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 */
119