mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-04 18:41:03 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
728 lines
17 KiB
C
728 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000-2003
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* Copyright (C) 2004-2009, 2015 Freescale Semiconductor, Inc.
|
|
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
|
|
* Chao Fu (B44548@freescale.com)
|
|
* Haikun Wang (B53464@freescale.com)
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <common.h>
|
|
#include <spi.h>
|
|
#include <malloc.h>
|
|
#include <asm/io.h>
|
|
#include <fdtdec.h>
|
|
#ifndef CONFIG_M68K
|
|
#include <asm/arch/clock.h>
|
|
#endif
|
|
#include <fsl_dspi.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* fsl_dspi_platdata flags */
|
|
#define DSPI_FLAG_REGMAP_ENDIAN_BIG BIT(0)
|
|
|
|
/* idle data value */
|
|
#define DSPI_IDLE_VAL 0x0
|
|
|
|
/* max chipselect signals number */
|
|
#define FSL_DSPI_MAX_CHIPSELECT 6
|
|
|
|
/* default SCK frequency, unit: HZ */
|
|
#define FSL_DSPI_DEFAULT_SCK_FREQ 10000000
|
|
|
|
/* tx/rx data wait timeout value, unit: us */
|
|
#define DSPI_TXRX_WAIT_TIMEOUT 1000000
|
|
|
|
/* CTAR register pre-configure value */
|
|
#define DSPI_CTAR_DEFAULT_VALUE (DSPI_CTAR_TRSZ(7) | \
|
|
DSPI_CTAR_PCSSCK_1CLK | \
|
|
DSPI_CTAR_PASC(0) | \
|
|
DSPI_CTAR_PDT(0) | \
|
|
DSPI_CTAR_CSSCK(0) | \
|
|
DSPI_CTAR_ASC(0) | \
|
|
DSPI_CTAR_DT(0))
|
|
|
|
/* CTAR register pre-configure mask */
|
|
#define DSPI_CTAR_SET_MODE_MASK (DSPI_CTAR_TRSZ(15) | \
|
|
DSPI_CTAR_PCSSCK(3) | \
|
|
DSPI_CTAR_PASC(3) | \
|
|
DSPI_CTAR_PDT(3) | \
|
|
DSPI_CTAR_CSSCK(15) | \
|
|
DSPI_CTAR_ASC(15) | \
|
|
DSPI_CTAR_DT(15))
|
|
|
|
/**
|
|
* struct fsl_dspi_platdata - platform data for Freescale DSPI
|
|
*
|
|
* @flags: Flags for DSPI DSPI_FLAG_...
|
|
* @speed_hz: Default SCK frequency
|
|
* @num_chipselect: Number of DSPI chipselect signals
|
|
* @regs_addr: Base address of DSPI registers
|
|
*/
|
|
struct fsl_dspi_platdata {
|
|
uint flags;
|
|
uint speed_hz;
|
|
uint num_chipselect;
|
|
fdt_addr_t regs_addr;
|
|
};
|
|
|
|
/**
|
|
* struct fsl_dspi_priv - private data for Freescale DSPI
|
|
*
|
|
* @flags: Flags for DSPI DSPI_FLAG_...
|
|
* @mode: SPI mode to use for slave device (see SPI mode flags)
|
|
* @mcr_val: MCR register configure value
|
|
* @bus_clk: DSPI input clk frequency
|
|
* @speed_hz: Default SCK frequency
|
|
* @charbit: How many bits in every transfer
|
|
* @num_chipselect: Number of DSPI chipselect signals
|
|
* @ctar_val: CTAR register configure value of per chipselect slave device
|
|
* @regs: Point to DSPI register structure for I/O access
|
|
*/
|
|
struct fsl_dspi_priv {
|
|
uint flags;
|
|
uint mode;
|
|
uint mcr_val;
|
|
uint bus_clk;
|
|
uint speed_hz;
|
|
uint charbit;
|
|
uint num_chipselect;
|
|
uint ctar_val[FSL_DSPI_MAX_CHIPSELECT];
|
|
struct dspi *regs;
|
|
};
|
|
|
|
#ifndef CONFIG_DM_SPI
|
|
struct fsl_dspi {
|
|
struct spi_slave slave;
|
|
struct fsl_dspi_priv priv;
|
|
};
|
|
#endif
|
|
|
|
__weak void cpu_dspi_port_conf(void)
|
|
{
|
|
}
|
|
|
|
__weak int cpu_dspi_claim_bus(uint bus, uint cs)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
__weak void cpu_dspi_release_bus(uint bus, uint cs)
|
|
{
|
|
}
|
|
|
|
static uint dspi_read32(uint flags, uint *addr)
|
|
{
|
|
return flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ?
