Release 4.11 drivers/tty/serial/samsung.h

#ifndef __SAMSUNG_H

#define __SAMSUNG_H

/*
 * 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.
*/

#include <linux/dmaengine.h>


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_dma {
	
unsigned int			rx_chan_id;
	
unsigned int			tx_chan_id;

	
struct dma_slave_config		rx_conf;
	
struct dma_slave_config		tx_conf;

	
struct dma_chan			*rx_chan;
	
struct dma_chan			*tx_chan;

	
dma_addr_t			rx_addr;
	
dma_addr_t			tx_addr;

	
dma_cookie_t			rx_cookie;
	
dma_cookie_t			tx_cookie;

	
char				*rx_buf;

	
dma_addr_t			tx_transfer_addr;

	
size_t				rx_size;
	
size_t				tx_size;

	
struct dma_async_tx_descriptor	*tx_desc;
	
struct dma_async_tx_descriptor	*rx_desc;

	
int				tx_bytes_requested;
	
int				rx_bytes_requested;
};


struct s3c24xx_uart_port {
	
unsigned char			rx_claimed;
	
unsigned char			tx_claimed;
	
unsigned int			pm_level;
	
unsigned long			baudclk_rate;
	
unsigned int			min_dma_size;

	
unsigned int			rx_irq;
	
unsigned int			tx_irq;

	
unsigned int			tx_in_progress;
	
unsigned int			tx_mode;
	
unsigned int			rx_mode;

	
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;

	
struct s3c24xx_uart_dma		*dma;

#ifdef CONFIG_ARM_S3C24XX_CPUFREQ
	
struct notifier_block		freq_transition;
#endif
};

/* conversion functions */


#define s3c24xx_dev_to_port(__dev) dev_get_drvdata(__dev)

/* register access controls */


#define portaddr(port, reg) ((port)->membase + (reg))

#define portaddrl(port, reg) \
	((unsigned long *)(unsigned long)((port)->membase + (reg)))


#define rd_regb(port, reg) (readb_relaxed(portaddr(port, reg)))

#define rd_regl(port, reg) (readl_relaxed(portaddr(port, reg)))


#define wr_regb(port, reg, val) writeb_relaxed(val, portaddr(port, reg))

#define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg))

/* Byte-order aware bit setting/clearing functions. */



static inline void s3c24xx_set_bit(struct uart_port *port, int idx,
				   unsigned int reg)
{
	unsigned long flags;
	u32 val;

	local_irq_save(flags);
	val = rd_regl(port, reg);
	val |= (1 << idx);
	wr_regl(port, reg, val);
	local_irq_restore(flags);
}

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static inline void s3c24xx_clear_bit(struct uart_port *port, int idx,
				     unsigned int reg)
{
	unsigned long flags;
	u32 val;

	local_irq_save(flags);
	val = rd_regl(port, reg);
	val &= ~(1 << idx);
	wr_regl(port, reg, val);
	local_irq_restore(flags);
}

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#endif
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Robert Baldyga
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3
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Thomas Abraham
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4
21.05%
Joe Perches
6
1.28%
1
5.26%
Marek Szyprowski
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5.26%
Jingoo Han
3
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Jovi Zhang
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Directory: drivers/tty/serial

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