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
  23         /* uart port features */
  24
  25         unsigned int            has_divslot:1;
  26
  27         /* clock source control */
  28
  29         int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
  30         int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
  31
  32         /* uart controls */
  33         int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
  34 };
  35
  36 struct s3c24xx_uart_port {
  37         unsigned char                   rx_claimed;
  38         unsigned char                   tx_claimed;
  39         unsigned int                    pm_level;
  40         unsigned long                   baudclk_rate;
  41
  42         unsigned int                    rx_irq;
  43         unsigned int                    tx_irq;
  44
  45         struct s3c24xx_uart_info        *info;
  46         struct s3c24xx_uart_clksrc      *clksrc;
  47         struct clk                      *clk;
  48         struct clk                      *baudclk;
  49         struct uart_port                port;
  50
  51 #ifdef CONFIG_CPU_FREQ
  52         struct notifier_block           freq_transition;
  53 #endif
  54 };
  55
  56 /* conversion functions */
  57
  58 #define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
  59 #define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data)
  60
  61 /* register access controls */
  62
  63 #define portaddr(port, reg) ((port)->membase + (reg))
  64
  65 #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
  66 #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
  67
  68 #define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
  69 #define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
  70
  71 extern int s3c24xx_serial_probe(struct platform_device *dev,
  72                                 struct s3c24xx_uart_info *uart);
  73
  74 extern int __devexit s3c24xx_serial_remove(struct platform_device *dev);
  75
  76 extern int s3c24xx_serial_initconsole(struct platform_driver *drv,
  77                                       struct s3c24xx_uart_info **uart);
  78
  79 extern int s3c24xx_serial_init(struct platform_driver *drv,
  80                                struct s3c24xx_uart_info *info);
  81
  82 #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
  83
  84 #define s3c24xx_console_init(__drv, __inf)                              \
  85 static int __init s3c_serial_console_init(void)                         \
  86 {                                                                       \
  87         struct s3c24xx_uart_info *uinfo[CONFIG_SERIAL_SAMSUNG_UARTS];   \
  88         int i;                                                          \
  89                                                                         \
  90         for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)               \
  91                 uinfo[i] = __inf;                                       \
  92         return s3c24xx_serial_initconsole(__drv, uinfo);                \
  93 }                                                                       \
  94                                                                         \
  95 console_initcall(s3c_serial_console_init)
  96
  97 #else
  98 #define s3c24xx_console_init(drv, inf) extern void no_console(void)
  99 #endif
 100
 101 #ifdef CONFIG_SERIAL_SAMSUNG_DEBUG
 102
 103 extern void printascii(const char *);
 104
 105 static void dbg(const char *fmt, ...)
 106 {
 107         va_list va;
 108         char buff[256];
 109
 110         va_start(va, fmt);
 111         vsprintf(buff, fmt, va);
 112         va_end(va);
 113
 114         printascii(buff);
 115 }
 116
 117 #else
 118 #define dbg(x...) do { } while (0)
 119 #endif