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ACPI: SBS: Split host controller (ACPI0001) from SBS driver (ACPI0002)

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Replace poll-based host controller driver with the notify-based one.
Split it out of sbs.c.
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2007-09-26 19:43:28 +04:00 committed by Len Brown
parent 30c08574da
commit 91087dfa51
4 changed files with 412 additions and 299 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/acpi/Makefile
View file

@ -60,3 +60,4 @@ obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
obj-$(CONFIG_ACPI_HOTPLUG_MEMORY) += acpi_memhotplug.o
obj-y += cm_sbs.o
obj-$(CONFIG_ACPI_SBS) += sbs.o
obj-$(CONFIG_ACPI_SBS) += sbshc.o

374
drivers/acpi/sbs.c
View file

@ -34,6 +34,8 @@
#include <linux/jiffies.h>
#include <linux/delay.h>
#include "sbshc.h"
#define ACPI_SBS_COMPONENT 0x00080000
#define ACPI_SBS_CLASS "sbs"
#define ACPI_AC_CLASS "ac_adapter"
@ -59,28 +61,6 @@ MODULE_AUTHOR("Rich Townsend");
MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");
MODULE_LICENSE("GPL");
#define xmsleep(t) msleep(t)
#define ACPI_EC_SMB_PRTCL 0x00 /* protocol, PEC */
#define ACPI_EC_SMB_STS 0x01 /* status */
#define ACPI_EC_SMB_ADDR 0x02 /* address */
#define ACPI_EC_SMB_CMD 0x03 /* command */
#define ACPI_EC_SMB_DATA 0x04 /* 32 data registers */
#define ACPI_EC_SMB_BCNT 0x24 /* number of data bytes */
#define ACPI_EC_SMB_STS_DONE 0x80
#define ACPI_EC_SMB_STS_STATUS 0x1f
#define ACPI_EC_SMB_PRTCL_WRITE 0x00
#define ACPI_EC_SMB_PRTCL_READ 0x01
#define ACPI_EC_SMB_PRTCL_WORD_DATA 0x08
#define ACPI_EC_SMB_PRTCL_BLOCK_DATA 0x0a
#define ACPI_EC_SMB_TRANSACTION_SLEEP 1
#define ACPI_EC_SMB_ACCESS_SLEEP1 1
#define ACPI_EC_SMB_ACCESS_SLEEP2 10
#define DEF_CAPACITY_UNIT 3
#define MAH_CAPACITY_UNIT 1
#define MWH_CAPACITY_UNIT 2
@ -103,12 +83,6 @@ extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
#define MAX_SBS_BAT 4
#define ACPI_SBS_BLOCK_MAX 32
#define ACPI_SBS_SMBUS_READ 1
#define ACPI_SBS_SMBUS_WRITE 2
#define ACPI_SBS_WORD_DATA 1
#define ACPI_SBS_BLOCK_DATA 2
#define UPDATE_DELAY 10
/* 0 - every time, > 0 - by update_time */
@ -124,8 +98,7 @@ static int acpi_sbs_remove(struct acpi_device *device, int type);
static int acpi_sbs_resume(struct acpi_device *device);
static const struct acpi_device_id sbs_device_ids[] = {
{"ACPI0001", 0},
{"ACPI0005", 0},
{"ACPI0002", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
@ -182,8 +155,8 @@ struct acpi_battery {
};
struct acpi_sbs {
int base;
struct acpi_device *device;
struct acpi_smb_hc *hc;
struct mutex mutex;
int sbsm_present;
int sbsm_batteries_supported;
@ -199,190 +172,6 @@ struct acpi_sbs {
static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type);
static void acpi_sbs_update_time(void *data);
union sbs_rw_data {
u16 word;
u8 block[ACPI_SBS_BLOCK_MAX + 2];
};
static int acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
char read_write, u8 command, int size,
union sbs_rw_data *data);
/* --------------------------------------------------------------------------
SMBus Communication
-------------------------------------------------------------------------- */
static int acpi_ec_sbs_read(struct acpi_sbs *sbs, u8 address, u8 * data)
{
u8 val;
int err;
err = ec_read(sbs->base + address, &val);
if (!err) {
*data = val;
}
xmsleep(ACPI_EC_SMB_TRANSACTION_SLEEP);
return (err);
}
static int acpi_ec_sbs_write(struct acpi_sbs *sbs, u8 address, u8 data)
{
int err;
err = ec_write(sbs->base + address, data);
return (err);
}
static int
acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr,
char read_write, u8 command, int size,
union sbs_rw_data *data)
{
unsigned char protocol, len = 0, temp[2] = { 0, 0 };
int i;
if (read_write == ACPI_SBS_SMBUS_READ) {
protocol = ACPI_EC_SMB_PRTCL_READ;
} else {
protocol = ACPI_EC_SMB_PRTCL_WRITE;
}
switch (size) {
