text: #ifndef __GRLIB_APBUART_H__
  #define __GRLIB_APBUART_H__
  
  #include <asm/io.h>
  
  #define UART_NR		8
  static int grlib_apbuart_port_nr;
  
  struct grlib_apbuart_regs_map {
  	u32 data;
  	u32 status;
  	u32 ctrl;
  	u32 scaler;
  };
  
  struct amba_prom_registers {
  	unsigned int phys_addr;
  	unsigned int reg_size;
  };
  
  /*
   *  The following defines the bits in the APBUART Status Registers.
   */
  #define UART_STATUS_DR   0x00000001	/* Data Ready */
  #define UART_STATUS_TSE  0x00000002	/* TX Send Register Empty */
  #define UART_STATUS_THE  0x00000004	/* TX Hold Register Empty */
  #define UART_STATUS_BR   0x00000008	/* Break Error */
  #define UART_STATUS_OE   0x00000010	/* RX Overrun Error */
  #define UART_STATUS_PE   0x00000020	/* RX Parity Error */
  #define UART_STATUS_FE   0x00000040	/* RX Framing Error */
  #define UART_STATUS_ERR  0x00000078	/* Error Mask */
  
  /*
   *  The following defines the bits in the APBUART Ctrl Registers.
   */
  #define UART_CTRL_RE     0x00000001	/* Receiver enable */
  #define UART_CTRL_TE     0x00000002	/* Transmitter enable */
  #define UART_CTRL_RI     0x00000004	/* Receiver interrupt enable */
  #define UART_CTRL_TI     0x00000008	/* Transmitter irq */
  #define UART_CTRL_PS     0x00000010	/* Parity select */
  #define UART_CTRL_PE     0x00000020	/* Parity enable */
  #define UART_CTRL_FL     0x00000040	/* Flow control enable */
  #define UART_CTRL_LB     0x00000080	/* Loopback enable */
  
  #define APBBASE(port) ((struct grlib_apbuart_regs_map *)((port)->membase))
  
  #define APBBASE_DATA_P(port)	(&(APBBASE(port)->data))
  #define APBBASE_STATUS_P(port)	(&(APBBASE(port)->status))
  #define APBBASE_CTRL_P(port)	(&(APBBASE(port)->ctrl))
  #define APBBASE_SCALAR_P(port)	(&(APBBASE(port)->scaler))
  
  #define UART_GET_CHAR(port)	(__raw_readl(APBBASE_DATA_P(port)))
  #define UART_PUT_CHAR(port, v)	(__raw_writel(v, APBBASE_DATA_P(port)))
  #define UART_GET_STATUS(port)	(__raw_readl(APBBASE_STATUS_P(port)))
  #define UART_PUT_STATUS(port, v)(__raw_writel(v, APBBASE_STATUS_P(port)))
  #define UART_GET_CTRL(port)	(__raw_readl(APBBASE_CTRL_P(port)))
  #define UART_PUT_CTRL(port, v)	(__raw_writel(v, APBBASE_CTRL_P(port)))
  #define UART_GET_SCAL(port)	(__raw_readl(APBBASE_SCALAR_P(port)))
  #define UART_PUT_SCAL(port, v)	(__raw_writel(v, APBBASE_SCALAR_P(port)))
  
  #define UART_RX_DATA(s)		(((s) & UART_STATUS_DR) != 0)
  #define UART_TX_READY(s)	(((s) & UART_STATUS_THE) != 0)
  
  #endif /* __GRLIB_APBUART_H__ */
  