diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
commit | 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch) | |
tree | fa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/net/wireless/rt2x00/rt2x00mmio.c | |
parent | d4e493caf788ef44982e131ff9c786546904d934 (diff) |
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00mmio.c')
-rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00mmio.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00mmio.c b/drivers/net/wireless/rt2x00/rt2x00mmio.c deleted file mode 100644 index f0178fd4f..000000000 --- a/drivers/net/wireless/rt2x00/rt2x00mmio.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - 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, see <http://www.gnu.org/licenses/>. - */ - -/* - Module: rt2x00mmio - Abstract: rt2x00 generic mmio device routines. - */ - -#include <linux/dma-mapping.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> - -#include "rt2x00.h" -#include "rt2x00mmio.h" - -/* - * Register access. - */ -int rt2x00mmio_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++) { - rt2x00mmio_register_read(rt2x00dev, offset, reg); - if (!rt2x00_get_field32(*reg, field)) - return 1; - udelay(REGISTER_BUSY_DELAY); - } - - printk_once(KERN_ERR "%s() Indirect register access failed: " - "offset=0x%.08x, value=0x%.08x\n", __func__, offset, *reg); - *reg = ~0; - - return 0; -} -EXPORT_SYMBOL_GPL(rt2x00mmio_regbusy_read); - -bool rt2x00mmio_rxdone(struct rt2x00_dev *rt2x00dev) -{ - struct data_queue *queue = rt2x00dev->rx; - struct queue_entry *entry; - struct queue_entry_priv_mmio *entry_priv; - struct skb_frame_desc *skbdesc; - int max_rx = 16; - - while (--max_rx) { - 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; - - /* - * DMA is already done, notify rt2x00lib that - * it finished successfully. - */ - rt2x00lib_dmastart(entry); - rt2x00lib_dmadone(entry); - - /* - * Send the frame to rt2x00lib for further processing. - */ - rt2x00lib_rxdone(entry, GFP_ATOMIC); - } - - return !max_rx; -} -EXPORT_SYMBOL_GPL(rt2x00mmio_rxdone); - -void rt2x00mmio_flush_queue(struct data_queue *queue, bool drop) -{ - unsigned int i; - - for (i = 0; !rt2x00queue_empty(queue) && i < 10; i++) - msleep(10); -} -EXPORT_SYMBOL_GPL(rt2x00mmio_flush_queue); - -/* - * Device initialization handlers. - */ -static int rt2x00mmio_alloc_queue_dma(struct rt2x00_dev *rt2x00dev, - struct data_queue *queue) -{ - struct queue_entry_priv_mmio *entry_priv; - void *addr; - dma_addr_t dma; - unsigned int i; - - /* - * Allocate DMA memory for descriptor and buffer. - */ - addr = dma_zalloc_coherent(rt2x00dev->dev, - queue->limit * queue->desc_size, &dma, - GFP_KERNEL); - if (!addr) - return -ENOMEM; - - /* - * 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 rt2x00mmio_free_queue_dma(struct rt2x00_dev *rt2x00dev, - struct data_queue *queue) -{ - struct queue_entry_priv_mmio *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 rt2x00mmio_initialize(struct rt2x00_dev *rt2x00dev) -{ - struct data_queue *queue; - int status; - - /* - * Allocate DMA - */ - queue_for_each(rt2x00dev, queue) { - status = rt2x00mmio_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) { - rt2x00_err(rt2x00dev, "IRQ %d allocation failed (error %d)\n", - rt2x00dev->irq, status); - goto exit; - } - - return 0; - -exit: - queue_for_each(rt2x00dev, queue) - rt2x00mmio_free_queue_dma(rt2x00dev, queue); - - return status; -} -EXPORT_SYMBOL_GPL(rt2x00mmio_initialize); - -void rt2x00mmio_uninitialize(struct rt2x00_dev *rt2x00dev) -{ - struct data_queue *queue; - - /* - * Free irq line. - */ - free_irq(rt2x00dev->irq, rt2x00dev); - - /* - * Free DMA - */ - queue_for_each(rt2x00dev, queue) - rt2x00mmio_free_queue_dma(rt2x00dev, queue); -} -EXPORT_SYMBOL_GPL(rt2x00mmio_uninitialize); - -/* - * rt2x00mmio module information. - */ -MODULE_AUTHOR(DRV_PROJECT); -MODULE_VERSION(DRV_VERSION); -MODULE_DESCRIPTION("rt2x00 mmio library"); -MODULE_LICENSE("GPL"); |