[deliverable/linux.git] / drivers / net / wireless / prism54 / isl_38xx.c

/*
 *  
 *  Copyright (C) 2002 Intersil Americas Inc.
 *  Copyright (C) 2003-2004 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>_
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/delay.h>

#include <asm/uaccess.h>
#include <asm/io.h>

#include "prismcompat.h"
#include "isl_38xx.h"
#include "islpci_dev.h"
#include "islpci_mgt.h"

/******************************************************************************
    Device Interface & Control functions
******************************************************************************/

/**
 * isl38xx_disable_interrupts - disable all interrupts
 * @device: pci memory base address
 *
 *  Instructs the device to disable all interrupt reporting by asserting 
 *  the IRQ line. New events may still show up in the interrupt identification
 *  register located at offset %ISL38XX_INT_IDENT_REG.
 */
void
isl38xx_disable_interrupts(void __iomem *device)
{
	isl38xx_w32_flush(device, 0x00000000, ISL38XX_INT_EN_REG);
	udelay(ISL38XX_WRITEIO_DELAY);
}

void
isl38xx_handle_sleep_request(isl38xx_control_block *control_block,
			     int *powerstate, void __iomem *device_base)
{
	/* device requests to go into sleep mode
	 * check whether the transmit queues for data and management are empty */
	if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ))
		/* data tx queue not empty */
		return;

	if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
		/* management tx queue not empty */
		return;

	/* check also whether received frames are pending */
	if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_DATA_LQ))
		/* data rx queue not empty */
		return;

	if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_MGMTQ))
		/* management rx queue not empty */
		return;

#if VERBOSE > SHOW_ERROR_MESSAGES
	DEBUG(SHOW_TRACING, "Device going to sleep mode\n");
#endif

	/* all queues are empty, allow the device to go into sleep mode */
	*powerstate = ISL38XX_PSM_POWERSAVE_STATE;

	/* assert the Sleep interrupt in the Device Interrupt Register */
	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_SLEEP,
			  ISL38XX_DEV_INT_REG);
	udelay(ISL38XX_WRITEIO_DELAY);
}

void
isl38xx_handle_wakeup(isl38xx_control_block *control_block,
		      int *powerstate, void __iomem *device_base)
{
	/* device is in active state, update the powerstate flag */
	*powerstate = ISL38XX_PSM_ACTIVE_STATE;

	/* now check whether there are frames pending for the card */
	if (!isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ)
	    && !isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
		return;

#if VERBOSE > SHOW_ERROR_MESSAGES
	DEBUG(SHOW_ANYTHING, "Wake up handler trigger the device\n");
#endif

	/* either data or management transmit queue has a frame pending
	 * trigger the device by setting the Update bit in the Device Int reg */
	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
			  ISL38XX_DEV_INT_REG);
	udelay(ISL38XX_WRITEIO_DELAY);
}

void
isl38xx_trigger_device(int asleep, void __iomem *device_base)
{
	u32 reg, counter = 0;

#if VERBOSE > SHOW_ERROR_MESSAGES
	struct timeval current_time;
	DEBUG(SHOW_FUNCTION_CALLS, "isl38xx trigger device\n");
#endif

	/* check whether the device is in power save mode */
	if (asleep) {
		/* device is in powersave, trigger the device for wakeup */
#if VERBOSE > SHOW_ERROR_MESSAGES
		do_gettimeofday(&current_time);
		DEBUG(SHOW_TRACING, "%08li.%08li Device wakeup triggered\n",
		      current_time.tv_sec, (long)current_time.tv_usec);

		DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
		      current_time.tv_sec, (long)current_time.tv_usec,
		      readl(device_base + ISL38XX_CTRL_STAT_REG));
#endif
		udelay(ISL38XX_WRITEIO_DELAY);

		reg = readl(device_base + ISL38XX_INT_IDENT_REG);
		if (reg == 0xabadface) {
#if VERBOSE > SHOW_ERROR_MESSAGES
			do_gettimeofday(&current_time);
			DEBUG(SHOW_TRACING,
			      "%08li.%08li Device register abadface\n",
			      current_time.tv_sec, (long)current_time.tv_usec);
#endif
			/* read the Device Status Register until Sleepmode bit is set */
			while (reg = readl(device_base + ISL38XX_CTRL_STAT_REG),
			       (reg & ISL38XX_CTRL_STAT_SLEEPMODE) == 0) {
				udelay(ISL38XX_WRITEIO_DELAY);
				counter++;
			}

#if VERBOSE > SHOW_ERROR_MESSAGES
			DEBUG(SHOW_TRACING,
			      "%08li.%08li Device register read %08x\n",
			      current_time.tv_sec, (long)current_time.tv_usec,
			      readl(device_base + ISL38XX_CTRL_STAT_REG));
#endif
			udelay(ISL38XX_WRITEIO_DELAY);

#if VERBOSE > SHOW_ERROR_MESSAGES
			do_gettimeofday(&current_time);
			DEBUG(SHOW_TRACING,
			      "%08li.%08li Device asleep counter %i\n",
			      current_time.tv_sec, (long)current_time.tv_usec,
			      counter);
#endif
		}
		/* assert the Wakeup interrupt in the Device Interrupt Register */
		isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_WAKEUP,
				  ISL38XX_DEV_INT_REG);
		udelay(ISL38XX_WRITEIO_DELAY);

		/* perform another read on the Device Status Register */
		reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
		udelay(ISL38XX_WRITEIO_DELAY);

#if VERBOSE > SHOW_ERROR_MESSAGES
		do_gettimeofday(&current_time);
		DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
		      current_time.tv_sec, (long)current_time.tv_usec, reg);
#endif
	} else {
		/* device is (still) awake  */
#if VERBOSE > SHOW_ERROR_MESSAGES
		DEBUG(SHOW_TRACING, "Device is in active state\n");
#endif
		/* trigger the device by setting the Update bit in the Device Int reg */

		isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
				  ISL38XX_DEV_INT_REG);
		udelay(ISL38XX_WRITEIO_DELAY);
	}
}

void
isl38xx_interface_reset(void __iomem *device_base, dma_addr_t host_address)
{
#if VERBOSE > SHOW_ERROR_MESSAGES
	DEBUG(SHOW_FUNCTION_CALLS, "isl38xx_interface_reset\n");
#endif

	/* load the address of the control block in the device */
	isl38xx_w32_flush(device_base, host_address, ISL38XX_CTRL_BLK_BASE_REG);
	udelay(ISL38XX_WRITEIO_DELAY);

	/* set the reset bit in the Device Interrupt Register */
	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_RESET, ISL38XX_DEV_INT_REG);
	udelay(ISL38XX_WRITEIO_DELAY);

	/* enable the interrupt for detecting initialization */

	/* Note: Do not enable other interrupts here. We want the
	 * device to have come up first 100% before allowing any other 
	 * interrupts. */
	isl38xx_w32_flush(device_base, ISL38XX_INT_IDENT_INIT, ISL38XX_INT_EN_REG);
	udelay(ISL38XX_WRITEIO_DELAY);  /* allow complete full reset */
}

void
isl38xx_enable_common_interrupts(void __iomem *device_base) {
	u32 reg;
	reg = ( ISL38XX_INT_IDENT_UPDATE | 
			ISL38XX_INT_IDENT_SLEEP | ISL38XX_INT_IDENT_WAKEUP);
	isl38xx_w32_flush(device_base, reg, ISL38XX_INT_EN_REG);
	udelay(ISL38XX_WRITEIO_DELAY);
}

int
isl38xx_in_queue(isl38xx_control_block *cb, int queue)
{
	const s32 delta = (le32_to_cpu(cb->driver_curr_frag[queue]) -
			   le32_to_cpu(cb->device_curr_frag[queue]));

