Staging: comedi: add mite comedi pci driver
Hardware driver for NI Mite PCI interface chip From: David Schleef <ds@schleef.org> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Schleef
Greg Kroah-Hartman
parent
a9f23e00c1
commit
bede729096
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@ -3,3 +3,6 @@
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# Comedi "helper" modules
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# Comedi "helper" modules
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obj-$(CONFIG_COMEDI) += comedi_fc.o
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obj-$(CONFIG_COMEDI) += comedi_fc.o
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# Comedi PCI drivers
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obj-$(CONFIG_COMEDI_PCI_DRIVERS) += mite.o
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@ -0,0 +1,809 @@
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/*
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comedi/drivers/mite.c
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Hardware driver for NI Mite PCI interface chip
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1997-2002 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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The PCI-MIO E series driver was originally written by
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Tomasz Motylewski <...>, and ported to comedi by ds.
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References for specifications:
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321747b.pdf Register Level Programmer Manual (obsolete)
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321747c.pdf Register Level Programmer Manual (new)
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DAQ-STC reference manual
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Other possibly relevant info:
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320517c.pdf User manual (obsolete)
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320517f.pdf User manual (new)
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320889a.pdf delete
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320906c.pdf maximum signal ratings
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321066a.pdf about 16x
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321791a.pdf discontinuation of at-mio-16e-10 rev. c
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321808a.pdf about at-mio-16e-10 rev P
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321837a.pdf discontinuation of at-mio-16de-10 rev d
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321838a.pdf about at-mio-16de-10 rev N
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ISSUES:
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*/
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//#define USE_KMALLOC
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#include "mite.h"
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#include "comedi_fc.h"
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#include "comedi_pci.h"
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#include "../comedidev.h"
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#include <asm/system.h>
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#define PCI_MITE_SIZE 4096
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#define PCI_DAQ_SIZE 4096
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#define PCI_DAQ_SIZE_660X 8192
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MODULE_LICENSE("GPL");
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struct mite_struct *mite_devices = NULL;
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#define TOP_OF_PAGE(x) ((x)|(~(PAGE_MASK)))
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void mite_init(void)
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{
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struct pci_dev *pcidev;
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struct mite_struct *mite;
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for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
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pcidev != NULL;
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pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
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if (pcidev->vendor == PCI_VENDOR_ID_NATINST) {
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unsigned i;
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mite = kzalloc(sizeof(*mite), GFP_KERNEL);
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if (!mite) {
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printk("mite: allocation failed\n");
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pci_dev_put(pcidev);
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return;
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}
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spin_lock_init(&mite->lock);
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mite->pcidev = pci_dev_get(pcidev);
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for (i = 0; i < MAX_MITE_DMA_CHANNELS; ++i) {
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mite->channels[i].mite = mite;
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mite->channels[i].channel = i;
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mite->channels[i].done = 1;
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}
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mite->next = mite_devices;
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mite_devices = mite;
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}
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}
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}
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static void dump_chip_signature(u32 csigr_bits)
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{
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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));
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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));
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}
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unsigned mite_fifo_size(struct mite_struct * mite, unsigned channel)
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{
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unsigned fcr_bits = readl(mite->mite_io_addr +
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MITE_FCR(channel));
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unsigned empty_count = (fcr_bits >> 16) & 0xff;
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unsigned full_count = fcr_bits & 0xff;
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return empty_count + full_count;
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}
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int mite_setup2(struct mite_struct *mite, unsigned use_iodwbsr_1)
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{
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unsigned long length;
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resource_size_t addr;
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int i;
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u32 csigr_bits;
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unsigned unknown_dma_burst_bits;
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if (comedi_pci_enable(mite->pcidev, "mite")) {
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printk("error enabling mite and requesting io regions\n");
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return -EIO;
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}
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pci_set_master(mite->pcidev);
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addr = pci_resource_start(mite->pcidev, 0);
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mite->mite_phys_addr = addr;
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mite->mite_io_addr = ioremap(addr, PCI_MITE_SIZE);
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if (!mite->mite_io_addr) {
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printk("failed to remap mite io memory address\n");
