diff options
Diffstat (limited to 'arch/ppc/syslib/ppc4xx_dma.c')
| -rw-r--r-- | arch/ppc/syslib/ppc4xx_dma.c | 710 |
1 files changed, 0 insertions, 710 deletions
diff --git a/arch/ppc/syslib/ppc4xx_dma.c b/arch/ppc/syslib/ppc4xx_dma.c deleted file mode 100644 index bd301868996..00000000000 --- a/arch/ppc/syslib/ppc4xx_dma.c +++ /dev/null @@ -1,710 +0,0 @@ -/* - * IBM PPC4xx DMA engine core library - * - * Copyright 2000-2004 MontaVista Software Inc. - * - * Cleaned up and converted to new DCR access - * Matt Porter <mporter@kernel.crashing.org> - * - * Original code by Armin Kuster <akuster@mvista.com> - * and Pete Popov <ppopov@mvista.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. - * - * 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/kernel.h> -#include <linux/mm.h> -#include <linux/miscdevice.h> -#include <linux/init.h> -#include <linux/module.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/dma.h> -#include <asm/ppc4xx_dma.h> - -ppc_dma_ch_t dma_channels[MAX_PPC4xx_DMA_CHANNELS]; - -int -ppc4xx_get_dma_status(void) -{ - return (mfdcr(DCRN_DMASR)); -} - -void -ppc4xx_set_src_addr(int dmanr, phys_addr_t src_addr) -{ - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("set_src_addr: bad channel: %d\n", dmanr); - return; - } - -#ifdef PPC4xx_DMA_64BIT - mtdcr(DCRN_DMASAH0 + dmanr*2, (u32)(src_addr >> 32)); -#else - mtdcr(DCRN_DMASA0 + dmanr*2, (u32)src_addr); -#endif -} - -void -ppc4xx_set_dst_addr(int dmanr, phys_addr_t dst_addr) -{ - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("set_dst_addr: bad channel: %d\n", dmanr); - return; - } - -#ifdef PPC4xx_DMA_64BIT - mtdcr(DCRN_DMADAH0 + dmanr*2, (u32)(dst_addr >> 32)); -#else - mtdcr(DCRN_DMADA0 + dmanr*2, (u32)dst_addr); -#endif -} - -void -ppc4xx_enable_dma(unsigned int dmanr) -{ - unsigned int control; - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - unsigned int status_bits[] = { DMA_CS0 | DMA_TS0 | DMA_CH0_ERR, - DMA_CS1 | DMA_TS1 | DMA_CH1_ERR, - DMA_CS2 | DMA_TS2 | DMA_CH2_ERR, - DMA_CS3 | DMA_TS3 | DMA_CH3_ERR}; - - if (p_dma_ch->in_use) { - printk("enable_dma: channel %d in use\n", dmanr); - return; - } - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("enable_dma: bad channel: %d\n", dmanr); - return; - } - - if (p_dma_ch->mode == DMA_MODE_READ) { - /* peripheral to memory */ - ppc4xx_set_src_addr(dmanr, 0); - ppc4xx_set_dst_addr(dmanr, p_dma_ch->addr); - } else if (p_dma_ch->mode == DMA_MODE_WRITE) { - /* memory to peripheral */ - ppc4xx_set_src_addr(dmanr, p_dma_ch->addr); - ppc4xx_set_dst_addr(dmanr, 0); - } - - /* for other xfer modes, the addresses are already set */ - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - - control &= ~(DMA_TM_MASK | DMA_TD); /* clear all mode bits */ - if (p_dma_ch->mode == DMA_MODE_MM) { - /* software initiated memory to memory */ - control |= DMA_ETD_OUTPUT | DMA_TCE_ENABLE; - } - - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - /* - * Clear the CS, TS, RI bits for the channel from DMASR. This - * has been observed to happen correctly only after the mode and - * ETD/DCE bits in DMACRx are set above. Must do this before - * enabling the channel. - */ - - mtdcr(DCRN_DMASR, status_bits[dmanr]); - - /* - * For device-paced transfers, Terminal Count Enable apparently - * must be on, and this must be turned on after the mode, etc. - * bits are cleared above (at least on Redwood-6). - */ - - if ((p_dma_ch->mode == DMA_MODE_MM_DEVATDST) || - (p_dma_ch->mode == DMA_MODE_MM_DEVATSRC)) - control |= DMA_TCE_ENABLE; - - /* - * Now enable the channel. - */ - - control |= (p_dma_ch->mode | DMA_CE_ENABLE); - - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - p_dma_ch->in_use = 1; -} - -void -ppc4xx_disable_dma(unsigned int