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Subject[PATCH v2 05/05] drivers/fmc: carrier can program FPGA on registration
Date
The initial FPGA may require programming before it is useful.

From: Federico Vaga <federico.vaga@cern.ch>
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
Tested-by: Pat Riehecky <riehecky@fnal.gov>
---
drivers/fmc/fmc-core.c | 18 +++++++++++++++---
drivers/fmc/fmc-sdb.c | 24 ++++++++++++++++++++++++
include/linux/fmc.h | 4 ++++
3 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/drivers/fmc/fmc-core.c b/drivers/fmc/fmc-core.c
index eabeac0..cec3b8d 100644
--- a/drivers/fmc/fmc-core.c
+++ b/drivers/fmc/fmc-core.c
@@ -280,6 +280,21 @@ int fmc_device_register_n_gw(struct fmc_device **devs, int n,
else
dev_set_name(&fmc->dev, "%s-%04x", fmc->mezzanine_name,
device_id);
+
+ if (gw) {
+ /*
+ * The carrier already know the bitstream to load
+ * for this set of FMC mezzanines.
+ */
+ ret = fmc->op->reprogram_raw(fmc, NULL,
+ gw->bitstream, gw->len);
+ if (ret) {
+ dev_warn(fmc->hwdev,
+ "Invalid gateware for FMC mezzanine\n");
+ goto out;
+ }
+ }
+
ret = device_add(&fmc->dev);
if (ret < 0) {
dev_err(fmc->hwdev, "Slot %i: Failed in registering "
@@ -300,9 +315,6 @@ int fmc_device_register_n_gw(struct fmc_device **devs, int n,
out1:
device_del(&fmc->dev);
out:
- fmc_free_id_info(fmc);
- put_device(&fmc->dev);
-
kfree(devarray);
for (i--; i >= 0; i--) {
fmc_debug_exit(devs[i]);
diff --git a/drivers/fmc/fmc-sdb.c b/drivers/fmc/fmc-sdb.c
index 89e37a6..ffdc176 100644
--- a/drivers/fmc/fmc-sdb.c
+++ b/drivers/fmc/fmc-sdb.c
@@ -127,6 +127,30 @@ int fmc_free_sdb_tree(struct fmc_device *fmc)
EXPORT_SYMBOL(fmc_free_sdb_tree);

/* This helper calls reprogram and inizialized sdb as well */
+int fmc_reprogram_raw(struct fmc_device *fmc, struct fmc_driver *d,
+ void *gw, unsigned long len, int sdb_entry)
+{
+ int ret;
+
+ ret = fmc->op->reprogram_raw(fmc, d, gw, len);
+ if (ret < 0)
+ return ret;
+ if (sdb_entry < 0)
+ return ret;
+
+ /* We are required to find SDB at a given offset */
+ ret = fmc_scan_sdb_tree(fmc, sdb_entry);
+ if (ret < 0) {
+ dev_err(&fmc->dev, "Can't find SDB at address 0x%x\n",
+ sdb_entry);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(fmc_reprogram_raw);
+
+/* This helper calls reprogram and inizialized sdb as well */
int fmc_reprogram(struct fmc_device *fmc, struct fmc_driver *d, char *gw,
int sdb_entry)
{
diff --git a/include/linux/fmc.h b/include/linux/fmc.h
index b6c73d5..3dc8a1b 100644
--- a/include/linux/fmc.h
+++ b/include/linux/fmc.h
@@ -132,6 +132,8 @@ struct fmc_operations {
uint32_t (*read32)(struct fmc_device *fmc, int offset);
void (*write32)(struct fmc_device *fmc, uint32_t value, int offset);
int (*validate)(struct fmc_device *fmc, struct fmc_driver *drv);
+ int (*reprogram_raw)(struct fmc_device *f, struct fmc_driver *d,
+ void *gw, unsigned long len);
int (*reprogram)(struct fmc_device *f, struct fmc_driver *d, char *gw);
int (*irq_request)(struct fmc_device *fmc, irq_handler_t h,
char *name, int flags);
@@ -144,6 +146,8 @@ struct fmc_operations {
};

/* Prefer this helper rather than calling of fmc->reprogram directly */
+int fmc_reprogram_raw(struct fmc_device *fmc, struct fmc_driver *d,
+ void *gw, unsigned long len, int sdb_entry);
extern int fmc_reprogram(struct fmc_device *f, struct fmc_driver *d, char *gw,
int sdb_entry);

--
1.8.3.1
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