|
|
in_be32(addr) : in_le32(addr);
|
|
}
|
|
|
|
static void dspi_write32(uint flags, uint *addr, uint val)
|
|
{
|
|
flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ?
|
|
out_be32(addr, val) : out_le32(addr, val);
|
|
}
|
|
|
|
static void dspi_halt(struct fsl_dspi_priv *priv, u8 halt)
|
|
{
|
|
uint mcr_val;
|
|
|
|
mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
|
|
|
|
if (halt)
|
|
mcr_val |= DSPI_MCR_HALT;
|
|
else
|
|
mcr_val &= ~DSPI_MCR_HALT;
|
|
|
|
dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
|
|
}
|
|
|
|
static void fsl_dspi_init_mcr(struct fsl_dspi_priv *priv, uint cfg_val)
|
|
{
|
|
/* halt DSPI module */
|
|
dspi_halt(priv, 1);
|
|
|
|
dspi_write32(priv->flags, &priv->regs->mcr, cfg_val);
|
|
|
|
/* resume module */
|
|
dspi_halt(priv, 0);
|
|
|
|
priv->mcr_val = cfg_val;
|
|
}
|
|
|
|
static void fsl_dspi_cfg_cs_active_state(struct fsl_dspi_priv *priv,
|
|
uint cs, uint state)
|
|
{
|
|
uint mcr_val;
|
|
|
|
dspi_halt(priv, 1);
|
|
|
|
mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
|
|
if (state & SPI_CS_HIGH)
|
|
/* CSx inactive state is low */
|
|
mcr_val &= ~DSPI_MCR_PCSIS(cs);
|
|
else
|
|
/* CSx inactive state is high */
|
|
mcr_val |= DSPI_MCR_PCSIS(cs);
|
|
dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
|
|
|
|
dspi_halt(priv, 0);
|
|
}
|
|
|
|
static int fsl_dspi_cfg_ctar_mode(struct fsl_dspi_priv *priv,
|
|
uint cs, uint mode)
|
|
{
|
|
uint bus_setup;
|
|
|
|
bus_setup = dspi_read32(priv->flags, &priv->regs->ctar[0]);
|
|
|
|
bus_setup &= ~DSPI_CTAR_SET_MODE_MASK;
|
|
bus_setup |= priv->ctar_val[cs];
|
|
bus_setup &= ~(DSPI_CTAR_CPOL | DSPI_CTAR_CPHA | DSPI_CTAR_LSBFE);
|
|
|
|
if (mode & SPI_CPOL)
|
|
bus_setup |= DSPI_CTAR_CPOL;
|
|
if (mode & SPI_CPHA)
|
|
bus_setup |= DSPI_CTAR_CPHA;
|
|
if (mode & SPI_LSB_FIRST)
|
|
bus_setup |= DSPI_CTAR_LSBFE;
|
|
|
|
dspi_write32(priv->flags, &priv->regs->ctar[0], bus_setup);
|
|
|
|
priv->charbit =
|
|
((dspi_read32(priv->flags, &priv->regs->ctar[0]) &
|
|
DSPI_CTAR_TRSZ(15)) == DSPI_CTAR_TRSZ(15)) ? 16 : 8;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fsl_dspi_clr_fifo(struct fsl_dspi_priv *priv)
|
|
{
|
|
uint mcr_val;
|
|
|
|
dspi_halt(priv, 1);
|
|
mcr_val = dspi_read32(priv->flags, &priv->regs->mcr);
|
|
/* flush RX and TX FIFO */
|
|
mcr_val |= (DSPI_MCR_CTXF | DSPI_MCR_CRXF);
|
|
dspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
|
|
dspi_halt(priv, 0);
|
|
}
|
|
|
|
static void dspi_tx(struct fsl_dspi_priv *priv, u32 ctrl, u16 data)
|
|
{
|
|
int timeout = DSPI_TXRX_WAIT_TIMEOUT;
|
|
|
|
/* wait for empty entries in TXFIFO or timeout */
|
|
while (DSPI_SR_TXCTR(dspi_read32(priv->flags, &priv->regs->sr)) >= 4 &&
|
|
timeout--)
|
|
udelay(1);
|
|
|
|
if (timeout >= 0)
|
|
dspi_write32(priv->flags, &priv->regs->tfr, (ctrl | data));