dmanr) -{ - unsigned int control; - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - if (!p_dma_ch->in_use) { - printk("disable_dma: channel %d not in use\n", dmanr); - return; - } - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("disable_dma: bad channel: %d\n", dmanr); - return; - } - - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - control &= ~DMA_CE_ENABLE; - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - p_dma_ch->in_use = 0; -} - -/* - * Sets the dma mode for single DMA transfers only. - * For scatter/gather transfers, the mode is passed to the - * alloc_dma_handle() function as one of the parameters. - * - * The mode is simply saved and used later. This allows - * the driver to call set_dma_mode() and set_dma_addr() in - * any order. - * - * Valid mode values are: - * - * DMA_MODE_READ peripheral to memory - * DMA_MODE_WRITE memory to peripheral - * DMA_MODE_MM memory to memory - * DMA_MODE_MM_DEVATSRC device-paced memory to memory, device at src - * DMA_MODE_MM_DEVATDST device-paced memory to memory, device at dst - */ -int -ppc4xx_set_dma_mode(unsigned int dmanr, unsigned int mode) -{ - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("set_dma_mode: bad channel 0x%x\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - p_dma_ch->mode = mode; - - return DMA_STATUS_GOOD; -} - -/* - * Sets the DMA Count register. Note that 'count' is in bytes. - * However, the DMA Count register counts the number of "transfers", - * where each transfer is equal to the bus width. Thus, count - * MUST be a multiple of the bus width. - */ -void -ppc4xx_set_dma_count(unsigned int dmanr, unsigned int count) -{ - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - -#ifdef DEBUG_4xxDMA - { - int error = 0; - switch (p_dma_ch->pwidth) { - case PW_8: - break; - case PW_16: - if (count & 0x1) - error = 1; - break; - case PW_32: - if (count & 0x3) - error = 1; - break; - case PW_64: - if (count & 0x7) - error = 1; - break; - default: - printk("set_dma_count: invalid bus width: 0x%x\n", - p_dma_ch->pwidth); - return; - } - if (error) - printk - ("Warning: set_dma_count count 0x%x bus width %d\n", - count, p_dma_ch->pwidth); - } -#endif - - count = count >> p_dma_ch->shift; - - mtdcr(DCRN_DMACT0 + (dmanr * 0x8), count); -} - -/* - * Returns the number of bytes left to be transferred. - * After a DMA transfer, this should return zero. - * Reading this while a DMA transfer is still in progress will return - * unpredictable results. - */ -int -ppc4xx_get_dma_residue(unsigned int dmanr) -{ - unsigned int count; - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_get_dma_residue: bad channel 0x%x\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - count = mfdcr(DCRN_DMACT0 + (dmanr * 0x8)); - - return (count << p_dma_ch->shift); -} - -/* - * Sets the DMA address for a memory to peripheral or peripheral - * to memory transfer. The address is just saved in the channel - * structure for now and used later in enable_dma(). - */ -void -ppc4xx_set_dma_addr(unsigned int dmanr, phys_addr_t addr) -{ - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_set_dma_addr: bad channel: %d\n", dmanr); - return; - } - -#ifdef DEBUG_4xxDMA - { - int error = 0; - switch (p_dma_ch->pwidth) { - case PW_8: - break; - case PW_16: - if ((unsigned) addr & 0x1) - error = 1; - break; - case PW_32: - if ((unsigned) addr & 0x3) - error = 1; - break; - case PW_64: - if ((unsigned) addr & 0x7) - error = 1; - break; - default: - printk("ppc4xx_set_dma_addr: invalid bus width: 0x%x\n", - p_dma_ch->pwidth); - return; - } - if (error) - printk("Warning: ppc4xx_set_dma_addr addr 0x%x bus width %d\n", - addr, p_dma_ch->pwidth); - } -#endif - - /* save dma address and program it later after we