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 rt2x00_dev *rt2x00dev,
38 struct data_queue *queue, struct sk_buff *skb,
39 struct ieee80211_tx_control *control)
41 struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
42 struct queue_entry_priv_pci_tx *priv_tx = entry->priv_data;
43 struct skb_frame_desc *skbdesc;
44 struct txentry_desc txdesc;
47 if (rt2x00queue_full(queue))
50 rt2x00_desc_read(priv_tx->desc, 0, &word);
52 if (rt2x00_get_field32(word, TXD_ENTRY_OWNER_NIC) ||
53 rt2x00_get_field32(word, TXD_ENTRY_VALID)) {
55 "Arrived at non-free entry in the non-full queue %d.\n"
56 "Please file bug report to %s.\n",
57 entry->queue->qid, DRV_PROJECT);
62 * Copy all TX descriptor information into txdesc,
63 * after that we are free to use the skb->cb array
64 * for our information.
67 rt2x00queue_create_tx_descriptor(entry, &txdesc, control);
70 * Fill in skb descriptor
72 skbdesc = get_skb_frame_desc(skb);
73 skbdesc->data = skb->data;
74 skbdesc->data_len = skb->len;
75 skbdesc->desc = priv_tx->desc;
76 skbdesc->desc_len = queue->desc_size;
77 skbdesc->entry = entry;
79 memcpy(&priv_tx->control, control, sizeof(priv_tx->control));
80 memcpy(priv_tx->data, skb->data, skb->len);
82 rt2x00queue_write_tx_descriptor(entry, &txdesc);
83 rt2x00queue_index_inc(queue, Q_INDEX);
87 EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
90 * TX/RX data handlers.
92 void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
94 struct data_queue *queue = rt2x00dev->rx;
95 struct queue_entry *entry;
96 struct queue_entry_priv_pci_rx *priv_rx;
97 struct ieee80211_hdr *hdr;
98 struct skb_frame_desc *skbdesc;
99 struct rxdone_entry_desc rxdesc;
105 entry = rt2x00queue_get_entry(queue, Q_INDEX);
106 priv_rx = entry->priv_data;
107 rt2x00_desc_read(priv_rx->desc, 0, &word);
109 if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC))
112 memset(&rxdesc, 0, sizeof(rxdesc));
113 rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
115 hdr = (struct ieee80211_hdr *)priv_rx->data;
117 ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
120 * The data behind the ieee80211 header must be
121 * aligned on a 4 byte boundary.
123 align = header_size % 4;
126 * Allocate the sk_buffer, initialize it and copy
129 entry->skb = dev_alloc_skb(rxdesc.size + align);
133 skb_reserve(entry->skb, align);
134 memcpy(skb_put(entry->skb, rxdesc.size),
135 priv_rx->data, rxdesc.size);
138 * Fill in skb descriptor
140 skbdesc = get_skb_frame_desc(entry->skb);
141 memset(skbdesc, 0, sizeof(*skbdesc));
142 skbdesc->data = entry->skb->data;
143 skbdesc->data_len = entry->skb->len;
144 skbdesc->desc = priv_rx->desc;
145 skbdesc->desc_len = queue->desc_size;
146 skbdesc->entry = entry;
149 * Send the frame to rt2x00lib for further processing.
151 rt2x00lib_rxdone(entry, &rxdesc);
153 if (test_bit(DEVICE_ENABLED_RADIO, &queue->rt2x00dev->flags)) {
154 rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1);
155 rt2x00_desc_write(priv_rx->desc, 0, word);
158 rt2x00queue_index_inc(queue, Q_INDEX);
161 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
163 void rt2x00pci_txdone(struct rt2x00_dev *rt2x00dev, struct queue_entry *entry,
164 struct txdone_entry_desc *txdesc)
166 struct queue_entry_priv_pci_tx *priv_tx = entry->priv_data;
169 txdesc->control = &priv_tx->control;
170 rt2x00lib_txdone(entry, txdesc);
173 * Make this entry available for reuse.
