466 lines
11 KiB
C
466 lines
11 KiB
C
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#include <common.h>
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#include <command.h>
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#include <driver.h>
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#include <linux/ctype.h>
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int cmd_get_data_size(char* arg, int default_size)
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{
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/* Check for a size specification .b, .w or .l.
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*/
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int len = strlen(arg);
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if (len > 2 && arg[len-2] == '.') {
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switch(arg[len-1]) {
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case 'b':
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return 1;
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case 'w':
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return 2;
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case 'l':
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return 4;
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case 's':
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return -2;
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default:
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return -1;
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}
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}
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return default_size;
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}
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static ulong device_handler[MAX_DEVICE_TYPE];
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int register_device_type_handler(int(*handler)(struct device_d *), ulong device_type)
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{
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device_handler[device_type] = (ulong)handler;
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/* FIXME: cycle through devices */
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return 0;
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}
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static struct device_d *first_device = NULL;
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static struct driver_d *first_driver = NULL;
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struct device_d *get_device_by_id(char *id)
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{
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struct device_d *d;
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d = first_device;
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while(d) {
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if(!strcmp(id, d->id))
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break;
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d = d->next;
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}
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return d;
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}
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static int match(struct driver_d *drv, struct device_d *dev)
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{
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int(*handler)(struct device_d *);
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if (strcmp(dev->name, drv->name))
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return -1;
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if (dev->type != drv->type)
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return -1;
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if(drv->probe(dev))
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return -1;
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dev->driver = drv;
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handler = device_handler[dev->type];
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if(handler)
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(*handler)(dev);
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return 0;
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}
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int register_device(struct device_d *new_device)
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{
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struct driver_d *drv;
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struct device_d *dev;
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dev = first_device;
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// printf("register_device: %s\n",new_device->name);
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if(!dev) {
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first_device = new_device;
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} else {
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while(dev->next)
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dev = dev->next;
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}
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dev->next = new_device;
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new_device->next = 0;
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drv = first_driver;
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while(drv) {
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if (!match(drv, new_device))
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break;
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drv = drv->next;
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}
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return 0;
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}
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void unregister_device(struct device_d *old_dev)
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{
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struct device_d *dev;
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// printf("unregister_device: %s\n",old_dev->name);
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dev = first_device;
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while (dev) {
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if (!strcmp(dev->next->name, old_dev->name)) {
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dev->next = old_dev->next;
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return;
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}
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dev = dev->next;
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}
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}
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struct driver_d *get_driver_by_name(char *name)
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{
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struct driver_d *d;
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d = first_driver;
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while(d) {
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if(!strcmp(name, d->name))
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break;
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d = d->next;
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}
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return d;
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}
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static void noinfo(struct device_d *dev)
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{
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printf("no info available for %s\n", dev->id);
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}
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static void noshortinfo(struct device_d *dev)
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{
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}
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int register_driver(struct driver_d *new_driver)
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{
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struct driver_d *drv;
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struct device_d *dev = NULL;
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drv = first_driver;
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// printf("register_driver: %s\n",new_driver->name);
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if(!drv) {
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first_driver = new_driver;
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} else {
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while(drv->next)
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drv = drv->next;
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}
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drv->next = new_driver;
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new_driver->next = 0;
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if (!new_driver->info)
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new_driver->info = noinfo;
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if (!new_driver->shortinfo)
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new_driver->shortinfo = noshortinfo;
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dev = first_device;
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while (dev) {
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match(new_driver, dev);
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dev = dev->next;
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}
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return 0;
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}
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static char devicename_from_spec_str_buf[MAX_DRIVER_NAME];
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char *deviceid_from_spec_str(const char *str, char **endp)
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{
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char *buf = devicename_from_spec_str_buf;
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const char *end;
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int i = 0;
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if (isdigit(*str)) {
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/* No device name given, use default driver mem */
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sprintf(buf, "mem");
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end = str;
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} else {
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/* OK, we have a device name, parse it */
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while (*str) {
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if (*str == ':') {
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str++;
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buf[i] = 0;
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break;
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}
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buf[i++] = *str++;
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buf[i] = 0;
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if (i == MAX_DRIVER_NAME)
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return NULL;
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}
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end = str;
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}
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if (endp)
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*endp = (char *)end;
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return buf;
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}
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/* Get a device struct from the beginning of the string. Default to mem if no
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* device is given, return NULL if a unknown device is given.
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* If endp is not NULL, this function stores a pointer to the first character
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* after the device name in *endp.
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*/
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struct device_d *device_from_spec_str(const char *str, char **endp)
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{
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char *name;
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name = deviceid_from_spec_str(str, endp);
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return get_device_by_id(name);
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}
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unsigned long strtoul_suffix(const char *str, char **endp, int base)
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{
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unsigned long val;
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char *end;
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val = simple_strtoul(str, &end, base);
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switch (*end) {
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case 'G':
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val *= 1024;
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case 'M':
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val *= 1024;
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case 'k':
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case 'K':
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val *= 1024;
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end++;
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}
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if (endp)
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*endp = (char *)end;
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return val;
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}
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/*
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* Parse a string representing a memory area and fill in a struct memarea_info.
