soc/intel/snowridge: Add support for Intel Atom Snow Ridge SoC

This change adds support for Intel Atom Processors P5300, P5700
product families (known as Snow Ridge NS and Snow Ridge NX).

Change-Id: I32ad836dfaaff0d1816eac41e5a7d19ece11080f
Signed-off-by: Yuchi Chen <yuchi.chen@intel.com>
Tested-by: Vasiliy Khoruzhick <vasilykh@arista.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83321
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/soc/intel/snowridge/sata.c b/src/soc/intel/snowridge/sata.c
new file mode 100644
index 0000000000..bdd881d996
--- /dev/null
+++ b/src/soc/intel/snowridge/sata.c
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/mmio.h>
+#include <device/pci.h>
+#include <device/pci_def.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <soc/sata.h>
+
+static void sata_init(struct device *dev)
+{
+	uint32_t reg32, abar;
+
+	printk(BIOS_DEBUG, "Set SATA controller in AHCI mode.\n");
+
+	uint16_t reg16 = pci_read_config16(dev, SATA_MAP);
+	reg16 &= ~(3 << 6);
+	reg16 |= SATA_MAP_AHCI;
+	pci_write_config16(dev, SATA_MAP, reg16);
+
+	/* Initialize AHCI memory-mapped space */
+	abar = pci_read_config32(dev, SATA_ABAR);
+
+	/* Enable AHCI Mode */
+	reg32 = read32p(abar + SATA_GHC);
+	reg32 |= SATA_GHC_AE;
+	write32p(abar + SATA_GHC, reg32);
+}
+
+static struct device_operations snr_sata_ops = {
+	.read_resources = pci_dev_read_resources,
+	.set_resources = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init = sata_init,
+	.final = pci_dev_request_bus_master,
+	.ops_pci = &pci_dev_ops_pci,
+};
+
+static const unsigned short snr_sata_ids[] = {
+	PCI_DID_INTEL_SNR_SATA0,
+	PCI_DID_INTEL_SNR_SATA2,
+	0,
+};
+
+static const struct pci_driver snr_sata_driver __pci_driver = {
+	.ops = &snr_sata_ops,
+	.vendor = PCI_VID_INTEL,
+	.devices = snr_sata_ids,
+};