include/linux/spi/pxa2xx_spi.h

   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 */
  27 struct 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  */
  45 struct 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
  61 extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
  62
  63 #endif
  64 #endif