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usb/: added DFU implementation from f386base/fw/boot/ (unported)
This commit is contained in:
Werner Almesberger
parent
0676bef2c1
commit
fb2204ad84
332
atusb/fw/usb/dfu.c
Normal file
332
atusb/fw/usb/dfu.c
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/*
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* boot/dfu.c - DFU protocol engine
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*
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* Written 2008-2010 by Werner Almesberger
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* Copyright 2008-2010 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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/*
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* http://www.usb.org/developers/devclass_docs/DFU_1.1.pdf
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*/
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/*
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* A few, erm, shortcuts:
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*
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* - we don't bother with the app* states since DFU is all this firmware does
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* - after DFU_DNLOAD, we just block until things are written, so we never
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* enter dfuDNLOAD_SYNC or dfuDNBUSY
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* - no dfuMANIFEST_SYNC, dfuMANIFEST, or dfuMANIFEST_WAIT_RESET
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* - to keep our buffers small, we only accept EP0-sized blocks
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*/
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#include <stdint.h>
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#include "regs.h"
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#include "uart.h"
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#include "usb.h"
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#include "dfu.h"
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#include "config.h"
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#ifndef NULL
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#define NULL 0
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#endif
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#define PAYLOAD_END (PAYLOAD_START+PAYLOAD_SIZE)
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const uint8_t device_descriptor[] = {
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18, /* bLength */
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USB_DT_DEVICE, /* bDescriptorType */
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LE(0x100), /* bcdUSB */
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USB_CLASS_PER_INTERFACE,/* bDeviceClass */
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0x00, /* bDeviceSubClass (per interface) */
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0x00, /* bDeviceProtocol (per interface) */
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EP0_SIZE, /* bMaxPacketSize */
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LE(USB_VENDOR), /* idVendor */
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LE(USB_PRODUCT), /* idProduct */
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LE(0x0001), /* bcdDevice */
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0, /* iManufacturer */
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0, /* iProduct */
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0, /* iSerialNumber */
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1 /* bNumConfigurations */
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};
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const uint8_t config_descriptor[] = {
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9, /* bLength */
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USB_DT_CONFIG, /* bDescriptorType */
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LE(9+9), /* wTotalLength */
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1, /* bNumInterfaces */
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1, /* bConfigurationValue (> 0 !) */
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0, /* iConfiguration */
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// USB_ATTR_SELF_POWERED | USB_ATTR_BUS_POWERED,
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USB_ATTR_BUS_POWERED, /* bmAttributes */
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15, /* bMaxPower */
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/* Interface #0 */
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9, /* bLength */
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USB_DT_INTERFACE, /* bDescriptorType */
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0, /* bInterfaceNumber */
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0, /* bAlternateSetting */
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0, /* bNumEndpoints */
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0xfe, /* bInterfaceClass (application specific) */
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0x01, /* bInterfaceSubClass (device fw upgrade) */
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0x02, /* bInterfaceProtocol (DFU mode protocol) */
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0, /* iInterface */
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};
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static const uint8_t functional_descriptor[] = {
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9, /* bLength */
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DFU_DT_FUNCTIONAL, /* bDescriptorType */
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0xf, /* bmAttributes (claim omnipotence :-) */
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LE(0xffff), /* wDetachTimeOut (we're very patient) */
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LE(EP0_SIZE), /* wTransferSize */
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LE(0x101), /* bcdDFUVersion */
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};
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struct dfu dfu = {
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OK,
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LE(1000), 0,
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dfuIDLE,
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0,
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};
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static uint16_t next_block = 0;
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static uint16_t payload;
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static __bit did_download;
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static __xdata uint8_t buf[EP0_SIZE];
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static void flash_erase_page(uint16_t addr)
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{
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FLKEY = 0xa5;
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FLKEY = 0xf1;
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PSCTL |= PSEE;
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PSCTL |= PSWE;
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*(__xdata uint8_t *) addr = 0;
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PSCTL &= ~PSWE;
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PSCTL &= ~PSEE;
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}
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static void flash_write_byte(uint16_t addr, uint8_t value)
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{
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FLKEY = 0xa5;
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FLKEY = 0xf1;
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PSCTL |= PSWE;
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PSCTL &= ~PSEE;
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*(__xdata uint8_t *) addr = value;
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PSCTL &= ~PSWE;
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}
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static void block_write(void *user)
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{
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uint16_t *size = user;
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uint8_t *p;
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for (p = buf; p != buf+*size; p++) {
