Commit f4d640c9 authored by Roy Huang's avatar Roy Huang Committed by Bryan Wu

Blackfin serial driver: supporting BF548-EZKIT serial port

Signed-off-by: default avatarRoy Huang <roy.huang@analog.com>
Signed-off-by: default avatarMike Frysinger <michael.frysinger@analog.com>
Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
parent db83b991
...@@ -599,7 +599,7 @@ config UART0_RTS_PIN ...@@ -599,7 +599,7 @@ config UART0_RTS_PIN
config SERIAL_BFIN_UART1 config SERIAL_BFIN_UART1
bool "Enable UART1" bool "Enable UART1"
depends on SERIAL_BFIN && (BF534 || BF536 || BF537) depends on SERIAL_BFIN && (BF534 || BF536 || BF537 || BF54x)
help help
Enable UART1 Enable UART1
...@@ -612,18 +612,58 @@ config BFIN_UART1_CTSRTS ...@@ -612,18 +612,58 @@ config BFIN_UART1_CTSRTS
config UART1_CTS_PIN config UART1_CTS_PIN
int "UART1 CTS pin" int "UART1 CTS pin"
depends on BFIN_UART1_CTSRTS depends on BFIN_UART1_CTSRTS && (BF53x || BF561)
default -1 default -1
help help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map. Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
config UART1_RTS_PIN config UART1_RTS_PIN
int "UART1 RTS pin" int "UART1 RTS pin"
depends on BFIN_UART1_CTSRTS depends on BFIN_UART1_CTSRTS && (BF53x || BF561)
default -1 default -1
help help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map. Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
config SERIAL_BFIN_UART2
bool "Enable UART2"
depends on SERIAL_BFIN && (BF54x)
help
Enable UART2
config BFIN_UART2_CTSRTS
bool "Enable UART2 hardware flow control"
depends on SERIAL_BFIN_UART2
help
Enable hardware flow control in the driver. Using GPIO emulate the CTS/RTS
signal.
config UART2_CTS_PIN
int "UART2 CTS pin"
depends on BFIN_UART2_CTSRTS
default -1
help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
config UART2_RTS_PIN
int "UART2 RTS pin"
depends on BFIN_UART2_CTSRTS
default -1
help
Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
config SERIAL_BFIN_UART3
bool "Enable UART3"
depends on SERIAL_BFIN && (BF54x)
help
Enable UART3
config BFIN_UART3_CTSRTS
bool "Enable UART3 hardware flow control"
depends on SERIAL_BFIN_UART3
help
Enable hardware flow control in the driver. Using GPIO emulate the CTS/RTS
signal.
config SERIAL_IMX config SERIAL_IMX
bool "IMX serial port support" bool "IMX serial port support"
depends on ARM && ARCH_IMX depends on ARM && ARCH_IMX
......
...@@ -86,8 +86,21 @@ static void bfin_serial_stop_tx(struct uart_port *port) ...@@ -86,8 +86,21 @@ static void bfin_serial_stop_tx(struct uart_port *port)
{ {
struct bfin_serial_port *uart = (struct bfin_serial_port *)port; struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
#ifdef CONFIG_BF54x
while (!(UART_GET_LSR(uart) & TEMT))
continue;
#endif
#ifdef CONFIG_SERIAL_BFIN_DMA #ifdef CONFIG_SERIAL_BFIN_DMA
disable_dma(uart->tx_dma_channel); disable_dma(uart->tx_dma_channel);
#else
#ifdef CONFIG_BF54x
/* Waiting for Transmission Finished */
while (!(UART_GET_LSR(uart) & TFI))
continue;
/* Clear TFI bit */
UART_PUT_LSR(uart, TFI);
