From: "Mathieu J. Poirier" mathieu.poirier@linaro.org
This is to allow the prcmu functions to be used by multiple u8500-based processors.
Signed-off-by: Mathieu Poirier mathieu.poirier@linaro.org Signed-off-by: John Rigby john.rigby@linaro.org --- Changes for v2: - Fixed white space errors. --- arch/arm/cpu/armv7/u8500/Makefile | 2 +- arch/arm/cpu/armv7/u8500/prcmu.c | 164 ++++++++++++++++++++++++++++++ arch/arm/include/asm/arch-u8500/prcmu.h | 55 ++++++++++ board/st-ericsson/u8500/Makefile | 2 +- board/st-ericsson/u8500/prcmu-fw.h | 55 ---------- board/st-ericsson/u8500/prcmu.c | 165 ------------------------------- board/st-ericsson/u8500/u8500_href.c | 2 +- 7 files changed, 222 insertions(+), 223 deletions(-)
diff --git a/arch/arm/cpu/armv7/u8500/Makefile b/arch/arm/cpu/armv7/u8500/Makefile index 270aa40..77accde 100644 --- a/arch/arm/cpu/armv7/u8500/Makefile +++ b/arch/arm/cpu/armv7/u8500/Makefile @@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o
-COBJS = timer.o clock.o +COBJS = timer.o clock.o prcmu.o SOBJS = lowlevel.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/u8500/prcmu.c b/arch/arm/cpu/armv7/u8500/prcmu.c new file mode 100644 index 0000000..b256d27 --- /dev/null +++ b/arch/arm/cpu/armv7/u8500/prcmu.c @@ -0,0 +1,164 @@ +/* + * Copyright (C) 2009 ST-Ericsson SA + * + * Adapted from the Linux version: + * Author: Kumar Sanghvi kumar.sanghvi@stericsson.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., 675 Mass Ave, Cambridge, MA 02139, USA. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + */ + +/* + * NOTE: This currently does not support the I2C workaround access method. + */ + +#include <common.h> +#include <config.h> +#include <asm/io.h> +#include <asm/arch/hardware.h> +#include <asm/types.h> +#include <asm/io.h> +#include <asm/errno.h> +#include <asm/arch/prcmu.h> + +/* CPU mailbox registers */ +#define PRCM_MBOX_CPU_VAL (U8500_PRCMU_BASE + 0x0fc) +#define PRCM_MBOX_CPU_SET (U8500_PRCMU_BASE + 0x100) +#define PRCM_MBOX_CPU_CLR (U8500_PRCMU_BASE + 0x104) + +static int prcmu_is_ready(void) +{ + int ready = readb(PRCM_XP70_CUR_PWR_STATE) == AP_EXECUTE; + if (!ready) + printf("PRCMU firmware not ready\n"); + return ready; +} + +static int _wait_for_req_complete(int num) +{ + int timeout = 1000; + + /* checking any already on-going transaction */ + while ((readl(PRCM_MBOX_CPU_VAL) & (1 << num)) && timeout) + timeout--; + + timeout = 1000; + + /* Set an interrupt to XP70 */ + writel(1 << num, PRCM_MBOX_CPU_SET); + + while ((readl(PRCM_MBOX_CPU_VAL) & (1 << num)) && timeout) + timeout--; + + if (!timeout) { + printf("PRCMU operation timed out\n"); + return -1; + } + + return 0; +} + +/** + * prcmu_i2c_read - PRCMU - 4500 communication using PRCMU I2C + * @reg: - db8500 register bank to be accessed + * @slave: - db8500 register to be accessed + * Returns: ACK_MB5 value containing the status + */ +int prcmu_i2c_read(u8 reg, u16 slave) +{ + uint8_t i2c_status; + uint8_t i2c_val; + + if (!prcmu_is_ready()) + return -1; + + debug("\nprcmu_4500_i2c_read:bank=%x;reg=%x;\n", + reg, slave); + + /* prepare the data for mailbox 5 */ + writeb((reg << 1) | I2CREAD, PRCM_REQ_MB5_I2COPTYPE_REG); + writeb((1 << 3) | 