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FMC Bus
Commit c32bba5f authored by Alessandro Rubini's avatar Alessandro Rubini
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fmc-write-eeprom: use busid for multi-card environments

parent 8ba6b1be
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Showing with 28 additions and 20 deletions
kernel/fmc-write-eeprom.c
View file @ c32bba5f
......@@ -17,10 +17,17 @@
/*
* This module uses the firmware loader to program the whole or part
* of the FMC eeprom. The meat is in the _run functions. However, no
* default file name is provided, to avoid accidental mishaps.
* default file name is provided, to avoid accidental mishaps. Also,
* you must pass the busid argument
*/
static char *fwe_file;
module_param_named(file, fwe_file, charp, 444);
static struct fmc_driver fwe_drv;
FMC_PARAM_BUSID(fwe_drv);
/* The "file=" is like the generic "gateware=" used elsewhere */
static char *fwe_file[FMC_MAX_CARDS];
static int fwe_file_n;
module_param_array_named(file, fwe_file, charp, &fwe_file_n, 444);
static int fwe_run_tlv(struct fmc_device *fmc, const struct firmware *fw,
int write)
......@@ -72,9 +79,9 @@ static int fwe_run_bin(struct fmc_device *fmc, const struct firmware *fw)
return 0;
}
static int fwe_run(struct fmc_device *fmc, const struct firmware *fw)
static int fwe_run(struct fmc_device *fmc, const struct firmware *fw, char *s)
{
char *last4 = fwe_file + strlen(fwe_file) - 4;
char *last4 = s + strlen(s) - 4;
int err;
if (!strcmp(last4,".bin"))
......@@ -85,41 +92,42 @@ static int fwe_run(struct fmc_device *fmc, const struct firmware *fw)
err = fwe_run_tlv(fmc, fw, 1);
return err;
}
dev_err(fmc->hwdev, "invalid file name \"%s\"\n", fwe_file);
dev_err(fmc->hwdev, "invalid file name \"%s\"\n", s);
return -EINVAL;
}
/*
* Programming is done at probe time. Morever, if more than one FMC
* Programming is done at probe time. Morever, only those listed with
* busid= are programmed.
* card is probed for, only one is programmed. Unfortunately, it's
* difficult to know in advance when probing the first card if others
* are there.
*/
int fwe_probe(struct fmc_device *fmc)
{
int err;
static int done;
int err, index;
const struct firmware *fw;
struct device *dev = fmc->hwdev;
char *s;
if (!fwe_file) {
dev_err(dev, "%s: no filename given: not programming\n",
if (!fwe_drv.busid_n) {
dev_err(dev, "%s: no busid passed, refusing all cards\n",
KBUILD_MODNAME);
return -ENOENT;
return -ENODEV;
}
if (done) {
dev_err(dev, "%s: refusing to program another card\n",
index = fmc->op->validate(fmc, &fwe_drv);
s = fwe_file[index];
if (!s) {
dev_err(dev, "%s: no filename given: not programming\n",
KBUILD_MODNAME);
return -EAGAIN;
return -ENOENT;
}
done++; /* we are starting with this board, don't do any more */
err = request_firmware(&fw, fwe_file, dev);
err = request_firmware(&fw, s, dev);
if (err < 0) {
dev_err(dev, "request firmware \"%s\": error %i\n",
fwe_file, err);
dev_err(dev, "request firmware \"%s\": error %i\n", s, err);
return err;
}
fwe_run(fmc, fw);
fwe_run(fmc, fw, s);
release_firmware(fw);
return 0;
}
......
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