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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/vme/bridges/vme_ca91cx42.c
Initial import
Diffstat (limited to 'drivers/vme/bridges/vme_ca91cx42.c')
-rw-r--r--drivers/vme/bridges/vme_ca91cx42.c1947
1 files changed, 1947 insertions, 0 deletions
diff --git a/drivers/vme/bridges/vme_ca91cx42.c b/drivers/vme/bridges/vme_ca91cx42.c
new file mode 100644
index 000000000..18078ecbf
--- /dev/null
+++ b/drivers/vme/bridges/vme_ca91cx42.c
@@ -0,0 +1,1947 @@
+/*
+ * Support for the Tundra Universe I/II VME-PCI Bridge Chips
+ *
+ * Author: Martyn Welch <martyn.welch@ge.com>
+ * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
+ *
+ * Based on work by Tom Armistead and Ajit Prem
+ * Copyright 2004 Motorola Inc.
+ *
+ * Derived from ca91c042.c by Michael Wyrick
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/poll.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/vme.h>
+
+#include "../vme_bridge.h"
+#include "vme_ca91cx42.h"
+
+static int ca91cx42_probe(struct pci_dev *, const struct pci_device_id *);
+static void ca91cx42_remove(struct pci_dev *);
+
+/* Module parameters */
+static int geoid;
+
+static const char driver_name[] = "vme_ca91cx42";
+
+static const struct pci_device_id ca91cx42_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_TUNDRA, PCI_DEVICE_ID_TUNDRA_CA91C142) },
+ { },
+};
+
+static struct pci_driver ca91cx42_driver = {
+ .name = driver_name,
+ .id_table = ca91cx42_ids,
+ .probe = ca91cx42_probe,
+ .remove = ca91cx42_remove,
+};
+
+static u32 ca91cx42_DMA_irqhandler(struct ca91cx42_driver *bridge)
+{
+ wake_up(&bridge->dma_queue);
+
+ return CA91CX42_LINT_DMA;
+}
+
+static u32 ca91cx42_LM_irqhandler(struct ca91cx42_driver *bridge, u32 stat)
+{
+ int i;
+ u32 serviced = 0;
+
+ for (i = 0; i < 4; i++) {
+ if (stat & CA91CX42_LINT_LM[i]) {
+ /* We only enable interrupts if the callback is set */
+ bridge->lm_callback[i](i);
+ serviced |= CA91CX42_LINT_LM[i];
+ }
+ }
+
+ return serviced;
+}
+
+/* XXX This needs to be split into 4 queues */
+static u32 ca91cx42_MB_irqhandler(struct ca91cx42_driver *bridge, int mbox_mask)
+{
+ wake_up(&bridge->mbox_queue);
+
+ return CA91CX42_LINT_MBOX;
+}
+
+static u32 ca91cx42_IACK_irqhandler(struct ca91cx42_driver *bridge)
+{
+ wake_up(&bridge->iack_queue);
+
+ return CA91CX42_LINT_SW_IACK;
+}
+
+static u32 ca91cx42_VERR_irqhandler(struct vme_bridge *ca91cx42_bridge)
+{
+ int val;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ val = ioread32(bridge->base + DGCS);
+
+ if (!(val & 0x00000800)) {
+ dev_err(ca91cx42_bridge->parent, "ca91cx42_VERR_irqhandler DMA "
+ "Read Error DGCS=%08X\n", val);
+ }
+
+ return CA91CX42_LINT_VERR;
+}
+
+static u32 ca91cx42_LERR_irqhandler(struct vme_bridge *ca91cx42_bridge)
+{
+ int val;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ val = ioread32(bridge->base + DGCS);
+
+ if (!(val & 0x00000800))
+ dev_err(ca91cx42_bridge->parent, "ca91cx42_LERR_irqhandler DMA "
+ "Read Error DGCS=%08X\n", val);
+
+ return CA91CX42_LINT_LERR;
+}
+
+
+static u32 ca91cx42_VIRQ_irqhandler(struct vme_bridge *ca91cx42_bridge,
+ int stat)
+{
+ int vec, i, serviced = 0;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+
+ for (i = 7; i > 0; i--) {
+ if (stat & (1 << i)) {
+ vec = ioread32(bridge->base +
+ CA91CX42_V_STATID[i]) & 0xff;
+
+ vme_irq_handler(ca91cx42_bridge, i, vec);
+
+ serviced |= (1 << i);
+ }
+ }
+
+ return serviced;
+}
+
+static irqreturn_t ca91cx42_irqhandler(int irq, void *ptr)
+{
+ u32 stat, enable, serviced = 0;
+ struct vme_bridge *ca91cx42_bridge;
+ struct ca91cx42_driver *bridge;
+
+ ca91cx42_bridge = ptr;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ enable = ioread32(bridge->base + LINT_EN);
+ stat = ioread32(bridge->base + LINT_STAT);
+
+ /* Only look at unmasked interrupts */
+ stat &= enable;
+
+ if (unlikely(!stat))
+ return IRQ_NONE;
+
+ if (stat & CA91CX42_LINT_DMA)
+ serviced |= ca91cx42_DMA_irqhandler(bridge);
+ if (stat & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
+ CA91CX42_LINT_LM3))
+ serviced |= ca91cx42_LM_irqhandler(bridge, stat);
+ if (stat & CA91CX42_LINT_MBOX)
+ serviced |= ca91cx42_MB_irqhandler(bridge, stat);
+ if (stat & CA91CX42_LINT_SW_IACK)
+ serviced |= ca91cx42_IACK_irqhandler(bridge);
+ if (stat & CA91CX42_LINT_VERR)
+ serviced |= ca91cx42_VERR_irqhandler(ca91cx42_bridge);
+ if (stat & CA91CX42_LINT_LERR)
+ serviced |= ca91cx42_LERR_irqhandler(ca91cx42_bridge);
+ if (stat & (CA91CX42_LINT_VIRQ1 | CA91CX42_LINT_VIRQ2 |
+ CA91CX42_LINT_VIRQ3 | CA91CX42_LINT_VIRQ4 |
+ CA91CX42_LINT_VIRQ5 | CA91CX42_LINT_VIRQ6 |
+ CA91CX42_LINT_VIRQ7))
+ serviced |= ca91cx42_VIRQ_irqhandler(ca91cx42_bridge, stat);
+
+ /* Clear serviced interrupts */
+ iowrite32(serviced, bridge->base + LINT_STAT);
+
+ return IRQ_HANDLED;
+}
+
+static int ca91cx42_irq_init(struct vme_bridge *ca91cx42_bridge)
+{
+ int result, tmp;
+ struct pci_dev *pdev;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ /* Need pdev */
+ pdev = container_of(ca91cx42_bridge->parent, struct pci_dev, dev);
+
+ /* Initialise list for VME bus errors */
+ INIT_LIST_HEAD(&ca91cx42_bridge->vme_errors);
+
+ mutex_init(&ca91cx42_bridge->irq_mtx);
+
+ /* Disable interrupts from PCI to VME */
+ iowrite32(0, bridge->base + VINT_EN);
+
+ /* Disable PCI interrupts */
+ iowrite32(0, bridge->base + LINT_EN);
+ /* Clear Any Pending PCI Interrupts */
+ iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
+
+ result = request_irq(pdev->irq, ca91cx42_irqhandler, IRQF_SHARED,
+ driver_name, ca91cx42_bridge);
+ if (result) {
