--- /dev/null
+/*
+ * Copyright (C) 2014 Lothar Waßmann <LW@KARO-electronics.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+#include "pmic.h"
+
+#define LTC3676_BUCK1 0x01
+#define LTC3676_BUCK2 0x02
+#define LTC3676_BUCK3 0x03
+#define LTC3676_BUCK4 0x04
+#define LTC3676_DVB1A 0x0A
+#define LTC3676_DVB1B 0x0B
+#define LTC3676_DVB2A 0x0C
+#define LTC3676_DVB2B 0x0D
+#define LTC3676_DVB3A 0x0E
+#define LTC3676_DVB3B 0x0F
+#define LTC3676_DVB4A 0x10
+#define LTC3676_DVB4B 0x11
+#define LTC3676_MSKPG 0x13
+#define LTC3676_CLIRQ 0x1f
+
+#define LTC3676_BUCK_DVDT_FAST (1 << 0)
+#define LTC3676_BUCK_KEEP_ALIVE (1 << 1)
+#define LTC3676_BUCK_CLK_RATE_LOW (1 << 2)
+#define LTC3676_BUCK_PHASE_SEL (1 << 3)
+#define LTC3676_BUCK_ENABLE_300 (1 << 4)
+#define LTC3676_BUCK_PULSE_SKIP (0 << 5)
+#define LTC3676_BUCK_BURST_MODE (1 << 5)
+#define LTC3676_BUCK_CONTINUOUS (2 << 5)
+#define LTC3676_BUCK_ENABLE (1 << 7)
+
+#define LTC3676_PGOOD_MASK (1 << 5)
+
+#define LTC3676_MSKPG_BUCK1 (1 << 0)
+#define LTC3676_MSKPG_BUCK2 (1 << 1)
+#define LTC3676_MSKPG_BUCK3 (1 << 2)
+#define LTC3676_MSKPG_BUCK4 (1 << 3)
+#define LTC3676_MSKPG_LDO2 (1 << 5)
+#define LTC3676_MSKPG_LDO3 (1 << 6)
+#define LTC3676_MSKPG_LDO4 (1 << 7)
+
+#define VDD_IO_VAL mV_to_regval(vout_to_vref(3300, 5))
+#define VDD_IO_VAL_LP mV_to_regval(vout_to_vref(3100, 5))
+#define VDD_IO_VAL_2 mV_to_regval(vout_to_vref(3300, 5_2))
+#define VDD_IO_VAL_2_LP mV_to_regval(vout_to_vref(3100, 5_2))
+#define VDD_SOC_VAL mV_to_regval(vout_to_vref(1425, 6))
+#define VDD_SOC_VAL_LP mV_to_regval(vout_to_vref(900, 6))
+#define VDD_DDR_VAL mV_to_regval(vout_to_vref(1500, 7))
+#define VDD_DDR_VAL_LP mV_to_regval(vout_to_vref(1500, 7))
+#define VDD_CORE_VAL mV_to_regval(vout_to_vref(1425, 8))
+#define VDD_CORE_VAL_LP mV_to_regval(vout_to_vref(900, 8))
+
+/* LDO1 */
+#define R1_1 470
+#define R2_1 150
+/* LDO4 */
+#define R1_4 470
+#define R2_4 150
+/* Buck1 */
+#define R1_5 390
+#define R2_5 110
+#define R1_5_2 470
+#define R2_5_2 150
+/* Buck2 (SOC) */
+#define R1_6 150
+#define R2_6 180
+/* Buck3 (DDR) */
+#define R1_7 150
+#define R2_7 140
+/* Buck4 (CORE) */
+#define R1_8 150
+#define R2_8 180
+
+/* calculate voltages in 10mV */
+#define R1(idx) R1_##idx
+#define R2(idx) R2_##idx
+
+#define v2r(v,n,m) DIV_ROUND(((((v) < (n)) ? (n) : (v)) - (n)), (m))
+#define r2v(r,n,m) (((r) * (m) + (n)) / 10)
+
+#define vout_to_vref(vout, idx) ((vout) * R2(idx) / (R1(idx) + R2(idx)))
+#define vref_to_vout(vref, idx) DIV_ROUND_UP((vref) * (R1(idx) + R2(idx)), R2(idx))
+
+#define mV_to_regval(mV) v2r((mV) * 10, 4125, 125)
+#define regval_to_mV(r) r2v(r, 4125, 125)
+
+static struct ltc3676_regs {
+ u8 addr;
+ u8 val;
+ u8 mask;
+} ltc3676_regs[] = {
+ { LTC3676_MSKPG, ~LTC3676_MSKPG_BUCK1, },
+ { LTC3676_DVB2B, VDD_SOC_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, },
+ { LTC3676_DVB3B, VDD_DDR_VAL_LP, ~0x3f, },
+ { LTC3676_DVB4B, VDD_CORE_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, },
+ { LTC3676_DVB2A, VDD_SOC_VAL, ~0x3f, },
