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u-boot/drivers/spi/omap3_spi.c
Lukasz Majewski 56c4046038 spi: Convert CONFIG_DM_SPI* to CONFIG_$(SPL_TPL_)DM_SPI* 
This change allows more fine tuning of driver model based SPI support in
SPL and TPL. It is now possible to explicitly enable/disable the DM_SPI
support in SPL and TPL via Kconfig option.

Before this change it was necessary to use:
    /* SPI Flash Configs */
    #if defined(CONFIG_SPL_BUILD)
    #undef CONFIG_DM_SPI
    #undef CONFIG_DM_SPI_FLASH
    #undef CONFIG_SPI_FLASH_MTD
    #endif

in the ./include/configs/<board>.h, which is error prone and shall be
avoided when we strive to switch to Kconfig.

The goal of this patch:

Provide distinction for DM_SPI support in both U-Boot proper and SPL (TPL).
Valid use case is when U-Boot proper wants to use DM_SPI, but SPL must
still support non DM driver.

Another use case is the conversion of non DM/DTS SPI driver to support
DM/DTS. When such driver needs to work in both SPL and U-Boot proper, the
distinction is needed in Kconfig (also if SPL version of the driver
supports OF_PLATDATA).

In the end of the day one would have to support following use cases (in
single driver file - e.g. mxs_spi.c):

- U-Boot proper driver supporting DT/DTS
- U-Boot proper driver without DT/DTS support (deprecated)
- SPL driver without DT/DTS support
- SPL (and TPL) driver with DT/DTS (when the SoC has enough resources to
  run full blown DT/DTS)
- SPL driver with DT/DTS and SPL_OF_PLATDATA (when one have constrained
  environment with no fitImage and OF_LIBFDT support).

Some boards do require SPI support (with DM) in SPL (TPL) and some only
have DM_SPI{_FLASH} defined to allow compiling SPL.

This patch converts #ifdef CONFIG_DM_SPI* to #if CONFIG_IS_ENABLED(DM_SPI)
and provides corresponding defines in Kconfig.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Tested-by: Adam Ford <aford173@gmail.com> #da850-evm
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[trini: Fixup a few platforms]
Signed-off-by: Tom Rini <trini@konsulko.com>
2020-06-29 13:34:43 -04:00

704 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Jagan Teki <jteki@openedev.com>
* Christophe Ricard <christophe.ricard@gmail.com>
*
* Copyright (C) 2010 Dirk Behme <dirk.behme@googlemail.com>
*
* Driver for McSPI controller on OMAP3. Based on davinci_spi.c
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
*
* Copyright (C) 2007 Atmel Corporation
*
* Parts taken from linux/drivers/spi/omap2_mcspi.c
* Copyright (C) 2005, 2006 Nokia Corporation
*
* Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
*/
#include <common.h>
#include <dm.h>
#include <spi.h>
#include <malloc.h>
#include <asm/io.h>
#include <linux/bitops.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_AM33XX) || defined(CONFIG_AM43XX)
#define OMAP3_MCSPI1_BASE 0x48030100
#define OMAP3_MCSPI2_BASE 0x481A0100
#else
#define OMAP3_MCSPI1_BASE 0x48098000
#define OMAP3_MCSPI2_BASE 0x4809A000
#define OMAP3_MCSPI3_BASE 0x480B8000
#define OMAP3_MCSPI4_BASE 0x480BA000
#endif
#define OMAP4_MCSPI_REG_OFFSET 0x100