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return -ENOMEM;
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}
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printk("MITE:0x%08llx mapped to %p ",
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(unsigned long long)mite->mite_phys_addr, mite->mite_io_addr);
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addr = pci_resource_start(mite->pcidev, 1);
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mite->daq_phys_addr = addr;
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length = pci_resource_len(mite->pcidev, 1);
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// In case of a 660x board, DAQ size is 8k instead of 4k (see as shown by lspci output)
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mite->daq_io_addr = ioremap(mite->daq_phys_addr, length);
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if (!mite->daq_io_addr) {
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printk("failed to remap daq io memory address\n");
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return -ENOMEM;
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}
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printk("DAQ:0x%08llx mapped to %p\n",
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(unsigned long long)mite->daq_phys_addr, mite->daq_io_addr);
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if (use_iodwbsr_1) {
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writel(0, mite->mite_io_addr + MITE_IODWBSR);
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printk("mite: using I/O Window Base Size register 1\n");
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writel(mite->
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daq_phys_addr | WENAB |
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MITE_IODWBSR_1_WSIZE_bits(length),
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mite->mite_io_addr + MITE_IODWBSR_1);
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writel(0, mite->mite_io_addr + MITE_IODWCR_1);
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} else {
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writel(mite->daq_phys_addr | WENAB,
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mite->mite_io_addr + MITE_IODWBSR);
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}
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/* make sure dma bursts work. I got this from running a bus analyzer
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on a pxi-6281 and a pxi-6713. 6713 powered up with register value
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of 0x61f and bursts worked. 6281 powered up with register value of
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0x1f and bursts didn't work. The NI windows driver reads the register,
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then does a bitwise-or of 0x600 with it and writes it back.
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*/
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unknown_dma_burst_bits =
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readl(mite->mite_io_addr + MITE_UNKNOWN_DMA_BURST_REG);
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unknown_dma_burst_bits |= UNKNOWN_DMA_BURST_ENABLE_BITS;
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writel(unknown_dma_burst_bits,
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mite->mite_io_addr + MITE_UNKNOWN_DMA_BURST_REG);
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csigr_bits = readl(mite->mite_io_addr + MITE_CSIGR);
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mite->num_channels = mite_csigr_dmac(csigr_bits);
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if (mite->num_channels > MAX_MITE_DMA_CHANNELS) {
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printk("mite: bug? chip claims to have %i dma channels. Setting to %i.\n", mite->num_channels, MAX_MITE_DMA_CHANNELS);
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mite->num_channels = MAX_MITE_DMA_CHANNELS;
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}
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dump_chip_signature(csigr_bits);
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for (i = 0; i < mite->num_channels; i++) {
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writel(CHOR_DMARESET, mite->mite_io_addr + MITE_CHOR(i));
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/* disable interrupts */
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writel(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE | CHCR_CLR_SAR_IE |
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CHCR_CLR_DONE_IE | CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
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CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE,
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mite->mite_io_addr + MITE_CHCR(i));
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}
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mite->fifo_size = mite_fifo_size(mite, 0);
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printk("mite: fifo size is %i.\n", mite->fifo_size);
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mite->used = 1;
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return 0;
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}
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int mite_setup(struct mite_struct *mite)
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{
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return mite_setup2(mite, 0);
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}
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void mite_cleanup(void)
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{
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struct mite_struct *mite, *next;
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for (mite = mite_devices; mite; mite = next) {
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pci_dev_put(mite->pcidev);
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next = mite->next;
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kfree(mite);
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}
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}
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void mite_unsetup(struct mite_struct *mite)
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{
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//unsigned long offset, start, length;
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if (!mite)
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return;
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if (mite->mite_io_addr) {
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iounmap(mite->mite_io_addr);
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mite->mite_io_addr = NULL;
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}
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if (mite->daq_io_addr) {
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iounmap(mite->daq_io_addr);
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mite->daq_io_addr = NULL;
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}
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if (mite->mite_phys_addr) {
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comedi_pci_disable(mite->pcidev);
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mite->mite_phys_addr = 0;
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}
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mite->used = 0;
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}
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void mite_list_devices(void)
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{
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struct mite_struct *mite, *next;
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printk("Available NI device IDs:");
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if (mite_devices)
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for (mite = mite_devices; mite; mite = next) {
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next = mite->next;
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printk(" 0x%04x", mite_device_id(mite));
