/*
 * Guillaume Cottenceau (gc@mandrakesoft.com)
 *
 * Copyright 2000 MandrakeSoft
 *
 * This software may be freely redistributed under the terms of the GNU
 * public license.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/*
 * Portions from Erik Troan (ewt@redhat.com)
 *
 * Copyright 1996 Red Hat Software 
 *
 */


/*
 * This contains stuff related to probing:
 * (1) any (actually only SCSI, NET, CPQ, USB Controllers) devices (autoprobe for PCI and USB)
 * (2) IDE media
 * (3) SCSI media
 * (4) ETH devices
 */


#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
// #include <sys/socket.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include "stage1.h"

#include "log.h"
#include "frontend.h"
#include "modules.h"
#include "pci-resource/pci-ids.h"
#ifdef ENABLE_USB
#include "usb-resource/usb-ids.h"
#endif

#include "probing.h"


struct media_info {
	char * name;
	char * model;
	enum media_type type;
};


static void warning_insmod_failed(enum insmod_return r)
{
	if (IS_AUTOMATIC && r == INSMOD_FAILED_FILE_NOT_FOUND)
		return;
	if (r != INSMOD_OK) {
		if (r == INSMOD_FAILED_FILE_NOT_FOUND)
			stg1_error_message("This floppy doesn't contain the driver.");
		else
			stg1_error_message("Warning, installation of driver failed. (please include msg from <Alt-F3> for bugreports)");
	}
}

#ifndef DISABLE_NETWORK
struct net_description_elem
{
	char * intf_name;
	char * intf_description;
};
static struct net_description_elem net_descriptions[50];
static int net_descr_number = 0;
static char * intf_descr_for_discover = NULL;
static char * net_intf_too_early_name[50]; /* for modules providing more than one net intf */
static int net_intf_too_early_number = 0;
static int net_intf_too_early_ptr = 0;

void prepare_intf_descr(const char * intf_descr)
{
	intf_descr_for_discover = strdup(intf_descr);
}

void net_discovered_interface(char * intf_name)
{
	if (!intf_descr_for_discover) {
		net_intf_too_early_name[net_intf_too_early_number++] = strdup(intf_name);
		return;
	}
	if (!intf_name) {
		if (net_intf_too_early_ptr >= net_intf_too_early_number) {
			log_message("NET: was expecting another network interface (broken net module?)");
			return;
		}
		net_descriptions[net_descr_number].intf_name = net_intf_too_early_name[net_intf_too_early_ptr++];
	}
	else
		net_descriptions[net_descr_number].intf_name = strdup(intf_name);
	net_descriptions[net_descr_number].intf_description = strdup(intf_descr_for_discover);
	intf_descr_for_discover = NULL;
	net_descr_number++;
}

char * get_net_intf_description(char * intf_name)
{
	int i;
	for (i = 0; i < net_descr_number ; i++)
		if (!strcmp(net_descriptions[i].intf_name, intf_name))
			return net_descriptions[i].intf_description;
	return strdup("unknown");
}
#endif

static void probe_that_type(enum driver_type type)
{
	if (IS_EXPERT) {
		ask_insmod(type);
		return;
	}

	/* ---- PCI probe ---------------------------------------------- */
	{
		FILE * f;
		int n, len = 0;
		char buf[200];
		char devname[22];
		u_int8_t devdata[48];
		struct pci_module_map * pcidb = NULL;
#ifdef ENABLE_USB
		static int need_usb_hcd[HCD_NUM];
#endif

		switch (type) {
#ifndef DISABLE_MEDIAS
		case SCSI_ADAPTERS:
			pcidb = medias_pci_ids;
			len   = medias_num_ids;
			break;
#endif
#ifndef DISABLE_NETWORK
#ifndef DISABLE_PCINET
		case NETWORK_DEVICES:
			pcidb = network_pci_ids;
			len   = network_num_ids;
			break;
#endif
#endif
#ifdef ENABLE_USB
		case USB_CONTROLLERS:
			pcidb = usb_pci_ids;
			len   = usb_num_ids;
			break;
#endif
		default:
			goto end_pci_probe;
		}
		
		if (!(f = fopen("/proc/bus/pci/devices", "rb"))) {
			log_message("PCI: could not open proc file");
			goto end_pci_probe;
		}
		
		log_message("PCI: XXX probing %d XXX", type);

