88 #define ACBSDA		(iface->base + 0)
89 #define ACBST		(iface->base + 1)
95 #define ACBCST		(iface->base + 2)
97 #define ACBCTL1		(iface->base + 3)
103 #define ACBADDR		(iface->base + 4)
104 #define ACBCTL2		(iface->base + 5)
109 static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)  in scx200_acb_machine()  argument
113 	dev_dbg(&iface->adapter.dev, "state %s, status = 0x%02x\n",  in scx200_acb_machine()
114 		scx200_acb_state_name[iface->state], status);  in scx200_acb_machine()
125 		dev_dbg(&iface->adapter.dev, "negative ack in state %s\n",  in scx200_acb_machine()
126 			scx200_acb_state_name[iface->state]);  in scx200_acb_machine()
128 		iface->state = state_idle;  in scx200_acb_machine()
129 		iface->result = -ENXIO;  in scx200_acb_machine()
139 	switch (iface->state) {  in scx200_acb_machine()
141 		dev_warn(&iface->adapter.dev, "interrupt in idle state\n");  in scx200_acb_machine()
146 		outb(iface->address_byte & ~1, ACBSDA);  in scx200_acb_machine()
148 		iface->state = state_command;  in scx200_acb_machine()
152 		outb(iface->command, ACBSDA);  in scx200_acb_machine()
154 		if (iface->address_byte & 1)  in scx200_acb_machine()
155 			iface->state = state_repeat_start;  in scx200_acb_machine()
157 			iface->state = state_write;  in scx200_acb_machine()
165 		if (iface->address_byte & 1) {  in scx200_acb_machine()
166 			if (iface->len == 1)  in scx200_acb_machine()
170 			outb(iface->address_byte, ACBSDA);  in scx200_acb_machine()
172 			iface->state = state_read;  in scx200_acb_machine()
174 			outb(iface->address_byte, ACBSDA);  in scx200_acb_machine()
176 			iface->state = state_write;  in scx200_acb_machine()
182 		if (iface->len == 2)  in scx200_acb_machine()
187 		if (iface->len == 1) {  in scx200_acb_machine()
188 			iface->result = 0;  in scx200_acb_machine()
189 			iface->state = state_idle;  in scx200_acb_machine()
193 		*iface->ptr++ = inb(ACBSDA);  in scx200_acb_machine()
194 		--iface->len;  in scx200_acb_machine()
199 		if (iface->len == 0) {  in scx200_acb_machine()
200 			iface->result = 0;  in scx200_acb_machine()
201 			iface->state = state_idle;  in scx200_acb_machine()
206 		outb(*iface->ptr++, ACBSDA);  in scx200_acb_machine()
207 		--iface->len;  in scx200_acb_machine()
215 	dev_err(&iface->adapter.dev,  in scx200_acb_machine()
217 		scx200_acb_state_name[iface->state], iface->address_byte,  in scx200_acb_machine()
218 		iface->len, status);  in scx200_acb_machine()
220 	iface->state = state_idle;  in scx200_acb_machine()
221 	iface->result = -EIO;  in scx200_acb_machine()
222 	iface->needs_reset = 1;  in scx200_acb_machine()
225 static void scx200_acb_poll(struct scx200_acb_iface *iface)  in scx200_acb_poll()  argument
238 			scx200_acb_machine(iface, status);  in scx200_acb_poll()
247 	dev_err(&iface->adapter.dev, "timeout in state %s\n",  in scx200_acb_poll()
248 		scx200_acb_state_name[iface->state]);  in scx200_acb_poll()
250 	iface->state = state_idle;  in scx200_acb_poll()
251 	iface->result = -EIO;  in scx200_acb_poll()
252 	iface->needs_reset = 1;  in scx200_acb_poll()
255 static void scx200_acb_reset(struct scx200_acb_iface *iface)  in scx200_acb_reset()  argument
281 	struct scx200_acb_iface *iface = i2c_get_adapdata(adapter);  in scx200_acb_smbus_xfer()  local
