forked from Minki/linux
84f57d9e36
There are a few bugs in the samsung serial driver when built as a loadable module, which makes the console code unavailable, as well as giving no access to the 'printascii' early debug function. This adds the appropriate compile time conditionals. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
|
|
* Driver for Samsung SoC onboard UARTs.
|
|
*
|
|
* Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
|
|
* http://armlinux.simtec.co.uk/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
struct s3c24xx_uart_info {
|
|
char *name;
|
|
unsigned int type;
|
|
unsigned int fifosize;
|
|
unsigned long rx_fifomask;
|
|
unsigned long rx_fifoshift;
|
|
unsigned long rx_fifofull;
|
|
unsigned long tx_fifomask;
|
|
unsigned long tx_fifoshift;
|
|
unsigned long tx_fifofull;
|
|
unsigned int def_clk_sel;
|
|
unsigned long num_clks;
|
|
unsigned long clksel_mask;
|
|
unsigned long clksel_shift;
|
|
|
|
/* uart port features */
|
|
|
|
unsigned int has_divslot:1;
|
|
|
|
/* uart controls */
|
|
int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
|
|
};
|
|
|
|
struct s3c24xx_serial_drv_data {
|
|
struct s3c24xx_uart_info *info;
|
|
struct s3c2410_uartcfg *def_cfg;
|
|
unsigned int fifosize[CONFIG_SERIAL_SAMSUNG_UARTS];
|
|
};
|
|
|
|
struct s3c24xx_uart_port {
|
|
unsigned char rx_claimed;
|
|
unsigned char tx_claimed;
|
|
unsigned int pm_level;
|
|
unsigned long baudclk_rate;
|
|
|
|
unsigned int rx_irq;
|
|
unsigned int tx_irq;
|
|
|
|
struct s3c24xx_uart_info *info;
|
|
struct clk *clk;
|
|
struct clk *baudclk;
|
|
struct uart_port port;
|
|
struct s3c24xx_serial_drv_data *drv_data;
|
|
|
|
/* reference to platform data */
|
|
struct s3c2410_uartcfg *cfg;
|
|
|
|
#ifdef CONFIG_CPU_FREQ
|
|
struct notifier_block freq_transition;
|
|
#endif
|
|
};
|
|
|
|
/* conversion functions */
|
|
|
|
#define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
|
|
|
|
/* register access controls */
|
|
|
|
#define portaddr(port, reg) ((port)->membase + (reg))
|
|
#define portaddrl(port, reg) ((unsigned long *)((port)->membase + (reg)))
|
|
|
|
#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
|
|
#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
|
|
|
|
#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
|
|
#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
|
|
|
|
#if defined(CONFIG_SERIAL_SAMSUNG_DEBUG) && \
|
|
defined(CONFIG_DEBUG_LL) && \
|
|
!defined(MODULE)
|
|
|
|
extern void printascii(const char *);
|
|
|
|
static void dbg(const char *fmt, ...)
|
|
{
|
|
va_list va;
|
|
char buff[256];
|
|
|
|
va_start(va, fmt);
|
|
vsprintf(buff, fmt, va);
|
|
va_end(va);
|
|
|
|
printascii(buff);
|
|
}
|
|
|
|
#else
|
|
#define dbg(x...) do { } while (0)
|
|
#endif
|