/drivers/staging/comedi/drivers/gsc_hpdi.c
https://bitbucket.org/slukk/jb-tsm-kernel-4.2 · C · 1118 lines · 840 code · 166 blank · 112 comment · 107 complexity · d07ddf5ab50d226339aadfa6ec916750 MD5 · raw file
- /*
- comedi/drivers/gsc_hpdi.c
- This is a driver for the General Standards Corporation High
- Speed Parallel Digital Interface rs485 boards.
- Author: Frank Mori Hess <fmhess@users.sourceforge.net>
- Copyright (C) 2003 Coherent Imaging Systems
- COMEDI - Linux Control and Measurement Device Interface
- Copyright (C) 1997-8 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.
- ************************************************************************/
- /*
- Driver: gsc_hpdi
- Description: General Standards Corporation High
- Speed Parallel Digital Interface rs485 boards
- Author: Frank Mori Hess <fmhess@users.sourceforge.net>
- Status: only receive mode works, transmit not supported
- Updated: 2003-02-20
- Devices: [General Standards Corporation] PCI-HPDI32 (gsc_hpdi),
- PMC-HPDI32
- Configuration options:
- [0] - PCI bus of device (optional)
- [1] - PCI slot of device (optional)
- There are some additional hpdi models available from GSC for which
- support could be added to this driver.
- */
- #include <linux/interrupt.h>
- #include "../comedidev.h"
- #include <linux/delay.h>
- #include "comedi_pci.h"
- #include "plx9080.h"
- #include "comedi_fc.h"
- static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it);
- static int hpdi_detach(struct comedi_device *dev);
- static void abort_dma(struct comedi_device *dev, unsigned int channel);
- static int hpdi_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
- static int hpdi_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_cmd *cmd);
- static int hpdi_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
- static irqreturn_t handle_interrupt(int irq, void *d);
- static int dio_config_block_size(struct comedi_device *dev, unsigned int *data);
- #undef HPDI_DEBUG /* disable debugging messages */
- /* #define HPDI_DEBUG enable debugging code */
- #ifdef HPDI_DEBUG
- #define DEBUG_PRINT(format, args...) printk(format , ## args)
- #else
- #define DEBUG_PRINT(format, args...)
- #endif
- #define TIMER_BASE 50 /* 20MHz master clock */
- #define DMA_BUFFER_SIZE 0x10000
- #define NUM_DMA_BUFFERS 4
- #define NUM_DMA_DESCRIPTORS 256
- /* indices of base address regions */
- enum base_address_regions {
- PLX9080_BADDRINDEX = 0,
- HPDI_BADDRINDEX = 2,
- };
- enum hpdi_registers {
- FIRMWARE_REV_REG = 0x0,
- BOARD_CONTROL_REG = 0x4,
- BOARD_STATUS_REG = 0x8,
- TX_PROG_ALMOST_REG = 0xc,
- RX_PROG_ALMOST_REG = 0x10,
- FEATURES_REG = 0x14,
- FIFO_REG = 0x18,
- TX_STATUS_COUNT_REG = 0x1c,
- TX_LINE_VALID_COUNT_REG = 0x20,
- TX_LINE_INVALID_COUNT_REG = 0x24,
- RX_STATUS_COUNT_REG = 0x28,
- RX_LINE_COUNT_REG = 0x2c,
- INTERRUPT_CONTROL_REG = 0x30,
- INTERRUPT_STATUS_REG = 0x34,
- TX_CLOCK_DIVIDER_REG = 0x38,
- TX_FIFO_SIZE_REG = 0x40,
- RX_FIFO_SIZE_REG = 0x44,
- TX_FIFO_WORDS_REG = 0x48,
- RX_FIFO_WORDS_REG = 0x4c,
- INTERRUPT_EDGE_LEVEL_REG = 0x50,
- INTERRUPT_POLARITY_REG = 0x54,
- };
- int command_channel_valid(unsigned int channel)
- {
- if (channel == 0 || channel > 6) {
- printk(KERN_WARNING
- "gsc_hpdi: bug! invalid cable command channel\n");
- return 0;
- }
- return 1;
- }
- /* bit definitions */
- enum firmware_revision_bits {
- FEATURES_REG_PRESENT_BIT = 0x8000,
- };
- int firmware_revision(uint32_t fwr_bits)
- {
- return fwr_bits & 0xff;
- }
- int pcb_revision(uint32_t fwr_bits)
- {
- return (fwr_bits >> 8) & 0xff;
- }
- int hpdi_subid(uint32_t fwr_bits)
- {
- return (fwr_bits >> 16) & 0xff;
- }
- enum board_control_bits {
- BOARD_RESET_BIT = 0x1, /* wait 10usec before accessing fifos */
- TX_FIFO_RESET_BIT = 0x2,
- RX_FIFO_RESET_BIT = 0x4,
- TX_ENABLE_BIT = 0x10,