+ dev_err(&pdev->dev, "Can't get assigned pci irq vector %02X\n",
+ pdev->irq);
+ return result;
+ }
+
+ /* Ensure all interrupts are mapped to PCI Interrupt 0 */
+ iowrite32(0, bridge->base + LINT_MAP0);
+ iowrite32(0, bridge->base + LINT_MAP1);
+ iowrite32(0, bridge->base + LINT_MAP2);
+
+ /* Enable DMA, mailbox & LM Interrupts */
+ tmp = CA91CX42_LINT_MBOX3 | CA91CX42_LINT_MBOX2 | CA91CX42_LINT_MBOX1 |
+ CA91CX42_LINT_MBOX0 | CA91CX42_LINT_SW_IACK |
+ CA91CX42_LINT_VERR | CA91CX42_LINT_LERR | CA91CX42_LINT_DMA;
+
+ iowrite32(tmp, bridge->base + LINT_EN);
+
+ return 0;
+}
+
+static void ca91cx42_irq_exit(struct ca91cx42_driver *bridge,
+ struct pci_dev *pdev)
+{
+ struct vme_bridge *ca91cx42_bridge;
+
+ /* Disable interrupts from PCI to VME */
+ iowrite32(0, bridge->base + VINT_EN);
+
+ /* Disable PCI interrupts */
+ iowrite32(0, bridge->base + LINT_EN);
+ /* Clear Any Pending PCI Interrupts */
+ iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
+
+ ca91cx42_bridge = container_of((void *)bridge, struct vme_bridge,
+ driver_priv);
+ free_irq(pdev->irq, ca91cx42_bridge);
+}
+
+static int ca91cx42_iack_received(struct ca91cx42_driver *bridge, int level)
+{
+ u32 tmp;
+
+ tmp = ioread32(bridge->base + LINT_STAT);
+
+ if (tmp & (1 << level))
+ return 0;
+ else
+ return 1;
+}
+
+/*
+ * Set up an VME interrupt
+ */
+static void ca91cx42_irq_set(struct vme_bridge *ca91cx42_bridge, int level,
+ int state, int sync)
+
+{
+ struct pci_dev *pdev;
+ u32 tmp;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ /* Enable IRQ level */
+ tmp = ioread32(bridge->base + LINT_EN);
+
+ if (state == 0)
+ tmp &= ~CA91CX42_LINT_VIRQ[level];
+ else
+ tmp |= CA91CX42_LINT_VIRQ[level];
+
+ iowrite32(tmp, bridge->base + LINT_EN);
+
+ if ((state == 0) && (sync != 0)) {
+ pdev = container_of(ca91cx42_bridge->parent, struct pci_dev,
+ dev);
+
+ synchronize_irq(pdev->irq);
+ }
+}
+
+static int ca91cx42_irq_generate(struct vme_bridge *ca91cx42_bridge, int level,
+ int statid)
+{
+ u32 tmp;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ /* Universe can only generate even vectors */
+ if (statid & 1)
+ return -EINVAL;
+
+ mutex_lock(&bridge->vme_int);
+
+ tmp = ioread32(bridge->base + VINT_EN);
+
+ /* Set Status/ID */
+ iowrite32(statid << 24, bridge->base + STATID);
+
+ /* Assert VMEbus IRQ */
+ tmp = tmp | (1 << (level + 24));
+ iowrite32(tmp, bridge->base + VINT_EN);
+
+ /* Wait for IACK */
+ wait_event_interruptible(bridge->iack_queue,
+ ca91cx42_iack_received(bridge, level));
+
+ /* Return interrupt to low state */
+ tmp = ioread32(bridge->base + VINT_EN);
+ tmp = tmp & ~(1 << (level + 24));
+ iowrite32(tmp, bridge->base + VINT_EN);
+
+ mutex_unlock(&bridge->vme_int);
+
+ return 0;
+}
+
+static int ca91cx42_slave_set(struct vme_slave_resource *image, int enabled,
+ unsigned long long vme_base, unsigned long long size,
+ dma_addr_t pci_base, u32 aspace, u32 cycle)
+{
+ unsigned int i, addr = 0, granularity;
+ unsigned int temp_ctl = 0;
+ unsigned int vme_bound, pci_offset;
+ struct vme_bridge *ca91cx42_bridge;
+ struct ca91cx42_driver *bridge;
+
+ ca91cx42_bridge = image->parent;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ i = image->number;
+
+ switch (aspace) {
+ case VME_A16:
+ addr |= CA91CX42_VSI_CTL_VAS_A16;
+ break;
+ case VME_A24:
+ addr |= CA91CX42_VSI_CTL_VAS_A24;
+ break;
+ case VME_A32:
+ addr |= CA91CX42_VSI_CTL_VAS_A32;
+ break;
+ case VME_USER1:
+ addr |= CA91CX42_VSI_CTL_VAS_USER1;
+ break;
+ case VME_USER2:
+ addr |= CA91CX42_VSI_CTL_VAS_USER2;
+ break;
+ case VME_A64:
+ case VME_CRCSR:
+ case VME_USER3:
+ case VME_USER4:
+ default:
+ dev_err(ca91cx42_bridge->parent, "Invalid address space\n");
+ return -EINVAL;
+ break;
+ }
+
+ /*
+ * Bound address is a valid address for the window, adjust
+ * accordingly
+ */
+ vme_bound = vme_base + size;
+ pci_offset = pci_base - vme_base;
+
+ if ((i == 0) || (i == 4))
+ granularity = 0x1000;
+ else
+ granularity = 0x10000;
+
+ if (vme_base & (granularity - 1)) {
+ dev_err(ca91cx42_bridge->parent, "Invalid VME base "
+ "alignment\n");
+ return -EINVAL;
+ }
+ if (vme_bound & (granularity - 1)) {
+ dev_err(ca91cx42_bridge->parent, "Invalid VME bound "
+ "alignment\n");
+ return -EINVAL;
+ }
+ if (pci_offset & (granularity - 1)) {
+ dev_err(ca91cx42_bridge->parent, "Invalid PCI Offset "
+ "alignment\n");
+ return -EINVAL;
+ }
+
+ /* Disable while we are mucking around */
+ temp_ctl = ioread32(bridge->base + CA91CX42_VSI_CTL[i]);
+ temp_ctl &= ~CA91CX42_VSI_CTL_EN;
+ iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
+
+ /* Setup mapping */
+ iowrite32(vme_base, bridge->base + CA91CX42_VSI_BS[i]);
+ iowrite32(vme_bound, bridge->base + CA91CX42_VSI_BD[i]);
+ iowrite32(pci_offset, bridge->base + CA91CX42_VSI_TO[i]);
+
+ /* Setup address space */
+ temp_ctl &= ~CA91CX42_VSI_CTL_VAS_M;
+ temp_ctl |= addr;
+
+ /* Setup cycle types */
+ temp_ctl &= ~(CA91CX42_VSI_CTL_PGM_M | CA91CX42_VSI_CTL_SUPER_M);
+ if (cycle & VME_SUPER)
+ temp_ctl |= CA91CX42_VSI_CTL_SUPER_SUPR;
+ if (cycle & VME_USER)
+ temp_ctl |= CA91CX42_VSI_CTL_SUPER_NPRIV;
+ if (cycle & VME_PROG)
+ temp_ctl |= CA91CX42_VSI_CTL_PGM_PGM;
+ if (cycle & VME_DATA)
+ temp_ctl |= CA91CX42_VSI_CTL_PGM_DATA;
+
+ /* Write ctl reg without enable */
+ iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
+
+ if (enabled)
+ temp_ctl |= CA91CX42_VSI_CTL_EN;
+
+ iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
+
+ return 0;
+}
+
+static int ca91cx42_slave_get(struct vme_slave_resource *image, int *enabled,
+ unsigned long long *vme_base, unsigned long long *size,
