Commit a804b574 authored by Dominik Brodowski's avatar Dominik Brodowski

pcmcia: add pcmcia_loop_config() helper

By calling pcmcia_loop_config(), a pcmcia driver can iterate over all
available configuration options. During a driver's probe() phase, one
doesn't need to use pcmcia_get_{first,next}_tuple, pcmcia_get_tuple_data
and pcmcia_parse_tuple directly in most if not all cases.
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 6e86841d
This file details changes in 2.6 which affect PCMCIA card driver authors: This file details changes in 2.6 which affect PCMCIA card driver authors:
* New configuration loop helper (as of 2.6.28)
By calling pcmcia_loop_config(), a driver can iterate over all available
configuration options. During a driver's probe() phase, one doesn't need
to use pcmcia_get_{first,next}_tuple, pcmcia_get_tuple_data and
pcmcia_parse_tuple directly in most if not all cases.
* New release helper (as of 2.6.17) * New release helper (as of 2.6.17)
Instead of calling pcmcia_release_{configuration,io,irq,win}, all that's Instead of calling pcmcia_release_{configuration,io,irq,win}, all that's
necessary now is calling pcmcia_disable_device. As there is no valid necessary now is calling pcmcia_disable_device. As there is no valid
......
...@@ -909,3 +909,65 @@ void pcmcia_disable_device(struct pcmcia_device *p_dev) { ...@@ -909,3 +909,65 @@ void pcmcia_disable_device(struct pcmcia_device *p_dev) {
pcmcia_release_window(p_dev->win); pcmcia_release_window(p_dev->win);
} }
EXPORT_SYMBOL(pcmcia_disable_device); EXPORT_SYMBOL(pcmcia_disable_device);
struct pcmcia_cfg_mem {
tuple_t tuple;
cisparse_t parse;
u8 buf[256];
};
/**
* pcmcia_loop_config() - loop over configuration options
* @p_dev: the struct pcmcia_device which we need to loop for.
* @conf_check: function to call for each configuration option.
* It gets passed the struct pcmcia_device, the CIS data
* describing the configuration option, and private data
* being passed to pcmcia_loop_config()
* @priv_data: private data to be passed to the conf_check function.
*
* pcmcia_loop_config() loops over all configuration options, and calls
* the driver-specific conf_check() for each one, checking whether
* it is a valid one.
*/
int pcmcia_loop_config(struct pcmcia_device *p_dev,
int (*conf_check) (struct pcmcia_device *p_dev,
cistpl_cftable_entry_t *cfg,
void *priv_data),
void *priv_data)
{
struct pcmcia_cfg_mem *cfg_mem;
tuple_t *tuple;
int ret = -ENODEV;
cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
if (cfg_mem == NULL)
return -ENOMEM;
tuple = &cfg_mem->tuple;
tuple->TupleData = cfg_mem->buf;
tuple->TupleDataMax = 255;
tuple->TupleOffset = 0;
tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY;
tuple->Attributes = 0;
ret = pcmcia_get_first_tuple(p_dev, tuple);
while (!ret) {
if (pcmcia_get_tuple_data(p_dev, tuple))
goto next_entry;
if (pcmcia_parse_tuple(p_dev, tuple, &cfg_mem->parse))
goto next_entry;
ret = conf_check(p_dev, &cfg_mem->parse.cftable_entry,
priv_data);
if (!ret)
break;
next_entry:
ret = pcmcia_get_next_tuple(p_dev, tuple);
}
return ret;
}
EXPORT_SYMBOL(pcmcia_loop_config);
...@@ -613,4 +613,10 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, unsigned ...@@ -613,4 +613,10 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, unsigned
#define pcmcia_validate_cis(p_dev, info) \ #define pcmcia_validate_cis(p_dev, info) \
pccard_validate_cis(p_dev->socket, p_dev->func, info) pccard_validate_cis(p_dev->socket, p_dev->func, info)
int pcmcia_loop_config(struct pcmcia_device *p_dev,
int (*conf_check) (struct pcmcia_device *p_dev,
cistpl_cftable_entry_t *cf,
void *priv_data),
void *priv_data);
#endif /* LINUX_CISTPL_H */ #endif /* LINUX_CISTPL_H */
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