drivers: i2c: add brcm iproc I2C driver support

Add I2C driver support for Broadcom iproc-based socs.

Signed-off-by: Arjun Jyothi <arjun.jyothi@broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com>
Signed-off-by: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>
Reviewed-by: Heiko Schocher <hs@denx.de>

1 files changed, 335 insertions, 0 deletions

diff --git a/drivers/i2c/iproc_i2c.h b/drivers/i2c/iproc_i2c.h
new file mode 100644
index 0000000..8c3d84f
--- /dev/null
+++ b/drivers/i2c/iproc_i2c.h
@@ -0,0 +1,335 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Broadcom
+ *
+ */
+
+#ifndef __IPROC_I2C_H__
+#define __IPROC_I2C_H__
+
+/* Registers */
+#define CCB_SMB_CFG_REG 0x0
+
+#define CCB_SMB_CFG_RST_MASK                         0x80000000
+#define CCB_SMB_CFG_RST_SHIFT                        31
+
+#define CCB_SMB_CFG_SMBEN_MASK                       0x40000000
+#define CCB_SMB_CFG_SMBEN_SHIFT                      30
+
+#define CCB_SMB_CFG_BITBANGEN_MASK                   0x20000000
+#define CCB_SMB_CFG_BITBANGEN_SHIFT                  29
+
+#define CCB_SMB_CFG_EN_NIC_SMBADDR0_MASK             0x10000000
+#define CCB_SMB_CFG_EN_NIC_SMBADDR0_SHIFT            28
+
+#define CCB_SMB_CFG_PROMISCMODE_MASK                 0x08000000
+#define CCB_SMB_CFG_PROMISCMODE_SHIFT                27
+
+#define CCB_SMB_CFG_TSTMPCNTEN_MASK                  0x04000000
+#define CCB_SMB_CFG_TSTMPCNTEN_SHIFT                 26
+
+#define CCB_SMB_CFG_MSTRRTRYCNT_MASK                 0x000F0000
+#define CCB_SMB_CFG_MSTRRTRYCNT_SHIFT                16
+
+#define CCB_SMB_TIMGCFG_REG 0x4
+
+#define CCB_SMB_TIMGCFG_MODE400_MASK                 0x80000000
+#define CCB_SMB_TIMGCFG_MODE400_SHIFT                31
+
+#define CCB_SMB_TIMGCFG_RNDSLVSTR_MASK               0x7F000000
+#define CCB_SMB_TIMGCFG_RNDSLVSTR_SHIFT              24
+
+#define CCB_SMB_TIMGCFG_PERSLVSTR_MASK               0x00FF0000
+#define CCB_SMB_TIMGCFG_PERSLVSTR_SHIFT              16
+
+#define CCB_SMB_TIMGCFG_IDLTIME_MASK                 0x0000FF00
+#define CCB_SMB_TIMGCFG_IDLTIME_SHIFT                8
+
+#define CCB_SMB_ADDR_REG 0x8
+
+#define CCB_SMB_EN_NIC_SMBADDR3_MASK                 0x80000000
+#define CCB_SMB_EN_NIC_SMBADDR3_SHIFT                31
+
+#define CCB_SMB_NIC_SMBADDR3_MASK                    0x7F000000
+#define CCB_SMB_NIC_SMBADDR3_SHIFT                   24
+
+#define CCB_SMB_EN_NIC_SMBADDR2_MASK                 0x00800000
+#define CCB_SMB_EN_NIC_SMBADDR2_SHIFT                23
+
+#define CCB_SMB_NIC_SMBADDR2_MASK                    0x007F0000
+#define CCB_SMB_NIC_SMBADDR2_SHIFT                   16
+
+#define CCB_SMB_EN_NIC_SMBADDR1_MASK                 0x00008000
+#define CCB_SMB_EN_NIC_SMBADDR1_SHIFT                15
+
+#define CCB_SMB_NIC_SMBADDR1_MASK                    0x00007F00
+#define CCB_SMB_NIC_SMBADDR1_SHIFT                   8
+
+#define CCB_SMB_EN_NIC_SMBADDR0_MASK                 0x00000080
+#define CCB_SMB_EN_NIC_SMBADDR0_SHIFT                7
+
+#define CCB_SMB_NIC_SMBADDR0_MASK                    0x0000007F
+#define CCB_SMB_NIC_SMBADDR0_SHIFT                   0
+
+#define CCB_SMB_MSTRFIFOCTL_REG 0xC
+
