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) dev_get_drvdata(__dev)
 67
 68/* register access controls */
 69
 70#define portaddr(port, reg) ((port)->membase + (reg))
 71#define portaddrl(port, reg) \
 72	((unsigned long *)(unsigned long)((port)->membase + (reg)))
 73
 74#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
 75#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
 76
 77#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
 78#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
 79
 80#if defined(CONFIG_SERIAL_SAMSUNG_DEBUG) && \
 81    defined(CONFIG_DEBUG_LL) && \
 82    !defined(MODULE)
 83
 84extern void printascii(const char *);
 85
 86static void dbg(const char *fmt, ...)
 87{
 88	va_list va;
 89	char buff[256];
 90
 91	va_start(va, fmt);
 92	vsprintf(buff, fmt, va);
 93	va_end(va);
 94
 95	printascii(buff);
 96}
 97
 98#else
 99#define dbg(x...) do { } while (0)
100#endif