ipw2200.c

和我之前上载的intel 802.11协议源码是配套的

	u32 dif_len = addr - aligned_addr;
	u32 i;

	IPW_DEBUG_IO("addr = %i, buf = %p, num = %i\n", addr, buf, num);

	if (num <= 0) {
		return;
	}

	/* Write the first dword (or portion) byte by byte */
	if (unlikely(dif_len)) {
		_ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
		/* Start writing at aligned_addr + dif_len */
		for (i = dif_len; ((i < 4) && (num > 0)); i++, num--, buf++)
			_ipw_write8(priv, IPW_INDIRECT_DATA + i, *buf);
		aligned_addr += 4;
	}

	/* Write all of the middle dwords as dwords, with auto-increment */
	_ipw_write32(priv, IPW_AUTOINC_ADDR, aligned_addr);
	for (; num >= 4; buf += 4, aligned_addr += 4, num -= 4)
		_ipw_write32(priv, IPW_AUTOINC_DATA, *(u32 *) buf);

	/* Write the last dword (or portion) byte by byte */
	if (unlikely(num)) {
		_ipw_write32(priv, IPW_INDIRECT_ADDR, aligned_addr);
		for (i = 0; num > 0; i++, num--, buf++)
			_ipw_write8(priv, IPW_INDIRECT_DATA + i, *buf);
	}
}

/* General purpose, no alignment requirement, iterative (multi-byte) write, */
/*    for 1st 4K of SRAM/regs space */
static void ipw_write_direct(struct ipw_priv *priv, u32 addr, void *buf,
			     int num)
{
	memcpy_toio((priv->hw_base + addr), buf, num);
}

/* Set bit(s) in low 4K of SRAM/regs */
static inline void ipw_set_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
	ipw_write32(priv, reg, ipw_read32(priv, reg) | mask);
}

/* Clear bit(s) in low 4K of SRAM/regs */
static inline void ipw_clear_bit(struct ipw_priv *priv, u32 reg, u32 mask)
{
	ipw_write32(priv, reg, ipw_read32(priv, reg) & ~mask);
}

static inline void __ipw_enable_interrupts(struct ipw_priv *priv)
{
	if (priv->status & STATUS_INT_ENABLED)
		return;
	priv->status |= STATUS_INT_ENABLED;
	ipw_write32(priv, IPW_INTA_MASK_R, IPW_INTA_MASK_ALL);
}

static inline void __ipw_disable_interrupts(struct ipw_priv *priv)
{
	if (!(priv->status & STATUS_INT_ENABLED))
		return;
	priv->status &= ~STATUS_INT_ENABLED;
	ipw_write32(priv, IPW_INTA_MASK_R, ~IPW_INTA_MASK_ALL);
}

static inline void ipw_enable_interrupts(struct ipw_priv *priv)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->irq_lock, flags);
	__ipw_enable_interrupts(priv);
	spin_unlock_irqrestore(&priv->irq_lock, flags);
}

static inline void ipw_disable_interrupts(struct ipw_priv *priv)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->irq_lock, flags);
	__ipw_disable_interrupts(priv);
	spin_unlock_irqrestore(&priv->irq_lock, flags);
}

static char *ipw_error_desc(u32 val)
{
	switch (val) {
	case IPW_FW_ERROR_OK:
		return "ERROR_OK";
	case IPW_FW_ERROR_FAIL:
		return "ERROR_FAIL";
	case IPW_FW_ERROR_MEMORY_UNDERFLOW:
		return "MEMORY_UNDERFLOW";
	case IPW_FW_ERROR_MEMORY_OVERFLOW:
		return "MEMORY_OVERFLOW";
	case IPW_FW_ERROR_BAD_PARAM:
		return "BAD_PARAM";
	case IPW_FW_ERROR_BAD_CHECKSUM:
		return "BAD_CHECKSUM";
	case IPW_FW_ERROR_NMI_INTERRUPT:
		return "NMI_INTERRUPT";
	case IPW_FW_ERROR_BAD_DATABASE:
		return "BAD_DATABASE";
	case IPW_FW_ERROR_ALLOC_FAIL:
		return "ALLOC_FAIL";
	case IPW_FW_ERROR_DMA_UNDERRUN:
		return "DMA_UNDERRUN";
	case IPW_FW_ERROR_DMA_STATUS:
		return "DMA_STATUS";
	case IPW_FW_ERROR_DINO_ERROR:
		return "DINO_ERROR";
	case IPW_FW_ERROR_EEPROM_ERROR:
		return "EEPROM_ERROR";
	case IPW_FW_ERROR_SYSASSERT:
		return "SYSASSERT";
	case IPW_FW_ERROR_FATAL_ERROR:
		return "FATAL_ERROR";
	default:
		return "UNKNOWN_ERROR";
	}
}

