aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/ath/ath9k/pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/pci.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/pci.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
new file mode 100644
index 00000000000..ccdf20a2e9b
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (c) 2008-2009 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/nl80211.h>
+#include <linux/pci.h>
+#include "ath9k.h"
+
+static struct pci_device_id ath_pci_id_table[] __devinitdata = {
+ { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI */
+ { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
+ { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI */
+ { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI */
+ { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
+ { PCI_VDEVICE(ATHEROS, 0x002B) }, /* PCI-E */
+ { 0 }
+};
+
+/* return bus cachesize in 4B word units */
+static void ath_pci_read_cachesize(struct ath_softc *sc, int *csz)
+{
+ u8 u8tmp;
+
+ pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE,
+ (u8 *)&u8tmp);
+ *csz = (int)u8tmp;
+
+ /*
+ * This check was put in to avoid "unplesant" consequences if
+ * the bootrom has not fully initialized all PCI devices.
+ * Sometimes the cache line size register is not set
+ */
+
+ if (*csz == 0)
+ *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */
+}
+
+static void ath_pci_cleanup(struct ath_softc *sc)
+{
+ struct pci_dev *pdev = to_pci_dev(sc->dev);
+
+ pci_iounmap(pdev, sc->mem);
+ pci_disable_device(pdev);
+ pci_release_region(pdev, 0);
+}
+
+static bool ath_pci_eeprom_read(struct ath_hw *ah, u32 off, u16 *data)
+{
+ (void)REG_READ(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S));
+
+ if (!ath9k_hw_wait(ah,
+ AR_EEPROM_STATUS_DATA,
+ AR_EEPROM_STATUS_DATA_BUSY |
+ AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0,
+ AH_WAIT_TIMEOUT)) {
+ return false;
+ }
+
+ *data = MS(REG_READ(ah, AR_EEPROM_STATUS_DATA),
+ AR_EEPROM_STATUS_DATA_VAL);
+
+ return true;
+}
+
+static struct ath_bus_ops ath_pci_bus_ops = {
+ .read_cachesize = ath_pci_read_cachesize,
+ .cleanup = ath_pci_cleanup,
+ .eeprom_read = ath_pci_eeprom_read,
+};
+
+static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ void __iomem *mem;
+ struct ath_wiphy *aphy;
+ struct ath_softc *sc;
+ struct ieee80211_hw *hw;
+ u8 csz;
+ int ret = 0;
+ struct ath_hw *ah;
+
+ if (pci_enable_device(pdev))
+ return -EIO;
+
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+
+ if (ret) {
+ printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
+ goto bad;
+ }
+
+ ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+
+ if (ret) {
+ printk(KERN_ERR "ath9k: 32-bit DMA consistent "
+ "DMA enable failed\n");
+ goto bad;
+ }
+
+ /*
+ * Cache line size is used to size and align various
+ * structures used to communicate with the hardware.
+ */
+ pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
+ if (csz == 0) {
+ /*
+ * Linux 2.4.18 (at least) writes the cache line size
+ * register as a 16-bit wide register which is wrong.
+ * We must have this setup properly for rx buffer
+ * DMA to work so force a reasonable value here if it
+ * comes up zero.
+ */
+ csz = L1_CACHE_BYTES / sizeof(u32);
+ pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
+ }
+ /*
+ * The default setting of latency timer yields poor results,
+ * set it to the value used by other systems. It may be worth
+ * tweaking this setting more.
+ */
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
+
+ pci_set_master(pdev);
+
+ ret = pci_request_region(pdev, 0, "ath9k");
+ if (ret) {
+ dev_err(&pdev->dev, "PCI memory region reserve error\n");
+ ret = -ENODEV;
+ goto bad;
+ }
+
+ mem = pci_iomap(pdev, 0, 0);
+ if (!mem) {
+ printk(KERN_ERR "PCI memory map error\n") ;
+ ret = -EIO;
+ goto bad1;
+ }
+
+ hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) +
+ sizeof(struct ath_softc), &ath9k_ops);
+ if (hw == NULL) {
+ printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
+ goto bad2;
+ }
+
+ SET_IEEE80211_DEV(hw, &pdev->dev);
+ pci_set_drvdata(pdev, hw);
+
+ aphy = hw->priv;
+ sc = (struct ath_softc *) (aphy + 1);
+ aphy->sc = sc;
+ aphy->hw = hw;
+ sc->pri_wiphy = aphy;
+ sc->hw = hw;
+ sc->dev = &pdev->dev;
+ sc->mem = mem;
+ sc->bus_ops = &ath_pci_bus_ops;
+
+ if (ath_attach(id->device, sc) != 0) {
+ ret = -ENODEV;
+ goto bad3;
+ }
+
+ /* setup interrupt service routine */
+
+ if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
+ printk(KERN_ERR "%s: request_irq failed\n",
+ wiphy_name(hw->wiphy));
+ ret = -EIO;
+ goto bad4;
+ }
+
+ sc->irq = pdev->irq;
+
+ ah = sc->sc_ah;
+ printk(KERN_INFO
+ "%s: Atheros AR%s MAC/BB Rev:%x "
+ "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
+ wiphy_name(hw->wiphy),
+ ath_mac_bb_name(ah->hw_version.macVersion),
+ ah->hw_version.macRev,
+ ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)),
+ ah->hw_version.phyRev,
+ (unsigned long)mem, pdev->irq);
+
+ return 0;
+bad4:
+ ath_detach(sc);
+bad3:
+ ieee80211_free_hw(hw);
+bad2:
+ pci_iounmap(pdev, mem);
+bad1:
+ pci_release_region(pdev, 0);
+bad:
+ pci_disable_device(pdev);
+ return ret;
+}
+
+static void ath_pci_remove(struct pci_dev *pdev)
+{
+ struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+ struct ath_wiphy *aphy = hw->priv;
+ struct ath_softc *sc = aphy->sc;
+
+ ath_cleanup(sc);
+}
+
+#ifdef CONFIG_PM
+
+static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+ struct ath_wiphy *aphy = hw->priv;
+ struct ath_softc *sc = aphy->sc;
+
+ ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
+
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return 0;
+}
+
+static int ath_pci_resume(struct pci_dev *pdev)
+{
+ struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+ struct ath_wiphy *aphy = hw->priv;
+ struct ath_softc *sc = aphy->sc;
+ int err;
+
+ err = pci_enable_device(pdev);
+ if (err)
+ return err;
+ pci_restore_state(pdev);
+
+ /* Enable LED */
+ ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
+ AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+ ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
+
+ return 0;
+}
+
+#endif /* CONFIG_PM */
+
+MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
+
+static struct pci_driver ath_pci_driver = {
+ .name = "ath9k",
+ .id_table = ath_pci_id_table,
+ .probe = ath_pci_probe,
+ .remove = ath_pci_remove,
+#ifdef CONFIG_PM
+ .suspend = ath_pci_suspend,
+ .resume = ath_pci_resume,
+#endif /* CONFIG_PM */
+};
+
+int ath_pci_init(void)
+{
+ return pci_register_driver(&ath_pci_driver);
+}
+
+void ath_pci_exit(void)
+{
+ pci_unregister_driver(&ath_pci_driver);
+}