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if (!(payload & 511))
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flash_erase_page(payload);
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flash_write_byte(payload, *p);
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payload++;
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}
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}
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static __bit block_receive(uint16_t length)
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{
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static uint16_t size;
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if (payload < PAYLOAD_START || payload+length > PAYLOAD_END) {
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dfu.state = dfuERROR;
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dfu.status = errADDRESS;
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return 0;
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}
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if (length > EP0_SIZE) {
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dfu.state = dfuERROR;
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dfu.status = errUNKNOWN;
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return 0;
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}
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size = length;
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usb_recv(&ep0, buf, size, block_write, &size);
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return 1;
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}
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static __bit block_transmit(uint16_t length)
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{
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uint16_t left;
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if (payload < PAYLOAD_START || payload > PAYLOAD_END) {
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dfu.state = dfuERROR;
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dfu.status = errADDRESS;
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return 1;
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}
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if (length > EP0_SIZE) {
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dfu.state = dfuERROR;
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dfu.status = errUNKNOWN;
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return 1;
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}
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left = PAYLOAD_END-payload;
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if (left < length) {
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length = left;
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dfu.state = dfuIDLE;
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}
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usb_send(&ep0, (__code uint8_t *) payload, length, NULL, NULL);
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payload += length;
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return 1;
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}
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static __bit my_setup(struct setup_request *setup) __reentrant
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{
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__bit ok;
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switch (setup->bmRequestType | setup->bRequest << 8) {
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case DFU_TO_DEV(DFU_DETACH):
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debug("DFU_DETACH\n");
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/*
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* The DFU spec says thay this is sent in protocol 1 only.
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* However, dfu-util also sends it to get out of DFU mode,
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* so we just don't make a fuss and ignore it.
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*/
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return 1;
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case DFU_TO_DEV(DFU_DNLOAD):
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debug("DFU_DNLOAD\n");
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if (dfu.state == dfuIDLE) {
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next_block = setup->wValue;
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payload = PAYLOAD_START;
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}
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else if (dfu.state != dfuDNLOAD_IDLE) {
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error("bad state\n");
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return 0;
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}
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if (dfu.state != dfuIDLE && setup->wValue == next_block-1) {
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debug("retransmisson\n");
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return 1;
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}
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if (setup->wValue != next_block) {
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debug("bad block (%d vs. %d)\n",
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setup->wValue, next_block);
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dfu.state = dfuERROR;
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dfu.status = errUNKNOWN;
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return 1;
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}
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if (!setup->wLength) {
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debug("DONE\n");
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dfu.state = dfuIDLE;
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did_download = 1;
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return 1;
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}
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ok = block_receive(setup->wLength);
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next_block++;
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dfu.state = dfuDNLOAD_IDLE;
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return ok;
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case DFU_FROM_DEV(DFU_UPLOAD):
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debug("DFU_UPLOAD\n");
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if (dfu.state == dfuIDLE) {
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next_block = setup->wValue;
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payload = PAYLOAD_START;
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}
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else if (dfu.state != dfuUPLOAD_IDLE)
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return 0;
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if (dfu.state != dfuIDLE && setup->wValue == next_block-1) {
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debug("retransmisson\n");
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/* @@@ try harder */
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dfu.state = dfuERROR;
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dfu.status = errUNKNOWN;
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return 1;
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}
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if (setup->wValue != next_block) {
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debug("bad block (%d vs. %d)\n",
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setup->wValue, next_block);
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dfu.state = dfuERROR;
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dfu.status = errUNKNOWN;
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return 1;
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}
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ok = block_transmit(setup->wLength);
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next_block++;
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dfu.state = dfuUPLOAD_IDLE;
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return ok;
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case DFU_FROM_DEV(DFU_GETSTATUS):
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debug("DFU_GETSTATUS\n");
