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Subject[PATCH v2 02/05] drivers/fmc: hide fmc operations behind helpers
Date
This gave us more freedom to change/add/remove operations without
recompiling all device driver.

Typically, Carrier board implement the fmc operations, so they will not
use these helpers.

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-chardev.c | 3 +--
drivers/fmc/fmc-core.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/fmc/fmc-match.c | 2 +-
drivers/fmc/fmc-trivial.c | 20 +++++++----------
drivers/fmc/fmc-write-eeprom.c | 8 +++----
include/linux/fmc.h | 18 +++++++++++++++
6 files changed, 87 insertions(+), 19 deletions(-)

diff --git a/drivers/fmc/fmc-chardev.c b/drivers/fmc/fmc-chardev.c
index 38aa7c4..b3eb6a2 100644
--- a/drivers/fmc/fmc-chardev.c
+++ b/drivers/fmc/fmc-chardev.c
@@ -129,8 +129,7 @@ static int fc_probe(struct fmc_device *fmc)

struct fc_instance *fc;

- if (fmc->op->validate)
- index = fmc->op->validate(fmc, &fc_drv);
+ index = fmc_validate(fmc, &fc_drv);
if (index < 0)
return -EINVAL; /* not our device: invalid */

diff --git a/drivers/fmc/fmc-core.c b/drivers/fmc/fmc-core.c
index 0189518..60e568d 100644
--- a/drivers/fmc/fmc-core.c
+++ b/drivers/fmc/fmc-core.c
@@ -118,6 +118,61 @@ static struct bin_attribute fmc_eeprom_attr = {
.write = fmc_write_eeprom,
};

+int fmc_irq_request(struct fmc_device *fmc, irq_handler_t h,
+ char *name, int flags)
+{
+ if (fmc->op->irq_request)
+ return fmc->op->irq_request(fmc, h, name, flags);
+ return -EPERM;
+}
+EXPORT_SYMBOL(fmc_irq_request);
+
+void fmc_irq_free(struct fmc_device *fmc)
+{
+ if (fmc->op->irq_free)
+ fmc->op->irq_free(fmc);
+}
+EXPORT_SYMBOL(fmc_irq_free);
+
+void fmc_irq_ack(struct fmc_device *fmc)
+{
+ if (likely(fmc->op->irq_ack))
+ fmc->op->irq_ack(fmc);
+}
+EXPORT_SYMBOL(fmc_irq_ack);
+
+int fmc_validate(struct fmc_device *fmc, struct fmc_driver *drv)
+{
+ if (fmc->op->validate)
+ return fmc->op->validate(fmc, drv);
+ return -EPERM;
+}
+EXPORT_SYMBOL(fmc_validate);
+
+int fmc_gpio_config(struct fmc_device *fmc, struct fmc_gpio *gpio, int ngpio)
+{
+ if (fmc->op->gpio_config)
+ return fmc->op->gpio_config(fmc, gpio, ngpio);
+ return -EPERM;
+}
+EXPORT_SYMBOL(fmc_gpio_config);
+
+int fmc_read_ee(struct fmc_device *fmc, int pos, void *d, int l)
+{
+ if (fmc->op->read_ee)
+ return fmc->op->read_ee(fmc, pos, d, l);
+ return -EPERM;
+}
+EXPORT_SYMBOL(fmc_read_ee);
+
+int fmc_write_ee(struct fmc_device *fmc, int pos, const void *d, int l)
+{
+ if (fmc->op->write_ee)
+ return fmc->op->write_ee(fmc, pos, d, l);
+ return -EPERM;
+}
+EXPORT_SYMBOL(fmc_write_ee);
+
/*
* Functions for client modules follow
*/
diff --git a/drivers/fmc/fmc-match.c b/drivers/fmc/fmc-match.c
index 104a5ef..a0956d1 100644
--- a/drivers/fmc/fmc-match.c
+++ b/drivers/fmc/fmc-match.c
@@ -63,7 +63,7 @@ int fmc_fill_id_info(struct fmc_device *fmc)
if (!fmc->eeprom)
return -ENOMEM;
allocated = 1;
- ret = fmc->op->read_ee(fmc, 0, fmc->eeprom, fmc->eeprom_len);
+ ret = fmc_read_ee(fmc, 0, fmc->eeprom, fmc->eeprom_len);
if (ret < 0)
goto out;
}
diff --git a/drivers/fmc/fmc-trivial.c b/drivers/fmc/fmc-trivial.c
index d26a174..7c03946 100644
--- a/drivers/fmc/fmc-trivial.c
+++ b/drivers/fmc/fmc-trivial.c
@@ -18,7 +18,7 @@ static irqreturn_t t_handler(int irq, void *dev_id)
{
struct fmc_device *fmc = dev_id;

- fmc->op->irq_ack(fmc);
+ fmc_irq_ack(fmc);
dev_info(&fmc->dev, "received irq %i\n", irq);
return IRQ_HANDLED;
}
@@ -40,25 +40,21 @@ static int t_probe(struct fmc_device *fmc)
int ret;
int index = 0;

