From eb9401e3ebfa6a1550522be28895af461137f797 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Mon, 11 Nov 2002 02:11:37 +0000
Subject: * Patch by Andreas Oberritter, 09 Nov 2002:   Change behaviour of
 NetLoop(): return -1 for errors, filesize   otherwise; return code 0 is valid
 an means no file loaded - in this   case the environment still gets updated!

* Patches by Jon Diekema, 9 Nov 2002:
  - improve ADC/DAC clocking on the SACSng board to align
    the failing edges of LRCLK and SCLK
  - sbc8260 configuration tweaks
  - add status LED support for 82xx systems
  - wire sspi/sspo commands into command handler; improved error
    handlering
  - add timestamp support and alternate memory test to the
    SACSng configuration
---
 common/cmd_spi.c | 57 ++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 37 insertions(+), 20 deletions(-)

(limited to 'common/cmd_spi.c')

diff --git a/common/cmd_spi.c b/common/cmd_spi.c
index ccf9cc2..d544b27 100644
--- a/common/cmd_spi.c
+++ b/common/cmd_spi.c
@@ -32,14 +32,20 @@
 
 #if (CONFIG_COMMANDS & CFG_CMD_SPI)
 
-#define MAX_SPI_BYTES	32	/* max number of bytes we can handle */
+/*-----------------------------------------------------------------------
+ * Definitions
+ */
+
+#ifndef MAX_SPI_BYTES
+#   define MAX_SPI_BYTES 32	/* Maximum number of bytes we can handle */
+#endif
 
 /*
  * External table of chip select functions (see the appropriate board
  * support for the actual definition of the table).
  */
 extern spi_chipsel_type spi_chipsel[];
-
+extern int spi_chipsel_cnt;
 
 /*
  * Values from last command.
@@ -60,7 +66,7 @@ static uchar din[MAX_SPI_BYTES];
  * The command prints out the hexadecimal string received via SPI.
  */
 
-int do_spi (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
+int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	char  *cp = 0;
 	uchar tmp;
@@ -78,26 +84,38 @@ int do_spi (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
 			device = simple_strtoul(argv[1], NULL, 10);
 		if (argc >= 3)
 			bitlen = simple_strtoul(argv[2], NULL, 10);
-		if (argc >= 4)
-		cp = argv[3];
-		for(j = 0; *cp; j++, cp++) {
-			tmp = *cp - '0';
-			if(tmp > 9)
-				tmp -= ('A' - '0') - 10;
-			if(tmp > 15)
-				tmp -= ('a' - 'A');
-			if(tmp > 15) {
-				printf("Conversion error on %c, bailing out.\n", *cp);
-				break;
+		if (argc >= 4) {
+			cp = argv[3];
+			for(j = 0; *cp; j++, cp++) {
+				tmp = *cp - '0';
+				if(tmp > 9)
+					tmp -= ('A' - '0') - 10;
+				if(tmp > 15)
+					tmp -= ('a' - 'A');
+				if(tmp > 15) {
+					printf("Hex conversion error on %c, giving up.\n", *cp);
+					return 1;
+				}
+				if((j % 2) == 0)
+					dout[j / 2] = (tmp << 4);
+				else
+					dout[j / 2] |= tmp;
 			}
-			if((j % 2) == 0)
-				dout[j / 2] = (tmp << 4);
-			else
-				dout[j / 2] |= tmp;
 		}
 	}
 
-printf("spi_chipsel[%d] = %08X\n", device, (uint)spi_chipsel[device]);
+	if ((device < 0) || (device >=  spi_chipsel_cnt)) {
+		printf("Invalid device %d, giving up.\n", device);
+		return 1;
+	} 
+	if ((bitlen < 0) || (bitlen >  (MAX_SPI_BYTES * 8))) {
+		printf("Invalid bitlen %d, giving up.\n", bitlen);
+		return 1;
+	} 
+
+	debug ("spi_chipsel[%d] = %08X\n",
+		device, (uint)spi_chipsel[device]);
+
 	if(spi_xfer(spi_chipsel[device], bitlen, dout, din) != 0) {
 		printf("Error with the SPI transaction.\n");
 		rcode = 1;
@@ -113,4 +131,3 @@ printf("spi_chipsel[%d] = %08X\n", device, (uint)spi_chipsel[device]);
 }
 
 #endif	/* CFG_CMD_SPI */
-
-- 
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