static void sbus_esp_dma_drain(struct esp *esp)
{
u32 csr;
int lim;
if (esp->dmarev == dvmahme)
return;
csr = dma_read32(DMA_CSR);
if (!(csr & DMA_FIFO_ISDRAIN))
return;
if (esp->dmarev != dvmarev3 && esp->dmarev != dvmaesc1)
dma_write32(csr | DMA_FIFO_STDRAIN, DMA_CSR);
lim = 1000;
while (dma_read32(DMA_CSR) & DMA_FIFO_ISDRAIN) {
if (--lim == 0) {
printk(KERN_ALERT PFX "esp%d: DMA will not drain!\n",
esp->host->unique_id);
break;
}
udelay(1);
}
}
static void sun3x_esp_reset_dma(struct esp *esp)
{
u32 val;
val = dma_read32(DMA_CSR);
dma_write32(val | DMA_RST_SCSI, DMA_CSR);
dma_write32(val & ~DMA_RST_SCSI, DMA_CSR);
/* Enable interrupts. */
val = dma_read32(DMA_CSR);
dma_write32(val | DMA_INT_ENAB, DMA_CSR);
}
static int __devinit esp_sbus_setup_dma(struct esp *esp,
struct platform_device *dma_of)
{
esp->dma = dma_of;
esp->dma_regs = of_ioremap(&dma_of->resource[0], 0,
resource_size(&dma_of->resource[0]),
"espdma");
if (!esp->dma_regs)
return -ENOMEM;
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;
}
return 0;
}
static int sun3x_esp_dma_error(struct esp *esp)
{
u32 csr = dma_read32(DMA_CSR);
if (csr & DMA_HNDL_ERROR)
return 1;
return 0;
}
static void sun3x_esp_send_dma_cmd(struct esp *esp, u32 addr, u32 esp_count,
u32 dma_count, int write, u8 cmd)
{
u32 csr;
BUG_ON(!(cmd & ESP_CMD_DMA));
sun3x_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);
sun3x_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);
csr = dma_read32(DMA_CSR);
csr |= DMA_ENABLE;
if (write)
csr |= DMA_ST_WRITE;
else
csr &= ~DMA_ST_WRITE;
dma_write32(csr, DMA_CSR);
dma_write32(addr, DMA_ADDR);
scsi_esp_cmd(esp, cmd);
}
static int __devexit esp_sun3x_remove(struct platform_device *dev)
{
struct esp *esp = dev_get_drvdata(&dev->dev);
unsigned int irq = esp->host->irq;
u32 val;
scsi_esp_unregister(esp);
/* Disable interrupts. */
val = dma_read32(DMA_CSR);
dma_write32(val & ~DMA_INT_ENAB, DMA_CSR);
free_irq(irq, esp);
dma_free_coherent(esp->dev, 16,
esp->command_block,
esp->command_block_dma);
scsi_host_put(esp->host);
return 0;
}
static void sun3x_esp_dma_invalidate(struct esp *esp)
{
u32 val;
int lim;
lim = 1000;
while ((val = dma_read32(DMA_CSR)) & DMA_PEND_READ) {
if (--lim == 0) {
printk(KERN_ALERT PFX "esp%d: DMA will not "
"invalidate!\n", esp->host->unique_id);
break;
}
udelay(1);
}
val &= ~(DMA_ENABLE | DMA_ST_WRITE | DMA_BCNT_ENAB);
val |= DMA_FIFO_INV;
dma_write32(val, DMA_CSR);
val &= ~DMA_FIFO_INV;
dma_write32(val, DMA_CSR);
}
static void sbus_esp_dma_invalidate(struct esp *esp)
{
if (esp->dmarev == dvmahme) {
dma_write32(DMA_RST_SCSI, DMA_CSR);
esp->prev_hme_dmacsr = ((esp->prev_hme_dmacsr |
(DMA_PARITY_OFF | DMA_2CLKS |
DMA_SCSI_DISAB | DMA_INT_ENAB)) &
~(DMA_ST_WRITE | DMA_ENABLE));
dma_write32(0, DMA_CSR);
dma_write32(esp->prev_hme_dmacsr, DMA_CSR);
/* This is necessary to avoid having the SCSI channel
* engine lock up on us.
