mirror of
https://github.com/edk2-porting/linux-next.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
225 lines
5.9 KiB
C
225 lines
5.9 KiB
C
/* $Id: parport_probe.c,v 1.1 1999/07/03 08:56:17 davem Exp $
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* Parallel port device probing code
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*
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* Authors: Carsten Gross, carsten@sol.wohnheim.uni-ulm.de
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* Philip Blundell <philb@gnu.org>
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*/
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#include <linux/module.h>
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#include <linux/parport.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <asm/uaccess.h>
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static struct {
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char *token;
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char *descr;
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} classes[] = {
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{ "", "Legacy device" },
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{ "PRINTER", "Printer" },
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{ "MODEM", "Modem" },
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{ "NET", "Network device" },
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{ "HDC", "Hard disk" },
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{ "PCMCIA", "PCMCIA" },
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{ "MEDIA", "Multimedia device" },
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{ "FDC", "Floppy disk" },
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{ "PORTS", "Ports" },
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{ "SCANNER", "Scanner" },
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{ "DIGICAM", "Digital camera" },
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{ "", "Unknown device" },
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{ "", "Unspecified" },
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{ "SCSIADAPTER", "SCSI adapter" },
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{ NULL, NULL }
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};
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static void pretty_print(struct parport *port, int device)
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{
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struct parport_device_info *info = &port->probe_info[device + 1];
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printk(KERN_INFO "%s", port->name);
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if (device >= 0)
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printk (" (addr %d)", device);
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printk (": %s", classes[info->class].descr);
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if (info->class)
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printk(", %s %s", info->mfr, info->model);
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printk("\n");
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}
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static char *strdup(char *str)
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{
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int n = strlen(str)+1;
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char *s = kmalloc(n, GFP_KERNEL);
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if (!s) return NULL;
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return strcpy(s, str);
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}
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static void parse_data(struct parport *port, int device, char *str)
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{
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char *txt = kmalloc(strlen(str)+1, GFP_KERNEL);
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char *p = txt, *q;
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int guessed_class = PARPORT_CLASS_UNSPEC;
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struct parport_device_info *info = &port->probe_info[device + 1];
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if (!txt) {
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printk(KERN_WARNING "%s probe: memory squeeze\n", port->name);
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return;
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}
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strcpy(txt, str);
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while (p) {
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char *sep;
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q = strchr(p, ';');
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if (q) *q = 0;
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sep = strchr(p, ':');
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if (sep) {
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char *u;
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*(sep++) = 0;
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/* Get rid of trailing blanks */
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u = sep + strlen (sep) - 1;
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while (u >= p && *u == ' ')
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*u-- = '\0';
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u = p;
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while (*u) {
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*u = toupper(*u);
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u++;
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}
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if (!strcmp(p, "MFG") || !strcmp(p, "MANUFACTURER")) {
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if (info->mfr)
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kfree (info->mfr);
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info->mfr = strdup(sep);
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} else if (!strcmp(p, "MDL") || !strcmp(p, "MODEL")) {
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if (info->model)
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kfree (info->model);
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info->model = strdup(sep);
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} else if (!strcmp(p, "CLS") || !strcmp(p, "CLASS")) {
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int i;
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if (info->class_name)
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kfree (info->class_name);
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info->class_name = strdup(sep);
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for (u = sep; *u; u++)
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*u = toupper(*u);
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for (i = 0; classes[i].token; i++) {
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if (!strcmp(classes[i].token, sep)) {
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info->class = i;
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goto rock_on;
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}
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}
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printk(KERN_WARNING "%s probe: warning, class '%s' not understood.\n", port->name, sep);
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info->class = PARPORT_CLASS_OTHER;
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} else if (!strcmp(p, "CMD") ||
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!strcmp(p, "COMMAND SET")) {
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if (info->cmdset)
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kfree (info->cmdset);
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info->cmdset = strdup(sep);
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/* if it speaks printer language, it's
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probably a printer */
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if (strstr(sep, "PJL") || strstr(sep, "PCL"))
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guessed_class = PARPORT_CLASS_PRINTER;
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} else if (!strcmp(p, "DES") || !strcmp(p, "DESCRIPTION")) {
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if (info->description)
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kfree (info->description);
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info->description = strdup(sep);
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}
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}
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rock_on:
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if (q) p = q+1; else p=NULL;
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}
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/* If the device didn't tell us its class, maybe we have managed to
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guess one from the things it did say. */
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if (info->class == PARPORT_CLASS_UNSPEC)
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info->class = guessed_class;
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pretty_print (port, device);
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kfree(txt);
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}
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/* Get Std 1284 Device ID. */
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ssize_t parport_device_id (int devnum, char *buffer, size_t len)
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{
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ssize_t retval = -ENXIO;
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struct pardevice *dev = parport_open (devnum, "Device ID probe",
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NULL, NULL, NULL, 0, NULL);
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if (!dev)
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return -ENXIO;
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parport_claim_or_block (dev);
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/* Negotiate to compatibility mode, and then to device ID mode.
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* (This is in case we are already in device ID mode.) */
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parport_negotiate (dev->port, IEEE1284_MODE_COMPAT);
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retval = parport_negotiate (dev->port,
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IEEE1284_MODE_NIBBLE | IEEE1284_DEVICEID);
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if (!retval) {
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int idlen;
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unsigned char length[2];
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/* First two bytes are MSB,LSB of inclusive length. */
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retval = parport_read (dev->port, length, 2);
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if (retval != 2) goto end_id;
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idlen = (length[0] << 8) + length[1] - 2;
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/*
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* Check if the caller-allocated buffer is large enough
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* otherwise bail out or there will be an at least off by one.
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*/
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if (idlen + 1 < len)
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len = idlen;
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else {
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retval = -EINVAL;
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goto out;
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}
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retval = parport_read (dev->port, buffer, len);
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if (retval != len)
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printk (KERN_DEBUG "%s: only read %Zd of %Zd ID bytes\n",
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dev->port->name, retval,
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len);
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/* Some printer manufacturers mistakenly believe that
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the length field is supposed to be _exclusive_.
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In addition, there are broken devices out there
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that don't even finish off with a semi-colon. */
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if (buffer[len - 1] != ';') {
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ssize_t diff;
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diff = parport_read (dev->port, buffer + len, 2);
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retval += diff;
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if (diff)
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printk (KERN_DEBUG
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"%s: device reported incorrect "
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"length field (%d, should be %Zd)\n",
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dev->port->name, idlen, retval);
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else {
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/* One semi-colon short of a device ID. */
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buffer[len++] = ';';
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printk (KERN_DEBUG "%s: faking semi-colon\n",
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dev->port->name);
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/* If we get here, I don't think we
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need to worry about the possible
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standard violation of having read
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more than we were told to. The
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device is non-compliant anyhow. */
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}
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}
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end_id:
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buffer[len] = '\0';
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parport_negotiate (dev->port, IEEE1284_MODE_COMPAT);
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}
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if (retval > 2)
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parse_data (dev->port, dev->daisy, buffer);
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out:
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parport_release (dev);
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parport_close (dev);
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return retval;
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}
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