Add WM8750 and MAX7310 chips (I2C slaves).

Wolfson Microsystems WM8750 audio chip and Maxim MAX7310 gpio expander chip are used in the Spitz.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2854 c046a42c-6fe2-441c-8c8c-71466251a162

Makefile.target

@@ -459,8 +459,8 @@ VL_OBJS+= versatile_pci.o sd.o ptimer.o
 VL_OBJS+= arm_gic.o realview.o arm_sysctl.o
 VL_OBJS+= arm-semi.o
 VL_OBJS+= pxa2xx.o pxa2xx_pic.o pxa2xx_gpio.o pxa2xx_timer.o pxa2xx_dma.o
-VL_OBJS+= pxa2xx_lcd.o pxa2xx_mmci.o pxa2xx_pcmcia.o max111x.o
-VL_OBJS+= spitz.o ads7846.o ide.o serial.o nand.o $(AUDIODRV)
+VL_OBJS+= pxa2xx_lcd.o pxa2xx_mmci.o pxa2xx_pcmcia.o max111x.o max7310.o
+VL_OBJS+= spitz.o ads7846.o ide.o serial.o nand.o $(AUDIODRV) wm8750.o
 CPPFLAGS += -DHAS_AUDIO
 endif
 ifeq ($(TARGET_BASE_ARCH), sh4)

hw/i2c.h

@@ -46,4 +46,18 @@ void i2c_nack(i2c_bus *bus);
 int i2c_send(i2c_bus *bus, uint8_t data);
 int i2c_recv(i2c_bus *bus);
 
+/* max7310.c */
+i2c_slave *max7310_init(i2c_bus *bus);
+void max7310_reset(i2c_slave *i2c);
+qemu_irq *max7310_gpio_in_get(i2c_slave *i2c);
+void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler);
+
+/* wm8750.c */
+i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio);
+void wm8750_reset(i2c_slave *i2c);
+void wm8750_data_req_set(i2c_slave *i2c,
+                void (*data_req)(void *, int, int), void *opaque);
+void wm8750_dac_dat(void *opaque, uint32_t sample);
+uint32_t wm8750_adc_dat(void *opaque);
+
 #endif

