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-rw-r--r--Documentation/devicetree/bindings/usb/da8xx-usb.txt41
-rw-r--r--drivers/dma/Kconfig6
-rw-r--r--drivers/dma/cppi41.c168
3 files changed, 137 insertions, 78 deletions
diff --git a/Documentation/devicetree/bindings/usb/da8xx-usb.txt b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
index ccb844aba7d4..717c5f656237 100644
--- a/Documentation/devicetree/bindings/usb/da8xx-usb.txt
+++ b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
@@ -18,10 +18,26 @@ Required properties:
- phy-names: Should be "usb-phy"
+ - dmas: specifies the dma channels
+
+ - dma-names: specifies the names of the channels. Use "rxN" for receive
+ and "txN" for transmit endpoints. N specifies the endpoint number.
+
Optional properties:
~~~~~~~~~~~~~~~~~~~~
- vbus-supply: Phandle to a regulator providing the USB bus power.
+DMA
+~~~
+- compatible: ti,da830-cppi41
+- reg: offset and length of the following register spaces: CPPI DMA Controller,
+ CPPI DMA Scheduler, Queue Manager
+- reg-names: "controller", "scheduler", "queuemgr"
+- #dma-cells: should be set to 2. The first number represents the
+ channel number (0 … 3 for endpoints 1 … 4).
+ The second number is 0 for RX and 1 for TX transfers.
+- #dma-channels: should be set to 4 representing the 4 endpoints.
+
Example:
usb_phy: usb-phy {
compatible = "ti,da830-usb-phy";
@@ -30,7 +46,10 @@ Example:
};
usb0: usb@200000 {
compatible = "ti,da830-musb";
- reg = <0x00200000 0x10000>;
+ reg = <0x00200000 0x1000>;
+ ranges;
+ #address-cells = <1>;
+ #size-cells = <1>;
interrupts = <58>;
interrupt-names = "mc";
@@ -39,5 +58,25 @@ Example:
phys = <&usb_phy 0>;
phy-names = "usb-phy";
+ dmas = <&cppi41dma 0 0 &cppi41dma 1 0
+ &cppi41dma 2 0 &cppi41dma 3 0
+ &cppi41dma 0 1 &cppi41dma 1 1
+ &cppi41dma 2 1 &cppi41dma 3 1>;
+ dma-names =
+ "rx1", "rx2", "rx3", "rx4",
+ "tx1", "tx2", "tx3", "tx4";
+
status = "okay";
+
+ cppi41dma: dma-controller@201000 {
+ compatible = "ti,da830-cppi41";
+ reg = <0x201000 0x1000
+ 0x202000 0x1000
+ 0x204000 0x4000>;
+ reg-names = "controller", "scheduler", "queuemgr";
+ interrupts = <58>;
+ #dma-cells = <2>;
+ #dma-channels = <4>;
+ };
+
};
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 9be6736cb3d2..24e8597b2c3e 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -514,12 +514,12 @@ config TIMB_DMA
Enable support for the Timberdale FPGA DMA engine.
config TI_CPPI41
- tristate "AM33xx CPPI41 DMA support"
- depends on ARCH_OMAP
+ tristate "CPPI 4.1 DMA support"
+ depends on (ARCH_OMAP || ARCH_DAVINCI_DA8XX)
select DMA_ENGINE
help
The Communications Port Programming Interface (CPPI) 4.1 DMA engine
- is currently used by the USB driver on AM335x platforms.
