1 // SPDX-License-Identifier: GPL-2.0-or-later
92 #define ST_SPUA				0x01  /* Strong Pull-up is active */
172 	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),  in ds_send_control_cmd()
175 		dev_err(&dev->udev->dev,  in ds_send_control_cmd()
188 	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),  in ds_send_control_mode()
191 		dev_err(&dev->udev->dev,  in ds_send_control_mode()
204 	err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),  in ds_send_control()
207 		dev_err(&dev->udev->dev,  in ds_send_control()
218 	struct device *dev = &ds_dev->udev->dev;  in ds_dump_status()
222 		ds_dev->ep[EP_STATUS], count, count, buf);  in ds_dump_status()
226 		dev_dbg(dev, "1-wire speed: 0x%02x", buf[1]);  in ds_dump_status()
229 		dev_dbg(dev, "pulldown slew rate control: 0x%02x", buf[4]);  in ds_dump_status()
230 		dev_dbg(dev, "write-1 low time: 0x%02x", buf[5]);  in ds_dump_status()
231 		dev_dbg(dev, "data sample offset/write-0 recovery time: 0x%02x", buf[6]);  in ds_dump_status()
237 		dev_dbg(dev, "1-wire data output buffer status: 0x%02x", buf[12]);  in ds_dump_status()
238 		dev_dbg(dev, "1-wire data input buffer status: 0x%02x", buf[13]);  in ds_dump_status()
276 	err = usb_interrupt_msg(dev->udev,  in ds_recv_status()
277 				usb_rcvintpipe(dev->udev,  in ds_recv_status()
278 					       dev->ep[EP_STATUS]),  in ds_recv_status()
279 				dev->st_buf, sizeof(dev->st_buf),  in ds_recv_status()
282 		dev_err(&dev->udev->dev,  in ds_recv_status()
283 			"Failed to read 1-wire data from 0x%x: err=%d.\n",  in ds_recv_status()
284 			dev->ep[EP_STATUS], err);  in ds_recv_status()
289 		memcpy(st, dev->st_buf, sizeof(*st));  in ds_recv_status()
301 		dev_err(&dev->udev->dev,  in ds_reset_device()
303 	/* Chip strong pullup time was cleared. */  in ds_reset_device()
304 	if (dev->spu_sleep) {  in ds_reset_device()
306 		u8 del = dev->spu_sleep>>4;  in ds_reset_device()
309 			dev_err(&dev->udev->dev,  in ds_reset_device()
328 	err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),  in ds_recv_data()
333 		dev_info(&dev->udev->dev, "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);  in ds_recv_data()
334 		usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));  in ds_recv_data()
336 		/* status might tell us why endpoint is stuck? */  in ds_recv_data()
339 			ds_dump_status(dev, dev->st_buf, recv_len);  in ds_recv_data()
362 …err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, …  in ds_send_data()
364 		dev_err(&dev->udev->dev, "Failed to write 1-wire data to ep0x%x: "  in ds_send_data()
365 			"err=%d.\n", dev->ep[EP_DATA_OUT], err);  in ds_send_data()
432 		st->status = 0;  in ds_wait_status()
437 			printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);  in ds_wait_status()
439 				printk("%02x ", dev->st_buf[i]);  in ds_wait_status()
443 	} while (!(st->status & ST_IDLE) && !(err < 0) && ++count < 100);  in ds_wait_status()
445 	if (err >= 16 && st->status & ST_EPOF) {  in ds_wait_status()
446 		dev_info(&dev->udev->dev, "Resetting device after ST_EPOF.\n");  in ds_wait_status()
457 		ds_dump_status(dev, dev->st_buf, err);  in ds_wait_status()
464 		return -1;  in ds_wait_status()
495 		return -EINVAL;
518 	dev->spu_bit = delay ? COMM_SPU : 0;  in ds_set_pullup()
519 	/* If delay is zero, it has already been disabled, if the time is  in ds_set_pullup()
524 	if (delay == 0 || ms == dev->spu_sleep)  in ds_set_pullup()
531 	dev->spu_sleep = ms;  in ds_set_pullup()
562 	 * produce one time slot, a down followed by an up with COMM_D
581 	err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | dev->spu_bit, byte);  in ds_write_byte()
585 	if (dev->spu_bit)  in ds_write_byte()
586 		msleep(dev->spu_sleep);  in ds_write_byte()
592 	err = ds_recv_data(dev, &dev->byte_buf, 1);  in ds_write_byte()
596 	return !(byte == dev->byte_buf);  in ds_write_byte()
623 		return -E2BIG;  in ds_read_block()
652 	err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | dev->spu_bit, len);  in ds_write_block()
656 	if (dev->spu_bit)  in ds_write_block()
657 		msleep(dev->spu_sleep);  in ds_write_block()
676 	 * more, search_limit IDs will be returned followed by a non-zero  in ds9490r_search()