|
|
else
|
|
debug("dspi_tx: waiting timeout!\n");
|
|
}
|
|
|
|
static u16 dspi_rx(struct fsl_dspi_priv *priv)
|
|
{
|
|
int timeout = DSPI_TXRX_WAIT_TIMEOUT;
|
|
|
|
/* wait for valid entries in RXFIFO or timeout */
|
|
while (DSPI_SR_RXCTR(dspi_read32(priv->flags, &priv->regs->sr)) == 0 &&
|
|
timeout--)
|
|
udelay(1);
|
|
|
|
if (timeout >= 0)
|
|
return (u16)DSPI_RFR_RXDATA(
|
|
dspi_read32(priv->flags, &priv->regs->rfr));
|
|
else {
|
|
debug("dspi_rx: waiting timeout!\n");
|
|
return (u16)(~0);
|
|
}
|
|
}
|
|
|
|
static int dspi_xfer(struct fsl_dspi_priv *priv, uint cs, unsigned int bitlen,
|
|
const void *dout, void *din, unsigned long flags)
|
|
{
|
|
u16 *spi_rd16 = NULL, *spi_wr16 = NULL;
|
|
u8 *spi_rd = NULL, *spi_wr = NULL;
|
|
static u32 ctrl;
|
|
uint len = bitlen >> 3;
|
|
|
|
if (priv->charbit == 16) {
|
|
bitlen >>= 1;
|
|
spi_wr16 = (u16 *)dout;
|
|
spi_rd16 = (u16 *)din;
|
|
} else {
|
|
spi_wr = (u8 *)dout;
|
|
spi_rd = (u8 *)din;
|
|
}
|
|
|
|
if ((flags & SPI_XFER_BEGIN) == SPI_XFER_BEGIN)
|
|
ctrl |= DSPI_TFR_CONT;
|
|
|
|
ctrl = ctrl & DSPI_TFR_CONT;
|
|
ctrl = ctrl | DSPI_TFR_CTAS(0) | DSPI_TFR_PCS(cs);
|
|
|
|
if (len > 1) {
|
|
int tmp_len = len - 1;
|
|
while (tmp_len--) {
|
|
if (dout != NULL) {
|
|
if (priv->charbit == 16)
|
|
dspi_tx(priv, ctrl, *spi_wr16++);
|
|
else
|
|
dspi_tx(priv, ctrl, *spi_wr++);
|
|
dspi_rx(priv);
|
|
}
|
|
|
|
if (din != NULL) {
|
|
dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
|
|
if (priv->charbit == 16)
|
|
*spi_rd16++ = dspi_rx(priv);
|
|
else
|
|
*spi_rd++ = dspi_rx(priv);
|
|
}
|
|
}
|
|
|
|
len = 1; /* remaining byte */
|
|
}
|
|
|
|
if ((flags & SPI_XFER_END) == SPI_XFER_END)
|
|
ctrl &= ~DSPI_TFR_CONT;
|
|
|
|
if (len) {
|
|
if (dout != NULL) {
|
|
if (priv->charbit == 16)
|
|
dspi_tx(priv, ctrl, *spi_wr16);
|
|
else
|
|
dspi_tx(priv, ctrl, *spi_wr);
|
|
dspi_rx(priv);
|
|
}
|
|
|
|
if (din != NULL) {
|
|
dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
|
|
if (priv->charbit == 16)
|
|
*spi_rd16 = dspi_rx(priv);
|
|
else
|
|
*spi_rd = dspi_rx(priv);
|
|
}
|
|
} else {
|
|
/* dummy read */
|
|
dspi_tx(priv, ctrl, DSPI_IDLE_VAL);
|
|
dspi_rx(priv);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Calculate the divide value between input clk frequency and expected SCK frequency
|
|
* Formula: SCK = (clkrate/pbr) x ((1+dbr)/br)
|
|
* Dbr: use default value 0
|
|
*
|
|
* @pbr: return Baud Rate Prescaler value
|
|
* @br: return Baud Rate Scaler value
|
|
* @speed_hz: expected SCK frequency
|
|
* @clkrate: input clk frequency
|
|
*/
|
|
static int fsl_dspi_hz_to_spi_baud(int *pbr, int *br,
|
|
int speed_hz, uint clkrate)
|
|
{
|
|
/* Valid baud rate pre-scaler values */
|
|
int pbr_tbl[4] = {2, 3, 5, 7};
|
|
int brs[16] = {2, 4, 6, 8,