hw/max7310.c

@@ -0,0 +1,188 @@
+/*
+ * MAX7310 8-port GPIO expansion chip.
+ *
+ * Copyright (c) 2006 Openedhand Ltd.
+ * Written by Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This file is licensed under GNU GPL.
+ */
+
+#include "vl.h"
+
+struct max7310_s {
+    i2c_slave i2c;
+    int i2c_command_byte;
+    int len;
+
+    uint8_t level;
+    uint8_t direction;
+    uint8_t polarity;
+    uint8_t status;
+    uint8_t command;
+    qemu_irq handler[8];
+    qemu_irq *gpio_in;
+};
+
+void max7310_reset(i2c_slave *i2c)
+{
+    struct max7310_s *s = (struct max7310_s *) i2c;
+    s->level &= s->direction;
+    s->direction = 0xff;
+    s->polarity = 0xf0;
+    s->status = 0x01;
+    s->command = 0x00;
+}
+
+static int max7310_rx(i2c_slave *i2c)
+{
+    struct max7310_s *s = (struct max7310_s *) i2c;
+
+    switch (s->command) {
+    case 0x00:	/* Input port */
+        return s->level ^ s->polarity;
+        break;
+
+    case 0x01:	/* Output port */
+        return s->level & ~s->direction;
+        break;
+
+    case 0x02:	/* Polarity inversion */
+        return s->polarity;
+
+    case 0x03:	/* Configuration */
+        return s->direction;
+
+    case 0x04:	/* Timeout */
+        return s->status;
+        break;
+
+    case 0xff:	/* Reserved */
+        return 0xff;
+
+    default:
+#ifdef VERBOSE
+        printf("%s: unknown register %02x\n", __FUNCTION__, s->command);
+#endif
+        break;
+    }
+    return 0xff;
+}
+
+static int max7310_tx(i2c_slave *i2c, uint8_t data)
+{
+    struct max7310_s *s = (struct max7310_s *) i2c;
+    uint8_t diff;
+    int line;
+
+    if (s->len ++ > 1) {
+#ifdef VERBOSE
+        printf("%s: message too long (%i bytes)\n", __FUNCTION__, s->len);
+#endif
+        return 1;
+    }
+
+    if (s->i2c_command_byte) {
+        s->command = data;
+        s->i2c_command_byte = 0;
+        return 0;
+    }
+
+    switch (s->command) {
+    case 0x01:	/* Output port */
+        for (diff = (data ^ s->level) & ~s->direction; diff;
+                        diff &= ~(1 << line)) {
+            line = ffs(diff) - 1;
+            if (s->handler[line])
+                qemu_set_irq(s->handler[line], (data >> line) & 1);
+        }
+        s->level = (s->level & s->direction) | (data & ~s->direction);
+        break;
+
+    case 0x02:	/* Polarity inversion */
+        s->polarity = data;
+        break;
+
+    case 0x03:	/* Configuration */
+        s->level &= ~(s->direction ^ data);
+        s->direction = data;
+        break;
+
+    case 0x04:	/* Timeout */
+        s->status = data;
+        break;
+
+    case 0x00:	/* Input port - ignore writes */
+	break;
+    default:
+#ifdef VERBOSE
+        printf("%s: unknown register %02x\n", __FUNCTION__, s->command);
+#endif
+        return 1;
+    }
+
+    return 0;
+}
+
+static void max7310_event(i2c_slave *i2c, enum i2c_event event)
+{
+    struct max7310_s *s = (struct max7310_s *) i2c;
+    s->len = 0;
+
+    switch (event) {
+    case I2C_START_SEND:
+        s->i2c_command_byte = 1;
+        break;
+    case I2C_FINISH:
+        if (s->len == 1)
+#ifdef VERBOSE
+            printf("%s: message too short (%i bytes)\n", __FUNCTION__, s->len);
+#endif
+        break;
+    default:
+        break;
+    }
+}
+
+static void max7310_gpio_set(void *opaque, int line, int level)
+{
+    struct max7310_s *s = (struct max7310_s *) opaque;
+    if (line >= sizeof(s->handler) / sizeof(*s->handler) || line  < 0)
+        cpu_abort(cpu_single_env, "bad GPIO line");
+
+    if (level)
+        s->level |= s->direction & (1 << line);
+    else
+        s->level &= ~(s->direction & (1 << line));
+}
+
+/* MAX7310 is SMBus-compatible (can be used with only SMBus protocols),
+ * but also accepts sequences that are not SMBus so return an I2C device.  */
+struct i2c_slave *max7310_init(i2c_bus *bus)
+{
+    struct max7310_s *s = (struct max7310_s *)
+            i2c_slave_init(bus, 0, sizeof(struct max7310_s));
+    s->i2c.event = max7310_event;
+    s->i2c.recv = max7310_rx;
+    s->i2c.send = max7310_tx;
+    s->gpio_in = qemu_allocate_irqs(max7310_gpio_set, s,
+                    sizeof(s->handler) / sizeof(*s->handler));
+
+    max7310_reset(&s->i2c);
+
+    return &s->i2c;
+}
+
+qemu_irq *max7310_gpio_in_get(i2c_slave *i2c)
+{
+    struct max7310_s *s = (struct max7310_s *) i2c;
+    return s->gpio_in;
+}
+
+void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler)
+{
+    struct max7310_s *s = (struct max7310_s *) i2c;
+    if (line >= sizeof(s->handler) / sizeof(*s->handler) || line  < 0)
+        cpu_abort(cpu_single_env, "bad GPIO line");
+
+    s->handler[line] = handler;
+}

hw/spitz.c

@@ -801,6 +801,57 @@ static void spitz_microdrive_attach(struct pxa2xx_state_s *cpu)
     }
 }
 
