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circuitpython/drivers/cyw43/cyw43_ctrl.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018-2019 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include "py/mperrno.h"
#include "py/mphal.h"
#include "drivers/cyw43/cyw43.h"
#include "pendsv.h"
#include "sdio.h"
#define CYW_ENTER MICROPY_PY_LWIP_ENTER
#define CYW_EXIT MICROPY_PY_LWIP_EXIT
#ifdef pyb_pin_WL_HOST_WAKE
#define USE_SDIOIT (0)
#else
#define USE_SDIOIT (1)
#endif
#define CYW43_SLEEP_MAX (50)
#define WIFI_JOIN_STATE_ACTIVE (0x0001)
#define WIFI_JOIN_STATE_FAIL (0x0002)
#define WIFI_JOIN_STATE_NONET (0x0003)
#define WIFI_JOIN_STATE_BADAUTH (0x0004)
#define WIFI_JOIN_STATE_AUTH (0x0200)
#define WIFI_JOIN_STATE_LINK (0x0400)
#define WIFI_JOIN_STATE_KEYED (0x0800)
#define WIFI_JOIN_STATE_ALL (0x0e01)
#define CYW43_STA_IS_ACTIVE(self) (((self)->itf_state >> CYW43_ITF_STA) & 1)
#define CYW43_AP_IS_ACTIVE(self) (((self)->itf_state >> CYW43_ITF_AP) & 1)
cyw43_t cyw43_state;
void (*cyw43_poll)(void);
uint32_t cyw43_sleep;
STATIC void cyw43_poll_func(void);
STATIC void cyw43_wifi_ap_init(cyw43_t *self);
STATIC void cyw43_wifi_ap_set_up(cyw43_t *self, bool up);
static inline uint32_t cyw43_get_be16(const uint8_t *buf) {
return buf[0] << 8 | buf[1];
}
static inline uint32_t cyw43_get_be32(const uint8_t *buf) {
return buf[0] << 24 | buf[1] << 16 | buf[2] << 8 | buf[3];
}
static inline void cyw43_delay_ms(uint32_t ms) {
mp_hal_delay_ms(ms);
}
/*******************************************************************************/
// Initialisation and polling
void cyw43_init(cyw43_t *self) {
#ifdef pyb_pin_WL_HOST_WAKE
mp_hal_pin_config(pyb_pin_WL_HOST_WAKE, MP_HAL_PIN_MODE_INPUT, MP_HAL_PIN_PULL_NONE, 0);
#endif
mp_hal_pin_config(pyb_pin_WL_REG_ON, MP_HAL_PIN_MODE_OUTPUT, MP_HAL_PIN_PULL_NONE, 0);
mp_hal_pin_low(pyb_pin_WL_REG_ON);
#ifdef pyb_pin_WL_RFSW_VDD
mp_hal_pin_config(pyb_pin_WL_RFSW_VDD, MP_HAL_PIN_MODE_OUTPUT, MP_HAL_PIN_PULL_NONE, 0); // RF-switch power
mp_hal_pin_low(pyb_pin_WL_RFSW_VDD);
#endif
cyw43_ll_init(&self->cyw43_ll, self);
self->itf_state = 0;
self->wifi_scan_state = 0;
self->wifi_join_state = 0;
self->pend_disassoc = false;
self->pend_rejoin= false;
self->pend_rejoin_wpa = false;
self->ap_channel = 3;
self->ap_ssid_len = 0;
self->ap_key_len = 0;
strncpy(self->hostname, MICROPY_BOARD_HOSTNAME, MICROPY_BOARD_HOSTNAME_LENGTH);
self->hostname[MICROPY_BOARD_HOSTNAME_LENGTH - 1] = 0;
cyw43_poll = NULL;
}
void cyw43_deinit(cyw43_t *self) {
if (cyw43_poll == NULL) {
return;
}
CYW_ENTER
// Stop the TCP/IP network interfaces.
cyw43_tcpip_deinit(self, 0);
cyw43_tcpip_deinit(self, 1);
// Turn off the SDIO bus.
