1 // SPDX-License-Identifier: GPL-2.0-or-later
92 #define ST_SPUA				0x01  /* Strong Pull-up is active */
131 	/* Strong PullUp
135 	/* spu_bit contains COMM_SPU or 0 depending on if the strong pullup
172 	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),  in ds_send_control_cmd()
187 	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),  in ds_send_control_mode()
202 	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),  in ds_send_control()
222 	pr_info("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);  in ds_dump_status()
229 		ds_print_msg(buf, "1-wire speed", 1);  in ds_dump_status()
230 		ds_print_msg(buf, "strong pullup duration", 2);  in ds_dump_status()
233 		ds_print_msg(buf, "write-1 low time", 5);  in ds_dump_status()
234 		ds_print_msg(buf, "data sample offset/write-0 recovery time",  in ds_dump_status()
241 		ds_print_msg(buf, "1-wire data output buffer status", 12);  in ds_dump_status()
242 		ds_print_msg(buf, "1-wire data input buffer status", 13);  in ds_dump_status()
280 	err = usb_interrupt_msg(dev->udev,  in ds_recv_status()
281 				usb_rcvintpipe(dev->udev,  in ds_recv_status()
282 					       dev->ep[EP_STATUS]),  in ds_recv_status()
283 				dev->st_buf, sizeof(dev->st_buf),  in ds_recv_status()
286 		pr_err("Failed to read 1-wire data from 0x%x: err=%d.\n",  in ds_recv_status()
287 		       dev->ep[EP_STATUS], err);  in ds_recv_status()
292 		ds_dump_status(dev, dev->st_buf, count);  in ds_recv_status()
295 		memcpy(st, dev->st_buf, sizeof(*st));  in ds_recv_status()
303 	/* Always allow strong pullup which allow individual writes to use  in ds_reset_device()
304 	 * the strong pullup.  in ds_reset_device()
307 		pr_err("ds_reset_device: Error allowing strong pullup\n");  in ds_reset_device()
308 	/* Chip strong pullup time was cleared. */  in ds_reset_device()
309 	if (dev->spu_sleep) {  in ds_reset_device()
311 		u8 del = dev->spu_sleep>>4;  in ds_reset_device()
331 	err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),  in ds_recv_data()
334 		pr_info("Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);  in ds_recv_data()
335 		usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));  in ds_recv_data()
358 …err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, …  in ds_send_data()
360 		pr_err("Failed to write 1-wire data to ep0x%x: "  in ds_send_data()
361 			"err=%d.\n", dev->ep[EP_DATA_OUT], err);  in ds_send_data()
428 		st->status = 0;  in ds_wait_status()
433 			printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);  in ds_wait_status()
435 				printk("%02x ", dev->st_buf[i]);  in ds_wait_status()
439 	} while (!(st->status & ST_IDLE) && !(err < 0) && ++count < 100);  in ds_wait_status()
441 	if (err >= 16 && st->status & ST_EPOF) {  in ds_wait_status()
453 		ds_dump_status(dev, dev->st_buf, err);  in ds_wait_status()
460 		return -1;  in ds_wait_status()
491 		return -EINVAL;
514 	dev->spu_bit = delay ? COMM_SPU : 0;  in ds_set_pullup()
520 	if (delay == 0 || ms == dev->spu_sleep)  in ds_set_pullup()
527 	dev->spu_sleep = ms;  in ds_set_pullup()
558 	 * produce one time slot, a down followed by an up with COMM_D
577 	err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | dev->spu_bit, byte);  in ds_write_byte()
581 	if (dev->spu_bit)  in ds_write_byte()
582 		msleep(dev->spu_sleep);  in ds_write_byte()
588 	err = ds_recv_data(dev, &dev->byte_buf, 1);  in ds_write_byte()
592 	return !(byte == dev->byte_buf);  in ds_write_byte()
619 		return -E2BIG;  in ds_read_block()
648 	err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | dev->spu_bit, len);  in ds_write_block()
652 	if (dev->spu_bit)  in ds_write_block()
653 		msleep(dev->spu_sleep);  in ds_write_block()
