1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
6  * Copyright (c) 2017-2018 Panasas
87 	sc->dev = dev;  in imcsmb_attach()
88 	sc->imcsmb_pci = device_get_parent(dev);  in imcsmb_attach()
89 	sc->regs = device_get_ivars(dev);  in imcsmb_attach()
92 	sc->smbus = device_add_child(dev, "smbus", DEVICE_UNIT_ANY);  in imcsmb_attach()
93 	if (sc->smbus == NULL) {  in imcsmb_attach()
126  * smbus_callback() method. Call the parent imcsmb_pci's request or release
157 		rc = imcsmb_pci_request_bus(sc->imcsmb_pci);  in imcsmb_callback()
161 		imcsmb_pci_release_bus(sc->imcsmb_pci);  in imcsmb_callback()
319 	orig_cntl_val = pci_read_config(sc->imcsmb_pci,  in imcsmb_transfer()
320 	    sc->regs->smb_cntl, 4);  in imcsmb_transfer()
363 	/* [26:24] The three non-DTI, non-R/W bits of the slave address. */  in imcsmb_transfer()
376 			 *      I2C: [15:8] = MSB; [7:0] = LSB  in imcsmb_transfer()
377 			 *      SMB: [15:8] = LSB; [7:0] = MSB  in imcsmb_transfer()
382 			 * the temperature sensors are I2C. Thus, byte-swap the  in imcsmb_transfer()
387 			/* For byte operations, the data goes in the LSB, and  in imcsmb_transfer()
398 	pci_write_config(sc->imcsmb_pci, sc->regs->smb_cntl, cntl_val, 4);  in imcsmb_transfer()
401 	 * We just cleared the auto-poll bit, so we need to make sure the device  in imcsmb_transfer()
405 	for (i = 4; i != 0; i--) {  in imcsmb_transfer()
406 		stat_val = pci_read_config(sc->imcsmb_pci, sc->regs->smb_stat,  in imcsmb_transfer()
415 		device_printf(sc->dev,  in imcsmb_transfer()
422 	pci_write_config(sc->imcsmb_pci, sc->regs->smb_cmd, cmd_val, 4);  in imcsmb_transfer()
427 	for (i = 35000; i != 0; i -= 10)  in imcsmb_transfer()
430 		stat_val = pci_read_config(sc->imcsmb_pci, sc->regs->smb_stat,  in imcsmb_transfer()
456 	/* It is generally the case that this bit indicates non-ACK, but it  in imcsmb_transfer()
461 		/* While it is not documented, empirically, SPD page-change  in imcsmb_transfer()
475 			 * above, byte-swap.  in imcsmb_transfer()
492 	pci_write_config(sc->imcsmb_pci, sc->regs->smb_cntl, orig_cntl_val, 4);  in imcsmb_transfer()