From martyn.welch@ge.com Thu Feb 25 10:10:11 2010 From: Martyn Welch Date: Thu, 18 Feb 2010 15:13:25 +0000 Subject: Staging: vme: add ca91cx42 dma support To: gregkh@suse.de Cc: devel@linuxdriverproject.org Message-ID: <20100218151325.10665.74736.stgit@ES-J7S4D2J.amer.consind.ge.com> Add support for the DMA controller in the ca91cx42 bridge. Signed-off-by: Martyn Welch Signed-off-by: Greg Kroah-Hartman --- drivers/staging/vme/TODO | 1 drivers/staging/vme/bridges/Kconfig | 1 drivers/staging/vme/bridges/vme_ca91cx42.c | 599 ++++++++++++----------------- drivers/staging/vme/bridges/vme_ca91cx42.h | 93 +++- 4 files changed, 327 insertions(+), 367 deletions(-) --- a/drivers/staging/vme/TODO +++ b/drivers/staging/vme/TODO @@ -56,7 +56,6 @@ Tempe (tsi148) Universe II (ca91c142) ---------------------- -- DMA unsupported. - RMW transactions unsupported. - Mailboxes unsupported. - Error Detection. --- a/drivers/staging/vme/bridges/Kconfig +++ b/drivers/staging/vme/bridges/Kconfig @@ -2,6 +2,7 @@ comment "VME Bridge Drivers" config VME_CA91CX42 tristate "Universe II" + depends on VIRT_TO_BUS help If you say Y here you get support for the Tundra CA91C142 (Universe II) VME bridge chip. --- a/drivers/staging/vme/bridges/vme_ca91cx42.c +++ b/drivers/staging/vme/bridges/vme_ca91cx42.c @@ -592,8 +592,8 @@ err_name: } /* - * * Free and unmap PCI Resource - * */ + * Free and unmap PCI Resource + */ static void ca91cx42_free_resource(struct vme_master_resource *image) { iounmap(image->kern_base); @@ -899,6 +899,261 @@ ssize_t ca91cx42_master_write(struct vme return retval; } +int ca91cx42_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src, + struct vme_dma_attr *dest, size_t count) +{ + struct ca91cx42_dma_entry *entry, *prev; + struct vme_dma_pci *pci_attr; + struct vme_dma_vme *vme_attr; + dma_addr_t desc_ptr; + int retval = 0; + + /* XXX descriptor must be aligned on 64-bit boundaries */ + entry = (struct ca91cx42_dma_entry *) + kmalloc(sizeof(struct ca91cx42_dma_entry), GFP_KERNEL); + if (entry == NULL) { + printk(KERN_ERR "Failed to allocate memory for dma resource " + "structure\n"); + retval = -ENOMEM; + goto err_mem; + } + + /* Test descriptor alignment */ + if ((unsigned long)&(entry->descriptor) & CA91CX42_DCPP_M) { + printk("Descriptor not aligned to 16 byte boundary as " + "required: %p\n", &(entry->descriptor)); + retval = -EINVAL; + goto err_align; + } + + memset(&(entry->descriptor), 0, sizeof(struct ca91cx42_dma_descriptor)); + + if (dest->type == VME_DMA_VME) { + entry->descriptor.dctl |= CA91CX42_DCTL_L2V; + vme_attr = (struct vme_dma_vme *)dest->private; + pci_attr = (struct vme_dma_pci *)src->private; + } else { + vme_attr = (struct vme_dma_vme *)src->private; + pci_attr = (struct vme_dma_pci *)dest->private; + } + + /* Check we can do fullfill required attributes */ + if ((vme_attr->aspace & ~(VME_A16 | VME_A24 | VME_A32 | VME_USER1 | + VME_USER2)) != 0) { + + printk(KERN_ERR "Unsupported cycle type\n"); + retval = -EINVAL; + goto err_aspace; + } + + if ((vme_attr->cycle & ~(VME_SCT | VME_BLT | VME_SUPER | VME_USER | + VME_PROG | VME_DATA)) != 0) { + + printk(KERN_ERR "Unsupported cycle type\n"); + retval = -EINVAL; + goto err_cycle; + } + + /* Check to see if we can fullfill source and destination */ + if (!