diff options
Diffstat (limited to 'arch/cris/arch-v10/kernel/dma.c')
| -rw-r--r-- | arch/cris/arch-v10/kernel/dma.c | 288 |
1 files changed, 0 insertions, 288 deletions
diff --git a/arch/cris/arch-v10/kernel/dma.c b/arch/cris/arch-v10/kernel/dma.c deleted file mode 100644 index c68e978def05..000000000000 --- a/arch/cris/arch-v10/kernel/dma.c +++ /dev/null @@ -1,288 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Wrapper for DMA channel allocator that updates DMA client muxing. - * Copyright 2004-2007, Axis Communications AB - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/errno.h> - -#include <asm/dma.h> -#include <arch/svinto.h> -#include <arch/system.h> - -/* Macro to access ETRAX 100 registers */ -#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \ - IO_STATE_(reg##_, field##_, _##val) - - -static char used_dma_channels[MAX_DMA_CHANNELS]; -static const char * used_dma_channels_users[MAX_DMA_CHANNELS]; - -int cris_request_dma(unsigned int dmanr, const char * device_id, - unsigned options, enum dma_owner owner) -{ - unsigned long flags; - unsigned long int gens; - int fail = -EINVAL; - - if (dmanr >= MAX_DMA_CHANNELS) { - printk(KERN_CRIT "cris_request_dma: invalid DMA channel %u\n", dmanr); - return -EINVAL; - } - - local_irq_save(flags); - if (used_dma_channels[dmanr]) { - local_irq_restore(flags); - if (options & DMA_VERBOSE_ON_ERROR) { - printk(KERN_CRIT "Failed to request DMA %i for %s, already allocated by %s\n", dmanr, device_id, used_dma_channels_users[dmanr]); - } - if (options & DMA_PANIC_ON_ERROR) { - panic("request_dma error!"); - } - return -EBUSY; - } - - gens = genconfig_shadow; - - switch(owner) - { - case dma_eth: - if ((dmanr != NETWORK_TX_DMA_NBR) && - (dmanr != NETWORK_RX_DMA_NBR)) { - printk(KERN_CRIT "Invalid DMA channel for eth\n"); - goto bail; - } - break; - case dma_ser0: - if (dmanr == SER0_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma6, serial0); - } else if (dmanr == SER0_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma7, serial0); - } else { - printk(KERN_CRIT "Invalid DMA channel for ser0\n"); - goto bail; - } - break; - case dma_ser1: - if (dmanr == SER1_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma8, serial1); - } else if (dmanr == SER1_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma9, serial1); - } else { - printk(KERN_CRIT "Invalid DMA channel for ser1\n"); - goto bail; - } - break; - case dma_ser2: - if (dmanr == SER2_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma2, serial2); - } else if (dmanr == SER2_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma3, serial2); - } else { - printk(KERN_CRIT "Invalid DMA channel for ser2\n"); - goto bail; - } - break; - case dma_ser3: - if (dmanr == SER3_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma4, serial3); - } else if (dmanr == SER3_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma5, serial3); - } else { - printk(KERN_CRIT "Invalid DMA channel for ser3\n"); - goto bail; - } - break; - case dma_ata: - if (dmanr == ATA_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma2, ata); - } else if (dmanr == ATA_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma3, ata); - } else { - printk(KERN_CRIT "Invalid DMA channel for ata\n"); - goto bail; - } - break; - case dma_ext0: - if (dmanr == EXTDMA0_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma4, extdma0); - } else if (dmanr == EXTDMA0_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma5, extdma0); - } else { - printk(KERN_CRIT "Invalid DMA channel for ext0\n"); - goto bail; - } - break; - case dma_ext1: - if (dmanr == EXTDMA1_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma6, extdma1); - } else if (dmanr == EXTDMA1_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma7, extdma1); - } else { - printk(KERN_CRIT "Invalid DMA channel for ext1\n"); - goto bail; - } - break; - case dma_int6: - if (dmanr == MEM2MEM_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma7, intdma6); - } else { - printk(KERN_CRIT "Invalid DMA channel for int6\n"); - goto bail; - } - break; - case dma_int7: - if (dmanr == MEM2MEM_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma6, intdma7); - } else { - printk(KERN_CRIT "Invalid DMA channel for int7\n"); - goto bail; - } - break; - case