^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * dbgp.c -- EHCI Debug Port device gadget
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010 Stephane Duverger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Released under the GPLv2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /* verbose messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/usb/ch9.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/usb/gadget.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "u_serial.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define DRIVER_VENDOR_ID 0x0525 /* NetChip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define DRIVER_PRODUCT_ID 0xc0de /* undefined */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define USB_DEBUG_MAX_PACKET_SIZE 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define DBGP_REQ_EP0_LEN 128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define DBGP_REQ_LEN 512
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static struct dbgp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct usb_gadget *gadget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct usb_request *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct usb_ep *i_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct usb_ep *o_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #ifdef CONFIG_USB_G_DBGP_SERIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct gserial *serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) } dbgp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static struct usb_device_descriptor device_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .bLength = sizeof device_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .bDescriptorType = USB_DT_DEVICE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .bcdUSB = cpu_to_le16(0x0200),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .bDeviceClass = USB_CLASS_VENDOR_SPEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .idVendor = cpu_to_le16(DRIVER_VENDOR_ID),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .idProduct = cpu_to_le16(DRIVER_PRODUCT_ID),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .bNumConfigurations = 1,
^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) static struct usb_debug_descriptor dbg_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .bLength = sizeof dbg_desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .bDescriptorType = USB_DT_DEBUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static struct usb_endpoint_descriptor i_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .bLength = USB_DT_ENDPOINT_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .bDescriptorType = USB_DT_ENDPOINT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .bmAttributes = USB_ENDPOINT_XFER_BULK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .bEndpointAddress = USB_DIR_IN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static struct usb_endpoint_descriptor o_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) .bLength = USB_DT_ENDPOINT_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .bDescriptorType = USB_DT_ENDPOINT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .bmAttributes = USB_ENDPOINT_XFER_BULK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .bEndpointAddress = USB_DIR_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #ifdef CONFIG_USB_G_DBGP_PRINTK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int dbgp_consume(char *buf, unsigned len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (!len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) c = buf[len-1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (c != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) buf[len-1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) printk(KERN_NOTICE "%s%c", buf, c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static void __disable_ep(struct usb_ep *ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) usb_ep_disable(ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static void dbgp_disable_ep(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) __disable_ep(dbgp.i_ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) __disable_ep(dbgp.o_ep);
^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 void dbgp_complete(struct usb_ep *ep, struct usb_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int stp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int status = req->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (ep == dbgp.i_ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) stp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) goto fail;
^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) if (status != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) stp = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto release_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) dbgp_consume(req->buf, req->actual);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) req->length = DBGP_REQ_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) err = usb_ep_queue(ep, req, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) stp = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) goto release_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) release_req:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) kfree(req->buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) usb_ep_free_request(dbgp.o_ep, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dbgp_disable_ep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) dev_dbg(&dbgp.gadget->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) "complete: failure (%d:%d) ==> %d\n", stp, err, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int dbgp_enable_ep_req(struct usb_ep *ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) int err, stp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct usb_request *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) req = usb_ep_alloc_request(ep, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!req) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) stp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) goto fail_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) req->buf = kzalloc(DBGP_REQ_LEN, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (!req->buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) stp = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) goto fail_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) req->complete = dbgp_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) req->length = DBGP_REQ_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) err = usb_ep_queue(ep, req, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) stp = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) goto fail_3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) fail_3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) kfree(req->buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) fail_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) usb_ep_free_request(dbgp.o_ep, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) fail_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) dev_dbg(&dbgp.gadget->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) "enable ep req: failure (%d:%d)\n", stp, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int __enable_ep(struct usb_ep *ep, struct usb_endpoint_descriptor *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) ep->desc = desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) err = usb_ep_enable(ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static int dbgp_enable_ep(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int err, stp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) err = __enable_ep(dbgp.i_ep, &i_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) stp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) goto fail_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) err = __enable_ep(dbgp.o_ep, &o_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) stp = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto fail_2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) err = dbgp_enable_ep_req(dbgp.o_ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) stp = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) goto fail_3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) fail_3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) __disable_ep(dbgp.o_ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) fail_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) __disable_ep(dbgp.i_ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) fail_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) dev_dbg(&dbgp.gadget->dev, "enable ep: failure (%d:%d)\n", stp, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static void dbgp_disconnect(struct usb_gadget *gadget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #ifdef CONFIG_USB_G_DBGP_PRINTK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) dbgp_disable_ep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) gserial_disconnect(dbgp.serial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static void dbgp_unbind(struct usb_gadget *gadget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) #ifdef