2 * Copyright (c) 2008-2009 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19 #include <linux/nl80211.h>
20 #include <linux/pci.h>
21 #include <linux/pci-aspm.h>
22 #include <linux/etherdevice.h>
23 #include <linux/module.h>
31 static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
32 { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
33 { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
34 { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
35 { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
36 { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
37 { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
38 { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
39 { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
40 { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 compatible */
41 { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 compatible */
42 { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 compatible */
43 { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 compatible */
44 { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 compatible */
45 { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 compatible */
46 { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
47 { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
48 { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
49 { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
50 { PCI_VDEVICE(ATHEROS, 0xff1b) }, /* AR5BXB63 */
53 MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
55 /* return bus cachesize in 4B word units */
56 static void ath5k_pci_read_cachesize(struct ath_common *common, int *csz)
58 struct ath5k_hw *ah = (struct ath5k_hw *) common->priv;
61 pci_read_config_byte(ah->pdev, PCI_CACHE_LINE_SIZE, &u8tmp);
65 * This check was put in to avoid "unpleasant" consequences if
66 * the bootrom has not fully initialized all PCI devices.
67 * Sometimes the cache line size register is not set
71 *csz = L1_CACHE_BYTES >> 2; /* Use the default size */
78 ath5k_pci_eeprom_read(struct ath_common *common, u32 offset, u16 *data)
80 struct ath5k_hw *ah = (struct ath5k_hw *) common->ah;
84 * Initialize EEPROM access
86 if (ah->ah_version == AR5K_AR5210) {
87 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_EEAE);
88 (void)ath5k_hw_reg_read(ah, AR5K_EEPROM_BASE + (4 * offset));
90 ath5k_hw_reg_write(ah, offset, AR5K_EEPROM_BASE);
91 AR5K_REG_ENABLE_BITS(ah, AR5K_EEPROM_CMD,
92 AR5K_EEPROM_CMD_READ);
95 for (timeout = AR5K_TUNE_REGISTER_TIMEOUT; timeout > 0; timeout--) {
96 status = ath5k_hw_reg_read(ah, AR5K_EEPROM_STATUS);
97 if (status & AR5K_EEPROM_STAT_RDDONE) {
98 if (status & AR5K_EEPROM_STAT_RDERR)
100 *data = (u16)(ath5k_hw_reg_read(ah, AR5K_EEPROM_DATA) &
104 usleep_range(15, 20);
110 int ath5k_hw_read_srev(struct ath5k_hw *ah)
112 ah->ah_mac_srev = ath5k_hw_reg_read(ah, AR5K_SREV);
117 * Read the MAC address from eeprom or platform_data
119 static int ath5k_pci_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
121 u8 mac_d[ETH_ALEN] = {};
126 AR5K_EEPROM_READ(0x20, data);
128 for (offset = 0x1f, octet = 0, total = 0; offset >= 0x1d; offset--) {
129 AR5K_EEPROM_READ(offset, data);
132 mac_d[octet + 1] = data & 0xff;
133 mac_d[octet] = data >> 8;
137 if (!total || total == 3 * 0xffff)
140 memcpy(mac, mac_d, ETH_ALEN);
146 /* Common ath_bus_opts structure */
147 static const struct ath_bus_ops ath_pci_bus_ops = {
148 .ath_bus_type = ATH_PCI,
149 .read_cachesize = ath5k_pci_read_cachesize,
150 .eeprom_read = ath5k_pci_eeprom_read,
151 .eeprom_read_mac = ath5k_pci_eeprom_read_mac,
154 /********************\
155 * PCI Initialization *
156 \********************/
159 ath5k_pci_probe(struct pci_dev *pdev,
160 const struct pci_device_id *id)
164 struct ieee80211_hw *hw;
169 * L0s needs to be disabled on all ath5k cards.
171 * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
172 * by default in the future in 2.6.36) this will also mean both L1 and
173 * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
174 * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
175 * though but cannot currently undue the effect of a blacklist, for
176 * details you can read pcie_aspm_sanity_check() and see how it adjusts
177 * the device link capability.
