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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-07 15:47:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-07 15:47:19 -0800
commit4a31c08d2fecc74a630653828f5388fbb037f8c2 (patch)
treec3baf80157bab2cf6bdf3d26772001e43233aad6 /drivers/dma
parent2ddb3b15f1b46836c61cfac5b00d8f08a24236e6 (diff)
parent0272282f7cffb469cd2676dcb6e58bc942fcf8a8 (diff)
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (26 commits) sh: Convert sh to use read/update_persistent_clock sh: Move PMB debugfs entry initialization to later stage sh: Fix up flush_cache_vmap() on SMP. sh: fix up MMU reset with variable PMB mapping sizes. sh: establish PMB mappings for NUMA nodes. sh: check for existing mappings for bolted PMB entries. sh: fixed virt/phys mapping helpers for PMB. sh: make pmb iomapping configurable. sh: reworked dynamic PMB mapping. sh: Fix up cpumask_of_pcibus() for the NUMA build. serial: sh-sci: Tidy up build warnings. sh: Fix up ctrl_read/write stragglers in migor setup. serial: sh-sci: Add DMA support. dmaengine: shdma: extend .device_terminate_all() to record partial transfer sh: merge sh7722 and sh7724 DMA register definitions sh: activate runtime PM for dmaengine on sh7722 and sh7724 dmaengine: shdma: add runtime PM support. dmaengine: shdma: separate DMA headers. dmaengine: shdma: convert to platform device resources dmaengine: shdma: fix DMA error handling. ...
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/shdma.c500
-rw-r--r--drivers/dma/shdma.h26
2 files changed, 324 insertions, 202 deletions
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index b75ce8b84c46..5d17e09cb625 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -24,8 +24,10 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
-#include <cpu/dma.h>
-#include <asm/dma-sh.h>
+#include <linux/pm_runtime.h>
+
+#include <asm/dmaengine.h>
+
#include "shdma.h"
/* DMA descriptor control */
@@ -38,30 +40,32 @@ enum sh_dmae_desc_status {
};
#define NR_DESCS_PER_CHANNEL 32
-/*
- * Define the default configuration for dual address memory-memory transfer.
- * The 0x400 value represents auto-request, external->external.
- *
- * And this driver set 4byte burst mode.
- * If you want to change mode, you need to change RS_DEFAULT of value.
- * (ex 1byte burst mode -> (RS_DUAL & ~TS_32)
- */
-#define RS_DEFAULT (RS_DUAL)
+/* Default MEMCPY transfer size = 2^2 = 4 bytes */
+#define LOG2_DEFAULT_XFER_SIZE 2
/* A bitmask with bits enough for enum sh_dmae_slave_chan_id */
static unsigned long sh_dmae_slave_used[BITS_TO_LONGS(SHDMA_SLAVE_NUMBER)];
static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all);
-#define SH_DMAC_CHAN_BASE(id) (dma_base_addr[id])
static void sh_dmae_writel(struct sh_dmae_chan *sh_dc, u32 data, u32 reg)
{
- ctrl_outl(data, SH_DMAC_CHAN_BASE(sh_dc->id) + reg);
+ __raw_writel(data, sh_dc->base + reg / sizeof(u32));
}
static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
{
- return ctrl_inl(SH_DMAC_CHAN_BASE(sh_dc->id) + reg);
