path: root/drivers/net/wireless/spectrum_cs.c

/*
 * Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
 * Symbol Wireless Networker LA4137, CompactFlash cards by Socket
 * Communications and Intel PRO/Wireless 2011B.
 *
 * The driver implements Symbol firmware download.  The rest is handled
 * in hermes.c and orinoco.c.
 *
 * Utilities for downloading the Symbol firmware are available at
 * http://sourceforge.net/projects/orinoco/
 *
 * Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
 * Portions based on orinoco_cs.c:
 * 	Copyright (C) David Gibson, Linuxcare Australia
 * Portions based on Spectrum24tDnld.c from original spectrum24 driver:
 * 	Copyright (C) Symbol Technologies.
 *
 * See copyright notice in file orinoco.c.
 */

#define DRIVER_NAME "spectrum_cs"
#define PFX DRIVER_NAME ": "

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include "orinoco.h"

static const char primary_fw_name[] = "symbol_sp24t_prim_fw";
static const char secondary_fw_name[] = "symbol_sp24t_sec_fw";

/********************************************************************/
/* Module stuff							    */
/********************************************************************/

MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
MODULE_LICENSE("Dual MPL/GPL");

/* Module parameters */

/* Some D-Link cards have buggy CIS. They do work at 5v properly, but
 * don't have any CIS entry for it. This workaround it... */
static int ignore_cis_vcc; /* = 0 */
module_param(ignore_cis_vcc, int, 0);
MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");

/********************************************************************/
/* Data structures						    */
/********************************************************************/

/* PCMCIA specific device information (goes in the card field of
 * struct orinoco_private */
struct orinoco_pccard {
	struct pcmcia_device	*p_dev;
	dev_node_t node;
};

/********************************************************************/
/* Function prototypes						    */
/********************************************************************/

static int spectrum_cs_config(struct pcmcia_device *link);
static void spectrum_cs_release(struct pcmcia_device *link);

/********************************************************************/
/* Firmware downloader						    */
/********************************************************************/

/* Position of PDA in the adapter memory */
#define EEPROM_ADDR	0x3000
#define EEPROM_LEN	0x200
#define PDA_OFFSET	0x100

#define PDA_ADDR	(EEPROM_ADDR + PDA_OFFSET)
#define PDA_WORDS	((EEPROM_LEN - PDA_OFFSET) / 2)

/* Constants for the CISREG_CCSR register */
#define HCR_RUN		0x07	/* run firmware after reset */
#define HCR_IDLE	0x0E	/* don't run firmware after reset */
#define HCR_MEM16	0x10	/* memory width bit, should be preserved */

/*
 * AUX port access.  To unlock the AUX port write the access keys to the
 * PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL
 * register.  Then read it and make sure it's HERMES_AUX_ENABLED.
 */
#define HERMES_AUX_ENABLE	0x8000	/* Enable auxiliary port access */
#define HERMES_AUX_DISABLE	0x4000	/* Disable to auxiliary port access */
#define HERMES_AUX_ENABLED	0xC000	/* Auxiliary port is open */

#define HERMES_AUX_PW0	0xFE01
#define HERMES_AUX_PW1	0xDC23
#define HERMES_AUX_PW2	0xBA45

/* End markers */
#define PDI_END		0x00000000	/* End of PDA */
#define BLOCK_END	0xFFFFFFFF	/* Last image block */
#define TEXT_END	0x1A		/* End of text header */

/*
 * The following structures have little-endian fields denoted by
 * the leading underscore.  Don't access them directly - use inline
 * functions defined below.
 */

/*
 * The binary image to be downloaded consists of series of data blocks.
 * Each block has the following structure.
 */
struct dblock {
	__le32 addr;		/* adapter address where to write the block */
	__le16 len;		/* length of the data only, in bytes */
	char data[0];		/* data to be written */
} __attribute__ ((packed));

/*
 * Plug Data References are located in in the image after the last data
 * block.  They refer to areas in the adapter memory where the plug data
 * items with matching ID should be written.
 */
struct pdr {
	__le32 id;		/* record ID */
	__le32 addr;		/* adapter address where to write the data */
	__le32 len;		/* expected length of the data, in bytes */
	char next[0];		/* next PDR starts here */
} __attribute__ ((packed));


/*
 * Plug Data Items are located in the EEPROM read from the adapter by
 * primary firmware.  They refer to the device-specific data that should
 * be plugged into the secondary firmware.
 */
struct pdi {
	__le16 len;		/* length of ID and data, in words */
	__le16 id;		/* record ID */
	char data[0];		/* plug data */
} __attribute__ ((packed));


/* Functions for access to little-endian data */
static inline u32
dblock_addr(const struct dblock *blk)
{
	return le32_to_cpu(blk->addr);
}

static inline u32
dblock_len(const struct dblock *blk)
{
	return le16_to_cpu(blk->len);
}

static inline u32
pdr_id(const struct pdr *pdr)
{
	return le32_to_cpu(pdr->id);
}

static inline u32
pdr_addr(const struct pdr *pdr)
{
	return le32_to_cpu(pdr->addr);
}

static inline u32
pdr_len(const struct pdr *pdr)
{
	return le32_to_cpu(pdr->len);
}

static inline u32
pdi_id(const struct pdi *pdi)
{
	return le16_to_cpu(pdi->id);
}

/* Return length of the data only, in bytes */
static inline u32
pdi_len(const struct pdi *pdi)
{
	return 2 * (le16_to_cpu(pdi->len) - 1);
}


/* Set address of the auxiliary port */
static inline void
spectrum_aux_setaddr(hermes_t *hw, u32 addr)
{
	hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7));
	hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F));
}


/* Open access to the auxiliary port */
static int
spectrum_aux_open(hermes_t *hw)
{
	int i;

	/* Already open? */
	if (hermes_read_reg(hw, HERMES_CONTROL) == HERMES_AUX_ENABLED)
		return 0;

	hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0);
	hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1);
	hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2);
	hermes_write_reg(hw, HERMES_CONTROL, HERMES_AUX_ENABLE);

	for (i = 0; i < 20; i++) {
		udelay(10);
		if (hermes_read_reg(hw, HERMES_CONTROL) ==
		    HERMES_AUX_ENABLED)
			return 0;
	}

	return -EBUSY;
}


#define CS_CHECK(fn, ret) \
  do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

/*
 * Reset the card using configuration registers COR and CCSR.
 * If IDLE is 1, stop the firmware, so that it can be safely rewritten.
 */
static int
spectrum_reset(struct pcmcia_device *link, int idle)
{
	int last_ret, last_fn;
	conf_reg_t reg;