		while (1) {
			int i, j, dfn, vendor, device, class, subv, subid;
			
			if (!fgets(buf, sizeof(buf), f)) break;
		
			sscanf(buf, "%x %x", &dfn, &vendor);
			device = vendor & 0xFFFF; /* because scanf from dietlibc does not support %4f */
			vendor = (vendor >> 16) & 0xFFFF;

			snprintf(devname, sizeof(devname), "/proc/bus/pci/%02x/%02x.%x",
					 dfn >> 8, PCI_SLOT(dfn & 0xff), PCI_FUNC(dfn & 0xff));

			log_message("gathering info for %s", devname);
			
			if ((i = open(devname, O_RDONLY)) != -1) {
				read(i, devdata, sizeof(devdata));
				close(i);
			} else continue;

			class = devdata[9] | (devdata[10] << 8) | (devdata[11] << 16);
			subv = devdata[0x2c] | (devdata[0x2d] << 8);
			subid = devdata[0x2e] | (devdata[0x2f] << 8);
			
			log_message("found pci device: %04x %04x %06x %04x %04x",
						vendor, device, class, subv, subid);
			
			for (i = 0; i < len; i++) {
				if (pcidb[i].vendor == vendor && pcidb[i].device == device) {
					log_message("module is \"%s\" (%s)", pcidb[i].name, pcidb[i].module);
#ifndef DISABLE_MEDIAS
					if (type == SCSI_ADAPTERS) {
						int wait_msg = 0;
						enum insmod_return failed;
						if (IS_AUTOMATIC) {
							wait_message("Loading driver for SCSI adapter:\n \n%s", pcidb[i].name);
							wait_msg = 1;
						} else
							stg1_info_message("About to load driver for SCSI adapter:\n \n%s", pcidb[i].name);
						failed = my_insmod(pcidb[i].module, SCSI_ADAPTERS, NULL);
						if (wait_msg)
							remove_wait_message();
						warning_insmod_failed(failed);
					}
#endif /* DISABLE_MEDIAS */
#ifndef DISABLE_NETWORK
					if (type == NETWORK_DEVICES) {
						stg1_info_message("About to load driver for network device:\n \n%s", pcidb[i].name);
						prepare_intf_descr(pcidb[i].name);
						warning_insmod_failed(my_insmod(pcidb[i].module, NETWORK_DEVICES, NULL));
						if (intf_descr_for_discover) /* for modules providing more than one net intf */
							net_discovered_interface(NULL);
					}
#endif /* DISABLE_NETWORK */
#ifdef ENABLE_USB
					if (type == USB_CONTROLLERS) {
						/* found explicitly declared module */
						for (j=0; j < HCD_NUM; j++) {
							if(ptr_begins_static_str(pcidb[i].module, usb_hcd[j])) {
								log_message("found explicit %s", usb_hcd[j]);
								need_usb_hcd[j] = 1;
								break;
							}
						}
					}
#endif /* ENABLE_USB */
				} /* vendor & device matched */
#ifdef ENABLE_USB
				else {
					/* no module found, trying to identify one by class:
					   HCD:     PCI Class:
					   uhci-hcd 0x000c0300
					   ohci-hcd 0x000c0310
					   ehci-hcd 0x000c0320
					*/
					if (type == USB_CONTROLLERS && (class & 0xffff0f) == 0x0c0300) {
						log_message("found by class %s", usb_hcd[(class & 0xf0)>>4]);
						need_usb_hcd[(class & 0xf0)>>4] = 1;
					}
				}
#endif /* ENABLE_USB */
			} /* end of this vendor & device */
		} /* end of pci device list */
		fclose(f);
		
#ifdef ENABLE_USB
		/* load all usb controller modules now, starting from possible ehci-hcd */
		/* to prevent case when old-timed module sitting on newer host controller */
		if (type == USB_CONTROLLERS) {
			for (n=HCD_NUM-1; n; n--) {
				if (need_usb_hcd[n]) {
					stg1_info_message("About to load driver for usb controller: %s", usb_hcd[n]);
					my_insmod(usb_hcd[n], USB_CONTROLLERS, NULL);
				}
			}
		}
#endif
	end_pci_probe:
	}

#ifdef ENABLE_USB
	/* ---- USB probe ---------------------------------------------- */
	{
		static int already_probed_usb_controllers = 0;
		static int already_mounted_usbdev = 0;