+ return __raw_readl(sh_dc->base + reg / sizeof(u32));
+}
+
+static u16 dmaor_read(struct sh_dmae_device *shdev)
+{
+ return __raw_readw(shdev->chan_reg + DMAOR / sizeof(u32));
+}
+
+static void dmaor_write(struct sh_dmae_device *shdev, u16 data)
+{
+ __raw_writew(data, shdev->chan_reg + DMAOR / sizeof(u32));
}
/*
@@ -69,24 +73,23 @@ static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
*
* SH7780 has two DMAOR register
*/
-static void sh_dmae_ctl_stop(int id)
+static void sh_dmae_ctl_stop(struct sh_dmae_device *shdev)
{
- unsigned short dmaor = dmaor_read_reg(id);
+ unsigned short dmaor = dmaor_read(shdev);
- dmaor &= ~(DMAOR_NMIF | DMAOR_AE);
- dmaor_write_reg(id, dmaor);
+ dmaor_write(shdev, dmaor & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME));
}
-static int sh_dmae_rst(int id)
+static int sh_dmae_rst(struct sh_dmae_device *shdev)
{
unsigned short dmaor;
- sh_dmae_ctl_stop(id);
- dmaor = dmaor_read_reg(id) | DMAOR_INIT;
+ sh_dmae_ctl_stop(shdev);
+ dmaor = dmaor_read(shdev) | shdev->pdata->dmaor_init;
- dmaor_write_reg(id, dmaor);
- if (dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF)) {
- pr_warning(KERN_ERR "dma-sh: Can't initialize DMAOR.\n");
+ dmaor_write(shdev, dmaor);
+ if (dmaor_read(shdev) & (DMAOR_AE | DMAOR_NMIF)) {
+ pr_warning("dma-sh: Can't initialize DMAOR.\n");
return -EINVAL;
}
return 0;
@@ -102,13 +105,36 @@ static bool dmae_is_busy(struct sh_dmae_chan *sh_chan)
return false; /* waiting */
}
-static unsigned int ts_shift[] = TS_SHIFT;
-static inline unsigned int calc_xmit_shift(u32 chcr)
+static unsigned int calc_xmit_shift(struct sh_dmae_chan *sh_chan, u32 chcr)
{
- int cnt = ((chcr & CHCR_TS_LOW_MASK) >> CHCR_TS_LOW_SHIFT) |
- ((chcr & CHCR_TS_HIGH_MASK) >> CHCR_TS_HIGH_SHIFT);
+ struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
+ struct sh_dmae_device, common);
+ struct sh_dmae_pdata *pdata = shdev->pdata;
+ int cnt = ((chcr & pdata->ts_low_mask) >> pdata->ts_low_shift) |
+ ((chcr & pdata->ts_high_mask) >> pdata->ts_high_shift);
+
+ if (cnt >= pdata->ts_shift_num)
+ cnt = 0;
- return ts_shift[cnt];
+ return pdata->ts_shift[cnt];
+}
+
+static u32 log2size_to_chcr(struct sh_dmae_chan *sh_chan, int l2size)
+{
+ struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
+ struct sh_dmae_device, common);
+ struct sh_dmae_pdata *pdata = shdev->pdata;
+ int i;
+
+ for (i = 0; i < pdata->ts_shift_num; i++)
+ if (pdata->ts_shift[i] == l2size)
+ break;
+
+ if (i == pdata->ts_shift_num)
+ i = 0;
+
+ return ((i << pdata->ts_low_shift) & pdata->ts_low_mask) |
+ ((i << pdata->ts_high_shift) & pdata->ts_high_mask);
}
static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs *hw)
@@ -136,8 +162,13 @@ static void dmae_halt(struct sh_dmae_chan *sh_chan)
static void dmae_init(struct sh_dmae_chan *sh_chan)
{
- u32 chcr = RS_DEFAULT; /* default is DUAL mode */
- sh_chan->xmit_shift = calc_xmit_shift(chcr);
+ /*
+ * Default configuration for dual address memory-memory transfer.
+ * 0x400 represents auto-request.
