/* sun_esp.c: ESP front-end for Sparc SBUS systems.
*
- * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 2007, 2008 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/module.h>
+#include <linux/mm.h>
#include <linux/init.h>
+#include <linux/dma-mapping.h>
#include <asm/irq.h>
#include <asm/io.h>
#define dma_write32(VAL, REG) \
sbus_writel((VAL), esp->dma_regs + (REG))
-static int __devinit esp_sbus_find_dma(struct esp *esp, struct sbus_dev *dma_sdev)
-{
- struct sbus_dev *sdev = esp->dev;
- struct sbus_dma *dma;
+/* DVMA chip revisions */
+enum dvma_rev {
+ dvmarev0,
+ dvmaesc1,
+ dvmarev1,
+ dvmarev2,
+ dvmarev3,
+ dvmarevplus,
+ dvmahme
+};
- if (dma_sdev != NULL) {
- for_each_dvma(dma) {
- if (dma->sdev == dma_sdev)
- break;
- }
- } else {
- for_each_dvma(dma) {
- if (dma->sdev == NULL)
- break;
+static int __devinit esp_sbus_setup_dma(struct esp *esp,
+ struct of_device *dma_of)
+{
+ esp->dma = dma_of;
- /* If bus + slot are the same and it has the
- * correct OBP name, it's ours.
- */
- if (sdev->bus == dma->sdev->bus &&
- sdev->slot == dma->sdev->slot &&
- (!strcmp(dma->sdev->prom_name, "dma") ||
- !strcmp(dma->sdev->prom_name, "espdma")))
- break;
- }
- }
+ esp->dma_regs = of_ioremap(&dma_of->resource[0], 0,
+ resource_size(&dma_of->resource[0]),
+ "espdma");
+ if (!esp->dma_regs)
+ return -ENOMEM;
- if (dma == NULL) {
- printk(KERN_ERR PFX "[%s] Cannot find dma.\n",
- sdev->ofdev.node->full_name);
- return -ENODEV;
+ switch (dma_read32(DMA_CSR) & DMA_DEVICE_ID) {
+ case DMA_VERS0:
+ esp->dmarev = dvmarev0;
+ break;
+ case DMA_ESCV1:
+ esp->dmarev = dvmaesc1;
+ break;
+ case DMA_VERS1:
+ esp->dmarev = dvmarev1;
+ break;
+ case DMA_VERS2:
+ esp->dmarev = dvmarev2;
+ break;
+ case DMA_VERHME:
+ esp->dmarev = dvmahme;
+ break;
+ case DMA_VERSPLUS:
+ esp->dmarev = dvmarevplus;
+ break;
}
- esp->dma = dma;
- esp->dma_regs = dma->regs;
return 0;
{
struct sbus_dev *sdev = esp->dev;
- esp->command_block = sbus_alloc_consistent(sdev, 16,
- &esp->command_block_dma);
+ esp->command_block = dma_alloc_coherent(&sdev->ofdev.dev, 16,
+ &esp->command_block_dma,
+ GFP_ATOMIC);
if (!esp->command_block)
return -ENOMEM;
return 0;
esp->cfreq = fmhz;
}
-static void __devinit esp_get_bursts(struct esp *esp, struct sbus_dev *dma)
+static void __devinit esp_get_bursts(struct esp *esp, struct of_device *dma_of)
{
+ struct device_node *dma_dp = dma_of->node;
struct sbus_dev *sdev = esp->dev;
- struct device_node *dp = sdev->ofdev.node;
- u8 bursts;
+ struct device_node *dp;
+ u8 bursts, val;
+ dp = sdev->ofdev.node;
bursts = of_getintprop_default(dp, "burst-sizes", 0xff);
- if (dma) {
- struct device_node *dma_dp = dma->ofdev.node;
- u8 val = of_getintprop_default(dma_dp, "burst-sizes", 0xff);
- if (val != 0xff)
- bursts &= val;
- }
+ val = of_getintprop_default(dma_dp, "burst-sizes", 0xff);
+ if (val != 0xff)
+ bursts &= val;
if (sdev->bus) {
u8 val = of_getintprop_default(sdev->bus->ofdev.node,
esp->bursts = bursts;
}
-static void __devinit esp_sbus_get_props(struct esp *esp, struct sbus_dev *espdma)
+static void __devinit esp_sbus_get_props(struct esp *esp, struct of_device *espdma)
{
esp_get_scsi_id(esp);
esp_get_differential(esp);
static dma_addr_t sbus_esp_map_single(struct esp *esp, void *buf,
size_t sz, int dir)
{
- return sbus_map_single(esp->dev, buf, sz, dir);
+ struct sbus_dev *sdev = esp->dev;
+
+ return dma_map_single(&sdev->ofdev.dev, buf, sz, dir);
}
static int sbus_esp_map_sg(struct esp *esp, struct scatterlist *sg,
int num_sg, int dir)
{
- return sbus_map_sg(esp->dev, sg, num_sg, dir);
+ struct sbus_dev *sdev = esp->dev;
+
+ return dma_map_sg(&sdev->ofdev.dev, sg, num_sg, dir);
}
static void sbus_esp_unmap_single(struct esp *esp, dma_addr_t addr,
size_t sz, int dir)
{
- sbus_unmap_single(esp->dev, addr, sz, dir);
+ struct sbus_dev *sdev = esp->dev;
+
