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authorHeiner Kallweit <hkallweit1@gmail.com>2016-11-26 02:00:28 +0300
committerMark Brown <broonie@kernel.org>2016-11-30 21:05:21 +0300
commitd54ef0574ade2eab4d203687d53ed20351e323ab (patch)
tree2f62fbc3f19a3eef2d6c08b340e0f87295802b1d
parentdcb425f3ba6ebee4269f68461420246ba9d4ec02 (diff)
downloadlinux-d54ef0574ade2eab4d203687d53ed20351e323ab.tar.xz
spi: fsl-espi: remove unused linearization code
After introducing direct transfers between hardware and transfer buffers remove all code which is unused now. This includes getting rid of the 64k linearization buffer. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--drivers/spi/spi-fsl-espi.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index e93892dca90a..cd2832940092 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -95,9 +95,6 @@ struct fsl_espi {
struct device *dev;
void __iomem *reg_base;
- const void *tx;
- void *rx;
-
struct list_head *m_transfers;
struct spi_transfer *tx_t;
unsigned int tx_pos;
@@ -107,11 +104,8 @@ struct fsl_espi {
bool rx_done;
bool swab;
- unsigned int rx_len;
- unsigned int tx_len;
unsigned int rxskip;
- u8 *local_buf;
spinlock_t lock;
u32 spibrg; /* SPIBRG input clock */
@@ -156,61 +150,6 @@ static inline void fsl_espi_write_reg8(struct fsl_espi *espi, int offset,
iowrite8(val, espi->reg_base + offset);
}
-static void fsl_espi_memcpy_swab(void *to, const void *from,
- struct spi_message *m,
- struct spi_transfer *t)
-{
- struct fsl_espi *espi = spi_master_get_devdata(m->spi->master);
- unsigned int len = t->len;
-
- if (!espi->swab) {
- memcpy(to, from, len);
- return;
- }
-
- while (len)
- if (len >= 4) {
- *(u32 *)to = swahb32p(from);
- to += 4;
- from += 4;
- len -= 4;
- } else {
- *(u16 *)to = swab16p(from);
- to += 2;
- from += 2;
- len -= 2;
- }
-}
-
-static void fsl_espi_copy_to_buf(struct spi_message *m,
- struct fsl_espi *espi)
-{
- struct spi_transfer *t;
- u8 *buf = espi->local_buf;
-
- list_for_each_entry(t, &m->transfers, transfer_list) {
- if (t->tx_buf)
- fsl_espi_memcpy_swab(buf, t->tx_buf, m, t);
- /* In RXSKIP mode controller shifts out zeros internally */
- else if (!espi->rxskip)
- memset(buf, 0, t->len);
- buf += t->len;
- }
-}
-
-static void fsl_espi_copy_from_buf(struct spi_message *m,
- struct fsl_espi *espi)
-{
- struct spi_transfer *t;
- u8 *buf = espi->local_buf;
-
- list_for_each_entry(t, &m->transfers, transfer_list) {
- if (t->rx_buf)
- fsl_espi_memcpy_swab(t->rx_buf, buf, m, t);
- buf += t->len;
- }
-}
-
static int fsl_espi_check_message(struct spi_message *m)
{
struct fsl_espi *espi = spi_master_get_devdata(m->spi->master);
@@ -421,12 +360,6 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
u32 mask, spcom;
int ret;
- espi->rx_len = t->len;
- espi->tx_len = t->len;
-
- espi->tx = t->tx_buf;
- espi->rx = t->rx_buf;
-
reinit_completion(&espi->done);
/* Set SPCOM[CS] and SPCOM[TRANLEN] field */
@@ -436,10 +369,7 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
/* configure RXSKIP mode */
if (espi->rxskip) {
spcom |= SPCOM_RXSKIP(espi->rxskip);
- espi->tx_len = espi->rxskip;
- espi->rx_len = t->len - espi->rxskip;
rx_len = t->len - espi->rxskip;
- espi->rx = t->rx_buf + espi->rxskip;
if (t->rx_nbits == SPI_NBITS_DUAL)
spcom |= SPCOM_DO;
}
@@ -497,7 +427,6 @@ static int fsl_espi_trans(struct spi_message *m, struct spi_transfer *trans)
if (espi->rxskip)
espi->rx_t = list_next_entry(espi->rx_t, transfer_list);
- fsl_espi_copy_to_buf(m, espi);
fsl_espi_setup_transfer(spi, trans);
ret = fsl_espi_bufs(spi, trans);
@@ -511,7 +440,6 @@ static int fsl_espi_trans(struct spi_message *m, struct spi_transfer *trans)
static int fsl_espi_do_one_msg(struct spi_master *master,
struct spi_message *m)
{
- struct fsl_espi *espi = spi_master_get_devdata(m->spi->master);
unsigned int delay_usecs = 0, rx_nbits = 0;
struct spi_transfer *t, trans = {};
int ret;
@@ -534,8 +462,6 @@ static int fsl_espi_do_one_msg(struct spi_master *master,
trans.speed_hz = t->speed_hz;
trans.bits_per_word = t->bits_per_word;
trans.delay_usecs = delay_usecs;
- trans.tx_buf = espi->local_buf;
- trans.rx_buf = espi->local_buf;
trans.rx_nbits = rx_nbits;
if (trans.len)
@@ -773,12 +699,6 @@ static int fsl_espi_probe(struct device *dev, struct resource *mem,
init_completion(&espi->done);
- espi->local_buf = devm_kmalloc(dev, SPCOM_TRANLEN_MAX, GFP_KERNEL);
- if (!espi->local_buf) {
- ret = -ENOMEM;
- goto err_probe;
- }
-
espi->reg_base = devm_ioremap_resource(dev, mem);
if (IS_ERR(espi->reg_base)) {
ret = PTR_ERR(espi->reg_base);