2 Copyright (C) 2004 - 2007 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_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
38 struct ieee80211_tx_control *control)
40 struct rt2x00_dev *rt2x00dev = hw->priv;
41 struct skb_desc *desc;
42 struct data_ring *ring;
43 struct data_entry *entry;
46 * Just in case mac80211 doesn't set this correctly,
47 * but we need this queue set for the descriptor
50 control->queue = IEEE80211_TX_QUEUE_BEACON;
51 ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
52 entry = rt2x00_get_data_entry(ring);
55 * Fill in skb descriptor
57 desc = get_skb_desc(skb);
58 desc->desc_len = ring->desc_size;
59 desc->data_len = skb->len;
60 desc->desc = entry->priv;
61 desc->data = skb->data;
65 memcpy(entry->data_addr, skb->data, skb->len);
66 rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
69 * Enable beacon generation.
71 rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
75 EXPORT_SYMBOL_GPL(rt2x00pci_beacon_update);
80 int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev,
81 struct data_ring *ring, struct sk_buff *skb,
82 struct ieee80211_tx_control *control)
84 struct data_entry *entry = rt2x00_get_data_entry(ring);
85 __le32 *txd = entry->priv;
86 struct skb_desc *desc;
89 if (rt2x00_ring_full(ring)) {
90 ieee80211_stop_queue(rt2x00dev->hw, control->queue);
94 rt2x00_desc_read(txd, 0, &word);
96 if (rt2x00_get_field32(word, TXD_ENTRY_OWNER_NIC) ||
97 rt2x00_get_field32(word, TXD_ENTRY_VALID)) {
99 "Arrived at non-free entry in the non-full queue %d.\n"
100 "Please file bug report to %s.\n",
101 control->queue, DRV_PROJECT);
102 ieee80211_stop_queue(rt2x00dev->hw, control->queue);
107 * Fill in skb descriptor
109 desc = get_skb_desc(skb);
110 desc->desc_len = ring->desc_size;
111 desc->data_len = skb->len;
112 desc->desc = entry->priv;
113 desc->data = skb->data;
117 memcpy(entry->data_addr, skb->data, skb->len);
118 rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
120 rt2x00_ring_index_inc(ring);
122 if (rt2x00_ring_full(ring))
123 ieee80211_stop_queue(rt2x00dev->hw, control->queue);
127 EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
130 * TX/RX data handlers.
132 void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
134 struct data_ring *ring = rt2x00dev->rx;
135 struct data_entry *entry;
137 struct ieee80211_hdr *hdr;
138 struct skb_desc *skbdesc;
139 struct rxdata_entry_desc desc;
146 entry = rt2x00_get_data_entry(ring);
148 rt2x00_desc_read(rxd, 0, &word);
150 if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC))
153 memset(&desc, 0, sizeof(desc));
154 rt2x00dev->ops->lib->fill_rxdone(entry, &desc);
156 hdr = (struct ieee80211_hdr *)entry->data_addr;
158 ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
161 * The data behind the ieee80211 header must be
162 * aligned on a 4 byte boundary.
164 align = header_size % 4;
167 * Allocate the sk_buffer, initialize it and copy
170 skb = dev_alloc_skb(desc.size + align);
174 skb_reserve(skb, align);
175 memcpy(skb_put(skb, desc.size), entry->data_addr, desc.size);
178 * Fill in skb descriptor
180 skbdesc = get_skb_desc(skb);
181 skbdesc->desc_len = entry->ring->desc_size;
182 skbdesc->data_len = skb->len;
183 skbdesc->desc = entry->priv;
184 skbdesc->data = skb->data;
185 skbdesc->ring = ring;
186 skbdesc->entry = entry;
189 * Send the frame to rt2x00lib for further processing.
191 rt2x00lib_rxdone(entry, skb, &desc);
193 if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) {
194 rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1);
195 rt2x00_desc_write(rxd, 0, word);
198 rt2x00_ring_index_inc(ring);
201 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
203 void rt2x00pci_txdone(struct rt2x00_dev *rt2x00dev, struct data_entry *entry,
204 const int tx_status, const int retry)
208 rt2x00lib_txdone(entry, tx_status, retry);
211 * Make this entry available for reuse.
215 rt2x00_desc_read(entry->priv, 0, &word);
216 rt2x00_set_field32(&word, TXD_ENTRY_OWNER_NIC, 0);
217 rt2x00_set_field32(&word, TXD_ENTRY_VALID, 0);
218 rt2x00_desc_write(entry->priv, 0, word);
220 rt2x00_ring_index_done_inc(entry->ring);
223 * If the data ring was full before the txdone handler
224 * we must make sure the packet queue in the mac80211 stack
225 * is reenabled when the txdone handler has finished.
227 if (!rt2x00_ring_full(entry->ring))
228 ieee80211_wake_queue(rt2x00dev->hw,
229 entry->tx_status.control.queue);
232 EXPORT_SYMBOL_GPL(rt2x00pci_txdone);
235 * Device initialization handlers.
237 #define priv_offset(__ring, __i) \
239 ring->data_addr + (i * ring->desc_size); \
242 #define data_addr_offset(__ring, __i) \
244 (__ring)->data_addr + \
245 ((__ring)->stats.limit * (__ring)->desc_size) + \
246 ((__i) * (__ring)->data_size); \
249 #define data_dma_offset(__ring, __i) \
251 (__ring)->data_dma + \
252 ((__ring)->stats.limit * (__ring)->desc_size) + \
253 ((__i) * (__ring)->data_size); \
256 static int rt2x00pci_alloc_dma(struct rt2x00_dev *rt2x00dev,
257 struct data_ring *ring)
262 * Allocate DMA memory for descriptor and buffer.
