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path: root/drivers/tty/serial/atmel_serial.c
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Diffstat (limited to 'drivers/tty/serial/atmel_serial.c')
-rw-r--r--drivers/tty/serial/atmel_serial.c57
1 files changed, 29 insertions, 28 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 85667f709515..5bb5e4303754 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -857,7 +857,7 @@ static void atmel_complete_tx_dma(void *arg)
{
struct atmel_uart_port *atmel_port = arg;
struct uart_port *port = &atmel_port->uart;
- struct circ_buf *xmit = &port->state->xmit;
+ struct tty_port *tport = &port->state->port;
struct dma_chan *chan = atmel_port->chan_tx;
unsigned long flags;
@@ -873,15 +873,15 @@ static void atmel_complete_tx_dma(void *arg)
atmel_port->desc_tx = NULL;
spin_unlock(&atmel_port->lock_tx);
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
uart_write_wakeup(port);
/*
- * xmit is a circular buffer so, if we have just send data from
- * xmit->tail to the end of xmit->buf, now we have to transmit the
- * remaining data from the beginning of xmit->buf to xmit->head.
+ * xmit is a circular buffer so, if we have just send data from the
+ * tail to the end, now we have to transmit the remaining data from the
+ * beginning to the head.
*/
- if (!uart_circ_empty(xmit))
+ if (!kfifo_is_empty(&tport->xmit_fifo))
atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx);
else if (atmel_uart_is_half_duplex(port)) {
/*
@@ -919,18 +919,18 @@ static void atmel_release_tx_dma(struct uart_port *port)
static void atmel_tx_dma(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- struct circ_buf *xmit = &port->state->xmit;
+ struct tty_port *tport = &port->state->port;
struct dma_chan *chan = atmel_port->chan_tx;
struct dma_async_tx_descriptor *desc;
struct scatterlist sgl[2], *sg, *sg_tx = &atmel_port->sg_tx;
- unsigned int tx_len, part1_len, part2_len, sg_len;
+ unsigned int tx_len, tail, part1_len, part2_len, sg_len;
dma_addr_t phys_addr;
/* Make sure we have an idle channel */
if (atmel_port->desc_tx != NULL)
return;
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
+ if (!kfifo_is_empty(&tport->xmit_fifo) && !uart_tx_stopped(port)) {
/*
* DMA is idle now.
* Port xmit buffer is already mapped,
@@ -940,9 +940,8 @@ static void atmel_tx_dma(struct uart_port *port)
* Take the port lock to get a
* consistent xmit buffer state.
*/
- tx_len = CIRC_CNT_TO_END(xmit->head,
- xmit->tail,
- UART_XMIT_SIZE);
+ tx_len = kfifo_out_linear(&tport->xmit_fifo, &tail,
+ UART_XMIT_SIZE);
if (atmel_port->fifo_size) {
/* multi data mode */
@@ -956,7 +955,7 @@ static void atmel_tx_dma(struct uart_port *port)
sg_init_table(sgl, 2);
sg_len = 0;
- phys_addr = sg_dma_address(sg_tx) + xmit->tail;
+ phys_addr = sg_dma_address(sg_tx) + tail;
if (part1_len) {
sg = &sgl[sg_len++];
sg_dma_address(sg) = phys_addr;
@@ -973,7 +972,7 @@ static void atmel_tx_dma(struct uart_port *port)
/*
* save tx_len so atmel_complete_tx_dma() will increase
- * xmit->tail correctly
+ * tail correctly
*/
atmel_port->tx_len = tx_len;
@@ -1003,13 +1002,14 @@ static void atmel_tx_dma(struct uart_port *port)
dma_async_issue_pending(chan);
}
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
uart_write_wakeup(port);
}
static int atmel_prepare_tx_dma(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct tty_port *tport = &port->state->port;
struct device *mfd_dev = port->dev->parent;
dma_cap_mask_t mask;
struct dma_slave_config config;
@@ -1031,11 +1031,11 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
spin_lock_init(&atmel_port->lock_tx);
sg_init_table(&atmel_port->sg_tx, 1);
/* UART circular tx buffer is an aligned page. */
- BUG_ON(!PAGE_ALIGNED(port->state->xmit.buf));
+ BUG_ON(!PAGE_ALIGNED(tport->xmit_buf));
sg_set_page(&atmel_port->sg_tx,
- virt_to_page(port->state->xmit.buf),
+ virt_to_page(tport->xmit_buf),
UART_XMIT_SIZE,
- offset_in_page(port->state->xmit.buf));
+ offset_in_page(tport->xmit_buf));
nent = dma_map_sg(port->dev,
&atmel_port->sg_tx,
1,
@@ -1047,7 +1047,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
} else {
dev_dbg(port->dev, "%s: mapped %d@%p to %pad\n", __func__,
sg_dma_len(&atmel_port->sg_tx),
- port->state->xmit.buf,
+ tport->xmit_buf,
&sg_dma_address(&atmel_port->sg_tx));
}
@@ -1459,9 +1459,8 @@ static void atmel_release_tx_pdc(struct uart_port *port)
static void atmel_tx_pdc(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- struct circ_buf *xmit = &port->state->xmit;
+ struct tty_port *tport = &port->state->port;
struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
- int count;
/* nothing left to transmit? */
if (atmel_uart_readl(port, ATMEL_PDC_TCR))
@@ -1474,17 +1473,19 @@ static void atmel_tx_pdc(struct uart_port *port)
/* disable PDC transmit */
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS);
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
+ if (!kfifo_is_empty(&tport->xmit_fifo) && !uart_tx_stopped(port)) {
+ unsigned int count, tail;
+
dma_sync_single_for_device(port->dev,
pdc->dma_addr,
pdc->dma_size,
DMA_TO_DEVICE);
- count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
+ count = kfifo_out_linear(&tport->xmit_fifo, &tail,
+ UART_XMIT_SIZE);
pdc->ofs = count;
- atmel_uart_writel(port, ATMEL_PDC_TPR,
- pdc->dma_addr + xmit->tail);
+ atmel_uart_writel(port, ATMEL_PDC_TPR, pdc->dma_addr + tail);
atmel_uart_writel(port, ATMEL_PDC_TCR, count);
/* re-enable PDC transmit */
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
@@ -1498,7 +1499,7 @@ static void atmel_tx_pdc(struct uart_port *port)
}
}
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
uart_write_wakeup(port);
}
@@ -1506,9 +1507,9 @@ static int atmel_prepare_tx_pdc(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx;
- struct circ_buf *xmit = &port->state->xmit;
+ struct tty_port *tport = &port->state->port;
- pdc->buf = xmit->buf;
+ pdc->buf = tport->xmit_buf;
pdc->dma_addr = dma_map_single(port->dev,
pdc->buf,
UART_XMIT_SIZE,
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 01:30:04 +0000