+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2013
* Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#ifdef CONFIG_DM_I2C
#include <dm.h>
-#include <fpgamap.h>
-#include "../misc/gdsys_soc.h"
+#include <regmap.h>
#else
#include <gdsys_fpga.h>
#endif
+#include <log.h>
#include <asm/unaligned.h>
+#include <linux/delay.h>
#ifdef CONFIG_DM_I2C
struct ihs_i2c_priv {
uint speed;
- phys_addr_t addr;
+ struct regmap *map;
};
-enum {
- REG_INTERRUPT_STATUS = 0x00,
- REG_INTERRUPT_ENABLE_CONTROL = 0x02,
- REG_WRITE_MAILBOX_EXT = 0x04,
- REG_WRITE_MAILBOX = 0x06,
- REG_READ_MAILBOX_EXT = 0x08,
- REG_READ_MAILBOX = 0x0A,
+struct ihs_i2c_regs {
+ u16 interrupt_status;
+ u16 interrupt_enable_control;
+ u16 write_mailbox_ext;
+ u16 write_mailbox;
+ u16 read_mailbox_ext;
+ u16 read_mailbox;
};
+#define ihs_i2c_set(map, member, val) \
+ regmap_set(map, struct ihs_i2c_regs, member, val)
+
+#define ihs_i2c_get(map, member, valp) \
+ regmap_get(map, struct ihs_i2c_regs, member, valp)
+
#else /* !CONFIG_DM_I2C */
DECLARE_GLOBAL_DATA_PTR;
uint ctr = 0;
#ifdef CONFIG_DM_I2C
struct ihs_i2c_priv *priv = dev_get_priv(dev);
- struct udevice *fpga;
-
- gdsys_soc_get_fpga(dev, &fpga);
#endif
#ifdef CONFIG_DM_I2C
- fpgamap_read16(fpga, priv->addr + REG_INTERRUPT_STATUS, &val);
+ ihs_i2c_get(priv->map, interrupt_status, &val);
#else
I2C_GET_REG(interrupt_status, &val);
#endif
while (!(val & (I2CINT_ERROR_EV
| (read ? I2CINT_RECEIVE_EV : I2CINT_TRANSMIT_EV)))) {
udelay(10);
- if (ctr++ > 5000)
- return 1;
+ if (ctr++ > 5000) {
+ debug("%s: timed out\n", __func__);
+ return -ETIMEDOUT;
+ }
#ifdef CONFIG_DM_I2C
- fpgamap_read16(fpga, priv->addr + REG_INTERRUPT_STATUS, &val);
+ ihs_i2c_get(priv->map, interrupt_status, &val);
#else
I2C_GET_REG(interrupt_status, &val);
#endif
}
- return (val & I2CINT_ERROR_EV) ? 1 : 0;
+ return (val & I2CINT_ERROR_EV) ? -EIO : 0;
}
#ifdef CONFIG_DM_I2C
#endif
{
u16 val;
+ u16 data;
+ int res;
#ifdef CONFIG_DM_I2C
struct ihs_i2c_priv *priv = dev_get_priv(dev);
- struct udevice *fpga;
-
- gdsys_soc_get_fpga(dev, &fpga);
#endif
/* Clear interrupt status */
+ data = I2CINT_ERROR_EV | I2CINT_RECEIVE_EV | I2CINT_TRANSMIT_EV;
#ifdef CONFIG_DM_I2C
- fpgamap_write16(fpga, priv->addr + REG_INTERRUPT_STATUS,
- I2CINT_ERROR_EV | I2CINT_RECEIVE_EV | I2CINT_TRANSMIT_EV);
- fpgamap_read16(fpga, priv->addr + REG_INTERRUPT_STATUS, &val);
+ ihs_i2c_set(priv->map, interrupt_status, data);
+ ihs_i2c_get(priv->map, interrupt_status, &val);
#else
- I2C_SET_REG(interrupt_status, I2CINT_ERROR_EV
- | I2CINT_RECEIVE_EV | I2CINT_TRANSMIT_EV);
+ I2C_SET_REG(interrupt_status, data);
I2C_GET_REG(interrupt_status, &val);
#endif
if (len > 1)
val |= buffer[1] << 8;
#ifdef CONFIG_DM_I2C
- fpgamap_write16(fpga, priv->addr + REG_WRITE_MAILBOX_EXT, val);
+ ihs_i2c_set(priv->map, write_mailbox_ext, val);
#else
I2C_SET_REG(write_mailbox_ext, val);
#endif
}
+ data = I2CMB_NATIVE
+ | (read ? 0 : I2CMB_WRITE)
+ | (chip << 1)
+ | ((len > 1) ? I2CMB_2BYTE : 0)
+ | (is_last ? 0 : I2CMB_HOLD_BUS);
+
#ifdef CONFIG_DM_I2C
- fpgamap_write16(fpga, priv->addr + REG_WRITE_MAILBOX,
- I2CMB_NATIVE
- | (read ? I2CMB_READ : I2CMB_WRITE)
- | (chip << 1)
- | ((len > 1) ? I2CMB_2BYTE : I2CMB_1BYTE)