- if (fmc->op->validate)
- index = fmc->op->validate(fmc, &t_drv);
+ index = fmc_validate(fmc, &t_drv);
if (index < 0)
return -EINVAL; /* not our device: invalid */

- ret = fmc->op->irq_request(fmc, t_handler, "fmc-trivial", IRQF_SHARED);
+ ret = fmc_irq_request(fmc, t_handler, "fmc-trivial", IRQF_SHARED);
if (ret < 0)
return ret;
/* ignore error code of call below, we really don't care */
- fmc->op->gpio_config(fmc, t_gpio, ARRAY_SIZE(t_gpio));
+ fmc_gpio_config(fmc, t_gpio, ARRAY_SIZE(t_gpio));

- /* Reprogram, if asked to. ESRCH == no filename specified */
- ret = -ESRCH;
- if (fmc->op->reprogram)
- ret = fmc->op->reprogram(fmc, &t_drv, "");
- if (ret == -ESRCH)
+ ret = fmc_reprogram(fmc, &t_drv, "", 0);
+ if (ret == -EPERM) /* programming not supported */
ret = 0;
if (ret < 0)
- fmc->op->irq_free(fmc);
+ fmc_irq_free(fmc);

/* FIXME: reprogram LM32 too */
return ret;
@@ -66,7 +62,7 @@ static int t_probe(struct fmc_device *fmc)

static int t_remove(struct fmc_device *fmc)
{
- fmc->op->irq_free(fmc);
+ fmc_irq_free(fmc);
return 0;
}

diff --git a/drivers/fmc/fmc-write-eeprom.c b/drivers/fmc/fmc-write-eeprom.c
index aa88f02..de1c113 100644
--- a/drivers/fmc/fmc-write-eeprom.c
+++ b/drivers/fmc/fmc-write-eeprom.c
@@ -50,7 +50,7 @@ static int fwe_run_tlv(struct fmc_device *fmc, const struct firmware *fw,
if (write) {
dev_info(&fmc->dev, "write %i bytes at 0x%04x\n",
thislen, thisaddr);
- err = fmc->op->write_ee(fmc, thisaddr, p + 5, thislen);
+ err = fmc_write_ee(fmc, thisaddr, p + 5, thislen);
}
if (err < 0) {
dev_err(&fmc->dev, "write failure @0x%04x\n",
@@ -70,7 +70,7 @@ static int fwe_run_bin(struct fmc_device *fmc, const struct firmware *fw)
int ret;

dev_info(&fmc->dev, "programming %zi bytes\n", fw->size);
- ret = fmc->op->write_ee(fmc, 0, (void *)fw->data, fw->size);
+ ret = fmc_write_ee(fmc, 0, (void *)fw->data, fw->size);
if (ret < 0) {
dev_info(&fmc->dev, "write_eeprom: error %i\n", ret);
return ret;
@@ -115,8 +115,8 @@ int fwe_probe(struct fmc_device *fmc)
KBUILD_MODNAME);
return -ENODEV;
}
- if (fmc->op->validate)
- index = fmc->op->validate(fmc, &fwe_drv);
+
+ index = fmc_validate(fmc, &fwe_drv);
if (index < 0) {
pr_err("%s: refusing device \"%s\"\n", KBUILD_MODNAME,
dev_name(dev));
diff --git a/include/linux/fmc.h b/include/linux/fmc.h
index a5f0aa5..8bb4a15 100644
--- a/include/linux/fmc.h
+++ b/include/linux/fmc.h
@@ -234,4 +234,22 @@ extern void fmc_free_id_info(struct fmc_device *fmc);
extern void fmc_dump_eeprom(const struct fmc_device *fmc);
extern void fmc_dump_sdb(const struct fmc_device *fmc);

+/* helpers for FMC operations */
+extern int fmc_irq_request(struct fmc_device *fmc, irq_handler_t h,
+ char *name, int flags);
+extern void fmc_irq_free(struct fmc_device *fmc);
+extern void fmc_irq_ack(struct fmc_device *fmc);
+extern int fmc_validate(struct fmc_device *fmc, struct fmc_driver *drv);
+extern int fmc_gpio_config(struct fmc_device *fmc, struct fmc_gpio *gpio,
+ int ngpio);
+extern int fmc_read_ee(struct fmc_device *fmc, int pos, void *d, int l);
+extern int fmc_write_ee(struct fmc_device *fmc, int pos, const void *d, int l);
+
+/* helpers for FMC operations */
+extern int fmc_irq_request(struct fmc_device *fmc, irq_handler_t h,
+ char *name, int flags);
+extern void fmc_irq_free(struct fmc_device *fmc);
+extern void fmc_irq_ack(struct fmc_device *fmc);
+extern int fmc_validate(struct fmc_device *fmc, struct fmc_driver *drv);
+
#endif /* __LINUX_FMC_H__ */
--
1.8.3.1
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