ARM: s3c64xx: Remove legacy DMA driver
Since support for generic PL08x DMA engine driver has been added, there is no need to keep the old legacy driver, so this patch removes it. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Tomasz Figa
Mark Brown
parent
d37f7617bd
commit
15469ed37f
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@ -22,11 +22,6 @@ config S3C64XX_PL080
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select AMBA_PL08X
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select SAMSUNG_DMADEV
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config S3C64XX_DMA
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bool "S3C64XX DMA using legacy S3C DMA API"
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select S3C_DMA
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depends on !S3C64XX_PL080
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config S3C64XX_SETUP_SDHCI
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bool
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select S3C64XX_SETUP_SDHCI_GPIO
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@ -26,7 +26,6 @@ obj-$(CONFIG_CPU_IDLE) += cpuidle.o
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# DMA support
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obj-$(CONFIG_S3C64XX_DMA) += dma.o
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obj-$(CONFIG_S3C64XX_PL080) += pl080.o
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# Device support
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@ -1,762 +0,0 @@
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/* linux/arch/arm/plat-s3c64xx/dma.c
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*
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* Copyright 2009 Openmoko, Inc.
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* Copyright 2009 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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* http://armlinux.simtec.co.uk/
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*
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* S3C64XX DMA core
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* NOTE: Code in this file is not used when booting with Device Tree support.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/dmapool.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/amba/pl080.h>
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#include <linux/of.h>
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#include <mach/dma.h>
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#include <mach/map.h>
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#include <mach/irqs.h>
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#include "regs-sys.h"
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/* dma channel state information */
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struct s3c64xx_dmac {
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struct device dev;
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struct clk *clk;
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void __iomem *regs;
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struct s3c2410_dma_chan *channels;
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enum dma_ch chanbase;
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};
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/* pool to provide LLI buffers */
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static struct dma_pool *dma_pool;
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/* Debug configuration and code */
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static unsigned char debug_show_buffs = 0;
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static void dbg_showchan(struct s3c2410_dma_chan *chan)
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{
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pr_debug("DMA%d: %08x->%08x L %08x C %08x,%08x S %08x\n",
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chan->number,
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readl(chan->regs + PL080_CH_SRC_ADDR),
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readl(chan->regs + PL080_CH_DST_ADDR),
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readl(chan->regs + PL080_CH_LLI),
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readl(chan->regs + PL080_CH_CONTROL),
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readl(chan->regs + PL080S_CH_CONTROL2),
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readl(chan->regs + PL080S_CH_CONFIG));
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}
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static void show_lli(struct pl080s_lli *lli)
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{
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pr_debug("LLI[%p] %08x->%08x, NL %08x C %08x,%08x\n",
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lli, lli->src_addr, lli->dst_addr, lli->next_lli,
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lli->control0, lli->control1);
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}
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static void dbg_showbuffs(struct s3c2410_dma_chan *chan)
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{
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struct s3c64xx_dma_buff *ptr;
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struct s3c64xx_dma_buff *end;
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pr_debug("DMA%d: buffs next %p, curr %p, end %p\n",
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chan->number, chan->next, chan->curr, chan->end);
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ptr = chan->next;
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end = chan->end;
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if (debug_show_buffs) {
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for (; ptr != NULL; ptr = ptr->next) {
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pr_debug("DMA%d: %08x ",
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chan->number, ptr->lli_dma);
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show_lli(ptr->lli);
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}
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}
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}
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/* End of Debug */
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static struct s3c2410_dma_chan *s3c64xx_dma_map_channel(unsigned int channel)
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{
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struct s3c2410_dma_chan *chan;
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unsigned int start, offs;
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start = 0;
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if (channel >= DMACH_PCM1_TX)
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start = 8;
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for (offs = 0; offs < 8; offs++) {
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chan = &s3c2410_chans[start + offs];
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if (!chan->in_use)
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goto found;
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}
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return NULL;
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found:
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s3c_dma_chan_map[channel] = chan;
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return chan;
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}
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int s3c2410_dma_config(enum dma_ch channel, int xferunit)