+ dma_unmap_single(&sdev->ofdev.dev, addr, sz, dir);
}
static void sbus_esp_unmap_sg(struct esp *esp, struct scatterlist *sg,
int num_sg, int dir)
{
- sbus_unmap_sg(esp->dev, sg, num_sg, dir);
+ struct sbus_dev *sdev = esp->dev;
+
+ dma_unmap_sg(&sdev->ofdev.dev, sg, num_sg, dir);
}
static int sbus_esp_irq_pending(struct esp *esp)
can_do_burst64 = (esp->bursts & DMA_BURST64) != 0;
/* Put the DVMA into a known state. */
- if (esp->dma->revision != dvmahme) {
+ if (esp->dmarev != dvmahme) {
val = dma_read32(DMA_CSR);
dma_write32(val | DMA_RST_SCSI, DMA_CSR);
dma_write32(val & ~DMA_RST_SCSI, DMA_CSR);
}
- switch (esp->dma->revision) {
+ switch (esp->dmarev) {
case dvmahme:
dma_write32(DMA_RESET_FAS366, DMA_CSR);
dma_write32(DMA_RST_SCSI, DMA_CSR);
u32 csr;
int lim;
- if (esp->dma->revision == dvmahme)
+ if (esp->dmarev == dvmahme)
return;
csr = dma_read32(DMA_CSR);
if (!(csr & DMA_FIFO_ISDRAIN))
return;
- if (esp->dma->revision != dvmarev3 && esp->dma->revision != dvmaesc1)
+ if (esp->dmarev != dvmarev3 && esp->dmarev != dvmaesc1)
dma_write32(csr | DMA_FIFO_STDRAIN, DMA_CSR);
lim = 1000;
static void sbus_esp_dma_invalidate(struct esp *esp)
{
- if (esp->dma->revision == dvmahme) {
+ if (esp->dmarev == dvmahme) {
dma_write32(DMA_RST_SCSI, DMA_CSR);
esp->prev_hme_dmacsr = ((esp->prev_hme_dmacsr |
else
csr &= ~DMA_ST_WRITE;
dma_write32(csr, DMA_CSR);
- if (esp->dma->revision == dvmaesc1) {
+ if (esp->dmarev == dvmaesc1) {
u32 end = PAGE_ALIGN(addr + dma_count + 16U);
dma_write32(end - addr, DMA_COUNT);
}
static int __devinit esp_sbus_probe_one(struct device *dev,
struct sbus_dev *esp_dev,
- struct sbus_dev *espdma,
+ struct of_device *espdma,
struct sbus_bus *sbus,
int hme)
{
if (hme)
esp->flags |= ESP_FLAG_WIDE_CAPABLE;
- err = esp_sbus_find_dma(esp, espdma);
+ err = esp_sbus_setup_dma(esp, espdma);
if (err < 0)
goto fail_unlink;
* come up with the reset bit set, so make sure that
* is clear first.
*/
- if (esp->dma->revision == dvmaesc1) {
+ if (esp->dmarev == dvmaesc1) {
u32 val = dma_read32(DMA_CSR);
dma_write32(val & ~DMA_RST_SCSI, DMA_CSR);
fail_free_irq:
free_irq(host->irq, esp);
fail_unmap_command_block:
- sbus_free_consistent(esp->dev, 16,
- esp->command_block,
- esp->command_block_dma);
+ dma_free_coherent(&esp_dev->ofdev.dev, 16,
+ esp->command_block,
+ esp->command_block_dma);
fail_unmap_regs:
sbus_iounmap(esp->regs, SBUS_ESP_REG_SIZE);
fail_unlink:
static int __devinit esp_sbus_probe(struct of_device *dev, const struct of_device_id *match)
{
struct sbus_dev *sdev = to_sbus_device(&dev->dev);
+ struct device_node *dma_node = NULL;
struct device_node *dp = dev->node;
- struct sbus_dev *dma_sdev = NULL;
+ struct of_device *dma_of = NULL;
int hme = 0;
if (dp->parent &&
(!strcmp(dp->parent->name, "espdma") ||
!strcmp(dp->parent->name, "dma")))
- dma_sdev = sdev->parent;
+ dma_node = dp->parent;
else if (!strcmp(dp->name, "SUNW,fas")) {
- dma_sdev = sdev;
+ dma_node = sdev->ofdev.node;
hme = 1;
}
+ if (dma_node)
+ dma_of = of_find_device_by_node(dma_node);
+ if (!dma_of)
+ return -ENODEV;
- return esp_sbus_probe_one(&dev->dev, sdev, dma_sdev,
+ return esp_sbus_probe_one(&dev->dev, sdev, dma_of,
sdev->bus, hme);
}
static int __devexit esp_sbus_remove(struct of_device *dev)
{
struct esp *esp = dev_get_drvdata(&dev->dev);
+ struct sbus_dev *sdev = esp->dev;
+ struct of_device *dma_of = esp->dma;
unsigned int irq = esp->host->irq;
u32 val;
dma_write32(val & ~DMA_INT_ENAB, DMA_CSR);
free_irq(irq, esp);
- sbus_free_consistent(esp->dev, 16,
- esp->command_block,
- esp->command_block_dma);
+ dma_free_coherent(&sdev->ofdev.dev, 16,
+ esp->command_block,
+ esp->command_block_dma);
sbus_iounmap(esp->regs, SBUS_ESP_REG_SIZE);
+ of_iounmap(&dma_of->resource[0], esp->dma_regs,
+ resource_size(&dma_of->resource[0]));
scsi_host_put(esp->host);
projects / cascardo / linux.git / blobdiff