2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic pci device routines.
26 #include <linux/dma-mapping.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
32 #include "rt2x00pci.h"
37 int rt2x00pci_write_tx_data(struct queue_entry
*entry
)
39 struct queue_entry_priv_pci
*entry_priv
= entry
->priv_data
;
40 struct skb_frame_desc
*skbdesc
;
43 rt2x00_desc_read(entry_priv
->desc
, 0, &word
);
46 * This should not happen, we already checked the entry
47 * was ours. When the hardware disagrees there has been
50 if (unlikely(rt2x00_get_field32(word
, TXD_ENTRY_OWNER_NIC
) ||
51 rt2x00_get_field32(word
, TXD_ENTRY_VALID
))) {
52 ERROR(entry
->queue
->rt2x00dev
,
53 "Corrupt queue %d, accessing entry which is not ours.\n"
54 "Please file bug report to %s.\n",
55 entry
->queue
->qid
, DRV_PROJECT
);
60 * Fill in skb descriptor
62 skbdesc
= get_skb_frame_desc(entry
->skb
);
63 skbdesc
->desc
= entry_priv
->desc
;
64 skbdesc
->desc_len
= entry
->queue
->desc_size
;
68 EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data
);
71 * TX/RX data handlers.
73 void rt2x00pci_rxdone(struct rt2x00_dev
*rt2x00dev
)
75 struct data_queue
*queue
= rt2x00dev
->rx
;
76 struct queue_entry
*entry
;
77 struct queue_entry_priv_pci
*entry_priv
;
78 struct skb_frame_desc
*skbdesc
;
82 entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
83 entry_priv
= entry
->priv_data
;
84 rt2x00_desc_read(entry_priv
->desc
, 0, &word
);
86 if (rt2x00_get_field32(word
, RXD_ENTRY_OWNER_NIC
))
90 * Fill in desc fields of the skb descriptor
92 skbdesc
= get_skb_frame_desc(entry
->skb
);
93 skbdesc
->desc
= entry_priv
->desc
;
94 skbdesc
->desc_len
= entry
->queue
->desc_size
;
97 * Send the frame to rt2x00lib for further processing.
99 rt2x00lib_rxdone(rt2x00dev
, entry
);
102 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone
);
105 * Device initialization handlers.
107 static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev
*rt2x00dev
,
108 struct data_queue
*queue
)
110 struct queue_entry_priv_pci
*entry_priv
;
116 * Allocate DMA memory for descriptor and buffer.
118 addr
= dma_alloc_coherent(rt2x00dev
->dev
,
119 queue
->limit
* queue
->desc_size
,
120 &dma
, GFP_KERNEL
| GFP_DMA
);
124 memset(addr
, 0, queue
->limit
* queue
->desc_size
);
127 * Initialize all queue entries to contain valid addresses.
129 for (i
= 0; i
< queue
->limit
; i
++) {
130 entry_priv
= queue
->entries
[i
].priv_data
;
131 entry_priv
->desc
= addr
+ i
* queue
->desc_size
;
132 entry_priv
->desc_dma
= dma
+ i
* queue
->desc_size
;
138 static void rt2x00pci_free_queue_dma(struct rt2x00_dev
*rt2x00dev
,
139 struct data_queue
*queue
)
141 struct queue_entry_priv_pci
*entry_priv
=
142 queue
->entries
[0].priv_data
;
144 if (entry_priv
->desc
)
145 dma_free_coherent(rt2x00dev
->dev
,
146 queue
->limit
* queue
->desc_size
,
147 entry_priv
->desc
, entry_priv
->desc_dma
);
148 entry_priv
->desc
= NULL
;
151 int rt2x00pci_initialize(struct rt2x00_dev
*rt2x00dev
)
153 struct pci_dev
*pci_dev
= to_pci_dev(rt2x00dev
->dev
);
154 struct data_queue
*queue
;
160 queue_for_each(rt2x00dev
, queue
) {
161 status
= rt2x00pci_alloc_queue_dma(rt2x00dev
, queue
);
167 * Register interrupt handler.
169 status
= request_irq(pci_dev
->irq
, rt2x00dev
->ops
->lib
->irq_handler
,
170 IRQF_SHARED
, pci_name(pci_dev
), rt2x00dev
);
172 ERROR(rt2x00dev
, "IRQ %d allocation failed (error %d).\n",
173 pci_dev
->irq
, status
);
180 queue_for_each(rt2x00dev
, queue
)
181 rt2x00pci_free_queue_dma(rt2x00dev
, queue
);
185 EXPORT_SYMBOL_GPL(rt2x00pci_initialize
);
187 void rt2x00pci_uninitialize(struct rt2x00_dev
*rt2x00dev
)
189 struct data_queue
*queue
;
194 free_irq(to_pci_dev(rt2x00dev
->dev
)->irq
, rt2x00dev
);
199 queue_for_each(rt2x00dev
, queue
)
200 rt2x00pci_free_queue_dma(rt2x00dev
, queue
);
202 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize
);
205 * PCI driver handlers.