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{
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struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
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if (chan == NULL)
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return -EINVAL;
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switch (xferunit) {
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case 1:
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chan->hw_width = 0;
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break;
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case 2:
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chan->hw_width = 1;
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break;
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case 4:
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chan->hw_width = 2;
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break;
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default:
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printk(KERN_ERR "%s: illegal width %d\n", __func__, xferunit);
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return -EINVAL;
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}
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return 0;
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}
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EXPORT_SYMBOL(s3c2410_dma_config);
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static void s3c64xx_dma_fill_lli(struct s3c2410_dma_chan *chan,
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struct pl080s_lli *lli,
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dma_addr_t data, int size)
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{
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dma_addr_t src, dst;
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u32 control0, control1;
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switch (chan->source) {
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case DMA_FROM_DEVICE:
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src = chan->dev_addr;
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dst = data;
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control0 = PL080_CONTROL_SRC_AHB2;
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control0 |= PL080_CONTROL_DST_INCR;
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break;
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case DMA_TO_DEVICE:
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src = data;
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dst = chan->dev_addr;
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control0 = PL080_CONTROL_DST_AHB2;
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control0 |= PL080_CONTROL_SRC_INCR;
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break;
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default:
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BUG();
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}
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/* note, we do not currently setup any of the burst controls */
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control1 = size >> chan->hw_width; /* size in no of xfers */
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control0 |= PL080_CONTROL_PROT_SYS; /* always in priv. mode */
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control0 |= PL080_CONTROL_TC_IRQ_EN; /* always fire IRQ */
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control0 |= (u32)chan->hw_width << PL080_CONTROL_DWIDTH_SHIFT;
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control0 |= (u32)chan->hw_width << PL080_CONTROL_SWIDTH_SHIFT;
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lli->src_addr = src;
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lli->dst_addr = dst;
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lli->next_lli = 0;
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lli->control0 = control0;
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lli->control1 = control1;
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}
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static void s3c64xx_lli_to_regs(struct s3c2410_dma_chan *chan,
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struct pl080s_lli *lli)
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{
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void __iomem *regs = chan->regs;
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pr_debug("%s: LLI %p => regs\n", __func__, lli);
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show_lli(lli);
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writel(lli->src_addr, regs + PL080_CH_SRC_ADDR);
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writel(lli->dst_addr, regs + PL080_CH_DST_ADDR);
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writel(lli->next_lli, regs + PL080_CH_LLI);
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writel(lli->control0, regs + PL080_CH_CONTROL);
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writel(lli->control1, regs + PL080S_CH_CONTROL2);
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}
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static int s3c64xx_dma_start(struct s3c2410_dma_chan *chan)
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{
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struct s3c64xx_dmac *dmac = chan->dmac;
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u32 config;
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u32 bit = chan->bit;
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dbg_showchan(chan);
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pr_debug("%s: clearing interrupts\n", __func__);
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/* clear interrupts */
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writel(bit, dmac->regs + PL080_TC_CLEAR);
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writel(bit, dmac->regs + PL080_ERR_CLEAR);
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pr_debug("%s: starting channel\n", __func__);
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config = readl(chan->regs + PL080S_CH_CONFIG);
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config |= PL080_CONFIG_ENABLE;
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config &= ~PL080_CONFIG_HALT;
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pr_debug("%s: writing config %08x\n", __func__, config);
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writel(config, chan->regs + PL080S_CH_CONFIG);
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return 0;
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}
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static int s3c64xx_dma_stop(struct s3c2410_dma_chan *chan)
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{
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u32 config;
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int timeout;
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pr_debug("%s: stopping channel\n", __func__);
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dbg_showchan(chan);
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config = readl(chan->regs + PL080S_CH_CONFIG);
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config |= PL080_CONFIG_HALT;
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writel(config, chan->regs + PL080S_CH_CONFIG);
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timeout = 1000;
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do {
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config = readl(chan->regs + PL080S_CH_CONFIG);
