Das U-Boot: Universal Boot Loader

diff --git a/common/devices.c b/common/devices.c
new file mode 100644 (file)
index 0000000..2d0b046
--- /dev/null
+++ b/common/devices.c
@@ -0,0 +1,193 @@
+/*
+ * (C) Copyright 2000
+ * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <stdarg.h>
+#include <malloc.h>
+#include <devices.h>
+#include <i2c.h>
+
+list_t devlist = 0;
+device_t *stdio_devices[] = { NULL, NULL, NULL };
+char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
+
+#ifdef CFG_DEVICE_NULLDEV
+void nulldev_putc(const char c)
+{
+  /* nulldev is empty! */
+}
+
+void nulldev_puts(const char *s)
+{
+  /* nulldev is empty! */
+}
+
+int nulldev_input(void)
+{
+  /* nulldev is empty! */
+  return 0;
+}
+#endif
+
+/**************************************************************************
+ * SYSTEM DRIVERS
+ **************************************************************************
+ */
+
+static void drv_system_init (void)
+{
+       device_t dev;
+
+       memset (&dev, 0, sizeof (dev));
+
+       strcpy (dev.name, "serial");
+       dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+#if CONFIG_SERIAL_SOFTWARE_FIFO
+       dev.putc = serial_buffered_putc;
+       dev.puts = serial_buffered_puts;
+       dev.getc = serial_buffered_getc;
+       dev.tstc = serial_buffered_tstc;
+#else
+       dev.putc = serial_putc;
+       dev.puts = serial_puts;
+       dev.getc = serial_getc;
+       dev.tstc = serial_tstc;
+#endif
+
+       device_register (&dev);
+
+#ifdef CFG_DEVICE_NULLDEV
+       memset (&dev, 0, sizeof (dev));
+
+       strcpy (dev.name, "nulldev");
+       dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+       dev.putc = nulldev_putc;
+       dev.puts = nulldev_puts;
+       dev.getc = nulldev_input;
+       dev.tstc = nulldev_input;
+
+       device_register (&dev);
+#endif
+}
+
+/**************************************************************************
+ * DEVICES
+ **************************************************************************
+ */
+
+int device_register (device_t * dev)
+{
+       ListInsertItem (devlist, dev, LIST_END);
+       return 0;
+}
+
+/* deregister the device "devname".
+ * returns 0 if success, -1 if device is assigned and 1 if devname not found
+ */
+#ifdef CFG_DEVICE_DEREGISTER
+int device_deregister(char *devname)
+{
+       int i,l,dev_index;
+       device_t *dev = NULL;
+       char temp_names[3][8];
+
+       dev_index=-1;
+       for (i=1; i<=ListNumItems(devlist); i++) {
+               dev = ListGetPtrToItem (devlist, i);
+               if(strcmp(dev->name,devname)==0) {
+                       dev_index=i;
+                       break;
+               }
+       }
+       if(dev_index<0) /* device not found */
+               return 0;
+       /* get stdio devices (ListRemoveItem changes the dev list) */
+       for (l=0 ; l< MAX_FILES; l++) {
+               if (stdio_devices[l] == dev) {
+                       /* Device is assigned -> report error */
+                       return -1;
+               }
+               memcpy (&temp_names[l][0],
+                       stdio_devices[l]->name,
+                       sizeof(stdio_devices[l]->name));
+       }
+       ListRemoveItem(devlist,NULL,dev_index);
+       /* reassign Device list */
+       for (i=1; i<=ListNumItems(devlist); i++) {
+               dev = ListGetPtrToItem (devlist, i);
+               for (l=0 ; l< MAX_FILES; l++) {
+                       if(strcmp(dev->name,temp_names[l])==0) {
+                               stdio_devices[l] = dev;
+                       }
+               }
+       }
+       return 0;
+}
+#endif /* CFG_DEVICE_DEREGISTER */
+
+int devices_init (void)
+{
+       DECLARE_GLOBAL_DATA_PTR;
+
+       int i;
+       ulong relocation_offset = gd->reloc_off;
+
+       /* relocate device name pointers */
+       for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
+               stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
+                                               relocation_offset);
+       }
+
+       /* Initialize the list */
+       devlist = ListCreate (sizeof (device_t));
+
+       if (devlist == NULL) {
+               eputs ("Cannot initialize the list of devices!\n");
+               return -1;
+       }
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
+       i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+#endif
+#ifdef CONFIG_LCD
+       drv_lcd_init ();
+#endif
+#ifdef CONFIG_VIDEO
+       drv_video_init ();
+#endif
+#ifdef CONFIG_WL_4PPM_KEYBOARD
+       drv_wlkbd_init ();
+#endif
+       drv_system_init ();
+
+       gd-> flags |= GD_FLG_DEVINIT;   /* device initialization done */
+
+       return (0);
+}
+
+int devices_done (void)
+{
+       ListDispose (devlist);
+
+       return 0;
+}