+ dma_addr_t *pci_base, u32 *aspace, u32 *cycle)
+{
+ unsigned int i, granularity = 0, ctl = 0;
+ unsigned long long vme_bound, pci_offset;
+ struct ca91cx42_driver *bridge;
+
+ bridge = image->parent->driver_priv;
+
+ i = image->number;
+
+ if ((i == 0) || (i == 4))
+ granularity = 0x1000;
+ else
+ granularity = 0x10000;
+
+ /* Read Registers */
+ ctl = ioread32(bridge->base + CA91CX42_VSI_CTL[i]);
+
+ *vme_base = ioread32(bridge->base + CA91CX42_VSI_BS[i]);
+ vme_bound = ioread32(bridge->base + CA91CX42_VSI_BD[i]);
+ pci_offset = ioread32(bridge->base + CA91CX42_VSI_TO[i]);
+
+ *pci_base = (dma_addr_t)vme_base + pci_offset;
+ *size = (unsigned long long)((vme_bound - *vme_base) + granularity);
+
+ *enabled = 0;
+ *aspace = 0;
+ *cycle = 0;
+
+ if (ctl & CA91CX42_VSI_CTL_EN)
+ *enabled = 1;
+
+ if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A16)
+ *aspace = VME_A16;
+ if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A24)
+ *aspace = VME_A24;
+ if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A32)
+ *aspace = VME_A32;
+ if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_USER1)
+ *aspace = VME_USER1;
+ if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_USER2)
+ *aspace = VME_USER2;
+
+ if (ctl & CA91CX42_VSI_CTL_SUPER_SUPR)
+ *cycle |= VME_SUPER;
+ if (ctl & CA91CX42_VSI_CTL_SUPER_NPRIV)
+ *cycle |= VME_USER;
+ if (ctl & CA91CX42_VSI_CTL_PGM_PGM)
+ *cycle |= VME_PROG;
+ if (ctl & CA91CX42_VSI_CTL_PGM_DATA)
+ *cycle |= VME_DATA;
+
+ return 0;
+}
+
+/*
+ * Allocate and map PCI Resource
+ */
+static int ca91cx42_alloc_resource(struct vme_master_resource *image,
+ unsigned long long size)
+{
+ unsigned long long existing_size;
+ int retval = 0;
+ struct pci_dev *pdev;
+ struct vme_bridge *ca91cx42_bridge;
+
+ ca91cx42_bridge = image->parent;
+
+ /* Find pci_dev container of dev */
+ if (ca91cx42_bridge->parent == NULL) {
+ dev_err(ca91cx42_bridge->parent, "Dev entry NULL\n");
+ return -EINVAL;
+ }
+ pdev = container_of(ca91cx42_bridge->parent, struct pci_dev, dev);
+
+ existing_size = (unsigned long long)(image->bus_resource.end -
+ image->bus_resource.start);
+
+ /* If the existing size is OK, return */
+ if (existing_size == (size - 1))
+ return 0;
+
+ if (existing_size != 0) {
+ iounmap(image->kern_base);
+ image->kern_base = NULL;
+ kfree(image->bus_resource.name);
+ release_resource(&image->bus_resource);
+ memset(&image->bus_resource, 0, sizeof(struct resource));
+ }
+
+ if (image->bus_resource.name == NULL) {
+ image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
+ if (image->bus_resource.name == NULL) {
+ dev_err(ca91cx42_bridge->parent, "Unable to allocate "
+ "memory for resource name\n");
+ retval = -ENOMEM;
+ goto err_name;
+ }
+ }
+
+ sprintf((char *)image->bus_resource.name, "%s.%d",
+ ca91cx42_bridge->name, image->number);
+
+ image->bus_resource.start = 0;
+ image->bus_resource.end = (unsigned long)size;
+ image->bus_resource.flags = IORESOURCE_MEM;
+
+ retval = pci_bus_alloc_resource(pdev->bus,
+ &image->bus_resource, size, size, PCIBIOS_MIN_MEM,
+ 0, NULL, NULL);
+ if (retval) {
+ dev_err(ca91cx42_bridge->parent, "Failed to allocate mem "
+ "resource for window %d size 0x%lx start 0x%lx\n",
+ image->number, (unsigned long)size,
+ (unsigned long)image->bus_resource.start);
+ goto err_resource;
+ }
+
+ image->kern_base = ioremap_nocache(
+ image->bus_resource.start, size);
+ if (image->kern_base == NULL) {
+ dev_err(ca91cx42_bridge->parent, "Failed to remap resource\n");
+ retval = -ENOMEM;
+ goto err_remap;
+ }
+
+ return 0;
+
+err_remap:
+ release_resource(&image->bus_resource);
+err_resource:
+ kfree(image->bus_resource.name);
+ memset(&image->bus_resource, 0, sizeof(struct resource));
+err_name:
+ return retval;
+}
+
+/*
+ * Free and unmap PCI Resource
+ */
+static void ca91cx42_free_resource(struct vme_master_resource *image)
+{
+ iounmap(image->kern_base);
+ image->kern_base = NULL;
+ release_resource(&image->bus_resource);
+ kfree(image->bus_resource.name);
+ memset(&image->bus_resource, 0, sizeof(struct resource));
+}
+
+
+static int ca91cx42_master_set(struct vme_master_resource *image, int enabled,
+ unsigned long long vme_base, unsigned long long size, u32 aspace,
+ u32 cycle, u32 dwidth)
+{
+ int retval = 0;
+ unsigned int i, granularity = 0;
+ unsigned int temp_ctl = 0;
+ unsigned long long pci_bound, vme_offset, pci_base;
+ struct vme_bridge *ca91cx42_bridge;
+ struct ca91cx42_driver *bridge;
+
+ ca91cx42_bridge = image->parent;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ i = image->number;
+
+ if ((i == 0) || (i == 4))
+ granularity = 0x1000;
+ else
+ granularity = 0x10000;
+
+ /* Verify input data */
+ if (vme_base & (granularity - 1)) {
+ dev_err(ca91cx42_bridge->parent, "Invalid VME Window "
+ "alignment\n");
+ retval = -EINVAL;
+ goto err_window;
+ }
+ if (size & (granularity - 1)) {
+ dev_err(ca91cx42_bridge->parent, "Invalid VME Window "
+ "alignment\n");
+ retval = -EINVAL;
+ goto err_window;
+ }
+
+ spin_lock(&image->lock);
+
+ /*
+ * Let's allocate the resource here rather than further up the stack as
+ * it avoids pushing loads of bus dependent stuff up the stack
+ */
+ retval = ca91cx42_alloc_resource(image, size);
+ if (retval) {
+ spin_unlock(&image->lock);
+ dev_err(ca91cx42_bridge->parent, "Unable to allocate memory "
+ "for resource name\n");
+ retval = -ENOMEM;
+ goto err_res;
+ }
+
+ pci_base = (unsigned long long)image->bus_resource.start;
+
+ /*
+ * Bound address is a valid address for the window, adjust
+ * according to window granularity.
