return 0;
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}
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static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi);
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int chan = params_channels(params);
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/*
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* Already working.
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* It will happen if SSI has parent/child connection.
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*/
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if (ssi->usrcnt) {
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/*
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* it is error if child <-> parent SSI uses
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* different channels.
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*/
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if (ssi->chan != chan)
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return -EIO;
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}
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/* It will be removed on rsnd_ssi_hw_stop */
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ssi->chan = chan;
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if (ssi_parent)
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return rsnd_ssi_hw_params(&ssi_parent->mod, io,
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substream, params);
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return 0;
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}
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static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
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{
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/* under/over flow error */
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if (status & (UIRQ | OIRQ)) {
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ssi->err++;
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/* clear error status */
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rsnd_mod_write(&ssi->mod, SSISR, 0);
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}
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}
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static int rsnd_ssi_start(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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rsnd_src_ssiu_start(mod, io, rsnd_ssi_use_busif(io, mod));
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rsnd_ssi_hw_start(ssi, io);
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rsnd_src_ssi_irq_enable(mod);
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return 0;
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}
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static int rsnd_ssi_stop(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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rsnd_src_ssi_irq_disable(mod);
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rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
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rsnd_ssi_hw_stop(io, ssi);
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rsnd_src_ssiu_stop(mod, io);
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return 0;
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}
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static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io)
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{
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
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int is_dma = rsnd_ssi_is_dma_mode(mod);
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u32 status;
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bool elapsed = false;
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spin_lock(&priv->lock);
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/* ignore all cases if not working */
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if (!rsnd_io_is_working(io))
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goto rsnd_ssi_interrupt_out;
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status = rsnd_mod_read(mod, SSISR);
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/* PIO only */
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if (!is_dma && (status & DIRQ)) {
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struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
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u32 *buf = (u32 *)(runtime->dma_area +
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rsnd_dai_pointer_offset(io, 0));
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/*
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* 8/16/32 data can be assesse to TDR/RDR register
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* directly as 32bit data
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* see rsnd_ssi_init()
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*/
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if (rsnd_io_is_play(io))
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rsnd_mod_write(mod, SSITDR, *buf);
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else
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*buf = rsnd_mod_read(mod, SSIRDR);
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elapsed = rsnd_dai_pointer_update(io, sizeof(*buf));
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}
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/* DMA only */
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if (is_dma && (status & (UIRQ | OIRQ))) {
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struct device *dev = rsnd_priv_to_dev(priv);
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/*
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* restart SSI
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*/
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dev_dbg(dev, "%s[%d] restart\n",
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rsnd_mod_name(mod), rsnd_mod_id(mod));
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rsnd_ssi_stop(mod, io, priv);
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if (ssi->err < 1024)
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rsnd_ssi_start(mod, io, priv);
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else
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dev_warn(dev, "no more SSI restart\n");
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}
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rsnd_ssi_record_error(ssi, status);
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rsnd_ssi_interrupt_out:
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spin_unlock(&priv->lock);
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if (elapsed)
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rsnd_dai_period_elapsed(io);
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}
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static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
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{
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struct rsnd_mod *mod = data;
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rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
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return IRQ_HANDLED;
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}
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/*
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* SSI PIO
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*/
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static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
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struct rsnd_dai_stream *io,
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struct rsnd_priv *priv)
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{
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struct device *dev = rsnd_priv_to_dev(priv);
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struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
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int ret;
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ret = devm_request_irq(dev, ssi->info->irq,
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rsnd_ssi_interrupt,
|
|
IRQF_SHARED,
|
|
dev_name(dev), mod);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
|
|
.name = SSI_NAME,
|
|
.probe = rsnd_ssi_pio_probe,
|
|
.init = rsnd_ssi_init,
|
|
.quit = rsnd_ssi_quit,
|
|
.start = rsnd_ssi_start,
|
|
.stop = rsnd_ssi_stop,
|
|
.hw_params = rsnd_ssi_hw_params,
|
|
};
|
|
|
|
static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
|
|
struct rsnd_dai_stream *io,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
int dma_id = ssi->info->dma_id;
|
|
int ret;
|
|
|
|
ret = devm_request_irq(dev, ssi->info->irq,
|
|
rsnd_ssi_interrupt,
|
|
IRQF_SHARED,
|
|
dev_name(dev), mod);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rsnd_dma_init(
|
|
io, rsnd_mod_to_dma(mod),
|
|
dma_id);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
|
|
struct rsnd_dai_stream *io,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
int irq = ssi->info->irq;
|
|
|
|
rsnd_dma_quit(io, rsnd_mod_to_dma(mod));
|
|
|
|
/* PIO will request IRQ again */
|
|
devm_free_irq(dev, irq, ssi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsnd_ssi_fallback(struct rsnd_mod *mod,
|
|
struct rsnd_dai_stream *io,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
|
|
/*
|
|
* fallback to PIO
|
|
*
|
|
* SSI .probe might be called again.