UART_CLEAR_IER(uart, ETBEI);
#else #else
unsigned short ier; unsigned short ier;
...@@ -95,6 +108,7 @@ static void bfin_serial_stop_tx(struct uart_port *port) ...@@ -95,6 +108,7 @@ static void bfin_serial_stop_tx(struct uart_port *port)
ier &= ~ETBEI; ier &= ~ETBEI;
UART_PUT_IER(uart, ier); UART_PUT_IER(uart, ier);
#endif #endif
#endif
} }
/* /*
...@@ -106,6 +120,9 @@ static void bfin_serial_start_tx(struct uart_port *port) ...@@ -106,6 +120,9 @@ static void bfin_serial_start_tx(struct uart_port *port)
#ifdef CONFIG_SERIAL_BFIN_DMA #ifdef CONFIG_SERIAL_BFIN_DMA
bfin_serial_dma_tx_chars(uart); bfin_serial_dma_tx_chars(uart);
#else
#ifdef CONFIG_BF54x
UART_SET_IER(uart, ETBEI);
#else #else
unsigned short ier; unsigned short ier;
ier = UART_GET_IER(uart); ier = UART_GET_IER(uart);
...@@ -113,6 +130,7 @@ static void bfin_serial_start_tx(struct uart_port *port) ...@@ -113,6 +130,7 @@ static void bfin_serial_start_tx(struct uart_port *port)
UART_PUT_IER(uart, ier); UART_PUT_IER(uart, ier);
bfin_serial_tx_chars(uart); bfin_serial_tx_chars(uart);
#endif #endif
#endif
} }
/* /*
...@@ -121,6 +139,9 @@ static void bfin_serial_start_tx(struct uart_port *port) ...@@ -121,6 +139,9 @@ static void bfin_serial_start_tx(struct uart_port *port)
static void bfin_serial_stop_rx(struct uart_port *port) static void bfin_serial_stop_rx(struct uart_port *port)
{ {
struct bfin_serial_port *uart = (struct bfin_serial_port *)port; struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
#ifdef CONFIG_BF54x
UART_CLEAR_IER(uart, ERBFI);
#else
unsigned short ier; unsigned short ier;
ier = UART_GET_IER(uart); ier = UART_GET_IER(uart);
...@@ -129,6 +150,7 @@ static void bfin_serial_stop_rx(struct uart_port *port) ...@@ -129,6 +150,7 @@ static void bfin_serial_stop_rx(struct uart_port *port)
#endif #endif
ier &= ~ERBFI; ier &= ~ERBFI;
UART_PUT_IER(uart, ier); UART_PUT_IER(uart, ier);
#endif
} }
/* /*
...@@ -325,10 +347,21 @@ static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id) ...@@ -325,10 +347,21 @@ static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id)
{ {
struct bfin_serial_port *uart = dev_id; struct bfin_serial_port *uart = dev_id;
#ifdef CONFIG_BF54x
unsigned short status;
spin_lock(&uart->port.lock);
status = UART_GET_LSR(uart);
while ((UART_GET_IER(uart) & ERBFI) && (status & DR)) {
bfin_serial_rx_chars(uart);
status = UART_GET_LSR(uart);
}
spin_unlock(&uart->port.lock);
#else
spin_lock(&uart->port.lock); spin_lock(&uart->port.lock);
while ((UART_GET_IIR(uart) & IIR_STATUS) == IIR_RX_READY) while ((UART_GET_IIR(uart) & IIR_STATUS) == IIR_RX_READY)
bfin_serial_rx_chars(uart); bfin_serial_rx_chars(uart);
spin_unlock(&uart->port.lock); spin_unlock(&uart->port.lock);
#endif
return IRQ_HANDLED; return IRQ_HANDLED;
} }
...@@ -336,10 +369,21 @@ static irqreturn_t bfin_serial_tx_int(int irq, void *dev_id) ...@@ -336,10 +369,21 @@ static irqreturn_t bfin_serial_tx_int(int irq, void *dev_id)
{ {
struct bfin_serial_port *uart = dev_id; struct bfin_serial_port *uart = dev_id;