	/* determine the amount of fragments in the queue depending on the type
	 * of the queue, either transmit or receive */

	BUG_ON(delta < 0);	/* driver ptr must be ahead of device ptr */

	switch (queue) {
		/* send queues */
	case ISL38XX_CB_TX_MGMTQ:
		BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
	case ISL38XX_CB_TX_DATA_LQ:
	case ISL38XX_CB_TX_DATA_HQ:
		BUG_ON(delta > ISL38XX_CB_TX_QSIZE);
		return delta;
		break;

		/* receive queues */
	case ISL38XX_CB_RX_MGMTQ:
		BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
		return ISL38XX_CB_MGMT_QSIZE - delta;
		break;

	case ISL38XX_CB_RX_DATA_LQ:
	case ISL38XX_CB_RX_DATA_HQ:
		BUG_ON(delta > ISL38XX_CB_RX_QSIZE);
		return ISL38XX_CB_RX_QSIZE - delta;
		break;
	}
	BUG();
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* Copyright (C) 2002 Intersil Americas Inc.
	4	* Copyright (C) 2003-2004 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>_
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*
	19	*/
	20
1da177e4 LT	21	#include <linux/module.h>
	22	#include <linux/types.h>
	23	#include <linux/delay.h>
	24
	25	#include <asm/uaccess.h>
	26	#include <asm/io.h>
	27
	28	#include "prismcompat.h"
	29	#include "isl_38xx.h"
	30	#include "islpci_dev.h"
	31	#include "islpci_mgt.h"
	32
	33	/******************************************************************************
	34	Device Interface & Control functions
	35	******************************************************************************/
	36
	37	/**
	38	* isl38xx_disable_interrupts - disable all interrupts
	39	* @device: pci memory base address
	40	*
	41	* Instructs the device to disable all interrupt reporting by asserting
	42	* the IRQ line. New events may still show up in the interrupt identification
	43	* register located at offset %ISL38XX_INT_IDENT_REG.
	44	*/
	45	void
	46	isl38xx_disable_interrupts(void __iomem *device)
	47	{
	48	isl38xx_w32_flush(device, 0x00000000, ISL38XX_INT_EN_REG);
	49	udelay(ISL38XX_WRITEIO_DELAY);
	50	}
	51
	52	void
	53	isl38xx_handle_sleep_request(isl38xx_control_block *control_block,
	54	int powerstate, void __iomem device_base)
	55	{
	56	/* device requests to go into sleep mode
	57	* check whether the transmit queues for data and management are empty */
	58	if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ))
	59	/* data tx queue not empty */
	60	return;
	61
	62	if (isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
	63	/* management tx queue not empty */
	64	return;
	65
	66	/* check also whether received frames are pending */
	67	if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_DATA_LQ))
	68	/* data rx queue not empty */
	69	return;
	70
	71	if (isl38xx_in_queue(control_block, ISL38XX_CB_RX_MGMTQ))
	72	/* management rx queue not empty */
	73	return;
	74
	75	#if VERBOSE > SHOW_ERROR_MESSAGES
	76	DEBUG(SHOW_TRACING, "Device going to sleep mode\n");
	77	#endif
	78
	79	/* all queues are empty, allow the device to go into sleep mode */
	80	*powerstate = ISL38XX_PSM_POWERSAVE_STATE;
	81
	82	/* assert the Sleep interrupt in the Device Interrupt Register */
