738 lines
17 KiB
C
738 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// ALSA Soc Audio Layer - I2S core for newer Samsung SoCs.
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//
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// Copyright (c) 2006 Wolfson Microelectronics PLC.
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// Graeme Gregory graeme.gregory@wolfsonmicro.com
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// linux@wolfsonmicro.com
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//
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// Copyright (c) 2008, 2007, 2004-2005 Simtec Electronics
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// http://armlinux.simtec.co.uk/
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// Ben Dooks <ben@simtec.co.uk>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include "regs-i2s-v2.h"
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#include "s3c-i2s-v2.h"
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#undef S3C_IIS_V2_SUPPORTED
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#if defined(CONFIG_CPU_S3C2412) \
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|| defined(CONFIG_ARCH_S3C64XX) || defined(CONFIG_CPU_S5PV210)
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#define S3C_IIS_V2_SUPPORTED
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#endif
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#ifndef S3C_IIS_V2_SUPPORTED
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#error Unsupported CPU model
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#endif
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#define S3C2412_I2S_DEBUG_CON 0
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static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
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{
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return snd_soc_dai_get_drvdata(cpu_dai);
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}
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#define bit_set(v, b) (((v) & (b)) ? 1 : 0)
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#if S3C2412_I2S_DEBUG_CON
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static void dbg_showcon(const char *fn, u32 con)
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{
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printk(KERN_DEBUG "%s: LRI=%d, TXFEMPT=%d, RXFEMPT=%d, TXFFULL=%d, RXFFULL=%d\n", fn,
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bit_set(con, S3C2412_IISCON_LRINDEX),
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bit_set(con, S3C2412_IISCON_TXFIFO_EMPTY),
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bit_set(con, S3C2412_IISCON_RXFIFO_EMPTY),
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bit_set(con, S3C2412_IISCON_TXFIFO_FULL),
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bit_set(con, S3C2412_IISCON_RXFIFO_FULL));
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printk(KERN_DEBUG "%s: PAUSE: TXDMA=%d, RXDMA=%d, TXCH=%d, RXCH=%d\n",
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fn,
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bit_set(con, S3C2412_IISCON_TXDMA_PAUSE),
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bit_set(con, S3C2412_IISCON_RXDMA_PAUSE),
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bit_set(con, S3C2412_IISCON_TXCH_PAUSE),
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bit_set(con, S3C2412_IISCON_RXCH_PAUSE));
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printk(KERN_DEBUG "%s: ACTIVE: TXDMA=%d, RXDMA=%d, IIS=%d\n", fn,
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bit_set(con, S3C2412_IISCON_TXDMA_ACTIVE),
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bit_set(con, S3C2412_IISCON_RXDMA_ACTIVE),
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bit_set(con, S3C2412_IISCON_IIS_ACTIVE));
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}
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#else
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static inline void dbg_showcon(const char *fn, u32 con)
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{
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}
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#endif
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/* Turn on or off the transmission path. */
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static void s3c2412_snd_txctrl(struct s3c_i2sv2_info *i2s, int on)
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{
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void __iomem *regs = i2s->regs;
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u32 fic, con, mod;
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pr_debug("%s(%d)\n", __func__, on);
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fic = readl(regs + S3C2412_IISFIC);
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con = readl(regs + S3C2412_IISCON);
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mod = readl(regs + S3C2412_IISMOD);
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pr_debug("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
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if (on) {
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con |= S3C2412_IISCON_TXDMA_ACTIVE | S3C2412_IISCON_IIS_ACTIVE;
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con &= ~S3C2412_IISCON_TXDMA_PAUSE;
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con &= ~S3C2412_IISCON_TXCH_PAUSE;
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switch (mod & S3C2412_IISMOD_MODE_MASK) {
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case S3C2412_IISMOD_MODE_TXONLY:
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case S3C2412_IISMOD_MODE_TXRX:
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/* do nothing, we are in the right mode */
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break;
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case S3C2412_IISMOD_MODE_RXONLY:
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mod &= ~S3C2412_IISMOD_MODE_MASK;
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mod |= S3C2412_IISMOD_MODE_TXRX;
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break;
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default:
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dev_err(i2s->dev, "TXEN: Invalid MODE %x in IISMOD\n",
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mod & S3C2412_IISMOD_MODE_MASK);
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break;
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}
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writel(con, regs + S3C2412_IISCON);
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writel(mod, regs + S3C2412_IISMOD);
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} else {
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/* Note, we do not have any indication that the FIFO problems
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* tha the S3C2410/2440 had apply here, so we should be able
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* to disable the DMA and TX without resetting the FIFOS.
