Refactor PHY to support more flexible and scalable architecture.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/fs/file.c

@@ -528,54 +528,3 @@ int delete_file(file_t *ef) {
     low_flash_available();
     return CCID_OK;
 }
-
-#ifndef ENABLE_EMULATION
-int parse_phy_data(const uint8_t *data, uint8_t len) {
-    file_t *ef_phy = search_by_fid(EF_PHY, NULL, SPECIFY_EF);
-    if (!ef_phy) {
-        return CCID_ERR_FILE_NOT_FOUND;
-    }
-    uint8_t tmp[PHY_MAX_SIZE];
-    memset(tmp, 0, sizeof(tmp));
-    uint16_t opts = 0;
-    if (file_has_data(ef_phy)) {
-        memcpy(tmp, file_get_data(ef_phy), MIN(sizeof(tmp), file_get_size(ef_phy)));
-        if (file_get_size(ef_phy) >= 8) {
-            opts = (tmp[PHY_OPTS] << 8) | tmp[PHY_OPTS + 1];
-        }
-    }
-    const uint8_t *p = data;
-    while (p < data + len) {
-        uint8_t tag = *p++;
-        switch (tag) {
-            case PHY_VID:
-                memcpy(tmp + PHY_VID, p, 2);
-                opts |= PHY_OPT_VPID;
-                p += 2;
-                break;
-            case PHY_PID:
-                memcpy(tmp + PHY_PID, p, 2);
-                opts |= PHY_OPT_VPID;
-                p += 2;
-                break;
-            case PHY_LED_GPIO:
-                tmp[PHY_LED_GPIO] = *p++;
-                opts |= PHY_OPT_GPIO;
-                break;
-            case PHY_LED_BTNESS:
-                tmp[PHY_LED_BTNESS] = *p++;
-                opts |= PHY_OPT_BTNESS;
-                break;
-            case PHY_OPTS:
-                opts = (opts & ~PHY_OPT_MASK) | (((*p << 8) | *(p + 1)) & PHY_OPT_MASK);
-                p += 2;
-                break;
-        }
-    }
-    tmp[PHY_OPTS] = opts >> 8;
-    tmp[PHY_OPTS + 1] = opts & 0xff;
-    file_put_data(ef_phy, tmp, sizeof(tmp));
-    low_flash_available();
-    return CCID_OK;
-}
-#endif

src/fs/file.h

@@ -15,7 +15,6 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-
 #ifndef _FILE_H_
 #define _FILE_H_
 
@@ -27,6 +26,7 @@
 #include <stdint.h>
 #endif
 #include "compat.h"
+#include "phy.h"
 
 #define FILE_TYPE_NOT_KNOWN     0x00
 #define FILE_TYPE_DF            0x04
@@ -67,28 +67,6 @@
 #define EF_SKDFS    0x6045
 #define EF_META     0xE010
 
-#define EF_PHY       0xE020
-
-#define PHY_VID         0x0
-#define PHY_PID         0x2
-#define PHY_LED_GPIO    0x4
-#define PHY_LED_BTNESS  0x5
-#define PHY_OPTS        0x6
-
-#define PHY_OPT_WCID    0x1
-#define PHY_OPT_VPID    0x2
-#define PHY_OPT_GPIO    0x4
-#define PHY_OPT_BTNESS  0x8
-#define PHY_OPT_DIMM    0x10
-
-#define PHY_OPT_MASK    (PHY_OPT_DIMM | PHY_OPT_WCID)
-
-#define PHY_MAX_SIZE    8
-
-#ifndef ENABLE_EMULATION
-extern int parse_phy_data(const uint8_t *data, uint8_t len);
-#endif
-
 #define MAX_DEPTH 4
 