know the xfer mode */ - p_dma_ch->addr = addr; -} - -/* - * Sets both DMA addresses for a memory to memory transfer. - * For memory to peripheral or peripheral to memory transfers - * the function set_dma_addr() should be used instead. - */ -void -ppc4xx_set_dma_addr2(unsigned int dmanr, phys_addr_t src_dma_addr, - phys_addr_t dst_dma_addr) -{ - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_set_dma_addr2: bad channel: %d\n", dmanr); - return; - } - -#ifdef DEBUG_4xxDMA - { - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - int error = 0; - switch (p_dma_ch->pwidth) { - case PW_8: - break; - case PW_16: - if (((unsigned) src_dma_addr & 0x1) || - ((unsigned) dst_dma_addr & 0x1) - ) - error = 1; - break; - case PW_32: - if (((unsigned) src_dma_addr & 0x3) || - ((unsigned) dst_dma_addr & 0x3) - ) - error = 1; - break; - case PW_64: - if (((unsigned) src_dma_addr & 0x7) || - ((unsigned) dst_dma_addr & 0x7) - ) - error = 1; - break; - default: - printk("ppc4xx_set_dma_addr2: invalid bus width: 0x%x\n", - p_dma_ch->pwidth); - return; - } - if (error) - printk - ("Warning: ppc4xx_set_dma_addr2 src 0x%x dst 0x%x bus width %d\n", - src_dma_addr, dst_dma_addr, p_dma_ch->pwidth); - } -#endif - - ppc4xx_set_src_addr(dmanr, src_dma_addr); - ppc4xx_set_dst_addr(dmanr, dst_dma_addr); -} - -/* - * Enables the channel interrupt. - * - * If performing a scatter/gatter transfer, this function - * MUST be called before calling alloc_dma_handle() and building - * the sgl list. Otherwise, interrupts will not be enabled, if - * they were previously disabled. - */ -int -ppc4xx_enable_dma_interrupt(unsigned int dmanr) -{ - unsigned int control; - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_enable_dma_interrupt: bad channel: %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - p_dma_ch->int_enable = 1; - - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - control |= DMA_CIE_ENABLE; /* Channel Interrupt Enable */ - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - return DMA_STATUS_GOOD; -} - -/* - * Disables the channel interrupt. - * - * If performing a scatter/gatter transfer, this function - * MUST be called before calling alloc_dma_handle() and building - * the sgl list. Otherwise, interrupts will not be disabled, if - * they were previously enabled. - */ -int -ppc4xx_disable_dma_interrupt(unsigned int dmanr) -{ - unsigned int control; - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_disable_dma_interrupt: bad channel: %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - p_dma_ch->int_enable = 0; - - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - control &= ~DMA_CIE_ENABLE; /* Channel Interrupt Enable */ - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - return DMA_STATUS_GOOD; -} - -/* - * Configures a DMA channel, including the peripheral bus width, if a - * peripheral is attached to the channel, the polarity of the DMAReq and - * DMAAck signals, etc. This information should really be setup by the boot - * code, since most likely the configuration won't change dynamically. - * If the kernel has to call this function, it's recommended that it's - * called from platform specific init code. The driver should not need to - * call this function. - */ -int -ppc4xx_init_dma_channel(unsigned int dmanr, ppc_dma_ch_t * p_init) -{ - unsigned int polarity; - uint32_t control = 0; - ppc_dma_ch_t *p_dma_ch = &dma_channels[dmanr]; - - DMA_MODE_READ = (unsigned long) DMA_TD; /* Peripheral to Memory */ - DMA_MODE_WRITE = 0; /* Memory to Peripheral */ - - if (!p_init) { - printk("ppc4xx_init_dma_channel: NULL p_init\n"); - return DMA_STATUS_NULL_POINTER; - } - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_init_dma_channel: bad channel %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - -#if DCRN_POL > 0 - polarity = mfdcr(DCRN_POL); -#else - polarity = 0; -#endif - - /* Setup the control register based on the values passed to - * us in p_init. Then, over-write the control register with this - * new value. - */ - control |= SET_DMA_CONTROL; - - /* clear all polarity signals and then "or" in new signal levels */ - polarity &= ~GET_DMA_POLARITY(dmanr); - polarity |= p_init->polarity; -#if DCRN_POL > 0 - mtdcr(DCRN_POL, polarity); -#endif - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - /* save these values in our dma channel structure */ - memcpy(p_dma_ch, p_init, sizeof (ppc_dma_ch_t)); - - /* - * The peripheral width values written in the control register are: - * PW_8 0 - * PW_16 1 - * PW_32 2 - * PW_64 3 - * - * Since the DMA count register takes the number of "transfers", - * we need to divide the count sent to us in certain - * functions by the appropriate number. It so happens that our - * right shift value is equal to the peripheral width value. - */ - p_dma_ch->shift = p_init->pwidth; - - /* - * Save the control word for easy access. - */ - p_dma_ch->control = control; - - mtdcr(DCRN_DMASR, 0xffffffff); /* clear status register */ - return DMA_STATUS_GOOD; -} - -/* - * This function returns the channel configuration. - */ -int -ppc4xx_get_channel_config(unsigned int dmanr, ppc_dma_ch_t * p_dma_ch) -{ - unsigned int polarity; - unsigned int control; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_get_channel_config: bad channel %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - memcpy(p_dma_ch, &dma_channels[dmanr], sizeof (ppc_dma_ch_t)); - -#if DCRN_POL > 0 - polarity = mfdcr(DCRN_POL); -#else - polarity = 0; -#endif - - p_dma_ch->polarity = polarity & GET_DMA_POLARITY(dmanr); - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - - p_dma_ch->cp = GET_DMA_PRIORITY(control); - p_dma_ch->pwidth = GET_DMA_PW(control); - p_dma_ch->psc = GET_DMA_PSC(control); - p_dma_ch->pwc = GET_DMA_PWC(control); - p_dma_ch->phc = GET_DMA_PHC(control); - p_dma_ch->ce = GET_DMA_CE_ENABLE(control); - p_dma_ch->int_enable = GET_DMA_CIE_ENABLE(control); - p_dma_ch->shift = GET_DMA_PW(control); - -#ifdef CONFIG_PPC4xx_EDMA - p_dma_ch->pf = GET_DMA_PREFETCH(control); -#else - p_dma_ch->ch_enable = GET_DMA_CH(control); - p_dma_ch->ece_enable = GET_DMA_ECE(control); - p_dma_ch->tcd_disable = GET_DMA_TCD(control); -#endif - return DMA_STATUS_GOOD; -} - -/* - * Sets the priority for the DMA channel dmanr. - * Since this is setup by the hardware init function, this function - * can be used to dynamically change the priority of a channel. - * - * Acceptable priorities: - * - * PRIORITY_LOW - * PRIORITY_MID_LOW - * PRIORITY_MID_HIGH - * PRIORITY_HIGH - * - */ -int -ppc4xx_set_channel_priority(unsigned int dmanr, unsigned int priority) -{ - unsigned int control; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_set_channel_priority: bad channel %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - if ((priority != PRIORITY_LOW) && - (priority != PRIORITY_MID_LOW) && - (priority != PRIORITY_MID_HIGH) && (priority != PRIORITY_HIGH)) { - printk("ppc4xx_set_channel_priority: bad priority: 0x%x\n", priority); - } - - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - control |= SET_DMA_PRIORITY(priority); - mtdcr(DCRN_DMACR0 + (dmanr * 0x8), control); - - return DMA_STATUS_GOOD; -} - -/* - * Returns the width of the peripheral attached to this channel. This assumes - * that someone who knows the hardware configuration, boot code or some other - * init code, already set the width. - * - * The return value is one of: - * PW_8 - * PW_16 - * PW_32 - * PW_64 - * - * The function returns 0 on error. - */ -unsigned