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ACPI: EC: use printk_ratelimit(), add some DEBUG mode messages
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Sometimes it is usefull to see raw protocol dump.
Uncomment '#define DEBUG' at the beginning of file to make EC
really verbose.

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
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Márton Németh authored and Len Brown committed Nov 21, 2007
1 parent 0af2f65 commit 3ebe08a
Showing 1 changed file with 31 additions and 19 deletions.
50 changes: 31 additions & 19 deletions drivers/acpi/ec.c
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,9 @@
#undef PREFIX
#define PREFIX "ACPI: EC: "

/* Uncomment next line to get verbose print outs*/
/* #define DEBUG */

/* EC status register */
#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */
#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */
Expand Down Expand Up @@ -131,21 +134,27 @@ static struct acpi_ec {

static inline u8 acpi_ec_read_status(struct acpi_ec *ec)
{
return inb(ec->command_addr);
u8 x = inb(ec->command_addr);
pr_debug(PREFIX "---> status = 0x%2x\n", x);
return x;
}

static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
{
u8 x = inb(ec->data_addr);
pr_debug(PREFIX "---> data = 0x%2x\n", x);
return inb(ec->data_addr);
}

static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
{
pr_debug(PREFIX "<--- command = 0x%2x\n", command);
outb(command, ec->command_addr);
}

static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
{
pr_debug(PREFIX "<--- data = 0x%2x\n", data);
outb(data, ec->data_addr);
}

Expand Down Expand Up @@ -175,13 +184,14 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
if (acpi_ec_check_status(ec, event)) {
if (event == ACPI_EC_EVENT_OBF_1) {
/* miss OBF = 1 GPE, don't expect it anymore */
printk(KERN_INFO PREFIX "missing OBF_1 confirmation,"
pr_info(PREFIX "missing OBF_1 confirmation,"
"switching to degraded mode.\n");
set_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags);
} else {
/* missing GPEs, switch back to poll mode */
printk(KERN_INFO PREFIX "missing IBF_1 confirmations,"
"switch off interrupt mode.\n");
if (printk_ratelimit())
pr_info(PREFIX "missing IBF_1 confirmations,"
"switch off interrupt mode.\n");
clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
}
return 0;
Expand All @@ -194,7 +204,7 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
return 0;
}
}
printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
pr_err(PREFIX "acpi_ec_wait timeout,"
" status = %d, expect_event = %d\n",
acpi_ec_read_status(ec), event);
return -ETIME;
Expand All @@ -208,11 +218,11 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
int result = 0;
set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
acpi_ec_write_cmd(ec, command);

pr_debug(PREFIX "transaction start\n");
for (; wdata_len > 0; --wdata_len) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll);
if (result) {
printk(KERN_ERR PREFIX
pr_err(PREFIX
"write_cmd timeout, command = %d\n", command);
goto end;
}
Expand All @@ -223,7 +233,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
if (!rdata_len) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll);
if (result) {
printk(KERN_ERR PREFIX
pr_err(PREFIX
"finish-write timeout, command = %d\n", command);
goto end;
}
Expand All @@ -235,8 +245,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
force_poll = 1;
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll);
if (result) {
printk(KERN_ERR PREFIX "read timeout, command = %d\n",
command);
pr_err(PREFIX "read timeout, command = %d\n", command);
goto end;
}
/* Don't expect GPE after last read */
Expand All @@ -245,6 +254,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
*(rdata++) = acpi_ec_read_data(ec);
}
end:
pr_debug(PREFIX "transaction end\n");
return result;
}

Expand Down Expand Up @@ -273,8 +283,8 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,

status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0);
if (status) {
printk(KERN_ERR PREFIX
"input buffer is not empty, aborting transaction\n");
pr_err(PREFIX "input buffer is not empty, "
"aborting transaction\n");
goto end;
}

Expand Down Expand Up @@ -488,6 +498,7 @@ static u32 acpi_ec_gpe_handler(void *data)
acpi_status status = AE_OK;
struct acpi_ec *ec = data;

pr_debug(PREFIX "~~~> interrupt\n");
clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))
wake_up(&ec->wait);
Expand All @@ -498,8 +509,9 @@ static u32 acpi_ec_gpe_handler(void *data)
acpi_ec_gpe_query, ec);
} else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) {
/* this is non-query, must be confirmation */
printk(KERN_INFO PREFIX "non-query interrupt received,"
" switching to interrupt mode\n");
if (printk_ratelimit())
pr_info(PREFIX "non-query interrupt received,"
" switching to interrupt mode\n");
set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
}

Expand Down Expand Up @@ -701,10 +713,10 @@ static void ec_remove_handlers(struct acpi_ec *ec)
{
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
printk(KERN_ERR PREFIX "failed to remove space handler\n");
pr_err(PREFIX "failed to remove space handler\n");
if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe,
&acpi_ec_gpe_handler)))
printk(KERN_ERR PREFIX "failed to remove gpe handler\n");
pr_err(PREFIX "failed to remove gpe handler\n");
ec->handlers_installed = 0;
}

Expand Down Expand Up @@ -747,9 +759,9 @@ static int acpi_ec_add(struct acpi_device *device)
first_ec = ec;
acpi_driver_data(device) = ec;
acpi_ec_add_fs(device);
printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
ec->gpe, ec->command_addr, ec->data_addr);
printk(KERN_INFO PREFIX "driver started in %s mode\n",
pr_info(PREFIX "driver started in %s mode\n",
(test_bit(EC_FLAGS_GPE_MODE, &ec->flags))?"interrupt":"poll");
return 0;
}
Expand Down Expand Up @@ -875,7 +887,7 @@ int __init acpi_ec_ecdt_probe(void)
status = acpi_get_table(ACPI_SIG_ECDT, 1,
(struct acpi_table_header **)&ecdt_ptr);
if (ACPI_SUCCESS(status)) {
printk(KERN_INFO PREFIX "EC description table is found, configuring boot EC\n");
pr_info(PREFIX "EC description table is found, configuring boot EC\n");
boot_ec->command_addr = ecdt_ptr->control.address;
boot_ec->data_addr = ecdt_ptr->data.address;
boot_ec->gpe = ecdt_ptr->gpe;
Expand Down

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