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Commit af3b8881 authored by Russ Gorby's avatar Russ Gorby Committed by Greg Kroah-Hartman
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ifx6x60: SPI protocol driver for Infineon 6x60 modem 



Prototype driver for the IFX6x60 series of SPI attached modems by Jim
Stanley and Russ Gorby

Signed-off-by: default avatarRuss Gorby <richardx.r.gorby@intel.com>

[Some reworking and a major cleanup]

Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a7bcf21e

drivers/serial/Kconfig

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@@ -1632,4 +1632,10 @@ config SERIAL_ALTERA_UART_CONSOLE 
	help

	  Enable a Altera UART port to be the system console.



config SERIAL_IFX6X60

        tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)"

	depends on GPIOLIB && EXPERIMENTAL

	help

	  Support for the IFX6x60 modem devices on Intel MID platforms.



endmenu

drivers/serial/Makefile

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@@ -89,3 +89,4 @@ obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o 
obj-$(CONFIG_SERIAL_MRST_MAX3110)	+= mrst_max3110.o

obj-$(CONFIG_SERIAL_MFD_HSU)	+= mfd.o

obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o

obj-$(CONFIG_SERIAL_IFX6X60)  	+= ifx6x60.o

drivers/serial/ifx6x60.c

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File added.

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drivers/serial/ifx6x60.h

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/****************************************************************************

 *

 * Driver for the IFX spi modem.

 *

 * Copyright (C) 2009, 2010 Intel Corp

 * Jim Stanley <jim.stanley@intel.com>

 *

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,

 * USA

 *

 *

 *

 *****************************************************************************/

#ifndef _IFX6X60_H

#define _IFX6X60_H



#define DRVNAME				"ifx6x60"

#define TTYNAME				"ttyIFX"



/* #define IFX_THROTTLE_CODE */



#define IFX_SPI_MAX_MINORS		1

#define IFX_SPI_TRANSFER_SIZE		2048

#define IFX_SPI_FIFO_SIZE		4096



#define IFX_SPI_HEADER_OVERHEAD		4

#define IFX_RESET_TIMEOUT		msecs_to_jiffies(50)



/* device flags bitfield definitions */

#define IFX_SPI_STATE_PRESENT		0

#define IFX_SPI_STATE_IO_IN_PROGRESS	1

#define IFX_SPI_STATE_IO_READY		2

#define IFX_SPI_STATE_TIMER_PENDING	3



/* flow control bitfields */

#define IFX_SPI_DCD			0

#define IFX_SPI_CTS			1

#define IFX_SPI_DSR			2

#define IFX_SPI_RI			3

#define IFX_SPI_DTR			4

#define IFX_SPI_RTS			5

#define IFX_SPI_TX_FC			6

#define IFX_SPI_RX_FC			7

#define IFX_SPI_UPDATE			8



#define IFX_SPI_PAYLOAD_SIZE		(IFX_SPI_TRANSFER_SIZE - \

						IFX_SPI_HEADER_OVERHEAD)



#define IFX_SPI_IRQ_TYPE		DETECT_EDGE_RISING

#define IFX_SPI_GPIO_TARGET		0

#define IFX_SPI_GPIO0			0x105



#define IFX_SPI_STATUS_TIMEOUT		(2000*HZ)



/* values for bits in power status byte */

#define IFX_SPI_POWER_DATA_PENDING	1

#define IFX_SPI_POWER_SRDY		2



struct ifx_spi_device {

	/* Our SPI device */

	struct spi_device *spi_dev;



	/* Port specific data */

	struct kfifo tx_fifo;

	spinlock_t fifo_lock;

	unsigned long signal_state;



	/* TTY Layer logic */

	struct tty_port tty_port;

	struct device *tty_dev;

	int minor;



	/* Low level I/O work */

	struct tasklet_struct io_work_tasklet;

	unsigned long flags;

	dma_addr_t rx_dma;

	dma_addr_t tx_dma;



	int is_6160;				/* Modem type */



	spinlock_t write_lock;

	int write_pending;

	spinlock_t power_lock;

	unsigned char power_status;



	unsigned char *rx_buffer;

	unsigned char *tx_buffer;

	dma_addr_t rx_bus;

	dma_addr_t tx_bus;

	unsigned char spi_more;

	unsigned char spi_slave_cts;



	struct timer_list spi_timer;



	struct spi_message spi_msg;

	struct spi_transfer spi_xfer;



	struct {

		/* gpio lines */

		unsigned short srdy;		/* slave-ready gpio */

		unsigned short mrdy;		/* master-ready gpio */

		unsigned short reset;		/* modem-reset gpio */

		unsigned short po;		/* modem-on gpio */

		unsigned short reset_out;	/* modem-in-reset gpio */

		/* state/stats */

		int unack_srdy_int_nb;

	} gpio;



	/* modem reset */

	unsigned long mdm_reset_state;

#define MR_START	0

#define MR_INPROGRESS	1

#define MR_COMPLETE	2

	wait_queue_head_t mdm_reset_wait;

};



#endif /* _IFX6X60_H */

include/linux/spi/ifx_modem.h

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#ifndef LINUX_IFX_MODEM_H

#define LINUX_IFX_MODEM_H



struct ifx_modem_platform_data {

	unsigned short rst_out; /* modem reset out */

	unsigned short pwr_on;  /* power on */

	unsigned short rst_pmu; /* reset modem */

	unsigned short tx_pwr;  /* modem power threshold */

	unsigned short srdy;    /* SRDY */

	unsigned short mrdy;    /* MRDY */

	unsigned short is_6160;	/* Modem type */

};



#endif