flash/stm32l4x: support STM32C0x devices

this new STM32 series family introduces 2 devices:
STM32C011xx (0x443) and STM32C031xx (0x453)

both devices have 32 Kbytes single flash bank.

Change-Id: I4e890789e44e3b174c0e9c0e1068383ecdbb865f
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6874
Reviewed-by: Nemui Trinomius <nemuisan_kawausogasuki@live.jp>
Tested-by: jenkins
Reviewed-by: zapb <dev@zapb.de>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/flash/nor/stm32l4x.c

@@ -80,6 +80,12 @@
  * http://www.st.com/resource/en/reference_manual/dm00451556.pdf
  */
 
+/* STM32C0xxx series for reference.
+ *
+ * RM0490 (STM32C0x1)
+ * http://www.st.com/resource/en/reference_manual/dm00781702.pdf
+ */
+
 /* STM32G0xxx series for reference.
  *
  * RM0444 (STM32G0x1)
@@ -263,7 +269,7 @@ struct stm32l4_wrp {
 };
 
 /* human readable list of families this drivers supports (sorted alphabetically) */
-static const char *device_families = "STM32G0/G4/L4/L4+/L5/U5/WB/WL";
+static const char *device_families = "STM32C0/G0/G4/L4/L4+/L5/U5/WB/WL";
 
 static const struct stm32l4_rev stm32l47_l48xx_revs[] = {
 	{ 0x1000, "1" }, { 0x1001, "2" }, { 0x1003, "3" }, { 0x1007, "4" }
@@ -273,6 +279,15 @@ static const struct stm32l4_rev stm32l43_l44xx_revs[] = {
 	{ 0x1000, "A" }, { 0x1001, "Z" }, { 0x2001, "Y" },
 };
 
+
+static const struct stm32l4_rev stm32c01xx_revs[] = {
+	{ 0x1000, "A" }, { 0x1001, "Z" },
+};
+
+static const struct stm32l4_rev stm32c03xx_revs[] = {
+	{ 0x1000, "A" }, { 0x1001, "Z" },
+};
+
 static const struct stm32l4_rev stm32g05_g06xx_revs[] = {
 	{ 0x1000, "A" },
 };
@@ -371,6 +386,30 @@ static const struct stm32l4_part_info stm32l4_parts[] = {
 	  .otp_base              = 0x1FFF7000,
 	  .otp_size              = 1024,
 	},
+	{
+	  .id                    = DEVID_STM32C01XX,
+	  .revs                  = stm32c01xx_revs,
+	  .num_revs              = ARRAY_SIZE(stm32c01xx_revs),
+	  .device_str            = "STM32C01xx",
+	  .max_flash_size_kb     = 32,
+	  .flags                 = F_NONE,
+	  .flash_regs_base       = 0x40022000,
+	  .fsize_addr            = 0x1FFF75A0,
+	  .otp_base              = 0x1FFF7000,
+	  .otp_size              = 1024,
+	},
+	{
+	  .id                    = DEVID_STM32C03XX,
+	  .revs                  = stm32c03xx_revs,
+	  .num_revs              = ARRAY_SIZE(stm32c03xx_revs),
+	  .device_str            = "STM32C03xx",
+	  .max_flash_size_kb     = 32,
+	  .flags                 = F_NONE,
+	  .flash_regs_base       = 0x40022000,
+	  .fsize_addr            = 0x1FFF75A0,
+	  .otp_base              = 0x1FFF7000,
+	  .otp_size              = 1024,
+	},
 	{
 	  .id                    = DEVID_STM32G05_G06XX,
 	  .revs                  = stm32g05_g06xx_revs,
@@ -1855,6 +1894,8 @@ static int stm32l4_probe(struct flash_bank *bank)
 		}
 		break;
 	case DEVID_STM32L43_L44XX:
+	case DEVID_STM32C01XX:
+	case DEVID_STM32C03XX:
 	case DEVID_STM32G05_G06XX:
 	case DEVID_STM32G07_G08XX:
 	case DEVID_STM32L45_L46XX:

src/flash/nor/stm32l4x.h

@@ -87,6 +87,8 @@
 /* Supported device IDs */
 #define DEVID_STM32L47_L48XX	0x415
 #define DEVID_STM32L43_L44XX	0x435
+#define DEVID_STM32C01XX		0x443
+#define DEVID_STM32C03XX		0x453
 #define DEVID_STM32G05_G06XX	0x456
 #define DEVID_STM32G07_G08XX	0x460
 #define DEVID_STM32L49_L4AXX	0x461

tcl/target/stm32c0x.cfg

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# script for stm32c0x family
+#
+# stm32c0 devices support SWD transports only.
+#
+
+source [find target/swj-dp.tcl]
+source [find mem_helper.tcl]
+
+if { [info exists CHIPNAME] } {
+	set _CHIPNAME $CHIPNAME
+} else {
+	set _CHIPNAME stm32c0x
+}
+
+set _ENDIAN little
+
+# Work-area is a space in RAM used for flash programming
+# By default use 6kB
+if { [info exists WORKAREASIZE] } {
+   set _WORKAREASIZE $WORKAREASIZE
+} else {
+   set _WORKAREASIZE 0x1800
+}
+
+#jtag scan chain
+if { [info exists CPUTAPID] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+   # SWD IDCODE (single drop, arm)
+   set _CPUTAPID 0x0bc11477
+}
+
+swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
+
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
+
+flash bank $_CHIPNAME.flash stm32l4x 0x08000000 0 0 0 $_TARGETNAME
+flash bank $_CHIPNAME.otp   stm32l4x 0x1fff7000 0 0 0 $_TARGETNAME
+
+# reasonable default
+adapter speed 2000
+
+adapter srst delay 100
+if {[using_jtag]} {
+	jtag_ntrst_delay 100
+}
+
+reset_config srst_nogate
+
+if {![using_hla]} {
+	# if srst is not fitted use SYSRESETREQ to
+	# perform a soft reset
+	cortex_m reset_config sysresetreq
+}
+
+$_TARGETNAME configure -event examine-end {
+	# Enable DBGMCU clock
+	# RCC_APB1ENR |= DBGMCUEN
+	mmw 0x4002103C 0x08000000 0
+
+	# Enable debug during low power modes (uses more power)
+	# DBGMCU_CR |= DBG_STANDBY | DBG_STOP
+	mmw 0x40015804 0x00000006 0
+
+	# Stop watchdog counters during halt
+	# DBGMCU_APB1_FZ |= DBG_WDGLS_STOP | DBG_WWDG_STOP
+	mmw 0x40015808 0x00001800 0
+}