sh: dma-sh updates for multi IRQ and new SH-4A CPUs.
This adds DMA support for newer SH-4A CPUs, particularly SH7763/64/80/85.
This also enables multi IRQ support for platforms that have multiple
vectors bound to the same IRQ source.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig
index 0193636..57d95fc 100644
--- a/arch/sh/drivers/dma/Kconfig
+++ b/arch/sh/drivers/dma/Kconfig
@@ -12,10 +12,10 @@
config NR_ONCHIP_DMA_CHANNELS
int
depends on SH_DMA
- default "6" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721
- default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R
- default "12" if CPU_SUBTYPE_SH7780
- default "4"
+ default "4" if CPU_SUBTYPE_SH7750 || CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7750S
+ default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R || CPU_SUBTYPE_SH7760
+ default "12" if CPU_SUBTYPE_SH7723 || CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785
+ default "6"
help
This allows you to specify the number of channels that the on-chip
DMAC supports. This will be 4 for SH7750/SH7751 and 8 for the
diff --git a/arch/sh/drivers/dma/dma-sh.c b/arch/sh/drivers/dma/dma-sh.c
index 50887a5..ab7b18d 100644
--- a/arch/sh/drivers/dma/dma-sh.c
+++ b/arch/sh/drivers/dma/dma-sh.c
@@ -17,28 +17,23 @@
#include <mach-dreamcast/mach/dma.h>
#include <asm/dma.h>
#include <asm/io.h>
-#include "dma-sh.h"
+#include <asm/dma-sh.h>
-static int dmte_irq_map[] = {
- DMTE0_IRQ,
- DMTE1_IRQ,
- DMTE2_IRQ,
- DMTE3_IRQ,
-#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
- defined(CONFIG_CPU_SUBTYPE_SH7721) || \
- defined(CONFIG_CPU_SUBTYPE_SH7751R) || \
- defined(CONFIG_CPU_SUBTYPE_SH7760) || \
- defined(CONFIG_CPU_SUBTYPE_SH7709) || \
- defined(CONFIG_CPU_SUBTYPE_SH7780)
- DMTE4_IRQ,
- DMTE5_IRQ,
+#if defined(CONFIG_CPU_SUBTYPE_SH7763) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7764) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7780) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7785)
+#define DMAC_IRQ_MULTI 1
#endif
-#if defined(CONFIG_CPU_SUBTYPE_SH7751R) || \
- defined(CONFIG_CPU_SUBTYPE_SH7760) || \
- defined(CONFIG_CPU_SUBTYPE_SH7780)
- DMTE6_IRQ,
- DMTE7_IRQ,
+
+#if defined(DMAE1_IRQ)
+#define NR_DMAE 2
+#else
+#define NR_DMAE 1
#endif
+
+static const char *dmae_name[] = {
+ "DMAC Address Error0", "DMAC Address Error1"
};
static inline unsigned int get_dmte_irq(unsigned int chan)
@@ -46,7 +41,14 @@
unsigned int irq = 0;
if (chan < ARRAY_SIZE(dmte_irq_map))
irq = dmte_irq_map[chan];
+
+#if defined(DMAC_IRQ_MULTI)
+ if (irq > DMTE6_IRQ)
+ return DMTE6_IRQ;
+ return DMTE0_IRQ;
+#else
return irq;
+#endif
}
/*
@@ -59,7 +61,7 @@
