Changeset f14e6ea in mainline for uspace/drv/audio/sb16/sb16.c

Timestamp:

2011-10-21T20:57:40Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

dce7e41

Parents:

7257eea6

Message:

sb16: Add interrupt handler.

Set buffer alignment to something that memalign can handle (might be wrong).

File:

• uspace/drv/audio/sb16/sb16.c (modified) (1 diff)

uspace/drv/audio/sb16/sb16.c

@@ -96 +96 @@
 int sb16_init_mpu(sb16_drv_t *drv, void *regs, size_t size)
 {
+        drv->mpu_regs = NULL;
         return ENOTSUP;
 }
+/*----------------------------------------------------------------------------*/
+void sb16_interrupt(sb16_drv_t *drv)
+{
+        assert(drv);
+        ddf_log_note("SB16 interrupt.\n");
+        /* The acknowledgment of interrupts on DSP version 4.xx is different;
+         * It can contain MPU-401 indicator and DMA16 transfers are acked
+         * differently */
+        if (drv->dsp.version.major >= 4) {
+                pio_write_8(&drv->regs->mixer_address, MIXER_IRQ_ADDRESS);
+                const uint8_t irq_mask = pio_read_8(&drv->regs->mixer_data);
+                ddf_log_note("SB16 IRQ mask %hhx.\n", irq_mask);
+                /* Third bit is MPU-401 interrupt */
+                if (irq_mask & 0x4) {
+                        return;
+                }
+        }
+        sb_dsp_interrupt(&drv->dsp);
+
+}