dma_usb: - if (dmanr == USB_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma8, usb); - } else if (dmanr == USB_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma9, usb); - } else { - printk(KERN_CRIT "Invalid DMA channel for usb\n"); - goto bail; - } - break; - case dma_scsi0: - if (dmanr == SCSI0_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma2, scsi0); - } else if (dmanr == SCSI0_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma3, scsi0); - } else { - printk(KERN_CRIT "Invalid DMA channel for scsi0\n"); - goto bail; - } - break; - case dma_scsi1: - if (dmanr == SCSI1_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma4, scsi1); - } else if (dmanr == SCSI1_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma5, scsi1); - } else { - printk(KERN_CRIT "Invalid DMA channel for scsi1\n"); - goto bail; - } - break; - case dma_par0: - if (dmanr == PAR0_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma2, par0); - } else if (dmanr == PAR0_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma3, par0); - } else { - printk(KERN_CRIT "Invalid DMA channel for par0\n"); - goto bail; - } - break; - case dma_par1: - if (dmanr == PAR1_TX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma4, par1); - } else if (dmanr == PAR1_RX_DMA_NBR) { - SETS(gens, R_GEN_CONFIG, dma5, par1); - } else { - printk(KERN_CRIT "Invalid DMA channel for par1\n"); - goto bail; - } - break; - default: - printk(KERN_CRIT "Invalid DMA owner.\n"); - goto bail; - } - - used_dma_channels[dmanr] = 1; - used_dma_channels_users[dmanr] = device_id; - - { - volatile int i; - genconfig_shadow = gens; - *R_GEN_CONFIG = genconfig_shadow; - /* Wait 12 cycles before doing any DMA command */ - for(i = 6; i > 0; i--) - nop(); - } - fail = 0; - bail: - local_irq_restore(flags); - return fail; -} - -void cris_free_dma(unsigned int dmanr, const char * device_id) -{ - unsigned long flags; - if (dmanr >= MAX_DMA_CHANNELS) { - printk(KERN_CRIT "cris_free_dma: invalid DMA channel %u\n", dmanr); - return; - } - - local_irq_save(flags); - if (!used_dma_channels[dmanr]) { - printk(KERN_CRIT "cris_free_dma: DMA channel %u not allocated\n", dmanr); - } else if (device_id != used_dma_channels_users[dmanr]) { - printk(KERN_CRIT "cris_free_dma: DMA channel %u not allocated by device\n", dmanr); - } else { - switch(dmanr) - { - case 0: - *R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH0_CMD, cmd, *R_DMA_CH0_CMD) == - IO_STATE_VALUE(R_DMA_CH0_CMD, cmd, reset)); - break; - case 1: - *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH1_CMD, cmd, *R_DMA_CH1_CMD) == - IO_STATE_VALUE(R_DMA_CH1_CMD, cmd, reset)); - break; - case 2: - *R_DMA_CH2_CMD = IO_STATE(R_DMA_CH2_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH2_CMD, cmd, *R_DMA_CH2_CMD) == - IO_STATE_VALUE(R_DMA_CH2_CMD, cmd, reset)); - break; - case 3: - *R_DMA_CH3_CMD = IO_STATE(R_DMA_CH3_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH3_CMD, cmd, *R_DMA_CH3_CMD) == - IO_STATE_VALUE(R_DMA_CH3_CMD, cmd, reset)); - break; - case 4: - *R_DMA_CH4_CMD = IO_STATE(R_DMA_CH4_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH4_CMD, cmd, *R_DMA_CH4_CMD) == - IO_STATE_VALUE(R_DMA_CH4_CMD, cmd, reset)); - break; - case 5: - *R_DMA_CH5_CMD = IO_STATE(R_DMA_CH5_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH5_CMD, cmd, *R_DMA_CH5_CMD) == - IO_STATE_VALUE(R_DMA_CH5_CMD, cmd, reset)); - break; - case 6: - *R_DMA_CH6_CMD = IO_STATE(R_DMA_CH6_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *R_DMA_CH6_CMD) == - IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset)); - break; - case 7: - *R_DMA_CH7_CMD = IO_STATE(R_DMA_CH7_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH7_CMD, cmd, *R_DMA_CH7_CMD) == - IO_STATE_VALUE(R_DMA_CH7_CMD, cmd, reset)); - break; - case 8: - *R_DMA_CH8_CMD = IO_STATE(R_DMA_CH8_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH8_CMD, cmd, *R_DMA_CH8_CMD) == - IO_STATE_VALUE(R_DMA_CH8_CMD, cmd, reset)); - break; - case 9: - *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH9_CMD, cmd, *R_DMA_CH9_CMD) == - IO_STATE_VALUE(R_DMA_CH9_CMD, cmd, reset)); - break; - } - used_dma_channels[dmanr] = 0; - } - local_irq_restore(flags); -} - -EXPORT_SYMBOL(cris_request_dma); -EXPORT_SYMBOL(cris_free_dma); |