| /* |
| * Driver for OMAP-UART controller. |
| * Based on drivers/serial/8250.c |
| * |
| * Copyright (C) 2010 Texas Instruments. |
| * |
| * Authors: |
| * Govindraj R <govindraj.raja@ti.com> |
| * Thara Gopinath <thara@ti.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #ifndef __OMAP_SERIAL_H__ |
| #define __OMAP_SERIAL_H__ |
| |
| #include <linux/serial_core.h> |
| #include <linux/platform_device.h> |
| |
| #include <plat/mux.h> |
| |
| #define DRIVER_NAME "omap_uart" |
| |
| /* |
| * Use tty device name as ttyO, [O -> OMAP] |
| * in bootargs we specify as console=ttyO0 if uart1 |
| * is used as console uart. |
| */ |
| #define OMAP_SERIAL_NAME "ttyO" |
| |
| #define OMAP_MODE13X_SPEED 230400 |
| |
| /* WER = 0x7F |
| * Enable module level wakeup in WER reg |
| */ |
| #define OMAP_UART_WER_MOD_WKUP 0X7F |
| |
| /* Enable XON/XOFF flow control on output */ |
| #define OMAP_UART_SW_TX 0x04 |
| |
| /* Enable XON/XOFF flow control on input */ |
| #define OMAP_UART_SW_RX 0x04 |
| |
| #define OMAP_UART_SYSC_RESET 0X07 |
| #define OMAP_UART_TCR_TRIG 0X0F |
| #define OMAP_UART_SW_CLR 0XF0 |
| #define OMAP_UART_FIFO_CLR 0X06 |
| |
| #define OMAP_UART_DMA_CH_FREE -1 |
| |
| #define RX_TIMEOUT (3 * HZ) |
| #define OMAP_MAX_HSUART_PORTS 6 |
| |
| #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA |
| |
| struct omap_uart_port_info { |
| bool dma_enabled; /* To specify DMA Mode */ |
| unsigned int uartclk; /* UART clock rate */ |
| void __iomem *membase; /* ioremap cookie or NULL */ |
| resource_size_t mapbase; /* resource base */ |
| unsigned long irqflags; /* request_irq flags */ |
| upf_t flags; /* UPF_* flags */ |
| }; |
| |
| struct uart_omap_dma { |
| u8 uart_dma_tx; |
| u8 uart_dma_rx; |
| int rx_dma_channel; |
| int tx_dma_channel; |
| dma_addr_t rx_buf_dma_phys; |
| dma_addr_t tx_buf_dma_phys; |
| unsigned int uart_base; |
| /* |
| * Buffer for rx dma.It is not required for tx because the buffer |
| * comes from port structure. |
| */ |
| unsigned char *rx_buf; |
| unsigned int prev_rx_dma_pos; |
| int tx_buf_size; |
| int tx_dma_used; |
| int rx_dma_used; |
| spinlock_t tx_lock; |
| spinlock_t rx_lock; |
| /* timer to poll activity on rx dma */ |
| struct timer_list rx_timer; |
| int rx_buf_size; |
| int rx_timeout; |
| }; |
| |
| struct uart_omap_port { |
| struct uart_port port; |
| struct uart_omap_dma uart_dma; |
| struct platform_device *pdev; |
| |
| unsigned char ier; |
| unsigned char lcr; |
| unsigned char mcr; |
| unsigned char fcr; |
| unsigned char efr; |
| |
| int use_dma; |
| /* |
| * Some bits in registers are cleared on a read, so they must |
| * be saved whenever the register is read but the bits will not |
| * be immediately processed. |
| */ |
| unsigned int lsr_break_flag; |
| unsigned char msr_saved_flags; |
| char name[20]; |
| unsigned long port_activity; |
| }; |
| |
| #endif /* __OMAP_SERIAL_H__ */ |
