From 8f9e192e9d1c6fab9843939ff9117f6bb3725943 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Sun, 1 Feb 2015 16:44:52 +0100
Subject: [PATCH] altos/stmf0: Support PA11/PA12 remapping

Small pin-count versions of the STMF0 can remap PA11/PA12 on the same
pins as PA9/PA10. These are used by USB, so have the USB driver deal
with remapping them.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/stmf0/ao_usb_stm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/stmf0/ao_usb_stm.c b/src/stmf0/ao_usb_stm.c
index e0ff541a..3ea7da5e 100644
--- a/src/stmf0/ao_usb_stm.c
+++ b/src/stmf0/ao_usb_stm.c
@@ -23,6 +23,10 @@
 #define USB_DEBUG_DATA	0
 #define USB_ECHO	0
 
+#ifndef AO_PA11_PA12_RMP
+#error "must define AO_PA11_PA12_RMP"
+#endif
+
 #ifndef USE_USB_STDIO
 #define USE_USB_STDIO	1
 #endif
@@ -1069,6 +1073,12 @@ __code struct ao_cmds ao_usb_cmds[] = {
 void
 ao_usb_init(void)
 {
+	/* Turn on syscfg */
+	stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGCOMPEN);
+
+	/* Set PA11/PA12 remapping bit */
+	stm_syscfg.cfgr1 |= (AO_PA11_PA12_RMP << STM_SYSCFG_CFGR1_PA11_PA12_RMP);
+
 	ao_usb_enable();
 
 	debug ("ao_usb_init\n");
-- 
2.30.2