drivers/staging/comedi/drivers/mite.c

/*
    comedi/drivers/mite.c
    Hardware driver for NI Mite PCI interface chip

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1997-2002 David A. Schleef <ds@schleef.org>

    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, or
    (at your option) any later version.

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/*
	The PCI-MIO E series driver was originally written by
	Tomasz Motylewski <...>, and ported to comedi by ds.

	References for specifications:

	   321747b.pdf  Register Level Programmer Manual (obsolete)
	   321747c.pdf  Register Level Programmer Manual (new)
	   DAQ-STC reference manual

	Other possibly relevant info:

	   320517c.pdf  User manual (obsolete)
	   320517f.pdf  User manual (new)
	   320889a.pdf  delete
	   320906c.pdf  maximum signal ratings
	   321066a.pdf  about 16x
	   321791a.pdf  discontinuation of at-mio-16e-10 rev. c
	   321808a.pdf  about at-mio-16e-10 rev P
	   321837a.pdf  discontinuation of at-mio-16de-10 rev d
	   321838a.pdf  about at-mio-16de-10 rev N

	ISSUES:

*/

/* #define USE_KMALLOC */

#include "mite.h"

#include "comedi_fc.h"
#include "comedi_pci.h"
#include "../comedidev.h"

#include <asm/system.h>

#define PCI_MITE_SIZE		4096
#define PCI_DAQ_SIZE		4096
#define PCI_DAQ_SIZE_660X       8192

MODULE_LICENSE("GPL");

struct mite_struct *mite_devices;

#define TOP_OF_PAGE(x) ((x)|(~(PAGE_MASK)))

void mite_init(void)
{
	struct pci_dev *pcidev;
	struct mite_struct *mite;

	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
		pcidev != NULL;
		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
		if (pcidev->vendor == PCI_VENDOR_ID_NATINST) {
			unsigned i;

			mite = kzalloc(sizeof(*mite), GFP_KERNEL);
			if (!mite) {
				printk("mite: allocation failed\n");
				pci_dev_put(pcidev);
				return;
			}
			spin_lock_init(&mite->lock);
			mite->pcidev = pci_dev_get(pcidev);
			for (i = 0; i < MAX_MITE_DMA_CHANNELS; ++i) {
				mite->channels[i].mite = mite;
				mite->channels[i].channel = i;
				mite->channels[i].done = 1;
			}
			mite->next = mite_devices;
			mite_devices = mite;
		}
	}
}

static void dump_chip_signature(u32 csigr_bits)
{
	printk("mite: version = %i, type = %i, mite mode = %i, interface mode = %i\n", mite_csigr_version(csigr_bits), mite_csigr_type(csigr_bits), mite_csigr_mmode(csigr_bits), mite_csigr_imode(csigr_bits));
	printk("mite: num channels = %i, write post fifo depth = %i, wins = %i, iowins = %i\n", mite_csigr_dmac(csigr_bits), mite_csigr_wpdep(csigr_bits), mite_csigr_wins(csigr_bits), mite_csigr_iowins(csigr_bits));
}

unsigned mite_fifo_size(struct mite_struct *mite, unsigned channel)
{
	unsigned fcr_bits = readl(mite->mite_io_addr +
		MITE_FCR(channel));
	unsigned empty_count = (fcr_bits >> 16) & 0xff;
	unsigned full_count = fcr_bits & 0xff;
	return empty_count + full_count;
}

int mite_setup2(struct mite_struct *mite, unsigned use_iodwbsr_1)
{
	unsigned long length;
	resource_size_t addr;
	int i;
	u32 csigr_bits;
	unsigned unknown_dma_burst_bits;

	if (comedi_pci_enable(mite->pcidev, "mite")) {
		printk("error enabling mite and requesting io regions\n");
		return -EIO;
	}
	pci_set_master(mite->pcidev);

	addr = pci_resource_start(mite->pcidev, 0);
	mite->mite_phys_addr = addr;
	mite->mite_io_addr = ioremap(addr, PCI_MITE_SIZE);
	if (!mite->mite_io_addr) {
		printk("failed to remap mite io memory address\n");
		return -ENOMEM;
	}
	printk("MITE:0x%08llx mapped to %p ",
		(unsigned long long)mite->mite_phys_addr, mite->mite_io_addr);