*/
static inline unsigned int calc_xmit_shift(struct dma_channel *chan)
{
- u32 chcr = ctrl_inl(CHCR[chan->chan]);
+ u32 chcr = ctrl_inl(dma_base_addr[chan->chan] + CHCR);
return ts_shift[(chcr & CHCR_TS_MASK)>>CHCR_TS_SHIFT];
}
@@ -75,13 +77,13 @@
struct dma_channel *chan = dev_id;
u32 chcr;
- chcr = ctrl_inl(CHCR[chan->chan]);
+ chcr = ctrl_inl(dma_base_addr[chan->chan] + CHCR);
if (!(chcr & CHCR_TE))
return IRQ_NONE;
chcr &= ~(CHCR_IE | CHCR_DE);
- ctrl_outl(chcr, CHCR[chan->chan]);
+ ctrl_outl(chcr, (dma_base_addr[chan->chan] + CHCR));
wake_up(&chan->wait_queue);
@@ -94,7 +96,12 @@
return 0;
return request_irq(get_dmte_irq(chan->chan), dma_tei,
- IRQF_DISABLED, chan->dev_id, chan);
+#if defined(DMAC_IRQ_MULTI)
+ IRQF_SHARED,
+#else
+ IRQF_DISABLED,
+#endif
+ chan->dev_id, chan);
}
static void sh_dmac_free_dma(struct dma_channel *chan)
@@ -115,7 +122,7 @@
chan->flags &= ~DMA_TEI_CAPABLE;
}
- ctrl_outl(chcr, CHCR[chan->chan]);
+ ctrl_outl(chcr, (dma_base_addr[chan->chan] + CHCR));
chan->flags |= DMA_CONFIGURED;
return 0;
@@ -126,13 +133,13 @@
int irq;
u32 chcr;
- chcr = ctrl_inl(CHCR[chan->chan]);
+ chcr = ctrl_inl(dma_base_addr[chan->chan] + CHCR);
chcr |= CHCR_DE;
if (chan->flags & DMA_TEI_CAPABLE)
chcr |= CHCR_IE;
- ctrl_outl(chcr, CHCR[chan->chan]);
+ ctrl_outl(chcr, (dma_base_addr[chan->chan] + CHCR));
if (chan->flags & DMA_TEI_CAPABLE) {
irq = get_dmte_irq(chan->chan);
@@ -150,9 +157,9 @@
disable_irq(irq);
}
- chcr = ctrl_inl(CHCR[chan->chan]);
+ chcr = ctrl_inl(dma_base_addr[chan->chan] + CHCR);
chcr &= ~(CHCR_DE | CHCR_TE | CHCR_IE);
- ctrl_outl(chcr, CHCR[chan->chan]);
+ ctrl_outl(chcr, (dma_base_addr[chan->chan] + CHCR));
}
static int sh_dmac_xfer_dma(struct dma_channel *chan)
@@ -183,12 +190,13 @@
*/
if (chan->sar || (mach_is_dreamcast() &&
chan->chan == PVR2_CASCADE_CHAN))
- ctrl_outl(chan->sar, SAR[chan->chan]);
+ ctrl_outl(chan->sar, (dma_base_addr[chan->chan]+SAR));
if (chan->dar || (mach_is_dreamcast() &&
chan->chan == PVR2_CASCADE_CHAN))
- ctrl_outl(chan->dar, DAR[chan->chan]);
+ ctrl_outl(chan->dar, (dma_base_addr[chan->chan] + DAR));
- ctrl_outl(chan->count >> calc_xmit_shift(chan), DMATCR[chan->chan]);
+ ctrl_outl(chan->count >> calc_xmit_shift(chan),
+ (dma_base_addr[chan->chan] + TCR));
sh_dmac_enable_dma(chan);
@@ -197,36 +205,26 @@
static int sh_dmac_get_dma_residue(struct dma_channel *chan)
{
- if (!(ctrl_inl(CHCR[chan->chan]) & CHCR_DE))
+ if (!(ctrl_inl(dma_base_addr[chan->chan] + CHCR) & CHCR_DE))
return 0;
- return ctrl_inl(DMATCR[chan->chan]) << calc_xmit_shift(chan);
+ return ctrl_inl(dma_base_addr[chan->chan] + TCR)
+ << calc_xmit_shift(chan);
}