+/* Wm8750 and Max7310 on I2C */
+
+#define AKITA_MAX_ADDR	0x18
+#define SPITZ_WM_ADDRL	0x1a
+#define SPITZ_WM_ADDRH	0x1b
+
+#define SPITZ_GPIO_WM	5
+
+#ifdef HAS_AUDIO
+static void spitz_wm8750_addr(int line, int level, void *opaque)
+{
+    i2c_slave *wm = (i2c_slave *) opaque;
+    if (level)
+        i2c_set_slave_address(wm, SPITZ_WM_ADDRH);
+    else
+        i2c_set_slave_address(wm, SPITZ_WM_ADDRL);
+}
+#endif
+
+static void spitz_i2c_setup(struct pxa2xx_state_s *cpu)
+{
+    /* Attach the CPU on one end of our I2C bus.  */
+    i2c_bus *bus = pxa2xx_i2c_bus(cpu->i2c[0]);
+
+#ifdef HAS_AUDIO
+    AudioState *audio;
+    i2c_slave *wm;
+
+    audio = AUD_init();
+    if (!audio)
+        return;
+    /* Attach a WM8750 to the bus */
+    wm = wm8750_init(bus, audio);
+
+    spitz_wm8750_addr(0, 0, wm);
+    pxa2xx_gpio_handler_set(cpu->gpio, SPITZ_GPIO_WM, spitz_wm8750_addr, wm);
+    /* .. and to the sound interface.  */
+    cpu->i2s->opaque = wm;
+    cpu->i2s->codec_out = wm8750_dac_dat;
+    cpu->i2s->codec_in = wm8750_adc_dat;
+    wm8750_data_req_set(wm, cpu->i2s->data_req, cpu->i2s);
+#endif
+}
+
+static void spitz_akita_i2c_setup(struct pxa2xx_state_s *cpu)
+{
+    /* Attach a Max7310 to Akita I2C bus.  */
+    i2c_set_slave_address(max7310_init(pxa2xx_i2c_bus(cpu->i2c[0])),
+                    AKITA_MAX_ADDR);
+}
+
 /* Other peripherals */
 
 static void spitz_charge_switch(int line, int level, void *opaque)
@@ -1026,6 +1077,11 @@ static void spitz_common_init(int ram_size, int vga_ram_size,
 
     spitz_gpio_setup(cpu, (model == akita) ? 1 : 2);
 
+    spitz_i2c_setup(cpu);
+
+    if (model == akita)
+        spitz_akita_i2c_setup(cpu);
+
     if (model == terrier)
         /* A 6.0 GB microdrive is permanently sitting in CF slot 0.  */
         spitz_microdrive_attach(cpu);

