80 #define ACBSDA		(iface->base + 0)
81 #define ACBST		(iface->base + 1)
87 #define ACBCST		(iface->base + 2)
89 #define ACBCTL1		(iface->base + 3)
95 #define ACBADDR		(iface->base + 4)
96 #define ACBCTL2		(iface->base + 5)
101 static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)  in scx200_acb_machine()  argument
105 	dev_dbg(&iface->adapter.dev, "state %s, status = 0x%02x\n",  in scx200_acb_machine()
106 		scx200_acb_state_name[iface->state], status);  in scx200_acb_machine()
117 		dev_dbg(&iface->adapter.dev, "negative ack in state %s\n",  in scx200_acb_machine()
118 			scx200_acb_state_name[iface->state]);  in scx200_acb_machine()
120 		iface->state = state_idle;  in scx200_acb_machine()
121 		iface->result = -ENXIO;  in scx200_acb_machine()
131 	switch (iface->state) {  in scx200_acb_machine()
133 		dev_warn(&iface->adapter.dev, "interrupt in idle state\n");  in scx200_acb_machine()
138 		outb(iface->address_byte & ~1, ACBSDA);  in scx200_acb_machine()
140 		iface->state = state_command;  in scx200_acb_machine()
144 		outb(iface->command, ACBSDA);  in scx200_acb_machine()
146 		if (iface->address_byte & 1)  in scx200_acb_machine()
147 			iface->state = state_repeat_start;  in scx200_acb_machine()
149 			iface->state = state_write;  in scx200_acb_machine()
157 		if (iface->address_byte & 1) {  in scx200_acb_machine()
158 			if (iface->len == 1)  in scx200_acb_machine()
162 			outb(iface->address_byte, ACBSDA);  in scx200_acb_machine()
164 			iface->state = state_read;  in scx200_acb_machine()
166 			outb(iface->address_byte, ACBSDA);  in scx200_acb_machine()
168 			iface->state = state_write;  in scx200_acb_machine()
174 		if (iface->len == 2)  in scx200_acb_machine()
179 		if (iface->len == 1) {  in scx200_acb_machine()
180 			iface->result = 0;  in scx200_acb_machine()
181 			iface->state = state_idle;  in scx200_acb_machine()
185 		*iface->ptr++ = inb(ACBSDA);  in scx200_acb_machine()
186 		--iface->len;  in scx200_acb_machine()
191 		if (iface->len == 0) {  in scx200_acb_machine()
192 			iface->result = 0;  in scx200_acb_machine()
193 			iface->state = state_idle;  in scx200_acb_machine()
198 		outb(*iface->ptr++, ACBSDA);  in scx200_acb_machine()
199 		--iface->len;  in scx200_acb_machine()
207 	dev_err(&iface->adapter.dev,  in scx200_acb_machine()
209 		scx200_acb_state_name[iface->state], iface->address_byte,  in scx200_acb_machine()
210 		iface->len, status);  in scx200_acb_machine()
212 	iface->state = state_idle;  in scx200_acb_machine()
213 	iface->result = -EIO;  in scx200_acb_machine()
214 	iface->needs_reset = 1;  in scx200_acb_machine()
217 static void scx200_acb_poll(struct scx200_acb_iface *iface)  in scx200_acb_poll()  argument
230 			scx200_acb_machine(iface, status);  in scx200_acb_poll()
239 	dev_err(&iface->adapter.dev, "timeout in state %s\n",  in scx200_acb_poll()
240 		scx200_acb_state_name[iface->state]);  in scx200_acb_poll()
242 	iface->state = state_idle;  in scx200_acb_poll()
243 	iface->result = -EIO;  in scx200_acb_poll()
244 	iface->needs_reset = 1;  in scx200_acb_poll()
247 static void scx200_acb_reset(struct scx200_acb_iface *iface)  in scx200_acb_reset()  argument
273 	struct scx200_acb_iface *iface = i2c_get_adapdata(adapter);  in scx200_acb_smbus_xfer()  local
