diff options
| -rw-r--r-- | drivers/acpi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/acpi/sbs.c | 374 | ||||
| -rw-r--r-- | drivers/acpi/sbshc.c | 309 | ||||
| -rw-r--r-- | drivers/acpi/sbshc.h | 27 |
4 files changed, 412 insertions, 299 deletions
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index d4336f1730e..54e3ab0e5fc 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -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 diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c index 33ba4bf551e..7bb8c62fb92 100644 --- a/drivers/acpi/sbs.c +++ b/drivers/acpi/sbs.c @@ -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); diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c new file mode 100644 index 00000000000..046d7c3ed35 --- /dev/null +++ b/drivers/acpi/sbshc.c @@ -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"); diff --git a/drivers/acpi/sbshc.h b/drivers/acpi/sbshc.h new file mode 100644 index 00000000000..3bda3491a97 --- /dev/null +++ b/drivers/acpi/sbshc.h @@ -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); 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