case ACPI_SBS_WORD_DATA:
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
if (read_write == ACPI_SBS_SMBUS_WRITE) {
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA, data->word);
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + 1,
data->word >> 8);
}
protocol |= ACPI_EC_SMB_PRTCL_WORD_DATA;
break;
case ACPI_SBS_BLOCK_DATA:
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command);
if (read_write == ACPI_SBS_SMBUS_WRITE) {
len = min_t(u8, data->block[0], 32);
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_BCNT, len);
for (i = 0; i < len; i++)
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + i,
data->block[i + 1]);
}
protocol |= ACPI_EC_SMB_PRTCL_BLOCK_DATA;
break;
default:
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"unsupported transaction %d", size));
return (-1);
}
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_ADDR, addr << 1);
acpi_ec_sbs_write(sbs, ACPI_EC_SMB_PRTCL, protocol);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
xmsleep(ACPI_EC_SMB_ACCESS_SLEEP1);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
}
if (~temp[0] & ACPI_EC_SMB_STS_DONE) {
xmsleep(ACPI_EC_SMB_ACCESS_SLEEP2);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp);
}
if ((~temp[0] & ACPI_EC_SMB_STS_DONE)
|| (temp[0] & ACPI_EC_SMB_STS_STATUS)) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"transaction %d error", size));
return (-1);
}
if (read_write == ACPI_SBS_SMBUS_WRITE) {
return (0);
}
switch (size) {
case ACPI_SBS_WORD_DATA:
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA, temp);
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + 1, temp + 1);
data->word = (temp[1] << 8) | temp[0];
break;
case ACPI_SBS_BLOCK_DATA:
len = 0;
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_BCNT, &len);
len = min_t(u8, len, 32);
for (i = 0; i < len; i++)
acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + i,
data->block + i + 1);
data->block[0] = len;
break;
default:
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"unsupported transaction %d", size));
return (-1);
}
return (0);
}
static int
acpi_sbs_read_word(struct acpi_sbs *sbs, int addr, int func, u16 * word)
{
union sbs_rw_data data;
int result = 0;
result = acpi_ec_sbs_access(sbs, addr,
ACPI_SBS_SMBUS_READ, func,
ACPI_SBS_WORD_DATA, &data);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ec_sbs_access() failed"));
} else {
*word = data.word;
}
return result;
}
static int
acpi_sbs_read_str(struct acpi_sbs *sbs, int addr, int func, char *str)
{
union sbs_rw_data data;
int result = 0;
result = acpi_ec_sbs_access(sbs, addr,
ACPI_SBS_SMBUS_READ, func,
ACPI_SBS_BLOCK_DATA, &data);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ec_sbs_access() failed"));
} else {
strncpy(str, (const char *)data.block + 1, data.block[0]);
str[data.block[0]] = 0;
}
return result;
}
static int
acpi_sbs_write_word(struct acpi_sbs *sbs, int addr, int func, int word)
{
union sbs_rw_data data;
int result = 0;
data.word = word;
result = acpi_ec_sbs_access(sbs, addr,
ACPI_SBS_SMBUS_WRITE, func,
ACPI_SBS_WORD_DATA, &data);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_ec_sbs_access() failed"));
}
return result;
}
static int sbs_zombie(struct acpi_sbs *sbs)
{
return (sbs->zombie);
@ -433,11 +222,11 @@ static int acpi_battery_get_present(struct acpi_battery *battery)
int result = 0;
int is_present = 0;
result = acpi_sbs_read_word(battery->sbs,
ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
ACPI_SBSM_SMBUS_ADDR, 0x01, (u8 *)&state);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
}
if (!result) {
is_present = (state & 0x000f) & (1 << battery->id);
@ -461,19 +250,19 @@ static int acpi_battery_select(struct acpi_battery *battery)
* it causes charging to halt on SBSELs */
result =
acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state);
acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SBSM_SMBUS_ADDR, 0x01, (u8 *)&state);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