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pr_debug("%s: %d - config %08x\n", __func__, timeout, config);
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if (config & PL080_CONFIG_ACTIVE)
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udelay(10);
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else
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break;
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} while (--timeout > 0);
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if (config & PL080_CONFIG_ACTIVE) {
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printk(KERN_ERR "%s: channel still active\n", __func__);
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return -EFAULT;
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}
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config = readl(chan->regs + PL080S_CH_CONFIG);
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config &= ~PL080_CONFIG_ENABLE;
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writel(config, chan->regs + PL080S_CH_CONFIG);
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return 0;
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}
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static inline void s3c64xx_dma_bufffdone(struct s3c2410_dma_chan *chan,
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struct s3c64xx_dma_buff *buf,
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enum s3c2410_dma_buffresult result)
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{
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if (chan->callback_fn != NULL)
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(chan->callback_fn)(chan, buf->pw, 0, result);
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}
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static void s3c64xx_dma_freebuff(struct s3c64xx_dma_buff *buff)
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{
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dma_pool_free(dma_pool, buff->lli, buff->lli_dma);
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kfree(buff);
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}
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static int s3c64xx_dma_flush(struct s3c2410_dma_chan *chan)
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{
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struct s3c64xx_dma_buff *buff, *next;
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u32 config;
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dbg_showchan(chan);
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pr_debug("%s: flushing channel\n", __func__);
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config = readl(chan->regs + PL080S_CH_CONFIG);
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config &= ~PL080_CONFIG_ENABLE;
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writel(config, chan->regs + PL080S_CH_CONFIG);
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/* dump all the buffers associated with this channel */
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for (buff = chan->curr; buff != NULL; buff = next) {
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next = buff->next;
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pr_debug("%s: buff %p (next %p)\n", __func__, buff, buff->next);
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s3c64xx_dma_bufffdone(chan, buff, S3C2410_RES_ABORT);
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s3c64xx_dma_freebuff(buff);
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}
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chan->curr = chan->next = chan->end = NULL;
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return 0;
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}
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int s3c2410_dma_ctrl(enum dma_ch channel, enum s3c2410_chan_op op)
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{
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struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
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WARN_ON(!chan);
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if (!chan)
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return -EINVAL;
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switch (op) {
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case S3C2410_DMAOP_START:
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return s3c64xx_dma_start(chan);
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case S3C2410_DMAOP_STOP:
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return s3c64xx_dma_stop(chan);
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case S3C2410_DMAOP_FLUSH:
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return s3c64xx_dma_flush(chan);
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/* believe PAUSE/RESUME are no-ops */
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case S3C2410_DMAOP_PAUSE:
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case S3C2410_DMAOP_RESUME:
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case S3C2410_DMAOP_STARTED:
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case S3C2410_DMAOP_TIMEOUT:
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return 0;
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}
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return -ENOENT;
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}
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EXPORT_SYMBOL(s3c2410_dma_ctrl);
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/* s3c2410_dma_enque
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*
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*/
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int s3c2410_dma_enqueue(enum dma_ch channel, void *id,
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dma_addr_t data, int size)
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{
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struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
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struct s3c64xx_dma_buff *next;
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struct s3c64xx_dma_buff *buff;
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struct pl080s_lli *lli;
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unsigned long flags;
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int ret;
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WARN_ON(!chan);
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if (!chan)
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return -EINVAL;
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buff = kzalloc(sizeof(struct s3c64xx_dma_buff), GFP_ATOMIC);
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if (!buff) {
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printk(KERN_ERR "%s: no memory for buffer\n", __func__);
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return -ENOMEM;
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}
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lli = dma_pool_alloc(dma_pool, GFP_ATOMIC, &buff->lli_dma);
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if (!lli) {
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printk(KERN_ERR "%s: no memory for lli\n", __func__);
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ret = -ENOMEM;
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goto err_buff;
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}
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pr_debug("%s: buff %p, dp %08x lli (%p, %08x) %d\n",
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__func__, buff, data, lli, (u32)buff->lli_dma, size);
