*
* Modified by Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include "omap3_spi.h"
-#define WORD_LEN 8
-#define SPI_WAIT_TIMEOUT 3000000;
+#define SPI_WAIT_TIMEOUT 3000000
static void spi_reset(struct omap3_spi_slave *ds)
{
static void omap3_spi_set_enable(struct omap3_spi_slave *ds, int enable)
{
writel(enable, &ds->regs->channel[ds->slave.cs].chctrl);
- /* Flash post writes to make immediate effect */
+ /* Flash post writes to make immediate effect */
readl(&ds->regs->channel[ds->slave.cs].chctrl);
}
regs = (struct mcspi *)OMAP3_MCSPI2_BASE;
break;
#endif
-#ifdef OMAP3_MCSPI3_BASE
+#ifdef OMAP3_MCSPI3_BASE
case 2:
regs = (struct mcspi *)OMAP3_MCSPI3_BASE;
break;
/* wordlength */
conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK;
- conf |= (WORD_LEN - 1) << 7;
+ conf |= (ds->slave.wordlen - 1) << 7;
/* set chipselect polarity; manage with FORCE */
if (!(ds->mode & SPI_CS_HIGH))
spi_reset(ds);
}
-int omap3_spi_write(struct spi_slave *slave, unsigned int len, const u8 *txp,
+int omap3_spi_write(struct spi_slave *slave, unsigned int len, const void *txp,
unsigned long flags)
{
struct omap3_spi_slave *ds = to_omap3_spi(slave);
/* Enable the channel */
omap3_spi_set_enable(ds,OMAP3_MCSPI_CHCTRL_EN);
- chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
+ chconf &= ~(OMAP3_MCSPI_CHCONF_TRM_MASK | OMAP3_MCSPI_CHCONF_WL_MASK);
+ chconf |= (ds->slave.wordlen - 1) << 7;
chconf |= OMAP3_MCSPI_CHCONF_TRM_TX_ONLY;
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(ds,chconf);
}
}
/* Write the data */
- writel(txp[i], &ds->regs->channel[ds->slave.cs].tx);
+ unsigned int *tx = &ds->regs->channel[ds->slave.cs].tx;
+ if (ds->slave.wordlen > 16)
+ writel(((u32 *)txp)[i], tx);
+ else if (ds->slave.wordlen > 8)
+ writel(((u16 *)txp)[i], tx);
+ else
+ writel(((u8 *)txp)[i], tx);
}
- /* wait to finish of transfer */
- while (!(readl(&ds->regs->channel[ds->slave.cs].chstat) &
- OMAP3_MCSPI_CHSTAT_EOT));
+ /* wait to finish of transfer */
+ while ((readl(&ds->regs->channel[ds->slave.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(ds,OMAP3_MCSPI_CHCTRL_DIS);
return 0;
}
-int omap3_spi_read(struct spi_slave *slave, unsigned int len, u8 *rxp,
+int omap3_spi_read(struct spi_slave *slave, unsigned int len, void *rxp,
unsigned long flags)
{
struct omap3_spi_slave *ds = to_omap3_spi(slave);
/* Enable the channel */
omap3_spi_set_enable(ds,OMAP3_MCSPI_CHCTRL_EN);
- chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
+ chconf &= ~(OMAP3_MCSPI_CHCONF_TRM_MASK | OMAP3_MCSPI_CHCONF_WL_MASK);
+ chconf |= (ds->slave.wordlen - 1) << 7;
chconf |= OMAP3_MCSPI_CHCONF_TRM_RX_ONLY;
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(ds,chconf);
omap3_spi_set_enable(ds,OMAP3_MCSPI_CHCTRL_DIS);
/* Read the data */
- rxp[i] = readl(&ds->regs->channel[ds->slave.cs].rx);
+ unsigned int *rx = &ds->regs->channel[ds->slave.cs].rx;
+ if (ds->slave.wordlen > 16)
+ ((u32 *)rxp)[i] = readl(rx);
+ else if (ds->slave.wordlen > 8)
+ ((u16 *)rxp)[i] = (u16)readl(rx);
+ else
+ ((u8 *)rxp)[i] = (u8)readl(rx);
}
if (flags & SPI_XFER_END) {
}
/*McSPI Transmit Receive Mode*/
-int omap3_spi_txrx(struct spi_slave *slave,
- unsigned int len, const u8 *txp, u8 *rxp, unsigned long flags)
+int omap3_spi_txrx(struct spi_slave *slave, unsigned int len,
+ const void *txp, void *rxp, unsigned long flags)
{
struct omap3_spi_slave *ds = to_omap3_spi(slave);
int timeout = SPI_WAIT_TIMEOUT;
omap3_spi_set_enable(ds,OMAP3_MCSPI_CHCTRL_EN);
/*set TRANSMIT-RECEIVE Mode*/
- chconf &= ~OMAP3_MCSPI_CHCONF_TRM_MASK;
+ chconf &= ~(OMAP3_MCSPI_CHCONF_TRM_MASK | OMAP3_MCSPI_CHCONF_WL_MASK);
+ chconf |= (ds->slave.wordlen - 1) << 7;
chconf |= OMAP3_MCSPI_CHCONF_FORCE;
omap3_spi_write_chconf(ds,chconf);
}
}
/* Write the data */
- writel(txp[i], &ds->regs->channel[ds->slave.cs].tx);
+ unsigned int *tx = &ds->regs->channel[ds->slave.cs].tx;
+ if (ds->slave.wordlen > 16)
+ writel(((u32 *)txp)[i], tx);
+ else if (ds->slave.wordlen > 8)
+ writel(((u16 *)txp)[i], tx);
+ else
+ writel(((u8 *)txp)[i], tx);
/*Read: wait for RX containing data (RXS == 1)*/
while (!(readl(&ds->regs->channel[ds->slave.cs].chstat) &
}
}
/* Read the data */
- rxp[i] = readl(&ds->regs->channel[ds->slave.cs].rx);
+ unsigned int *rx = &ds->regs->channel[ds->slave.cs].rx;
+ if (ds->slave.wordlen > 16)
+ ((u32 *)rxp)[i] = readl(rx);
+ else if (ds->slave.wordlen > 8)
+ ((u16 *)rxp)[i] = (u16)readl(rx);
+ else
+ ((u8 *)rxp)[i] = (u8)readl(rx);
}
/* Disable the channel */
- omap3_spi_set_enable(ds,OMAP3_MCSPI_CHCTRL_DIS);
+ omap3_spi_set_enable(ds,OMAP3_MCSPI_CHCTRL_DIS);
/*if transfer must be terminated disable the channel*/
if (flags & SPI_XFER_END) {
{
struct omap3_spi_slave *ds = to_omap3_spi(slave);
unsigned int len;
- const u8 *txp = dout;
- u8 *rxp = din;
int ret = -1;
- if (bitlen % 8)
+ if (ds->slave.wordlen < 4 || ds->slave.wordlen > 32) {
+ printf("omap3_spi: invalid wordlen %d\n", ds->slave.wordlen);
+ return -1;
+ }
+
+ if (bitlen % ds->slave.wordlen)
return -1;
- len = bitlen / 8;
+ len = bitlen / ds->slave.wordlen;
if (bitlen == 0) { /* only change CS */
int chconf = readl(&ds->regs->channel[ds->slave.cs].chconf);
ret = 0;
} else {
if (dout != NULL && din != NULL)
- ret = omap3_spi_txrx(slave, len, txp, rxp, flags);
+ ret = omap3_spi_txrx(slave, len, dout, din, flags);
else if (dout != NULL)
- ret = omap3_spi_write(slave, len, txp, flags);
+ ret = omap3_spi_write(slave, len, dout, flags);
else if (din != NULL)
- ret = omap3_spi_read(slave, len, rxp, flags);
+ ret = omap3_spi_read(slave, len, din, flags);
}
return ret;
}
projects / karo-tx-uboot.git / blobdiff