177 rt2x00_desc_read(priv_tx->desc, 0, &word);
178 rt2x00_set_field32(&word, TXD_ENTRY_OWNER_NIC, 0);
179 rt2x00_set_field32(&word, TXD_ENTRY_VALID, 0);
180 rt2x00_desc_write(priv_tx->desc, 0, word);
182 rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
185 * If the data queue was full before the txdone handler
186 * we must make sure the packet queue in the mac80211 stack
187 * is reenabled when the txdone handler has finished.
189 if (!rt2x00queue_full(entry->queue))
190 ieee80211_wake_queue(rt2x00dev->hw, priv_tx->control.queue);
193 EXPORT_SYMBOL_GPL(rt2x00pci_txdone);
196 * Device initialization handlers.
198 #define desc_size(__queue) \
200 ((__queue)->limit * (__queue)->desc_size);\
203 #define data_size(__queue) \
205 ((__queue)->limit * (__queue)->data_size);\
208 #define dma_size(__queue) \
210 data_size(__queue) + desc_size(__queue);\
213 #define desc_offset(__queue, __base, __i) \
215 (__base) + data_size(__queue) + \
216 ((__i) * (__queue)->desc_size); \
219 #define data_offset(__queue, __base, __i) \
222 ((__i) * (__queue)->data_size); \
225 static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
226 struct data_queue *queue)
228 struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
229 struct queue_entry_priv_pci_rx *priv_rx;
230 struct queue_entry_priv_pci_tx *priv_tx;
240 * Allocate DMA memory for descriptor and buffer.
242 addr = pci_alloc_consistent(pci_dev, dma_size(queue), &dma);
246 memset(addr, 0, dma_size(queue));
249 * Initialize all queue entries to contain valid addresses.
251 for (i = 0; i < queue->limit; i++) {
252 desc_addr = desc_offset(queue, addr, i);
253 desc_dma = desc_offset(queue, dma, i);
254 data_addr = data_offset(queue, addr, i);
255 data_dma = data_offset(queue, dma, i);
257 if (queue->qid == QID_RX) {
258 priv_rx = queue->entries[i].priv_data;
259 priv_rx->desc = desc_addr;
260 priv_rx->desc_dma = desc_dma;
261 priv_rx->data = data_addr;
262 priv_rx->data_dma = data_dma;
264 priv_tx = queue->entries[i].priv_data;
265 priv_tx->desc = desc_addr;
266 priv_tx->desc_dma = desc_dma;
267 priv_tx->data = data_addr;
268 priv_tx->data_dma = data_dma;
275 static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
276 struct data_queue *queue)
278 struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
279 struct queue_entry_priv_pci_rx *priv_rx;
280 struct queue_entry_priv_pci_tx *priv_tx;
284 if (queue->qid == QID_RX) {
285 priv_rx = queue->entries[0].priv_data;
286 data_addr = priv_rx->data;
287 data_dma = priv_rx->data_dma;
289 priv_rx->data = NULL;
291 priv_tx = queue->entries[0].priv_data;
292 data_addr = priv_tx->data;
293 data_dma = priv_tx->data_dma;
295 priv_tx->data = NULL;
299 pci_free_consistent(pci_dev, dma_size(queue),
300 data_addr, data_dma);
303 int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
305 struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
306 struct data_queue *queue;
312 queue_for_each(rt2x00dev, queue) {
313 status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
319 * Register interrupt handler.
321 status = request_irq(pci_dev->irq, rt2x00dev->ops->lib->irq_handler,
322 IRQF_SHARED, pci_name(pci_dev), rt2x00dev);
324 ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
325 pci_dev->irq, status);
332 queue_for_each(rt2x00dev, queue)
333 rt2x00pci_free_queue_dma(rt2x00dev, queue);
337 EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
339 void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
341 struct data_queue *queue;
346 free_irq(rt2x00dev_pci(rt2x00dev)->irq, rt2x00dev);
351 queue_for_each(rt2x00dev, queue)
352 rt2x00pci_free_queue_dma(rt2x00dev, queue);
354 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
357 * PCI driver handlers.
