fsl_ssi_set_dai_fmt() manages most of the register setup routines now. fsl_ssi_setup() makes the same as fsl_ssi_set_dai_fmt() but it relies on DT properties.

In most cases the settings of fsl_ssi_setup() are already overwritten by fsl_ssi_set_dai_fmt() when it is called by the soc-core when a sound card is added. As these settings depend on the combination of codec and cpu DAI, this should really be done by sound cards.

This patch removes fsl_ssi_setup() and adds the missing register setups to fsl_ssi_set_dai_fmt(). It also removes all calls to fsl_ssi_setup().

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 143 +++++++++++++----------------------------------- 1 file changed, 39 insertions(+), 104 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 5428a1f..144934e 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -642,96 +642,6 @@ static void fsl_ssi_setup_ac97(struct fsl_ssi_private *ssi_private) write_ssi(CCSR_SSI_SOR_WAIT(3), &ssi->sor); }

-static int fsl_ssi_setup(struct fsl_ssi_private *ssi_private) -{ - struct ccsr_ssi __iomem *ssi = ssi_private->ssi; - u8 wm; - int synchronous = ssi_private->cpu_dai_drv.symmetric_rates; - - fsl_ssi_setup_reg_vals(ssi_private); - - if (ssi_private->imx_ac97) - ssi_private->i2s_mode = CCSR_SSI_SCR_I2S_MODE_NORMAL | CCSR_SSI_SCR_NET; - else - ssi_private->i2s_mode = CCSR_SSI_SCR_I2S_MODE_SLAVE; - - /* - * Section 16.5 of the MPC8610 reference manual says that the SSI needs - * to be disabled before updating the registers we set here. - */ - write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0); - - /* - * Program the SSI into I2S Slave Non-Network Synchronous mode. Also - * enable the transmit and receive FIFO. - * - * FIXME: Little-endian samples require a different shift dir - */ - write_ssi_mask(&ssi->scr, - CCSR_SSI_SCR_I2S_MODE_MASK | CCSR_SSI_SCR_SYN, - CCSR_SSI_SCR_TFR_CLK_DIS | - ssi_private->i2s_mode | - (synchronous ? CCSR_SSI_SCR_SYN : 0)); - - write_ssi(CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFSI | - CCSR_SSI_STCR_TEFS | CCSR_SSI_STCR_TSCKP, &ssi->stcr); - - write_ssi(CCSR_SSI_SRCR_RXBIT0 | CCSR_SSI_SRCR_RFSI | - CCSR_SSI_SRCR_REFS | CCSR_SSI_SRCR_RSCKP, &ssi->srcr); - - /* - * The DC and PM bits are only used if the SSI is the clock master. - */ - - /* - * Set the watermark for transmit FIFI 0 and receive FIFO 0. We don't - * use FIFO 1. We program the transmit water to signal a DMA transfer - * if there are only two (or fewer) elements left in the FIFO. Two - * elements equals one frame (left channel, right channel). This value, - * however, depends on the depth of the transmit buffer. - * - * We set the watermark on the same level as the DMA burstsize. For - * fiq it is probably better to use the biggest possible watermark - * size. - */ - if (ssi_private->use_dma) - wm = ssi_private->fifo_depth - 2; - else - wm = ssi_private->fifo_depth; - - write_ssi(CCSR_SSI_SFCSR_TFWM0(wm) | CCSR_SSI_SFCSR_RFWM0(wm) | - CCSR_SSI_SFCSR_TFWM1(wm) | CCSR_SSI_SFCSR_RFWM1(wm), - &ssi->sfcsr); - - /* - * For ac97 interrupts are enabled with the startup of the substream - * because it is also running without an active substream. Normally SSI - * is only enabled when there is a substream. - */ - if (ssi_private->imx_ac97) - fsl_ssi_setup_ac97(ssi_private); - - /* - * Set a default slot number so that there is no need for those common - * cases like I2S mode to call the extra set_tdm_slot() any more. - */ - if (!ssi_private->imx_ac97) { - write_ssi_mask(&ssi->stccr, CCSR_SSI_SxCCR_DC_MASK, - CCSR_SSI_SxCCR_DC(2)); - write_ssi_mask(&ssi->srccr, CCSR_SSI_SxCCR_DC_MASK, - CCSR_SSI_SxCCR_DC(2)); - } - - if (ssi_private->use_dual_fifo) { - write_ssi_mask(&ssi->srcr, 0, CCSR_SSI_SRCR_RFEN1); - write_ssi_mask(&ssi->stcr, 0, CCSR_SSI_STCR_TFEN1); - write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_TCH_EN); - } - - return 0; -} - - /** * fsl_ssi_startup: create a new substream * @@ -748,12 +658,7 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream, snd_soc_dai_get_drvdata(rtd->cpu_dai); unsigned long flags;

- /* First, we only do fsl_ssi_setup() when SSI is going to be active. - * Second, fsl_ssi_setup was already called by ac97_init earlier if - * the driver is in ac97 mode. - */ if (!dai->active && !ssi_private->imx_ac97) { - fsl_ssi_setup(ssi_private); spin_lock_irqsave(&ssi_private->baudclk_lock, flags); ssi_private->baudclk_locked = false; spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags); @@ -835,6 +740,9 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); struct ccsr_ssi __iomem *ssi = ssi_private->ssi; u32 strcr = 0, stcr, srcr, scr, mask; + u8 wm; + + fsl_ssi_setup_reg_vals(ssi_private);

scr = read_ssi(&ssi->scr) & ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK); scr |= CCSR_SSI_SCR_NET; @@ -857,7 +765,6 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) default: return -EINVAL; } - scr |= ssi_private->i2s_mode;

/* Data on rising edge of bclk, frame low, 1clk before data */ strcr |= CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TSCKP | @@ -877,9 +784,13 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) strcr |= CCSR_SSI_STCR_TFSL | CCSR_SSI_STCR_TSCKP | CCSR_SSI_STCR_TXBIT0; break; + case SND_SOC_DAIFMT_AC97: + ssi_private->i2s_mode = CCSR_SSI_SCR_I2S_MODE_NORMAL; + break; default: return -EINVAL; } + scr |= ssi_private->i2s_mode;

/* DAI clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { @@ -929,6 +840,38 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) write_ssi(srcr, &ssi->srcr); write_ssi(scr, &ssi->scr);

