Root/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
12struct 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
35struct 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
41struct 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
81extern void printascii(const char *);
82
83static 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
98

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