*
* (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
* (c) 2011 Marek Vasut <marek.vasut@gmail.com>
+ * Copyright 2020 NXP
*
* Based on i2c-imx.c from linux kernel:
* Copyright (C) 2005 Torsten Koschorrek <koschorrek at synertronixx.de>
*/
#include <common.h>
+#include <log.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
+#include <dm/device_compat.h>
+#include <linux/delay.h>
#include <linux/errno.h>
#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/mach-imx/sys_proto.h>
#include <asm/io.h>
#include <i2c.h>
#include <watchdog.h>
#endif
/* Divider value calculation */
+#if CONFIG_IS_ENABLED(CLK)
+ i2c_clk_rate = clk_get_rate(&i2c_bus->per_clk);
+#else
i2c_clk_rate = mxc_get_clock(MXC_I2C_CLK);
+#endif
+
div = (i2c_clk_rate + rate - 1) / rate;
if (div < i2c_clk_div[0][0])
clk_div = 0;
return 0;
}
+#if !defined(I2C2_BASE_ADDR)
+#define I2C2_BASE_ADDR 0
+#endif
+
+#if !defined(I2C3_BASE_ADDR)
+#define I2C3_BASE_ADDR 0
+#endif
+
+#if !defined(I2C4_BASE_ADDR)
+#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_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
+};
+
#ifndef CONFIG_DM_I2C
int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)
{
return ret;
}
#endif
+/*
+ * 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));
+}
static int i2c_init_transfer(struct mxc_i2c_bus *i2c_bus, u8 chip,
u32 addr, int alen)
return 0;
}
+int __enable_i2c_clk(unsigned char enable, unsigned int i2c_num)
+{
+ return 1;
+}
+
+int enable_i2c_clk(unsigned char enable, unsigned int i2c_num)
+ __attribute__((weak, alias("__enable_i2c_clk")));
+
#ifndef CONFIG_DM_I2C
/*
* Read data from I2C device
return ret;
}
-#if !defined(I2C2_BASE_ADDR)
-#define I2C2_BASE_ADDR 0
-#endif
-
-#if !defined(I2C3_BASE_ADDR)
-#define I2C3_BASE_ADDR 0
-#endif
-
-#if !defined(I2C4_BASE_ADDR)
-#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_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
-};
-
struct mxc_i2c_bus *i2c_get_base(struct i2c_adapter *adap)
{
return &mxc_i2c_buses[adap->hwadapnr];
return bus_i2c_write(i2c_get_base(adap), chip, 0, 0, NULL, 0);
}
-int __enable_i2c_clk(unsigned char enable, unsigned i2c_num)
-{
- return 1;
-}
-int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
- __attribute__((weak, alias("__enable_i2c_clk")));
-
void bus_i2c_init(int index, int speed, int unused,
int (*idle_bus_fn)(void *p), void *idle_bus_data)
{
return;
}
+ if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
+ if (i2c_fused((ulong)mxc_i2c_buses[index].base)) {
+ printf("SoC fuse indicates I2C@0x%lx is unavailable.\n",
+ (ulong)mxc_i2c_buses[index].base);
+ return;
+ }
+ }
+
/*
* Warning: Be careful to allow the assignment to a static
* variable here. This function could be called while U-Boot is
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
i2c_bus->driver_data = dev_get_driver_data(bus);
- addr = devfdt_get_addr(bus);
+ addr = dev_read_addr(bus);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
+ if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
+ if (i2c_fused((ulong)addr)) {
+ printf("SoC fuse indicates I2C@0x%lx is unavailable.\n",
+ (ulong)addr);
+ return -ENODEV;
+ }
+ }
+
i2c_bus->base = addr;
- i2c_bus->index = bus->seq;
+ i2c_bus->index = dev_seq(bus);
i2c_bus->bus = bus;
/* Enable clk */
- ret = enable_i2c_clk(1, bus->seq);
+#if CONFIG_IS_ENABLED(CLK)
+ ret = clk_get_by_index(bus, 0, &i2c_bus->per_clk);
+ if (ret) {
+ printf("Failed to get i2c clk\n");
+ return ret;
+ }
+ ret = clk_enable(&i2c_bus->per_clk);
+ if (ret) {
+ printf("Failed to enable i2c clk\n");
+ return ret;
+ }
+#else
+ ret = enable_i2c_clk(1, dev_seq(bus));
if (ret < 0)
return ret;
+#endif
/*
* See Documentation/devicetree/bindings/i2c/i2c-imx.txt
*/
ret = fdt_stringlist_search(fdt, node, "pinctrl-names", "gpio");
if (ret < 0) {
- debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
+ debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n",
+ dev_seq(bus), i2c_bus->base);
} else {
ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
"scl-gpios", 0, &i2c_bus->scl_gpio,
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);
+ dev_err(bus,
+ "i2c bus %d at 0x%2lx, fail to request scl/sda gpio\n",
+ dev_seq(bus), i2c_bus->base);
return -EINVAL;
}
}
- ret = i2c_idle_bus(i2c_bus);
- if (ret < 0) {
- /* Disable clk */
- enable_i2c_clk(0, bus->seq);
- return ret;
- }
-
/*
* Pinmux settings are in board file now, until pinmux is supported,
* we can set pinmux here in probe function.
*/
debug("i2c : controller bus %d at %lu , speed %d: ",
- bus->seq, i2c_bus->base,
+ dev_seq(bus), i2c_bus->base,
i2c_bus->speed);
return 0;
.id = UCLASS_I2C,
.of_match = mxc_i2c_ids,
.probe = mxc_i2c_probe,
- .priv_auto_alloc_size = sizeof(struct mxc_i2c_bus),
+ .priv_auto = sizeof(struct mxc_i2c_bus),
.ops = &mxc_i2c_ops,
+ .flags = DM_FLAG_PRE_RELOC,
};
#endif
projects / platform / kernel / u-boot.git / blobdiff