#if USE_SDIOIT
sdio_enable_irq(false);
#endif
sdio_deinit();
// Power off the WLAN chip and make sure all state is reset.
cyw43_init(self);
CYW_EXIT
}
STATIC int cyw43_ensure_up(cyw43_t *self) {
if (cyw43_poll != NULL) {
cyw43_ll_bus_sleep(&self->cyw43_ll, false);
return 0;
}
CYW_ENTER
// Disable the netif if it was previously up
cyw43_tcpip_deinit(self, CYW43_ITF_STA);
cyw43_tcpip_deinit(self, CYW43_ITF_AP);
self->itf_state = 0;
// Reset and power up the WL chip
mp_hal_pin_low(pyb_pin_WL_REG_ON);
cyw43_delay_ms(20);
mp_hal_pin_high(pyb_pin_WL_REG_ON);
cyw43_delay_ms(50);
// Initialise SDIO bus
// IRQ priority only needs to be higher than CYW_ENTER/EXIT protection (PENDSV)
sdio_init(NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 14, 0));
// Initialise the low-level driver
uint8_t mac[6];
mp_hal_get_mac(MP_HAL_MAC_WLAN0, mac);
int ret = cyw43_ll_bus_init(&self->cyw43_ll, mac);
if (ret != 0) {
CYW_EXIT
return ret;
}
// Enable async events from low-level driver
cyw43_sleep = CYW43_SLEEP_MAX;
cyw43_poll = cyw43_poll_func;
#if USE_SDIOIT
sdio_enable_irq(true);
#else
extern void extint_set(const pin_obj_t *pin, uint32_t mode);
extint_set(pyb_pin_WL_HOST_WAKE, GPIO_MODE_IT_FALLING);
#endif
CYW_EXIT
return ret;
}
// This function must always be executed at the level where CYW_ENTER is effectively active
STATIC void cyw43_poll_func(void) {
if (cyw43_poll == NULL) {
// Poll scheduled during deinit, just ignore it
return;
}
cyw43_t *self = &cyw43_state;
cyw43_ll_process_packets(&self->cyw43_ll);
if (self->pend_disassoc) {
self->pend_disassoc = false;
cyw43_ll_ioctl(&self->cyw43_ll, CYW43_IOCTL_SET_DISASSOC, 0, NULL, CYW43_ITF_STA);
}
if (self->pend_rejoin_wpa) {
self->pend_rejoin_wpa = false;
cyw43_ll_wifi_set_wpa_auth(&self->cyw43_ll);
}
if (self->pend_rejoin) {
self->pend_rejoin = false;
cyw43_ll_wifi_rejoin(&self->cyw43_ll);
self->wifi_join_state = WIFI_JOIN_STATE_ACTIVE;
}
if (cyw43_sleep == 0) {
cyw43_ll_bus_sleep(&self->cyw43_ll, true);
#if !USE_SDIOIT
sdio_deinit(); // save power while WLAN bus sleeps
#endif
}
#if USE_SDIOIT
sdio_enable_irq(true);
#endif
}
/*******************************************************************************/
// Callback interface to low-level driver
int cyw43_cb_read_host_interrupt_pin(void *cb_data) {
#ifdef pyb_pin_WL_HOST_WAKE
return mp_hal_pin_read(pyb_pin_WL_HOST_WAKE);
#else
return mp_hal_pin_read(pyb_pin_WL_SDIO_1);
#endif
}
void cyw43_cb_ensure_awake(void *cb_data) {
cyw43_sleep = CYW43_SLEEP_MAX;
#if !USE_SDIOIT
sdio_reenable();
#endif
}
STATIC const char *cyw43_async_event_name_table[89] = {
[0 ... 88] = NULL,
[CYW43_EV_SET_SSID] = "SET_SSID",
[CYW43_EV_JOIN] = "JOIN",
[CYW43_EV_AUTH] = "AUTH",
[CYW43_EV_DEAUTH_IND] = "DEAUTH_IND",
[CYW43_EV_ASSOC] = "ASSOC",
[CYW43_EV_DISASSOC] = "DISASSOC",
[CYW43_EV_DISASSOC_IND] = "DISASSOC_IND",
[CYW43_EV_LINK] = "LINK",
[CYW43_EV_PSK_SUP] = "PSK_SUP",
[CYW43_EV_ESCAN_RESULT] = "ESCAN_RESULT",
