/* * 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 #include #include #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 } }; /* 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 */ } /* 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, }; /********************\ * 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);