91 static inline int smb_hc_read(struct acpi_smb_hc *hc, u8 address, u8 *data)  in smb_hc_read()  argument
93 	return ec_read(hc->offset + address, data);  in smb_hc_read()
96 static inline int smb_hc_write(struct acpi_smb_hc *hc, u8 address, u8 data)  in smb_hc_write()  argument
98 	return ec_write(hc->offset + address, data);  in smb_hc_write()
101 static int wait_transaction_complete(struct acpi_smb_hc *hc, int timeout)  in wait_transaction_complete()  argument
103 	if (wait_event_timeout(hc->wait, hc->done, msecs_to_jiffies(timeout)))  in wait_transaction_complete()
108 static int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol,  in acpi_smbus_transaction()  argument
114 	if (!hc) {  in acpi_smbus_transaction()
119 	mutex_lock(&hc->lock);  in acpi_smbus_transaction()
120 	hc->done = false;  in acpi_smbus_transaction()
121 	if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))  in acpi_smbus_transaction()
127 	smb_hc_write(hc, ACPI_SMB_COMMAND, command);  in acpi_smbus_transaction()
129 		smb_hc_write(hc, ACPI_SMB_BLOCK_COUNT, length);  in acpi_smbus_transaction()
131 			smb_hc_write(hc, ACPI_SMB_DATA + i, data[i]);  in acpi_smbus_transaction()
133 	smb_hc_write(hc, ACPI_SMB_ADDRESS, address << 1);  in acpi_smbus_transaction()
134 	smb_hc_write(hc, ACPI_SMB_PROTOCOL, protocol);  in acpi_smbus_transaction()
139 	ret = wait_transaction_complete(hc, 1000);  in acpi_smbus_transaction()
151 		if (smb_hc_read(hc, ACPI_SMB_BLOCK_COUNT, &sz)) {  in acpi_smbus_transaction()
159 		smb_hc_read(hc, ACPI_SMB_DATA + i, &data[i]);  in acpi_smbus_transaction()
161 	mutex_unlock(&hc->lock);  in acpi_smbus_transaction()
165 int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,  in acpi_smbus_read()  argument
168 	return acpi_smbus_transaction(hc, protocol, address, command, data, 0);  in acpi_smbus_read()
173 int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 address,  in acpi_smbus_write()  argument
176 	return acpi_smbus_transaction(hc, protocol, address, command, data, length);  in acpi_smbus_write()
181 int acpi_smbus_register_callback(struct acpi_smb_hc *hc,  in acpi_smbus_register_callback()  argument
184 	mutex_lock(&hc->lock);  in acpi_smbus_register_callback()
185 	hc->callback = callback;  in acpi_smbus_register_callback()
186 	hc->context = context;  in acpi_smbus_register_callback()
187 	mutex_unlock(&hc->lock);  in acpi_smbus_register_callback()
193 int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc)  in acpi_smbus_unregister_callback()  argument
195 	mutex_lock(&hc->lock);  in acpi_smbus_unregister_callback()
196 	hc->callback = NULL;  in acpi_smbus_unregister_callback()
197 	hc->context = NULL;  in acpi_smbus_unregister_callback()
198 	mutex_unlock(&hc->lock);  in acpi_smbus_unregister_callback()
206 	struct acpi_smb_hc *hc = context;  in acpi_smbus_callback()  local
207 	if (hc->callback)  in acpi_smbus_callback()
208 		hc->callback(hc->context);  in acpi_smbus_callback()
213 	struct acpi_smb_hc *hc = context;  in smbus_alarm()  local
216 	if (smb_hc_read(hc, ACPI_SMB_STATUS, &status.raw))  in smbus_alarm()
220 		hc->done = true;  in smbus_alarm()
221 		wake_up(&hc->wait);  in smbus_alarm()
225 	mutex_lock(&hc->lock);  in smbus_alarm()
226 	smb_hc_read(hc, ACPI_SMB_ALARM_ADDRESS, &address);  in smbus_alarm()
228 	smb_hc_write(hc, ACPI_SMB_STATUS, status.raw);  in smbus_alarm()
235 					acpi_smbus_callback, hc);  in smbus_alarm()
238 	mutex_unlock(&hc->lock);  in smbus_alarm()
252 	struct acpi_smb_hc *hc;  in acpi_smbus_hc_add()  local
266 	hc = kzalloc(sizeof(struct acpi_smb_hc), GFP_KERNEL);  in acpi_smbus_hc_add()
267 	if (!hc)  in acpi_smbus_hc_add()
269 	mutex_init(&hc->lock);  in acpi_smbus_hc_add()
270 	init_waitqueue_head(&hc->wait);  in acpi_smbus_hc_add()
272 	hc->ec = acpi_driver_data(device->parent);  in acpi_smbus_hc_add()
273 	hc->offset = (val >> 8) & 0xff;  in acpi_smbus_hc_add()
274 	hc->query_bit = val & 0xff;  in acpi_smbus_hc_add()
275 	device->driver_data = hc;  in acpi_smbus_hc_add()
277 	acpi_ec_add_query_handler(hc->ec, hc->query_bit, NULL, smbus_alarm, hc);  in acpi_smbus_hc_add()
279 		hc->ec, hc->offset, hc->query_bit);  in acpi_smbus_hc_add()
288 	struct acpi_smb_hc *hc;  in acpi_smbus_hc_remove()  local
293 	hc = acpi_driver_data(device);  in acpi_smbus_hc_remove()
294 	acpi_ec_remove_query_handler(hc->ec, hc->query_bit);  in acpi_smbus_hc_remove()
295 	kfree(hc);  in acpi_smbus_hc_remove()