179 * It may be possible in the future to implement some PCI API to allow
180 * drivers to override blacklists for pre 1.1 PCIe but for now it is
181 * best to accept that both L0s and L1 will be disabled completely for
182 * distributions shipping with CONFIG_PCIEASPM rather than having this
183 * issue present. Motivation for adding this new API will be to help
184 * with power consumption for some of these devices.
186 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
188 ret = pci_enable_device(pdev);
190 dev_err(&pdev->dev, "can't enable device\n");
194 /* XXX 32-bit addressing only */
195 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
197 dev_err(&pdev->dev, "32-bit DMA not available\n");
202 * Cache line size is used to size and align various
203 * structures used to communicate with the hardware.
205 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
208 * Linux 2.4.18 (at least) writes the cache line size
209 * register as a 16-bit wide register which is wrong.
210 * We must have this setup properly for rx buffer
211 * DMA to work so force a reasonable value here if it
214 csz = L1_CACHE_BYTES >> 2;
215 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
218 * The default setting of latency timer yields poor results,
219 * set it to the value used by other systems. It may be worth
220 * tweaking this setting more.
222 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
224 /* Enable bus mastering */
225 pci_set_master(pdev);
228 * Disable the RETRY_TIMEOUT register (0x41) to keep
229 * PCI Tx retries from interfering with C3 CPU state.
231 pci_write_config_byte(pdev, 0x41, 0);
233 ret = pci_request_region(pdev, 0, "ath5k");
235 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
239 mem = pci_iomap(pdev, 0, 0);
241 dev_err(&pdev->dev, "cannot remap PCI memory region\n");
247 * Allocate hw (mac80211 main struct)
248 * and hw->priv (driver private data)
250 hw = ieee80211_alloc_hw(sizeof(*ah), &ath5k_hw_ops);
252 dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
257 dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
262 ah->dev = &pdev->dev;
264 ah->devid = id->device;
265 ah->iobase = mem; /* So we can unmap it on detach */
268 ret = ath5k_init_ah(ah, &ath_pci_bus_ops);
272 /* Set private data */
273 pci_set_drvdata(pdev, hw);
277 ieee80211_free_hw(hw);
279 pci_iounmap(pdev, mem);
281 pci_release_region(pdev, 0);
283 pci_disable_device(pdev);
289 ath5k_pci_remove(struct pci_dev *pdev)
291 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
292 struct ath5k_hw *ah = hw->priv;
295 pci_iounmap(pdev, ah->iobase);
296 pci_release_region(pdev, 0);
297 pci_disable_device(pdev);
298 ieee80211_free_hw(hw);
301 #ifdef CONFIG_PM_SLEEP
302 static int ath5k_pci_suspend(struct device *dev)
304 struct pci_dev *pdev = to_pci_dev(dev);
305 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
306 struct ath5k_hw *ah = hw->priv;
312 static int ath5k_pci_resume(struct device *dev)
314 struct pci_dev *pdev = to_pci_dev(dev);
315 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
316 struct ath5k_hw *ah = hw->priv;
319 * Suspend/Resume resets the PCI configuration space, so we have to
320 * re-disable the RETRY_TIMEOUT register (0x41) to keep
321 * PCI Tx retries from interfering with C3 CPU state
323 pci_write_config_byte(pdev, 0x41, 0);
325 ath5k_led_enable(ah);
329 static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
330 #define ATH5K_PM_OPS (&ath5k_pm_ops)
332 #define ATH5K_PM_OPS NULL
333 #endif /* CONFIG_PM_SLEEP */
335 static struct pci_driver ath5k_pci_driver = {
336 .name = KBUILD_MODNAME,
337 .id_table = ath5k_pci_id_table,
338 .probe = ath5k_pci_probe,
339 .remove = ath5k_pci_remove,
340 .driver.pm = ATH5K_PM_OPS,
343 module_pci_driver(ath5k_pci_driver);