static void ipw_dump_error_log(struct ipw_priv *priv,
			       struct ipw_fw_error *error)
{
	u32 i;

	if (!error) {
		IPW_ERROR("Error allocating and capturing error log.  "
			  "Nothing to dump.\n");
		return;
	}

	IPW_ERROR("Start IPW Error Log Dump:\n");
	IPW_ERROR("Status: 0x%08X, Config: %08X\n",
		  error->status, error->config);

	for (i = 0; i < error->elem_len; i++)
		IPW_ERROR("%s %i 0x%08x  0x%08x  0x%08x  0x%08x  0x%08x\n",
			  ipw_error_desc(error->elem[i].desc),
			  error->elem[i].time,
			  error->elem[i].blink1,
			  error->elem[i].blink2,
			  error->elem[i].link1,
			  error->elem[i].link2, error->elem[i].data);
	for (i = 0; i < error->log_len; i++)
		IPW_ERROR("%i\t0x%08x\t%i\n",
			  error->log[i].time,
			  error->log[i].data, error->log[i].event);
}

static inline int ipw_is_init(struct ipw_priv *priv)
{
	return (priv->status & STATUS_INIT) ? 1 : 0;
}

#include "compat.c"

static int ipw_get_ordinal(struct ipw_priv *priv, u32 ord, void *val, u32 * len)
{
	u32 addr, field_info, field_len, field_count, total_len;

	IPW_DEBUG_ORD("ordinal = %i\n", ord);

	if (!priv || !val || !len) {
		IPW_DEBUG_ORD("Invalid argument\n");
		return -EINVAL;
	}

	/* verify device ordinal tables have been initialized */
	if (!priv->table0_addr || !priv->table1_addr || !priv->table2_addr) {
		IPW_DEBUG_ORD("Access ordinals before initialization\n");
		return -EINVAL;
	}

	switch (IPW_ORD_TABLE_ID_MASK & ord) {
	case IPW_ORD_TABLE_0_MASK:
		/*
		 * TABLE 0: Direct access to a table of 32 bit values
		 *
		 * This is a very simple table with the data directly
		 * read from the table
		 */

		/* remove the table id from the ordinal */
		ord &= IPW_ORD_TABLE_VALUE_MASK;

		/* boundary check */
		if (ord > priv->table0_len) {
			IPW_DEBUG_ORD("ordinal value (%i) longer then "
				      "max (%i)\n", ord, priv->table0_len);
			return -EINVAL;
		}

		/* verify we have enough room to store the value */
		if (*len < sizeof(u32)) {
			IPW_DEBUG_ORD("ordinal buffer length too small, "
				      "need %zd\n", sizeof(u32));
			return -EINVAL;
		}

		IPW_DEBUG_ORD("Reading TABLE0[%i] from offset 0x%08x\n",
			      ord, priv->table0_addr + (ord << 2));

		*len = sizeof(u32);
		ord <<= 2;
		*((u32 *) val) = ipw_read32(priv, priv->table0_addr + ord);
		break;

	case IPW_ORD_TABLE_1_MASK:
		/*
		 * TABLE 1: Indirect access to a table of 32 bit values
		 *
		 * This is a fairly large table of u32 values each
		 * representing starting addr for the data (which is
		 * also a u32)
		 */

		/* remove the table id from the ordinal */
		ord &= IPW_ORD_TABLE_VALUE_MASK;

		/* boundary check */
		if (ord > priv->table1_len) {
			IPW_DEBUG_ORD("ordinal value too long\n");
			return -EINVAL;
		}