- RX_ENABLE_BIT = 0x20,
- DEMAND_DMA_DIRECTION_TX_BIT = 0x40,
- /* for ch 0, ch 1 can only transmit (when present) */
- LINE_VALID_ON_STATUS_VALID_BIT = 0x80,
- START_TX_BIT = 0x10,
- CABLE_THROTTLE_ENABLE_BIT = 0x20,
- TEST_MODE_ENABLE_BIT = 0x80000000,
- };
- uint32_t command_discrete_output_bits(unsigned int channel, int output,
- int output_value)
- {
- uint32_t bits = 0;
- if (command_channel_valid(channel) == 0)
- return 0;
- if (output) {
- bits |= 0x1 << (16 + channel);
- if (output_value)
- bits |= 0x1 << (24 + channel);
- } else
- bits |= 0x1 << (24 + channel);
- return bits;
- }
- enum board_status_bits {
- COMMAND_LINE_STATUS_MASK = 0x7f,
- TX_IN_PROGRESS_BIT = 0x80,
- TX_NOT_EMPTY_BIT = 0x100,
- TX_NOT_ALMOST_EMPTY_BIT = 0x200,
- TX_NOT_ALMOST_FULL_BIT = 0x400,
- TX_NOT_FULL_BIT = 0x800,
- RX_NOT_EMPTY_BIT = 0x1000,
- RX_NOT_ALMOST_EMPTY_BIT = 0x2000,
- RX_NOT_ALMOST_FULL_BIT = 0x4000,
- RX_NOT_FULL_BIT = 0x8000,
- BOARD_JUMPER0_INSTALLED_BIT = 0x10000,
- BOARD_JUMPER1_INSTALLED_BIT = 0x20000,
- TX_OVERRUN_BIT = 0x200000,
- RX_UNDERRUN_BIT = 0x400000,
- RX_OVERRUN_BIT = 0x800000,
- };
- uint32_t almost_full_bits(unsigned int num_words)
- {
- /* XXX need to add or subtract one? */
- return (num_words << 16) & 0xff0000;
- }
- uint32_t almost_empty_bits(unsigned int num_words)
- {
- return num_words & 0xffff;
- }
- unsigned int almost_full_num_words(uint32_t bits)
- {
- /* XXX need to add or subtract one? */
- return (bits >> 16) & 0xffff;
- }
- unsigned int almost_empty_num_words(uint32_t bits)
- {
- return bits & 0xffff;
- }
- enum features_bits {
- FIFO_SIZE_PRESENT_BIT = 0x1,
- FIFO_WORDS_PRESENT_BIT = 0x2,
- LEVEL_EDGE_INTERRUPTS_PRESENT_BIT = 0x4,
- GPIO_SUPPORTED_BIT = 0x8,
- PLX_DMA_CH1_SUPPORTED_BIT = 0x10,
- OVERRUN_UNDERRUN_SUPPORTED_BIT = 0x20,
- };
- enum interrupt_sources {
- FRAME_VALID_START_INTR = 0,
- FRAME_VALID_END_INTR = 1,
- TX_FIFO_EMPTY_INTR = 8,
- TX_FIFO_ALMOST_EMPTY_INTR = 9,
- TX_FIFO_ALMOST_FULL_INTR = 10,
- TX_FIFO_FULL_INTR = 11,
- RX_EMPTY_INTR = 12,
- RX_ALMOST_EMPTY_INTR = 13,
- RX_ALMOST_FULL_INTR = 14,
- RX_FULL_INTR = 15,
- };
- int command_intr_source(unsigned int channel)
- {
- if (command_channel_valid(channel) == 0)
- channel = 1;
- return channel + 1;
- }
- uint32_t intr_bit(int interrupt_source)
- {
- return 0x1 << interrupt_source;
- }
- uint32_t tx_clock_divisor_bits(unsigned int divisor)
- {
- return divisor & 0xff;
- }
- unsigned int fifo_size(uint32_t fifo_size_bits)
- {
- return fifo_size_bits & 0xfffff;
- }
- unsigned int fifo_words(uint32_t fifo_words_bits)
- {
- return fifo_words_bits & 0xfffff;
- }
- uint32_t intr_edge_bit(int interrupt_source)
- {
- return 0x1 << interrupt_source;
- }
- uint32_t intr_active_high_bit(int interrupt_source)
- {
- return 0x1 << interrupt_source;
- }
- struct hpdi_board {
- char *name;
- int device_id; /* pci device id */
- int subdevice_id; /* pci subdevice id */
- };
- static const struct hpdi_board hpdi_boards[] = {
- {
- .name = "pci-hpdi32",
- .device_id = PCI_DEVICE_ID_PLX_9080,
- .subdevice_id = 0x2400,
- },
- #if 0
- {
- .name = "pxi-hpdi32",
- .device_id = 0x9656,
- .subdevice_id = 0x2705,
- },
- #endif
- };
- static DEFINE_PCI_DEVICE_TABLE(hpdi_pci_table) = {
- {
- PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9080, PCI_VENDOR_ID_PLX,
- 0x2400, 0, 0, 0}, {
- 0}
- };
- MODULE_DEVICE_TABLE(pci, hpdi_pci_table);
- static inline struct hpdi_board *board(const struct comedi_device *dev)
- {
- return (struct hpdi_board *)dev->board_ptr;
- }
- struct hpdi_private {
- struct pci_dev *hw_dev; /* pointer to board's pci_dev struct */
- /* base addresses (physical) */
- resource_size_t plx9080_phys_iobase;
- resource_size_t hpdi_phys_iobase;
- /* base addresses (ioremapped) */
- void *plx9080_iobase;
- void *hpdi_iobase;
