From: "Peter E. Berger" <pberger@xxxxxxxxxxx>
The io_ti driver fails to download firmware to Edgeport devices such
as the EP/416, even when the on-disk firmware image
(/lib/firmware/edgeport/down3.bin) is more current than the version
on the EP/416. The current download code is broken in a few ways.
Notably it mis-uses global variables OperationalMajorVersion and
OperationalMinorVersion (reading their values before they've been properly
initialized and subsequently initializing them multiple times without
synchronization) and using an insufficient timeout in ti_vsend_sync()
when doing UMPC_COPY_DNLD_TO_I2C operations. With this patch, firmware
downloads work as expected: if the on disk firmware version is newer
than that on the device, it will be downloaded.
Signed-off-by: Peter E. Berger <pberger@xxxxxxxxxxx>
---
drivers/usb/serial/io_ti.c | 72 ++++++++++++++++++++++++++++++++++------------
1 file changed, 53 insertions(+), 19 deletions(-)
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index c882716..23ed61f 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -188,10 +188,6 @@ static const struct usb_device_id id_table_combined[] = {
MODULE_DEVICE_TABLE(usb, id_table_combined);
-static unsigned char OperationalMajorVersion;
-static unsigned char OperationalMinorVersion;
-static unsigned short OperationalBuildNumber;
-
static int closing_wait = EDGE_CLOSING_WAIT;
static bool ignore_cpu_rev;
static int default_uart_mode; /* RS232 */
@@ -213,6 +209,25 @@ static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
/* Newer Edgeport firmware disconnects ports after periods of inactivity */
#define EP_HEARTBEAT_SECS 15
+int wrap_request_firmware(const struct firmware **fw, struct device *dev,
+ __u8 *MajorVersion, __u8 *MinorVersion, __u16 *BuildNumber)
+{
+ const char *fw_name = "edgeport/down3.bin";
+ int err;
+
+ err = request_firmware(fw, fw_name, dev);
+ if (err) {
+ dev_dbg(dev, "%s - Failed to load image \"%s\" err %d\n",
+ __func__, fw_name, err);
+ } else {
+ /* Save Download Version Number */
+ *MajorVersion = (*fw)->data[0];
+ *MinorVersion = (*fw)->data[1];
+ *BuildNumber = le16_to_cpup((__le16 *)&(*fw)->data[2]);
+ }
+ return err;
+}
+
static int ti_vread_sync(struct usb_device *dev, __u8 request,
__u16 value, __u16 index, u8 *data, int size)
{
@@ -235,10 +250,13 @@ static int ti_vsend_sync(struct usb_device *dev, __u8 request,
__u16 value, __u16 index, u8 *data, int size)
{
int status;
+ int timeout = 1000; /* Timeout in msecs */
+ if (request == UMPC_COPY_DNLD_TO_I2C) /* Downloads take longer */
+ timeout = 10000;
status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
- value, index, data, size, 1000);
+ value, index, data, size, timeout);
if (status < 0)
return status;
if (status != size) {
@@ -762,7 +780,9 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
struct ti_i2c_image_header *img_header;
struct ti_i2c_firmware_rec *firmware_rec;
const struct firmware *fw;
- const char *fw_name = "edgeport/down3.bin";
+ __u8 OperationalMajorVersion = 0;
+ __u8 OperationalMinorVersion = 0;
+ __u16 OperationalBuildNumber = 0;
/* In order to update the I2C firmware we must change the type 2 record
* to type 0xF2. This will force the UMP to come up in Boot Mode.
@@ -785,19 +805,14 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
// Set entire image of 0xffs
memset(buffer, 0xff, buffer_size);
- err = request_firmware(&fw, fw_name, dev);
+ err = wrap_request_firmware(&fw, dev, &OperationalMajorVersion,
+ &OperationalMinorVersion, &OperationalBuildNumber);
+
if (err) {
- dev_err(dev, "Failed to load image \"%s\" err %d\n",
- fw_name, err);
kfree(buffer);
return err;
}
- /* Save Download Version Number */
- OperationalMajorVersion = fw->data[0];
- OperationalMinorVersion = fw->data[1];
- OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
-
/* Copy version number into firmware record */
firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
@@ -943,6 +958,10 @@ static int download_fw(struct edgeport_serial *serial)
struct usb_interface_descriptor *interface;
int download_cur_ver;
int download_new_ver;
+ const struct firmware *fw = NULL;
+ __u8 OperationalMajorVersion = 0;
+ __u8 OperationalMinorVersion = 0;
+ __u16 OperationalBuildNumber = 0;
/* This routine is entered by both the BOOT mode and the Download mode
* We can determine which code is running by the reading the config
@@ -1046,6 +1065,19 @@ static int download_fw(struct edgeport_serial *serial)
return status;
}
+ /* Get version numbers for on-disk fw */
+ if (wrap_request_firmware(&fw, dev,
+ &OperationalMajorVersion,
+ &OperationalMinorVersion,
+ &OperationalBuildNumber)) {
+ dev_dbg(dev, "%s - FW version query failed. Setting version to 0.",
+ __func__);
+ OperationalMajorVersion = 0;
+ OperationalMinorVersion = 0;
+ OperationalBuildNumber = 0;
+ }
+ release_firmware(fw);
+
/* Check version number of download with current
version in I2c */
download_cur_ver = (firmware_version->Ver_Major << 8) +
@@ -1283,7 +1315,6 @@ static int download_fw(struct edgeport_serial *serial)
int buffer_size;
int err;
const struct firmware *fw;
- const char *fw_name = "edgeport/down3.bin";
/* Validate Hardware version number
* Read Manufacturing Descriptor from TI Based Edgeport
@@ -1332,10 +1363,11 @@ static int download_fw(struct edgeport_serial *serial)
/* Initialize the buffer to 0xff (pad the buffer) */
memset(buffer, 0xff, buffer_size);
- err = request_firmware(&fw, fw_name, dev);
+ err = wrap_request_firmware(&fw, dev, &OperationalMajorVersion,
+ &OperationalMinorVersion,
+ &OperationalBuildNumber);
+
if (err) {
- dev_err(dev, "Failed to load image \"%s\" err %d\n",
- fw_name, err);
kfree(buffer);
return err;
}
@@ -1355,7 +1387,9 @@ static int download_fw(struct edgeport_serial *serial)
header->CheckSum = cs;
/* Download the operational code */
- dev_dbg(dev, "%s - Downloading operational code image (TI UMP)\n", __func__);
+ dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
+ __func__, OperationalMajorVersion,
+ OperationalMinorVersion);
status = download_code(serial, buffer, buffer_size);
kfree(buffer);
--
1.8.3.1
--
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