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