- 根目录:
- Documentation
- pcmcia
- driver-changes.txt
This file details changes in 2.6 which affect PCMCIA card driver authors:
* pcmcia_loop_config() and autoconfiguration (as of 2.6.36)
If struct pcmcia_device *p_dev->config_flags is set accordingly,
pcmcia_loop_config() now sets up certain configuration values
automatically, though the driver may still override the settings
in the callback function. The following autoconfiguration options
are provided at the moment:
CONF_AUTO_CHECK_VCC : check for matching Vcc
CONF_AUTO_SET_VPP : set Vpp
CONF_AUTO_AUDIO : auto-enable audio line, if required
CONF_AUTO_SET_IO : set ioport resources (->resource[0,1])
CONF_AUTO_SET_IOMEM : set first iomem resource (->resource[2])
* pcmcia_request_configuration -> pcmcia_enable_device (as of 2.6.36)
pcmcia_request_configuration() got renamed to pcmcia_enable_device(),
as it mirrors pcmcia_disable_device(). Configuration settings are now
stored in struct pcmcia_device, e.g. in the fields config_flags,
config_index, config_base, vpp.
* pcmcia_request_window changes (as of 2.6.36)
Instead of win_req_t, drivers are now requested to fill out
struct pcmcia_device *p_dev->resource[2,3,4,5] for up to four ioport
ranges. After a call to pcmcia_request_window(), the regions found there
are reserved and may be used immediately -- until pcmcia_release_window()
is called.
* pcmcia_request_io changes (as of 2.6.36)
Instead of io_req_t, drivers are now requested to fill out
struct pcmcia_device *p_dev->resource[0,1] for up to two ioport
ranges. After a call to pcmcia_request_io(), the ports found there
are reserved, after calling pcmcia_request_configuration(), they may
be used.
* No dev_info_t, no cs_types.h (as of 2.6.36)
dev_info_t and a few other typedefs are removed. No longer use them
in PCMCIA device drivers. Also, do not include pcmcia/cs_types.h, as
this file is gone.
* No dev_node_t (as of 2.6.35)
There is no more need to fill out a "dev_node_t" structure.
* New IRQ request rules (as of 2.6.35)
Instead of the old pcmcia_request_irq() interface, drivers may now
choose between:
- calling request_irq/free_irq directly. Use the IRQ from *p_dev->irq.
- use pcmcia_request_irq(p_dev, handler_t); the PCMCIA core will
clean up automatically on calls to pcmcia_disable_device() or
device ejection.
- drivers still not capable of IRQF_SHARED (or not telling us so) may
use the deprecated pcmcia_request_exclusive_irq() for the time
being; they might receive a shared IRQ nonetheless.
* no cs_error / CS_CHECK / CONFIG_PCMCIA_DEBUG (as of 2.6.33)
Instead of the cs_error() callback or the CS_CHECK() macro, please use
Linux-style checking of return values, and -- if necessary -- debug
messages using "dev_dbg()" or "pr_debug()".
* New CIS tuple access (as of 2.6.33)
Instead of pcmcia_get_{first,next}_tuple(), pcmcia_get_tuple_data() and
pcmcia_parse_tuple(), a driver shall use "pcmcia_get_tuple()" if it is
only interested in one (raw) tuple, or "pcmcia_loop_tuple()" if it is
interested in all tuples of one type. To decode the MAC from CISTPL_FUNCE,
a new helper "pcmcia_get_mac_from_cis()" was added.
* 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)
Instead of calling pcmcia_release_{configuration,io,irq,win}, all that's
necessary now is calling pcmcia_disable_device. As there is no valid
reason left to call pcmcia_release_io and pcmcia_release_irq, the
exports for them were removed.
* Unify detach and REMOVAL event code, as well as attach and INSERTION
code (as of 2.6.16)
void
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