|
|
16, 32, 64, 128,
|
|
256, 512, 1024, 2048,
|
|
4096, 8192, 16384, 32768};
|
|
int temp, i = 0, j = 0;
|
|
|
|
temp = clkrate / speed_hz;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pbr_tbl); i++)
|
|
for (j = 0; j < ARRAY_SIZE(brs); j++) {
|
|
if (pbr_tbl[i] * brs[j] >= temp) {
|
|
*pbr = i;
|
|
*br = j;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
debug("Can not find valid baud rate,speed_hz is %d, ", speed_hz);
|
|
debug("clkrate is %d, we use the max prescaler value.\n", clkrate);
|
|
|
|
*pbr = ARRAY_SIZE(pbr_tbl) - 1;
|
|
*br = ARRAY_SIZE(brs) - 1;
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int fsl_dspi_cfg_speed(struct fsl_dspi_priv *priv, uint speed)
|
|
{
|
|
int ret;
|
|
uint bus_setup;
|
|
int best_i, best_j, bus_clk;
|
|
|
|
bus_clk = priv->bus_clk;
|
|
|
|
debug("DSPI set_speed: expected SCK speed %u, bus_clk %u.\n",
|
|
speed, bus_clk);
|
|
|
|
bus_setup = dspi_read32(priv->flags, &priv->regs->ctar[0]);
|
|
bus_setup &= ~(DSPI_CTAR_DBR | DSPI_CTAR_PBR(0x3) | DSPI_CTAR_BR(0xf));
|
|
|
|
ret = fsl_dspi_hz_to_spi_baud(&best_i, &best_j, speed, bus_clk);
|
|
if (ret) {
|
|
speed = priv->speed_hz;
|
|
debug("DSPI set_speed use default SCK rate %u.\n", speed);
|
|
fsl_dspi_hz_to_spi_baud(&best_i, &best_j, speed, bus_clk);
|
|
}
|
|
|
|
bus_setup |= (DSPI_CTAR_PBR(best_i) | DSPI_CTAR_BR(best_j));
|
|
dspi_write32(priv->flags, &priv->regs->ctar[0], bus_setup);
|
|
|
|
priv->speed_hz = speed;
|
|
|
|
return 0;
|
|
}
|
|
#ifndef CONFIG_DM_SPI
|
|
void spi_init(void)
|
|
{
|
|
/* Nothing to do */
|
|
}
|
|
|
|
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
|
|
{
|
|
if (((cs >= 0) && (cs < 8)) && ((bus >= 0) && (bus < 8)))
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int mode)
|
|
{
|
|
struct fsl_dspi *dspi;
|
|
uint mcr_cfg_val;
|
|
|
|
dspi = spi_alloc_slave(struct fsl_dspi, bus, cs);
|
|
if (!dspi)
|
|
return NULL;
|
|
|
|
cpu_dspi_port_conf();
|
|
|
|
#ifdef CONFIG_SYS_FSL_DSPI_BE
|
|
dspi->priv.flags |= DSPI_FLAG_REGMAP_ENDIAN_BIG;
|
|
#endif
|
|
|
|
dspi->priv.regs = (struct dspi *)MMAP_DSPI;
|
|
|
|
#ifdef CONFIG_M68K
|
|
dspi->priv.bus_clk = gd->bus_clk;
|
|
#else
|
|
dspi->priv.bus_clk = mxc_get_clock(MXC_DSPI_CLK);
|
|
#endif
|
|
dspi->priv.speed_hz = FSL_DSPI_DEFAULT_SCK_FREQ;
|
|
|
|
/* default: all CS signals inactive state is high */
|
|
mcr_cfg_val = DSPI_MCR_MSTR | DSPI_MCR_PCSIS_MASK |
|
|
DSPI_MCR_CRXF | DSPI_MCR_CTXF;
|
|
fsl_dspi_init_mcr(&dspi->priv, mcr_cfg_val);
|
|
|
|
for (i = 0; i < FSL_DSPI_MAX_CHIPSELECT; i++)
|
|
dspi->priv.ctar_val[i] = DSPI_CTAR_DEFAULT_VALUE;
|
|
|
|
#ifdef CONFIG_SYS_DSPI_CTAR0
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 0)
|
|
dspi->priv.ctar_val[0] = CONFIG_SYS_DSPI_CTAR0;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR1