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*/
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con |= S3C2412_IISCON_TXDMA_PAUSE;
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con |= S3C2412_IISCON_TXCH_PAUSE;
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con &= ~S3C2412_IISCON_TXDMA_ACTIVE;
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switch (mod & S3C2412_IISMOD_MODE_MASK) {
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case S3C2412_IISMOD_MODE_TXRX:
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mod &= ~S3C2412_IISMOD_MODE_MASK;
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mod |= S3C2412_IISMOD_MODE_RXONLY;
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break;
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case S3C2412_IISMOD_MODE_TXONLY:
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mod &= ~S3C2412_IISMOD_MODE_MASK;
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con &= ~S3C2412_IISCON_IIS_ACTIVE;
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break;
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default:
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dev_err(i2s->dev, "TXDIS: Invalid MODE %x in IISMOD\n",
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mod & S3C2412_IISMOD_MODE_MASK);
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break;
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}
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writel(mod, regs + S3C2412_IISMOD);
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writel(con, regs + S3C2412_IISCON);
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}
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fic = readl(regs + S3C2412_IISFIC);
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dbg_showcon(__func__, con);
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pr_debug("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
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}
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static void s3c2412_snd_rxctrl(struct s3c_i2sv2_info *i2s, int on)
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{
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void __iomem *regs = i2s->regs;
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u32 fic, con, mod;
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pr_debug("%s(%d)\n", __func__, on);
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fic = readl(regs + S3C2412_IISFIC);
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con = readl(regs + S3C2412_IISCON);
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mod = readl(regs + S3C2412_IISMOD);
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pr_debug("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
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if (on) {
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con |= S3C2412_IISCON_RXDMA_ACTIVE | S3C2412_IISCON_IIS_ACTIVE;
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con &= ~S3C2412_IISCON_RXDMA_PAUSE;
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con &= ~S3C2412_IISCON_RXCH_PAUSE;
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switch (mod & S3C2412_IISMOD_MODE_MASK) {
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case S3C2412_IISMOD_MODE_TXRX:
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case S3C2412_IISMOD_MODE_RXONLY:
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/* do nothing, we are in the right mode */
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break;
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case S3C2412_IISMOD_MODE_TXONLY:
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mod &= ~S3C2412_IISMOD_MODE_MASK;
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mod |= S3C2412_IISMOD_MODE_TXRX;
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break;
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default:
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dev_err(i2s->dev, "RXEN: Invalid MODE %x in IISMOD\n",
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mod & S3C2412_IISMOD_MODE_MASK);
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}
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writel(mod, regs + S3C2412_IISMOD);
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writel(con, regs + S3C2412_IISCON);
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} else {
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/* See txctrl notes on FIFOs. */
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con &= ~S3C2412_IISCON_RXDMA_ACTIVE;
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con |= S3C2412_IISCON_RXDMA_PAUSE;
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con |= S3C2412_IISCON_RXCH_PAUSE;
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switch (mod & S3C2412_IISMOD_MODE_MASK) {
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case S3C2412_IISMOD_MODE_RXONLY:
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con &= ~S3C2412_IISCON_IIS_ACTIVE;
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mod &= ~S3C2412_IISMOD_MODE_MASK;
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break;
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case S3C2412_IISMOD_MODE_TXRX:
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mod &= ~S3C2412_IISMOD_MODE_MASK;
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mod |= S3C2412_IISMOD_MODE_TXONLY;
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break;
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default:
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dev_err(i2s->dev, "RXDIS: Invalid MODE %x in IISMOD\n",
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mod & S3C2412_IISMOD_MODE_MASK);
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}
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writel(con, regs + S3C2412_IISCON);
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writel(mod, regs + S3C2412_IISMOD);
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}
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fic = readl(regs + S3C2412_IISFIC);
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pr_debug("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
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}
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#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
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/*
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* Wait for the LR signal to allow synchronisation to the L/R clock
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* from the codec. May only be needed for slave mode.