- uint32_t *dio_buffer[NUM_DMA_BUFFERS]; /* dma buffers */
- /* physical addresses of dma buffers */
- dma_addr_t dio_buffer_phys_addr[NUM_DMA_BUFFERS];
- /* array of dma descriptors read by plx9080, allocated to get proper
- * alignment */
- struct plx_dma_desc *dma_desc;
- /* physical address of dma descriptor array */
- dma_addr_t dma_desc_phys_addr;
- unsigned int num_dma_descriptors;
- /* pointer to start of buffers indexed by descriptor */
- uint32_t *desc_dio_buffer[NUM_DMA_DESCRIPTORS];
- /* index of the dma descriptor that is currently being used */
- volatile unsigned int dma_desc_index;
- unsigned int tx_fifo_size;
- unsigned int rx_fifo_size;
- volatile unsigned long dio_count;
- /* software copies of values written to hpdi registers */
- volatile uint32_t bits[24];
- /* number of bytes at which to generate COMEDI_CB_BLOCK events */
- volatile unsigned int block_size;
- unsigned dio_config_output:1;
- };
- static inline struct hpdi_private *priv(struct comedi_device *dev)
- {
- return dev->private;
- }
- static struct comedi_driver driver_hpdi = {
- .driver_name = "gsc_hpdi",
- .module = THIS_MODULE,
- .attach = hpdi_attach,
- .detach = hpdi_detach,
- };
- static int __devinit driver_hpdi_pci_probe(struct pci_dev *dev,
- const struct pci_device_id *ent)
- {
- return comedi_pci_auto_config(dev, driver_hpdi.driver_name);
- }
- static void __devexit driver_hpdi_pci_remove(struct pci_dev *dev)
- {
- comedi_pci_auto_unconfig(dev);
- }
- static struct pci_driver driver_hpdi_pci_driver = {
- .id_table = hpdi_pci_table,
- .probe = &driver_hpdi_pci_probe,
- .remove = __devexit_p(&driver_hpdi_pci_remove)
- };
- static int __init driver_hpdi_init_module(void)
- {
- int retval;
- retval = comedi_driver_register(&driver_hpdi);
- if (retval < 0)
- return retval;
- driver_hpdi_pci_driver.name = (char *)driver_hpdi.driver_name;
- return pci_register_driver(&driver_hpdi_pci_driver);
- }
- static void __exit driver_hpdi_cleanup_module(void)
- {
- pci_unregister_driver(&driver_hpdi_pci_driver);
- comedi_driver_unregister(&driver_hpdi);
- }
- module_init(driver_hpdi_init_module);
- module_exit(driver_hpdi_cleanup_module);
- static int dio_config_insn(struct comedi_device *dev,
- struct comedi_subdevice *s, struct comedi_insn *insn,
- unsigned int *data)
- {
- switch (data[0]) {
- case INSN_CONFIG_DIO_OUTPUT:
- priv(dev)->dio_config_output = 1;
- return insn->n;
- break;
- case INSN_CONFIG_DIO_INPUT:
- priv(dev)->dio_config_output = 0;
- return insn->n;
- break;
- case INSN_CONFIG_DIO_QUERY:
- data[1] =
- priv(dev)->dio_config_output ? COMEDI_OUTPUT : COMEDI_INPUT;
- return insn->n;
- break;
- case INSN_CONFIG_BLOCK_SIZE:
- return dio_config_block_size(dev, data);
- break;
- default:
- break;
- }
- return -EINVAL;
- }
- static void disable_plx_interrupts(struct comedi_device *dev)
- {
- writel(0, priv(dev)->plx9080_iobase + PLX_INTRCS_REG);
- }
- /* initialize plx9080 chip */
- static void init_plx9080(struct comedi_device *dev)
- {
- uint32_t bits;
- void *plx_iobase = priv(dev)->plx9080_iobase;
- /* plx9080 dump */
- DEBUG_PRINT(" plx interrupt status 0x%x\n",
- readl(plx_iobase + PLX_INTRCS_REG));
- DEBUG_PRINT(" plx id bits 0x%x\n", readl(plx_iobase + PLX_ID_REG));
- DEBUG_PRINT(" plx control reg 0x%x\n",
- readl(priv(dev)->plx9080_iobase + PLX_CONTROL_REG));
- DEBUG_PRINT(" plx revision 0x%x\n",
- readl(plx_iobase + PLX_REVISION_REG));
- DEBUG_PRINT(" plx dma channel 0 mode 0x%x\n",
- readl(plx_iobase + PLX_DMA0_MODE_REG));
- DEBUG_PRINT(" plx dma channel 1 mode 0x%x\n",
- readl(plx_iobase + PLX_DMA1_MODE_REG));
- DEBUG_PRINT(" plx dma channel 0 pci address 0x%x\n",
- readl(plx_iobase + PLX_DMA0_PCI_ADDRESS_REG));
- DEBUG_PRINT(" plx dma channel 0 local address 0x%x\n",
- readl(plx_iobase + PLX_DMA0_LOCAL_ADDRESS_REG));
