1 // SPDX-License-Identifier: GPL-2.0-only
3  *	i2c-ali1563.c - i2c driver for the ALi 1563 Southbridge
69 	int status = -EIO;  in ali1563_transaction()
71 	dev_dbg(&a->dev, "Transaction (pre): STS=%02x, CNTL1=%02x, "  in ali1563_transaction()
72 		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",  in ali1563_transaction()
79 		dev_err(&a->dev, "ali1563: Trying to reset busy device\n");  in ali1563_transaction()
83 			return -EBUSY;  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()
93 		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",  in ali1563_transaction()
105 		status = -ETIMEDOUT;  in ali1563_transaction()
108 	/* device error - no response, ignore the autodetection case */  in ali1563_transaction()
111 			dev_err(&a->dev, "Device error!\n");  in ali1563_transaction()
112 		status = -ENXIO;  in ali1563_transaction()
116 		dev_err(&a->dev, "Bus collision!\n");  in ali1563_transaction()
122 		dev_err(&a->dev, "Cleaning fail after KILL!\n");  in ali1563_transaction()
133 	int status = -EIO;  in ali1563_block_start()
135 	dev_dbg(&a->dev, "Block (pre): STS=%02x, CNTL1=%02x, "  in ali1563_block_start()
136 		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",  in ali1563_block_start()
143 		dev_warn(&a->dev, "ali1563: Trying to reset busy device\n");  in ali1563_block_start()
147 			return -EBUSY;  in ali1563_block_start()
150 	/* Clear byte-ready bit */  in ali1563_block_start()
153 	/* Start transaction and wait for byte-ready bit to be set */  in ali1563_block_start()
159 	} while (!((data = inb_p(SMB_HST_STS)) & HST_STS_DONE) && --timeout);  in ali1563_block_start()
161 	dev_dbg(&a->dev, "Block (post): STS=%02x, CNTL1=%02x, "  in ali1563_block_start()
162 		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",  in ali1563_block_start()
171 		status = -ETIMEDOUT;  in ali1563_block_start()
174 		status = -ENXIO;  in ali1563_block_start()
176 	dev_err(&a->dev, "SMBus Error: %s%s%s%s%s\n",  in ali1563_block_start()
195 		len = data->block[0];  in ali1563_block()
201 		outb_p(data->block[1], SMB_BLK_DAT);  in ali1563_block()
209 			outb_p(data->block[i + 1], SMB_BLK_DAT);  in ali1563_block()
224 			data->block[i+1] = inb_p(SMB_BLK_DAT);  in ali1563_block()
240 	for (timeout = ALI1563_MAX_TIMEOUT; timeout; timeout--) {  in ali1563_access()
246 		dev_warn(&a->dev, "SMBus not idle. HST_STS = %02x\n", reg);  in ali1563_access()
267 		dev_warn(&a->dev, "Unsupported transaction %d\n", size);  in ali1563_access()
268 		error = -EOPNOTSUPP;  in ali1563_access()
287 			outb_p(data->byte, SMB_HST_DAT0);  in ali1563_access()
292 			outb_p(data->word & 0xff, SMB_HST_DAT0);  in ali1563_access()
293 			outb_p((data->word & 0xff00) >> 8, SMB_HST_DAT1);  in ali1563_access()
311 		data->byte = inb_p(SMB_HST_DAT0);  in ali1563_access()
314 		data->byte = inb_p(SMB_HST_DAT0);  in ali1563_access()
317 		data->word = inb_p(SMB_HST_DAT0) + (inb_p(SMB_HST_DAT1) << 8);  in ali1563_access()
334 	u16 ctrl;  in ali1563_setup()  local
336 	pci_read_config_word(dev, ALI1563_SMBBA, &ctrl);  in ali1563_setup()
340 	ali1563_smba = ctrl & ~(ALI1563_SMB_IOSIZE - 1);  in ali1563_setup()
342 		dev_warn(&dev->dev, "ali1563_smba Uninitialized\n");  in ali1563_setup()
347 	if (!(ctrl & ALI1563_SMB_HOSTEN)) {  in ali1563_setup()
348 		dev_warn(&dev->dev, "Host Controller not enabled\n");  in ali1563_setup()
351 	if (!(ctrl & ALI1563_SMB_IOEN)) {  in ali1563_setup()
352 		dev_warn(&dev->dev, "I/O space not enabled, trying manually\n");  in ali1563_setup()
354 				      ctrl | ALI1563_SMB_IOEN);  in ali1563_setup()
355 		pci_read_config_word(dev, ALI1563_SMBBA, &ctrl);  in ali1563_setup()
356 		if (!(ctrl & ALI1563_SMB_IOEN)) {  in ali1563_setup()
357 			dev_err(&dev->dev,  in ali1563_setup()
369 		dev_err(&dev->dev, "Could not allocate I/O space at 0x%04x\n",  in ali1563_setup()
373 	dev_info(&dev->dev, "Found ALi1563 SMBus at 0x%04x\n", ali1563_smba);  in ali1563_setup()
377 	return -ENODEV;  in ali1563_setup()
404 	ali1563_adapter.dev.parent = &dev->dev;  in ali1563_probe()
415 	dev_warn(&dev->dev, "ALi1563 SMBus probe failed (%d)\n", error);  in ali1563_probe()