Change in flashrom[master]: pcidev: scandev_inclass WIP

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/59277 )

Change subject: pcidev: scandev_inclass WIP
......................................................................

pcidev: scandev_inclass WIP

more than one ISA bridge??

Change-Id: I1978e178fb73485f1c5c7e732853522847267cee
Signed-off-by: Edward O'Callaghan 
---
M board_enable.c
M pcidev.c
M programmer.h
3 files changed, 25 insertions(+), 16 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/77/59277/1

diff --git a/board_enable.c b/board_enable.c
index ae8ce2c..f3e8718 100644
--- a/board_enable.c
+++ b/board_enable.c
@@ -1551,26 +1551,20 @@
    int i, allowed;

/* First, look for a known LPC bridge */
-	for (dev = pacc->devices; dev; dev = dev->next) {
-		uint16_t device_class;
-		/* libpci before version 2.2.4 does not store class info. */
-		device_class = pci_read_word(dev, PCI_CLASS_DEVICE);
-		if ((dev->vendor_id == 0x8086) &&
-		    (device_class == 0x0601)) { /* ISA bridge */
-			/* Is this device in our list? */
-			for (i = 0; intel_ich_gpio_table[i].id; i++)
-				if (dev->device_id == intel_ich_gpio_table[i].id)
-					break;
-
-			if (intel_ich_gpio_table[i].id)
-				break;
-		}
-	}
-
+	dev = pcidev_scandev_inclass(0x0601, 0x8086); /* ISA bridge */
    if (!dev) {
    	msg_perr("\nERROR: No known Intel LPC bridge found.\n");
    	return -1;
    }
+	/* Is this device in our list? */
+	for (i = 0; intel_ich_gpio_table[i].id; i++)
+		if (dev->device_id == intel_ich_gpio_table[i].id)
+			break;
+
+	if (!intel_ich_gpio_table[i].id) {
+		msg_perr("\nERROR: No known Intel LPC bridge found.\n");
+		return -1;
+	}

/*
     * According to the datasheets, all Intel ICHs have the GPIO bar 5:1
diff --git a/pcidev.c b/pcidev.c
index c9c86b8..e57b90c 100644
--- a/pcidev.c
+++ b/pcidev.c
@@ -157,6 +157,20 @@
    return NULL;
 }

+struct pci_dev *pcidev_scandev_inclass(uint16_t class, uint16_t vid)
+{
+	struct pci_dev *dev;
+	/* First, look for a known LPC bridge */
+	for (dev = pacc->devices; dev; dev = dev->next) {
+		uint16_t device_class;
+		/* libpci before version 2.2.4 does not store class info. */
+		device_class = pci_read_word(dev, PCI_CLASS_DEVICE);
+		if ((dev->vendor_id == vid) && (device_class == class))
+			return dev;
+	}
+	return NULL;
+}
+
 struct pci_dev *pcidev_getdev(struct pci_dev *dev)
 {
 #if !defined(OLD_PCI_GET_DEV)
diff --git a/programmer.h b/programmer.h
index a78ee2a..41dc240 100644
--- a/programmer.h
+++ b/programmer.h
@@ -125,6 +125,7 @@
 uintptr_t pcidev_readbar(struct pci_dev *dev, int bar);
 struct pci_dev *pcidev_init(const struct dev_entry *devs, int bar);
 struct pci_dev *pcidev_scandev(struct pci_filter *filter);
+struct pci_dev *pcidev_scandev_inclass(uint16_t class, uint16_t vid);
 struct pci_dev *pcidev_getdev(struct pci_dev *dev);
 /* rpci_write_* are reversible writes. The original PCI config space register
  * contents will be restored on shutdown.