+ */
+ u32 chcr = DM_INC | SM_INC | 0x400 | log2size_to_chcr(sh_chan,
+ LOG2_DEFAULT_XFER_SIZE);
+ sh_chan->xmit_shift = calc_xmit_shift(sh_chan, chcr);
sh_dmae_writel(sh_chan, chcr, CHCR);
}
@@ -147,37 +178,26 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
if (dmae_is_busy(sh_chan))
return -EBUSY;
- sh_chan->xmit_shift = calc_xmit_shift(val);
+ sh_chan->xmit_shift = calc_xmit_shift(sh_chan, val);
sh_dmae_writel(sh_chan, val, CHCR);
return 0;
}
-#define DMARS_SHIFT 8
-#define DMARS_CHAN_MSK 0x01
static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
{
- u32 addr;
- int shift = 0;
+ struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
+ struct sh_dmae_device, common);
+ struct sh_dmae_pdata *pdata = shdev->pdata;
+ struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->id];
+ u16 __iomem *addr = shdev->dmars + chan_pdata->dmars / sizeof(u16);
+ int shift = chan_pdata->dmars_bit;
if (dmae_is_busy(sh_chan))
return -EBUSY;
- if (sh_chan->id & DMARS_CHAN_MSK)
- shift = DMARS_SHIFT;
-
- if (sh_chan->id < 6)
- /* DMA0RS0 - DMA0RS2 */
- addr = SH_DMARS_BASE0 + (sh_chan->id / 2) * 4;
-#ifdef SH_DMARS_BASE1
- else if (sh_chan->id < 12)
- /* DMA1RS0 - DMA1RS2 */
- addr = SH_DMARS_BASE1 + ((sh_chan->id - 6) / 2) * 4;
-#endif
- else
- return -EINVAL;
-
- ctrl_outw((val << shift) | (ctrl_inw(addr) & (0xFF00 >> shift)), addr);
+ __raw_writew((__raw_readw(addr) & (0xff00 >> shift)) | (val << shift),
+ addr);
return 0;
}
@@ -251,15 +271,15 @@ static struct sh_dmae_slave_config *sh_dmae_find_slave(
struct dma_device *dma_dev = sh_chan->common.device;
struct sh_dmae_device *shdev = container_of(dma_dev,
struct sh_dmae_device, common);
- struct sh_dmae_pdata *pdata = &shdev->pdata;
+ struct sh_dmae_pdata *pdata = shdev->pdata;
int i;
if ((unsigned)slave_id >= SHDMA_SLAVE_NUMBER)
return NULL;
- for (i = 0; i < pdata->config_num; i++)
- if (pdata->config[i].slave_id == slave_id)
- return pdata->config + i;
+ for (i = 0; i < pdata->slave_num; i++)
+ if (pdata->slave[i].slave_id == slave_id)
+ return pdata->slave + i;
return NULL;
}
@@ -270,6 +290,8 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
struct sh_desc *desc;
struct sh_dmae_slave *param = chan->private;
+ pm_runtime_get_sync(sh_chan->dev);
+
/*
* This relies on the guarantee from dmaengine that alloc_chan_resources
* never runs concurrently with itself or free_chan_resources.
