| Stephen Street | e0c9905 | 2006-03-07 23:53:24 -0800 | [diff] [blame] | 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) |
| Stephen Street | 5daa3ba | 2006-05-20 15:00:19 -0700 | [diff] [blame] | 30 | #define SSP_TIMEOUT_SCALE (2712) |
| Stephen Street | e0c9905 | 2006-03-07 23:53:24 -0800 | [diff] [blame] | 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) |
| Stephen Street | 5daa3ba | 2006-05-20 15:00:19 -0700 | [diff] [blame] | 36 | #define SSP_TIMEOUT_SCALE (769) |
| Stephen Street | e0c9905 | 2006-03-07 23:53:24 -0800 | [diff] [blame] | 37 | #endif |
| 38 | |
| Stephen Street | 5daa3ba | 2006-05-20 15:00:19 -0700 | [diff] [blame] | 39 | #define SSP_TIMEOUT(x) ((x*10000)/SSP_TIMEOUT_SCALE) |
| Stephen Street | e0c9905 | 2006-03-07 23:53:24 -0800 | [diff] [blame] | 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 | |
| 44 | enum 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 */ |
| 52 | struct 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 | */ |
| 62 | struct 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_*/ |