The patch titled blackfin serial driver: change hardware flowcontrol from poll to interrupt driven. has been removed from the -mm tree. Its filename was blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: blackfin serial driver: change hardware flowcontrol from poll to interrupt driven. From: Sonic Zhang <sonic.zhang@xxxxxxxxxx> Only CTS bit is affected. Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx> Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx> Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h | 26 - arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h | 20 - arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h | 27 -- arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h | 45 --- arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h | 20 - drivers/serial/bfin_5xx.c | 131 ++++++---- 6 files changed, 82 insertions(+), 187 deletions(-) diff -puN arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h --- a/arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven +++ a/arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h @@ -167,29 +167,3 @@ struct bfin_serial_res bfin_serial_resou }; #define DRIVER_NAME "bfin-uart" - -static void bfin_serial_hw_init(struct bfin_serial_port *uart) -{ - -#ifdef CONFIG_SERIAL_BFIN_UART0 - peripheral_request(P_UART0_TX, DRIVER_NAME); - peripheral_request(P_UART0_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_UART1 - peripheral_request(P_UART1_TX, DRIVER_NAME); - peripheral_request(P_UART1_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) { - gpio_request(uart->cts_pin, DRIVER_NAME); - gpio_direction_input(uart->cts_pin); - } - - if (uart->rts_pin >= 0) { - gpio_request(uart->rts_pin, DRIVER_NAME); - gpio_direction_output(uart->rts_pin, 0); - } -#endif -} diff -puN arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h --- a/arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven +++ a/arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h @@ -142,23 +142,3 @@ struct bfin_serial_res bfin_serial_resou }; #define DRIVER_NAME "bfin-uart" - -static void bfin_serial_hw_init(struct bfin_serial_port *uart) -{ - -#ifdef CONFIG_SERIAL_BFIN_UART0 - peripheral_request(P_UART0_TX, DRIVER_NAME); - peripheral_request(P_UART0_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) { - gpio_request(uart->cts_pin, DRIVER_NAME); - gpio_direction_input(uart->cts_pin); - } - if (uart->rts_pin >= 0) { - gpio_request(uart->rts_pin, DRIVER_NAME); - gpio_direction_output(uart->rts_pin, 0); - } -#endif -} diff -puN arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h --- a/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven +++ a/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h @@ -99,7 +99,6 @@ struct bfin_serial_port { struct work_struct tx_dma_workqueue; #endif #ifdef CONFIG_SERIAL_BFIN_CTSRTS - struct timer_list cts_timer; int cts_pin; int rts_pin; #endif @@ -167,29 +166,3 @@ struct bfin_serial_res bfin_serial_resou }; #define DRIVER_NAME "bfin-uart" - -static void bfin_serial_hw_init(struct bfin_serial_port *uart) -{ - -#ifdef CONFIG_SERIAL_BFIN_UART0 - peripheral_request(P_UART0_TX, DRIVER_NAME); - peripheral_request(P_UART0_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_UART1 - peripheral_request(P_UART1_TX, DRIVER_NAME); - peripheral_request(P_UART1_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) { - gpio_request(uart->cts_pin, DRIVER_NAME); - gpio_direction_input(uart->cts_pin); - } - - if (uart->rts_pin >= 0) { - gpio_request(uart->rts_pin, DRIVER_NAME); - gpio_direction_output(uart->rts_pin, 0); - } -#endif -} diff -puN arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h --- a/arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven +++ a/arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h @@ -181,48 +181,3 @@ struct bfin_serial_res bfin_serial_resou }; #define DRIVER_NAME "bfin-uart" - -static void bfin_serial_hw_init(struct bfin_serial_port *uart) -{ -#ifdef CONFIG_SERIAL_BFIN_UART0 - peripheral_request(P_UART0_TX, DRIVER_NAME); - peripheral_request(P_UART0_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_UART1 - peripheral_request(P_UART1_TX, DRIVER_NAME); - peripheral_request(P_UART1_RX, DRIVER_NAME); - -#ifdef