2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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>
30 #include <linux/slab.h>
33 #include "rt2x00pci.h"
38 int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
39 const unsigned int offset,
40 const struct rt2x00_field32 field,
45 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
48 for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
49 rt2x00pci_register_read(rt2x00dev, offset, reg);
50 if (!rt2x00_get_field32(*reg, field))
52 udelay(REGISTER_BUSY_DELAY);
55 ERROR(rt2x00dev, "Indirect register access failed: "
56 "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
61 EXPORT_SYMBOL_GPL(rt2x00pci_regbusy_read);
66 int rt2x00pci_write_tx_data(struct queue_entry *entry,
67 struct txentry_desc *txdesc)
69 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
72 * This should not happen, we already checked the entry
73 * was ours. When the hardware disagrees there has been
76 if (unlikely(rt2x00dev->ops->lib->get_entry_state(entry))) {
78 "Corrupt queue %d, accessing entry which is not ours.\n"
79 "Please file bug report to %s.\n",
80 entry->queue->qid, DRV_PROJECT);
85 * Add the requested extra tx headroom in front of the skb.
87 skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom);
88 memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom);
91 * Call the driver's write_tx_datadesc function, if it exists.
93 if (rt2x00dev->ops->lib->write_tx_datadesc)
94 rt2x00dev->ops->lib->write_tx_datadesc(entry, txdesc);
99 if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
100 rt2x00queue_map_txskb(rt2x00dev, entry->skb);
104 EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
107 * TX/RX data handlers.
109 void rt2x00pci_txdone(struct queue_entry *entry,
110 struct txdone_entry_desc *txdesc)
112 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
113 struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
118 rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
121 * Remove the extra tx headroom from the skb.
123 skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom);
126 * Signal that the TX descriptor is no longer in the skb.
128 skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;
131 * Pass on to rt2x00lib.
133 rt2x00lib_txdone(entry, txdesc);
135 EXPORT_SYMBOL_GPL(rt2x00pci_txdone);
137 void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
139 struct data_queue *queue = rt2x00dev->rx;
140 struct queue_entry *entry;
141 struct queue_entry_priv_pci *entry_priv;
142 struct skb_frame_desc *skbdesc;
145 entry = rt2x00queue_get_entry(queue, Q_INDEX);
146 entry_priv = entry->priv_data;
148 if (rt2x00dev->ops->lib->get_entry_state(entry))
152 * Fill in desc fields of the skb descriptor
154 skbdesc = get_skb_frame_desc(entry->skb);
155 skbdesc->desc = entry_priv->desc;
156 skbdesc->desc_len = entry->queue->desc_size;
159 * Send the frame to rt2x00lib for further processing.
161 rt2x00lib_rxdone(rt2x00dev, entry);
164 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
167 * Device initialization handlers.
169 static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
170 struct data_queue *queue)
172 struct queue_entry_priv_pci *entry_priv;
178 * Allocate DMA memory for descriptor and buffer.
180 addr = dma_alloc_coherent(rt2x00dev->dev,
181 queue->limit * queue->desc_size,
182 &dma, GFP_KERNEL | GFP_DMA);
186 memset(addr, 0, queue->limit * queue->desc_size);
189 * Initialize all queue entries to contain valid addresses.
191 for (i = 0; i < queue->limit; i++) {
192 entry_priv = queue->entries[i].priv_data;
193 entry_priv->desc = addr + i * queue->desc_size;
194 entry_priv->desc_dma = dma + i * queue->desc_size;
200 static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
201 struct data_queue *queue)
203 struct queue_entry_priv_pci *entry_priv =
204 queue->entries[0].priv_data;
206 if (entry_priv->desc)
207 dma_free_coherent(rt2x00dev->dev,
208 queue->limit * queue->desc_size,
209 entry_priv->desc, entry_priv->desc_dma);
210 entry_priv->desc = NULL;
213 int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
215 struct data_queue *queue;
221 queue_for_each(rt2x00dev, queue) {
222 status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
228 * Register interrupt handler.