0x0, PRCM_REQ_MB5_BIT_FIELDS); + writeb(slave, PRCM_REQ_MB5_I2CSLAVE); + writeb(0, PRCM_REQ_MB5_I2CVAL); + + _wait_for_req_complete(REQ_MB5); + + /* retrieve values */ + debug("ack-mb5:transfer status = %x\n", + readb(PRCM_ACK_MB5_STATUS)); + debug("ack-mb5:reg bank = %x\n", readb(PRCM_ACK_MB5) >> 1); + debug("ack-mb5:slave_add = %x\n", + readb(PRCM_ACK_MB5_SLAVE)); + debug("ack-mb5:reg_val = %d\n", readb(PRCM_ACK_MB5_VAL)); + + i2c_status = readb(PRCM_ACK_MB5_STATUS); + i2c_val = readb(PRCM_ACK_MB5_VAL); + + if (i2c_status == I2C_RD_OK) + return i2c_val; + else { + + printf("prcmu_i2c_read:read return status= %d\n", + i2c_status); + return -1; + } + +} + +/** + * prcmu_i2c_write - PRCMU-db8500 communication using PRCMU I2C + * @reg: - db8500 register bank to be accessed + * @slave: - db800 register to be written to + * @reg_data: - the data to write + * Returns: ACK_MB5 value containing the status + */ +int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data) +{ + uint8_t i2c_status; + + if (!prcmu_is_ready()) + return -1; + + debug("\nprcmu_4500_i2c_write:bank=%x;reg=%x;\n", + reg, slave); + + /* prepare the data for mailbox 5 */ + writeb((reg << 1) | I2CWRITE, PRCM_REQ_MB5_I2COPTYPE_REG); + writeb((1 << 3) | 0x0, PRCM_REQ_MB5_BIT_FIELDS); + writeb(slave, PRCM_REQ_MB5_I2CSLAVE); + writeb(reg_data, PRCM_REQ_MB5_I2CVAL); + + debug("\ncpu_is_u8500v11\n"); + _wait_for_req_complete(REQ_MB5); + + /* retrieve values */ + debug("ack-mb5:transfer status = %x\n", + readb(PRCM_ACK_MB5_STATUS)); + debug("ack-mb5:reg bank = %x\n", readb(PRCM_ACK_MB5) >> 1); + debug("ack-mb5:slave_add = %x\n", + readb(PRCM_ACK_MB5_SLAVE)); + debug("ack-mb5:reg_val = %d\n", readb(PRCM_ACK_MB5_VAL)); + + i2c_status = readb(PRCM_ACK_MB5_STATUS); + debug("\ni2c_status = %x\n", i2c_status); + if (i2c_status == I2C_WR_OK) + return 0; + else { + printf("ape-i2c: i2c_status : 0x%x\n", i2c_status); + return -1; + } +} diff --git a/arch/arm/include/asm/arch-u8500/prcmu.h b/arch/arm/include/asm/arch-u8500/prcmu.h new file mode 100644 index 0000000..0836983 --- /dev/null +++ b/arch/arm/include/asm/arch-u8500/prcmu.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2009 ST-Ericsson SA + * + * Copied from the Linux version: + * Author: Kumar Sanghvi kumar.sanghvi@stericsson.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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#ifndef __MACH_PRCMU_FW_V1_H +#define __MACH_PRCMU_FW_V1_H + +#define AP_EXECUTE 2 +#define I2CREAD 1 +#define I2C_WR_OK 1 +#define I2C_RD_OK 2 +#define I2CWRITE 0 + +#define _PRCMU_TCDM_BASE U8500_PRCMU_TCDM_BASE +#define PRCM_XP70_CUR_PWR_STATE (_PRCMU_TCDM_BASE + 0xFFC) /* 4 BYTES */ + +#define PRCM_REQ_MB5 (_PRCMU_TCDM_BASE + 0xE44) /* 4 bytes */ +#define PRCM_ACK_MB5 (_PRCMU_TCDM_BASE + 0xDF4) /* 4 bytes */ + +/* Mailbox 5 Requests */ +#define PRCM_REQ_MB5_I2COPTYPE_REG (PRCM_REQ_MB5 + 0x0) +#define PRCM_REQ_MB5_BIT_FIELDS (PRCM_REQ_MB5 + 0x1) +#define PRCM_REQ_MB5_I2CSLAVE (PRCM_REQ_MB5 + 0x2) +#define PRCM_REQ_MB5_I2CVAL (PRCM_REQ_MB5 + 0x3) + +/* Mailbox 5 ACKs */ +#define PRCM_ACK_MB5_STATUS (PRCM_ACK_MB5 + 0x1) +#define PRCM_ACK_MB5_SLAVE (PRCM_ACK_MB5 + 0x2) +#define PRCM_ACK_MB5_VAL (PRCM_ACK_MB5 + 0x3) + +#define LOW_POWER_WAKEUP 1 +#define EXE_WAKEUP 0 + +#define REQ_MB5 5 + +extern int prcmu_i2c_read(u8 reg, u16 slave); +extern int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data); + +#endif /* __MACH_PRCMU_FW_V1_H */ diff --git a/board/st-ericsson/u8500/Makefile b/board/st-ericsson/u8500/Makefile index 4091a42..4ea2212 100644 --- a/board/st-ericsson/u8500/Makefile +++ b/board/st-ericsson/u8500/Makefile @@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk CFLAGS += -D__RELEASE -D__STN_8500 LIB = $(obj)lib$(BOARD).o