struct omap2_mcspi_platform_config {
unsigned int regs_offset;
};
/* per-register bitmasks */
#define OMAP3_MCSPI_SYSCONFIG_SMARTIDLE (2 << 3)
#define OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP BIT(2)
#define OMAP3_MCSPI_SYSCONFIG_AUTOIDLE BIT(0)
#define OMAP3_MCSPI_SYSCONFIG_SOFTRESET BIT(1)
#define OMAP3_MCSPI_SYSSTATUS_RESETDONE BIT(0)
#define OMAP3_MCSPI_MODULCTRL_SINGLE BIT(0)
#define OMAP3_MCSPI_MODULCTRL_MS BIT(2)
#define OMAP3_MCSPI_MODULCTRL_STEST BIT(3)
#define OMAP3_MCSPI_CHCONF_PHA BIT(0)
#define OMAP3_MCSPI_CHCONF_POL BIT(1)
#define OMAP3_MCSPI_CHCONF_CLKD_MASK GENMASK(5, 2)
#define OMAP3_MCSPI_CHCONF_EPOL BIT(6)
#define OMAP3_MCSPI_CHCONF_WL_MASK GENMASK(11, 7)
#define OMAP3_MCSPI_CHCONF_TRM_RX_ONLY BIT(12)
#define OMAP3_MCSPI_CHCONF_TRM_TX_ONLY BIT(13)
#define OMAP3_MCSPI_CHCONF_TRM_MASK GENMASK(13, 12)
#define OMAP3_MCSPI_CHCONF_DMAW BIT(14)
#define OMAP3_MCSPI_CHCONF_DMAR BIT(15)
#define OMAP3_MCSPI_CHCONF_DPE0 BIT(16)
#define OMAP3_MCSPI_CHCONF_DPE1 BIT(17)
#define OMAP3_MCSPI_CHCONF_IS BIT(18)
#define OMAP3_MCSPI_CHCONF_TURBO BIT(19)
#define OMAP3_MCSPI_CHCONF_FORCE BIT(20)
#define OMAP3_MCSPI_CHSTAT_RXS BIT(0)
#define OMAP3_MCSPI_CHSTAT_TXS BIT(1)
#define OMAP3_MCSPI_CHSTAT_EOT BIT(2)
#define OMAP3_MCSPI_CHCTRL_EN BIT(0)
#define OMAP3_MCSPI_CHCTRL_DIS (0 << 0)
#define OMAP3_MCSPI_WAKEUPENABLE_WKEN BIT(0)
#define MCSPI_PINDIR_D0_IN_D1_OUT 0
#define MCSPI_PINDIR_D0_OUT_D1_IN 1
#define OMAP3_MCSPI_MAX_FREQ 48000000
#define SPI_WAIT_TIMEOUT 10
/* OMAP3 McSPI registers */
struct mcspi_channel {
unsigned int chconf; /* 0x2C, 0x40, 0x54, 0x68 */
unsigned int chstat; /* 0x30, 0x44, 0x58, 0x6C */
unsigned int chctrl; /* 0x34, 0x48, 0x5C, 0x70 */
unsigned int tx; /* 0x38, 0x4C, 0x60, 0x74 */
unsigned int rx; /* 0x3C, 0x50, 0x64, 0x78 */
};
struct mcspi {
unsigned char res1[0x10];
unsigned int sysconfig; /* 0x10 */
unsigned int sysstatus; /* 0x14 */
unsigned int irqstatus; /* 0x18 */
unsigned int irqenable; /* 0x1C */
unsigned int wakeupenable; /* 0x20 */
unsigned int syst; /* 0x24 */
unsigned int modulctrl; /* 0x28 */
struct mcspi_channel channel[4];
/* channel0: 0x2C - 0x3C, bus 0 & 1 & 2 & 3 */
/* channel1: 0x40 - 0x50, bus 0 & 1 */
/* channel2: 0x54 - 0x64, bus 0 & 1 */
/* channel3: 0x68 - 0x78, bus 0 */
};
struct omap3_spi_priv {
#if !CONFIG_IS_ENABLED(DM_SPI)
struct spi_slave slave;
#endif
struct mcspi *regs;
unsigned int cs;
unsigned int freq;
unsigned int mode;
unsigned int wordlen;
unsigned int pin_dir:1;
};
static void omap3_spi_write_chconf(struct omap3_spi_priv *priv, int val)
{
writel(val, &priv->regs->channel[priv->cs].chconf);
/* Flash post writes to make immediate effect */
readl(&priv->regs->channel[priv->cs].chconf);
}
static void omap3_spi_set_enable(struct omap3_spi_priv *priv, int enable)
{
writel(enable, &priv->regs->channel[priv->cs].chctrl);
/* Flash post writes to make immediate effect */
readl(&priv->regs->channel[priv->cs].chctrl);
}
static int omap3_spi_write(struct omap3_spi_priv *priv, unsigned int len,
const void *txp, unsigned long flags)
{
ulong start;
int i, chconf;
