dummy cs4231 audio driver for sun4m (Blue Swirl)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2157 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 183 insertions, 0 deletions

diff --git a/hw/cs4231.c b/hw/cs4231.c
new file mode 100644
index 0000000..a154685
--- /dev/null
+++ b/hw/cs4231.c
@@ -0,0 +1,183 @@
+/*
+ * QEMU Crystal CS4231 audio chip emulation
+ *
+ * Copyright (c) 2006 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+/* debug CS4231 */
+//#define DEBUG_CS
+
+/*
+ * In addition to Crystal CS4231 there is a DMA controller on Sparc.
+ */
+#define CS_MAXADDR 0x3f
+#define CS_REGS 16
+#define CS_DREGS 32
+#define CS_MAXDREG (CS_DREGS - 1)
+
+typedef struct CSState {
+    uint32_t regs[CS_REGS];
+    uint8_t dregs[CS_DREGS];
+    void *intctl;
+} CSState;
+
+#define CS_RAP(s) ((s)->regs[0] & CS_MAXDREG)
+#define CS_VER 0xa0
+#define CS_CDC_VER 0x8a
+
+#ifdef DEBUG_CS
+#define DPRINTF(fmt, args...)                           \
+    do { printf("CS: " fmt , ##args); } while (0)
+#define pic_set_irq_new(intctl, irq, level)                             \
+    do { printf("CS: set_irq(%d): %d\n", (irq), (level));               \
+        pic_set_irq_new((intctl), (irq),(level));} while (0)
+#else
+#define DPRINTF(fmt, args...)
+#endif
+
+static void cs_reset(void *opaque)
+{
+    CSState *s = opaque;
+
+    memset(s->regs, 0, CS_REGS * 4);
+    memset(s->dregs, 0, CS_DREGS);
+    s->dregs[12] = CS_CDC_VER;
+    s->dregs[25] = CS_VER;
+}
+
+static uint32_t cs_mem_readl(void *opaque, target_phys_addr_t addr)
+{
+    CSState *s = opaque;
+    uint32_t saddr, ret;
+
+    saddr = (addr & CS_MAXADDR) >> 2;
+    switch (saddr) {
+    case 1:
+        switch (CS_RAP(s)) {
+        case 3: // Write only
+            ret = 0;
+            break;
+        default:
+            ret = s->dregs[CS_RAP(s)];
+            break;
+        }
+        DPRINTF("read dreg[%d]: 0x%8.8x\n", CS_RAP(s), ret);
+	break;
+    default:
+        ret = s->regs[saddr];
+        DPRINTF("read reg[%d]: 0x%8.8x\n", saddr, ret);
+	break;
+    }
+    return ret;
+}
+
+static void cs_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    CSState *s = opaque;
+    uint32_t saddr;
+
+    saddr = (addr & CS_MAXADDR) >> 2;
+    DPRINTF("write reg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->regs[saddr], val);
+    switch (saddr) {
+    case 1:
+        DPRINTF("write dreg[%d]: 0x%2.2x -> 0x%2.2x\n", CS_RAP(s), s->dregs[CS_RAP(s)], val);
+        switch(CS_RAP(s)) {
+        case 11:
+        case 25: // Read only
+            break;
+        case 12:
+            val &= 0x40;
+            val |= CS_CDC_VER; // Codec version
+            s->dregs[CS_RAP(s)] = val;
+            break;
+        default:
+            s->dregs[CS_RAP(s)] = val;
+            break;
+        }
+        break;
+    case 2: // Read only
+        break;
+    case 4:
+        if (val & 1)
+            cs_reset(s);
+        val &= 0x7f;
+        s->regs[saddr] = val;
+        break;
+    default:
+        s->regs[saddr] = val;
+	break;
+    }
+}
+
+static CPUReadMemoryFunc *cs_mem_read[3] = {
+    cs_mem_readl,
+    cs_mem_readl,
+    cs_mem_readl,
+};
+
+static CPUWriteMemoryFunc *cs_mem_write[3] = {
+    cs_mem_writel,
+    cs_mem_writel,
+    cs_mem_writel,
+};
+
+static void cs_save(QEMUFile *f, void *opaque)
+{
+    CSState *s = opaque;
+    unsigned int i;
+
+    for (i = 0; i < CS_REGS; i++)
+        qemu_put_be32s(f, &s->regs[i]);
+
+    qemu_put_buffer(f, s->dregs, CS_DREGS);
+}
+
+static int cs_load(QEMUFile *f, void *opaque, int version_id)
+{
+    CSState *s = opaque;
+    unsigned int i;
+
+    if (version_id > 1)
+        return -EINVAL;
+
+    for (i = 0; i < CS_REGS; i++)
+        qemu_get_be32s(f, &s->regs[i]);
+
+    qemu_get_buffer(f, s->dregs, CS_DREGS);
+    return 0;
+}
+
+void cs_init(target_phys_addr_t base, int irq, void *intctl)
+{
+    int cs_io_memory;
+    CSState *s;
+
+    s = qemu_mallocz(sizeof(CSState));
+    if (!s)
+        return;
+
+    cs_io_memory = cpu_register_io_memory(0, cs_mem_read, cs_mem_write, s);
+    cpu_register_physical_memory(base, CS_MAXADDR, cs_io_memory);
+    register_savevm("cs4231", base, 1, cs_save, cs_load, s);
+    qemu_register_reset(cs_reset, s);
+    cs_reset(s);
+}