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Commit d307d36a authored by Sonic Zhang's avatar Sonic Zhang Committed by Linus Torvalds
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tty: Blackin CTS/RTS 



Both software emulated and hardware based CTS and RTS are enabled in
serial driver.

The CTS RTS PIN connection on BF548 UART port is defined as a modem
device not as a host device.  In order to test it under Linux, please
nake a cross UART cable to exchange CTS and RTS signal.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarAlan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6f95570e

arch/blackfin/mach-bf518/include/mach/bfin_serial_5xx.h

+7 −3
Original line number Diff line number Diff line
@@ -53,9 +53,9 @@ 
#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)

#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)



#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)

#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_GET_CTS(x) (!gpio_get_value(x->cts_pin))

#define UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)

#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
@@ -87,6 +87,7 @@ 
struct bfin_serial_port {

	struct uart_port port;

	unsigned int old_status;

	int status_irq;

	unsigned int lsr;

#ifdef CONFIG_SERIAL_BFIN_DMA

	int tx_done;
@@ -125,6 +126,7 @@ static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart) 
struct bfin_serial_res {

	unsigned long uart_base_addr;

	int uart_irq;

	int uart_status_irq;

#ifdef CONFIG_SERIAL_BFIN_DMA

	unsigned int uart_tx_dma_channel;

	unsigned int uart_rx_dma_channel;
@@ -140,6 +142,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	 0xFFC00400,

	 IRQ_UART0_RX,

	 IRQ_UART0_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	 CH_UART0_TX,

	 CH_UART0_RX,
@@ -154,6 +157,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	 0xFFC02000,

	 IRQ_UART1_RX,

	 IRQ_UART1_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	 CH_UART1_TX,

	 CH_UART1_RX,

arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h

+7 −3
Original line number Diff line number Diff line
@@ -53,9 +53,9 @@ 
#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)

#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)



#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)

#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_GET_CTS(x) (!gpio_get_value(x->cts_pin))

#define UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)

#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
@@ -87,6 +87,7 @@ 
struct bfin_serial_port {

	struct uart_port port;

	unsigned int old_status;

	int status_irq;

	unsigned int lsr;

#ifdef CONFIG_SERIAL_BFIN_DMA

	int tx_done;
@@ -125,6 +126,7 @@ static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart) 
struct bfin_serial_res {

	unsigned long uart_base_addr;

	int uart_irq;

	int uart_status_irq;

#ifdef CONFIG_SERIAL_BFIN_DMA

	unsigned int uart_tx_dma_channel;

	unsigned int uart_rx_dma_channel;
@@ -140,6 +142,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	 0xFFC00400,

	 IRQ_UART0_RX,

	 IRQ_UART0_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	 CH_UART0_TX,

	 CH_UART0_RX,
@@ -154,6 +157,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	 0xFFC02000,

	 IRQ_UART1_RX,

	 IRQ_UART1_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	 CH_UART1_TX,

	 CH_UART1_RX,

arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h

+6 −3
Original line number Diff line number Diff line
@@ -53,9 +53,9 @@ 
#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)

#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)



#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)

#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_GET_CTS(x) (!gpio_get_value(x->cts_pin))

#define UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)

#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
@@ -74,6 +74,7 @@ 
struct bfin_serial_port {

        struct uart_port        port;

        unsigned int            old_status;

	int			status_irq;

	unsigned int lsr;

#ifdef CONFIG_SERIAL_BFIN_DMA

	int			tx_done;
@@ -116,6 +117,7 @@ static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart) 
struct bfin_serial_res {

	unsigned long	uart_base_addr;

	int		uart_irq;

	int		uart_status_irq;

#ifdef CONFIG_SERIAL_BFIN_DMA

	unsigned int	uart_tx_dma_channel;

	unsigned int	uart_rx_dma_channel;
@@ -130,6 +132,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	0xFFC00400,

	IRQ_UART_RX,

	IRQ_UART_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	CH_UART_TX,

	CH_UART_RX,

arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h

+7 −3
Original line number Diff line number Diff line
@@ -53,9 +53,9 @@ 
#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)

#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)



#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)

#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_GET_CTS(x) (!gpio_get_value(x->cts_pin))

#define UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)

#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
@@ -87,6 +87,7 @@ 
struct bfin_serial_port {

        struct uart_port        port;

        unsigned int            old_status;

	int			status_irq;

	unsigned int lsr;

#ifdef CONFIG_SERIAL_BFIN_DMA

	int			tx_done;
@@ -124,6 +125,7 @@ static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart) 
struct bfin_serial_res {

	unsigned long	uart_base_addr;

	int		uart_irq;

	int		uart_status_irq;

#ifdef CONFIG_SERIAL_BFIN_DMA

	unsigned int	uart_tx_dma_channel;

	unsigned int	uart_rx_dma_channel;
@@ -139,6 +141,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	0xFFC00400,

	IRQ_UART0_RX,

	IRQ_UART0_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	CH_UART0_TX,

	CH_UART0_RX,
@@ -153,6 +156,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	0xFFC02000,

	IRQ_UART1_RX,

	IRQ_UART1_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	CH_UART1_TX,

	CH_UART1_RX,

arch/blackfin/mach-bf538/include/mach/bfin_serial_5xx.h

+7 −3
Original line number Diff line number Diff line
@@ -53,9 +53,9 @@ 
#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)

#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)



#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)

#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_GET_CTS(x) (!gpio_get_value(x->cts_pin))

#define UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1)

#define UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0)

#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)

#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
@@ -87,6 +87,7 @@ 
struct bfin_serial_port {

	struct uart_port	port;

	unsigned int		old_status;

	int			status_irq;

	unsigned int lsr;

#ifdef CONFIG_SERIAL_BFIN_DMA

	int			tx_done;
@@ -125,6 +126,7 @@ static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart) 
struct bfin_serial_res {

	unsigned long	uart_base_addr;

	int		uart_irq;

	int		uart_status_irq;

#ifdef CONFIG_SERIAL_BFIN_DMA

	unsigned int	uart_tx_dma_channel;

	unsigned int	uart_rx_dma_channel;
@@ -140,6 +142,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	0xFFC00400,

	IRQ_UART0_RX,

	IRQ_UART0_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	CH_UART0_TX,

	CH_UART0_RX,
@@ -154,6 +157,7 @@ struct bfin_serial_res bfin_serial_resource[] = { 
	{

	0xFFC02000,

	IRQ_UART1_RX,

	IRQ_UART1_ERROR,

#ifdef CONFIG_SERIAL_BFIN_DMA

	CH_UART1_TX,

	CH_UART1_RX,