[U-Boot] [PATCH v3 02/22] scsi: Provide support for a list of AHCI controllers.

[Simon Glass]

From: Vadim Bendebury <vbendeb at chromium.org>

Many AHCI controllers are identical, the main (and often the
only) difference being the PCI Vendor ID/Device ID combination
reported by the device.

This change allows the config file to define a list of PCI vendor
ID/device ID pairs. The driver would scan the list and initialize
the first device it finds.

No actual multiple device list is introduced yet, this change
just add the framework.

Signed-off-by: Vadim Bendebury <vbendeb at chromium.org>
Signed-off-by: Taylor Hutt <thutt at chromium.org>
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v3:
- Remove use of DEFINE_PCI_DEVICE_TABLE suggested by siren checkpatch
- Use struct pci_device_id properly

Changes in v2:
- Use struct pci_device_id instead of defining new struct scsi_device
- Squash in CONFIG_PCI patch

 common/cmd_scsi.c |   40 +++++++++++++++++++++++++++++++++++-----
 1 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
index 22d0119..50eb239 100644
--- a/common/cmd_scsi.c
+++ b/common/cmd_scsi.c
@@ -34,6 +34,9 @@
 #include <image.h>
 #include <pci.h>
 
+#ifdef CONFIG_SCSI_DEV_LIST
+#define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
+#else
 #ifdef CONFIG_SCSI_SYM53C8XX
 #define SCSI_VEND_ID	0x1000
 #ifndef CONFIG_SCSI_DEV_ID
@@ -49,8 +52,12 @@
 #elif !defined(CONFIG_SCSI_AHCI_PLAT)
 #error no scsi device defined
 #endif
+#define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
+#endif
 
-
+#ifdef CONFIG_PCI
+const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
+#endif
 static ccb tempccb;	/* temporary scsi command buffer */
 
 static unsigned char tempbuff[512]; /* temporary data buffer */
@@ -178,15 +185,38 @@ removable:
 void scsi_init(void)
 {
 	int busdevfunc;
+	int i;
+	/*
+	 * Find a device from the list, this driver will support a single
+	 * controller.
+	 */
+	for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
+		/* get PCI Device ID */
+		busdevfunc = pci_find_device(scsi_device_list[i].vendor,
+					     scsi_device_list[i].device,
+					     0);
+		if (busdevfunc != -1)
+			break;
+	}
 
-	busdevfunc=pci_find_device(SCSI_VEND_ID,SCSI_DEV_ID,0); /* get PCI Device ID */
-	if(busdevfunc==-1) {
-		printf("Error SCSI Controller (%04X,%04X) not found\n",SCSI_VEND_ID,SCSI_DEV_ID);
+	if (busdevfunc == -1) {
+		printf("Error: SCSI Controller(s) ");
+		for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
+			printf("%04X:%04X ",
+			       scsi_device_list[i].vendor,
+			       scsi_device_list[i].device);
+		}
+		printf("not found\n");
 		return;
 	}
 #ifdef DEBUG
 	else {
-		printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",SCSI_VEND_ID,SCSI_DEV_ID,(busdevfunc>>16)&0xFF,(busdevfunc>>11)&0x1F,(busdevfunc>>8)&0x7);
+		printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
+		       scsi_device_list[i].vendor,
+		       scsi_device_list[i].device,
+		       (busdevfunc >> 16) & 0xFF,
+		       (busdevfunc >> 11) & 0x1F,
+		       (busdevfunc >> 8) & 0x7);
 	}
 #endif
 	scsi_low_level_init(busdevfunc);
-- 
1.7.7.3