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path: root/drivers/net/wireless/rt2x00/rt2x00pci.c
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Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00pci.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00pci.c481
1 files changed, 481 insertions, 0 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
new file mode 100644
index 00000000000..85629f1999a
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -0,0 +1,481 @@
+/*
+ Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+ <http://rt2x00.serialmonkey.com>
+
+ 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 <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#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;
+ u32 desc;
+ int retval;
+ int signal;
+ int rssi;
+ int ofdm;
+ int size;
+
+ while (1) {
+ entry = rt2x00_get_data_entry(ring);
+ rxd = entry->priv;
+ rt2x00_desc_read(rxd, 0, &desc);
+
+ if (rt2x00_get_field32(desc, RXD_ENTRY_OWNER_NIC))
+ break;
+
+ retval = rt2x00dev->ops->lib->fill_rxdone(entry, &signal,
+ &rssi, &ofdm, &size);
+ if (retval)
+ goto skip_entry;
+
+ /*
+ * Allocate the sk_buffer, initialize it and copy
+ * all data into it.
+ */
+ skb = dev_alloc_skb(size + NET_IP_ALIGN);
+ if (!skb)
+ return;
+
+ skb_reserve(skb, NET_IP_ALIGN);
+ skb_put(skb, size);
+ memcpy(skb->data, entry->data_addr, size);
+
+ /*
+ * Send the frame to rt2x00lib for further processing.
+ */
+ rt2x00lib_rxdone(entry, skb, signal, rssi, ofdm);
+
+skip_entry:
+ if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) {
+ rt2x00_set_field32(&desc, RXD_ENTRY_OWNER_NIC, 1);
+ rt2x00_desc_write(rxd, 0, desc);
+ }
+
+ 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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 09:57:56 +0000