@@ -288,9 +310,8 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
dmae_set_dmars(sh_chan, cfg->mid_rid);
dmae_set_chcr(sh_chan, cfg->chcr);
- } else {
- if ((sh_dmae_readl(sh_chan, CHCR) & 0x700) != 0x400)
- dmae_set_chcr(sh_chan, RS_DEFAULT);
+ } else if ((sh_dmae_readl(sh_chan, CHCR) & 0xf00) != 0x400) {
+ dmae_init(sh_chan);
}
spin_lock_bh(&sh_chan->desc_lock);
@@ -312,6 +333,9 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
}
spin_unlock_bh(&sh_chan->desc_lock);
+ if (!sh_chan->descs_allocated)
+ pm_runtime_put(sh_chan->dev);
+
return sh_chan->descs_allocated;
}
@@ -323,6 +347,7 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
struct sh_desc *desc, *_desc;
LIST_HEAD(list);
+ int descs = sh_chan->descs_allocated;
dmae_halt(sh_chan);
@@ -343,6 +368,9 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
spin_unlock_bh(&sh_chan->desc_lock);
+ if (descs > 0)
+ pm_runtime_put(sh_chan->dev);
+
list_for_each_entry_safe(desc, _desc, &list, node)
kfree(desc);
}
@@ -559,6 +587,19 @@ static void sh_dmae_terminate_all(struct dma_chan *chan)
if (!chan)
return;
+ dmae_halt(sh_chan);
+
+ spin_lock_bh(&sh_chan->desc_lock);
+ if (!list_empty(&sh_chan->ld_queue)) {
+ /* Record partial transfer */
+ struct sh_desc *desc = list_entry(sh_chan->ld_queue.next,
+ struct sh_desc, node);
+ desc->partial = (desc->hw.tcr - sh_dmae_readl(sh_chan, TCR)) <<
+ sh_chan->xmit_shift;
+
+ }
+ spin_unlock_bh(&sh_chan->desc_lock);
+
sh_dmae_chan_ld_cleanup(sh_chan, true);
}
@@ -661,7 +702,7 @@ static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all)
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
{
- struct sh_desc *sd;
+ struct sh_desc *desc;
spin_lock_bh(&sh_chan->desc_lock);
/* DMA work check */
@@ -671,10 +712,13 @@ static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
}
/* Find the first not transferred desciptor */
- list_for_each_entry(sd, &sh_chan->ld_queue, node)
- if (sd->mark == DESC_SUBMITTED) {
+ list_for_each_entry(desc, &sh_chan->ld_queue, node)
+ if (desc->mark == DESC_SUBMITTED) {
+ dev_dbg(sh_chan->dev, "Queue #%d to %d: %u@%x -> %x\n",
+ desc->async_tx.cookie, sh_chan->id,
+ desc->hw.tcr, desc->hw.sar, desc->hw.dar);
/* Get the ld start address from ld_queue */
- dmae_set_reg(sh_chan, &sd->hw);
+ dmae_set_reg(sh_chan, &desc->hw);
dmae_start(sh_chan);
break;
}
@@ -696,6 +740,7 @@ static enum dma_status sh_dmae_is_complete(struct dma_chan *chan,
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
+ enum dma_status status;
sh_dmae_chan_ld_cleanup(sh_chan, false);
@@ -709,7 +754,27 @@ static enum dma_status sh_dmae_is_complete(struct dma_chan *chan,
if (used)
*used = last_used;
- return dma_async_is_complete(cookie, last_complete, last_used);
+ spin_lock_bh(&sh_chan->desc_lock);
+
+ status = dma_async_is_complete(cookie, last_complete, last_used);
+
+ /*
+ * If we don't find cookie on the queue, it has been aborted and we have
+ * to report error
+ */
+ if (status != DMA_SUCCESS) {
+ struct sh_desc *desc;
+ status = DMA_ERROR;
+ list_for_each_entry(desc, &sh_chan->ld_queue, node)
+ if (desc->cookie == cookie) {
+ status = DMA_IN_PROGRESS;
+ break;
+ }
+ }
+
+ spin_unlock_bh(&sh_chan->desc_lock);
+
+ return status;
}
static irqreturn_t sh_dmae_interrupt(int irq, void *data)
