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-rw-r--r--include/asm-arm/arch-pxa/pxa2xx_spi.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/include/asm-arm/arch-pxa/pxa2xx_spi.h b/include/asm-arm/arch-pxa/pxa2xx_spi.h
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+++ b/include/asm-arm/arch-pxa/pxa2xx_spi.h
@@ -0,0 +1,71 @@
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#define SSP_TIMEOUT_SCALE (2712)
31#elif defined(CONFIG_PXA27x)
32#define CLOCK_SPEED_HZ 13000000
33#define SSP1_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
34#define SSP2_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
35#define SSP3_SerClkDiv(x) (((CLOCK_SPEED_HZ/(x+1))<<8)&0x000fff00)
36#define SSP_TIMEOUT_SCALE (769)
37#endif
38
39#define SSP_TIMEOUT(x) ((x*10000)/SSP_TIMEOUT_SCALE)
40#define SSP1_VIRT ((void *)(io_p2v(__PREG(SSCR0_P(1)))))
41#define SSP2_VIRT ((void *)(io_p2v(__PREG(SSCR0_P(2)))))
42#define SSP3_VIRT ((void *)(io_p2v(__PREG(SSCR0_P(3)))))
43
44enum pxa_ssp_type {
45 SSP_UNDEFINED = 0,
46 PXA25x_SSP, /* pxa 210, 250, 255, 26x */
47 PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
48 PXA27x_SSP,
49};
50
51/* device.platform_data for SSP controller devices */
52struct pxa2xx_spi_master {
53 enum pxa_ssp_type ssp_type;
54 u32 clock_enable;
55 u16 num_chipselect;
56 u8 enable_dma;
57};
58
59/* spi_board_info.controller_data for SPI slave devices,
60 * copied to spi_device.platform_data ... mostly for dma tuning
61 */
62struct pxa2xx_spi_chip {
63 u8 tx_threshold;
64 u8 rx_threshold;
65 u8 dma_burst_size;
66 u32 timeout_microsecs;
67 u8 enable_loopback;
68 void (*cs_control)(u32 command);
69};
70
71#endif /*PXA2XX_SPI_H_*/