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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/ti/omap-mcbsp.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/ti/omap-mcbsp.c')
-rw-r--r--sound/soc/ti/omap-mcbsp.c1443
1 files changed, 1443 insertions, 0 deletions
diff --git a/sound/soc/ti/omap-mcbsp.c b/sound/soc/ti/omap-mcbsp.c
new file mode 100644
index 0000000000..b399d86f22
--- /dev/null
+++ b/sound/soc/ti/omap-mcbsp.c
@@ -0,0 +1,1443 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * omap-mcbsp.c -- OMAP ALSA SoC DAI driver using McBSP port
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
+ * Peter Ujfalusi <peter.ujfalusi@ti.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "omap-mcbsp-priv.h"
+#include "omap-mcbsp.h"
+#include "sdma-pcm.h"
+
+#define OMAP_MCBSP_RATES (SNDRV_PCM_RATE_8000_96000)
+
+enum {
+ OMAP_MCBSP_WORD_8 = 0,
+ OMAP_MCBSP_WORD_12,
+ OMAP_MCBSP_WORD_16,
+ OMAP_MCBSP_WORD_20,
+ OMAP_MCBSP_WORD_24,
+ OMAP_MCBSP_WORD_32,
+};
+
+static void omap_mcbsp_dump_reg(struct omap_mcbsp *mcbsp)
+{
+ dev_dbg(mcbsp->dev, "**** McBSP%d regs ****\n", mcbsp->id);
+ dev_dbg(mcbsp->dev, "DRR2: 0x%04x\n", MCBSP_READ(mcbsp, DRR2));
+ dev_dbg(mcbsp->dev, "DRR1: 0x%04x\n", MCBSP_READ(mcbsp, DRR1));
+ dev_dbg(mcbsp->dev, "DXR2: 0x%04x\n", MCBSP_READ(mcbsp, DXR2));
+ dev_dbg(mcbsp->dev, "DXR1: 0x%04x\n", MCBSP_READ(mcbsp, DXR1));
+ dev_dbg(mcbsp->dev, "SPCR2: 0x%04x\n", MCBSP_READ(mcbsp, SPCR2));
+ dev_dbg(mcbsp->dev, "SPCR1: 0x%04x\n", MCBSP_READ(mcbsp, SPCR1));
+ dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n", MCBSP_READ(mcbsp, RCR2));
+ dev_dbg(mcbsp->dev, "RCR1: 0x%04x\n", MCBSP_READ(mcbsp, RCR1));
+ dev_dbg(mcbsp->dev, "XCR2: 0x%04x\n", MCBSP_READ(mcbsp, XCR2));
+ dev_dbg(mcbsp->dev, "XCR1: 0x%04x\n", MCBSP_READ(mcbsp, XCR1));
+ dev_dbg(mcbsp->dev, "SRGR2: 0x%04x\n", MCBSP_READ(mcbsp, SRGR2));
+ dev_dbg(mcbsp->dev, "SRGR1: 0x%04x\n", MCBSP_READ(mcbsp, SRGR1));
+ dev_dbg(mcbsp->dev, "PCR0: 0x%04x\n", MCBSP_READ(mcbsp, PCR0));
+ dev_dbg(mcbsp->dev, "***********************\n");
+}
+
+static int omap2_mcbsp_set_clks_src(struct omap_mcbsp *mcbsp, u8 fck_src_id)
+{
+ struct clk *fck_src;
+ const char *src;
+ int r;
+
+ if (fck_src_id == MCBSP_CLKS_PAD_SRC)
+ src = "pad_fck";
+ else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
+ src = "prcm_fck";
+ else
+ return -EINVAL;
+
+ fck_src = clk_get(mcbsp->dev, src);
+ if (IS_ERR(fck_src)) {
+ dev_info(mcbsp->dev, "CLKS: could not clk_get() %s\n", src);
+ return 0;
+ }
+
+ if (mcbsp->active)
+ pm_runtime_put_sync(mcbsp->dev);
+
+ r = clk_set_parent(mcbsp->fclk, fck_src);
+ if (r)
+ dev_err(mcbsp->dev, "CLKS: could not clk_set_parent() to %s\n",
+ src);
+
+ if (mcbsp->active)
+ pm_runtime_get_sync(mcbsp->dev);
+
+ clk_put(fck_src);
+
+ return r;
+}
+
+static irqreturn_t omap_mcbsp_irq_handler(int irq, void *data)
+{
+ struct omap_mcbsp *mcbsp = data;
+ u16 irqst;
+
+ irqst = MCBSP_READ(mcbsp, IRQST);
+ dev_dbg(mcbsp->dev, "IRQ callback : 0x%x\n", irqst);
+
+ if (irqst & RSYNCERREN)
+ dev_err(mcbsp->dev, "RX Frame Sync Error!\n");
+ if (irqst & RFSREN)
+ dev_dbg(mcbsp->dev, "RX Frame Sync\n");
+ if (irqst & REOFEN)
+ dev_dbg(mcbsp->dev, "RX End Of Frame\n");
+ if (irqst & RRDYEN)
+ dev_dbg(mcbsp->dev, "RX Buffer Threshold Reached\n");
+ if (irqst & RUNDFLEN)
+ dev_err(mcbsp->dev, "RX Buffer Underflow!\n");
+ if (irqst & ROVFLEN)
+ dev_err(mcbsp->dev, "RX Buffer Overflow!\n");
+
+ if (irqst & XSYNCERREN)
+ dev_err(mcbsp->dev, "TX Frame Sync Error!\n");
+ if (irqst & XFSXEN)
+ dev_dbg(mcbsp->dev, "TX Frame Sync\n");
+ if (irqst & XEOFEN)
+ dev_dbg(mcbsp->dev, "TX End Of Frame\n");
+ if (irqst & XRDYEN)
+ dev_dbg(mcbsp->dev, "TX Buffer threshold Reached\n");
+ if (irqst & XUNDFLEN)
+ dev_err(mcbsp->dev, "TX Buffer Underflow!\n");
