HARSHAPRIYA N (harshapriya.n@intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15528
-gerrit
commit 82e4fa14a5a9f9266486a838a6bf647d400490ca Author: Harsha Priya harshapriya.n@intel.com Date: Fri Jul 1 11:53:05 2016 -0700
apollolake: Add Audio DSP device
Add the Audio DSP device for apollolake as a PCI driver with a static scan_bus handler so generic devices can be declared under it.
This is for devices like the Maxim 98357A which is connected on the I2S bus for data but has no control channel bus and instead just has a GPIO for channel selection and power down control and needs to describe that GPIO connection to the OS via ACPI.
Change-Id: Icb97ccf7d6a9034877614d49166bc9e4fe659b12 --- src/soc/intel/apollolake/Makefile.inc | 1 + src/soc/intel/apollolake/dsp.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc index 7326f14..ae12b08 100644 --- a/src/soc/intel/apollolake/Makefile.inc +++ b/src/soc/intel/apollolake/Makefile.inc @@ -43,6 +43,7 @@ smm-y += uart_early.c ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c ramstage-y += cpu.c ramstage-y += chip.c +ramstage-y += dsp.c ramstage-y += gpio.c ramstage-y += graphics.c ramstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c diff --git a/src/soc/intel/apollolake/dsp.c b/src/soc/intel/apollolake/dsp.c new file mode 100644 index 0000000..ae4723b --- /dev/null +++ b/src/soc/intel/apollolake/dsp.c @@ -0,0 +1,33 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> + +static struct device_operations dsp_dev_ops = { + .read_resources = &pci_dev_read_resources, + .set_resources = &pci_dev_set_resources, + .enable_resources = &pci_dev_enable_resources, + .scan_bus = &scan_static_bus, +}; + +static const struct pci_driver apollolake_dsp __pci_driver = { + .ops = &dsp_dev_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x5a98 +}; + +