bootloader: move esp32 specific code from bootloader_common

Also implements bootloader_clock_get_rated_freq_mhz for esp32s2beta.

Closes IDF-758

components/bootloader_support/CMakeLists.txt

@@ -8,6 +8,7 @@ set(srcs
     "src/flash_partitions.c"
     "src/flash_qio_mode.c"
     "src/bootloader_flash_config_${IDF_TARGET}.c"
+    "src/bootloader_efuse_${IDF_TARGET}.c"
     )
 
 if(IDF_TARGET STREQUAL "esp32")
@@ -26,7 +27,6 @@ if(BOOTLOADER_BUILD)
         "src/${IDF_TARGET}/secure_boot_signatures.c"
         "src/${IDF_TARGET}/secure_boot.c"
         "src/${IDF_TARGET}/bootloader_${IDF_TARGET}.c"
-        "src/${IDF_TARGET}/bootloader_clock_${IDF_TARGET}.c"
         )
 else()
     list(APPEND srcs

components/bootloader_support/component.mk

@@ -19,7 +19,8 @@ ifndef IS_BOOTLOADER_BUILD
 COMPONENT_OBJEXCLUDE := src/bootloader_init.o
 endif
 
-COMPONENT_OBJEXCLUDE += src/bootloader_flash_config_esp32s2beta.o
+COMPONENT_OBJEXCLUDE += src/bootloader_flash_config_esp32s2beta.o \
+			src/bootloader_efuse_esp32s2beta.o
 
 #
 # Secure boot signing key support

components/bootloader_support/src/bootloader_common.c

@@ -33,7 +33,6 @@
 #include "soc/gpio_periph.h"
 #include "soc/rtc.h"
 #include "soc/efuse_reg.h"
-#include "soc/apb_ctrl_reg.h"
 #include "esp_image_format.h"
 #include "bootloader_sha.h"
 #include "sys/param.h"
@@ -280,35 +279,6 @@ void bootloader_common_vddsdio_configure(void)
 #endif // CONFIG_BOOTLOADER_VDDSDIO_BOOST
 }
 
-#ifdef CONFIG_IDF_TARGET_ESP32
-uint8_t bootloader_common_get_chip_revision(void)
-{
-    uint8_t eco_bit0, eco_bit1, eco_bit2;
-    eco_bit0 = (REG_READ(EFUSE_BLK0_RDATA3_REG) & 0xF000) >> 15;
-    eco_bit1 = (REG_READ(EFUSE_BLK0_RDATA5_REG) & 0x100000) >> 20;
-    eco_bit2 = (REG_READ(APB_CTRL_DATE_REG) & 0x80000000) >> 31;
-    uint32_t combine_value = (eco_bit2 << 2) | (eco_bit1 << 1) | eco_bit0;
-    uint8_t chip_ver = 0;
-    switch (combine_value) {
-    case 0:
-        chip_ver = 0;
-        break;
-    case 1:
-        chip_ver = 1;
-        break;
-    case 3:
-        chip_ver = 2;
-        break;
-    case 7:
-        chip_ver = 3;
-        break;
-    default:
-        chip_ver = 0;
-        break;
-    }
-    return chip_ver;
-}
-#endif
 
 esp_err_t bootloader_common_check_chip_validity(const esp_image_header_t* img_hdr)
 {

components/bootloader_support/src/bootloader_efuse_esp32.c

@@ -0,0 +1,56 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "bootloader_common.h"
+#include "bootloader_clock.h"
+#include "soc/efuse_reg.h"
+#include "soc/apb_ctrl_reg.h"
+
+uint8_t bootloader_common_get_chip_revision(void)
+{
+    uint8_t eco_bit0, eco_bit1, eco_bit2;
+    eco_bit0 = (REG_READ(EFUSE_BLK0_RDATA3_REG) & 0xF000) >> 15;
+    eco_bit1 = (REG_READ(EFUSE_BLK0_RDATA5_REG) & 0x100000) >> 20;
+    eco_bit2 = (REG_READ(APB_CTRL_DATE_REG) & 0x80000000) >> 31;
+    uint32_t combine_value = (eco_bit2 << 2) | (eco_bit1 << 1) | eco_bit0;
+    uint8_t chip_ver = 0;
+    switch (combine_value) {
+    case 0:
+        chip_ver = 0;
+        break;
+    case 1:
+        chip_ver = 1;
+        break;
+    case 3:
+        chip_ver = 2;
+        break;
+    case 7:
+        chip_ver = 3;
+        break;
+    default:
+        chip_ver = 0;
+        break;
+    }
+    return chip_ver;
+}
+
+int bootloader_clock_get_rated_freq_mhz()
+{
+    //Check if ESP32 is rated for a CPU frequency of 160MHz only
+    if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
+        REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
+        return 160;
+    }
+    return 240;
+}

components/bootloader_support/src/bootloader_efuse_esp32s2beta.c

@@ -0,0 +1,29 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "sdkconfig.h"
+#include "bootloader_clock.h"
+#include "bootloader_common.h"
+
+int bootloader_clock_get_rated_freq_mhz()
+{
+    /* No known limitation: all chips are 240MHz rated */
+    return 240;
+}
+
+uint8_t bootloader_common_get_chip_revision(void)
+{
+    /* No other revisions for ESP32-S2beta */
+    return 0;
+}

components/bootloader_support/src/esp32/bootloader_clock_esp32.c

@@ -1,13 +0,0 @@
-#include "soc/efuse_reg.h"
-#include "bootloader_clock.h"
-
-int bootloader_clock_get_rated_freq_mhz()
-{
-    //Check if ESP32 is rated for a CPU frequency of 160MHz only
-    if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
-        REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
-        return 160;
-    }
-    return 240;
-}
-

components/bootloader_support/src/esp32/bootloader_esp32.c

@@ -1,3 +1,17 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #include "bootloader_common.h"
 #include "sdkconfig.h"
 #include "soc/efuse_reg.h"

components/bootloader_support/src/esp32s2beta/bootloader_clock_esp32s2beta.c

@@ -1,10 +0,0 @@
-#include "sdkconfig.h"
-#include "bootloader_clock.h"
-
-int bootloader_clock_get_rated_freq_mhz()
-{
-// TODO: implement bootloader_clock_get_rated_freq_mhz for esp32s2beta - IDF-758
-    return 999;
-}
-
-

components/bootloader_support/src/esp32s2beta/bootloader_esp32s2beta.c

@@ -1,3 +1,17 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #include "bootloader_common.h"
 #include "sdkconfig.h"
 #include "soc/efuse_reg.h"