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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.c164
1 files changed, 37 insertions, 127 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index c355ac9abafc..7551cab438ff 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1,5 +1,5 @@
/*
- * Driver for Atmel AT91 / AT32 Serial ports
+ * Driver for Atmel AT91 Serial ports
* Copyright (C) 2003 Rick Bronson
*
* Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd.
@@ -46,6 +46,7 @@
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/suspend.h>
+#include <linux/mm.h>
#include <asm/io.h>
#include <asm/ioctls.h>
@@ -118,7 +119,6 @@ struct atmel_uart_char {
/*
* at91: 6 USARTs and one DBGU port (SAM9260)
- * avr32: 4
* samx7: 3 USARTs and 5 UARTs
*/
#define ATMEL_MAX_UART 8
@@ -228,21 +228,6 @@ static inline void atmel_uart_writel(struct uart_port *port, u32 reg, u32 value)
__raw_writel(value, port->membase + reg);
}
-#ifdef CONFIG_AVR32
-
-/* AVR32 cannot handle 8 or 16bit I/O accesses but only 32bit I/O accesses */
-static inline u8 atmel_uart_read_char(struct uart_port *port)
-{
- return __raw_readl(port->membase + ATMEL_US_RHR);
-}
-
-static inline void atmel_uart_write_char(struct uart_port *port, u8 value)
-{
- __raw_writel(value, port->membase + ATMEL_US_THR);
-}
-
-#else
-
static inline u8 atmel_uart_read_char(struct uart_port *port)
{
return __raw_readb(port->membase + ATMEL_US_RHR);
@@ -253,8 +238,6 @@ static inline void atmel_uart_write_char(struct uart_port *port, u8 value)
__raw_writeb(value, port->membase + ATMEL_US_THR);
}
-#endif
-
#ifdef CONFIG_SERIAL_ATMEL_PDC
static bool atmel_use_pdc_rx(struct uart_port *port)
{
@@ -959,7 +942,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
sg_set_page(&atmel_port->sg_tx,
virt_to_page(port->state->xmit.buf),
UART_XMIT_SIZE,
- (unsigned long)port->state->xmit.buf & ~PAGE_MASK);
+ offset_in_page(port->state->xmit.buf));
nent = dma_map_sg(port->dev,
&atmel_port->sg_tx,
1,
@@ -1141,7 +1124,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
sg_set_page(&atmel_port->sg_rx,
virt_to_page(ring->buf),
sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE,
- (unsigned long)ring->buf & ~PAGE_MASK);
+ offset_in_page(ring->buf));
nent = dma_map_sg(port->dev,
&atmel_port->sg_rx,
1,
@@ -1655,72 +1638,56 @@ static void atmel_init_property(struct atmel_uart_port *atmel_port,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
-
- if (np) {
- /* DMA/PDC usage specification */
- if (of_property_read_bool(np, "atmel,use-dma-rx")) {
- if (of_property_read_bool(np, "dmas")) {
- atmel_port->use_dma_rx = true;
- atmel_port->use_pdc_rx = false;
- } else {
- atmel_port->use_dma_rx = false;
- atmel_port->use_pdc_rx = true;
- }
+
+ /* DMA/PDC usage specification */
+ if (of_property_read_bool(np, "atmel,use-dma-rx")) {
+ if (of_property_read_bool(np, "dmas")) {
+ atmel_port->use_dma_rx = true;
+ atmel_port->use_pdc_rx = false;
} else {
atmel_port->use_dma_rx = false;
- atmel_port->use_pdc_rx = false;
+ atmel_port->use_pdc_rx = true;
}
+ } else {
+ atmel_port->use_dma_rx = false;
+ atmel_port->use_pdc_rx = false;
+ }
- if (of_property_read_bool(np, "atmel,use-dma-tx")) {
- if (of_property_read_bool(np, "dmas")) {
- atmel_port->use_dma_tx = true;
- atmel_port->use_pdc_tx = false;
- } else {
- atmel_port->use_dma_tx = false;
- atmel_port->use_pdc_tx = true;
- }
+ if (of_property_read_bool(np, "atmel,use-dma-tx")) {
+ if (of_property_read_bool(np, "dmas")) {
+ atmel_port->use_dma_tx = true;
+ atmel_port->use_pdc_tx = false;
} else {
atmel_port->use_dma_tx = false;
- atmel_port->use_pdc_tx = false;
+ atmel_port->use_pdc_tx = true;
}
-
} else {
- atmel_port->use_pdc_rx = pdata->use_dma_rx;
- atmel_port->use_pdc_tx = pdata->use_dma_tx;
- atmel_port->use_dma_rx = false;
atmel_port->use_dma_tx = false;
+ atmel_port->use_pdc_tx = false;
}
-
}
static void atmel_init_rs485(struct uart_port *port,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
-
- if (np) {
- struct serial_rs485 *rs485conf = &port->rs485;
- u32 rs485_delay[2];
- /* rs485 properties */
- if (of_property_read_u32_array(np, "rs485-rts-delay",
