93 static inline int smb_hc_read(struct acpi_smb_hc *hc, u8 address, u8 *data)  in smb_hc_read()  argument
95 	return ec_read(hc->offset + address, data);  in smb_hc_read()
98 static inline int smb_hc_write(struct acpi_smb_hc *hc, u8 address, u8 data)  in smb_hc_write()  argument
100 	return ec_write(hc->offset + address, data);  in smb_hc_write()
103 static inline int smb_check_done(struct acpi_smb_hc *hc)  in smb_check_done()  argument
106 	smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw);  in smb_check_done()
110 static int wait_transaction_complete(struct acpi_smb_hc *hc, int timeout)  in wait_transaction_complete()  argument
112 	if (wait_event_timeout(hc->wait, smb_check_done(hc),  in wait_transaction_complete()
120 	if (smb_check_done(hc))  in wait_transaction_complete()
126 static int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol,  in acpi_smbus_transaction()  argument
132 	if (!hc) {  in acpi_smbus_transaction()
137 	mutex_lock(&hc->lock);  in acpi_smbus_transaction()
140 	if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))  in acpi_smbus_transaction()
146 	smb_hc_write(hc, ACPI_SMB_COMMAND, command);  in acpi_smbus_transaction()
148 		smb_hc_write(hc, ACPI_SMB_BLOCK_COUNT, length);  in acpi_smbus_transaction()
150 			smb_hc_write(hc, ACPI_SMB_DATA + i, data[i]);  in acpi_smbus_transaction()
152 	smb_hc_write(hc, ACPI_SMB_ADDRESS, address << 1);  in acpi_smbus_transaction()
153 	smb_hc_write(hc, ACPI_SMB_PROTOCOL, protocol);  in acpi_smbus_transaction()
158 	ret = wait_transaction_complete(hc, 1000);  in acpi_smbus_transaction()
170 		if (smb_hc_read(hc, ACPI_SMB_BLOCK_COUNT, &sz)) {  in acpi_smbus_transaction()
178 		smb_hc_read(hc, ACPI_SMB_DATA + i, &data[i]);  in acpi_smbus_transaction()
180 	mutex_unlock(&hc->lock);  in acpi_smbus_transaction()
184 int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,  in acpi_smbus_read()  argument
187 	return acpi_smbus_transaction(hc, protocol, address, command, data, 0);  in acpi_smbus_read()
192 int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 address,  in acpi_smbus_write()  argument
195 	return acpi_smbus_transaction(hc, protocol, address, command, data, length);  in acpi_smbus_write()
200 int acpi_smbus_register_callback(struct acpi_smb_hc *hc,  in acpi_smbus_register_callback()  argument
203 	mutex_lock(&hc->lock);  in acpi_smbus_register_callback()
204 	hc->callback = callback;  in acpi_smbus_register_callback()
205 	hc->context = context;  in acpi_smbus_register_callback()
206 	mutex_unlock(&hc->lock);  in acpi_smbus_register_callback()
212 int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc)  in acpi_smbus_unregister_callback()  argument
214 	mutex_lock(&hc->lock);  in acpi_smbus_unregister_callback()
215 	hc->callback = NULL;  in acpi_smbus_unregister_callback()
216 	hc->context = NULL;  in acpi_smbus_unregister_callback()
217 	mutex_unlock(&hc->lock);  in acpi_smbus_unregister_callback()
225 	struct acpi_smb_hc *hc = context;  in acpi_smbus_callback()  local
226 	if (hc->callback)  in acpi_smbus_callback()
227 		hc->callback(hc->context);  in acpi_smbus_callback()
232 	struct acpi_smb_hc *hc = context;  in smbus_alarm()  local
235 	if (smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw))  in smbus_alarm()
239 		wake_up(&hc->wait);  in smbus_alarm()
242 	mutex_lock(&hc->lock);  in smbus_alarm()
243 	smb_hc_read(hc, ACPI_SMB_ALARM_ADDRESS, &address);  in smbus_alarm()
245 	smb_hc_write(hc, ACPI_SMB_STATUS, status.raw);  in smbus_alarm()
252 					acpi_smbus_callback, hc);  in smbus_alarm()
255 	mutex_unlock(&hc->lock);  in smbus_alarm()
284 	struct acpi_smb_hc *hc;  in acpi_smbus_hc_add()  local
300 	hc = kzalloc(sizeof(struct acpi_smb_hc), GFP_KERNEL);  in acpi_smbus_hc_add()
301 	if (!hc)  in acpi_smbus_hc_add()
303 	mutex_init(&hc->lock);  in acpi_smbus_hc_add()
304 	init_waitqueue_head(&hc->wait);  in acpi_smbus_hc_add()
306 	hc->ec = acpi_driver_data(device->parent);  in acpi_smbus_hc_add()
307 	hc->offset = (val >> 8) & 0xff;  in acpi_smbus_hc_add()
308 	hc->query_bit = val & 0xff;  in acpi_smbus_hc_add()
309 	device->driver_data = hc;  in acpi_smbus_hc_add()
311 	acpi_ec_add_query_handler(hc->ec, hc->query_bit, NULL, smbus_alarm, hc);  in acpi_smbus_hc_add()
313 		hc->ec, hc->offset, hc->query_bit);  in acpi_smbus_hc_add()
322 	struct acpi_smb_hc *hc;  in acpi_smbus_hc_remove()  local
327 	hc = acpi_driver_data(device);  in acpi_smbus_hc_remove()
328 	acpi_ec_remove_query_handler(hc->ec, hc->query_bit);  in acpi_smbus_hc_remove()
329 	kfree(hc);  in acpi_smbus_hc_remove()