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*/
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static int s3c2412_snd_lrsync(struct s3c_i2sv2_info *i2s)
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{
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u32 iiscon;
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unsigned long loops = msecs_to_loops(5);
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pr_debug("Entered %s\n", __func__);
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while (--loops) {
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iiscon = readl(i2s->regs + S3C2412_IISCON);
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if (iiscon & S3C2412_IISCON_LRINDEX)
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break;
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cpu_relax();
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}
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if (!loops) {
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printk(KERN_ERR "%s: timeout\n", __func__);
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return -ETIMEDOUT;
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}
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return 0;
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}
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/*
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* Set S3C2412 I2S DAI format
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*/
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static int s3c2412_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
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unsigned int fmt)
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{
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struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
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u32 iismod;
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pr_debug("Entered %s\n", __func__);
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iismod = readl(i2s->regs + S3C2412_IISMOD);
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pr_debug("hw_params r: IISMOD: %x \n", iismod);
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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i2s->master = 0;
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iismod |= S3C2412_IISMOD_SLAVE;
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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i2s->master = 1;
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iismod &= ~S3C2412_IISMOD_SLAVE;
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break;
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default:
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pr_err("unknown master/slave format\n");
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return -EINVAL;
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}
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iismod &= ~S3C2412_IISMOD_SDF_MASK;
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_RIGHT_J:
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iismod |= S3C2412_IISMOD_LR_RLOW;
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iismod |= S3C2412_IISMOD_SDF_MSB;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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iismod |= S3C2412_IISMOD_LR_RLOW;
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iismod |= S3C2412_IISMOD_SDF_LSB;
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break;
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case SND_SOC_DAIFMT_I2S:
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iismod &= ~S3C2412_IISMOD_LR_RLOW;
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iismod |= S3C2412_IISMOD_SDF_IIS;
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break;
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default:
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pr_err("Unknown data format\n");
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return -EINVAL;
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}
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writel(iismod, i2s->regs + S3C2412_IISMOD);
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pr_debug("hw_params w: IISMOD: %x \n", iismod);
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return 0;
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}
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static int s3c_i2sv2_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct s3c_i2sv2_info *i2s = to_info(dai);
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struct snd_dmaengine_dai_dma_data *dma_data;
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u32 iismod;
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pr_debug("Entered %s\n", __func__);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dma_data = i2s->dma_playback;
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else
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dma_data = i2s->dma_capture;
