diff options
| -rw-r--r-- | drivers/staging/comedi/drivers/gsc_hpdi.c | 120 |
1 files changed, 60 insertions, 60 deletions
diff --git a/drivers/staging/comedi/drivers/gsc_hpdi.c b/drivers/staging/comedi/drivers/gsc_hpdi.c index 49e5c86c2dd..69359c00d2a 100644 --- a/drivers/staging/comedi/drivers/gsc_hpdi.c +++ b/drivers/staging/comedi/drivers/gsc_hpdi.c @@ -62,8 +62,8 @@ static int hpdi_cancel(struct comedi_device * dev, struct comedi_subdevice * s); static irqreturn_t handle_interrupt(int irq, void *d PT_REGS_ARG); 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 +#undef HPDI_DEBUG /* disable debugging messages */ +/* #define HPDI_DEBUG enable debugging code */ #ifdef HPDI_DEBUG #define DEBUG_PRINT(format, args...) rt_printk(format , ## args ) @@ -71,12 +71,12 @@ static int dio_config_block_size(struct comedi_device * dev, unsigned int * data #define DEBUG_PRINT(format, args...) #endif -#define TIMER_BASE 50 // 20MHz master clock +#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 +/* indices of base address regions */ enum base_address_regions { PLX9080_BADDRINDEX = 0, HPDI_BADDRINDEX = 2, @@ -115,7 +115,7 @@ int command_channel_valid(unsigned int channel) return 1; } -// bit definitions +/* bit definitions */ enum firmware_revision_bits { FEATURES_REG_PRESENT_BIT = 0x8000, @@ -184,7 +184,7 @@ enum board_status_bits { uint32_t almost_full_bits(unsigned int num_words) { -// XXX need to add or subtract one? +/* XXX need to add or subtract one? */ return (num_words << 16) & 0xff0000; } @@ -194,7 +194,7 @@ uint32_t almost_empty_bits(unsigned int num_words) } unsigned int almost_full_num_words(uint32_t bits) { -// XXX need to add or subtract one? +/* XXX need to add or subtract one? */ return (bits >> 16) & 0xffff; } unsigned int almost_empty_num_words(uint32_t bits) @@ -263,8 +263,8 @@ uint32_t intr_active_high_bit(int interrupt_source) struct hpdi_board { char *name; - int device_id; // pci device id - int subdevice_id; // pci subdevice id + int device_id; /* pci device id */ + int subdevice_id; /* pci subdevice id */ }; @@ -303,25 +303,25 @@ static inline struct hpdi_board *board(const struct comedi_device * dev) struct hpdi_private { - struct pci_dev *hw_dev; // pointer to board's pci_dev struct - // base addresses (physical) + 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) + /* base addresses (ioremapped) */ void *plx9080_iobase; void *hpdi_iobase; - uint32_t *dio_buffer[NUM_DMA_BUFFERS]; // dma buffers - dma_addr_t dio_buffer_phys_addr[NUM_DMA_BUFFERS]; // physical addresses of dma buffers - struct plx_dma_desc *dma_desc; // array of dma descriptors read by plx9080, allocated to get proper alignment - dma_addr_t dma_desc_phys_addr; // physical address of dma descriptor array + uint32_t *dio_buffer[NUM_DMA_BUFFERS]; /* dma buffers */ + dma_addr_t dio_buffer_phys_addr[NUM_DMA_BUFFERS]; /* physical addresses of dma buffers */ + struct plx_dma_desc *dma_desc; /* array of dma descriptors read by plx9080, allocated to get proper alignment */ + dma_addr_t dma_desc_phys_addr; /* physical address of dma descriptor array */ unsigned int num_dma_descriptors; - uint32_t *desc_dio_buffer[NUM_DMA_DESCRIPTORS]; // pointer to start of buffers indexed by descriptor - volatile unsigned int dma_desc_index; // index of the dma descriptor that is currently being used + uint32_t *desc_dio_buffer[NUM_DMA_DESCRIPTORS]; /* pointer to start of buffers indexed by descriptor */ + volatile unsigned int dma_desc_index; /* index of the dma descriptor that is currently being used */ unsigned int tx_fifo_size; unsigned int rx_fifo_size; volatile unsigned long dio_count; - volatile uint32_t bits[24]; // software copies of values written to hpdi registers - volatile unsigned int block_size; // number of bytes at which to generate COMEDI_CB_BLOCK events + volatile uint32_t bits[24]; /* software copies of values written to hpdi registers */ + volatile unsigned int block_size; /* number of bytes at which to generate COMEDI_CB_BLOCK events */ unsigned dio_config_output:1; }; @@ -373,13 +373,13 @@ static void disable_plx_interrupts(struct comedi_device * dev) writel(0, priv(dev)->plx9080_iobase + PLX_INTRCS_REG); } -// initialize plx9080 chip +/* initialize plx9080 chip */ static void init_plx9080(struct comedi_device * dev) { uint32_t bits; void *plx_iobase = priv(dev)->plx9080_iobase; - // plx9080 dump + /* 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)); @@ -417,21 +417,21 @@ static void init_plx9080(struct comedi_device * dev) abort_dma(dev, 0); abort_dma(dev, 1); - // configure dma0 mode + /* configure dma0 mode */ bits = 0; - // enable ready input + /* enable ready input */ bits |= PLX_DMA_EN_READYIN_BIT; - // enable dma chaining + /* enable dma chaining */ bits |= PLX_EN_CHAIN_BIT; - // enable interrupt on dma done (probably don't need this, since chain never finishes) + /* 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) + /* 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 + /* route dma interrupt to pci bus */ bits |= PLX_DMA_INTR_PCI_BIT; - // enable demand mode + /* enable demand mode */ bits |= PLX_DEMAND_MODE_BIT; - // enable local burst mode + /* 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); @@ -484,7 +484,7 @@ static int init_hpdi(struct comedi_device * dev) writel(0, priv(dev)->hpdi_iobase + INTERRUPT_CONTROL_REG); - // enable interrupts + /* enable interrupts */ plx_intcsr_bits = ICS_AERR | ICS_PERR | ICS_PIE | ICS_PLIE | ICS_PAIE | ICS_LIE | ICS_DMA0_E; @@ -493,7 +493,7 @@ static int init_hpdi(struct comedi_device * dev) return 0; } -// setup dma descriptors so a link completes every 'transfer_size' bytes +/* setup dma descriptors so a link completes every 'transfer_size' bytes */ static int setup_dma_descriptors(struct comedi_device * dev, unsigned int transfer_size) { @@ -545,7 +545,7 @@ static int setup_dma_descriptors(struct comedi_device * dev, (unsigned long)priv(dev)->dma_desc[i].next); } priv(dev)->num_dma_descriptors = i; - // fix last descriptor to point back to first + /* 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, @@ -573,9 +573,9 @@ static int hpdi_attach(struct comedi_device * dev, struct comedi_devconfig * it) 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? + /* was a particular bus/slot requested? */ if (it->options[0] || it->options[1]) { - // are we on the wrong bus/slot? + /* are we on the wrong bus/slot? */ if (pcidev->bus->number != it->options[0] || PCI_SLOT(pcidev->devfn) != it->options[1]) @@ -603,7 +603,7 @@ static int hpdi_attach(struct comedi_device * dev, struct comedi_devconfig * it) } pci_set_master(pcidev); - //Initialize dev->board_name + /* Initialize dev->board_name */ dev->board_name = board(dev)->name; priv(dev)->plx9080_phys_iobase = @@ -611,7 +611,7 @@ static int hpdi_attach(struct comedi_device * dev, struct comedi_devconfig * it) priv(dev)->hpdi_phys_iobase = pci_resource_start(pcidev, HPDI_BADDRINDEX); - // remap, won't work with 2.0 kernels but who cares + /* 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, @@ -626,7 +626,7 @@ static int hpdi_attach(struct comedi_device * dev, struct comedi_devconfig * it) init_plx9080(dev); - // get irq + /* get irq */ if (comedi_request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED, driver_hpdi.driver_name, dev)) { printk(" unable to allocate irq %u\n", pcidev->irq); @@ -636,7 +636,7 @@ static int hpdi_attach(struct comedi_device * dev, struct comedi_devconfig * it) printk(" irq %u\n", dev->irq); - // alocate pci dma buffers + /* 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, @@ -645,7 +645,7 @@ static int hpdi_attach(struct comedi_device * dev, struct comedi_devconfig * it) priv(dev)->dio_buffer[i], (unsigned long)priv(dev)->dio_buffer_phys_addr[i]); } - // allocate dma descriptors + /* 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); @@ -681,7 +681,7 @@ static int hpdi_detach(struct comedi_device * dev) } if (priv(dev)->hpdi_iobase) iounmap((void *)priv(dev)->hpdi_iobase); - // free pci dma buffers + /* 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, @@ -690,7 +690,7 @@ static int hpdi_detach(struct comedi_device * dev) priv(dev)-> dio_buffer_phys_addr[i]); } - // free dma descriptors + /* free dma descriptors */ if (priv(dev)->dma_desc) pci_free_consistent(priv(dev)->hw_dev, sizeof(struct plx_dma_desc) * @@ -761,7 +761,7 @@ static int di_cmd_test(struct comedi_device * dev, struct comedi_subdevice * s, /* step 2: make sure trigger sources are unique and mutually compatible */ - // uniqueness check + /* uniqueness check */ if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE) err++; @@ -807,7 +807,7 @@ static int di_cmd_test(struct comedi_device * dev, struct comedi_subdevice * s, if (cmd->chanlist) { for (i = 1; i < cmd->chanlist_len; i++) { if (CR_CHAN(cmd->chanlist[i]) != i) { - // XXX could support 8 channels or 16 channels + /* XXX could support 8 channels or 16 channels */ comedi_error(dev, "chanlist must be channels 0 to 31 in order"); err++; @@ -860,15 +860,15 @@ static int di_cmd(struct comedi_device * dev, struct comedi_subdevice * s) 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 + /* 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 + /* spinlock for plx dma control/status reg */ comedi_spin_lock_irqsave(&dev->spinlock, flags); - // enable dma transfer + /* 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); comedi_spin_unlock_irqrestore(&dev->spinlock, flags); @@ -878,10 +878,10 @@ static int di_cmd(struct comedi_device * dev, struct comedi_subdevice * s) else priv(dev)->dio_count = 1; - // clear over/under run status flags + /* clear over/under run status flags */ writel(RX_UNDERRUN_BIT | RX_OVERRUN_BIT, priv(dev)->hpdi_iobase + BOARD_STATUS_REG); - // enable interrupts + /* enable interrupts */ writel(intr_bit(RX_FULL_INTR), priv(dev)->hpdi_iobase + INTERRUPT_CONTROL_REG); @@ -914,7 +914,7 @@ static void drain_dma_buffers(struct comedi_device * dev, unsigned int channel) pci_addr_reg = priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG; - // loop until we have read all the full buffers + /* loop until we have read all the full buffers */ j = 0; for (next_transfer_addr = readl(pci_addr_reg); (next_transfer_addr < @@ -925,7 +925,7 @@ static void drain_dma_buffers(struct comedi_device * dev, unsigned int channel) 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 + /* 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) @@ -942,7 +942,7 @@ static void drain_dma_buffers(struct comedi_device * dev, unsigned int channel) 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 + /* XXX check for buffer overrun somehow */ } static irqreturn_t handle_interrupt(int irq, void *d PT_REGS_ARG) @@ -975,10 +975,10 @@ static irqreturn_t handle_interrupt(int irq, void *d PT_REGS_ARG) writel(hpdi_intr_status, priv(dev)->hpdi_iobase + INTERRUPT_STATUS_REG); } - // spin lock makes sure noone else changes plx dma control reg + /* spin lock makes sure noone else changes plx dma control reg */ comedi_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 + 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); @@ -990,11 +990,11 @@ static irqreturn_t handle_interrupt(int irq, void *d PT_REGS_ARG) } comedi_spin_unlock_irqrestore(&dev->spinlock, flags); - // spin lock makes sure noone else changes plx dma control reg + /* spin lock makes sure noone else changes plx dma control reg */ comedi_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 + 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); @@ -1003,8 +1003,8 @@ static irqreturn_t handle_interrupt(int irq, void *d PT_REGS_ARG) } comedi_spin_unlock_irqrestore(&dev->spinlock, flags); - // clear possible plx9080 interrupt sources - if (plx_status & ICS_LDIA) { // clear local doorbell interrupt + /* 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); @@ -1040,7 +1040,7 @@ void abort_dma(struct comedi_device * dev, unsigned int channel) { unsigned long flags; - // spinlock for plx dma control/status reg + /* spinlock for plx dma control/status reg */ comedi_spin_lock_irqsave(&dev->spinlock, flags); plx9080_abort_dma(priv(dev)->plx9080_iobase, channel); |