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