hw/wm8750.c

@@ -0,0 +1,545 @@
+/*
+ * WM8750 audio CODEC.
+ *
+ * Copyright (c) 2006 Openedhand Ltd.
+ * Written by Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This file is licensed under GNU GPL.
+ */
+
+#include "vl.h"
+
+#define IN_PORT_N	3
+#define OUT_PORT_N	3
+
+#define CODEC		"wm8750"
+
+struct wm_rate_s;
+struct wm8750_s {
+    i2c_slave i2c;
+    uint8_t i2c_data[2];
+    int i2c_len;
+    QEMUSoundCard card;
+    SWVoiceIn *adc_voice[IN_PORT_N];
+    SWVoiceOut *dac_voice[OUT_PORT_N];
+    int enable;
+    void (*data_req)(void *, int, int);
+    void *opaque;
+    uint8_t data_in[4096];
+    uint8_t data_out[4096];
+    int idx_in, req_in;
+    int idx_out, req_out;
+
+    SWVoiceOut **out[2];
+    uint8_t outvol[7], outmute[2];
+    SWVoiceIn **in[2];
+    uint8_t invol[4], inmute[2];
+
+    uint8_t diff[2], pol, ds, monomix[2], alc, mute;
+    uint8_t path[4], mpath[2], power, format;
+    uint32_t inmask, outmask;
+    const struct wm_rate_s *rate;
+};
+
+static inline void wm8750_in_load(struct wm8750_s *s)
+{
+    int acquired;
+    if (s->idx_in + s->req_in <= sizeof(s->data_in))
+        return;
+    s->idx_in = audio_MAX(0, (int) sizeof(s->data_in) - s->req_in);
+    acquired = AUD_read(*s->in[0], s->data_in + s->idx_in,
+                    sizeof(s->data_in) - s->idx_in);
+}
+
+static inline void wm8750_out_flush(struct wm8750_s *s)
+{
+    int sent;
+    if (!s->idx_out)
+        return;
+    sent = AUD_write(*s->out[0], s->data_out, s->idx_out);
+    s->idx_out = 0;
+}
+
+static void wm8750_audio_in_cb(void *opaque, int avail_b)
+{
+    struct wm8750_s *s = (struct wm8750_s *) opaque;
+    s->req_in = avail_b;
+    s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
+
+#if 0
+    wm8750_in_load(s);
+#endif
+}
+
+static void wm8750_audio_out_cb(void *opaque, int free_b)
+{
+    struct wm8750_s *s = (struct wm8750_s *) opaque;
+    wm8750_out_flush(s);
+
+    s->req_out = free_b;
+    s->data_req(s->opaque, free_b >> 2, s->req_in >> 2);
+}
+
+struct wm_rate_s {
+    int adc;
+    int adc_hz;
+    int dac;
+    int dac_hz;
+};
+
+static const struct wm_rate_s wm_rate_table[] = {
+    {  256, 48000,  256, 48000 },	/* SR: 00000 */
+    {  384, 48000,  384, 48000 },	/* SR: 00001 */
+    {  256, 48000, 1536,  8000 },	/* SR: 00010 */
+    {  384, 48000, 2304,  8000 },	/* SR: 00011 */
+    { 1536,  8000,  256, 48000 },	/* SR: 00100 */
+    { 2304,  8000,  384, 48000 },	/* SR: 00101 */
+    { 1536,  8000, 1536,  8000 },	/* SR: 00110 */
+    { 2304,  8000, 2304,  8000 },	/* SR: 00111 */
+    { 1024, 12000, 1024, 12000 },	/* SR: 01000 */
+    { 1526, 12000, 1536, 12000 },	/* SR: 01001 */
+    {  768, 16000,  768, 16000 },	/* SR: 01010 */
+    { 1152, 16000, 1152, 16000 },	/* SR: 01011 */
+    {  384, 32000,  384, 32000 },	/* SR: 01100 */
+    {  576, 32000,  576, 32000 },	/* SR: 01101 */
+    {  128, 96000,  128, 96000 },	/* SR: 01110 */
+    {  192, 96000,  192, 96000 },	/* SR: 01111 */
+    {  256, 44100,  256, 44100 },	/* SR: 10000 */
+    {  384, 44100,  384, 44100 },	/* SR: 10001 */
+    {  256, 44100, 1408,  8018 },	/* SR: 10010 */
+    {  384, 44100, 2112,  8018 },	/* SR: 10011 */
+    { 1408,  8018,  256, 44100 },	/* SR: 10100 */