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if (mite->used)
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printk("(used)");
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}
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printk("\n");
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}
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struct mite_channel *mite_request_channel_in_range(struct mite_struct *mite,
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struct mite_dma_descriptor_ring *ring, unsigned min_channel,
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unsigned max_channel)
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{
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int i;
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unsigned long flags;
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struct mite_channel *channel = NULL;
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// spin lock so mite_release_channel can be called safely from interrupts
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comedi_spin_lock_irqsave(&mite->lock, flags);
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for (i = min_channel; i <= max_channel; ++i) {
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if (mite->channel_allocated[i] == 0) {
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mite->channel_allocated[i] = 1;
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channel = &mite->channels[i];
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channel->ring = ring;
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break;
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}
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}
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comedi_spin_unlock_irqrestore(&mite->lock, flags);
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return channel;
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}
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void mite_release_channel(struct mite_channel *mite_chan)
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{
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struct mite_struct *mite = mite_chan->mite;
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unsigned long flags;
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// spin lock to prevent races with mite_request_channel
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comedi_spin_lock_irqsave(&mite->lock, flags);
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if (mite->channel_allocated[mite_chan->channel]) {
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mite_dma_disarm(mite_chan);
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mite_dma_reset(mite_chan);
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/* disable all channel's interrupts (do it after disarm/reset so
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MITE_CHCR reg isn't changed while dma is still active!) */
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writel(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE |
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CHCR_CLR_SAR_IE | CHCR_CLR_DONE_IE |
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CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
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CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE,
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mite->mite_io_addr + MITE_CHCR(mite_chan->channel));
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mite->channel_allocated[mite_chan->channel] = 0;
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mite_chan->ring = NULL;
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mmiowb();
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}
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comedi_spin_unlock_irqrestore(&mite->lock, flags);
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}
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void mite_dma_arm(struct mite_channel *mite_chan)
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{
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struct mite_struct *mite = mite_chan->mite;
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int chor;
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unsigned long flags;
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MDPRINTK("mite_dma_arm ch%i\n", channel);
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/* memory barrier is intended to insure any twiddling with the buffer
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is done before writing to the mite to arm dma transfer */
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smp_mb();
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/* arm */
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chor = CHOR_START;
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comedi_spin_lock_irqsave(&mite->lock, flags);
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mite_chan->done = 0;
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writel(chor, mite->mite_io_addr + MITE_CHOR(mite_chan->channel));
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mmiowb();
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comedi_spin_unlock_irqrestore(&mite->lock, flags);
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// mite_dma_tcr(mite, channel);
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}
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/**************************************/
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int mite_buf_change(struct mite_dma_descriptor_ring *ring, comedi_async * async)
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{
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unsigned int n_links;
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int i;
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if (ring->descriptors) {
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dma_free_coherent(ring->hw_dev,
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ring->n_links * sizeof(struct mite_dma_descriptor),
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ring->descriptors, ring->descriptors_dma_addr);
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}
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ring->descriptors = NULL;
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ring->descriptors_dma_addr = 0;
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ring->n_links = 0;
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if (async->prealloc_bufsz == 0) {
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return 0;
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}
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n_links = async->prealloc_bufsz >> PAGE_SHIFT;
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MDPRINTK("ring->hw_dev=%p, n_links=0x%04x\n", ring->hw_dev, n_links);
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ring->descriptors =
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dma_alloc_coherent(ring->hw_dev,
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n_links * sizeof(struct mite_dma_descriptor),
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|
&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:
|
||||||
|
rt_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:
|
||||||
|
rt_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, 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) {
|
||||||
|
rt_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, 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) {
|
||||||
|
rt_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;
|
||||||
|
|
||||||
|
comedi_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();
|
||||||
|
comedi_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);
|
||||||
|
comedi_spin_lock_irqsave(&mite->lock, flags);
|
||||||
|
done = mite_chan->done;
|
||||||
|
comedi_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
|
||||||
|
|
@ -0,0 +1,453 @@
|
||||||
|
/*
|
||||||
|
module/mite.h
|
||||||
|
Hardware driver for NI Mite PCI interface chip
|
||||||
|
|
||||||
|
COMEDI - Linux Control and Measurement Device Interface
|
||||||
|
Copyright (C) 1999 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.