	addr = pci_resource_start(mite->pcidev, 1);
	mite->daq_phys_addr = addr;
	length = pci_resource_len(mite->pcidev, 1);
	/*  In case of a 660x board, DAQ size is 8k instead of 4k (see as shown by lspci output) */
	mite->daq_io_addr = ioremap(mite->daq_phys_addr, length);
	if (!mite->daq_io_addr) {
		printk("failed to remap daq io memory address\n");
		return -ENOMEM;
	}
	printk("DAQ:0x%08llx mapped to %p\n",
		(unsigned long long)mite->daq_phys_addr, mite->daq_io_addr);

	if (use_iodwbsr_1) {
		writel(0, mite->mite_io_addr + MITE_IODWBSR);
		printk("mite: using I/O Window Base Size register 1\n");
		writel(mite->
			daq_phys_addr | WENAB |
			MITE_IODWBSR_1_WSIZE_bits(length),
			mite->mite_io_addr + MITE_IODWBSR_1);
		writel(0, mite->mite_io_addr + MITE_IODWCR_1);
	} else {
		writel(mite->daq_phys_addr | WENAB,
			mite->mite_io_addr + MITE_IODWBSR);
	}
	/* make sure dma bursts work.  I got this from running a bus analyzer
	   on a pxi-6281 and a pxi-6713.  6713 powered up with register value
	   of 0x61f and bursts worked.  6281 powered up with register value of
	   0x1f and bursts didn't work.  The NI windows driver reads the register,
	   then does a bitwise-or of 0x600 with it and writes it back.
	 */
	unknown_dma_burst_bits =
		readl(mite->mite_io_addr + MITE_UNKNOWN_DMA_BURST_REG);
	unknown_dma_burst_bits |= UNKNOWN_DMA_BURST_ENABLE_BITS;
	writel(unknown_dma_burst_bits,
		mite->mite_io_addr + MITE_UNKNOWN_DMA_BURST_REG);

	csigr_bits = readl(mite->mite_io_addr + MITE_CSIGR);
	mite->num_channels = mite_csigr_dmac(csigr_bits);
	if (mite->num_channels > MAX_MITE_DMA_CHANNELS) {
		printk("mite: bug? chip claims to have %i dma channels.  Setting to %i.\n", mite->num_channels, MAX_MITE_DMA_CHANNELS);
		mite->num_channels = MAX_MITE_DMA_CHANNELS;
	}
	dump_chip_signature(csigr_bits);
	for (i = 0; i < mite->num_channels; i++) {
		writel(CHOR_DMARESET, mite->mite_io_addr + MITE_CHOR(i));
		/* disable interrupts */
		writel(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE | CHCR_CLR_SAR_IE |
			CHCR_CLR_DONE_IE | CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
			CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE,
			mite->mite_io_addr + MITE_CHCR(i));
	}
	mite->fifo_size = mite_fifo_size(mite, 0);
	printk("mite: fifo size is %i.\n", mite->fifo_size);
	mite->used = 1;

	return 0;
}

int mite_setup(struct mite_struct *mite)
{
	return mite_setup2(mite, 0);
}

void mite_cleanup(void)
{
	struct mite_struct *mite, *next;

	for (mite = mite_devices; mite; mite = next) {
		pci_dev_put(mite->pcidev);
		next = mite->next;
		kfree(mite);
	}
}

void mite_unsetup(struct mite_struct *mite)
{
	/* unsigned long offset, start, length; */

	if (!mite)
		return;

	if (mite->mite_io_addr) {
		iounmap(mite->mite_io_addr);
		mite->mite_io_addr = NULL;
	}
	if (mite->daq_io_addr) {
		iounmap(mite->daq_io_addr);
		mite->daq_io_addr = NULL;
	}
	if (mite->mite_phys_addr) {
		comedi_pci_disable(mite->pcidev);
		mite->mite_phys_addr = 0;
	}

	mite->used = 0;
}

void mite_list_devices(void)
{
	struct mite_struct *mite, *next;

	printk("Available NI device IDs:");
	if (mite_devices)
		for (mite = mite_devices; mite; mite = next) {
			next = mite->next;
			printk(" 0x%04x", mite_device_id(mite));
			if (mite->used)
				printk("(used)");
		}
	printk("\n");