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 1)
|
|
dspi->priv.ctar_val[1] = CONFIG_SYS_DSPI_CTAR1;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR2
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 2)
|
|
dspi->priv.ctar_val[2] = CONFIG_SYS_DSPI_CTAR2;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR3
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 3)
|
|
dspi->priv.ctar_val[3] = CONFIG_SYS_DSPI_CTAR3;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR4
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 4)
|
|
dspi->priv.ctar_val[4] = CONFIG_SYS_DSPI_CTAR4;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR5
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 5)
|
|
dspi->priv.ctar_val[5] = CONFIG_SYS_DSPI_CTAR5;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR6
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 6)
|
|
dspi->priv.ctar_val[6] = CONFIG_SYS_DSPI_CTAR6;
|
|
#endif
|
|
#ifdef CONFIG_SYS_DSPI_CTAR7
|
|
if (FSL_DSPI_MAX_CHIPSELECT > 7)
|
|
dspi->priv.ctar_val[7] = CONFIG_SYS_DSPI_CTAR7;
|
|
#endif
|
|
|
|
fsl_dspi_cfg_speed(&dspi->priv, max_hz);
|
|
|
|
/* configure transfer mode */
|
|
fsl_dspi_cfg_ctar_mode(&dspi->priv, cs, mode);
|
|
|
|
/* configure active state of CSX */
|
|
fsl_dspi_cfg_cs_active_state(&dspi->priv, cs, mode);
|
|
|
|
return &dspi->slave;
|
|
}
|
|
|
|
void spi_free_slave(struct spi_slave *slave)
|
|
{
|
|
free(slave);
|
|
}
|
|
|
|
int spi_claim_bus(struct spi_slave *slave)
|
|
{
|
|
uint sr_val;
|
|
struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
|
|
|
|
cpu_dspi_claim_bus(slave->bus, slave->cs);
|
|
|
|
fsl_dspi_clr_fifo(&dspi->priv);
|
|
|
|
/* check module TX and RX status */
|
|
sr_val = dspi_read32(dspi->priv.flags, &dspi->priv.regs->sr);
|
|
if ((sr_val & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) {
|
|
debug("DSPI RX/TX not ready!\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void spi_release_bus(struct spi_slave *slave)
|
|
{
|
|
struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
|
|
|
|
dspi_halt(&dspi->priv, 1);
|
|
cpu_dspi_release_bus(slave->bus.slave->cs);
|
|
}
|
|
|
|
int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
|
|
void *din, unsigned long flags)
|
|
{
|
|
struct fsl_dspi *dspi = (struct fsl_dspi *)slave;
|
|
return dspi_xfer(&dspi->priv, slave->cs, bitlen, dout, din, flags);
|
|
}
|
|
#else
|
|
static int fsl_dspi_child_pre_probe(struct udevice *dev)
|
|
{
|
|
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
|
|
struct fsl_dspi_priv *priv = dev_get_priv(dev->parent);
|
|
|
|
if (slave_plat->cs >= priv->num_chipselect) {
|
|
debug("DSPI invalid chipselect number %d(max %d)!\n",
|
|
slave_plat->cs, priv->num_chipselect - 1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