+ is currently used by the USB driver on AM335x and DA8xx platforms.
config TI_DMA_CROSSBAR
bool
diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index d74cee077842..f7e965f63274 100644
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c
@@ -68,7 +68,6 @@
#define QMGR_MEMCTRL_IDX_SH 16
#define QMGR_MEMCTRL_DESC_SH 8
-#define QMGR_NUM_PEND 5
#define QMGR_PEND(x) (0x90 + (x) * 4)
#define QMGR_PENDING_SLOT_Q(x) (x / 32)
@@ -131,7 +130,6 @@ struct cppi41_dd {
u32 first_td_desc;
struct cppi41_channel *chan_busy[ALLOC_DECS_NUM];
- void __iomem *usbss_mem;
void __iomem *ctrl_mem;
void __iomem *sched_mem;
void __iomem *qmgr_mem;
@@ -139,6 +137,10 @@ struct cppi41_dd {
const struct chan_queues *queues_rx;
const struct chan_queues *queues_tx;
struct chan_queues td_queue;
+ u16 first_completion_queue;
+ u16 qmgr_num_pend;
+ u32 n_chans;
+ u8 platform;
struct list_head pending; /* Pending queued transfers */
spinlock_t lock; /* Lock for pending list */
@@ -149,8 +151,7 @@ struct cppi41_dd {
bool is_suspended;
};
-#define FIST_COMPLETION_QUEUE 93
-static struct chan_queues usb_queues_tx[] = {
+static struct chan_queues am335x_usb_queues_tx[] = {
/* USB0 ENDP 1 */
[ 0] = { .submit = 32, .complete = 93},
[ 1] = { .submit = 34, .complete = 94},
@@ -186,7 +187,7 @@ static struct chan_queues usb_queues_tx[] = {
[29] = { .submit = 90, .complete = 139},
};
-static const struct chan_queues usb_queues_rx[] = {
+static const struct chan_queues am335x_usb_queues_rx[] = {
/* USB0 ENDP 1 */
[ 0] = { .submit = 1, .complete = 109},
[ 1] = { .submit = 2, .complete = 110},
@@ -222,11 +223,26 @@ static const struct chan_queues usb_queues_rx[] = {
[29] = { .submit = 30, .complete = 155},
};
+static const struct chan_queues da8xx_usb_queues_tx[] = {
+ [0] = { .submit = 16, .complete = 24},
+ [1] = { .submit = 18, .complete = 24},
+ [2] = { .submit = 20, .complete = 24},
+ [3] = { .submit = 22, .complete = 24},
+};
+
+static const struct chan_queues da8xx_usb_queues_rx[] = {
+ [0] = { .submit = 1, .complete = 26},
+ [1] = { .submit = 3, .complete = 26},
+ [2] = { .submit = 5, .complete = 26},
+ [3] = { .submit = 7, .complete = 26},
+};
+
struct cppi_glue_infos {
- irqreturn_t (*isr)(int irq, void *data);
const struct chan_queues *queues_rx;
const struct chan_queues *queues_tx;
struct chan_queues td_queue;
+ u16 first_completion_queue;
+ u16 qmgr_num_pend;
};
static struct cppi41_channel *to_cpp41_chan(struct dma_chan *c)
@@ -285,19 +301,21 @@ static u32 cppi41_pop_desc(struct cppi41_dd *cdd, unsigned queue_num)
static irqreturn_t cppi41_irq(int irq, void *data)
{
struct cppi41_dd *cdd = data;
+ u16 first_completion_queue = cdd->first_completion_queue;
+ u16 qmgr_num_pend = cdd->qmgr_num_pend;
struct cppi41_channel *c;
int i;
- for (i = QMGR_PENDING_SLOT_Q(FIST_COMPLETION_QUEUE); i < QMGR_NUM_PEND;
+ for (i = QMGR_PENDING_SLOT_Q(first_completion_queue); i < qmgr_num_pend;
i++) {
u32 val;
u32 q_num;
val = cppi_readl(cdd->qmgr_mem + QMGR_PEND(i));
- if (i == QMGR_PENDING_SLOT_Q(FIST_COMPLETION_QUEUE) && val) {
+ if (i == QMGR_PENDING_SLOT_Q(first_completion_queue) && val) {
u32 mask;
/* set corresponding bit for completetion Q 93 */
- mask = 1 << QMGR_PENDING_BIT_Q(FIST_COMPLETION_QUEUE);
+ mask = 1 << QMGR_PENDING_BIT_Q(first_completion_queue);
/* not set all bits for queues less than Q 93 */
mask--;
/* now invert and keep only Q 93+ set */
@@ -402,11 +420,9 @@ static enum dma_status cppi41_dma_tx_status(struct dma_chan *chan,
struct cppi41_channel *c = to_cpp41_chan(chan);
enum dma_status ret;
- /* lock */
ret = dma_cookie_status(chan, cookie, txstate);
- if (txstate && ret == DMA_COMPLETE)
- txstate->residue = c->residue;
- /* unlock */
+
+ dma_set_residue(txstate, c->residue);
return ret;
}
@@ -630,7 +646,7 @@ static int cppi41_tear_down_chan(struct cppi41_channel *c)
if (!c->is_tx) {
reg |= GCR_STARV_RETRY;
reg |= GCR_DESC_TYPE_HOST;
- reg |= c->q_comp_num;
+ reg |= cdd->td_queue.complete;
}
reg |= GCR_TEARDOWN;
cppi_writel(reg, c->gcr_reg);
@@ -641,7 +657,7 @@ static int cppi41_tear_down_chan(struct cppi41_channel *c)
if (!c->td_seen || !c->td_desc_seen) {
desc_phys = cppi41_pop_desc(cdd, cdd->td_queue.complete);
- if (!desc_phys)
+ if (!desc_phys && c->is_tx)
desc_phys = cppi41_pop_desc(cdd, c->q_comp_num);
if (desc_phys == c->desc_phys) {
@@ -723,39 +739,24 @@ static int cppi41_stop_chan(struct dma_chan *chan)
return 0;
}
-static void cleanup_chans(struct cppi41_dd *cdd)
-{
- while (!list_empty(&cdd->ddev.channels)) {
- struct cppi41_channel *cchan;
-
- cchan = list_first_entry(&cdd->ddev.channels,
- struct cppi41_channel, chan.device_node);
- list_del(&cchan->chan.device_node);
- kfree(cchan);
- }
-}
-
static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd)
{
- struct cppi41_channel *cchan;
+ struct cppi41_channel *cchan, *chans;
int i;
- int ret;
- u32 n_chans;
+ u32 n_chans = cdd->n_chans;
- ret = of_property_read_u32(dev->of_node, "#dma-channels",
- &n_chans);
- if (ret)
- return ret;
/*
* The channels can only be used as TX or as RX. So we add twice
* that much dma channels because USB can only do RX or TX.
*/
n_chans *= 2;
+ chans = devm_kcalloc(dev, n_chans, sizeof(*chans), GFP_KERNEL);
+ if (!chans)
+ return -ENOMEM;
+
for (i = 0; i < n_chans; i++) {
- cchan = kzalloc(sizeof(*cchan), GFP_KERNEL);
- if (!cchan)
- goto err;
+ cchan = &chans[i];
cchan->cdd = cdd;
if (i & 1) {
@@ -775,9 +776,6 @@ static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd)
cdd->first_td_desc = n_chans;
return 0;
-err:
- cleanup_chans(cdd);
- return -ENOMEM;
}
static void purge_descs(struct device *dev, struct cppi41_dd *cdd)
@@ -859,7 +857,7 @@ static void init_sched(struct cppi41_dd *cdd)
word = 0;
cppi_writel(0, cdd->sched_mem + DMA_SCHED_CTRL);
- for (ch = 0; ch < 15 * 2; ch += 2) {
+ for (ch = 0; ch < cdd->n_chans; ch += 2) {
reg = SCHED_ENTRY0_CHAN(ch);