}

struct mite_channel *mite_request_channel_in_range(struct mite_struct *mite,
	struct mite_dma_descriptor_ring *ring, unsigned min_channel,
	unsigned max_channel)
{
	int i;
	unsigned long flags;
	struct mite_channel *channel = NULL;

	/*  spin lock so mite_release_channel can be called safely from interrupts */
	spin_lock_irqsave(&mite->lock, flags);
	for (i = min_channel; i <= max_channel; ++i) {
		if (mite->channel_allocated[i] == 0) {
			mite->channel_allocated[i] = 1;
			channel = &mite->channels[i];
			channel->ring = ring;
			break;
		}
	}
	spin_unlock_irqrestore(&mite->lock, flags);
	return channel;
}

void mite_release_channel(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	unsigned long flags;

	/*  spin lock to prevent races with mite_request_channel */
	spin_lock_irqsave(&mite->lock, flags);
	if (mite->channel_allocated[mite_chan->channel]) {
		mite_dma_disarm(mite_chan);
		mite_dma_reset(mite_chan);
/* disable all channel's interrupts (do it after disarm/reset so
MITE_CHCR reg isn't changed while dma is still active!) */
		writel(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE |
			CHCR_CLR_SAR_IE | CHCR_CLR_DONE_IE |
			CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
			CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE,
			mite->mite_io_addr + MITE_CHCR(mite_chan->channel));
		mite->channel_allocated[mite_chan->channel] = 0;
		mite_chan->ring = NULL;
		mmiowb();
	}
	spin_unlock_irqrestore(&mite->lock, flags);
}

void mite_dma_arm(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	int chor;
	unsigned long flags;

	MDPRINTK("mite_dma_arm ch%i\n", channel);
	/* memory barrier is intended to insure any twiddling with the buffer
	   is done before writing to the mite to arm dma transfer */
	smp_mb();
	/* arm */
	chor = CHOR_START;
	spin_lock_irqsave(&mite->lock, flags);
	mite_chan->done = 0;
	writel(chor, mite->mite_io_addr + MITE_CHOR(mite_chan->channel));
	mmiowb();
	spin_unlock_irqrestore(&mite->lock, flags);
/*       mite_dma_tcr(mite, channel); */
}

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

int mite_buf_change(struct mite_dma_descriptor_ring *ring, struct comedi_async * async)
{
	unsigned int n_links;
	int i;

	if (ring->descriptors) {
		dma_free_coherent(ring->hw_dev,
			ring->n_links * sizeof(struct mite_dma_descriptor),
			ring->descriptors, ring->descriptors_dma_addr);
	}
	ring->descriptors = NULL;
	ring->descriptors_dma_addr = 0;
	ring->n_links = 0;

	if (async->prealloc_bufsz == 0)
		return 0;

	n_links = async->prealloc_bufsz >> PAGE_SHIFT;

	MDPRINTK("ring->hw_dev=%p, n_links=0x%04x\n", ring->hw_dev, n_links);

	ring->descriptors =
		dma_alloc_coherent(ring->hw_dev,
		n_links * sizeof(struct mite_dma_descriptor),
		&ring->descriptors_dma_addr, GFP_KERNEL);
	if (!ring->descriptors) {
		printk("mite: ring buffer allocation failed\n");
		return -ENOMEM;
	}
	ring->n_links = n_links;

	for (i = 0; i < n_links; i++) {
		ring->descriptors[i].count = cpu_to_le32(PAGE_SIZE);
		ring->descriptors[i].addr =
			cpu_to_le32(async->buf_page_list[i].dma_addr);
		ring->descriptors[i].next =
			cpu_to_le32(ring->descriptors_dma_addr + (i +
				1) * sizeof(struct mite_dma_descriptor));
	}
	ring->descriptors[n_links - 1].next =
		cpu_to_le32(ring->descriptors_dma_addr);
	/* barrier is meant to insure that all the writes to the dma descriptors
	   have completed before the dma controller is commanded to read them */
	smp_wmb();
	return 0;
}

void mite_prep_dma(struct mite_channel *mite_chan,
	unsigned int num_device_bits, unsigned int num_memory_bits)
{
	unsigned int chor, chcr, mcr, dcr, lkcr;
	struct mite_struct *mite = mite_chan->mite;