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buff->lli = lli;
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buff->pw = id;
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s3c64xx_dma_fill_lli(chan, lli, data, size);
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local_irq_save(flags);
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if ((next = chan->next) != NULL) {
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struct s3c64xx_dma_buff *end = chan->end;
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struct pl080s_lli *endlli = end->lli;
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pr_debug("enquing onto channel\n");
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end->next = buff;
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endlli->next_lli = buff->lli_dma;
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if (chan->flags & S3C2410_DMAF_CIRCULAR) {
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struct s3c64xx_dma_buff *curr = chan->curr;
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lli->next_lli = curr->lli_dma;
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}
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if (next == chan->curr) {
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writel(buff->lli_dma, chan->regs + PL080_CH_LLI);
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chan->next = buff;
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}
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show_lli(endlli);
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chan->end = buff;
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} else {
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pr_debug("enquing onto empty channel\n");
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chan->curr = buff;
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chan->next = buff;
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chan->end = buff;
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s3c64xx_lli_to_regs(chan, lli);
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}
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local_irq_restore(flags);
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show_lli(lli);
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dbg_showchan(chan);
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dbg_showbuffs(chan);
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return 0;
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err_buff:
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kfree(buff);
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return ret;
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}
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EXPORT_SYMBOL(s3c2410_dma_enqueue);
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int s3c2410_dma_devconfig(enum dma_ch channel,
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enum dma_data_direction source,
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unsigned long devaddr)
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{
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struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
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u32 peripheral;
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u32 config = 0;
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pr_debug("%s: channel %d, source %d, dev %08lx, chan %p\n",
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__func__, channel, source, devaddr, chan);
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WARN_ON(!chan);
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if (!chan)
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return -EINVAL;
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peripheral = (chan->peripheral & 0xf);
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chan->source = source;
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chan->dev_addr = devaddr;
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pr_debug("%s: peripheral %d\n", __func__, peripheral);
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switch (source) {
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case DMA_FROM_DEVICE:
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config = 2 << PL080_CONFIG_FLOW_CONTROL_SHIFT;
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config |= peripheral << PL080_CONFIG_SRC_SEL_SHIFT;
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break;
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case DMA_TO_DEVICE:
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config = 1 << PL080_CONFIG_FLOW_CONTROL_SHIFT;
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config |= peripheral << PL080_CONFIG_DST_SEL_SHIFT;
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break;
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default:
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printk(KERN_ERR "%s: bad source\n", __func__);
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return -EINVAL;
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}
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/* allow TC and ERR interrupts */
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config |= PL080_CONFIG_TC_IRQ_MASK;
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config |= PL080_CONFIG_ERR_IRQ_MASK;
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pr_debug("%s: config %08x\n", __func__, config);
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writel(config, chan->regs + PL080S_CH_CONFIG);
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return 0;
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}
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EXPORT_SYMBOL(s3c2410_dma_devconfig);
|
||||
|
||||
|
||||
int s3c2410_dma_getposition(enum dma_ch channel,
|
||||
dma_addr_t *src, dma_addr_t *dst)
|
||||
{
|
||||
struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
|
||||
|
||||
WARN_ON(!chan);
|
||||
if (!chan)
|
||||
return -EINVAL;
|
||||
|
||||
if (src != NULL)
|
||||
*src = readl(chan->regs + PL080_CH_SRC_ADDR);
|
||||
|
||||
if (dst != NULL)
|
||||
*dst = readl(chan->regs + PL080_CH_DST_ADDR);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(s3c2410_dma_getposition);
|
||||
|
||||
/* s3c2410_request_dma
|
||||
*
|
||||
* get control of an dma channel
|
||||
*/
|
||||
|
||||
int s3c2410_dma_request(enum dma_ch channel,
|
||||
struct s3c2410_dma_client *client,
|
||||
void *dev)
|
||||
{
|
||||
struct s3c2410_dma_chan *chan;
|
||||
unsigned long flags;
|
||||
|
||||
pr_debug("dma%d: s3c2410_request_dma: client=%s, dev=%p\n",
|
||||
channel, client->name, dev);
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
chan = s3c64xx_dma_map_channel(channel);
|
||||
if (chan == NULL) {
|
||||
local_irq_restore(flags);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
dbg_showchan(chan);
|
||||
|
||||
chan->client = client;
|
||||
chan->in_use = 1;
|
||||
chan->peripheral = channel;
|
||||
chan->flags = 0;
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
/* need to setup */
|
||||
|
||||
pr_debug("%s: channel initialised, %p\n", __func__, chan);
|
||||
|
||||
return chan->number | DMACH_LOW_LEVEL;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(s3c2410_dma_request);
|
||||
|
||||
/* s3c2410_dma_free
|
||||
*
|
||||
* release the given channel back to the system, will stop and flush
|
||||
* any outstanding transfers, and ensure the channel is ready for the
|
||||
* next claimant.
|
||||
*
|
||||
* Note, although a warning is currently printed if the freeing client
|
||||
* info is not the same as the registrant's client info, the free is still
|
||||
* allowed to go through.