		FILE * f;
		int len = 0;
		char buf[200];
		struct usb_module_map * usbdb = NULL;

		switch (type) {
#ifdef ENABLE_USBNET
		case NETWORK_DEVICES:
			/*
			  usbdb = usbnet_usb_ids;
			  len   = usbnet_usb_num_ids;
			*/
			break;
#endif
		case SCSI_ADAPTERS:
			/*
			  usbdb = usbstorage_usb_ids;
			  len   = usbstorage_usb_num_ids;
			*/
			break;
		default:
			goto end_usb_probe;
		}

		if (!already_probed_usb_controllers) {
			already_probed_usb_controllers = 1;
			probe_that_type(USB_CONTROLLERS);			
		}
		
		if (!already_mounted_usbdev) {
			already_mounted_usbdev = 1;
			if (mount("/proc/bus/usb", "/proc/bus/usb", "usbdevfs", 0, NULL)) {
				log_message("USB: couldn't mount /proc/bus/usb");
				goto end_usb_probe;
			}
			wait_message("Waiting for USB stuff to show up.");
			sleep(2); /* sucking background work */
			remove_wait_message();
		}

		/* dirty hack */
		if (type == SCSI_ADAPTERS) {
			stg1_info_message("About to load driver for usb storage device: usb-storage");
			my_insmod("usb-storage", ANY_DRIVER_TYPE, NULL);
		}

		if (!(f = fopen("/proc/bus/usb/devices", "rb"))) {
			log_message("USB: could not open proc file");
			goto end_usb_probe;
		}

		while (1) {
			int i, vendor, id;

			if (!fgets(buf, sizeof(buf), f)) break;
			
			if (strstr(buf, "Keyboard")) {
				my_insmod("usbkbd", ANY_DRIVER_TYPE, NULL);
				my_insmod("keybdev", ANY_DRIVER_TYPE, NULL);
			}

			if (sscanf(buf, "P:  Vendor=%x ProdID=%x", &vendor, &id) != 2)
				continue;

			for (i = 0; i < len; i++) {
				if (usbdb[i].vendor == vendor && usbdb[i].id == id) {
					log_message("USB: device %04x %04x is \"%s\" (%s)", vendor, id, usbdb[i].name, usbdb[i].module);
#ifdef ENABLE_USBNET
					if (type == NETWORK_DEVICES) {
						stg1_info_message("About to load driver for usb network device:\n \n%s", usbdb[i].name);
						prepare_intf_descr(usbdb[i].name);
						warning_insmod_failed(my_insmod(usbdb[i].module, NETWORK_DEVICES, NULL));
						if (intf_descr_for_discover) /* for modules providing more than one net intf */
							net_discovered_interface(NULL);
					}
#endif
				}
			}
		}
		fclose(f);
	end_usb_probe:
	}
#endif
}


#ifndef DISABLE_MEDIAS
static struct media_info * medias = NULL;

static void find_media(void)
{
	char b[50];
	char buf[5000];
	struct media_info tmp[50];
	int count;
	int fd;

	if (!medias) {
		probe_that_type(SCSI_ADAPTERS);
	}
	else
		free(medias); /* that does not free the strings, by the way */

	/* ----------------------------------------------- */
	log_message("looking for ide media");

	count = 0;
	strcpy(b, "/proc/ide/hd");
	for (b[12] = 'a'; b[12] <= 'h'; b[12]++) {
		int i;
		char ide_disk[] = "disk";
		char ide_cdrom[] = "cdrom";
		char ide_tape[] = "tape";
		char ide_floppy[] = "floppy";
		
		/* first, test if file exists (will tell if attached medium exists) */
		b[13] = '\0';
		if (access(b, R_OK))
			continue;

		tmp[count].name = strdup("hda");
		tmp[count].name[2] = b[12];

		/* media type */
		strcpy(b + 13, "/media");
		fd = open(b, O_RDONLY);
		if (fd == -1) {
			log_message("failed to open %s for reading", b);
			continue;
		}

		i = read(fd, buf, sizeof(buf));
		if (i == -1) {
			log_message("failed to read %s", b);
			continue;
		}
		buf[i] = '\0';
		close(fd);

		if (ptr_begins_static_str(buf, ide_disk))
			tmp[count].type = DISK;
		else if (ptr_begins_static_str(buf, ide_cdrom))
			tmp[count].type = CDROM;
		else if (ptr_begins_static_str(buf, ide_tape))
			tmp[count].type = TAPE;
		else if (ptr_begins_static_str(buf, ide_floppy))
			tmp[count].type = FLOPPY;
		else
			tmp[count].type = UNKNOWN_MEDIA;

