1 /* linux/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h 2 * 3 * Copyright (C) 2009 Samsung Electronics Ltd. 4 * Jaswinder Singh <jassi.brar@samsung.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifndef __S3C64XX_PLAT_SPI_H 12 #define __S3C64XX_PLAT_SPI_H 13 14 #include <linux/dmaengine.h> 15 16 struct platform_device; 17 18 /** 19 * struct s3c64xx_spi_csinfo - ChipSelect description 20 * @fb_delay: Slave specific feedback delay. 21 * Refer to FB_CLK_SEL register definition in SPI chapter. 22 * @line: Custom 'identity' of the CS line. 23 * 24 * This is per SPI-Slave Chipselect information. 25 * Allocate and initialize one in machine init code and make the 26 * spi_board_info.controller_data point to it. 27 */ 28 struct s3c64xx_spi_csinfo { 29 u8 fb_delay; 30 unsigned line; 31 }; 32 33 /** 34 * struct s3c64xx_spi_info - SPI Controller defining structure 35 * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field. 36 * @num_cs: Number of CS this controller emulates. 37 * @cfg_gpio: Configure pins for this SPI controller. 38 */ 39 struct s3c64xx_spi_info { 40 int src_clk_nr; 41 int num_cs; 42 int (*cfg_gpio)(void); 43 dma_filter_fn filter; 44 }; 45 46 /** 47 * s3c64xx_spi_set_platdata - SPI Controller configure callback by the board 48 * initialization code. 49 * @cfg_gpio: Pointer to gpio setup function. 50 * @src_clk_nr: Clock the SPI controller is to use to generate SPI clocks. 51 * @num_cs: Number of elements in the 'cs' array. 52 * 53 * Call this from machine init code for each SPI Controller that 54 * has some chips attached to it. 55 */ 56 extern void s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 57 int num_cs); 58 extern void s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 59 int num_cs); 60 extern void s3c64xx_spi2_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 61 int num_cs); 62 63 /* defined by architecture to configure gpio */ 64 extern int s3c64xx_spi0_cfg_gpio(void); 65 extern int s3c64xx_spi1_cfg_gpio(void); 66 extern int s3c64xx_spi2_cfg_gpio(void); 67 68 extern struct s3c64xx_spi_info s3c64xx_spi0_pdata; 69 extern struct s3c64xx_spi_info s3c64xx_spi1_pdata; 70 extern struct s3c64xx_spi_info s3c64xx_spi2_pdata; 71 #endif /* __S3C64XX_PLAT_SPI_H */ 72