|
||||
*/
|
||||
|
||||
int s3c2410_dma_free(enum dma_ch channel, struct s3c2410_dma_client *client)
|
||||
{
|
||||
struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
|
||||
unsigned long flags;
|
||||
|
||||
if (chan == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
if (chan->client != client) {
|
||||
printk(KERN_WARNING "dma%d: possible free from different client (channel %p, passed %p)\n",
|
||||
channel, chan->client, client);
|
||||
}
|
||||
|
||||
/* sort out stopping and freeing the channel */
|
||||
|
||||
|
||||
chan->client = NULL;
|
||||
chan->in_use = 0;
|
||||
|
||||
if (!(channel & DMACH_LOW_LEVEL))
|
||||
s3c_dma_chan_map[channel] = NULL;
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(s3c2410_dma_free);
|
||||
|
||||
static irqreturn_t s3c64xx_dma_irq(int irq, void *pw)
|
||||
{
|
||||
struct s3c64xx_dmac *dmac = pw;
|
||||
struct s3c2410_dma_chan *chan;
|
||||
enum s3c2410_dma_buffresult res;
|
||||
u32 tcstat, errstat;
|
||||
u32 bit;
|
||||
int offs;
|
||||
|
||||
tcstat = readl(dmac->regs + PL080_TC_STATUS);
|
||||
errstat = readl(dmac->regs + PL080_ERR_STATUS);
|
||||
|
||||
for (offs = 0, bit = 1; offs < 8; offs++, bit <<= 1) {
|
||||
struct s3c64xx_dma_buff *buff;
|
||||
|
||||
if (!(errstat & bit) && !(tcstat & bit))
|
||||
continue;
|
||||
|
||||
chan = dmac->channels + offs;
|
||||
res = S3C2410_RES_ERR;
|
||||
|
||||
if (tcstat & bit) {
|
||||
writel(bit, dmac->regs + PL080_TC_CLEAR);
|
||||
res = S3C2410_RES_OK;
|
||||
}
|
||||
|
||||
if (errstat & bit)
|
||||
writel(bit, dmac->regs + PL080_ERR_CLEAR);
|
||||
|
||||
/* 'next' points to the buffer that is next to the
|
||||
* currently active buffer.
|
||||
* For CIRCULAR queues, 'next' will be same as 'curr'
|
||||
* when 'end' is the active buffer.
|
||||
*/
|
||||
buff = chan->curr;
|
||||
while (buff && buff != chan->next
|
||||
&& buff->next != chan->next)
|
||||
buff = buff->next;
|
||||
|
||||
if (!buff)
|
||||
BUG();
|
||||
|
||||
if (buff == chan->next)
|
||||
buff = chan->end;
|
||||
|
||||
s3c64xx_dma_bufffdone(chan, buff, res);
|
||||
|
||||
/* Free the node and update curr, if non-circular queue */
|
||||
if (!(chan->flags & S3C2410_DMAF_CIRCULAR)) {
|
||||
chan->curr = buff->next;
|
||||
s3c64xx_dma_freebuff(buff);
|
||||
}
|
||||
|
||||
/* Update 'next' */
|
||||
buff = chan->next;
|
||||
if (chan->next == chan->end) {
|
||||
chan->next = chan->curr;
|
||||
if (!(chan->flags & S3C2410_DMAF_CIRCULAR))
|
||||
chan->end = NULL;
|
||||
} else {
|
||||
chan->next = buff->next;
|
||||
}
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static struct bus_type dma_subsys = {
|
||||
.name = "s3c64xx-dma",
|
||||
.dev_name = "s3c64xx-dma",
|
||||
};
|
||||
|
||||
static int s3c64xx_dma_init1(int chno, enum dma_ch chbase,
|
||||
int irq, unsigned int base)
|
||||
{
|
||||
struct s3c2410_dma_chan *chptr = &s3c2410_chans[chno];
|
||||
struct s3c64xx_dmac *dmac;
|
||||
char clkname[16];
|
||||
void __iomem *regs;
|
||||
void __iomem *regptr;
|
||||
int err, ch;
|
||||
|
||||
dmac = kzalloc(sizeof(struct s3c64xx_dmac), GFP_KERNEL);
|
||||
if (!dmac) {
|
||||
printk(KERN_ERR "%s: failed to alloc mem\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
dmac->dev.id = chno / 8;
|
||||
dmac->dev.bus = &dma_subsys;
|
||||
|
||||
err = device_register(&dmac->dev);
|
||||
if (err) {
|
||||