	MDPRINTK("mite_prep_dma ch%i\n", mite_chan->channel);

	/* reset DMA and FIFO */
	chor = CHOR_DMARESET | CHOR_FRESET;
	writel(chor, mite->mite_io_addr + MITE_CHOR(mite_chan->channel));

	/* short link chaining mode */
	chcr = CHCR_SET_DMA_IE | CHCR_LINKSHORT | CHCR_SET_DONE_IE |
		CHCR_BURSTEN;
	/*
	 * Link Complete Interrupt: interrupt every time a link
	 * in MITE_RING is completed. This can generate a lot of
	 * extra interrupts, but right now we update the values
	 * of buf_int_ptr and buf_int_count at each interrupt.  A
	 * better method is to poll the MITE before each user
	 * "read()" to calculate the number of bytes available.
	 */
	chcr |= CHCR_SET_LC_IE;
	if (num_memory_bits == 32 && num_device_bits == 16) {
		/* Doing a combined 32 and 16 bit byteswap gets the 16 bit samples into the fifo in the right order.
		   Tested doing 32 bit memory to 16 bit device transfers to the analog out of a pxi-6281,
		   which has mite version = 1, type = 4.  This also works for dma reads from the counters
		   on e-series boards.  */
		chcr |= CHCR_BYTE_SWAP_DEVICE | CHCR_BYTE_SWAP_MEMORY;
	}
	if (mite_chan->dir == COMEDI_INPUT)
		chcr |= CHCR_DEV_TO_MEM;

	writel(chcr, mite->mite_io_addr + MITE_CHCR(mite_chan->channel));

	/* to/from memory */
	mcr = CR_RL(64) | CR_ASEQUP;
	switch (num_memory_bits) {
	case 8:
		mcr |= CR_PSIZE8;
		break;
	case 16:
		mcr |= CR_PSIZE16;
		break;
	case 32:
		mcr |= CR_PSIZE32;
		break;
	default:
		printk
			("mite: bug! invalid mem bit width for dma transfer\n");
		break;
	}
	writel(mcr, mite->mite_io_addr + MITE_MCR(mite_chan->channel));

	/* from/to device */
	dcr = CR_RL(64) | CR_ASEQUP;
	dcr |= CR_PORTIO | CR_AMDEVICE | CR_REQSDRQ(mite_chan->channel);
	switch (num_device_bits) {
	case 8:
		dcr |= CR_PSIZE8;
		break;
	case 16:
		dcr |= CR_PSIZE16;
		break;
	case 32:
		dcr |= CR_PSIZE32;
		break;
	default:
		printk
			("mite: bug! invalid dev bit width for dma transfer\n");
		break;
	}
	writel(dcr, mite->mite_io_addr + MITE_DCR(mite_chan->channel));

	/* reset the DAR */
	writel(0, mite->mite_io_addr + MITE_DAR(mite_chan->channel));

	/* the link is 32bits */
	lkcr = CR_RL(64) | CR_ASEQUP | CR_PSIZE32;
	writel(lkcr, mite->mite_io_addr + MITE_LKCR(mite_chan->channel));

	/* starting address for link chaining */
	writel(mite_chan->ring->descriptors_dma_addr,
		mite->mite_io_addr + MITE_LKAR(mite_chan->channel));

	MDPRINTK("exit mite_prep_dma\n");
}

u32 mite_device_bytes_transferred(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	return readl(mite->mite_io_addr + MITE_DAR(mite_chan->channel));
}

u32 mite_bytes_in_transit(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	return readl(mite->mite_io_addr +
		MITE_FCR(mite_chan->channel)) & 0x000000FF;
}

/*  returns lower bound for number of bytes transferred from device to memory */
u32 mite_bytes_written_to_memory_lb(struct mite_channel *mite_chan)
{
	u32 device_byte_count;

	device_byte_count = mite_device_bytes_transferred(mite_chan);
	return device_byte_count - mite_bytes_in_transit(mite_chan);
}

/*  returns upper bound for number of bytes transferred from device to memory */
u32 mite_bytes_written_to_memory_ub(struct mite_channel *mite_chan)
{
	u32 in_transit_count;

	in_transit_count = mite_bytes_in_transit(mite_chan);
	return mite_device_bytes_transferred(mite_chan) - in_transit_count;
}