@@ -732,40 +797,32 @@ static irqreturn_t sh_dmae_interrupt(int irq, void *data)
#if defined(CONFIG_CPU_SH4)
static irqreturn_t sh_dmae_err(int irq, void *data)
{
- int err = 0;
struct sh_dmae_device *shdev = (struct sh_dmae_device *)data;
+ int i;
- /* IRQ Multi */
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
- int __maybe_unused 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);
- return IRQ_HANDLED;
+ /* halt the dma controller */
+ sh_dmae_ctl_stop(shdev);
+
+ /* We cannot detect, which channel caused the error, have to reset all */
+ for (i = 0; i < SH_DMAC_MAX_CHANNELS; i++) {
+ struct sh_dmae_chan *sh_chan = shdev->chan[i];
+ if (sh_chan) {
+ struct sh_desc *desc;
+ /* Stop the channel */
+ dmae_halt(sh_chan);
+ /* Complete all */
+ list_for_each_entry(desc, &sh_chan->ld_queue, node) {
+ struct dma_async_tx_descriptor *tx = &desc->async_tx;
+ desc->mark = DESC_IDLE;
+ if (tx->callback)
+ tx->callback(tx->callback_param);
}
- default:
- return IRQ_NONE;
+ list_splice_init(&sh_chan->ld_queue, &sh_chan->ld_free);
}
- } else {
- /* reset dma controller */
- err = sh_dmae_rst(0);
- if (err)
- return err;
-#ifdef SH_DMAC_BASE1
- if (shdev->pdata.mode & SHDMA_DMAOR1) {
- err = sh_dmae_rst(1);
- if (err)
- return err;
- }
-#endif
- disable_irq(irq);
- return IRQ_HANDLED;
}
+ sh_dmae_rst(shdev);
+
+ return IRQ_HANDLED;
}
#endif
@@ -796,19 +853,12 @@ static void dmae_do_tasklet(unsigned long data)
sh_dmae_chan_ld_cleanup(sh_chan, false);
}
-static unsigned int get_dmae_irq(unsigned int id)
-{
- unsigned int irq = 0;
- if (id < ARRAY_SIZE(dmte_irq_map))
- irq = dmte_irq_map[id];
- return irq;
-}
-
-static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
+static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
+ int irq, unsigned long flags)
{
int err;
- unsigned int irq = get_dmae_irq(id);
- unsigned long irqflags = IRQF_DISABLED;
+ struct sh_dmae_channel *chan_pdata = &shdev->pdata->channel[id];
+ struct platform_device *pdev = to_platform_device(shdev->common.dev);
struct sh_dmae_chan *new_sh_chan;
/* alloc channel */
@@ -819,8 +869,13 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
return -ENOMEM;
}
+ /* copy struct dma_device */
+ new_sh_chan->common.device = &shdev->common;
+
new_sh_chan->dev = shdev->common.dev;
new_sh_chan->id = id;
+ new_sh_chan->irq = irq;
+ new_sh_chan->base = shdev->chan_reg + chan_pdata->offset / sizeof(u32);
/* Init DMA tasklet */
tasklet_init(&new_sh_chan->tasklet, dmae_do_tasklet,
@@ -835,29 +890,20 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
INIT_LIST_HEAD(&new_sh_chan->ld_queue);
INIT_LIST_HEAD(&new_sh_chan->ld_free);
- /* copy struct dma_device */
- new_sh_chan->common.device = &shdev->common;
-
/* Add the channel to DMA device channel list */
list_add_tail(&new_sh_chan->common.device_node,
&shdev->common.channels);
shdev->common.chancnt++;
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
- irqflags = IRQF_SHARED;
-#if defined(DMTE6_IRQ)
- if (irq >= DMTE6_IRQ)
- irq = DMTE6_IRQ;
- else
-#endif
- irq = DMTE0_IRQ;
- }
-
- snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
- "sh-dmae%d", new_sh_chan->id);
+ if (pdev->id >= 0)
+ snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
