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Diffstat (limited to 'arch/cris/arch-v32/drivers/pci')
-rw-r--r--arch/cris/arch-v32/drivers/pci/Makefile5
-rw-r--r--arch/cris/arch-v32/drivers/pci/bios.c131
-rw-r--r--arch/cris/arch-v32/drivers/pci/dma.c149
3 files changed, 285 insertions, 0 deletions
diff --git a/arch/cris/arch-v32/drivers/pci/Makefile b/arch/cris/arch-v32/drivers/pci/Makefile
new file mode 100644
index 00000000000..bff7482f244
--- /dev/null
+++ b/arch/cris/arch-v32/drivers/pci/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for Etrax cardbus driver
+#
+
+obj-$(CONFIG_ETRAX_CARDBUS) += bios.o dma.o
diff --git a/arch/cris/arch-v32/drivers/pci/bios.c b/arch/cris/arch-v32/drivers/pci/bios.c
new file mode 100644
index 00000000000..24bc149889b
--- /dev/null
+++ b/arch/cris/arch-v32/drivers/pci/bios.c
@@ -0,0 +1,131 @@
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <asm/arch/hwregs/intr_vect.h>
+
+void __devinit pcibios_fixup_bus(struct pci_bus *b)
+{
+}
+
+char * __devinit pcibios_setup(char *str)
+{
+ return NULL;
+}
+
+void pcibios_set_master(struct pci_dev *dev)
+{
+ u8 lat;
+ pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
+ printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
+ pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
+}
+
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine)
+{
+ unsigned long prot;
+
+ /* Leave vm_pgoff as-is, the PCI space address is the physical
+ * address on this platform.
+ */
+ vma->vm_flags |= (VM_SHM | VM_LOCKED | VM_IO);
+
+ prot = pgprot_val(vma->vm_page_prot);
+ vma->vm_page_prot = __pgprot(prot);
+
+ /* Write-combine setting is ignored, it is changed via the mtrr
+ * interfaces on this platform.
+ */
+ if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot))
+ return -EAGAIN;
+
+ return 0;
+}
+
+void
+pcibios_align_resource(void *data, struct resource *res,
+ unsigned long size, unsigned long align)
+{
+ if (res->flags & IORESOURCE_IO) {
+ unsigned long start = res->start;
+
+ if (start & 0x300) {
+ start = (start + 0x3ff) & ~0x3ff;
+ res->start = start;
+ }
+ }
+}
+
+int pcibios_enable_resources(struct pci_dev *dev, int mask)
+{
+ u16 cmd, old_cmd;
+ int idx;
+ struct resource *r;
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ old_cmd = cmd;
+ for(idx=0; idx<6; idx++) {
+ /* Only set up the requested stuff */
+ if (!(mask & (1<<idx)))
+ continue;
+
+ r = &dev->resource[idx];
+ if (!r->start && r->end) {
+ printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
+ return -EINVAL;
+ }
+ if (r->flags & IORESOURCE_IO)
+ cmd |= PCI_COMMAND_IO;
+ if (r->flags & IORESOURCE_MEM)
+ cmd |= PCI_COMMAND_MEMORY;
+ }
+ if (dev->resource[PCI_ROM_RESOURCE].start)
+ cmd |= PCI_COMMAND_MEMORY;
+ if (cmd != old_cmd) {
+ printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
+ pci_write_config_word(dev, PCI_COMMAND, cmd);
+ }
+ return 0;
+}
+
+int pcibios_enable_irq(struct pci_dev *dev)
+{
+ dev->irq = EXT_INTR_VECT;
+ return 0;
+}
+
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+ int err;
+
+ if ((err = pcibios_enable_resources(dev, mask)) < 0)
+ return err;
+
+ return pcibios_enable_irq(dev);
+}
+
+int pcibios_assign_resources(void)
+{
+ struct pci_dev *dev = NULL;
+ int idx;
+ struct resource *r;
+
+ while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ int class = dev->class >> 8;
+
+ /* Don't touch classless devices and host bridges */
+ if (!class || class == PCI_CLASS_BRIDGE_HOST)
+ continue;
+
+ for(idx=0; idx<6; idx++) {
+ r = &dev->resource[idx];
+
+ if (!r->start && r->end)
+ pci_assign_resource(dev, idx);
+ }
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL(pcibios_assign_resources);
diff --git a/arch/cris/arch-v32/drivers/pci/dma.c b/arch/cris/arch-v32/drivers/pci/dma.c
new file mode 100644
index 00000000000..10329306d23
--- /dev/null
+++ b/arch/cris/arch-v32/drivers/pci/dma.c
@@ -0,0 +1,149 @@
+/*
+ * Dynamic DMA mapping support.