	83	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_SLEEP,
	84	ISL38XX_DEV_INT_REG);
85	udelay(ISL38XX_WRITEIO_DELAY);
86	}
87
88	void
89	isl38xx_handle_wakeup(isl38xx_control_block *control_block,
90	int powerstate, void __iomem device_base)
91	{
92	/* device is in active state, update the powerstate flag */
93	*powerstate = ISL38XX_PSM_ACTIVE_STATE;
94
95	/* now check whether there are frames pending for the card */
96	if (!isl38xx_in_queue(control_block, ISL38XX_CB_TX_DATA_LQ)
97	&& !isl38xx_in_queue(control_block, ISL38XX_CB_TX_MGMTQ))
98	return;
99
100	#if VERBOSE > SHOW_ERROR_MESSAGES
101	DEBUG(SHOW_ANYTHING, "Wake up handler trigger the device\n");
102	#endif
103
104	/* either data or management transmit queue has a frame pending
105	* trigger the device by setting the Update bit in the Device Int reg */
106	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
107	ISL38XX_DEV_INT_REG);
108	udelay(ISL38XX_WRITEIO_DELAY);
109	}
110
111	void
112	isl38xx_trigger_device(int asleep, void __iomem *device_base)
113	{
1da177e4 LT	114	u32 reg, counter = 0;
	115
	116	#if VERBOSE > SHOW_ERROR_MESSAGES
05ab195c	117	struct timeval current_time;
1da177e4 LT	118	DEBUG(SHOW_FUNCTION_CALLS, "isl38xx trigger device\n");
	119	#endif
	120
	121	/* check whether the device is in power save mode */
	122	if (asleep) {
	123	/* device is in powersave, trigger the device for wakeup */
	124	#if VERBOSE > SHOW_ERROR_MESSAGES
	125	do_gettimeofday(&current_time);
	126	DEBUG(SHOW_TRACING, "%08li.%08li Device wakeup triggered\n",
	127	current_time.tv_sec, (long)current_time.tv_usec);
1da177e4 LT	128
	129	DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
	130	current_time.tv_sec, (long)current_time.tv_usec,
	131	readl(device_base + ISL38XX_CTRL_STAT_REG));
05ab195c	132	#endif
1da177e4 LT	133	udelay(ISL38XX_WRITEIO_DELAY);
	134
	135	reg = readl(device_base + ISL38XX_INT_IDENT_REG);
	136	if (reg == 0xabadface) {
	137	#if VERBOSE > SHOW_ERROR_MESSAGES
	138	do_gettimeofday(&current_time);
	139	DEBUG(SHOW_TRACING,
	140	"%08li.%08li Device register abadface\n",
	141	current_time.tv_sec, (long)current_time.tv_usec);
	142	#endif
	143	/* read the Device Status Register until Sleepmode bit is set */
	144	while (reg = readl(device_base + ISL38XX_CTRL_STAT_REG),
	145	(reg & ISL38XX_CTRL_STAT_SLEEPMODE) == 0) {
	146	udelay(ISL38XX_WRITEIO_DELAY);
	147	counter++;
	148	}
	149
05ab195c	150	#if VERBOSE > SHOW_ERROR_MESSAGES
1da177e4 LT	151	DEBUG(SHOW_TRACING,
	152	"%08li.%08li Device register read %08x\n",
	153	current_time.tv_sec, (long)current_time.tv_usec,
	154	readl(device_base + ISL38XX_CTRL_STAT_REG));
05ab195c	155	#endif
1da177e4 LT	156	udelay(ISL38XX_WRITEIO_DELAY);
	157
	158	#if VERBOSE > SHOW_ERROR_MESSAGES
	159	do_gettimeofday(&current_time);
	160	DEBUG(SHOW_TRACING,
	161	"%08li.%08li Device asleep counter %i\n",
	162	current_time.tv_sec, (long)current_time.tv_usec,
	163	counter);
	164	#endif
	165	}
	166	/* assert the Wakeup interrupt in the Device Interrupt Register */
	167	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_WAKEUP,
	168	ISL38XX_DEV_INT_REG);