+ "sh-dmae%d.%d", pdev->id, new_sh_chan->id);
+ else
+ snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
+ "sh-dma%d", new_sh_chan->id);
/* set up channel irq */
- err = request_irq(irq, &sh_dmae_interrupt, irqflags,
+ err = request_irq(irq, &sh_dmae_interrupt, flags,
new_sh_chan->dev_id, new_sh_chan);
if (err) {
dev_err(shdev->common.dev, "DMA channel %d request_irq error "
@@ -881,12 +927,12 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev)
for (i = shdev->common.chancnt - 1 ; i >= 0 ; i--) {
if (shdev->chan[i]) {
- struct sh_dmae_chan *shchan = shdev->chan[i];
- if (!(shdev->pdata.mode & SHDMA_MIX_IRQ))
- free_irq(dmte_irq_map[i], shchan);
+ struct sh_dmae_chan *sh_chan = shdev->chan[i];
- list_del(&shchan->common.device_node);
- kfree(shchan);
+ free_irq(sh_chan->irq, sh_chan);
+
+ list_del(&sh_chan->common.device_node);
+ kfree(sh_chan);
shdev->chan[i] = NULL;
}
}
@@ -895,47 +941,84 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev)
static int __init sh_dmae_probe(struct platform_device *pdev)
{
- int err = 0, cnt, ecnt;
- unsigned long irqflags = IRQF_DISABLED;
-#if defined(CONFIG_CPU_SH4)
- int eirq[] = { DMAE0_IRQ,
-#if defined(DMAE1_IRQ)
- DMAE1_IRQ
-#endif
- };
-#endif
+ struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
+ unsigned long irqflags = IRQF_DISABLED,
+ chan_flag[SH_DMAC_MAX_CHANNELS] = {};
+ int errirq, chan_irq[SH_DMAC_MAX_CHANNELS];
+ int err, i, irq_cnt = 0, irqres = 0;
struct sh_dmae_device *shdev;
+ struct resource *chan, *dmars, *errirq_res, *chanirq_res;
/* get platform data */
- if (!pdev->dev.platform_data)
+ if (!pdata || !pdata->channel_num)
return -ENODEV;
+ chan = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ /* DMARS area is optional, if absent, this controller cannot do slave DMA */
+ dmars = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ /*
+ * IRQ resources:
+ * 1. there always must be at least one IRQ IO-resource. On SH4 it is
+ * the error IRQ, in which case it is the only IRQ in this resource:
+ * start == end. If it is the only IRQ resource, all channels also
+ * use the same IRQ.
+ * 2. DMA channel IRQ resources can be specified one per resource or in
+ * ranges (start != end)
+ * 3. iff all events (channels and, optionally, error) on this
+ * controller use the same IRQ, only one IRQ resource can be
+ * specified, otherwise there must be one IRQ per channel, even if
+ * some of them are equal
+ * 4. if all IRQs on this controller are equal or if some specific IRQs
+ * specify IORESOURCE_IRQ_SHAREABLE in their resources, they will be
+ * requested with the IRQF_SHARED flag
+ */
+ errirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!chan || !errirq_res)
+ return -ENODEV;
+
+ if (!request_mem_region(chan->start, resource_size(chan), pdev->name)) {
+ dev_err(&pdev->dev, "DMAC register region already claimed\n");
+ return -EBUSY;
+ }
+
+ if (dmars && !request_mem_region(dmars->start, resource_size(dmars), pdev->name)) {
+ dev_err(&pdev->dev, "DMAC DMARS region already claimed\n");
+ err = -EBUSY;
+ goto ermrdmars;
+ }
+
+ err = -ENOMEM;
shdev = kzalloc(sizeof(struct sh_dmae_device), GFP_KERNEL);
if (!shdev) {
- dev_err(&pdev->dev, "No enough memory\n");
- return -ENOMEM;