/*  returns lower bound for number of bytes read from memory for transfer to device */
u32 mite_bytes_read_from_memory_lb(struct mite_channel *mite_chan)
{
	u32 device_byte_count;

	device_byte_count = mite_device_bytes_transferred(mite_chan);
	return device_byte_count + mite_bytes_in_transit(mite_chan);
}

/*  returns upper bound for number of bytes read from memory for transfer to device */
u32 mite_bytes_read_from_memory_ub(struct mite_channel *mite_chan)
{
	u32 in_transit_count;

	in_transit_count = mite_bytes_in_transit(mite_chan);
	return mite_device_bytes_transferred(mite_chan) + in_transit_count;
}

unsigned mite_dma_tcr(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	int tcr;
	int lkar;

	lkar = readl(mite->mite_io_addr + MITE_LKAR(mite_chan->channel));
	tcr = readl(mite->mite_io_addr + MITE_TCR(mite_chan->channel));
	MDPRINTK("mite_dma_tcr ch%i, lkar=0x%08x tcr=%d\n", mite_chan->channel,
		lkar, tcr);

	return tcr;
}

void mite_dma_disarm(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	unsigned chor;

	/* disarm */
	chor = CHOR_ABORT;
	writel(chor, mite->mite_io_addr + MITE_CHOR(mite_chan->channel));
}

int mite_sync_input_dma(struct mite_channel *mite_chan, struct comedi_async * async)
{
	int count;
	unsigned int nbytes, old_alloc_count;
	const unsigned bytes_per_scan = cfc_bytes_per_scan(async->subdevice);

	old_alloc_count = async->buf_write_alloc_count;
	/*  write alloc as much as we can */
	comedi_buf_write_alloc(async, async->prealloc_bufsz);

	nbytes = mite_bytes_written_to_memory_lb(mite_chan);
	if ((int)(mite_bytes_written_to_memory_ub(mite_chan) -
			old_alloc_count) > 0) {
		printk("mite: DMA overwrite of free area\n");
		async->events |= COMEDI_CB_OVERFLOW;
		return -1;
	}

	count = nbytes - async->buf_write_count;
	/* it's possible count will be negative due to
	 * conservative value returned by mite_bytes_written_to_memory_lb */
	if (count <= 0)
		return 0;

	comedi_buf_write_free(async, count);

	async->scan_progress += count;
	if (async->scan_progress >= bytes_per_scan) {
		async->scan_progress %= bytes_per_scan;
		async->events |= COMEDI_CB_EOS;
	}
	async->events |= COMEDI_CB_BLOCK;
	return 0;
}

int mite_sync_output_dma(struct mite_channel *mite_chan, struct comedi_async * async)
{
	int count;
	u32 nbytes_ub, nbytes_lb;
	unsigned int old_alloc_count;
	u32 stop_count =
		async->cmd.stop_arg * cfc_bytes_per_scan(async->subdevice);

	old_alloc_count = async->buf_read_alloc_count;
	/*  read alloc as much as we can */
	comedi_buf_read_alloc(async, async->prealloc_bufsz);
	nbytes_lb = mite_bytes_read_from_memory_lb(mite_chan);
	if (async->cmd.stop_src == TRIG_COUNT &&
		(int)(nbytes_lb - stop_count) > 0)
		nbytes_lb = stop_count;
	nbytes_ub = mite_bytes_read_from_memory_ub(mite_chan);
	if (async->cmd.stop_src == TRIG_COUNT &&
		(int)(nbytes_ub - stop_count) > 0)
		nbytes_ub = stop_count;
	if ((int)(nbytes_ub - old_alloc_count) > 0) {
		printk("mite: DMA underrun\n");
		async->events |= COMEDI_CB_OVERFLOW;
		return -1;
	}
	count = nbytes_lb - async->buf_read_count;
	if (count <= 0)
		return 0;

	if (count) {
		comedi_buf_read_free(async, count);
		async->events |= COMEDI_CB_BLOCK;
	}
	return 0;
}

unsigned mite_get_status(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	unsigned status;
	unsigned long flags;