-COBJS := u8500_href.o gpio.o prcmu.o +COBJS := u8500_href.o gpio.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/board/st-ericsson/u8500/prcmu-fw.h b/board/st-ericsson/u8500/prcmu-fw.h deleted file mode 100644 index 0836983..0000000 --- a/board/st-ericsson/u8500/prcmu-fw.h +++ /dev/null @@ -1,55 +0,0 @@ -/* - * Copyright (C) 2009 ST-Ericsson SA - * - * Copied from the Linux version: - * Author: Kumar Sanghvi kumar.sanghvi@stericsson.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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#ifndef __MACH_PRCMU_FW_V1_H -#define __MACH_PRCMU_FW_V1_H - -#define AP_EXECUTE 2 -#define I2CREAD 1 -#define I2C_WR_OK 1 -#define I2C_RD_OK 2 -#define I2CWRITE 0 - -#define _PRCMU_TCDM_BASE U8500_PRCMU_TCDM_BASE -#define PRCM_XP70_CUR_PWR_STATE (_PRCMU_TCDM_BASE + 0xFFC) /* 4 BYTES */ - -#define PRCM_REQ_MB5 (_PRCMU_TCDM_BASE + 0xE44) /* 4 bytes */ -#define PRCM_ACK_MB5 (_PRCMU_TCDM_BASE + 0xDF4) /* 4 bytes */ - -/* Mailbox 5 Requests */ -#define PRCM_REQ_MB5_I2COPTYPE_REG (PRCM_REQ_MB5 + 0x0) -#define PRCM_REQ_MB5_BIT_FIELDS (PRCM_REQ_MB5 + 0x1) -#define PRCM_REQ_MB5_I2CSLAVE (PRCM_REQ_MB5 + 0x2) -#define PRCM_REQ_MB5_I2CVAL (PRCM_REQ_MB5 + 0x3) - -/* Mailbox 5 ACKs */ -#define PRCM_ACK_MB5_STATUS (PRCM_ACK_MB5 + 0x1) -#define PRCM_ACK_MB5_SLAVE (PRCM_ACK_MB5 + 0x2) -#define PRCM_ACK_MB5_VAL (PRCM_ACK_MB5 + 0x3) - -#define LOW_POWER_WAKEUP 1 -#define EXE_WAKEUP 0 - -#define REQ_MB5 5 - -extern int prcmu_i2c_read(u8 reg, u16 slave); -extern int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data); - -#endif /* __MACH_PRCMU_FW_V1_H */ diff --git a/board/st-ericsson/u8500/prcmu.c b/board/st-ericsson/u8500/prcmu.c deleted file mode 100644 index 6f9302f..0000000 --- a/board/st-ericsson/u8500/prcmu.c +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (C) 2009 ST-Ericsson SA - * - * Adapted from the Linux version: - * Author: Kumar Sanghvi kumar.sanghvi@stericsson.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., 675 Mass Ave, Cambridge, MA 02139, USA. - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - */ - -/* - * NOTE: This currently does not support the I2C workaround access method. - */ - -#include <common.h> -#include <config.h> -#include <asm/io.h> -#include <asm/arch/hardware.h> -#include <asm/types.h> -#include <asm/io.h> -#include <asm/errno.h> - -#include "prcmu-fw.h" - -/* CPU mailbox registers */ -#define PRCM_MBOX_CPU_VAL (U8500_PRCMU_BASE + 0x0fc) -#define PRCM_MBOX_CPU_SET (U8500_PRCMU_BASE + 0x100) -#define PRCM_MBOX_CPU_CLR (U8500_PRCMU_BASE + 0x104) - -static int prcmu_is_ready(void) -{ - int ready = readb(PRCM_XP70_CUR_PWR_STATE) == AP_EXECUTE; - if (!ready) - printf("PRCMU firmware not ready\n"); - return ready; -} - -static int _wait_for_req_complete(int num) -{ - int