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usb_send(&ep0, (uint8_t *) &dfu, sizeof(dfu), NULL, NULL);
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return 1;
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case DFU_TO_DEV(DFU_CLRSTATUS):
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debug("DFU_CLRSTATUS\n");
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dfu.state = dfuIDLE;
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dfu.status = OK;
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return 1;
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case DFU_FROM_DEV(DFU_GETSTATE):
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debug("DFU_GETSTATE\n");
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usb_send(&ep0, &dfu.state, 1, NULL, NULL);
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return 1;
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case DFU_TO_DEV(DFU_ABORT):
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debug("DFU_ABORT\n");
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dfu.state = dfuIDLE;
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dfu.status = OK;
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return 1;
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default:
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#ifdef CONFIG_PRINTK
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printk("DFU rt %x, rq%x ?\n",
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setup->bmRequestType, setup->bRequest);
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#else
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/*
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* @@@ SDCC 2.7.0 ends up OR'in setup->bmRequestType with
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* setup->bRequest unshifted if we don't use at least one of
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* them here.
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*/
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{
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static volatile uint8_t foo;
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foo = setup->bRequest;
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}
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#endif
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return 0;
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}
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}
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static __bit my_descr(uint8_t type, uint8_t index, const uint8_t **reply,
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uint8_t *size) __reentrant
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{
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index; /* suppress warning */
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if (type != DFU_DT_FUNCTIONAL)
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return 0;
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*reply = functional_descriptor;
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*size = sizeof(functional_descriptor);
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return 1;
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}
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static void my_reset(void) __reentrant
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{
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/* @@@ not nice -- think about where this should go */
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extern void run_payload(void);
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if (did_download)
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run_payload();
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}
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void dfu_init(void)
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{
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user_setup = my_setup;
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user_get_descriptor = my_descr;
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user_reset = my_reset;
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}
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86
atusb/fw/usb/dfu.h
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86
atusb/fw/usb/dfu.h
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@ -0,0 +1,86 @@
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/*
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* boot/dfu.h - DFU protocol constants and data structures
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*
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* Written 2008 by Werner Almesberger
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* Copyright 2008 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef DFU_H
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#define DFU_H
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#include <stdint.h>
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enum dfu_request {
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DFU_DETACH,
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DFU_DNLOAD,
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DFU_UPLOAD,
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DFU_GETSTATUS,
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DFU_CLRSTATUS,
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DFU_GETSTATE,
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DFU_ABORT,
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};
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enum dfu_status {
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OK,
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errTARGET,
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errFILE,
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errWRITE,
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errERASE,
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errCHECK_ERASED,
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errPROG,
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errVERIFY,
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errADDRESS,
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errNOTDONE,
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errFIRMWARE,
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errVENDOR,
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errUSBR,
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errPOR,
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errUNKNOWN,
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errSTALLEDPKT,
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};
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enum dfu_state {
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appIDLE,
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appDETACH,
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dfuIDLE,
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dfuDNLOAD_SYNC,
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dfuDNBUSY,
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dfuDNLOAD_IDLE,
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dfuMANIFEST_SYNC,
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dfuMANIFEST,
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dfuMANIFEST_WAIT_RESET,
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dfuUPLOAD_IDLE,
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dfuERROR
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};
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#define DFU_DT_FUNCTIONAL 0x21 /* DFU FUNCTIONAL descriptor type */
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#define DFU_TO_DEV(req) (0x21 | (req) << 8)
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#define DFU_FROM_DEV(req) (0xa1 | (req) << 8)
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struct dfu {
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uint8_t status; /* bStatus */
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uint8_t toL, toM, toH; /* bwPollTimeout */
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uint8_t state; /* bState */
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uint8_t iString;
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};
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extern struct dfu dfu;
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void dfu_init(void);
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#endif /* !DFU_H */
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