/* Copyright (C) 2004 - 2007 rt2x00 SourceForge Project This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Module: rt2x00pci Abstract: rt2x00 generic pci device routines. */ /* * Set enviroment defines for rt2x00.h */ #define DRV_NAME "rt2x00pci" #include #include #include #include #include "rt2x00.h" #include "rt2x00pci.h" /* * Beacon handlers. */ int rt2x00pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb, struct ieee80211_tx_control *control) { struct rt2x00_dev *rt2x00dev = hw->priv; struct data_ring *ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON); struct data_entry *entry = rt2x00_get_data_entry(ring); /* * Just in case mac80211 doesn't set this correctly, * but we need this queue set for the descriptor * initialization. */ control->queue = IEEE80211_TX_QUEUE_BEACON; /* * Update the beacon entry. */ memcpy(entry->data_addr, skb->data, skb->len); rt2x00lib_write_tx_desc(rt2x00dev, entry->priv, (struct ieee80211_hdr *)skb->data, skb->len, control); /* * Enable beacon generation. */ rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue); return 0; } EXPORT_SYMBOL_GPL(rt2x00pci_beacon_update); /* * TX data handlers. */ int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev, struct data_ring *ring, struct sk_buff *skb, struct ieee80211_tx_control *control) { struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data; struct data_entry *entry = rt2x00_get_data_entry(ring); struct data_desc *txd = entry->priv; u32 word; if (rt2x00_ring_full(ring)) { ieee80211_stop_queue(rt2x00dev->hw, control->queue); return -EINVAL; } rt2x00_desc_read(txd, 0, &word); if (rt2x00_get_field32(word, TXD_ENTRY_OWNER_NIC) || rt2x00_get_field32(word, TXD_ENTRY_VALID)) { ERROR(rt2x00dev, "Arrived at non-free entry in the non-full queue %d.\n" "Please file bug report to %s.\n", control->queue, DRV_PROJECT); ieee80211_stop_queue(rt2x00dev->hw, control->queue); return -EINVAL; } entry->skb = skb; memcpy(&entry->tx_status.control, control, sizeof(*control)); memcpy(entry->data_addr, skb->data, skb->len); rt2x00lib_write_tx_desc(rt2x00dev, txd, ieee80211hdr, skb->len, control); rt2x00_ring_index_inc(ring); if (rt2x00_ring_full(ring)) ieee80211_stop_queue(rt2x00dev->hw, control->queue); return 0; } EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data); /* * RX data handlers. */ void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev) { struct data_ring *ring = rt2x00dev->rx; struct data_entry *entry; struct data_desc *rxd; struct sk_buff *skb; struct ieee80211_hdr *hdr; struct rxdata_entry_desc desc; int header_size; int align; u32 word; while (1) { entry = rt2x00_get_data_entry(ring); rxd = entry->priv; rt2x00_desc_read(rxd, 0, &word); if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC)) break; memset(&desc, 0x00, sizeof(desc)); rt2x00dev->ops->lib->fill_rxdone(entry, &desc); hdr = (struct ieee80211_hdr *)entry->data_addr; header_size = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); /* * The data behind the ieee80211 header must be * aligned on a 4 byte boundary. */ align = NET_IP_ALIGN + (2 * (header_size % 4 == 0)); /* * Allocate the sk_buffer, initialize it and copy * all data into it. */ skb = dev_alloc_skb(desc.size + align); if (!skb) return; skb_reserve(skb, align); memcpy(skb_put(skb, desc.size), entry->data_addr, desc.size); /* * Send the frame to rt2x00lib for further processing. */ rt2x00lib_rxdone(entry, skb, &desc); if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) { rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1); rt2x00_desc_write(rxd, 0, word); } rt2x00_ring_index_inc(ring); } } EXPORT_SYMBOL_GPL(rt2x00pci_rxdone); /* * Device initialization handlers. */ #define priv_offset(__ring, __i) \ ({ \ ring->data_addr + (i * ring->desc_size); \ }) #define data_addr_offset(__ring, __i) \ ({ \ (__ring)->data_addr + \ ((__ring)->stats.limit * (__ring)->desc_size) + \ ((__i) * (__ring)->data_size); \ }) #define data_dma_offset(__ring, __i) \ ({ \ (__ring)->data_dma + \ ((__ring)->stats.limit * (__ring)->desc_size) + \ ((__i) * (__ring)->data_size); \ }) static int rt2x00pci_alloc_dma(struct rt2x00_dev *rt2x00dev, struct data_ring *ring) { unsigned int i; /* * Allocate DMA memory for descriptor and buffer. */ ring->data_addr = pci_alloc_consistent(rt2x00dev_pci(rt2x00dev), rt2x00_get_ring_size(ring), &ring->data_dma); if (!ring->data_addr) return -ENOMEM; /* * Initialize all ring entries to contain valid * addresses. */ for (i = 0; i < ring->stats.limit; i++) { ring->entry[i].priv = priv_offset(ring, i); ring->entry[i].data_addr = data_addr_offset(ring, i); ring->entry[i].data_dma = data_dma_offset(ring, i); } return 0; } static void rt2x00pci_free_dma(struct rt2x00_dev *rt2x00dev, struct data_ring *ring) { if (ring->data_addr) pci_free_consistent(rt2x00dev_pci(rt2x00dev), rt2x00_get_ring_size(ring), ring->data_addr, ring->data_dma); ring->data_addr = NULL; } int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev) { struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev); struct data_ring *ring; int status; /* * Allocate DMA */ ring_for_each(rt2x00dev, ring) { status = rt2x00pci_alloc_dma(rt2x00dev, ring); if (status) goto exit; } /* * Register interrupt handler. */ status = request_irq(pci_dev->irq, rt2x00dev->ops->lib->irq_handler, IRQF_SHARED, pci_name(pci_dev), rt2x00dev); if (status) { ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n", pci_dev->irq, status); return status; } return 0; exit: rt2x00pci_uninitialize(rt2x00dev); return status; } EXPORT_SYMBOL_GPL(rt2x00pci_initialize); void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev) { struct data_ring *ring; /* * Free irq line. */ free_irq(rt2x00dev_pci(rt2x00dev)->irq, rt2x00dev); /* * Free DMA */ ring_for_each(rt2x00dev, ring) rt2x00pci_free_dma(rt2x00dev, ring); } EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize); /* * 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_addr) { iounmap(rt2x00dev->csr_addr); rt2x00dev->csr_addr = NULL; } } static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev) { struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev); rt2x00dev->csr_addr = ioremap(pci_resource_start(pci_dev, 0), pci_resource_len(pci_dev, 0)); if (!rt2x00dev->csr_addr) 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: ERROR_PROBE("Failed to allocate registers.\n"); rt2x00pci_free_reg(rt2x00dev); return -ENOMEM; } int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) { struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data; struct ieee80211_hw *hw; struct rt2x00_dev *rt2x00dev; int retval; retval = pci_request_regions(pci_dev, pci_name(pci_dev)); if (retval) { ERROR_PROBE("PCI request regions failed.\n"); return retval; } retval = pci_enable_device(pci_dev); if (retval) { ERROR_PROBE("Enable device failed.\n"); goto exit_release_regions; } pci_set_master(pci_dev); if (pci_set_mwi(pci_dev)) ERROR_PROBE("MWI not available.\n"); if (pci_set_dma_mask(pci_dev, DMA_64BIT_MASK) && pci_set_dma_mask(pci_dev, DMA_32BIT_MASK)) { ERROR_PROBE("PCI DMA not supported.\n"); retval = -EIO; goto exit_disable_device; } hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); if (!hw) { ERROR_PROBE("Failed to allocate hardware.\n"); retval = -ENOMEM; goto exit_disable_device; } pci_set_drvdata(pci_dev, hw); rt2x00dev = hw->priv; rt2x00dev->dev = pci_dev; rt2x00dev->ops = ops; rt2x00dev->hw = hw; retval = rt2x00pci_alloc_reg(rt2x00dev); if (retval) goto exit_free_device; 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_disable_device: if (retval != -EBUSY) pci_disable_device(pci_dev); exit_release_regions: pci_release_regions(pci_dev); pci_set_drvdata(pci_dev, NULL); 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_set_drvdata(pci_dev, NULL); pci_disable_device(pci_dev); pci_release_regions(pci_dev); } EXPORT_SYMBOL_GPL(rt2x00pci_remove); #ifdef CONFIG_PM int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state) { struct ieee80211_hw *hw = pci_get_drvdata(pci_dev); struct rt2x00_dev *rt2x00dev = hw->priv; int retval; retval = rt2x00lib_suspend(rt2x00dev, state); if (retval) return retval; rt2x00pci_free_reg(rt2x00dev); pci_save_state(pci_dev); pci_disable_device(pci_dev); return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state)); } EXPORT_SYMBOL_GPL(rt2x00pci_suspend); int rt2x00pci_resume(struct pci_dev *pci_dev) { struct ieee80211_hw *hw = pci_get_drvdata(pci_dev); struct rt2x00_dev *rt2x00dev = hw->priv; int retval; if (pci_set_power_state(pci_dev, PCI_D0) || pci_enable_device(pci_dev) || pci_restore_state(pci_dev)) { ERROR(rt2x00dev, "Failed to resume device.\n"); return -EIO; } retval = rt2x00pci_alloc_reg(rt2x00dev); if (retval) return retval; retval = rt2x00lib_resume(rt2x00dev); if (retval) goto exit_free_reg; return 0; exit_free_reg: rt2x00pci_free_reg(rt2x00dev); return retval; } EXPORT_SYMBOL_GPL(rt2x00pci_resume); #endif /* CONFIG_PM */ /* * rt2x00pci module information. */ MODULE_AUTHOR(DRV_PROJECT); MODULE_VERSION(DRV_VERSION); MODULE_DESCRIPTION("rt2x00 library"); MODULE_LICENSE("GPL");