| /* |
| Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com> |
| <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; |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return 0; |
| |
| 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 txentry_desc *txdesc) |
| { |
| 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; |
| |
| 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); |
| |
| rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI); |
| |
| 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"); |