PIIX4 SMBus host, EEPROM device emulation, by Ed Swierk.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2379 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 94 insertions, 0 deletions

diff --git a/hw/smbus_eeprom.c b/hw/smbus_eeprom.c
new file mode 100644
index 0000000000..d401b17565
--- /dev/null
+++ b/hw/smbus_eeprom.c
@@ -0,0 +1,94 @@
+/*
+ * QEMU SMBus EEPROM device
+ * 
+ * Copyright (c) 2007 Arastra, Inc.
+ * 
+ * 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"
+
+//#define DEBUG
+
+typedef struct SMBusEEPROMDevice {
+    SMBusDevice dev;
+    uint8_t *data;
+    uint8_t offset;
+} SMBusEEPROMDevice;
+
+static void eeprom_quick_cmd(SMBusDevice *dev, uint8_t read)
+{
+#ifdef DEBUG
+    printf("eeprom_quick_cmd: addr=0x%02x read=%d\n", dev->addr, read);
+#endif
+}
+
+static void eeprom_send_byte(SMBusDevice *dev, uint8_t val)
+{
+    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
+#ifdef DEBUG
+    printf("eeprom_send_byte: addr=0x%02x val=0x%02x\n", dev->addr, val);
+#endif
+    eeprom->offset = val;
+}
+
+static uint8_t eeprom_receive_byte(SMBusDevice *dev)
+{
+    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
+    uint8_t val = eeprom->data[eeprom->offset++];
+#ifdef DEBUG
+    printf("eeprom_receive_byte: addr=0x%02x val=0x%02x\n", dev->addr, val);
+#endif
+    return val;
+}
+
+static void eeprom_write_byte(SMBusDevice *dev, uint8_t cmd, uint8_t val)
+{
+    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
+#ifdef DEBUG
+    printf("eeprom_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev->addr,
+           cmd, val);
+#endif
+    eeprom->data[cmd] = val;
+}
+
+static uint8_t eeprom_read_byte(SMBusDevice *dev, uint8_t cmd)
+{
+    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
+    uint8_t val = eeprom->data[cmd];
+#ifdef DEBUG
+    printf("eeprom_read_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev->addr,
+           cmd, val);
+#endif
+    return val;
+}
+
+SMBusDevice *smbus_eeprom_device_init(uint8_t addr, uint8_t *buf)
+{
+    SMBusEEPROMDevice *eeprom = qemu_mallocz(sizeof(SMBusEEPROMDevice));
+    eeprom->dev.addr = addr;
+    eeprom->dev.quick_cmd = eeprom_quick_cmd;
+    eeprom->dev.send_byte = eeprom_send_byte;
+    eeprom->dev.receive_byte = eeprom_receive_byte;
+    eeprom->dev.write_byte = eeprom_write_byte;
+    eeprom->dev.read_byte = eeprom_read_byte;
+    eeprom->data = buf;
+    eeprom->offset = 0;
+    return (SMBusDevice *) eeprom;
+}