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-rw-r--r--arch/mips/au1000/common/dma.c241
1 files changed, 0 insertions, 241 deletions
diff --git a/arch/mips/au1000/common/dma.c b/arch/mips/au1000/common/dma.c
deleted file mode 100644
index c78260d4e83..00000000000
--- a/arch/mips/au1000/common/dma.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/*
- *
- * BRIEF MODULE DESCRIPTION
- * A DMA channel allocator for Au1000. API is modeled loosely off of
- * linux/kernel/dma.c.
- *
- * Copyright 2000 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * stevel@mvista.com or source@mvista.com
- * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
- *
- * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <asm/system.h>
-#include <asm/mach-au1x00/au1000.h>
-#include <asm/mach-au1x00/au1000_dma.h>
-
-#if defined(CONFIG_SOC_AU1000) || defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1100)
-/*
- * A note on resource allocation:
- *
- * All drivers needing DMA channels, should allocate and release them
- * through the public routines `request_dma()' and `free_dma()'.
- *
- * In order to avoid problems, all processes should allocate resources in
- * the same sequence and release them in the reverse order.
- *
- * So, when allocating DMAs and IRQs, first allocate the DMA, then the IRQ.
- * When releasing them, first release the IRQ, then release the DMA. The
- * main reason for this order is that, if you are requesting the DMA buffer
- * done interrupt, you won't know the irq number until the DMA channel is
- * returned from request_dma.
- */
-
-
-DEFINE_SPINLOCK(au1000_dma_spin_lock);
-
-struct dma_chan au1000_dma_table[NUM_AU1000_DMA_CHANNELS] = {
- {.dev_id = -1,},
- {.dev_id = -1,},
- {.dev_id = -1,},
- {.dev_id = -1,},
- {.dev_id = -1,},
- {.dev_id = -1,},
- {.dev_id = -1,},
- {.dev_id = -1,}
-};
-EXPORT_SYMBOL(au1000_dma_table);
-
-// Device FIFO addresses and default DMA modes
-static const struct dma_dev {
- unsigned int fifo_addr;
- unsigned int dma_mode;
-} dma_dev_table[DMA_NUM_DEV] = {
- {UART0_ADDR + UART_TX, 0},
- {UART0_ADDR + UART_RX, 0},
- {0, 0},
- {0, 0},
- {AC97C_DATA, DMA_DW16 }, // coherent
- {AC97C_DATA, DMA_DR | DMA_DW16 }, // coherent
- {UART3_ADDR + UART_TX, DMA_DW8 | DMA_NC},
- {UART3_ADDR + UART_RX, DMA_DR | DMA_DW8 | DMA_NC},
- {USBD_EP0RD, DMA_DR | DMA_DW8 | DMA_NC},
- {USBD_EP0WR, DMA_DW8 | DMA_NC},
- {USBD_EP2WR, DMA_DW8 | DMA_NC},
- {USBD_EP3WR, DMA_DW8 | DMA_NC},
- {USBD_EP4RD, DMA_DR | DMA_DW8 | DMA_NC},
- {USBD_EP5RD, DMA_DR | DMA_DW8 | DMA_NC},
- {I2S_DATA, DMA_DW32 | DMA_NC},
- {I2S_DATA, DMA_DR | DMA_DW32 | DMA_NC}
-};
-
-int au1000_dma_read_proc(char *buf, char **start, off_t fpos,
- int length, int *eof, void *data)
-{
- int i, len = 0;
- struct dma_chan *chan;
-
- for (i = 0; i < NUM_AU1000_DMA_CHANNELS; i++) {
- if ((chan = get_dma_chan(i)) != NULL) {
- len += sprintf(buf + len, "%2d: %s\n",
- i, chan->dev_str);
- }
- }
-
- if (fpos >= len) {
- *start = buf;
- *eof = 1;
- return 0;
- }
- *start = buf + fpos;
- if ((len -= fpos) > length)
- return length;