+ /* + * Set the watermark for transmit FIFI 0 and receive FIFO 0. We don't + * use FIFO 1. We program the transmit water to signal a DMA transfer + * if there are only two (or fewer) elements left in the FIFO. Two + * elements equals one frame (left channel, right channel). This value, + * however, depends on the depth of the transmit buffer. + * + * We set the watermark on the same level as the DMA burstsize. For + * fiq it is probably better to use the biggest possible watermark + * size. + */ + if (ssi_private->use_dma) + wm = ssi_private->fifo_depth - 2; + else + wm = ssi_private->fifo_depth; + + write_ssi(CCSR_SSI_SFCSR_TFWM0(wm) | CCSR_SSI_SFCSR_RFWM0(wm) | + CCSR_SSI_SFCSR_TFWM1(wm) | CCSR_SSI_SFCSR_RFWM1(wm), + &ssi->sfcsr); + + if (ssi_private->use_dual_fifo) { + write_ssi_mask(&ssi->srcr, CCSR_SSI_SRCR_RFEN1, + CCSR_SSI_SRCR_RFEN1); + write_ssi_mask(&ssi->stcr, CCSR_SSI_STCR_TFEN1, + CCSR_SSI_STCR_TFEN1); + write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_TCH_EN, + CCSR_SSI_SCR_TCH_EN); + } + + if (fmt & SND_SOC_DAIFMT_AC97) + fsl_ssi_setup_ac97(ssi_private); + return 0; }

@@ -1184,11 +1127,6 @@ static struct snd_soc_dai_driver fsl_ssi_ac97_dai = {

static struct fsl_ssi_private *fsl_ac97_data;

-static void fsl_ssi_ac97_init(void) -{ - fsl_ssi_setup(fsl_ac97_data); -} - static void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) { @@ -1547,9 +1485,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) }

done: - if (ssi_private->imx_ac97) - fsl_ssi_ac97_init(); - return 0;

error_dai:

Move all code that is only used for debugging to a seperate file. This makes it easier to see what functions are used for debugging only.

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/Makefile | 2 + sound/soc/fsl/fsl_ssi.c | 241 ++------------------------------------------ sound/soc/fsl/fsl_ssi.h | 61 ++++++++++- sound/soc/fsl/fsl_ssi_dbg.c | 163 ++++++++++++++++++++++++++++++ 4 files changed, 232 insertions(+), 235 deletions(-) create mode 100644 sound/soc/fsl/fsl_ssi_dbg.c

diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index b12ad4b..02a2e2e 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -13,12 +13,14 @@ obj-$(CONFIG_SND_SOC_P1022_RDK) += snd-soc-p1022-rdk.o # Freescale SSI/DMA/SAI/SPDIF Support snd-soc-fsl-sai-objs := fsl_sai.o snd-soc-fsl-ssi-objs := fsl_ssi.o +snd-soc-fsl-ssi-dbg-objs := fsl_ssi_dbg.o snd-soc-fsl-spdif-objs := fsl_spdif.o snd-soc-fsl-esai-objs := fsl_esai.o snd-soc-fsl-utils-objs := fsl_utils.o snd-soc-fsl-dma-objs := fsl_dma.o obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o obj-$(CONFIG_SND_SOC_FSL_SSI) += snd-soc-fsl-ssi.o +obj-$(CONFIG_DEBUG_FS) += snd-soc-fsl-ssi-dbg.o obj-$(CONFIG_SND_SOC_FSL_SPDIF) += snd-soc-fsl-spdif.o obj-$(CONFIG_SND_SOC_FSL_ESAI) += snd-soc-fsl-esai.o obj-$(CONFIG_SND_SOC_FSL_UTILS) += snd-soc-fsl-utils.o diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index fdb123d..6b198f3 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -35,7 +35,6 @@ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/clk.h> -#include <linux/debugfs.h> #include <linux/device.h> #include <linux/delay.h> #include <linux/slab.h> @@ -113,8 +112,6 @@ static inline void write_ssi_mask(u32 __iomem *addr, u32 clear, u32 set) #define FSLSSI_SIER_DBG_TX_FLAGS (CCSR_SSI_SIER_TFE0_EN | \ CCSR_SSI_SIER_TLS_EN | CCSR_SSI_SIER_TFS_EN | \ CCSR_SSI_SIER_TUE0_EN | CCSR_SSI_SIER_TFRC_EN) -#define FSLSSI_SISR_MASK (FSLSSI_SIER_DBG_RX_FLAGS | FSLSSI_SIER_DBG_TX_FLAGS) -

enum fsl_ssi_type { FSL_SSI_MCP8610, @@ -177,31 +174,7 @@ struct fsl_ssi_private { /* Register values for rx/tx configuration */ struct fsl_ssi_rxtx_reg_val rxtx_reg_val;

- struct { - unsigned int rfrc; - unsigned int tfrc; - unsigned int cmdau; - unsigned int cmddu; - unsigned int rxt; - unsigned int rdr1; - unsigned int rdr0; - unsigned int tde1; - unsigned int tde0; - unsigned int roe1; - unsigned int roe0; - unsigned int tue1; - unsigned int tue0; - unsigned int tfs; - unsigned int rfs; - unsigned int tls; - unsigned int rls; - unsigned int rff1; - unsigned int rff0; - unsigned int tfe1; - unsigned int tfe0; - } stats; - struct dentry *dbg_dir; - struct dentry *dbg_stats; + struct fsl_ssi_dbg dbg_stats;

char name[1]; }; @@ -231,7 +204,6 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id) { struct fsl_ssi_private *ssi_private = dev_id; struct ccsr_ssi __iomem *ssi = ssi_private->ssi; - irqreturn_t ret = IRQ_NONE; __be32 sisr; __be32 sisr2; __be32 sisr_write_mask = 0; @@ -258,217 +230,18 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id) were interrupted for. We mask it with the Interrupt Enable register so that we only check for events that we're interested in. */ - sisr = read_ssi(&ssi->sisr) & FSLSSI_SISR_MASK; - - if (sisr & CCSR_SSI_SISR_RFRC) { - ssi_private->stats.rfrc++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TFRC) { - ssi_private->stats.tfrc++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_CMDAU) { - ssi_private->stats.cmdau++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_CMDDU) { - ssi_private->stats.cmddu++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RXT) { - ssi_private->stats.rxt++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RDR1) { - ssi_private->stats.rdr1++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RDR0) { - ssi_private->stats.rdr0++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TDE1) { - ssi_private->stats.tde1++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TDE0) { - ssi_private->stats.tde0++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_ROE1) { - ssi_private->stats.roe1++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_ROE0) { - ssi_private->stats.roe0++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TUE1) { - ssi_private->stats.tue1++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TUE0) { - ssi_private->stats.tue0++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TFS) { - ssi_private->stats.tfs++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RFS) { - ssi_private->stats.rfs++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TLS) { - ssi_private->stats.tls++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RLS) { - ssi_private->stats.rls++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RFF1) { - ssi_private->stats.rff1++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_RFF0) { - ssi_private->stats.rff0++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TFE1) { - ssi_private->stats.tfe1++; - ret = IRQ_HANDLED; - } - - if (sisr & CCSR_SSI_SISR_TFE0) { - ssi_private->stats.tfe0++; - ret = IRQ_HANDLED; - } + sisr = read_ssi(&ssi->sisr);

sisr2 = sisr & sisr_write_mask; /* Clear the bits that we set */ if (sisr2) write_ssi(sisr2, &ssi->sisr);