	spin_lock_irqsave(&mite->lock, flags);
	status = readl(mite->mite_io_addr + MITE_CHSR(mite_chan->channel));
	if (status & CHSR_DONE) {
		mite_chan->done = 1;
		writel(CHOR_CLRDONE,
			mite->mite_io_addr + MITE_CHOR(mite_chan->channel));
	}
	mmiowb();
	spin_unlock_irqrestore(&mite->lock, flags);
	return status;
}

int mite_done(struct mite_channel *mite_chan)
{
	struct mite_struct *mite = mite_chan->mite;
	unsigned long flags;
	int done;

	mite_get_status(mite_chan);
	spin_lock_irqsave(&mite->lock, flags);
	done = mite_chan->done;
	spin_unlock_irqrestore(&mite->lock, flags);
	return done;
}

#ifdef DEBUG_MITE

static void mite_decode(char **bit_str, unsigned int bits);

/* names of bits in mite registers */

static const char *const mite_CHOR_strings[] = {
	"start", "cont", "stop", "abort",
	"freset", "clrlc", "clrrb", "clrdone",
	"clr_lpause", "set_lpause", "clr_send_tc",
	"set_send_tc", "12", "13", "14",
	"15", "16", "17", "18",
	"19", "20", "21", "22",
	"23", "24", "25", "26",
	"27", "28", "29", "30",
	"dmareset",
};

static const char *const mite_CHCR_strings[] = {
	"continue", "ringbuff", "2", "3",
	"4", "5", "6", "7",
	"8", "9", "10", "11",
	"12", "13", "bursten", "fifodis",
	"clr_cont_rb_ie", "set_cont_rb_ie", "clr_lc_ie", "set_lc_ie",
	"clr_drdy_ie", "set_drdy_ie", "clr_mrdy_ie", "set_mrdy_ie",
	"clr_done_ie", "set_done_ie", "clr_sar_ie", "set_sar_ie",
	"clr_linkp_ie", "set_linkp_ie", "clr_dma_ie", "set_dma_ie",
};

static const char *const mite_MCR_strings[] = {
	"amdevice", "1", "2", "3",
	"4", "5", "portio", "portvxi",
	"psizebyte", "psizehalf (byte & half = word)", "aseqxp1", "11",
	"12", "13", "blocken", "berhand",
	"reqsintlim/reqs0", "reqs1", "reqs2", "rd32",
	"rd512", "rl1", "rl2", "rl8",
	"24", "25", "26", "27",
	"28", "29", "30", "stopen",
};

static const char *const mite_DCR_strings[] = {
	"amdevice", "1", "2", "3",
	"4", "5", "portio", "portvxi",
	"psizebyte", "psizehalf (byte & half = word)", "aseqxp1", "aseqxp2",
	"aseqxp8", "13", "blocken", "berhand",
	"reqsintlim", "reqs1", "reqs2", "rd32",
	"rd512", "rl1", "rl2", "rl8",
	"23", "24", "25", "27",
	"28", "wsdevc", "wsdevs", "rwdevpack",
};

static const char *const mite_LKCR_strings[] = {
	"amdevice", "1", "2", "3",
	"4", "5", "portio", "portvxi",
	"psizebyte", "psizehalf (byte & half = word)", "asequp", "aseqdown",
	"12", "13", "14", "berhand",
	"16", "17", "18", "rd32",
	"rd512", "rl1", "rl2", "rl8",
	"24", "25", "26", "27",
	"28", "29", "30", "chngend",
};

static const char *const mite_CHSR_strings[] = {
	"d.err0", "d.err1", "m.err0", "m.err1",
	"l.err0", "l.err1", "drq0", "drq1",
	"end", "xferr", "operr0", "operr1",
	"stops", "habort", "sabort", "error",
	"16", "conts_rb", "18", "linkc",
	"20", "drdy", "22", "mrdy",
	"24", "done", "26", "sars",
	"28", "lpauses", "30", "int",
};

void mite_dump_regs(struct mite_channel *mite_chan)
{
	unsigned long mite_io_addr =
		(unsigned long)mite_chan->mite->mite_io_addr;
	unsigned long addr = 0;
	unsigned long temp = 0;

	printk("mite_dump_regs ch%i\n", mite_chan->channel);
	printk("mite address is  =0x%08lx\n", mite_io_addr);

