1/*
2 * include/asm-arm/arch-imx/spi_imx.h
3 *
4 * Copyright (C) 2006 SWAPP
5 *	Andrea Paterniani <a.paterniani@swapp-eng.it>
6 *
7 * Initial version inspired by:
8 *	linux-2.6.17-rc3-mm1/include/asm-arm/arch-pxa/pxa2xx_spi.h
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 */
24
25#ifndef SPI_IMX_H_
26#define SPI_IMX_H_
27
28
29/*-------------------------------------------------------------------------*/
30/**
31 * struct spi_imx_master - device.platform_data for SPI controller devices.
32 * @num_chipselect: chipselects are used to distinguish individual
33 *	SPI slaves, and are numbered from zero to num_chipselects - 1.
34 *	each slave has a chipselect signal, but it's common that not
35 *	every chipselect is connected to a slave.
36 * @enable_dma: if true enables DMA driven transfers.
37*/
38struct spi_imx_master {
39	u8 num_chipselect;
40	u8 enable_dma:1;
41};
42/*-------------------------------------------------------------------------*/
43
44
45/*-------------------------------------------------------------------------*/
46/**
47 * struct spi_imx_chip - spi_board_info.controller_data for SPI
48 * slave devices, copied to spi_device.controller_data.
49 * @enable_loopback : used for test purpouse to internally connect RX and TX
50 *	sections.
51 * @enable_dma : enables dma transfer (provided that controller driver has
52 *	dma enabled too).
53 * @ins_ss_pulse : enable /SS pulse insertion between SPI burst.
54 * @bclk_wait : number of bclk waits between each bits_per_word SPI burst.
55 * @cs_control : function pointer to board-specific function to assert/deassert
56 *	I/O port to control HW generation of devices chip-select.
57*/
58struct spi_imx_chip {
59	u8	enable_loopback:1;
60	u8	enable_dma:1;
61	u8	ins_ss_pulse:1;
62	u16	bclk_wait:15;
63	void (*cs_control)(u32 control);
64};
65
66/* Chip-select state */
67#define SPI_CS_ASSERT			(1 << 0)
68#define SPI_CS_DEASSERT			(1 << 1)
69/*-------------------------------------------------------------------------*/
70
71
72#endif /* SPI_IMX_H_*/
73