|
||||||
|
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _MITE_H_
|
||||||
|
#define _MITE_H_
|
||||||
|
|
||||||
|
#include "../comedidev.h"
|
||||||
|
#include "../pci.h"
|
||||||
|
|
||||||
|
#define PCI_VENDOR_ID_NATINST 0x1093
|
||||||
|
|
||||||
|
// #define DEBUG_MITE
|
||||||
|
#define PCIMIO_COMPAT
|
||||||
|
|
||||||
|
#ifdef DEBUG_MITE
|
||||||
|
#define MDPRINTK(format,args...) printk(format , ## args )
|
||||||
|
#else
|
||||||
|
#define MDPRINTK(format,args...)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define MAX_MITE_DMA_CHANNELS 8
|
||||||
|
|
||||||
|
struct mite_dma_descriptor {
|
||||||
|
u32 count;
|
||||||
|
u32 addr;
|
||||||
|
u32 next;
|
||||||
|
u32 dar;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct mite_dma_descriptor_ring {
|
||||||
|
struct device *hw_dev;
|
||||||
|
unsigned int n_links;
|
||||||
|
struct mite_dma_descriptor *descriptors;
|
||||||
|
dma_addr_t descriptors_dma_addr;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct mite_channel {
|
||||||
|
struct mite_struct *mite;
|
||||||
|
unsigned channel;
|
||||||
|
int dir;
|
||||||
|
int done;
|
||||||
|
struct mite_dma_descriptor_ring *ring;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct mite_struct {
|
||||||
|
struct mite_struct *next;
|
||||||
|
int used;
|
||||||
|
|
||||||
|
struct pci_dev *pcidev;
|
||||||
|
resource_size_t mite_phys_addr;
|
||||||
|
void *mite_io_addr;
|
||||||
|
resource_size_t daq_phys_addr;
|
||||||
|
void *daq_io_addr;
|
||||||
|
|
||||||
|
struct mite_channel channels[MAX_MITE_DMA_CHANNELS];
|
||||||
|
short channel_allocated[MAX_MITE_DMA_CHANNELS];
|
||||||
|
int num_channels;
|
||||||
|
unsigned fifo_size;
|
||||||
|
spinlock_t lock;
|
||||||
|
};
|
||||||
|
|
||||||
|
static inline struct mite_dma_descriptor_ring *mite_alloc_ring(struct
|
||||||
|
mite_struct *mite)
|
||||||
|
{
|
||||||
|
struct mite_dma_descriptor_ring *ring =
|
||||||
|
kmalloc(sizeof(struct mite_dma_descriptor_ring), GFP_KERNEL);
|
||||||
|
if (ring == NULL)
|
||||||
|
return ring;
|
||||||
|
ring->hw_dev = get_device(&mite->pcidev->dev);
|
||||||
|
if (ring->hw_dev == NULL) {
|
||||||
|
kfree(ring);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
ring->n_links = 0;
|
||||||
|
ring->descriptors = NULL;
|
||||||
|
ring->descriptors_dma_addr = 0;
|
||||||
|
return ring;
|
||||||
|
};
|
||||||
|
|
||||||
|
static inline void mite_free_ring(struct mite_dma_descriptor_ring *ring)
|
||||||
|
{
|
||||||
|
if (ring) {
|
||||||
|
if (ring->descriptors) {
|
||||||
|
dma_free_coherent(ring->hw_dev,
|
||||||
|
ring->n_links *
|
||||||
|
sizeof(struct mite_dma_descriptor),
|
||||||
|
ring->descriptors, ring->descriptors_dma_addr);
|
||||||
|
}
|
||||||
|
put_device(ring->hw_dev);
|
||||||
|
kfree(ring);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
extern struct mite_struct *mite_devices;
|
||||||
|
|
||||||
|
static inline unsigned int mite_irq(struct mite_struct *mite)
|
||||||
|
{
|