[CYW43_EV_CSA_COMPLETE_IND] = "CSA_COMPLETE_IND",
[CYW43_EV_ASSOC_REQ_IE] = "ASSOC_REQ_IE",
[CYW43_EV_ASSOC_RESP_IE] = "ASSOC_RESP_IE",
};
STATIC void cyw43_dump_async_event(const cyw43_async_event_t *ev) {
printf("[% 8d] ASYNC(%04x,",
(int)mp_hal_ticks_ms(),
(unsigned int)ev->flags
);
if (ev->event_type < MP_ARRAY_SIZE(cyw43_async_event_name_table)
&& cyw43_async_event_name_table[ev->event_type] != NULL) {
printf("%s", cyw43_async_event_name_table[ev->event_type]);
} else {
printf("%u", (unsigned int)ev->event_type);
}
printf(",%u,%u,%u)\n",
(unsigned int)ev->status,
(unsigned int)ev->reason,
(unsigned int)ev->interface
);
}
void cyw43_cb_process_async_event(void *cb_data, const cyw43_async_event_t *ev) {
cyw43_t *self = cb_data;
if (self->trace_flags & CYW43_TRACE_ASYNC_EV) {
cyw43_dump_async_event(ev);
}
if (ev->event_type == CYW43_EV_ESCAN_RESULT && self->wifi_scan_state == 1) {
// Escan result event
if (ev->status == 8) {
// Partial result
int ret = self->wifi_scan_cb(self->wifi_scan_env, &ev->u.scan_result);
if (ret != 0) {
// TODO need to abort scan, or just ignore any more results
}
} else if (ev->status == 0) {
// Scan complete
self->wifi_scan_state = 2;
}
} else if (ev->event_type == CYW43_EV_DISASSOC) {
cyw43_tcpip_set_link_down(self, CYW43_ITF_STA);
self->wifi_join_state = 0x0000;
/*
} else if (ev->event_type == CYW43_EV_DISASSOC_IND) {
if (ev->interface == CYW43_ITF_AP) {
// Station disassociated with our AP, let DHCP server know so it can free the IP address
dhcp_server_disassoc(&self->dhcp_server, buf + 24);
}
*/
// WiFi join events
} else if (ev->event_type == CYW43_EV_PRUNE) {
if (ev->status == 0 && ev->reason == 8) {
// RSN mismatch, retry join with WPA auth
self->pend_rejoin = true;
self->pend_rejoin_wpa = true;
pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll_func);
}
} else if (ev->event_type == CYW43_EV_SET_SSID) {
if (ev->status == 0) {
// Success setting SSID
} else if (ev->status == 3 && ev->reason == 0) {
self->wifi_join_state = WIFI_JOIN_STATE_NONET;
// No matching SSID found (could be out of range, or down)
} else {
// Other failure setting SSID
self->wifi_join_state = WIFI_JOIN_STATE_FAIL;
}
} else if (ev->event_type == CYW43_EV_AUTH) {
if (ev->status == 0) {
self->wifi_join_state |= WIFI_JOIN_STATE_AUTH;
} else if (ev->status == 6) {
// Unsolicited auth packet, ignore it
} else {
// Cannot authenticate
self->wifi_join_state = WIFI_JOIN_STATE_BADAUTH;
}
} else if (ev->event_type == CYW43_EV_DEAUTH_IND) {
if (ev->status == 0 && ev->reason == 2) {
// Deauth, probably because password was wrong; disassociate
self->pend_disassoc = true;
pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll_func);
}
} else if (ev->event_type == CYW43_EV_LINK) {
if (ev->status == 0) {
if (ev->flags & 1) {
// Link is up
if (ev->interface == CYW43_ITF_STA) {
self->wifi_join_state |= WIFI_JOIN_STATE_LINK;
} else {
cyw43_tcpip_set_link_up(self, ev->interface);