(((src->type == VME_DMA_PCI) && (dest->type == VME_DMA_VME)) || + ((src->type == VME_DMA_VME) && (dest->type == VME_DMA_PCI)))) { + + printk(KERN_ERR "Cannot perform transfer with this " + "source-destination combination\n"); + retval = -EINVAL; + goto err_direct; + } + + /* Setup cycle types */ + if (vme_attr->cycle & VME_BLT) + entry->descriptor.dctl |= CA91CX42_DCTL_VCT_BLT; + + /* Setup data width */ + switch (vme_attr->dwidth) { + case VME_D8: + entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D8; + break; + case VME_D16: + entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D16; + break; + case VME_D32: + entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D32; + break; + case VME_D64: + entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D64; + break; + default: + printk(KERN_ERR "Invalid data width\n"); + return -EINVAL; + } + + /* Setup address space */ + switch (vme_attr->aspace) { + case VME_A16: + entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A16; + break; + case VME_A24: + entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A24; + break; + case VME_A32: + entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A32; + break; + case VME_USER1: + entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER1; + break; + case VME_USER2: + entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER2; + break; + default: + printk(KERN_ERR "Invalid address space\n"); + return -EINVAL; + break; + } + + if (vme_attr->cycle & VME_SUPER) + entry->descriptor.dctl |= CA91CX42_DCTL_SUPER_SUPR; + if (vme_attr->cycle & VME_PROG) + entry->descriptor.dctl |= CA91CX42_DCTL_PGM_PGM; + + entry->descriptor.dtbc = count; + entry->descriptor.dla = pci_attr->address; + entry->descriptor.dva = vme_attr->address; + entry->descriptor.dcpp = CA91CX42_DCPP_NULL; + + /* Add to list */ + list_add_tail(&(entry->list), &(list->entries)); + + /* Fill out previous descriptors "Next Address" */ + if (entry->list.prev != &(list->entries)) { + prev = list_entry(entry->list.prev, struct ca91cx42_dma_entry, + list); + /* We need the bus address for the pointer */ + desc_ptr = virt_to_bus(&(entry->descriptor)); + prev->descriptor.dcpp = desc_ptr & ~CA91CX42_DCPP_M; + } + + return 0; + +err_cycle: +err_aspace: +err_direct: +err_align: + kfree(entry); +err_mem: + return retval; +} + +static int ca91cx42_dma_busy(struct vme_bridge *ca91cx42_bridge) +{ + u32 tmp; + struct ca91cx42_driver *bridge; + + bridge = ca91cx42_bridge->driver_priv; + + tmp = ioread32(bridge->base + DGCS); + + if (tmp & CA91CX42_DGCS_ACT) + return 0; + else + return 1; +} + +int ca91cx42_dma_list_exec(struct vme_dma_list *list) +{ + struct vme_dma_resource *ctrlr; + struct ca91cx42_dma_entry *entry; + int retval = 0; + dma_addr_t bus_addr; + u32 val; + + struct ca91cx42_driver *bridge; + + ctrlr = list->parent; + + bridge = ctrlr->parent->driver_priv; + + mutex_lock(&(ctrlr->mtx)); + + if (!