+ if (irqst & XOVFLEN)
+ dev_err(mcbsp->dev, "TX Buffer Overflow!\n");
+ if (irqst & XEMPTYEOFEN)
+ dev_dbg(mcbsp->dev, "TX Buffer empty at end of frame\n");
+
+ MCBSP_WRITE(mcbsp, IRQST, irqst);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *data)
+{
+ struct omap_mcbsp *mcbsp = data;
+ u16 irqst_spcr2;
+
+ irqst_spcr2 = MCBSP_READ(mcbsp, SPCR2);
+ dev_dbg(mcbsp->dev, "TX IRQ callback : 0x%x\n", irqst_spcr2);
+
+ if (irqst_spcr2 & XSYNC_ERR) {
+ dev_err(mcbsp->dev, "TX Frame Sync Error! : 0x%x\n",
+ irqst_spcr2);
+ /* Writing zero to XSYNC_ERR clears the IRQ */
+ MCBSP_WRITE(mcbsp, SPCR2, MCBSP_READ_CACHE(mcbsp, SPCR2));
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *data)
+{
+ struct omap_mcbsp *mcbsp = data;
+ u16 irqst_spcr1;
+
+ irqst_spcr1 = MCBSP_READ(mcbsp, SPCR1);
+ dev_dbg(mcbsp->dev, "RX IRQ callback : 0x%x\n", irqst_spcr1);
+
+ if (irqst_spcr1 & RSYNC_ERR) {
+ dev_err(mcbsp->dev, "RX Frame Sync Error! : 0x%x\n",
+ irqst_spcr1);
+ /* Writing zero to RSYNC_ERR clears the IRQ */
+ MCBSP_WRITE(mcbsp, SPCR1, MCBSP_READ_CACHE(mcbsp, SPCR1));
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * omap_mcbsp_config simply write a config to the
+ * appropriate McBSP.
+ * You either call this function or set the McBSP registers
+ * by yourself before calling omap_mcbsp_start().
+ */
+static void omap_mcbsp_config(struct omap_mcbsp *mcbsp,
+ const struct omap_mcbsp_reg_cfg *config)
+{
+ dev_dbg(mcbsp->dev, "Configuring McBSP%d phys_base: 0x%08lx\n",
+ mcbsp->id, mcbsp->phys_base);
+
+ /* We write the given config */
+ MCBSP_WRITE(mcbsp, SPCR2, config->spcr2);
+ MCBSP_WRITE(mcbsp, SPCR1, config->spcr1);
+ MCBSP_WRITE(mcbsp, RCR2, config->rcr2);
+ MCBSP_WRITE(mcbsp, RCR1, config->rcr1);
+ MCBSP_WRITE(mcbsp, XCR2, config->xcr2);
+ MCBSP_WRITE(mcbsp, XCR1, config->xcr1);
+ MCBSP_WRITE(mcbsp, SRGR2, config->srgr2);
+ MCBSP_WRITE(mcbsp, SRGR1, config->srgr1);
+ MCBSP_WRITE(mcbsp, MCR2, config->mcr2);
+ MCBSP_WRITE(mcbsp, MCR1, config->mcr1);
+ MCBSP_WRITE(mcbsp, PCR0, config->pcr0);
+ if (mcbsp->pdata->has_ccr) {
+ MCBSP_WRITE(mcbsp, XCCR, config->xccr);
+ MCBSP_WRITE(mcbsp, RCCR, config->rccr);
+ }
+ /* Enable wakeup behavior */
+ if (mcbsp->pdata->has_wakeup)
+ MCBSP_WRITE(mcbsp, WAKEUPEN, XRDYEN | RRDYEN);
+
+ /* Enable TX/RX sync error interrupts by default */
+ if (mcbsp->irq)
+ MCBSP_WRITE(mcbsp, IRQEN, RSYNCERREN | XSYNCERREN |
+ RUNDFLEN | ROVFLEN | XUNDFLEN | XOVFLEN);
+}
+
+/**
+ * omap_mcbsp_dma_reg_params - returns the address of mcbsp data register
+ * @mcbsp: omap_mcbsp struct for the McBSP instance
+ * @stream: Stream direction (playback/capture)
+ *
+ * Returns the address of mcbsp data transmit register or data receive register
+ * to be used by DMA for transferring/receiving data
+ */
+static int omap_mcbsp_dma_reg_params(struct omap_mcbsp *mcbsp,
+ unsigned int stream)
+{
+ int data_reg;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (mcbsp->pdata->reg_size == 2)
+ data_reg = OMAP_MCBSP_REG_DXR1;
+ else
+ data_reg = OMAP_MCBSP_REG_DXR;
+ } else {
+ if (mcbsp->pdata->reg_size == 2)
+ data_reg = OMAP_MCBSP_REG_DRR1;
+ else
+ data_reg = OMAP_MCBSP_REG_DRR;
+ }
+
+ return mcbsp->phys_dma_base + data_reg * mcbsp->pdata->reg_step;
+}
+
+/*
+ * omap_mcbsp_set_rx_threshold configures the transmit threshold in words.
+ * The threshold parameter is 1 based, and it is converted (threshold - 1)
+ * for the THRSH2 register.
+ */
+static void omap_mcbsp_set_tx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
+{
+ if (threshold && threshold <= mcbsp->max_tx_thres)
+ MCBSP_WRITE(mcbsp, THRSH2, threshold - 1);
+}
+
+/*
+ * omap_mcbsp_set_rx_threshold configures the receive threshold in words.
+ * The threshold parameter is 1 based, and it is converted (threshold - 1)
+ * for the THRSH1 register.
+ */
+static void omap_mcbsp_set_rx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
+{
+ if (threshold && threshold <= mcbsp->max_rx_thres)
+ MCBSP_WRITE(mcbsp, THRSH1, threshold - 1);
+}
+
+/*
+ * omap_mcbsp_get_tx_delay returns the number of used slots in the McBSP FIFO
+ */
+static u16 omap_mcbsp_get_tx_delay(struct omap_mcbsp *mcbsp)
+{
+ u16 buffstat;
+
+ /* Returns the number of free locations in the buffer */
+ buffstat = MCBSP_READ(mcbsp, XBUFFSTAT);
+
+ /* Number of slots are different in McBSP ports */
+ return mcbsp->pdata->buffer_size - buffstat;
+}
+
+/*
+ * omap_mcbsp_get_rx_delay returns the number of free slots in the McBSP FIFO
+ * to reach the threshold value (when the DMA will be triggered to read it)
+ */
+static u16 omap_mcbsp_get_rx_delay(struct omap_mcbsp *mcbsp)
+{
+ u16 buffstat, threshold;
+
+ /* Returns the number of used locations in the buffer */
+ buffstat = MCBSP_READ(mcbsp, RBUFFSTAT);
+ /* RX threshold */
+ threshold = MCBSP_READ(mcbsp, THRSH1);
+
+ /* Return the number of location till we reach the threshold limit */
+ if (threshold <= buffstat)
+ return 0;
+ else
+ return threshold - buffstat;
+}
+
+static int omap_mcbsp_request(struct omap_mcbsp *mcbsp)
+{
+ void *reg_cache;
+ int err;
+
+ reg_cache = kzalloc(mcbsp->reg_cache_size, GFP_KERNEL);
+ if (!reg_cache)
+ return -ENOMEM;
+
+ spin_lock(&mcbsp->lock);
+ if (!mcbsp->free) {
+ dev_err(mcbsp->dev, "McBSP%d is currently in use\n", mcbsp->id);
+ err = -EBUSY;
+ goto err_kfree;
+ }
+
+ mcbsp->free = false;
+ mcbsp->reg_cache = reg_cache;
+ spin_unlock(&mcbsp->lock);
+
+ if(mcbsp->pdata->ops && mcbsp->pdata->ops->request)
+ mcbsp->pdata->ops->request(mcbsp->id - 1);
+
+ /*
+ * Make sure that transmitter, receiver and sample-rate generator are
+ * not running before activating IRQs.
+ */
+ MCBSP_WRITE(mcbsp, SPCR1, 0);
+ MCBSP_WRITE(mcbsp, SPCR2, 0);
+
+ if (mcbsp->irq) {
+ err = request_irq(mcbsp->irq, omap_mcbsp_irq_handler, 0,
+ "McBSP", (void *)mcbsp);
+ if (err != 0) {
+ dev_err(mcbsp->dev, "Unable to request IRQ\n");
+ goto err_clk_disable;
+ }
+ } else {
+ err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, 0,
+ "McBSP TX", (void *)mcbsp);
+ if (err != 0) {
+ dev_err(mcbsp->dev, "Unable to request TX IRQ\n");
+ goto err_clk_disable;
+ }
+
+ err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, 0,
+ "McBSP RX", (void *)mcbsp);
+ if (err != 0) {
+ dev_err(mcbsp->dev, "Unable to request RX IRQ\n");
+ goto err_free_irq;
+ }
+ }
+
+ return 0;
+err_free_irq:
+ free_irq(mcbsp->tx_irq, (void *)mcbsp);
+err_clk_disable:
+ if(mcbsp->pdata->ops && mcbsp->pdata->ops->free)
+ mcbsp->pdata->ops->free(mcbsp->id - 1);
+
+ /* Disable wakeup behavior */
+ if (mcbsp->pdata->has_wakeup)
+ MCBSP_WRITE(mcbsp, WAKEUPEN, 0);
+
+ spin_lock(&mcbsp->lock);
+ mcbsp->free = true;
+ mcbsp->reg_cache = NULL;
+err_kfree:
+ spin_unlock(&mcbsp->lock);
+ kfree(reg_cache);
+
+ return err;
+}
+
+static void omap_mcbsp_free(struct omap_mcbsp *mcbsp)
+{
+ void *reg_cache;
+
+ if(mcbsp->pdata->ops && mcbsp->pdata->ops->free)
+ mcbsp->pdata->ops->free(mcbsp->id - 1);
+
+ /* Disable wakeup behavior */
+ if (mcbsp->pdata->has_wakeup)
+ MCBSP_WRITE(mcbsp, WAKEUPEN, 0);
+
+ /* Disable interrupt requests */
+ if (mcbsp->irq) {
+ MCBSP_WRITE(mcbsp, IRQEN, 0);
+
+ free_irq(mcbsp->irq, (void *)mcbsp);
+ } else {
+ free_irq(mcbsp->rx_irq, (void *)mcbsp);
+ free_irq(mcbsp->tx_irq, (void *)mcbsp);
+ }
+
+ reg_cache = mcbsp->reg_cache;
+
+ /*
+ * Select CLKS source from internal source unconditionally before
+ * marking the McBSP port as free.
+ * If the external clock source via MCBSP_CLKS pin has been selected the
+ * system will refuse to enter idle if the CLKS pin source is not reset
+ * back to internal source.
+ */
+ if (!mcbsp_omap1())
+ omap2_mcbsp_set_clks_src(mcbsp, MCBSP_CLKS_PRCM_SRC);
+
+ spin_lock(&mcbsp->lock);
+ if (mcbsp->free)
+ dev_err(mcbsp->dev, "McBSP%d was not reserved\n", mcbsp->id);
+ else
+ mcbsp->free = true;
+ mcbsp->reg_cache = NULL;
+ spin_unlock(&mcbsp->lock);
+
+ kfree(reg_cache);
+}
+
+/*
+ * Here we start the McBSP, by enabling transmitter, receiver or both.
+ * If no transmitter or receiver is active prior calling, then sample-rate
+ * generator and frame sync are started.
+ */
+static void omap_mcbsp_start(struct omap_mcbsp *mcbsp, int stream)
+{
+ int tx = (stream == SNDRV_PCM_STREAM_PLAYBACK);
+ int rx = !tx;
+ int enable_srg = 0;
+ u16 w;
+
+ if (mcbsp->st_data)
+ omap_mcbsp_st_start(mcbsp);
+
+ /* Only enable SRG, if McBSP is master */
+ w = MCBSP_READ_CACHE(mcbsp, PCR0);
+ if (w & (FSXM | FSRM | CLKXM | CLKRM))
+ enable_srg = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
+ MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
+
+ if (enable_srg) {
+ /* Start the sample generator */
+ w = MCBSP_READ_CACHE(mcbsp, SPCR2);
+ MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 6));
+ }
+
+ /* Enable transmitter and receiver */
+ tx &= 1;
+ w = MCBSP_READ_CACHE(mcbsp, SPCR2);
+ MCBSP_WRITE(mcbsp, SPCR2, w | tx);
+
+ rx &= 1;
+ w = MCBSP_READ_CACHE(mcbsp, SPCR1);
+ MCBSP_WRITE(mcbsp, SPCR1, w | rx);
+
+ /*
+ * Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec
+ * REVISIT: 100us may give enough time for two CLKSRG, however
+ * due to some unknown PM related, clock gating etc. reason it
+ * is now at 500us.
+ */
+ udelay(500);
+
+ if (enable_srg) {
+ /* Start frame sync */
+ w = MCBSP_READ_CACHE(mcbsp, SPCR2);
+ MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 7));
+ }
+
+ if (mcbsp->pdata->has_ccr) {
+ /* Release the transmitter and receiver */
+ w = MCBSP_READ_CACHE(mcbsp, XCCR);
+ w &= ~(tx ? XDISABLE : 0);
+ MCBSP_WRITE(mcbsp, XCCR, w);
+ w = MCBSP_READ_CACHE(mcbsp, RCCR);
+ w &= ~(rx ? RDISABLE : 0);
+ MCBSP_WRITE(mcbsp, RCCR, w);
+ }
+
+ /* Dump McBSP Regs */
+ omap_mcbsp_dump_reg(mcbsp);
+}
+
+static void omap_mcbsp_stop(struct omap_mcbsp *mcbsp, int stream)
+{
+ int tx = (stream == SNDRV_PCM_STREAM_PLAYBACK);
+ int rx = !tx;
+ int idle;
+ u16 w;
+
+ /* Reset transmitter */
+ tx &= 1;
+ if (mcbsp->pdata->has_ccr) {
+ w = MCBSP_READ_CACHE(mcbsp, XCCR);
+ w |= (tx ? XDISABLE : 0);
+ MCBSP_WRITE(mcbsp, XCCR, w);
+ }
+ w = MCBSP_READ_CACHE(mcbsp, SPCR2);
+ MCBSP_WRITE(mcbsp, SPCR2, w & ~tx);
+
+ /* Reset receiver */
+ rx &= 1;
+ if (mcbsp->pdata->has_ccr) {
+ w = MCBSP_READ_CACHE(mcbsp, RCCR);
+ w |= (rx ? RDISABLE : 0);
+ MCBSP_WRITE(mcbsp, RCCR, w);
+ }
+ w = MCBSP_READ_CACHE(mcbsp, SPCR1);
+ MCBSP_WRITE(mcbsp, SPCR1, w & ~rx);
+
+ idle = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
+ MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
+
+ if (idle) {
+ /* Reset the sample rate generator */
+ w = MCBSP_READ_CACHE(mcbsp, SPCR2);
+ MCBSP_WRITE(mcbsp, SPCR2, w & ~(1 << 6));
+ }
+
+ if (mcbsp->st_data)
+ omap_mcbsp_st_stop(mcbsp);
+}
+
+#define max_thres(m) (mcbsp->pdata->buffer_size)
+#define valid_threshold(m, val) ((val) <= max_thres(m))
+#define THRESHOLD_PROP_BUILDER(prop) \
+static ssize_t prop##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \
+ \
+ return sysfs_emit(buf, "%u\n", mcbsp->prop); \
+} \
+ \
+static ssize_t prop##_store(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t size) \
+{ \
+ struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \
+ unsigned long val; \
+ int status; \
+ \
+ status = kstrtoul(buf, 0, &val); \
+ if (status) \
+ return status; \
+ \
+ if (!valid_threshold(mcbsp, val)) \
+ return -EDOM; \
+ \
+ mcbsp->prop = val; \
+ return size; \
+} \
+ \
+static DEVICE_ATTR_RW(prop)
+
+THRESHOLD_PROP_BUILDER(max_tx_thres);
+THRESHOLD_PROP_BUILDER(max_rx_thres);
+
+static const char * const dma_op_modes[] = {
+ "element", "threshold",
+};
+
+static ssize_t dma_op_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
+ int dma_op_mode, i = 0;
+ ssize_t len = 0;
+ const char * const *s;
+
+ dma_op_mode = mcbsp->dma_op_mode;
+
+ for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) {
+ if (dma_op_mode == i)
+ len += sysfs_emit_at(buf, len, "[%s] ", *s);
+ else
+ len += sysfs_emit_at(buf, len, "%s ", *s);
+ }
+ len += sysfs_emit_at(buf, len, "\n");
+
+ return len;
+}
+
+static ssize_t dma_op_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
+ int i;
+
+ i = sysfs_match_string(dma_op_modes, buf);
+ if (i < 0)
+ return i;
+
+ spin_lock_irq(&mcbsp->lock);
+ if (!mcbsp->free) {
+ size = -EBUSY;
+ goto unlock;
+ }
+ mcbsp->dma_op_mode = i;
+
+unlock:
+ spin_unlock_irq(&mcbsp->lock);
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(dma_op_mode);
+
+static const struct attribute *additional_attrs[] = {
+ &dev_attr_max_tx_thres.attr,
+ &dev_attr_max_rx_thres.attr,
+ &dev_attr_dma_op_mode.attr,
+ NULL,
+};
+
+static const struct attribute_group additional_attr_group = {
+ .attrs = (struct attribute **)additional_attrs,
+};
+
+/*
+ * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
+ * 730 has only 2 McBSP, and both of them are MPU peripherals.
+ */
+static int omap_mcbsp_init(struct platform_device *pdev)
+{
+ struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
+ struct resource *res;
+ int ret;
+
+ spin_lock_init(&mcbsp->lock);
+ mcbsp->free = true;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
+ if (!res)
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ mcbsp->io_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mcbsp->io_base))
+ return PTR_ERR(mcbsp->io_base);
+
+ mcbsp->phys_base = res->start;
+ mcbsp->reg_cache_size = resource_size(res);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
+ if (!res)
+ mcbsp->phys_dma_base = mcbsp->phys_base;
+ else
+ mcbsp->phys_dma_base = res->start;
+
+ /*
+ * OMAP1, 2 uses two interrupt lines: TX, RX
+ * OMAP2430, OMAP3 SoC have combined IRQ line as well.
+ * OMAP4 and newer SoC only have the combined IRQ line.
+ * Use the combined IRQ if available since it gives better debugging
+ * possibilities.
+ */
+ mcbsp->irq = platform_get_irq_byname(pdev, "common");
+ if (mcbsp->irq == -ENXIO) {
+ mcbsp->tx_irq = platform_get_irq_byname(pdev, "tx");
+
+ if (mcbsp->tx_irq == -ENXIO) {
+ mcbsp->irq = platform_get_irq(pdev, 0);
+ mcbsp->tx_irq = 0;
+ } else {
+ mcbsp->rx_irq = platform_get_irq_byname(pdev, "rx");
+ mcbsp->irq = 0;
+ }
+ }
+
+ if (!pdev->dev.of_node) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
+ if (!res) {
+ dev_err(&pdev->dev, "invalid tx DMA channel\n");
+ return -ENODEV;
+ }
+ mcbsp->dma_req[0] = res->start;
+ mcbsp->dma_data[0].filter_data = &mcbsp->dma_req[0];
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
+ if (!res) {
+ dev_err(&pdev->dev, "invalid rx DMA channel\n");
+ return -ENODEV;
+ }
+ mcbsp->dma_req[1] = res->start;
+ mcbsp->dma_data[1].filter_data = &mcbsp->dma_req[1];
+ } else {
+ mcbsp->dma_data[0].filter_data = "tx";
+ mcbsp->dma_data[1].filter_data = "rx";
+ }
+
+ mcbsp->dma_data[0].addr = omap_mcbsp_dma_reg_params(mcbsp,
+ SNDRV_PCM_STREAM_PLAYBACK);
+ mcbsp->dma_data[1].addr = omap_mcbsp_dma_reg_params(mcbsp,
+ SNDRV_PCM_STREAM_CAPTURE);
+
+ mcbsp->fclk = devm_clk_get(&pdev->dev, "fck");
+ if (IS_ERR(mcbsp->fclk)) {
+ ret = PTR_ERR(mcbsp->fclk);
+ dev_err(mcbsp->dev, "unable to get fck: %d\n", ret);
+ return ret;
+ }
+
+ mcbsp->dma_op_mode = MCBSP_DMA_MODE_ELEMENT;
+ if (mcbsp->pdata->buffer_size) {
+ /*
+ * Initially configure the maximum thresholds to a safe value.
+ * The McBSP FIFO usage with these values should not go under
+ * 16 locations.
+ * If the whole FIFO without safety buffer is used, than there
+ * is a possibility that the DMA will be not able to push the
+ * new data on time, causing channel shifts in runtime.
+ */
+ mcbsp->max_tx_thres = max_thres(mcbsp) - 0x10;
+ mcbsp->max_rx_thres = max_thres(mcbsp) - 0x10;
+
+ ret = devm_device_add_group(mcbsp->dev, &additional_attr_group);
+ if (ret) {
+ dev_err(mcbsp->dev,
+ "Unable to create additional controls\n");
+ return ret;
+ }
+ }
+
+ return omap_mcbsp_st_init(pdev);
+}
+
+/*
+ * Stream DMA parameters. DMA request line and port address are set runtime
+ * since they are different between OMAP1 and later OMAPs
+ */
+static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream,
+ unsigned int packet_size)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ int words;
+
+ /* No need to proceed further if McBSP does not have FIFO */
+ if (mcbsp->pdata->buffer_size == 0)
+ return;
+
+ /*
+ * Configure McBSP threshold based on either:
+ * packet_size, when the sDMA is in packet mode, or based on the
+ * period size in THRESHOLD mode, otherwise use McBSP threshold = 1
+ * for mono streams.
+ */
+ if (packet_size)
+ words = packet_size;
+ else
+ words = 1;
+
+ /* Configure McBSP internal buffer usage */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ omap_mcbsp_set_tx_threshold(mcbsp, words);
+ else
+ omap_mcbsp_set_rx_threshold(mcbsp, words);
+}
+
+static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_interval *buffer_size = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_BUFFER_SIZE);
+ struct snd_interval *channels = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_CHANNELS);
+ struct omap_mcbsp *mcbsp = rule->private;
+ struct snd_interval frames;
+ int size;
+
+ snd_interval_any(&frames);
+ size = mcbsp->pdata->buffer_size;
+
+ frames.min = size / channels->min;
+ frames.integer = 1;
+ return snd_interval_refine(buffer_size, &frames);
+}
+
+static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ int err = 0;
+
+ if (!snd_soc_dai_active(cpu_dai))
+ err = omap_mcbsp_request(mcbsp);
+
+ /*
+ * OMAP3 McBSP FIFO is word structured.
+ * McBSP2 has 1024 + 256 = 1280 word long buffer,
+ * McBSP1,3,4,5 has 128 word long buffer
+ * This means that the size of the FIFO depends on the sample format.
+ * For example on McBSP3:
+ * 16bit samples: size is 128 * 2 = 256 bytes
+ * 32bit samples: size is 128 * 4 = 512 bytes
+ * It is simpler to place constraint for buffer and period based on
+ * channels.
+ * McBSP3 as example again (16 or 32 bit samples):
+ * 1 channel (mono): size is 128 frames (128 words)
+ * 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
+ * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
+ */
+ if (mcbsp->pdata->buffer_size) {
+ /*
+ * Rule for the buffer size. We should not allow
+ * smaller buffer than the FIFO size to avoid underruns.
+ * This applies only for the playback stream.
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+ omap_mcbsp_hwrule_min_buffersize,
+ mcbsp,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+
+ /* Make sure, that the period size is always even */
+ snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
+ }
+
+ return err;
+}
+
+static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+ int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+
+ if (mcbsp->latency[stream2])
+ cpu_latency_qos_update_request(&mcbsp->pm_qos_req,
+ mcbsp->latency[stream2]);
+ else if (mcbsp->latency[stream1])
+ cpu_latency_qos_remove_request(&mcbsp->pm_qos_req);
+
+ mcbsp->latency[stream1] = 0;
+
+ if (!snd_soc_dai_active(cpu_dai)) {
+ omap_mcbsp_free(mcbsp);
+ mcbsp->configured = 0;
+ }
+}
+
+static int omap_mcbsp_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ struct pm_qos_request *pm_qos_req = &mcbsp->pm_qos_req;
+ int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+ int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+ int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+ int latency = mcbsp->latency[stream2];
+
+ /* Prevent omap hardware from hitting off between FIFO fills */
+ if (!latency || mcbsp->latency[stream1] < latency)
+ latency = mcbsp->latency[stream1];
+
+ if (cpu_latency_qos_request_active(pm_qos_req))
+ cpu_latency_qos_update_request(pm_qos_req, latency);
+ else if (latency)
+ cpu_latency_qos_add_request(pm_qos_req, latency);
+
+ return 0;
+}
+
+static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ mcbsp->active++;
+ omap_mcbsp_start(mcbsp, substream->stream);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ omap_mcbsp_stop(mcbsp, substream->stream);
+ mcbsp->active--;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static snd_pcm_sframes_t omap_mcbsp_dai_delay(
+ struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ u16 fifo_use;
+ snd_pcm_sframes_t delay;
+
+ /* No need to proceed further if McBSP does not have FIFO */
+ if (mcbsp->pdata->buffer_size == 0)
+ return 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ fifo_use = omap_mcbsp_get_tx_delay(mcbsp);
+ else
+ fifo_use = omap_mcbsp_get_rx_delay(mcbsp);
+
+ /*
+ * Divide the used locations with the channel count to get the
+ * FIFO usage in samples (don't care about partial samples in the
+ * buffer).
+ */
+ delay = fifo_use / substream->runtime->channels;
+
+ return delay;
+}
+
+static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+ int wlen, channels, wpf;
+ int pkt_size = 0;
+ unsigned int format, div, framesize, master;
+ unsigned int buffer_size = mcbsp->pdata->buffer_size;
+
+ dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
+ channels = params_channels(params);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ wlen = 16;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ wlen = 32;
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (buffer_size) {
+ int latency;
+
+ if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {
+ int period_words, max_thrsh;
+ int divider = 0;
+
+ period_words = params_period_bytes(params) / (wlen / 8);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ max_thrsh = mcbsp->max_tx_thres;
+ else
+ max_thrsh = mcbsp->max_rx_thres;
+ /*
+ * Use sDMA packet mode if McBSP is in threshold mode:
+ * If period words less than the FIFO size the packet
+ * size is set to the number of period words, otherwise
+ * Look for the biggest threshold value which divides
+ * the period size evenly.
+ */
+ divider = period_words / max_thrsh;
+ if (period_words % max_thrsh)
+ divider++;
+ while (period_words % divider &&
+ divider < period_words)
+ divider++;
+ if (divider == period_words)
+ return -EINVAL;
+
+ pkt_size = period_words / divider;
+ } else if (channels > 1) {
+ /* Use packet mode for non mono streams */
+ pkt_size = channels;
+ }
+
+ latency = (buffer_size - pkt_size) / channels;
+ latency = latency * USEC_PER_SEC /
+ (params->rate_num / params->rate_den);
+ mcbsp->latency[substream->stream] = latency;
+
+ omap_mcbsp_set_threshold(substream, pkt_size);
+ }
+
+ dma_data->maxburst = pkt_size;
+
+ if (mcbsp->configured) {
+ /* McBSP already configured by another stream */
+ return 0;
+ }
+
+ regs->rcr2 &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7));
+ regs->xcr2 &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7));
+ regs->rcr1 &= ~(RFRLEN1(0x7f) | RWDLEN1(7));
+ regs->xcr1 &= ~(XFRLEN1(0x7f) | XWDLEN1(7));
+ format = mcbsp->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ wpf = channels;
+ if (channels == 2 && (format == SND_SOC_DAIFMT_I2S ||
+ format == SND_SOC_DAIFMT_LEFT_J)) {
+ /* Use dual-phase frames */
+ regs->rcr2 |= RPHASE;
+ regs->xcr2 |= XPHASE;
+ /* Set 1 word per (McBSP) frame for phase1 and phase2 */
+ wpf--;
+ regs->rcr2 |= RFRLEN2(wpf - 1);
+ regs->xcr2 |= XFRLEN2(wpf - 1);
+ }
+
+ regs->rcr1 |= RFRLEN1(wpf - 1);
+ regs->xcr1 |= XFRLEN1(wpf - 1);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ /* Set word lengths */
+ regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_16);
+ regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_16);
+ regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_16);
+ regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_16);
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ /* Set word lengths */
+ regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_32);
+ regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_32);
+ regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_32);
+ regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_32);
+ break;
+ default:
+ /* Unsupported PCM format */
+ return -EINVAL;
+ }
+
+ /* In McBSP master modes, FRAME (i.e. sample rate) is generated
+ * by _counting_ BCLKs. Calculate frame size in BCLKs */
+ master = mcbsp->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
+ if (master == SND_SOC_DAIFMT_BP_FP) {
+ div = mcbsp->clk_div ? mcbsp->clk_div : 1;
+ framesize = (mcbsp->in_freq / div) / params_rate(params);
+
+ if (framesize < wlen * channels) {
+ printk(KERN_ERR "%s: not enough bandwidth for desired rate and "
+ "channels\n", __func__);
+ return -EINVAL;
+ }
+ } else
+ framesize = wlen * channels;
+
+ /* Set FS period and length in terms of bit clock periods */
+ regs->srgr2 &= ~FPER(0xfff);
+ regs->srgr1 &= ~FWID(0xff);
+ switch (format) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_LEFT_J:
+ regs->srgr2 |= FPER(framesize - 1);
+ regs->srgr1 |= FWID((framesize >> 1) - 1);
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ case SND_SOC_DAIFMT_DSP_B:
+ regs->srgr2 |= FPER(framesize - 1);
+ regs->srgr1 |= FWID(0);
+ break;
+ }
+
+ omap_mcbsp_config(mcbsp, &mcbsp->cfg_regs);
+ mcbsp->wlen = wlen;
+ mcbsp->configured = 1;
+
+ return 0;
+}
+
+/*
+ * This must be called before _set_clkdiv and _set_sysclk since McBSP register
+ * cache is initialized here
+ */
+static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+ unsigned int fmt)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
+ bool inv_fs = false;
+
+ if (mcbsp->configured)
+ return 0;
+
+ mcbsp->fmt = fmt;
+ memset(regs, 0, sizeof(*regs));
+ /* Generic McBSP register settings */
+ regs->spcr2 |= XINTM(3) | FREE;
+ regs->spcr1 |= RINTM(3);
+ /* RFIG and XFIG are not defined in 2430 and on OMAP3+ */
+ if (!mcbsp->pdata->has_ccr) {
+ regs->rcr2 |= RFIG;
+ regs->xcr2 |= XFIG;
+ }
+
+ /* Configure XCCR/RCCR only for revisions which have ccr registers */
+ if (mcbsp->pdata->has_ccr) {
+ regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE;
+ regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ /* 1-bit data delay */
+ regs->rcr2 |= RDATDLY(1);
+ regs->xcr2 |= XDATDLY(1);
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ /* 0-bit data delay */
+ regs->rcr2 |= RDATDLY(0);
+ regs->xcr2 |= XDATDLY(0);
+ regs->spcr1 |= RJUST(2);
+ /* Invert FS polarity configuration */
+ inv_fs = true;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ /* 1-bit data delay */
+ regs->rcr2 |= RDATDLY(1);
+ regs->xcr2 |= XDATDLY(1);
+ /* Invert FS polarity configuration */
+ inv_fs = true;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ /* 0-bit data delay */
+ regs->rcr2 |= RDATDLY(0);
+ regs->xcr2 |= XDATDLY(0);
+ /* Invert FS polarity configuration */
+ inv_fs = true;
+ break;
+ default:
+ /* Unsupported data format */
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
+ /* McBSP master. Set FS and bit clocks as outputs */
+ regs->pcr0 |= FSXM | FSRM |
+ CLKXM | CLKRM;
+ /* Sample rate generator drives the FS */
+ regs->srgr2 |= FSGM;
+ break;
+ case SND_SOC_DAIFMT_BC_FP:
+ /* McBSP slave. FS clock as output */
+ regs->srgr2 |= FSGM;
+ regs->pcr0 |= FSXM | FSRM;
+ break;
+ case SND_SOC_DAIFMT_BC_FC:
+ /* McBSP slave */
+ break;
+ default:
+ /* Unsupported master/slave configuration */
+ return -EINVAL;
+ }
+
+ /* Set bit clock (CLKX/CLKR) and FS polarities */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ /*
+ * Normal BCLK + FS.
+ * FS active low. TX data driven on falling edge of bit clock
+ * and RX data sampled on rising edge of bit clock.
+ */
+ regs->pcr0 |= FSXP | FSRP |
+ CLKXP | CLKRP;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ regs->pcr0 |= CLKXP | CLKRP;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ regs->pcr0 |= FSXP | FSRP;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (inv_fs)
+ regs->pcr0 ^= FSXP | FSRP;
+
+ return 0;
+}
+
+static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
+ int div_id, int div)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
+
+ if (div_id != OMAP_MCBSP_CLKGDV)
+ return -ENODEV;
+
+ mcbsp->clk_div = div;
+ regs->srgr1 &= ~CLKGDV(0xff);
+ regs->srgr1 |= CLKGDV(div - 1);
+
+ return 0;
+}
+
+static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
+ int clk_id, unsigned int freq,
+ int dir)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
+ struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
+ int err = 0;
+
+ if (mcbsp->active) {
+ if (freq == mcbsp->in_freq)
+ return 0;
+ else
+ return -EBUSY;
+ }
+
+ mcbsp->in_freq = freq;
+ regs->srgr2 &= ~CLKSM;
+ regs->pcr0 &= ~SCLKME;
+
+ switch (clk_id) {
+ case OMAP_MCBSP_SYSCLK_CLK:
+ regs->srgr2 |= CLKSM;
+ break;
+ case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
+ if (mcbsp_omap1()) {
+ err = -EINVAL;
+ break;
+ }
+ err = omap2_mcbsp_set_clks_src(mcbsp,
+ MCBSP_CLKS_PRCM_SRC);
+ break;
+ case OMAP_MCBSP_SYSCLK_CLKS_EXT:
+ if (mcbsp_omap1()) {
+ err = 0;
+ break;
+ }
+ err = omap2_mcbsp_set_clks_src(mcbsp,
+ MCBSP_CLKS_PAD_SRC);
+ break;
+
+ case OMAP_MCBSP_SYSCLK_CLKX_EXT:
+ regs->srgr2 |= CLKSM;
+ regs->pcr0 |= SCLKME;
+ /*
+ * If McBSP is master but yet the CLKX/CLKR pin drives the SRG,
+ * disable output on those pins. This enables to inject the
+ * reference clock through CLKX/CLKR. For this to work
+ * set_dai_sysclk() _needs_ to be called after set_dai_fmt().
+ */
+ regs->pcr0 &= ~CLKXM;
+ break;
+ case OMAP_MCBSP_SYSCLK_CLKR_EXT:
+ regs->pcr0 |= SCLKME;
+ /* Disable ouput on CLKR pin in master mode */
+ regs->pcr0 &= ~CLKRM;
+ break;
+ default:
+ err = -ENODEV;
+ }
+
+ return err;
+}
+
+static int omap_mcbsp_probe(struct snd_soc_dai *dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(dai);
+
+ pm_runtime_enable(mcbsp->dev);
+
+ snd_soc_dai_init_dma_data(dai,
+ &mcbsp->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
+ &mcbsp->dma_data[SNDRV_PCM_STREAM_CAPTURE]);
+
+ return 0;
+}
+
+static int omap_mcbsp_remove(struct snd_soc_dai *dai)
+{
+ struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(dai);
+
+ pm_runtime_disable(mcbsp->dev);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mcbsp_dai_ops = {
+ .probe = omap_mcbsp_probe,
+ .remove = omap_mcbsp_remove,
+ .startup = omap_mcbsp_dai_startup,
+ .shutdown = omap_mcbsp_dai_shutdown,
+ .prepare = omap_mcbsp_dai_prepare,
+ .trigger = omap_mcbsp_dai_trigger,
+ .delay = omap_mcbsp_dai_delay,
+ .hw_params = omap_mcbsp_dai_hw_params,
+ .set_fmt = omap_mcbsp_dai_set_dai_fmt,
+ .set_clkdiv = omap_mcbsp_dai_set_clkdiv,
+ .set_sysclk = omap_mcbsp_dai_set_dai_sysclk,
+};
+
+static struct snd_soc_dai_driver omap_mcbsp_dai = {
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 16,
+ .rates = OMAP_MCBSP_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 16,
+ .rates = OMAP_MCBSP_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &mcbsp_dai_ops,
+};
+
+static const struct snd_soc_component_driver omap_mcbsp_component = {
+ .name = "omap-mcbsp",
+ .legacy_dai_naming = 1,
+};
+
+static struct omap_mcbsp_platform_data omap2420_pdata = {
+ .reg_step = 4,
+ .reg_size = 2,
+};
+
+static struct omap_mcbsp_platform_data omap2430_pdata = {
+ .reg_step = 4,
+ .reg_size = 4,
+ .has_ccr = true,
+};
+
+static struct omap_mcbsp_platform_data omap3_pdata = {
+ .reg_step = 4,
+ .reg_size = 4,
+ .has_ccr = true,
+ .has_wakeup = true,
+};
+
+static struct omap_mcbsp_platform_data omap4_pdata = {
+ .reg_step = 4,
+ .reg_size = 4,
+ .has_ccr = true,
+ .has_wakeup = true,
+};
+
+static const struct of_device_id omap_mcbsp_of_match[] = {
+ {
+ .compatible = "ti,omap2420-mcbsp",
+ .data = &omap2420_pdata,
+ },
+ {
+ .compatible = "ti,omap2430-mcbsp",
+ .data = &omap2430_pdata,
+ },
+ {
+ .compatible = "ti,omap3-mcbsp",
+ .data = &omap3_pdata,
+ },
+ {
+ .compatible = "ti,omap4-mcbsp",
+ .data = &omap4_pdata,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, omap_mcbsp_of_match);
+
+static int asoc_mcbsp_probe(struct platform_device *pdev)
+{
+ struct omap_mcbsp_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct omap_mcbsp *mcbsp;
+ const struct of_device_id *match;
+ int ret;
+
+ match = of_match_device(omap_mcbsp_of_match, &pdev->dev);
+ if (match) {
+ struct device_node *node = pdev->dev.of_node;
+ struct omap_mcbsp_platform_data *pdata_quirk = pdata;
+ int buffer_size;
+
+ pdata = devm_kzalloc(&pdev->dev,
+ sizeof(struct omap_mcbsp_platform_data),
+ GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ memcpy(pdata, match->data, sizeof(*pdata));
+ if (!of_property_read_u32(node, "ti,buffer-size", &buffer_size))
+ pdata->buffer_size = buffer_size;
+ if (pdata_quirk)
+ pdata->force_ick_on = pdata_quirk->force_ick_on;
+ } else if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data.\n");
+ return -EINVAL;
+ }
+ mcbsp = devm_kzalloc(&pdev->dev, sizeof(struct omap_mcbsp), GFP_KERNEL);
+ if (!mcbsp)
+ return -ENOMEM;
+
+ mcbsp->id = pdev->id;
+ mcbsp->pdata = pdata;
+ mcbsp->dev = &pdev->dev;
+ platform_set_drvdata(pdev, mcbsp);
+
+ ret = omap_mcbsp_init(pdev);
+ if (ret)
+ return ret;
+
+ if (mcbsp->pdata->reg_size == 2) {
+ omap_mcbsp_dai.playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
+ omap_mcbsp_dai.capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
+ }
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &omap_mcbsp_component,
+ &omap_mcbsp_dai, 1);
+ if (ret)
+ return ret;
+
+ return sdma_pcm_platform_register(&pdev->dev, "tx", "rx");
+}
+
+static void asoc_mcbsp_remove(struct platform_device *pdev)
+{
+ struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
+
+ if (mcbsp->pdata->ops && mcbsp->pdata->ops->free)
+ mcbsp->pdata->ops->free(mcbsp->id);
+
+ if (cpu_latency_qos_request_active(&mcbsp->pm_qos_req))
+ cpu_latency_qos_remove_request(&mcbsp->pm_qos_req);
+}
+
+static struct platform_driver asoc_mcbsp_driver = {
+ .driver = {
+ .name = "omap-mcbsp",
+ .of_match_table = omap_mcbsp_of_match,
+ },
+
+ .probe = asoc_mcbsp_probe,
+ .remove_new = asoc_mcbsp_remove,
+};
+
+module_platform_driver(asoc_mcbsp_driver);
+
+MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
+MODULE_DESCRIPTION("OMAP I2S SoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:omap-mcbsp");