-#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
- defined(CONFIG_CPU_SUBTYPE_SH7721) || \
- defined(CONFIG_CPU_SUBTYPE_SH7780) || \
- defined(CONFIG_CPU_SUBTYPE_SH7709)
-#define dmaor_read_reg() ctrl_inw(DMAOR)
-#define dmaor_write_reg(data) ctrl_outw(data, DMAOR)
-#else
-#define dmaor_read_reg() ctrl_inl(DMAOR)
-#define dmaor_write_reg(data) ctrl_outl(data, DMAOR)
-#endif
-
-static inline int dmaor_reset(void)
+static inline int dmaor_reset(int no)
{
- unsigned long dmaor = dmaor_read_reg();
+ unsigned long dmaor = dmaor_read_reg(no);
/* Try to clear the error flags first, incase they are set */
dmaor &= ~(DMAOR_NMIF | DMAOR_AE);
- dmaor_write_reg(dmaor);
+ dmaor_write_reg(no, dmaor);
dmaor |= DMAOR_INIT;
- dmaor_write_reg(dmaor);
+ dmaor_write_reg(no, dmaor);
/* See if we got an error again */
- if ((dmaor_read_reg() & (DMAOR_AE | DMAOR_NMIF))) {
+ if ((dmaor_read_reg(no) & (DMAOR_AE | DMAOR_NMIF))) {
printk(KERN_ERR "dma-sh: Can't initialize DMAOR.\n");
return -EINVAL;
}
@@ -237,10 +235,33 @@
#if defined(CONFIG_CPU_SH4)
static irqreturn_t dma_err(int irq, void *dummy)
{
- dmaor_reset();
+#if defined(DMAC_IRQ_MULTI)
+ int cnt = 0;
+ switch (irq) {
+#if defined(DMTE6_IRQ) && defined(DMAE1_IRQ)
+ case DMTE6_IRQ:
+ cnt++;
+#endif
+ case DMTE0_IRQ:
+ if (dmaor_read_reg(cnt) & (DMAOR_NMIF | DMAOR_AE)) {
+ disable_irq(irq);
+ /* DMA multi and error IRQ */
+ return IRQ_HANDLED;
+ }
+ default:
+ return IRQ_NONE;
+ }
+#else
+ dmaor_reset(0);
+#if defined(CONFIG_CPU_SUBTYPE_SH7723) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7780) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7785)
+ dmaor_reset(1);
+#endif
disable_irq(irq);
return IRQ_HANDLED;
+#endif
}
#endif
@@ -259,24 +280,57 @@
.flags = DMAC_CHANNELS_TEI_CAPABLE,
};
+static unsigned int get_dma_error_irq(int n)
+{
+#if defined(DMAC_IRQ_MULTI)
+ return (n == 0) ? get_dmte_irq(0) : get_dmte_irq(6);
+#else
+ return (n == 0) ? DMAE0_IRQ :
+#if defined(DMAE1_IRQ)
+ DMAE1_IRQ;
+#else
+ -1;
+#endif
+#endif
+}
+
static int __init sh_dmac_init(void)
{
struct dma_info *info = &sh_dmac_info;
int i;
#ifdef CONFIG_CPU_SH4
- i = request_irq(DMAE_IRQ, dma_err, IRQF_DISABLED, "DMAC Address Error", 0);
- if (unlikely(i < 0))
- return i;
+ int n;
+
+ for (n = 0; n < NR_DMAE; n++) {
+ i = request_irq(get_dma_error_irq(n), dma_err,
+#if defined(DMAC_IRQ_MULTI)
+ IRQF_SHARED,
+#else
+ IRQF_DISABLED,
#endif
+ dmae_name[n], (void *)dmae_name[n]);
+ if (unlikely(i < 0)) {
+ printk(KERN_ERR "%s request_irq fail\n", dmae_name[n]);
+ return i;
+ }
+ }
+#endif /* CONFIG_CPU_SH4 */
/*
* Initialize DMAOR, and clean up any error flags that may have
* been set.
