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authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2006-09-10 19:25:12 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2006-09-10 19:25:12 +0000
commitb8174937ed2c885aca5b9b08773a34397d802717 (patch)
treee249bb8fc8c80164ed471cba7f468b8f20352665 /hw/cs4231.c
parent519945dfbe270059cf012863b97343c752f634cf (diff)
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dummy cs4231 audio driver for sun4m (Blue Swirl)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2157 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/cs4231.c')
-rw-r--r--hw/cs4231.c183
1 files changed, 183 insertions, 0 deletions
diff --git a/hw/cs4231.c b/hw/cs4231.c
new file mode 100644
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--- /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);
+}