[mirror_ubuntu-artful-kernel.git] / arch / arm / plat-omap / include / plat / omap-serial.h

/*
 * Driver for OMAP-UART controller.
 * Based on drivers/serial/8250.c
 *
 * Copyright (C) 2010 Texas Instruments.
 *
 * Authors:
 *	Govindraj R	<govindraj.raja@ti.com>
 *	Thara Gopinath	<thara@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef __OMAP_SERIAL_H__
#define __OMAP_SERIAL_H__

#include <linux/serial_core.h>
#include <linux/platform_device.h>

#include <plat/mux.h>

#define DRIVER_NAME	"omap_uart"

/*
 * Use tty device name as ttyO, [O -> OMAP]
 * in bootargs we specify as console=ttyO0 if uart1
 * is used as console uart.
 */
#define OMAP_SERIAL_NAME	"ttyO"

#define OMAP_MODE13X_SPEED	230400

#define OMAP_UART_SCR_TX_EMPTY	0x08

/* WER = 0x7F
 * Enable module level wakeup in WER reg
 */
#define OMAP_UART_WER_MOD_WKUP	0X7F

/* Enable XON/XOFF flow control on output */
#define OMAP_UART_SW_TX		0x04

/* Enable XON/XOFF flow control on input */
#define OMAP_UART_SW_RX		0x04

#define OMAP_UART_SYSC_RESET	0X07
#define OMAP_UART_TCR_TRIG	0X0F
#define OMAP_UART_SW_CLR	0XF0
#define OMAP_UART_FIFO_CLR	0X06

#define OMAP_UART_DMA_CH_FREE	-1

#define RX_TIMEOUT		(3 * HZ)
#define OMAP_MAX_HSUART_PORTS	4

#define MSR_SAVE_FLAGS		UART_MSR_ANY_DELTA

#define UART_ERRATA_i202_MDR1_ACCESS	BIT(0)
#define UART_ERRATA_i291_DMA_FORCEIDLE	BIT(1)

struct omap_uart_port_info {
	bool			dma_enabled;	/* To specify DMA Mode */
	unsigned int		uartclk;	/* UART clock rate */
	upf_t			flags;		/* UPF_* flags */
	u32			errata;

	int (*get_context_loss_count)(struct device *);
	void (*set_forceidle)(struct platform_device *);
	void (*set_noidle)(struct platform_device *);
	void (*enable_wakeup)(struct platform_device *, bool);
};

struct uart_omap_dma {
	u8			uart_dma_tx;
	u8			uart_dma_rx;
	int			rx_dma_channel;
	int			tx_dma_channel;
	dma_addr_t		rx_buf_dma_phys;
	dma_addr_t		tx_buf_dma_phys;
	unsigned int		uart_base;
	/*
	 * Buffer for rx dma.It is not required for tx because the buffer
	 * comes from port structure.
	 */
	unsigned char		*rx_buf;
	unsigned int		prev_rx_dma_pos;
	int			tx_buf_size;
	int			tx_dma_used;
	int			rx_dma_used;
	spinlock_t		tx_lock;
	spinlock_t		rx_lock;
	/* timer to poll activity on rx dma */
	struct timer_list	rx_timer;
	int			rx_buf_size;
	int			rx_timeout;
};

struct uart_omap_port {
	struct uart_port	port;
	struct uart_omap_dma	uart_dma;
	struct platform_device	*pdev;

	unsigned char		ier;
	unsigned char		lcr;
	unsigned char		mcr;
	unsigned char		fcr;
	unsigned char		efr;
	unsigned char		dll;
	unsigned char		dlh;
	unsigned char		mdr1;
	unsigned char		scr;

	int			use_dma;
	/*
	 * Some bits in registers are cleared on a read, so they must
	 * be saved whenever the register is read but the bits will not
	 * be immediately processed.
	 */
	unsigned int		lsr_break_flag;
	unsigned char		msr_saved_flags;
	char			name[20];
	unsigned long		port_activity;
	u32			context_loss_cnt;
	u32			errata;
	u8			wakeups_enabled;
};

