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3bdab16c MCC |
1 | ============== |
2 | Driver changes | |
3 | ============== | |
4 | ||
5085cb26 | 5 | This file details changes in 2.6 which affect PCMCIA card driver authors: |
3bdab16c | 6 | |
00990e7c | 7 | * pcmcia_loop_config() and autoconfiguration (as of 2.6.36) |
3bdab16c | 8 | If `struct pcmcia_device *p_dev->config_flags` is set accordingly, |
00990e7c DB |
9 | pcmcia_loop_config() now sets up certain configuration values |
10 | automatically, though the driver may still override the settings | |
11 | in the callback function. The following autoconfiguration options | |
12 | are provided at the moment: | |
3bdab16c MCC |
13 | |
14 | - CONF_AUTO_CHECK_VCC : check for matching Vcc | |
15 | - CONF_AUTO_SET_VPP : set Vpp | |
16 | - CONF_AUTO_AUDIO : auto-enable audio line, if required | |
17 | - CONF_AUTO_SET_IO : set ioport resources (->resource[0,1]) | |
18 | - CONF_AUTO_SET_IOMEM : set first iomem resource (->resource[2]) | |
00990e7c | 19 | |
1ac71e5a DB |
20 | * pcmcia_request_configuration -> pcmcia_enable_device (as of 2.6.36) |
21 | pcmcia_request_configuration() got renamed to pcmcia_enable_device(), | |
22 | as it mirrors pcmcia_disable_device(). Configuration settings are now | |
23 | stored in struct pcmcia_device, e.g. in the fields config_flags, | |
24 | config_index, config_base, vpp. | |
25 | ||
cdb13808 DB |
26 | * pcmcia_request_window changes (as of 2.6.36) |
27 | Instead of win_req_t, drivers are now requested to fill out | |
3bdab16c | 28 | `struct pcmcia_device *p_dev->resource[2,3,4,5]` for up to four ioport |
cdb13808 DB |
29 | ranges. After a call to pcmcia_request_window(), the regions found there |
30 | are reserved and may be used immediately -- until pcmcia_release_window() | |
31 | is called. | |
32 | ||
90abdc3b DB |
33 | * pcmcia_request_io changes (as of 2.6.36) |
34 | Instead of io_req_t, drivers are now requested to fill out | |
3bdab16c | 35 | `struct pcmcia_device *p_dev->resource[0,1]` for up to two ioport |
90abdc3b DB |
36 | ranges. After a call to pcmcia_request_io(), the ports found there |
37 | are reserved, after calling pcmcia_request_configuration(), they may | |
38 | be used. | |
39 | ||
ac8b4228 DB |
40 | * No dev_info_t, no cs_types.h (as of 2.6.36) |
41 | dev_info_t and a few other typedefs are removed. No longer use them | |
42 | in PCMCIA device drivers. Also, do not include pcmcia/cs_types.h, as | |
43 | this file is gone. | |
44 | ||
b9300aa7 DB |
45 | * No dev_node_t (as of 2.6.35) |
46 | There is no more need to fill out a "dev_node_t" structure. | |
47 | ||
eb14120f DB |
48 | * New IRQ request rules (as of 2.6.35) |
49 | Instead of the old pcmcia_request_irq() interface, drivers may now | |
50 | choose between: | |
3bdab16c MCC |
51 | |
52 | - calling request_irq/free_irq directly. Use the IRQ from `*p_dev->irq`. | |
eb14120f DB |
53 | - use pcmcia_request_irq(p_dev, handler_t); the PCMCIA core will |
54 | clean up automatically on calls to pcmcia_disable_device() or | |
55 | device ejection. | |
5085cb26 | 56 | |
9cb495bb DB |
57 | * no cs_error / CS_CHECK / CONFIG_PCMCIA_DEBUG (as of 2.6.33) |
58 | Instead of the cs_error() callback or the CS_CHECK() macro, please use | |
59 | Linux-style checking of return values, and -- if necessary -- debug | |
60 | messages using "dev_dbg()" or "pr_debug()". | |
61 | ||
91284224 DB |
62 | * New CIS tuple access (as of 2.6.33) |
63 | Instead of pcmcia_get_{first,next}_tuple(), pcmcia_get_tuple_data() and | |
64 | pcmcia_parse_tuple(), a driver shall use "pcmcia_get_tuple()" if it is | |
65 | only interested in one (raw) tuple, or "pcmcia_loop_tuple()" if it is | |
66 | interested in all tuples of one type. To decode the MAC from CISTPL_FUNCE, | |
67 | a new helper "pcmcia_get_mac_from_cis()" was added. | |
68 | ||
a804b574 DB |
69 | * New configuration loop helper (as of 2.6.28) |
70 | By calling pcmcia_loop_config(), a driver can iterate over all available | |
71 | configuration options. During a driver's probe() phase, one doesn't need | |
72 | to use pcmcia_get_{first,next}_tuple, pcmcia_get_tuple_data and | |
73 | pcmcia_parse_tuple directly in most if not all cases. | |
74 | ||
5f2a71fc DB |
75 | * New release helper (as of 2.6.17) |
76 | Instead of calling pcmcia_release_{configuration,io,irq,win}, all that's | |
