2 Copyright (C) 2004 - 2009 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_regbusy_read(struct rt2x00_dev
*rt2x00dev
,
38 const unsigned int offset
,
39 const struct rt2x00_field32 field
,
44 for (i
= 0; i
< REGISTER_BUSY_COUNT
; i
++) {
45 rt2x00pci_register_read(rt2x00dev
, offset
, reg
);
46 if (!rt2x00_get_field32(*reg
, field
))
48 udelay(REGISTER_BUSY_DELAY
);
51 ERROR(rt2x00dev
, "Indirect register access failed: "
52 "offset=0x%.08x, value=0x%.08x\n", offset
, *reg
);
57 EXPORT_SYMBOL_GPL(rt2x00pci_regbusy_read
);
62 int rt2x00pci_write_tx_data(struct queue_entry
*entry
)
64 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
65 struct queue_entry_priv_pci
*entry_priv
= entry
->priv_data
;
66 struct skb_frame_desc
*skbdesc
;
69 * This should not happen, we already checked the entry
70 * was ours. When the hardware disagrees there has been
73 if (unlikely(rt2x00dev
->ops
->lib
->get_entry_state(entry
))) {
75 "Corrupt queue %d, accessing entry which is not ours.\n"
76 "Please file bug report to %s.\n",
77 entry
->queue
->qid
, DRV_PROJECT
);
82 * Fill in skb descriptor
84 skbdesc
= get_skb_frame_desc(entry
->skb
);
85 skbdesc
->desc
= entry_priv
->desc
;
86 skbdesc
->desc_len
= entry
->queue
->desc_size
;
90 EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data
);
93 * TX/RX data handlers.
95 void rt2x00pci_rxdone(struct rt2x00_dev
*rt2x00dev
)
97 struct data_queue
*queue
= rt2x00dev
->rx
;
98 struct queue_entry
*entry
;
99 struct queue_entry_priv_pci
*entry_priv
;
100 struct skb_frame_desc
*skbdesc
;
103 entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
104 entry_priv
= entry
->priv_data
;
106 if (rt2x00dev
->ops
->lib
->get_entry_state(entry
))
110 * Fill in desc fields of the skb descriptor
112 skbdesc
= get_skb_frame_desc(entry
->skb
);
113 skbdesc
->desc
= entry_priv
->desc
;
114 skbdesc
->desc_len
= entry
->queue
->desc_size
;
117 * Send the frame to rt2x00lib for further processing.
119 rt2x00lib_rxdone(rt2x00dev
, entry
);
122 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone
);
125 * Device initialization handlers.
127 static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev
*rt2x00dev
,
128 struct data_queue
*queue
)
130 struct queue_entry_priv_pci
*entry_priv
;
136 * Allocate DMA memory for descriptor and buffer.
138 addr
= dma_alloc_coherent(rt2x00dev
->dev
,
139 queue
->limit
* queue
->desc_size
,
140 &dma
, GFP_KERNEL
| GFP_DMA
);
144 memset(addr
, 0, queue
->limit
* queue
->desc_size
);
147 * Initialize all queue entries to contain valid addresses.
149 for (i
= 0; i
< queue
->limit
; i
++) {
150 entry_priv
= queue
->entries
[i
].priv_data
;
151 entry_priv
->desc
= addr
+ i
* queue
->desc_size
;
152 entry_priv
->desc_dma
= dma
+ i
* queue
->desc_size
;
158 static void rt2x00pci_free_queue_dma(struct rt2x00_dev
*rt2x00dev
,
159 struct data_queue
*queue
)
161 struct queue_entry_priv_pci
*entry_priv
=
162 queue
->entries
[0].priv_data
;
164 if (entry_priv
->desc
)
165 dma_free_coherent(rt2x00dev
->dev
,
166 queue
->limit
* queue
->desc_size
,
167 entry_priv
->desc
, entry_priv
->desc_dma
);
168 entry_priv
->desc
= NULL
;
171 int rt2x00pci_initialize(struct rt2x00_dev
*rt2x00dev
)
173 struct pci_dev
*pci_dev
= to_pci_dev(rt2x00dev
->dev
);
174 struct data_queue
*queue
;
180 queue_for_each(rt2x00dev
, queue
) {
181 status
= rt2x00pci_alloc_queue_dma(rt2x00dev
, queue
);
187 * Register interrupt handler.
189 status
= request_irq(pci_dev
->irq
, rt2x00dev
->ops
->lib
->irq_handler
,
190 IRQF_SHARED
, pci_name(pci_dev
), rt2x00dev
);
192 ERROR(rt2x00dev
, "IRQ %d allocation failed (error %d).\n",
193 pci_dev
->irq
, status
);
200 queue_for_each(rt2x00dev
, queue
)
201 rt2x00pci_free_queue_dma(rt2x00dev
, queue
);
205 EXPORT_SYMBOL_GPL(rt2x00pci_initialize
);
207 void rt2x00pci_uninitialize(struct rt2x00_dev
*rt2x00dev
)
209 struct data_queue
*queue
;
214 free_irq(to_pci_dev(rt2x00dev
->dev
)->irq
, rt2x00dev
);
219 queue_for_each(rt2x00dev
, queue
)
220 rt2x00pci_free_queue_dma(rt2x00dev
, queue
);
222 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize
);
225 * PCI driver handlers.
