Rearrange SCSI disk emulation code.

Add USB mass storage device emulation.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1940 c046a42c-6fe2-441c-8c8c-71466251a162

hw/cdrom.c

@@ -0,0 +1,156 @@
+/*
+ * QEMU ATAPI CD-ROM Emulator
+ * 
+ * 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.
+ */
+
+/* ??? Most of the ATAPI emulation is still in ide.c.  It should be moved
+   here.  */
+
+#include <vl.h>
+
+static void lba_to_msf(uint8_t *buf, int lba)
+{
+    lba += 150;
+    buf[0] = (lba / 75) / 60;
+    buf[1] = (lba / 75) % 60;
+    buf[2] = lba % 75;
+}
+
+/* same toc as bochs. Return -1 if error or the toc length */
+/* XXX: check this */
+int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track)
+{
+    uint8_t *q;
+    int len;
+    
+    if (start_track > 1 && start_track != 0xaa)
+        return -1;
+    q = buf + 2;
+    *q++ = 1; /* first session */
+    *q++ = 1; /* last session */
+    if (start_track <= 1) {
+        *q++ = 0; /* reserved */
+        *q++ = 0x14; /* ADR, control */
+        *q++ = 1;    /* track number */
+        *q++ = 0; /* reserved */
+        if (msf) {
+            *q++ = 0; /* reserved */
+            lba_to_msf(q, 0);
+            q += 3;
+        } else {
+            /* sector 0 */
+            cpu_to_be32wu((uint32_t *)q, 0);
+            q += 4;
+        }
+    }
+    /* lead out track */
+    *q++ = 0; /* reserved */
+    *q++ = 0x16; /* ADR, control */
+    *q++ = 0xaa; /* track number */
+    *q++ = 0; /* reserved */
+    if (msf) {
+        *q++ = 0; /* reserved */
+        lba_to_msf(q, nb_sectors);
+        q += 3;
+    } else {
+        cpu_to_be32wu((uint32_t *)q, nb_sectors);
+        q += 4;
+    }
+    len = q - buf;
+    cpu_to_be16wu((uint16_t *)buf, len - 2);
+    return len;
+}
+
+/* mostly same info as PearPc */
+int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num)
+{
+    uint8_t *q;
+    int len;
+    
+    q = buf + 2;
+    *q++ = 1; /* first session */
+    *q++ = 1; /* last session */
+
+    *q++ = 1; /* session number */
+    *q++ = 0x14; /* data track */
+    *q++ = 0; /* track number */
+    *q++ = 0xa0; /* lead-in */
+    *q++ = 0; /* min */
+    *q++ = 0; /* sec */
+    *q++ = 0; /* frame */
+    *q++ = 0;
+    *q++ = 1; /* first track */
+    *q++ = 0x00; /* disk type */
+    *q++ = 0x00;
+    
+    *q++ = 1; /* session number */
+    *q++ = 0x14; /* data track */
+    *q++ = 0; /* track number */
+    *q++ = 0xa1;
+    *q++ = 0; /* min */
+    *q++ = 0; /* sec */
+    *q++ = 0; /* frame */
+    *q++ = 0;
+    *q++ = 1; /* last track */
+    *q++ = 0x00;
+    *q++ = 0x00;
+    
+    *q++ = 1; /* session number */
+    *q++ = 0x14; /* data track */
+    *q++ = 0; /* track number */
+    *q++ = 0xa2; /* lead-out */
+    *q++ = 0; /* min */
+    *q++ = 0; /* sec */
+    *q++ = 0; /* frame */
+    if (msf) {
+        *q++ = 0; /* reserved */
+        lba_to_msf(q, nb_sectors);
+        q += 3;
+    } else {
+        cpu_to_be32wu((uint32_t *)q, nb_sectors);
+        q += 4;
+    }
+
+    *q++ = 1; /* session number */
+    *q++ = 0x14; /* ADR, control */
+    *q++ = 0;    /* track number */
+    *q++ = 1;    /* point */
+    *q++ = 0; /* min */
+    *q++ = 0; /* sec */
+    *q++ = 0; /* frame */
+    if (msf) {
+        *q++ = 0; 
+        lba_to_msf(q, 0);
+        q += 3;
+    } else {
+        *q++ = 0; 
+        *q++ = 0; 
+        *q++ = 0; 
+        *q++ = 0; 
+    }
+
+    len = q - buf;
+    cpu_to_be16wu((uint16_t *)buf, len - 2);
+    return len;
+}
+
+