--- /dev/null
+/*
+ * 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 <linux/pci-aspm.h>
+#include "../ath.h"
+#include "ath5k.h"
+#include "debug.h"
+#include "base.h"
+#include "reg.h"
+
+/* Known PCI ids */
+static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
+ { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
+ { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
+ { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
+ { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
+ { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
+ { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
+ { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
+ { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
+ { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
+ { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
+ { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
+ { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
+
+/* return bus cachesize in 4B word units */
+static void ath5k_pci_read_cachesize(struct ath_common *common, int *csz)
+{
+ struct ath5k_softc *sc = (struct ath5k_softc *) common->priv;
+ u8 u8tmp;
+
+ pci_read_config_byte(sc->pdev, PCI_CACHE_LINE_SIZE, &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 = L1_CACHE_BYTES >> 2; /* Use the default size */
+}
+
+/*
+ * Read from eeprom
+ */
+bool ath5k_pci_eeprom_read(struct ath_common *common, u32 offset, u16 *data)
+{
+ struct ath5k_hw *ah = (struct ath5k_hw *) common->ah;
+ u32 status, timeout;
+
+ /*
+ * Initialize EEPROM access
+ */
+ if (ah->ah_version == AR5K_AR5210) {
+ AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_EEAE);
+ (void)ath5k_hw_reg_read(ah, AR5K_EEPROM_BASE + (4 * offset));
+ } else {
+ ath5k_hw_reg_write(ah, offset, AR5K_EEPROM_BASE);
+ AR5K_REG_ENABLE_BITS(ah, AR5K_EEPROM_CMD,
+ AR5K_EEPROM_CMD_READ);
+ }
+
+ for (timeout = AR5K_TUNE_REGISTER_TIMEOUT; timeout > 0; timeout--) {
+ status = ath5k_hw_reg_read(ah, AR5K_EEPROM_STATUS);
+ if (status & AR5K_EEPROM_STAT_RDDONE) {
+ if (status & AR5K_EEPROM_STAT_RDERR)
+ return -EIO;
+ *data = (u16)(ath5k_hw_reg_read(ah, AR5K_EEPROM_DATA) &
+ 0xffff);
+ return 0;
+ }
+ udelay(15);
+ }
+
+ return -ETIMEDOUT;
+}
+
+int ath5k_hw_read_srev(struct ath5k_hw *ah)
+{
+ ah->ah_mac_srev = ath5k_hw_reg_read(ah, AR5K_SREV);
+ return 0;
+}
+
+/* Common ath_bus_opts structure */
+static const struct ath_bus_ops ath_pci_bus_ops = {
+ .ath_bus_type = ATH_PCI,
+ .read_cachesize = ath5k_pci_read_cachesize,
+ .eeprom_read = ath5k_pci_eeprom_read,
+};
+
+/********************\
+* PCI Initialization *
+\********************/
+
+static int __devinit
+ath5k_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ void __iomem *mem;
+ struct ath5k_softc *sc;
+ struct ieee80211_hw *hw;
+ int ret;
+ u8 csz;
+
+ /*
+ * L0s needs to be disabled on all ath5k cards.
+ *
+ * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
+ * by default in the future in 2.6.36) this will also mean both L1 and
+ * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
+ * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
+ * though but cannot currently undue the effect of a blacklist, for
+ * details you can read pcie_aspm_sanity_check() and see how it adjusts
+ * the device link capability.
+ *
+ * It may be possible in the future to implement some PCI API to allow
+ * drivers to override blacklists for pre 1.1 PCIe but for now it is
+ * best to accept that both L0s and L1 will be disabled completely for
+ * distributions shipping with CONFIG_PCIEASPM rather than having this
+ * issue present. Motivation for adding this new API will be to help
+ * with power consumption for some of these devices.
+ */
+ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "can't enable device\n");
+ goto err;
+ }
+
+ /* XXX 32-bit addressing only */
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(&pdev->dev, "32-bit DMA not available\n");
+ goto err_dis;
+ }
+
+ /*
+ * 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 >> 2;
+ 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);
+
+ /* Enable bus mastering */
+ pci_set_master(pdev);
+
+ /*
+ * Disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state.
+ */
+ pci_write_config_byte(pdev, 0x41, 0);
+
+ ret = pci_request_region(pdev, 0, "ath5k");
+ if (ret) {
+ dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
+ goto err_dis;
+ }
+
+ mem = pci_iomap(pdev, 0, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
+ ret = -EIO;
+ goto err_reg;
+ }
+
+ /*
+ * Allocate hw (mac80211 main struct)
+ * and hw->priv (driver private data)
+ */
+ hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
+ if (hw == NULL) {
+ dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
+ ret = -ENOMEM;
+ goto err_map;
+ }
+
+ dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
+
+ sc = hw->priv;
+ sc->hw = hw;
+ sc->pdev = pdev;
+ sc->dev = &pdev->dev;
+ sc->irq = pdev->irq;
+ sc->devid = id->device;
+ sc->iobase = mem; /* So we can unmap it on detach */
+
+ /* Initialize */
+ ret = ath5k_init_softc(sc, &ath_pci_bus_ops);
+ if (ret)
+ goto err_free;
+
+ /* Set private data */
+ pci_set_drvdata(pdev, hw);
+
+ return 0;
+err_free:
+ ieee80211_free_hw(hw);
+err_map:
+ pci_iounmap(pdev, mem);
+err_reg:
+ pci_release_region(pdev, 0);
+err_dis:
+ pci_disable_device(pdev);
+err:
+ return ret;
+}
+
+static void __devexit
+ath5k_pci_remove(struct pci_dev *pdev)
+{
+ struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+ struct ath5k_softc *sc = hw->priv;
+
+ ath5k_deinit_softc(sc);
+ pci_iounmap(pdev, sc->iobase);
+ pci_release_region(pdev, 0);
+ pci_disable_device(pdev);
+ ieee80211_free_hw(hw);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ath5k_pci_suspend(struct device *dev)
+{
+ struct ath5k_softc *sc = pci_get_drvdata(to_pci_dev(dev));
+
+ ath5k_led_off(sc);
+ return 0;
+}
+
+static int ath5k_pci_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct ath5k_softc *sc = pci_get_drvdata(pdev);
+
+ /*
+ * Suspend/Resume resets the PCI configuration space, so we have to
+ * re-disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state
+ */
+ pci_write_config_byte(pdev, 0x41, 0);
+
+ ath5k_led_enable(sc);
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
+#define ATH5K_PM_OPS (&ath5k_pm_ops)
+#else
+#define ATH5K_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static struct pci_driver ath5k_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = ath5k_pci_id_table,
+ .probe = ath5k_pci_probe,
+ .remove = __devexit_p(ath5k_pci_remove),
+ .driver.pm = ATH5K_PM_OPS,
+};
+
+/*
+ * Module init/exit functions
+ */
+static int __init
+init_ath5k_pci(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&ath5k_pci_driver);
+ if (ret) {
+ printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void __exit
+exit_ath5k_pci(void)
+{
+ pci_unregister_driver(&ath5k_pci_driver);
+}
+
+module_init(init_ath5k_pci);
+module_exit(exit_ath5k_pci);
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