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i2c: mv_i2c.c: Add DM support

Browse source 
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>
Cc: Heiko Schocher <hs@denx.de>
This commit is contained in:
Stefan Roese 2016-09-16 15:07:52 +02:00 committed by Heiko Schocher
parent 7b46ee521e
commit 0c0f719ad2
1 changed files with 136 additions and 48 deletions
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184
drivers/i2c/mv_i2c.c
View file

@ -18,6 +18,7 @@
*/
#include <common.h>
#include <dm.h>
#include <i2c.h>
#include <asm/io.h>
#include "mv_i2c.h"
@ -30,6 +31,16 @@ struct mv_i2c_msg {
u8 data;
};
#ifdef CONFIG_ARMADA_3700
/* Armada 3700 has no padding between the registers */
struct mv_i2c {
u32 ibmr;
u32 idbr;
u32 icr;
u32 isr;
u32 isar;
};
#else
struct mv_i2c {
u32 ibmr;
u32 pad0;
@ -41,6 +52,15 @@ struct mv_i2c {
u32 pad3;
u32 isar;
};
#endif
/*
* Dummy implementation that can be overwritten by a board
* specific function
*/
__weak void i2c_clk_enable(void)
{
}
/*
* i2c_reset: - reset the host controller
@ -210,37 +230,13 @@ i2c_transfer_finish:
return ret;
}
static int __i2c_probe_chip(struct mv_i2c *base, uchar chip)
{
struct mv_i2c_msg msg;
i2c_reset(base);
msg.condition = I2C_COND_START;
msg.acknack = I2C_ACKNAK_WAITACK;
msg.direction = I2C_WRITE;
msg.data = (chip << 1) + 1;
if (i2c_transfer(base, &msg))
return -1;
msg.condition = I2C_COND_STOP;
msg.acknack = I2C_ACKNAK_SENDNAK;
msg.direction = I2C_READ;
msg.data = 0x00;
if (i2c_transfer(base, &msg))
return -1;
return 0;
}
static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen,
static int __i2c_read(struct mv_i2c *base, uchar chip, u8 *addr, int alen,
uchar *buffer, int len)
{
struct mv_i2c_msg msg;
u8 addr_bytes[3]; /* lowest...highest byte of data address */
debug("i2c_read(chip=0x%02x, addr=0x%02x, alen=0x%02x, "
"len=0x%02x)\n", chip, addr, alen, len);
"len=0x%02x)\n", chip, *addr, alen, len);
i2c_reset(base);
@ -258,17 +254,13 @@ static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen,
* send memory address bytes;
* alen defines how much bytes we have to send.
*/
/*addr &= ((1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)-1); */
addr_bytes[0] = (u8)((addr >> 0) & 0x000000FF);
addr_bytes[1] = (u8)((addr >> 8) & 0x000000FF);
addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF);
while (--alen >= 0) {
debug("i2c_read: send memory word address byte %1d\n", alen);
debug("i2c_read: send address byte %02x (alen=%d)\n",
*addr, alen);
msg.condition = I2C_COND_NORMAL;
msg.acknack = I2C_ACKNAK_WAITACK;
msg.direction = I2C_WRITE;
msg.data = addr_bytes[alen];
msg.data = *(addr++);
if (i2c_transfer(base, &msg))
return -1;
}
@ -299,8 +291,8 @@ static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen,
return -1;
*buffer = msg.data;
debug("i2c_read: reading byte (0x%08x)=0x%02x\n",
(unsigned int)buffer, *buffer);
debug("i2c_read: reading byte (%p)=0x%02x\n",
buffer, *buffer);
buffer++;
}
@ -309,14 +301,13 @@ static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen,
return 0;
}
static int __i2c_write(struct mv_i2c *base, uchar chip, uint addr, int alen,
static int __i2c_write(struct mv_i2c *base, uchar chip, u8 *addr, int alen,
uchar *buffer, int len)
{
struct mv_i2c_msg msg;
u8 addr_bytes[3]; /* lowest...highest byte of data address */
debug("i2c_write(chip=0x%02x, addr=0x%02x, alen=0x%02x, "
"len=0x%02x)\n", chip, addr, alen, len);
"len=0x%02x)\n", chip, *addr, alen, len);
i2c_reset(base);
@ -334,24 +325,21 @@ static int __i2c_write(struct mv_i2c *base, uchar chip, uint addr, int alen,
* send memory address bytes;
* alen defines how much bytes we have to send.