}
} else {
// Link is down
cyw43_tcpip_set_link_down(self, ev->interface);
}
}
} else if (ev->event_type == CYW43_EV_PSK_SUP) {
if (ev->status == 6) { // WLC_SUP_KEYED
self->wifi_join_state |= WIFI_JOIN_STATE_KEYED;
} else if ((ev->status == 4 || ev->status == 8 || ev->status == 11) && ev->reason == 15) {
// Timeout waiting for key exchange M1/M3/G1
// Probably at edge of the cell, retry
self->pend_rejoin = true;
pendsv_schedule_dispatch(PENDSV_DISPATCH_CYW43, cyw43_poll_func);
} else {
// PSK_SUP failure
self->wifi_join_state = WIFI_JOIN_STATE_BADAUTH;
}
}
if (self->wifi_join_state == WIFI_JOIN_STATE_ALL) {
// STA connected
self->wifi_join_state = WIFI_JOIN_STATE_ACTIVE;
cyw43_tcpip_set_link_up(self, CYW43_ITF_STA);
}
}
/*******************************************************************************/
// Ioctl and Ethernet interface
int cyw43_ioctl(cyw43_t *self, uint32_t cmd, size_t len, uint8_t *buf, uint32_t iface) {
int ret = cyw43_ensure_up(self);
if (ret) {
return ret;
}
CYW_ENTER
ret = cyw43_ll_ioctl(&self->cyw43_ll, cmd, len, buf, iface);
CYW_EXIT
return ret;
}
int cyw43_send_ethernet(cyw43_t *self, int itf, size_t len, const void *buf, bool is_pbuf) {
int ret = cyw43_ensure_up(self);
if (ret) {
return ret;
}
CYW_ENTER
ret = cyw43_ll_send_ethernet(&self->cyw43_ll, itf, len, buf, is_pbuf);
CYW_EXIT
return ret;
}
/*******************************************************************************/
// WiFi control
STATIC int cyw43_wifi_on(cyw43_t *self, uint32_t country) {
int ret = cyw43_ensure_up(self);
if (ret) {
return ret;
}
#ifdef pyb_pin_WL_RFSW_VDD
// Turn the RF-switch on
mp_hal_pin_high(pyb_pin_WL_RFSW_VDD);
#endif
CYW_ENTER
ret = cyw43_ll_wifi_on(&self->cyw43_ll, country);
CYW_EXIT
return ret;
}
int cyw43_wifi_pm(cyw43_t *self, uint32_t pm_in) {
int ret = cyw43_ensure_up(self);
if (ret) {
return ret;
}
// pm_in: 0x00adbrrm
uint32_t pm = pm_in & 0xf;
uint32_t pm_sleep_ret = (pm_in >> 4) & 0xff;
uint32_t li_bcn = (pm_in >> 12) & 0xf;
uint32_t li_dtim = (pm_in >> 16) & 0xf;
uint32_t li_assoc = (pm_in >> 20) & 0xf;
CYW_ENTER
ret = cyw43_ll_wifi_pm(&self->cyw43_ll, pm, pm_sleep_ret, li_bcn, li_dtim, li_assoc);
CYW_EXIT
return ret;
}
int cyw43_wifi_get_mac(cyw43_t *self, int itf, uint8_t mac[6]) {
mp_hal_get_mac(MP_HAL_MAC_WLAN0, &mac[0]);
return 0;
}
#define MAKE_COUNTRY(a, b, rev) ((a) | (b) << 8 | (rev) << 16)
void cyw43_wifi_set_up(cyw43_t *self, int itf, bool up) {
if (up) {
if (self->itf_state == 0) {
uint32_t country;
extern char pyb_country_code[2];
if (pyb_country_code[0] == '\0' || pyb_country_code[1] == '\0') {
country = MAKE_COUNTRY('X', 'X', 17); // default to world-wide (passive ch 12-14)
} else {
country = MAKE_COUNTRY(pyb_country_code[0], pyb_country_code[1], 0);
}
if (cyw43_wifi_on(self, country) != 0) {
return;
}
cyw43_wifi_pm(self, 10 << 20 | 1 << 16 | 1 << 12 | 20 << 4 | 2);
}
if (itf == CYW43_ITF_AP) {
cyw43_wifi_ap_init(self);
