// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
// Copyright (c) 2017-2022 Linaro Limited.
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#define CCI_HW_VERSION 0 x0
#define CCI_RESET_CMD 0 x004
#define CCI_RESET_CMD_MASK 0 x0f73f3f7
#define CCI_RESET_CMD_M0_MASK 0 x000003f1
#define CCI_RESET_CMD_M1_MASK 0 x0003f001
#define CCI_QUEUE_START 0 x008
#define CCI_HALT_REQ 0 x034
#define CCI_HALT_REQ_I2C_M0_Q0Q1 BIT(0 )
#define CCI_HALT_REQ_I2C_M1_Q0Q1 BIT(1 )
#define CCI_I2C_Mm_SCL_CTL(m) (0 x100 + 0 x100 * (m))
#define CCI_I2C_Mm_SDA_CTL_0(m) (0 x104 + 0 x100 * (m))
#define CCI_I2C_Mm_SDA_CTL_1(m) (0 x108 + 0 x100 * (m))
#define CCI_I2C_Mm_SDA_CTL_2(m) (0 x10c + 0 x100 * (m))
#define CCI_I2C_Mm_MISC_CTL(m) (0 x110 + 0 x100 * (m))
#define CCI_I2C_Mm_READ_DATA(m) (0 x118 + 0 x100 * (m))
#define CCI_I2C_Mm_READ_BUF_LEVEL(m) (0 x11c + 0 x100 * (m))
#define CCI_I2C_Mm_Qn_EXEC_WORD_CNT(m, n) (0 x300 + 0 x200 * (m) + 0 x100 * (n))
#define CCI_I2C_Mm_Qn_CUR_WORD_CNT(m, n) (0 x304 + 0 x200 * (m) + 0 x100 * (n))
#define CCI_I2C_Mm_Qn_CUR_CMD(m, n) (0 x308 + 0 x200 * (m) + 0 x100 * (n))
#define CCI_I2C_Mm_Qn_REPORT_STATUS(m, n) (0 x30c + 0 x200 * (m) + 0 x100 * (n))
#define CCI_I2C_Mm_Qn_LOAD_DATA(m, n) (0 x310 + 0 x200 * (m) + 0 x100 * (n))
#define CCI_IRQ_GLOBAL_CLEAR_CMD 0 xc00
#define CCI_IRQ_MASK_0 0 xc04
#define CCI_IRQ_MASK_0_I2C_M0_RD_DONE BIT(0 )
#define CCI_IRQ_MASK_0_I2C_M0_Q0_REPORT BIT(4 )
#define CCI_IRQ_MASK_0_I2C_M0_Q1_REPORT BIT(8 )
#define CCI_IRQ_MASK_0_I2C_M1_RD_DONE BIT(12 )
#define CCI_IRQ_MASK_0_I2C_M1_Q0_REPORT BIT(16 )
#define CCI_IRQ_MASK_0_I2C_M1_Q1_REPORT BIT(20 )
#define CCI_IRQ_MASK_0_RST_DONE_ACK BIT(24 )
#define CCI_IRQ_MASK_0_I2C_M0_Q0Q1_HALT_ACK BIT(25 )
#define CCI_IRQ_MASK_0_I2C_M1_Q0Q1_HALT_ACK BIT(26 )
#define CCI_IRQ_MASK_0_I2C_M0_ERROR 0 x18000ee6
#define CCI_IRQ_MASK_0_I2C_M1_ERROR 0 x60ee6000
#define CCI_IRQ_CLEAR_0 0 xc08
#define CCI_IRQ_STATUS_0 0 xc0c
#define CCI_IRQ_STATUS_0_I2C_M0_RD_DONE BIT(0 )
#define CCI_IRQ_STATUS_0_I2C_M0_Q0_REPORT BIT(4 )
#define CCI_IRQ_STATUS_0_I2C_M0_Q1_REPORT BIT(8 )
#define CCI_IRQ_STATUS_0_I2C_M1_RD_DONE BIT(12 )
#define CCI_IRQ_STATUS_0_I2C_M1_Q0_REPORT BIT(16 )
#define CCI_IRQ_STATUS_0_I2C_M1_Q1_REPORT BIT(20 )
#define CCI_IRQ_STATUS_0_RST_DONE_ACK BIT(24 )
#define CCI_IRQ_STATUS_0_I2C_M0_Q0Q1_HALT_ACK BIT(25 )
#define CCI_IRQ_STATUS_0_I2C_M1_Q0Q1_HALT_ACK BIT(26 )
#define CCI_IRQ_STATUS_0_I2C_M0_Q0_NACK_ERR BIT(27 )
#define CCI_IRQ_STATUS_0_I2C_M0_Q1_NACK_ERR BIT(28 )
#define CCI_IRQ_STATUS_0_I2C_M1_Q0_NACK_ERR BIT(29 )
