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 struct gpio_desc;
  14
  15 #define DRVNAME                         "ifx6x60"
  16 #define TTYNAME                         "ttyIFX"
  17
  18 #define IFX_SPI_MAX_MINORS              1
  19 #define IFX_SPI_TRANSFER_SIZE           2048
  20 #define IFX_SPI_FIFO_SIZE               4096
  21
  22 #define IFX_SPI_HEADER_OVERHEAD         4
  23 #define IFX_RESET_TIMEOUT               msecs_to_jiffies(50)
  24
  25 /* device flags bitfield definitions */
  26 #define IFX_SPI_STATE_PRESENT           0
  27 #define IFX_SPI_STATE_IO_IN_PROGRESS    1
  28 #define IFX_SPI_STATE_IO_READY          2
  29 #define IFX_SPI_STATE_TIMER_PENDING     3
  30 #define IFX_SPI_STATE_IO_AVAILABLE      4
  31
  32 /* flow control bitfields */
  33 #define IFX_SPI_DCD                     0
  34 #define IFX_SPI_CTS                     1
  35 #define IFX_SPI_DSR                     2
  36 #define IFX_SPI_RI                      3
  37 #define IFX_SPI_DTR                     4
  38 #define IFX_SPI_RTS                     5
  39 #define IFX_SPI_TX_FC                   6
  40 #define IFX_SPI_RX_FC                   7
  41 #define IFX_SPI_UPDATE                  8
  42
  43 #define IFX_SPI_PAYLOAD_SIZE            (IFX_SPI_TRANSFER_SIZE - \
  44                                                 IFX_SPI_HEADER_OVERHEAD)
  45
  46 #define IFX_SPI_IRQ_TYPE                DETECT_EDGE_RISING
  47 #define IFX_SPI_GPIO_TARGET             0
  48 #define IFX_SPI_GPIO0                   0x105
  49
  50 #define IFX_SPI_STATUS_TIMEOUT          (2000*HZ)
  51
  52 /* values for bits in power status byte */
  53 #define IFX_SPI_POWER_DATA_PENDING      1
  54 #define IFX_SPI_POWER_SRDY              2
  55
  56 struct ifx_spi_device {
  57         /* Our SPI device */
  58         struct spi_device *spi_dev;
  59
  60         /* Port specific data */
  61         struct kfifo tx_fifo;
  62         spinlock_t fifo_lock;
  63         unsigned long signal_state;
  64
  65         /* TTY Layer logic */
  66         struct tty_port tty_port;
  67         struct device *tty_dev;
  68         int minor;
  69
  70         /* Low level I/O work */
  71         struct tasklet_struct io_work_tasklet;
  72         unsigned long flags;
  73         dma_addr_t rx_dma;
  74         dma_addr_t tx_dma;
  75
  76         int modem;              /* Modem type */
  77         int use_dma;            /* provide dma-able addrs in SPI msg */
  78         long max_hz;            /* max SPI frequency */
  79
  80         spinlock_t write_lock;
  81         int write_pending;
  82         spinlock_t power_lock;
  83         unsigned char power_status;
  84
  85         unsigned char *rx_buffer;
  86         unsigned char *tx_buffer;
  87         dma_addr_t rx_bus;
  88         dma_addr_t tx_bus;
  89         unsigned char spi_more;
  90         unsigned char spi_slave_cts;
  91
  92         struct timer_list spi_timer;
  93
  94         struct spi_message spi_msg;
  95         struct spi_transfer spi_xfer;
  96
  97         struct {
  98                 /* gpio lines */
  99                 struct gpio_desc *srdy;         /* slave-ready gpio */
 100                 struct gpio_desc *mrdy;         /* master-ready gpio */
 101                 struct gpio_desc *reset;        /* modem-reset gpio */
 102                 struct gpio_desc *po;           /* modem-on gpio */
 103                 struct gpio_desc *reset_out;    /* modem-in-reset gpio */
 104                 struct gpio_desc *pmu_reset;    /* PMU reset gpio */
 105                 /* state/stats */
 106                 int unack_srdy_int_nb;
 107         } gpio;
 108
 109         /* modem reset */
 110         unsigned long mdm_reset_state;
 111 #define MR_START        0
 112 #define MR_INPROGRESS   1
 113 #define MR_COMPLETE     2
 114         wait_queue_head_t mdm_reset_wait;
 115         void (*swap_buf)(unsigned char *buf, int len, void *end);
 116 };
 117
 118 #endif /* _IFX6X60_H */