drivers/tty/serial/samsung.h

   1 /* linux/drivers/serial/samsung.h
   2  *
   3  * Driver for Samsung SoC onboard UARTs.
   4  *
   5  * Ben Dooks, Copyright (c) 2003-2008 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         /* uart port features */
  25
  26         unsigned int            has_divslot:1;
  27
  28         /* clock source control */
  29
  30         int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
  31         int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
  32
  33         /* uart controls */
  34         int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
  35 };
  36
  37 struct s3c24xx_uart_port {
  38         unsigned char                   rx_claimed;
  39         unsigned char                   tx_claimed;
  40         unsigned int                    pm_level;
  41         unsigned long                   baudclk_rate;
  42
  43         unsigned int                    rx_irq;
  44         unsigned int                    tx_irq;
  45
  46         struct s3c24xx_uart_info        *info;
  47         struct s3c24xx_uart_clksrc      *clksrc;
  48         struct clk                      *clk;
  49         struct clk                      *baudclk;
  50         struct uart_port                port;
  51
  52 #ifdef CONFIG_CPU_FREQ
  53         struct notifier_block           freq_transition;
  54 #endif
  55 };
  56
  57 /* conversion functions */
  58
  59 #define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
  60 #define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data)
  61
  62 /* register access controls */
  63
  64 #define portaddr(port, reg) ((port)->membase + (reg))
  65
  66 #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
  67 #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
  68
  69 #define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
  70 #define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
  71
  72 extern int s3c24xx_serial_probe(struct platform_device *dev,
  73                                 struct s3c24xx_uart_info *uart);
  74
  75 extern int __devexit s3c24xx_serial_remove(struct platform_device *dev);
  76
  77 extern int s3c24xx_serial_initconsole(struct platform_driver *drv,
  78                                       struct s3c24xx_uart_info **uart);
  79
  80 extern int s3c24xx_serial_init(struct platform_driver *drv,
  81                                struct s3c24xx_uart_info *info);
  82
  83 #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
  84
  85 #define s3c24xx_console_init(__drv, __inf)                              \
  86 static int __init s3c_serial_console_init(void)                         \
  87 {                                                                       \
  88         struct s3c24xx_uart_info *uinfo[CONFIG_SERIAL_SAMSUNG_UARTS];   \
  89         int i;                                                          \
  90                                                                         \
  91         for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)               \
  92                 uinfo[i] = __inf;                                       \
  93         return s3c24xx_serial_initconsole(__drv, uinfo);                \
  94 }                                                                       \
  95                                                                         \
  96 console_initcall(s3c_serial_console_init)
  97
  98 #else
  99 #define s3c24xx_console_init(drv, inf) extern void no_console(void)
 100 #endif
 101
 102 #ifdef CONFIG_SERIAL_SAMSUNG_DEBUG
 103
 104 extern void printascii(const char *);
 105
 106 static void dbg(const char *fmt, ...)
 107 {
 108         va_list va;
 109         char buff[256];
 110
 111         va_start(va, fmt);
 112         vsprintf(buff, fmt, va);
 113         va_end(va);
 114
 115         printascii(buff);
 116 }
 117
 118 #else
 119 #define dbg(x...) do { } while (0)
 120 #endif