||||||
|
return mite->pcidev->irq;
|
||||||
|
};
|
||||||
|
static inline unsigned int mite_device_id(struct mite_struct *mite)
|
||||||
|
{
|
||||||
|
return mite->pcidev->device;
|
||||||
|
};
|
||||||
|
|
||||||
|
void mite_init(void);
|
||||||
|
void mite_cleanup(void);
|
||||||
|
int mite_setup(struct mite_struct *mite);
|
||||||
|
int mite_setup2(struct mite_struct *mite, unsigned use_iodwbsr_1);
|
||||||
|
void mite_unsetup(struct mite_struct *mite);
|
||||||
|
void mite_list_devices(void);
|
||||||
|
struct mite_channel *mite_request_channel_in_range(struct mite_struct *mite,
|
||||||
|
struct mite_dma_descriptor_ring *ring, unsigned min_channel,
|
||||||
|
unsigned max_channel);
|
||||||
|
static inline struct mite_channel *mite_request_channel(struct mite_struct
|
||||||
|
*mite, struct mite_dma_descriptor_ring *ring)
|
||||||
|
{
|
||||||
|
return mite_request_channel_in_range(mite, ring, 0,
|
||||||
|
mite->num_channels - 1);
|
||||||
|
}
|
||||||
|
void mite_release_channel(struct mite_channel *mite_chan);
|
||||||
|
|
||||||
|
unsigned mite_dma_tcr(struct mite_channel *mite_chan);
|
||||||
|
void mite_dma_arm(struct mite_channel *mite_chan);
|
||||||
|
void mite_dma_disarm(struct mite_channel *mite_chan);
|
||||||
|
int mite_sync_input_dma(struct mite_channel *mite_chan, comedi_async * async);
|
||||||
|
int mite_sync_output_dma(struct mite_channel *mite_chan, comedi_async * async);
|
||||||
|
u32 mite_bytes_written_to_memory_lb(struct mite_channel *mite_chan);
|
||||||
|
u32 mite_bytes_written_to_memory_ub(struct mite_channel *mite_chan);
|
||||||
|
u32 mite_bytes_read_from_memory_lb(struct mite_channel *mite_chan);
|
||||||
|
u32 mite_bytes_read_from_memory_ub(struct mite_channel *mite_chan);
|
||||||
|
u32 mite_bytes_in_transit(struct mite_channel *mite_chan);
|
||||||
|
unsigned mite_get_status(struct mite_channel *mite_chan);
|
||||||
|
int mite_done(struct mite_channel *mite_chan);
|
||||||
|
|
||||||
|
#if 0
|
||||||
|
unsigned long mite_ll_from_kvmem(struct mite_struct *mite, comedi_async * async,
|
||||||
|
int len);
|
||||||
|
void mite_setregs(struct mite_struct *mite, unsigned long ll_start, int chan,
|
||||||
|
int dir);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
void mite_prep_dma(struct mite_channel *mite_chan,
|
||||||
|
unsigned int num_device_bits, unsigned int num_memory_bits);
|
||||||
|
int mite_buf_change(struct mite_dma_descriptor_ring *ring,
|
||||||
|
comedi_async * async);
|
||||||
|
|
||||||
|
#ifdef DEBUG_MITE
|
||||||
|
void mite_print_chsr(unsigned int chsr);
|
||||||
|
void mite_dump_regs(struct mite_channel *mite_chan);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
static inline int CHAN_OFFSET(int channel)
|
||||||
|
{
|
||||||
|
return 0x500 + 0x100 * channel;
|
||||||
|
};
|
||||||
|
|
||||||
|
enum mite_registers {
|
||||||
|
/* The bits 0x90180700 in MITE_UNKNOWN_DMA_BURST_REG can be
|
||||||
|
written and read back. The bits 0x1f always read as 1.
