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/* sbc_harness/main.c - Main entry point and event loop for sbc-harness
*
* Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <string.h> /* libc: for strlen() */
#include <pico/stdio_uart.h> /* pico-sdk:pico_stdio_uart: for stdio_uart_init() */
#include <hardware/flash.h> /* pico-sdk:hardware_flash: for flash_get_unique_id() */
#include <libcr/coroutine.h>
#include <libhw/rp2040_hwspi.h>
#include <libhw/w5500.h>
#include <libmisc/hash.h>
#include <libmisc/vcall.h>
#include <libusb/usb_common.h>
#include <libdhcp/client.h>
#include <lib9p/srv.h>
#define LOG_NAME MAIN
#include <libmisc/log.h>
#include "usb_keyboard.h"
#include "config.h"
static COROUTINE hello_world_cr(void *_chan) {
const char *msg = "Hello world!\n";
usb_keyboard_rpc_t *chan = _chan;
cr_begin();
for (size_t i = 0;; i = (i+1) % strlen(msg)) {
int result = usb_keyboard_rpc_send_req(chan, (uint32_t)msg[i]);
if (result < 1) {
errorf("error sending rune U+%d", (uint32_t)msg[i]);
break;
}
}
cr_end();
}
static COROUTINE dhcp_cr(void *_chip) {
struct w5500 *chip = _chip;
cr_begin();
dhcp_client_main(chip, "harness");
cr_end();
}
struct {
struct rp2040_hwspi dev_spi;
struct w5500 dev_w5500;
usb_keyboard_rpc_t keyboard_chan;
uint16_t usb_serial[sizeof(uint64_t)*2]; /* UTF-16 */
struct lib9p_srv srv;
} globals;
static COROUTINE read9p_cr(void *) {
cr_begin();
lib9p_srv_read_cr(&globals.srv,
VCALL(&globals.dev_w5500, tcp_listen, CONFIG_9P_PORT));
cr_end();
}
const char *hexdig = "0123456789ABCDEF";
static_assert(CONFIG_9P_MAX_REQS*_CONFIG_9P_NUM_SOCKS <= 16);
COROUTINE init_cr(void *) {
cr_begin();
/* NOR flash chips have a (bog-?)standard "RUID" "Read Unique
* ID" instruction; use our flash chip's unique ID as the
* basis for our serial numbers. */
uint64_t flash_id64;
static_assert(sizeof(flash_id64) == FLASH_UNIQUE_ID_SIZE_BYTES);
flash_get_unique_id((uint8_t *)&flash_id64);
uint32_t flash_id32 = hash(&flash_id64, sizeof(flash_id64));
static_assert(sizeof(flash_id32) == sizeof(hash(NULL, 0)));
uint8_t flash_id24[3] = {
(uint8_t)((flash_id32 >> 16) & 0xFF),
(uint8_t)((flash_id32 >> 8) & 0xFF),
(uint8_t)((flash_id32 >> 0) & 0xFF),
};
rp2040_hwspi_init(&globals.dev_spi, "W5500", RP2040_HWSPI_0,
SPI_MODE_0, /* the W5500 supports mode 0 or mode 3 */
60*1000*1000, /* as close to the W5500's max rate of 80MHz as we can without hwspi borking */
16, /* PIN_MISO */
19, /* PIN_MOSI */
18, /* PIN_CLK */
17); /* PIN_CS */
w5500_init(&globals.dev_w5500, "W5500", &globals.dev_spi,
21, /* PIN_INTR */
20, /* PIN_RESET */
((struct net_eth_addr){{
/* vendor ID: "Wiznet" */
0x00, 0x08, 0xDC,
/* serial number */
flash_id24[0], flash_id24[1], flash_id24[2],
}}));
static_assert(sizeof(flash_id64)*2 == LM_ARRAY_LEN(globals.usb_serial));
for (size_t i = 0; i < LM_ARRAY_LEN(globals.usb_serial); i++)
globals.usb_serial[i] = hexdig[(flash_id64 >> ((sizeof(flash_id64)*8)-((i+1)*4))) & 0xF];
usb_common_earlyinit(globals.usb_serial, sizeof(globals.usb_serial));
usb_keyboard_init();
usb_common_lateinit();
globals.keyboard_chan = (usb_keyboard_rpc_t){0};
/* set up coroutines **************************************************/
coroutine_add("usb_common", usb_common_cr, NULL);
coroutine_add("usb_keyboard", usb_keyboard_cr, &globals.keyboard_chan);
coroutine_add("hello_world", hello_world_cr, &globals.keyboard_chan);
coroutine_add_with_stack_size(4*1024, "dhcp", dhcp_cr, &globals.dev_w5500);
for (int i = 0; i < _CONFIG_9P_NUM_SOCKS; i++) {
char name[] = {'r', 'e', 'a', 'd', '-', hexdig[i], '\0'};
coroutine_add(name, read9p_cr, NULL);
}
for (int i = 0; i < CONFIG_9P_MAX_REQS*_CONFIG_9P_NUM_SOCKS; i++) {
char name[] = {'w', 'r', 'i', 't', 'e', '-', hexdig[i], '\0'};
coroutine_add(name, lib9p_srv_write_cr, &globals.srv);
}
cr_exit();
}
int main() {
stdio_uart_init();
/* char *hdr = "=" * (80-strlen("info : MAIN: ")); */
infof("===================================================================");
coroutine_add("init", init_cr, NULL);
coroutine_main();
}
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