#define CCI_IRQ_STATUS_0_I2C_M1_Q1_NACK_ERR BIT(30 )
#define CCI_IRQ_STATUS_0_I2C_M0_ERROR 0 x18000ee6
#define CCI_IRQ_STATUS_0_I2C_M1_ERROR 0 x60ee6000
#define CCI_TIMEOUT (msecs_to_jiffies(100 ))
#define NUM_MASTERS 2
#define NUM_QUEUES 2
/* Max number of resources + 1 for a NULL terminator */
#define CCI_RES_MAX 6
#define CCI_I2C_SET_PARAM 1
#define CCI_I2C_REPORT 8
#define CCI_I2C_WRITE 9
#define CCI_I2C_READ 10
#define CCI_I2C_REPORT_IRQ_EN BIT(8 )
enum {
I2C_MODE_STANDARD,
I2C_MODE_FAST,
I2C_MODE_FAST_PLUS,
};
enum cci_i2c_queue_t {
QUEUE_0,
QUEUE_1
};
struct hw_params {
u16 thigh; /* HIGH period of the SCL clock in clock ticks */
u16 tlow; /* LOW period of the SCL clock */
u16 tsu_sto; /* set-up time for STOP condition */
u16 tsu_sta; /* set-up time for a repeated START condition */
u16 thd_dat; /* data hold time */
u16 thd_sta; /* hold time (repeated) START condition */
u16 tbuf; /* bus free time between a STOP and START condition */
u8 scl_stretch_en;
u16 trdhld;
u16 tsp; /* pulse width of spikes suppressed by the input filter */
};
struct cci;
struct cci_master {
struct i2c_adapter adap;
u16 master;
u8 mode;
int status;
struct completion irq_complete;
struct cci *cci;
};
struct cci_data {
unsigned int num_masters;
struct i2c_adapter_quirks quirks;
u16 queue_size[NUM_QUEUES];
struct hw_params params[3 ];
};
struct cci {
struct device *dev;
void __iomem *base;
unsigned int irq;
const struct cci_data *data;
struct clk_bulk_data *clocks;
int nclocks;
struct cci_master master[NUM_MASTERS];
};
static irqreturn_t cci_isr(int irq, void *dev)
{
struct cci *cci = dev;
u32 val, reset = 0 ;
int ret = IRQ_NONE;
val = readl(cci->base + CCI_IRQ_STATUS_0);
writel(val, cci->base + CCI_IRQ_CLEAR_0);
writel(0 x1, cci->base + CCI_IRQ_GLOBAL_CLEAR_CMD);
if (val & CCI_IRQ_STATUS_0_RST_DONE_ACK) {
complete(&cci->master[0 ].irq_complete);
if (cci->master[1 ].master)
complete(&cci->master[1 ].irq_complete);
ret = IRQ_HANDLED;
}
if (val & CCI_IRQ_STATUS_0_I2C_M0_RD_DONE ||
val & CCI_IRQ_STATUS_0_I2C_M0_Q0_REPORT ||
val & CCI_IRQ_STATUS_0_I2C_M0_Q1_REPORT) {
cci->master[0 ].status = 0 ;
complete(&cci->master[0 ].irq_complete);
ret = IRQ_HANDLED;
}
if (val & CCI_IRQ_STATUS_0_I2C_M1_RD_DONE ||
val & CCI_IRQ_STATUS_0_I2C_M1_Q0_REPORT ||
val & CCI_IRQ_STATUS_0_I2C_M1_Q1_REPORT) {
cci->master[1 ].status = 0 ;
complete(&cci->master[1 ].irq_complete);
ret = IRQ_HANDLED;
}
if (unlikely(val & CCI_IRQ_STATUS_0_I2C_M0_Q0Q1_HALT_ACK)) {
reset = CCI_RESET_CMD_M0_MASK;
ret = IRQ_HANDLED;
}
if (unlikely(val & CCI_IRQ_STATUS_0_I2C_M1_Q0Q1_HALT_ACK)) {
reset = CCI_RESET_CMD_M1_MASK;
ret = IRQ_HANDLED;
}
if (unlikely(reset))
writel(reset, cci->base + CCI_RESET_CMD);
if (unlikely(val & CCI_IRQ_STATUS_0_I2C_M0_ERROR)) {
if (val & CCI_IRQ_STATUS_0_I2C_M0_Q0_NACK_ERR ||
val & CCI_IRQ_STATUS_0_I2C_M0_Q1_NACK_ERR)
cci->master[0 ].status = -ENXIO;
else
cci->master[0 ].status = -EIO;
writel(CCI_HALT_REQ_I2C_M0_Q0Q1, cci->base + CCI_HALT_REQ);
ret = IRQ_HANDLED;
}
if (unlikely(val & CCI_IRQ_STATUS_0_I2C_M1_ERROR)) {
if (val & CCI_IRQ_STATUS_0_I2C_M1_Q0_NACK_ERR ||
val & CCI_IRQ_STATUS_0_I2C_M1_Q1_NACK_ERR)
cci->master[1 ].status = -ENXIO;
else
cci->master[1 ].status = -EIO;
writel(CCI_HALT_REQ_I2C_M1_Q0Q1, cci->base + CCI_HALT_REQ);
ret = IRQ_HANDLED;
}
return ret;
}
static int cci_halt(struct cci *cci, u8 master_num)
{
struct cci_master *master;
u32 val;
if (master_num >= cci->data->num_masters) {
dev_err(cci->dev, "Unsupported master idx (%u)\n" , master_num);
return -EINVAL;
}
val = BIT(master_num);
master = &cci->master[master_num];
reinit_completion(&master->irq_complete);
writel(val, cci->base + CCI_HALT_REQ);
if (!wait_for_completion_timeout(&master->irq_complete, CCI_TIMEOUT)) {
dev_err(cci->dev, "CCI halt timeout\n" );
return -ETIMEDOUT;
}
return 0 ;
}
static int cci_reset(struct cci *cci)
{
/*
* we reset the whole controller , here and for implicity use
* master [ 0 ] . xxx for waiting on it .
*/
reinit_completion(&cci->master[0 ].irq_complete);
writel(CCI_RESET_CMD_MASK, cci->base + CCI_RESET_CMD);
if (!wait_for_completion_timeout(&cci->master[0 ].irq_complete,
CCI_TIMEOUT)) {
dev_err(cci->dev, "CCI reset timeout\n" );
return -ETIMEDOUT;
}
return 0 ;
}
static int cci_init(struct cci *cci)
{
u32 val = CCI_IRQ_MASK_0_I2C_M0_RD_DONE |
CCI_IRQ_MASK_0_I2C_M0_Q0_REPORT |
CCI_IRQ_MASK_0_I2C_M0_Q1_REPORT |
CCI_IRQ_MASK_0_I2C_M1_RD_DONE |
CCI_IRQ_MASK_0_I2C_M1_Q0_REPORT |
CCI_IRQ_MASK_0_I2C_M1_Q1_REPORT |
CCI_IRQ_MASK_0_RST_DONE_ACK |
CCI_IRQ_MASK_0_I2C_M0_Q0Q1_HALT_ACK |
CCI_IRQ_MASK_0_I2C_M1_Q0Q1_HALT_ACK |
CCI_IRQ_MASK_0_I2C_M0_ERROR |
CCI_IRQ_MASK_0_I2C_M1_ERROR;
int i;
writel(val, cci->base + CCI_IRQ_MASK_0);
for (i = 0 ; i < cci->data->num_masters; i++) {
int mode = cci->master[i].mode;
const struct hw_params *hw;
if (!cci->master[i].cci)
continue ;
hw = &cci->data->params[mode];
val = hw->thigh << 16 | hw->tlow;
writel(val, cci->base + CCI_I2C_Mm_SCL_CTL(i));
val = hw->tsu_sto << 16 | hw->tsu_sta;
writel(val, cci->base + CCI_I2C_Mm_SDA_CTL_0(i));
val = hw->thd_dat << 16 | hw->thd_sta;
writel(val, cci->base + CCI_I2C_Mm_SDA_CTL_1(i));
val = hw->tbuf;
writel(val, cci->base + CCI_I2C_Mm_SDA_CTL_2(i));
val = hw->scl_stretch_en << 8 | hw->trdhld << 4 | hw->tsp;
writel(val, cci->base + CCI_I2C_Mm_MISC_CTL(i));
}
return 0 ;
}
static int cci_run_queue(struct cci *cci, u8 master, u8 queue)
{
u32 val;
val = readl(cci->base + CCI_I2C_Mm_Qn_CUR_WORD_CNT(master, queue));
writel(val, cci->base + CCI_I2C_Mm_Qn_EXEC_WORD_CNT(master, queue));
reinit_completion(&cci->master[master].irq_complete);
val = BIT(master * 2 + queue);
writel(val, cci->base + CCI_QUEUE_START);
if (!wait_for_completion_timeout(&cci->master[master].irq_complete,
CCI_TIMEOUT)) {
dev_err(cci->dev, "master %d queue %d timeout\n" ,
master, queue);
cci_reset(cci);
cci_init(cci);
return -ETIMEDOUT;
}
return cci->master[master].status;
}
static int cci_validate_queue(struct cci *cci, u8 master, u8 queue)
{
u32 val;
val = readl(cci->base + CCI_I2C_Mm_Qn_CUR_WORD_CNT(master, queue));
if (val == cci->data->queue_size[queue])
return -EINVAL;
if (!val)
return 0 ;
val = CCI_I2C_REPORT | CCI_I2C_REPORT_IRQ_EN;
writel(val, cci->base + CCI_I2C_Mm_Qn_LOAD_DATA(master, queue));
return cci_run_queue(cci, master, queue);
}
static int cci_i2c_read(struct cci *cci, u16 master,
u16 addr, u8 *buf, u16 len)
{
u32 val, words_read, words_exp;
u8 queue = QUEUE_1;
int i, index = 0 , ret;
bool first = true ;
/*
* Call validate queue to make sure queue is empty before starting .
* This is to avoid overflow / underflow of queue .
*/
ret = cci_validate_queue(cci, master, queue);
if (ret < 0 )
return ret;
val = CCI_I2C_SET_PARAM | (addr & 0 x7f) << 4 ;
writel(val, cci->base + CCI_I2C_Mm_Qn_LOAD_DATA(master, queue));
val = CCI_I2C_READ | len << 4 ;
writel(val, cci->base + CCI_I2C_Mm_Qn_LOAD_DATA(master, queue));
ret = cci_run_queue(cci, master, queue);
if (ret < 0 )
return ret;
words_read = readl(cci->base + CCI_I2C_Mm_READ_BUF_LEVEL(master));
words_exp = len / 4 + 1 ;
if (words_read != words_exp) {
dev_err(cci->dev, "words read = %d, words expected = %d\n" ,
words_read, words_exp);
return -EIO;
}
do {
val = readl(cci->base + CCI_I2C_Mm_READ_DATA(master));
for (i = 0 ; i < 4 && index < len; i++) {
if (first) {
/* The LS byte of this register represents the
* first byte read from the slave during a read
* access .
*/
first = false ;
continue ;
}
buf[index++] = (val >> (i * 8 )) & 0 xff;
}
} while (--words_read);
return 0 ;
}
static int cci_i2c_write(struct cci *cci, u16 master,
u16 addr, u8 *buf, u16 len)
{
u8 queue = QUEUE_0;
u8 load[12 ] = { 0 };
int i = 0 , j, ret;
u32 val;
/*
* Call validate queue to make sure queue is empty before starting .
* This is to avoid overflow / underflow of queue .
*/
ret = cci_validate_queue(cci, master, queue);
if (ret < 0 )
return ret;
val = CCI_I2C_SET_PARAM | (addr & 0 x7f) << 4 ;
writel(val, cci->base + CCI_I2C_Mm_Qn_LOAD_DATA(master, queue));
load[i++] = CCI_I2C_WRITE | len << 4 ;
for (j = 0 ; j < len; j++)
load[i++] = buf[j];
for (j = 0 ; j < i; j += 4 ) {
val = load[j];
val |= load[j + 1 ] << 8 ;
val |= load[j + 2 ] << 16 ;
val |= load[j + 3 ] << 24 ;
writel(val, cci->base + CCI_I2C_Mm_Qn_LOAD_DATA(master, queue));
}
val = CCI_I2C_REPORT | CCI_I2C_REPORT_IRQ_EN;
writel(val, cci->base + CCI_I2C_Mm_Qn_LOAD_DATA(master, queue));
return cci_run_queue(cci, master, queue);
}
static int cci_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
{
struct cci_master *cci_master = i2c_get_adapdata(adap);
struct cci *cci = cci_master->cci;
int i, ret;
ret = pm_runtime_get_sync(cci->dev);
if (ret < 0 )
goto err;
for (i = 0 ; i < num; i++) {
if (msgs[i].flags & I2C_M_RD)
ret = cci_i2c_read(cci, cci_master->master,
msgs[i].addr, msgs[i].buf,
msgs[i].len);
else
ret = cci_i2c_write(cci, cci_master->master,
msgs[i].addr, msgs[i].buf,
msgs[i].len);
if (ret < 0 )
break ;
}
if (!ret)
ret = num;
err:
pm_runtime_mark_last_busy(cci->dev);
pm_runtime_put_autosuspend(cci->dev);
return ret;
}
static u32 cci_func(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm cci_algo = {
.xfer = cci_xfer,
.functionality = cci_func,
};
static int cci_enable_clocks(struct cci *cci)
{
return clk_bulk_prepare_enable(cci->nclocks, cci->clocks);
}
static void cci_disable_clocks(struct cci *cci)
{
clk_bulk_disable_unprepare(cci->nclocks, cci->clocks);
}
static int __maybe_unused cci_suspend_runtime(struct device *dev)
{
struct cci *cci = dev_get_drvdata(dev);
cci_disable_clocks(cci);
return 0 ;
}
static int __maybe_unused cci_resume_runtime(struct device *dev)
{
struct cci *cci = dev_get_drvdata(dev);
int ret;
ret = cci_enable_clocks(cci);
if (ret)
return ret;
cci_init(cci);
return 0 ;
}
static int __maybe_unused cci_suspend(struct device *dev)
{
if (!pm_runtime_suspended(dev))
return cci_suspend_runtime(dev);
return 0 ;
}
static int __maybe_unused cci_resume(struct device *dev)
{
cci_resume_runtime(dev);
pm_runtime_mark_last_busy(dev);
pm_request_autosuspend(dev);
return 0 ;
}
static const struct dev_pm_ops qcom_cci_pm = {
SET_SYSTEM_SLEEP_PM_OPS(cci_suspend, cci_resume)
SET_RUNTIME_PM_OPS(cci_suspend_runtime, cci_resume_runtime, NULL)
};
static int cci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *child;
struct resource *r;
struct cci *cci;
int ret, i;
u32 val;
cci = devm_kzalloc(dev, sizeof (*cci), GFP_KERNEL);
if (!cci)
return -ENOMEM;
cci->dev = dev;
platform_set_drvdata(pdev, cci);
cci->data = device_get_match_data(dev);
if (!cci->data)
return -ENOENT;
for_each_available_child_of_node(dev->of_node, child) {
struct cci_master *master;
u32 idx;
ret = of_property_read_u32(child, "reg" , &idx);
if (ret) {
dev_err(dev, "%pOF invalid 'reg' property" , child);
continue ;
}
if (idx >= cci->data->num_masters) {
dev_err(dev, "%pOF invalid 'reg' value: %u (max is %u)" ,
child, idx, cci->data->num_masters - 1 );
continue ;
}
master = &cci->master[idx];
master->adap.quirks = &cci->data->quirks;
master->adap.algo = &cci_algo;
master->adap.dev.parent = dev;
master->adap.dev.of_node = of_node_get(child);
master->master = idx;
master->cci = cci;
i2c_set_adapdata(&master->adap, master);
snprintf(master->adap.name, sizeof (master->adap.name), "Qualcomm-CCI" );
master->mode = I2C_MODE_STANDARD;
ret = of_property_read_u32(child, "clock-frequency" , &val);
if (!ret) {
if (val == I2C_MAX_FAST_MODE_FREQ)
master->mode = I2C_MODE_FAST;
else if (val == I2C_MAX_FAST_MODE_PLUS_FREQ)
master->mode = I2C_MODE_FAST_PLUS;
}
init_completion(&master->irq_complete);
}
/* Memory */
cci->base = devm_platform_get_and_ioremap_resource(pdev, 0 , &r);
if (IS_ERR(cci->base))
return PTR_ERR(cci->base);
/* Clocks */
ret = devm_clk_bulk_get_all(dev, &cci->clocks);
if (ret < 0 )
return dev_err_probe(dev, ret, "failed to get clocks\n" );
else if (!ret)
return dev_err_probe(dev, -EINVAL, "not enough clocks in DT\n" );
cci->nclocks = ret;
ret = cci_enable_clocks(cci);
if (ret < 0 )
return ret;
/* Interrupt */
ret = platform_get_irq(pdev, 0 );
if (ret < 0 )
goto disable_clocks;
cci->irq = ret;
ret = devm_request_irq(dev, cci->irq, cci_isr, 0 , dev_name(dev), cci);
if (ret < 0 ) {
dev_err(dev, "request_irq failed, ret: %d\n" , ret);
goto disable_clocks;
}
val = readl(cci->base + CCI_HW_VERSION);
dev_dbg(dev, "CCI HW version = 0x%08x" , val);
ret = cci_reset(cci);
if (ret < 0 )
goto error;
ret = cci_init(cci);
if (ret < 0 )
goto error;
pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
for (i = 0 ; i < cci->data->num_masters; i++) {
if (!cci->master[i].cci)
continue ;
ret = i2c_add_adapter(&cci->master[i].adap);
if (ret < 0 ) {
of_node_put(cci->master[i].adap.dev.of_node);
goto error_i2c;
}
}
return 0 ;
error_i2c:
pm_runtime_disable(dev);
pm_runtime_dont_use_autosuspend(dev);
for (--i ; i >= 0 ; i--) {
if (cci->master[i].cci) {
i2c_del_adapter(&cci->master[i].adap);
of_node_put(cci->master[i].adap.dev.of_node);
}
}
error:
disable_irq(cci->irq);
disable_clocks:
cci_disable_clocks(cci);
return ret;
}
static void cci_remove(struct platform_device *pdev)
{
struct cci *cci = platform_get_drvdata(pdev);
int i;
for (i = 0 ; i < cci->data->num_masters; i++) {
if (cci->master[i].cci) {
i2c_del_adapter(&cci->master[i].adap);
of_node_put(cci->master[i].adap.dev.of_node);
}
cci_halt(cci, i);
}
disable_irq(cci->irq);
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
}
static const struct cci_data cci_v1_data = {
.num_masters = 1 ,
.queue_size = { 64 , 16 },
.quirks = {
.max_write_len = 10 ,
.max_read_len = 12 ,
},
.params[I2C_MODE_STANDARD] = {
.thigh = 78 ,
.tlow = 114 ,
.tsu_sto = 28 ,
.tsu_sta = 28 ,
.thd_dat = 10 ,
.thd_sta = 77 ,
.tbuf = 118 ,
.scl_stretch_en = 0 ,
.trdhld = 6 ,
.tsp = 1
},
.params[I2C_MODE_FAST] = {
.thigh = 20 ,
.tlow = 28 ,
.tsu_sto = 21 ,
.tsu_sta = 21 ,
.thd_dat = 13 ,
.thd_sta = 18 ,
.tbuf = 32 ,
.scl_stretch_en = 0 ,
.trdhld = 6 ,
.tsp = 3
},
};
static const struct cci_data cci_v1_5_data = {
.num_masters = 2 ,
.queue_size = { 64 , 16 },
.quirks = {
.max_write_len = 10 ,
.max_read_len = 12 ,
},
.params[I2C_MODE_STANDARD] = {
.thigh = 78 ,
.tlow = 114 ,
.tsu_sto = 28 ,
.tsu_sta = 28 ,
.thd_dat = 10 ,
.thd_sta = 77 ,
.tbuf = 118 ,
.scl_stretch_en = 0 ,
.trdhld = 6 ,
.tsp = 1
},
.params[I2C_MODE_FAST] = {
.thigh = 20 ,
.tlow = 28 ,
.tsu_sto = 21 ,
.tsu_sta = 21 ,
.thd_dat = 13 ,
.thd_sta = 18 ,
.tbuf = 32 ,
.scl_stretch_en = 0 ,
.trdhld = 6 ,
.tsp = 3
},
};
static const struct cci_data cci_v2_data = {
.num_masters = 2 ,
.queue_size = { 64 , 16 },
.quirks = {
.max_write_len = 11 ,
.max_read_len = 12 ,
},
.params[I2C_MODE_STANDARD] = {
.thigh = 201 ,
.tlow = 174 ,
.tsu_sto = 204 ,
.tsu_sta = 231 ,
.thd_dat = 22 ,
.thd_sta = 162 ,
.tbuf = 227 ,
.scl_stretch_en = 0 ,
.trdhld = 6 ,
.tsp = 3
},
.params[I2C_MODE_FAST] = {
.thigh = 38 ,
.tlow = 56 ,
.tsu_sto = 40 ,
.tsu_sta = 40 ,
.thd_dat = 22 ,
.thd_sta = 35 ,
.tbuf = 62 ,
.scl_stretch_en = 0 ,
.trdhld = 6 ,
.tsp = 3
},
.params[I2C_MODE_FAST_PLUS] = {
.thigh = 16 ,
.tlow = 22 ,
.tsu_sto = 17 ,
.tsu_sta = 18 ,
.thd_dat = 16 ,
.thd_sta = 15 ,
.tbuf = 24 ,
.scl_stretch_en = 0 ,
.trdhld = 3 ,
.tsp = 3
},
};
static const struct of_device_id cci_dt_match[] = {
{ .compatible = "qcom,msm8226-cci" , .data = &cci_v1_data},
{ .compatible = "qcom,msm8974-cci" , .data = &cci_v1_5_data},
{ .compatible = "qcom,msm8996-cci" , .data = &cci_v2_data},
/*
* Legacy compatibles kept for backwards compatibility .
* Do not add any new ones unless they introduce a new config
*/
{ .compatible = "qcom,msm8916-cci" , .data = &cci_v1_data},
{ .compatible = "qcom,sdm845-cci" , .data = &cci_v2_data},
{ .compatible = "qcom,sm8250-cci" , .data = &cci_v2_data},
{ .compatible = "qcom,sm8450-cci" , .data = &cci_v2_data},
{}
};
MODULE_DEVICE_TABLE(of, cci_dt_match);
static struct platform_driver qcom_cci_driver = {
.probe = cci_probe,
.remove = cci_remove,
.driver = {
.name = "i2c-qcom-cci" ,
.of_match_table = cci_dt_match,
.pm = &qcom_cci_pm,
},
};
module_platform_driver(qcom_cci_driver);
MODULE_DESCRIPTION("Qualcomm Camera Control Interface driver" );
MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>" );
MODULE_AUTHOR("Loic Poulain <loic.poulain@linaro.org>" );
MODULE_LICENSE("GPL v2" );
Messung V0.5 in Prozent C=96 H=91 G=93
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-28)
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