platform/msm8x60/pmic.c

/*
 * * Copyright (c) 2010, Code Aurora Forum. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *  * Neither the name of Code Aurora Forum, Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <debug.h>
#include <reg.h>
#include <platform/iomap.h>
#include <platform/pmic.h>

typedef int (*pm8058_write_func) (unsigned char *, unsigned short,
                                  unsigned short);
extern int pa1_ssbi2_write_bytes(unsigned char *buffer, unsigned short length,
                                 unsigned short slave_addr);

/*PM8058*/
void pm8058_write_one(unsigned data, unsigned address)
{
    pm8058_write_func wr_function = &pa1_ssbi2_write_bytes;
    if (wr_function == NULL)
        return;
    if ((*wr_function) (&data, 1, address))
        dprintf(CRITICAL, "Error in initializing register\n");

}

/*PM8901*/
extern int pa2_ssbi2_write_bytes(unsigned char *buffer, unsigned short length,
                                 unsigned short slave_addr);
extern int pa2_ssbi2_read_bytes(unsigned char *buffer, unsigned short length,
                                unsigned short slave_addr);
/*
 * Write to the control registers on PMIC via the SSBI2 interface.
 * Returns : (0) on success and (-1) on error.
 */
int pm8901_write(uint8_t * buffer, uint32_t length, uint32_t slave_addr)
{
    return pa2_ssbi2_write_bytes(buffer, length, slave_addr);
}

/*
 * Read from the control registers on PMIC via the SSBI2 interface.
 * Returns : (0) on success and (-1) on error.
 */
int pm8901_read(uint8_t * buffer, uint32_t length, uint32_t slave_addr)
{
    return pa2_ssbi2_read_bytes(buffer, length, slave_addr);
}

/*
 * PMIC 8901 LDO vreg read.
 */
int pm8901_test_bank_read(uint8_t * buffer, uint8_t bank, uint16_t addr)
{
    int ret = pm8901_write(&bank, 1, addr);
    /* if the write does not work we can't read. */
    if (ret) {
        return ret;
    }

    return pm8901_read(buffer, 1, addr);
}

/*
 * PMIC 8901 LDO vreg write.
 */
int pm8901_vreg_write(uint8_t * buffer, uint8_t mask, uint16_t addr,
                      uint8_t prev_val)
{
    uint8_t reg;

    /* Clear the bits we want to try and set. */
    reg = (prev_val & ~mask);
    /* Set the bits we want to set, before writing them to addr */
    reg |= (*buffer & mask);
    return pm8901_write(&reg, 1, addr);
}