227 static void rt2x00pci_free_reg(struct rt2x00_dev
*rt2x00dev
)
229 kfree(rt2x00dev
->rf
);
230 rt2x00dev
->rf
= NULL
;
232 kfree(rt2x00dev
->eeprom
);
233 rt2x00dev
->eeprom
= NULL
;
235 if (rt2x00dev
->csr
.base
) {
236 iounmap(rt2x00dev
->csr
.base
);
237 rt2x00dev
->csr
.base
= NULL
;
241 static int rt2x00pci_alloc_reg(struct rt2x00_dev
*rt2x00dev
)
243 struct pci_dev
*pci_dev
= to_pci_dev(rt2x00dev
->dev
);
245 rt2x00dev
->csr
.base
= pci_ioremap_bar(pci_dev
, 0);
246 if (!rt2x00dev
->csr
.base
)
249 rt2x00dev
->eeprom
= kzalloc(rt2x00dev
->ops
->eeprom_size
, GFP_KERNEL
);
250 if (!rt2x00dev
->eeprom
)
253 rt2x00dev
->rf
= kzalloc(rt2x00dev
->ops
->rf_size
, GFP_KERNEL
);
260 ERROR_PROBE("Failed to allocate registers.\n");
262 rt2x00pci_free_reg(rt2x00dev
);
267 int rt2x00pci_probe(struct pci_dev
*pci_dev
, const struct pci_device_id
*id
)
269 struct rt2x00_ops
*ops
= (struct rt2x00_ops
*)id
->driver_data
;
270 struct ieee80211_hw
*hw
;
271 struct rt2x00_dev
*rt2x00dev
;
274 retval
= pci_request_regions(pci_dev
, pci_name(pci_dev
));
276 ERROR_PROBE("PCI request regions failed.\n");
280 retval
= pci_enable_device(pci_dev
);
282 ERROR_PROBE("Enable device failed.\n");
283 goto exit_release_regions
;
286 pci_set_master(pci_dev
);
288 if (pci_set_mwi(pci_dev
))
289 ERROR_PROBE("MWI not available.\n");
291 if (dma_set_mask(&pci_dev
->dev
, DMA_BIT_MASK(32))) {
292 ERROR_PROBE("PCI DMA not supported.\n");
294 goto exit_disable_device
;
297 hw
= ieee80211_alloc_hw(sizeof(struct rt2x00_dev
), ops
->hw
);
299 ERROR_PROBE("Failed to allocate hardware.\n");
301 goto exit_disable_device
;
304 pci_set_drvdata(pci_dev
, hw
);
306 rt2x00dev
= hw
->priv
;
307 rt2x00dev
->dev
= &pci_dev
->dev
;
308 rt2x00dev
->ops
= ops
;
311 retval
= rt2x00pci_alloc_reg(rt2x00dev
);
313 goto exit_free_device
;
315 retval
= rt2x00lib_probe_dev(rt2x00dev
);
322 rt2x00pci_free_reg(rt2x00dev
);
325 ieee80211_free_hw(hw
);
328 if (retval
!= -EBUSY
)
329 pci_disable_device(pci_dev
);
331 exit_release_regions
:
332 pci_release_regions(pci_dev
);
334 pci_set_drvdata(pci_dev
, NULL
);
338 EXPORT_SYMBOL_GPL(rt2x00pci_probe
);
340 void rt2x00pci_remove(struct pci_dev
*pci_dev
)
342 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
343 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
346 * Free all allocated data.
348 rt2x00lib_remove_dev(rt2x00dev
);
349 rt2x00pci_free_reg(rt2x00dev
);
350 ieee80211_free_hw(hw
);
353 * Free the PCI device data.
355 pci_set_drvdata(pci_dev
, NULL
);
356 pci_disable_device(pci_dev
);
357 pci_release_regions(pci_dev
);
359 EXPORT_SYMBOL_GPL(rt2x00pci_remove
);
362 int rt2x00pci_suspend(struct pci_dev
*pci_dev
, pm_message_t state
)
364 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
365 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
368 retval
= rt2x00lib_suspend(rt2x00dev
, state
);
372 rt2x00pci_free_reg(rt2x00dev
);
374 pci_save_state(pci_dev
);
375 pci_disable_device(pci_dev
);
376 return pci_set_power_state(pci_dev
, pci_choose_state(pci_dev
, state
));
378 EXPORT_SYMBOL_GPL(rt2x00pci_suspend
);
380 int rt2x00pci_resume(struct pci_dev
*pci_dev
)
382 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
383 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
386 if (pci_set_power_state(pci_dev
, PCI_D0
) ||
387 pci_enable_device(pci_dev
) ||
388 pci_restore_state(pci_dev
)) {
389 ERROR(rt2x00dev
, "Failed to resume device.\n");
393 retval
= rt2x00pci_alloc_reg(rt2x00dev
);
397 retval
= rt2x00lib_resume(rt2x00dev
);
404 rt2x00pci_free_reg(rt2x00dev
);
408 EXPORT_SYMBOL_GPL(rt2x00pci_resume
);
409 #endif /* CONFIG_PM */
412 * rt2x00pci module information.
414 MODULE_AUTHOR(DRV_PROJECT
);
415 MODULE_VERSION(DRV_VERSION
);
416 MODULE_DESCRIPTION("rt2x00 pci library");
417 MODULE_LICENSE("GPL");