+ dev_err(&pdev->dev, "Not enough memory\n");
+ goto ealloc;
+ }
+
+ shdev->chan_reg = ioremap(chan->start, resource_size(chan));
+ if (!shdev->chan_reg)
+ goto emapchan;
+ if (dmars) {
+ shdev->dmars = ioremap(dmars->start, resource_size(dmars));
+ if (!shdev->dmars)
+ goto emapdmars;
}
/* platform data */
- memcpy(&shdev->pdata, pdev->dev.platform_data,
- sizeof(struct sh_dmae_pdata));
+ shdev->pdata = pdata;
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
/* reset dma controller */
- err = sh_dmae_rst(0);
+ err = sh_dmae_rst(shdev);
if (err)
goto rst_err;
- /* SH7780/85/23 has DMAOR1 */
- if (shdev->pdata.mode & SHDMA_DMAOR1) {
- err = sh_dmae_rst(1);
- if (err)
- goto rst_err;
- }
-
INIT_LIST_HEAD(&shdev->common.channels);
dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask);
- dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
+ if (dmars)
+ dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
shdev->common.device_alloc_chan_resources
= sh_dmae_alloc_chan_resources;
@@ -950,37 +1033,72 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
shdev->common.dev = &pdev->dev;
/* Default transfer size of 32 bytes requires 32-byte alignment */
- shdev->common.copy_align = 5;
+ shdev->common.copy_align = LOG2_DEFAULT_XFER_SIZE;
#if defined(CONFIG_CPU_SH4)
- /* Non Mix IRQ mode SH7722/SH7730 etc... */
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
+ chanirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+
+ if (!chanirq_res)
+ chanirq_res = errirq_res;
+ else
+ irqres++;
+
+ if (chanirq_res == errirq_res ||
+ (errirq_res->flags & IORESOURCE_BITS) == IORESOURCE_IRQ_SHAREABLE)
irqflags = IRQF_SHARED;
- eirq[0] = DMTE0_IRQ;
-#if defined(DMTE6_IRQ) && defined(DMAE1_IRQ)
- eirq[1] = DMTE6_IRQ;
-#endif
+
+ errirq = errirq_res->start;
+
+ err = request_irq(errirq, sh_dmae_err, irqflags,
+ "DMAC Address Error", shdev);
+ if (err) {
+ dev_err(&pdev->dev,
+ "DMA failed requesting irq #%d, error %d\n",
+ errirq, err);
+ goto eirq_err;
}
- for (ecnt = 0 ; ecnt < ARRAY_SIZE(eirq); ecnt++) {
- err = request_irq(eirq[ecnt], sh_dmae_err, irqflags,
- "DMAC Address Error", shdev);
- if (err) {
- dev_err(&pdev->dev, "DMA device request_irq"
- "error (irq %d) with return %d\n",
- eirq[ecnt], err);
- goto eirq_err;
+#else
+ chanirq_res = errirq_res;
+#endif /* CONFIG_CPU_SH4 */
+
+ if (chanirq_res->start == chanirq_res->end &&
+ !platform_get_resource(pdev, IORESOURCE_IRQ, 1)) {
+ /* Special case - all multiplexed */
+ for (; irq_cnt < pdata->channel_num; irq_cnt++) {
+ chan_irq[irq_cnt] = chanirq_res->start;
+ chan_flag[irq_cnt] = IRQF_SHARED;
}
+ } else {
+ do {
+ for (i = chanirq_res->start; i <= chanirq_res->end; i++) {
+ if ((errirq_res->flags & IORESOURCE_BITS) ==
+ IORESOURCE_IRQ_SHAREABLE)
+ chan_flag[irq_cnt] = IRQF_SHARED;
+ else
+ chan_flag[irq_cnt] = IRQF_DISABLED;
+ dev_dbg(&pdev->dev,
+ "Found IRQ %d for channel %d\n",
+ i, irq_cnt);
+ chan_irq[irq_cnt++] = i;
+ }
+ chanirq_res = platform_get_resource(pdev,
+ IORESOURCE_IRQ, ++irqres);
+ } while (irq_cnt < pdata->channel_num && chanirq_res);
}
-#endif /* CONFIG_CPU_SH4 */
+
+ if (irq_cnt < pdata->channel_num)
+ goto eirqres;
/* Create DMA Channel */
- for (cnt = 0 ; cnt < MAX_DMA_CHANNELS ; cnt++) {