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snd_soc_dai_set_dma_data(dai, substream, dma_data);
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/* Working copies of register */
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iismod = readl(i2s->regs + S3C2412_IISMOD);
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pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
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iismod &= ~S3C64XX_IISMOD_BLC_MASK;
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/* Sample size */
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switch (params_width(params)) {
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case 8:
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iismod |= S3C64XX_IISMOD_BLC_8BIT;
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break;
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case 16:
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break;
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case 24:
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iismod |= S3C64XX_IISMOD_BLC_24BIT;
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break;
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}
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writel(iismod, i2s->regs + S3C2412_IISMOD);
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pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
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return 0;
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}
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static int s3c_i2sv2_set_sysclk(struct snd_soc_dai *cpu_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
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u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
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pr_debug("Entered %s\n", __func__);
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pr_debug("%s r: IISMOD: %x\n", __func__, iismod);
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switch (clk_id) {
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case S3C_I2SV2_CLKSRC_PCLK:
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iismod &= ~S3C2412_IISMOD_IMS_SYSMUX;
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break;
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case S3C_I2SV2_CLKSRC_AUDIOBUS:
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iismod |= S3C2412_IISMOD_IMS_SYSMUX;
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break;
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case S3C_I2SV2_CLKSRC_CDCLK:
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/* Error if controller doesn't have the CDCLKCON bit */
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if (!(i2s->feature & S3C_FEATURE_CDCLKCON))
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return -EINVAL;
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switch (dir) {
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case SND_SOC_CLOCK_IN:
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iismod |= S3C64XX_IISMOD_CDCLKCON;
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break;
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case SND_SOC_CLOCK_OUT:
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iismod &= ~S3C64XX_IISMOD_CDCLKCON;
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break;
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default:
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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}
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writel(iismod, i2s->regs + S3C2412_IISMOD);
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pr_debug("%s w: IISMOD: %x\n", __func__, iismod);
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return 0;
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}
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static int s3c2412_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct s3c_i2sv2_info *i2s = to_info(rtd->cpu_dai);
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int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
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unsigned long irqs;
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int ret = 0;
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pr_debug("Entered %s\n", __func__);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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/* On start, ensure that the FIFOs are cleared and reset. */
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writel(capture ? S3C2412_IISFIC_RXFLUSH : S3C2412_IISFIC_TXFLUSH,
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i2s->regs + S3C2412_IISFIC);
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/* clear again, just in case */
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writel(0x0, i2s->regs + S3C2412_IISFIC);
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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if (!i2s->master) {