chconf = readl(&priv->regs->channel[priv->cs].chconf);
/* Enable the channel */
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_EN);
chconf &= ~(OMAP3_MCSPI_CHCONF_TRM_MASK | OMAP3_MCSPI_CHCONF_WL_MASK);
chconf |= (priv->wordlen - 1) << 7;
chconf |= OMAP3_MCSPI_CHCONF_TRM_TX_ONLY;
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
for (i = 0; i < len; i++) {
/* wait till TX register is empty (TXS == 1) */
start = get_timer(0);
while (!(readl(&priv->regs->channel[priv->cs].chstat) &
OMAP3_MCSPI_CHSTAT_TXS)) {
if (get_timer(start) > SPI_WAIT_TIMEOUT) {
printf("SPI TXS timed out, status=0x%08x\n",
readl(&priv->regs->channel[priv->cs].chstat));
return -1;
}
}
/* Write the data */
unsigned int *tx = &priv->regs->channel[priv->cs].tx;
if (priv->wordlen > 16)
writel(((u32 *)txp)[i], tx);
else if (priv->wordlen > 8)
writel(((u16 *)txp)[i], tx);
else
writel(((u8 *)txp)[i], tx);
}
/* wait to finish of transfer */
while ((readl(&priv->regs->channel[priv->cs].chstat) &
(OMAP3_MCSPI_CHSTAT_EOT | OMAP3_MCSPI_CHSTAT_TXS)) !=
(OMAP3_MCSPI_CHSTAT_EOT | OMAP3_MCSPI_CHSTAT_TXS))
;
/* Disable the channel otherwise the next immediate RX will get affected */
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_DIS);
if (flags & SPI_XFER_END) {
chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
}
return 0;
}
static int omap3_spi_read(struct omap3_spi_priv *priv, unsigned int len,
void *rxp, unsigned long flags)
{
int i, chconf;
ulong start;
chconf = readl(&priv->regs->channel[priv->cs].chconf);
/* Enable the channel */
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_EN);
chconf &= ~(OMAP3_MCSPI_CHCONF_TRM_MASK | OMAP3_MCSPI_CHCONF_WL_MASK);
chconf |= (priv->wordlen - 1) << 7;
chconf |= OMAP3_MCSPI_CHCONF_TRM_RX_ONLY;
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
writel(0, &priv->regs->channel[priv->cs].tx);
for (i = 0; i < len; i++) {
start = get_timer(0);
/* Wait till RX register contains data (RXS == 1) */
while (!(readl(&priv->regs->channel[priv->cs].chstat) &
OMAP3_MCSPI_CHSTAT_RXS)) {
if (get_timer(start) > SPI_WAIT_TIMEOUT) {
printf("SPI RXS timed out, status=0x%08x\n",
readl(&priv->regs->channel[priv->cs].chstat));
return -1;
}
}
/* Disable the channel to prevent furher receiving */
if (i == (len - 1))
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_DIS);
/* Read the data */
unsigned int *rx = &priv->regs->channel[priv->cs].rx;
if (priv->wordlen > 16)
((u32 *)rxp)[i] = readl(rx);
else if (priv->wordlen > 8)
((u16 *)rxp)[i] = (u16)readl(rx);
else
((u8 *)rxp)[i] = (u8)readl(rx);
}
if (flags & SPI_XFER_END) {
chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
}
return 0;
}
/*McSPI Transmit Receive Mode*/
static int omap3_spi_txrx(struct omap3_spi_priv *priv, unsigned int len,
const void *txp, void *rxp, unsigned long flags)
{
ulong start;
int chconf, i = 0;
chconf = readl(&priv->regs->channel[priv->cs].chconf);
/*Enable SPI channel*/
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_EN);
/*set TRANSMIT-RECEIVE Mode*/
chconf &= ~(OMAP3_MCSPI_CHCONF_TRM_MASK | OMAP3_MCSPI_CHCONF_WL_MASK);
chconf |= (priv->wordlen - 1) << 7;