		/* verify we have enough room to store the value */
		if (*len < sizeof(u32)) {
			IPW_DEBUG_ORD("ordinal buffer length too small, "
				      "need %zd\n", sizeof(u32));
			return -EINVAL;
		}

		*((u32 *) val) =
		    ipw_read_reg32(priv, (priv->table1_addr + (ord << 2)));
		*len = sizeof(u32);
		break;

	case IPW_ORD_TABLE_2_MASK:
		/*
		 * TABLE 2: Indirect access to a table of variable sized values
		 *
		 * This table consist of six values, each containing
		 *     - dword containing the starting offset of the data
		 *     - dword containing the lengh in the first 16bits
		 *       and the count in the second 16bits
		 */

		/* remove the table id from the ordinal */
		ord &= IPW_ORD_TABLE_VALUE_MASK;

		/* boundary check */
		if (ord > priv->table2_len) {
			IPW_DEBUG_ORD("ordinal value too long\n");
			return -EINVAL;
		}

		/* get the address of statistic */
		addr = ipw_read_reg32(priv, priv->table2_addr + (ord << 3));

		/* get the second DW of statistics ;
		 * two 16-bit words - first is length, second is count */
		field_info =
		    ipw_read_reg32(priv,
				   priv->table2_addr + (ord << 3) +
				   sizeof(u32));

		/* get each entry length */
		field_len = *((u16 *) & field_info);

		/* get number of entries */
		field_count = *(((u16 *) & field_info) + 1);

		/* abort if not enought memory */
		total_len = field_len * field_count;
		if (total_len > *len) {
			*len = total_len;
			return -EINVAL;
		}

		*len = total_len;
		if (!total_len)
			return 0;

		IPW_DEBUG_ORD("addr = 0x%08x, total_len = %i, "
			      "field_info = 0x%08x\n",
			      addr, total_len, field_info);
		ipw_read_indirect(priv, addr, val, total_len);
		break;

	default:
		IPW_DEBUG_ORD("Invalid ordinal!\n");
		return -EINVAL;

	}

	return 0;
}

static void ipw_init_ordinals(struct ipw_priv *priv)
{
	priv->table0_addr = IPW_ORDINALS_TABLE_LOWER;
	priv->table0_len = ipw_read32(priv, priv->table0_addr);

	IPW_DEBUG_ORD("table 0 offset at 0x%08x, len = %i\n",
		      priv->table0_addr, priv->table0_len);

	priv->table1_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_1);
	priv->table1_len = ipw_read_reg32(priv, priv->table1_addr);

	IPW_DEBUG_ORD("table 1 offset at 0x%08x, len = %i\n",
		      priv->table1_addr, priv->table1_len);

	priv->table2_addr = ipw_read32(priv, IPW_ORDINALS_TABLE_2);
	priv->table2_len = ipw_read_reg32(priv, priv->table2_addr);
	priv->table2_len &= 0x0000ffff;	/* use first two bytes */

	IPW_DEBUG_ORD("table 2 offset at 0x%08x, len = %i\n",
		      priv->table2_addr, priv->table2_len);

}

static u32 ipw_register_toggle(u32 reg)
{
	reg &= ~IPW_START_STANDBY;
	if (reg & IPW_GATE_ODMA)
		reg &= ~IPW_GATE_ODMA;
	if (reg & IPW_GATE_IDMA)
		reg &= ~IPW_GATE_IDMA;
	if (reg & IPW_GATE_ADMA)
		reg &= ~IPW_GATE_ADMA;
	return reg;
}

/*
 * LED behavior:
 * - On radio ON, turn on any LEDs that require to be on during start
 * - On initialization, start unassociated blink
 * - On association, disable unassociated blink
 * - On disassociation, start unassociated blink
 * - On radio OFF, turn off any LEDs started during radio on
 *
 */
#define LD_TIME_LINK_ON msecs_to_jiffies(300)
#define LD_TIME_LINK_OFF msecs_to_jiffies(2700)
#define LD_TIME_ACT_ON msecs_to_jiffies(250)

static void ipw_led_link_on(struct ipw_priv *priv)
{
	unsigned long flags;
	u32 led;