int -ppc4xx_get_peripheral_width(unsigned int dmanr) -{ - unsigned int control; - - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk("ppc4xx_get_peripheral_width: bad channel %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - - control = mfdcr(DCRN_DMACR0 + (dmanr * 0x8)); - - return (GET_DMA_PW(control)); -} - -/* - * Clears the channel status bits - */ -int -ppc4xx_clr_dma_status(unsigned int dmanr) -{ - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk(KERN_ERR "ppc4xx_clr_dma_status: bad channel: %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - mtdcr(DCRN_DMASR, ((u32)DMA_CH0_ERR | (u32)DMA_CS0 | (u32)DMA_TS0) >> dmanr); - return DMA_STATUS_GOOD; -} - -#ifdef CONFIG_PPC4xx_EDMA -/* - * Enables the burst on the channel (BTEN bit in the control/count register) - * Note: - * For scatter/gather dma, this function MUST be called before the - * ppc4xx_alloc_dma_handle() func as the chan count register is copied into the - * sgl list and used as each sgl element is added. - */ -int -ppc4xx_enable_burst(unsigned int dmanr) -{ - unsigned int ctc; - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk(KERN_ERR "ppc4xx_enable_burst: bad channel: %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - ctc = mfdcr(DCRN_DMACT0 + (dmanr * 0x8)) | DMA_CTC_BTEN; - mtdcr(DCRN_DMACT0 + (dmanr * 0x8), ctc); - return DMA_STATUS_GOOD; -} -/* - * Disables the burst on the channel (BTEN bit in the control/count register) - * Note: - * For scatter/gather dma, this function MUST be called before the - * ppc4xx_alloc_dma_handle() func as the chan count register is copied into the - * sgl list and used as each sgl element is added. - */ -int -ppc4xx_disable_burst(unsigned int dmanr) -{ - unsigned int ctc; - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk(KERN_ERR "ppc4xx_disable_burst: bad channel: %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - ctc = mfdcr(DCRN_DMACT0 + (dmanr * 0x8)) &~ DMA_CTC_BTEN; - mtdcr(DCRN_DMACT0 + (dmanr * 0x8), ctc); - return DMA_STATUS_GOOD; -} -/* - * Sets the burst size (number of peripheral widths) for the channel - * (BSIZ bits in the control/count register)) - * must be one of: - * DMA_CTC_BSIZ_2 - * DMA_CTC_BSIZ_4 - * DMA_CTC_BSIZ_8 - * DMA_CTC_BSIZ_16 - * Note: - * For scatter/gather dma, this function MUST be called before the - * ppc4xx_alloc_dma_handle() func as the chan count register is copied into the - * sgl list and used as each sgl element is added. - */ -int -ppc4xx_set_burst_size(unsigned int dmanr, unsigned int bsize) -{ - unsigned int ctc; - if (dmanr >= MAX_PPC4xx_DMA_CHANNELS) { - printk(KERN_ERR "ppc4xx_set_burst_size: bad channel: %d\n", dmanr); - return DMA_STATUS_BAD_CHANNEL; - } - ctc = mfdcr(DCRN_DMACT0 + (dmanr * 0x8)) &~ DMA_CTC_BSIZ_MSK; - ctc |= (bsize & DMA_CTC_BSIZ_MSK); - mtdcr(DCRN_DMACT0 + (dmanr * 0x8), ctc); - return DMA_STATUS_GOOD; -} - -EXPORT_SYMBOL(ppc4xx_enable_burst); -EXPORT_SYMBOL(ppc4xx_disable_burst); -EXPORT_SYMBOL(ppc4xx_set_burst_size); -#endif /* CONFIG_PPC4xx_EDMA */ - -EXPORT_SYMBOL(ppc4xx_init_dma_channel); -EXPORT_SYMBOL(ppc4xx_get_channel_config); -EXPORT_SYMBOL(ppc4xx_set_channel_priority); -EXPORT_SYMBOL(ppc4xx_get_peripheral_width); -EXPORT_SYMBOL(dma_channels); -EXPORT_SYMBOL(ppc4xx_set_src_addr); -EXPORT_SYMBOL(ppc4xx_set_dst_addr); -EXPORT_SYMBOL(ppc4xx_set_dma_addr); -EXPORT_SYMBOL(ppc4xx_set_dma_addr2); -EXPORT_SYMBOL(ppc4xx_enable_dma); -EXPORT_SYMBOL(ppc4xx_disable_dma); -EXPORT_SYMBOL(ppc4xx_set_dma_mode); -EXPORT_SYMBOL(ppc4xx_set_dma_count); -EXPORT_SYMBOL(ppc4xx_get_dma_residue); -EXPORT_SYMBOL(ppc4xx_enable_dma_interrupt); -EXPORT_SYMBOL(ppc4xx_disable_dma_interrupt); -EXPORT_SYMBOL(ppc4xx_get_dma_status); -EXPORT_SYMBOL(ppc4xx_clr_dma_status); - |