x86: broadwell: Add support for the ADSP
The Application Digital Signal Processor is used for sound processing with
broadwell. Add a driver to support this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/broadwell/adsp.c b/arch/x86/cpu/broadwell/adsp.c
new file mode 100644
index 0000000..2ac8cea
--- /dev/null
+++ b/arch/x86/cpu/broadwell/adsp.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for Intel Application Digital Signal Processor
+ *
+ * Copyright 2019 Google LLC
+ *
+ * Modified from coreboot file of the same name
+ */
+
+#define LOG_CATEGORY UCLASS_SYSCON
+
+#include <common.h>
+#include <dm.h>
+#include <pci.h>
+#include <asm/io.h>
+#include <asm/cpu.h>
+#include <asm/intel_regs.h>
+#include <asm/arch/adsp.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/rcb.h>
+
+enum pci_type_t {
+ LYNX_POINT,
+ WILDCAT_POINT,
+};
+
+struct broadwell_adsp_priv {
+ bool adsp_d3_pg_enable;
+ bool adsp_sram_pg_enable;
+ bool sio_acpi_mode;
+};
+
+static int broadwell_adsp_probe(struct udevice *dev)
+{
+ struct broadwell_adsp_priv *priv = dev_get_priv(dev);
+ enum pci_type_t type;
+ u32 bar0, bar1;
+ u32 tmp32;
+
+ /* Find BAR0 and BAR1 */
+ bar0 = dm_pci_read_bar32(dev, 0);
+ if (!bar0)
+ return -EINVAL;
+ bar1 = dm_pci_read_bar32(dev, 1);
+ if (!bar1)
+ return -EINVAL;
+
+ /*
+ * Set LTR value in DSP shim LTR control register to 3ms
+ * SNOOP_REQ[13]=1b SNOOP_SCALE[12:10]=100b (1ms) SNOOP_VAL[9:0]=3h
+ */
+ type = dev_get_driver_data(dev);
+ tmp32 = type == WILDCAT_POINT ? ADSP_SHIM_BASE_WPT : ADSP_SHIM_BASE_LPT;
+ writel(ADSP_SHIM_LTRC_VALUE, bar0 + tmp32);
+
+ /* Program VDRTCTL2 D19:F0:A8[31:0] = 0x00000fff */
+ dm_pci_write_config32(dev, ADSP_PCI_VDRTCTL2, ADSP_VDRTCTL2_VALUE);
+
+ /* Program ADSP IOBP VDLDAT1 to 0x040100 */
+ pch_iobp_write(ADSP_IOBP_VDLDAT1, ADSP_VDLDAT1_VALUE);
+
+ /* Set D3 Power Gating Enable in D19:F0:A0 based on PCH type */
+ dm_pci_read_config32(dev, ADSP_PCI_VDRTCTL0, &tmp32);
+ if (type == WILDCAT_POINT) {
+ if (priv->adsp_d3_pg_enable) {
+ tmp32 &= ~ADSP_VDRTCTL0_D3PGD_WPT;
+ if (priv->adsp_sram_pg_enable)
+ tmp32 &= ~ADSP_VDRTCTL0_D3SRAMPGD_WPT;
+ else
+ tmp32 |= ADSP_VDRTCTL0_D3SRAMPGD_WPT;
+ } else {
+ tmp32 |= ADSP_VDRTCTL0_D3PGD_WPT;
+ }
+ } else {
+ if (priv->adsp_d3_pg_enable) {
+ tmp32 &= ~ADSP_VDRTCTL0_D3PGD_LPT;
+ if (priv->adsp_sram_pg_enable)
+ tmp32 &= ~ADSP_VDRTCTL0_D3SRAMPGD_LPT;
+ else
+ tmp32 |= ADSP_VDRTCTL0_D3SRAMPGD_LPT;
+ } else {
+ tmp32 |= ADSP_VDRTCTL0_D3PGD_LPT;
+ }
+ }
+ dm_pci_write_config32(dev, ADSP_PCI_VDRTCTL0, tmp32);
+
+ /* Set PSF Snoop to SA, RCBA+0x3350[10]=1b */
+ setbits_le32(RCB_REG(0x3350), 1 << 10);
+
+ /* Set DSP IOBP PMCTL 0x1e0=0x3f */
+ pch_iobp_write(ADSP_IOBP_PMCTL, ADSP_PMCTL_VALUE);
+
+ if (priv->sio_acpi_mode) {
+ /* Configure for ACPI mode */
+ log_info("ADSP: Enable ACPI Mode IRQ3\n");
+
+ /* Set interrupt de-assert/assert opcode override to IRQ3 */
+ pch_iobp_write(ADSP_IOBP_VDLDAT2, ADSP_IOBP_ACPI_IRQ3);
+
+ /* Enable IRQ3 in RCBA */
+ setbits_le32(RCB_REG(ACPIIRQEN), ADSP_ACPI_IRQEN);
+
+ /* Set ACPI Interrupt Enable Bit */
+ pch_iobp_update(ADSP_IOBP_PCICFGCTL, ~ADSP_PCICFGCTL_SPCBAD,
+ ADSP_PCICFGCTL_ACPIIE);
+
+ /* Put ADSP in D3hot */
+ clrbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT);
+ } else {
+ log_info("ADSP: Enable PCI Mode IRQ23\n");
+
+ /* Configure for PCI mode */
+ dm_pci_write_config32(dev, PCI_INTERRUPT_LINE, ADSP_PCI_IRQ);
+
+ /* Clear ACPI Interrupt Enable Bit */
+ pch_iobp_update(ADSP_IOBP_PCICFGCTL,
+ ~(ADSP_PCICFGCTL_SPCBAD |
+ ADSP_PCICFGCTL_ACPIIE), 0);
+ }
+
+ return 0;
+}
+
+static int broadwell_adsp_ofdata_to_platdata(struct udevice *dev)
+{
+ struct broadwell_adsp_priv *priv = dev_get_priv(dev);
+
+ priv->adsp_d3_pg_enable = dev_read_bool(dev, "intel,adsp-d3-pg-enable");
+ priv->adsp_sram_pg_enable = dev_read_bool(dev,
+ "intel,adsp-sram-pg-enable");
+ priv->sio_acpi_mode = dev_read_bool(dev, "intel,sio-acpi-mode");
+
+ return 0;
+}
+
+static const struct udevice_id broadwell_adsp_ids[] = {
+ { .compatible = "intel,wildcatpoint-adsp", .data = WILDCAT_POINT },
+ { }
+};
+
+U_BOOT_DRIVER(broadwell_adsp_drv) = {
+ .name = "adsp",
+ .id = UCLASS_SYSCON,
+ .ofdata_to_platdata = broadwell_adsp_ofdata_to_platdata,
+ .of_match = broadwell_adsp_ids,
+ .bind = dm_scan_fdt_dev,
+ .probe = broadwell_adsp_probe,
+};
+
+static struct pci_device_id broadwell_adsp_supported[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_WILDCATPOINT_ADSP) },
+ { },
+};
+
+U_BOOT_PCI_DEVICE(broadwell_adsp_drv, broadwell_adsp_supported);