- DEBUG_PRINT(" plx dma channel 0 transfer size 0x%x\n",
- readl(plx_iobase + PLX_DMA0_TRANSFER_SIZE_REG));
- DEBUG_PRINT(" plx dma channel 0 descriptor 0x%x\n",
- readl(plx_iobase + PLX_DMA0_DESCRIPTOR_REG));
- DEBUG_PRINT(" plx dma channel 0 command status 0x%x\n",
- readb(plx_iobase + PLX_DMA0_CS_REG));
- DEBUG_PRINT(" plx dma channel 0 threshold 0x%x\n",
- readl(plx_iobase + PLX_DMA0_THRESHOLD_REG));
- DEBUG_PRINT(" plx bigend 0x%x\n", readl(plx_iobase + PLX_BIGEND_REG));
- #ifdef __BIG_ENDIAN
- bits = BIGEND_DMA0 | BIGEND_DMA1;
- #else
- bits = 0;
- #endif
- writel(bits, priv(dev)->plx9080_iobase + PLX_BIGEND_REG);
- disable_plx_interrupts(dev);
- abort_dma(dev, 0);
- abort_dma(dev, 1);
- /* configure dma0 mode */
- bits = 0;
- /* enable ready input */
- bits |= PLX_DMA_EN_READYIN_BIT;
- /* enable dma chaining */
- bits |= PLX_EN_CHAIN_BIT;
- /* enable interrupt on dma done
- * (probably don't need this, since chain never finishes) */
- bits |= PLX_EN_DMA_DONE_INTR_BIT;
- /* don't increment local address during transfers
- * (we are transferring from a fixed fifo register) */
- bits |= PLX_LOCAL_ADDR_CONST_BIT;
- /* route dma interrupt to pci bus */
- bits |= PLX_DMA_INTR_PCI_BIT;
- /* enable demand mode */
- bits |= PLX_DEMAND_MODE_BIT;
- /* enable local burst mode */
- bits |= PLX_DMA_LOCAL_BURST_EN_BIT;
- bits |= PLX_LOCAL_BUS_32_WIDE_BITS;
- writel(bits, plx_iobase + PLX_DMA0_MODE_REG);
- }
- /* Allocate and initialize the subdevice structures.
- */
- static int setup_subdevices(struct comedi_device *dev)
- {
- struct comedi_subdevice *s;
- if (alloc_subdevices(dev, 1) < 0)
- return -ENOMEM;
- s = dev->subdevices + 0;
- /* analog input subdevice */
- dev->read_subdev = s;
- /* dev->write_subdev = s; */
- s->type = COMEDI_SUBD_DIO;
- s->subdev_flags =
- SDF_READABLE | SDF_WRITEABLE | SDF_LSAMPL | SDF_CMD_READ;
- s->n_chan = 32;
- s->len_chanlist = 32;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_config = dio_config_insn;
- s->do_cmd = hpdi_cmd;
- s->do_cmdtest = hpdi_cmd_test;
- s->cancel = hpdi_cancel;
- return 0;
- }
- static int init_hpdi(struct comedi_device *dev)
- {
- uint32_t plx_intcsr_bits;
- writel(BOARD_RESET_BIT, priv(dev)->hpdi_iobase + BOARD_CONTROL_REG);
- udelay(10);
- writel(almost_empty_bits(32) | almost_full_bits(32),
- priv(dev)->hpdi_iobase + RX_PROG_ALMOST_REG);
- writel(almost_empty_bits(32) | almost_full_bits(32),
- priv(dev)->hpdi_iobase + TX_PROG_ALMOST_REG);
- priv(dev)->tx_fifo_size = fifo_size(readl(priv(dev)->hpdi_iobase +
- TX_FIFO_SIZE_REG));
- priv(dev)->rx_fifo_size = fifo_size(readl(priv(dev)->hpdi_iobase +
- RX_FIFO_SIZE_REG));
- writel(0, priv(dev)->hpdi_iobase + INTERRUPT_CONTROL_REG);
- /* enable interrupts */
- plx_intcsr_bits =
- ICS_AERR | ICS_PERR | ICS_PIE | ICS_PLIE | ICS_PAIE | ICS_LIE |
- ICS_DMA0_E;
- writel(plx_intcsr_bits, priv(dev)->plx9080_iobase + PLX_INTRCS_REG);
- return 0;
- }
- /* setup dma descriptors so a link completes every 'transfer_size' bytes */
- static int setup_dma_descriptors(struct comedi_device *dev,
- unsigned int transfer_size)
- {
- unsigned int buffer_index, buffer_offset;
- uint32_t next_bits = PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT |
- PLX_XFER_LOCAL_TO_PCI;
- unsigned int i;
- if (transfer_size > DMA_BUFFER_SIZE)
- transfer_size = DMA_BUFFER_SIZE;
- transfer_size -= transfer_size % sizeof(uint32_t);
- if (transfer_size == 0)
- return -1;
- DEBUG_PRINT(" transfer_size %i\n", transfer_size);
- DEBUG_PRINT(" descriptors at 0x%lx\n",
- (unsigned long)priv(dev)->dma_desc_phys_addr);
- buffer_offset = 0;
- buffer_index = 0;
- for (i = 0; i < NUM_DMA_DESCRIPTORS &&
- buffer_index < NUM_DMA_BUFFERS; i++) {
- priv(dev)->dma_desc[i].pci_start_addr =
- cpu_to_le32(priv(dev)->dio_buffer_phys_addr[buffer_index] +
- buffer_offset);