+#define CCB_SMB_MSTRRXFIFOFLSH_MASK                  0x80000000
+#define CCB_SMB_MSTRRXFIFOFLSH_SHIFT                 31
+
+#define CCB_SMB_MSTRTXFIFOFLSH_MASK                  0x40000000
+#define CCB_SMB_MSTRTXFIFOFLSH_SHIFT                 30
+
+#define CCB_SMB_MSTRRXPKTCNT_MASK                    0x007F0000
+#define CCB_SMB_MSTRRXPKTCNT_SHIFT                   16
+
+#define CCB_SMB_MSTRRXFIFOTHR_MASK                   0x00003F00
+#define CCB_SMB_MSTRRXFIFOTHR_SHIFT                  8
+
+#define CCB_SMB_SLVFIFOCTL_REG 0x10
+
+#define CCB_SMB_SLVRXFIFOFLSH_MASK                   0x80000000
+#define CCB_SMB_SLVRXFIFOFLSH_SHIFT                  31
+
+#define CCB_SMB_SLVTXFIFOFLSH_MASK                   0x40000000
+#define CCB_SMB_SLVTXFIFOFLSH_SHIFT                  30
+
+#define CCB_SMB_SLVRXPKTCNT_MASK                     0x007F0000
+#define CCB_SMB_SLVRXPKTCNT_SHIFT                    16
+
+#define CCB_SMB_SLVRXFIFOTHR_MASK                    0x00003F00
+#define CCB_SMB_SLVRXFIFOTHR_SHIFT                   8
+
+#define CCB_SMB_BITBANGCTL_REG 0x14
+
+#define CCB_SMB_SMBCLKIN_MASK                        0x80000000
+#define CCB_SMB_SMBCLKIN_SHIFT                       31
+
+#define CCB_SMB_SMBCLKOUTEN_MASK                     0x40000000
+#define CCB_SMB_SMBCLKOUTEN_SHIFT                    30
+
+#define CCB_SMB_SMBDATAIN_MASK                       0x20000000
+#define CCB_SMB_SMBDATAIN_SHIFT                      29
+
+#define CCB_SMB_SMBDATAOUTEN_MASK                    0x10000000
+#define CCB_SMB_SMBDATAOUTEN_SHIFT                   28
+
+#define CCB_SMB_MSTRCMD_REG 0x30
+
+#define CCB_SMB_MSTRSTARTBUSYCMD_MASK                0x80000000
+#define CCB_SMB_MSTRSTARTBUSYCMD_SHIFT               31
+
+#define CCB_SMB_MSTRABORT_MASK                       0x40000000
+#define CCB_SMB_MSTRABORT_SHIFT                      30
+
+#define CCB_SMB_MSTRSTS_MASK                         0x0E000000
+#define CCB_SMB_MSTRSTS_SHIFT                        25
+
+#define CCB_SMB_MSTRSMBUSPROTO_MASK                  0x00001E00
+#define CCB_SMB_MSTRSMBUSPROTO_SHIFT                 9
+
+#define CCB_SMB_MSTRPEC_MASK                         0x00000100
+#define CCB_SMB_MSTRPEC_SHIFT                        8
+
+#define CCB_SMB_MSTRRDBYTECNT_MASK                   0x000000FF
+#define CCB_SMB_MSTRRDBYTECNT_SHIFT                  0
+
+#define CCB_SMB_SLVCMD_REG 0x34
+
+#define CCB_SMB_SLVSTARTBUSYCMD_MASK                 0x80000000
+#define CCB_SMB_SLVSTARTBUSYCMD_SHIFT                31
+
+#define CCB_SMB_SLVABORT_MASK                        0x40000000
+#define CCB_SMB_SLVABORT_SHIFT                       30
+
+#define CCB_SMB_SLVSTS_MASK                          0x03800000
+#define CCB_SMB_SLVSTS_SHIFT                         23
+
+#define CCB_SMB_SLVPEC_MASK                          0x00000100
+#define CCB_SMB_SLVPEC_SHIFT                         8
+
+#define CCB_SMB_EVTEN_REG 0x38
+
+#define CCB_SMB_MSTRRXFIFOFULLEN_MASK                0x80000000
+#define CCB_SMB_MSTRRXFIFOFULLEN_SHIFT               31
+
+#define CCB_SMB_MSTRRXFIFOTHRHITEN_MASK              0x40000000
+#define CCB_SMB_MSTRRXFIFOTHRHITEN_SHIFT             30
+
+#define CCB_SMB_MSTRRXEVTEN_MASK                     0x20000000
+#define CCB_SMB_MSTRRXEVTEN_SHIFT                    29
+
+#define CCB_SMB_MSTRSTARTBUSYEN_MASK                 0x10000000
+#define CCB_SMB_MSTRSTARTBUSYEN_SHIFT                28
+
+#define CCB_SMB_MSTRTXUNDEN_MASK                     0x08000000
+#define CCB_SMB_MSTRTXUNDEN_SHIFT                    27
+
+#define CCB_SMB_SLVRXFIFOFULLEN_MASK                 0x04000000
+#define CCB_SMB_SLVRXFIFOFULLEN_SHIFT                26
+
+#define CCB_SMB_SLVRXFIFOTHRHITEN_MASK               0x02000000
+#define CCB_SMB_SLVRXFIFOTHRHITEN_SHIFT              25
+
+#define CCB_SMB_SLVRXEVTEN_MASK                      0x01000000
+#define CCB_SMB_SLVRXEVTEN_SHIFT                     24
+
+#define CCB_SMB_SLVSTARTBUSYEN_MASK                  0x00800000
+#define CCB_SMB_SLVSTARTBUSYEN_SHIFT                 23
+
+#define CCB_SMB_SLVTXUNDEN_MASK                      0x00400000
+#define CCB_SMB_SLVTXUNDEN_SHIFT                     22
+
+#define CCB_SMB_SLVRDEVTEN_MASK                      0x00200000
+#define CCB_SMB_SLVRDEVTEN_SHIFT                     21
+
+#define CCB_SMB_EVTSTS_REG 0x3C
+
+#define CCB_SMB_MSTRRXFIFOFULLSTS_MASK               0x80000000
+#define CCB_SMB_MSTRRXFIFOFULLSTS_SHIFT              31
+
+#define CCB_SMB_MSTRRXFIFOTHRHITSTS_MASK             0x40000000
+#define CCB_SMB_MSTRRXFIFOTHRHITSTS_SHIFT            30
+
+#define CCB_SMB_MSTRRXEVTSTS_MASK                    0x20000000
+#define CCB_SMB_MSTRRXEVTSTS_SHIFT                   29
+
+#define CCB_SMB_MSTRSTARTBUSYSTS_MASK                0x10000000
+#define CCB_SMB_MSTRSTARTBUSYSTS_SHIFT               28
+
+#define CCB_SMB_MSTRTXUNDSTS_MASK                    0x08000000
+#define CCB_SMB_MSTRTXUNDSTS_SHIFT                   27
+
+#define CCB_SMB_SLVRXFIFOFULLSTS_MASK                0x04000000
+#define CCB_SMB_SLVRXFIFOFULLSTS_SHIFT               26
+
+#define CCB_SMB_SLVRXFIFOTHRHITSTS_MASK              0x02000000
+#define CCB_SMB_SLVRXFIFOTHRHITSTS_SHIFT             25
+
+#define CCB_SMB_SLVRXEVTSTS_MASK                     0x01000000
+#define CCB_SMB_SLVRXEVTSTS_SHIFT                    24
+
+#define CCB_SMB_SLVSTARTBUSYSTS_MASK                 0x00800000
+#define CCB_SMB_SLVSTARTBUSYSTS_SHIFT                23
+
+#define CCB_SMB_SLVTXUNDSTS_MASK                     0x00400000
+#define CCB_SMB_SLVTXUNDSTS_SHIFT                    22
+
+#define CCB_SMB_SLVRDEVTSTS_MASK                     0x00200000
+#define CCB_SMB_SLVRDEVTSTS_SHIFT                    21
+
+#define CCB_SMB_MSTRDATAWR_REG 0x40
+
+#define CCB_SMB_MSTRWRSTS_MASK                       0x80000000
+#define CCB_SMB_MSTRWRSTS_SHIFT                      31
+
+#define CCB_SMB_MSTRWRDATA_MASK                      0x000000FF
+#define CCB_SMB_MSTRWRDATA_SHIFT                     0
+
+#define CCB_SMB_MSTRDATARD_REG 0x44
+
+#define CCB_SMB_MSTRRDSTS_MASK                       0xC0000000
+#define CCB_SMB_MSTRRDSTS_SHIFT                      30
+
+#define CCB_SMB_MSTRRDPECERR_MASK                    0x20000000
+#define CCB_SMB_MSTRRDPECERR_SHIFT                   29
+
+#define CCB_SMB_MSTRRDDATA_MASK                      0x000000FF