#ifdef CONFIG_BF54x
unsigned short status;
spin_lock(&uart->port.lock);
status = UART_GET_LSR(uart);
while ((UART_GET_IER(uart) & ETBEI) && (status & THRE)) {
bfin_serial_tx_chars(uart);
status = UART_GET_LSR(uart);
}
spin_unlock(&uart->port.lock);
#else
spin_lock(&uart->port.lock); spin_lock(&uart->port.lock);
while ((UART_GET_IIR(uart) & IIR_STATUS) == IIR_TX_READY) while ((UART_GET_IIR(uart) & IIR_STATUS) == IIR_TX_READY)
bfin_serial_tx_chars(uart); bfin_serial_tx_chars(uart);
spin_unlock(&uart->port.lock); spin_unlock(&uart->port.lock);
#endif
return IRQ_HANDLED; return IRQ_HANDLED;
} }
...@@ -350,7 +394,6 @@ static void bfin_serial_do_work(struct work_struct *work) ...@@ -350,7 +394,6 @@ static void bfin_serial_do_work(struct work_struct *work)
bfin_serial_mctrl_check(uart); bfin_serial_mctrl_check(uart);
} }
#endif #endif
#ifdef CONFIG_SERIAL_BFIN_DMA #ifdef CONFIG_SERIAL_BFIN_DMA
...@@ -399,9 +442,13 @@ static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart) ...@@ -399,9 +442,13 @@ static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart)
set_dma_x_count(uart->tx_dma_channel, uart->tx_count); set_dma_x_count(uart->tx_dma_channel, uart->tx_count);
set_dma_x_modify(uart->tx_dma_channel, 1); set_dma_x_modify(uart->tx_dma_channel, 1);
enable_dma(uart->tx_dma_channel); enable_dma(uart->tx_dma_channel);
#ifdef CONFIG_BF54x
UART_SET_IER(uart, ETBEI);
#else
ier = UART_GET_IER(uart); ier = UART_GET_IER(uart);
ier |= ETBEI; ier |= ETBEI;
UART_PUT_IER(uart, ier); UART_PUT_IER(uart, ier);
#endif
spin_unlock_irqrestore(&uart->port.lock, flags); spin_unlock_irqrestore(&uart->port.lock, flags);
} }
...@@ -481,9 +528,13 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id) ...@@ -481,9 +528,13 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id)
if (!(get_dma_curr_irqstat(uart->tx_dma_channel)&DMA_RUN)) { if (!(get_dma_curr_irqstat(uart->tx_dma_channel)&DMA_RUN)) {
clear_dma_irqstat(uart->tx_dma_channel); clear_dma_irqstat(uart->tx_dma_channel);
disable_dma(uart->tx_dma_channel); disable_dma(uart->tx_dma_channel);
#ifdef CONFIG_BF54x
UART_CLEAR_IER(uart, ETBEI);
#else
ier = UART_GET_IER(uart); ier = UART_GET_IER(uart);
ier &= ~ETBEI; ier &= ~ETBEI;
UART_PUT_IER(uart, ier); UART_PUT_IER(uart, ier);
#endif
xmit->tail = (xmit->tail+uart->tx_count) &(UART_XMIT_SIZE -1); xmit->tail = (xmit->tail+uart->tx_count) &(UART_XMIT_SIZE -1);
uart->port.icount.tx+=uart->tx_count; uart->port.icount.tx+=uart->tx_count;
...@@ -665,7 +716,11 @@ static int bfin_serial_startup(struct uart_port *port) ...@@ -665,7 +716,11 @@ static int bfin_serial_startup(struct uart_port *port)
return -EBUSY; return -EBUSY;
} }
#endif #endif
#ifdef CONFIG_BF54x
UART_SET_IER(uart, ERBFI);
#else
UART_PUT_IER(uart, UART_GET_IER(uart) | ERBFI); UART_PUT_IER(uart, UART_GET_IER(uart) | ERBFI);
#endif
return 0; return 0;
} }
...@@ -756,29 +811,41 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, ...@@ -756,29 +811,41 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
