1 files changed, 409 insertions, 0 deletions
diff --git a/linux/drivers/net/wireless/rt2x00/rt2x00pci.c b/linux/drivers/net/wireless/rt2x00/rt2x00pci.c
new file mode 100644
index 000000000..cdd5154bd
--- /dev/null
+++ b/linux/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -0,0 +1,409 @@
+/*
+	Copyright (C) 2004 - 2009 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.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "rt2x00.h"
+#include "rt2x00pci.h"
+
+/*
+ * Register access.
+ */
+int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
+			   const unsigned int offset,
+			   const struct rt2x00_field32 field,
+			   u32 *reg)
+{
+	unsigned int i;
+
+	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+		rt2x00pci_register_read(rt2x00dev, offset, reg);
+		if (!rt2x00_get_field32(*reg, field))
+			return 1;
+		udelay(REGISTER_BUSY_DELAY);
+	}
+
+	ERROR(rt2x00dev, "Indirect register access failed: "
+	      "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
+	*reg = ~0;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_regbusy_read);
+
+/*
+ * TX data handlers.
+ */
+int rt2x00pci_write_tx_data(struct queue_entry *entry)
+{
+	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+	struct queue_entry_priv_pci *entry_priv = entry->priv_data;
+	struct skb_frame_desc *skbdesc;
+
+	/*
+	 * This should not happen, we already checked the entry
+	 * was ours. When the hardware disagrees there has been
+	 * a queue corruption!
+	 */
+	if (unlikely(rt2x00dev->ops->lib->get_entry_state(entry))) {
+		ERROR(rt2x00dev,
+		      "Corrupt queue %d, accessing entry which is not ours.\n"
+		      "Please file bug report to %s.\n",
+		      entry->queue->qid, DRV_PROJECT);
+		return -EINVAL;
+	}
+
+	/*
+	 * Fill in skb descriptor
+	 */
+	skbdesc = get_skb_frame_desc(entry->skb);
+	skbdesc->desc = entry_priv->desc;
+	skbdesc->desc_len = entry->queue->desc_size;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
+
+/*
+ * TX/RX data handlers.
+ */
+void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
+{
+	struct data_queue *queue = rt2x00dev->rx;
+	struct queue_entry *entry;
+	struct queue_entry_priv_pci *entry_priv;
+	struct skb_frame_desc *skbdesc;
+
+	while (1) {
+		entry = rt2x00queue_get_entry(queue, Q_INDEX);
+		entry_priv = entry->priv_data;
+
+		if (rt2x00dev->ops->lib->get_entry_state(entry))
+			break;
+
+		/*
+		 * Fill in desc fields of the skb descriptor
+		 */
+		skbdesc = get_skb_frame_desc(entry->skb);
+		skbdesc->desc = entry_priv->desc;
+		skbdesc->desc_len = entry->queue->desc_size;
+
+		/*
+		 * Send the frame to rt2x00lib for further processing.
+		 */
+		rt2x00lib_rxdone(rt2x00dev, entry);
+	}
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
+
+/*
+ * Device initialization handlers.
+ */
+static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
+				     struct data_queue *queue)
+{
+	struct queue_entry_priv_pci *entry_priv;
+	void *addr;
+	dma_addr_t dma;
+	unsigned int i;
+
+	/*
+	 * Allocate DMA memory for descriptor and buffer.
+	 */
+	addr = dma_alloc_coherent(rt2x00dev->dev,
+				  queue->limit * queue->desc_size,
+				  &dma, GFP_KERNEL | GFP_DMA);
+	if (!addr)
+		return -ENOMEM;
+
+	memset(addr, 0, queue->limit * queue->desc_size);
+
+	/*
+	 * Initialize all queue entries to contain valid addresses.
+	 */
+	for (i = 0; i < queue->limit; i++) {
+		entry_priv = queue->entries[i].priv_data;
+		entry_priv->desc = addr + i * queue->desc_size;
+		entry_priv->desc_dma = dma + i * queue->desc_size;
+	}
+
+	return 0;
+}
+
+static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
+				     struct data_queue *queue)
+{
+	struct queue_entry_priv_pci *entry_priv =
+	    queue->entries[0].priv_data;
+
+	if (entry_priv->desc)
+		dma_free_coherent(rt2x00dev->dev,
+				  queue->limit * queue->desc_size,
+				  entry_priv->desc, entry_priv->desc_dma);
+	entry_priv->desc = NULL;
+}
+
+int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
+{
+	struct data_queue *queue;
+	int status;
+
+	/*
+	 * Allocate DMA
+	 */
+	queue_for_each(rt2x00dev, queue) {
+		status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
+		if (status)
+			goto exit;
+	}
+
+	/*
+	 * Register interrupt handler.
+	 */
+	status = request_irq(rt2x00dev->irq, rt2x00dev->ops->lib->irq_handler,
+			     IRQF_SHARED, rt2x00dev->name, rt2x00dev);
+	if (status) {
+		ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
+		      rt2x00dev->irq, status);
+		goto exit;
+	}
+
+	return 0;
+
+exit:
+	queue_for_each(rt2x00dev, queue)
+		rt2x00pci_free_queue_dma(rt2x00dev, queue);
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
+
+void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
+{
+	struct data_queue *queue;
+
+	/*
+	 * Free irq line.
+	 */
+	free_irq(to_pci_dev(rt2x00dev->dev)->irq, rt2x00dev);
+
+	/*
+	 * Free DMA
+	 */
+	queue_for_each(rt2x00dev, queue)
+		rt2x00pci_free_queue_dma(rt2x00dev, queue);
+}
+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.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:
+	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;
+	u16 chip;
+
+	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 (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
+		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->dev;
+	rt2x00dev->ops = ops;
+	rt2x00dev->hw = hw;
+	rt2x00dev->irq = pci_dev->irq;
+	rt2x00dev->name = pci_name(pci_dev);
+
+	/*
+	 * Determine RT chipset by reading PCI header.
+	 */
+	pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
+	rt2x00_set_chip_rt(rt2x00dev, chip);
+
+	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;
+
+	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;
+
+	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;
+	}
+
+	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 pci library");
+MODULE_LICENSE("GPL");