diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/sep/sep_driver.c | 68 |
1 files changed, 45 insertions, 23 deletions
diff --git a/drivers/staging/sep/sep_driver.c b/drivers/staging/sep/sep_driver.c index 23514f9d323..1fdf742046e 100644 --- a/drivers/staging/sep/sep_driver.c +++ b/drivers/staging/sep/sep_driver.c @@ -461,7 +461,8 @@ static unsigned int sep_poll(struct file *filp, poll_table * wait) } /* - calculates time and sets it at the predefined address + calculates time and sets it at the predefined address. Called with the + mutex held. */ static int sep_set_time(struct sep_device *sep, unsigned long *address_ptr, unsigned long *time_in_sec_ptr) { @@ -496,53 +497,74 @@ static int sep_set_time(struct sep_device *sep, unsigned long *address_ptr, unsi return 0; } -/* - This function raises interrupt to SEP that signals that is has a new - command from HOST -*/ +/** + * sep_dump_message - dump the message that is pending + * @sep: sep device + * + * Dump out the message pending in the shared message area + */ + +static void sep_dump_message(struct sep_device *sep) +{ + int count; + for (count = 0; count < 12 * 4; count += 4) + edbg("Word %d of the message is %u\n", count, *((u32 *) (sep->shared_addr + count))); +} + +/** + * sep_send_command_handler - kick off a command + * @sep: sep being signalled + * + * This function raises interrupt to SEP that signals that is has a new + * command from the host + */ + static void sep_send_command_handler(struct sep_device *sep) { - unsigned long count; + dbg("sep:sep_send_command_handler start\n"); - dbg("SEP Driver:--------> sep_send_command_handler start\n"); + mutex_lock(&sep_mutex); sep_set_time(sep, 0, 0); - /* flash cache */ + /* FIXME: flush cache */ flush_cache_all(); - for (count = 0; count < 12 * 4; count += 4) - edbg("Word %lu of the message is %lu\n", count, *((unsigned long *) (sep->shared_addr + count))); - + sep_dump_message(sep); /* update counter */ sep->send_ct++; /* send interrupt to SEP */ sep_write_reg(sep, HW_HOST_HOST_SEP_GPR0_REG_ADDR, 0x2); dbg("SEP Driver:<-------- sep_send_command_handler end\n"); + mutex_unlock(&sep_mutex); return; } -/* - This function raises interrupt to SEPm that signals that is has a - new command from HOST -*/ +/** + * sep_send_reply_command_handler - kick off a command reply + * @sep: sep being signalled + * + * This function raises interrupt to SEP that signals that is has a new + * command from the host + */ + static void sep_send_reply_command_handler(struct sep_device *sep) { - unsigned long count; - - dbg("SEP Driver:--------> sep_send_reply_command_handler start\n"); + dbg("sep:sep_send_reply_command_handler start\n"); /* flash cache */ flush_cache_all(); - for (count = 0; count < 12 * 4; count += 4) - edbg("Word %lu of the message is %lu\n", count, *((unsigned long *) (sep->shared_addr + count))); - /* update counter */ - sep->send_ct++; + + sep_dump_message(sep); + + mutex_lock(&sep_mutex); + sep->send_ct++; /* update counter */ /* send the interrupt to SEP */ sep_write_reg(sep, HW_HOST_HOST_SEP_GPR2_REG_ADDR, sep->send_ct); /* update both counters */ sep->send_ct++; sep->reply_ct++; - dbg("SEP Driver:<-------- sep_send_reply_command_handler end\n"); + mutex_unlock(&sep_mutex); + dbg("sep: sep_send_reply_command_handler end\n"); } /* |