Add CYW driver

src/drivers/cyw.h

@@ -0,0 +1,51 @@
+#pragma once
+
+#if MG_ENABLE_TCPIP && defined(MG_ENABLE_DRIVER_CYW) && MG_ENABLE_DRIVER_CYW
+
+struct mg_tcpip_spi_ {
+  void *spi;              // Opaque SPI bus descriptor
+  void (*begin)(void *);  // SPI begin: slave select low
+  void (*end)(void *);    // SPI end: slave select high
+  void (*txn)(void *, uint8_t *, uint8_t *,
+              size_t len);  // SPI transaction: write-read len bytes
+};
+
+struct mg_tcpip_driver_cyw_firmware {
+  const uint8_t * code_addr;
+  size_t code_len;
+  const uint8_t * nvram_addr;
+  size_t nvram_len;
+  const uint8_t * clm_addr;
+  size_t clm_len;
+};
+
+struct mg_tcpip_driver_cyw_data {
+  struct mg_tcpip_spi_ *spi;
+  struct mg_tcpip_driver_cyw_firmware *fw;
+  char *ssid;
+  char *pass;
+  char *apssid;
+  char *appass;
+  uint8_t security; // TBD
+  uint8_t apsecurity; // TBD
+  uint8_t apchannel;
+  bool apmode;      // start in AP mode; 'false' starts connection to 'ssid' if not NULL
+};
+
+//#define MG_TCPIP_DRIVER_INIT(mgr)                                 \
+//  do {                                                            \
+//    static struct mg_tcpip_driver_cyw_data driver_data_;          \
+//    static struct mg_tcpip_if mif_;                               \
+//    MG_SET_WIFI_CONFIG(&driver_data_);                            \
+//    mif_.ip = MG_TCPIP_IP;                                        \
+//    mif_.mask = MG_TCPIP_MASK;                                    \
+//    mif_.gw = MG_TCPIP_GW;                                        \
+//    mif_.driver = &mg_tcpip_driver_pico_w;                        \
+//    mif_.driver_data = &driver_data_;                             \
+//    mif_.recv_queue.size = 8192;                                  \
+//    mif_.mac[0] = 2; /* MAC read from OTP at driver init */       \
+//    mg_tcpip_init(mgr, &mif_);                                    \
+//    MG_INFO(("Driver: cyw, MAC: %M", mg_print_mac, mif_.mac)); \
+//  } while (0)
+
+#endif