Add a way check to whether HD audio is enabled. Use ioctl() to avoid
adding too many unusual operations to PCH.
Signed-off-by: Simon Glass <s...@chromium.org>
Reviewed-by: Bin Meng <bmeng...@gmail.com>
---
Changes in v2:
- Adjust code to use #defines instead of open-coded values
arch/x86/cpu/ivybridge/bd82x6x.c | 27 +++++++++++++++++++++++++--
include/pch.h | 3 +++
2 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index a78bb025440..ed9bce64168 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -20,8 +20,12 @@
DECLARE_GLOBAL_DATA_PTR;
-#define GPIO_BASE 0x48
-#define BIOS_CTRL 0xdc
+#define GPIO_BASE 0x48
+#define BIOS_CTRL 0xdc
+
+#define RCBA_AUDIO_CONFIG 0x2030
+#define RCBA_AUDIO_CONFIG_HDA BIT(31)
+#define RCBA_AUDIO_CONFIG_MASK 0xfe
#ifndef CONFIG_HAVE_FSP
static int pch_revision_id = -1;
@@ -212,10 +216,29 @@ static int bd82x6x_get_gpio_base(struct udevice *dev, u32
*gbasep)
return 0;
}
+static int bd82x6x_ioctl(struct udevice *dev, enum pch_req_t req, void *data,
+ int size)
+{
+ u32 rcba, val;
+
+ switch (req) {
+ case PCH_REQ_HDA_CONFIG:
+ dm_pci_read_config32(dev, PCH_RCBA, &rcba);
+ val = readl(rcba + RCBA_AUDIO_CONFIG);
+ if (!(val & RCBA_AUDIO_CONFIG_HDA))
+ return -ENOENT;
+
+ return val & RCBA_AUDIO_CONFIG_MASK;
+ default:
+ return -ENOSYS;
+ }
+}
+
static const struct pch_ops bd82x6x_pch_ops = {
.get_spi_base = bd82x6x_pch_get_spi_base,
.set_spi_protect = bd82x6x_set_spi_protect,
.get_gpio_base = bd82x6x_get_gpio_base,
+ .ioctl = bd82x6x_ioctl,
};
static const struct udevice_id bd82x6x_ids[] = {
diff --git a/include/pch.h b/include/pch.h
index b8b62d74acb..046a5fde3ab 100644
--- a/include/pch.h
+++ b/include/pch.h
@@ -13,6 +13,9 @@
/* All the supported PCH ioctls */
enum pch_req_t {
+ /* Returns HDA config info if Azalia V1CTL enabled, -ENOENT if not */
+ PCH_REQ_HDA_CONFIG,
+
PCH_REQ_TEST1, /* Test requests for sandbox driver */
PCH_REQ_TEST2,
PCH_REQ_TEST3,
--
2.21.0.rc0.258.g878e2cd30e-goog
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
