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
  45 /* flow control bitfields */
  46 #define IFX_SPI_DCD                     0
  47 #define IFX_SPI_CTS                     1
  48 #define IFX_SPI_DSR                     2
  49 #define IFX_SPI_RI                      3
  50 #define IFX_SPI_DTR                     4
  51 #define IFX_SPI_RTS                     5
  52 #define IFX_SPI_TX_FC                   6
  53 #define IFX_SPI_RX_FC                   7
  54 #define IFX_SPI_UPDATE                  8
  55
  56 #define IFX_SPI_PAYLOAD_SIZE            (IFX_SPI_TRANSFER_SIZE - \
  57                                                 IFX_SPI_HEADER_OVERHEAD)
  58
  59 #define IFX_SPI_IRQ_TYPE                DETECT_EDGE_RISING
  60 #define IFX_SPI_GPIO_TARGET             0
  61 #define IFX_SPI_GPIO0                   0x105
  62
  63 #define IFX_SPI_STATUS_TIMEOUT          (2000*HZ)
  64
  65 /* values for bits in power status byte */
  66 #define IFX_SPI_POWER_DATA_PENDING      1
  67 #define IFX_SPI_POWER_SRDY              2
  68
  69 struct ifx_spi_device {
  70         /* Our SPI device */
  71         struct spi_device *spi_dev;
  72
  73         /* Port specific data */
  74         struct kfifo tx_fifo;
  75         spinlock_t fifo_lock;
  76         unsigned long signal_state;
  77
  78         /* TTY Layer logic */
  79         struct tty_port tty_port;
  80         struct device *tty_dev;
  81         int minor;
  82
  83         /* Low level I/O work */
  84         struct tasklet_struct io_work_tasklet;
  85         unsigned long flags;
  86         dma_addr_t rx_dma;
  87         dma_addr_t tx_dma;
  88
  89         int modem;              /* Modem type */
  90         int use_dma;            /* provide dma-able addrs in SPI msg */
  91         long max_hz;            /* max SPI frequency */
  92
  93         spinlock_t write_lock;
  94         int write_pending;
  95         spinlock_t power_lock;
  96         unsigned char power_status;
  97
  98         unsigned char *rx_buffer;
  99         unsigned char *tx_buffer;
 100         dma_addr_t rx_bus;
 101         dma_addr_t tx_bus;
 102         unsigned char spi_more;
 103         unsigned char spi_slave_cts;
 104
 105         struct timer_list spi_timer;
 106
 107         struct spi_message spi_msg;
 108         struct spi_transfer spi_xfer;
 109
 110         struct {
 111                 /* gpio lines */
 112                 unsigned short srdy;            /* slave-ready gpio */
 113                 unsigned short mrdy;            /* master-ready gpio */
 114                 unsigned short reset;           /* modem-reset gpio */
 115                 unsigned short po;              /* modem-on gpio */
 116                 unsigned short reset_out;       /* modem-in-reset gpio */
 117                 /* state/stats */
 118                 int unack_srdy_int_nb;
 119         } gpio;
 120
 121         /* modem reset */
 122         unsigned long mdm_reset_state;
 123 #define MR_START        0
 124 #define MR_INPROGRESS   1
 125 #define MR_COMPLETE     2
 126         wait_queue_head_t mdm_reset_wait;
 127 };
 128
 129 #endif /* _IFX6X60_H */