264 ring->data_addr = pci_alloc_consistent(rt2x00dev_pci(rt2x00dev),
265 rt2x00_get_ring_size(ring),
267 if (!ring->data_addr)
271 * Initialize all ring entries to contain valid
274 for (i = 0; i < ring->stats.limit; i++) {
275 ring->entry[i].priv = priv_offset(ring, i);
276 ring->entry[i].data_addr = data_addr_offset(ring, i);
277 ring->entry[i].data_dma = data_dma_offset(ring, i);
283 static void rt2x00pci_free_dma(struct rt2x00_dev *rt2x00dev,
284 struct data_ring *ring)
287 pci_free_consistent(rt2x00dev_pci(rt2x00dev),
288 rt2x00_get_ring_size(ring),
289 ring->data_addr, ring->data_dma);
290 ring->data_addr = NULL;
293 int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
295 struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
296 struct data_ring *ring;
302 ring_for_each(rt2x00dev, ring) {
303 status = rt2x00pci_alloc_dma(rt2x00dev, ring);
309 * Register interrupt handler.
311 status = request_irq(pci_dev->irq, rt2x00dev->ops->lib->irq_handler,
312 IRQF_SHARED, pci_name(pci_dev), rt2x00dev);
314 ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
315 pci_dev->irq, status);
322 rt2x00pci_uninitialize(rt2x00dev);
326 EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
328 void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
330 struct data_ring *ring;
335 free_irq(rt2x00dev_pci(rt2x00dev)->irq, rt2x00dev);
340 ring_for_each(rt2x00dev, ring)
341 rt2x00pci_free_dma(rt2x00dev, ring);
343 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
346 * PCI driver handlers.
348 static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
350 kfree(rt2x00dev->rf);
351 rt2x00dev->rf = NULL;
353 kfree(rt2x00dev->eeprom);
354 rt2x00dev->eeprom = NULL;
356 if (rt2x00dev->csr_addr) {
357 iounmap(rt2x00dev->csr_addr);
358 rt2x00dev->csr_addr = NULL;
362 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
364 struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
366 rt2x00dev->csr_addr = ioremap(pci_resource_start(pci_dev, 0),
367 pci_resource_len(pci_dev, 0));
368 if (!rt2x00dev->csr_addr)
371 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
372 if (!rt2x00dev->eeprom)
375 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
382 ERROR_PROBE("Failed to allocate registers.\n");
384 rt2x00pci_free_reg(rt2x00dev);
389 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
391 struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data;
392 struct ieee80211_hw *hw;
393 struct rt2x00_dev *rt2x00dev;
396 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
398 ERROR_PROBE("PCI request regions failed.\n");
402 retval = pci_enable_device(pci_dev);
404 ERROR_PROBE("Enable device failed.\n");
405 goto exit_release_regions;
408 pci_set_master(pci_dev);
410 if (pci_set_mwi(pci_dev))
411 ERROR_PROBE("MWI not available.\n");
413 if (pci_set_dma_mask(pci_dev, DMA_64BIT_MASK) &&
414 pci_set_dma_mask(pci_dev, DMA_32BIT_MASK)) {
415 ERROR_PROBE("PCI DMA not supported.\n");
417 goto exit_disable_device;
420 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
422 ERROR_PROBE("Failed to allocate hardware.\n");
424 goto exit_disable_device;
427 pci_set_drvdata(pci_dev, hw);
429 rt2x00dev = hw->priv;
430 rt2x00dev->dev = pci_dev;
431 rt2x00dev->ops = ops;
434 retval = rt2x00pci_alloc_reg(rt2x00dev);
436 goto exit_free_device;
438 retval = rt2x00lib_probe_dev(rt2x00dev);
445 rt2x00pci_free_reg(rt2x00dev);
448 ieee80211_free_hw(hw);
451 if (retval != -EBUSY)
452 pci_disable_device(pci_dev);
454 exit_release_regions:
455 pci_release_regions(pci_dev);
457 pci_set_drvdata(pci_dev, NULL);
461 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
463 void rt2x00pci_remove(struct pci_dev *pci_dev)
465 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
466 struct rt2x00_dev *rt2x00dev = hw->priv;
469 * Free all allocated data.
471 rt2x00lib_remove_dev(rt2x00dev);
472 rt2x00pci_free_reg(rt2x00dev);
473 ieee80211_free_hw(hw);
476 * Free the PCI device data.
478 pci_set_drvdata(pci_dev, NULL);
479 pci_disable_device(pci_dev);
480 pci_release_regions(pci_dev);
482 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
485 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
487 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
488 struct rt2x00_dev *rt2x00dev = hw->priv;
491 retval = rt2x00lib_suspend(rt2x00dev, state);
495 rt2x00pci_free_reg(rt2x00dev);
497 pci_save_state(pci_dev);
498 pci_disable_device(pci_dev);
499 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
501 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
503 int rt2x00pci_resume(struct pci_dev *pci_dev)
505 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
506 struct rt2x00_dev *rt2x00dev = hw->priv;
509 if (pci_set_power_state(pci_dev, PCI_D0) ||
510 pci_enable_device(pci_dev) ||
511 pci_restore_state(pci_dev)) {
512 ERROR(rt2x00dev, "Failed to resume device.\n");
516 retval = rt2x00pci_alloc_reg(rt2x00dev);
520 retval = rt2x00lib_resume(rt2x00dev);
527 rt2x00pci_free_reg(rt2x00dev);
531 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
532 #endif /* CONFIG_PM */
535 * rt2x00pci module information.
537 MODULE_AUTHOR(DRV_PROJECT);
538 MODULE_VERSION(DRV_VERSION);
539 MODULE_DESCRIPTION("rt2x00 library");
540 MODULE_LICENSE("GPL");