path: root/drivers/net/wireless/orinoco/hw.c

/* Encapsulate basic setting changes and retrieval on Hermes hardware
 *
 * See copyright notice in main.c
 */
#include <linux/kernel.h>
#include <linux/if_arp.h>
#include <linux/ieee80211.h>
#include <linux/wireless.h>

#include "hermes.h"
#include "hermes_rid.h"
#include "orinoco.h"

#include "hw.h"

#define SYMBOL_MAX_VER_LEN	(14)

/* Symbol firmware has a bug allocating buffers larger than this */
#define TX_NICBUF_SIZE_BUG	1585

/********************************************************************/
/* Data tables                                                      */
/********************************************************************/

/* This tables gives the actual meanings of the bitrate IDs returned
 * by the firmware. */
static const struct {
	int bitrate; /* in 100s of kilobits */
	int automatic;
	u16 agere_txratectrl;
	u16 intersil_txratectrl;
} bitrate_table[] = {
	{110, 1,  3, 15}, /* Entry 0 is the default */
	{10,  0,  1,  1},
	{10,  1,  1,  1},
	{20,  0,  2,  2},
	{20,  1,  6,  3},
	{55,  0,  4,  4},
	{55,  1,  7,  7},
	{110, 0,  5,  8},
};
#define BITRATE_TABLE_SIZE ARRAY_SIZE(bitrate_table)

/* Firmware version encoding */
struct comp_id {
	u16 id, variant, major, minor;
} __attribute__ ((packed));

static inline fwtype_t determine_firmware_type(struct comp_id *nic_id)
{
	if (nic_id->id < 0x8000)
		return FIRMWARE_TYPE_AGERE;
	else if (nic_id->id == 0x8000 && nic_id->major == 0)
		return FIRMWARE_TYPE_SYMBOL;
	else
		return FIRMWARE_TYPE_INTERSIL;
}

/* Set priv->firmware type, determine firmware properties */
int determine_fw_capabilities(struct orinoco_private *priv)
{
	struct net_device *dev = priv->ndev;
	hermes_t *hw = &priv->hw;
	int err;
	struct comp_id nic_id, sta_id;
	unsigned int firmver;
	char tmp[SYMBOL_MAX_VER_LEN+1] __attribute__((aligned(2)));

	/* Get the hardware version */
	err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_NICID, &nic_id);
	if (err) {
		printk(KERN_ERR "%s: Cannot read hardware identity: error %d\n",
		       dev->name, err);
		return err;
	}

	le16_to_cpus(&nic_id.id);
	le16_to_cpus(&nic_id.variant);
	le16_to_cpus(&nic_id.major);
	le16_to_cpus(&nic_id.minor);
	printk(KERN_DEBUG "%s: Hardware identity %04x:%04x:%04x:%04x\n",
	       dev->name, nic_id.id, nic_id.variant,
	       nic_id.major, nic_id.minor);

	priv->firmware_type = determine_firmware_type(&nic_id);

	/* Get the firmware version */
	err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_STAID, &sta_id);
	if (err) {
		printk(KERN_ERR "%s: Cannot read station identity: error %d\n",
		       dev->name, err);
		return err;
	}

	le16_to_cpus(&sta_id.id);
	le16_to_cpus(&sta_id.variant);
	le16_to_cpus(&sta_id.major);
	le16_to_cpus(&sta_id.minor);
	printk(KERN_DEBUG "%s: Station identity  %04x:%04x:%04x:%04x\n",
	       dev->name, sta_id.id, sta_id.variant,
	       sta_id.major, sta_id.minor);

	switch (sta_id.id) {
	case 0x15:
		printk(KERN_ERR "%s: Primary firmware is active\n",
		       dev->name);
		return -ENODEV;
	case 0x14b:
		printk(KERN_ERR "%s: Tertiary firmware is active\n",
		       dev->name);
		return -ENODEV;
	case 0x1f:	/* Intersil, Agere, Symbol Spectrum24 */
	case 0x21:	/* Symbol Spectrum24 Trilogy */
		break;
	default:
		printk(KERN_NOTICE "%s: Unknown station ID, please report\n",
		       dev->name);
		break;
	}

	/* Default capabilities */
	priv->has_sensitivity = 1;
	priv->has_mwo = 0;
	priv->has_preamble = 0;
	priv->has_port3 = 1;
	priv->has_ibss = 1;
	priv->has_wep = 0;
	priv->has_big_wep = 0;
	priv->has_alt_txcntl = 0;
	priv->has_ext_scan = 0;
	priv->has_wpa = 0;
	priv->do_fw_download = 0;

	/* Determine capabilities from the firmware version */
	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
		/* Lucent Wavelan IEEE, Lucent Orinoco, Cabletron RoamAbout,
		   ELSA, Melco, HP, IBM, Dell 1150, Compaq 110/210 */
		snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
			 "Lucent/Agere %d.%02d", sta_id.major, sta_id.minor);

		firmver = ((unsigned long)sta_id.major << 16) | sta_id.minor;

		priv->has_ibss = (firmver >= 0x60006);
		</