^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Nano River Technologies viperboard driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This is the core driver for the viperboard. There are cell drivers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * available for I2C, ADC and both GPIOs. SPI is not yet supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * The drivers do not support all features the board exposes. See user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * manual of the viperboard.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * (C) 2012 by Lemonage GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Author: Lars Poeschel <poeschel@lemonage.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/mfd/viperboard.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static const struct usb_device_id vprbrd_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) { USB_DEVICE(0x2058, 0x1005) }, /* Nano River Technologies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) { } /* Terminating entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) MODULE_DEVICE_TABLE(usb, vprbrd_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static const struct mfd_cell vprbrd_devs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .name = "viperboard-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .name = "viperboard-i2c",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .name = "viperboard-adc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int vprbrd_probe(struct usb_interface *interface,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) const struct usb_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct vprbrd *vb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) u16 version = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int pipe, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* allocate memory for our device state and initialize it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) vb = kzalloc(sizeof(*vb), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!vb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) mutex_init(&vb->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) vb->usb_dev = usb_get_dev(interface_to_usbdev(interface));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* save our data pointer in this interface device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) usb_set_intfdata(interface, vb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) dev_set_drvdata(&vb->pdev.dev, vb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* get version information, major first, minor then */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) pipe = usb_rcvctrlpipe(vb->usb_dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MAJOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) VPRBRD_USB_TIMEOUT_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (ret == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) version = vb->buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MINOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) VPRBRD_USB_TIMEOUT_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (ret == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) version <<= 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) version = version | vb->buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) dev_info(&interface->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) "version %x.%02x found at bus %03d address %03d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) version >> 8, version & 0xff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) vb->usb_dev->bus->busnum, vb->usb_dev->devnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = mfd_add_hotplug_devices(&interface->dev, vprbrd_devs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ARRAY_SIZE(vprbrd_devs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (ret != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_err(&interface->dev, "Failed to add mfd devices to core.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (vb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) usb_put_dev(vb->usb_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) kfree(vb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static void vprbrd_disconnect(struct usb_interface *interface)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct vprbrd *vb = usb_get_intfdata(interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) mfd_remove_devices(&interface->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) usb_set_intfdata(interface, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) usb_put_dev(vb->usb_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) kfree(vb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) dev_dbg(&interface->dev, "disconnected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static struct usb_driver vprbrd_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .name = "viperboard",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .probe = vprbrd_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .disconnect = vprbrd_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .id_table = vprbrd_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) module_usb_driver(vprbrd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) MODULE_DESCRIPTION("Nano River Technologies viperboard mfd core driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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