/* Disable UART */ /* Disable UART */
ier = UART_GET_IER(uart); ier = UART_GET_IER(uart);
#ifdef CONFIG_BF54x
UART_CLEAR_IER(uart, 0xF);
#else
UART_PUT_IER(uart, 0); UART_PUT_IER(uart, 0);
#endif
#ifndef CONFIG_BF54x
/* Set DLAB in LCR to Access DLL and DLH */ /* Set DLAB in LCR to Access DLL and DLH */
val = UART_GET_LCR(uart); val = UART_GET_LCR(uart);
val |= DLAB; val |= DLAB;
UART_PUT_LCR(uart, val); UART_PUT_LCR(uart, val);
SSYNC(); SSYNC();
#endif
UART_PUT_DLL(uart, quot & 0xFF); UART_PUT_DLL(uart, quot & 0xFF);
SSYNC(); SSYNC();
UART_PUT_DLH(uart, (quot >> 8) & 0xFF); UART_PUT_DLH(uart, (quot >> 8) & 0xFF);
SSYNC(); SSYNC();
#ifndef CONFIG_BF54x
/* Clear DLAB in LCR to Access THR RBR IER */ /* Clear DLAB in LCR to Access THR RBR IER */
val = UART_GET_LCR(uart); val = UART_GET_LCR(uart);
val &= ~DLAB; val &= ~DLAB;
UART_PUT_LCR(uart, val); UART_PUT_LCR(uart, val);
SSYNC(); SSYNC();
#endif
UART_PUT_LCR(uart, lcr); UART_PUT_LCR(uart, lcr);
/* Enable UART */ /* Enable UART */
#ifdef CONFIG_BF54x
UART_SET_IER(uart, ier);
#else
UART_PUT_IER(uart, ier); UART_PUT_IER(uart, ier);
#endif
val = UART_GET_GCTL(uart); val = UART_GET_GCTL(uart);
val |= UCEN; val |= UCEN;
...@@ -890,15 +957,15 @@ static void __init bfin_serial_init_ports(void) ...@@ -890,15 +957,15 @@ static void __init bfin_serial_init_ports(void)
bfin_serial_resource[i].uart_rts_pin; bfin_serial_resource[i].uart_rts_pin;
#endif #endif
bfin_serial_hw_init(&bfin_serial_ports[i]); bfin_serial_hw_init(&bfin_serial_ports[i]);
} }
} }
#ifdef CONFIG_SERIAL_BFIN_CONSOLE #ifdef CONFIG_SERIAL_BFIN_CONSOLE
static void bfin_serial_console_putchar(struct uart_port *port, int ch) static void bfin_serial_console_putchar(struct uart_port *port, int ch)
{ {
struct bfin_serial_port *uart = (struct bfin_serial_port *)port; struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
while (!(UART_GET_LSR(uart))) while (!(UART_GET_LSR(uart) & THRE))
barrier(); barrier();
UART_PUT_CHAR(uart, ch); UART_PUT_CHAR(uart, ch);
SSYNC(); SSYNC();
...@@ -950,18 +1017,22 @@ bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud, ...@@ -950,18 +1017,22 @@ bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
case 2: *bits = 7; break; case 2: *bits = 7; break;
case 3: *bits = 8; break; case 3: *bits = 8; break;
} }
#ifndef CONFIG_BF54x
/* Set DLAB in LCR to Access DLL and DLH */ /* Set DLAB in LCR to Access DLL and DLH */
val = UART_GET_LCR(uart); val = UART_GET_LCR(uart);
val |= DLAB; val |= DLAB;
UART_PUT_LCR(uart, val); UART_PUT_LCR(uart, val);
#endif
dll = UART_GET_DLL(uart); dll = UART_GET_DLL(uart);
dlh = UART_GET_DLH(uart); dlh = UART_GET_DLH(uart);
#ifndef CONFIG_BF54x
/* Clear DLAB in LCR to Access THR RBR IER */ /* Clear DLAB in LCR to Access THR RBR IER */
val = UART_GET_LCR(uart); val = UART_GET_LCR(uart);
val &= ~DLAB; val &= ~DLAB;
UART_PUT_LCR(uart, val); UART_PUT_LCR(uart, val);
#endif
*baud = get_sclk() / (16*(dll | dlh << 8)); *baud = get_sclk() / (16*(dll | dlh << 8));
} }
......
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