207 static void rt2x00pci_free_reg(struct rt2x00_dev
*rt2x00dev
)
209 kfree(rt2x00dev
->rf
);
210 rt2x00dev
->rf
= NULL
;
212 kfree(rt2x00dev
->eeprom
);
213 rt2x00dev
->eeprom
= NULL
;
215 if (rt2x00dev
->csr
.base
) {
216 iounmap(rt2x00dev
->csr
.base
);
217 rt2x00dev
->csr
.base
= NULL
;
221 static int rt2x00pci_alloc_reg(struct rt2x00_dev
*rt2x00dev
)
223 struct pci_dev
*pci_dev
= to_pci_dev(rt2x00dev
->dev
);
225 rt2x00dev
->csr
.base
= ioremap(pci_resource_start(pci_dev
, 0),
226 pci_resource_len(pci_dev
, 0));
227 if (!rt2x00dev
->csr
.base
)
230 rt2x00dev
->eeprom
= kzalloc(rt2x00dev
->ops
->eeprom_size
, GFP_KERNEL
);
231 if (!rt2x00dev
->eeprom
)
234 rt2x00dev
->rf
= kzalloc(rt2x00dev
->ops
->rf_size
, GFP_KERNEL
);
241 ERROR_PROBE("Failed to allocate registers.\n");
243 rt2x00pci_free_reg(rt2x00dev
);
248 int rt2x00pci_probe(struct pci_dev
*pci_dev
, const struct pci_device_id
*id
)
250 struct rt2x00_ops
*ops
= (struct rt2x00_ops
*)id
->driver_data
;
251 struct ieee80211_hw
*hw
;
252 struct rt2x00_dev
*rt2x00dev
;
255 retval
= pci_request_regions(pci_dev
, pci_name(pci_dev
));
257 ERROR_PROBE("PCI request regions failed.\n");
261 retval
= pci_enable_device(pci_dev
);
263 ERROR_PROBE("Enable device failed.\n");
264 goto exit_release_regions
;
267 pci_set_master(pci_dev
);
269 if (pci_set_mwi(pci_dev
))
270 ERROR_PROBE("MWI not available.\n");
272 if (dma_set_mask(&pci_dev
->dev
, DMA_32BIT_MASK
)) {
273 ERROR_PROBE("PCI DMA not supported.\n");
275 goto exit_disable_device
;
278 hw
= ieee80211_alloc_hw(sizeof(struct rt2x00_dev
), ops
->hw
);
280 ERROR_PROBE("Failed to allocate hardware.\n");
282 goto exit_disable_device
;
285 pci_set_drvdata(pci_dev
, hw
);
287 rt2x00dev
= hw
->priv
;
288 rt2x00dev
->dev
= &pci_dev
->dev
;
289 rt2x00dev
->ops
= ops
;
292 retval
= rt2x00pci_alloc_reg(rt2x00dev
);
294 goto exit_free_device
;
296 retval
= rt2x00lib_probe_dev(rt2x00dev
);
303 rt2x00pci_free_reg(rt2x00dev
);
306 ieee80211_free_hw(hw
);
309 if (retval
!= -EBUSY
)
310 pci_disable_device(pci_dev
);
312 exit_release_regions
:
313 pci_release_regions(pci_dev
);
315 pci_set_drvdata(pci_dev
, NULL
);
319 EXPORT_SYMBOL_GPL(rt2x00pci_probe
);
321 void rt2x00pci_remove(struct pci_dev
*pci_dev
)
323 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
324 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
327 * Free all allocated data.
329 rt2x00lib_remove_dev(rt2x00dev
);
330 rt2x00pci_free_reg(rt2x00dev
);
331 ieee80211_free_hw(hw
);
334 * Free the PCI device data.
336 pci_set_drvdata(pci_dev
, NULL
);
337 pci_disable_device(pci_dev
);
338 pci_release_regions(pci_dev
);
340 EXPORT_SYMBOL_GPL(rt2x00pci_remove
);
343 int rt2x00pci_suspend(struct pci_dev
*pci_dev
, pm_message_t state
)
345 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
346 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
349 retval
= rt2x00lib_suspend(rt2x00dev
, state
);
353 rt2x00pci_free_reg(rt2x00dev
);
355 pci_save_state(pci_dev
);
356 pci_disable_device(pci_dev
);
357 return pci_set_power_state(pci_dev
, pci_choose_state(pci_dev
, state
));
359 EXPORT_SYMBOL_GPL(rt2x00pci_suspend
);
361 int rt2x00pci_resume(struct pci_dev
*pci_dev
)
363 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
364 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
367 if (pci_set_power_state(pci_dev
, PCI_D0
) ||
368 pci_enable_device(pci_dev
) ||
369 pci_restore_state(pci_dev
)) {
370 ERROR(rt2x00dev
, "Failed to resume device.\n");
374 retval
= rt2x00pci_alloc_reg(rt2x00dev
);
378 retval
= rt2x00lib_resume(rt2x00dev
);
385 rt2x00pci_free_reg(rt2x00dev
);
389 EXPORT_SYMBOL_GPL(rt2x00pci_resume
);
390 #endif /* CONFIG_PM */
393 * rt2x00pci module information.
395 MODULE_AUTHOR(DRV_PROJECT
);
396 MODULE_VERSION(DRV_VERSION
);
397 MODULE_DESCRIPTION("rt2x00 pci library");
398 MODULE_LICENSE("GPL");
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