230 status = request_irq(rt2x00dev->irq, rt2x00dev->ops->lib->irq_handler,
231 IRQF_SHARED, rt2x00dev->name, rt2x00dev);
233 ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
234 rt2x00dev->irq, status);
241 queue_for_each(rt2x00dev, queue)
242 rt2x00pci_free_queue_dma(rt2x00dev, queue);
246 EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
248 void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
250 struct data_queue *queue;
255 free_irq(rt2x00dev->irq, rt2x00dev);
260 queue_for_each(rt2x00dev, queue)
261 rt2x00pci_free_queue_dma(rt2x00dev, queue);
263 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
266 * PCI driver handlers.
268 static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
270 kfree(rt2x00dev->rf);
271 rt2x00dev->rf = NULL;
273 kfree(rt2x00dev->eeprom);
274 rt2x00dev->eeprom = NULL;
276 if (rt2x00dev->csr.base) {
277 iounmap(rt2x00dev->csr.base);
278 rt2x00dev->csr.base = NULL;
282 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
284 struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
286 rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
287 if (!rt2x00dev->csr.base)
290 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
291 if (!rt2x00dev->eeprom)
294 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
301 ERROR_PROBE("Failed to allocate registers.\n");
303 rt2x00pci_free_reg(rt2x00dev);
308 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
310 struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data;
311 struct ieee80211_hw *hw;
312 struct rt2x00_dev *rt2x00dev;
315 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
317 ERROR_PROBE("PCI request regions failed.\n");
321 retval = pci_enable_device(pci_dev);
323 ERROR_PROBE("Enable device failed.\n");
324 goto exit_release_regions;
327 pci_set_master(pci_dev);
329 if (pci_set_mwi(pci_dev))
330 ERROR_PROBE("MWI not available.\n");
332 if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
333 ERROR_PROBE("PCI DMA not supported.\n");
335 goto exit_disable_device;
338 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
340 ERROR_PROBE("Failed to allocate hardware.\n");
342 goto exit_disable_device;
345 pci_set_drvdata(pci_dev, hw);
347 rt2x00dev = hw->priv;
348 rt2x00dev->dev = &pci_dev->dev;
349 rt2x00dev->ops = ops;
351 rt2x00dev->irq = pci_dev->irq;
352 rt2x00dev->name = pci_name(pci_dev);
354 if (pci_dev->is_pcie)
355 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
357 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
359 retval = rt2x00pci_alloc_reg(rt2x00dev);
361 goto exit_free_device;
363 retval = rt2x00lib_probe_dev(rt2x00dev);
370 rt2x00pci_free_reg(rt2x00dev);
373 ieee80211_free_hw(hw);
376 if (retval != -EBUSY)
377 pci_disable_device(pci_dev);
379 exit_release_regions:
380 pci_release_regions(pci_dev);
382 pci_set_drvdata(pci_dev, NULL);
386 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
388 void rt2x00pci_remove(struct pci_dev *pci_dev)
390 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
391 struct rt2x00_dev *rt2x00dev = hw->priv;
394 * Free all allocated data.
396 rt2x00lib_remove_dev(rt2x00dev);
397 rt2x00pci_free_reg(rt2x00dev);
398 ieee80211_free_hw(hw);
401 * Free the PCI device data.
403 pci_set_drvdata(pci_dev, NULL);
404 pci_disable_device(pci_dev);
405 pci_release_regions(pci_dev);
407 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
410 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
412 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
413 struct rt2x00_dev *rt2x00dev = hw->priv;
416 retval = rt2x00lib_suspend(rt2x00dev, state);
420 pci_save_state(pci_dev);
421 pci_disable_device(pci_dev);
422 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
424 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
426 int rt2x00pci_resume(struct pci_dev *pci_dev)
428 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
429 struct rt2x00_dev *rt2x00dev = hw->priv;
431 if (pci_set_power_state(pci_dev, PCI_D0) ||
432 pci_enable_device(pci_dev) ||
433 pci_restore_state(pci_dev)) {
434 ERROR(rt2x00dev, "Failed to resume device.\n");
438 return rt2x00lib_resume(rt2x00dev);
440 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
441 #endif /* CONFIG_PM */
444 * rt2x00pci module information.
446 MODULE_AUTHOR(DRV_PROJECT);
447 MODULE_VERSION(DRV_VERSION);
448 MODULE_DESCRIPTION("rt2x00 pci library");
449 MODULE_LICENSE("GPL");