+    { 2112,  8018,  384, 44100 },	/* SR: 10101 */
+    { 1408,  8018, 1408,  8018 },	/* SR: 10110 */
+    { 2112,  8018, 2112,  8018 },	/* SR: 10111 */
+    { 1024, 11025, 1024, 11025 },	/* SR: 11000 */
+    { 1536, 11025, 1536, 11025 },	/* SR: 11001 */
+    {  512, 22050,  512, 22050 },	/* SR: 11010 */
+    {  768, 22050,  768, 22050 },	/* SR: 11011 */
+    {  512, 24000,  512, 24000 },	/* SR: 11100 */
+    {  768, 24000,  768, 24000 },	/* SR: 11101 */
+    {  128, 88200,  128, 88200 },	/* SR: 11110 */
+    {  192, 88200,  128, 88200 },	/* SR: 11111 */
+};
+
+void wm8750_set_format(struct wm8750_s *s)
+{
+    int i;
+    audsettings_t in_fmt;
+    audsettings_t out_fmt;
+    audsettings_t monoout_fmt;
+
+    wm8750_out_flush(s);
+
+    if (s->in[0] && *s->in[0])
+        AUD_set_active_in(*s->in[0], 0);
+    if (s->out[0] && *s->out[0])
+        AUD_set_active_out(*s->out[0], 0);
+
+    for (i = 0; i < IN_PORT_N; i ++)
+        if (s->adc_voice[i]) {
+            AUD_close_in(&s->card, s->adc_voice[i]);
+            s->adc_voice[i] = 0;
+        }
+    for (i = 0; i < OUT_PORT_N; i ++)
+        if (s->dac_voice[i]) {
+            AUD_close_out(&s->card, s->dac_voice[i]);
+            s->dac_voice[i] = 0;
+        }
+
+    if (!s->enable)
+        return;
+
+    /* Setup input */
+    in_fmt.endianness = 0;
+    in_fmt.nchannels = 2;
+    in_fmt.freq = s->rate->adc_hz;
+    in_fmt.fmt = AUD_FMT_S16;
+
+    s->adc_voice[0] = AUD_open_in(&s->card, s->adc_voice[0],
+                    CODEC ".input1", s, wm8750_audio_in_cb, &in_fmt);
+    s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
+                    CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
+    s->adc_voice[2] = AUD_open_in(&s->card, s->adc_voice[2],
+                    CODEC ".input3", s, wm8750_audio_in_cb, &in_fmt);
+
+    /* Setup output */
+    out_fmt.endianness = 0;
+    out_fmt.nchannels = 2;
+    out_fmt.freq = s->rate->dac_hz;
+    out_fmt.fmt = AUD_FMT_S16;
+    monoout_fmt.endianness = 0;
+    monoout_fmt.nchannels = 1;
+    monoout_fmt.freq = s->rate->dac_hz;
+    monoout_fmt.fmt = AUD_FMT_S16;
+
+    s->dac_voice[0] = AUD_open_out(&s->card, s->dac_voice[0],
+                    CODEC ".speaker", s, wm8750_audio_out_cb, &out_fmt);
+    s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
+                    CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
+    /* MONOMIX is also in stereo for simplicity */
+    s->dac_voice[2] = AUD_open_out(&s->card, s->dac_voice[2],
+                    CODEC ".monomix", s, wm8750_audio_out_cb, &out_fmt);
+    /* no sense emulating OUT3 which is a mix of other outputs */
+
+    /* We should connect the left and right channels to their
+     * respective inputs/outputs but we have completely no need
+     * for mixing or combining paths to different ports, so we
+     * connect both channels to where the left channel is routed.  */
+    if (s->in[0] && *s->in[0])
+        AUD_set_active_in(*s->in[0], 1);
+    if (s->out[0] && *s->out[0])
+        AUD_set_active_out(*s->out[0], 1);
+}
+
+void inline wm8750_mask_update(struct wm8750_s *s)
+{
+#define R_ONLY	0x0000ffff
+#define L_ONLY	0xffff0000