foo = (state & 0x0fff) | (1 << (battery->id + 12));
result =
acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo);
acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, ACPI_SBSM_SMBUS_ADDR, 0x01, (u8 *)&foo, 2);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
"acpi_smbus_write() failed"));
goto end;
}
}
@ -487,11 +276,11 @@ static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
int result = 0;
s16 battery_system_info;
result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04,
&battery_system_info);
result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBSM_SMBUS_ADDR, 0x04,
(u8 *)&battery_system_info);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
sbs->sbsm_present = 1;
@ -504,50 +293,49 @@ static int acpi_sbsm_get_info(struct acpi_sbs *sbs)
static int acpi_battery_get_info(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 battery_mode;
s16 specification_info;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
&battery_mode);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03,
(u8 *)&battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
battery->info.capacity_mode = (battery_mode & 0x8000) >> 15;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10,
&battery->info.full_charge_capacity);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x10,
(u8 *)&battery->info.full_charge_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18,
&battery->info.design_capacity);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x18,
(u8 *)&battery->info.design_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19,
&battery->info.design_voltage);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x19,
(u8 *)&battery->info.design_voltage);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a,
&specification_info);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x1a,
(u8 *)&specification_info);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
@ -579,32 +367,32 @@ static int acpi_battery_get_info(struct acpi_battery *battery)
battery->info.ipscale = 1;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c,
&battery->info.serial_number);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x1c,
(u8 *)&battery->info.serial_number);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20,
battery->info.manufacturer_name);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_BLOCK, ACPI_SB_SMBUS_ADDR, 0x20,
(u8 *)battery->info.manufacturer_name);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_str() failed"));
goto end;
}
result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21,
battery->info.device_name);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_BLOCK, ACPI_SB_SMBUS_ADDR, 0x21,
(u8 *)battery->info.device_name);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_str() failed"));
goto end;
}
result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22,
battery->info.device_chemistry);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_BLOCK, ACPI_SB_SMBUS_ADDR, 0x22,
(u8 *)battery->info.device_chemistry);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_str() failed"));
@ -617,38 +405,37 @@ static int acpi_battery_get_info(struct acpi_battery *battery)
static int acpi_battery_get_state(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09,
&battery->state.voltage);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x09,
(u8 *)&battery->state.voltage);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a,
&battery->state.amperage);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x0a,
(u8 *)&battery->state.amperage);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f,
&battery->state.remaining_capacity);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x0f,
(u8 *)&battery->state.remaining_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16,