timeout = 1000; - - /* checking any already on-going transaction */ - while ((readl(PRCM_MBOX_CPU_VAL) & (1 << num)) && timeout--) - ; - - timeout = 1000; - - /* Set an interrupt to XP70 */ - writel(1 << num, PRCM_MBOX_CPU_SET); - - while ((readl(PRCM_MBOX_CPU_VAL) & (1 << num)) && timeout--) - ; - - if (!timeout) { - printf("PRCMU operation timed out\n"); - return -1; - } - - return 0; -} - -/** - * prcmu_i2c_read - PRCMU - 4500 communication using PRCMU I2C - * @reg: - db8500 register bank to be accessed - * @slave: - db8500 register to be accessed - * Returns: ACK_MB5 value containing the status - */ -int prcmu_i2c_read(u8 reg, u16 slave) -{ - uint8_t i2c_status; - uint8_t i2c_val; - - if (!prcmu_is_ready()) - return -1; - - debug("\nprcmu_4500_i2c_read:bank=%x;reg=%x;\n", - reg, slave); - - /* prepare the data for mailbox 5 */ - writeb((reg << 1) | I2CREAD, PRCM_REQ_MB5_I2COPTYPE_REG); - writeb((1 << 3) | 0x0, PRCM_REQ_MB5_BIT_FIELDS); - writeb(slave, PRCM_REQ_MB5_I2CSLAVE); - writeb(0, PRCM_REQ_MB5_I2CVAL); - - _wait_for_req_complete(REQ_MB5); - - /* retrieve values */ - debug("ack-mb5:transfer status = %x\n", - readb(PRCM_ACK_MB5_STATUS)); - debug("ack-mb5:reg bank = %x\n", readb(PRCM_ACK_MB5) >> 1); - debug("ack-mb5:slave_add = %x\n", - readb(PRCM_ACK_MB5_SLAVE)); - debug("ack-mb5:reg_val = %d\n", readb(PRCM_ACK_MB5_VAL)); - - i2c_status = readb(PRCM_ACK_MB5_STATUS); - i2c_val = readb(PRCM_ACK_MB5_VAL); - - if (i2c_status == I2C_RD_OK) - return i2c_val; - else { - - printf("prcmu_i2c_read:read return status= %d\n", - i2c_status); - return -1; - } - -} - -/** - * prcmu_i2c_write - PRCMU-db8500 communication using PRCMU I2C - * @reg: - db8500 register bank to be accessed - * @slave: - db800 register to be written to - * @reg_data: - the data to write - * Returns: ACK_MB5 value containing the status - */ -int prcmu_i2c_write(u8 reg, u16 slave, u8 reg_data) -{ - uint8_t i2c_status; - - if (!prcmu_is_ready()) - return -1; - - debug("\nprcmu_4500_i2c_write:bank=%x;reg=%x;\n", - reg, slave); - - /* prepare the data for mailbox 5 */ - writeb((reg << 1) | I2CWRITE, PRCM_REQ_MB5_I2COPTYPE_REG); - writeb((1 << 3) | 0x0, PRCM_REQ_MB5_BIT_FIELDS); - writeb(slave, PRCM_REQ_MB5_I2CSLAVE); - writeb(reg_data, PRCM_REQ_MB5_I2CVAL); - - debug("\ncpu_is_u8500v11\n"); - _wait_for_req_complete(REQ_MB5); - - /* retrieve values */ - debug("ack-mb5:transfer status = %x\n", - readb(PRCM_ACK_MB5_STATUS)); - debug("ack-mb5:reg bank = %x\n", readb(PRCM_ACK_MB5) >> 1); - debug("ack-mb5:slave_add = %x\n", - readb(PRCM_ACK_MB5_SLAVE)); - debug("ack-mb5:reg_val = %d\n", readb(PRCM_ACK_MB5_VAL)); - - i2c_status = readb(PRCM_ACK_MB5_STATUS); - debug("\ni2c_status = %x\n", i2c_status); - if (i2c_status == I2C_WR_OK) - return 0; - else { - printf("ape-i2c: i2c_status : 0x%x\n", i2c_status); - return -1; - } -} diff --git a/board/st-ericsson/u8500/u8500_href.c b/board/st-ericsson/u8500/u8500_href.c index 5f85fdc..6e3fc87 100644 --- a/board/st-ericsson/u8500/u8500_href.c +++ b/board/st-ericsson/u8500/u8500_href.c @@ -27,7 +27,7 @@ #include <asm/arch/hardware.h> #include <asm/arch/sys_proto.h> #ifdef CONFIG_MMC -#include "prcmu-fw.h" +#include <asm/arch/prcmu.h> #include "../../../drivers/mmc/arm_pl180_mmci.h" #endif