#endif /* __OMAP_SERIAL_H__ */
Commit	Line	Data
b612633b G	1	/*
	2	* Driver for OMAP-UART controller.
	3	* Based on drivers/serial/8250.c
	4	*
	5	* Copyright (C) 2010 Texas Instruments.
	6	*
	7	* Authors:
	8	* Govindraj R <govindraj.raja@ti.com>
	9	* Thara Gopinath <thara@ti.com>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*/
	16
	17	#ifndef __OMAP_SERIAL_H__
	18	#define __OMAP_SERIAL_H__
	19
	20	#include <linux/serial_core.h>
	21	#include <linux/platform_device.h>
	22
b612633b G	23	#include <plat/mux.h>
b612633b G	24
374b8cfd	25	#define DRIVER_NAME "omap_uart"
b612633b G	26
	27	/*
	28	* Use tty device name as ttyO, [O -> OMAP]
	29	* in bootargs we specify as console=ttyO0 if uart1
	30	* is used as console uart.
	31	*/
	32	#define OMAP_SERIAL_NAME "ttyO"
	33
b612633b G	34	#define OMAP_MODE13X_SPEED 230400
b612633b G	35
32212897 G	36	#define OMAP_UART_SCR_TX_EMPTY 0x08
32212897 G	37
b612633b G	38	/* WER = 0x7F
	39	* Enable module level wakeup in WER reg
	40	*/
	41	#define OMAP_UART_WER_MOD_WKUP 0X7F
	42
	43	/* Enable XON/XOFF flow control on output */
	44	#define OMAP_UART_SW_TX 0x04
	45
	46	/* Enable XON/XOFF flow control on input */
	47	#define OMAP_UART_SW_RX 0x04
	48
	49	#define OMAP_UART_SYSC_RESET 0X07
	50	#define OMAP_UART_TCR_TRIG 0X0F
	51	#define OMAP_UART_SW_CLR 0XF0
	52	#define OMAP_UART_FIFO_CLR 0X06
	53
	54	#define OMAP_UART_DMA_CH_FREE -1
	55
	56	#define RX_TIMEOUT (3 * HZ)
	57	#define OMAP_MAX_HSUART_PORTS 4
	58
	59	#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
	60
94734749 G	61	#define UART_ERRATA_i202_MDR1_ACCESS BIT(0)
	62	#define UART_ERRATA_i291_DMA_FORCEIDLE BIT(1)
	63
b612633b G	64	struct omap_uart_port_info {
	65	bool dma_enabled; /* To specify DMA Mode */
	66	unsigned int uartclk; /* UART clock rate */
b612633b	67	upf_t flags; /* UPF_* flags */
94734749	68	u32 errata;
ec3bebc6 G	69
ec3bebc6 G	70	int (get_context_loss_count)(struct device );
94734749 G	71	void (set_forceidle)(struct platform_device );
94734749 G	72	void (set_noidle)(struct platform_device );
62f3ec5f	73	void (enable_wakeup)(struct platform_device , bool);
b612633b G	74	};
	75
	76	struct uart_omap_dma {
	77	u8 uart_dma_tx;
	78	u8 uart_dma_rx;
	79	int rx_dma_channel;
	80	int tx_dma_channel;
	81	dma_addr_t rx_buf_dma_phys;
	82	dma_addr_t tx_buf_dma_phys;
	83	unsigned int uart_base;
	84	/*
	85	* Buffer for rx dma.It is not required for tx because the buffer
	86	* comes from port structure.
	87	*/
	88	unsigned char *rx_buf;
	89	unsigned int prev_rx_dma_pos;
	90	int tx_buf_size;
	91	int tx_dma_used;
	92	int rx_dma_used;
	93	spinlock_t tx_lock;
	94	spinlock_t rx_lock;
	95	/* timer to poll activity on rx dma */
	96	struct timer_list rx_timer;
	97	int rx_buf_size;
	98	int rx_timeout;
	99	};
	100
	101	struct uart_omap_port {
	102	struct uart_port port;
	103	struct uart_omap_dma uart_dma;
	104	struct platform_device *pdev;
	105
	106	unsigned char ier;
	107	unsigned char lcr;
	108	unsigned char mcr;
	109	unsigned char fcr;
	110	unsigned char efr;
c538d20c G	111	unsigned char dll;
	112	unsigned char dlh;
	113	unsigned char mdr1;
	114	unsigned char scr;
b612633b G	115
	116	int use_dma;
	117	/*
	118	* Some bits in registers are cleared on a read, so they must
	119	* be saved whenever the register is read but the bits will not
	120	* be immediately processed.
	121	*/
	122	unsigned int lsr_break_flag;
	123	unsigned char msr_saved_flags;
	124	char name[20];
	125	unsigned long port_activity;
ec3bebc6	126	u32 context_loss_cnt;
94734749	127	u32 errata;
62f3ec5f	128	u8 wakeups_enabled;
b612633b G	129	};
	130
	131	#endif /* __OMAP_SERIAL_H__ */