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sonic-buildimage/platform/centec/sonic-platform-modules-v682/48y8c/modules/rtc-sd2405.c
LuiSzee 9e19a9a7cf
[centec] support v682-48y8c and v682-48x8c (#9349) 
Why I did it
Adding platform support for centec v682-48y8c and v682-48x8c.
V682-48y8c switch has 48 SFP+ (1G/10G/25G) ports, 8 QSFP28 (40G/100G) ports on CENTEC TsingMa.MX.
V682-48y8c is different from V682-48y8c_d in that:

transceiver is managed by cpu smbus rather than TsingMa.MX i2c bus.
port led is managed by mcu inside TsingMa.MX.
fan, psu, sensors, leds are managed by cpu smbus other than the cpu board vendor's close sourse driver.
V682-48x8c switch has 48 SFP+ (1G/10G) ports, 8 QSFP28 (40G/100G) ports on CENTEC TsingMa.MX.
CPU used in v682-48y8c and v682-48x8c is Intel(R) Xeon(R) CPU D-1527.

How I did it
Modify related code in platform and device directory.
Upgrade centec sai to v1.9.
upgrade python to python3 and kernel version to 5.0 for V682-48y8c_d.
How to verify it
Build centec amd64 sonic image, verify platform functions (port, sfp, led etc) on centec v682-48y8c and v682-48x8c board.

Co-authored-by: shil <shil@centecnetworks.com>
2021-12-17 15:20:27 -08:00

265 lines
6.1 KiB
C
Raw Blame History

/*
* rtc class driver for the SD2405 chip
*
* Author: Dale Farnsworth <dale@farnsworth.org>
*
* based on previously existing rtc class drivers
*
* 2007 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/rtc.h>
#include <linux/delay.h>
#define DRV_VERSION "0.1"
/*
* register indices
*/
#define SD2405_REG_SC 0x0 /* seconds 00-59 */
#define SD2405_REG_MN 0x1 /* minutes 00-59 */
#define SD2405_REG_HR 0x2 /* hours 00-23 */
#define SD2405_REG_DW 0x3 /* day of week 1-7 */
#define SD2405_REG_DT 0x4 /* day of month 00-31 */
#define SD2405_REG_MO 0x5 /* month 01-12 */
#define SD2405_REG_YR 0x6 /* year 00-99 */
#define SD2405_REG_CTRL1 0xf /* control 1 */
#define SD2405_REG_CTRL2 0x10 /* control 2 */
#define SD2405_REG_CTRL3 0x11 /* control 3 ARST*/
#define SD2405_REG_LEN 7
/*
* register write protect
*/
#define SD2405_REG_CONTROL1_WRITE 0x80
#define SD2405_REG_CONTROL2_WRITE 0x84
#define SD2405_IDLE_TIME_AFTER_WRITE 3 /* specification says 2.5 mS */
static struct i2c_driver sd2405_driver;
#if 1
/* modified by shil, for bug 46153 */
static int sd2405_i2c_read_regs(struct i2c_client *client, u8 *buf)
{
int i;
for (i = 0; i < SD2405_REG_LEN; i++) {
buf[i] = i2c_smbus_read_byte_data(client, SD2405_REG_SC+i);
}
return 0;
}
/* modified by shil, for bug 46153 */
static int sd2405_i2c_write_regs(struct i2c_client *client, u8 const *buf)
{
int i;
for (i = 0; i < SD2405_REG_LEN; i++) {
i2c_smbus_write_byte_data(client, SD2405_REG_SC+i, buf[i]);
msleep(SD2405_IDLE_TIME_AFTER_WRITE);
}
return 0;
}
#else
static int sd2405_i2c_read_regs(struct i2c_client *client, u8 *buf)
{
struct i2c_msg msgs[1] = {
{
.addr = client->addr,
.flags = I2C_M_RD, /* read */
.len = SD2405_REG_LEN,
.buf = buf}
};
int rc;
rc = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (rc != ARRAY_SIZE(msgs)) {
dev_err(&client->dev, "%s: register read failed\n", __func__);
return -EIO;
}
return 0;
}
static int sd2405_i2c_write_regs(struct i2c_client *client, u8 const *buf)
{
int rc;
u8 temp_reg[SD2405_REG_LEN+1] = {0};
memcpy(&temp_reg[1], buf, SD2405_REG_LEN);
struct i2c_msg msgs[1] = {
{
.addr = client->addr,
.flags = 0, /* write */
.len = SD2405_REG_LEN+1,
.buf = temp_reg}
};
rc = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (rc != ARRAY_SIZE(msgs))
goto write_failed;
msleep(SD2405_IDLE_TIME_AFTER_WRITE);
return 0;
write_failed:
dev_err(&client->dev, "%s: register write failed\n", __func__);
return -EIO;
}
#endif
static int sd2405_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
{
int rc;
u8 regs[SD2405_REG_LEN];
rc = sd2405_i2c_read_regs(client, regs);
if (rc < 0)
return rc;
tm->tm_sec = bcd2bin(regs[SD2405_REG_SC]);
tm->tm_min = bcd2bin(regs[SD2405_REG_MN]);
tm->tm_hour = bcd2bin(regs[SD2405_REG_HR] & 0x3f);
tm->tm_wday = bcd2bin(regs[SD2405_REG_DW]);
tm->tm_mday = bcd2bin(regs[SD2405_REG_DT]);
tm->tm_mon = bcd2bin(regs[SD2405_REG_MO]) - 1;
tm->tm_year = bcd2bin(regs[SD2405_REG_YR]) + 100;
return 0;
}
static int sd2405_i2c_set_write_protect(struct i2c_client *client)
{
int rc;
rc = i2c_smbus_write_byte_data(client, SD2405_REG_CTRL1, 0);
rc += i2c_smbus_write_byte_data(client, SD2405_REG_CTRL2, 0);
if (rc < 0) {
dev_err(&client->dev, "%s: control register write failed\n",
__func__);
return -EIO;
}
return 0;
}
static int sd2405_i2c_clear_write_protect(struct i2c_client *client)
{
int rc;
rc = i2c_smbus_write_byte_data(client, SD2405_REG_CTRL2, SD2405_REG_CONTROL1_WRITE);
rc += i2c_smbus_write_byte_data(client, SD2405_REG_CTRL1, SD2405_REG_CONTROL2_WRITE);
if (rc < 0) {
dev_err(&client->dev, "%s: control register write failed\n",
__func__);
return -EIO;
}
return 0;
}
static int
sd2405_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm)
{
u8 regs[SD2405_REG_LEN];
int rc;
rc = sd2405_i2c_clear_write_protect(client);
if (rc < 0)
return rc;
regs[SD2405_REG_SC] = bin2bcd(tm->tm_sec);
regs[SD2405_REG_MN] = bin2bcd(tm->tm_min);
regs[SD2405_REG_HR] = bin2bcd(tm->tm_hour)|0x80;
regs[SD2405_REG_DW] = bin2bcd(tm->tm_wday);
regs[SD2405_REG_DT] = bin2bcd(tm->tm_mday);
regs[SD2405_REG_MO] = bin2bcd(tm->tm_mon + 1);
regs[SD2405_REG_YR] = bin2bcd(tm->tm_year - 100);
rc = sd2405_i2c_write_regs(client, regs);
if (rc < 0)
return rc;
rc = sd2405_i2c_set_write_protect(client);
if (rc < 0)
return rc;
return 0;
}
static int sd2405_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
return sd2405_i2c_read_time(to_i2c_client(dev), tm);
}
static int sd2405_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
return sd2405_i2c_set_time(to_i2c_client(dev), tm);
}
static const struct rtc_class_ops sd2405_rtc_ops = {
.read_time = sd2405_rtc_read_time,
.set_time = sd2405_rtc_set_time,
};
static int
sd2405_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct rtc_device *rtc;
/* modified by shil, for bug 46153 */
#if 0
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
#endif
dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
rtc = devm_rtc_allocate_device(&client->dev);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
i2c_set_clientdata(client, rtc);
rtc->ops = &sd2405_rtc_ops;
return rtc_register_device(rtc);
}
static struct i2c_device_id sd2405_id[] = {
{ "sd2405", 0 },
{ }
};
static struct i2c_driver sd2405_driver = {
.driver = {
.name = "rtc-sd2405",
},
.probe = sd2405_probe,
.id_table = sd2405_id,
};
static int __init sd2405_init(void)
{
return i2c_add_driver(&sd2405_driver);
}
static void __exit sd2405_exit(void)
{
i2c_del_driver(&sd2405_driver);
}
MODULE_DESCRIPTION("Maxim SD2405 RTC driver");
MODULE_AUTHOR("Dale Farnsworth <dale@farnsworth.org>");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
module_init(sd2405_init);
module_exit(sd2405_exit);
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