diff options
| -rw-r--r-- | src/soc/intel/baytrail/lpe.c | 35 |
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, |