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immap_8260.h
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Stefan Roese authored
As discussed on the list, move "arch/ppc" to "arch/powerpc" to better match the Linux directory structure. Please note that this patch also changes the "ppc" target in MAKEALL to "powerpc" to match this new infrastructure. But "ppc" is kept as an alias for now, to not break compatibility with scripts using this name. Signed-off-by:
Stefan Roese <sr@denx.de> Acked-by:
Wolfgang Denk <wd@denx.de> Acked-by:
Detlev Zundel <dzu@denx.de> Acked-by:
Kim Phillips <kim.phillips@freescale.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Anatolij Gustschin <agust@denx.de>
Stefan Roese authoredAs discussed on the list, move "arch/ppc" to "arch/powerpc" to better match the Linux directory structure. Please note that this patch also changes the "ppc" target in MAKEALL to "powerpc" to match this new infrastructure. But "ppc" is kept as an alias for now, to not break compatibility with scripts using this name. Signed-off-by:
Stefan Roese <sr@denx.de> Acked-by:
Wolfgang Denk <wd@denx.de> Acked-by:
Detlev Zundel <dzu@denx.de> Acked-by:
Kim Phillips <kim.phillips@freescale.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Anatolij Gustschin <agust@denx.de>
fti2c010.c NaN GiB
/*
* Faraday I2C Controller
*
* (C) Copyright 2010 Faraday Technology
* Dante Su <dantesu@faraday-tech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*
* NOTE: This driver should be converted to driver model before June 2017.
* Please see doc/driver-model/i2c-howto.txt for instructions.
*/
#include <common.h>
#include <asm/io.h>
#include <i2c.h>
#include "fti2c010.h"
#ifndef CONFIG_SYS_I2C_SPEED
#define CONFIG_SYS_I2C_SPEED 5000
#endif
#ifndef CONFIG_SYS_I2C_SLAVE
#define CONFIG_SYS_I2C_SLAVE 0
#endif
#ifndef CONFIG_FTI2C010_CLOCK
#define CONFIG_FTI2C010_CLOCK clk_get_rate("I2C")
#endif
#ifndef CONFIG_FTI2C010_TIMEOUT
#define CONFIG_FTI2C010_TIMEOUT 10 /* ms */
#endif
/* 7-bit dev address + 1-bit read/write */
#define I2C_RD(dev) ((((dev) << 1) & 0xfe) | 1)
#define I2C_WR(dev) (((dev) << 1) & 0xfe)
struct fti2c010_chip {
struct fti2c010_regs *regs;
};
static struct fti2c010_chip chip_list[] = {
{
.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE,
},
#ifdef CONFIG_FTI2C010_BASE1
{
.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE1,
},
#endif
#ifdef CONFIG_FTI2C010_BASE2
{
.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE2,
},
#endif
#ifdef CONFIG_FTI2C010_BASE3
{
.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE3,
},
#endif
};
static int fti2c010_reset(struct fti2c010_chip *chip)
{
ulong ts;
int ret = -1;
struct fti2c010_regs *regs = chip->regs;
writel(CR_I2CRST, ®s->cr);
for (ts = get_timer(0); get_timer(ts) < CONFIG_FTI2C010_TIMEOUT; ) {
if (!(readl(®s->cr) & CR_I2CRST)) {
ret = 0;
break;
}
}
if (ret)
printf("fti2c010: reset timeout\n");
return ret;
}
static int fti2c010_wait(struct fti2c010_chip *chip, uint32_t mask)
{
int ret = -1;
uint32_t stat, ts;
struct fti2c010_regs *regs = chip->regs;
for (ts = get_timer(0); get_timer(ts) < CONFIG_FTI2C010_TIMEOUT; ) {
stat = readl(®s->sr);
if ((stat & mask) == mask) {
ret = 0;
break;
}
}
return ret;
}
static unsigned int set_i2c_bus_speed(struct fti2c010_chip *chip,
unsigned int speed)
{
struct fti2c010_regs *regs = chip->regs;
unsigned int clk = CONFIG_FTI2C010_CLOCK;
unsigned int gsr = 0;
unsigned int tsr = 32;
unsigned int div, rate;
for (div = 0; div < 0x3ffff; ++div) {
/* SCLout = PCLK/(2*(COUNT + 2) + GSR) */
rate = clk / (2 * (div + 2) + gsr);
if (rate <= speed)
break;
}
writel(TGSR_GSR(gsr) | TGSR_TSR(tsr), ®s->tgsr);
writel(CDR_DIV(div), ®s->cdr);
return rate;
}
/*
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.
*/
static void fti2c010_init(struct i2c_adapter *adap, int speed, int slaveaddr)
{
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
if (adap->init_done)
return;
#ifdef CONFIG_SYS_I2C_INIT_BOARD
/* Call board specific i2c bus reset routine before accessing the
* environment, which might be in a chip on that bus. For details
* about this problem see doc/I2C_Edge_Conditions.
