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path: root/arch/cris/arch-v10/kernel/dma.c
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Diffstat (limited to 'arch/cris/arch-v10/kernel/dma.c')
-rw-r--r--arch/cris/arch-v10/kernel/dma.c288
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 00:28:22 +0300