1 // SPDX-License-Identifier: GPL-2.0+
24 /* global chip registers */
132 	unsigned long gpios;  member
145 		return -EBUSY;  in winbond_sio_enter()
149 	 * in order for chip to enter the "Extended Function Mode"  in winbond_sio_enter()
206  * struct winbond_gpio_port_conflict - possibly conflicting device information
209  *		is located (or WB_SIO_DEV_NONE - don't select any
226  * struct winbond_gpio_info - information about a particular GPIO port (device)
229  * @enablereg:		port enable bit register number
230  * @enablebit:		index of a port enable bit
232  * @outputppbit:	index of a push-pull output driver mode bit
357 	for_each_set_bit(i, &params.gpios, BITS_PER_LONG) {  in winbond_gpio_get_info()
361 		*gpio_num -= 8;  in winbond_gpio_get_info()
396 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_get()
398 	val = winbond_sio_reg_btest(*base, info->datareg, offset);  in winbond_gpio_get()
399 	if (winbond_sio_reg_btest(*base, info->invreg, offset))  in winbond_gpio_get()
414 		return -EACCES;  in winbond_gpio_direction_in()
420 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_direction_in()
422 	winbond_sio_reg_bset(*base, info->ioreg, offset);  in winbond_gpio_direction_in()
438 		return -EACCES;  in winbond_gpio_direction_out()
444 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_direction_out()
446 	winbond_sio_reg_bclear(*base, info->ioreg, offset);  in winbond_gpio_direction_out()
448 	if (winbond_sio_reg_btest(*base, info->invreg, offset))  in winbond_gpio_direction_out()
452 		winbond_sio_reg_bset(*base, info->datareg, offset);  in winbond_gpio_direction_out()
454 		winbond_sio_reg_bclear(*base, info->datareg, offset);  in winbond_gpio_direction_out()
473 	winbond_sio_select_logical(*base, info->dev);  in winbond_gpio_set()
475 	if (winbond_sio_reg_btest(*base, info->invreg, offset))  in winbond_gpio_set()
479 		winbond_sio_reg_bset(*base, info->datareg, offset);  in winbond_gpio_set()
481 		winbond_sio_reg_bclear(*base, info->datareg, offset);  in winbond_gpio_set()
487 	.base			= -1,
525 	const struct winbond_gpio_port_conflict *conflict = &info->conflict;  in winbond_gpio_configure_port()
528 	if (conflict->name != NULL) {  in winbond_gpio_configure_port()
529 		if (conflict->dev != WB_SIO_DEV_NONE)  in winbond_gpio_configure_port()
530 			winbond_sio_select_logical(base, conflict->dev);  in winbond_gpio_configure_port()
532 		if (winbond_sio_reg_btest(base, conflict->testreg,  in winbond_gpio_configure_port()
533 					  conflict->testbit)) {  in winbond_gpio_configure_port()
534 			if (conflict->warnonly)  in winbond_gpio_configure_port()
536 					idx + 1, conflict->name);  in winbond_gpio_configure_port()
539 					idx + 1, conflict->name);  in winbond_gpio_configure_port()
551 	winbond_sio_select_logical(base, info->dev);  in winbond_gpio_configure_port()
553 	winbond_sio_reg_bset(base, info->enablereg, info->enablebit);  in winbond_gpio_configure_port()
556 		winbond_sio_reg_bset(base, info->outputreg,  in winbond_gpio_configure_port()
557 				     info->outputppbit);  in winbond_gpio_configure_port()
559 		winbond_sio_reg_bclear(base, info->outputreg,  in winbond_gpio_configure_port()
560 				       info->outputppbit);  in winbond_gpio_configure_port()
563 			  winbond_sio_reg_btest(base, info->outputreg,  in winbond_gpio_configure_port()
564 						info->outputppbit) ?  in winbond_gpio_configure_port()
565 			  "push-pull" :  in winbond_gpio_configure_port()
575 	for_each_set_bit(i, &params.gpios, BITS_PER_LONG)  in winbond_gpio_configure()
577 			__clear_bit(i, &params.gpios);  in winbond_gpio_configure()
579 	if (!params.gpios) {  in winbond_gpio_configure()
580 		pr_err("please use 'gpios' module parameter to select some active GPIO ports to enable\n");  in winbond_gpio_configure()
581 		return -EINVAL;  in winbond_gpio_configure()
590 	unsigned int chip;  in winbond_gpio_check_chip()  local
596 	chip = winbond_sio_reg_read(base, WB_SIO_REG_CHIP_MSB) << 8;  in winbond_gpio_check_chip()
597 	chip |= winbond_sio_reg_read(base, WB_SIO_REG_CHIP_LSB);  in winbond_gpio_check_chip()
599 	pr_notice("chip ID at %lx is %.4x\n", base, chip);  in winbond_gpio_check_chip()
601 	if ((chip & WB_SIO_CHIP_ID_W83627UHG_MASK) !=  in winbond_gpio_check_chip()
603 		pr_err("not an our chip\n");  in winbond_gpio_check_chip()
604 		ret = -ENODEV;  in winbond_gpio_check_chip()
617 	gpios_rem = params.gpios & ~GENMASK(ARRAY_SIZE(winbond_gpio_infos) - 1,  in winbond_gpio_imatch()
622 		params.gpios &= ~gpios_rem;  in winbond_gpio_imatch()
626 		pr_err("some GPIO ports are set both to push-pull and open drain mode at the same time\n");  in winbond_gpio_imatch()
634 	 * if the 'base' module parameter is unset probe two chip default  in winbond_gpio_imatch()
641 	if (ret != -ENODEV && ret != -EBUSY)  in winbond_gpio_imatch()
653 		return -EINVAL;  in winbond_gpio_iprobe()
667 	 * Add 8 gpios for every GPIO port that was enabled in gpios  in winbond_gpio_iprobe()
671 	winbond_gpio_chip.ngpio = hweight_long(params.gpios) * 8;  in winbond_gpio_iprobe()
677 	if (params.gpios & BIT(5))  in winbond_gpio_iprobe()
678 		winbond_gpio_chip.ngpio -= (8 - 5);  in winbond_gpio_iprobe()
697 		 "I/O port base (when unset - probe chip default ones)");
699 /* This parameter sets which GPIO devices (ports) we enable */
700 module_param_named(gpios, params.gpios, ulong, 0444);
701 MODULE_PARM_DESC(gpios,
702 		 "bitmask of GPIO ports to enable (bit 0 - GPIO1, bit 1 - GPIO2, etc.");
706  * It can't be a one bitmask since we need three values per port: push-pull,
707  * open-drain and keep as-is (this is the default).
711 		 "bitmask of GPIO ports to set to push-pull mode (bit 0 - GPIO1, bit 1 - GPIO2, etc.");
715 		 "bitmask of GPIO ports to set to open drain mode (bit 0 - GPIO1, bit 1 - GPIO2, etc.");
725 		 "enable changing value of GPIO2.0 bit (Power LED), default no.");
729 		 "enable changing value of GPIO2.1 bit (BEEP), default no.");