@@ -64,8 +64,10 @@ static int dmte_irq_map[] __maybe_unused = {
#define ACK_L 0x00010000
#define DM_INC 0x00004000
#define DM_DEC 0x00008000
+#define DM_FIX 0x0000c000
#define SM_INC 0x00001000
#define SM_DEC 0x00002000
+#define SM_FIX 0x00003000
#define RS_IN 0x00000200
#define RS_OUT 0x00000300
#define TS_BLK 0x00000040
@@ -123,10 +125,47 @@ static u32 dma_base_addr[] __maybe_unused = {
*/
#define SHDMA_MIX_IRQ (1 << 1)
#define SHDMA_DMAOR1 (1 << 2)
-#define SHDMA_DMAE1 (1 << 3)
+#define SHDMA_DMAE1 (1 << 3)
+
+enum sh_dmae_slave_chan_id {
+ SHDMA_SLAVE_SCIF0_TX,
+ SHDMA_SLAVE_SCIF0_RX,
+ SHDMA_SLAVE_SCIF1_TX,
+ SHDMA_SLAVE_SCIF1_RX,
+ SHDMA_SLAVE_SCIF2_TX,
+ SHDMA_SLAVE_SCIF2_RX,
+ SHDMA_SLAVE_SCIF3_TX,
+ SHDMA_SLAVE_SCIF3_RX,
+ SHDMA_SLAVE_SCIF4_TX,
+ SHDMA_SLAVE_SCIF4_RX,
+ SHDMA_SLAVE_SCIF5_TX,
+ SHDMA_SLAVE_SCIF5_RX,
+ SHDMA_SLAVE_SIUA_TX,
+ SHDMA_SLAVE_SIUA_RX,
+ SHDMA_SLAVE_SIUB_TX,
+ SHDMA_SLAVE_SIUB_RX,
+ SHDMA_SLAVE_NUMBER, /* Must stay last */
+};
+
+struct sh_dmae_slave_config {
+ enum sh_dmae_slave_chan_id slave_id;
+ dma_addr_t addr;
+ u32 chcr;
+ char mid_rid;
+};
struct sh_dmae_pdata {
unsigned int mode;
+ struct sh_dmae_slave_config *config;
+ int config_num;
+};
+
+struct device;
+
+struct sh_dmae_slave {
+ enum sh_dmae_slave_chan_id slave_id; /* Set by the platform */
+ struct device *dma_dev; /* Set by the platform */
+ struct sh_dmae_slave_config *config; /* Set by the driver */
};
#endif /* __DMA_SH_H */
@@ -7,7 +7,7 @@
#define DMTE4_IRQ 76
#define DMAE0_IRQ 78 /* DMA Error IRQ*/
#define SH_DMAC_BASE0 0xFE008020
-#define SH_DMARS_BASE 0xFE009000
+#define SH_DMARS_BASE0 0xFE009000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0
@@ -17,7 +17,7 @@
#define DMTE4_IRQ 76
#define DMAE0_IRQ 78 /* DMA Error IRQ*/
#define SH_DMAC_BASE0 0xFE008020
-#define SH_DMARS_BASE 0xFE009000
+#define SH_DMARS_BASE0 0xFE009000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0x00300000
@@ -28,7 +28,7 @@
#define DMTE4_IRQ 44
#define DMAE0_IRQ 38
#define SH_DMAC_BASE0 0xFF608020
-#define SH_DMARS_BASE 0xFF609000
+#define SH_DMARS_BASE0 0xFF609000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0
@@ -45,7 +45,7 @@
#define DMAE1_IRQ 74 /* DMA Error IRQ*/
#define SH_DMAC_BASE0 0xFE008020
#define SH_DMAC_BASE1 0xFDC08020
-#define SH_DMARS_BASE 0xFDC09000
+#define SH_DMARS_BASE0 0xFDC09000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0
@@ -62,7 +62,8 @@
#define DMAE1_IRQ 74 /* DMA Error IRQ*/
#define SH_DMAC_BASE0 0xFE008020
#define SH_DMAC_BASE1 0xFDC08020
-#define SH_DMARS_BASE 0xFDC09000
+#define SH_DMARS_BASE0 0xFE009000