|
||||||
|
The rest always read as zero. */
|
||||||
|
MITE_UNKNOWN_DMA_BURST_REG = 0x28,
|
||||||
|
MITE_IODWBSR = 0xc0, //IO Device Window Base Size Register
|
||||||
|
MITE_IODWBSR_1 = 0xc4, // IO Device Window Base Size Register 1
|
||||||
|
MITE_IODWCR_1 = 0xf4,
|
||||||
|
MITE_PCI_CONFIG_OFFSET = 0x300,
|
||||||
|
MITE_CSIGR = 0x460 //chip signature
|
||||||
|
};
|
||||||
|
static inline int MITE_CHOR(int channel) // channel operation
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x0;
|
||||||
|
};
|
||||||
|
static inline int MITE_CHCR(int channel) // channel control
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x4;
|
||||||
|
};
|
||||||
|
static inline int MITE_TCR(int channel) // transfer count
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x8;
|
||||||
|
};
|
||||||
|
static inline int MITE_MCR(int channel) // memory configuration
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0xc;
|
||||||
|
};
|
||||||
|
static inline int MITE_MAR(int channel) // memory address
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x10;
|
||||||
|
};
|
||||||
|
static inline int MITE_DCR(int channel) // device configuration
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x14;
|
||||||
|
};
|
||||||
|
static inline int MITE_DAR(int channel) // device address
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x18;
|
||||||
|
};
|
||||||
|
static inline int MITE_LKCR(int channel) // link configuration
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x1c;
|
||||||
|
};
|
||||||
|
static inline int MITE_LKAR(int channel) // link address
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x20;
|
||||||
|
};
|
||||||
|
static inline int MITE_LLKAR(int channel) // see mite section of tnt5002 manual
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x24;
|
||||||
|
};
|
||||||
|
static inline int MITE_BAR(int channel) // base address
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x28;
|
||||||
|
};
|
||||||
|
static inline int MITE_BCR(int channel) // base count
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x2c;
|
||||||
|
};
|
||||||
|
static inline int MITE_SAR(int channel) // ? address
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x30;
|
||||||
|
};
|
||||||
|
static inline int MITE_WSCR(int channel) // ?
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x34;
|
||||||
|
};
|
||||||
|
static inline int MITE_WSER(int channel) // ?
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x38;
|
||||||
|
};
|
||||||
|
static inline int MITE_CHSR(int channel) // channel status
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x3c;
|
||||||
|
};
|
||||||
|
static inline int MITE_FCR(int channel) // fifo count
|
||||||
|
{
|
||||||
|
return CHAN_OFFSET(channel) + 0x40;
|
||||||
|
};
|
||||||
|
|
||||||
|
enum MITE_IODWBSR_bits {
|
||||||
|
WENAB = 0x80, // window enable
|
||||||
|
};
|
||||||
|
|
||||||
|
static inline unsigned MITE_IODWBSR_1_WSIZE_bits(unsigned size)
|
||||||
|
{
|
||||||
|
unsigned order = 0;
|
||||||
|
while (size >>= 1)
|
||||||
|
++order;
|
||||||
|
BUG_ON(order < 1);
|
||||||
|
return (order - 1) & 0x1f;
|
||||||
|
}
|
||||||
|
|
||||||
|
enum MITE_UNKNOWN_DMA_BURST_bits {
