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 #ifndef __linux_pxa2xx_spi_h
  15 #define __linux_pxa2xx_spi_h
  16
  17 #include <linux/pxa2xx_ssp.h>
  18
  19 #define PXA2XX_CS_ASSERT (0x01)
  20 #define PXA2XX_CS_DEASSERT (0x02)
  21
  22 struct dma_chan;
  23
  24 /* device.platform_data for SSP controller devices */
  25 struct pxa2xx_spi_master {
  26         u16 num_chipselect;
  27         u8 enable_dma;
  28
  29         /* DMA engine specific config */
  30         bool (*dma_filter)(struct dma_chan *chan, void *param);
  31         void *tx_param;
  32         void *rx_param;
  33
  34         /* For non-PXA arches */
  35         struct ssp_device ssp;
  36 };
  37
  38 /* spi_board_info.controller_data for SPI slave devices,
  39  * copied to spi_device.platform_data ... mostly for dma tuning
  40  */
  41 struct pxa2xx_spi_chip {
  42         u8 tx_threshold;
  43         u8 tx_hi_threshold;
  44         u8 rx_threshold;
  45         u8 dma_burst_size;
  46         u32 timeout;
  47         u8 enable_loopback;
  48         int gpio_cs;
  49         void (*cs_control)(u32 command);
  50 };
  51
  52 #if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
  53
  54 #include <linux/clk.h>
  55
  56 extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
  57
  58 #endif
  59 #endif