+#define SH_DMARS_BASE1 0xFDC09000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0x00600000
@@ -78,7 +79,7 @@
#define DMAE0_IRQ 38 /* DMA Error IRQ */
#define SH_DMAC_BASE0 0xFC808020
#define SH_DMAC_BASE1 0xFC818020
-#define SH_DMARS_BASE 0xFC809000
+#define SH_DMARS_BASE0 0xFC809000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0
@@ -95,7 +96,7 @@
#define DMAE1_IRQ 58 /* DMA Error IRQ1 */
#define SH_DMAC_BASE0 0xFC808020
#define SH_DMAC_BASE1 0xFCC08020
-#define SH_DMARS_BASE 0xFC809000
+#define SH_DMARS_BASE0 0xFC809000
#define CHCR_TS01_MASK 0x00000018
#define CHCR_TS01_SHIFT 3
#define CHCR_TS23_MASK 0
@@ -48,6 +48,9 @@ enum sh_dmae_desc_status {
*/
#define RS_DEFAULT (RS_DUAL)
+/* 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])
@@ -127,7 +130,7 @@ static void dmae_start(struct sh_dmae_chan *sh_chan)
u32 chcr = sh_dmae_readl(sh_chan, CHCR);
chcr |= CHCR_DE | CHCR_IE;
- sh_dmae_writel(sh_chan, chcr, CHCR);
+ sh_dmae_writel(sh_chan, chcr & ~CHCR_TE, CHCR);
}
static void dmae_halt(struct sh_dmae_chan *sh_chan)
@@ -148,10 +151,8 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
return 0;
}
-#define DMARS1_ADDR 0x04
-#define DMARS2_ADDR 0x08
-#define DMARS_SHIFT 8
-#define DMARS_CHAN_MSK 0x01
+#define DMARS_SHIFT 8
+#define DMARS_CHAN_MSK 0x01
static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
{
u32 addr;
@@ -163,29 +164,18 @@ static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
if (sh_chan->id & DMARS_CHAN_MSK)
shift = DMARS_SHIFT;
- switch (sh_chan->id) {
- /* DMARS0 */
- case 0:
- case 1:
- addr = SH_DMARS_BASE;
- break;
- /* DMARS1 */
- case 2:
- case 3:
- addr = (SH_DMARS_BASE + DMARS1_ADDR);
- break;
- /* DMARS2 */
- case 4:
- case 5:
- addr = (SH_DMARS_BASE + DMARS2_ADDR);
- break;
- default:
+ 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) & (shift ? 0xFF00 : 0x00FF)),
- addr);
+ ctrl_outw((val << shift) | (ctrl_inw(addr) & (0xFF00 >> shift)), addr);
return 0;
}
@@ -253,10 +243,53 @@ static struct sh_desc *sh_dmae_get_desc(struct sh_dmae_chan *sh_chan)
return NULL;
}
+static struct sh_dmae_slave_config *sh_dmae_find_slave(
+ struct sh_dmae_chan *sh_chan, enum sh_dmae_slave_chan_id slave_id)
+{
+ 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;
+ 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;
+
+ return NULL;
+}
+
static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
{
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
struct sh_desc *desc;
+ struct sh_dmae_slave *param = chan->private;
+
+ /*
+ * Called under dma_list_mutex, take care to perform all slave channel
+ * ID manipulations under that lock.
+ */
+ if (param) {
+ struct sh_dmae_slave_config *cfg;
+
+ cfg = sh_dmae_find_slave(sh_chan, param->slave_id);
+ if (!cfg)
+ return -EINVAL;
+
+ if (test_and_set_bit(param->slave_id, sh_dmae_slave_used))
+ return -EBUSY;
+
+ param->config = cfg;
+
+ 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);
+ }
spin_lock_bh(&sh_chan->desc_lock);
while (sh_chan->descs_allocated < NR_DESCS_PER_CHANNEL) {
@@ -289,10 +322,18 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
struct sh_desc *desc, *_desc;
LIST_HEAD(list);
+ dmae_halt(sh_chan);
+
/* Prepared and not submitted descriptors can still be on the queue */
if (!list_empty(&sh_chan->ld_queue))
sh_dmae_chan_ld_cleanup(sh_chan, true);
+ if (chan->private) {
+ /* The caller is holding dma_list_mutex */
+ struct sh_dmae_slave *param = chan->private;
+ clear_bit(param->slave_id, sh_dmae_slave_used);
+ }
+
spin_lock_bh(&sh_chan->desc_lock);
list_splice_init(&sh_chan->ld_free, &list);
@@ -465,6 +506,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
if (!chan || !len)
return NULL;
+ chan->private = NULL;
+
sh_chan = to_sh_chan(chan);
sg_init_table(&sg, 1);
@@ -477,6 +520,44 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
flags);
}
+static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
+ struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len,
+ enum dma_data_direction direction, unsigned long flags)
+{
+ struct sh_dmae_slave *param;
+ struct sh_dmae_chan *sh_chan;
+
+ if (!chan)
+ return NULL;
+
+ sh_chan = to_sh_chan(chan);
+ param = chan->private;
+
+ /* Someone calling slave DMA on a public channel? */
+ if (!param || !sg_len) {
+ dev_warn(sh_chan->dev, "%s: bad parameter: %p, %d, %d\n",
+ __func__, param, sg_len, param ? param->slave_id : -1);
+ return NULL;
+ }
+
+ /*
+ * if (param != NULL), this is a successfully requested slave channel,
+ * therefore param->config != NULL too.
+ */
+ return sh_dmae_prep_sg(sh_chan, sgl, sg_len, ¶m->config->addr,
+ direction, flags);
+}
+
+static void sh_dmae_terminate_all(struct dma_chan *chan)
+{
+ struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
+
+ if (!chan)
+ return;
+
+ sh_dmae_chan_ld_cleanup(sh_chan, true);
+}
+
static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all)
{
struct sh_desc *desc, *_desc;
@@ -581,7 +662,7 @@ static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
return;
}
- /* Find the first un-transfer desciptor */
+ /* Find the first not transferred desciptor */
list_for_each_entry(sd, &sh_chan->ld_queue, node)
if (sd->mark == DESC_SUBMITTED) {
/* Get the ld start address from ld_queue */
@@ -762,7 +843,7 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
}
snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
- "sh-dmae%d", new_sh_chan->id);
+ "sh-dmae%d", new_sh_chan->id);
/* set up channel irq */
err = request_irq(irq, &sh_dmae_interrupt, irqflags,
@@ -773,11 +854,6 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
goto err_no_irq;
}
- /* CHCR register control function */
- new_sh_chan->set_chcr = dmae_set_chcr;
- /* DMARS register control function */
- new_sh_chan->set_dmars = dmae_set_dmars;
-
shdev->chan[id] = new_sh_chan;
return 0;
@@ -849,12 +925,19 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&shdev->common.channels);
dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask);
+ dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
+
shdev->common.device_alloc_chan_resources
= sh_dmae_alloc_chan_resources;
shdev->common.device_free_chan_resources = sh_dmae_free_chan_resources;
shdev->common.device_prep_dma_memcpy = sh_dmae_prep_memcpy;
shdev->common.device_is_tx_complete = sh_dmae_is_complete;
shdev->common.device_issue_pending = sh_dmae_memcpy_issue_pending;
+
+ /* Compulsory for DMA_SLAVE fields */
+ shdev->common.device_prep_slave_sg = sh_dmae_prep_slave_sg;
+ shdev->common.device_terminate_all = sh_dmae_terminate_all;
+
shdev->common.dev = &pdev->dev;
/* Default transfer size of 32 bytes requires 32-byte alignment */
shdev->common.copy_align = 5;