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
/*Shift in and out 1 byte at time*/
for (i=0; i < len; i++){
/* Write: wait for TX empty (TXS == 1)*/
start = get_timer(0);
while (!(readl(&priv->regs->channel[priv->cs].chstat) &
OMAP3_MCSPI_CHSTAT_TXS)) {
if (get_timer(start) > SPI_WAIT_TIMEOUT) {
printf("SPI TXS timed out, status=0x%08x\n",
readl(&priv->regs->channel[priv->cs].chstat));
return -1;
}
}
/* Write the data */
unsigned int *tx = &priv->regs->channel[priv->cs].tx;
if (priv->wordlen > 16)
writel(((u32 *)txp)[i], tx);
else if (priv->wordlen > 8)
writel(((u16 *)txp)[i], tx);
else
writel(((u8 *)txp)[i], tx);
/*Read: wait for RX containing data (RXS == 1)*/
start = get_timer(0);
while (!(readl(&priv->regs->channel[priv->cs].chstat) &
OMAP3_MCSPI_CHSTAT_RXS)) {
if (get_timer(start) > SPI_WAIT_TIMEOUT) {
printf("SPI RXS timed out, status=0x%08x\n",
readl(&priv->regs->channel[priv->cs].chstat));
return -1;
}
}
/* Read the data */
unsigned int *rx = &priv->regs->channel[priv->cs].rx;
if (priv->wordlen > 16)
((u32 *)rxp)[i] = readl(rx);
else if (priv->wordlen > 8)
((u16 *)rxp)[i] = (u16)readl(rx);
else
((u8 *)rxp)[i] = (u8)readl(rx);
}
/* Disable the channel */
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_DIS);
/*if transfer must be terminated disable the channel*/
if (flags & SPI_XFER_END) {
chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
}
return 0;
}
static int _spi_xfer(struct omap3_spi_priv *priv, unsigned int bitlen,
const void *dout, void *din, unsigned long flags)
{
unsigned int len;
int ret = -1;
if (priv->wordlen < 4 || priv->wordlen > 32) {
printf("omap3_spi: invalid wordlen %d\n", priv->wordlen);
return -1;
}
if (bitlen % priv->wordlen)
return -1;
len = bitlen / priv->wordlen;
if (bitlen == 0) { /* only change CS */
int chconf = readl(&priv->regs->channel[priv->cs].chconf);
if (flags & SPI_XFER_BEGIN) {
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_EN);
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
}
if (flags & SPI_XFER_END) {
chconf &= ~OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(priv, chconf);
omap3_spi_set_enable(priv, OMAP3_MCSPI_CHCTRL_DIS);
}
ret = 0;
} else {
if (dout != NULL && din != NULL)
ret = omap3_spi_txrx(priv, len, dout, din, flags);
else if (dout != NULL)
ret = omap3_spi_write(priv, len, dout, flags);
else if (din != NULL)
ret = omap3_spi_read(priv, len, din, flags);
}
return ret;
}
static void _omap3_spi_set_speed(struct omap3_spi_priv *priv)
{
uint32_t confr, div = 0;
confr = readl(&priv->regs->channel[priv->cs].chconf);
/* Calculate clock divisor. Valid range: 0x0 - 0xC ( /1 - /4096 ) */
if (priv->freq) {
while (div <= 0xC && (OMAP3_MCSPI_MAX_FREQ / (1 << div))
> priv->freq)
div++;
} else {
div = 0xC;
}
/* set clock divisor */
confr &= ~OMAP3_MCSPI_CHCONF_CLKD_MASK;
confr |= div << 2;
omap3_spi_write_chconf(priv, confr);
}
static void _omap3_spi_set_mode(struct omap3_spi_priv *priv)
{
uint32_t confr;
confr = readl(&priv->regs->channel[priv->cs].chconf);
/* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS
* REVISIT: this controller could support SPI_3WIRE mode.