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ret = s3c2412_snd_lrsync(i2s);
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if (ret)
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goto exit_err;
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}
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local_irq_save(irqs);
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if (capture)
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s3c2412_snd_rxctrl(i2s, 1);
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else
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s3c2412_snd_txctrl(i2s, 1);
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local_irq_restore(irqs);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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local_irq_save(irqs);
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if (capture)
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s3c2412_snd_rxctrl(i2s, 0);
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else
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s3c2412_snd_txctrl(i2s, 0);
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local_irq_restore(irqs);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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exit_err:
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return ret;
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}
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/*
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* Set S3C2412 Clock dividers
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*/
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static int s3c2412_i2s_set_clkdiv(struct snd_soc_dai *cpu_dai,
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int div_id, int div)
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{
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struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
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u32 reg;
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pr_debug("%s(%p, %d, %d)\n", __func__, cpu_dai, div_id, div);
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switch (div_id) {
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case S3C_I2SV2_DIV_BCLK:
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switch (div) {
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case 16:
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div = S3C2412_IISMOD_BCLK_16FS;
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break;
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case 32:
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div = S3C2412_IISMOD_BCLK_32FS;
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break;
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case 24:
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div = S3C2412_IISMOD_BCLK_24FS;
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break;
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case 48:
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div = S3C2412_IISMOD_BCLK_48FS;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
reg = readl(i2s->regs + S3C2412_IISMOD);
|
|
reg &= ~S3C2412_IISMOD_BCLK_MASK;
|
|
writel(reg | div, i2s->regs + S3C2412_IISMOD);
|
|
|
|
pr_debug("%s: MOD=%08x\n", __func__, readl(i2s->regs + S3C2412_IISMOD));
|
|
break;
|
|
|
|
case S3C_I2SV2_DIV_RCLK:
|
|
switch (div) {
|
|
case 256:
|
|
div = S3C2412_IISMOD_RCLK_256FS;
|
|
break;
|
|
|
|
case 384:
|
|
div = S3C2412_IISMOD_RCLK_384FS;
|
|
break;
|
|
|
|
case 512:
|
|
div = S3C2412_IISMOD_RCLK_512FS;
|
|
break;
|
|
|
|
case 768:
|
|
div = S3C2412_IISMOD_RCLK_768FS;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
reg = readl(i2s->regs + S3C2412_IISMOD);
|
|
reg &= ~S3C2412_IISMOD_RCLK_MASK;
|
|
writel(reg | div, i2s->regs + S3C2412_IISMOD);
|
|
pr_debug("%s: MOD=%08x\n", __func__, readl(i2s->regs + S3C2412_IISMOD));
|
|
break;
|
|
|
|
case S3C_I2SV2_DIV_PRESCALER:
|
|
if (div >= 0) {
|
|
writel((div << 8) | S3C2412_IISPSR_PSREN,
|
|
i2s->regs + S3C2412_IISPSR);
|
|
} else {
|
|
writel(0x0, i2s->regs + S3C2412_IISPSR);
|
|
}
|
|
pr_debug("%s: PSR=%08x\n", __func__, readl(i2s->regs + S3C2412_IISPSR));
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_sframes_t s3c2412_i2s_delay(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = to_info(dai);
|
|
u32 reg = readl(i2s->regs + S3C2412_IISFIC);
|
|
snd_pcm_sframes_t delay;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
delay = S3C2412_IISFIC_TXCOUNT(reg);
|
|
else
|
|
delay = S3C2412_IISFIC_RXCOUNT(reg);
|
|
|
|
return delay;
|
|
}
|
|
|
|
struct clk *s3c_i2sv2_get_clock(struct snd_soc_dai *cpu_dai)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
|
|
u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
|
|
|
|
if (iismod & S3C2412_IISMOD_IMS_SYSMUX)
|
|
return i2s->iis_cclk;
|
|
else
|
|
return i2s->iis_pclk;
|
|
}
|
|
EXPORT_SYMBOL_GPL(s3c_i2sv2_get_clock);
|
|
|
|
/* default table of all avaialable root fs divisors */
