arch: remove unicore32 port

[linux-2.6-block.git] / arch / unicore32 / kernel / dma.c

diff --git a/arch/unicore32/kernel/dma.c b/arch/unicore32/kernel/dma.c
deleted file mode 100644 (file)
index 7a0e2d4..0000000
--- a/arch/unicore32/kernel/dma.c
+++ /dev/null
@@ -1,179 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * linux/arch/unicore32/kernel/dma.c
- *
- * Code specific to PKUnity SoC and UniCore ISA
- *
- *     Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
- *     Copyright (C) 2001-2010 Guan Xuetao
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <mach/hardware.h>
-#include <mach/dma.h>
-
-struct dma_channel {
-       char *name;
-       puv3_dma_prio prio;
-       void (*irq_handler)(int, void *);
-       void (*err_handler)(int, void *);
-       void *data;
-};
-
-static struct dma_channel dma_channels[MAX_DMA_CHANNELS];
-
-int puv3_request_dma(char *name, puv3_dma_prio prio,
-                        void (*irq_handler)(int, void *),
-                        void (*err_handler)(int, void *),
-                        void *data)
-{
-       unsigned long flags;
-       int i, found = 0;
-
-       /* basic sanity checks */
-       if (!name)
-               return -EINVAL;
-
-       local_irq_save(flags);
-
-       do {
-               /* try grabbing a DMA channel with the requested priority */
-               for (i = 0; i < MAX_DMA_CHANNELS; i++) {
-                       if ((dma_channels[i].prio == prio) &&
-                           !dma_channels[i].name) {
-                               found = 1;
-                               break;
-                       }
-               }
-               /* if requested prio group is full, try a hier priority */
-       } while (!found && prio--);
-
-       if (found) {
-               dma_channels[i].name = name;
-               dma_channels[i].irq_handler = irq_handler;
-               dma_channels[i].err_handler = err_handler;
-               dma_channels[i].data = data;
-       } else {
-               printk(KERN_WARNING "No more available DMA channels for %s\n",
-                               name);
-               i = -ENODEV;
-       }
-
-       local_irq_restore(flags);
-       return i;
-}
-EXPORT_SYMBOL(puv3_request_dma);
-
-void puv3_free_dma(int dma_ch)
-{
-       unsigned long flags;
-
-       if (!dma_channels[dma_ch].name) {
-               printk(KERN_CRIT
-                       "%s: trying to free channel %d which is already freed\n",
-                       __func__, dma_ch);
-               return;
-       }
-
-       local_irq_save(flags);
-       dma_channels[dma_ch].name = NULL;
-       dma_channels[dma_ch].err_handler = NULL;
-       local_irq_restore(flags);
-}
-EXPORT_SYMBOL(puv3_free_dma);
-
-static irqreturn_t dma_irq_handler(int irq, void *dev_id)
-{
-       int i, dint;
-
-       dint = readl(DMAC_ITCSR);
-       for (i = 0; i < MAX_DMA_CHANNELS; i++) {
-               if (dint & DMAC_CHANNEL(i)) {
-                       struct dma_channel *channel = &dma_channels[i];
-
-                       /* Clear TC interrupt of channel i */
-                       writel(DMAC_CHANNEL(i), DMAC_ITCCR);
-                       writel(0, DMAC_ITCCR);
-
-                       if (channel->name && channel->irq_handler) {
-                               channel->irq_handler(i, channel->data);
-                       } else {
-                               /*
-                                * IRQ for an unregistered DMA channel:
-                                * let's clear the interrupts and disable it.
-                                */
-                               printk(KERN_WARNING "spurious IRQ for"
-                                               " DMA channel %d\n", i);
-                       }
-               }
-       }
-       return IRQ_HANDLED;
-}
-
-static irqreturn_t dma_err_handler(int irq, void *dev_id)
-{
-       int i, dint;
-
-       dint = readl(DMAC_IESR);
-       for (i = 0; i < MAX_DMA_CHANNELS; i++) {
-               if (dint & DMAC_CHANNEL(i)) {
-                       struct dma_channel *channel = &dma_channels[i];
-
-                       /* Clear Err interrupt of channel i */
-                       writel(DMAC_CHANNEL(i), DMAC_IECR);
-                       writel(0, DMAC_IECR);
-
-                       if (channel->name && channel->err_handler) {
-                               channel->err_handler(i, channel->data);
-                       } else {
-                               /*
-                                * IRQ for an unregistered DMA channel:
-                                * let's clear the interrupts and disable it.
-                                */
-                               printk(KERN_WARNING "spurious IRQ for"
-                                               " DMA channel %d\n", i);
-                       }
-               }
-       }
-       return IRQ_HANDLED;
-}
-
-int __init puv3_init_dma(void)
-{
-       int i, ret;
-
-       /* dma channel priorities on v8 processors:
-        * ch 0 - 1  <--> (0) DMA_PRIO_HIGH
-        * ch 2 - 3  <--> (1) DMA_PRIO_MEDIUM
-        * ch 4 - 5  <--> (2) DMA_PRIO_LOW
-        */
-       for (i = 0; i < MAX_DMA_CHANNELS; i++) {
-               puv3_stop_dma(i);
-               dma_channels[i].name = NULL;
-               dma_channels[i].prio = min((i & 0x7) >> 1, DMA_PRIO_LOW);
-       }
-
-       ret = request_irq(IRQ_DMA, dma_irq_handler, 0, "DMA", NULL);
-       if (ret) {
-               printk(KERN_CRIT "Can't register IRQ for DMA\n");
-               return ret;
-       }
-
-       ret = request_irq(IRQ_DMAERR, dma_err_handler, 0, "DMAERR", NULL);
-       if (ret) {
-               printk(KERN_CRIT "Can't register IRQ for DMAERR\n");
-               free_irq(IRQ_DMA, "DMA");
-               return ret;
-       }
-
-       return 0;
-}
-
-postcore_initcall(puv3_init_dma);