CONFIG_USB_G_DBGP_SERIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) kfree(dbgp.serial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) dbgp.serial = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (dbgp.req) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) kfree(dbgp.req->buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) usb_ep_free_request(gadget->ep0, dbgp.req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) dbgp.req = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) #ifdef CONFIG_USB_G_DBGP_SERIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static unsigned char tty_line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static int dbgp_configure_endpoints(struct usb_gadget *gadget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) int stp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) usb_ep_autoconfig_reset(gadget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) dbgp.i_ep = usb_ep_autoconfig(gadget, &i_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (!dbgp.i_ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) stp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) goto fail_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) i_desc.wMaxPacketSize =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) cpu_to_le16(USB_DEBUG_MAX_PACKET_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) dbgp.o_ep = usb_ep_autoconfig(gadget, &o_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (!dbgp.o_ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) stp = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) goto fail_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) o_desc.wMaxPacketSize =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) cpu_to_le16(USB_DEBUG_MAX_PACKET_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) dbg_desc.bDebugInEndpoint = i_desc.bEndpointAddress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) dbg_desc.bDebugOutEndpoint = o_desc.bEndpointAddress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) #ifdef CONFIG_USB_G_DBGP_SERIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) dbgp.serial->in = dbgp.i_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) dbgp.serial->out = dbgp.o_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) dbgp.serial->in->desc = &i_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) dbgp.serial->out->desc = &o_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) fail_1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) dev_dbg(&dbgp.gadget->dev, "ep config: failure (%d)\n", stp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int dbgp_bind(struct usb_gadget *gadget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct usb_gadget_driver *driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int err, stp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) dbgp.gadget = gadget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dbgp.req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (!dbgp.req) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) stp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) dbgp.req->buf = kmalloc(DBGP_REQ_EP0_LEN, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (!dbgp.req->buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) stp = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) dbgp.req->length = DBGP_REQ_EP0_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) #ifdef CONFIG_USB_G_DBGP_SERIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) dbgp.serial = kzalloc(sizeof(struct gserial), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!dbgp.serial) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) stp = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (gserial_alloc_line(&tty_line)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) stp = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) err = dbgp_configure_endpoints(gadget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) stp = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) dev_dbg(&dbgp.gadget->dev, "bind: success\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) dev_dbg(&gadget->dev, "bind: failure (%d:%d)\n", stp, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) dbgp_unbind(gadget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) static void dbgp_setup_complete(struct usb_ep *ep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) struct usb_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) dev_dbg(&dbgp.gadget->dev, "setup complete: %d, %d/%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) req->status, req->actual, req->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static int dbgp_setup(struct usb_gadget *gadget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) const struct usb_ctrlrequest *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct usb_request *req = dbgp.req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) u8 request = ctrl->bRequest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) u16 value = le16_to_cpu(ctrl->wValue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) u16 length = le16_to_cpu(ctrl->wLength);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) int err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) void *data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) u16 len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (length > DBGP_REQ_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) if (ctrl->bRequestType & USB_DIR_IN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /* Cast away the const, we are going to overwrite on purpose. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) __le16 *temp = (__le16 *)&ctrl->wLength;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) *temp = cpu_to_le16(DBGP_REQ_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) length = DBGP_REQ_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (request == USB_REQ_GET_DESCRIPTOR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) switch (value>>8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) case USB_DT_DEVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) dev_dbg(&dbgp.gadget->dev, "setup: desc device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) len = sizeof device_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) data = &device_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) case USB_DT_DEBUG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) dev_dbg(&dbgp.gadget->dev, "setup: desc debug\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) len = sizeof dbg_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) data = &dbg_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) } else if (request == USB_REQ_SET_FEATURE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) value == USB_DEVICE_DEBUG_MODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) dev_dbg(&dbgp.gadget->dev, "setup: feat debug\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #ifdef CONFIG_USB_G_DBGP_PRINTK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) err = dbgp_enable_ep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) err = dbgp_configure_endpoints(gadget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) err = gserial_connect(dbgp.serial, tty_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) req->length = min(length, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) req->zero = len < req->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (data && req->length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) memcpy(req->buf, data, req->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) req->complete = dbgp_setup_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) dev_dbg(&dbgp.gadget->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) "setup: failure req %x v %x\n", request, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static struct usb_gadget_driver dbgp_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) .function = "dbgp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) .max_speed = USB_SPEED_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) .bind = dbgp_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) .unbind = dbgp_unbind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) .setup = dbgp_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) .reset = dbgp_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) .disconnect = dbgp_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) .name = "dbgp"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static int __init dbgp_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) return usb_gadget_probe_driver(&dbgp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) static void __exit dbgp_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) usb_gadget_unregister_driver(&dbgp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) #ifdef CONFIG_USB_G_DBGP_SERIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) gserial_free_line(tty_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) MODULE_AUTHOR("Stephane Duverger");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) module_init(dbgp_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) module_exit(dbgp_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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