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
);
63 void rt2x00pci_rxdone(struct rt2x00_dev
*rt2x00dev
)
65 struct data_queue
*queue
= rt2x00dev
->rx
;
66 struct queue_entry
*entry
;
67 struct queue_entry_priv_pci
*entry_priv
;
68 struct skb_frame_desc
*skbdesc
;
71 entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
72 entry_priv
= entry
->priv_data
;
74 if (rt2x00dev
->ops
->lib
->get_entry_state(entry
))
78 * Fill in desc fields of the skb descriptor
80 skbdesc
= get_skb_frame_desc(entry
->skb
);
81 skbdesc
->desc
= entry_priv
->desc
;
82 skbdesc
->desc_len
= entry
->queue
->desc_size
;
85 * Send the frame to rt2x00lib for further processing.
87 rt2x00lib_rxdone(rt2x00dev
, entry
);
90 EXPORT_SYMBOL_GPL(rt2x00pci_rxdone
);
93 * Device initialization handlers.
95 static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev
*rt2x00dev
,
96 struct data_queue
*queue
)
98 struct queue_entry_priv_pci
*entry_priv
;
104 * Allocate DMA memory for descriptor and buffer.
106 addr
= dma_alloc_coherent(rt2x00dev
->dev
,
107 queue
->limit
* queue
->desc_size
,
108 &dma
, GFP_KERNEL
| GFP_DMA
);
112 memset(addr
, 0, queue
->limit
* queue
->desc_size
);
115 * Initialize all queue entries to contain valid addresses.
117 for (i
= 0; i
< queue
->limit
; i
++) {
118 entry_priv
= queue
->entries
[i
].priv_data
;
119 entry_priv
->desc
= addr
+ i
* queue
->desc_size
;
120 entry_priv
->desc_dma
= dma
+ i
* queue
->desc_size
;
126 static void rt2x00pci_free_queue_dma(struct rt2x00_dev
*rt2x00dev
,
127 struct data_queue
*queue
)
129 struct queue_entry_priv_pci
*entry_priv
=
130 queue
->entries
[0].priv_data
;
132 if (entry_priv
->desc
)
133 dma_free_coherent(rt2x00dev
->dev
,
134 queue
->limit
* queue
->desc_size
,
135 entry_priv
->desc
, entry_priv
->desc_dma
);
136 entry_priv
->desc
= NULL
;
139 int rt2x00pci_initialize(struct rt2x00_dev
*rt2x00dev
)
141 struct data_queue
*queue
;
147 queue_for_each(rt2x00dev
, queue
) {
148 status
= rt2x00pci_alloc_queue_dma(rt2x00dev
, queue
);
154 * Register interrupt handler.
156 status
= request_threaded_irq(rt2x00dev
->irq
,
157 rt2x00dev
->ops
->lib
->irq_handler
,
158 rt2x00dev
->ops
->lib
->irq_handler_thread
,
159 IRQF_SHARED
, rt2x00dev
->name
, rt2x00dev
);
161 ERROR(rt2x00dev
, "IRQ %d allocation failed (error %d).\n",
162 rt2x00dev
->irq
, status
);
169 queue_for_each(rt2x00dev
, queue
)
170 rt2x00pci_free_queue_dma(rt2x00dev
, queue
);
174 EXPORT_SYMBOL_GPL(rt2x00pci_initialize
);
176 void rt2x00pci_uninitialize(struct rt2x00_dev
*rt2x00dev
)
178 struct data_queue
*queue
;
183 free_irq(rt2x00dev
->irq
, rt2x00dev
);
188 queue_for_each(rt2x00dev
, queue
)
189 rt2x00pci_free_queue_dma(rt2x00dev
, queue
);
191 EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize
);
194 * PCI driver handlers.