|
|
static unsigned int iis_fs_tab[] = { 256, 512, 384, 768 };
|
|
|
|
int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,
|
|
unsigned int *fstab,
|
|
unsigned int rate, struct clk *clk)
|
|
{
|
|
unsigned long clkrate = clk_get_rate(clk);
|
|
unsigned int div;
|
|
unsigned int fsclk;
|
|
unsigned int actual;
|
|
unsigned int fs;
|
|
unsigned int fsdiv;
|
|
signed int deviation = 0;
|
|
unsigned int best_fs = 0;
|
|
unsigned int best_div = 0;
|
|
unsigned int best_rate = 0;
|
|
unsigned int best_deviation = INT_MAX;
|
|
|
|
pr_debug("Input clock rate %ldHz\n", clkrate);
|
|
|
|
if (fstab == NULL)
|
|
fstab = iis_fs_tab;
|
|
|
|
for (fs = 0; fs < ARRAY_SIZE(iis_fs_tab); fs++) {
|
|
fsdiv = iis_fs_tab[fs];
|
|
|
|
fsclk = clkrate / fsdiv;
|
|
div = fsclk / rate;
|
|
|
|
if ((fsclk % rate) > (rate / 2))
|
|
div++;
|
|
|
|
if (div <= 1)
|
|
continue;
|
|
|
|
actual = clkrate / (fsdiv * div);
|
|
deviation = actual - rate;
|
|
|
|
printk(KERN_DEBUG "%ufs: div %u => result %u, deviation %d\n",
|
|
fsdiv, div, actual, deviation);
|
|
|
|
deviation = abs(deviation);
|
|
|
|
if (deviation < best_deviation) {
|
|
best_fs = fsdiv;
|
|
best_div = div;
|
|
best_rate = actual;
|
|
best_deviation = deviation;
|
|
}
|
|
|
|
if (deviation == 0)
|
|
break;
|
|
}
|
|
|
|
printk(KERN_DEBUG "best: fs=%u, div=%u, rate=%u\n",
|
|
best_fs, best_div, best_rate);
|
|
|
|
info->fs_div = best_fs;
|
|
info->clk_div = best_div;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(s3c_i2sv2_iis_calc_rate);
|
|
|
|
int s3c_i2sv2_probe(struct snd_soc_dai *dai,
|
|
struct s3c_i2sv2_info *i2s,
|
|
unsigned long base)
|
|
{
|
|
struct device *dev = dai->dev;
|
|
unsigned int iismod;
|
|
|
|
i2s->dev = dev;
|
|
|
|
/* record our i2s structure for later use in the callbacks */
|
|
snd_soc_dai_set_drvdata(dai, i2s);
|
|
|
|
i2s->iis_pclk = clk_get(dev, "iis");
|
|
if (IS_ERR(i2s->iis_pclk)) {
|
|
dev_err(dev, "failed to get iis_clock\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
clk_prepare_enable(i2s->iis_pclk);
|
|
|
|
/* Mark ourselves as in TXRX mode so we can run through our cleanup
|
|
* process without warnings. */
|
|
iismod = readl(i2s->regs + S3C2412_IISMOD);
|
|
iismod |= S3C2412_IISMOD_MODE_TXRX;
|
|
writel(iismod, i2s->regs + S3C2412_IISMOD);
|
|
s3c2412_snd_txctrl(i2s, 0);
|
|
s3c2412_snd_rxctrl(i2s, 0);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(s3c_i2sv2_probe);
|
|
|
|
void s3c_i2sv2_cleanup(struct snd_soc_dai *dai,
|
|
struct s3c_i2sv2_info *i2s)
|
|
{
|
|
clk_disable_unprepare(i2s->iis_pclk);
|
|
clk_put(i2s->iis_pclk);
|
|
i2s->iis_pclk = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(s3c_i2sv2_cleanup);
|
|
|
|
#ifdef CONFIG_PM
|
|
static int s3c2412_i2s_suspend(struct snd_soc_dai *dai)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = to_info(dai);
|
|
u32 iismod;
|
|
|
|
if (dai->active) {
|
|
i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD);
|
|
i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON);
|
|
i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR);
|
|
|
|
/* some basic suspend checks */
|
|
|
|
iismod = readl(i2s->regs + S3C2412_IISMOD);
|
|
|
|
if (iismod & S3C2412_IISCON_RXDMA_ACTIVE)
|
|
pr_warning("%s: RXDMA active?\n", __func__);
|
|
|
|
if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
|
|
pr_warning("%s: TXDMA active?\n", __func__);
|
|
|
|
if (iismod & S3C2412_IISCON_IIS_ACTIVE)
|
|
pr_warning("%s: IIS active\n", __func__);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2412_i2s_resume(struct snd_soc_dai *dai)
|
|
{
|
|
struct s3c_i2sv2_info *i2s = to_info(dai);
|
|
|
|
pr_info("dai_active %d, IISMOD %08x, IISCON %08x\n",
|
|
dai->active, i2s->suspend_iismod, i2s->suspend_iiscon);
|
|
|
|
if (dai->active) {
|
|
writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON);
|
|
writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD);
|
|
writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR);
|
|
|
|
writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH,
|
|
i2s->regs + S3C2412_IISFIC);
|
|
|
|
ndelay(250);
|
|
writel(0x0, i2s->regs + S3C2412_IISFIC);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define s3c2412_i2s_suspend NULL
|
|
#define s3c2412_i2s_resume NULL
|
|
#endif
|
|
|
|
int s3c_i2sv2_register_component(struct device *dev, int id,
|
|
const struct snd_soc_component_driver *cmp_drv,
|
|
struct snd_soc_dai_driver *dai_drv)
|
|
{
|
|
struct snd_soc_dai_ops *ops = (struct snd_soc_dai_ops *)dai_drv->ops;
|
|
|
|
ops->trigger = s3c2412_i2s_trigger;
|
|
if (!ops->hw_params)
|
|
ops->hw_params = s3c_i2sv2_hw_params;
|
|
ops->set_fmt = s3c2412_i2s_set_fmt;
|
|
ops->set_clkdiv = s3c2412_i2s_set_clkdiv;
|
|
ops->set_sysclk = s3c_i2sv2_set_sysclk;
|
|
|
|
/* Allow overriding by (for example) IISv4 */
|
|
if (!ops->delay)
|
|
ops->delay = s3c2412_i2s_delay;
|
|
|
|
dai_drv->suspend = s3c2412_i2s_suspend;
|
|
dai_drv->resume = s3c2412_i2s_resume;
|
|
|
|
return devm_snd_soc_register_component(dev, cmp_drv, dai_drv, 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(s3c_i2sv2_register_component);
|
|
|
|
MODULE_LICENSE("GPL");
|