- return ret; -} - -#if IS_ENABLED(CONFIG_DEBUG_FS) -/* Show the statistics of a flag only if its interrupt is enabled. The - * compiler will optimze this code to a no-op if the interrupt is not - * enabled. - */ -#define SIER_SHOW(flag, name) \ - do { \ - if (FSLSSI_SISR_MASK & CCSR_SSI_SIER_##flag) \ - seq_printf(s, #name "=%u\n", ssi_private->stats.name); \ - } while (0) - - -/** - * fsl_sysfs_ssi_show: display SSI statistics - * - * Display the statistics for the current SSI device. To avoid confusion, - * we only show those counts that are enabled. - */ -static int fsl_ssi_stats_show(struct seq_file *s, void *unused) -{ - struct fsl_ssi_private *ssi_private = s->private; - - SIER_SHOW(RFRC_EN, rfrc); - SIER_SHOW(TFRC_EN, tfrc); - SIER_SHOW(CMDAU_EN, cmdau); - SIER_SHOW(CMDDU_EN, cmddu); - SIER_SHOW(RXT_EN, rxt); - SIER_SHOW(RDR1_EN, rdr1); - SIER_SHOW(RDR0_EN, rdr0); - SIER_SHOW(TDE1_EN, tde1); - SIER_SHOW(TDE0_EN, tde0); - SIER_SHOW(ROE1_EN, roe1); - SIER_SHOW(ROE0_EN, roe0); - SIER_SHOW(TUE1_EN, tue1); - SIER_SHOW(TUE0_EN, tue0); - SIER_SHOW(TFS_EN, tfs); - SIER_SHOW(RFS_EN, rfs); - SIER_SHOW(TLS_EN, tls); - SIER_SHOW(RLS_EN, rls); - SIER_SHOW(RFF1_EN, rff1); - SIER_SHOW(RFF0_EN, rff0); - SIER_SHOW(TFE1_EN, tfe1); - SIER_SHOW(TFE0_EN, tfe0); - - return 0; -} - -static int fsl_ssi_stats_open(struct inode *inode, struct file *file) -{ - return single_open(file, fsl_ssi_stats_show, inode->i_private); -} - -static const struct file_operations fsl_ssi_stats_ops = { - .open = fsl_ssi_stats_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int fsl_ssi_debugfs_create(struct fsl_ssi_private *ssi_private, - struct device *dev) -{ - ssi_private->dbg_dir = debugfs_create_dir(dev_name(dev), NULL); - if (!ssi_private->dbg_dir) - return -ENOMEM; - - ssi_private->dbg_stats = debugfs_create_file("stats", S_IRUGO, - ssi_private->dbg_dir, ssi_private, &fsl_ssi_stats_ops); - if (!ssi_private->dbg_stats) { - debugfs_remove(ssi_private->dbg_dir); - return -ENOMEM; - } - - return 0; -} - -static void fsl_ssi_debugfs_remove(struct fsl_ssi_private *ssi_private) -{ - debugfs_remove(ssi_private->dbg_stats); - debugfs_remove(ssi_private->dbg_dir); -} - -#else - -static int fsl_ssi_debugfs_create(struct fsl_ssi_private *ssi_private, - struct device *dev) -{ - return 0; -} + fsl_ssi_dbg_isr(&ssi_private->dbg_stats, sisr);

-static void fsl_ssi_debugfs_remove(struct fsl_ssi_private *ssi_private) -{ + return IRQ_HANDLED; }

-#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */ - /* * Enable/Disable all rx/tx config flags at once. */ @@ -1422,7 +1195,7 @@ static int fsl_ssi_probe(struct platform_device *pdev) goto error_dev; }

- ret = fsl_ssi_debugfs_create(ssi_private, &pdev->dev); + ret = fsl_ssi_debugfs_create(&ssi_private->dbg_stats, &pdev->dev); if (ret) goto error_dbgfs;

@@ -1492,7 +1265,7 @@ error_dai: imx_pcm_fiq_exit(pdev);

error_pcm: - fsl_ssi_debugfs_remove(ssi_private); + fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);

error_dbgfs: snd_soc_unregister_component(&pdev->dev); @@ -1518,7 +1291,7 @@ static int fsl_ssi_remove(struct platform_device *pdev) { struct fsl_ssi_private *ssi_private = dev_get_drvdata(&pdev->dev);

- fsl_ssi_debugfs_remove(ssi_private); + fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);

if (!ssi_private->new_binding) platform_device_unregister(ssi_private->pdev); diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h index e6b6324..2e95dd7 100644 --- a/sound/soc/fsl/fsl_ssi.h +++ b/sound/soc/fsl/fsl_ssi.h @@ -206,5 +206,64 @@ struct ccsr_ssi { #define CCSR_SSI_SACNT_FV 0x00000002 #define CCSR_SSI_SACNT_AC97EN 0x00000001