*/
addr_bytes[0] = (u8)((addr >> 0) & 0x000000FF);
addr_bytes[1] = (u8)((addr >> 8) & 0x000000FF);
addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF);
while (--alen >= 0) {
debug("i2c_write: send memory word address\n");
debug("i2c_read: send address byte %02x (alen=%d)\n",
*addr, alen);
msg.condition = I2C_COND_NORMAL;
msg.acknack = I2C_ACKNAK_WAITACK;
msg.direction = I2C_WRITE;
msg.data = addr_bytes[alen];
msg.data = *(addr++);
if (i2c_transfer(base, &msg))
return -1;
}
/* write bytes; send NACK at last byte */
while (len--) {
debug("i2c_write: writing byte (0x%08x)=0x%02x\n",
(unsigned int)buffer, *buffer);
debug("i2c_write: writing byte (%p)=0x%02x\n",
buffer, *buffer);
if (len == 0)
msg.condition = I2C_COND_STOP;
@ -371,6 +359,8 @@ static int __i2c_write(struct mv_i2c *base, uchar chip, uint addr, int alen,
return 0;
}
#ifndef CONFIG_DM_I2C
static struct mv_i2c *base_glob;
static void i2c_board_init(struct mv_i2c *base)
@ -436,6 +426,29 @@ void i2c_init(int speed, int slaveaddr)
i2c_board_init(base_glob);
}
static int __i2c_probe_chip(struct mv_i2c *base, uchar chip)
{
struct mv_i2c_msg msg;
i2c_reset(base);
msg.condition = I2C_COND_START;
msg.acknack = I2C_ACKNAK_WAITACK;
msg.direction = I2C_WRITE;
msg.data = (chip << 1) + 1;
if (i2c_transfer(base, &msg))
return -1;
msg.condition = I2C_COND_STOP;
msg.acknack = I2C_ACKNAK_SENDNAK;
msg.direction = I2C_READ;
msg.data = 0x00;
if (i2c_transfer(base, &msg))
return -1;
return 0;
}
/*
* i2c_probe: - Test if a chip answers for a given i2c address
*
@ -462,7 +475,14 @@ int i2c_probe(uchar chip)
*/
int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
{
return __i2c_read(base_glob, chip, addr, alen, buffer, len);
u8 addr_bytes[4];
addr_bytes[0] = (addr >> 0) & 0xFF;
addr_bytes[1] = (addr >> 8) & 0xFF;
addr_bytes[2] = (addr >> 16) & 0xFF;
addr_bytes[3] = (addr >> 24) & 0xFF;
return __i2c_read(base_glob, chip, addr_bytes, alen, buffer, len);
}
/*
@ -480,5 +500,73 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
*/
int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
{
return __i2c_write(base_glob, chip, addr, alen, buffer, len);
u8 addr_bytes[4];
addr_bytes[0] = (addr >> 0) & 0xFF;
addr_bytes[1] = (addr >> 8) & 0xFF;
addr_bytes[2] = (addr >> 16) & 0xFF;
addr_bytes[3] = (addr >> 24) & 0xFF;
return __i2c_write(base_glob, chip, addr_bytes, alen, buffer, len);
}
#else /* CONFIG_DM_I2C */
struct mv_i2c_priv {
struct mv_i2c *base;
};
static int mv_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
{
struct mv_i2c_priv *i2c = 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
* actual data) or one message (just data or offset/data combined)
*/
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(i2c->base, dmsg->addr, omsg->buf,
omsg->len, dmsg->buf, dmsg->len);
else
return __i2c_write(i2c->base, dmsg->addr, omsg->buf,
omsg->len, dmsg->buf, dmsg->len);
}
static int mv_i2c_probe(struct udevice *bus)
{
struct mv_i2c_priv *priv = dev_get_priv(bus);
priv->base = (void *)dev_get_addr_ptr(bus);
return 0;
}
static const struct dm_i2c_ops mv_i2c_ops = {
.xfer = mv_i2c_xfer,
};
static const struct udevice_id mv_i2c_ids[] = {
{ .compatible = "marvell,armada-3700-i2c" },
{ }
};
U_BOOT_DRIVER(i2c_mv) = {
.name = "i2c_mv",
.id = UCLASS_I2C,
.of_match = mv_i2c_ids,
.probe = mv_i2c_probe,
.priv_auto_alloc_size = sizeof(struct mv_i2c_priv),
.ops = &mv_i2c_ops,
};
#endif /* CONFIG_DM_I2C */