Signed-off-by: Mario Six <mario....@gdsys.cc>
---
arch/powerpc/include/asm/fsl_i2c.h | 10 ++++
drivers/i2c/Kconfig | 7 +++
drivers/i2c/fsl_i2c.c | 103 +++++++++++++++++++++++++++++++++++++
3 files changed, 120 insertions(+)
diff --git a/arch/powerpc/include/asm/fsl_i2c.h
b/arch/powerpc/include/asm/fsl_i2c.h
index e94bdc6..d2586f9 100644
--- a/arch/powerpc/include/asm/fsl_i2c.h
+++ b/arch/powerpc/include/asm/fsl_i2c.h
@@ -68,4 +68,14 @@ typedef struct fsl_i2c_base {
u8 res6[0xE8];
} fsl_i2c_t;
+#ifdef CONFIG_DM_I2C
+struct fsl_i2c_dev {
+ struct fsl_i2c_base __iomem *base; /* register base */
+ u32 i2c_clk;
+ u32 index;
+ u8 slaveadd;
+ uint speed;
+};
+#endif
+
#endif /* _ASM_I2C_H_ */
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 9324c6c..ffe18f7 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -58,6 +58,13 @@ config DM_I2C_GPIO
bindings are supported.
Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
+config SYS_I2C_FSL
+ bool "Freescale I2C bus driver"
+ depends on DM_I2C
+ help
+ Add support for Freescale I2C busses as used on MPC8240, MPC8245, and
+ MPC85xx processors.
+
config SYS_I2C_CADENCE
tristate "Cadence I2C Controller"
depends on DM_I2C && (ARCH_ZYNQ || ARM64)
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 7d99f48..b8cc647 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -12,6 +12,8 @@
#include <i2c.h> /* Functional interface */
#include <asm/io.h>
#include <asm/fsl_i2c.h> /* HW definitions */
+#include <dm.h>
+#include <mapmem.h>
/* The maximum number of microseconds we will wait until another master has
* released the bus. If not defined in the board header file, then use a
@@ -34,6 +36,7 @@
DECLARE_GLOBAL_DATA_PTR;
+#ifndef CONFIG_DM_I2C
static const struct fsl_i2c_base *i2c_base[4] = {
(struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C_OFFSET),
#ifdef CONFIG_SYS_FSL_I2C2_OFFSET
@@ -46,6 +49,7 @@ static const struct fsl_i2c_base *i2c_base[4] = {
(struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C4_OFFSET)
#endif
};
+#endif
/* I2C speed map for a DFSR value of 1 */
@@ -192,6 +196,7 @@ static unsigned int set_i2c_bus_speed(const struct
fsl_i2c_base *base,
return speed;
}
+#ifndef CONFIG_DM_I2C
static unsigned int get_i2c_clock(int bus)
{
if (bus)
@@ -199,6 +204,7 @@ static unsigned int get_i2c_clock(int bus)
else
return gd->arch.i2c1_clk; /* I2C1 clock */
}
+#endif
static int fsl_i2c_fixup(const struct fsl_i2c_base *base)
{
@@ -497,6 +503,7 @@ static unsigned int __i2c_set_bus_speed(const struct
fsl_i2c_base *base,
return 0;
}
+#ifndef CONFIG_DM_I2C
static void fsl_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
{
__i2c_init(i2c_base[adap->hwadapnr], speed, slaveadd,
@@ -559,3 +566,99 @@ U_BOOT_I2C_ADAP_COMPLETE(fsl_3, fsl_i2c_init,
fsl_i2c_probe_chip, fsl_i2c_read,
CONFIG_SYS_FSL_I2C4_SPEED, CONFIG_SYS_FSL_I2C4_SLAVE,
3)
#endif
+#else /* CONFIG_DM_I2C */
+static int fsl_i2c_probe_chip(struct udevice *bus, u32 chip_addr,
+ u32 chip_flags)
+{
+ struct fsl_i2c_dev *dev = dev_get_priv(bus);
+ return __i2c_probe_chip(dev->base, chip_addr);
+}
+
+static int fsl_i2c_set_bus_speed(struct udevice *bus, unsigned int speed)
+{
+ struct fsl_i2c_dev *dev = dev_get_priv(bus);
+ return __i2c_set_bus_speed(dev->base, speed, dev->i2c_clk);
+}
+
+static int fsl_i2c_ofdata_to_platdata(struct udevice *bus)
+{
+ struct fsl_i2c_dev *dev = dev_get_priv(bus);
+ u64 reg;
+ u32 addr, size;
+
+ reg = fdtdec_get_addr(gd->fdt_blob, bus->of_offset, "reg");
+ addr = reg >> 32;
+ size = reg & 0xFFFFFFFF;
+
+ dev->base = map_sysmem(CONFIG_SYS_IMMR + addr, size);
+
+ if (!dev->base)
+ return -ENOMEM;
+
+ dev->index = fdtdec_get_int(gd->fdt_blob, bus->of_offset,
+ "cell-index", -1);
+ dev->slaveadd = fdtdec_get_int(gd->fdt_blob, bus->of_offset,
+ "u-boot,i2c-slave-addr", 0x7f);
+ dev->speed = fdtdec_get_int(gd->fdt_blob, bus->of_offset,
+ "clock-frequency", 400000);
+
+ dev->i2c_clk = dev->index ? gd->arch.i2c2_clk : gd->arch.i2c1_clk;
+
+ return 0;
+}
+
+static int fsl_i2c_probe(struct udevice *bus)
+{
+ struct fsl_i2c_dev *dev = dev_get_priv(bus);
+ __i2c_init(dev->base, dev->speed, dev->slaveadd, dev->i2c_clk,
+ dev->index);
+ return 0;
+}
+
+static int fsl_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
+{
+ struct fsl_i2c_dev *dev = dev_get_priv(bus);
+ struct i2c_msg *dmsg, *omsg, dummy;
+
+ memset(&dummy, 0, sizeof(struct i2c_msg));
+
+ /* We expect either two messages (one with an offset and one with the
+ * actucal data) or one message (just data) */
+ if (nmsgs > 2 || nmsgs == 0) {
+ debug("%s: Only one or two messages are supported.", __func__);
+ return -1;
+ }
+
+ omsg = nmsgs == 1 ? &dummy : msg;
+ dmsg = nmsgs == 1 ? msg : msg + 1;
+
+ if (dmsg->flags & I2C_M_RD)
+ return __i2c_read(dev->base, dmsg->addr, omsg->buf, omsg->len,
+ dmsg->buf, dmsg->len);
+ else
+ return __i2c_write(dev->base, dmsg->addr, omsg->buf, omsg->len,
+ dmsg->buf, dmsg->len);
+}
+
+static const struct dm_i2c_ops fsl_i2c_ops = {
+ .xfer = fsl_i2c_xfer,
+ .probe_chip = fsl_i2c_probe_chip,
+ .set_bus_speed = fsl_i2c_set_bus_speed,
+};
+
+static const struct udevice_id fsl_i2c_ids[] = {
+ { .compatible = "fsl-i2c", },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(i2c_fsl) = {
+ .name = "i2c_fsl",
+ .id = UCLASS_I2C,
+ .of_match = fsl_i2c_ids,
+ .probe = fsl_i2c_probe,
+ .ofdata_to_platdata = fsl_i2c_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct fsl_i2c_dev),
+ .ops = &fsl_i2c_ops,
+};
+
+#endif /* CONFIG_DM_I2C */