-#endif

+struct device; + +#if IS_ENABLED(CONFIG_DEBUG_FS) + +struct fsl_ssi_dbg { + struct dentry *dbg_dir; + struct dentry *dbg_stats; + + struct { + unsigned int rfrc; + unsigned int tfrc; + unsigned int cmdau; + unsigned int cmddu; + unsigned int rxt; + unsigned int rdr1; + unsigned int rdr0; + unsigned int tde1; + unsigned int tde0; + unsigned int roe1; + unsigned int roe0; + unsigned int tue1; + unsigned int tue0; + unsigned int tfs; + unsigned int rfs; + unsigned int tls; + unsigned int rls; + unsigned int rff1; + unsigned int rff0; + unsigned int tfe1; + unsigned int tfe0; + } stats; +}; + +void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *ssi_dbg, u32 sisr); + +int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev); + +void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg); + +#else + +struct fsl_ssi_dbg { +}; + +static inline void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *stats, u32 sisr) +{ +} + +static inline int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, + struct device *dev) +{ + return 0; +} + +static inline void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg) +{ +} +#endif /* ! IS_ENABLED(CONFIG_DEBUG_FS) */ + +#endif diff --git a/sound/soc/fsl/fsl_ssi_dbg.c b/sound/soc/fsl/fsl_ssi_dbg.c new file mode 100644 index 0000000..5469ffb --- /dev/null +++ b/sound/soc/fsl/fsl_ssi_dbg.c @@ -0,0 +1,163 @@ +/* + * Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions + * + * Copyright 2014 Markus Pargmann mpa@pengutronix.de, Pengutronix + * + * Splitted from fsl_ssi.c + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/debugfs.h> +#include <linux/device.h> +#include <linux/kernel.h> + +#include "fsl_ssi.h" + +void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *dbg, u32 sisr) +{ + if (sisr & CCSR_SSI_SISR_RFRC) + dbg->stats.rfrc++; + + if (sisr & CCSR_SSI_SISR_TFRC) + dbg->stats.tfrc++; + + if (sisr & CCSR_SSI_SISR_CMDAU) + dbg->stats.cmdau++; + + if (sisr & CCSR_SSI_SISR_CMDDU) + dbg->stats.cmddu++; + + if (sisr & CCSR_SSI_SISR_RXT) + dbg->stats.rxt++; + + if (sisr & CCSR_SSI_SISR_RDR1) + dbg->stats.rdr1++; + + if (sisr & CCSR_SSI_SISR_RDR0) + dbg->stats.rdr0++; + + if (sisr & CCSR_SSI_SISR_TDE1) + dbg->stats.tde1++; + + if (sisr & CCSR_SSI_SISR_TDE0) + dbg->stats.tde0++; + + if (sisr & CCSR_SSI_SISR_ROE1) + dbg->stats.roe1++; + + if (sisr & CCSR_SSI_SISR_ROE0) + dbg->stats.roe0++; + + if (sisr & CCSR_SSI_SISR_TUE1) + dbg->stats.tue1++; + + if (sisr & CCSR_SSI_SISR_TUE0) + dbg->stats.tue0++; + + if (sisr & CCSR_SSI_SISR_TFS) + dbg->stats.tfs++; + + if (sisr & CCSR_SSI_SISR_RFS) + dbg->stats.rfs++; + + if (sisr & CCSR_SSI_SISR_TLS) + dbg->stats.tls++; + + if (sisr & CCSR_SSI_SISR_RLS) + dbg->stats.rls++; + + if (sisr & CCSR_SSI_SISR_RFF1) + dbg->stats.rff1++; + + if (sisr & CCSR_SSI_SISR_RFF0) + dbg->stats.rff0++; + + if (sisr & CCSR_SSI_SISR_TFE1) + dbg->stats.tfe1++; + + if (sisr & CCSR_SSI_SISR_TFE0) + dbg->stats.tfe0++; +} + +/* Show the statistics of a flag only if its interrupt is enabled. The + * compiler will optimze this code to a no-op if the interrupt is not + * enabled. + */ +#define SIER_SHOW(flag, name) \ + do { \ + if (CCSR_SSI_SIER_##flag) \ + seq_printf(s, #name "=%u\n", ssi_dbg->stats.name); \ + } while (0) + + +/** + * fsl_sysfs_ssi_show: display SSI statistics + * + * Display the statistics for the current SSI device. To avoid confusion, + * we only show those counts that are enabled. + */ +static int fsl_ssi_stats_show(struct seq_file *s, void *unused) +{ + struct fsl_ssi_dbg *ssi_dbg = s->private; + + SIER_SHOW(RFRC_EN, rfrc); + SIER_SHOW(TFRC_EN, tfrc); + SIER_SHOW(CMDAU_EN, cmdau); + SIER_SHOW(CMDDU_EN, cmddu); + SIER_SHOW(RXT_EN, rxt); + SIER_SHOW(RDR1_EN, rdr1); + SIER_SHOW(RDR0_EN, rdr0); + SIER_SHOW(TDE1_EN, tde1); + SIER_SHOW(TDE0_EN, tde0); + SIER_SHOW(ROE1_EN, roe1); + SIER_SHOW(ROE0_EN, roe0); + SIER_SHOW(TUE1_EN, tue1); + SIER_SHOW(TUE0_EN, tue0); + SIER_SHOW(TFS_EN, tfs); + SIER_SHOW(RFS_EN, rfs); + SIER_SHOW(TLS_EN, tls); + SIER_SHOW(RLS_EN, rls); + SIER_SHOW(RFF1_EN, rff1); + SIER_SHOW(RFF0_EN, rff0); + SIER_SHOW(TFE1_EN, tfe1); + SIER_SHOW(TFE0_EN, tfe0); + + return 0; +} + +static int fsl_ssi_stats_open(struct inode *inode, struct file *file) +{ + return single_open(file, fsl_ssi_stats_show, inode->i_private); +} + +static const struct file_operations fsl_ssi_stats_ops = { + .open = fsl_ssi_stats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev) +{ + ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL); + if (!ssi_dbg->dbg_dir) + return -ENOMEM; + + ssi_dbg->dbg_stats = debugfs_create_file("stats", S_IRUGO, + ssi_dbg->dbg_dir, ssi_dbg, &fsl_ssi_stats_ops); + if (!ssi_dbg->dbg_stats) { + debugfs_remove(ssi_dbg->dbg_dir); + return -ENOMEM; + } + + return 0; +} + +void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg) +{ + debugfs_remove(ssi_dbg->dbg_stats); + debugfs_remove(ssi_dbg->dbg_dir); +}

Move imx specific probe code to a seperate function. It reduces the size of the probe() function and makes the code and error handling easier to understand.

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 185 +++++++++++++++++++++++++++--------------------- 1 file changed, 103 insertions(+), 82 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index f31bd15..b28f874 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -962,6 +962,100 @@ static void make_lowercase(char *s) } }