+ */
+ pci_bound = pci_base + size;
+ vme_offset = vme_base - pci_base;
+
+ /* Disable while we are mucking around */
+ temp_ctl = ioread32(bridge->base + CA91CX42_LSI_CTL[i]);
+ temp_ctl &= ~CA91CX42_LSI_CTL_EN;
+ iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
+
+ /* Setup cycle types */
+ temp_ctl &= ~CA91CX42_LSI_CTL_VCT_M;
+ if (cycle & VME_BLT)
+ temp_ctl |= CA91CX42_LSI_CTL_VCT_BLT;
+ if (cycle & VME_MBLT)
+ temp_ctl |= CA91CX42_LSI_CTL_VCT_MBLT;
+
+ /* Setup data width */
+ temp_ctl &= ~CA91CX42_LSI_CTL_VDW_M;
+ switch (dwidth) {
+ case VME_D8:
+ temp_ctl |= CA91CX42_LSI_CTL_VDW_D8;
+ break;
+ case VME_D16:
+ temp_ctl |= CA91CX42_LSI_CTL_VDW_D16;
+ break;
+ case VME_D32:
+ temp_ctl |= CA91CX42_LSI_CTL_VDW_D32;
+ break;
+ case VME_D64:
+ temp_ctl |= CA91CX42_LSI_CTL_VDW_D64;
+ break;
+ default:
+ spin_unlock(&image->lock);
+ dev_err(ca91cx42_bridge->parent, "Invalid data width\n");
+ retval = -EINVAL;
+ goto err_dwidth;
+ break;
+ }
+
+ /* Setup address space */
+ temp_ctl &= ~CA91CX42_LSI_CTL_VAS_M;
+ switch (aspace) {
+ case VME_A16:
+ temp_ctl |= CA91CX42_LSI_CTL_VAS_A16;
+ break;
+ case VME_A24:
+ temp_ctl |= CA91CX42_LSI_CTL_VAS_A24;
+ break;
+ case VME_A32:
+ temp_ctl |= CA91CX42_LSI_CTL_VAS_A32;
+ break;
+ case VME_CRCSR:
+ temp_ctl |= CA91CX42_LSI_CTL_VAS_CRCSR;
+ break;
+ case VME_USER1:
+ temp_ctl |= CA91CX42_LSI_CTL_VAS_USER1;
+ break;
+ case VME_USER2:
+ temp_ctl |= CA91CX42_LSI_CTL_VAS_USER2;
+ break;
+ case VME_A64:
+ case VME_USER3:
+ case VME_USER4:
+ default:
+ spin_unlock(&image->lock);
+ dev_err(ca91cx42_bridge->parent, "Invalid address space\n");
+ retval = -EINVAL;
+ goto err_aspace;
+ break;
+ }
+
+ temp_ctl &= ~(CA91CX42_LSI_CTL_PGM_M | CA91CX42_LSI_CTL_SUPER_M);
+ if (cycle & VME_SUPER)
+ temp_ctl |= CA91CX42_LSI_CTL_SUPER_SUPR;
+ if (cycle & VME_PROG)
+ temp_ctl |= CA91CX42_LSI_CTL_PGM_PGM;
+
+ /* Setup mapping */
+ iowrite32(pci_base, bridge->base + CA91CX42_LSI_BS[i]);
+ iowrite32(pci_bound, bridge->base + CA91CX42_LSI_BD[i]);
+ iowrite32(vme_offset, bridge->base + CA91CX42_LSI_TO[i]);
+
+ /* Write ctl reg without enable */
+ iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
+
+ if (enabled)
+ temp_ctl |= CA91CX42_LSI_CTL_EN;
+
+ iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
+
+ spin_unlock(&image->lock);
+ return 0;
+
+err_aspace:
+err_dwidth:
+ ca91cx42_free_resource(image);
+err_res:
+err_window:
+ return retval;
+}
+
+static int __ca91cx42_master_get(struct vme_master_resource *image,
+ int *enabled, unsigned long long *vme_base, unsigned long long *size,
+ u32 *aspace, u32 *cycle, u32 *dwidth)
+{
+ unsigned int i, ctl;
+ unsigned long long pci_base, pci_bound, vme_offset;
+ struct ca91cx42_driver *bridge;
+
+ bridge = image->parent->driver_priv;
+
+ i = image->number;
+
+ ctl = ioread32(bridge->base + CA91CX42_LSI_CTL[i]);
+
+ pci_base = ioread32(bridge->base + CA91CX42_LSI_BS[i]);
+ vme_offset = ioread32(bridge->base + CA91CX42_LSI_TO[i]);
+ pci_bound = ioread32(bridge->base + CA91CX42_LSI_BD[i]);
+
+ *vme_base = pci_base + vme_offset;
+ *size = (unsigned long long)(pci_bound - pci_base);
+
+ *enabled = 0;
+ *aspace = 0;
+ *cycle = 0;
+ *dwidth = 0;
+
+ if (ctl & CA91CX42_LSI_CTL_EN)
+ *enabled = 1;
+
+ /* Setup address space */
+ switch (ctl & CA91CX42_LSI_CTL_VAS_M) {
+ case CA91CX42_LSI_CTL_VAS_A16:
+ *aspace = VME_A16;
+ break;
+ case CA91CX42_LSI_CTL_VAS_A24:
+ *aspace = VME_A24;
+ break;
+ case CA91CX42_LSI_CTL_VAS_A32:
+ *aspace = VME_A32;
+ break;
+ case CA91CX42_LSI_CTL_VAS_CRCSR:
+ *aspace = VME_CRCSR;
+ break;
+ case CA91CX42_LSI_CTL_VAS_USER1:
+ *aspace = VME_USER1;
+ break;
+ case CA91CX42_LSI_CTL_VAS_USER2:
+ *aspace = VME_USER2;
+ break;
+ }
+
+ /* XXX Not sure howto check for MBLT */
+ /* Setup cycle types */
+ if (ctl & CA91CX42_LSI_CTL_VCT_BLT)
+ *cycle |= VME_BLT;
+ else
+ *cycle |= VME_SCT;
+
+ if (ctl & CA91CX42_LSI_CTL_SUPER_SUPR)
+ *cycle |= VME_SUPER;
+ else
+ *cycle |= VME_USER;
+
+ if (ctl & CA91CX42_LSI_CTL_PGM_PGM)
+ *cycle = VME_PROG;
+ else
+ *cycle = VME_DATA;
+
+ /* Setup data width */
+ switch (ctl & CA91CX42_LSI_CTL_VDW_M) {
+ case CA91CX42_LSI_CTL_VDW_D8:
+ *dwidth = VME_D8;
+ break;
+ case CA91CX42_LSI_CTL_VDW_D16:
+ *dwidth = VME_D16;
+ break;
+ case CA91CX42_LSI_CTL_VDW_D32:
+ *dwidth = VME_D32;
+ break;
+ case CA91CX42_LSI_CTL_VDW_D64:
+ *dwidth = VME_D64;
+ break;
+ }
+
+ return 0;
+}
+
+static int ca91cx42_master_get(struct vme_master_resource *image, int *enabled,
+ unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
+ u32 *cycle, u32 *dwidth)
+{
+ int retval;
+
+ spin_lock(&image->lock);
+
+ retval = __ca91cx42_master_get(image, enabled, vme_base, size, aspace,
+ cycle, dwidth);
+
+ spin_unlock(&image->lock);
+
+ return retval;
+}
+
+static ssize_t ca91cx42_master_read(struct vme_master_resource *image,
+ void *buf, size_t count, loff_t offset)
+{
+ ssize_t retval;
+ void __iomem *addr = image->kern_base + offset;
+ unsigned int done = 0;
+ unsigned int count32;
+
+ if (count == 0)
+ return 0;
+
+ spin_lock(&image->lock);
+
+ /* The following code handles VME address alignment. We cannot use
+ * memcpy_xxx here because it may cut data transfers in to 8-bit
+ * cycles when D16 or D32 cycles are required on the VME bus.