- rs485_delay, 2) == 0) {
- rs485conf->delay_rts_before_send = rs485_delay[0];
- rs485conf->delay_rts_after_send = rs485_delay[1];
- rs485conf->flags = 0;
- }
- if (of_get_property(np, "rs485-rx-during-tx", NULL))
- rs485conf->flags |= SER_RS485_RX_DURING_TX;
+ struct serial_rs485 *rs485conf = &port->rs485;
+ u32 rs485_delay[2];
- if (of_get_property(np, "linux,rs485-enabled-at-boot-time",
- NULL))
- rs485conf->flags |= SER_RS485_ENABLED;
- } else {
- port->rs485 = pdata->rs485;
+ /* rs485 properties */
+ if (of_property_read_u32_array(np, "rs485-rts-delay",
+ rs485_delay, 2) == 0) {
+ rs485conf->delay_rts_before_send = rs485_delay[0];
+ rs485conf->delay_rts_after_send = rs485_delay[1];
+ rs485conf->flags = 0;
}
+ if (of_get_property(np, "rs485-rx-during-tx", NULL))
+ rs485conf->flags |= SER_RS485_RX_DURING_TX;
+
+ if (of_get_property(np, "linux,rs485-enabled-at-boot-time", NULL))
+ rs485conf->flags |= SER_RS485_ENABLED;
}
static void atmel_set_ops(struct uart_port *port)
@@ -2402,7 +2369,6 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
{
int ret;
struct uart_port *port = &atmel_port->uart;
- struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
atmel_init_property(atmel_port, pdev);
atmel_set_ops(port);
@@ -2410,24 +2376,17 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
atmel_init_rs485(port, pdev);
port->iotype = UPIO_MEM;
- port->flags = UPF_BOOT_AUTOCONF;
+ port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
port->ops = &atmel_pops;
port->fifosize = 1;
port->dev = &pdev->dev;
port->mapbase = pdev->resource[0].start;
port->irq = pdev->resource[1].start;
port->rs485_config = atmel_config_rs485;
+ port->membase = NULL;
memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
- if (pdata && pdata->regs) {
- /* Already mapped by setup code */
- port->membase = pdata->regs;
- } else {
- port->flags |= UPF_IOREMAP;
- port->membase = NULL;
- }
-
/* for console, the clock could already be configured */
if (!atmel_port->clk) {
atmel_port->clk = clk_get(&pdev->dev, "usart");
@@ -2460,8 +2419,6 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
return 0;
}
-struct platform_device *atmel_default_console_device; /* the serial console device */
-
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
static void atmel_console_putchar(struct uart_port *port, int ch)
{
@@ -2594,47 +2551,6 @@ static struct console atmel_console = {
#define ATMEL_CONSOLE_DEVICE (&atmel_console)
-/*
- * Early console initialization (before VM subsystem initialized).
- */
-static int __init atmel_console_init(void)
-{
- int ret;
- if (atmel_default_console_device) {
- struct atmel_uart_data *pdata =
- dev_get_platdata(&atmel_default_console_device->dev);
- int id = pdata->num;
- struct atmel_uart_port *atmel_port = &atmel_ports[id];
-
- atmel_port->backup_imr = 0;
- atmel_port->uart.line = id;
-
- add_preferred_console(ATMEL_DEVICENAME, id, NULL);
- ret = atmel_init_port(atmel_port, atmel_default_console_device);
- if (ret)
- return ret;
- register_console(&atmel_console);
- }
-
- return 0;
-}
-
-console_initcall(atmel_console_init);
-
-/*
- * Late console initialization.
- */
-static int __init atmel_late_console_init(void)
-{
- if (atmel_default_console_device
- && !(atmel_console.flags & CON_ENABLED))
- register_console(&atmel_console);
-
- return 0;
-}
-
-core_initcall(atmel_late_console_init);
-
static inline bool atmel_is_console_port(struct uart_port *port)
{
return port->cons && port->cons->index == port->line;
@@ -2804,19 +2720,13 @@ static int atmel_serial_probe(struct platform_device *pdev)
{
struct atmel_uart_port *atmel_port;
struct device_node *np = pdev->dev.of_node;
- struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev);
void *data;
int ret = -ENODEV;
bool rs485_enabled;
BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1));
- if (np)
- ret = of_alias_get_id(np, "serial");
- else
- if (pdata)
- ret = pdata->num;
-
+ ret = of_alias_get_id(np, "serial");
if (ret < 0)
/* port id not found in platform data nor device-tree aliases:
* auto-enumerate it */
generated by cgit (git 2.34.1) at 2024-05-19 09:38:51 +0000