From: Vadim Bendebury <vbendeb@chromium.org>
Date: Mon, 29 Oct 2012 05:23:45 +0000 (+0000)
Subject: scsi: Provide support for a list of AHCI controllers.
X-Git-Tag: v2013.01-rc1~52
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=commitdiff_plain;h=4ae5eb7c5bb8b393ffeec456329a331a786bba47;ds=sidebyside

scsi: Provide support for a list of AHCI controllers.

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@chromium.org>
Signed-off-by: Taylor Hutt <thutt@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
index 22d0119814..50eb239aaf 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);