printk(KERN_ERR "%s: failed to register device\n", __func__);
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
regs = ioremap(base, 0x200);
|
||||
if (!regs) {
|
||||
printk(KERN_ERR "%s: failed to ioremap()\n", __func__);
|
||||
err = -ENXIO;
|
||||
goto err_dev;
|
||||
}
|
||||
|
||||
snprintf(clkname, sizeof(clkname), "dma%d", dmac->dev.id);
|
||||
|
||||
dmac->clk = clk_get(NULL, clkname);
|
||||
if (IS_ERR(dmac->clk)) {
|
||||
printk(KERN_ERR "%s: failed to get clock %s\n", __func__, clkname);
|
||||
err = PTR_ERR(dmac->clk);
|
||||
goto err_map;
|
||||
}
|
||||
|
||||
clk_prepare_enable(dmac->clk);
|
||||
|
||||
dmac->regs = regs;
|
||||
dmac->chanbase = chbase;
|
||||
dmac->channels = chptr;
|
||||
|
||||
err = request_irq(irq, s3c64xx_dma_irq, 0, "DMA", dmac);
|
||||
if (err < 0) {
|
||||
printk(KERN_ERR "%s: failed to get irq\n", __func__);
|
||||
goto err_clk;
|
||||
}
|
||||
|
||||
regptr = regs + PL080_Cx_BASE(0);
|
||||
|
||||
for (ch = 0; ch < 8; ch++, chptr++) {
|
||||
pr_debug("%s: registering DMA %d (%p)\n",
|
||||
__func__, chno + ch, regptr);
|
||||
|
||||
chptr->bit = 1 << ch;
|
||||
chptr->number = chno + ch;
|
||||
chptr->dmac = dmac;
|
||||
chptr->regs = regptr;
|
||||
regptr += PL080_Cx_STRIDE;
|
||||
}
|
||||
|
||||
/* for the moment, permanently enable the controller */
|
||||
writel(PL080_CONFIG_ENABLE, regs + PL080_CONFIG);
|
||||
|
||||
printk(KERN_INFO "PL080: IRQ %d, at %p, channels %d..%d\n",
|
||||
irq, regs, chno, chno+8);
|
||||
|
||||
return 0;
|
||||
|
||||
err_clk:
|
||||
clk_disable_unprepare(dmac->clk);
|
||||
clk_put(dmac->clk);
|
||||
err_map:
|
||||
iounmap(regs);
|
||||
err_dev:
|
||||
device_unregister(&dmac->dev);
|
||||
err_alloc:
|
||||
kfree(dmac);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __init s3c64xx_dma_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* This driver is not supported when booting with device tree. */
|
||||
if (of_have_populated_dt())
|
||||
return -ENODEV;
|
||||
|
||||
printk(KERN_INFO "%s: Registering DMA channels\n", __func__);
|
||||
|
||||
dma_pool = dma_pool_create("DMA-LLI", NULL, sizeof(struct pl080s_lli), 16, 0);
|
||||
if (!dma_pool) {
|
||||
printk(KERN_ERR "%s: failed to create pool\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
ret = subsys_system_register(&dma_subsys, NULL);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "%s: failed to create subsys\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Set all DMA configuration to be DMA, not SDMA */
|
||||
writel(0xffffff, S3C64XX_SDMA_SEL);
|
||||
|
||||
/* Register standard DMA controllers */
|
||||
s3c64xx_dma_init1(0, DMACH_UART0, IRQ_DMA0, 0x75000000);
|
||||
s3c64xx_dma_init1(8, DMACH_PCM1_TX, IRQ_DMA1, 0x75100000);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
arch_initcall(s3c64xx_dma_init);
|
||||
|
|
@ -11,127 +11,6 @@
|
|||
#ifndef __ASM_ARCH_DMA_H
|
||||
#define __ASM_ARCH_DMA_H __FILE__
|
||||
|
||||
#ifdef CONFIG_S3C64XX_DMA
|
||||
|
||||
#define S3C_DMA_CHANNELS (16)
|
||||
|
||||
/* see mach-s3c2410/dma.h for notes on dma channel numbers */
|
||||
|
||||
/* Note, for the S3C64XX architecture we keep the DMACH_
|
||||
* defines in the order they are allocated to [S]DMA0/[S]DMA1
|
||||
* so that is easy to do DHACH_ -> DMA controller conversion
|
||||
*/
|
||||
enum dma_ch {
|
||||
/* DMA0/SDMA0 */
|
||||
DMACH_UART0 = 0,
|
||||
DMACH_UART0_SRC2,