+#define BOTH	(R_ONLY | L_ONLY)
+#define NONE	(R_ONLY & L_ONLY)
+    s->inmask =
+            (s->inmute[0] ? R_ONLY : BOTH) &
+            (s->inmute[1] ? L_ONLY : BOTH) &
+            (s->mute ? NONE : BOTH);
+    s->outmask =
+            (s->outmute[0] ? R_ONLY : BOTH) &
+            (s->outmute[1] ? L_ONLY : BOTH) &
+            (s->mute ? NONE : BOTH);
+}
+
+void wm8750_reset(i2c_slave *i2c)
+{
+    struct wm8750_s *s = (struct wm8750_s *) i2c;
+    s->enable = 0;
+    wm8750_set_format(s);
+    s->diff[0] = 0;
+    s->diff[1] = 0;
+    s->ds = 0;
+    s->alc = 0;
+    s->in[0] = &s->adc_voice[0];
+    s->invol[0] = 0x17;
+    s->invol[1] = 0x17;
+    s->invol[2] = 0xc3;
+    s->invol[3] = 0xc3;
+    s->out[0] = &s->dac_voice[0];
+    s->outvol[0] = 0xff;
+    s->outvol[1] = 0xff;
+    s->outvol[2] = 0x79;
+    s->outvol[3] = 0x79;
+    s->outvol[4] = 0x79;
+    s->outvol[5] = 0x79;
+    s->inmute[0] = 0;
+    s->inmute[1] = 0;
+    s->outmute[0] = 0;
+    s->outmute[1] = 0;
+    s->mute = 1;
+    s->path[0] = 0;
+    s->path[1] = 0;
+    s->path[2] = 0;
+    s->path[3] = 0;
+    s->mpath[0] = 0;
+    s->mpath[1] = 0;
+    s->format = 0x0a;
+    s->idx_in = sizeof(s->data_in);
+    s->req_in = 0;
+    s->idx_out = 0;
+    s->req_out = 0;
+    wm8750_mask_update(s);
+    s->i2c_len = 0;
+}
+
+static void wm8750_event(i2c_slave *i2c, enum i2c_event event)
+{
+    struct wm8750_s *s = (struct wm8750_s *) i2c;
+
+    switch (event) {
+    case I2C_START_SEND:
+        s->i2c_len = 0;
+        break;
+    case I2C_FINISH:
+#ifdef VERBOSE
+        if (s->i2c_len < 2)
+            printf("%s: message too short (%i bytes)\n",
+                            __FUNCTION__, s->i2c_len);
+#endif
+        break;
+    default:
+        break;
+    }
+}
+
+#define WM8750_LINVOL	0x00
+#define WM8750_RINVOL	0x01
+#define WM8750_LOUT1V	0x02
+#define WM8750_ROUT1V	0x03
+#define WM8750_ADCDAC	0x05
+#define WM8750_IFACE	0x07
+#define WM8750_SRATE	0x08
+#define WM8750_LDAC	0x0a
+#define WM8750_RDAC	0x0b
+#define WM8750_BASS	0x0c
+#define WM8750_TREBLE	0x0d
+#define WM8750_RESET	0x0f
+#define WM8750_3D	0x10
+#define WM8750_ALC1	0x11
+#define WM8750_ALC2	0x12
+#define WM8750_ALC3	0x13
+#define WM8750_NGATE	0x14
+#define WM8750_LADC	0x15
+#define WM8750_RADC	0x16
+#define WM8750_ADCTL1	0x17
+#define WM8750_ADCTL2	0x18
+#define WM8750_PWR1	0x19
+#define WM8750_PWR2	0x1a
+#define WM8750_ADCTL3	0x1b
+#define WM8750_ADCIN	0x1f
+#define WM8750_LADCIN	0x20
+#define WM8750_RADCIN	0x21
+#define WM8750_LOUTM1	0x22
+#define WM8750_LOUTM2	0x23
+#define WM8750_ROUTM1	0x24
+#define WM8750_ROUTM2	0x25
+#define WM8750_MOUTM1	0x26
+#define WM8750_MOUTM2	0x27
+#define WM8750_LOUT2V	0x28
+#define WM8750_ROUT2V	0x29
+#define WM8750_MOUTV	0x2a
+
+static int wm8750_tx(i2c_slave *i2c, uint8_t data)
+{
+    struct wm8750_s *s = (struct wm8750_s *) i2c;
+    uint8_t cmd;
+    uint16_t value;
+
+    if (s->i2c_len >= 2) {
+        printf("%s: long message (%i bytes)\n", __FUNCTION__, s->i2c_len);
+#ifdef VERBOSE
+        return 1;
+#endif
+    }
+    s->i2c_data[s->i2c_len ++] = data;
+    if (s->i2c_len != 2)
+        return 0;
+
+    cmd = s->i2c_data[0] >> 1;