		/* media model */
		strcpy(b + 13, "/model");
		fd = open(b, O_RDONLY);
		if (fd == -1) {
			log_message("failed to open %s for reading", b);
			continue;
		}

		i = read(fd, buf, sizeof(buf));
		if (i <= 0) {
			log_message("failed to read %s", b);
			tmp[count].model = strdup("(none)");
		}
		else {
			buf[i-1] = '\0'; /* eat the \n */
			tmp[count].model = strdup(buf);
		}
		close(fd);

		log_message("IDE/%d: %s is a %s", tmp[count].type, tmp[count].name, tmp[count].model);
		count++;
	}


	/* ----------------------------------------------- */
	log_message("looking for scsi media");

	fd = open("/proc/scsi/scsi", O_RDONLY);
	if (fd != -1) {
		enum { SCSI_TOP, SCSI_HOST, SCSI_VENDOR, SCSI_TYPE } state = SCSI_TOP;
		char * start, * chptr, * next, * end;
		char scsi_disk_count = 'a';
		char scsi_cdrom_count = '0';
		char scsi_tape_count = '0';

		char scsi_no_devices[] = "Attached devices: none";
		char scsi_some_devices[] = "Attached devices: ";
		char scsi_host[] = "Host: ";
		char scsi_vendor[] = "  Vendor: ";

		int i = read(fd, &buf, sizeof(buf)-1);
		if (i < 1) {
			close(fd);
			goto end_scsi;
		}
		close(fd);
		buf[i] = '\0';

		if (ptr_begins_static_str(buf, scsi_no_devices))
			goto end_scsi;
		
		start = buf;
		while (*start) {
			char tmp_model[50];
			char tmp_name[10];

			chptr = start;
			while (*chptr != '\n') chptr++;
			*chptr = '\0';
			next = chptr + 1;
			
			switch (state) {
			case SCSI_TOP:
				if (!ptr_begins_static_str(start, scsi_some_devices))
					goto end_scsi;
				state = SCSI_HOST;
				break;

			case SCSI_HOST:
				if (!ptr_begins_static_str(start, scsi_host))
					goto end_scsi;
				state = SCSI_VENDOR;
				break;

			case SCSI_VENDOR:
				if (!ptr_begins_static_str(start, scsi_vendor))
					goto end_scsi;

				/* (1) Grab Vendor info */
				start += 10;
				end = chptr = strstr(start, "Model:");
				if (!chptr)
					goto end_scsi;

				chptr--;
				while (*chptr == ' ')
					chptr--;
				if (*chptr == ':') {
					chptr++;
					*(chptr + 1) = '\0';
					strcpy(tmp_model,"(unknown)");
				} else {
					*(chptr + 1) = '\0';
					strcpy(tmp_model, start);
				}

				/* (2) Grab Model info */
				start = end;
				start += 7;
				
				chptr = strstr(start, "Rev:");
				if (!chptr)
					goto end_scsi;
				
				chptr--;
				while (*chptr == ' ') chptr--;
				*(chptr + 1) = '\0';
				
				strcat(tmp_model, " ");
				strcat(tmp_model, start);

				tmp[count].model = strdup(tmp_model);
				
				state = SCSI_TYPE;

				break;

			case SCSI_TYPE:
				if (strncmp("  Type:", start, 7))
					goto end_scsi;
				*tmp_name = '\0';

				if (strstr(start, "Direct-Access")) {
					sprintf(tmp_name, "sd%c", scsi_disk_count++);
					tmp[count].type = DISK;
				} else if (strstr(start, "Sequential-Access")) {
					sprintf(tmp_name, "st%c", scsi_tape_count++);
					tmp[count].type = TAPE;
				} else if (strstr(start, "CD-ROM")) {
					sprintf(tmp_name, "sr%c", scsi_cdrom_count++);
					tmp[count].type = CDROM;
				}

				if (*tmp_name) {
					tmp[count].name = strdup(tmp_name);
					log_message("SCSI/%d: %s is a %s", tmp[count].type, tmp[count].name, tmp[count].model);
					count++;
				}
				
