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