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>
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__ */