TWL4030 Add power reset button

The Zoom2 power reset button is on the top right side of the
main board.  Press and hold for about to 8 seconds to completely
reset the board.

Some of the beta boards have a hardware problem that prevents
using this feature.  If is difficult to further characterize the
boards that fail.  So disable resetting for all beta boards.

The Zoom1 reset button is the red circle on the top right,
front of the board.  Press and hold the button for 8 seconds to
completely reset the board.

After analyzing beagle, it was determined that other boards
that use the twl4030 for power managment can also make use
this function.

The resetting is done by the power management part of the twl4030.
Since there is no existing drivers/power, add one.

The compilation of power/twl4030.h is controlled by the config
variable CONFIG_TWL4030_POWER

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Heiko Schocher <hs@denx.de>

diff --git a/Makefile b/Makefile
index ef535ed881587b30759715888733355876a33bfd..55d33fdd89cbed68bc68754db738d3433415e38f 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -221,6 +221,7 @@ LIBS += drivers/net/phy/libphy.a
 LIBS += drivers/net/sk98lin/libsk98lin.a
 LIBS += drivers/pci/libpci.a
 LIBS += drivers/pcmcia/libpcmcia.a
+LIBS += drivers/power/libpower.a
 LIBS += drivers/spi/libspi.a
 ifeq ($(CPU),mpc83xx)
 LIBS += drivers/qe/qe.a

diff --git a/board/omap3/zoom1/zoom1.c b/board/omap3/zoom1/zoom1.c
index db4d08709feff617d13ff4a788306f4b10c505d5..94437d5be9bf9a1849af7bee3c0373055b0db476 100644 (file)
--- a/board/omap3/zoom1/zoom1.c
+++ b/board/omap3/zoom1/zoom1.c
@@ -31,6 +31,7 @@
  * MA 02111-1307 USA
  */
 #include <common.h>
+#include <twl4030.h>
 #include <asm/io.h>
 #include <asm/arch/mux.h>
 #include <asm/arch/sys_proto.h>
@@ -62,6 +63,14 @@ int misc_init_r(void)
 {
        power_init_r();
        dieid_num_r();
+
+       /*
+        * Board Reset
+        * The board is reset by holding the red button on the
+        * top right front face for eight seconds.
+        */
+       twl4030_power_reset_init();
+
        return 0;
 }
 

diff --git a/board/omap3/zoom2/zoom2.c b/board/omap3/zoom2/zoom2.c
index 08fdafb64470946d0bc2de6553cee521c6e54b73..d0fd55bfe9c0bad8046207aec44c271a47cb5f93 100644 (file)
--- a/board/omap3/zoom2/zoom2.c
+++ b/board/omap3/zoom2/zoom2.c
@@ -32,6 +32,7 @@
 #ifdef CONFIG_STATUS_LED
 #include <status_led.h>
 #endif
+#include <twl4030.h>
 #include <asm/io.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/mem.h>
@@ -156,6 +157,19 @@ int misc_init_r(void)
        zoom2_identify();
        power_init_r();
        dieid_num_r();
+
+       /*
+        * Board Reset
+        * The board is reset by holding the the large button
+        * on the top right side of the main board for
+        * eight seconds.
+        *
+        * There are reported problems of some beta boards
+        * continously resetting.  For those boards, disable resetting.
+        */
+       if (ZOOM2_REVISION_PRODUCTION <= zoom2_get_revision())
+               twl4030_power_reset_init();
+
        return 0;
 }
 

diff --git a/drivers/power/Makefile b/drivers/power/Makefile
new file mode 100644 (file)
index 0000000..dd06514
--- /dev/null
+++ b/drivers/power/Makefile
@@ -0,0 +1,47 @@
+#
+# Copyright (c) 2009 Wind River Systems, Inc.
+# Tom Rix <Tom.Rix at windriver.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB    := $(obj)libpower.a
+
+COBJS-$(CONFIG_TWL4030_POWER)  += twl4030.o
+
+COBJS  := $(COBJS-y)
+SRCS   := $(COBJS:.o=.c)
+OBJS   := $(addprefix $(obj),$(COBJS))
+
+all:   $(LIB)
+
+$(LIB):        $(obj).depend $(OBJS)
+       $(AR) $(ARFLAGS) $@ $(OBJS)
+
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+########################################################################

diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c
new file mode 100644 (file)
index 0000000..70d4eeb
--- /dev/null
+++ b/drivers/power/twl4030.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix at windriver.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Derived from code on omapzoom, git://git.omapzoom.com/repo/u-boot.git
+ *
+ * Copyright (C) 2007-2009 Texas Instruments, Inc.
+ */
+
+#include <twl4030.h>
+
+/*
+ * Power Reset
+ */
+void twl4030_power_reset_init(void)
+{
+       u8 val = 0;
+       if (twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, &val,
+                               TWL4030_PM_MASTER_P1_SW_EVENTS)) {
+               printf("Error:TWL4030: failed to read the power register\n");
+               printf("Could not initialize hardware reset\n");
+       } else {
+               val |= TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON;
+               if (twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, val,
+                                        TWL4030_PM_MASTER_P1_SW_EVENTS)) {
+                       printf("Error:TWL4030: failed to write the power register\n");
+                       printf("Could not initialize hardware reset\n");
+               }
+       }
+}
+
+

diff --git a/include/configs/omap3_zoom1.h b/include/configs/omap3_zoom1.h
index 4034ea429147c681cb3e97bc4f706a9037e0a1a6..a4eb7fdf627b46b26fb5c944a0ff54f02857bd8d 100644 (file)
--- a/include/configs/omap3_zoom1.h
+++ b/include/configs/omap3_zoom1.h
@@ -125,6 +125,11 @@
 #define CONFIG_SYS_I2C_BUS_SELECT      1
 #define CONFIG_DRIVER_OMAP34XX_I2C     1
 
+/*
+ * TWL4030
+ */
+#define CONFIG_TWL4030_POWER           1
+
 /*
  * Board NAND Info.
  */

diff --git a/include/configs/omap3_zoom2.h b/include/configs/omap3_zoom2.h
index 701a296b3d129dfb1e5fd7df0631e01224299740..534eecdfe3afd0e092b2adcab7c4e2dcee0fa66e 100644 (file)
--- a/include/configs/omap3_zoom2.h
+++ b/include/configs/omap3_zoom2.h
@@ -146,6 +146,11 @@
 #define CONFIG_SYS_I2C_BUS_SELECT      1
 #define CONFIG_DRIVER_OMAP34XX_I2C     1
 
+/*
+ * TWL4030
+ */
+#define CONFIG_TWL4030_POWER           1
+
 /*
  * Board NAND Info.
  */

diff --git a/include/twl4030.h b/include/twl4030.h
index c304b54c572661af054acb3a79ad1b673334062b..e7c90b689f93970b4001a4f5368a3e5ea1007892 100644 (file)
--- a/include/twl4030.h
+++ b/include/twl4030.h
@@ -242,4 +242,7 @@ static inline int twl4030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
        return i2c_read(chip_no, reg, 1, val, 1);
 }
 
+/* For hardware resetting */
+void twl4030_power_reset_init(void);
+
 #endif /* TWL4030_H */