priv->ctar_val[slave_plat->cs] = DSPI_CTAR_DEFAULT_VALUE;
|
|
|
|
debug("DSPI pre_probe slave device on CS %u, max_hz %u, mode 0x%x.\n",
|
|
slave_plat->cs, slave_plat->max_hz, slave_plat->mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_dspi_probe(struct udevice *bus)
|
|
{
|
|
struct fsl_dspi_platdata *plat = dev_get_platdata(bus);
|
|
struct fsl_dspi_priv *priv = dev_get_priv(bus);
|
|
struct dm_spi_bus *dm_spi_bus;
|
|
uint mcr_cfg_val;
|
|
|
|
dm_spi_bus = bus->uclass_priv;
|
|
|
|
/* cpu speical pin muxing configure */
|
|
cpu_dspi_port_conf();
|
|
|
|
/* get input clk frequency */
|
|
priv->regs = (struct dspi *)plat->regs_addr;
|
|
priv->flags = plat->flags;
|
|
#ifdef CONFIG_M68K
|
|
priv->bus_clk = gd->bus_clk;
|
|
#else
|
|
priv->bus_clk = mxc_get_clock(MXC_DSPI_CLK);
|
|
#endif
|
|
priv->num_chipselect = plat->num_chipselect;
|
|
priv->speed_hz = plat->speed_hz;
|
|
/* frame data length in bits, default 8bits */
|
|
priv->charbit = 8;
|
|
|
|
dm_spi_bus->max_hz = plat->speed_hz;
|
|
|
|
/* default: all CS signals inactive state is high */
|
|
mcr_cfg_val = DSPI_MCR_MSTR | DSPI_MCR_PCSIS_MASK |
|
|
DSPI_MCR_CRXF | DSPI_MCR_CTXF;
|
|
fsl_dspi_init_mcr(priv, mcr_cfg_val);
|
|
|
|
debug("%s probe done, bus-num %d.\n", bus->name, bus->seq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_dspi_claim_bus(struct udevice *dev)
|
|
{
|
|
uint sr_val;
|
|
struct fsl_dspi_priv *priv;
|
|
struct udevice *bus = dev->parent;
|
|
struct dm_spi_slave_platdata *slave_plat =
|
|
dev_get_parent_platdata(dev);
|
|
|
|
priv = dev_get_priv(bus);
|
|
|
|
/* processor special preparation work */
|
|
cpu_dspi_claim_bus(bus->seq, slave_plat->cs);
|
|
|
|
/* configure transfer mode */
|
|
fsl_dspi_cfg_ctar_mode(priv, slave_plat->cs, priv->mode);
|
|
|
|
/* configure active state of CSX */
|
|
fsl_dspi_cfg_cs_active_state(priv, slave_plat->cs,
|
|
priv->mode);
|
|
|
|
fsl_dspi_clr_fifo(priv);
|
|
|
|
/* check module TX and RX status */
|
|
sr_val = dspi_read32(priv->flags, &priv->regs->sr);
|
|
if ((sr_val & DSPI_SR_TXRXS) != DSPI_SR_TXRXS) {
|
|
debug("DSPI RX/TX not ready!\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_dspi_release_bus(struct udevice *dev)
|
|
{
|
|
struct udevice *bus = dev->parent;
|
|
struct fsl_dspi_priv *priv = dev_get_priv(bus);
|
|
struct dm_spi_slave_platdata *slave_plat =
|
|
dev_get_parent_platdata(dev);
|
|
|
|
/* halt module */
|
|
dspi_halt(priv, 1);
|
|
|
|
/* processor special release work */
|
|
cpu_dspi_release_bus(bus->seq, slave_plat->cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* This function doesn't do anything except help with debugging
|
|
*/
|
|
static int fsl_dspi_bind(struct udevice *bus)
|
|
{
|
|
debug("%s assigned req_seq %d.\n", bus->name, bus->req_seq);
