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drivers: i2c: add brcm iproc I2C driver support

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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>
This commit is contained in:
Rayagonda Kokatanur 2020-04-08 11:12:27 +05:30 • committed by Heiko Schocher
parent ce97607154
commit 956d57a8dd
4 changed files with 1057 additions and 0 deletions
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8
drivers/i2c/Kconfig
View file

@ -71,6 +71,14 @@ config SYS_I2C_AT91
i2c-gpio driver unless your system can cope with this limitation.
Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
config SYS_I2C_IPROC
bool "Broadcom I2C driver"
depends on DM_I2C
help
Broadcom I2C driver.
Add support for Broadcom I2C driver.
Say yes here to to enable the Broadco I2C driver.
config SYS_I2C_FSL
bool "Freescale I2C bus driver"
depends on DM_I2C

1
drivers/i2c/Makefile
View file

@ -21,6 +21,7 @@ obj-$(CONFIG_SYS_I2C_FSL) += fsl_i2c.o
obj-$(CONFIG_SYS_I2C_IHS) += ihs_i2c.o
obj-$(CONFIG_SYS_I2C_INTEL) += intel_i2c.o
obj-$(CONFIG_SYS_I2C_IMX_LPI2C) += imx_lpi2c.o
obj-$(CONFIG_SYS_I2C_IPROC) += iproc_i2c.o
obj-$(CONFIG_SYS_I2C_KONA) += kona_i2c.o
obj-$(CONFIG_SYS_I2C_LPC32XX) += lpc32xx_i2c.o
obj-$(CONFIG_SYS_I2C_MESON) += meson_i2c.o

713
drivers/i2c/iproc_i2c.c Normal file
View file

@ -0,0 +1,713 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Broadcom
*
*/
#include <asm/io.h>
#include <common.h>
#include <config.h>
#include <dm.h>
#include "errno.h"
#include <i2c.h>
#include "iproc_i2c.h"
DECLARE_GLOBAL_DATA_PTR;
struct iproc_i2c_regs {
u32 cfg_reg;
u32 timg_cfg;
u32 addr_reg;
u32 mstr_fifo_ctrl;
u32 slv_fifo_ctrl;
u32 bitbng_ctrl;
u32 blnks[6]; /* Not to be used */
u32 mstr_cmd;
u32 slv_cmd;
u32 evt_en;
u32 evt_sts;
u32 mstr_datawr;
u32 mstr_datard;
u32 slv_datawr;
u32 slv_datard;
};
struct iproc_i2c {
struct iproc_i2c_regs __iomem *base; /* register base */
int bus_speed;
int i2c_init_done;
};
/* Function to read a value from specified register. */
static unsigned int iproc_i2c_reg_read(u32 *reg_addr)
{
unsigned int val;
val = readl((void *)(reg_addr));
return cpu_to_le32(val);
}
/* Function to write a value ('val') in to a specified register. */
static int iproc_i2c_reg_write(u32 *reg_addr, unsigned int val)
{
val = cpu_to_le32(val);
writel(val, (void *)(reg_addr));
return 0;
}
#if defined(DEBUG)
static int iproc_dump_i2c_regs(struct iproc_i2c *bus_prvdata)
{
struct iproc_i2c_regs *base = bus_prvdata->base;
unsigned int regval;
debug("\n----------------------------------------------\n");
debug("%s: Dumping SMBus registers...\n", __func__);
regval = iproc_i2c_reg_read(&base->cfg_reg);
debug("CCB_SMB_CFG_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->timg_cfg);
debug("CCB_SMB_TIMGCFG_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->addr_reg);
debug("CCB_SMB_ADDR_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->mstr_fifo_ctrl);
debug("CCB_SMB_MSTRFIFOCTL_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->slv_fifo_ctrl);
debug("CCB_SMB_SLVFIFOCTL_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->bitbng_ctrl);