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*/
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int spec_str_to_info(const char *str, struct memarea_info *info)
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{
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char *endp;
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memset(info, 0, sizeof(struct memarea_info));
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info->device = device_from_spec_str(str, &endp);
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if (!info->device) {
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printf("unknown device: %s\n", deviceid_from_spec_str(str, NULL));
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return 1;
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}
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str = endp;
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if (!*str) {
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/* no area specification given, use whole device */
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info->size = info->device->size;
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info->end = info->size - 1;
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goto out;
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}
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if (*str == '+') {
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/* no beginning given but size so start is 0 */
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info->size = strtoul_suffix(str + 1, &endp, 0);
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info->end = info->size - 1;
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info->flags = MEMAREA_SIZE_SPECIFIED;
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goto out;
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}
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if (*str == '-') {
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/* no beginning given but end, so start is 0 */
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info->end = strtoul_suffix(str + 1, &endp, 0);
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info->size = info->end + 1;
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info->flags = MEMAREA_SIZE_SPECIFIED;
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goto out;
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}
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str = endp;
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info->start = strtoul_suffix(str, &endp, 0);
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str = endp;
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if (info->start >= info->device->size) {
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printf("Start address is beyond device\n");
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return -1;
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}
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if (!*str) {
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/* beginning given, but no size, pad to the and of the device */
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info->end = info->device->size - 1;
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info->size = info->end - info->start + 1;
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goto out;
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}
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if (*str == '-') {
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/* beginning and end given */
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info->end = strtoul_suffix(str + 1, NULL, 0);
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info->size = info->end - info->start + 1;
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if (info->end < info->start) {
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printf("end < start\n");
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return -1;
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}
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info->flags = MEMAREA_SIZE_SPECIFIED;
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goto out;
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}
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if (*str == '+') {
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/* beginning and size given */
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info->size = strtoul_suffix(str + 1, NULL, 0);
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info->end = info->start + info->size - 1;
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info->flags = MEMAREA_SIZE_SPECIFIED;
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goto out;
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}
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out:
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/* check for device boundaries */
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if (info->end > info->device->size) {
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info->end = info->device->size - 1;
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info->size = info->end - info->start + 1;
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}
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#if 0
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printf("start: 0x%08x\n",info->start);
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printf("size: 0x%08x\n",info->size);
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printf("end: 0x%08x\n",info->end);
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#endif
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return 0;
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}
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ssize_t read(struct device_d *dev, void *buf, size_t count, unsigned long offset, ulong flags)
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{
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if (dev->driver->read)
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return dev->driver->read(dev, buf, count, offset, flags);
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return -1;
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}
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ssize_t write(struct device_d *dev, void *buf, size_t count, unsigned long offset, ulong flags)
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{
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if (dev->driver->write)
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return dev->driver->write(dev, buf, count, offset, flags);
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return -1;
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}
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ssize_t erase(struct device_d *dev, size_t count, unsigned long offset)
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{
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if (dev->driver->erase)
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return dev->driver->erase(dev, count, offset);
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return -1;
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}
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int dummy_probe(struct device_d *dev)
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{
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return 0;
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}
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static struct param_d *get_param_by_name(struct device_d *dev, char *name)
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{
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struct param_d *param = dev->param;
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while (param) {
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if (!strcmp(param->name, name))
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return param;
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param = param->next;
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}
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return NULL;
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}
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char *dev_get_param(struct device_d *dev, char *name)
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{
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struct param_d *param = get_param_by_name(dev, name);
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if (param && param->get)
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return param->get(dev, param->cookie);
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return NULL;
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}
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int dev_set_param(struct device_d *dev, char *name, char *val)
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{
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struct param_d *param = get_param_by_name(dev, name);
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if (param && param->set)
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return param->set(dev, param->cookie, val);
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return -1;
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}
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int dev_add_parameter(struct device_d *dev, struct param_d *newparam)
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{
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struct param_d *param = dev->param;
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newparam->next = 0;
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if (param) {
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while (param->next)
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param = param->next;
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param->next = newparam;
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} else {
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dev->param = newparam;
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}
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return 0;
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}
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int do_devinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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struct device_d *dev = first_device;
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struct driver_d *drv = first_driver;
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struct param_d *param;
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if (argc == 1) {
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printf("devices:\n");
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while(dev) {
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printf("%10s: base=0x%08x size=0x%08x (driver %s)\n",dev->id, dev->map_base, dev->size, dev->name);
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dev = dev->next;
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}
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printf("drivers:\n");
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while(drv) {
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printf("%10s\n",drv->name);
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drv = drv->next;
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}
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} else {
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struct device_d *dev = get_device_by_id(argv[1]);
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if (!dev) {
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printf("no such device: %s\n",argv[1]);
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return -1;
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}
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dev->driver->info(dev);
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param = dev->param;
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printf("%s\n", param ? "Parameters:" : "no parameters available");
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while (param) {
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printf("%16s = %s\n", param->name, param->get(dev, param->cookie));
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param = param->next;
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}
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}
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return 0;
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}
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U_BOOT_CMD(
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devinfo, 2, 0, do_devinfo,
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"devinfo - display info about devices and drivers\n",
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""
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);
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