- | (!is_last ? I2CMB_HOLD_BUS : I2CMB_DONT_HOLD_BUS));
+ ihs_i2c_set(priv->map, write_mailbox, data);
#else
- I2C_SET_REG(write_mailbox,
- I2CMB_NATIVE
- | (read ? 0 : I2CMB_WRITE)
- | (chip << 1)
- | ((len > 1) ? I2CMB_2BYTE : 0)
- | (is_last ? 0 : I2CMB_HOLD_BUS));
+ I2C_SET_REG(write_mailbox, data);
#endif
#ifdef CONFIG_DM_I2C
- if (wait_for_int(dev, read))
+ res = wait_for_int(dev, read);
#else
- if (wait_for_int(read))
+ res = wait_for_int(read);
#endif
- return 1;
+ if (res) {
+ if (res == -ETIMEDOUT)
+ debug("%s: time out while waiting for event\n", __func__);
+
+ return res;
+ }
/* If we want to read, get the bytes from the mailbox */
if (read) {
#ifdef CONFIG_DM_I2C
- fpgamap_read16(fpga, priv->addr + REG_READ_MAILBOX_EXT, &val);
+ ihs_i2c_get(priv->map, read_mailbox_ext, &val);
#else
I2C_GET_REG(read_mailbox_ext, &val);
#endif
int read)
#endif
{
+ int res;
+
while (len) {
int transfer = min(len, 2);
bool is_last = len <= transfer;
#ifdef CONFIG_DM_I2C
- if (ihs_i2c_transfer(dev, chip, data, transfer, read,
- hold_bus ? false : is_last))
- return 1;
+ res = ihs_i2c_transfer(dev, chip, data, transfer, read,
+ hold_bus ? false : is_last);
#else
- if (ihs_i2c_transfer(chip, data, transfer, read,
- hold_bus ? false : is_last))
- return 1;
+ res = ihs_i2c_transfer(chip, data, transfer, read,
+ hold_bus ? false : is_last);
#endif
+ if (res)
+ return res;
data += transfer;
len -= transfer;
int alen, uchar *buffer, int len, int read)
#endif
{
+ int res;
+
/* Don't hold the bus if length of data to send/receive is zero */
+ if (len <= 0)
+ return -EINVAL;
+
#ifdef CONFIG_DM_I2C
- if (len <= 0 || ihs_i2c_address(dev, chip, addr, alen, len))
- return 1;
+ res = ihs_i2c_address(dev, chip, addr, alen, len);
#else
- if (len <= 0 || ihs_i2c_address(chip, addr, alen, len))
- return 1;
+ res = ihs_i2c_address(chip, addr, alen, len);
#endif
+ if (res)
+ return res;
#ifdef CONFIG_DM_I2C
return ihs_i2c_send_buffer(dev, chip, buffer, len, false, read);
int ihs_i2c_probe(struct udevice *bus)
{
struct ihs_i2c_priv *priv = dev_get_priv(bus);
- int addr;
-
- addr = dev_read_u32_default(bus, "reg", -1);
- priv->addr = addr;
+ regmap_init_mem(dev_ofnode(bus), &priv->map);
return 0;
}
struct ihs_i2c_priv *priv = dev_get_priv(bus);
if (speed != priv->speed && priv->speed != 0)
- return 1;
+ return -EINVAL;
priv->speed = speed;
* actucal data) or one message (just data)
*/
if (nmsgs > 2 || nmsgs == 0) {
- debug("%s: Only one or two messages are supported.", __func__);
- return -1;
+ debug("%s: Only one or two messages are supported\n", __func__);
+ return -ENOTSUPP;
}
omsg = nmsgs == 1 ? &dummy : msg;
u32 chip_flags)
{
uchar buffer[2];
+ int res;
- if (ihs_i2c_transfer(bus, chip_addr, buffer, 0, I2COP_READ, true))
- return 1;
+ res = ihs_i2c_transfer(bus, chip_addr, buffer, 0, I2COP_READ, true);
+ if (res)
+ return res;
return 0;
}
static int ihs_i2c_probe(struct i2c_adapter *adap, uchar chip)
{
uchar buffer[2];
+ int res;
- if (ihs_i2c_transfer(chip, buffer, 0, I2COP_READ, true))
- return 1;
+ res = ihs_i2c_transfer(chip, buffer, 0, I2COP_READ, true);
+ if (res)
+ return res;
return 0;
}
unsigned int speed)
{
if (speed != adap->speed)
- return 1;
+ return -EINVAL;
return speed;
}
projects / oweals / u-boot.git / blobdiff