static int omap2_mcspi_set_rxfifo(const struct spi_device *spi, int buf_size,
int enable, int bytes_per_wl )
{
u32 l, rw, s;
unsigned short revert = 0;
struct spi_master *master = spi->master;
struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
buf_size = buf_size/bytes_per_wl;
// l = mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCONF0);
l = mcspi_cached_chconf0(spi);
s = mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCTRL0);
if (enable == 1) {
/* FIFO cannot be enabled for both TX and RX
* simultaneously
*/
// if (l & OMAP2_MCSPI_CHCONF_FFET)
// return -EPERM;
/* Channel needs to be disabled and enabled
* for FIFO setting to take affect
*/
if (s & OMAP2_MCSPI_CHCTRL_EN) {
omap2_mcspi_set_enable(spi, 0);
revert = 1;
}
if (buf_size < mcspi->fifo_depth)
mcspi_write_reg(master, OMAP2_MCSPI_XFERLEVEL,
((buf_size << 16) |
(buf_size - 1) << 8));
else
mcspi_write_reg(master, OMAP2_MCSPI_XFERLEVEL,
((buf_size << 16) |
//(mcspi->fifo_depth - 1) << 8));
((mcspi->fifo_depth - 1) << 8) | ((mcspi->fifo_depth - 1) << 0) ));
}
rw = OMAP2_MCSPI_CHCONF_FFER;
MOD_REG_BIT(l, rw, enable);
// mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCONF0, l);
mcspi_write_chconf0(spi,l);
if (revert)
omap2_mcspi_set_enable(spi, 1);
return 0;
}
static int omap2_mcspi_set_rxfifo(const struct spi_device *spi, int buf_size,
int wl_bytes, int enable)
{
u32 l, rw, s, xfer_ael;
unsigned short revert = 0;
struct spi_master *master = spi->master;
struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
u32 wcnt = buf_size/wl_bytes;
l = mcspi_cached_chconf0(spi);
s = mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCTRL0);
/* Read settings for TX FIFO */
xfer_ael = mcspi_read_reg(master, OMAP2_MCSPI_XFERLEVEL) & 0xff;
if (enable == 1) {
/* Channel needs to be disabled and enabled
* for FIFO setting to take affect
*/
if (s & OMAP2_MCSPI_CHCTRL_EN) {
omap2_mcspi_set_enable(spi, 0);
revert = 1;
}
if (buf_size < mcspi->fifo_depth)
mcspi_write_reg(master, OMAP2_MCSPI_XFERLEVEL,
((wcnt << 16) |
(buf_size - 1) << 8) |
xfer_ael);
else
mcspi_write_reg(master, OMAP2_MCSPI_XFERLEVEL,
((wcnt << 16) |
(mcspi->fifo_depth - 1) << 8) |
xfer_ael);
} else {
/* Reset register value for disable case */
mcspi_write_reg(master, OMAP2_MCSPI_XFERLEVEL, xfer_ael);
}
rw = OMAP2_MCSPI_CHCONF_FFER;
MOD_REG_BIT(l, rw, enable);
mcspi_write_chconf0(spi, l);
if (revert)
omap2_mcspi_set_enable(spi, 1);
return 0;
}
static void omap2_mcspi_txrx_dma(struct spi_device *spi,
struct spi_transfer *xfer)
{
struct omap2_mcspi * mcspi;
struct omap2_mcspi_cs * cs = spi->controller_state;
struct omap2_mcspi_dma * mcspi_dma;
unsigned int count, c;
unsigned long base, tx_reg, rx_reg;
int word_len, data_type, element_count;
u8 * rx;
const u8 * tx;
u32 l;
mcspi = class_get_devdata(&spi->master->cdev);
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
count = xfer->len;
c = count;
word_len = cs->word_len;
l = mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCONF0);
l &= ~OMAP2_MCSPI_CHCONF_TRM_MASK;
if (xfer->tx_buf == NULL)
l |= OMAP2_MCSPI_CHCONF_TRM_RX_ONLY;
else if (xfer->rx_buf == NULL)
l |= OMAP2_MCSPI_CHCONF_TRM_TX_ONLY;
mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCONF0, l);
omap2_mcspi_set_enable(spi, 1);
base = io_v2p(mcspi->base) + spi->chip_select * 0x14;
tx_reg = base + OMAP2_MCSPI_TX0;
rx_reg = base + OMAP2_MCSPI_RX0;
rx = xfer->rx_buf;
tx = xfer->tx_buf;
if (word_len <= 8) {
data_type = OMAP_DMA_DATA_TYPE_S8;
element_count = count;
} else if (word_len <= 16) {
data_type = OMAP_DMA_DATA_TYPE_S16;
element_count = count >> 1;
} else if (word_len <= 32) {