drivers/tty/serial/samsung.h

   1 /*
   2  * Driver for Samsung SoC onboard UARTs.
   3  *
   4  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
   5  *      http://armlinux.simtec.co.uk/
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 struct s3c24xx_uart_info {
  13         char                    *name;
  14         unsigned int            type;
  15         unsigned int            fifosize;
  16         unsigned long           rx_fifomask;
  17         unsigned long           rx_fifoshift;
  18         unsigned long           rx_fifofull;
  19         unsigned long           tx_fifomask;
  20         unsigned long           tx_fifoshift;
  21         unsigned long           tx_fifofull;
  22         unsigned int            def_clk_sel;
  23         unsigned long           num_clks;
  24         unsigned long           clksel_mask;
  25         unsigned long           clksel_shift;
  26
  27         /* uart port features */
  28
  29         unsigned int            has_divslot:1;
  30
  31         /* uart controls */
  32         int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
  33 };
  34
  35 struct s3c24xx_serial_drv_data {
  36         struct s3c24xx_uart_info        *info;
  37         struct s3c2410_uartcfg          *def_cfg;
  38         unsigned int                    fifosize[CONFIG_SERIAL_SAMSUNG_UARTS];
  39 };
  40
  41 struct s3c24xx_uart_port {
  42         unsigned char                   rx_claimed;
  43         unsigned char                   tx_claimed;
  44         unsigned int                    pm_level;
  45         unsigned long                   baudclk_rate;
  46
  47         unsigned int                    rx_irq;
  48         unsigned int                    tx_irq;
  49
  50         struct s3c24xx_uart_info        *info;
  51         struct clk                      *clk;
  52         struct clk                      *baudclk;
  53         struct uart_port                port;
  54         struct s3c24xx_serial_drv_data  *drv_data;
  55
  56         /* reference to platform data */
  57         struct s3c2410_uartcfg          *cfg;
  58
  59 #ifdef CONFIG_CPU_FREQ
  60         struct notifier_block           freq_transition;
  61 #endif
  62 };
  63
  64 /* conversion functions */
  65
  66 #define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
  67
  68 /* register access controls */
  69
  70 #define portaddr(port, reg) ((port)->membase + (reg))
  71 #define portaddrl(port, reg) ((unsigned long *)((port)->membase + (reg)))
  72
  73 #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
  74 #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
  75
  76 #define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
  77 #define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
  78
  79 #ifdef CONFIG_SERIAL_SAMSUNG_DEBUG
  80
  81 extern void printascii(const char *);
  82
  83 static void dbg(const char *fmt, ...)
  84 {
  85         va_list va;
  86         char buff[256];
  87
  88         va_start(va, fmt);
  89         vsprintf(buff, fmt, va);
  90         va_end(va);
  91
  92         printascii(buff);
  93 }
  94
  95 #else
  96 #define dbg(x...) do { } while (0)
  97 #endif