|
||||||
|
UNKNOWN_DMA_BURST_ENABLE_BITS = 0x600
|
||||||
|
};
|
||||||
|
|
||||||
|
static inline int mite_csigr_version(u32 csigr_bits)
|
||||||
|
{
|
||||||
|
return csigr_bits & 0xf;
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_type(u32 csigr_bits)
|
||||||
|
{ // original mite = 0, minimite = 1
|
||||||
|
return (csigr_bits >> 4) & 0xf;
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_mmode(u32 csigr_bits)
|
||||||
|
{ // mite mode, minimite = 1
|
||||||
|
return (csigr_bits >> 8) & 0x3;
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_imode(u32 csigr_bits)
|
||||||
|
{ // cpu port interface mode, pci = 0x3
|
||||||
|
return (csigr_bits >> 12) & 0x3;
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_dmac(u32 csigr_bits)
|
||||||
|
{ // number of dma channels
|
||||||
|
return (csigr_bits >> 16) & 0xf;
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_wpdep(u32 csigr_bits)
|
||||||
|
{ // write post fifo depth
|
||||||
|
unsigned int wpdep_bits = (csigr_bits >> 20) & 0x7;
|
||||||
|
if (wpdep_bits == 0)
|
||||||
|
return 0;
|
||||||
|
else
|
||||||
|
return 1 << (wpdep_bits - 1);
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_wins(u32 csigr_bits)
|
||||||
|
{
|
||||||
|
return (csigr_bits >> 24) & 0x1f;
|
||||||
|
};
|
||||||
|
static inline int mite_csigr_iowins(u32 csigr_bits)
|
||||||
|
{ // number of io windows
|
||||||
|
return (csigr_bits >> 29) & 0x7;
|
||||||
|
};
|
||||||
|
|
||||||
|
enum MITE_MCR_bits {
|
||||||
|
MCRPON = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum MITE_DCR_bits {
|
||||||
|
DCR_NORMAL = (1 << 29),
|
||||||
|
DCRPON = 0,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum MITE_CHOR_bits {
|
||||||
|
CHOR_DMARESET = (1 << 31),
|
||||||
|
CHOR_SET_SEND_TC = (1 << 11),
|
||||||
|
CHOR_CLR_SEND_TC = (1 << 10),
|
||||||
|
CHOR_SET_LPAUSE = (1 << 9),
|
||||||
|
CHOR_CLR_LPAUSE = (1 << 8),
|
||||||
|
CHOR_CLRDONE = (1 << 7),
|
||||||
|
CHOR_CLRRB = (1 << 6),
|
||||||
|
CHOR_CLRLC = (1 << 5),
|
||||||
|
CHOR_FRESET = (1 << 4),
|
||||||
|
CHOR_ABORT = (1 << 3), /* stop without emptying fifo */
|
||||||
|
CHOR_STOP = (1 << 2), /* stop after emptying fifo */
|
||||||
|
CHOR_CONT = (1 << 1),
|
||||||
|
CHOR_START = (1 << 0),
|
||||||
|
CHOR_PON = (CHOR_CLR_SEND_TC | CHOR_CLR_LPAUSE),
|
||||||
|
};
|
||||||
|
|
||||||
|
enum MITE_CHCR_bits {
|
||||||
|
CHCR_SET_DMA_IE = (1 << 31),
|
||||||
|
CHCR_CLR_DMA_IE = (1 << 30),
|
||||||
|
CHCR_SET_LINKP_IE = (1 << 29),
|
||||||
|
CHCR_CLR_LINKP_IE = (1 << 28),
|
||||||
|
CHCR_SET_SAR_IE = (1 << 27),
|
||||||
|
CHCR_CLR_SAR_IE = (1 << 26),
|
||||||
|
CHCR_SET_DONE_IE = (1 << 25),
|
||||||
|
CHCR_CLR_DONE_IE = (1 << 24),
|
||||||
|
CHCR_SET_MRDY_IE = (1 << 23),
|
||||||
|
CHCR_CLR_MRDY_IE = (1 << 22),
|
||||||
|
CHCR_SET_DRDY_IE = (1 << 21),
|
||||||
|
CHCR_CLR_DRDY_IE = (1 << 20),
|
||||||
|
CHCR_SET_LC_IE = (1 << 19),
|
||||||
|
CHCR_CLR_LC_IE = (1 << 18),
|
||||||
|
CHCR_SET_CONT_RB_IE = (1 << 17),
|
||||||
|
CHCR_CLR_CONT_RB_IE = (1 << 16),
|
||||||
|
CHCR_FIFODIS = (1 << 15),
|
||||||
|
CHCR_FIFO_ON = 0,
|
||||||
|
CHCR_BURSTEN = (1 << 14),
|
||||||
|
CHCR_NO_BURSTEN = 0,
|
||||||
|