*/
dma_write32(0, DMA_ADDR);
} else {
u32 val;
int lim;
lim = 1000;
while ((val = dma_read32(DMA_CSR)) & DMA_PEND_READ) {
if (--lim == 0) {
printk(KERN_ALERT PFX "esp%d: DMA will not "
"invalidate!\n", esp->host->unique_id);
break;
}
udelay(1);
}
val &= ~(DMA_ENABLE | DMA_ST_WRITE | DMA_BCNT_ENAB);
val |= DMA_FIFO_INV;
dma_write32(val, DMA_CSR);
val &= ~DMA_FIFO_INV;
dma_write32(val, DMA_CSR);
}
}
static void sbus_esp_reset_dma(struct esp *esp)
{
int can_do_burst16, can_do_burst32, can_do_burst64;
int can_do_sbus64, lim;
struct platform_device *op;
u32 val;
can_do_burst16 = (esp->bursts & DMA_BURST16) != 0;
can_do_burst32 = (esp->bursts & DMA_BURST32) != 0;
can_do_burst64 = 0;
can_do_sbus64 = 0;
op = esp->dev;
if (sbus_can_dma_64bit())
can_do_sbus64 = 1;
if (sbus_can_burst64())
can_do_burst64 = (esp->bursts & DMA_BURST64) != 0;
/* Put the DVMA into a known state. */
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->dmarev) {
case dvmahme:
dma_write32(DMA_RESET_FAS366, DMA_CSR);
dma_write32(DMA_RST_SCSI, DMA_CSR);
esp->prev_hme_dmacsr = (DMA_PARITY_OFF | DMA_2CLKS |
DMA_SCSI_DISAB | DMA_INT_ENAB);
esp->prev_hme_dmacsr &= ~(DMA_ENABLE | DMA_ST_WRITE |
DMA_BRST_SZ);
if (can_do_burst64)
esp->prev_hme_dmacsr |= DMA_BRST64;
else if (can_do_burst32)
esp->prev_hme_dmacsr |= DMA_BRST32;
if (can_do_sbus64) {
esp->prev_hme_dmacsr |= DMA_SCSI_SBUS64;
sbus_set_sbus64(&op->dev, esp->bursts);
}
lim = 1000;
while (dma_read32(DMA_CSR) & DMA_PEND_READ) {
if (--lim == 0) {
printk(KERN_ALERT PFX "esp%d: DMA_PEND_READ "
"will not clear!\n",
esp->host->unique_id);
break;
}
udelay(1);
}
dma_write32(0, DMA_CSR);
dma_write32(esp->prev_hme_dmacsr, DMA_CSR);
dma_write32(0, DMA_ADDR);
break;
case dvmarev2:
if (esp->rev != ESP100) {
val = dma_read32(DMA_CSR);
dma_write32(val | DMA_3CLKS, DMA_CSR);
}
break;
case dvmarev3:
val = dma_read32(DMA_CSR);
val &= ~DMA_3CLKS;
val |= DMA_2CLKS;
if (can_do_burst32) {
val &= ~DMA_BRST_SZ;
val |= DMA_BRST32;
}
dma_write32(val, DMA_CSR);
break;
case dvmaesc1:
val = dma_read32(DMA_CSR);
val |= DMA_ADD_ENABLE;
val &= ~DMA_BCNT_ENAB;
if (!can_do_burst32 && can_do_burst16) {
val |= DMA_ESC_BURST;
} else {
val &= ~(DMA_ESC_BURST);
}
dma_write32(val, DMA_CSR);
break;
default:
break;
}
/* Enable interrupts. */
val = dma_read32(DMA_CSR);
dma_write32(val | DMA_INT_ENAB, DMA_CSR);
}
static int sbus_esp_irq_pending(struct esp *esp)
{
if (dma_read32(DMA_CSR) & (DMA_HNDL_INTR | DMA_HNDL_ERROR))
return 1;
return 0;
}