+    value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;
+
+    switch (cmd) {
+    case WM8750_LADCIN:	/* ADC Signal Path Control (Left) */
+        s->diff[0] = (((value >> 6) & 3) == 3);	/* LINSEL */
+        if (s->diff[0])
+            s->in[0] = &s->adc_voice[0 + s->ds * 1];
+        else
+            s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
+        break;
+
+    case WM8750_RADCIN:	/* ADC Signal Path Control (Right) */
+        s->diff[1] = (((value >> 6) & 3) == 3);	/* RINSEL */
+        if (s->diff[1])
+            s->in[1] = &s->adc_voice[0 + s->ds * 1];
+        else
+            s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
+        break;
+
+    case WM8750_ADCIN:	/* ADC Input Mode */
+        s->ds = (value >> 8) & 1;	/* DS */
+        if (s->diff[0])
+            s->in[0] = &s->adc_voice[0 + s->ds * 1];
+        if (s->diff[1])
+            s->in[1] = &s->adc_voice[0 + s->ds * 1];
+        s->monomix[0] = (value >> 6) & 3;	/* MONOMIX */
+        break;
+
+    case WM8750_ADCTL1:	/* Additional Control (1) */
+        s->monomix[1] = (value >> 1) & 1;	/* DMONOMIX */
+        break;
+
+    case WM8750_PWR1:	/* Power Management (1) */
+        s->enable = ((value >> 6) & 7) == 3;	/* VMIDSEL, VREF */
+        wm8750_set_format(s);
+        break;
+
+    case WM8750_LINVOL:	/* Left Channel PGA */
+        s->invol[0] = value & 0x3f;		/* LINVOL */
+        s->inmute[0] = (value >> 7) & 1;	/* LINMUTE */
+        wm8750_mask_update(s);
+        break;
+
+    case WM8750_RINVOL:	/* Right Channel PGA */
+        s->invol[1] = value & 0x3f;		/* RINVOL */
+        s->inmute[1] = (value >> 7) & 1;	/* RINMUTE */
+        wm8750_mask_update(s);
+        break;
+
+    case WM8750_ADCDAC:	/* ADC and DAC Control */
+        s->pol = (value >> 5) & 3;		/* ADCPOL */
+        s->mute = (value >> 3) & 1;		/* DACMU */
+        wm8750_mask_update(s);
+        break;
+
+    case WM8750_ADCTL3:	/* Additional Control (3) */
+        break;
+
+    case WM8750_LADC:	/* Left ADC Digital Volume */
+        s->invol[2] = value & 0xff;		/* LADCVOL */
+        break;
+
+    case WM8750_RADC:	/* Right ADC Digital Volume */
+        s->invol[3] = value & 0xff;		/* RADCVOL */
+        break;
+
+    case WM8750_ALC1:	/* ALC Control (1) */
+        s->alc = (value >> 7) & 3;		/* ALCSEL */
+        break;
+
+    case WM8750_NGATE:	/* Noise Gate Control */
+    case WM8750_3D:	/* 3D enhance */
+        break;
+
+    case WM8750_LDAC:	/* Left Channel Digital Volume */
+        s->outvol[0] = value & 0xff;		/* LDACVOL */
+        break;
+
+    case WM8750_RDAC:	/* Right Channel Digital Volume */
+        s->outvol[1] = value & 0xff;		/* RDACVOL */
+        break;
+
+    case WM8750_BASS:	/* Bass Control */
+        break;
+
+    case WM8750_LOUTM1:	/* Left Mixer Control (1) */
+        s->path[0] = (value >> 8) & 1;		/* LD2LO */
+        break;
+
+    case WM8750_LOUTM2:	/* Left Mixer Control (2) */
+        s->path[1] = (value >> 8) & 1;		/* RD2LO */
+        break;
+
+    case WM8750_ROUTM1:	/* Right Mixer Control (1) */
+        s->path[2] = (value >> 8) & 1;		/* LD2RO */
+        break;
+
+    case WM8750_ROUTM2:	/* Right Mixer Control (2) */
