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
26/* device.platform_data for SSP controller devices */
27struct pxa2xx_spi_master {
28 u32 clock_enable;
29 u16 num_chipselect;
30 u8 enable_dma;
31
32 /* DMA engine specific config */
33 int rx_chan_id;
34 int tx_chan_id;
35 int rx_slave_id;
36 int tx_slave_id;
37
38 /* For non-PXA arches */
39 struct ssp_device ssp;
40};
41
42/* spi_board_info.controller_data for SPI slave devices,
43 * copied to spi_device.platform_data ... mostly for dma tuning
44 */
45struct pxa2xx_spi_chip {
46 u8 tx_threshold;
47 u8 tx_hi_threshold;
48 u8 rx_threshold;
49 u8 dma_burst_size;
50 u32 timeout;
51 u8 enable_loopback;
52 int gpio_cs;
53 void (*cs_control)(u32 command);
54};
55
56#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
57
58#include <linux/clk.h>
59#include <mach/dma.h>
60
61extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
62
63#endif
64#endif