*/
if (priv->pin_dir == MCSPI_PINDIR_D0_IN_D1_OUT) {
confr &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1);
confr |= OMAP3_MCSPI_CHCONF_DPE0;
} else {
confr &= ~OMAP3_MCSPI_CHCONF_DPE0;
confr |= OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1;
}
/* set SPI mode 0..3 */
confr &= ~(OMAP3_MCSPI_CHCONF_POL | OMAP3_MCSPI_CHCONF_PHA);
if (priv->mode & SPI_CPHA)
confr |= OMAP3_MCSPI_CHCONF_PHA;
if (priv->mode & SPI_CPOL)
confr |= OMAP3_MCSPI_CHCONF_POL;
/* set chipselect polarity; manage with FORCE */
if (!(priv->mode & SPI_CS_HIGH))
confr |= OMAP3_MCSPI_CHCONF_EPOL; /* active-low; normal */
else
confr &= ~OMAP3_MCSPI_CHCONF_EPOL;
/* Transmit & receive mode */
confr &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
omap3_spi_write_chconf(priv, confr);
}
static void _omap3_spi_set_wordlen(struct omap3_spi_priv *priv)
{
unsigned int confr;
/* McSPI individual channel configuration */
confr = readl(&priv->regs->channel[priv->cs].chconf);
/* wordlength */
confr &= ~OMAP3_MCSPI_CHCONF_WL_MASK;
confr |= (priv->wordlen - 1) << 7;
omap3_spi_write_chconf(priv, confr);
}
static void spi_reset(struct mcspi *regs)
{
unsigned int tmp;
writel(OMAP3_MCSPI_SYSCONFIG_SOFTRESET, &regs->sysconfig);
do {
tmp = readl(&regs->sysstatus);
} while (!(tmp & OMAP3_MCSPI_SYSSTATUS_RESETDONE));
writel(OMAP3_MCSPI_SYSCONFIG_AUTOIDLE |
OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP |
OMAP3_MCSPI_SYSCONFIG_SMARTIDLE, &regs->sysconfig);
writel(OMAP3_MCSPI_WAKEUPENABLE_WKEN, &regs->wakeupenable);
}
static void _omap3_spi_claim_bus(struct omap3_spi_priv *priv)
{
unsigned int conf;
/*
* setup when switching from (reset default) slave mode
* to single-channel master mode
*/
conf = readl(&priv->regs->modulctrl);
conf &= ~(OMAP3_MCSPI_MODULCTRL_STEST | OMAP3_MCSPI_MODULCTRL_MS);
conf |= OMAP3_MCSPI_MODULCTRL_SINGLE;
writel(conf, &priv->regs->modulctrl);
}
#if !CONFIG_IS_ENABLED(DM_SPI)
static inline struct omap3_spi_priv *to_omap3_spi(struct spi_slave *slave)
{
return container_of(slave, struct omap3_spi_priv, slave);
}
void spi_free_slave(struct spi_slave *slave)
{
struct omap3_spi_priv *priv = to_omap3_spi(slave);
free(priv);
}
int spi_claim_bus(struct spi_slave *slave)
{
struct omap3_spi_priv *priv = to_omap3_spi(slave);
spi_reset(priv->regs);
_omap3_spi_claim_bus(priv);
_omap3_spi_set_wordlen(priv);
_omap3_spi_set_mode(priv);
_omap3_spi_set_speed(priv);
return 0;
}
void spi_release_bus(struct spi_slave *slave)
{
struct omap3_spi_priv *priv = to_omap3_spi(slave);
writel(OMAP3_MCSPI_MODULCTRL_MS, &priv->regs->modulctrl);
}
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int mode)
{
struct omap3_spi_priv *priv;
struct mcspi *regs;
/*
* OMAP3 McSPI (MultiChannel SPI) has 4 busses (modules)
* with different number of chip selects (CS, channels):
* McSPI1 has 4 CS (bus 0, cs 0 - 3)
* McSPI2 has 2 CS (bus 1, cs 0 - 1)
* McSPI3 has 2 CS (bus 2, cs 0 - 1)
* McSPI4 has 1 CS (bus 3, cs 0)
*/
switch (bus) {
case 0:
regs = (struct mcspi *)OMAP3_MCSPI1_BASE;
break;
#ifdef OMAP3_MCSPI2_BASE
case 1:
regs = (struct mcspi *)OMAP3_MCSPI2_BASE;
break;
#endif
#ifdef OMAP3_MCSPI3_BASE
case 2:
regs = (struct mcspi *)OMAP3_MCSPI3_BASE;
break;
#endif
#ifdef OMAP3_MCSPI4_BASE
case 3:
regs = (struct mcspi *)OMAP3_MCSPI4_BASE;
break;
#endif
default:
printf("SPI error: unsupported bus %i. Supported busses 0 - 3\n", bus);
return NULL;
}
if (((bus == 0) && (cs > 3)) ||
((bus == 1) && (cs > 1)) ||
((bus == 2) && (cs > 1)) ||
((bus == 3) && (cs > 0))) {
printf("SPI error: unsupported chip select %i on bus %i\n", cs, bus);
return NULL;
}
if (max_hz > OMAP3_MCSPI_MAX_FREQ) {
printf("SPI error: unsupported frequency %i Hz. Max frequency is 48 MHz\n",
max_hz);
return NULL;