debug("CCB_SMB_BITBANGCTL_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->mstr_cmd);
debug("CCB_SMB_MSTRCMD_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->slv_cmd);
debug("CCB_SMB_SLVCMD_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->evt_en);
debug("CCB_SMB_EVTEN_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->evt_sts);
debug("CCB_SMB_EVTSTS_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->mstr_datawr);
debug("CCB_SMB_MSTRDATAWR_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->mstr_datard);
debug("CCB_SMB_MSTRDATARD_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->slv_datawr);
debug("CCB_SMB_SLVDATAWR_REG=0x%08X\n", regval);
regval = iproc_i2c_reg_read(&base->slv_datard);
debug("CCB_SMB_SLVDATARD_REG=0x%08X\n", regval);
debug("----------------------------------------------\n\n");
return 0;
}
#else
static int iproc_dump_i2c_regs(struct iproc_i2c *bus_prvdata)
{
return 0;
}
#endif
/*
* Function to ensure that the previous transaction was completed before
* initiating a new transaction. It can also be used in polling mode to
* check status of completion of a command
*/
static int iproc_i2c_startbusy_wait(struct iproc_i2c *bus_prvdata)
{
struct iproc_i2c_regs *base = bus_prvdata->base;
unsigned int regval;
regval = iproc_i2c_reg_read(&base->mstr_cmd);
/* Check if an operation is in progress. During probe it won't be.
* But when shutdown/remove was called we want to make sure that
* the transaction in progress completed
*/
if (regval & CCB_SMB_MSTRSTARTBUSYCMD_MASK) {
unsigned int i = 0;
do {
mdelay(10);
i++;
regval = iproc_i2c_reg_read(&base->mstr_cmd);
/* If start-busy bit cleared, exit the loop */
} while ((regval & CCB_SMB_MSTRSTARTBUSYCMD_MASK) &&
(i < IPROC_SMB_MAX_RETRIES));
if (i >= IPROC_SMB_MAX_RETRIES) {
pr_err("%s: START_BUSY bit didn't clear, exiting\n",
__func__);
return -ETIMEDOUT;
}
}
return 0;
}
/*
* This function set clock frequency for SMBus block. As per hardware
* engineering, the clock frequency can be changed dynamically.
*/
static int iproc_i2c_set_clk_freq(struct iproc_i2c *bus_prvdata)
{
struct iproc_i2c_regs *base = bus_prvdata->base;
unsigned int regval;
regval = iproc_i2c_reg_read(&base->timg_cfg);
switch (bus_prvdata->bus_speed) {
case I2C_SPEED_STANDARD_RATE:
regval &= ~CCB_SMB_TIMGCFG_MODE400_MASK;
break;
case I2C_SPEED_FAST_RATE:
regval |= CCB_SMB_TIMGCFG_MODE400_MASK;
break;
default:
return -EINVAL;
}
iproc_i2c_reg_write(&base->timg_cfg, regval);
return 0;
}
static int iproc_i2c_init(struct udevice *bus)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
struct iproc_i2c_regs *base = bus_prvdata->base;
unsigned int regval;
debug("\nEntering %s\n", __func__);
/* Put controller in reset */
regval = iproc_i2c_reg_read(&base->cfg_reg);
regval |= CCB_SMB_CFG_RST_MASK;
regval &= ~CCB_SMB_CFG_SMBEN_MASK;
iproc_i2c_reg_write(&base->cfg_reg, regval);
/* Wait 100 usec as per spec */
udelay(100);
/* bring controller out of reset */
regval &= ~CCB_SMB_CFG_RST_MASK;
iproc_i2c_reg_write(&base->cfg_reg, regval);
/* Flush Tx, Rx FIFOs. Note we are setting the Rx FIFO threshold to 0.
