From cd7826359ee71e8f6f3d68331930ab9cbe1c990e Mon Sep 17 00:00:00 2001 From: Tom Rix Date: Sun, 28 Jun 2009 12:52:29 -0500 Subject: [PATCH] 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 Acked-by: Jean-Christophe PLAGNIOL-VILLARD Acked-by: Heiko Schocher --- Makefile | 1 + board/omap3/zoom1/zoom1.c | 9 +++++++ board/omap3/zoom2/zoom2.c | 14 +++++++++++ drivers/power/Makefile | 47 +++++++++++++++++++++++++++++++++++ drivers/power/twl4030.c | 47 +++++++++++++++++++++++++++++++++++ include/configs/omap3_zoom1.h | 5 ++++ include/configs/omap3_zoom2.h | 5 ++++ include/twl4030.h | 3 +++ 8 files changed, 131 insertions(+) create mode 100644 drivers/power/Makefile create mode 100644 drivers/power/twl4030.c diff --git a/Makefile b/Makefile index ef535ed88..55d33fdd8 100644 --- 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 db4d08709..94437d5be 100644 --- a/board/omap3/zoom1/zoom1.c +++ b/board/omap3/zoom1/zoom1.c @@ -31,6 +31,7 @@ * MA 02111-1307 USA */ #include +#include #include #include #include @@ -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 08fdafb64..d0fd55bfe 100644 --- a/board/omap3/zoom2/zoom2.c +++ b/board/omap3/zoom2/zoom2.c @@ -32,6 +32,7 @@ #ifdef CONFIG_STATUS_LED #include #endif +#include #include #include #include @@ -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 index 000000000..dd0651466 --- /dev/null +++ b/drivers/power/Makefile @@ -0,0 +1,47 @@ +# +# Copyright (c) 2009 Wind River Systems, Inc. +# Tom Rix +# +# 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 index 000000000..70d4eeb9d --- /dev/null +++ b/drivers/power/twl4030.c @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2009 Wind River Systems, Inc. + * Tom Rix + * + * 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 + +/* + * 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 4034ea429..a4eb7fdf6 100644 --- 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 701a296b3..534eecdfe 100644 --- 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 c304b54c5..e7c90b689 100644 --- 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 */