688 	 * discovering 8 devices (1 bulk transfer and 1/2 FIFO size) at a time.  in ds9490r_search()
705 	found_ids = kmalloc_array(master->max_slave_count, sizeof(u64), GFP_KERNEL);  in ds9490r_search()
711 	mutex_lock(&master->bus_mutex);  in ds9490r_search()
714 	if (ds_send_data(dev, (u8 *)&master->search_id, 8) < 0)  in ds9490r_search()
716 	master->search_id = 0;  in ds9490r_search()
720 	search_limit = master->max_slave_count;  in ds9490r_search()
753 					master->search_id = buf[i];  in ds9490r_search()
759 		if (test_bit(W1_ABORT_SEARCH, &master->flags))  in ds9490r_search()
765 		master->search_id = 0;  in ds9490r_search()
766 	} else if (!test_bit(W1_WARN_MAX_COUNT, &master->flags)) {  in ds9490r_search()
775 		dev_info(&dev->udev->dev, "%s: max_slave_count %d reached, "  in ds9490r_search()
777 			master->max_slave_count);  in ds9490r_search()
778 		set_bit(W1_WARN_MAX_COUNT, &master->flags);  in ds9490r_search()
782 	mutex_unlock(&master->bus_mutex);  in ds9490r_search()
845 	if (ds_touch_bit(dev, bit, &dev->byte_buf))  in ds9490r_touch_bit()
848 	return dev->byte_buf;  in ds9490r_touch_bit()
864 	err = ds_touch_bit(dev, 1, &dev->byte_buf);
868 	return dev->byte_buf & 1;
884 	err = ds_read_byte(dev, &dev->byte_buf);  in ds9490r_read_byte()
888 	return dev->byte_buf;  in ds9490r_read_byte()
954 	memset(&dev->master, 0, sizeof(struct w1_bus_master));  in ds_w1_init()
968 	dev->master.data	= dev;  in ds_w1_init()
969 	dev->master.touch_bit	= &ds9490r_touch_bit;  in ds_w1_init()
973 	 * individual time slot at the lowest level.  The requirement from  in ds_w1_init()
974 	 * pulling the bus state down to reading the state is 15us, something  in ds_w1_init()
976 	dev->master.read_bit	= &ds9490r_read_bit;  in ds_w1_init()
977 	dev->master.write_bit	= &ds9490r_write_bit;  in ds_w1_init()
979 	dev->master.read_byte	= &ds9490r_read_byte;  in ds_w1_init()
980 	dev->master.write_byte	= &ds9490r_write_byte;  in ds_w1_init()
981 	dev->master.read_block	= &ds9490r_read_block;  in ds_w1_init()
982 	dev->master.write_block	= &ds9490r_write_block;  in ds_w1_init()
983 	dev->master.reset_bus	= &ds9490r_reset;  in ds_w1_init()
984 	dev->master.set_pullup	= &ds9490r_set_pullup;  in ds_w1_init()
985 	dev->master.search	= &ds9490r_search;  in ds_w1_init()
987 	return w1_add_master_device(&dev->master);  in ds_w1_init()
992 	w1_remove_master_device(&dev->master);  in ds_w1_fini()
1006 		return -ENOMEM;  in ds_probe()
1008 	dev->udev = usb_get_dev(udev);  in ds_probe()
1009 	if (!dev->udev) {  in ds_probe()
1010 		err = -ENOMEM;  in ds_probe()
1013 	memset(dev->ep, 0, sizeof(dev->ep));  in ds_probe()
1017 	err = usb_reset_configuration(dev->udev);  in ds_probe()
1019 		dev_err(&dev->udev->dev,  in ds_probe()
1026 	err = usb_set_interface(dev->udev,  in ds_probe()
1027 		intf->cur_altsetting->desc.bInterfaceNumber, alt);  in ds_probe()
1029 		dev_err(&dev->udev->dev, "Failed to set alternative setting %d "  in ds_probe()
1031 			intf->cur_altsetting->desc.bInterfaceNumber, err);  in ds_probe()
1035 	iface_desc = intf->cur_altsetting;  in ds_probe()
1036 	if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {  in ds_probe()
1037 		dev_err(&dev->udev->dev, "Num endpoints=%d. It is not DS9490R.\n",  in ds_probe()
1038 			iface_desc->desc.bNumEndpoints);  in ds_probe()
1039 		err = -EINVAL;  in ds_probe()
1045 	 * so we will fill only 1-3 endpoints entry.  in ds_probe()
1047 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {  in ds_probe()
1048 		endpoint = &iface_desc->endpoint[i].desc;  in ds_probe()
1050 		dev->ep[i+1] = endpoint->bEndpointAddress;  in ds_probe()
1053 			i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize),  in ds_probe()
1054 			(endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT",  in ds_probe()
1055 			endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);  in ds_probe()
1064 	list_add_tail(&dev->ds_entry, &ds_devices);  in ds_probe()
1071 	usb_put_dev(dev->udev);  in ds_probe()
1086 	list_del(&dev->ds_entry);  in ds_disconnect()
1093 	usb_put_dev(dev->udev);  in ds_disconnect()
1112 MODULE_DESCRIPTION("DS2490 USB <-> W1 bus master driver (DS9490*)");