*/
i2c_init_board();
#endif
/* master init */
fti2c010_reset(chip);
set_i2c_bus_speed(chip, speed);
/* slave init, don't care */
}
/*
* Probe the given I2C chip address. Returns 0 if a chip responded,
* not 0 on failure.
*/
static int fti2c010_probe(struct i2c_adapter *adap, u8 dev)
{
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
struct fti2c010_regs *regs = chip->regs;
int ret;
/* 1. Select slave device (7bits Address + 1bit R/W) */
writel(I2C_WR(dev), ®s->dr);
writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
return ret;
/* 2. Select device register */
writel(0, ®s->dr);
writel(CR_ENABLE | CR_TBEN, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
return ret;
}
static void to_i2c_addr(u8 *buf, uint32_t addr, int alen)
{
int i, shift;
if (!buf || alen <= 0)
return;
/* MSB first */
i = 0;
shift = (alen - 1) * 8;
while (alen-- > 0) {
buf[i] = (u8)(addr >> shift);
shift -= 8;
}
}
static int fti2c010_read(struct i2c_adapter *adap,
u8 dev, uint addr, int alen, uchar *buf, int len)
{
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
struct fti2c010_regs *regs = chip->regs;
int ret, pos;
uchar paddr[4] = { 0 };
to_i2c_addr(paddr, addr, alen);
/*
* Phase A. Set register address
*/
/* A.1 Select slave device (7bits Address + 1bit R/W) */
writel(I2C_WR(dev), ®s->dr);
writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
return ret;
/* A.2 Select device register */
for (pos = 0; pos < alen; ++pos) {
uint32_t ctrl = CR_ENABLE | CR_TBEN;
writel(paddr[pos], ®s->dr);
writel(ctrl, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
return ret;
}
/*
* Phase B. Get register data
*/
/* B.1 Select slave device (7bits Address + 1bit R/W) */
writel(I2C_RD(dev), ®s->dr);
writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
return ret;
/* B.2 Get register data */
for (pos = 0; pos < len; ++pos) {
uint32_t ctrl = CR_ENABLE | CR_TBEN;
uint32_t stat = SR_DR;
if (pos == len - 1) {
ctrl |= CR_NAK | CR_STOP;
stat |= SR_ACK;
}
writel(ctrl, ®s->cr);
ret = fti2c010_wait(chip, stat);
if (ret)
break;
buf[pos] = (uchar)(readl(®s->dr) & 0xFF);
}
return ret;
}
static int fti2c010_write(struct i2c_adapter *adap,
u8 dev, uint addr, int alen, u8 *buf, int len)
{
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
struct fti2c010_regs *regs = chip->regs;
int ret, pos;
uchar paddr[4] = { 0 };
to_i2c_addr(paddr, addr, alen);
/*
* Phase A. Set register address
*
* A.1 Select slave device (7bits Address + 1bit R/W)
*/
writel(I2C_WR(dev), ®s->dr);
writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
return ret;
/* A.2 Select device register */
for (pos = 0; pos < alen; ++pos) {
uint32_t ctrl = CR_ENABLE | CR_TBEN;
writel(paddr[pos], ®s->dr);
writel(ctrl, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
return ret;
}
/*
* Phase B. Set register data
*/
for (pos = 0; pos < len; ++pos) {
uint32_t ctrl = CR_ENABLE | CR_TBEN;
if (pos == len - 1)
ctrl |= CR_STOP;
writel(buf[pos], ®s->dr);
writel(ctrl, ®s->cr);
ret = fti2c010_wait(chip, SR_DT);
if (ret)
break;
}
return ret;
}
static unsigned int fti2c010_set_bus_speed(struct i2c_adapter *adap,
unsigned int speed)
{
struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
int ret;
fti2c010_reset(chip);
ret = set_i2c_bus_speed(chip, speed);
return ret;
}
/*
* Register i2c adapters
*/
U_BOOT_I2C_ADAP_COMPLETE(i2c_0, fti2c010_init, fti2c010_probe, fti2c010_read,
fti2c010_write, fti2c010_set_bus_speed,
CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
0)
#ifdef CONFIG_FTI2C010_BASE1
U_BOOT_I2C_ADAP_COMPLETE(i2c_1, fti2c010_init, fti2c010_probe, fti2c010_read,
fti2c010_write, fti2c010_set_bus_speed,
CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
1)
#endif
#ifdef CONFIG_FTI2C010_BASE2
U_BOOT_I2C_ADAP_COMPLETE(i2c_2, fti2c010_init, fti2c010_probe, fti2c010_read,
fti2c010_write, fti2c010_set_bus_speed,
CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
2)
#endif
#ifdef CONFIG_FTI2C010_BASE3
U_BOOT_I2C_ADAP_COMPLETE(i2c_3, fti2c010_init, fti2c010_probe, fti2c010_read,
fti2c010_write, fti2c010_set_bus_speed,
CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
3)
#endif