+static int fsl_ssi_imx_probe(struct platform_device *pdev, + struct fsl_ssi_private *ssi_private) +{ + struct device_node *np = pdev->dev.of_node; + u32 dma_events[2], dmas[4]; + bool shared; + int ret; + + ssi_private->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(ssi_private->clk)) { + ret = PTR_ERR(ssi_private->clk); + dev_err(&pdev->dev, "could not get clock: %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(ssi_private->clk); + if (ret) { + dev_err(&pdev->dev, "clk_prepare_enable failed: %d\n", ret); + return ret; + } + + /* For those SLAVE implementations, we ingore non-baudclk cases + * and, instead, abandon MASTER mode that needs baud clock. + */ + ssi_private->baudclk = devm_clk_get(&pdev->dev, "baud"); + if (IS_ERR(ssi_private->baudclk)) + dev_dbg(&pdev->dev, "could not get baud clock: %ld\n", + PTR_ERR(ssi_private->baudclk)); + else + clk_prepare_enable(ssi_private->baudclk); + + /* + * We have burstsize be "fifo_depth - 2" to match the SSI + * watermark setting in fsl_ssi_startup(). + */ + ssi_private->dma_params_tx.maxburst = ssi_private->fifo_depth - 2; + ssi_private->dma_params_rx.maxburst = ssi_private->fifo_depth - 2; + ssi_private->dma_params_tx.addr = ssi_private->ssi_phys + + offsetof(struct ccsr_ssi, stx0); + ssi_private->dma_params_rx.addr = ssi_private->ssi_phys + + offsetof(struct ccsr_ssi, srx0); + ssi_private->dma_params_tx.filter_data = &ssi_private->filter_data_tx; + ssi_private->dma_params_rx.filter_data = &ssi_private->filter_data_rx; + + if (!of_property_read_bool(pdev->dev.of_node, "dmas") && + ssi_private->use_dma) { + /* + * FIXME: This is a temporary solution until all + * necessary dma drivers support the generic dma + * bindings. + */ + ret = of_property_read_u32_array(pdev->dev.of_node, + "fsl,ssi-dma-events", dma_events, 2); + if (ret && ssi_private->use_dma) { + dev_err(&pdev->dev, "could not get dma events but fsl-ssi is configured to use DMA\n"); + goto error_dma_events; + } + } + /* Should this be merge with the above? */ + if (!of_property_read_u32_array(pdev->dev.of_node, "dmas", dmas, 4) + && dmas[2] == IMX_DMATYPE_SSI_DUAL) { + ssi_private->use_dual_fifo = true; + /* When using dual fifo mode, we need to keep watermark + * as even numbers due to dma script limitation. + */ + ssi_private->dma_params_tx.maxburst &= ~0x1; + ssi_private->dma_params_rx.maxburst &= ~0x1; + } + + shared = of_device_is_compatible(of_get_parent(np), "fsl,spba-bus"); + + imx_pcm_dma_params_init_data(&ssi_private->filter_data_tx, + dma_events[0], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI); + imx_pcm_dma_params_init_data(&ssi_private->filter_data_rx, + dma_events[1], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI); + + return 0; + +error_dma_events: + if (!IS_ERR(ssi_private->baudclk)) + clk_disable_unprepare(ssi_private->baudclk); + clk_disable_unprepare(ssi_private->clk); + + return ret; +} + +static void fsl_ssi_imx_clean(struct platform_device *pdev, + struct fsl_ssi_private *ssi_private) +{ + if (!IS_ERR(ssi_private->baudclk)) + clk_disable_unprepare(ssi_private->baudclk); + clk_disable_unprepare(ssi_private->clk); +} + static int fsl_ssi_probe(struct platform_device *pdev) { struct fsl_ssi_private *ssi_private; @@ -974,7 +1068,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) const uint32_t *iprop; struct resource res; char name[64]; - bool shared; bool ac97 = false;

/* SSIs that are not connected on the board should have a @@ -1088,80 +1181,11 @@ static int fsl_ssi_probe(struct platform_device *pdev)

if (hw_type == FSL_SSI_MX21 || hw_type == FSL_SSI_MX51 || hw_type == FSL_SSI_MX35) { - u32 dma_events[2], dmas[4]; ssi_private->ssi_on_imx = true;

- ssi_private->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(ssi_private->clk)) { - ret = PTR_ERR(ssi_private->clk); - dev_err(&pdev->dev, "could not get clock: %d\n", ret); + ret = fsl_ssi_imx_probe(pdev, ssi_private); + if (ret) goto error_irqmap; - } - ret = clk_prepare_enable(ssi_private->clk); - if (ret) { - dev_err(&pdev->dev, "clk_prepare_enable failed: %d\n", - ret); - goto error_irqmap; - } - - /* For those SLAVE implementations, we ingore non-baudclk cases - * and, instead, abandon MASTER mode that needs baud clock. - */ - ssi_private->baudclk = devm_clk_get(&pdev->dev, "baud"); - if (IS_ERR(ssi_private->baudclk)) - dev_dbg(&pdev->dev, "could not get baud clock: %ld\n", - PTR_ERR(ssi_private->baudclk)); - else - clk_prepare_enable(ssi_private->baudclk); - - /* - * We have burstsize be "fifo_depth - 2" to match the SSI - * watermark setting in fsl_ssi_startup(). - */ - ssi_private->dma_params_tx.maxburst = - ssi_private->fifo_depth - 2; - ssi_private->dma_params_rx.maxburst = - ssi_private->fifo_depth - 2; - ssi_private->dma_params_tx.addr = - ssi_private->ssi_phys + offsetof(struct ccsr_ssi, stx0); - ssi_private->dma_params_rx.addr = - ssi_private->ssi_phys + offsetof(struct ccsr_ssi, srx0); - ssi_private->dma_params_tx.filter_data = - &ssi_private->filter_data_tx; - ssi_private->dma_params_rx.filter_data = - &ssi_private->filter_data_rx; - if (!of_property_read_bool(pdev->dev.of_node, "dmas") && - ssi_private->use_dma) { - /* - * FIXME: This is a temporary solution until all - * necessary dma drivers support the generic dma - * bindings. - */ - ret = of_property_read_u32_array(pdev->dev.of_node, - "fsl,ssi-dma-events", dma_events, 2); - if (ret && ssi_private->use_dma) { - dev_err(&pdev->dev, "could not get dma events but fsl-ssi is configured to use DMA\n"); - goto error_clk; - } - } - /* Should this be merge with the above? */ - if (!of_property_read_u32_array(pdev->dev.of_node, "dmas", dmas, 4) - && dmas[2] == IMX_DMATYPE_SSI_DUAL) { - ssi_private->use_dual_fifo = true; - /* When using dual fifo mode, we need to keep watermark - * as even numbers due to dma script limitation. - */ - ssi_private->dma_params_tx.maxburst &= ~0x1; - ssi_private->dma_params_rx.maxburst &= ~0x1; - } - - shared = of_device_is_compatible(of_get_parent(np), - "fsl,spba-bus"); - - imx_pcm_dma_params_init_data(&ssi_private->filter_data_tx, - dma_events[0], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI); - imx_pcm_dma_params_init_data(&ssi_private->filter_data_rx, - dma_events[1], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI); }

/* @@ -1176,7 +1200,7 @@ static int fsl_ssi_probe(struct platform_device *pdev) if (ret < 0) { dev_err(&pdev->dev, "could not claim irq %u\n", ssi_private->irq); - goto error_clk; + goto error_irq; } }

@@ -1268,11 +1292,9 @@ error_dbgfs: error_dev: device_remove_file(&pdev->dev, dev_attr);

-error_clk: +error_irq: if (ssi_private->ssi_on_imx) { - if (!IS_ERR(ssi_private->baudclk)) - clk_disable_unprepare(ssi_private->baudclk); - clk_disable_unprepare(ssi_private->clk); + fsl_ssi_imx_clean(pdev, ssi_private); }

error_irqmap: @@ -1291,11 +1313,10 @@ static int fsl_ssi_remove(struct platform_device *pdev) if (!ssi_private->new_binding) platform_device_unregister(ssi_private->pdev); snd_soc_unregister_component(&pdev->dev); - if (ssi_private->ssi_on_imx) { - if (!IS_ERR(ssi_private->baudclk)) - clk_disable_unprepare(ssi_private->baudclk); - clk_disable_unprepare(ssi_private->clk); - } + + if (ssi_private->ssi_on_imx) + fsl_ssi_imx_clean(pdev, ssi_private); + if (ssi_private->irq_stats) irq_dispose_mapping(ssi_private->irq);

This patch adds error handling for baud clock. It checks for PROBE_DEFER error codes and handles clk_prepare_enable() errors.

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index fcc73d3..663ac8b 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -984,11 +984,19 @@ static int fsl_ssi_imx_probe(struct platform_device *pdev, * and, instead, abandon MASTER mode that needs baud clock. */ ssi_private->baudclk = devm_clk_get(&pdev->dev, "baud"); - if (IS_ERR(ssi_private->baudclk)) + if (IS_ERR(ssi_private->baudclk)) { + ret = PTR_ERR(ssi_private->baudclk); + if (ret == -EPROBE_DEFER) + goto error_baud_clk; dev_dbg(&pdev->dev, "could not get baud clock: %ld\n", - PTR_ERR(ssi_private->baudclk)); - else - clk_prepare_enable(ssi_private->baudclk); + PTR_ERR(ssi_private->baudclk)); + } else { + ret = clk_prepare_enable(ssi_private->baudclk); + if (ret) { + dev_err(&pdev->dev, "Failed to enable baud clock\n"); + goto error_baud_clk; + } + }

/* * We have burstsize be "fifo_depth - 2" to match the SSI @@ -1012,6 +1020,11 @@ static int fsl_ssi_imx_probe(struct platform_device *pdev, }

return 0; + +error_baud_clk: + clk_disable_unprepare(ssi_private->clk); + + return ret; }

static void fsl_ssi_imx_clean(struct platform_device *pdev,

There are some variables defined in struct fsl_ssi_private that describe states that are also described by other variables.

This patch adds some helper functions that return exactly the same information based on available variables. This helps to clean up struct fsl_ssi_private and remove them from the probe function.

It also removes some not really used variables (new_binding, name).

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 117 ++++++++++++++++++++++++++---------------------- 1 file changed, 64 insertions(+), 53 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index b0c04ef..126f277 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -143,7 +143,6 @@ struct fsl_ssi_rxtx_reg_val { * @cpu_dai: the CPU DAI for this device * @dev_attr: the sysfs device attribute structure * @stats: SSI statistics - * @name: name for this device */ struct fsl_ssi_private { struct ccsr_ssi __iomem *ssi; @@ -152,14 +151,11 @@ struct fsl_ssi_private { unsigned int fifo_depth; struct snd_soc_dai_driver cpu_dai_drv; struct platform_device *pdev; + unsigned int dai_fmt;

enum fsl_ssi_type hw_type; - bool new_binding; - bool ssi_on_imx; - bool imx_ac97; bool use_dma; bool baudclk_locked; - bool offline_config; bool use_dual_fifo; u8 i2s_mode; spinlock_t baudclk_lock; @@ -172,8 +168,6 @@ struct fsl_ssi_private { struct fsl_ssi_rxtx_reg_val rxtx_reg_val;

struct fsl_ssi_dbg dbg_stats; - - char name[1]; };

static const struct of_device_id fsl_ssi_ids[] = { @@ -185,6 +179,54 @@ static const struct of_device_id fsl_ssi_ids[] = { }; MODULE_DEVICE_TABLE(of, fsl_ssi_ids);

+static bool fsl_ssi_is_ac97(struct fsl_ssi_private *ssi_private) +{ + return !!(ssi_private->dai_fmt & SND_SOC_DAIFMT_AC97); +} + +static bool fsl_ssi_on_imx(struct fsl_ssi_private *ssi_private) +{ + switch (ssi_private->hw_type) { + case FSL_SSI_MX21: + case FSL_SSI_MX35: + case FSL_SSI_MX51: + return true; + case FSL_SSI_MCP8610: + return false; + } + + return false; +} + +/* + * imx51 and later SoCs have a slightly different IP that allows the + * SSI configuration while the SSI unit is running. + * + * More important, it is necessary on those SoCs to configure the + * sperate TX/RX DMA bits just before starting the stream + * (fsl_ssi_trigger). The SDMA unit has to be configured before fsl_ssi + * sends any DMA requests to the SDMA unit, otherwise it is not defined + * how the SDMA unit handles the DMA request. + * + * SDMA units are present on devices starting at imx35 but the imx35 + * reference manual states that the DMA bits should not be changed + * while the SSI unit is running (SSIEN). So we support the necessary + * online configuration of fsl-ssi starting at imx51. + */ +static bool fsl_ssi_offline_config(struct fsl_ssi_private *ssi_private) +{ + switch (ssi_private->hw_type) { + case FSL_SSI_MCP8610: + case FSL_SSI_MX21: + case FSL_SSI_MX35: + return true; + case FSL_SSI_MX51: + return false; + } + + return true; +} + /** * fsl_ssi_isr: SSI interrupt handler * @@ -290,7 +332,7 @@ static void fsl_ssi_config(struct fsl_ssi_private *ssi_private, bool enable, * reconfiguration, so we have to enable all necessary flags at once * even if we do not use them later (capture and playback configuration) */ - if (ssi_private->offline_config) { + if (fsl_ssi_offline_config(ssi_private)) { if ((enable && !nr_active_streams) || (!enable && nr_active_streams == 1)) fsl_ssi_rxtx_config(ssi_private, enable); @@ -363,7 +405,7 @@ static void fsl_ssi_setup_reg_vals(struct fsl_ssi_private *ssi_private) reg->tx.stcr = CCSR_SSI_STCR_TFEN0; reg->tx.scr = 0;

- if (!ssi_private->imx_ac97) { + if (!fsl_ssi_is_ac97(ssi_private)) { reg->rx.scr = CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_RE; reg->rx.sier |= CCSR_SSI_SIER_RFF0_EN; reg->tx.scr = CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE; @@ -428,7 +470,7 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream, snd_soc_dai_get_drvdata(rtd->cpu_dai); unsigned long flags;

- if (!dai->active && !ssi_private->imx_ac97) { + if (!dai->active && !fsl_ssi_is_ac97(ssi_private)) { spin_lock_irqsave(&ssi_private->baudclk_lock, flags); ssi_private->baudclk_locked = false; spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags); @@ -494,7 +536,7 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream, else write_ssi_mask(&ssi->srccr, CCSR_SSI_SxCCR_WL_MASK, wl);

- if (!ssi_private->imx_ac97) + if (!fsl_ssi_is_ac97(ssi_private)) write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_NET | CCSR_SSI_SCR_I2S_MODE_MASK, channels == 1 ? 0 : ssi_private->i2s_mode); @@ -512,6 +554,8 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) u32 strcr = 0, stcr, srcr, scr, mask; u8 wm;