|
|
* see
|
|
* rsnd_rdai_continuance_probe()
|
|
*/
|
|
mod->ops = &rsnd_ssi_pio_ops;
|
|
|
|
dev_info(dev, "%s[%d] fallback to PIO mode\n",
|
|
rsnd_mod_name(mod), rsnd_mod_id(mod));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
|
|
struct rsnd_dai_stream *io,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
|
|
|
|
rsnd_dma_start(io, dma);
|
|
|
|
rsnd_ssi_start(mod, io, priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
|
|
struct rsnd_dai_stream *io,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
|
|
|
|
rsnd_ssi_stop(mod, io, priv);
|
|
|
|
rsnd_dma_stop(io, dma);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dma_chan *rsnd_ssi_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;
|
|
|
|
if (rsnd_ssi_use_busif(io, mod))
|
|
name = is_play ? "rxu" : "txu";
|
|
else
|
|
name = is_play ? "rx" : "tx";
|
|
|
|
return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
|
|
mod, name);
|
|
}
|
|
|
|
static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
|
|
.name = SSI_NAME,
|
|
.dma_req = rsnd_ssi_dma_req,
|
|
.probe = rsnd_ssi_dma_probe,
|
|
.remove = rsnd_ssi_dma_remove,
|
|
.init = rsnd_ssi_init,
|
|
.quit = rsnd_ssi_quit,
|
|
.start = rsnd_ssi_dma_start,
|
|
.stop = rsnd_ssi_dma_stop,
|
|
.fallback = rsnd_ssi_fallback,
|
|
.hw_params = rsnd_ssi_hw_params,
|
|
};
|
|
|
|
int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
|
|
{
|
|
return mod->ops == &rsnd_ssi_dma_ops;
|
|
}
|
|
|
|
|
|
/*
|
|
* Non SSI
|
|
*/
|
|
static struct rsnd_mod_ops rsnd_ssi_non_ops = {
|
|
.name = SSI_NAME,
|
|
};
|
|
|
|
/*
|
|
* ssi mod function
|
|
*/
|
|
struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
|
|
{
|
|
if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
|
|
id = 0;
|
|
|
|
return &((struct rsnd_ssi *)(priv->ssi) + id)->mod;
|
|
}
|
|
|
|
int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
|
|
{
|
|
struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
|
|
|
|
return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
|
|
}
|
|
|
|
static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi)
|
|
{
|
|
if (!rsnd_ssi_is_pin_sharing(&ssi->mod))
|
|
return;
|
|
|
|
switch (rsnd_mod_id(&ssi->mod)) {
|
|
case 1:
|
|
case 2:
|
|
ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0));
|
|
break;
|
|
case 4:
|
|
ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3));
|
|
break;
|
|
case 8:
|
|
ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7));
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void rsnd_of_parse_ssi(struct platform_device *pdev,
|
|
const struct rsnd_of_data *of_data,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct device_node *node;
|
|
struct device_node *np;
|
|
struct rsnd_ssi_platform_info *ssi_info;
