diff options
Diffstat (limited to 'drivers/net/wireless/ralink/rt2x00/rt2x00pci.c')
| -rw-r--r-- | drivers/net/wireless/ralink/rt2x00/rt2x00pci.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00pci.c b/drivers/net/wireless/ralink/rt2x00/rt2x00pci.c new file mode 100644 index 000000000..cabeef0dd --- /dev/null +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00pci.c @@ -0,0 +1,197 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> + <http://rt2x00.serialmonkey.com> + + */ + +/* + Module: rt2x00pci + Abstract: rt2x00 generic pci device routines. + */ + +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/slab.h> + +#include "rt2x00.h" +#include "rt2x00pci.h" + +/* + * PCI driver handlers. + */ +static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev) +{ + kfree(rt2x00dev->rf); + rt2x00dev->rf = NULL; + + kfree(rt2x00dev->eeprom); + rt2x00dev->eeprom = NULL; + + if (rt2x00dev->csr.base) { + iounmap(rt2x00dev->csr.base); + rt2x00dev->csr.base = NULL; + } +} + +static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev) +{ + struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev); + + rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0); + if (!rt2x00dev->csr.base) + goto exit; + + rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); + if (!rt2x00dev->eeprom) + goto exit; + + rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); + if (!rt2x00dev->rf) + goto exit; + + return 0; + +exit: + rt2x00_probe_err("Failed to allocate registers\n"); + + rt2x00pci_free_reg(rt2x00dev); + + return -ENOMEM; +} + +int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops) +{ + struct ieee80211_hw *hw; + struct rt2x00_dev *rt2x00dev; + int retval; + u16 chip; + + retval = pci_enable_device(pci_dev); + if (retval) { + rt2x00_probe_err("Enable device failed\n"); + return retval; + } + + retval = pci_request_regions(pci_dev, pci_name(pci_dev)); + if (retval) { + rt2x00_probe_err("PCI request regions failed\n"); + goto exit_disable_device; + } + + pci_set_master(pci_dev); + + if (pci_set_mwi(pci_dev)) + rt2x00_probe_err("MWI not available\n"); + + if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) { + rt2x00_probe_err("PCI DMA not supported\n"); + retval = -EIO; + goto exit_release_regions; + } + + hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); + if (!hw) { + rt2x00_probe_err("Failed to allocate hardware\n"); + retval = -ENOMEM; + goto exit_release_regions; + } + + pci_set_drvdata(pci_dev, hw); + + rt2x00dev = hw->priv; + rt2x00dev->dev = &pci_dev->dev; + rt2x00dev->ops = ops; + rt2x00dev->hw = hw; + rt2x00dev->irq = pci_dev->irq; + rt2x00dev->name = ops->name; + + if (pci_is_pcie(pci_dev)) + rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE); + else + rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI); + + retval = rt2x00pci_alloc_reg(rt2x00dev); + if (retval) + goto exit_free_device; + + /* + * Because rt3290 chip use different efuse offset to read efuse data. + * So before read efuse it need to indicate it is the + * rt3290 or not. + */ + pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip); + rt2x00dev->chip.rt = chip; + + retval = rt2x00lib_probe_dev(rt2x00dev); + if (retval) + goto exit_free_reg; + + return 0; + +exit_free_reg: + rt2x00pci_free_reg(rt2x00dev); + +exit_free_device: + ieee80211_free_hw(hw); + +exit_release_regions: + pci_clear_mwi(pci_dev); + pci_release_regions(pci_dev); + +exit_disable_device: + pci_disable_device(pci_dev); + + return retval; +} +EXPORT_SYMBOL_GPL(rt2x00pci_probe); + +void rt2x00pci_remove(struct pci_dev *pci_dev) +{ + struct ieee80211_hw *hw = pci_get_drvdata(pci_dev); + struct rt2x00_dev *rt2x00dev = hw->priv; + + /* + * Free all allocated data. + */ + rt2x00lib_remove_dev(rt2x00dev); + rt2x00pci_free_reg(rt2x00dev); + ieee80211_free_hw(hw); + + /* + * Free the PCI device data. + */ + pci_clear_mwi(pci_dev); + pci_disable_device(pci_dev); + pci_release_regions(pci_dev); +} +EXPORT_SYMBOL_GPL(rt2x00pci_remove); + +static int __maybe_unused rt2x00pci_suspend(struct device *dev) +{ + struct ieee80211_hw *hw = dev_get_drvdata(dev); + struct rt2x00_dev *rt2x00dev = hw->priv; + + return rt2x00lib_suspend(rt2x00dev); +} + +static int __maybe_unused rt2x00pci_resume(struct device *dev) +{ + struct ieee80211_hw *hw = dev_get_drvdata(dev); + struct rt2x00_dev *rt2x00dev = hw->priv; + + return rt2x00lib_resume(rt2x00dev); +} + +SIMPLE_DEV_PM_OPS(rt2x00pci_pm_ops, rt2x00pci_suspend, rt2x00pci_resume); +EXPORT_SYMBOL_GPL(rt2x00pci_pm_ops); + +/* + * rt2x00pci module information. + */ +MODULE_AUTHOR(DRV_PROJECT); +MODULE_VERSION(DRV_VERSION); +MODULE_DESCRIPTION("rt2x00 pci library"); +MODULE_LICENSE("GPL"); |