*/
- i = dmaor_reset();
+ i = dmaor_reset(0);
if (unlikely(i != 0))
return i;
+#if defined(CONFIG_CPU_SUBTYPE_SH7723) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7780) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7785)
+ i = dmaor_reset(1);
+ if (unlikely(i != 0))
+ return i;
+#endif
return register_dmac(info);
}
@@ -284,8 +338,12 @@
static void __exit sh_dmac_exit(void)
{
#ifdef CONFIG_CPU_SH4
- free_irq(DMAE_IRQ, 0);
-#endif
+ int n;
+
+ for (n = 0; n < NR_DMAE; n++) {
+ free_irq(get_dma_error_irq(n), (void *)dmae_name[n]);
+ }
+#endif /* CONFIG_CPU_SH4 */
unregister_dmac(&sh_dmac_info);
}
diff --git a/arch/sh/drivers/dma/dma-sh.h b/arch/sh/drivers/dma/dma-sh.h
deleted file mode 100644
index 05fecd5..0000000
--- a/arch/sh/drivers/dma/dma-sh.h
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * arch/sh/drivers/dma/dma-sh.h
- *
- * Copyright (C) 2000 Takashi YOSHII
- * Copyright (C) 2003 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#ifndef __DMA_SH_H
-#define __DMA_SH_H
-
-#include <cpu/dma.h>
-
-/* Definitions for the SuperH DMAC */
-#define REQ_L 0x00000000
-#define REQ_E 0x00080000
-#define RACK_H 0x00000000
-#define RACK_L 0x00040000
-#define ACK_R 0x00000000
-#define ACK_W 0x00020000
-#define ACK_H 0x00000000
-#define ACK_L 0x00010000
-#define DM_INC 0x00004000
-#define DM_DEC 0x00008000
-#define SM_INC 0x00001000
-#define SM_DEC 0x00002000
-#define RS_IN 0x00000200
-#define RS_OUT 0x00000300
-#define TS_BLK 0x00000040
-#define TM_BUR 0x00000020
-#define CHCR_DE 0x00000001
-#define CHCR_TE 0x00000002
-#define CHCR_IE 0x00000004
-
-/* DMAOR definitions */
-#define DMAOR_AE 0x00000004
-#define DMAOR_NMIF 0x00000002
-#define DMAOR_DME 0x00000001
-
-/*
- * Define the default configuration for dual address memory-memory transfer.
- * The 0x400 value represents auto-request, external->external.
- */
-#define RS_DUAL (DM_INC | SM_INC | 0x400 | TS_32)
-
-#define MAX_DMAC_CHANNELS (CONFIG_NR_ONCHIP_DMA_CHANNELS)
-
-/*
- * Subtypes that have fewer channels than this simply need to change
- * CONFIG_NR_ONCHIP_DMA_CHANNELS. Likewise, subtypes with a larger number
- * of channels should expand on this.
- *
- * For most subtypes we can easily figure these values out with some
- * basic calculation, unfortunately on other subtypes these are more
- * scattered, so we just leave it unrolled for simplicity.
- */
-#define SAR ((unsigned long[]){SH_DMAC_BASE + 0x00, SH_DMAC_BASE + 0x10, \
- SH_DMAC_BASE + 0x20, SH_DMAC_BASE + 0x30, \
- SH_DMAC_BASE + 0x50, SH_DMAC_BASE + 0x60})
-#define DAR ((unsigned long[]){SH_DMAC_BASE + 0x04, SH_DMAC_BASE + 0x14, \
- SH_DMAC_BASE + 0x24, SH_DMAC_BASE + 0x34, \
- SH_DMAC_BASE + 0x54, SH_DMAC_BASE + 0x64})
-#define DMATCR ((unsigned long[]){SH_DMAC_BASE + 0x08, SH_DMAC_BASE + 0x18, \
- SH_DMAC_BASE + 0x28, SH_DMAC_BASE + 0x38, \
- SH_DMAC_BASE + 0x58, SH_DMAC_BASE + 0x68})
-#define CHCR ((unsigned long[]){SH_DMAC_BASE + 0x0c, SH_DMAC_BASE + 0x1c, \
- SH_DMAC_BASE + 0x2c, SH_DMAC_BASE + 0x3c, \
- SH_DMAC_BASE + 0x5c, SH_DMAC_BASE + 0x6c})
-
-#define DMAOR (SH_DMAC_BASE + 0x40)
-
-#endif /* __DMA_SH_H */
-