&battery->state.battery_state);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x16,
(u8 *)&battery->state.battery_state);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
@ -658,14 +445,13 @@ static int acpi_battery_get_state(struct acpi_battery *battery)
static int acpi_battery_get_alarm(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
&battery->alarm.remaining_capacity);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x01,
(u8 *)&battery->alarm.remaining_capacity);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
@ -677,7 +463,6 @@ static int acpi_battery_get_alarm(struct acpi_battery *battery)
static int acpi_battery_set_alarm(struct acpi_battery *battery,
unsigned long alarm)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 battery_mode;
int foo;
@ -693,29 +478,30 @@ static int acpi_battery_set_alarm(struct acpi_battery *battery,
if (alarm > 0) {
result =
acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03,
&battery_mode);
acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03,
(u8 *)&battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
battery_mode &= 0xbfff;
result =
acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01,
battery_mode & 0xbfff);
acpi_smbus_write(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x01,
(u8 *)&battery_mode, 2);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
"acpi_smbus_write() failed"));
goto end;
}
}
foo = alarm / (battery->info.capacity_mode ? 10 : 1);
result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo);
result = acpi_smbus_write(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x01, (u8 *)&foo, 2);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
"acpi_smbus_write() failed"));
goto end;
}
@ -726,7 +512,6 @@ static int acpi_battery_set_alarm(struct acpi_battery *battery,
static int acpi_battery_set_mode(struct acpi_battery *battery)
{
struct acpi_sbs *sbs = battery->sbs;
int result = 0;
s16 battery_mode;
@ -734,11 +519,11 @@ static int acpi_battery_set_mode(struct acpi_battery *battery)
goto end;
}
result = acpi_sbs_read_word(sbs,
ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
@ -747,19 +532,19 @@ static int acpi_battery_set_mode(struct acpi_battery *battery)
} else {
battery_mode |= 0x8000;
}
result = acpi_sbs_write_word(sbs,
ACPI_SB_SMBUS_ADDR, 0x03, battery_mode);
result = acpi_smbus_write(battery->sbs->hc, SMBUS_READ_WORD,
ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode, 2);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_write_word() failed"));
"acpi_smbus_write() failed"));
goto end;
}
result = acpi_sbs_read_word(sbs,
ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode);
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
@ -815,12 +600,12 @@ static int acpi_ac_get_present(struct acpi_sbs *sbs)
int result = 0;
s16 charger_status;
result = acpi_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13,
&charger_status);
result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBC_SMBUS_ADDR, 0x13,
(u8 *)&charger_status);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR,
"acpi_sbs_read_word() failed"));
"acpi_smbus_read() failed"));
goto end;
}
@ -1614,15 +1399,6 @@ static int acpi_sbs_add(struct acpi_device *device)
struct acpi_sbs *sbs = NULL;
int result = 0, remove_result = 0;
int id;
acpi_status status = AE_OK;
unsigned long val;
status =
acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC"));
return -EIO;
}
sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
if (!sbs) {
@ -1635,8 +1411,8 @@ static int acpi_sbs_add(struct acpi_device *device)
sbs_mutex_lock(sbs);
sbs->base = 0xff & (val >> 8);
sbs->device = device;
sbs->hc = acpi_driver_data(device->parent);
strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_SBS_CLASS);

309
drivers/acpi/sbshc.c Normal file
View file

@ -0,0 +1,309 @@
/*
* SMBus driver for ACPI Embedded Controller (v0.1)
*
* Copyright (c) 2007 Alexey Starikovskiy