|
||||
DMACH_UART1,
|
||||
DMACH_UART1_SRC2,
|
||||
DMACH_UART2,
|
||||
DMACH_UART2_SRC2,
|
||||
DMACH_UART3,
|
||||
DMACH_UART3_SRC2,
|
||||
DMACH_PCM0_TX,
|
||||
DMACH_PCM0_RX,
|
||||
DMACH_I2S0_OUT,
|
||||
DMACH_I2S0_IN,
|
||||
DMACH_SPI0_TX,
|
||||
DMACH_SPI0_RX,
|
||||
DMACH_HSI_I2SV40_TX,
|
||||
DMACH_HSI_I2SV40_RX,
|
||||
|
||||
/* DMA1/SDMA1 */
|
||||
DMACH_PCM1_TX = 16,
|
||||
DMACH_PCM1_RX,
|
||||
DMACH_I2S1_OUT,
|
||||
DMACH_I2S1_IN,
|
||||
DMACH_SPI1_TX,
|
||||
DMACH_SPI1_RX,
|
||||
DMACH_AC97_PCMOUT,
|
||||
DMACH_AC97_PCMIN,
|
||||
DMACH_AC97_MICIN,
|
||||
DMACH_PWM,
|
||||
DMACH_IRDA,
|
||||
DMACH_EXTERNAL,
|
||||
DMACH_RES1,
|
||||
DMACH_RES2,
|
||||
DMACH_SECURITY_RX, /* SDMA1 only */
|
||||
DMACH_SECURITY_TX, /* SDMA1 only */
|
||||
DMACH_MAX /* the end */
|
||||
};
|
||||
|
||||
static inline bool samsung_dma_has_circular(void)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline bool samsung_dma_is_dmadev(void)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
#define S3C2410_DMAF_CIRCULAR (1 << 0)
|
||||
|
||||
#include <plat/dma.h>
|
||||
|
||||
#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
|
||||
|
||||
struct s3c64xx_dma_buff;
|
||||
|
||||
/** s3c64xx_dma_buff - S3C64XX DMA buffer descriptor
|
||||
* @next: Pointer to next buffer in queue or ring.
|
||||
* @pw: Client provided identifier
|
||||
* @lli: Pointer to hardware descriptor this buffer is associated with.
|
||||
* @lli_dma: Hardare address of the descriptor.
|
||||
*/
|
||||
struct s3c64xx_dma_buff {
|
||||
struct s3c64xx_dma_buff *next;
|
||||
|
||||
void *pw;
|
||||
struct pl080s_lli *lli;
|
||||
dma_addr_t lli_dma;
|
||||
};
|
||||
|
||||
struct s3c64xx_dmac;
|
||||
|
||||
struct s3c2410_dma_chan {
|
||||
unsigned char number; /* number of this dma channel */
|
||||
unsigned char in_use; /* channel allocated */
|
||||
unsigned char bit; /* bit for enable/disable/etc */
|
||||
unsigned char hw_width;
|
||||
unsigned char peripheral;
|
||||
|
||||
unsigned int flags;
|
||||
enum dma_data_direction source;
|
||||
|
||||
|
||||
dma_addr_t dev_addr;
|
||||
|
||||
struct s3c2410_dma_client *client;
|
||||
struct s3c64xx_dmac *dmac; /* pointer to controller */
|
||||
|
||||
void __iomem *regs;
|
||||
|
||||
/* cdriver callbacks */
|
||||
s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */
|
||||
s3c2410_dma_opfn_t op_fn; /* channel op callback */
|
||||
|
||||
/* buffer list and information */
|
||||
struct s3c64xx_dma_buff *curr; /* current dma buffer */
|
||||
struct s3c64xx_dma_buff *next; /* next buffer to load */
|
||||
struct s3c64xx_dma_buff *end; /* end of queue */
|
||||
|
||||
/* note, when channel is running in circular mode, curr is the
|
||||
* first buffer enqueued, end is the last and curr is where the
|
||||
* last buffer-done event is set-at. The buffers are not freed
|
||||
* and the last buffer hardware descriptor points back to the
|
||||
* first.
|
||||
*/
|
||||
};
|
||||
|
||||
#include <plat/dma-core.h>
|
||||
|
||||
#else
|
||||
|
||||
#define S3C64XX_DMA_CHAN(name) ((unsigned long)(name))
|
||||
|
||||
/* DMA0/SDMA0 */
|
||||
|
|
@ -189,6 +68,4 @@ static inline bool samsung_dma_is_dmadev(void)
|
|||
#include <linux/amba/pl08x.h>
|
||||
#include <plat/dma-ops.h>
|
||||
|
||||
#endif
|
||||
|
||||
#endif /* __ASM_ARCH_IRQ_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue