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drivers/fmc: hide fmc operations behind helpers

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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.

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
Tested-by: Pat Riehecky <riehecky@fnal.gov>
Acked-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Federico Vaga 2017-07-18 08:32:53 +02:00 committed by Greg Kroah-Hartman
parent 8e12381bd7
commit 9f757f4152
6 changed files with 87 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/fmc/fmc-chardev.c
View File

@ -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 */

55
drivers/fmc/fmc-core.c
View File

@ -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
*/

2
drivers/fmc/fmc-match.c
View File

@ -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;
}

20
drivers/fmc/fmc-trivial.c
View File

@ -24,7 +24,7 @@ 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;
}
@ -46,25 +46,21 @@ 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;
@ -72,7 +68,7 @@ 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;
}

8
drivers/fmc/fmc-write-eeprom.c
View File

@ -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 @@ static 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));

18
include/linux/fmc.h
View File

@ -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__ */