+ * On the other hand, the bridge itself assures that the maximum data
+ * cycle configured for the transfer is used and splits it
+ * automatically for non-aligned addresses, so we don't want the
+ * overhead of needlessly forcing small transfers for the entire cycle.
+ */
+ if ((uintptr_t)addr & 0x1) {
+ *(u8 *)buf = ioread8(addr);
+ done += 1;
+ if (done == count)
+ goto out;
+ }
+ if ((uintptr_t)(addr + done) & 0x2) {
+ if ((count - done) < 2) {
+ *(u8 *)(buf + done) = ioread8(addr + done);
+ done += 1;
+ goto out;
+ } else {
+ *(u16 *)(buf + done) = ioread16(addr + done);
+ done += 2;
+ }
+ }
+
+ count32 = (count - done) & ~0x3;
+ while (done < count32) {
+ *(u32 *)(buf + done) = ioread32(addr + done);
+ done += 4;
+ }
+
+ if ((count - done) & 0x2) {
+ *(u16 *)(buf + done) = ioread16(addr + done);
+ done += 2;
+ }
+ if ((count - done) & 0x1) {
+ *(u8 *)(buf + done) = ioread8(addr + done);
+ done += 1;
+ }
+out:
+ retval = count;
+ spin_unlock(&image->lock);
+
+ return retval;
+}
+
+static ssize_t ca91cx42_master_write(struct vme_master_resource *image,
+ void *buf, size_t count, loff_t offset)
+{
+ ssize_t retval;
+ void __iomem *addr = image->kern_base + offset;
+ unsigned int done = 0;
+ unsigned int count32;
+
+ if (count == 0)
+ return 0;
+
+ spin_lock(&image->lock);
+
+ /* Here we apply for the same strategy we do in master_read
+ * function in order to assure the correct cycles.
+ */
+ if ((uintptr_t)addr & 0x1) {
+ iowrite8(*(u8 *)buf, addr);
+ done += 1;
+ if (done == count)
+ goto out;
+ }
+ if ((uintptr_t)(addr + done) & 0x2) {
+ if ((count - done) < 2) {
+ iowrite8(*(u8 *)(buf + done), addr + done);
+ done += 1;
+ goto out;
+ } else {
+ iowrite16(*(u16 *)(buf + done), addr + done);
+ done += 2;
+ }
+ }
+
+ count32 = (count - done) & ~0x3;
+ while (done < count32) {
+ iowrite32(*(u32 *)(buf + done), addr + done);
+ done += 4;
+ }
+
+ if ((count - done) & 0x2) {
+ iowrite16(*(u16 *)(buf + done), addr + done);
+ done += 2;
+ }
+ if ((count - done) & 0x1) {
+ iowrite8(*(u8 *)(buf + done), addr + done);
+ done += 1;
+ }
+out:
+ retval = count;
+
+ spin_unlock(&image->lock);
+
+ return retval;
+}
+
+static unsigned int ca91cx42_master_rmw(struct vme_master_resource *image,
+ unsigned int mask, unsigned int compare, unsigned int swap,
+ loff_t offset)
+{
+ u32 result;
+ uintptr_t pci_addr;
+ int i;
+ struct ca91cx42_driver *bridge;
+ struct device *dev;
+
+ bridge = image->parent->driver_priv;
+ dev = image->parent->parent;
+
+ /* Find the PCI address that maps to the desired VME address */
+ i = image->number;
+
+ /* Locking as we can only do one of these at a time */
+ mutex_lock(&bridge->vme_rmw);
+
+ /* Lock image */
+ spin_lock(&image->lock);
+
+ pci_addr = (uintptr_t)image->kern_base + offset;
+
+ /* Address must be 4-byte aligned */
+ if (pci_addr & 0x3) {
+ dev_err(dev, "RMW Address not 4-byte aligned\n");
+ result = -EINVAL;
+ goto out;
+ }
+
+ /* Ensure RMW Disabled whilst configuring */
+ iowrite32(0, bridge->base + SCYC_CTL);
+
+ /* Configure registers */
+ iowrite32(mask, bridge->base + SCYC_EN);
+ iowrite32(compare, bridge->base + SCYC_CMP);
+ iowrite32(swap, bridge->base + SCYC_SWP);
+ iowrite32(pci_addr, bridge->base + SCYC_ADDR);
+
+ /* Enable RMW */
+ iowrite32(CA91CX42_SCYC_CTL_CYC_RMW, bridge->base + SCYC_CTL);
+
+ /* Kick process off with a read to the required address. */
+ result = ioread32(image->kern_base + offset);
+
+ /* Disable RMW */
+ iowrite32(0, bridge->base + SCYC_CTL);
+
+out:
+ spin_unlock(&image->lock);
+
+ mutex_unlock(&bridge->vme_rmw);
+
+ return result;
+}
+
+static 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;
+ struct device *dev;
+
+ dev = list->parent->parent->parent;
+
+ /* XXX descriptor must be aligned on 64-bit boundaries */
+ entry = kmalloc(sizeof(struct ca91cx42_dma_entry), GFP_KERNEL);
+ if (entry == NULL) {
+ dev_err(dev, "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) {
+ dev_err(dev, "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 = dest->private;
+ pci_attr = src->private;
+ } else {
+ vme_attr = src->private;
+ pci_attr = dest->private;
+ }
+
+ /* Check we can do fulfill required attributes */
+ if ((vme_attr->aspace & ~(VME_A16 | VME_A24 | VME_A32 | VME_USER1 |
+ VME_USER2)) != 0) {
+
+ dev_err(dev, "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) {
+
+ dev_err(dev, "Unsupported cycle type\n");
+ retval = -EINVAL;
+ goto err_cycle;
+ }
+
+ /* Check to see if we can fulfill source and destination */
+ if (!(((src->type == VME_DMA_PCI) && (dest->type == VME_DMA_VME)) ||
+ ((src->type == VME_DMA_VME) && (dest->type == VME_DMA_PCI)))) {
+
+ dev_err(dev, "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:
+ dev_err(dev, "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:
+ dev_err(dev, "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;
+}
+
+static 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 device *dev;
+ struct ca91cx42_driver *bridge;
+
+ ctrlr = list->parent;
+
+ bridge = ctrlr->parent->driver_priv;
+ dev = ctrlr->parent->parent;
+
+ 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)) {
+
+ dev_err(dev, "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;
+
+}
+
+static 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.
+ *
+ * This does not enable the LM monitor - that should be done when the first
+ * callback is attached and disabled when the last callback is removed.