 typedef struct file {

src/fs/phy.c

@@ -0,0 +1,99 @@
+/*
+ * This file is part of the Pico Keys SDK distribution (https://github.com/polhenarejos/pico-keys-sdk).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pico_keys.h"
+#include "file.h"
+
+#ifndef ENABLE_EMULATION
+
+phy_data_t phy_data;
+
+int phy_serialize_data(const phy_data_t *phy, uint8_t *data, uint16_t *len) {
+    if (!phy || !data || !len) {
+        return CCID_ERR_NULL_PARAM;
+    }
+    uint8_t *p = data;
+    if (phy->vidpid_present) {
+        *p++ = PHY_VIDPID;
+        *p++ = phy->vidpid[1];
+        *p++ = phy->vidpid[0];
+        *p++ = phy->vidpid[3];
+        *p++ = phy->vidpid[2];
+    }
+    if (phy->led_gpio_present) {
+        *p++ = PHY_LED_GPIO;
+        *p++ = phy->led_gpio;
+    }
+    if (phy->led_brightness_present) {
+        *p++ = PHY_LED_BTNESS;
+        *p++ = phy->led_brightness;
+    }
+    *p++ = PHY_OPTS;
+    *p++ = phy->opts >> 8;
+    *p++ = phy->opts & 0xff;
+    *len = p - data;
+    return CCID_OK;
+}
+#include <stdio.h>
+int phy_unserialize_data(const uint8_t *data, uint16_t len, phy_data_t *phy) {
+    if (!phy || !data || !len) {
+        return CCID_ERR_NULL_PARAM;
+    }
+    memset(phy, 0, sizeof(phy_data_t));
+    const uint8_t *p = data;
+    while (p < data + len) {
+        printf("TAG %x\n",*p);
+        switch (*p++) {
+            case PHY_VIDPID:
+                memcpy(phy->vidpid, p, 4);
+                phy->vidpid[1] = *p++;
+                phy->vidpid[0] = *p++;
+                phy->vidpid[3] = *p++;
+                phy->vidpid[2] = *p++;
+                phy->vidpid_present = true;
+                break;
+            case PHY_LED_GPIO:
+                phy->led_gpio = *p++;
+                phy->led_gpio_present = true;
+                break;
+            case PHY_LED_BTNESS:
+                phy->led_brightness = *p++;
+                phy->led_brightness_present = true;
+                break;
+            case PHY_OPTS:
+                phy->opts = (*p << 8) | *(p + 1);
+                p += 2;
+                break;
+        }
+    }
+    return CCID_OK;
+}
+
+int phy_init() {
+    memset(&phy_data, 0, sizeof(phy_data_t));
+    if (file_has_data(ef_phy)) {
+        const uint8_t *data = file_get_data(ef_phy);
+        DEBUG_DATA(data, file_get_size(ef_phy));
+        int ret = phy_unserialize_data(data, file_get_size(ef_phy), &phy_data);
+        if (ret != CCID_OK) {
+            return ret;
+        }
+    }
+
+    return CCID_OK;
+}
+#endif

src/fs/phy.h

@@ -0,0 +1,60 @@
+/*
+ * This file is part of the Pico Keys SDK distribution (https://github.com/polhenarejos/pico-keys-sdk).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _PHY_H_
+#define _PHY_H_
+
+#define EF_PHY       0xE020
+
+#define PHY_VIDPID      0x0
+#define PHY_LED_GPIO    0x4
+#define PHY_LED_BTNESS  0x5
+#define PHY_OPTS        0x6
+
+#define PHY_OPT_WCID    0x1
+#define PHY_OPT_DIMM    0x2
+#define PHY_OPT_SECURE_BOOT 0x4
+#define PHY_OPT_SECURE_LOCK 0x8
+
+typedef struct phy_data {
+    union {
+        struct {
+            uint16_t vid;
+            uint16_t pid;
+        };
+        uint8_t vidpid[4];
+    };
+    uint8_t led_gpio;
+    uint8_t led_brightness;
+    uint16_t opts;
+    bool vidpid_present;
+    bool led_gpio_present;
+    bool led_brightness_present;
+} phy_data_t;
+
+#define PHY_OPT_MASK    (PHY_OPT_SECURE_LOCK | PHY_OPT_SECURE_BOOT | PHY_OPT_DIMM | PHY_OPT_WCID)
+
+#define PHY_MAX_SIZE    8
+
+#ifndef ENABLE_EMULATION
+extern int phy_serialize_data(const phy_data_t *phy, uint8_t *data, uint16_t *len);
+extern int phy_unserialize_data(const uint8_t *data, uint16_t len, phy_data_t *phy);
+extern int phy_init();
+extern phy_data_t phy_data;
+#endif
+
+#endif // _PHY_H_