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   1 /* linux/drivers/serial/samsung.h
   2  *
   3  * Driver for Samsung SoC onboard UARTs.
   4  *
   5  * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 struct s3c24xx_uart_info {
  14         char                    *name;
  15         unsigned int            type;
  16         unsigned int            fifosize;
  17         unsigned long           rx_fifomask;
  18         unsigned long           rx_fifoshift;
  19         unsigned long           rx_fifofull;
  20         unsigned long           tx_fifomask;
  21         unsigned long           tx_fifoshift;
  22         unsigned long           tx_fifofull;
  23
  24         /* clock source control */
  25
  26         int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
  27         int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
  28
  29         /* uart controls */
  30         int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
  31 };
  32
  33 struct s3c24xx_uart_port {
  34         unsigned char                   rx_claimed;
  35         unsigned char                   tx_claimed;
  36         unsigned int                    pm_level;
  37         unsigned long                   baudclk_rate;
  38
  39         struct s3c24xx_uart_info        *info;
  40         struct s3c24xx_uart_clksrc      *clksrc;
  41         struct clk                      *clk;
  42         struct clk                      *baudclk;
  43         struct uart_port                port;
  44
  45 #ifdef CONFIG_CPU_FREQ
  46         struct notifier_block           freq_transition;
  47 #endif
  48 };
  49
  50 /* conversion functions */
  51
  52 #define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
  53 #define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data)
  54
  55 /* register access controls */
  56
  57 #define portaddr(port, reg) ((port)->membase + (reg))
  58
  59 #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
  60 #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
  61
  62 #define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
  63 #define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
  64
  65 extern int s3c24xx_serial_probe(struct platform_device *dev,
  66                                 struct s3c24xx_uart_info *uart);
  67
  68 extern int s3c24xx_serial_remove(struct platform_device *dev);
  69
  70 extern int s3c24xx_serial_initconsole(struct platform_driver *drv,
  71                                       struct s3c24xx_uart_info *uart);
  72
  73 extern int s3c24xx_serial_init(struct platform_driver *drv,
  74                                struct s3c24xx_uart_info *info);
  75
  76 #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
  77
  78 #define s3c24xx_console_init(__drv, __inf)                      \
  79 static int __init s3c_serial_console_init(void)                 \
  80 {                                                               \
  81         return s3c24xx_serial_initconsole(__drv, __inf);        \
  82 }                                                               \
  83                                                                 \
  84 console_initcall(s3c_serial_console_init)
  85
  86 #else
  87 #define s3c24xx_console_init(drv, inf) extern void no_console(void)
  88 #endif
  89
  90 #ifdef CONFIG_SERIAL_SAMSUNG_DEBUG
  91
  92 extern void printascii(const char *);
  93
  94 static void dbg(const char *fmt, ...)
  95 {
  96         va_list va;
  97         char buff[256];
  98
  99         va_start(va, fmt);
 100         vsprintf(buff, fmt, va);
 101         va_end(va);
 102
 103         printascii(buff);
 104 }
 105
 106 #else
 107 #define dbg(x...) do { } while (0)
 108 #endif