|
|
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
|
|
struct device *dev = &pdev->dev;
|
|
int nr, i;
|
|
|
|
if (!of_data)
|
|
return;
|
|
|
|
node = rsnd_ssi_of_node(priv);
|
|
if (!node)
|
|
return;
|
|
|
|
nr = of_get_child_count(node);
|
|
if (!nr)
|
|
goto rsnd_of_parse_ssi_end;
|
|
|
|
ssi_info = devm_kzalloc(dev,
|
|
sizeof(struct rsnd_ssi_platform_info) * nr,
|
|
GFP_KERNEL);
|
|
if (!ssi_info) {
|
|
dev_err(dev, "ssi info allocation error\n");
|
|
goto rsnd_of_parse_ssi_end;
|
|
}
|
|
|
|
info->ssi_info = ssi_info;
|
|
info->ssi_info_nr = nr;
|
|
|
|
i = -1;
|
|
for_each_child_of_node(node, np) {
|
|
i++;
|
|
|
|
ssi_info = info->ssi_info + i;
|
|
|
|
/*
|
|
* pin settings
|
|
*/
|
|
if (of_get_property(np, "shared-pin", NULL))
|
|
ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE;
|
|
|
|
/*
|
|
* irq
|
|
*/
|
|
ssi_info->irq = irq_of_parse_and_map(np, 0);
|
|
|
|
/*
|
|
* DMA
|
|
*/
|
|
ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ?
|
|
0 : 1;
|
|
|
|
if (of_get_property(np, "no-busif", NULL))
|
|
ssi_info->flags |= RSND_SSI_NO_BUSIF;
|
|
}
|
|
|
|
rsnd_of_parse_ssi_end:
|
|
of_node_put(node);
|
|
}
|
|
|
|
int rsnd_ssi_probe(struct platform_device *pdev,
|
|
const struct rsnd_of_data *of_data,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rcar_snd_info *info = rsnd_priv_to_info(priv);
|
|
struct rsnd_ssi_platform_info *pinfo;
|
|
struct device *dev = rsnd_priv_to_dev(priv);
|
|
struct rsnd_mod_ops *ops;
|
|
struct clk *clk;
|
|
struct rsnd_ssi *ssi;
|
|
char name[RSND_SSI_NAME_SIZE];
|
|
int i, nr, ret;
|
|
|
|
rsnd_of_parse_ssi(pdev, of_data, priv);
|
|
|
|
/*
|
|
* init SSI
|
|
*/
|
|
nr = info->ssi_info_nr;
|
|
ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL);
|
|
if (!ssi) {
|
|
dev_err(dev, "SSI allocate failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->ssi = ssi;
|
|
priv->ssi_nr = nr;
|
|
|
|
for_each_rsnd_ssi(ssi, priv, i) {
|
|
pinfo = &info->ssi_info[i];
|
|
|
|
snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
|
|
SSI_NAME, i);
|
|
|
|
clk = devm_clk_get(dev, name);
|
|
if (IS_ERR(clk))
|
|
return PTR_ERR(clk);
|
|
|
|
ssi->info = pinfo;
|
|
|
|
ops = &rsnd_ssi_non_ops;
|
|
if (pinfo->dma_id > 0)
|
|
ops = &rsnd_ssi_dma_ops;
|
|
else if (rsnd_ssi_pio_available(ssi))
|
|
ops = &rsnd_ssi_pio_ops;
|
|
|
|
ret = rsnd_mod_init(priv, &ssi->mod, ops, clk, RSND_MOD_SSI, i);
|
|
if (ret)
|
|
return ret;
|
|
|
|
rsnd_ssi_parent_setup(priv, ssi);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rsnd_ssi_remove(struct platform_device *pdev,
|
|
struct rsnd_priv *priv)
|
|
{
|
|
struct rsnd_ssi *ssi;
|
|
int i;
|
|
|
|
for_each_rsnd_ssi(ssi, priv, i) {
|
|
rsnd_mod_quit(&ssi->mod);
|
|
}
|
|
}
|