LXR linux/drivers/tty/serial/ifx6x60.h

   1/****************************************************************************
   2 *
   3 * Driver for the IFX spi modem.
   4 *
   5 * Copyright (C) 2009, 2010 Intel Corp
   6 * Jim Stanley <jim.stanley@intel.com>
   7 *
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  21 * USA
  22 *
  23 *
  24 *
  25 *****************************************************************************/
  26#ifndef _IFX6X60_H
  27#define _IFX6X60_H
  28
  29#define DRVNAME                         "ifx6x60"
  30#define TTYNAME                         "ttyIFX"
  31
  32#define IFX_SPI_MAX_MINORS              1
  33#define IFX_SPI_TRANSFER_SIZE           2048
  34#define IFX_SPI_FIFO_SIZE               4096
  35
  36#define IFX_SPI_HEADER_OVERHEAD         4
  37#define IFX_RESET_TIMEOUT               msecs_to_jiffies(50)
  38
  39/* device flags bitfield definitions */
  40#define IFX_SPI_STATE_PRESENT           0
  41#define IFX_SPI_STATE_IO_IN_PROGRESS    1
  42#define IFX_SPI_STATE_IO_READY          2
  43#define IFX_SPI_STATE_TIMER_PENDING     3
  44#define IFX_SPI_STATE_IO_AVAILABLE      4
  45
  46/* flow control bitfields */
  47#define IFX_SPI_DCD                     0
  48#define IFX_SPI_CTS                     1
  49#define IFX_SPI_DSR                     2
  50#define IFX_SPI_RI                      3
  51#define IFX_SPI_DTR                     4
  52#define IFX_SPI_RTS                     5
  53#define IFX_SPI_TX_FC                   6
  54#define IFX_SPI_RX_FC                   7
  55#define IFX_SPI_UPDATE                  8
  56
  57#define IFX_SPI_PAYLOAD_SIZE            (IFX_SPI_TRANSFER_SIZE - \
  58                                                IFX_SPI_HEADER_OVERHEAD)
  59
  60#define IFX_SPI_IRQ_TYPE                DETECT_EDGE_RISING
  61#define IFX_SPI_GPIO_TARGET             0
  62#define IFX_SPI_GPIO0                   0x105
  63
  64#define IFX_SPI_STATUS_TIMEOUT          (2000*HZ)
  65
  66/* values for bits in power status byte */
  67#define IFX_SPI_POWER_DATA_PENDING      1
  68#define IFX_SPI_POWER_SRDY              2
  69
  70struct ifx_spi_device {
  71        /* Our SPI device */
  72        struct spi_device *spi_dev;
  73
  74        /* Port specific data */
  75        struct kfifo tx_fifo;
  76        spinlock_t fifo_lock;
  77        unsigned long signal_state;
  78
  79        /* TTY Layer logic */
  80        struct tty_port tty_port;
  81        struct device *tty_dev;
  82        int minor;
  83
  84        /* Low level I/O work */
  85        struct tasklet_struct io_work_tasklet;
  86        unsigned long flags;
  87        dma_addr_t rx_dma;
  88        dma_addr_t tx_dma;
  89
  90        int modem;              /* Modem type */
  91        int use_dma;            /* provide dma-able addrs in SPI msg */
  92        long max_hz;            /* max SPI frequency */
  93
  94        spinlock_t write_lock;
  95        int write_pending;
  96        spinlock_t power_lock;
  97        unsigned char power_status;
  98
  99        unsigned char *rx_buffer;
 100        unsigned char *tx_buffer;
 101        dma_addr_t rx_bus;
 102        dma_addr_t tx_bus;
 103        unsigned char spi_more;
 104        unsigned char spi_slave_cts;
 105
 106        struct timer_list spi_timer;
 107
 108        struct spi_message spi_msg;
 109        struct spi_transfer spi_xfer;
 110
 111        struct {
 112                /* gpio lines */
 113                unsigned short srdy;            /* slave-ready gpio */
 114                unsigned short mrdy;            /* master-ready gpio */
 115                unsigned short reset;           /* modem-reset gpio */
 116                unsigned short po;              /* modem-on gpio */
 117                unsigned short reset_out;       /* modem-in-reset gpio */
 118                /* state/stats */
 119                int unack_srdy_int_nb;
 120        } gpio;
 121
 122        /* modem reset */
 123        unsigned long mdm_reset_state;
 124#define MR_START        0
 125#define MR_INPROGRESS   1
 126#define MR_COMPLETE     2
 127        wait_queue_head_t mdm_reset_wait;
 128        void (*swap_buf)(unsigned char *buf, int len, void *end);
 129};
 130
 131#endif /* _IFX6X60_H */
 132