+ *
+ * On cris there is no hardware dynamic DMA address translation,
+ * so consistent alloc/free are merely page allocation/freeing.
+ * The rest of the dynamic DMA mapping interface is implemented
+ * in asm/pci.h.
+ *
+ * Borrowed from i386.
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+
+struct dma_coherent_mem {
+ void *virt_base;
+ u32 device_base;
+ int size;
+ int flags;
+ unsigned long *bitmap;
+};
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, unsigned int __nocast gfp)
+{
+ void *ret;
+ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+ int order = get_order(size);
+ /* ignore region specifiers */
+ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+
+ if (mem) {
+ int page = bitmap_find_free_region(mem->bitmap, mem->size,
+ order);
+ if (page >= 0) {
+ *dma_handle = mem->device_base + (page << PAGE_SHIFT);
+ ret = mem->virt_base + (page << PAGE_SHIFT);
+ memset(ret, 0, size);
+ return ret;
+ }
+ if (mem->flags & DMA_MEMORY_EXCLUSIVE)
+ return NULL;
+ }
+
+ if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+ gfp |= GFP_DMA;
+
+ ret = (void *)__get_free_pages(gfp, order);
+
+ if (ret != NULL) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_phys(ret);
+ }
+ return ret;
+}
+
+void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+ int order = get_order(size);
+
+ if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
+ int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
+
+ bitmap_release_region(mem->bitmap, page, order);
+ } else
+ free_pages((unsigned long)vaddr, order);
+}
+
+int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+ dma_addr_t device_addr, size_t size, int flags)
+{
+ void __iomem *mem_base;
+ int pages = size >> PAGE_SHIFT;
+ int bitmap_size = (pages + 31)/32;
+
+ if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0)
+ goto out;
+ if (!size)
+ goto out;
+ if (dev->dma_mem)
+ goto out;
+
+ /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */
+
+ mem_base = ioremap(bus_addr, size);
+ if (!mem_base)
+ goto out;
+
+ dev->dma_mem = kmalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
+ if (!dev->dma_mem)
+ goto out;
+ memset(dev->dma_mem, 0, sizeof(struct dma_coherent_mem));
+ dev->dma_mem->bitmap = kmalloc(bitmap_size, GFP_KERNEL);
+ if (!dev->dma_mem->bitmap)
+ goto free1_out;
+ memset(dev->dma_mem->bitmap, 0, bitmap_size);
+
+ dev->dma_mem->virt_base = mem_base;
+ dev->dma_mem->device_base = device_addr;
+ dev->dma_mem->size = pages;
+ dev->dma_mem->flags = flags;
+
+ if (flags & DMA_MEMORY_MAP)
+ return DMA_MEMORY_MAP;
+
+ return DMA_MEMORY_IO;
+
+ free1_out:
+ kfree(dev->dma_mem->bitmap);
+ out:
+ return 0;
+}
+EXPORT_SYMBOL(dma_declare_coherent_memory);
+
+void dma_release_declared_memory(struct device *dev)
+{
+ struct dma_coherent_mem *mem = dev->dma_mem;
+
+ if(!mem)
+ return;
+ dev->dma_mem = NULL;
+ iounmap(mem->virt_base);
+ kfree(mem->bitmap);
+ kfree(mem);
+}
+EXPORT_SYMBOL(dma_release_declared_memory);
+
+void *dma_mark_declared_memory_occupied(struct device *dev,
+ dma_addr_t device_addr, size_t size)
+{
+ struct dma_coherent_mem *mem = dev->dma_mem;
+ int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ int pos, err;
+
+ if (!mem)
+ return ERR_PTR(-EINVAL);
+
+ pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
+ err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
+ if (err != 0)
+ return ERR_PTR(err);
+ return mem->virt_base + (pos << PAGE_SHIFT);
+}
+EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 13:34:31 +0000