+ */
+static int ca91cx42_lm_set(struct vme_lm_resource *lm,
+ unsigned long long lm_base, u32 aspace, u32 cycle)
+{
+ u32 temp_base, lm_ctl = 0;
+ int i;
+ struct ca91cx42_driver *bridge;
+ struct device *dev;
+
+ bridge = lm->parent->driver_priv;
+ dev = lm->parent->parent;
+
+ /* Check the alignment of the location monitor */
+ temp_base = (u32)lm_base;
+ if (temp_base & 0xffff) {
+ dev_err(dev, "Location monitor must be aligned to 64KB "
+ "boundary");
+ return -EINVAL;
+ }
+
+ mutex_lock(&lm->mtx);
+
+ /* If we already have a callback attached, we can't move it! */
+ for (i = 0; i < lm->monitors; i++) {
+ if (bridge->lm_callback[i] != NULL) {
+ mutex_unlock(&lm->mtx);
+ dev_err(dev, "Location monitor callback attached, "
+ "can't reset\n");
+ return -EBUSY;
+ }
+ }
+
+ switch (aspace) {
+ case VME_A16:
+ lm_ctl |= CA91CX42_LM_CTL_AS_A16;
+ break;
+ case VME_A24:
+ lm_ctl |= CA91CX42_LM_CTL_AS_A24;
+ break;
+ case VME_A32:
+ lm_ctl |= CA91CX42_LM_CTL_AS_A32;
+ break;
+ default:
+ mutex_unlock(&lm->mtx);
+ dev_err(dev, "Invalid address space\n");
+ return -EINVAL;
+ break;
+ }
+
+ if (cycle & VME_SUPER)
+ lm_ctl |= CA91CX42_LM_CTL_SUPR;
+ if (cycle & VME_USER)
+ lm_ctl |= CA91CX42_LM_CTL_NPRIV;
+ if (cycle & VME_PROG)
+ lm_ctl |= CA91CX42_LM_CTL_PGM;
+ if (cycle & VME_DATA)
+ lm_ctl |= CA91CX42_LM_CTL_DATA;
+
+ iowrite32(lm_base, bridge->base + LM_BS);
+ iowrite32(lm_ctl, bridge->base + LM_CTL);
+
+ mutex_unlock(&lm->mtx);
+
+ return 0;
+}
+
+/* Get configuration of the callback monitor and return whether it is enabled
+ * or disabled.
+ */
+static int ca91cx42_lm_get(struct vme_lm_resource *lm,
+ unsigned long long *lm_base, u32 *aspace, u32 *cycle)
+{
+ u32 lm_ctl, enabled = 0;
+ struct ca91cx42_driver *bridge;
+
+ bridge = lm->parent->driver_priv;
+
+ mutex_lock(&lm->mtx);
+
+ *lm_base = (unsigned long long)ioread32(bridge->base + LM_BS);
+ lm_ctl = ioread32(bridge->base + LM_CTL);
+
+ if (lm_ctl & CA91CX42_LM_CTL_EN)
+ enabled = 1;
+
+ if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A16)
+ *aspace = VME_A16;
+ if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A24)
+ *aspace = VME_A24;
+ if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A32)
+ *aspace = VME_A32;
+
+ *cycle = 0;
+ if (lm_ctl & CA91CX42_LM_CTL_SUPR)
+ *cycle |= VME_SUPER;
+ if (lm_ctl & CA91CX42_LM_CTL_NPRIV)
+ *cycle |= VME_USER;
+ if (lm_ctl & CA91CX42_LM_CTL_PGM)
+ *cycle |= VME_PROG;
+ if (lm_ctl & CA91CX42_LM_CTL_DATA)
+ *cycle |= VME_DATA;
+
+ mutex_unlock(&lm->mtx);
+
+ return enabled;
+}
+
+/*
+ * Attach a callback to a specific location monitor.
+ *
+ * Callback will be passed the monitor triggered.
+ */
+static int ca91cx42_lm_attach(struct vme_lm_resource *lm, int monitor,
+ void (*callback)(int))
+{
+ u32 lm_ctl, tmp;
+ struct ca91cx42_driver *bridge;
+ struct device *dev;
+
+ bridge = lm->parent->driver_priv;
+ dev = lm->parent->parent;
+
+ mutex_lock(&lm->mtx);
+
+ /* Ensure that the location monitor is configured - need PGM or DATA */
+ lm_ctl = ioread32(bridge->base + LM_CTL);
+ if ((lm_ctl & (CA91CX42_LM_CTL_PGM | CA91CX42_LM_CTL_DATA)) == 0) {
+ mutex_unlock(&lm->mtx);
+ dev_err(dev, "Location monitor not properly configured\n");
+ return -EINVAL;
+ }
+
+ /* Check that a callback isn't already attached */
+ if (bridge->lm_callback[monitor] != NULL) {
+ mutex_unlock(&lm->mtx);
+ dev_err(dev, "Existing callback attached\n");
+ return -EBUSY;
+ }
+
+ /* Attach callback */
+ bridge->lm_callback[monitor] = callback;
+
+ /* Enable Location Monitor interrupt */
+ tmp = ioread32(bridge->base + LINT_EN);
+ tmp |= CA91CX42_LINT_LM[monitor];
+ iowrite32(tmp, bridge->base + LINT_EN);
+
+ /* Ensure that global Location Monitor Enable set */
+ if ((lm_ctl & CA91CX42_LM_CTL_EN) == 0) {
+ lm_ctl |= CA91CX42_LM_CTL_EN;
+ iowrite32(lm_ctl, bridge->base + LM_CTL);
+ }
+
+ mutex_unlock(&lm->mtx);
+
+ return 0;
+}
+
+/*
+ * Detach a callback function forn a specific location monitor.
+ */
+static int ca91cx42_lm_detach(struct vme_lm_resource *lm, int monitor)
+{
+ u32 tmp;
+ struct ca91cx42_driver *bridge;
+
+ bridge = lm->parent->driver_priv;
+
+ mutex_lock(&lm->mtx);
+
+ /* Disable Location Monitor and ensure previous interrupts are clear */
+ tmp = ioread32(bridge->base + LINT_EN);
+ tmp &= ~CA91CX42_LINT_LM[monitor];
+ iowrite32(tmp, bridge->base + LINT_EN);
+
+ iowrite32(CA91CX42_LINT_LM[monitor],
+ bridge->base + LINT_STAT);
+
+ /* Detach callback */
+ bridge->lm_callback[monitor] = NULL;
+
+ /* If all location monitors disabled, disable global Location Monitor */
+ if ((tmp & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
+ CA91CX42_LINT_LM3)) == 0) {
+ tmp = ioread32(bridge->base + LM_CTL);
+ tmp &= ~CA91CX42_LM_CTL_EN;
+ iowrite32(tmp, bridge->base + LM_CTL);
+ }
+
+ mutex_unlock(&lm->mtx);
+
+ return 0;
+}
+
+static int ca91cx42_slot_get(struct vme_bridge *ca91cx42_bridge)
+{
+ u32 slot = 0;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ if (!geoid) {
+ slot = ioread32(bridge->base + VCSR_BS);
+ slot = ((slot & CA91CX42_VCSR_BS_SLOT_M) >> 27);
+ } else
+ slot = geoid;
+
+ return (int)slot;
+
+}
+
+static void *ca91cx42_alloc_consistent(struct device *parent, size_t size,
+ dma_addr_t *dma)
+{
+ struct pci_dev *pdev;
+
+ /* Find pci_dev container of dev */
+ pdev = container_of(parent, struct pci_dev, dev);
+
+ return pci_alloc_consistent(pdev, size, dma);
+}
+
+static void ca91cx42_free_consistent(struct device *parent, size_t size,
+ void *vaddr, dma_addr_t dma)
+{
+ struct pci_dev *pdev;
+
+ /* Find pci_dev container of dev */
+ pdev = container_of(parent, struct pci_dev, dev);
+
+ pci_free_consistent(pdev, size, vaddr, dma);
+}
+
+/*
+ * Configure CR/CSR space
+ *
+ * Access to the CR/CSR can be configured at power-up. The location of the
+ * CR/CSR registers in the CR/CSR address space is determined by the boards
+ * Auto-ID or Geographic address. This function ensures that the window is
+ * enabled at an offset consistent with the boards geopgraphic address.
