tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18#ifndef __linux_pxa2xx_spi_h
19#define __linux_pxa2xx_spi_h
20
21#include <linux/pxa2xx_ssp.h>
22
23#define PXA2XX_CS_ASSERT (0x01)
24#define PXA2XX_CS_DEASSERT (0x02)
25
26struct dma_chan;
27
28/* device.platform_data for SSP controller devices */
29struct pxa2xx_spi_master {
30 u32 clock_enable;
31 u16 num_chipselect;
32 u8 enable_dma;
33
34 /* DMA engine specific config */
35 bool (*dma_filter)(struct dma_chan *chan, void *param);
36 void *tx_param;
37 void *rx_param;
38
39 /* For non-PXA arches */
40 struct ssp_device ssp;
41};
42
43/* spi_board_info.controller_data for SPI slave devices,
44 * copied to spi_device.platform_data ... mostly for dma tuning
45 */
46struct pxa2xx_spi_chip {
47 u8 tx_threshold;
48 u8 tx_hi_threshold;
49 u8 rx_threshold;
50 u8 dma_burst_size;
51 u32 timeout;
52 u8 enable_loopback;
53 int gpio_cs;
54 void (*cs_control)(u32 command);
55};
56
57#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
58
59#include <linux/clk.h>
60#include <mach/dma.h>
61
62extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
63
64#endif
65#endif