	addr = mite_io_addr + MITE_CHOR(channel);
	printk("mite status[CHOR]at 0x%08lx =0x%08lx\n", addr, temp =
		readl(addr));
	mite_decode(mite_CHOR_strings, temp);
	addr = mite_io_addr + MITE_CHCR(channel);
	printk("mite status[CHCR]at 0x%08lx =0x%08lx\n", addr, temp =
		readl(addr));
	mite_decode(mite_CHCR_strings, temp);
	addr = mite_io_addr + MITE_TCR(channel);
	printk("mite status[TCR] at 0x%08lx =0x%08x\n", addr, readl(addr));
	addr = mite_io_addr + MITE_MCR(channel);
	printk("mite status[MCR] at 0x%08lx =0x%08lx\n", addr, temp =
		readl(addr));
	mite_decode(mite_MCR_strings, temp);

	addr = mite_io_addr + MITE_MAR(channel);
	printk("mite status[MAR] at 0x%08lx =0x%08x\n", addr, readl(addr));
	addr = mite_io_addr + MITE_DCR(channel);
	printk("mite status[DCR] at 0x%08lx =0x%08lx\n", addr, temp =
		readl(addr));
	mite_decode(mite_DCR_strings, temp);
	addr = mite_io_addr + MITE_DAR(channel);
	printk("mite status[DAR] at 0x%08lx =0x%08x\n", addr, readl(addr));
	addr = mite_io_addr + MITE_LKCR(channel);
	printk("mite status[LKCR]at 0x%08lx =0x%08lx\n", addr, temp =
		readl(addr));
	mite_decode(mite_LKCR_strings, temp);
	addr = mite_io_addr + MITE_LKAR(channel);
	printk("mite status[LKAR]at 0x%08lx =0x%08x\n", addr, readl(addr));

	addr = mite_io_addr + MITE_CHSR(channel);
	printk("mite status[CHSR]at 0x%08lx =0x%08lx\n", addr, temp =
		readl(addr));
	mite_decode(mite_CHSR_strings, temp);
	addr = mite_io_addr + MITE_FCR(channel);
	printk("mite status[FCR] at 0x%08lx =0x%08x\n\n", addr, readl(addr));
}

static void mite_decode(char **bit_str, unsigned int bits)
{
	int i;

	for (i = 31; i >= 0; i--) {
		if (bits & (1 << i))
			printk(" %s", bit_str[i]);
	}
	printk("\n");
}
#endif

#ifdef MODULE
int __init init_module(void)
{
	mite_init();
	mite_list_devices();

	return 0;
}

void __exit cleanup_module(void)
{
	mite_cleanup();
}

EXPORT_SYMBOL(mite_dma_tcr);
EXPORT_SYMBOL(mite_dma_arm);
EXPORT_SYMBOL(mite_dma_disarm);
EXPORT_SYMBOL(mite_sync_input_dma);
EXPORT_SYMBOL(mite_sync_output_dma);
EXPORT_SYMBOL(mite_setup);
EXPORT_SYMBOL(mite_setup2);
EXPORT_SYMBOL(mite_unsetup);
#if 0
EXPORT_SYMBOL(mite_kvmem_segment_load);
EXPORT_SYMBOL(mite_ll_from_kvmem);
EXPORT_SYMBOL(mite_setregs);
#endif
EXPORT_SYMBOL(mite_devices);
EXPORT_SYMBOL(mite_list_devices);
EXPORT_SYMBOL(mite_request_channel_in_range);
EXPORT_SYMBOL(mite_release_channel);
EXPORT_SYMBOL(mite_prep_dma);
EXPORT_SYMBOL(mite_buf_change);
EXPORT_SYMBOL(mite_bytes_written_to_memory_lb);
EXPORT_SYMBOL(mite_bytes_written_to_memory_ub);
EXPORT_SYMBOL(mite_bytes_read_from_memory_lb);
EXPORT_SYMBOL(mite_bytes_read_from_memory_ub);
EXPORT_SYMBOL(mite_bytes_in_transit);
EXPORT_SYMBOL(mite_get_status);
EXPORT_SYMBOL(mite_done);
#ifdef DEBUG_MITE
EXPORT_SYMBOL(mite_decode);
EXPORT_SYMBOL(mite_dump_regs);
#endif

#endif