reg |= SCHED_ENTRY1_CHAN(ch) | SCHED_ENTRY1_IS_RX;
@@ -869,7 +867,7 @@ static void init_sched(struct cppi41_dd *cdd)
cppi_writel(reg, cdd->sched_mem + DMA_SCHED_WORD(word));
word++;
}
- reg = 15 * 2 * 2 - 1;
+ reg = cdd->n_chans * 2 - 1;
reg |= DMA_SCHED_CTRL_EN;
cppi_writel(reg, cdd->sched_mem + DMA_SCHED_CTRL);
}
@@ -885,7 +883,7 @@ static int init_cppi41(struct device *dev, struct cppi41_dd *cdd)
return -ENOMEM;
cppi_writel(cdd->scratch_phys, cdd->qmgr_mem + QMGR_LRAM0_BASE);
- cppi_writel(QMGR_SCRATCH_SIZE, cdd->qmgr_mem + QMGR_LRAM_SIZE);
+ cppi_writel(TOTAL_DESCS_NUM, cdd->qmgr_mem + QMGR_LRAM_SIZE);
cppi_writel(0, cdd->qmgr_mem + QMGR_LRAM1_BASE);
ret = init_descs(dev, cdd);
@@ -894,6 +892,7 @@ static int init_cppi41(struct device *dev, struct cppi41_dd *cdd)
cppi_writel(cdd->td_queue.submit, cdd->ctrl_mem + DMA_TDFDQ);
init_sched(cdd);
+
return 0;
err_td:
deinit_cppi41(dev, cdd);
@@ -933,8 +932,9 @@ static bool cpp41_dma_filter_fn(struct dma_chan *chan, void *param)
else
queues = cdd->queues_rx;
- BUILD_BUG_ON(ARRAY_SIZE(usb_queues_rx) != ARRAY_SIZE(usb_queues_tx));
- if (WARN_ON(cchan->port_num > ARRAY_SIZE(usb_queues_rx)))
+ BUILD_BUG_ON(ARRAY_SIZE(am335x_usb_queues_rx) !=
+ ARRAY_SIZE(am335x_usb_queues_tx));
+ if (WARN_ON(cchan->port_num > ARRAY_SIZE(am335x_usb_queues_rx)))
return false;
cchan->q_num = queues[cchan->port_num].submit;
@@ -962,15 +962,25 @@ static struct dma_chan *cppi41_dma_xlate(struct of_phandle_args *dma_spec,
&dma_spec->args[0]);
}
-static const struct cppi_glue_infos usb_infos = {
- .isr = cppi41_irq,
- .queues_rx = usb_queues_rx,
- .queues_tx = usb_queues_tx,
+static const struct cppi_glue_infos am335x_usb_infos = {
+ .queues_rx = am335x_usb_queues_rx,
+ .queues_tx = am335x_usb_queues_tx,
.td_queue = { .submit = 31, .complete = 0 },
+ .first_completion_queue = 93,
+ .qmgr_num_pend = 5,
+};
+
+static const struct cppi_glue_infos da8xx_usb_infos = {
+ .queues_rx = da8xx_usb_queues_rx,
+ .queues_tx = da8xx_usb_queues_tx,
+ .td_queue = { .submit = 31, .complete = 0 },
+ .first_completion_queue = 24,
+ .qmgr_num_pend = 2,
};
static const struct of_device_id cppi41_dma_ids[] = {
- { .compatible = "ti,am3359-cppi41", .data = &usb_infos},
+ { .compatible = "ti,am3359-cppi41", .data = &am335x_usb_infos},
+ { .compatible = "ti,da830-cppi41", .data = &da8xx_usb_infos},
{},
};
MODULE_DEVICE_TABLE(of, cppi41_dma_ids);
@@ -995,6 +1005,8 @@ static int cppi41_dma_probe(struct platform_device *pdev)
struct cppi41_dd *cdd;
struct device *dev = &pdev->dev;
const struct cppi_glue_infos *glue_info;
+ struct resource *mem;
+ int index;
int irq;
int ret;
@@ -1021,19 +1033,31 @@ static int cppi41_dma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&cdd->ddev.channels);
cpp41_dma_info.dma_cap = cdd->ddev.cap_mask;
- cdd->usbss_mem = of_iomap(dev->of_node, 0);
- cdd->ctrl_mem = of_iomap(dev->of_node, 1);
- cdd->sched_mem = of_iomap(dev->of_node, 2);
- cdd->qmgr_mem = of_iomap(dev->of_node, 3);
