Support generating a DMAR table and add a few helper routines as well. Also set up NHLT so that audio works.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v4: Drop extra acpi_align() in apl_acpi_hb_write_tables()
Changes in v1: - Add support for NHLT table - Capitalise ACPI_OPS_PTR - Move the acpi.h header file to this commit - Update commit message
arch/x86/cpu/apollolake/hostbridge.c | 220 +++++++++++++++++++++++++-- 1 file changed, 211 insertions(+), 9 deletions(-)
diff --git a/arch/x86/cpu/apollolake/hostbridge.c b/arch/x86/cpu/apollolake/hostbridge.c index 056f7e57a9a..7fd67dcfb6e 100644 --- a/arch/x86/cpu/apollolake/hostbridge.c +++ b/arch/x86/cpu/apollolake/hostbridge.c @@ -1,17 +1,45 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright 2019 Google LLC + * Copyright (C) 2015 - 2017 Intel Corp. + * Copyright (C) 2017 - 2019 Siemens AG + * (Written by Alexandru Gagniuc alexandrux.gagniuc@intel.com for Intel Corp.) + * (Written by Andrey Petrov andrey.petrov@intel.com for Intel Corp.) + * + * Portions from coreboot soc/intel/apollolake/chip.c */
+#define LOG_CATEGORY UCLASS_NORTHBRIDGE + #include <common.h> #include <dm.h> #include <dt-structs.h> #include <log.h> #include <spl.h> +#include <tables_csum.h> +#include <acpi/acpi_table.h> +#include <asm/acpi_nhlt.h> #include <asm/intel_pinctrl.h> #include <asm/intel_regs.h> +#include <asm/io.h> #include <asm/pci.h> +#include <asm/arch/acpi.h> #include <asm/arch/systemagent.h> +#include <dt-bindings/sound/nhlt.h> +#include <dm/acpi.h> + +enum { + PCIEXBAR = 0x60, + PCIEXBAR_LENGTH_256MB = 0, + PCIEXBAR_LENGTH_128MB, + PCIEXBAR_LENGTH_64MB, + + PCIEXBAR_PCIEXBAREN = 1 << 0, + + BGSM = 0xb4, /* Base GTT Stolen Memory */ + TSEG = 0xb8, /* TSEG base */ + TOLUD = 0xbc, +};
/** * struct apl_hostbridge_platdata - platform data for hostbridge @@ -32,17 +60,100 @@ struct apl_hostbridge_platdata { pci_dev_t bdf; };
-enum { - PCIEXBAR = 0x60, - PCIEXBAR_LENGTH_256MB = 0, - PCIEXBAR_LENGTH_128MB, - PCIEXBAR_LENGTH_64MB, +static const struct nhlt_format_config dmic_1ch_formats[] = { + /* 48 KHz 16-bits per sample. */ + { + .num_channels = 1, + .sample_freq_khz = 48, + .container_bits_per_sample = 16, + .valid_bits_per_sample = 16, + .settings_file = "dmic-1ch-48khz-16b.dat", + }, +};
- PCIEXBAR_PCIEXBAREN = 1 << 0, +static const struct nhlt_dmic_array_config dmic_1ch_mic_config = { + .tdm_config = { + .config_type = NHLT_TDM_MIC_ARRAY, + }, + .array_type = NHLT_MIC_ARRAY_VENDOR_DEFINED, +};
- BGSM = 0xb4, /* Base GTT Stolen Memory */ - TSEG = 0xb8, /* TSEG base */ - TOLUD = 0xbc, +static const struct nhlt_endp_descriptor dmic_1ch_descriptors[] = { + { + .link = NHLT_LINK_PDM, + .device = NHLT_PDM_DEV, + .direction = NHLT_DIR_CAPTURE, + .vid = NHLT_VID, + .did = NHLT_DID_DMIC, + .cfg = &dmic_1ch_mic_config, + .cfg_size = sizeof(dmic_1ch_mic_config), + .formats = dmic_1ch_formats, + .num_formats = ARRAY_SIZE(dmic_1ch_formats), + }, +}; + +static const struct nhlt_format_config dmic_2ch_formats[] = { + /* 48 KHz 16-bits per sample. */ + { + .num_channels = 2, + .sample_freq_khz = 48, + .container_bits_per_sample = 16, + .valid_bits_per_sample = 16, + .settings_file = "dmic-2ch-48khz-16b.dat", + }, +}; + +static const struct nhlt_dmic_array_config dmic_2ch_mic_config = { + .tdm_config = { + .config_type = NHLT_TDM_MIC_ARRAY, + }, + .array_type = NHLT_MIC_ARRAY_2CH_SMALL, +}; + +static const struct nhlt_endp_descriptor dmic_2ch_descriptors[] = { + { + .link = NHLT_LINK_PDM, + .device = NHLT_PDM_DEV, + .direction = NHLT_DIR_CAPTURE, + .vid = NHLT_VID, + .did = NHLT_DID_DMIC, + .cfg = &dmic_2ch_mic_config, + .cfg_size = sizeof(dmic_2ch_mic_config), + .formats = dmic_2ch_formats, + .num_formats = ARRAY_SIZE(dmic_2ch_formats), + }, +}; + +static const struct nhlt_format_config dmic_4ch_formats[] = { + /* 48 KHz 16-bits per sample. */ + { + .num_channels = 4, + .sample_freq_khz = 48, + .container_bits_per_sample = 16, + .valid_bits_per_sample = 16, + .settings_file = "dmic-4ch-48khz-16b.dat", + }, +}; + +static const struct nhlt_dmic_array_config dmic_4ch_mic_config = { + .tdm_config = { + .config_type = NHLT_TDM_MIC_ARRAY, + }, + .array_type = NHLT_MIC_ARRAY_4CH_L_SHAPED, +}; + +static const struct nhlt_endp_descriptor dmic_4ch_descriptors[] = { + { + .link = NHLT_LINK_PDM, + .device = NHLT_PDM_DEV, + .direction = NHLT_DIR_CAPTURE, + .vid = NHLT_VID, + .did = NHLT_DID_DMIC, + .cfg = &dmic_4ch_mic_config, + .cfg_size = sizeof(dmic_4ch_mic_config), + .formats = dmic_4ch_formats, + .num_formats = ARRAY_SIZE(dmic_4ch_formats), + }, };
static int apl_hostbridge_early_init_pinctrl(struct udevice *dev) @@ -167,6 +278,86 @@ static int apl_hostbridge_probe(struct udevice *dev) return 0; }
+static int apl_acpi_hb_get_name(const struct udevice *dev, char *out_name) +{ + return acpi_copy_name(out_name, "RHUB"); +} + +#ifdef CONFIG_GENERATE_ACPI_TABLE +static int apl_acpi_hb_write_tables(const struct udevice *dev, + struct acpi_ctx *ctx) +{ + struct acpi_table_header *header; + struct acpi_dmar *dmar; + u32 val; + + /* + * Create DMAR table only if virtualization is enabled. Due to some + * constraints on Apollo Lake SoC (some stepping affected), VTD could + * not be enabled together with IPU. Doing so will override and disable + * VTD while leaving CAPID0_A still reporting that VTD is available. + * As in this case FSP will lock VTD to disabled state, we need to make + * sure that DMAR table generation only happens when at least DEFVTBAR + * is enabled. Otherwise the DMAR header will be generated while the + * content of the table will be missing. + */ + dm_pci_read_config32(dev, CAPID0_A, &val); + if ((val & VTD_DISABLE) || + !(readl(MCHBAR_REG(DEFVTBAR)) & VTBAR_ENABLED)) + return 0; + + log_debug("ACPI: * DMAR\n"); + dmar = (struct acpi_dmar *)ctx->current; + header = &dmar->header; + acpi_create_dmar(dmar, DMAR_INTR_REMAP); + ctx->current += sizeof(struct acpi_dmar); + apl_acpi_fill_dmar(ctx); + + /* (Re)calculate length and checksum */ + header->length = ctx->current - (void *)dmar; + header->checksum = table_compute_checksum((void *)dmar, header->length); + + acpi_align(ctx); + acpi_add_table(ctx, dmar); + + return 0; +} +#endif + +static int apl_acpi_setup_nhlt(const struct udevice *dev, struct acpi_ctx *ctx) +{ + struct nhlt *nhlt = ctx->nhlt; + u32 channels; + ofnode node; + + node = ofnode_find_subnode(dev_ofnode(dev), "nhlt"); + if (ofnode_read_u32(node, "intel,dmic-channels", &channels)) + return log_msg_ret("channels", -EINVAL); + switch (channels) { + case 1: + return nhlt_add_endpoints(nhlt, dmic_1ch_descriptors, + ARRAY_SIZE(dmic_1ch_descriptors)); + case 2: + return nhlt_add_endpoints(nhlt, dmic_2ch_descriptors, + ARRAY_SIZE(dmic_2ch_descriptors)); + case 4: + return nhlt_add_endpoints(nhlt, dmic_4ch_descriptors, + ARRAY_SIZE(dmic_4ch_descriptors)); + } + + return log_msg_ret("channels", -EINVAL); +} + +static int apl_hostbridge_remove(struct udevice *dev) +{ + /* + * TODO(sjg@chromium.org): Consider adding code from coreboot's + * platform_fsp_notify_status() + */ + + return 0; +} + static ulong sa_read_reg(struct udevice *dev, int reg) { u32 val; @@ -192,6 +383,14 @@ ulong sa_get_tseg_base(struct udevice *dev) return sa_read_reg(dev, TSEG); }
+struct acpi_ops apl_hostbridge_acpi_ops = { + .get_name = apl_acpi_hb_get_name, +#ifdef CONFIG_GENERATE_ACPI_TABLE + .write_tables = apl_acpi_hb_write_tables, +#endif + .setup_nhlt = apl_acpi_setup_nhlt, +}; + static const struct udevice_id apl_hostbridge_ids[] = { { .compatible = "intel,apl-hostbridge" }, { } @@ -203,5 +402,8 @@ U_BOOT_DRIVER(apl_hostbridge_drv) = { .of_match = apl_hostbridge_ids, .ofdata_to_platdata = apl_hostbridge_ofdata_to_platdata, .probe = apl_hostbridge_probe, + .remove = apl_hostbridge_remove, .platdata_auto_alloc_size = sizeof(struct apl_hostbridge_platdata), + ACPI_OPS_PTR(&apl_hostbridge_acpi_ops) + .flags = DM_FLAG_OS_PREPARE, };