CONFIG_BFIN_UART1_CTSRTS - peripheral_request(P_UART1_RTS, DRIVER_NAME); - peripheral_request(P_UART1_CTS, DRIVER_NAME); -#endif -#endif - -#ifdef CONFIG_SERIAL_BFIN_UART2 - peripheral_request(P_UART2_TX, DRIVER_NAME); - peripheral_request(P_UART2_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_UART3 - peripheral_request(P_UART3_TX, DRIVER_NAME); - peripheral_request(P_UART3_RX, DRIVER_NAME); - -#ifdef CONFIG_BFIN_UART3_CTSRTS - peripheral_request(P_UART3_RTS, DRIVER_NAME); - peripheral_request(P_UART3_CTS, DRIVER_NAME); -#endif -#endif - SSYNC(); -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) { - gpio_request(uart->cts_pin, DRIVER_NAME); - gpio_direction_input(uart->cts_pin); - } - - if (uart->rts_pin >= 0) { - gpio_request(uart->rts_pin, DRIVER_NAME); - gpio_direction_output(uart->rts_pin, 0); - } -#endif -} diff -puN arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h --- a/arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven +++ a/arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h @@ -142,23 +142,3 @@ struct bfin_serial_res bfin_serial_resou }; #define DRIVER_NAME "bfin-uart" - -static void bfin_serial_hw_init(struct bfin_serial_port *uart) -{ - -#ifdef CONFIG_SERIAL_BFIN_UART0 - peripheral_request(P_UART0_TX, DRIVER_NAME); - peripheral_request(P_UART0_RX, DRIVER_NAME); -#endif - -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) { - gpio_request(uart->cts_pin, DRIVER_NAME); - gpio_direction_input(uart->cts_pin); - } - if (uart->rts_pin >= 0) { - gpio_request(uart->rts_pin, DRIVER_NAME); - gpio_direction_output(uart->rts_pin, 0); - } -#endif -} diff -puN drivers/serial/bfin_5xx.c~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven drivers/serial/bfin_5xx.c --- a/drivers/serial/bfin_5xx.c~blackfin-serial-driver-change-hardware-flowcontrol-from-poll-to-interrupt-driven +++ a/drivers/serial/bfin_5xx.c @@ -64,7 +64,6 @@ static int kgdboc_break_enabled; #define DMA_RX_YCOUNT (PAGE_SIZE / DMA_RX_XCOUNT) #define DMA_RX_FLUSH_JIFFIES (HZ / 50) -#define CTS_CHECK_JIFFIES (HZ / 50) #ifdef CONFIG_SERIAL_BFIN_DMA static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart); @@ -72,8 +71,6 @@ static void bfin_serial_dma_tx_chars(str static void bfin_serial_tx_chars(struct bfin_serial_port *uart); #endif -static void bfin_serial_mctrl_check(struct bfin_serial_port *uart); - static void bfin_serial_reset_irda(struct uart_port *port); /* @@ -265,12 +262,6 @@ static void bfin_serial_tx_chars(struct { struct circ_buf *xmit = &uart->port.info->xmit; - /* - * Check the modem control lines before - * transmitting anything. - */ - bfin_serial_mctrl_check(uart); - if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { #ifdef CONFIG_BF54x /* Clear TFI bit */ @@ -329,12 +320,6 @@ static void bfin_serial_dma_tx_chars(str uart->tx_done = 0; - /* - * Check the modem control lines before - * transmitting anything. - */ - bfin_serial_mctrl_check(uart); - if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { uart->tx_count = 0; uart->tx_done = 1; @@ -524,29 +509,21 @@ static void bfin_serial_set_mctrl(struct #endif } +#ifdef CONFIG_SERIAL_BFIN_CTSRTS /* - * Handle any change of modem status signal since we were last called. + * Handle any change of modem status signal. */ -static void bfin_serial_mctrl_check(struct bfin_serial_port *uart) +static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id) { -#ifdef CONFIG_SERIAL_BFIN_CTSRTS + struct bfin_serial_port *uart = dev_id; unsigned int status; - struct uart_info *info = uart->port.info; - struct tty_struct *tty = info->port.tty; status = bfin_serial_get_mctrl(&uart->port); uart_handle_cts_change(&uart->port, status & TIOCM_CTS); - if (!