Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9428
-gerrit
commit 2a9420360bc41fa91d6acbf6e3548675b09ea81d Author: Tom Warren twarren@nvidia.com Date: Fri Nov 14 15:42:42 2014 -0700
tegra132: Add routine to enable all audio periphs under AHUB
If all devices under AHUB (AUDIO/I2S/DAM/ADX/etc) aren't clocked and taken out of reset, any access to any audio peripheral will hang the system.
BUG=none BRANCH=none TEST=built both Rush and Ryu OK.
Change-Id: Iee8e33f005c5abaf09a14104c0b243b06eb4af24 Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: 0016bd533864942225f2fb8e08ce871a186f2746 Original-Change-Id: I741d5ba4dd8bd963b6d261fbf41cfb77c274cb79 Original-Signed-off-by: Tom Warren twarren@nvidia.com Original-Reviewed-on: https://chromium-review.googlesource.com/229910 Original-Reviewed-by: Aaron Durbin adurbin@chromium.org Original-Commit-Queue: Mike Frysinger vapier@chromium.org --- src/soc/nvidia/tegra132/clock.c | 18 ++++++++++++++++++ src/soc/nvidia/tegra132/include/soc/clock.h | 1 + 2 files changed, 19 insertions(+)
diff --git a/src/soc/nvidia/tegra132/clock.c b/src/soc/nvidia/tegra132/clock.c index 0d37851..49c2f19 100644 --- a/src/soc/nvidia/tegra132/clock.c +++ b/src/soc/nvidia/tegra132/clock.c @@ -709,3 +709,21 @@ void clock_reset_x(u32 bit) clock_reset_dev(CLK_RST_REG(rst_dev_x_set), CLK_RST_REG(rst_dev_x_clr), bit); } + +/* Enable/unreset all audio toys under AHUB */ +void clock_enable_audio(void) +{ + /* + * Confirmed by NVIDIA hardware team, we need to take ALL audio devices + * connected to AHUB (AUDIO, APBIF, I2S, DAM, AMX, ADX, SPDIF, AFC) out + * of reset and clock-enabled, otherwise reading AHUB devices (in our + * case, I2S/APBIF/AUDIO<XBAR>) will hang. + */ + clock_enable_clear_reset(CLK_L_I2S0 | CLK_L_I2S1 | CLK_L_I2S2 | CLK_L_SPDIF, + 0, 0, + CLK_V_I2S3 | CLK_V_I2S4 | CLK_V_AUDIO | CLK_V_APBIF | + CLK_V_DAM0 | CLK_V_DAM1 | CLK_V_DAM2 | CLK_V_EXTPERIPH1, + CLK_W_AMX0 | CLK_W_ADX0, + CLK_X_ADX1 | CLK_X_AFC0 | CLK_X_AFC1 | CLK_X_AFC2 | + CLK_X_AFC3 | CLK_X_AFC4 | CLK_X_AFC5 | CLK_X_AMX1); +} diff --git a/src/soc/nvidia/tegra132/include/soc/clock.h b/src/soc/nvidia/tegra132/include/soc/clock.h index 0f01182..f0d05e1 100644 --- a/src/soc/nvidia/tegra132/include/soc/clock.h +++ b/src/soc/nvidia/tegra132/include/soc/clock.h @@ -394,6 +394,7 @@ void clock_init(void); void clock_init_arm_generic_timer(void); void sor_clock_stop(void); void sor_clock_start(void); +void clock_enable_audio(void);
#endif /* __SOC_NVIDIA_TEGRA132_CLOCK_H__ */