(list_empty(&(ctrlr->running)))) { + /* + * XXX We have an active DMA transfer and currently haven't + * sorted out the mechanism for "pending" DMA transfers. + * Return busy. + */ + /* Need to add to pending here */ + mutex_unlock(&(ctrlr->mtx)); + return -EBUSY; + } else { + list_add(&(list->list), &(ctrlr->running)); + } + + /* Get first bus address and write into registers */ + entry = list_first_entry(&(list->entries), struct ca91cx42_dma_entry, + list); + + bus_addr = virt_to_bus(&(entry->descriptor)); + + mutex_unlock(&(ctrlr->mtx)); + + iowrite32(0, bridge->base + DTBC); + iowrite32(bus_addr & ~CA91CX42_DCPP_M, bridge->base + DCPP); + + /* Start the operation */ + val = ioread32(bridge->base + DGCS); + + /* XXX Could set VMEbus On and Off Counters here */ + val &= (CA91CX42_DGCS_VON_M | CA91CX42_DGCS_VOFF_M); + + val |= (CA91CX42_DGCS_CHAIN | CA91CX42_DGCS_STOP | CA91CX42_DGCS_HALT | + CA91CX42_DGCS_DONE | CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR | + CA91CX42_DGCS_PERR); + + iowrite32(val, bridge->base + DGCS); + + val |= CA91CX42_DGCS_GO; + + iowrite32(val, bridge->base + DGCS); + + wait_event_interruptible(bridge->dma_queue, + ca91cx42_dma_busy(ctrlr->parent)); + + /* + * Read status register, this register is valid until we kick off a + * new transfer. + */ + val = ioread32(bridge->base + DGCS); + + if (val & (CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR | + CA91CX42_DGCS_PERR)) { + + printk(KERN_ERR "ca91c042: DMA Error. DGCS=%08X\n", val); + val = ioread32(bridge->base + DCTL); + } + + /* Remove list from running list */ + mutex_lock(&(ctrlr->mtx)); + list_del(&(list->list)); + mutex_unlock(&(ctrlr->mtx)); + + return retval; + +} + +int ca91cx42_dma_list_empty(struct vme_dma_list *list) +{ + struct list_head *pos, *temp; + struct ca91cx42_dma_entry *entry; + + /* detach and free each entry */ + list_for_each_safe(pos, temp, &(list->entries)) { + list_del(pos); + entry = list_entry(pos, struct ca91cx42_dma_entry, list); + kfree(entry); + } + + return 0; +} + /* * All 4 location monitors reside at the same base - this is therefore a * system wide configuration. @@ -1203,9 +1458,7 @@ static int ca91cx42_probe(struct pci_dev struct ca91cx42_driver *ca91cx42_device; struct vme_master_resource *master_image; struct vme_slave_resource *slave_image; -#if 0 struct vme_dma_resource *dma_ctrlr; -#endif struct vme_lm_resource *lm; /* We want to support more than one of each bridge so we need to @@ -1336,7 +1589,7 @@ static int ca91cx42_probe(struct pci_dev list_add_tail(&(slave_image->list), &(ca91cx42_bridge->slave_resources)); } -#if 0 + /* Add dma engines to list */ INIT_LIST_HEAD(&(ca91cx42_bridge->dma_resources)); for (i = 0; i < CA91C142_MAX_DMA; i++) { @@ -1359,7 +1612,7 @@ static int ca91cx42_probe(struct pci_dev list_add_tail(&(dma_ctrlr->list), &(ca91cx42_bridge->dma_resources)); } -#endif + /* Add location monitor to list */ INIT_LIST_HEAD(&(ca91cx42_bridge->lm_resources)); lm = kmalloc(sizeof(struct vme_lm_resource), GFP_KERNEL); @@ -1384,10 +1637,10 @@ static int ca91cx42_probe(struct pci_dev ca91cx42_bridge->master_write = ca91cx42_master_write; #if 0 ca91cx42_bridge->master_rmw = ca91cx42_master_rmw; +#endif ca91cx42_bridge->dma_list_add = ca91cx42_dma_list_add; ca91cx42_bridge->dma_list_exec = ca91cx42_dma_list_exec; ca91cx42_bridge->dma_list_empty = ca91cx42_dma_list_empty; -#endif ca91cx42_bridge->irq_set = ca91cx42_irq_set; ca91cx42_bridge->irq_generate = ca91cx42_irq_generate; ca91cx42_bridge->lm_set = ca91cx42_lm_set; @@ -1436,7 +1689,6 @@ err_lm: list_del(pos); kfree(lm); } -#if 0 err_dma: /* resources are stored in link list */ list_for_each(pos, &(ca91cx42_bridge->dma_resources)) { @@ -1444,7 +1696,6 @@ err_dma: list_del(pos); kfree(dma_ctrlr); } -#endif err_slave: /* resources are stored in link list */ list_for_each(pos, &(ca91cx42_bridge->slave_resources)) { @@ -1575,7 +1826,6 @@ module_exit(ca91cx42_exit); *--------------------------------------------------------------------------*/ #if 0 -#define SWIZZLE(X) ( ((X & 0xFF000000) >> 24) | ((X & 0x00FF0000) >> 8) | ((X & 0x0000FF00) << 8) | ((X & 0x000000FF) << 24)) int ca91cx42_master_rmw(vmeRmwCfg_t *vmeRmw) { @@ -1659,335 +1909,6 @@ int ca91cx42_master_rmw(vmeRmwCfg_t *vme return 0; } -int uniSetupDctlReg(vmeDmaPacket_t * vmeDma, int *dctlregreturn) -{ - unsigned int dctlreg = 0x80; - struct vmeAttr *vmeAttr; - - if (vmeDma->srcBus == VME_DMA_VME) { - dctlreg = 0; - vmeAttr = &vmeDma->srcVmeAttr; - } else { - dctlreg = 0x80000000; - vmeAttr = &vmeDma->dstVmeAttr; - } - - switch (vmeAttr->maxDataWidth) { - case VME_D8: - break; - case VME_D16: - dctlreg |= 0x00400000; - break; - case VME_D32: - dctlreg |= 0x00800000; - break; - case VME_D64: - dctlreg |= 0x00C00000; - break; - } - - switch (vmeAttr->addrSpace) { - case VME_A16: - break; - case VME_A24: - dctlreg |= 0x00010000; - break; - case VME_A32: - dctlreg |= 0x00020000; - break; - case VME_USER1: - dctlreg |= 0x00060000; - break; - case VME_USER2: - dctlreg |= 0x00070000; - break; - - case VME_A64: /* not supported in Universe DMA */ - case VME_CRCSR: - case VME_USER3: - case VME_USER4: - return -EINVAL; - break; - } - if (vmeAttr->userAccessType == VME_PROG) { - dctlreg |= 0x00004000; - } - if (vmeAttr->dataAccessType == VME_SUPER) { - dctlreg |= 0x00001000; - } - if (vmeAttr->xferProtocol != VME_SCT) { - dctlreg |= 0x00000100; - } - *dctlregreturn = dctlreg; - return 0; -} - -unsigned int -ca91cx42_start_dma(int channel, unsigned int dgcsreg, TDMA_Cmd_Packet *vmeLL) -{ - unsigned int val; - - /* Setup registers as needed for direct or chained. */ - if (dgcsreg & 0x8000000) { - iowrite32(0, bridge->base + DTBC); - iowrite32((unsigned int)vmeLL, bridge->base + DCPP); - } else { -#if 0 - printk(KERN_ERR "Starting: DGCS = %08x\n", dgcsreg); - printk(KERN_ERR "Starting: DVA = %08x\n", - ioread32(&vmeLL->dva)); - printk(KERN_ERR "Starting: DLV = %08x\n", - ioread32(&vmeLL->dlv)); - printk(KERN_ERR "Starting: DTBC = %08x\n", - ioread32(&vmeLL->dtbc)); - printk(KERN_ERR "Starting: DCTL = %08x\n", - ioread32(&vmeLL->dctl)); -#endif - /* Write registers */ - iowrite32(ioread32(&vmeLL->dva), bridge->base + DVA); - iowrite32(ioread32(&vmeLL->dlv), bridge->base + DLA); - iowrite32(ioread32(&vmeLL->dtbc), bridge->base + DTBC); - iowrite32(ioread32(&vmeLL->dctl), bridge->base + DCTL); - iowrite32(0, bridge->base + DCPP); - } - - /* Start the operation */ - iowrite32(dgcsreg, bridge->base + DGCS); - val = get_tbl(); - iowrite32(dgcsreg | 0x8000000F, bridge->base + DGCS); - return val; -} - -TDMA_Cmd_Packet *ca91cx42_setup_dma(vmeDmaPacket_t * vmeDma) -{ - vmeDmaPacket_t *vmeCur; - int maxPerPage; - int currentLLcount; - TDMA_Cmd_Packet *startLL; - TDMA_Cmd_Packet *currentLL; - TDMA_Cmd_Packet *nextLL; - unsigned int dctlreg = 0; - - maxPerPage = PAGESIZE / sizeof(TDMA_Cmd_Packet) - 1; - startLL = (TDMA_Cmd_Packet *) __get_free_pages(GFP_KERNEL, 0); - if (startLL == 0) { - return startLL; - } - /* First allocate pages for descriptors and create linked list */ - vmeCur = vmeDma; - currentLL = startLL; - currentLLcount = 0; - while (vmeCur != 0) { - if (vmeCur->pNextPacket != 0) { - currentLL->dcpp = (unsigned int)(currentLL + 1); - currentLLcount++; - if (currentLLcount >= maxPerPage) { - currentLL->dcpp = - __get_free_pages(GFP_KERNEL, 0); - currentLLcount = 0; - } - currentLL = (TDMA_Cmd_Packet *) currentLL->dcpp; - } else { - currentLL->dcpp = (unsigned int)0; - } - vmeCur = vmeCur->pNextPacket; - } - - /* Next fill in information for each descriptor */ - vmeCur = vmeDma; - currentLL = startLL; - while (vmeCur != 0) { - if (vmeCur->srcBus == VME_DMA_VME) { - iowrite32(vmeCur->srcAddr, ¤tLL->dva); - iowrite32(vmeCur->dstAddr, ¤tLL->dlv); - } else { - iowrite32(vmeCur->srcAddr, ¤tLL->dlv); - iowrite32(vmeCur->dstAddr, ¤tLL->dva); - } - uniSetupDctlReg(vmeCur, &dctlreg); - iowrite32(dctlreg, ¤tLL->dctl); - iowrite32(vmeCur->byteCount, ¤tLL->dtbc); - - currentLL = (TDMA_Cmd_Packet *) currentLL->dcpp; - vmeCur = vmeCur->pNextPacket; - } - - /* Convert Links to PCI addresses. */ - currentLL = startLL; - while (currentLL != 0) { - nextLL = (TDMA_Cmd_Packet *) currentLL->dcpp; - if (nextLL == 0) { - iowrite32(1, ¤tLL->dcpp); - } else { - iowrite32((unsigned int)virt_to_bus(nextLL), - ¤tLL->dcpp); - } - currentLL = nextLL; - } - - /* Return pointer to descriptors list */ - return startLL; -} - -int ca91cx42_free_dma(TDMA_Cmd_Packet *startLL) -{ - TDMA_Cmd_Packet *currentLL; - TDMA_Cmd_Packet *prevLL; - TDMA_Cmd_Packet *nextLL; - unsigned int dcppreg; - - /* Convert Links to virtual addresses. */ - currentLL = startLL; - while (currentLL != 0) { - dcppreg = ioread32(¤tLL->dcpp); - dcppreg &= ~6; - if (dcppreg & 1) { - currentLL->dcpp = 0; - } else { - currentLL->dcpp = (unsigned int)bus_to_virt(dcppreg); - } - currentLL = (TDMA_Cmd_Packet *) currentLL->dcpp; - } - - /* Free all pages associated with the descriptors. */ - currentLL = startLL; - prevLL = currentLL; - while (currentLL != 0) { - nextLL = (TDMA_Cmd_Packet *) currentLL->dcpp; - if (currentLL + 1 != nextLL) { - free_pages((int)prevLL, 0); - prevLL = nextLL; - } - currentLL = nextLL; - } - - /* Return pointer to descriptors list */ - return 0; -} - -int ca91cx42_do_dma(vmeDmaPacket_t *vmeDma) -{ - unsigned int dgcsreg = 0; - unsigned int dctlreg = 0; - int val; - int channel, x; - vmeDmaPacket_t *curDma; - TDMA_Cmd_Packet *dmaLL; - - /* Sanity check the VME chain. */ - channel = vmeDma->channel_number; - if (channel > 0) { - return -EINVAL; - } - curDma = vmeDma; - while (curDma != 0) { - if (curDma->byteCount == 0) { - return -EINVAL; - } - if (curDma->byteCount >= 0x1000000) { - return -EINVAL; - } - if ((curDma->srcAddr & 7) != (curDma->dstAddr & 7)) { - return -EINVAL; - } - switch (curDma->srcBus) { - case VME_DMA_PCI: - if (curDma->dstBus != VME_DMA_VME) { - return -EINVAL; - } - break; - case VME_DMA_VME: - if (curDma->dstBus != VME_DMA_PCI) { - return -EINVAL; - } - break; - default: - return -EINVAL; - break; - } - if (uniSetupDctlReg(curDma, &dctlreg) < 0) { - return -EINVAL; - } - - curDma = curDma->pNextPacket; - if (curDma == vmeDma) { /* Endless Loop! */ - return -EINVAL; - } - } - - /* calculate control register */ - if (vmeDma->pNextPacket != 0) { - dgcsreg = 0x8000000; - } else { - dgcsreg = 0; - } - - for (x = 0; x < 8; x++) { /* vme block size */ - if ((256 << x) >= vmeDma->maxVmeBlockSize) { - break; - } - } - if (x == 8) - x = 7; - dgcsreg |= (x << 20); - - if (vmeDma->vmeBackOffTimer) { - for (x = 1; x < 8; x++) { /* vme timer */ - if ((16 << (x - 1)) >= vmeDma->vmeBackOffTimer) { - break; - } - } - if (x == 8) - x = 7; - dgcsreg |= (x << 16); - } - /*` Setup the dma chain */ - dmaLL = ca91cx42_setup_dma(vmeDma); - - /* Start the DMA */ - if (dgcsreg & 0x8000000) { - vmeDma->vmeDmaStartTick = - ca91cx42_start_dma(channel, dgcsreg, - (TDMA_Cmd_Packet *) virt_to_phys(dmaLL)); - } else { - vmeDma->vmeDmaStartTick = - ca91cx42_start_dma(channel, dgcsreg, dmaLL); - } - - wait_event_interruptible(dma_queue, - ioread32(bridge->base + DGCS) & 0x800); - - val = ioread32(bridge->base + DGCS); - iowrite32(val | 0xF00, bridge->base + DGCS); - - vmeDma->vmeDmaStatus = 0; - - if (!(val & 0x00000800)) { - vmeDma->vmeDmaStatus = val & 0x700; - printk(KERN_ERR "ca91c042: DMA Error in ca91cx42_DMA_irqhandler" - " DGCS=%08X\n", val); - val = ioread32(bridge->base + DCPP); - printk(KERN_ERR "ca91c042: DCPP=%08X\n", val); - val = ioread32(bridge->base + DCTL); - printk(KERN_ERR "ca91c042: DCTL=%08X\n", val); - val = ioread32(bridge->base + DTBC); - printk(KERN_ERR "ca91c042: DTBC=%08X\n", val); - val = ioread32(bridge->base + DLA); - printk(KERN_ERR "ca91c042: DLA=%08X\n", val); - val = ioread32(bridge->base + DVA); - printk(KERN_ERR "ca91c042: DVA=%08X\n", val); - - } - /* Free the dma chain */ - ca91cx42_free_dma(dmaLL); - - return 0; -} - - - - - int ca91cx42_set_arbiter(vmeArbiterCfg_t *vmeArb) { int temp_ctl = 0; --- a/drivers/staging/vme/bridges/vme_ca91cx42.h +++ b/drivers/staging/vme/bridges/vme_ca91cx42.h @@ -57,7 +57,7 @@ struct ca91cx42_driver { struct ca91cx42_dma_descriptor { unsigned int dctl; /* DMA Control */ unsigned int dtbc; /* Transfer Byte Count */ - unsigned int dlv; /* PCI Address */ + unsigned int dla; /* PCI Address */ unsigned int res1; /* Reserved */ unsigned int dva; /* Vme Address */ unsigned int res2; /* Reserved */ @@ -253,32 +253,6 @@ static const int CA91CX42_VSI_TO[] = { V #define VCSR_SET 0x0FF8 #define VCSR_BS 0x0FFC -// DMA General Control/Status Register DGCS (0x220) -// 32-24 || GO | STOPR | HALTR | 0 || CHAIN | 0 | 0 | 0 || -// 23-16 || VON || VOFF || -// 15-08 || ACT | STOP | HALT | 0 || DONE | LERR | VERR | P_ERR || -// 07-00 || 0 | INT_S | INT_H | 0 || I_DNE | I_LER | I_VER | I_PER || - -// VON - Length Per DMA VMEBus Transfer -// 0000 = None -// 0001 = 256 Bytes -// 0010 = 512 -// 0011 = 1024 -// 0100 = 2048 -// 0101 = 4096 -// 0110 = 8192 -// 0111 = 16384 - -// VOFF - wait between DMA tenures -// 0000 = 0 us -// 0001 = 16 -// 0010 = 32 -// 0011 = 64 -// 0100 = 128 -// 0101 = 256 -// 0110 = 512 -// 0111 = 1024 - /* * PCI Class Register * offset 008 @@ -371,6 +345,71 @@ static const int CA91CX42_VSI_TO[] = { V #define CA91CX42_BM_SLSI_RESERVED 0x3F0F0000 /* + * DCTL Register + * offset 200 + */ +#define CA91CX42_DCTL_L2V (1<<31) +#define CA91CX42_DCTL_VDW_M (3<<22) +#define CA91CX42_DCTL_VDW_M (3<<22) +#define CA91CX42_DCTL_VDW_D8 0 +#define CA91CX42_DCTL_VDW_D16 (1<<22) +#define CA91CX42_DCTL_VDW_D32 (1<<23) +#define CA91CX42_DCTL_VDW_D64 (3<<22) + +#define CA91CX42_DCTL_VAS_M (7<<16) +#define CA91CX42_DCTL_VAS_A16 0 +#define CA91CX42_DCTL_VAS_A24 (1<<16) +#define CA91CX42_DCTL_VAS_A32 (1<<17) +#define CA91CX42_DCTL_VAS_USER1 (3<<17) +#define CA91CX42_DCTL_VAS_USER2 (7<<16) + +#define CA91CX42_DCTL_PGM_M (1<<14) +#define CA91CX42_DCTL_PGM_DATA 0 +#define CA91CX42_DCTL_PGM_PGM (1<<14) + +#define CA91CX42_DCTL_SUPER_M (1<<12) +#define CA91CX42_DCTL_SUPER_NPRIV 0 +#define CA91CX42_DCTL_SUPER_SUPR (1<<12) + +#define CA91CX42_DCTL_VCT_M (1<<8) +#define CA91CX42_DCTL_VCT_BLT (1<<8) +#define CA91CX42_DCTL_LD64EN (1<<7) + +/* + * DCPP Register + * offset 218 + */ +#define CA91CX42_DCPP_M 0xf +#define CA91CX42_DCPP_NULL (1<<0) + +/* + * DMA General Control/Status Register (DGCS) + * offset 220 + */ +#define CA91CX42_DGCS_GO (1<<31) +#define CA91CX42_DGCS_STOP_REQ (1<<30) +#define CA91CX42_DGCS_HALT_REQ (1<<29) +#define CA91CX42_DGCS_CHAIN (1<<27) + +#define CA91CX42_DGCS_VON_M (7<<20) + +#define CA91CX42_DGCS_VOFF_M (0xf<<16) + +#define CA91CX42_DGCS_ACT (1<<15) +#define CA91CX42_DGCS_STOP (1<<14) +#define CA91CX42_DGCS_HALT (1<<13) +#define CA91CX42_DGCS_DONE (1<<11) +#define CA91CX42_DGCS_LERR (1<<10) +#define CA91CX42_DGCS_VERR (1<<9) +#define CA91CX42_DGCS_PERR (1<<8) +#define CA91CX42_DGCS_INT_STOP (1<<6) +#define CA91CX42_DGCS_INT_HALT (1<<5) +#define CA91CX42_DGCS_INT_DONE (1<<3) +#define CA91CX42_DGCS_INT_LERR (1<<2) +#define CA91CX42_DGCS_INT_VERR (1<<1) +#define CA91CX42_DGCS_INT_PERR (1<<0) + +/* * PCI Interrupt Enable Register * offset 300 */