	169	udelay(ISL38XX_WRITEIO_DELAY);
	170
	171	/* perform another read on the Device Status Register */
	172	reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
	173	udelay(ISL38XX_WRITEIO_DELAY);
	174
	175	#if VERBOSE > SHOW_ERROR_MESSAGES
	176	do_gettimeofday(&current_time);
	177	DEBUG(SHOW_TRACING, "%08li.%08li Device register read %08x\n",
	178	current_time.tv_sec, (long)current_time.tv_usec, reg);
	179	#endif
	180	} else {
	181	/* device is (still) awake */
	182	#if VERBOSE > SHOW_ERROR_MESSAGES
	183	DEBUG(SHOW_TRACING, "Device is in active state\n");
	184	#endif
	185	/* trigger the device by setting the Update bit in the Device Int reg */
	186
	187	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_UPDATE,
	188	ISL38XX_DEV_INT_REG);
	189	udelay(ISL38XX_WRITEIO_DELAY);
	190	}
	191	}
	192
	193	void
	194	isl38xx_interface_reset(void __iomem *device_base, dma_addr_t host_address)
	195	{
	196	#if VERBOSE > SHOW_ERROR_MESSAGES
	197	DEBUG(SHOW_FUNCTION_CALLS, "isl38xx_interface_reset\n");
	198	#endif
	199
	200	/* load the address of the control block in the device */
	201	isl38xx_w32_flush(device_base, host_address, ISL38XX_CTRL_BLK_BASE_REG);
	202	udelay(ISL38XX_WRITEIO_DELAY);
	203
	204	/* set the reset bit in the Device Interrupt Register */
	205	isl38xx_w32_flush(device_base, ISL38XX_DEV_INT_RESET, ISL38XX_DEV_INT_REG);
	206	udelay(ISL38XX_WRITEIO_DELAY);
	207
	208	/* enable the interrupt for detecting initialization */
	209
	210	/* Note: Do not enable other interrupts here. We want the
	211	* device to have come up first 100% before allowing any other
	212	* interrupts. */
	213	isl38xx_w32_flush(device_base, ISL38XX_INT_IDENT_INIT, ISL38XX_INT_EN_REG);
	214	udelay(ISL38XX_WRITEIO_DELAY); /* allow complete full reset */
	215	}
	216
	217	void
	218	isl38xx_enable_common_interrupts(void __iomem *device_base) {
	219	u32 reg;
220	reg = ( ISL38XX_INT_IDENT_UPDATE \|
221	ISL38XX_INT_IDENT_SLEEP \| ISL38XX_INT_IDENT_WAKEUP);
222	isl38xx_w32_flush(device_base, reg, ISL38XX_INT_EN_REG);
223	udelay(ISL38XX_WRITEIO_DELAY);
224	}
225
226	int
227	isl38xx_in_queue(isl38xx_control_block *cb, int queue)
228	{
229	const s32 delta = (le32_to_cpu(cb->driver_curr_frag[queue]) -
230	le32_to_cpu(cb->device_curr_frag[queue]));
231
232	/* determine the amount of fragments in the queue depending on the type
233	* of the queue, either transmit or receive */
234
235	BUG_ON(delta < 0); /* driver ptr must be ahead of device ptr */
236
237	switch (queue) {
238	/* send queues */
239	case ISL38XX_CB_TX_MGMTQ:
240	BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
241	case ISL38XX_CB_TX_DATA_LQ:
242	case ISL38XX_CB_TX_DATA_HQ:
243	BUG_ON(delta > ISL38XX_CB_TX_QSIZE);
244	return delta;
245	break;
246
247	/* receive queues */
248	case ISL38XX_CB_RX_MGMTQ:
249	BUG_ON(delta > ISL38XX_CB_MGMT_QSIZE);
250	return ISL38XX_CB_MGMT_QSIZE - delta;
251	break;
252
253	case ISL38XX_CB_RX_DATA_LQ:
254	case ISL38XX_CB_RX_DATA_HQ:
255	BUG_ON(delta > ISL38XX_CB_RX_QSIZE);
256	return ISL38XX_CB_RX_QSIZE - delta;
257	break;
258	}
259	BUG();
260	return 0;
261	}