The SCRATCH registers are used by firmwares to hold diagnostic information. Log this during shutdown to assist analysis and debug of firmwares.

Signed-off-by: Richard Fitzgerald rf@opensource.wolfsonmicro.com --- sound/soc/codecs/wm_adsp.c | 27 +++++++++++++++++++++++++++ 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index f6642c1..6e7a7000 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -121,6 +121,11 @@ #define ADSP2_WDMA_CONFIG_2 0x31 #define ADSP2_RDMA_CONFIG_1 0x34

+#define ADSP2_SCRATCH0 0x40 +#define ADSP2_SCRATCH1 0x41 +#define ADSP2_SCRATCH2 0x42 +#define ADSP2_SCRATCH3 0x43 + /* * ADSP2 Control */ @@ -364,6 +369,25 @@ static unsigned int wm_adsp_region_to_reg(struct wm_adsp_region const *mem, } }

+static void wm_adsp2_show_fw_status(struct wm_adsp *dsp) +{ + u16 scratch[4]; + int ret; + + ret = regmap_raw_read(dsp->regmap, dsp->base + ADSP2_SCRATCH0, + scratch, sizeof(scratch)); + if (ret) { + adsp_err(dsp, "Failed to read SCRATCH regs: %d\n", ret); + return; + } + + adsp_info(dsp, "FW SCRATCH 0:0x%x 1:0x%x 2:0x%x 3:0x%x\n", + be16_to_cpu(scratch[0]), + be16_to_cpu(scratch[1]), + be16_to_cpu(scratch[2]), + be16_to_cpu(scratch[3])); +} + static int wm_coeff_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { @@ -1898,6 +1922,9 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, break;

case SND_SOC_DAPM_PRE_PMD: + /* Log firmware state, it can be useful for analysis */ + wm_adsp2_show_fw_status(dsp); + dsp->running = false;

regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,