+ */
+static int ca91cx42_crcsr_init(struct vme_bridge *ca91cx42_bridge,
+ struct pci_dev *pdev)
+{
+ unsigned int crcsr_addr;
+ int tmp, slot;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ slot = ca91cx42_slot_get(ca91cx42_bridge);
+
+ /* Write CSR Base Address if slot ID is supplied as a module param */
+ if (geoid)
+ iowrite32(geoid << 27, bridge->base + VCSR_BS);
+
+ dev_info(&pdev->dev, "CR/CSR Offset: %d\n", slot);
+ if (slot == 0) {
+ dev_err(&pdev->dev, "Slot number is unset, not configuring "
+ "CR/CSR space\n");
+ return -EINVAL;
+ }
+
+ /* Allocate mem for CR/CSR image */
+ bridge->crcsr_kernel = pci_zalloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
+ &bridge->crcsr_bus);
+ if (bridge->crcsr_kernel == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for CR/CSR "
+ "image\n");
+ return -ENOMEM;
+ }
+
+ crcsr_addr = slot * (512 * 1024);
+ iowrite32(bridge->crcsr_bus - crcsr_addr, bridge->base + VCSR_TO);
+
+ tmp = ioread32(bridge->base + VCSR_CTL);
+ tmp |= CA91CX42_VCSR_CTL_EN;
+ iowrite32(tmp, bridge->base + VCSR_CTL);
+
+ return 0;
+}
+
+static void ca91cx42_crcsr_exit(struct vme_bridge *ca91cx42_bridge,
+ struct pci_dev *pdev)
+{
+ u32 tmp;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ /* Turn off CR/CSR space */
+ tmp = ioread32(bridge->base + VCSR_CTL);
+ tmp &= ~CA91CX42_VCSR_CTL_EN;
+ iowrite32(tmp, bridge->base + VCSR_CTL);
+
+ /* Free image */
+ iowrite32(0, bridge->base + VCSR_TO);
+
+ pci_free_consistent(pdev, VME_CRCSR_BUF_SIZE, bridge->crcsr_kernel,
+ bridge->crcsr_bus);
+}
+
+static int ca91cx42_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int retval, i;
+ u32 data;
+ struct list_head *pos = NULL, *n;
+ struct vme_bridge *ca91cx42_bridge;
+ struct ca91cx42_driver *ca91cx42_device;
+ struct vme_master_resource *master_image;
+ struct vme_slave_resource *slave_image;
+ struct vme_dma_resource *dma_ctrlr;
+ struct vme_lm_resource *lm;
+
+ /* We want to support more than one of each bridge so we need to
+ * dynamically allocate the bridge structure
+ */
+ ca91cx42_bridge = kzalloc(sizeof(struct vme_bridge), GFP_KERNEL);
+
+ if (ca91cx42_bridge == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for device "
+ "structure\n");
+ retval = -ENOMEM;
+ goto err_struct;
+ }
+
+ ca91cx42_device = kzalloc(sizeof(struct ca91cx42_driver), GFP_KERNEL);
+
+ if (ca91cx42_device == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for device "
+ "structure\n");
+ retval = -ENOMEM;
+ goto err_driver;
+ }
+
+ ca91cx42_bridge->driver_priv = ca91cx42_device;
+
+ /* Enable the device */
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "Unable to enable device\n");
+ goto err_enable;
+ }
+
+ /* Map Registers */
+ retval = pci_request_regions(pdev, driver_name);
+ if (retval) {
+ dev_err(&pdev->dev, "Unable to reserve resources\n");
+ goto err_resource;
+ }
+
+ /* map registers in BAR 0 */
+ ca91cx42_device->base = ioremap_nocache(pci_resource_start(pdev, 0),
+ 4096);
+ if (!ca91cx42_device->base) {
+ dev_err(&pdev->dev, "Unable to remap CRG region\n");
+ retval = -EIO;
+ goto err_remap;
+ }
+
+ /* Check to see if the mapping worked out */
+ data = ioread32(ca91cx42_device->base + CA91CX42_PCI_ID) & 0x0000FFFF;
+ if (data != PCI_VENDOR_ID_TUNDRA) {
+ dev_err(&pdev->dev, "PCI_ID check failed\n");
+ retval = -EIO;
+ goto err_test;
+ }
+
+ /* Initialize wait queues & mutual exclusion flags */
+ init_waitqueue_head(&ca91cx42_device->dma_queue);
+ init_waitqueue_head(&ca91cx42_device->iack_queue);
+ mutex_init(&ca91cx42_device->vme_int);
+ mutex_init(&ca91cx42_device->vme_rmw);
+
+ ca91cx42_bridge->parent = &pdev->dev;
+ strcpy(ca91cx42_bridge->name, driver_name);
+
+ /* Setup IRQ */
+ retval = ca91cx42_irq_init(ca91cx42_bridge);
+ if (retval != 0) {
+ dev_err(&pdev->dev, "Chip Initialization failed.\n");
+ goto err_irq;
+ }
+
+ /* Add master windows to list */
+ INIT_LIST_HEAD(&ca91cx42_bridge->master_resources);
+ for (i = 0; i < CA91C142_MAX_MASTER; i++) {
+ master_image = kmalloc(sizeof(struct vme_master_resource),
+ GFP_KERNEL);
+ if (master_image == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for "
+ "master resource structure\n");
+ retval = -ENOMEM;
+ goto err_master;
+ }
+ master_image->parent = ca91cx42_bridge;
+ spin_lock_init(&master_image->lock);
+ master_image->locked = 0;
+ master_image->number = i;
+ master_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
+ VME_CRCSR | VME_USER1 | VME_USER2;
+ master_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
+ VME_SUPER | VME_USER | VME_PROG | VME_DATA;
+ master_image->width_attr = VME_D8 | VME_D16 | VME_D32 | VME_D64;
+ memset(&master_image->bus_resource, 0,
+ sizeof(struct resource));
+ master_image->kern_base = NULL;
+ list_add_tail(&master_image->list,
+ &ca91cx42_bridge->master_resources);
+ }
+
+ /* Add slave windows to list */
+ INIT_LIST_HEAD(&ca91cx42_bridge->slave_resources);
+ for (i = 0; i < CA91C142_MAX_SLAVE; i++) {
+ slave_image = kmalloc(sizeof(struct vme_slave_resource),
+ GFP_KERNEL);
+ if (slave_image == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for "
+ "slave resource structure\n");
+ retval = -ENOMEM;
+ goto err_slave;
+ }
+ slave_image->parent = ca91cx42_bridge;
+ mutex_init(&slave_image->mtx);
+ slave_image->locked = 0;
+ slave_image->number = i;
+ slave_image->address_attr = VME_A24 | VME_A32 | VME_USER1 |
+ VME_USER2;
+
+ /* Only windows 0 and 4 support A16 */
+ if (i == 0 || i == 4)
+ slave_image->address_attr |= VME_A16;
+
+ slave_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
+ VME_SUPER | VME_USER | VME_PROG | VME_DATA;
+ list_add_tail(&slave_image->list,
+ &ca91cx42_bridge->slave_resources);
+ }
+
+ /* Add dma engines to list */
+ INIT_LIST_HEAD(&ca91cx42_bridge->dma_resources);
+ for (i = 0; i < CA91C142_MAX_DMA; i++) {
+ dma_ctrlr = kmalloc(sizeof(struct vme_dma_resource),
+ GFP_KERNEL);
+ if (dma_ctrlr == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for "
+ "dma resource structure\n");
+ retval = -ENOMEM;
+ goto err_dma;
+ }
+ dma_ctrlr->parent = ca91cx42_bridge;
