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authorMike Nicholson <mike.nicholson@multitech.com>2018-12-12 16:46:36 -0600
committerMike Nicholson <mike.nicholson@multitech.com>2018-12-12 16:46:36 -0600
commit3ac592211f34365e1788ff2ec01cdbc03e48b660 (patch)
treeb6907f9c6f345ffa84b01fb745d6fc410e5a6189 /io-module/mts-io.c
parentf6993959e8123185a96d98b216d6f40da131a92d (diff)
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Load EEPROM via request_firmware
Diffstat (limited to 'io-module/mts-io.c')
-rw-r--r--io-module/mts-io.c50
1 files changed, 29 insertions, 21 deletions
diff --git a/io-module/mts-io.c b/io-module/mts-io.c
index 7726b34..64886a0 100644
--- a/io-module/mts-io.c
+++ b/io-module/mts-io.c
@@ -44,7 +44,7 @@
#include <linux/ctype.h>
#include <linux/io.h>
#include <linux/module.h>
-
+#include <linux/firmware.h>
#include "mts_io_module.h"
#include "mts_io.h"
#include "buttons.h"
@@ -54,9 +54,7 @@
#define LED_LS_CONTROLLABLE 0
/* on-board EEPROM */
-extern uint8_t mts_id_eeprom[512];
static struct mts_id_eeprom_layout id_eeprom;
-
static uint8_t mts_hw_version;
struct platform_device *mts_io_platform_device;
EXPORT_SYMBOL(mts_io_platform_device);
@@ -574,18 +572,27 @@ mts_id_eeprom_load(void)
int current_blength; // Current length in bytes of attribute array
int current_count; // Number of items in array
struct attribute **all_attrs = NULL;
- char *tmp;
- int noradio;
-
- //The mts_id_eeprom buffer is initialize once on boot
- //reloading the mts_io.ko module will not reinitialize this buffer
- //only rebooting will reinitialize this buffer
- memcpy(&id_eeprom, mts_id_eeprom, sizeof(mts_id_eeprom));
-
- if (mts_id_eeprom[0] == 0xFF) {
- log_error("uninitialized eeprom");
- return -EIO;
- }
+ char *tmp;
+ int noradio;
+ int ret;
+ const struct firmware* fw = NULL;
+
+ /* Attempt to load the mts-io driver */
+ if((ret = request_firmware(&fw, "mts_eeprom.bin", &mts_io_platform_device->dev)) == 0) {
+ if(fw->size == sizeof(id_eeprom))
+ {
+ memcpy(&id_eeprom, fw->data, sizeof(id_eeprom));
+ log_info("Platform EEPROM contents loaded");
+ }
+ else
+ {
+ log_error("Invalid platform EEPROM length (%d)", fw->size);
+ }
+
+ release_firmware(fw);
+ } else {
+ log_error("Unable to load EEPROM contents (%d)", ret);
+ }
noradio = ! has_radio(id_eeprom.product_id,sizeof id_eeprom.product_id);
log_debug("mts_id_eeprom: noradio=%d",noradio);
@@ -860,18 +867,19 @@ static int __init mts_io_init(void)
log_info("init: " DRIVER_VERSION);
- ret = mts_id_eeprom_load();
- if (ret) {
- cleanup();
- return ret;
- }
-
mts_io_platform_device = platform_device_alloc(PLATFORM_NAME, -1);
if (!mts_io_platform_device) {
cleanup();
return -ENOMEM;
}
+ /* request_firmware() requires a device, so call after device allocated */
+ ret = mts_id_eeprom_load();
+ if (ret) {
+ cleanup();
+ return ret;
+ }
+
ret = platform_device_add(mts_io_platform_device);
if (ret) {
cleanup();