drivers/tty/serial/ifx6x60.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /****************************************************************************
   3  *
   4  * Driver for the IFX spi modem.
   5  *
   6  * Copyright (C) 2009, 2010 Intel Corp
   7  * Jim Stanley <jim.stanley@intel.com>
   8  *
   9  *****************************************************************************/
  10 #ifndef _IFX6X60_H
  11 #define _IFX6X60_H
  12
  13 #define DRVNAME                         "ifx6x60"
  14 #define TTYNAME                         "ttyIFX"
  15
  16 #define IFX_SPI_MAX_MINORS              1
  17 #define IFX_SPI_TRANSFER_SIZE           2048
  18 #define IFX_SPI_FIFO_SIZE               4096
  19
  20 #define IFX_SPI_HEADER_OVERHEAD         4
  21 #define IFX_RESET_TIMEOUT               msecs_to_jiffies(50)
  22
  23 /* device flags bitfield definitions */
  24 #define IFX_SPI_STATE_PRESENT           0
  25 #define IFX_SPI_STATE_IO_IN_PROGRESS    1
  26 #define IFX_SPI_STATE_IO_READY          2
  27 #define IFX_SPI_STATE_TIMER_PENDING     3
  28 #define IFX_SPI_STATE_IO_AVAILABLE      4
  29
  30 /* flow control bitfields */
  31 #define IFX_SPI_DCD                     0
  32 #define IFX_SPI_CTS                     1
  33 #define IFX_SPI_DSR                     2
  34 #define IFX_SPI_RI                      3
  35 #define IFX_SPI_DTR                     4
  36 #define IFX_SPI_RTS                     5
  37 #define IFX_SPI_TX_FC                   6
  38 #define IFX_SPI_RX_FC                   7
  39 #define IFX_SPI_UPDATE                  8
  40
  41 #define IFX_SPI_PAYLOAD_SIZE            (IFX_SPI_TRANSFER_SIZE - \
  42                                                 IFX_SPI_HEADER_OVERHEAD)
  43
  44 #define IFX_SPI_IRQ_TYPE                DETECT_EDGE_RISING
  45 #define IFX_SPI_GPIO_TARGET             0
  46 #define IFX_SPI_GPIO0                   0x105
  47
  48 #define IFX_SPI_STATUS_TIMEOUT          (2000*HZ)
  49
  50 /* values for bits in power status byte */
  51 #define IFX_SPI_POWER_DATA_PENDING      1
  52 #define IFX_SPI_POWER_SRDY              2
  53
  54 struct ifx_spi_device {
  55         /* Our SPI device */
  56         struct spi_device *spi_dev;
  57
  58         /* Port specific data */
  59         struct kfifo tx_fifo;
  60         spinlock_t fifo_lock;
  61         unsigned long signal_state;
  62
  63         /* TTY Layer logic */
  64         struct tty_port tty_port;
  65         struct device *tty_dev;
  66         int minor;
  67
  68         /* Low level I/O work */
  69         struct tasklet_struct io_work_tasklet;
  70         unsigned long flags;
  71         dma_addr_t rx_dma;
  72         dma_addr_t tx_dma;
  73
  74         int modem;              /* Modem type */
  75         int use_dma;            /* provide dma-able addrs in SPI msg */
  76         long max_hz;            /* max SPI frequency */
  77
  78         spinlock_t write_lock;
  79         int write_pending;
  80         spinlock_t power_lock;
  81         unsigned char power_status;
  82
  83         unsigned char *rx_buffer;
  84         unsigned char *tx_buffer;
  85         dma_addr_t rx_bus;
  86         dma_addr_t tx_bus;
  87         unsigned char spi_more;
  88         unsigned char spi_slave_cts;
  89
  90         struct timer_list spi_timer;
  91
  92         struct spi_message spi_msg;
  93         struct spi_transfer spi_xfer;
  94
  95         struct {
  96                 /* gpio lines */
  97                 unsigned short srdy;            /* slave-ready gpio */
  98                 unsigned short mrdy;            /* master-ready gpio */
  99                 unsigned short reset;           /* modem-reset gpio */
 100                 unsigned short po;              /* modem-on gpio */
 101                 unsigned short reset_out;       /* modem-in-reset gpio */
 102                 /* state/stats */
 103                 int unack_srdy_int_nb;
 104         } gpio;
 105
 106         /* modem reset */
 107         unsigned long mdm_reset_state;
 108 #define MR_START        0
 109 #define MR_INPROGRESS   1
 110 #define MR_COMPLETE     2
 111         wait_queue_head_t mdm_reset_wait;
 112         void (*swap_buf)(unsigned char *buf, int len, void *end);
 113 };
 114
 115 #endif /* _IFX6X60_H */