1 files changed, 363 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath5k/pci.c b/drivers/net/wireless/ath/ath5k/pci.c
new file mode 100644
index 000000000000..f2c0c236392f
--- /dev/null
+++ b/drivers/net/wireless/ath/ath5k/pci.c
@@ -0,0 +1,363 @@
+/*
+ * 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 <linux/etherdevice.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 "unpleasant" 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
+ */
+static 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 false;
+                        *data = (u16)(ath5k_hw_reg_read(ah, AR5K_EEPROM_DATA) &
+                                        0xffff);
+                        return true;
+                }
+                udelay(15);
+        }
+
+        return false;
+}
+
+int ath5k_hw_read_srev(struct ath5k_hw *ah)
+{
+        ah->ah_mac_srev = ath5k_hw_reg_read(ah, AR5K_SREV);
+        return 0;
+}
+
+/*
+ * Read the MAC address from eeprom or platform_data
+ */
+static int ath5k_pci_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
+{
+        u8 mac_d[ETH_ALEN] = {};
+        u32 total, offset;
+        u16 data;
+        int octet;
+
+        AR5K_EEPROM_READ(0x20, data);
+
+        for (offset = 0x1f, octet = 0, total = 0; offset >= 0x1d; offset--) {
+                AR5K_EEPROM_READ(offset, data);
+
+                total += data;
+                mac_d[octet + 1] = data & 0xff;
+                mac_d[octet] = data >> 8;
+                octet += 2;
+        }
+
+        if (!total || total == 3 * 0xffff)
+                return -EINVAL;
+
+        memcpy(mac, mac_d, ETH_ALEN);
+
+        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,
+        .eeprom_read_mac = ath5k_pci_eeprom_read_mac,
+};
+
+/********************\
+* 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 pci_dev *pdev = to_pci_dev(dev);
+        struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+        struct ath5k_softc *sc = hw->priv;
+
+        ath5k_led_off(sc);
+        return 0;
+}
+
+static int ath5k_pci_resume(struct device *dev)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+        struct ath5k_softc *sc = hw->priv;
+
+        /*
+         * 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);