+ mutex_init(&dma_ctrlr->mtx);
+ dma_ctrlr->locked = 0;
+ dma_ctrlr->number = i;
+ dma_ctrlr->route_attr = VME_DMA_VME_TO_MEM |
+ VME_DMA_MEM_TO_VME;
+ INIT_LIST_HEAD(&dma_ctrlr->pending);
+ INIT_LIST_HEAD(&dma_ctrlr->running);
+ list_add_tail(&dma_ctrlr->list,
+ &ca91cx42_bridge->dma_resources);
+ }
+
+ /* Add location monitor to list */
+ INIT_LIST_HEAD(&ca91cx42_bridge->lm_resources);
+ lm = kmalloc(sizeof(struct vme_lm_resource), GFP_KERNEL);
+ if (lm == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate memory for "
+ "location monitor resource structure\n");
+ retval = -ENOMEM;
+ goto err_lm;
+ }
+ lm->parent = ca91cx42_bridge;
+ mutex_init(&lm->mtx);
+ lm->locked = 0;
+ lm->number = 1;
+ lm->monitors = 4;
+ list_add_tail(&lm->list, &ca91cx42_bridge->lm_resources);
+
+ ca91cx42_bridge->slave_get = ca91cx42_slave_get;
+ ca91cx42_bridge->slave_set = ca91cx42_slave_set;
+ ca91cx42_bridge->master_get = ca91cx42_master_get;
+ ca91cx42_bridge->master_set = ca91cx42_master_set;
+ ca91cx42_bridge->master_read = ca91cx42_master_read;
+ ca91cx42_bridge->master_write = ca91cx42_master_write;
+ ca91cx42_bridge->master_rmw = ca91cx42_master_rmw;
+ 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;
+ ca91cx42_bridge->irq_set = ca91cx42_irq_set;
+ ca91cx42_bridge->irq_generate = ca91cx42_irq_generate;
+ ca91cx42_bridge->lm_set = ca91cx42_lm_set;
+ ca91cx42_bridge->lm_get = ca91cx42_lm_get;
+ ca91cx42_bridge->lm_attach = ca91cx42_lm_attach;
+ ca91cx42_bridge->lm_detach = ca91cx42_lm_detach;
+ ca91cx42_bridge->slot_get = ca91cx42_slot_get;
+ ca91cx42_bridge->alloc_consistent = ca91cx42_alloc_consistent;
+ ca91cx42_bridge->free_consistent = ca91cx42_free_consistent;
+
+ data = ioread32(ca91cx42_device->base + MISC_CTL);
+ dev_info(&pdev->dev, "Board is%s the VME system controller\n",
+ (data & CA91CX42_MISC_CTL_SYSCON) ? "" : " not");
+ dev_info(&pdev->dev, "Slot ID is %d\n",
+ ca91cx42_slot_get(ca91cx42_bridge));
+
+ if (ca91cx42_crcsr_init(ca91cx42_bridge, pdev))
+ dev_err(&pdev->dev, "CR/CSR configuration failed.\n");
+
+ /* Need to save ca91cx42_bridge pointer locally in link list for use in
+ * ca91cx42_remove()
+ */
+ retval = vme_register_bridge(ca91cx42_bridge);
+ if (retval != 0) {
+ dev_err(&pdev->dev, "Chip Registration failed.\n");
+ goto err_reg;
+ }
+
+ pci_set_drvdata(pdev, ca91cx42_bridge);
+
+ return 0;
+
+err_reg:
+ ca91cx42_crcsr_exit(ca91cx42_bridge, pdev);
+err_lm:
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->lm_resources) {
+ lm = list_entry(pos, struct vme_lm_resource, list);
+ list_del(pos);
+ kfree(lm);
+ }
+err_dma:
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->dma_resources) {
+ dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
+ list_del(pos);
+ kfree(dma_ctrlr);
+ }
+err_slave:
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->slave_resources) {
+ slave_image = list_entry(pos, struct vme_slave_resource, list);
+ list_del(pos);
+ kfree(slave_image);
+ }
+err_master:
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->master_resources) {
+ master_image = list_entry(pos, struct vme_master_resource,
+ list);
+ list_del(pos);
+ kfree(master_image);
+ }
+
+ ca91cx42_irq_exit(ca91cx42_device, pdev);
+err_irq:
+err_test:
+ iounmap(ca91cx42_device->base);
+err_remap:
+ pci_release_regions(pdev);
+err_resource:
+ pci_disable_device(pdev);
+err_enable:
+ kfree(ca91cx42_device);
+err_driver:
+ kfree(ca91cx42_bridge);
+err_struct:
+ return retval;
+
+}
+
+static void ca91cx42_remove(struct pci_dev *pdev)
+{
+ struct list_head *pos = NULL, *n;
+ struct vme_master_resource *master_image;
+ struct vme_slave_resource *slave_image;
+ struct vme_dma_resource *dma_ctrlr;
+ struct vme_lm_resource *lm;
+ struct ca91cx42_driver *bridge;
+ struct vme_bridge *ca91cx42_bridge = pci_get_drvdata(pdev);
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+
+ /* Turn off Ints */
+ iowrite32(0, bridge->base + LINT_EN);
+
+ /* Turn off the windows */
+ iowrite32(0x00800000, bridge->base + LSI0_CTL);
+ iowrite32(0x00800000, bridge->base + LSI1_CTL);
+ iowrite32(0x00800000, bridge->base + LSI2_CTL);
+ iowrite32(0x00800000, bridge->base + LSI3_CTL);
+ iowrite32(0x00800000, bridge->base + LSI4_CTL);
+ iowrite32(0x00800000, bridge->base + LSI5_CTL);
+ iowrite32(0x00800000, bridge->base + LSI6_CTL);
+ iowrite32(0x00800000, bridge->base + LSI7_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI0_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI1_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI2_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI3_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI4_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI5_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI6_CTL);
+ iowrite32(0x00F00000, bridge->base + VSI7_CTL);
+
+ vme_unregister_bridge(ca91cx42_bridge);
+
+ ca91cx42_crcsr_exit(ca91cx42_bridge, pdev);
+
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->lm_resources) {
+ lm = list_entry(pos, struct vme_lm_resource, list);
+ list_del(pos);
+ kfree(lm);
+ }
+
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->dma_resources) {
+ dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
+ list_del(pos);
+ kfree(dma_ctrlr);
+ }
+
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->slave_resources) {
+ slave_image = list_entry(pos, struct vme_slave_resource, list);
+ list_del(pos);
+ kfree(slave_image);
+ }
+
+ /* resources are stored in link list */
+ list_for_each_safe(pos, n, &ca91cx42_bridge->master_resources) {
+ master_image = list_entry(pos, struct vme_master_resource,
+ list);
+ list_del(pos);
+ kfree(master_image);
+ }
+
+ ca91cx42_irq_exit(bridge, pdev);
+
+ iounmap(bridge->base);
+
+ pci_release_regions(pdev);
+
+ pci_disable_device(pdev);
+
+ kfree(ca91cx42_bridge);
+}
+
+module_pci_driver(ca91cx42_driver);
+
+MODULE_PARM_DESC(geoid, "Override geographical addressing");
+module_param(geoid, int, 0);
+
+MODULE_DESCRIPTION("VME driver for the Tundra Universe II VME bridge");
+MODULE_LICENSE("GPL");