359 static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
361 kfree(rt2x00dev->rf);
362 rt2x00dev->rf = NULL;
364 kfree(rt2x00dev->eeprom);
365 rt2x00dev->eeprom = NULL;
367 if (rt2x00dev->csr.base) {
368 iounmap(rt2x00dev->csr.base);
369 rt2x00dev->csr.base = NULL;
373 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
375 struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
377 rt2x00dev->csr.base = ioremap(pci_resource_start(pci_dev, 0),
378 pci_resource_len(pci_dev, 0));
379 if (!rt2x00dev->csr.base)
382 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
383 if (!rt2x00dev->eeprom)
386 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
393 ERROR_PROBE("Failed to allocate registers.\n");
395 rt2x00pci_free_reg(rt2x00dev);
400 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
402 struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data;
403 struct ieee80211_hw *hw;
404 struct rt2x00_dev *rt2x00dev;
407 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
409 ERROR_PROBE("PCI request regions failed.\n");
413 retval = pci_enable_device(pci_dev);
415 ERROR_PROBE("Enable device failed.\n");
416 goto exit_release_regions;
419 pci_set_master(pci_dev);
421 if (pci_set_mwi(pci_dev))
422 ERROR_PROBE("MWI not available.\n");
424 if (pci_set_dma_mask(pci_dev, DMA_64BIT_MASK) &&
425 pci_set_dma_mask(pci_dev, DMA_32BIT_MASK)) {
426 ERROR_PROBE("PCI DMA not supported.\n");
428 goto exit_disable_device;
431 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
433 ERROR_PROBE("Failed to allocate hardware.\n");
435 goto exit_disable_device;
438 pci_set_drvdata(pci_dev, hw);
440 rt2x00dev = hw->priv;
441 rt2x00dev->dev = pci_dev;
442 rt2x00dev->ops = ops;
445 retval = rt2x00pci_alloc_reg(rt2x00dev);
447 goto exit_free_device;
449 retval = rt2x00lib_probe_dev(rt2x00dev);
456 rt2x00pci_free_reg(rt2x00dev);
459 ieee80211_free_hw(hw);
462 if (retval != -EBUSY)
463 pci_disable_device(pci_dev);
465 exit_release_regions:
466 pci_release_regions(pci_dev);
468 pci_set_drvdata(pci_dev, NULL);
472 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
474 void rt2x00pci_remove(struct pci_dev *pci_dev)
476 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
477 struct rt2x00_dev *rt2x00dev = hw->priv;
480 * Free all allocated data.
482 rt2x00lib_remove_dev(rt2x00dev);
483 rt2x00pci_free_reg(rt2x00dev);
484 ieee80211_free_hw(hw);
487 * Free the PCI device data.
489 pci_set_drvdata(pci_dev, NULL);
490 pci_disable_device(pci_dev);
491 pci_release_regions(pci_dev);
493 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
496 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
498 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
499 struct rt2x00_dev *rt2x00dev = hw->priv;
502 retval = rt2x00lib_suspend(rt2x00dev, state);
506 rt2x00pci_free_reg(rt2x00dev);
508 pci_save_state(pci_dev);
509 pci_disable_device(pci_dev);
510 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
512 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
514 int rt2x00pci_resume(struct pci_dev *pci_dev)
516 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
517 struct rt2x00_dev *rt2x00dev = hw->priv;
520 if (pci_set_power_state(pci_dev, PCI_D0) ||
521 pci_enable_device(pci_dev) ||
522 pci_restore_state(pci_dev)) {
523 ERROR(rt2x00dev, "Failed to resume device.\n");
527 retval = rt2x00pci_alloc_reg(rt2x00dev);
531 retval = rt2x00lib_resume(rt2x00dev);
538 rt2x00pci_free_reg(rt2x00dev);
542 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
543 #endif /* CONFIG_PM */
546 * rt2x00pci module information.
548 MODULE_AUTHOR(DRV_PROJECT);
549 MODULE_VERSION(DRV_VERSION);
550 MODULE_DESCRIPTION("rt2x00 pci library");
551 MODULE_LICENSE("GPL");