sh4: mmio based CF support on r2d board (Takashi YOSHII).

 This patch adds emulation for a CompactFlash on sh4/r2d board.
 The device is CF, but wired to be worked as True-IDE mode, and connected
 directly to SH bus. So, this code is to support generally mmio based
 IDEs which are supported by "pata_platform" driver in linux kernel.

Signed-off-by: Takashi YOSHII <takasi-y@ops.dti.ne.jp>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5924 c046a42c-6fe2-441c-8c8c-71466251a162

3 files changed, 101 insertions, 0 deletions

diff --git a/hw/ide.c b/hw/ide.c
index 132d16246c..4a1213d30f 100644
--- a/hw/ide.c
+++ b/hw/ide.c
@@ -3414,6 +3414,98 @@ int pmac_ide_init (BlockDriverState **hd_table, qemu_irq irq)
 }
 
 /***********************************************************/
+/* MMIO based ide port
+ * This emulates IDE device connected directly to the CPU bus without
+ * dedicated ide controller, which is often seen on embedded boards.
+ */
+
+typedef struct {
+    void *dev;
+    int shift;
+} MMIOState;
+
+static uint32_t mmio_ide_read (void *opaque, target_phys_addr_t addr)
+{
+    MMIOState *s = (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    addr >>= s->shift;
+    if (addr & 7)
+        return ide_ioport_read(ide, addr);
+    else
+        return ide_data_readw(ide, 0);
+}
+
+static void mmio_ide_write (void *opaque, target_phys_addr_t addr,
+	uint32_t val)
+{
+    MMIOState *s = (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    addr >>= s->shift;
+    if (addr & 7)
+        ide_ioport_write(ide, addr, val);
+    else
+        ide_data_writew(ide, 0, val);
+}
+
+static CPUReadMemoryFunc *mmio_ide_reads[] = {
+    mmio_ide_read,
+    mmio_ide_read,
+    mmio_ide_read,
+};
+
+static CPUWriteMemoryFunc *mmio_ide_writes[] = {
+    mmio_ide_write,
+    mmio_ide_write,
+    mmio_ide_write,
+};
+
+static uint32_t mmio_ide_status_read (void *opaque, target_phys_addr_t addr)
+{
+    MMIOState *s= (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    return ide_status_read(ide, 0);
+}
+
+static void mmio_ide_cmd_write (void *opaque, target_phys_addr_t addr,
+	uint32_t val)
+{
+    MMIOState *s = (MMIOState*)opaque;
+    IDEState *ide = (IDEState*)s->dev;
+    ide_cmd_write(ide, 0, val);
+}
+
+static CPUReadMemoryFunc *mmio_ide_status[] = {
+    mmio_ide_status_read,
+    mmio_ide_status_read,
+    mmio_ide_status_read,
+};
+
+static CPUWriteMemoryFunc *mmio_ide_cmd[] = {
+    mmio_ide_cmd_write,
+    mmio_ide_cmd_write,
+    mmio_ide_cmd_write,
+};
+
+void mmio_ide_init (target_phys_addr_t membase, target_phys_addr_t membase2,
+                    qemu_irq irq, int shift,
+                    BlockDriverState *hd0, BlockDriverState *hd1)
+{
+    MMIOState *s = qemu_mallocz(sizeof(MMIOState));
+    IDEState *ide = qemu_mallocz(sizeof(IDEState) * 2);
+    int mem1, mem2;
+
+    ide_init2(ide, hd0, hd1, irq);
+
+    s->dev = ide;
+    s->shift = shift;
+
+    mem1 = cpu_register_io_memory(0, mmio_ide_reads, mmio_ide_writes, s);
+    mem2 = cpu_register_io_memory(0, mmio_ide_status, mmio_ide_cmd, s);
+    cpu_register_physical_memory(membase, 16 << shift, mem1);
+    cpu_register_physical_memory(membase2, 2 << shift, mem2);
+}
+
+/***********************************************************/
 /* CF-ATA Microdrive */
 
 #define METADATA_SIZE	0x20
diff --git a/hw/r2d.c b/hw/r2d.c
index 5f9f56971b..bdc9085cf7 100644
--- a/hw/r2d.c
+++ b/hw/r2d.c
@@ -149,6 +149,11 @@ static void r2d_init(ram_addr_t ram_size, int vga_ram_size,
     sm501_vga_ram_addr = qemu_ram_alloc(SM501_VRAM_SIZE);
     sm501_init(ds, 0x10000000, sm501_vga_ram_addr, SM501_VRAM_SIZE,
 	       serial_hds[2]);
+
+    /* onboard CF (True IDE mode, Master only). */
+    mmio_ide_init(0x14001000, 0x1400080c, NULL, 1,
+                  drives_table[drive_get_index(IF_IDE, 0, 0)].bdrv, NULL);
+
     /* Todo: register on board registers */
     {
       int kernel_size;
diff --git a/hw/sh.h b/hw/sh.h
index 15c58cb91c..842af598e8 100644
--- a/hw/sh.h
+++ b/hw/sh.h
@@ -45,4 +45,8 @@ void sh_serial_init (target_phys_addr_t base, int feat,
 /* tc58128.c */
 int tc58128_init(struct SH7750State *s, const char *zone1, const char *zone2);
 
+/* ide.c */
+void mmio_ide_init(target_phys_addr_t membase, target_phys_addr_t membase2,
+                   qemu_irq irq, int shift,
+                   BlockDriverState *hd0, BlockDriverState *hd1);
 #endif