672 	 * more, search_limit IDs will be returned followed by a non-zero  in ds9490r_search()
697 	mutex_lock(&master->bus_mutex);  in ds9490r_search()
700 	if (ds_send_data(dev, (u8 *)&master->search_id, 8) < 0)  in ds9490r_search()
702 	master->search_id = 0;  in ds9490r_search()
706 	search_limit = master->max_slave_count;  in ds9490r_search()
738 					master->search_id = buf[i];  in ds9490r_search()
742 		if (test_bit(W1_ABORT_SEARCH, &master->flags))  in ds9490r_search()
748 		master->search_id = 0;  in ds9490r_search()
749 	} else if (!test_bit(W1_WARN_MAX_COUNT, &master->flags)) {  in ds9490r_search()
757 		dev_info(&dev->udev->dev, "%s: max_slave_count %d reached, "  in ds9490r_search()
759 			master->max_slave_count);  in ds9490r_search()
760 		set_bit(W1_WARN_MAX_COUNT, &master->flags);  in ds9490r_search()
763 	mutex_unlock(&master->bus_mutex);  in ds9490r_search()
822 	if (ds_touch_bit(dev, bit, &dev->byte_buf))  in ds9490r_touch_bit()
825 	return dev->byte_buf;  in ds9490r_touch_bit()
841 	err = ds_touch_bit(dev, 1, &dev->byte_buf);
845 	return dev->byte_buf & 1;
861 	err = ds_read_byte(dev, &dev->byte_buf);  in ds9490r_read_byte()
865 	return dev->byte_buf;  in ds9490r_read_byte()
931 	memset(&dev->master, 0, sizeof(struct w1_bus_master));  in ds_w1_init()
945 	dev->master.data	= dev;  in ds_w1_init()
946 	dev->master.touch_bit	= &ds9490r_touch_bit;  in ds_w1_init()
953 	dev->master.read_bit	= &ds9490r_read_bit;  in ds_w1_init()
954 	dev->master.write_bit	= &ds9490r_write_bit;  in ds_w1_init()
956 	dev->master.read_byte	= &ds9490r_read_byte;  in ds_w1_init()
957 	dev->master.write_byte	= &ds9490r_write_byte;  in ds_w1_init()
958 	dev->master.read_block	= &ds9490r_read_block;  in ds_w1_init()
959 	dev->master.write_block	= &ds9490r_write_block;  in ds_w1_init()
960 	dev->master.reset_bus	= &ds9490r_reset;  in ds_w1_init()
961 	dev->master.set_pullup	= &ds9490r_set_pullup;  in ds_w1_init()
962 	dev->master.search	= &ds9490r_search;  in ds_w1_init()
964 	return w1_add_master_device(&dev->master);  in ds_w1_init()
969 	w1_remove_master_device(&dev->master);  in ds_w1_fini()
984 		return -ENOMEM;  in ds_probe()
986 	dev->udev = usb_get_dev(udev);  in ds_probe()
987 	if (!dev->udev) {  in ds_probe()
988 		err = -ENOMEM;  in ds_probe()
991 	memset(dev->ep, 0, sizeof(dev->ep));  in ds_probe()
995 	err = usb_reset_configuration(dev->udev);  in ds_probe()
997 		dev_err(&dev->udev->dev,  in ds_probe()
1004 	err = usb_set_interface(dev->udev,  in ds_probe()
1005 		intf->cur_altsetting->desc.bInterfaceNumber, alt);  in ds_probe()
1007 		dev_err(&dev->udev->dev, "Failed to set alternative setting %d "  in ds_probe()
1009 			intf->cur_altsetting->desc.bInterfaceNumber, err);  in ds_probe()
1013 	iface_desc = intf->cur_altsetting;  in ds_probe()
1014 	if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {  in ds_probe()
1016 			iface_desc->desc.bNumEndpoints);  in ds_probe()
1017 		err = -EINVAL;  in ds_probe()
1023 	 * so we will fill only 1-3 endpoints entry.  in ds_probe()
1025 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {  in ds_probe()
1026 		endpoint = &iface_desc->endpoint[i].desc;  in ds_probe()
1028 		dev->ep[i+1] = endpoint->bEndpointAddress;  in ds_probe()
1031 			i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize),  in ds_probe()
1032 			(endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT",  in ds_probe()
1033 			endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);  in ds_probe()
1042 	list_add_tail(&dev->ds_entry, &ds_devices);  in ds_probe()
1049 	usb_put_dev(dev->udev);  in ds_probe()
1064 	list_del(&dev->ds_entry);  in ds_disconnect()
1071 	usb_put_dev(dev->udev);  in ds_disconnect()
1090 MODULE_DESCRIPTION("DS2490 USB <-> W1 bus master driver (DS9490*)");