321 	mutex_lock(&iface->mutex);  in scx200_acb_smbus_xfer()
323 	iface->address_byte = (address << 1) | rw;  in scx200_acb_smbus_xfer()
324 	iface->command = command;  in scx200_acb_smbus_xfer()
325 	iface->ptr = buffer;  in scx200_acb_smbus_xfer()
326 	iface->len = len;  in scx200_acb_smbus_xfer()
327 	iface->result = -EINVAL;  in scx200_acb_smbus_xfer()
328 	iface->needs_reset = 0;  in scx200_acb_smbus_xfer()
333 		iface->state = state_quick;  in scx200_acb_smbus_xfer()
335 		iface->state = state_address;  in scx200_acb_smbus_xfer()
337 	while (iface->state != state_idle)  in scx200_acb_smbus_xfer()
338 		scx200_acb_poll(iface);  in scx200_acb_smbus_xfer()
340 	if (iface->needs_reset)  in scx200_acb_smbus_xfer()
341 		scx200_acb_reset(iface);  in scx200_acb_smbus_xfer()
343 	rc = iface->result;  in scx200_acb_smbus_xfer()
345 	mutex_unlock(&iface->mutex);  in scx200_acb_smbus_xfer()
380 static int scx200_acb_probe(struct scx200_acb_iface *iface)  in scx200_acb_probe()  argument
418 	struct scx200_acb_iface *iface;  in scx200_create_iface()  local
421 	iface = kzalloc(sizeof(*iface), GFP_KERNEL);  in scx200_create_iface()
422 	if (!iface)  in scx200_create_iface()
425 	adapter = &iface->adapter;  in scx200_create_iface()
426 	i2c_set_adapdata(adapter, iface);  in scx200_create_iface()
433 	mutex_init(&iface->mutex);  in scx200_create_iface()
435 	return iface;  in scx200_create_iface()
438 static int scx200_acb_create(struct scx200_acb_iface *iface)  in scx200_acb_create()  argument
443 	adapter = &iface->adapter;  in scx200_acb_create()
445 	rc = scx200_acb_probe(iface);  in scx200_acb_create()
451 	scx200_acb_reset(iface);  in scx200_acb_create()
461 		iface->next = scx200_acb_list;  in scx200_acb_create()
462 		scx200_acb_list = iface;  in scx200_acb_create()
472 	struct scx200_acb_iface *iface;  in scx200_create_dev()  local
475 	iface = scx200_create_iface(text, dev, index);  in scx200_create_dev()
477 	if (iface == NULL)  in scx200_create_dev()
480 	if (!request_region(base, 8, iface->adapter.name)) {  in scx200_create_dev()
485 	iface->base = base;  in scx200_create_dev()
486 	rc = scx200_acb_create(iface);  in scx200_create_dev()
489 		return iface;  in scx200_create_dev()
493 	kfree(iface);  in scx200_create_dev()
499 	struct scx200_acb_iface *iface;  in scx200_probe()  local
508 	iface = scx200_create_dev("CS5535", res->start, 0, &pdev->dev);  in scx200_probe()
509 	if (!iface)  in scx200_probe()
513 			iface->adapter.name);  in scx200_probe()
514 	platform_set_drvdata(pdev, iface);  in scx200_probe()
519 static void scx200_cleanup_iface(struct scx200_acb_iface *iface)  in scx200_cleanup_iface()  argument
521 	i2c_del_adapter(&iface->adapter);  in scx200_cleanup_iface()
522 	release_region(iface->base, 8);  in scx200_cleanup_iface()
523 	kfree(iface);  in scx200_cleanup_iface()
528 	struct scx200_acb_iface *iface;  in scx200_remove()  local
530 	iface = platform_get_drvdata(pdev);  in scx200_remove()
531 	scx200_cleanup_iface(iface);  in scx200_remove()
583 	struct scx200_acb_iface *iface;  in scx200_acb_cleanup()  local
588 	while ((iface = scx200_acb_list) != NULL) {  in scx200_acb_cleanup()
589 		scx200_acb_list = iface->next;  in scx200_acb_cleanup()
592 		scx200_cleanup_iface(iface);  in scx200_acb_cleanup()