329 	mutex_lock(&iface->mutex);  in scx200_acb_smbus_xfer()
331 	iface->address_byte = (address << 1) | rw;  in scx200_acb_smbus_xfer()
332 	iface->command = command;  in scx200_acb_smbus_xfer()
333 	iface->ptr = buffer;  in scx200_acb_smbus_xfer()
334 	iface->len = len;  in scx200_acb_smbus_xfer()
335 	iface->result = -EINVAL;  in scx200_acb_smbus_xfer()
336 	iface->needs_reset = 0;  in scx200_acb_smbus_xfer()
341 		iface->state = state_quick;  in scx200_acb_smbus_xfer()
343 		iface->state = state_address;  in scx200_acb_smbus_xfer()
345 	while (iface->state != state_idle)  in scx200_acb_smbus_xfer()
346 		scx200_acb_poll(iface);  in scx200_acb_smbus_xfer()
348 	if (iface->needs_reset)  in scx200_acb_smbus_xfer()
349 		scx200_acb_reset(iface);  in scx200_acb_smbus_xfer()
351 	rc = iface->result;  in scx200_acb_smbus_xfer()
353 	mutex_unlock(&iface->mutex);  in scx200_acb_smbus_xfer()
388 static int scx200_acb_probe(struct scx200_acb_iface *iface)  in scx200_acb_probe()  argument
426 	struct scx200_acb_iface *iface;  in scx200_create_iface()  local
429 	iface = kzalloc(sizeof(*iface), GFP_KERNEL);  in scx200_create_iface()
430 	if (!iface)  in scx200_create_iface()
433 	adapter = &iface->adapter;  in scx200_create_iface()
434 	i2c_set_adapdata(adapter, iface);  in scx200_create_iface()
441 	mutex_init(&iface->mutex);  in scx200_create_iface()
443 	return iface;  in scx200_create_iface()
446 static int scx200_acb_create(struct scx200_acb_iface *iface)  in scx200_acb_create()  argument
451 	adapter = &iface->adapter;  in scx200_acb_create()
453 	rc = scx200_acb_probe(iface);  in scx200_acb_create()
459 	scx200_acb_reset(iface);  in scx200_acb_create()
469 		iface->next = scx200_acb_list;  in scx200_acb_create()
470 		scx200_acb_list = iface;  in scx200_acb_create()
480 	struct scx200_acb_iface *iface;  in scx200_create_dev()  local
483 	iface = scx200_create_iface(text, dev, index);  in scx200_create_dev()
485 	if (iface == NULL)  in scx200_create_dev()
488 	if (!request_region(base, 8, iface->adapter.name)) {  in scx200_create_dev()
493 	iface->base = base;  in scx200_create_dev()
494 	rc = scx200_acb_create(iface);  in scx200_create_dev()
497 		return iface;  in scx200_create_dev()
501 	kfree(iface);  in scx200_create_dev()
507 	struct scx200_acb_iface *iface;  in scx200_probe()  local
516 	iface = scx200_create_dev("CS5535", res->start, 0, &pdev->dev);  in scx200_probe()
517 	if (!iface)  in scx200_probe()
521 			iface->adapter.name);  in scx200_probe()
522 	platform_set_drvdata(pdev, iface);  in scx200_probe()
527 static void scx200_cleanup_iface(struct scx200_acb_iface *iface)  in scx200_cleanup_iface()  argument
529 	i2c_del_adapter(&iface->adapter);  in scx200_cleanup_iface()
530 	release_region(iface->base, 8);  in scx200_cleanup_iface()
531 	kfree(iface);  in scx200_cleanup_iface()
536 	struct scx200_acb_iface *iface;  in scx200_remove()  local
538 	iface = platform_get_drvdata(pdev);  in scx200_remove()
539 	scx200_cleanup_iface(iface);  in scx200_remove()
591 	struct scx200_acb_iface *iface;  in scx200_acb_cleanup()  local
596 	while ((iface = scx200_acb_list) != NULL) {  in scx200_acb_cleanup()
597 		scx200_acb_list = iface->next;  in scx200_acb_cleanup()
600 		scx200_cleanup_iface(iface);  in scx200_acb_cleanup()