+#define CCB_SMB_MSTRRDDATA_SHIFT                     0
+
+#define CCB_SMB_SLVDATAWR_REG 0x48
+
+#define CCB_SMB_SLVWRSTS_MASK                        0x80000000
+#define CCB_SMB_SLVWRSTS_SHIFT                       31
+
+#define CCB_SMB_SLVWRDATA_MASK                       0x000000FF
+#define CCB_SMB_SLVWRDATA_SHIFT                      0
+
+#define CCB_SMB_SLVDATARD_REG 0x4C
+
+#define CCB_SMB_SLVRDSTS_MASK                        0xC0000000
+#define CCB_SMB_SLVRDSTS_SHIFT                       30
+
+#define CCB_SMB_SLVRDERRSTS_MASK                     0x30000000
+#define CCB_SMB_SLVRDERRSTS_SHIFT                    28
+
+#define CCB_SMB_SLVRDDATA_MASK                       0x000000FF
+#define CCB_SMB_SLVRDDATA_SHIFT                      0
+
+/* --Registers-- */
+
+/* Transaction error codes defined in Master command register (0x30) */
+#define MSTR_STS_XACT_SUCCESS          0
+#define MSTR_STS_LOST_ARB              1
+#define MSTR_STS_NACK_FIRST_BYTE       2
+
+/* NACK on a byte other than
+ * the first byte
+ */
+#define MSTR_STS_NACK_NON_FIRST_BYTE   3
+
+#define MSTR_STS_TTIMEOUT_EXCEEDED     4
+#define MSTR_STS_TX_TLOW_MEXT_EXCEEDED 5
+#define MSTR_STS_RX_TLOW_MEXT_EXCEEDED 6
+
+/* SMBUS protocol values defined in register 0x30 */
+#define SMBUS_PROT_QUICK_CMD               0
+#define SMBUS_PROT_SEND_BYTE               1
+#define SMBUS_PROT_RECV_BYTE               2
+#define SMBUS_PROT_WR_BYTE                 3
+#define SMBUS_PROT_RD_BYTE                 4
+#define SMBUS_PROT_WR_WORD                 5
+#define SMBUS_PROT_RD_WORD                 6
+#define SMBUS_PROT_BLK_WR                  7
+#define SMBUS_PROT_BLK_RD                  8
+#define SMBUS_PROT_PROC_CALL               9
+#define SMBUS_PROT_BLK_WR_BLK_RD_PROC_CALL 10
+
+/* SMBUS Block speed mode */
+#define SMBUS_BLOCK_MODE_100		0
+#define SMBUS_BLOCK_MODE_400		1
+
+#define BUS_BUSY_COUNT         100000 /* Number can be changed later */
+#define IPROC_I2C_INVALID_ADDR 0xFF
+#define IPROC_SMB_MAX_RETRIES   35
+#define I2C_SMBUS_BLOCK_MAX     32
+#define GETREGFLDVAL(regval, mask, startbit) \
+		    (((regval) & (mask)) >> (startbit))
+
+/* This enum will be used to notify the user of status of a data transfer
+ * request
+ */
+enum iproc_smb_error_code {
+	I2C_NO_ERR = 0,
+	I2C_TIMEOUT_ERR = 1,
+
+	/* Invalid parameter(s) passed to the driver */
+	I2C_INVALID_PARAM_ERR = 2,
+
+	/* The driver API was called before the present
+	 * transfer was completed
+	 */
+	I2C_OPER_IN_PROGRESS = 3,
+
+	/* Transfer aborted unexpectedly, for example a NACK
+	 * received, before last byte was read/written
+	 */
+	I2C_OPER_ABORT_ERR = 4,
+
+	/* Feature or function not supported
+	 * (e.g., 10-bit addresses, or clock speeds
+	 * other than 100KHz, 400KHz)
+	 */
+	I2C_FUNC_NOT_SUPPORTED = 5,
+};
+
+/* Structure used to pass information to read/write functions. */
+struct iproc_xact_info {
+	unsigned char command;
+	unsigned char *data;
+	unsigned int size;
+	unsigned short flags; /* used for specifying PEC, 10-bit addresses */
+	unsigned char smb_proto; /* SMBus protocol */
+	unsigned int cmd_valid; /* true if command is valid else false */
+};
+
+#endif /* __IPROC_I2C_H__ */