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Sansa Connect: Retry AVR commands only 3 times 

If the commands repeatedly fail it is likely that the AVR is not
programmed. In such case simply continue normal operation. This is
especially important in bootloader as it makes it possible to load new
rockbox build using bootloader USB mode. Otherwise, the only recovery
option would be to use I2C serial.

Change-Id: I4b0999833e9a906ec6353bdfdd5b68211f07ac81
This commit is contained in:
Tomasz Moń 2021-06-25 17:57:08 +02:00
parent 3738510953
commit ead4bc0769
No known key found for this signature in database
GPG Key ID: 92BA8820D4D517C8
1 changed files with 33 additions and 16 deletions
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49
firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c
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@ -53,6 +53,7 @@
#endif
#define AVR_DELAY_US 100
#define AVR_MAX_RETRIES 3
#define CMD_SYNC 0xAA
#define CMD_CLOSE 0xCC
@ -428,26 +429,38 @@ static bool avr_run_command(uint8_t opcode, uint8_t *data, size_t data_length)
}
static void avr_hid_sync(void)
static bool avr_hid_sync(void)
{
uint8_t data;
while (!avr_run_command(CMD_VER, &data, sizeof(data)))
int retry;
for (retry = 0; retry < AVR_MAX_RETRIES; retry++)
{
/* TODO: Program HID if failing for long time.
* To do so, unfortunately, AVR firmware would have to be written
* from scratch as OF blob cannot be used due to licensing.
*/
if (avr_run_command(CMD_VER, &data, sizeof(data)))
{
return true;
}
}
/* TODO: Program HID as it appears to be not programmed.
* To do so, unfortunately, AVR firmware would have to be written
* from scratch as OF blob cannot be used due to licensing.
*/
return false;
}
static void avr_execute_command(uint8_t opcode, uint8_t *data, size_t data_length)
static bool avr_execute_command(uint8_t opcode, uint8_t *data, size_t data_length)
{
while (!avr_run_command(opcode, data, data_length))
int retry;
for (retry = 0; retry < AVR_MAX_RETRIES; retry++)
{
if (avr_run_command(opcode, data, data_length))
{
return true;
}
/* Resync and try again */
avr_hid_sync();
}
return false;
}
void avr_hid_init(void)
@ -499,18 +512,22 @@ bool charging_state(void)
static void avr_hid_get_state(void)
{
uint8_t state[8];
avr_execute_command(CMD_STATE, state, sizeof(state));
avr_battery_status = state[6];
avr_battery_level = state[7];
parse_button_state(state);
if (avr_execute_command(CMD_STATE, state, sizeof(state)))
{
avr_battery_status = state[6];
avr_battery_level = state[7];
parse_button_state(state);
}
}
static uint32_t avr_hid_get_monotime(void)
{
uint8_t tmp[4];
avr_execute_command(CMD_MONOTIME, tmp, sizeof(tmp));
return (tmp[0]) | (tmp[1] << 8) | (tmp[2] << 16) | (tmp[3] << 24);
if (avr_execute_command(CMD_MONOTIME, tmp, sizeof(tmp)))
{
return (tmp[0]) | (tmp[1] << 8) | (tmp[2] << 16) | (tmp[3] << 24);
}
return 0;
}
static void avr_hid_enable_wheel(void)