- priv(dev)->dma_desc[i].local_start_addr = cpu_to_le32(FIFO_REG);
- priv(dev)->dma_desc[i].transfer_size =
- cpu_to_le32(transfer_size);
- priv(dev)->dma_desc[i].next =
- cpu_to_le32((priv(dev)->dma_desc_phys_addr + (i +
- 1) *
- sizeof(priv(dev)->dma_desc[0])) | next_bits);
- priv(dev)->desc_dio_buffer[i] =
- priv(dev)->dio_buffer[buffer_index] +
- (buffer_offset / sizeof(uint32_t));
- buffer_offset += transfer_size;
- if (transfer_size + buffer_offset > DMA_BUFFER_SIZE) {
- buffer_offset = 0;
- buffer_index++;
- }
- DEBUG_PRINT(" desc %i\n", i);
- DEBUG_PRINT(" start addr virt 0x%p, phys 0x%lx\n",
- priv(dev)->desc_dio_buffer[i],
- (unsigned long)priv(dev)->dma_desc[i].
- pci_start_addr);
- DEBUG_PRINT(" next 0x%lx\n",
- (unsigned long)priv(dev)->dma_desc[i].next);
- }
- priv(dev)->num_dma_descriptors = i;
- /* fix last descriptor to point back to first */
- priv(dev)->dma_desc[i - 1].next =
- cpu_to_le32(priv(dev)->dma_desc_phys_addr | next_bits);
- DEBUG_PRINT(" desc %i next fixup 0x%lx\n", i - 1,
- (unsigned long)priv(dev)->dma_desc[i - 1].next);
- priv(dev)->block_size = transfer_size;
- return transfer_size;
- }
- static int hpdi_attach(struct comedi_device *dev, struct comedi_devconfig *it)
- {
- struct pci_dev *pcidev;
- int i;
- int retval;
- printk(KERN_WARNING "comedi%d: gsc_hpdi\n", dev->minor);
- if (alloc_private(dev, sizeof(struct hpdi_private)) < 0)
- return -ENOMEM;
- pcidev = NULL;
- for (i = 0; i < ARRAY_SIZE(hpdi_boards) &&
- dev->board_ptr == NULL; i++) {
- do {
- pcidev = pci_get_subsys(PCI_VENDOR_ID_PLX,
- hpdi_boards[i].device_id,
- PCI_VENDOR_ID_PLX,
- hpdi_boards[i].subdevice_id,
- pcidev);
- /* was a particular bus/slot requested? */
- if (it->options[0] || it->options[1]) {
- /* are we on the wrong bus/slot? */
- if (pcidev->bus->number != it->options[0] ||
- PCI_SLOT(pcidev->devfn) != it->options[1])
- continue;
- }
- if (pcidev) {
- priv(dev)->hw_dev = pcidev;
- dev->board_ptr = hpdi_boards + i;
- break;
- }
- } while (pcidev != NULL);
- }
- if (dev->board_ptr == NULL) {
- printk(KERN_WARNING "gsc_hpdi: no hpdi card found\n");
- return -EIO;
- }
- printk(KERN_WARNING
- "gsc_hpdi: found %s on bus %i, slot %i\n", board(dev)->name,
- pcidev->bus->number, PCI_SLOT(pcidev->devfn));
- if (comedi_pci_enable(pcidev, driver_hpdi.driver_name)) {
- printk(KERN_WARNING
- " failed enable PCI device and request regions\n");
- return -EIO;
- }
- pci_set_master(pcidev);
- /* Initialize dev->board_name */
- dev->board_name = board(dev)->name;
- priv(dev)->plx9080_phys_iobase =
- pci_resource_start(pcidev, PLX9080_BADDRINDEX);
- priv(dev)->hpdi_phys_iobase =
- pci_resource_start(pcidev, HPDI_BADDRINDEX);
- /* remap, won't work with 2.0 kernels but who cares */
- priv(dev)->plx9080_iobase = ioremap(priv(dev)->plx9080_phys_iobase,
- pci_resource_len(pcidev,
- PLX9080_BADDRINDEX));
- priv(dev)->hpdi_iobase =
- ioremap(priv(dev)->hpdi_phys_iobase,
- pci_resource_len(pcidev, HPDI_BADDRINDEX));
- if (!priv(dev)->plx9080_iobase || !priv(dev)->hpdi_iobase) {
- printk(KERN_WARNING " failed to remap io memory\n");
- return -ENOMEM;
- }
- DEBUG_PRINT(" plx9080 remapped to 0x%p\n", priv(dev)->plx9080_iobase);
- DEBUG_PRINT(" hpdi remapped to 0x%p\n", priv(dev)->hpdi_iobase);
- init_plx9080(dev);
- /* get irq */
- if (request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED,
- driver_hpdi.driver_name, dev)) {
- printk(KERN_WARNING
- " unable to allocate irq %u\n", pcidev->irq);
- return -EINVAL;
- }
- dev->irq = pcidev->irq;
- printk(KERN_WARNING " irq %u\n", dev->irq);
- /* alocate pci dma buffers */
- for (i = 0; i < NUM_DMA_BUFFERS; i++) {
- priv(dev)->dio_buffer[i] =
- pci_alloc_consistent(priv(dev)->hw_dev, DMA_BUFFER_SIZE,
- &priv(dev)->dio_buffer_phys_addr[i]);
- DEBUG_PRINT("dio_buffer at virt 0x%p, phys 0x%lx\n",