	/* If configured to not use LEDs, or nic_type is 1,
	 * then we don't toggle a LINK led */
	if (priv->config & CFG_NO_LED || priv->nic_type == EEPROM_NIC_TYPE_1)
		return;

	spin_lock_irqsave(&priv->lock, flags);

	if (!(priv->status & STATUS_RF_KILL_MASK) &&
	    !(priv->status & STATUS_LED_LINK_ON)) {
		IPW_DEBUG_LED("Link LED On\n");
		led = ipw_read_reg32(priv, IPW_EVENT_REG);
		led |= priv->led_association_on;

		led = ipw_register_toggle(led);

		IPW_DEBUG_LED("Reg: 0x%08X\n", led);
		ipw_write_reg32(priv, IPW_EVENT_REG, led);

		priv->status |= STATUS_LED_LINK_ON;

		/* If we aren't associated, schedule turning the LED off */
		if (!(priv->status & STATUS_ASSOCIATED))
			queue_delayed_work(priv->workqueue,
					   &priv->led_link_off,
					   LD_TIME_LINK_ON);
	}

	spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_link_on(void *data)
{
	struct ipw_priv *priv = data;
	mutex_lock(&priv->mutex);
	ipw_led_link_on(data);
	mutex_unlock(&priv->mutex);
}

static void ipw_led_link_off(struct ipw_priv *priv)
{
	unsigned long flags;
	u32 led;

	/* If configured not to use LEDs, or nic type is 1,
	 * then we don't goggle the LINK led. */
	if (priv->config & CFG_NO_LED || priv->nic_type == EEPROM_NIC_TYPE_1)
		return;

	spin_lock_irqsave(&priv->lock, flags);

	if (priv->status & STATUS_LED_LINK_ON) {
		led = ipw_read_reg32(priv, IPW_EVENT_REG);
		led &= priv->led_association_off;
		led = ipw_register_toggle(led);

		IPW_DEBUG_LED("Reg: 0x%08X\n", led);
		ipw_write_reg32(priv, IPW_EVENT_REG, led);

		IPW_DEBUG_LED("Link LED Off\n");

		priv->status &= ~STATUS_LED_LINK_ON;

		/* If we aren't associated and the radio is on, schedule
		 * turning the LED on (blink while unassociated) */
		if (!(priv->status & STATUS_RF_KILL_MASK) &&
		    !(priv->status & STATUS_ASSOCIATED))
			queue_delayed_work(priv->workqueue, &priv->led_link_on,
					   LD_TIME_LINK_OFF);

	}

	spin_unlock_irqrestore(&priv->lock, flags);
}

static void ipw_bg_led_link_off(void *data)
{
	struct ipw_priv *priv = data;
	mutex_lock(&priv->mutex);
	ipw_led_link_off(data);
	mutex_unlock(&priv->mutex);
}

static void __ipw_led_activity_on(struct ipw_priv *priv)
{
	u32 led;

	if (priv->config & CFG_NO_LED)
		return;

	if (priv->status & STATUS_RF_KILL_MASK)
		return;

	if (!(priv->status & STATUS_LED_ACT_ON)) {
		led = ipw_read_reg32(priv, IPW_EVENT_REG);
		led |= priv->led_activity_on;

		led = ipw_register_toggle(led);

		IPW_DEBUG_LED("Reg: 0x%08X\n", led);
		ipw_write_reg32(priv, IPW_EVENT_REG, led);

		IPW_DEBUG_LED("Activity LED On\n");

		priv->status |= STATUS_LED_ACT_ON;

		cancel_delayed_work(&priv->led_act_off);
		queue_delayed_work(priv->workqueue, &priv->led_act_off,
				   LD_TIME_ACT_ON);
	} else {
		/* Reschedule LED off for full time period */
		cancel_delayed_work(&priv->led_act_off);
		queue_delayed_work(priv->workqueue, &priv->led_act_off,
				   LD_TIME_ACT_ON);
	}
}

#if 0
void ipw_led_activity_on(struct ipw_priv *priv)
{
	unsigned long flags;
	spin_lock_irqsave(&priv->lock, flags);
	__ipw_led_activity_on(priv);
	spin_unlock_irqrestore(&priv->lock, flags);
}
#endif				/*  0  */

static void ipw_led_activity_off(struct ipw_priv *priv)
{
	unsigned long flags;
	u32 led;