From 23fabc44475a201e1c6a4d95ddb9f56dac602bea Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 26 Jul 2007 20:00:24 +0000 Subject: Add rt2x00-mac80211 snapshot (#1916) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8184 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- package/rt2x00/src/rt2x00pci.c | 407 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 407 insertions(+) create mode 100644 package/rt2x00/src/rt2x00pci.c (limited to 'package/rt2x00/src/rt2x00pci.c') diff --git a/package/rt2x00/src/rt2x00pci.c b/package/rt2x00/src/rt2x00pci.c new file mode 100644 index 0000000000..4156ea36a9 --- /dev/null +++ b/package/rt2x00/src/rt2x00pci.c @@ -0,0 +1,407 @@ +/* + 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. + Supported chipsets: rt2460, rt2560, rt2561, rt2561s & rt2661. + */ + +/* + * Set enviroment defines for rt2x00.h + */ +#define DRV_NAME "rt2x00pci" + +#include +#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 = + rt2x00_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON); + struct data_entry *entry = rt2x00_get_data_entry(ring); + + /* + * Just in case the ieee80211 doesn't set this, + * 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, 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); + +void rt2x00pci_beacondone(struct rt2x00_dev *rt2x00dev, const int queue) +{ + struct data_ring *ring = rt2x00_get_ring(rt2x00dev, queue); + struct data_entry *entry = rt2x00_get_data_entry(ring); + struct sk_buff *skb; + + skb = ieee80211_beacon_get(rt2x00dev->hw, + rt2x00dev->interface.id, &entry->tx_status.control); + if (!skb) + return; + + rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb, + &entry->tx_status.control); + + dev_kfree_skb(skb); +} +EXPORT_SYMBOL_GPL(rt2x00pci_beacondone); + +/* + * 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_AVAILABLE)) { + 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; + } + + memcpy(entry->data_addr, skb->data, skb->len); + rt2x00lib_write_tx_desc(rt2x00dev, entry, txd, ieee80211hdr, + skb->len, control); + memcpy(&entry->tx_status.control, control, sizeof(*control)); + entry->skb = skb; + + 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); + +/* + * 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_ring(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; +} + +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_ring(rt2x00dev, ring); + if (status) + goto exit; + } + + /* + * Register interrupt handler. + */ + status = request_irq(pci_dev->irq, rt2x00dev->ops->lib->irq_handler, + IRQF_SHARED, pci_dev->driver->name, 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) { + 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; + } +} +EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize); + +/* + * PCI driver handlers. + */ +static int rt2x00pci_alloc_csr(struct rt2x00_dev *rt2x00dev) +{ + rt2x00dev->csr_addr = ioremap( + pci_resource_start(rt2x00dev_pci(rt2x00dev), 0), + pci_resource_len(rt2x00dev_pci(rt2x00dev), 0)); + if (!rt2x00dev->csr_addr) { + ERROR(rt2x00dev, "Ioremap failed.\n"); + return -ENOMEM; + } + + return 0; +} + +static void rt2x00pci_free_csr(struct rt2x00_dev *rt2x00dev) +{ + if (rt2x00dev->csr_addr) { + iounmap(rt2x00dev->csr_addr); + rt2x00dev->csr_addr = NULL; + } +} + +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->device = &pci_dev->dev; + rt2x00dev->ops = ops; + rt2x00dev->hw = hw; + + retval = rt2x00pci_alloc_csr(rt2x00dev); + if (retval) + goto exit_free_device; + + retval = rt2x00lib_probe_dev(rt2x00dev); + if (retval) + goto exit_free_csr; + + return 0; + +exit_free_csr: + rt2x00pci_free_csr(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); + 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_csr(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_csr(rt2x00dev); + if (retval) + return retval; + + return rt2x00lib_resume(rt2x00dev); +} +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"); -- cgit v1.2.3