hw/arm/omap1: Remove unused omap_uwire_attach() method

The recently removed 'cheetah' machine was the single user
of the omap_uwire_attach() method. Remove it altogether with
the uWireSlave structure. Replace the send/receive callbacks
by Unimplemented logging.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/omap1.c

@@ -2170,29 +2170,27 @@ struct omap_uwire_s {
     uint16_t rxbuf;
     uint16_t control;
     uint16_t setup[5];
-
-    uWireSlave *chip[4];
 };
 
 static void omap_uwire_transfer_start(struct omap_uwire_s *s)
 {
     int chipselect = (s->control >> 10) & 3;		/* INDEX */
-    uWireSlave *slave = s->chip[chipselect];
 
     if ((s->control >> 5) & 0x1f) {			/* NB_BITS_WR */
-        if (s->control & (1 << 12))			/* CS_CMD */
-            if (slave && slave->send)
-                slave->send(slave->opaque,
-                                s->txbuf >> (16 - ((s->control >> 5) & 0x1f)));
+        if (s->control & (1 << 12)) {       /* CS_CMD */
+            qemu_log_mask(LOG_UNIMP, "uWireSlave TX CS:%d data:0x%04x\n",
+                          chipselect,
+                          s->txbuf >> (16 - ((s->control >> 5) & 0x1f)));
+        }
         s->control &= ~(1 << 14);			/* CSRB */
         /* TODO: depending on s->setup[4] bits [1:0] assert an IRQ or
          * a DRQ.  When is the level IRQ supposed to be reset?  */
     }
 
     if ((s->control >> 0) & 0x1f) {			/* NB_BITS_RD */
-        if (s->control & (1 << 12))			/* CS_CMD */
-            if (slave && slave->receive)
-                s->rxbuf = slave->receive(slave->opaque);
+        if (s->control & (1 << 12)) {       /* CS_CMD */
+            qemu_log_mask(LOG_UNIMP, "uWireSlave RX CS:%d\n", chipselect);
+        }
         s->control |= 1 << 15;				/* RDRB */
         /* TODO: depending on s->setup[4] bits [1:0] assert an IRQ or
          * a DRQ.  When is the level IRQ supposed to be reset?  */
@@ -2321,17 +2319,6 @@ static struct omap_uwire_s *omap_uwire_init(MemoryRegion *system_memory,
     return s;
 }
 
-void omap_uwire_attach(struct omap_uwire_s *s,
-                uWireSlave *slave, int chipselect)
-{
-    if (chipselect < 0 || chipselect > 3) {
-        error_report("%s: Bad chipselect %i", __func__, chipselect);
-        exit(-1);
-    }
-
-    s->chip[chipselect] = slave;
-}
-
 /* Pseudonoise Pulse-Width Light Modulator */
 struct omap_pwl_s {
     MemoryRegion iomem;

include/hw/arm/omap.h

@@ -490,15 +490,7 @@ qemu_irq *omap_mpuio_in_get(struct omap_mpuio_s *s);
 void omap_mpuio_out_set(struct omap_mpuio_s *s, int line, qemu_irq handler);
 void omap_mpuio_key(struct omap_mpuio_s *s, int row, int col, int down);
 
-typedef struct uWireSlave {
-    uint16_t (*receive)(void *opaque);
-    void (*send)(void *opaque, uint16_t data);
-    void *opaque;
-} uWireSlave;
-
 struct omap_uwire_s;
-void omap_uwire_attach(struct omap_uwire_s *s,
-                uWireSlave *slave, int chipselect);
 
 struct I2SCodec {
     void *opaque;