+ ssi_private->dai_fmt = fmt; + fsl_ssi_setup_reg_vals(ssi_private);

scr = read_ssi(&ssi->scr) & ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK); @@ -810,7 +854,7 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, else fsl_ssi_rx_config(ssi_private, false);

- if (!ssi_private->imx_ac97 && (read_ssi(&ssi->scr) & + if (!fsl_ssi_is_ac97(ssi_private) && (read_ssi(&ssi->scr) & (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0) { spin_lock_irqsave(&ssi_private->baudclk_lock, flags); ssi_private->baudclk_locked = false; @@ -822,7 +866,7 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, return -EINVAL; }

- if (ssi_private->imx_ac97) { + if (fsl_ssi_is_ac97(ssi_private)) { if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) write_ssi(CCSR_SSI_SOR_TX_CLR, &ssi->sor); else @@ -836,7 +880,7 @@ static int fsl_ssi_dai_probe(struct snd_soc_dai *dai) { struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(dai);

- if (ssi_private->ssi_on_imx && ssi_private->use_dma) { + if (fsl_ssi_on_imx(ssi_private) && ssi_private->use_dma) { dai->playback_dma_data = &ssi_private->dma_params_tx; dai->capture_dma_data = &ssi_private->dma_params_rx; } @@ -1114,7 +1158,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) sizeof(fsl_ssi_ac97_dai));

fsl_ac97_data = ssi_private; - ssi_private->imx_ac97 = true;

snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev); } else { @@ -1163,36 +1206,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)

dev_set_drvdata(&pdev->dev, ssi_private);

- /* - * imx51 and later SoCs have a slightly different IP that allows the - * SSI configuration while the SSI unit is running. - * - * More important, it is necessary on those SoCs to configure the - * sperate TX/RX DMA bits just before starting the stream - * (fsl_ssi_trigger). The SDMA unit has to be configured before fsl_ssi - * sends any DMA requests to the SDMA unit, otherwise it is not defined - * how the SDMA unit handles the DMA request. - * - * SDMA units are present on devices starting at imx35 but the imx35 - * reference manual states that the DMA bits should not be changed - * while the SSI unit is running (SSIEN). So we support the necessary - * online configuration of fsl-ssi starting at imx51. - */ - switch (hw_type) { - case FSL_SSI_MCP8610: - case FSL_SSI_MX21: - case FSL_SSI_MX35: - ssi_private->offline_config = true; - break; - case FSL_SSI_MX51: - ssi_private->offline_config = false; - break; - } - - if (hw_type == FSL_SSI_MX21 || hw_type == FSL_SSI_MX51 || - hw_type == FSL_SSI_MX35) { - ssi_private->ssi_on_imx = true; - + if (fsl_ssi_on_imx(ssi_private)) { ret = fsl_ssi_imx_probe(pdev, ssi_private, ssi_private->ssi); if (ret) goto error_irqmap; @@ -1207,7 +1221,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)

if (ssi_private->use_dma) { ret = devm_request_irq(&pdev->dev, ssi_private->irq, - fsl_ssi_isr, 0, ssi_private->name, + fsl_ssi_isr, 0, dev_name(&pdev->dev), ssi_private); if (ret < 0) { dev_err(&pdev->dev, "could not claim irq %u\n", @@ -1225,10 +1239,8 @@ static int fsl_ssi_probe(struct platform_device *pdev) * that the machine driver uses new binding which does not require * SSI driver to trigger machine driver's probe. */ - if (!of_get_property(np, "codec-handle", NULL)) { - ssi_private->new_binding = true; + if (!of_get_property(np, "codec-handle", NULL)) goto done; - }

/* Trigger the machine driver's probe function. The platform driver * name of the machine driver is taken from /compatible property of the @@ -1261,9 +1273,8 @@ error_irq: snd_soc_unregister_component(&pdev->dev);

error_asoc_register: - if (ssi_private->ssi_on_imx) { + if (fsl_ssi_on_imx(ssi_private)) fsl_ssi_imx_clean(pdev, ssi_private); - }

error_irqmap: if (ssi_private->use_dma) @@ -1278,11 +1289,11 @@ static int fsl_ssi_remove(struct platform_device *pdev)

fsl_ssi_debugfs_remove(&ssi_private->dbg_stats);

- if (!ssi_private->new_binding) + if (ssi_private->pdev) platform_device_unregister(ssi_private->pdev); snd_soc_unregister_component(&pdev->dev);

- if (ssi_private->ssi_on_imx) + if (fsl_ssi_on_imx(ssi_private)) fsl_ssi_imx_clean(pdev, ssi_private);

if (ssi_private->use_dma)

The bits we have to clear when disabling are different when the other stream is still active.

This patch fixes the calculation of new register values after disabling one stream. It also adds a more detailed description of the new register value calculation.

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 40 +++++++++++++++++++++++++++++++++++----- 1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index c8002d3..0d10b7e 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -329,6 +329,26 @@ static void fsl_ssi_rxtx_config(struct fsl_ssi_private *ssi_private, }

/* + * Calculate the bits that have to be disabled for the current stream that is + * getting disabled. This keeps the bits enabled that are necessary for the + * second stream to work if 'stream_active' is true. + * + * Detailed calculation: + * These are the values that need to be active after disabling. For non-active + * second stream, this is 0: + * vals_stream * !!stream_active + * + * The following computes the overall differences between the setup for the + * to-disable stream and the active stream, a simple XOR: + * vals_disable ^ (vals_stream * !!(stream_active)) + * + * The full expression adds a mask on all values we care about + */ +#define fsl_ssi_disable_val(vals_disable, vals_stream, stream_active) \ + ((vals_disable) & \ + ((vals_disable) ^ ((vals_stream) * (u32)!!(stream_active)))) + +/* * Enable/Disable a ssi configuration. You have to pass either * ssi_private->rxtx_reg_val.rx or tx as vals parameter. */ @@ -340,6 +360,12 @@ static void fsl_ssi_config(struct fsl_ssi_private *ssi_private, bool enable, u32 scr_val = read_ssi(&ssi->scr); int nr_active_streams = !!(scr_val & CCSR_SSI_SCR_TE) + !!(scr_val & CCSR_SSI_SCR_RE); + int keep_active; + + if (nr_active_streams - 1 > 0) + keep_active = 1; + else + keep_active = 0;

/* Find the other direction values rx or tx which we do not want to * modify */ @@ -350,7 +376,8 @@ static void fsl_ssi_config(struct fsl_ssi_private *ssi_private, bool enable,

/* If vals should be disabled, start with disabling the unit */ if (!enable) { - u32 scr = vals->scr & (vals->scr ^ avals->scr); + u32 scr = fsl_ssi_disable_val(vals->scr, avals->scr, + keep_active); write_ssi_mask(&ssi->scr, scr, 0); }

