3 files changed, 258 insertions, 0 deletions
diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index f6a0879..22b57cc 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_P5020DS)		+= ics307_clk.o
 obj-$(CONFIG_P5040DS)		+= ics307_clk.o
 obj-$(CONFIG_VSC_CROSSBAR)    += vsc3316_3308.o
 obj-$(CONFIG_IDT8T49N222A)	+= idt8t49n222a_serdes_clk.o
+obj-$(CONFIG_ZM7300)		+= zm7300.o
 
 # deal with common files for P-series corenet based devices
 obj-$(CONFIG_P2041RDB)	+= p_corenet/
diff --git a/board/freescale/common/zm7300.c b/board/freescale/common/zm7300.c
new file mode 100644
index 0000000..be5953a
--- /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;
+}
+
diff --git a/board/freescale/common/zm7300.h b/board/freescale/common/zm7300.h
new file mode 100644
index 0000000..6b4d035
--- /dev/null
+++ b/board/freescale/common/zm7300.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __ZM7300_H_
+#define __ZM7300_H	1_
+
+#include <common.h>
+#include <i2c.h>
+#include <errno.h>
+#include <asm/io.h>
+
+#define ZM_STEP 125
+int zm7300_set_voltage(int voltage_1_10mv);
+int zm_write_voltage(int voltage);
+int zm_read_voltage(void);
+int zm_disable_wp(void);
+int zm_enable_wp(void);
+
+#endif	/* __ZM7300_H_ */