cyw43_wifi_ap_set_up(self, true);
}
if ((self->itf_state & (1 << itf)) == 0) {
CYW_ENTER
cyw43_tcpip_deinit(self, itf);
cyw43_tcpip_init(self, itf);
self->itf_state |= 1 << itf;
CYW_EXIT
}
} else {
if (itf == CYW43_ITF_AP) {
cyw43_wifi_ap_set_up(self, false);
}
}
}
int cyw43_wifi_scan(cyw43_t *self, cyw43_wifi_scan_options_t *opts, void *env, int (*result_cb)(void*, const cyw43_ev_scan_result_t*)) {
if (self->itf_state == 0) {
return -MP_EPERM;
}
cyw43_ensure_up(self);
CYW_ENTER
// Set state and callback data
self->wifi_scan_state = 1;
self->wifi_scan_env = env;
self->wifi_scan_cb = result_cb;
// Start the scan
int ret = cyw43_ll_wifi_scan(&self->cyw43_ll, opts);
CYW_EXIT
return ret;
}
int cyw43_wifi_link_status(cyw43_t *self, int itf) {
if (itf == CYW43_ITF_STA) {
int s = self->wifi_join_state & 0xf;
if (s == WIFI_JOIN_STATE_ACTIVE) {
return CYW43_LINK_JOIN;
} else if (s == WIFI_JOIN_STATE_FAIL) {
return CYW43_LINK_FAIL;
} else if (s == WIFI_JOIN_STATE_NONET) {
return CYW43_LINK_NONET;
} else if (s == WIFI_JOIN_STATE_BADAUTH) {
return CYW43_LINK_BADAUTH;
} else {
return CYW43_LINK_DOWN;
}
} else {
return CYW43_LINK_DOWN;
}
}
/*******************************************************************************/
// WiFi STA
int cyw43_wifi_join(cyw43_t *self, size_t ssid_len, const uint8_t *ssid, size_t key_len, const uint8_t *key, uint32_t auth_type, const uint8_t *bssid, uint32_t channel) {
if (!CYW43_STA_IS_ACTIVE(self)) {
return -MP_EPERM;
}
int ret = cyw43_ensure_up(self);
if (ret) {
return ret;
}
CYW_ENTER
ret = cyw43_ll_wifi_join(&self->cyw43_ll, ssid_len, ssid, key_len, key, auth_type, bssid, channel);
if (ret == 0) {
// Wait for responses: EV_AUTH, EV_LINK, EV_SET_SSID, EV_PSK_SUP
// Will get EV_DEAUTH_IND if password is invalid
self->wifi_join_state = WIFI_JOIN_STATE_ACTIVE;
if (auth_type == 0) {
// For open security we don't need EV_PSK_SUP, so set that flag indicator now
self->wifi_join_state |= WIFI_JOIN_STATE_KEYED;
}
}
CYW_EXIT
return ret;
}
int cyw43_wifi_leave(cyw43_t *self, int itf) {
// Disassociate with SSID
return cyw43_ioctl(self, CYW43_IOCTL_SET_DISASSOC, 0, NULL, itf);
}
/*******************************************************************************/
// WiFi AP
STATIC void cyw43_wifi_ap_init(cyw43_t *self) {
int ret = cyw43_ensure_up(self);
if (ret) {
return;
}
CYW_ENTER
cyw43_ll_wifi_ap_init(&self->cyw43_ll, self->ap_ssid_len, self->ap_ssid, self->ap_auth, self->ap_key_len, self->ap_key, self->ap_channel);
CYW_EXIT
}
STATIC void cyw43_wifi_ap_set_up(cyw43_t *self, bool up) {
int ret = cyw43_ensure_up(self);
if (ret) {
return;
}
CYW_ENTER
cyw43_ll_wifi_ap_set_up(&self->cyw43_ll, up);
CYW_EXIT
}
void cyw43_wifi_ap_get_stas(cyw43_t *self, int *num_stas, uint8_t *macs) {
int ret = cyw43_ensure_up(self);
if (ret) {
return;
}
CYW_ENTER
cyw43_ll_wifi_ap_get_stas(&self->cyw43_ll, num_stas, macs);
CYW_EXIT
}
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