^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) * PL-2301/2302 USB host-to-host link cables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2000-2005 by David Brownell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) // #define DEBUG // error path messages, extra info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) // #define VERBOSE // more; success messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/ethtool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mii.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/usb/usbnet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Prolific PL-2301/PL-2302 driver ... http://www.prolific.com.tw/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * The protocol and handshaking used here should be bug-compatible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * with the Linux 2.2 "plusb" driver, by Deti Fliegl.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * HEADS UP: this handshaking isn't all that robust. This driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * gets confused easily if you unplug one end of the cable then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * try to connect it again; you'll need to restart both ends. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * "naplink" software (used by some PlayStation/2 developers) does
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * the handshaking much better! Also, sometimes this hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * seems to get wedged under load. Prolific docs are weak, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * don't identify differences between PL2301 and PL2302, much less
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * anything to explain the different PL2302 versions observed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * NOTE: pl2501 has several modes, including pl2301 and pl2302
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * compatibility. Some docs suggest the difference between 2301
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * and 2302 is only to make MS-Windows use a different driver...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * pl25a1 glue based on patch from Tony Gibbs. Prolific "docs" on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * this chip are as usual incomplete about what control messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * are supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * Bits 0-4 can be used for software handshaking; they're set from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * one end, cleared from the other, "read" with the interrupt byte.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define PL_S_EN (1<<7) /* (feature only) suspend enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* reserved bit -- rx ready (6) ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define PL_TX_READY (1<<5) /* (interrupt only) transmit ready */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define PL_RESET_OUT (1<<4) /* reset output pipe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define PL_RESET_IN (1<<3) /* reset input pipe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define PL_TX_C (1<<2) /* transmission complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define PL_TX_REQ (1<<1) /* transmission received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define PL_PEER_E (1<<0) /* peer exists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) pl_vendor_req(struct usbnet *dev, u8 req, u8 val, u8 index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return usbnet_read_cmd(dev, req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) USB_DIR_IN | USB_TYPE_VENDOR |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) USB_RECIP_DEVICE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) val, index, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) pl_clear_QuickLink_features(struct usbnet *dev, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return pl_vendor_req(dev, 1, (u8) val, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) pl_set_QuickLink_features(struct usbnet *dev, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return pl_vendor_req(dev, 3, (u8) val, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int pl_reset(struct usbnet *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* some units seem to need this reset, others reject it utterly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * FIXME be more like "naplink" or windows drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) status = pl_set_QuickLink_features(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (status != 0 && netif_msg_probe(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) netif_dbg(dev, link, dev->net, "pl_reset --> %d\n", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static const struct driver_info prolific_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .description = "Prolific PL-2301/PL-2302/PL-25A1/PL-27A1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* some PL-2302 versions seem to fail usb_set_interface() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .reset = pl_reset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*-------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * Proilific's name won't normally be on the cables, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * may not be on the device.
^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 const struct usb_device_id products [] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /* full speed cables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) USB_DEVICE(0x067b, 0x0000), // PL-2301
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .driver_info = (unsigned long) &prolific_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) USB_DEVICE(0x067b, 0x0001), // PL-2302
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .driver_info = (unsigned long) &prolific_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* high speed cables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) USB_DEVICE(0x067b, 0x25a1), /* PL-25A1, no eeprom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .driver_info = (unsigned long) &prolific_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) USB_DEVICE(0x050d, 0x258a), /* Belkin F5U258/F5U279 (PL-25A1) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .driver_info = (unsigned long) &prolific_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) USB_DEVICE(0x3923, 0x7825), /* National Instruments USB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * Host-to-Host Cable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .driver_info = (unsigned long) &prolific_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /* super speed cables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) USB_DEVICE(0x067b, 0x27a1), /* PL-27A1, no eeprom
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * also: goobay Active USB 3.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * Data Link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * Unitek Y-3501
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .driver_info = (unsigned long) &prolific_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) { }, // END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) MODULE_DEVICE_TABLE(usb, products);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static struct usb_driver plusb_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .name = "plusb",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .id_table = products,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) .probe = usbnet_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .disconnect = usbnet_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .suspend = usbnet_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .resume = usbnet_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .disable_hub_initiated_lpm = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) module_usb_driver(plusb_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_AUTHOR("David Brownell");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) MODULE_DESCRIPTION("Prolific PL-2301/2302/25A1/27A1 USB Host to Host Link Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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