stm32l4: support flashing L45x/46x devices

Also fixes incorrect comment about MSI range.

Change-Id: If1339a00e50db44195dfcd5c767ba3f5d9035451
Signed-off-by: Juha Niskanen <juha.niskanen@haltian.com>
Reviewed-on: http://openocd.zylin.com/4122


Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

src/flash/nor/stm32l4x.c

@@ -27,18 +27,22 @@
 
 /* STM32L4xxx series for reference.
  *
- * RM0351
- * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/reference_manual/DM00083560.pdf
+ * RM0351 (STM32L4x5/STM32L4x6)
+ * http://www.st.com/resource/en/reference_manual/dm00083560.pdf
  *
- * STM32L476RG Datasheet (for erase timing)
- * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00108832.pdf
+ * RM0394 (STM32L43x/44x/45x/46x)
+ * http://www.st.com/resource/en/reference_manual/dm00151940.pdf
  *
+ * STM32L476RG Datasheet (for erase timing)
+ * http://www.st.com/resource/en/datasheet/stm32l476rg.pdf
  *
- * The device has normally two banks, but on 512 and 256 kiB devices an
- * option byte is available to map all sectors to the first bank.
+ * The RM0351 devices have normally two banks, but on 512 and 256 kiB devices
+ * an option byte is available to map all sectors to the first bank.
  * Both STM32 banks are treated as one OpenOCD bank, as other STM32 devices
  * handlers do!
  *
+ * RM0394 devices have a single bank only.
+ *
  */
 
 /* Erase time can be as high as 25ms, 10x this and assume it's toast... */
@@ -618,6 +622,9 @@ static int stm32l4_probe(struct flash_bank *bank)
 	case 0x415:
 		max_flash_size_in_kb = 1024;
 		break;
+	case 0x462:
+		max_flash_size_in_kb = 512;
+		break;
 	case 0x435:
 		max_flash_size_in_kb = 256;
 		break;
@@ -725,8 +732,12 @@ static int get_stm32l4_info(struct flash_bank *bank, char *buf, int buf_size)
 		device_str = "STM32L475/476/486";
 		break;
 
+	case 0x462:
+		device_str = "STM32L45x/46x";
+		break;
+
 	case 0x435:
-		device_str = "STM32L43x";
+		device_str = "STM32L43x/44x";
 		break;
 
 	default:

tcl/target/stm32l4x.cfg

@@ -75,7 +75,7 @@ $_TARGETNAME configure -event reset-init {
 	# Use MSI 24 MHz clock, compliant even with VOS == 2.
 	# 3 WS compliant with VOS == 2 and 24 MHz.
 	mww 0x40022000 0x00000103   ;# FLASH_ACR = PRFTBE | 3(Latency)
-	mww 0x40021000 0x00000099   ;# RCC_CR = MSI_ON | MSIRGSEL| MSI Range 10
+	mww 0x40021000 0x00000099   ;# RCC_CR = MSI_ON | MSIRGSEL | MSI Range 9
 	# Boost JTAG frequency
 	adapter_khz 4000
 }