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#define IFX_SPI_STATE_IO_AVAILABLE	4
 45
 46/* flow control bitfields */
 47#define IFX_SPI_DCD			0
 48#define IFX_SPI_CTS			1
 49#define IFX_SPI_DSR			2
 50#define IFX_SPI_RI			3
 51#define IFX_SPI_DTR			4
 52#define IFX_SPI_RTS			5
 53#define IFX_SPI_TX_FC			6
 54#define IFX_SPI_RX_FC			7
 55#define IFX_SPI_UPDATE			8
 56
 57#define IFX_SPI_PAYLOAD_SIZE		(IFX_SPI_TRANSFER_SIZE - \
 58						IFX_SPI_HEADER_OVERHEAD)
 59
 60#define IFX_SPI_IRQ_TYPE		DETECT_EDGE_RISING
 61#define IFX_SPI_GPIO_TARGET		0
 62#define IFX_SPI_GPIO0			0x105
 63
 64#define IFX_SPI_STATUS_TIMEOUT		(2000*HZ)
 65
 66/* values for bits in power status byte */
 67#define IFX_SPI_POWER_DATA_PENDING	1
 68#define IFX_SPI_POWER_SRDY		2
 69
 70struct ifx_spi_device {
 71	/* Our SPI device */
 72	struct spi_device *spi_dev;
 73
 74	/* Port specific data */
 75	struct kfifo tx_fifo;
 76	spinlock_t fifo_lock;
 77	unsigned long signal_state;
 78
 79	/* TTY Layer logic */
 80	struct tty_port tty_port;
 81	struct device *tty_dev;
 82	int minor;
 83
 84	/* Low level I/O work */
 85	struct tasklet_struct io_work_tasklet;
 86	unsigned long flags;
 87	dma_addr_t rx_dma;
 88	dma_addr_t tx_dma;
 89
 90	int modem;		/* Modem type */
 91	int use_dma;		/* provide dma-able addrs in SPI msg */
 92	long max_hz;		/* max SPI frequency */
 93
 94	spinlock_t write_lock;
 95	int write_pending;
 96	spinlock_t power_lock;
 97	unsigned char power_status;
 98
 99	unsigned char *rx_buffer;
100	unsigned char *tx_buffer;
101	dma_addr_t rx_bus;
102	dma_addr_t tx_bus;
103	unsigned char spi_more;
104	unsigned char spi_slave_cts;
105
106	struct timer_list spi_timer;
107
108	struct spi_message spi_msg;
109	struct spi_transfer spi_xfer;
110
111	struct {
112		/* gpio lines */
113		unsigned short srdy;		/* slave-ready gpio */
114		unsigned short mrdy;		/* master-ready gpio */
115		unsigned short reset;		/* modem-reset gpio */
116		unsigned short po;		/* modem-on gpio */
117		unsigned short reset_out;	/* modem-in-reset gpio */
118		/* state/stats */
119		int unack_srdy_int_nb;
120	} gpio;
121
122	/* modem reset */
123	unsigned long mdm_reset_state;
124#define MR_START	0
125#define MR_INPROGRESS	1
126#define MR_COMPLETE	2
127	wait_queue_head_t mdm_reset_wait;
128	void (*swap_buf)(unsigned char *buf, int len, void *end);
129};
130
131#endif /* _IFX6X60_H */