77 | necessary now is calling pcmcia_disable_device. As there is no valid | |
50db3fdb DB |
78 | reason left to call pcmcia_release_io and pcmcia_release_irq, the |
79 | exports for them were removed. | |
5f2a71fc | 80 | |
f8cfa618 | 81 | * Unify detach and REMOVAL event code, as well as attach and INSERTION |
3bdab16c MCC |
82 | code (as of 2.6.16):: |
83 | ||
f8cfa618 DB |
84 | void (*remove) (struct pcmcia_device *dev); |
85 | int (*probe) (struct pcmcia_device *dev); | |
cc3b4866 | 86 | |
3bdab16c MCC |
87 | * Move suspend, resume and reset out of event handler (as of 2.6.16):: |
88 | ||
98e4c28b DB |
89 | int (*suspend) (struct pcmcia_device *dev); |
90 | int (*resume) (struct pcmcia_device *dev); | |
3bdab16c | 91 | |
98e4c28b DB |
92 | should be initialized in struct pcmcia_driver, and handle |
93 | (SUSPEND == RESET_PHYSICAL) and (RESUME == CARD_RESET) events | |
94 | ||
c6fd7188 DB |
95 | * event handler initialization in struct pcmcia_driver (as of 2.6.13) |
96 | The event handler is notified of all events, and must be initialized | |
97 | as the event() callback in the driver's struct pcmcia_driver. | |
98 | ||
99 | * pcmcia/version.h should not be used (as of 2.6.13) | |
100 | This file will be removed eventually. | |
101 | ||
102 | * in-kernel device<->driver matching (as of 2.6.13) | |
5085cb26 DB |
103 | PCMCIA devices and their correct drivers can now be matched in |
104 | kernelspace. See 'devicetable.txt' for details. | |
105 | ||
106 | * Device model integration (as of 2.6.11) | |
107 | A struct pcmcia_device is registered with the device model core, | |
108 | and can be used (e.g. for SET_NETDEV_DEV) by using | |
109 | handle_to_dev(client_handle_t * handle). | |
110 | ||
906da809 OJ |
111 | * Convert internal I/O port addresses to unsigned int (as of 2.6.11) |
112 | ioaddr_t should be replaced by unsigned int in PCMCIA card drivers. | |
5085cb26 DB |
113 | |
114 | * irq_mask and irq_list parameters (as of 2.6.11) | |
115 | The irq_mask and irq_list parameters should no longer be used in | |
116 | PCMCIA card drivers. Instead, it is the job of the PCMCIA core to | |
117 | determine which IRQ should be used. Therefore, link->irq.IRQInfo2 | |
118 | is ignored. | |
119 | ||
120 | * client->PendingEvents is gone (as of 2.6.11) | |
121 | client->PendingEvents is no longer available. | |
122 | ||
123 | * client->Attributes are gone (as of 2.6.11) | |
124 | client->Attributes is unused, therefore it is removed from all | |
125 | PCMCIA card drivers | |
126 | ||
127 | * core functions no longer available (as of 2.6.11) | |
128 | The following functions have been removed from the kernel source | |
129 | because they are unused by all in-kernel drivers, and no external | |
3bdab16c MCC |
130 | driver was reported to rely on them:: |
131 | ||
5085cb26 DB |
132 | pcmcia_get_first_region() |
133 | pcmcia_get_next_region() | |
134 | pcmcia_modify_window() | |
135 | pcmcia_set_event_mask() | |
136 | pcmcia_get_first_window() | |
137 | pcmcia_get_next_window() | |
138 | ||
139 | * device list iteration upon module removal (as of 2.6.10) | |
140 | It is no longer necessary to iterate on the driver's internal | |
141 | client list and call the ->detach() function upon module removal. | |
142 | ||
143 | * Resource management. (as of 2.6.8) | |
144 | Although the PCMCIA subsystem will allocate resources for cards, | |
145 | it no longer marks these resources busy. This means that driver | |
146 | authors are now responsible for claiming your resources as per | |
147 | other drivers in Linux. You should use request_region() to mark | |
148 | your IO regions in-use, and request_mem_region() to mark your | |
149 | memory regions in-use. The name argument should be a pointer to | |
150 | your driver name. Eg, for pcnet_cs, name should point to the | |
151 | string "pcnet_cs". | |
661d04c6 DB |
152 | |
153 | * CardServices is gone | |
154 | CardServices() in 2.4 is just a big switch statement to call various | |
155 | services. In 2.6, all of those entry points are exported and called | |
156 | directly (except for pcmcia_report_error(), just use cs_error() instead). | |
157 | ||
158 | * struct pcmcia_driver | |
159 | You need to use struct pcmcia_driver and pcmcia_{un,}register_driver | |
160 | instead of {un,}register_pccard_driver |