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
 13struct 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
 56struct 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 */