161 lines
6.9 KiB
ReStructuredText
161 lines
6.9 KiB
ReStructuredText
==============
|
|
Driver changes
|
|
==============
|
|
|
|
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.
|
|
|
|
* 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 (*remove) (struct pcmcia_device *dev);
|
|
int (*probe) (struct pcmcia_device *dev);
|
|
|
|
* Move suspend, resume and reset out of event handler (as of 2.6.16)::
|
|
|
|
int (*suspend) (struct pcmcia_device *dev);
|
|
int (*resume) (struct pcmcia_device *dev);
|
|
|
|
should be initialized in struct pcmcia_driver, and handle
|
|
(SUSPEND == RESET_PHYSICAL) and (RESUME == CARD_RESET) events
|
|
|
|
* event handler initialization in struct pcmcia_driver (as of 2.6.13)
|
|
The event handler is notified of all events, and must be initialized
|
|
as the event() callback in the driver's struct pcmcia_driver.
|
|
|
|
* pcmcia/version.h should not be used (as of 2.6.13)
|
|
This file will be removed eventually.
|
|
|
|
* in-kernel device<->driver matching (as of 2.6.13)
|
|
PCMCIA devices and their correct drivers can now be matched in
|
|
kernelspace. See 'devicetable.txt' for details.
|
|
|
|
* Device model integration (as of 2.6.11)
|
|
A struct pcmcia_device is registered with the device model core,
|
|
and can be used (e.g. for SET_NETDEV_DEV) by using
|
|
handle_to_dev(client_handle_t * handle).
|
|
|
|
* Convert internal I/O port addresses to unsigned int (as of 2.6.11)
|
|
ioaddr_t should be replaced by unsigned int in PCMCIA card drivers.
|
|
|
|
* irq_mask and irq_list parameters (as of 2.6.11)
|
|
The irq_mask and irq_list parameters should no longer be used in
|
|
PCMCIA card drivers. Instead, it is the job of the PCMCIA core to
|
|
determine which IRQ should be used. Therefore, link->irq.IRQInfo2
|
|
is ignored.
|
|
|
|
* client->PendingEvents is gone (as of 2.6.11)
|
|
client->PendingEvents is no longer available.
|
|
|
|
* client->Attributes are gone (as of 2.6.11)
|
|
client->Attributes is unused, therefore it is removed from all
|
|
PCMCIA card drivers
|
|
|
|
* core functions no longer available (as of 2.6.11)
|
|
The following functions have been removed from the kernel source
|
|
because they are unused by all in-kernel drivers, and no external
|
|
driver was reported to rely on them::
|
|
|
|
pcmcia_get_first_region()
|
|
pcmcia_get_next_region()
|
|
pcmcia_modify_window()
|
|
pcmcia_set_event_mask()
|
|
pcmcia_get_first_window()
|
|
pcmcia_get_next_window()
|
|
|
|
* device list iteration upon module removal (as of 2.6.10)
|
|
It is no longer necessary to iterate on the driver's internal
|
|
client list and call the ->detach() function upon module removal.
|
|
|
|
* Resource management. (as of 2.6.8)
|
|
Although the PCMCIA subsystem will allocate resources for cards,
|
|
it no longer marks these resources busy. This means that driver
|
|
authors are now responsible for claiming your resources as per
|
|
other drivers in Linux. You should use request_region() to mark
|
|
your IO regions in-use, and request_mem_region() to mark your
|
|
memory regions in-use. The name argument should be a pointer to
|
|
your driver name. Eg, for pcnet_cs, name should point to the
|
|
string "pcnet_cs".
|
|
|
|
* CardServices is gone
|
|
CardServices() in 2.4 is just a big switch statement to call various
|
|
services. In 2.6, all of those entry points are exported and called
|
|
directly (except for pcmcia_report_error(), just use cs_error() instead).
|
|
|
|
* struct pcmcia_driver
|
|
You need to use struct pcmcia_driver and pcmcia_{un,}register_driver
|
|
instead of {un,}register_pccard_driver
|