driver: ppc: Add support for TI SN5S330.

This commit adds a basic driver for the TI SN5S330.  This driver just
sets up the IC and provides an API to turn on or off the PP2 FET.

BUG=b:67663166, b:67663124
BRANCH=None
TEST=Enable code for zoombini; Flash a board which has the SN5S330
stuffed; Verify that we're able to perform PD negotiation and negotiate
all the way up to 20V.
TEST=Boot only on AC.  sysjump to RW, verify that board does not
brownout.

Change-Id: I9c147ee8465eed878843cf902db301d62e8f627e
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/722104
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>

1 files changed, 117 insertions, 0 deletions

diff --git a/driver/ppc/sn5s330.h b/driver/ppc/sn5s330.h
new file mode 100644
index 0000000000..c4aa5fb81b
--- /dev/null
+++ b/driver/ppc/sn5s330.h
@@ -0,0 +1,117 @@
+/* Copyright 2017 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* TI SN5S330 Type-C Power Path Controller */
+
+#ifndef __CROS_EC_SN5S330_H
+#define __CROS_EC_SN5S330_H
+
+#include "common.h"
+
+struct sn5s330_config {
+	uint8_t i2c_port;
+	uint8_t i2c_addr;
+};
+
+extern const struct sn5s330_config sn5s330_chips[];
+extern const unsigned int sn5s330_cnt;
+
+/* Power Path Indices */
+enum sn5s330_pp_idx {
+	SN5S330_PP1,
+	SN5S330_PP2,
+	SN5S330_PP_COUNT,
+};
+
+#define SN5S330_ADDR0 0x80
+#define SN5S330_ADDR1 0x82
+#define SN5S330_ADDR2 0x84
+#define SN5S330_ADDR3 0x86
+
+#define SN5S330_FUNC_SET1  0x50
+#define SN5S330_FUNC_SET2  0x51
+#define SN5S330_FUNC_SET3  0x52
+#define SN5S330_FUNC_SET4  0x53
+#define SN5S330_FUNC_SET5  0x54
+#define SN5S330_FUNC_SET6  0x55
+#define SN5S330_FUNC_SET7  0x56
+#define SN5S330_FUNC_SET8  0x57
+#define SN5S330_FUNC_SET9  0x58
+#define SN5S330_FUNC_SET10 0x59
+#define SN5S330_FUNC_SET11 0x5A
+#define SN5S330_FUNC_SET12 0x5B
+
+#define SN5S330_INT_STATUS_REG1 0x2F
+#define SN5S330_INT_STATUS_REG2 0x30
+#define SN5S330_INT_STATUS_REG3 0x31
+#define SN5S330_INT_STATUS_REG4 0x32
+
+#define SN5S330_INT_TRIP_RISE_REG1 0x20
+#define SN5S330_INT_TRIP_RISE_REG2 0x21
+#define SN5S330_INT_TRIP_RISE_REG3 0x22
+#define SN5S330_INT_TRIP_FALL_REG1 0x23
+#define SN5S330_INT_TRIP_FALL_REG2 0x24
+#define SN5S330_INT_TRIP_FALL_REG3 0x25
+
+#define SN5S330_INT_MASK_RISE_REG1 0x26
+#define SN5S330_INT_MASK_RISE_REG2 0x27
+#define SN5S330_INT_MASK_RISE_REG3 0x28
+#define SN5S330_INT_MASK_FALL_REG1 0x29
+#define SN5S330_INT_MASK_FALL_REG2 0x2A
+#define SN5S330_INT_MASK_FALL_REG3 0x2B
+
+#define PPX_ILIM_DEGLITCH_0_US_20     0x1
+#define PPX_ILIM_DEGLITCH_0_US_50     0x2
+#define PPX_ILIM_DEGLITCH_0_US_100    0x3
+#define PPX_ILIM_DEGLITCH_0_US_200    0x4
+#define PPX_ILIM_DEGLITCH_0_US_1000   0x5
+#define PPX_ILIM_DEGLITCH_0_US_2000   0x6
+#define PPX_ILIM_DEGLITCH_0_US_10000  0x7
+
+/* Internal VBUS Switch Current Limit Settings (min) */
+#define SN5S330_ILIM_0_35  0
+#define SN5S330_ILIM_0_63  1
+#define SN5S330_ILIM_0_90  2
+#define SN5S330_ILIM_1_14  3
+#define SN5S330_ILIM_1_38  4
+#define SN5S330_ILIM_1_62  5
+#define SN5S330_ILIM_1_86  6
+#define SN5S330_ILIM_2_10  7
+#define SN5S330_ILIM_2_34  8
+#define SN5S330_ILIM_2_58  9
+#define SN5S330_ILIM_2_82  10
+#define SN5S330_ILIM_3_06  11
+#define SN5S330_ILIM_3_30  12
+
+/* FUNC_SET_2 */
+#define SN5S330_SBU_EN (1 << 4)
+
+/* FUNC_SET_3 */
+#define SN5S330_PP1_EN (1 << 0)
+#define SN5S330_PP2_EN (1 << 1)
+#define SN5S330_SET_RCP_MODE_PP1 (1 << 5)
+#define SN5S330_SET_RCP_MODE_PP2 (1 << 6)
+
+#define SN5S330_CC_EN (1 << 4)
+
+/* FUNC_SET_9 */
+#define SN5S330_PP2_CONFIG (1 << 2)
+#define SN5S330_OVP_EN_CC (1 << 4)
+
+/* INT_STATUS_REG4 */
+#define SN5S330_DB_BOOT (1 << 1)
+
+/**
+ * Turn on/off the PP1 or PP2 FET.
+ *
+ * @param chip_idx: The index into the sn5s330_chips[] table.
+ * @param pp: The power path index (PP1 or PP2).
+ * @param enable: 1 to turn on the FET, 0 to turn off.
+ * @return EC_SUCCESS on success,
+ *         otherwise if failed to enable the FET.
+ */
+int sn5s330_pp_fet_enable(uint8_t chip_idx, enum sn5s330_pp_idx pp, int enable);
+
+#endif /* defined(__CROS_EC_SN5S330_H) */