CHCR_BYTE_SWAP_DEVICE = (1 << 6),
|
||||||
|
CHCR_BYTE_SWAP_MEMORY = (1 << 4),
|
||||||
|
CHCR_DIR = (1 << 3),
|
||||||
|
CHCR_DEV_TO_MEM = CHCR_DIR,
|
||||||
|
CHCR_MEM_TO_DEV = 0,
|
||||||
|
CHCR_NORMAL = (0 << 0),
|
||||||
|
CHCR_CONTINUE = (1 << 0),
|
||||||
|
CHCR_RINGBUFF = (2 << 0),
|
||||||
|
CHCR_LINKSHORT = (4 << 0),
|
||||||
|
CHCR_LINKLONG = (5 << 0),
|
||||||
|
CHCRPON =
|
||||||
|
(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),
|
||||||
|
};
|
||||||
|
|
||||||
|
enum ConfigRegister_bits {
|
||||||
|
CR_REQS_MASK = 0x7 << 16,
|
||||||
|
CR_ASEQDONT = 0x0 << 10,
|
||||||
|
CR_ASEQUP = 0x1 << 10,
|
||||||
|
CR_ASEQDOWN = 0x2 << 10,
|
||||||
|
CR_ASEQ_MASK = 0x3 << 10,
|
||||||
|
CR_PSIZE8 = (1 << 8),
|
||||||
|
CR_PSIZE16 = (2 << 8),
|
||||||
|
CR_PSIZE32 = (3 << 8),
|
||||||
|
CR_PORTCPU = (0 << 6),
|
||||||
|
CR_PORTIO = (1 << 6),
|
||||||
|
CR_PORTVXI = (2 << 6),
|
||||||
|
CR_PORTMXI = (3 << 6),
|
||||||
|
CR_AMDEVICE = (1 << 0),
|
||||||
|
};
|
||||||
|
static inline int CR_REQS(int source)
|
||||||
|
{
|
||||||
|
return (source & 0x7) << 16;
|
||||||
|
};
|
||||||
|
static inline int CR_REQSDRQ(unsigned drq_line)
|
||||||
|
{
|
||||||
|
/* This also works on m-series when
|
||||||
|
using channels (drq_line) 4 or 5. */
|
||||||
|
return CR_REQS((drq_line & 0x3) | 0x4);
|
||||||
|
}
|
||||||
|
static inline int CR_RL(unsigned int retry_limit)
|
||||||
|
{
|
||||||
|
int value = 0;
|
||||||
|
|
||||||
|
while (retry_limit) {
|
||||||
|
retry_limit >>= 1;
|
||||||
|
value++;
|
||||||
|
}
|
||||||
|
if (value > 0x7)
|
||||||
|
rt_printk("comedi: bug! retry_limit too large\n");
|
||||||
|
return (value & 0x7) << 21;
|
||||||
|
}
|
||||||
|
|
||||||
|
enum CHSR_bits {
|
||||||
|
CHSR_INT = (1 << 31),
|
||||||
|
CHSR_LPAUSES = (1 << 29),
|
||||||
|
CHSR_SARS = (1 << 27),
|
||||||
|
CHSR_DONE = (1 << 25),
|
||||||
|
CHSR_MRDY = (1 << 23),
|
||||||
|
CHSR_DRDY = (1 << 21),
|
||||||
|
CHSR_LINKC = (1 << 19),
|
||||||
|
CHSR_CONTS_RB = (1 << 17),
|
||||||
|
CHSR_ERROR = (1 << 15),
|
||||||
|
CHSR_SABORT = (1 << 14),
|
||||||
|
CHSR_HABORT = (1 << 13),
|
||||||
|
CHSR_STOPS = (1 << 12),
|
||||||
|
CHSR_OPERR_mask = (3 << 10),
|
||||||
|
CHSR_OPERR_NOERROR = (0 << 10),
|
||||||
|
CHSR_OPERR_FIFOERROR = (1 << 10),
|
||||||
|
CHSR_OPERR_LINKERROR = (1 << 10), /* ??? */
|
||||||
|
CHSR_XFERR = (1 << 9),
|
||||||
|
CHSR_END = (1 << 8),
|
||||||
|
CHSR_DRQ1 = (1 << 7),
|
||||||
|
CHSR_DRQ0 = (1 << 6),
|
||||||
|
CHSR_LxERR_mask = (3 << 4),
|
||||||
|
CHSR_LBERR = (1 << 4),
|
||||||
|
CHSR_LRERR = (2 << 4),
|
||||||
|
CHSR_LOERR = (3 << 4),
|
||||||
|
CHSR_MxERR_mask = (3 << 2),
|
||||||
|
CHSR_MBERR = (1 << 2),
|
||||||
|
CHSR_MRERR = (2 << 2),
|
||||||
|
CHSR_MOERR = (3 << 2),
|
||||||
|
CHSR_DxERR_mask = (3 << 0),
|
||||||
|
CHSR_DBERR = (1 << 0),
|
||||||
|
CHSR_DRERR = (2 << 0),
|
||||||
|
CHSR_DOERR = (3 << 0),
|
||||||
|
};
|
||||||
|
|
||||||
|
static inline void mite_dma_reset(struct mite_channel *mite_chan)
|
||||||
|
{
|
||||||
|
writel(CHOR_DMARESET | CHOR_FRESET,
|
||||||
|
mite_chan->mite->mite_io_addr + MITE_CHOR(mite_chan->channel));
|
||||||
|
};
|
||||||
|
|
||||||
|
#endif
|
||||||
Loading…
Reference in New Issue