}
if (mode > SPI_MODE_3) {
printf("SPI error: unsupported SPI mode %i\n", mode);
return NULL;
}
priv = spi_alloc_slave(struct omap3_spi_priv, bus, cs);
if (!priv) {
printf("SPI error: malloc of SPI structure failed\n");
return NULL;
}
priv->regs = regs;
priv->cs = cs;
priv->freq = max_hz;
priv->mode = mode;
priv->wordlen = priv->slave.wordlen;
#if 0
/* Please migrate to DM_SPI support for this feature. */
priv->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN;
#endif
return &priv->slave;
}
int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
const void *dout, void *din, unsigned long flags)
{
struct omap3_spi_priv *priv = to_omap3_spi(slave);
return _spi_xfer(priv, bitlen, dout, din, flags);
}
#else
static int omap3_spi_claim_bus(struct udevice *dev)
{
struct udevice *bus = dev->parent;
struct omap3_spi_priv *priv = dev_get_priv(bus);
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
priv->cs = slave_plat->cs;
priv->freq = slave_plat->max_hz;
_omap3_spi_claim_bus(priv);
return 0;
}
static int omap3_spi_release_bus(struct udevice *dev)
{
struct udevice *bus = dev->parent;
struct omap3_spi_priv *priv = dev_get_priv(bus);
writel(OMAP3_MCSPI_MODULCTRL_MS, &priv->regs->modulctrl);
return 0;
}
static int omap3_spi_set_wordlen(struct udevice *dev, unsigned int wordlen)
{
struct udevice *bus = dev->parent;
struct omap3_spi_priv *priv = dev_get_priv(bus);
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
priv->cs = slave_plat->cs;
priv->wordlen = wordlen;
_omap3_spi_set_wordlen(priv);
return 0;
}
static int omap3_spi_probe(struct udevice *dev)
{
struct omap3_spi_priv *priv = dev_get_priv(dev);
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
struct omap2_mcspi_platform_config* data =
(struct omap2_mcspi_platform_config*)dev_get_driver_data(dev);
priv->regs = (struct mcspi *)(devfdt_get_addr(dev) + data->regs_offset);
if (fdtdec_get_bool(blob, node, "ti,pindir-d0-out-d1-in"))
priv->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN;
else
priv->pin_dir = MCSPI_PINDIR_D0_IN_D1_OUT;
priv->wordlen = SPI_DEFAULT_WORDLEN;
spi_reset(priv->regs);
return 0;
}
static int omap3_spi_xfer(struct udevice *dev, unsigned int bitlen,
const void *dout, void *din, unsigned long flags)
{
struct udevice *bus = dev->parent;
struct omap3_spi_priv *priv = dev_get_priv(bus);
return _spi_xfer(priv, bitlen, dout, din, flags);
}
static int omap3_spi_set_speed(struct udevice *dev, unsigned int speed)
{
struct omap3_spi_priv *priv = dev_get_priv(dev);
priv->freq = speed;
_omap3_spi_set_speed(priv);
return 0;
}
static int omap3_spi_set_mode(struct udevice *dev, uint mode)
{
struct omap3_spi_priv *priv = dev_get_priv(dev);
priv->mode = mode;
_omap3_spi_set_mode(priv);
return 0;
}
static const struct dm_spi_ops omap3_spi_ops = {
.claim_bus = omap3_spi_claim_bus,
.release_bus = omap3_spi_release_bus,
.set_wordlen = omap3_spi_set_wordlen,
.xfer = omap3_spi_xfer,
.set_speed = omap3_spi_set_speed,
.set_mode = omap3_spi_set_mode,
/*
* cs_info is not needed, since we require all chip selects to be
* in the device tree explicitly
*/
};
static struct omap2_mcspi_platform_config omap2_pdata = {
.regs_offset = 0,
};
static struct omap2_mcspi_platform_config omap4_pdata = {
.regs_offset = OMAP4_MCSPI_REG_OFFSET,
};
static const struct udevice_id omap3_spi_ids[] = {
{ .compatible = "ti,omap2-mcspi", .data = (ulong)&omap2_pdata },
{ .compatible = "ti,omap4-mcspi", .data = (ulong)&omap4_pdata },
{ }
};
U_BOOT_DRIVER(omap3_spi) = {
.name = "omap3_spi",
.id = UCLASS_SPI,
.of_match = omap3_spi_ids,
.probe = omap3_spi_probe,
.ops = &omap3_spi_ops,
.priv_auto_alloc_size = sizeof(struct omap3_spi_priv),
};
#endif
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