1 // SPDX-License-Identifier: GPL-2.0-only
3  *	i2c-ali1563.c - i2c driver for the ALi 1563 Southbridge
68 	int timeout;  in ali1563_transaction()  local
69 	int status = -EIO;  in ali1563_transaction()
71 	dev_dbg(&a->dev, "Transaction (pre): STS=%02x, CNTL1=%02x, "  in ali1563_transaction()
79 		dev_err(&a->dev, "ali1563: Trying to reset busy device\n");  in ali1563_transaction()
83 			return -EBUSY;  in ali1563_transaction()
87 	timeout = ALI1563_MAX_TIMEOUT;  in ali1563_transaction()
90 	} while (((data = inb_p(SMB_HST_STS)) & HST_STS_BUSY) && --timeout);  in ali1563_transaction()
92 	dev_dbg(&a->dev, "Transaction (post): STS=%02x, CNTL1=%02x, "  in ali1563_transaction()
98 	if (timeout && !(data & HST_STS_BAD))  in ali1563_transaction()
101 	if (!timeout) {  in ali1563_transaction()
102 		dev_err(&a->dev, "Timeout - Trying to KILL transaction!\n");  in ali1563_transaction()
106 		status = -ETIMEDOUT;  in ali1563_transaction()
109 	/* device error - no response, ignore the autodetection case */  in ali1563_transaction()
112 			dev_err(&a->dev, "Device error!\n");  in ali1563_transaction()
113 		status = -ENXIO;  in ali1563_transaction()
117 		dev_err(&a->dev, "Bus collision!\n");  in ali1563_transaction()
118 		/* Issue timeout, hoping it helps */  in ali1563_transaction()
123 		dev_err(&a->dev, "Cleaning fail after KILL!\n");  in ali1563_transaction()
133 	int timeout;  in ali1563_block_start()  local
134 	int status = -EIO;  in ali1563_block_start()
136 	dev_dbg(&a->dev, "Block (pre): STS=%02x, CNTL1=%02x, "  in ali1563_block_start()
144 		dev_warn(&a->dev, "ali1563: Trying to reset busy device\n");  in ali1563_block_start()
148 			return -EBUSY;  in ali1563_block_start()
151 	/* Clear byte-ready bit */  in ali1563_block_start()
154 	/* Start transaction and wait for byte-ready bit to be set */  in ali1563_block_start()
157 	timeout = ALI1563_MAX_TIMEOUT;  in ali1563_block_start()
160 	} while (!((data = inb_p(SMB_HST_STS)) & HST_STS_DONE) && --timeout);  in ali1563_block_start()
162 	dev_dbg(&a->dev, "Block (post): STS=%02x, CNTL1=%02x, "  in ali1563_block_start()
168 	if (timeout && !(data & HST_STS_BAD))  in ali1563_block_start()
171 	if (timeout == 0)  in ali1563_block_start()
172 		status = -ETIMEDOUT;  in ali1563_block_start()
175 		status = -ENXIO;  in ali1563_block_start()
177 	dev_err(&a->dev, "SMBus Error: %s%s%s%s%s\n",  in ali1563_block_start()
178 		timeout ? "" : "Timeout ",  in ali1563_block_start()
196 		len = data->block[0];  in ali1563_block()
202 		outb_p(data->block[1], SMB_BLK_DAT);  in ali1563_block()
210 			outb_p(data->block[i + 1], SMB_BLK_DAT);  in ali1563_block()
225 			data->block[i+1] = inb_p(SMB_BLK_DAT);  in ali1563_block()
238 	int timeout;  in ali1563_access()  local
241 	for (timeout = ALI1563_MAX_TIMEOUT; timeout; timeout--) {  in ali1563_access()
246 	if (!timeout)  in ali1563_access()
247 		dev_warn(&a->dev, "SMBus not idle. HST_STS = %02x\n", reg);  in ali1563_access()
268 		dev_warn(&a->dev, "Unsupported transaction %d\n", size);  in ali1563_access()
269 		error = -EOPNOTSUPP;  in ali1563_access()
288 			outb_p(data->byte, SMB_HST_DAT0);  in ali1563_access()
293 			outb_p(data->word & 0xff, SMB_HST_DAT0);  in ali1563_access()
294 			outb_p((data->word & 0xff00) >> 8, SMB_HST_DAT1);  in ali1563_access()
312 		data->byte = inb_p(SMB_HST_DAT0);  in ali1563_access()
315 		data->byte = inb_p(SMB_HST_DAT0);  in ali1563_access()
318 		data->word = inb_p(SMB_HST_DAT0) + (inb_p(SMB_HST_DAT1) << 8);  in ali1563_access()
341 	ali1563_smba = ctrl & ~(ALI1563_SMB_IOSIZE - 1);  in ali1563_setup()
343 		dev_warn(&dev->dev, "ali1563_smba Uninitialized\n");  in ali1563_setup()
349 		dev_warn(&dev->dev, "Host Controller not enabled\n");  in ali1563_setup()
353 		dev_warn(&dev->dev, "I/O space not enabled, trying manually\n");  in ali1563_setup()
358 			dev_err(&dev->dev,  in ali1563_setup()
370 		dev_err(&dev->dev, "Could not allocate I/O space at 0x%04x\n",  in ali1563_setup()
374 	dev_info(&dev->dev, "Found ALi1563 SMBus at 0x%04x\n", ali1563_smba);  in ali1563_setup()
378 	return -ENODEV;  in ali1563_setup()
405 	ali1563_adapter.dev.parent = &dev->dev;  in ali1563_probe()
416 	dev_warn(&dev->dev, "ALi1563 SMBus probe failed (%d)\n", error);  in ali1563_probe()