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Added debug statements

tags/v0.9.3
Michael Brown 18 years ago
parent
commit
6b45947a59
1 changed files with 20 additions and 4 deletions
  1. 20
    4
      src/drivers/nvs/spi.c

+ 20
- 4
src/drivers/nvs/spi.c View File

@@ -85,8 +85,16 @@ int spi_read ( struct nvs_device *nvs, unsigned int address,
85 85
 	struct spi_bus *bus = device->bus;
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 	unsigned int command = spi_command ( SPI_READ, address,
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 					     device->munge_address );
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+	int rc;
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+
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+	DBG ( "SPI %p reading %d bytes from %#04x\n", device, len, address );
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+	if ( ( rc = bus->rw ( bus, device, command, address,
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+			      NULL, data, len ) ) != 0 ) {
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+		DBG ( "SPI %p failed to read data from device\n", device );
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+		return rc;
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+	}
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-	return bus->rw ( bus, device, command, address, NULL, data, len );
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+	return 0;
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 }
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92 100
 /**
@@ -106,16 +114,24 @@ int spi_write ( struct nvs_device *nvs, unsigned int address,
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 					     device->munge_address );
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 	int rc;
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+	DBG ( "SPI %p writing %d bytes to %#04x\n", device, len, address );
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+
109 119
 	if ( ( rc = bus->rw ( bus, device, SPI_WREN, -1,
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-			      NULL, NULL, 0 ) ) != 0 )
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+			      NULL, NULL, 0 ) ) != 0 ) {
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+		DBG ( "SPI %p failed to write-enable device\n", device );
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 		return rc;
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+	}
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 	if ( ( rc = bus->rw ( bus, device, command, address,
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-			      data, NULL, len ) ) != 0 )
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+			      data, NULL, len ) ) != 0 ) {
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+		DBG ( "SPI %p failed to write data to device\n", device );
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 		return rc;
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+	}
116 130
 	
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-	if ( ( rc = spi_wait ( device ) ) != 0 )
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+	if ( ( rc = spi_wait ( device ) ) != 0 ) {
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+		DBG ( "SPI %p failed to complete write operation\n", device );
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 		return rc;
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+	}
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 	return 0;
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 }

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