- priv(dev)->dio_buffer[i],
- (unsigned long)priv(dev)->dio_buffer_phys_addr[i]);
- }
- /* allocate dma descriptors */
- priv(dev)->dma_desc = pci_alloc_consistent(priv(dev)->hw_dev,
- sizeof(struct plx_dma_desc) *
- NUM_DMA_DESCRIPTORS,
- &priv(dev)->
- dma_desc_phys_addr);
- if (priv(dev)->dma_desc_phys_addr & 0xf) {
- printk(KERN_WARNING
- " dma descriptors not quad-word aligned (bug)\n");
- return -EIO;
- }
- retval = setup_dma_descriptors(dev, 0x1000);
- if (retval < 0)
- return retval;
- retval = setup_subdevices(dev);
- if (retval < 0)
- return retval;
- return init_hpdi(dev);
- }
- static int hpdi_detach(struct comedi_device *dev)
- {
- unsigned int i;
- printk(KERN_WARNING "comedi%d: gsc_hpdi: remove\n", dev->minor);
- if (dev->irq)
- free_irq(dev->irq, dev);
- if ((priv(dev)) && (priv(dev)->hw_dev)) {
- if (priv(dev)->plx9080_iobase) {
- disable_plx_interrupts(dev);
- iounmap((void *)priv(dev)->plx9080_iobase);
- }
- if (priv(dev)->hpdi_iobase)
- iounmap((void *)priv(dev)->hpdi_iobase);
- /* free pci dma buffers */
- for (i = 0; i < NUM_DMA_BUFFERS; i++) {
- if (priv(dev)->dio_buffer[i])
- pci_free_consistent(priv(dev)->hw_dev,
- DMA_BUFFER_SIZE,
- priv(dev)->
- dio_buffer[i],
- priv
- (dev)->dio_buffer_phys_addr
- [i]);
- }
- /* free dma descriptors */
- if (priv(dev)->dma_desc)
- pci_free_consistent(priv(dev)->hw_dev,
- sizeof(struct plx_dma_desc)
- * NUM_DMA_DESCRIPTORS,
- priv(dev)->dma_desc,
- priv(dev)->
- dma_desc_phys_addr);
- if (priv(dev)->hpdi_phys_iobase)
- comedi_pci_disable(priv(dev)->hw_dev);
- pci_dev_put(priv(dev)->hw_dev);
- }
- return 0;
- }
- static int dio_config_block_size(struct comedi_device *dev, unsigned int *data)
- {
- unsigned int requested_block_size;
- int retval;
- requested_block_size = data[1];
- retval = setup_dma_descriptors(dev, requested_block_size);
- if (retval < 0)
- return retval;
- data[1] = retval;
- return 2;
- }
- static int di_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_cmd *cmd)
- {
- int err = 0;
- int tmp;
- int i;
- /* step 1: make sure trigger sources are trivially valid */
- tmp = cmd->start_src;
- cmd->start_src &= TRIG_NOW;
- if (!cmd->start_src || tmp != cmd->start_src)
- err++;
- tmp = cmd->scan_begin_src;
- cmd->scan_begin_src &= TRIG_EXT;
- if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
- err++;
- tmp = cmd->convert_src;
- cmd->convert_src &= TRIG_NOW;
- if (!cmd->convert_src || tmp != cmd->convert_src)
- err++;
- tmp = cmd->scan_end_src;
- cmd->scan_end_src &= TRIG_COUNT;
- if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
- err++;
- tmp = cmd->stop_src;
- cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
- if (!cmd->stop_src || tmp != cmd->stop_src)
- err++;
- if (err)
- return 1;
- /* step 2: make sure trigger sources are unique and mutually
- * compatible */
- /* uniqueness check */
- if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
- err++;
- if (err)
- return 2;
- /* step 3: make sure arguments are trivially compatible */
- if (!cmd->chanlist_len) {
- cmd->chanlist_len = 32;
- err++;
- }
- if (cmd->scan_end_arg != cmd->chanlist_len) {
- cmd->scan_end_arg = cmd->chanlist_len;
- err++;
- }
- switch (cmd->stop_src) {
- case TRIG_COUNT:
- if (!cmd->stop_arg) {
- cmd->stop_arg = 1;
- err++;
- }
- break;
- case TRIG_NONE:
- if (cmd->stop_arg != 0) {
- cmd->stop_arg = 0;
- err++;
- }
- break;
- default:
- break;
- }
- if (err)
- return 3;
- /* step 4: fix up any arguments */
- if (err)
- return 4;
- if (!cmd->chanlist)
- return 0;
- for (i = 1; i < cmd->chanlist_len; i++) {
- if (CR_CHAN(cmd->chanlist[i]) != i) {
- /* XXX could support 8 or 16 channels */
- comedi_error(dev,
- "chanlist must be ch 0 to 31 in order");
- err++;
- break;
- }
- }
- if (err)
- return 5;
- return 0;
- }
- static int hpdi_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
- struct comedi_cmd *cmd)
- {
- if (priv(dev)->dio_config_output)
- return -EINVAL;
- else
- return di_cmd_test(dev, s, cmd);
- }
- static inline void hpdi_writel(struct comedi_device *dev, uint32_t bits,
- unsigned int offset)
- {
- writel(bits | priv(dev)->bits[offset / sizeof(uint32_t)],
- priv(dev)->hpdi_iobase + offset);
- }
- static int di_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
- {
- uint32_t bits;
- unsigned long flags;
- struct comedi_async *async = s->async;
- struct comedi_cmd *cmd = &async->cmd;
- hpdi_writel(dev, RX_FIFO_RESET_BIT, BOARD_CONTROL_REG);
- DEBUG_PRINT("hpdi: in di_cmd\n");
- abort_dma(dev, 0);
- priv(dev)->dma_desc_index = 0;
- /* These register are supposedly unused during chained dma,
- * but I have found that left over values from last operation
- * occasionally cause problems with transfer of first dma
- * block. Initializing them to zero seems to fix the problem. */
- writel(0, priv(dev)->plx9080_iobase + PLX_DMA0_TRANSFER_SIZE_REG);
- writel(0, priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG);
- writel(0, priv(dev)->plx9080_iobase + PLX_DMA0_LOCAL_ADDRESS_REG);
- /* give location of first dma descriptor */
- bits =
- priv(dev)->dma_desc_phys_addr | PLX_DESC_IN_PCI_BIT |
- PLX_INTR_TERM_COUNT | PLX_XFER_LOCAL_TO_PCI;
- writel(bits, priv(dev)->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG);
- /* spinlock for plx dma control/status reg */
- spin_lock_irqsave(&dev->spinlock, flags);
- /* enable dma transfer */
- writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT | PLX_CLEAR_DMA_INTR_BIT,
- priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
- spin_unlock_irqrestore(&dev->spinlock, flags);
- if (cmd->stop_src == TRIG_COUNT)
- priv(dev)->dio_count = cmd->stop_arg;
- else
- priv(dev)->dio_count = 1;
- /* clear over/under run status flags */
- writel(RX_UNDERRUN_BIT | RX_OVERRUN_BIT,
- priv(dev)->hpdi_iobase + BOARD_STATUS_REG);
- /* enable interrupts */
- writel(intr_bit(RX_FULL_INTR),
- priv(dev)->hpdi_iobase + INTERRUPT_CONTROL_REG);
- DEBUG_PRINT("hpdi: starting rx\n");
- hpdi_writel(dev, RX_ENABLE_BIT, BOARD_CONTROL_REG);
- return 0;
- }
- static int hpdi_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
- {
- if (priv(dev)->dio_config_output)
- return -EINVAL;
- else
- return di_cmd(dev, s);
- }
- static void drain_dma_buffers(struct comedi_device *dev, unsigned int channel)
- {
- struct comedi_async *async = dev->read_subdev->async;
- uint32_t next_transfer_addr;
- int j;
- int num_samples = 0;
- void *pci_addr_reg;
- if (channel)
- pci_addr_reg =
- priv(dev)->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG;
- else
- pci_addr_reg =
- priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG;
- /* loop until we have read all the full buffers */
- j = 0;
- for (next_transfer_addr = readl(pci_addr_reg);
- (next_transfer_addr <
- le32_to_cpu(priv(dev)->dma_desc[priv(dev)->dma_desc_index].
- pci_start_addr)
- || next_transfer_addr >=
- le32_to_cpu(priv(dev)->dma_desc[priv(dev)->dma_desc_index].
- pci_start_addr) + priv(dev)->block_size)
- && j < priv(dev)->num_dma_descriptors; j++) {
- /* transfer data from dma buffer to comedi buffer */
- num_samples = priv(dev)->block_size / sizeof(uint32_t);
- if (async->cmd.stop_src == TRIG_COUNT) {
- if (num_samples > priv(dev)->dio_count)
- num_samples = priv(dev)->dio_count;
- priv(dev)->dio_count -= num_samples;
- }
- cfc_write_array_to_buffer(dev->read_subdev,
- priv(dev)->desc_dio_buffer[priv(dev)->
- dma_desc_index],
- num_samples * sizeof(uint32_t));
- priv(dev)->dma_desc_index++;
- priv(dev)->dma_desc_index %= priv(dev)->num_dma_descriptors;
- DEBUG_PRINT("next desc addr 0x%lx\n", (unsigned long)
- priv(dev)->dma_desc[priv(dev)->dma_desc_index].