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_dspi_ofdata_to_platdata(struct udevice *bus)
|
|
{
|
|
fdt_addr_t addr;
|
|
struct fsl_dspi_platdata *plat = bus->platdata;
|
|
const void *blob = gd->fdt_blob;
|
|
int node = dev_of_offset(bus);
|
|
|
|
if (fdtdec_get_bool(blob, node, "big-endian"))
|
|
plat->flags |= DSPI_FLAG_REGMAP_ENDIAN_BIG;
|
|
|
|
plat->num_chipselect =
|
|
fdtdec_get_int(blob, node, "num-cs", FSL_DSPI_MAX_CHIPSELECT);
|
|
|
|
addr = devfdt_get_addr(bus);
|
|
if (addr == FDT_ADDR_T_NONE) {
|
|
debug("DSPI: Can't get base address or size\n");
|
|
return -ENOMEM;
|
|
}
|
|
plat->regs_addr = addr;
|
|
|
|
plat->speed_hz = fdtdec_get_int(blob,
|
|
node, "spi-max-frequency", FSL_DSPI_DEFAULT_SCK_FREQ);
|
|
|
|
debug("DSPI: regs=%pa, max-frequency=%d, endianess=%s, num-cs=%d\n",
|
|
&plat->regs_addr, plat->speed_hz,
|
|
plat->flags & DSPI_FLAG_REGMAP_ENDIAN_BIG ? "be" : "le",
|
|
plat->num_chipselect);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_dspi_xfer(struct udevice *dev, unsigned int bitlen,
|
|
const void *dout, void *din, unsigned long flags)
|
|
{
|
|
struct fsl_dspi_priv *priv;
|
|
struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
|
|
struct udevice *bus;
|
|
|
|
bus = dev->parent;
|
|
priv = dev_get_priv(bus);
|
|
|
|
return dspi_xfer(priv, slave_plat->cs, bitlen, dout, din, flags);
|
|
}
|
|
|
|
static int fsl_dspi_set_speed(struct udevice *bus, uint speed)
|
|
{
|
|
struct fsl_dspi_priv *priv = dev_get_priv(bus);
|
|
|
|
return fsl_dspi_cfg_speed(priv, speed);
|
|
}
|
|
|
|
static int fsl_dspi_set_mode(struct udevice *bus, uint mode)
|
|
{
|
|
struct fsl_dspi_priv *priv = dev_get_priv(bus);
|
|
|
|
debug("DSPI set_mode: mode 0x%x.\n", mode);
|
|
|
|
/*
|
|
* We store some chipselect special configure value in priv->ctar_val,
|
|
* and we can't get the correct chipselect number here,
|
|
* so just store mode value.
|
|
* Do really configuration when claim_bus.
|
|
*/
|
|
priv->mode = mode;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_spi_ops fsl_dspi_ops = {
|
|
.claim_bus = fsl_dspi_claim_bus,
|
|
.release_bus = fsl_dspi_release_bus,
|
|
.xfer = fsl_dspi_xfer,
|
|
.set_speed = fsl_dspi_set_speed,
|
|
.set_mode = fsl_dspi_set_mode,
|
|
};
|
|
|
|
static const struct udevice_id fsl_dspi_ids[] = {
|
|
{ .compatible = "fsl,vf610-dspi" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(fsl_dspi) = {
|
|
.name = "fsl_dspi",
|
|
.id = UCLASS_SPI,
|
|
.of_match = fsl_dspi_ids,
|
|
.ops = &fsl_dspi_ops,
|
|
.ofdata_to_platdata = fsl_dspi_ofdata_to_platdata,
|
|
.platdata_auto_alloc_size = sizeof(struct fsl_dspi_platdata),
|
|
.priv_auto_alloc_size = sizeof(struct fsl_dspi_priv),
|
|
.probe = fsl_dspi_probe,
|
|
.child_pre_probe = fsl_dspi_child_pre_probe,
|
|
.bind = fsl_dspi_bind,
|
|
};
|
|
#endif
|