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>
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 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
47 for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
48 rt2x00pci_register_read(rt2x00dev, offset, reg);
49 if (!rt2x00_get_field32(*reg, field))
51 udelay(REGISTER_BUSY_DELAY);
54 ERROR(rt2x00dev, "Indirect register access failed: "
55 "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
60 EXPORT_SYMBOL_GPL(rt2x00pci_regbusy_read);
65 int rt2x00pci_write_tx_data(struct queue_entry *entry)
67 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
68 struct queue_entry_priv_pci *entry_priv = entry->priv_data;
69 struct skb_frame_desc *skbdesc;
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 * Fill in skb descriptor
87 skbdesc = get_skb_frame_desc(entry->skb);
88 skbdesc->desc = entry_priv->desc;
89 skbdesc->desc_len = entry->queue->desc_size;
93 EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
96 * TX/RX data handlers.
98 void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
100 struct data_queue *queue = rt2x00dev->rx;
101 struct queue_entry *entry;
102 struct queue_entry_priv_pci *entry_priv;
103 struct skb_frame_desc *skbdesc;
106 entry = rt2x00queue_get_entry(queue, Q_INDEX);
107 entry_priv = entry->priv_data;
109 if (rt2x00dev->ops->lib->get_entry_state(entry))
113 * Fill in desc fields of the skb descriptor
115 skbdesc = get_skb_frame_desc(entry->skb);
116 skbdesc->desc = entry_priv->desc;
117 skbdesc->desc_len = entry->queue->desc_size;
120 * Send the frame to rt2x00lib for further processing.
122 rt2x00lib_rxdone(rt2x00dev, entry);
125 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
128 * Device initialization handlers.
130 static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
131 struct data_queue *queue)
133 struct queue_entry_priv_pci *entry_priv;
139 * Allocate DMA memory for descriptor and buffer.
141 addr = dma_alloc_coherent(rt2x00dev->dev,
142 queue->limit * queue->desc_size,
143 &dma, GFP_KERNEL | GFP_DMA);
147 memset(addr, 0, queue->limit * queue->desc_size);
150 * Initialize all queue entries to contain valid addresses.
152 for (i = 0; i < queue->limit; i++) {
153 entry_priv = queue->entries[i].priv_data;
154 entry_priv->desc = addr + i * queue->desc_size;
155 entry_priv->desc_dma = dma + i * queue->desc_size;
161 static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
162 struct data_queue *queue)
164 struct queue_entry_priv_pci *entry_priv =
165 queue->entries[0].priv_data;
167 if (entry_priv->desc)
168 dma_free_coherent(rt2x00dev->dev,
169 queue->limit * queue->desc_size,
170 entry_priv->desc, entry_priv->desc_dma);
171 entry_priv->desc = NULL;
174 int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
176 struct data_queue *queue;
182 queue_for_each(rt2x00dev, queue) {
183 status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
189 * Register interrupt handler.
191 status = request_irq(rt2x00dev->irq, rt2x00dev->ops->lib->irq_handler,
192 IRQF_SHARED, rt2x00dev->name, rt2x00dev);
194 ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
195 rt2x00dev->irq, status);
202 queue_for_each(rt2x00dev, queue)
203 rt2x00pci_free_queue_dma(rt2x00dev, queue);
207 EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
209 void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
211 struct data_queue *queue;
216 free_irq(to_pci_dev(rt2x00dev->dev)->irq, rt2x00dev);
221 queue_for_each(rt2x00dev, queue)
222 rt2x00pci_free_queue_dma(rt2x00dev, queue);
224 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
227 * PCI driver handlers.
229 static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
231 kfree(rt2x00dev->rf);
232 rt2x00dev->rf = NULL;
234 kfree(rt2x00dev->eeprom);
235 rt2x00dev->eeprom = NULL;
237 if (rt2x00dev->csr.base) {
238 iounmap(rt2x00dev->csr.base);
239 rt2x00dev->csr.base = NULL;
243 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
245 struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
247 rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
248 if (!rt2x00dev->csr.base)
251 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
252 if (!rt2x00dev->eeprom)
255 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
262 ERROR_PROBE("Failed to allocate registers.\n");
264 rt2x00pci_free_reg(rt2x00dev);
269 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
271 struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data;
272 struct ieee80211_hw *hw;
273 struct rt2x00_dev *rt2x00dev;
276 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
278 ERROR_PROBE("PCI request regions failed.\n");
282 retval = pci_enable_device(pci_dev);
284 ERROR_PROBE("Enable device failed.\n");
285 goto exit_release_regions;
288 pci_set_master(pci_dev);
290 if (pci_set_mwi(pci_dev))
291 ERROR_PROBE("MWI not available.\n");
293 if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
294 ERROR_PROBE("PCI DMA not supported.\n");
296 goto exit_disable_device;
299 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
301 ERROR_PROBE("Failed to allocate hardware.\n");
303 goto exit_disable_device;
306 pci_set_drvdata(pci_dev, hw);
308 rt2x00dev = hw->priv;
309 rt2x00dev->dev = &pci_dev->dev;
310 rt2x00dev->ops = ops;
312 rt2x00dev->irq = pci_dev->irq;
313 rt2x00dev->name = pci_name(pci_dev);
315 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
317 retval = rt2x00pci_alloc_reg(rt2x00dev);
319 goto exit_free_device;
321 retval = rt2x00lib_probe_dev(rt2x00dev);
328 rt2x00pci_free_reg(rt2x00dev);
331 ieee80211_free_hw(hw);
334 if (retval != -EBUSY)
335 pci_disable_device(pci_dev);
337 exit_release_regions:
338 pci_release_regions(pci_dev);
340 pci_set_drvdata(pci_dev, NULL);
344 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
346 void rt2x00pci_remove(struct pci_dev *pci_dev)
348 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
349 struct rt2x00_dev *rt2x00dev = hw->priv;
352 * Free all allocated data.
354 rt2x00lib_remove_dev(rt2x00dev);
355 rt2x00pci_free_reg(rt2x00dev);
356 ieee80211_free_hw(hw);
359 * Free the PCI device data.
361 pci_set_drvdata(pci_dev, NULL);
362 pci_disable_device(pci_dev);
363 pci_release_regions(pci_dev);
365 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
368 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
370 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
371 struct rt2x00_dev *rt2x00dev = hw->priv;
374 retval = rt2x00lib_suspend(rt2x00dev, state);
378 pci_save_state(pci_dev);
379 pci_disable_device(pci_dev);
380 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
382 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
384 int rt2x00pci_resume(struct pci_dev *pci_dev)
386 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
387 struct rt2x00_dev *rt2x00dev = hw->priv;
389 if (pci_set_power_state(pci_dev, PCI_D0) ||
390 pci_enable_device(pci_dev) ||
391 pci_restore_state(pci_dev)) {
392 ERROR(rt2x00dev, "Failed to resume device.\n");
396 return rt2x00lib_resume(rt2x00dev);
398 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
399 #endif /* CONFIG_PM */
402 * rt2x00pci module information.
404 MODULE_AUTHOR(DRV_PROJECT);
405 MODULE_VERSION(DRV_VERSION);
406 MODULE_DESCRIPTION("rt2x00 pci library");
407 MODULE_LICENSE("GPL");