- *eof = 1;
- return len;
-}
-
-// Device FIFO addresses and default DMA modes - 2nd bank
-static const struct dma_dev dma_dev_table_bank2[DMA_NUM_DEV_BANK2] = {
- {SD0_XMIT_FIFO, DMA_DS | DMA_DW8}, // coherent
- {SD0_RECV_FIFO, DMA_DS | DMA_DR | DMA_DW8}, // coherent
- {SD1_XMIT_FIFO, DMA_DS | DMA_DW8}, // coherent
- {SD1_RECV_FIFO, DMA_DS | DMA_DR | DMA_DW8} // coherent
-};
-
-void dump_au1000_dma_channel(unsigned int dmanr)
-{
- struct dma_chan *chan;
-
- if (dmanr >= NUM_AU1000_DMA_CHANNELS)
- return;
- chan = &au1000_dma_table[dmanr];
-
- printk(KERN_INFO "Au1000 DMA%d Register Dump:\n", dmanr);
- printk(KERN_INFO " mode = 0x%08x\n",
- au_readl(chan->io + DMA_MODE_SET));
- printk(KERN_INFO " addr = 0x%08x\n",
- au_readl(chan->io + DMA_PERIPHERAL_ADDR));
- printk(KERN_INFO " start0 = 0x%08x\n",
- au_readl(chan->io + DMA_BUFFER0_START));
- printk(KERN_INFO " start1 = 0x%08x\n",
- au_readl(chan->io + DMA_BUFFER1_START));
- printk(KERN_INFO " count0 = 0x%08x\n",
- au_readl(chan->io + DMA_BUFFER0_COUNT));
- printk(KERN_INFO " count1 = 0x%08x\n",
- au_readl(chan->io + DMA_BUFFER1_COUNT));
-}
-
-
-/*
- * Finds a free channel, and binds the requested device to it.
- * Returns the allocated channel number, or negative on error.
- * Requests the DMA done IRQ if irqhandler != NULL.
- */
-int request_au1000_dma(int dev_id, const char *dev_str,
- irq_handler_t irqhandler,
- unsigned long irqflags,
- void *irq_dev_id)
-{
- struct dma_chan *chan;
- const struct dma_dev *dev;
- int i, ret;
-
-#if defined(CONFIG_SOC_AU1100)
- if (dev_id < 0 || dev_id >= (DMA_NUM_DEV + DMA_NUM_DEV_BANK2))
- return -EINVAL;
-#else
- if (dev_id < 0 || dev_id >= DMA_NUM_DEV)
- return -EINVAL;
-#endif
-
- for (i = 0; i < NUM_AU1000_DMA_CHANNELS; i++) {
- if (au1000_dma_table[i].dev_id < 0)
- break;
- }
- if (i == NUM_AU1000_DMA_CHANNELS)
- return -ENODEV;
-
- chan = &au1000_dma_table[i];
-
- if (dev_id >= DMA_NUM_DEV) {
- dev_id -= DMA_NUM_DEV;
- dev = &dma_dev_table_bank2[dev_id];
- } else {
- dev = &dma_dev_table[dev_id];
- }
-
- if (irqhandler) {
- chan->irq = AU1000_DMA_INT_BASE + i;
- chan->irq_dev = irq_dev_id;
- if ((ret = request_irq(chan->irq, irqhandler, irqflags,
- dev_str, chan->irq_dev))) {
- chan->irq = 0;
- chan->irq_dev = NULL;
- return ret;
- }
- } else {
- chan->irq = 0;
- chan->irq_dev = NULL;
- }
-
- // fill it in
- chan->io = DMA_CHANNEL_BASE + i * DMA_CHANNEL_LEN;
- chan->dev_id = dev_id;
- chan->dev_str = dev_str;
- chan->fifo_addr = dev->fifo_addr;
- chan->mode = dev->dma_mode;
-
- /* initialize the channel before returning */
- init_dma(i);
-
- return i;
-}
-EXPORT_SYMBOL(request_au1000_dma);
-
-void free_au1000_dma(unsigned int dmanr)
-{
- struct dma_chan *chan = get_dma_chan(dmanr);
- if (!chan) {
- printk("Trying to free DMA%d\n", dmanr);
- return;
- }
-
- disable_dma(dmanr);
- if (chan->irq)
- free_irq(chan->irq, chan->irq_dev);
-
- chan->irq = 0;
- chan->irq_dev = NULL;
- chan->dev_id = -1;
-}
-EXPORT_SYMBOL(free_au1000_dma);
-
-#endif // AU1000 AU1500 AU1100
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