(status & TIOCM_CTS)) { - tty->hw_stopped = 1; - uart->cts_timer.data = (unsigned long)(uart); - uart->cts_timer.function = (void *)bfin_serial_mctrl_check; - uart->cts_timer.expires = jiffies + CTS_CHECK_JIFFIES; - add_timer(&(uart->cts_timer)); - } else { - tty->hw_stopped = 0; - } -#endif + + return IRQ_HANDLED; } +#endif /* * Interrupts are always disabled. @@ -606,7 +583,7 @@ static int bfin_serial_startup(struct ua uart->rx_dma_timer.expires = jiffies + DMA_RX_FLUSH_JIFFIES; add_timer(&(uart->rx_dma_timer)); #else -#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ +# if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) if (kgdboc_port_line == uart->port.line && kgdboc_break_enabled) kgdboc_break_enabled = 0; @@ -661,11 +638,28 @@ static int bfin_serial_startup(struct ua } } # endif -#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ +# if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) } # endif #endif + +#ifdef CONFIG_SERIAL_BFIN_CTSRTS + if (uart->cts_pin >= 0) { + if (request_irq(gpio_to_irq(uart->cts_pin), + bfin_serial_mctrl_cts_int, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | + IRQF_DISABLED, "BFIN_UART_CTS", uart)) { + uart->cts_pin = -1; + pr_info("Unable to attach BlackFin UART CTS interrupt.\ + So, disable it.\n"); + } + } + if (uart->rts_pin >= 0) { + gpio_request(uart->rts_pin, DRIVER_NAME); + gpio_direction_output(uart->rts_pin, 0); + } +#endif UART_SET_IER(uart, ERBFI); return 0; } @@ -699,6 +693,13 @@ static void bfin_serial_shutdown(struct free_irq(uart->port.irq, uart); free_irq(uart->port.irq+1, uart); #endif + +# ifdef CONFIG_SERIAL_BFIN_CTSRTS + if (uart->cts_pin >= 0) + free_irq(gpio_to_irq(uart->cts_pin), uart); + if (uart->rts_pin >= 0) + gpio_free(uart->rts_pin); +# endif } static void @@ -864,6 +865,20 @@ static void bfin_serial_set_ldisc(struct } } +static void bfin_serial_reset_irda(struct uart_port *port) +{ + int line = port->line; + unsigned short val; + + val = UART_GET_GCTL(&bfin_serial_ports[line]); + val &= ~(IREN | RPOLC); + UART_PUT_GCTL(&bfin_serial_ports[line], val); + SSYNC(); + val |= (IREN | RPOLC); + UART_PUT_GCTL(&bfin_serial_ports[line], val); + SSYNC(); +} + #ifdef CONFIG_CONSOLE_POLL static void bfin_serial_poll_put_char(struct uart_port *port, unsigned char chr) { @@ -909,20 +924,6 @@ static int bfin_kgdboc_port_startup(stru } #endif -static void bfin_serial_reset_irda(struct uart_port *port) -{ - int line = port->line; - unsigned short val; - - val = UART_GET_GCTL(&bfin_serial_ports[line]); - val &= ~(IREN | RPOLC); - UART_PUT_GCTL(&bfin_serial_ports[line], val); - SSYNC(); - val |= (IREN | RPOLC); - UART_PUT_GCTL(&bfin_serial_ports[line], val); - SSYNC(); -} - static struct uart_ops bfin_serial_pops = { .tx_empty = bfin_serial_tx_empty, .set_mctrl = bfin_serial_set_mctrl, @@ -952,6 +953,39 @@ static struct uart_ops bfin_serial_pops #endif }; +static void __init bfin_serial_hw_init(void) +{ +#ifdef CONFIG_SERIAL_BFIN_UART0 + peripheral_request(P_UART0_TX, DRIVER_NAME); + peripheral_request(P_UART0_RX, DRIVER_NAME); +#endif + +#ifdef CONFIG_SERIAL_BFIN_UART1 + peripheral_request(P_UART1_TX, DRIVER_NAME); + peripheral_request(P_UART1_RX, DRIVER_NAME); + +# if defined(CONFIG_BFIN_UART1_CTSRTS) && defined(CONFIG_BF54x) + peripheral_request(P_UART1_RTS, DRIVER_NAME); + peripheral_request(P_UART1_CTS, DRIVER_NAME); +# endif +#endif + +#ifdef CONFIG_SERIAL_BFIN_UART2 + peripheral_request(P_UART2_TX, DRIVER_NAME); + peripheral_request(P_UART2_RX, DRIVER_NAME); +#endif + +#ifdef CONFIG_SERIAL_BFIN_UART3 + peripheral_request(P_UART3_TX, DRIVER_NAME); + peripheral_request(P_UART3_RX, DRIVER_NAME); + +# if defined(CONFIG_BFIN_UART3_CTSRTS) && defined(CONFIG_BF54x) + peripheral_request(P_UART3_RTS, DRIVER_NAME); + peripheral_request(P_UART3_CTS, DRIVER_NAME); +# endif +#endif +} + static void __init bfin_serial_init_ports(void) { static int first = 1; @@ -961,6 +995,8 @@ static void __init bfin_serial_init_port return; first = 0; + bfin_serial_hw_init(); + for (i = 0; i < nr_active_ports; i++) { bfin_serial_ports[i].port.uartclk = get_sclk(); bfin_serial_ports[i].port.fifosize = BFIN_UART_TX_FIFO_SIZE; @@ -984,15 +1020,12 @@ static void __init bfin_serial_init_port init_timer(&(bfin_serial_ports[i].rx_dma_timer)); #endif #ifdef CONFIG_SERIAL_BFIN_CTSRTS - init_timer(&(bfin_serial_ports[i].cts_timer)); bfin_serial_ports[i].cts_pin = bfin_serial_resource[i].uart_cts_pin; bfin_serial_ports[i].rts_pin = bfin_serial_resource[i].uart_rts_pin; #endif - bfin_serial_hw_init(&bfin_serial_ports[i]); } - } #if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK) _ Patches currently in -mm which might be from sonic.zhang@xxxxxxxxxx are origin.patch linux-next.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html