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authorAaron Durbin <adurbin@chromium.org>2013-12-09 12:52:37 -0600
committerKyösti Mälkki <kyosti.malkki@gmail.com>2014-05-09 05:41:20 +0200
commitf4fe3c303ca5fe8124f48973eef2f798771be0fd (patch)
tree1122b702f49413dd62cbd50d13be73be8d6168a6 /src
parentc087a9e46988f1842ec5525607fa19953f9cbbad (diff)
downloadcoreboot-f4fe3c303ca5fe8124f48973eef2f798771be0fd.tar.xz
baytrail: lpe audio device needs memory for its firmware
The LPE audio device needs 1MiB of memory for its firmware. It also has a requirement that the memory needs to be on a 512MiB boundary. Just take 1MiB @ 512MiB for the LPE device. BUG=chrome-os-partner:23791 BRANCH=None TEST=Built and analyzed console logs for resources. Also interrogated registres within the kernel. Change-Id: I4d9ad5c7b5a2f3eb627b30528d738289278b3a7b Reviewed-on: https://chromium-review.googlesource.com/179192 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Signed-off-by: Aaron Durbin <adurbin@chromium.org> Commit-Queue: Aaron Durbin <adurbin@chromium.org> Tested-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/4994 Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/baytrail/lpe.c35
1 files changed, 33 insertions, 2 deletions
diff --git a/src/soc/intel/baytrail/lpe.c b/src/soc/intel/baytrail/lpe.c
index c3bbff46f5..24daf5575d 100644
--- a/src/soc/intel/baytrail/lpe.c
+++ b/src/soc/intel/baytrail/lpe.c
@@ -30,6 +30,13 @@
#include "chip.h"
+/* The LPE audio devices needs 1MiB of memory reserved aligned to a 512MiB
+ * address. Just take 1MiB @ 512MiB. */
+#define FIRMWARE_PHYS_BASE (512 << 20)
+#define FIRMWARE_PHYS_LENGTH (1 << 20)
+#define FIRMWARE_REG_BASE 0xa8
+#define FIRMWARE_REG_LENGTH 0xac
+
static void setup_codec_clock(device_t dev)
{
uint32_t reg;
@@ -73,9 +80,33 @@ static void lpe_init(device_t dev)
setup_codec_clock(dev);
}
+static void lpe_read_resources(device_t dev)
+{
+ pci_dev_read_resources(dev);
+
+ reserved_ram_resource(dev, FIRMWARE_REG_BASE,
+ FIRMWARE_PHYS_BASE >> 10,
+ FIRMWARE_PHYS_LENGTH >> 10);
+}
+
+static void lpe_set_resources(device_t dev)
+{
+ struct resource *res;
+
+ pci_dev_set_resources(dev);
+
+ res = find_resource(dev, FIRMWARE_REG_BASE);
+ if (res == NULL) {
+ printk(BIOS_DEBUG, "LPE Firmware memory not found.\n");
+ return;
+ }
+ pci_write_config32(dev, FIRMWARE_REG_BASE, res->base);
+ pci_write_config32(dev, FIRMWARE_REG_LENGTH, res->size);
+}
+
static const struct device_operations device_ops = {
- .read_resources = pci_dev_read_resources,
- .set_resources = pci_dev_set_resources,
+ .read_resources = lpe_read_resources,
+ .set_resources = lpe_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = lpe_init,
.enable = NULL,