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2.
*/
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/actypes.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include "sbshc.h"
#define ACPI_SMB_HC_CLASS "smbus_host_controller"
#define ACPI_SMB_HC_DEVICE_NAME "ACPI SMBus HC"
struct acpi_smb_hc {
struct acpi_ec *ec;
struct mutex lock;
wait_queue_head_t wait;
u8 offset;
u8 query_bit;
smbus_alarm_callback callback;
void *context;
};
static int acpi_smbus_hc_add(struct acpi_device *device);
static int acpi_smbus_hc_remove(struct acpi_device *device, int type);
static const struct acpi_device_id sbs_device_ids[] = {
{"ACPI0001", 0},
{"ACPI0005", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
static struct acpi_driver acpi_smb_hc_driver = {
.name = "smbus_hc",
.class = ACPI_SMB_HC_CLASS,
.ids = sbs_device_ids,
.ops = {
.add = acpi_smbus_hc_add,
.remove = acpi_smbus_hc_remove,
},
};
union acpi_smb_status {
u8 raw;
struct {
u8 status:5;
u8 reserved:1;
u8 alarm:1;
u8 done:1;
} fields;
};
enum acpi_smb_status_codes {
SMBUS_OK = 0,
SMBUS_UNKNOWN_FAILURE = 0x07,
SMBUS_DEVICE_ADDRESS_NACK = 0x10,
SMBUS_DEVICE_ERROR = 0x11,
SMBUS_DEVICE_COMMAND_ACCESS_DENIED = 0x12,
SMBUS_UNKNOWN_ERROR = 0x13,
SMBUS_DEVICE_ACCESS_DENIED = 0x17,
SMBUS_TIMEOUT = 0x18,
SMBUS_HOST_UNSUPPORTED_PROTOCOL = 0x19,
SMBUS_BUSY = 0x1a,
SMBUS_PEC_ERROR = 0x1f,
};
enum acpi_smb_offset {
ACPI_SMB_PROTOCOL = 0, /* protocol, PEC */
ACPI_SMB_STATUS = 1, /* status */
ACPI_SMB_ADDRESS = 2, /* address */
ACPI_SMB_COMMAND = 3, /* command */
ACPI_SMB_DATA = 4, /* 32 data registers */
ACPI_SMB_BLOCK_COUNT = 0x24, /* number of data bytes */
ACPI_SMB_ALARM_ADDRESS = 0x25, /* alarm address */
ACPI_SMB_ALARM_DATA = 0x26, /* 2 bytes alarm data */
};
static inline int smb_hc_read(struct acpi_smb_hc *hc, u8 address, u8 *data)
{
return ec_read(hc->offset + address, data);
}
static inline int smb_hc_write(struct acpi_smb_hc *hc, u8 address, u8 data)
{
return ec_write(hc->offset + address, data);
}
static inline int smb_check_done(struct acpi_smb_hc *hc)
{
union acpi_smb_status status = {.raw = 0};
smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw);
return status.fields.done && (status.fields.status == SMBUS_OK);
}
static int wait_transaction_complete(struct acpi_smb_hc *hc, int timeout)
{
if (wait_event_timeout(hc->wait, smb_check_done(hc),
msecs_to_jiffies(timeout)))
return 0;
else
return -ETIME;
}
int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol, u8 address,
u8 command, u8 *data, u8 length)
{
int ret = -EFAULT, i;
u8 temp, sz = 0;
mutex_lock(&hc->lock);
if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))
goto end;
if (temp) {
ret = -EBUSY;
goto end;
}
smb_hc_write(hc, ACPI_SMB_COMMAND, command);
smb_hc_write(hc, ACPI_SMB_COMMAND, command);
if (!(protocol & 0x01)) {
smb_hc_write(hc, ACPI_SMB_BLOCK_COUNT, length);
for (i = 0; i < length; ++i)
smb_hc_write(hc, ACPI_SMB_DATA + i, data[i]);
}
smb_hc_write(hc, ACPI_SMB_ADDRESS, address << 1);
smb_hc_write(hc, ACPI_SMB_PROTOCOL, protocol);
/*
* Wait for completion. Save the status code, data size,
* and data into the return package (if required by the protocol).
*/
ret = wait_transaction_complete(hc, 1000);
if (ret || !(protocol & 0x01))
goto end;
switch (protocol) {
case SMBUS_RECEIVE_BYTE:
case SMBUS_READ_BYTE:
sz = 1;
break;
case SMBUS_READ_WORD:
sz = 2;
break;
case SMBUS_READ_BLOCK:
if (smb_hc_read(hc, ACPI_SMB_BLOCK_COUNT, &sz)) {
ret = -EFAULT;
goto end;
}
sz &= 0x1f;
break;
}
for (i = 0; i < sz; ++i)
smb_hc_read(hc, ACPI_SMB_DATA + i, &data[i]);
end:
mutex_unlock(&hc->lock);
return ret;
}
int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,
u8 command, u8 *data)
{
return acpi_smbus_transaction(hc, protocol, address, command, data, 0);
}
EXPORT_SYMBOL_GPL(acpi_smbus_read);
int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 address,