- next);
- DEBUG_PRINT("pci addr reg 0x%x\n", next_transfer_addr);
- }
- /* XXX check for buffer overrun somehow */
- }
- static irqreturn_t handle_interrupt(int irq, void *d)
- {
- struct comedi_device *dev = d;
- struct comedi_subdevice *s = dev->read_subdev;
- struct comedi_async *async = s->async;
- uint32_t hpdi_intr_status, hpdi_board_status;
- uint32_t plx_status;
- uint32_t plx_bits;
- uint8_t dma0_status, dma1_status;
- unsigned long flags;
- if (!dev->attached)
- return IRQ_NONE;
- plx_status = readl(priv(dev)->plx9080_iobase + PLX_INTRCS_REG);
- if ((plx_status & (ICS_DMA0_A | ICS_DMA1_A | ICS_LIA)) == 0)
- return IRQ_NONE;
- hpdi_intr_status = readl(priv(dev)->hpdi_iobase + INTERRUPT_STATUS_REG);
- hpdi_board_status = readl(priv(dev)->hpdi_iobase + BOARD_STATUS_REG);
- async->events = 0;
- if (hpdi_intr_status) {
- DEBUG_PRINT("hpdi: intr status 0x%x, ", hpdi_intr_status);
- writel(hpdi_intr_status,
- priv(dev)->hpdi_iobase + INTERRUPT_STATUS_REG);
- }
- /* spin lock makes sure no one else changes plx dma control reg */
- spin_lock_irqsave(&dev->spinlock, flags);
- dma0_status = readb(priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
- if (plx_status & ICS_DMA0_A) { /* dma chan 0 interrupt */
- writeb((dma0_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT,
- priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
- DEBUG_PRINT("dma0 status 0x%x\n", dma0_status);
- if (dma0_status & PLX_DMA_EN_BIT)
- drain_dma_buffers(dev, 0);
- DEBUG_PRINT(" cleared dma ch0 interrupt\n");
- }
- spin_unlock_irqrestore(&dev->spinlock, flags);
- /* spin lock makes sure no one else changes plx dma control reg */
- spin_lock_irqsave(&dev->spinlock, flags);
- dma1_status = readb(priv(dev)->plx9080_iobase + PLX_DMA1_CS_REG);
- if (plx_status & ICS_DMA1_A) { /* XXX *//* dma chan 1 interrupt */
- writeb((dma1_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT,
- priv(dev)->plx9080_iobase + PLX_DMA1_CS_REG);
- DEBUG_PRINT("dma1 status 0x%x\n", dma1_status);
- DEBUG_PRINT(" cleared dma ch1 interrupt\n");
- }
- spin_unlock_irqrestore(&dev->spinlock, flags);
- /* clear possible plx9080 interrupt sources */
- if (plx_status & ICS_LDIA) { /* clear local doorbell interrupt */
- plx_bits = readl(priv(dev)->plx9080_iobase + PLX_DBR_OUT_REG);
- writel(plx_bits, priv(dev)->plx9080_iobase + PLX_DBR_OUT_REG);
- DEBUG_PRINT(" cleared local doorbell bits 0x%x\n", plx_bits);
- }
- if (hpdi_board_status & RX_OVERRUN_BIT) {
- comedi_error(dev, "rx fifo overrun");
- async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
- DEBUG_PRINT("dma0_status 0x%x\n",
- (int)readb(priv(dev)->plx9080_iobase +
- PLX_DMA0_CS_REG));
- }
- if (hpdi_board_status & RX_UNDERRUN_BIT) {
- comedi_error(dev, "rx fifo underrun");
- async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
- }
- if (priv(dev)->dio_count == 0)
- async->events |= COMEDI_CB_EOA;
- DEBUG_PRINT("board status 0x%x, ", hpdi_board_status);
- DEBUG_PRINT("plx status 0x%x\n", plx_status);
- if (async->events)
- DEBUG_PRINT(" events 0x%x\n", async->events);
- cfc_handle_events(dev, s);
- return IRQ_HANDLED;
- }
- static void abort_dma(struct comedi_device *dev, unsigned int channel)
- {
- unsigned long flags;
- /* spinlock for plx dma control/status reg */
- spin_lock_irqsave(&dev->spinlock, flags);
- plx9080_abort_dma(priv(dev)->plx9080_iobase, channel);
- spin_unlock_irqrestore(&dev->spinlock, flags);
- }
- static int hpdi_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
- {
- hpdi_writel(dev, 0, BOARD_CONTROL_REG);
- writel(0, priv(dev)->hpdi_iobase + INTERRUPT_CONTROL_REG);
- abort_dma(dev, 0);
- return 0;
- }
- MODULE_AUTHOR("Comedi http://www.comedi.org");
- MODULE_DESCRIPTION("Comedi low-level driver");
- MODULE_LICENSE("GPL");