1/*
2 * Copyright (C) 2009 Samsung Electronics Ltd.
3 *	Jaswinder Singh <jassi.brar@samsung.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#ifndef __SPI_S3C64XX_H
11#define __SPI_S3C64XX_H
12
13#include <linux/dmaengine.h>
14
15struct platform_device;
16
17/**
18 * struct s3c64xx_spi_csinfo - ChipSelect description
19 * @fb_delay: Slave specific feedback delay.
20 *            Refer to FB_CLK_SEL register definition in SPI chapter.
21 * @line: Custom 'identity' of the CS line.
22 *
23 * This is per SPI-Slave Chipselect information.
24 * Allocate and initialize one in machine init code and make the
25 * spi_board_info.controller_data point to it.
26 */
27struct s3c64xx_spi_csinfo {
28	u8 fb_delay;
29	unsigned line;
30};
31
32/**
33 * struct s3c64xx_spi_info - SPI Controller defining structure
34 * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field.
35 * @num_cs: Number of CS this controller emulates.
36 * @cfg_gpio: Configure pins for this SPI controller.
37 */
38struct s3c64xx_spi_info {
39	int src_clk_nr;
40	int num_cs;
41	int (*cfg_gpio)(void);
42	dma_filter_fn filter;
43};
44
45/**
46 * s3c64xx_spi_set_platdata - SPI Controller configure callback by the board
47 *				initialization code.
48 * @cfg_gpio: Pointer to gpio setup function.
49 * @src_clk_nr: Clock the SPI controller is to use to generate SPI clocks.
50 * @num_cs: Number of elements in the 'cs' array.
51 *
52 * Call this from machine init code for each SPI Controller that
53 * has some chips attached to it.
54 */
55extern void s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
56						int num_cs);
57extern void s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
58						int num_cs);
59extern void s3c64xx_spi2_set_platdata(int (*cfg_gpio)(void), int src_clk_nr,
60						int num_cs);
61
62/* defined by architecture to configure gpio */
63extern int s3c64xx_spi0_cfg_gpio(void);
64extern int s3c64xx_spi1_cfg_gpio(void);
65extern int s3c64xx_spi2_cfg_gpio(void);
66
67extern struct s3c64xx_spi_info s3c64xx_spi0_pdata;
68extern struct s3c64xx_spi_info s3c64xx_spi1_pdata;
69extern struct s3c64xx_spi_info s3c64xx_spi2_pdata;
70#endif /*__SPI_S3C64XX_H */
71