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ASoC: samsung: i2s: Protect more registers with a spinlock
Ensure the I2SMOD, I2SPSR registers, which are also exposed through clk API are only accessed with the i2s->spinlock spinlock held. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sylwester Nawrocki
Mark Brown
parent
f36705366a
commit
ce8bcdbb61
@ -472,17 +472,22 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
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{
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struct i2s_dai *i2s = to_info(dai);
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struct i2s_dai *other = get_other_dai(i2s);
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u32 mod = readl(i2s->addr + I2SMOD);
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const struct samsung_i2s_variant_regs *i2s_regs = i2s->variant_regs;
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unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
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unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
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u32 mod, mask, val = 0;
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spin_lock(i2s->lock);
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mod = readl(i2s->addr + I2SMOD);
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spin_unlock(i2s->lock);
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switch (clk_id) {
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case SAMSUNG_I2S_OPCLK:
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mod &= ~MOD_OPCLK_MASK;
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mod |= dir;
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mask = MOD_OPCLK_MASK;
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val = dir;
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break;
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case SAMSUNG_I2S_CDCLK:
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mask = 1 << i2s_regs->cdclkcon_off;
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/* Shouldn't matter in GATING(CLOCK_IN) mode */
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if (dir == SND_SOC_CLOCK_IN)
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rfs = 0;
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@ -499,15 +504,15 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
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}
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if (dir == SND_SOC_CLOCK_IN)
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mod |= 1 << i2s_regs->cdclkcon_off;
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else
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mod &= ~(1 << i2s_regs->cdclkcon_off);
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val = 1 << i2s_regs->cdclkcon_off;
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i2s->rfs = rfs;
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break;
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case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
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case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
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mask = 1 << i2s_regs->rclksrc_off;
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if ((i2s->quirks & QUIRK_NO_MUXPSR)
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|| (clk_id == SAMSUNG_I2S_RCLKSRC_0))
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clk_id = 0;
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@ -557,18 +562,19 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
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return 0;
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}
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if (clk_id == 0)
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mod &= ~(1 << i2s_regs->rclksrc_off);
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else
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mod |= 1 << i2s_regs->rclksrc_off;
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if (clk_id == 1)
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val = 1 << i2s_regs->rclksrc_off;
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break;
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default:
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dev_err(&i2s->pdev->dev, "We don't serve that!\n");
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return -EINVAL;
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}
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spin_lock(i2s->lock);
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mod = readl(i2s->addr + I2SMOD);
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mod = (mod & ~mask) | val;
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writel(mod, i2s->addr + I2SMOD);
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spin_unlock(i2s->lock);
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return 0;
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}
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@ -577,9 +583,8 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
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unsigned int fmt)
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{
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struct i2s_dai *i2s = to_info(dai);
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u32 mod = readl(i2s->addr + I2SMOD);
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int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
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u32 tmp = 0;
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u32 mod, tmp = 0;
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lrp_shift = i2s->variant_regs->lrp_off;
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sdf_shift = i2s->variant_regs->sdf_off;
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@ -639,12 +644,15 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
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return -EINVAL;
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}
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spin_lock(i2s->lock);
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mod = readl(i2s->addr + I2SMOD);
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/*
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* Don't change the I2S mode if any controller is active on this
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* channel.
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*/
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if (any_active(i2s) &&
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((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
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spin_unlock(i2s->lock);
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dev_err(&i2s->pdev->dev,
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"%s:%d Other DAI busy\n", __func__, __LINE__);
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return -EAGAIN;
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@ -653,6 +661,7 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
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mod &= ~(sdf_mask | lrp_rlow | mod_slave);
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mod |= tmp;
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writel(mod, i2s->addr + I2SMOD);
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spin_unlock(i2s->lock);
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return 0;
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}
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@ -661,16 +670,16 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
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{
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struct i2s_dai *i2s = to_info(dai);
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u32 mod = readl(i2s->addr + I2SMOD);
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u32 mod, mask = 0, val = 0;
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if (!is_secondary(i2s))
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mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
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mask |= (MOD_DC2_EN | MOD_DC1_EN);
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switch (params_channels(params)) {
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case 6:
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mod |= MOD_DC2_EN;
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val |= MOD_DC2_EN;
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case 4:
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mod |= MOD_DC1_EN;
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val |= MOD_DC1_EN;
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break;
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case 2:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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@ -692,44 +701,49 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,
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}
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if (is_secondary(i2s))
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mod &= ~MOD_BLCS_MASK;
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mask |= MOD_BLCS_MASK;
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else
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mod &= ~MOD_BLCP_MASK;
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mask |= MOD_BLCP_MASK;
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if (is_manager(i2s))
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mod &= ~MOD_BLC_MASK;
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mask |= MOD_BLC_MASK;
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switch (params_width(params)) {
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case 8:
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if (is_secondary(i2s))
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mod |= MOD_BLCS_8BIT;
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val |= MOD_BLCS_8BIT;
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else
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mod |= MOD_BLCP_8BIT;
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val |= MOD_BLCP_8BIT;
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if (is_manager(i2s))
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mod |= MOD_BLC_8BIT;
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val |= MOD_BLC_8BIT;
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break;
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case 16:
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if (is_secondary(i2s))
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mod |= MOD_BLCS_16BIT;
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val |= MOD_BLCS_16BIT;
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else
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mod |= MOD_BLCP_16BIT;
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val |= MOD_BLCP_16BIT;
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if (is_manager(i2s))
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mod |= MOD_BLC_16BIT;
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val |= MOD_BLC_16BIT;
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break;
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case 24:
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if (is_secondary(i2s))
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mod |= MOD_BLCS_24BIT;
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val |= MOD_BLCS_24BIT;
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else
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mod |= MOD_BLCP_24BIT;
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val |= MOD_BLCP_24BIT;
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if (is_manager(i2s))
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mod |= MOD_BLC_24BIT;
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val |= MOD_BLC_24BIT;
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break;
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default:
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dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
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params_format(params));
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return -EINVAL;
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}
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spin_lock(i2s->lock);
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mod = readl(i2s->addr + I2SMOD);
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mod = (mod & ~mask) | val;
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writel(mod, i2s->addr + I2SMOD);
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spin_unlock(i2s->lock);
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samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
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@ -979,6 +993,7 @@ static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
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{
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struct i2s_dai *i2s = to_info(dai);
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struct i2s_dai *other = get_other_dai(i2s);
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unsigned long flags;
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if (is_secondary(i2s)) { /* If this is probe on the secondary DAI */
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samsung_asoc_init_dma_data(dai, &other->sec_dai->dma_playback,
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@ -999,11 +1014,14 @@ static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
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i2s->rfs = 0;
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i2s->bfs = 0;
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i2s->rclk_srcrate = 0;
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spin_lock_irqsave(i2s->lock, flags);
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i2s_txctrl(i2s, 0);
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i2s_rxctrl(i2s, 0);
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i2s_fifo(i2s, FIC_TXFLUSH);
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i2s_fifo(other, FIC_TXFLUSH);
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i2s_fifo(i2s, FIC_RXFLUSH);
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spin_unlock_irqrestore(i2s->lock, flags);
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/* Gate CDCLK by default */
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if (!is_opened(other))
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@ -1018,8 +1036,11 @@ static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
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struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
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if (!is_secondary(i2s)) {
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if (i2s->quirks & QUIRK_NEED_RSTCLR)
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if (i2s->quirks & QUIRK_NEED_RSTCLR) {
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spin_lock(i2s->lock);
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writel(0, i2s->addr + I2SCON);
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spin_unlock(i2s->lock);
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}
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}
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return 0;
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