LXR linux/include/linux/spi/pxa2xx

   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
  22struct dma_chan;
  23
  24/* device.platform_data for SSP controller devices */
  25struct 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 */
  42struct 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
  57extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
  58
  59#endif
  60#endif
  61