@@ -361,7 +388,7 @@ static void fsl_ssi_config(struct fsl_ssi_private *ssi_private, bool enable, */ if (fsl_ssi_offline_config(ssi_private)) { if ((enable && !nr_active_streams) || - (!enable && nr_active_streams == 1)) + (!enable && !keep_active)) fsl_ssi_rxtx_config(ssi_private, enable);

goto config_done; @@ -390,9 +417,12 @@ static void fsl_ssi_config(struct fsl_ssi_private *ssi_private, bool enable, */

/* These assignments are simply vals without bits set in avals*/ - sier = vals->sier & (vals->sier ^ avals->sier); - srcr = vals->srcr & (vals->srcr ^ avals->srcr); - stcr = vals->stcr & (vals->stcr ^ avals->stcr); + sier = fsl_ssi_disable_val(vals->sier, avals->sier, + keep_active); + srcr = fsl_ssi_disable_val(vals->srcr, avals->srcr, + keep_active); + stcr = fsl_ssi_disable_val(vals->stcr, avals->stcr, + keep_active);

write_ssi_mask(&ssi->srcr, srcr, 0); write_ssi_mask(&ssi->stcr, stcr, 0);

The old fsl_ssi_setup function was replaced by a set_dai_fmt function. As the fsl-ssi driver has a 'fsl,mode' DT binding we should keep the backward compatibility for the moment.

This patch sets default dai-fmt for backwards compatibility and initializes the DAI using _fsl_ssi_set_dai_fmt().

The fsl,mode property parsing is moved, so it can directly set the correct dai-fmt in ssi_private.

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 43 ++++++++++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 15 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index ab17055..bb6d607 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -600,12 +600,9 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream, return 0; }

-/** - * fsl_ssi_set_dai_fmt - configure Digital Audio Interface Format. - */ -static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private, + unsigned int fmt) { - struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); struct ccsr_ssi __iomem *ssi = ssi_private->ssi; u32 strcr = 0, stcr, srcr, scr, mask; u8 wm; @@ -746,6 +743,17 @@ static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) fsl_ssi_setup_ac97(ssi_private);

return 0; + +} + +/** + * fsl_ssi_set_dai_fmt - configure Digital Audio Interface Format. + */ +static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +{ + struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai); + + return _fsl_ssi_set_dai_fmt(ssi_private, fmt); }

/** @@ -1199,7 +1207,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) const uint32_t *iprop; struct resource res; char name[64]; - bool ac97 = false;

/* SSIs that are not connected on the board should have a * status = "disabled" @@ -1213,14 +1220,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) return -EINVAL; hw_type = (enum fsl_ssi_type) of_id->data;

- sprop = of_get_property(np, "fsl,mode", NULL); - if (!sprop) { - dev_err(&pdev->dev, "fsl,mode property is necessary\n"); - return -EINVAL; - } - if (!strcmp(sprop, "ac97-slave")) - ac97 = true; - ssi_private = devm_kzalloc(&pdev->dev, sizeof(*ssi_private), GFP_KERNEL); if (!ssi_private) { @@ -1228,11 +1227,22 @@ static int fsl_ssi_probe(struct platform_device *pdev) return -ENOMEM; }

+ sprop = of_get_property(np, "fsl,mode", NULL); + if (!sprop) { + dev_err(&pdev->dev, "fsl,mode property is necessary\n"); + return -EINVAL; + } + if (!strcmp(sprop, "ac97-slave")) + ssi_private->dai_fmt = SND_SOC_DAIFMT_AC97; + else if (!strcmp(sprop, "i2s-slave")) + ssi_private->dai_fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_CBM_CFM; + ssi_private->use_dma = !of_property_read_bool(np, "fsl,fiq-stream-filter"); ssi_private->hw_type = hw_type;

- if (ac97) { + if (fsl_ssi_is_ac97(ssi_private)) { memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_ac97_dai, sizeof(fsl_ssi_ac97_dai));

@@ -1342,6 +1352,9 @@ static int fsl_ssi_probe(struct platform_device *pdev) }

done: + if (ssi_private->dai_fmt) + _fsl_ssi_set_dai_fmt(ssi_private, ssi_private->dai_fmt); + return 0;

error_sound_card:

A lot of bindings where changed without an update of the binding documentation. This patch adds those changes to the documentation.

Signed-off-by: Markus Pargmann mpa@pengutronix.de --- Documentation/devicetree/bindings/sound/fsl,ssi.txt | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl,ssi.txt b/Documentation/devicetree/bindings/sound/fsl,ssi.txt index b93e9a9..3aa4a8f 100644 --- a/Documentation/devicetree/bindings/sound/fsl,ssi.txt +++ b/Documentation/devicetree/bindings/sound/fsl,ssi.txt @@ -20,15 +20,6 @@ Required properties: have. - interrupt-parent: The phandle for the interrupt controller that services interrupts for this device. -- fsl,mode: The operating mode for the SSI interface. - "i2s-slave" - I2S mode, SSI is clock slave - "i2s-master" - I2S mode, SSI is clock master - "lj-slave" - left-justified mode, SSI is clock slave - "lj-master" - l.j. mode, SSI is clock master - "rj-slave" - right-justified mode, SSI is clock slave - "rj-master" - r.j., SSI is clock master - "ac97-slave" - AC97 mode, SSI is clock slave - "ac97-master" - AC97 mode, SSI is clock master - fsl,playback-dma: Phandle to a node for the DMA channel to use for playback of audio. This is typically dictated by SOC design. See the notes below. @@ -47,6 +38,9 @@ Required properties: be connected together, and SRFS and STFS be connected together. This would still allow different sample sizes, but not different sample rates. + - clocks: "ipg" - Required clock for the SSI unit + "baud" - Required clock for SSI master mode. Otherwise this + clock is not used

Required are also ac97 link bindings if ac97 is used. See Documentation/devicetree/bindings/sound/soc-ac97link.txt for the necessary @@ -64,6 +58,15 @@ Optional properties: Documentation/devicetree/bindings/dma/dma.txt. - dma-names: Two dmas have to be defined, "tx" and "rx", if fsl,imx-fiq is not defined. +- fsl,mode: The operating mode for the SSI interface. + "i2s-slave" - I2S mode, SSI is clock slave + "i2s-master" - I2S mode, SSI is clock master + "lj-slave" - left-justified mode, SSI is clock slave + "lj-master" - l.j. mode, SSI is clock master + "rj-slave" - right-justified mode, SSI is clock slave + "rj-master" - r.j., SSI is clock master + "ac97-slave" - AC97 mode, SSI is clock slave + "ac97-master" - AC97 mode, SSI is clock master

Child 'codec' node required properties: - compatible: Compatible list, contains the name of the codec