* May be OK since we are setting RX_EVENT and RX_FIFO_FULL interrupts
*/
regval = CCB_SMB_MSTRRXFIFOFLSH_MASK | CCB_SMB_MSTRTXFIFOFLSH_MASK;
iproc_i2c_reg_write(&base->mstr_fifo_ctrl, regval);
/* Enable SMbus block. Note, we are setting MASTER_RETRY_COUNT to zero
* since there will be only one master
*/
regval = iproc_i2c_reg_read(&base->cfg_reg);
regval |= CCB_SMB_CFG_SMBEN_MASK;
iproc_i2c_reg_write(&base->cfg_reg, regval);
/* Set default clock frequency */
iproc_i2c_set_clk_freq(bus_prvdata);
/* Disable intrs */
iproc_i2c_reg_write(&base->evt_en, 0);
/* Clear intrs (W1TC) */
regval = iproc_i2c_reg_read(&base->evt_sts);
iproc_i2c_reg_write(&base->evt_sts, regval);
bus_prvdata->i2c_init_done = 1;
iproc_dump_i2c_regs(bus_prvdata);
debug("%s: Init successful\n", __func__);
return 0;
}
/*
* This function copies data to SMBus's Tx FIFO. Valid for write transactions
* only
*
* base_addr: Mapped address of this SMBus instance
* dev_addr: SMBus (I2C) device address. We are assuming 7-bit addresses
* initially
* info: Data to copy in to Tx FIFO. For read commands, the size should be
* set to zero by the caller
*
*/
static void iproc_i2c_write_trans_data(struct iproc_i2c *bus_prvdata,
unsigned short dev_addr,
struct iproc_xact_info *info)
{
struct iproc_i2c_regs *base = bus_prvdata->base;
unsigned int regval;
unsigned int i;
unsigned int num_data_bytes = 0;
debug("%s: dev_addr=0x%X cmd_valid=%d cmd=0x%02x size=%u proto=%d buf[] %x\n",
__func__, dev_addr, info->cmd_valid,
info->command, info->size, info->smb_proto, info->data[0]);
/* Write SMBus device address first */
/* Note, we are assuming 7-bit addresses for now. For 10-bit addresses,
* we may have one more write to send the upper 3 bits of 10-bit addr
*/
iproc_i2c_reg_write(&base->mstr_datawr, dev_addr);
/* If the protocol needs command code, copy it */
if (info->cmd_valid)
iproc_i2c_reg_write(&base->mstr_datawr, info->command);
/* Depending on the SMBus protocol, we need to write additional
* transaction data in to Tx FIFO. Refer to section 5.5 of SMBus
* spec for sequence for a transaction
*/
switch (info->smb_proto) {
case SMBUS_PROT_RECV_BYTE:
/* No additional data to be written */
num_data_bytes = 0;
break;
case SMBUS_PROT_SEND_BYTE:
num_data_bytes = info->size;
break;
case SMBUS_PROT_RD_BYTE:
case SMBUS_PROT_RD_WORD:
case SMBUS_PROT_BLK_RD:
/* Write slave address with R/W~ set (bit #0) */
iproc_i2c_reg_write(&base->mstr_datawr,
dev_addr | 0x1);
num_data_bytes = 0;
break;
case SMBUS_PROT_BLK_WR_BLK_RD_PROC_CALL:
iproc_i2c_reg_write(&base->mstr_datawr,
dev_addr | 0x1 |
CCB_SMB_MSTRWRSTS_MASK);
num_data_bytes = 0;
break;
case SMBUS_PROT_WR_BYTE:
case SMBUS_PROT_WR_WORD:
/* No additional bytes to be written.
* Data portion is written in the
* 'for' loop below
*/
num_data_bytes = info->size;
break;
case SMBUS_PROT_BLK_WR:
/* 3rd byte is byte count */
iproc_i2c_reg_write(&base->mstr_datawr, info->size);
num_data_bytes = info->size;
break;
default:
return;
}
/* Copy actual data from caller, next. In general, for reads,
* no data is copied
*/
for (i = 0; num_data_bytes; --num_data_bytes, i++) {
/* For the last byte, set MASTER_WR_STATUS bit */
regval = (num_data_bytes == 1) ?
info->data[i] | CCB_SMB_MSTRWRSTS_MASK :
info->data[i];
iproc_i2c_reg_write(&base->mstr_datawr, regval);
}
}
static int iproc_i2c_data_send(struct iproc_i2c *bus_prvdata,
unsigned short addr,
struct iproc_xact_info *info)
{
struct iproc_i2c_regs *base = bus_prvdata->base;
int rc, retry = 3;
unsigned int regval;
/* Make sure the previous transaction completed */
rc = iproc_i2c_startbusy_wait(bus_prvdata);
if (rc < 0) {
pr_err("%s: Send: bus is busy, exiting\n", __func__);
return rc;
}
/* Write transaction bytes to Tx FIFO */
iproc_i2c_write_trans_data(bus_prvdata, addr, info);
/* Program master command register (0x30) with protocol type and set
* start_busy_command bit to initiate the write transaction
*/
regval = (info->smb_proto << CCB_SMB_MSTRSMBUSPROTO_SHIFT) |
CCB_SMB_MSTRSTARTBUSYCMD_MASK;
iproc_i2c_reg_write(&base->mstr_cmd, regval);
/* Check for Master status */
regval = iproc_i2c_reg_read(&base->mstr_cmd);
while (regval & CCB_SMB_MSTRSTARTBUSYCMD_MASK) {
mdelay(10);
if (retry-- <= 0)
break;
regval = iproc_i2c_reg_read(&base->mstr_cmd);
}
/* If start_busy bit cleared, check if there are any errors */
if (!(regval & CCB_SMB_MSTRSTARTBUSYCMD_MASK)) {
/* start_busy bit cleared, check master_status field now */
regval &= CCB_SMB_MSTRSTS_MASK;
regval >>= CCB_SMB_MSTRSTS_SHIFT;
if (regval != MSTR_STS_XACT_SUCCESS) {
/* Error We can flush Tx FIFO here */
pr_err("%s: ERROR: Error in transaction %u, exiting\n",
__func__, regval);
return -EREMOTEIO;
}
}
return 0;
}
static int iproc_i2c_data_recv(struct iproc_i2c *bus_prvdata,
unsigned short addr,
struct iproc_xact_info *info,
unsigned int *num_bytes_read)
{
struct iproc_i2c_regs *base = bus_prvdata->base;
int rc, retry = 3;
unsigned int regval;
/* Make sure the previous transaction completed */
rc = iproc_i2c_startbusy_wait(bus_prvdata);
if (rc < 0) {
pr_err("%s: Receive: Bus is busy, exiting\n", __func__);
return rc;
}
/* Program all transaction bytes into master Tx FIFO */
iproc_i2c_write_trans_data(bus_prvdata, addr, info);
/* Program master command register (0x30) with protocol type and set
* start_busy_command bit to initiate the write transaction
*/
regval = (info->smb_proto << CCB_SMB_MSTRSMBUSPROTO_SHIFT) |
CCB_SMB_MSTRSTARTBUSYCMD_MASK | info->size;
iproc_i2c_reg_write(&base->mstr_cmd, regval);
/* Check for Master status */
regval = iproc_i2c_reg_read(&base->mstr_cmd);
while (regval & CCB_SMB_MSTRSTARTBUSYCMD_MASK) {
udelay(1000);
if (retry-- <= 0)
break;
regval = iproc_i2c_reg_read(&base->mstr_cmd);
}
/* If start_busy bit cleared, check if there are any errors */
if (!(regval & CCB_SMB_MSTRSTARTBUSYCMD_MASK)) {
/* start_busy bit cleared, check master_status field now */
regval &= CCB_SMB_MSTRSTS_MASK;
regval >>= CCB_SMB_MSTRSTS_SHIFT;
if (regval != MSTR_STS_XACT_SUCCESS) {
/* We can flush Tx FIFO here */
pr_err("%s: Error in transaction %d, exiting\n",
__func__, regval);
return -EREMOTEIO;
}
}
/* Read received byte(s), after TX out address etc */
regval = iproc_i2c_reg_read(&base->mstr_datard);
/* For block read, protocol (hw) returns byte count,
* as the first byte
*/
if (info->smb_proto == SMBUS_PROT_BLK_RD) {
int i;
*num_bytes_read = regval & CCB_SMB_MSTRRDDATA_MASK;
/* Limit to reading a max of 32 bytes only; just a safeguard.
* If # bytes read is a number > 32, check transaction set up,
* and contact hw engg. Assumption: PEC is disabled
*/
for (i = 0;
(i < *num_bytes_read) && (i < I2C_SMBUS_BLOCK_MAX);
i++) {
/* Read Rx FIFO for data bytes */
regval = iproc_i2c_reg_read(&base->mstr_datard);
info->data[i] = regval & CCB_SMB_MSTRRDDATA_MASK;
}
} else {
/* 1 Byte data */
*info->data = regval & CCB_SMB_MSTRRDDATA_MASK;
*num_bytes_read = 1;
}
return 0;
}
static int i2c_write_byte(struct iproc_i2c *bus_prvdata,
u8 devaddr, u8 regoffset, u8 value)
{
int rc;
struct iproc_xact_info info;
devaddr <<= 1;
info.cmd_valid = 1;
info.command = (unsigned char)regoffset;
info.data = &value;
info.size = 1;
info.flags = 0;
info.smb_proto = SMBUS_PROT_WR_BYTE;
/* Refer to i2c_smbus_write_byte params passed. */
rc = iproc_i2c_data_send(bus_prvdata, devaddr, &info);
if (rc < 0) {
pr_err("%s: %s error accessing device 0x%X\n",
__func__, "Write", devaddr);
return -EREMOTEIO;
}
return 0;
}
int i2c_write(struct udevice *bus,
uchar chip, uint regaddr, int alen, uchar *buffer, int len)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
int i, data_len;
u8 *data;
if (len > 256) {
pr_err("I2C write: address out of range\n");
return 1;
}
if (len < 1) {
pr_err("I2C write: Need offset addr and value\n");
return 1;
}
/* buffer contains offset addr followed by value to be written */
regaddr = buffer[0];
data = &buffer[1];
data_len = len - 1;
for (i = 0; i < data_len; i++) {
if (i2c_write_byte(bus_prvdata, chip, regaddr + i, data[i])) {
pr_err("I2C write (%d): I/O error\n", i);
iproc_i2c_init(bus);
return 1;
}
}
return 0;
}
static int i2c_read_byte(struct iproc_i2c *bus_prvdata,
u8 devaddr, u8 regoffset, u8 *value)
{
int rc;
struct iproc_xact_info info;
unsigned int num_bytes_read = 0;
devaddr <<= 1;
info.cmd_valid = 1;
info.command = (unsigned char)regoffset;
info.data = value;
info.size = 1;
info.flags = 0;
info.smb_proto = SMBUS_PROT_RD_BYTE;
/* Refer to i2c_smbus_read_byte for params passed. */
rc = iproc_i2c_data_recv(bus_prvdata, devaddr, &info, &num_bytes_read);
if (rc < 0) {
pr_err("%s: %s error accessing device 0x%X\n",
__func__, "Read", devaddr);
return -EREMOTEIO;
}
return 0;
}
int i2c_read(struct udevice *bus,
uchar chip, uint addr, int alen, uchar *buffer, int len)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
int i;
if (len > 256) {
pr_err("I2C read: address out of range\n");
return 1;
}
for (i = 0; i < len; i++) {
if (i2c_read_byte(bus_prvdata, chip, addr + i, &buffer[i])) {
pr_err("I2C read: I/O error\n");
iproc_i2c_init(bus);
return 1;
}
}
return 0;
}
static int iproc_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
{
int ret = 0;
debug("%s: %d messages\n", __func__, nmsgs);
for (; nmsgs > 0; nmsgs--, msg++) {
if (msg->flags & I2C_M_RD)
ret = i2c_read(bus, msg->addr, 0, 0,
msg->buf, msg->len);
else
ret = i2c_write(bus, msg->addr, 0, 0,
msg->buf, msg->len);
}
return ret;
}
static int iproc_i2c_probe_chip(struct udevice *bus, uint chip_addr,
uint chip_flags)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
struct iproc_i2c_regs *base = bus_prvdata->base;
u32 regval;
debug("\n%s: Entering chip probe\n", __func__);
/* Init internal regs, disable intrs (and then clear intrs), set fifo
* thresholds, etc.
*/
if (!bus_prvdata->i2c_init_done)
iproc_i2c_init(bus);
regval = (chip_addr << 1);
iproc_i2c_reg_write(&base->mstr_datawr, regval);
regval = ((SMBUS_PROT_QUICK_CMD << CCB_SMB_MSTRSMBUSPROTO_SHIFT) |
(1 << CCB_SMB_MSTRSTARTBUSYCMD_SHIFT));
iproc_i2c_reg_write(&base->mstr_cmd, regval);
do {
udelay(100);
regval = iproc_i2c_reg_read(&base->mstr_cmd);
regval &= CCB_SMB_MSTRSTARTBUSYCMD_MASK;
} while (regval);
regval = iproc_i2c_reg_read(&base->mstr_cmd);
if ((regval & CCB_SMB_MSTRSTS_MASK) != 0)
return -1;
iproc_dump_i2c_regs(bus_prvdata);
debug("%s: chip probe successful\n", __func__);
return 0;
}
static int iproc_i2c_set_bus_speed(struct udevice *bus, unsigned int speed)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
bus_prvdata->bus_speed = speed;
return iproc_i2c_set_clk_freq(bus_prvdata);
}
/**
* i2c_get_bus_speed - get i2c bus speed
*
* This function returns the speed of operation in Hz
*/
int iproc_i2c_get_bus_speed(struct udevice *bus)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
struct iproc_i2c_regs *base = bus_prvdata->base;
unsigned int regval;
int ret = 0;
regval = iproc_i2c_reg_read(&base->timg_cfg);
regval = (regval & CCB_SMB_TIMGCFG_MODE400_MASK) >>
CCB_SMB_TIMGCFG_MODE400_SHIFT;
switch (regval) {
case 0:
ret = I2C_SPEED_STANDARD_RATE;
break;
case 1:
ret = I2C_SPEED_FAST_RATE;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int iproc_i2c_probe(struct udevice *bus)
{
return iproc_i2c_init(bus);
}
static int iproc_i2c_ofdata_to_platdata(struct udevice *bus)
{
struct iproc_i2c *bus_prvdata = dev_get_priv(bus);
int node = dev_of_offset(bus);
const void *blob = gd->fdt_blob;
bus_prvdata->base = map_physmem(devfdt_get_addr(bus),
sizeof(void *),
MAP_NOCACHE);
bus_prvdata->bus_speed =
fdtdec_get_int(blob, node, "bus-frequency",
I2C_SPEED_STANDARD_RATE);
return 0;
}
static const struct dm_i2c_ops iproc_i2c_ops = {
.xfer = iproc_i2c_xfer,
.probe_chip = iproc_i2c_probe_chip,
.set_bus_speed = iproc_i2c_set_bus_speed,
.get_bus_speed = iproc_i2c_get_bus_speed,
};
static const struct udevice_id iproc_i2c_ids[] = {
{ .compatible = "brcm,iproc-i2c" },
{ }
};
U_BOOT_DRIVER(iproc_i2c) = {
.name = "iproc_i2c",
.id = UCLASS_I2C,
.of_match = iproc_i2c_ids,
.ofdata_to_platdata = iproc_i2c_ofdata_to_platdata,
.probe = iproc_i2c_probe,
.priv_auto_alloc_size = sizeof(struct iproc_i2c),
.ops = &iproc_i2c_ops,
.flags = DM_FLAG_PRE_RELOC,
};

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/* 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__ */