+ { LTC3676_DVB3A, VDD_DDR_VAL, ~0x3f, },
+ { LTC3676_DVB4A, VDD_CORE_VAL, ~0x3f, },
+ { LTC3676_BUCK1, LTC3676_BUCK_BURST_MODE | LTC3676_BUCK_CLK_RATE_LOW, },
+ { LTC3676_BUCK2, LTC3676_BUCK_BURST_MODE, },
+ { LTC3676_BUCK3, LTC3676_BUCK_BURST_MODE, },
+ { LTC3676_BUCK4, LTC3676_BUCK_BURST_MODE, },
+ { LTC3676_CLIRQ, 0, }, /* clear interrupt status */
+};
+
+static struct ltc3676_regs ltc3676_regs_1[] = {
+ { LTC3676_DVB1B, VDD_IO_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, },
+ { LTC3676_DVB1A, VDD_IO_VAL, ~0x3f, },
+};
+
+static struct ltc3676_regs ltc3676_regs_2[] = {
+ { LTC3676_DVB1B, VDD_IO_VAL_2_LP | LTC3676_PGOOD_MASK, ~0x3f, },
+ { LTC3676_DVB1A, VDD_IO_VAL_2, ~0x3f, },
+};
+
+static int tx6_rev_2(void)
+{
+ struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
+ struct fuse_bank5_regs *fuse = (void *)ocotp->bank[5].fuse_regs;
+ u32 pad_settings = readl(&fuse->pad_settings);
+
+ debug("Fuse pad_settings @ %p = %02x\n",
+ &fuse->pad_settings, pad_settings);
+ return pad_settings & 1;
+}
+
+static int ltc3676_setup_regs(uchar slave_addr, struct ltc3676_regs *r,
+ size_t count)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < count; i++, r++) {
+#ifdef DEBUG
+ unsigned char value;
+
+ ret = i2c_read(slave_addr, r->addr, 1, &value, 1);
+ if ((value & ~r->mask) != r->val) {
+ printf("Changing PMIC reg %02x from %02x to %02x\n",
+ r->addr, value, r->val);
+ }
+ if (ret) {
+ printf("%s: failed to read PMIC register %02x: %d\n",
+ __func__, r->addr, ret);
+ return ret;
+ }
+#endif
+ ret = i2c_write(slave_addr, r->addr, 1, &r->val, 1);
+ if (ret) {
+ printf("%s: failed to write PMIC register %02x: %d\n",
+ __func__, r->addr, ret);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+int ltc3676_pmic_setup(uchar slave_addr)
+{
+ int ret;
+ unsigned char value;
+
+ ret = i2c_read(slave_addr, 0x11, 1, &value, 1);
+ if (ret) {
+ printf("%s: i2c_read error: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = ltc3676_setup_regs(slave_addr, ltc3676_regs,
+ ARRAY_SIZE(ltc3676_regs));
+ if (ret)
+ return ret;
+
+ ret = i2c_read(slave_addr, LTC3676_DVB4A, 1, &value, 1);
+ if (ret == 0) {
+ printf("VDDCORE set to %umV\n",
+ vref_to_vout(regval_to_mV(value), 8));
+ } else {
+ printf("Failed to read VDDCORE register setting\n");
+ }
+
+ ret = i2c_read(slave_addr, LTC3676_DVB2A, 1, &value, 1);
+ if (ret == 0) {
+ printf("VDDSOC set to %umV\n",
+ vref_to_vout(regval_to_mV(value), 6));
+ } else {
+ printf("Failed to read VDDSOC register setting\n");
+ }
+
+ if (tx6_rev_2()) {
+ ret = ltc3676_setup_regs(slave_addr, ltc3676_regs_2,
+ ARRAY_SIZE(ltc3676_regs_2));
+
+ ret = i2c_read(slave_addr, LTC3676_DVB1A, 1, &value, 1);
+ if (ret == 0) {
+ printf("VDDIO set to %umV\n",
+ vref_to_vout(regval_to_mV(value), 5_2));
+ } else {
+ printf("Failed to read VDDIO register setting\n");
+ }
+ } else {
+ ret = ltc3676_setup_regs(slave_addr, ltc3676_regs_1,
+ ARRAY_SIZE(ltc3676_regs_1));
+ }
+ return ret;
+}
projects / karo-tx-uboot.git / blobdiff