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
19#ifndef PXA2XX_SPI_H_
20#define PXA2XX_SPI_H_
21
22#define PXA2XX_CS_ASSERT (0x01)
23#define PXA2XX_CS_DEASSERT (0x02)
24
25#if defined(CONFIG_PXA25x)
26#define CLOCK_SPEED_HZ 3686400
27#define SSP1_SerClkDiv(x) (((CLOCK_SPEED_HZ/2/(x+1))<<8)&0x0000ff00)
28#define SSP2_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
29#define SSP3_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
30#elif defined(CONFIG_PXA27x)
31#define CLOCK_SPEED_HZ 13000000
32#define SSP1_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
33#define SSP2_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
34#define SSP3_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
35#endif
36
37#define SSP1_VIRT ((void *)(io_p2v(__PREG(SSCR0_P(1)))))
38#define SSP2_VIRT ((void *)(io_p2v(__PREG(SSCR0_P(2)))))
39#define SSP3_VIRT ((void *)(io_p2v(__PREG(SSCR0_P(3)))))
40
41enum pxa_ssp_type {
42	SSP_UNDEFINED = 0,
43	PXA25x_SSP,  /* pxa 210, 250, 255, 26x */
44	PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
45	PXA27x_SSP,
46};
47
48/* device.platform_data for SSP controller devices */
49struct pxa2xx_spi_master {
50	enum pxa_ssp_type ssp_type;
51	u32 clock_enable;
52	u16 num_chipselect;
53	u8 enable_dma;
54};
55
56/* spi_board_info.controller_data for SPI slave devices,
57 * copied to spi_device.platform_data ... mostly for dma tuning
58 */
59struct pxa2xx_spi_chip {
60	u8 tx_threshold;
61	u8 rx_threshold;
62	u8 dma_burst_size;
63	u32 timeout;
64	u8 enable_loopback;
65	void (*cs_control)(u32 command);
66};
67
68#endif /*PXA2XX_SPI_H_*/
69