1/*
2 * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14#ifndef __linux_pxa2xx_spi_h
15#define __linux_pxa2xx_spi_h
16
17#include <linux/pxa2xx_ssp.h>
18
19#define PXA2XX_CS_ASSERT (0x01)
20#define PXA2XX_CS_DEASSERT (0x02)
21
22struct dma_chan;
23
24/* device.platform_data for SSP controller devices */
25struct pxa2xx_spi_controller {
26 u16 num_chipselect;
27 u8 enable_dma;
28 bool is_slave;
29
30 /* DMA engine specific config */
31 bool (*dma_filter)(struct dma_chan *chan, void *param);
32 void *tx_param;
33 void *rx_param;
34
35 /* For non-PXA arches */
36 struct ssp_device ssp;
37};
38
39/* spi_board_info.controller_data for SPI slave devices,
40 * copied to spi_device.platform_data ... mostly for dma tuning
41 */
42struct pxa2xx_spi_chip {
43 u8 tx_threshold;
44 u8 tx_hi_threshold;
45 u8 rx_threshold;
46 u8 dma_burst_size;
47 u32 timeout;
48 u8 enable_loopback;
49 int gpio_cs;
50 void (*cs_control)(u32 command);
51};
52
53#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
54
55#include <linux/clk.h>
56
57extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info);
58
59#endif
60#endif
61