+ index = of_property_match_string(dev->of_node,
+ "reg-names", "controller");
+ if (index < 0)
+ return index;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ cdd->ctrl_mem = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(cdd->ctrl_mem))
+ return PTR_ERR(cdd->ctrl_mem);
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, index + 1);
+ cdd->sched_mem = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(cdd->sched_mem))
+ return PTR_ERR(cdd->sched_mem);
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, index + 2);
+ cdd->qmgr_mem = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(cdd->qmgr_mem))
+ return PTR_ERR(cdd->qmgr_mem);
+
spin_lock_init(&cdd->lock);
INIT_LIST_HEAD(&cdd->pending);
platform_set_drvdata(pdev, cdd);
- if (!cdd->usbss_mem || !cdd->ctrl_mem || !cdd->sched_mem ||
- !cdd->qmgr_mem)
- return -ENXIO;
-
pm_runtime_enable(dev);
pm_runtime_set_autosuspend_delay(dev, 100);
pm_runtime_use_autosuspend(dev);
@@ -1044,6 +1068,13 @@ static int cppi41_dma_probe(struct platform_device *pdev)
cdd->queues_rx = glue_info->queues_rx;
cdd->queues_tx = glue_info->queues_tx;
cdd->td_queue = glue_info->td_queue;
+ cdd->qmgr_num_pend = glue_info->qmgr_num_pend;
+ cdd->first_completion_queue = glue_info->first_completion_queue;
+
+ ret = of_property_read_u32(dev->of_node,
+ "#dma-channels", &cdd->n_chans);
+ if (ret)
+ goto err_get_n_chans;
ret = init_cppi41(dev, cdd);
if (ret)
@@ -1056,18 +1087,18 @@ static int cppi41_dma_probe(struct platform_device *pdev)
irq = irq_of_parse_and_map(dev->of_node, 0);
if (!irq) {
ret = -EINVAL;
- goto err_irq;
+ goto err_chans;
}
- ret = devm_request_irq(&pdev->dev, irq, glue_info->isr, IRQF_SHARED,
+ ret = devm_request_irq(&pdev->dev, irq, cppi41_irq, IRQF_SHARED,
dev_name(dev), cdd);
if (ret)
- goto err_irq;
+ goto err_chans;
cdd->irq = irq;
ret = dma_async_device_register(&cdd->ddev);
if (ret)
- goto err_dma_reg;
+ goto err_chans;
ret = of_dma_controller_register(dev->of_node,
cppi41_dma_xlate, &cpp41_dma_info);
@@ -1080,20 +1111,14 @@ static int cppi41_dma_probe(struct platform_device *pdev)
return 0;
err_of:
dma_async_device_unregister(&cdd->ddev);
-err_dma_reg:
-err_irq:
- cleanup_chans(cdd);
err_chans:
deinit_cppi41(dev, cdd);
err_init_cppi:
pm_runtime_dont_use_autosuspend(dev);
+err_get_n_chans:
err_get_sync:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
- iounmap(cdd->usbss_mem);
- iounmap(cdd->ctrl_mem);
- iounmap(cdd->sched_mem);
- iounmap(cdd->qmgr_mem);
return ret;
}
@@ -1110,12 +1135,7 @@ static int cppi41_dma_remove(struct platform_device *pdev)
dma_async_device_unregister(&cdd->ddev);
devm_free_irq(&pdev->dev, cdd->irq, cdd);
- cleanup_chans(cdd);
deinit_cppi41(&pdev->dev, cdd);
- iounmap(cdd->usbss_mem);
- iounmap(cdd->ctrl_mem);
- iounmap(cdd->sched_mem);
- iounmap(cdd->qmgr_mem);
pm_runtime_dont_use_autosuspend(&pdev->dev);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 01:48:24 +0000