- err = sh_dmae_chan_probe(shdev, cnt);
+ for (i = 0; i < pdata->channel_num; i++) {
+ err = sh_dmae_chan_probe(shdev, i, chan_irq[i], chan_flag[i]);
if (err)
goto chan_probe_err;
}
+ pm_runtime_put(&pdev->dev);
+
platform_set_drvdata(pdev, shdev);
dma_async_device_register(&shdev->common);
@@ -988,13 +1106,24 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
chan_probe_err:
sh_dmae_chan_remove(shdev);
-
+eirqres:
+#if defined(CONFIG_CPU_SH4)
+ free_irq(errirq, shdev);
eirq_err:
- for (ecnt-- ; ecnt >= 0; ecnt--)
- free_irq(eirq[ecnt], shdev);
-
+#endif
rst_err:
+ pm_runtime_put(&pdev->dev);
+ if (dmars)
+ iounmap(shdev->dmars);
+emapdmars:
+ iounmap(shdev->chan_reg);
+emapchan:
kfree(shdev);
+ealloc:
+ if (dmars)
+ release_mem_region(dmars->start, resource_size(dmars));
+ermrdmars:
+ release_mem_region(chan->start, resource_size(chan));
return err;
}
@@ -1002,36 +1131,39 @@ rst_err:
static int __exit sh_dmae_remove(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
+ struct resource *res;
+ int errirq = platform_get_irq(pdev, 0);
dma_async_device_unregister(&shdev->common);
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
- free_irq(DMTE0_IRQ, shdev);
-#if defined(DMTE6_IRQ)
- free_irq(DMTE6_IRQ, shdev);
-#endif
- }
+ if (errirq > 0)
+ free_irq(errirq, shdev);
/* channel data remove */
sh_dmae_chan_remove(shdev);
- if (!(shdev->pdata.mode & SHDMA_MIX_IRQ)) {
- free_irq(DMAE0_IRQ, shdev);
-#if defined(DMAE1_IRQ)
- free_irq(DMAE1_IRQ, shdev);
-#endif
- }
+ pm_runtime_disable(&pdev->dev);
+
+ if (shdev->dmars)
+ iounmap(shdev->dmars);
+ iounmap(shdev->chan_reg);
+
kfree(shdev);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+
return 0;
}
static void sh_dmae_shutdown(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
- sh_dmae_ctl_stop(0);
- if (shdev->pdata.mode & SHDMA_DMAOR1)
- sh_dmae_ctl_stop(1);
+ sh_dmae_ctl_stop(shdev);
}
static struct platform_driver sh_dmae_driver = {
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 7e227f3c87c4..153609a1e96c 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -17,23 +17,9 @@
#include <linux/interrupt.h>
#include <linux/list.h>
-#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */
-
-struct sh_dmae_regs {
- u32 sar; /* SAR / source address */
- u32 dar; /* DAR / destination address */
- u32 tcr; /* TCR / transfer count */
-};
+#include <asm/dmaengine.h>
-struct sh_desc {
- struct sh_dmae_regs hw;
- struct list_head node;
- struct dma_async_tx_descriptor async_tx;
- enum dma_data_direction direction;
- dma_cookie_t cookie;
- int chunks;
- int mark;
-};
+#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */
struct device;
@@ -47,14 +33,18 @@ struct sh_dmae_chan {
struct tasklet_struct tasklet; /* Tasklet */
int descs_allocated; /* desc count */
int xmit_shift; /* log_2(bytes_per_xfer) */
+ int irq;
int id; /* Raw id of this channel */
+ u32 __iomem *base;
char dev_id[16]; /* unique name per DMAC of channel */
};
struct sh_dmae_device {
struct dma_device common;
- struct sh_dmae_chan *chan[MAX_DMA_CHANNELS];
- struct sh_dmae_pdata pdata;
+ struct sh_dmae_chan *chan[SH_DMAC_MAX_CHANNELS];
+ struct sh_dmae_pdata *pdata;
+ u32 __iomem *chan_reg;
+ u16 __iomem *dmars;
};
#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)