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Diffstat (limited to 'board/freescale/common/zm7300.c')
| -rw-r--r-- | board/freescale/common/zm7300.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/board/freescale/common/zm7300.c b/board/freescale/common/zm7300.c new file mode 100644 index 0000000000..be5953ad2d --- /dev/null +++ b/board/freescale/common/zm7300.c @@ -0,0 +1,235 @@ +/* + * Copyright 2013 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* Power-One ZM7300 DPM */ +#include "zm7300.h" + +#define DPM_WP 0x96 +#define WRP_OPCODE 0x01 +#define WRM_OPCODE 0x02 +#define RRP_OPCODE 0x11 + +#define DPM_SUCCESS 0x01 +#define DPM_EXEC_FAIL 0x00 + +static const uint16_t hex_to_1_10mv[] = { + 5000, + 5125, + 5250, + 5375, + 5500, + 5625, + 5750, + 5875, + 6000, + 6125, + 6250, + 6375, + 6500, + 6625, + 6750, + 6875, + 7000, + 7125, + 7250, + 7375, + 7500, + 7625, + 7750, + 7875, + 8000, + 8125, + 8250, + 8375, + 8500, + 8625, + 8750, + 8875, + 9000, + 9125, + 9250, + 9375, + 9500, /* 0.95mV */ + 9625, + 9750, + 9875, + 10000, /* 1.0V */ + 10125, + 10250, + 10375, + 10500, + 10625, + 10750, + 10875, + 11000, + 11125, + 11250, + 11375, + 11500, + 11625, + 11750, + 11875, + 12000, + 12125, + 12250, + 12375, + 0, /* reserved */ +}; + + +/* Read Data d from Register r of POL p */ +u8 dpm_rrp(uchar r) +{ + u8 ret[5]; + + ret[0] = RRP_OPCODE; + /* POL is 0 */ + ret[1] = 0; + ret[2] = r; + i2c_read(I2C_DPM_ADDR, 0, -3, ret, 2); + if (ret[1] == DPM_SUCCESS) { /* the DPM returned success as status */ + debug("RRP_OPCODE returned success data is %x\n", ret[0]); + return ret[0]; + } else { + return -1; + } +} + +/* Write Data d into DPM register r (RAM) */ +int dpm_wrm(u8 r, u8 d) +{ + u8 ret[5]; + + ret[0] = WRM_OPCODE; + ret[1] = r; + ret[2] = d; + i2c_read(I2C_DPM_ADDR, 0, -3, ret, 1); + if (ret[0] == DPM_SUCCESS) { /* the DPM returned success as status */ + debug("WRM_OPCODE returned success data is %x\n", ret[0]); + return ret[0]; + } else { + return -1; + } +} + +/* Write Data d into Register r of POL(s) a */ +int dpm_wrp(u8 r, u8 d) +{ + u8 ret[7]; + + ret[0] = WRP_OPCODE; + /* only POL0 is present */ + ret[1] = 0x01; + ret[2] = 0x00; + ret[3] = 0x00; + ret[4] = 0x00; + ret[5] = r; + ret[6] = d; + i2c_read(I2C_DPM_ADDR, 0, -7, ret, 1); + if (ret[0] == DPM_SUCCESS) { /* the DPM returned success as status */ + debug("WRP_OPCODE returned success data is %x\n", ret[0]); + return 0; + } else { + return -1; + } +} + +/* Uses the DPM command RRP */ +u8 zm_read(uchar reg) +{ + u8 d; + d = dpm_rrp(reg); + return d; +} + +/* ZM_write -- + Steps: + a. Write data to the register + b. Read data from register and compare to written value + c. Return return_code & voltage_read +*/ +u8 zm_write(u8 reg, u8 data) +{ + u8 d; + + /* write data to register */ + dpm_wrp(reg, data); + + /* read register and compare to written value */ + d = dpm_rrp(reg); + if (d != data) { + printf("zm_write : Comparison register data failed\n"); + return -1; + } + + return d; +} + +/* zm_write_out_voltage + * voltage in 1/10 mV + */ +int zm_write_voltage(int voltage) +{ + u8 reg = 0x7, vid; + uint16_t voltage_read; + u8 ret; + + vid = (voltage - 5000) / ZM_STEP; + + ret = zm_write(reg, vid); + if (ret != -1) { + voltage_read = hex_to_1_10mv[ret]; + debug("voltage set to %dmV\n", voltage_read/10); + return voltage_read; + } + return -1; +} + +/* zm_read_out_voltage + * voltage in 1/10 mV + */ +int zm_read_voltage(void) +{ + u8 reg = 0x7; + u8 ret; + int voltage; + + ret = zm_read(reg); + if (ret != -1) { + voltage = hex_to_1_10mv[ret]; + debug("Voltage read is %dmV\n", voltage/10); + return voltage; + } else { + return -1; + } +} + +int zm_disable_wp() +{ + u8 new_wp_value; + + /* Disable using Write-Protect register 0x96 */ + new_wp_value = 0x8; + if ((dpm_wrm(DPM_WP, new_wp_value)) < 0) { + printf("Disable Write-Protect register failed\n"); + return -1; + } + return 0; +} + +int zm_enable_wp() +{ + u8 orig_wp_value; + orig_wp_value = 0x0; + + /* Enable using Write-Protect register 0x96 */ + if ((dpm_wrm(DPM_WP, orig_wp_value)) < 0) { + printf("Enable Write-Protect register failed\n"); + return -1; + } + return 0; +} + |