diff options
Diffstat (limited to 'drivers/tty/serial/atmel_serial.c')
-rw-r--r-- | drivers/tty/serial/atmel_serial.c | 164 |
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 */ |