u8 command, u8 *data, u8 length)
{
return acpi_smbus_transaction(hc, protocol, address, command, data, length);
}
EXPORT_SYMBOL_GPL(acpi_smbus_write);
int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
smbus_alarm_callback callback, void *context)
{
mutex_lock(&hc->lock);
hc->callback = callback;
hc->context = context;
mutex_unlock(&hc->lock);
return 0;
}
EXPORT_SYMBOL_GPL(acpi_smbus_register_callback);
int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc)
{
mutex_lock(&hc->lock);
hc->callback = NULL;
hc->context = NULL;
mutex_unlock(&hc->lock);
return 0;
}
EXPORT_SYMBOL_GPL(acpi_smbus_unregister_callback);
static void acpi_smbus_callback(void *context)
{
struct acpi_smb_hc *hc = context;
if (hc->callback)
hc->callback(hc->context);
}
static int smbus_alarm(void *context)
{
struct acpi_smb_hc *hc = context;
union acpi_smb_status status;
if (smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw))
return 0;
/* Check if it is only a completion notify */
if (status.fields.done)
wake_up(&hc->wait);
if (!status.fields.alarm)
return 0;
mutex_lock(&hc->lock);
smb_hc_write(hc, ACPI_SMB_STATUS, status.raw);
if (hc->callback)
acpi_os_execute(OSL_GPE_HANDLER, acpi_smbus_callback, hc);
mutex_unlock(&hc->lock);
return 0;
}
typedef int (*acpi_ec_query_func) (void *data);
extern int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
acpi_handle handle, acpi_ec_query_func func,
void *data);
static int acpi_smbus_hc_add(struct acpi_device *device)
{
int status;
unsigned long val;
struct acpi_smb_hc *hc;
if (!device)
return -EINVAL;
status = acpi_evaluate_integer(device->handle, "_EC", NULL, &val);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX "error obtaining _EC.\n");
return -EIO;
}
strcpy(acpi_device_name(device), ACPI_SMB_HC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_SMB_HC_CLASS);
hc = kzalloc(sizeof(struct acpi_smb_hc), GFP_KERNEL);
if (!hc)
return -ENOMEM;
mutex_init(&hc->lock);
init_waitqueue_head(&hc->wait);
hc->ec = acpi_driver_data(device->parent);
hc->offset = (val >> 8) & 0xff;
hc->query_bit = val & 0xff;
acpi_driver_data(device) = hc;
acpi_ec_add_query_handler(hc->ec, hc->query_bit, NULL, smbus_alarm, hc);
printk(KERN_INFO PREFIX "SBS HC: EC = 0x%p, offset = 0x%0x, query_bit = 0x%0x\n",
hc->ec, hc->offset, hc->query_bit);
return 0;
}
extern void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit);
static int acpi_smbus_hc_remove(struct acpi_device *device, int type)
{
struct acpi_smb_hc *hc;
if (!device)
return -EINVAL;
hc = acpi_driver_data(device);
acpi_ec_remove_query_handler(hc->ec, hc->query_bit);
kfree(hc);
return 0;
}
static int __init acpi_smb_hc_init(void)
{
int result;
result = acpi_bus_register_driver(&acpi_smb_hc_driver);
if (result < 0)
return -ENODEV;
return 0;
}
static void __exit acpi_smb_hc_exit(void)
{
acpi_bus_unregister_driver(&acpi_smb_hc_driver);
}
module_init(acpi_smb_hc_init);
module_exit(acpi_smb_hc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alexey Starikovskiy");
MODULE_DESCRIPTION("ACPI SMBus HC driver");

27
drivers/acpi/sbshc.h Normal file
View file

@ -0,0 +1,27 @@
struct acpi_smb_hc;
enum acpi_smb_protocol {
SMBUS_WRITE_QUICK = 2,
SMBUS_READ_QUICK = 3,
SMBUS_SEND_BYTE = 4,
SMBUS_RECEIVE_BYTE = 5,
SMBUS_WRITE_BYTE = 6,
SMBUS_READ_BYTE = 7,
SMBUS_WRITE_WORD = 8,
SMBUS_READ_WORD = 9,
SMBUS_WRITE_BLOCK = 0xa,
SMBUS_READ_BLOCK = 0xb,
SMBUS_PROCESS_CALL = 0xc,
SMBUS_BLOCK_PROCESS_CALL = 0xd,
};
static const u8 SMBUS_PEC = 0x80;
typedef void (*smbus_alarm_callback)(void *context);
extern int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,
u8 command, u8 * data);
extern int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 slave_address,
u8 command, u8 * data, u8 length);
extern int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
smbus_alarm_callback callback, void *context);
extern int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc);