+// SPDX-License-Identifier: GPL-2.0+
/*
* i2c driver for Freescale i.MX series
*
* Copyright (C) 2007 RightHand Technologies, Inc.
* Copyright (C) 2008 Darius Augulis <darius.augulis at teltonika.lt>
*
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
-#include <asm/errno.h>
-#include <asm/imx-common/mxc_i2c.h>
+#include <linux/errno.h>
+#include <asm/mach-imx/mxc_i2c.h>
#include <asm/io.h>
#include <i2c.h>
#include <watchdog.h>
#define IMX_I2C_REGSHIFT 2
#define VF610_I2C_REGSHIFT 0
+
+#define I2C_EARLY_INIT_INDEX 0
+#ifdef CONFIG_SYS_I2C_IFDR_DIV
+#define I2C_IFDR_DIV_CONSERVATIVE CONFIG_SYS_I2C_IFDR_DIV
+#else
+#define I2C_IFDR_DIV_CONSERVATIVE 0x7e
+#endif
+
/* Register index */
#define IADR 0
#define IFDR 1
#define I2SR_IIF_CLEAR (0 << 1)
#endif
-#if defined(CONFIG_HARD_I2C) && !defined(CONFIG_SYS_I2C_BASE)
-#error "define CONFIG_SYS_I2C_BASE to use the mxc_i2c driver"
-#endif
-
#ifdef I2C_QUIRK_REG
static u16 i2c_clk_div[60][2] = {
{ 20, 0x00 }, { 22, 0x01 }, { 24, 0x02 }, { 26, 0x03 },
int reg_shift = quirk ? VF610_I2C_REGSHIFT : IMX_I2C_REGSHIFT;
if (!base)
- return -ENODEV;
+ return -EINVAL;
/* Store divider value */
writeb(idx, base + (IFDR << reg_shift));
if (ret < 0)
return ret;
if (ret & I2SR_RX_NO_AK)
- return -ENODEV;
+ return -EREMOTEIO;
return 0;
}
temp |= I2CR_MTX | I2CR_TX_NO_AK;
writeb(temp, base + (I2CR << reg_shift));
- /* write slave address */
- ret = tx_byte(i2c_bus, chip << 1);
- if (ret < 0)
- return ret;
-
- while (alen--) {
- ret = tx_byte(i2c_bus, (addr >> (alen * 8)) & 0xff);
+ if (alen >= 0) {
+ /* write slave address */
+ ret = tx_byte(i2c_bus, chip << 1);
if (ret < 0)
return ret;
+
+ while (alen--) {
+ ret = tx_byte(i2c_bus, (addr >> (alen * 8)) & 0xff);
+ if (ret < 0)
+ return ret;
+ }
}
+
return 0;
}
VF610_I2C_REGSHIFT : IMX_I2C_REGSHIFT;
if (!i2c_bus->base)
- return -ENODEV;
+ return -EINVAL;
for (retry = 0; retry < 3; retry++) {
ret = i2c_init_transfer_(i2c_bus, chip, addr, alen);
if (ret >= 0)
return 0;
i2c_imx_stop(i2c_bus);
- if (ret == -ENODEV)
+ if (ret == -EREMOTEIO)
return ret;
printf("%s: failed for chip 0x%x retry=%d\n", __func__, chip,
if (ret < 0)
return ret;
- temp = readb(base + (I2CR << reg_shift));
- temp |= I2CR_RSTA;
- writeb(temp, base + (I2CR << reg_shift));
+ if (alen >= 0) {
+ temp = readb(base + (I2CR << reg_shift));
+ temp |= I2CR_RSTA;
+ writeb(temp, base + (I2CR << reg_shift));
+ }
ret = tx_byte(i2c_bus, (chip << 1) | 1);
if (ret < 0) {
#define I2C4_BASE_ADDR 0
#endif
+#if !defined(I2C5_BASE_ADDR)
+#define I2C5_BASE_ADDR 0
+#endif
+
+#if !defined(I2C6_BASE_ADDR)
+#define I2C6_BASE_ADDR 0
+#endif
+
+#if !defined(I2C7_BASE_ADDR)
+#define I2C7_BASE_ADDR 0
+#endif
+
+#if !defined(I2C8_BASE_ADDR)
+#define I2C8_BASE_ADDR 0
+#endif
+
static struct mxc_i2c_bus mxc_i2c_buses[] = {
-#if defined(CONFIG_LS102XA) || defined(CONFIG_VF610) || \
+#if defined(CONFIG_ARCH_LS1021A) || defined(CONFIG_VF610) || \
defined(CONFIG_FSL_LAYERSCAPE)
{ 0, I2C1_BASE_ADDR, I2C_QUIRK_FLAG },
{ 1, I2C2_BASE_ADDR, I2C_QUIRK_FLAG },
{ 2, I2C3_BASE_ADDR, I2C_QUIRK_FLAG },
{ 3, I2C4_BASE_ADDR, I2C_QUIRK_FLAG },
+ { 4, I2C5_BASE_ADDR, I2C_QUIRK_FLAG },
+ { 5, I2C6_BASE_ADDR, I2C_QUIRK_FLAG },
+ { 6, I2C7_BASE_ADDR, I2C_QUIRK_FLAG },
+ { 7, I2C8_BASE_ADDR, I2C_QUIRK_FLAG },
#else
{ 0, I2C1_BASE_ADDR, 0 },
{ 1, I2C2_BASE_ADDR, 0 },
{ 2, I2C3_BASE_ADDR, 0 },
{ 3, I2C4_BASE_ADDR, 0 },
+ { 4, I2C5_BASE_ADDR, 0 },
+ { 5, I2C6_BASE_ADDR, 0 },
+ { 6, I2C7_BASE_ADDR, 0 },
+ { 7, I2C8_BASE_ADDR, 0 },
#endif
};
bus_i2c_set_bus_speed(&mxc_i2c_buses[index], speed);
}
+/*
+ * Early init I2C for prepare read the clk through I2C.
+ */
+void i2c_early_init_f(void)
+{
+ ulong base = mxc_i2c_buses[I2C_EARLY_INIT_INDEX].base;
+ bool quirk = mxc_i2c_buses[I2C_EARLY_INIT_INDEX].driver_data
+ & I2C_QUIRK_FLAG ? true : false;
+ int reg_shift = quirk ? VF610_I2C_REGSHIFT : IMX_I2C_REGSHIFT;
+
+ /* Set I2C divider value */
+ writeb(I2C_IFDR_DIV_CONSERVATIVE, base + (IFDR << reg_shift));
+ /* Reset module */
+ writeb(I2CR_IDIS, base + (I2CR << reg_shift));
+ writeb(0, base + (I2SR << reg_shift));
+ /* Enable I2C */
+ writeb(I2CR_IEN, base + (I2CR << reg_shift));
+}
+
/*
* Init I2C Bus
*/
CONFIG_SYS_MXC_I2C4_SLAVE, 3)
#endif
+#ifdef CONFIG_SYS_I2C_MXC_I2C5
+U_BOOT_I2C_ADAP_COMPLETE(mxc4, mxc_i2c_init, mxc_i2c_probe,
+ mxc_i2c_read, mxc_i2c_write,
+ mxc_i2c_set_bus_speed,
+ CONFIG_SYS_MXC_I2C5_SPEED,
+ CONFIG_SYS_MXC_I2C5_SLAVE, 4)
+#endif
+
+#ifdef CONFIG_SYS_I2C_MXC_I2C6
+U_BOOT_I2C_ADAP_COMPLETE(mxc5, mxc_i2c_init, mxc_i2c_probe,
+ mxc_i2c_read, mxc_i2c_write,
+ mxc_i2c_set_bus_speed,
+ CONFIG_SYS_MXC_I2C6_SPEED,
+ CONFIG_SYS_MXC_I2C6_SLAVE, 5)
+#endif
+
+#ifdef CONFIG_SYS_I2C_MXC_I2C7
+U_BOOT_I2C_ADAP_COMPLETE(mxc6, mxc_i2c_init, mxc_i2c_probe,
+ mxc_i2c_read, mxc_i2c_write,
+ mxc_i2c_set_bus_speed,
+ CONFIG_SYS_MXC_I2C7_SPEED,
+ CONFIG_SYS_MXC_I2C7_SLAVE, 6)
+#endif
+
+#ifdef CONFIG_SYS_I2C_MXC_I2C8
+U_BOOT_I2C_ADAP_COMPLETE(mxc7, mxc_i2c_init, mxc_i2c_probe,
+ mxc_i2c_read, mxc_i2c_write,
+ mxc_i2c_set_bus_speed,
+ CONFIG_SYS_MXC_I2C8_SPEED,
+ CONFIG_SYS_MXC_I2C8_SLAVE, 7)
+#endif
+
#else
static int mxc_i2c_set_bus_speed(struct udevice *bus, unsigned int speed)
{
struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
const void *fdt = gd->fdt_blob;
- int node = bus->of_offset;
+ int node = dev_of_offset(bus);
fdt_addr_t addr;
int ret, ret2;
i2c_bus->driver_data = dev_get_driver_data(bus);
- addr = dev_get_addr(bus);
+ addr = devfdt_get_addr(bus);
if (addr == FDT_ADDR_T_NONE)
- return -ENODEV;
+ return -EINVAL;
i2c_bus->base = addr;
i2c_bus->index = bus->seq;
* See Documentation/devicetree/bindings/i2c/i2c-imx.txt
* Use gpio to force bus idle when necessary.
*/
- ret = fdt_find_string(fdt, node, "pinctrl-names", "gpio");
+ ret = fdt_stringlist_search(fdt, node, "pinctrl-names", "gpio");
if (ret < 0) {
- dev_info(dev, "i2c bus %d at %lu, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
+ debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
} else {
- ret = gpio_request_by_name_nodev(fdt, node, "scl-gpios",
- 0, &i2c_bus->scl_gpio,
- GPIOD_IS_OUT);
- ret2 = gpio_request_by_name_nodev(fdt, node, "sda-gpios",
- 0, &i2c_bus->sda_gpio,
- GPIOD_IS_OUT);
- if (!dm_gpio_is_valid(&i2c_bus->sda_gpio) |
- !dm_gpio_is_valid(&i2c_bus->scl_gpio) |
- ret | ret2) {
+ ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
+ "scl-gpios", 0, &i2c_bus->scl_gpio,
+ GPIOD_IS_OUT);
+ ret2 = gpio_request_by_name_nodev(offset_to_ofnode(node),
+ "sda-gpios", 0, &i2c_bus->sda_gpio,
+ GPIOD_IS_OUT);
+ if (!dm_gpio_is_valid(&i2c_bus->sda_gpio) ||
+ !dm_gpio_is_valid(&i2c_bus->scl_gpio) ||
+ ret || ret2) {
dev_err(dev, "i2c bus %d at %lu, fail to request scl/sda gpio\n", bus->seq, i2c_bus->base);
- return -ENODEV;
+ return -EINVAL;
}
}
projects / u-boot / blobdiff