196 static void rt2x00pci_free_reg(struct rt2x00_dev
*rt2x00dev
)
198 kfree(rt2x00dev
->rf
);
199 rt2x00dev
->rf
= NULL
;
201 kfree(rt2x00dev
->eeprom
);
202 rt2x00dev
->eeprom
= NULL
;
204 if (rt2x00dev
->csr
.base
) {
205 iounmap(rt2x00dev
->csr
.base
);
206 rt2x00dev
->csr
.base
= NULL
;
210 static int rt2x00pci_alloc_reg(struct rt2x00_dev
*rt2x00dev
)
212 struct pci_dev
*pci_dev
= to_pci_dev(rt2x00dev
->dev
);
214 rt2x00dev
->csr
.base
= pci_ioremap_bar(pci_dev
, 0);
215 if (!rt2x00dev
->csr
.base
)
218 rt2x00dev
->eeprom
= kzalloc(rt2x00dev
->ops
->eeprom_size
, GFP_KERNEL
);
219 if (!rt2x00dev
->eeprom
)
222 rt2x00dev
->rf
= kzalloc(rt2x00dev
->ops
->rf_size
, GFP_KERNEL
);
229 ERROR_PROBE("Failed to allocate registers.\n");
231 rt2x00pci_free_reg(rt2x00dev
);
236 int rt2x00pci_probe(struct pci_dev
*pci_dev
, const struct pci_device_id
*id
)
238 struct rt2x00_ops
*ops
= (struct rt2x00_ops
*)id
->driver_data
;
239 struct ieee80211_hw
*hw
;
240 struct rt2x00_dev
*rt2x00dev
;
243 retval
= pci_enable_device(pci_dev
);
245 ERROR_PROBE("Enable device failed.\n");
249 retval
= pci_request_regions(pci_dev
, pci_name(pci_dev
));
251 ERROR_PROBE("PCI request regions failed.\n");
252 goto exit_disable_device
;
255 pci_set_master(pci_dev
);
257 if (pci_set_mwi(pci_dev
))
258 ERROR_PROBE("MWI not available.\n");
260 if (dma_set_mask(&pci_dev
->dev
, DMA_BIT_MASK(32))) {
261 ERROR_PROBE("PCI DMA not supported.\n");
263 goto exit_release_regions
;
266 hw
= ieee80211_alloc_hw(sizeof(struct rt2x00_dev
), ops
->hw
);
268 ERROR_PROBE("Failed to allocate hardware.\n");
270 goto exit_release_regions
;
273 pci_set_drvdata(pci_dev
, hw
);
275 rt2x00dev
= hw
->priv
;
276 rt2x00dev
->dev
= &pci_dev
->dev
;
277 rt2x00dev
->ops
= ops
;
279 rt2x00dev
->irq
= pci_dev
->irq
;
280 rt2x00dev
->name
= pci_name(pci_dev
);
282 if (pci_dev
->is_pcie
)
283 rt2x00_set_chip_intf(rt2x00dev
, RT2X00_CHIP_INTF_PCIE
);
285 rt2x00_set_chip_intf(rt2x00dev
, RT2X00_CHIP_INTF_PCI
);
287 retval
= rt2x00pci_alloc_reg(rt2x00dev
);
289 goto exit_free_device
;
291 retval
= rt2x00lib_probe_dev(rt2x00dev
);
298 rt2x00pci_free_reg(rt2x00dev
);
301 ieee80211_free_hw(hw
);
303 exit_release_regions
:
304 pci_release_regions(pci_dev
);
307 pci_disable_device(pci_dev
);
309 pci_set_drvdata(pci_dev
, NULL
);
313 EXPORT_SYMBOL_GPL(rt2x00pci_probe
);
315 void rt2x00pci_remove(struct pci_dev
*pci_dev
)
317 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
318 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
321 * Free all allocated data.
323 rt2x00lib_remove_dev(rt2x00dev
);
324 rt2x00pci_free_reg(rt2x00dev
);
325 ieee80211_free_hw(hw
);
328 * Free the PCI device data.
330 pci_set_drvdata(pci_dev
, NULL
);
331 pci_disable_device(pci_dev
);
332 pci_release_regions(pci_dev
);
334 EXPORT_SYMBOL_GPL(rt2x00pci_remove
);
337 int rt2x00pci_suspend(struct pci_dev
*pci_dev
, pm_message_t state
)
339 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
340 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
343 retval
= rt2x00lib_suspend(rt2x00dev
, state
);
347 pci_save_state(pci_dev
);
348 pci_disable_device(pci_dev
);
349 return pci_set_power_state(pci_dev
, pci_choose_state(pci_dev
, state
));
351 EXPORT_SYMBOL_GPL(rt2x00pci_suspend
);
353 int rt2x00pci_resume(struct pci_dev
*pci_dev
)
355 struct ieee80211_hw
*hw
= pci_get_drvdata(pci_dev
);
356 struct rt2x00_dev
*rt2x00dev
= hw
->priv
;
358 if (pci_set_power_state(pci_dev
, PCI_D0
) ||
359 pci_enable_device(pci_dev
) ||
360 pci_restore_state(pci_dev
)) {
361 ERROR(rt2x00dev
, "Failed to resume device.\n");
365 return rt2x00lib_resume(rt2x00dev
);
367 EXPORT_SYMBOL_GPL(rt2x00pci_resume
);
368 #endif /* CONFIG_PM */
371 * rt2x00pci module information.
373 MODULE_AUTHOR(DRV_PROJECT
);
374 MODULE_VERSION(DRV_VERSION
);
375 MODULE_DESCRIPTION("rt2x00 pci library");
376 MODULE_LICENSE("GPL");