				state = SCSI_HOST;
			}
			
			start = next;
		}
		
	end_scsi:
	}

	/* ----------------------------------------------- */
	log_message("looking for Compaq Smart Array media");
	{
		char * procfiles[] = { "/proc/driver/cpqarray/ida0", "/proc/driver/cciss/cciss0", // 2.4 style
				       "/proc/array/ida", "/proc/cciss/cciss",                 // 2.2 style
				       NULL };
		static char cpq_descr[] = "Compaq RAID logical disk";
		char ** procfile = procfiles;
		FILE * f;
		while (procfile && *procfile && (f = fopen(*procfile, "rb"))) {
			while (fgets(buf, sizeof(buf), f)) {
				if (ptr_begins_static_str(buf, "ida/") || ptr_begins_static_str(buf, "cciss/")) {
					char * end = strchr(buf, ':');
					if (!end)
						log_message("Inconsistency in %s, line:\n%s", *procfile, buf);
					else {
						*end = '\0';
						tmp[count].name = strdup(buf);
						tmp[count].type = DISK;
						tmp[count].model = cpq_descr;
						log_message("CPQ: found %s", tmp[count].name);
						count++;
					}
				}
			}
			fclose(f);
			procfile++;
		}
	}

	/* ----------------------------------------------- */
	log_message("looking for DAC960");
	{
		FILE * f;
		if ((f = fopen("/tmp/syslog", "rb"))) {
			while (fgets(buf, sizeof(buf), f)) {
				char * start;
				if ((start = strstr(buf, "/dev/rd/"))) {
					char * end = strchr(start, ':');
					if (!end)
						log_message("Inconsistency in syslog, line:\n%s", buf);
					else {
						*end = '\0';
						tmp[count].name = strdup(start+5);
						tmp[count].type = DISK;
						start = end + 2;
						end = strchr(start, ',');
						if (end) {
							*end = '\0';
							tmp[count].model = strdup(start);
						} else
							tmp[count].model = "(unknown)";
						log_message("DAC960: found %s (%s)", tmp[count].name, tmp[count].model);
						count++;
					}
				}
			}
			fclose(f);
		}
	}

	/* ----------------------------------------------- */
	tmp[count].name = NULL;
	count++;

	medias = memdup(tmp, sizeof(struct media_info) * count);
}


/* Finds by media */
void get_medias(enum media_type media, char *** names, char *** models)
{
	struct media_info * m;
	char * tmp_names[50];
	char * tmp_models[50];
	int count;

	find_media();

	m = medias;

	count = 0;
	while (m && m->name) {
		if (m->type == media) {
			tmp_names[count] = strdup(m->name);
			tmp_models[count++] = strdup(m->model);
		}
		m++;
	}
	tmp_names[count] = NULL;
	tmp_models[count++] = NULL;

	*names = memdup(tmp_names, sizeof(char *) * count);
	*models = memdup(tmp_models, sizeof(char *) * count);
}
#endif /* DISABLE_MEDIAS */


#ifndef DISABLE_NETWORK
int net_device_available(char * device)
{
	struct ifreq req;
	int s;
    
	s = socket(AF_INET, SOCK_DGRAM, 0);
	if (s < 0) {
		log_perror(device);
		return 0;
	}
	strcpy(req.ifr_name, device);
	if (ioctl(s, SIOCGIFFLAGS, &req)) {
		/* if we can't get the flags, the networking device isn't available */
		close(s);
		return 0;
	}
	close(s);
	return 1;
}


char ** get_net_devices(void)
{
	char * devices[] = {
		"eth0", "eth1", "eth2", "eth3", "eth4", "eth5",
		"tr0",
		"plip0", "plip1", "plip2",
		"fddi0",
#ifdef ENABLE_USBNET
		"usb0", "usb1", "usb2", "usb3",
#endif
		NULL
	};
	char ** ptr = devices;
	char * tmp[50];
	int i = 0;
	static int already_probed = 0;

	if (!already_probed) {
		already_probed = 1; /* cut off loop brought by: probe_that_type => my_insmod => get_net_devices */
		probe_that_type(NETWORK_DEVICES);
	}

	while (ptr && *ptr) {
		if (net_device_available(*ptr))
			tmp[i++] = strdup(*ptr);
		ptr++;
	}
	tmp[i++] = NULL;

	return memdup(tmp, sizeof(char *) * i);
}
#endif /* DISABLE_NETWORK */