diff options
Diffstat (limited to 'drivers/tty/serial/atmel_serial.c')
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 139 |
1 files changed, 80 insertions, 59 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index eaf7dc7795b8..1db68713d656 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -1370,6 +1370,80 @@ static void atmel_tasklet_func(unsigned long data) spin_unlock(&port->lock); } +static int 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 = pdev->dev.platform_data; + + if (np) { + /* DMA/PDC usage specification */ + if (of_get_property(np, "atmel,use-dma-rx", NULL)) { + if (of_get_property(np, "dmas", NULL)) { + 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; + } + } else { + atmel_port->use_dma_rx = false; + atmel_port->use_pdc_rx = false; + } + + if (of_get_property(np, "atmel,use-dma-tx", NULL)) { + if (of_get_property(np, "dmas", NULL)) { + 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; + } + } else { + atmel_port->use_dma_tx = false; + atmel_port->use_pdc_tx = false; + } + + } 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; + } + + return 0; +} + +static void atmel_init_rs485(struct atmel_uart_port *atmel_port, + struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct atmel_uart_data *pdata = pdev->dev.platform_data; + + if (np) { + u32 rs485_delay[2]; + /* rs485 properties */ + if (of_property_read_u32_array(np, "rs485-rts-delay", + rs485_delay, 2) == 0) { + struct serial_rs485 *rs485conf = &atmel_port->rs485; + + 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; + } + } else { + atmel_port->rs485 = pdata->rs485; + } + +} + static void atmel_set_ops(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); @@ -1408,6 +1482,7 @@ static void atmel_set_ops(struct uart_port *port) */ static int atmel_startup(struct uart_port *port) { + struct platform_device *pdev = to_platform_device(port->dev); struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); struct tty_struct *tty = port->state->port.tty; int retval; @@ -1432,6 +1507,8 @@ static int atmel_startup(struct uart_port *port) /* * Initialize DMA (if necessary) */ + atmel_init_property(atmel_port, pdev); + if (atmel_port->prepare_rx) { retval = atmel_port->prepare_rx(port); if (retval < 0) @@ -1877,55 +1954,6 @@ static struct uart_ops atmel_pops = { #endif }; -static void atmel_of_init_port(struct atmel_uart_port *atmel_port, - struct device_node *np) -{ - u32 rs485_delay[2]; - - /* DMA/PDC usage specification */ - if (of_get_property(np, "atmel,use-dma-rx", NULL)) { - if (of_get_property(np, "dmas", NULL)) { - 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; - } - } else { - atmel_port->use_dma_rx = false; - atmel_port->use_pdc_rx = false; - } - - if (of_get_property(np, "atmel,use-dma-tx", NULL)) { - if (of_get_property(np, "dmas", NULL)) { - 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; - } - } else { - atmel_port->use_dma_tx = false; - atmel_port->use_pdc_tx = false; - } - - /* rs485 properties */ - if (of_property_read_u32_array(np, "rs485-rts-delay", - rs485_delay, 2) == 0) { - struct serial_rs485 *rs485conf = &atmel_port->rs485; - - 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; - } -} - /* * Configure the port from the platform device resource info. */ @@ -1936,17 +1964,10 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, struct uart_port *port = &atmel_port->uart; struct atmel_uart_data *pdata = pdev->dev.platform_data; - if (pdev->dev.of_node) { - atmel_of_init_port(atmel_port, pdev->dev.of_node); - } 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->rs485 = pdata->rs485; - } + if (!atmel_init_property(atmel_port, pdev)) + atmel_set_ops(port); - atmel_set_ops(port); + atmel_init_rs485(atmel_port, pdev); port->iotype = UPIO_MEM; port->flags = UPF_BOOT_AUTOCONF; |
