xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pcmcia: add pcmcia_loop_config() helper

Browse Source 
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: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski
2008-07-29 08:38:30 +02:00
parent 6e86841d05
commit a804b574e6
3 changed files with 74 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/pcmcia/pcmcia_resource.c
View File

@@ -909,3 +909,65 @@ void pcmcia_disable_device(struct pcmcia_device *p_dev) {
pcmcia_release_window(p_dev->win);
}
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);