svn commit: r297703 - head/sys/arm/allwinner

[Jared McNeill]

Author: jmcneill
Date: Fri Apr  8 10:54:59 2016
New Revision: 297703
URL: https://svnweb.freebsd.org/changeset/base/297703

Log:
  Add function for mapping SRAM-D area to USB0 (OTG) controller. Use a lower
  pass number to ensure that this driver is loaded before EMAC or OTG,
  regardless of the order of nodes in the DT.

Modified:
  head/sys/arm/allwinner/a10_sramc.c
  head/sys/arm/allwinner/a10_sramc.h

Modified: head/sys/arm/allwinner/a10_sramc.c
==============================================================================
--- head/sys/arm/allwinner/a10_sramc.c	Fri Apr  8 10:23:48 2016	(r297702)
+++ head/sys/arm/allwinner/a10_sramc.c	Fri Apr  8 10:54:59 2016	(r297703)
@@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
 #include "a10_sramc.h"
 
 #define	SRAM_CTL1_CFG		0x04
+#define	CTL1_CFG_SRAMD_MAP_USB0	(1 << 0)
 
 struct a10_sramc_softc {
 	struct resource		*res;
@@ -113,7 +114,8 @@ static driver_t a10_sramc_driver = {
 
 static devclass_t a10_sramc_devclass;
 
-DRIVER_MODULE(a10_sramc, simplebus, a10_sramc_driver, a10_sramc_devclass, 0, 0);
+EARLY_DRIVER_MODULE(a10_sramc, simplebus, a10_sramc_driver, a10_sramc_devclass,
+    0, 0, BUS_PASS_RESOURCE + BUS_PASS_ORDER_EARLY);
 
 int
 a10_map_to_emac(void)
@@ -131,3 +133,20 @@ a10_map_to_emac(void)
 
 	return (0);
 }
+
+int
+a10_map_to_otg(void)
+{
+	struct a10_sramc_softc *sc = a10_sramc_sc;
+	uint32_t reg_value;
+
+	if (sc == NULL)
+		return (ENXIO);
+
+	/* Map SRAM to OTG */
+	reg_value = sramc_read_4(sc, SRAM_CTL1_CFG);
+	reg_value |= CTL1_CFG_SRAMD_MAP_USB0;
+	sramc_write_4(sc, SRAM_CTL1_CFG, reg_value);
+
+	return (0);
+}

Modified: head/sys/arm/allwinner/a10_sramc.h
==============================================================================
--- head/sys/arm/allwinner/a10_sramc.h	Fri Apr  8 10:23:48 2016	(r297702)
+++ head/sys/arm/allwinner/a10_sramc.h	Fri Apr  8 10:54:59 2016	(r297703)
@@ -30,5 +30,6 @@
 #define	_A10_SRAMC_H_
 
 int	a10_map_to_emac(void);
+int	a10_map_to_otg(void);
 
 #endif