New patch to review for coreboot: soc/intel/skylake: Add support for SPI device

[Furquan Shaikh]

Furquan Shaikh ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18341

-gerrit

commit f607213c00ede3c51648d41cf199cf8c0867eb68
Author: Furquan Shaikh 
Date:   Sat Feb 11 11:06:19 2017 -0800

soc/intel/skylake: Add support for SPI device

Add a new PCI driver for SPI devices with supported PCI ids. Also,
    provide a translation table to convert struct device structure into SPI
    bus number.

BUG=chrome-os-partner:59832
    BRANCH=None
    TEST=Compiles successfully

Change-Id: If860eb819f2ce5ae5443f808b356af57f86c52be
    Signed-off-by: Furquan Shaikh 
---
 src/soc/intel/skylake/include/soc/pci_devs.h | 10 ++++++++
 src/soc/intel/skylake/spi.c                  | 37 ++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/src/soc/intel/skylake/include/soc/pci_devs.h b/src/soc/intel/skylake/include/soc/pci_devs.h
index 974f1d8..a19a7c6 100644
--- a/src/soc/intel/skylake/include/soc/pci_devs.h
+++ b/src/soc/intel/skylake/include/soc/pci_devs.h
@@ -176,4 +176,14 @@ static inline int i2c_devfn_to_bus(unsigned devfn)
    return -1;
 }

+static inline int spi_devfn_to_bus(unsigned devfn)
+{
+	switch (devfn) {
+	case PCH_DEVFN_SPI: return 0;
+	case PCH_DEVFN_GSPI0: return 1;
+	case PCH_DEVFN_GSPI1: return 2;
+	}
+	return -1;
+}
+
 #endif
diff --git a/src/soc/intel/skylake/spi.c b/src/soc/intel/skylake/spi.c
index ddff4dc..6571fd5 100644
--- a/src/soc/intel/skylake/spi.c
+++ b/src/soc/intel/skylake/spi.c
@@ -15,6 +15,12 @@
  */

#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_def.h>
+#include <device/pci_ids.h>
+#include <device/spi.h>
+#include <soc/ramstage.h>
 #include <spi-generic.h>

/* SPI controller managing the flash-device SPI. */
@@ -61,3 +67,34 @@ const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = {
 };

const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map);
+
+#if ENV_RAMSTAGE && !defined(__SIMPLE_DEVICE__)
+
+static int spi_dev_to_bus(struct device *dev)
+{
+	return spi_devfn_to_bus(dev->path.pci.devfn);
+}
+
+static struct spi_bus_operations spi_bus_ops = {
+	.dev_to_bus			= &spi_dev_to_bus,
+};
+
+static struct device_operations spi_dev_ops = {
+	.read_resources		= &pci_dev_read_resources,
+	.set_resources			= &pci_dev_set_resources,
+	.enable_resources		= &pci_dev_enable_resources,
+	.scan_bus			= &scan_smbus,
+	.ops_pci			= &soc_pci_ops,
+	.ops_spi_bus			= &spi_bus_ops,
+};
+
+static const unsigned short pci_device_ids[] = {
+	0x9d24, 0x9d29, 0x9d2a, 0
+};
+
+static const struct pci_driver pch_spi __pci_driver = {
+	.ops		= &spi_dev_ops,
+	.vendor	= PCI_VENDOR_ID_INTEL,
+	.devices	= pci_device_ids,
+};
+#endif