diff options
Diffstat (limited to 'arch/arm/cpu/armv7/u8500/prcmu.c')
| -rw-r--r-- | arch/arm/cpu/armv7/u8500/prcmu.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/arch/arm/cpu/armv7/u8500/prcmu.c b/arch/arm/cpu/armv7/u8500/prcmu.c deleted file mode 100644 index 26ffdc2e02..0000000000 --- a/arch/arm/cpu/armv7/u8500/prcmu.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * Copyright (C) 2009 ST-Ericsson SA - * - * Adapted from the Linux version: - * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * 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 PRCMU_I2C_WRITE(slave) \ - (((slave) << 1) | I2CWRITE | (1 << 6)) -#define PRCMU_I2C_READ(slave) \ - (((slave) << 1) | I2CREAD | (1 << 6)) - -#define I2C_MBOX_BIT (1 << 5) - -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_i2c_mbx_rdy(void) -{ - int timeout = 10000; - - if (readl(PRCM_ARM_IT1_VAL) & I2C_MBOX_BIT) { - printf("prcmu: warning i2c mailbox was not acked\n"); - /* clear mailbox 5 ack irq */ - writel(I2C_MBOX_BIT, PRCM_ARM_IT1_CLEAR); - } - - /* check any already on-going transaction */ - while ((readl(PRCM_MBOX_CPU_VAL) & I2C_MBOX_BIT) && timeout) - timeout--; - - if (timeout == 0) - return -1; - - return 0; -} - -static int wait_for_i2c_req_done(void) -{ - int timeout = 10000; - - /* Set an interrupt to XP70 */ - writel(I2C_MBOX_BIT, PRCM_MBOX_CPU_SET); - - /* wait for mailbox 5 (i2c) ack */ - while (!(readl(PRCM_ARM_IT1_VAL) & I2C_MBOX_BIT) && timeout) - timeout--; - - if (timeout == 0) - 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; - int ret; - - if (!prcmu_is_ready()) - return -1; - - debug("\nprcmu_4500_i2c_read:bank=%x;reg=%x;\n", - reg, slave); - - ret = wait_for_i2c_mbx_rdy(); - if (ret) { - printf("prcmu_i2c_read: mailbox became not ready\n"); - return ret; - } - - /* prepare the data for mailbox 5 */ - writeb(PRCMU_I2C_READ(reg), 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); - - ret = wait_for_i2c_req_done(); - if (ret) { - printf("prcmu_i2c_read: mailbox request timed out\n"); - return ret; - } - - /* 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); - /* clear mailbox 5 ack irq */ - writel(I2C_MBOX_BIT, PRCM_ARM_IT1_CLEAR); - - if (i2c_status == I2C_RD_OK) - return i2c_val; - - 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; - int ret; - - if (!prcmu_is_ready()) - return -1; - - debug("\nprcmu_4500_i2c_write:bank=%x;reg=%x;\n", - reg, slave); - - ret = wait_for_i2c_mbx_rdy(); - if (ret) { - printf("prcmu_i2c_write: mailbox became not ready\n"); - return ret; - } - - /* prepare the data for mailbox 5 */ - writeb(PRCMU_I2C_WRITE(reg), 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); - - ret = wait_for_i2c_req_done(); - if (ret) { - printf("prcmu_i2c_write: mailbox request timed out\n"); - return ret; - } - - /* 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); - /* clear mailbox 5 ack irq */ - writel(I2C_MBOX_BIT, PRCM_ARM_IT1_CLEAR); - - if (i2c_status == I2C_WR_OK) - return 0; - - printf("%s: i2c_status : 0x%x\n", __func__, i2c_status); - return -1; -} - -void u8500_prcmu_enable(u32 *reg) -{ - writel(readl(reg) | (1 << 8), reg); -} - -void db8500_prcmu_init(void) -{ - /* Enable timers */ - writel(1 << 17, PRCM_TCR); - - u8500_prcmu_enable((u32 *)PRCM_PER1CLK_MGT_REG); - u8500_prcmu_enable((u32 *)PRCM_PER2CLK_MGT_REG); - u8500_prcmu_enable((u32 *)PRCM_PER3CLK_MGT_REG); - /* PER4CLK does not exist */ - u8500_prcmu_enable((u32 *)PRCM_PER5CLK_MGT_REG); - u8500_prcmu_enable((u32 *)PRCM_PER6CLK_MGT_REG); - /* Only exists in ED but is always ok to write to */ - u8500_prcmu_enable((u32 *)PRCM_PER7CLK_MGT_REG); - - u8500_prcmu_enable((u32 *)PRCM_UARTCLK_MGT_REG); - u8500_prcmu_enable((u32 *)PRCM_I2CCLK_MGT_REG); - - u8500_prcmu_enable((u32 *)PRCM_SDMMCCLK_MGT_REG); - - /* Clean up the mailbox interrupts after pre-u-boot code. */ - writel(I2C_MBOX_BIT, PRCM_ARM_IT1_CLEAR); -} |