+        s->path[3] = (value >> 8) & 1;		/* RD2RO */
+        break;
+
+    case WM8750_MOUTM1:	/* Mono Mixer Control (1) */
+        s->mpath[0] = (value >> 8) & 1;		/* LD2MO */
+        break;
+
+    case WM8750_MOUTM2:	/* Mono Mixer Control (2) */
+        s->mpath[1] = (value >> 8) & 1;		/* RD2MO */
+        break;
+
+    case WM8750_LOUT1V:	/* LOUT1 Volume */
+        s->outvol[2] = value & 0x7f;		/* LOUT2VOL */
+        break;
+
+    case WM8750_LOUT2V:	/* LOUT2 Volume */
+        s->outvol[4] = value & 0x7f;		/* LOUT2VOL */
+        break;
+
+    case WM8750_ROUT1V:	/* ROUT1 Volume */
+        s->outvol[3] = value & 0x7f;		/* ROUT2VOL */
+        break;
+
+    case WM8750_ROUT2V:	/* ROUT2 Volume */
+        s->outvol[5] = value & 0x7f;		/* ROUT2VOL */
+        break;
+
+    case WM8750_MOUTV:	/* MONOOUT Volume */
+        s->outvol[6] = value & 0x7f;		/* MONOOUTVOL */
+        break;
+
+    case WM8750_ADCTL2:	/* Additional Control (2) */
+        break;
+
+    case WM8750_PWR2:	/* Power Management (2) */
+        s->power = value & 0x7e;
+        break;
+
+    case WM8750_IFACE:	/* Digital Audio Interface Format */
+#ifdef VERBOSE
+        if (value & 0x40)			/* MS */
+            printf("%s: attempt to enable Master Mode\n", __FUNCTION__);
+#endif
+        s->format = value;
+        wm8750_set_format(s);
+        break;
+
+    case WM8750_SRATE:	/* Clocking and Sample Rate Control */
+        s->rate = &wm_rate_table[(value >> 1) & 0x1f];
+        wm8750_set_format(s);
+        break;
+
+    case WM8750_RESET:	/* Reset */
+        wm8750_reset(&s->i2c);
+        break;
+
+#ifdef VERBOSE
+    default:
+        printf("%s: unknown register %02x\n", __FUNCTION__, cmd);
+#endif
+    }
+
+    return 0;
+}
+
+static int wm8750_rx(i2c_slave *i2c)
+{
+    return 0x00;
+}
+
+i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio)
+{
+    struct wm8750_s *s = (struct wm8750_s *)
+            i2c_slave_init(bus, 0, sizeof(struct wm8750_s));
+    s->i2c.event = wm8750_event;
+    s->i2c.recv = wm8750_rx;
+    s->i2c.send = wm8750_tx;
+
+    AUD_register_card(audio, CODEC, &s->card);
+    wm8750_reset(&s->i2c);
+
+    return &s->i2c;
+}
+
+void wm8750_fini(i2c_slave *i2c)
+{
+    struct wm8750_s *s = (struct wm8750_s *) i2c;
+    wm8750_reset(&s->i2c);
+    AUD_remove_card(&s->card);
+    qemu_free(s);
+}
+
+void wm8750_data_req_set(i2c_slave *i2c,
+                void (*data_req)(void *, int, int), void *opaque)
+{
+    struct wm8750_s *s = (struct wm8750_s *) i2c;
+    s->data_req = data_req;
+    s->opaque = opaque;
+}
+
+void wm8750_dac_dat(void *opaque, uint32_t sample)
+{
+    struct wm8750_s *s = (struct wm8750_s *) opaque;
+    uint32_t *data = (uint32_t *) &s->data_out[s->idx_out];
+    *data = sample & s->outmask;
+    s->req_out -= 4;
+    s->idx_out += 4;
+    if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
+        wm8750_out_flush(s);
+}
+
+uint32_t wm8750_adc_dat(void *opaque)
+{
+    struct wm8750_s *s = (struct wm8750_s *) opaque;
+    uint32_t *data;
+    if (s->idx_in >= sizeof(s->data_in))
+        wm8750_in_load(s);
+    data = (uint32_t *) &s->data_in[s->idx_in];
+    s->req_in -= 4;
+    s->idx_in += 4;
+    return *data & s->inmask;
+}