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Message-Id: <1350566815-409-5-git-send-email-mporter@ti.com>
Date: Thu, 18 Oct 2012 09:26:43 -0400
From: Matt Porter <mporter@...com>
To: Tony Lindgren <tony@...mide.com>, Sekhar Nori <nsekhar@...com>,
Grant Likely <grant.likely@...retlab.ca>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Benoit Cousson <b-cousson@...com>,
Russell King <linux@....linux.org.uk>,
Vinod Koul <vinod.koul@...el.com>,
Rob Landley <rob@...dley.net>, Chris Ball <cjb@...top.org>
Cc: Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
Linux OMAP List <linux-omap@...r.kernel.org>,
Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
Linux DaVinci Kernel List
<davinci-linux-open-source@...ux.davincidsp.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux Documentation List <linux-doc@...r.kernel.org>,
Linux MMC List <linux-mmc@...r.kernel.org>,
Linux SPI Devel List
<spi-devel-general@...ts.sourceforge.net>,
Arnd Bergmann <arnd@...db.de>, Dan Williams <djbw@...com>,
Rob Herring <rob.herring@...xeda.com>
Subject: [RFC PATCH v3 04/16] ARM: edma: add DT and runtime PM support for AM33XX
Adds support for parsing the TI EDMA DT data into the required
EDMA private API platform data.
Calls runtime PM API only in the DT case in order to unidle the
associated hwmods on AM33XX.
Signed-off-by: Matt Porter <mporter@...com>
---
arch/arm/common/edma.c | 255 +++++++++++++++++++++++++--
arch/arm/mach-davinci/board-da830-evm.c | 4 +-
arch/arm/mach-davinci/board-da850-evm.c | 8 +-
arch/arm/mach-davinci/board-dm646x-evm.c | 4 +-
arch/arm/mach-davinci/board-omapl138-hawk.c | 8 +-
arch/arm/mach-davinci/devices-da8xx.c | 8 +-
arch/arm/mach-davinci/devices-tnetv107x.c | 4 +-
arch/arm/mach-davinci/dm355.c | 4 +-
arch/arm/mach-davinci/dm365.c | 4 +-
arch/arm/mach-davinci/dm644x.c | 4 +-
arch/arm/mach-davinci/dm646x.c | 4 +-
include/linux/platform_data/edma.h | 8 +-
12 files changed, 272 insertions(+), 43 deletions(-)
diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index a3d189d..6d2a590 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -24,6 +24,13 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
+#include <linux/edma.h>
+#include <linux/err.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_dma.h>
+#include <linux/of_irq.h>
+#include <linux/pm_runtime.h>
#include <linux/platform_data/edma.h>
@@ -1366,31 +1373,237 @@ void edma_clear_event(unsigned channel)
EXPORT_SYMBOL(edma_clear_event);
/*-----------------------------------------------------------------------*/
+static int edma_of_read_u32_to_s8_array(const struct device_node *np,
+ const char *propname, s8 *out_values,
+ size_t sz)
+{
+ struct property *prop = of_find_property(np, propname, NULL);
+ const __be32 *val;
+
+ if (!prop)
+ return -EINVAL;
+ if (!prop->value)
+ return -ENODATA;
+ if ((sz * sizeof(u32)) > prop->length)
+ return -EOVERFLOW;
+
+ val = prop->value;
+
+ while (sz--)
+ *out_values++ = (s8)(be32_to_cpup(val++) & 0xff);
+
+ /* Terminate it */
+ *out_values++ = -1;
+ *out_values++ = -1;
+
+ return 0;
+}
+
+static int edma_of_read_u32_to_s16_array(const struct device_node *np,
+ const char *propname, s16 *out_values,
+ size_t sz)
+{
+ struct property *prop = of_find_property(np, propname, NULL);
+ const __be32 *val;
+
+ if (!prop)
+ return -EINVAL;
+ if (!prop->value)
+ return -ENODATA;
+ if ((sz * sizeof(u32)) > prop->length)
+ return -EOVERFLOW;
+
+ val = prop->value;
+
+ while (sz--)
+ *out_values++ = (s16)(be32_to_cpup(val++) & 0xffff);
+
+ /* Terminate it */
+ *out_values++ = -1;
+ *out_values++ = -1;
+
+ return 0;
+}
+
+static int edma_of_parse_dt(struct device *dev,
+ struct device_node *node,
+ struct edma_soc_info *pdata)
+{
+ int ret = 0;
+ u32 value;
+ struct property *prop;
+ size_t sz;
+ struct edma_rsv_info *rsv_info;
+ s16 (*rsv_chans)[2], (*rsv_slots)[2];
+ s8 (*queue_tc_map)[2], (*queue_priority_map)[2];
+
+ ret = of_property_read_u32(node, "dma-channels", &value);
+ if (ret < 0)
+ return ret;
+ pdata->n_channel = value;
+
+ ret = of_property_read_u32(node, "ti,edma-regions", &value);
+ if (ret < 0)
+ return ret;
+ pdata->n_region = value;
+
+ ret = of_property_read_u32(node, "ti,edma-slots", &value);
+ if (ret < 0)
+ return ret;
+ pdata->n_slot = value;
+
+ pdata->n_cc = 1;
+ /* This is unused */
+ pdata->n_tc = 3;
+
+ rsv_info =
+ devm_kzalloc(dev, sizeof(struct edma_rsv_info), GFP_KERNEL);
+ if (!rsv_info)
+ return -ENOMEM;
+ pdata->rsv = rsv_info;
+
+ /* Build the reserved channel/slots arrays */
+ prop = of_find_property(node, "ti,edma-reserved-channels", &sz);
+ if (prop) {
+ rsv_chans = devm_kzalloc(dev,
+ sz/sizeof(s16) + 2*sizeof(s16),
+ GFP_KERNEL);
+ if (!rsv_chans)
+ return -ENOMEM;
+ pdata->rsv->rsv_chans = rsv_chans;
+
+ ret = edma_of_read_u32_to_s16_array(node,
+ "ti,edma-reserved-channels",
+ (s16 *)rsv_chans,
+ sz/sizeof(u32));
+ if (ret < 0)
+ return ret;
+ }
+
+ prop = of_find_property(node, "ti,edma-reserved-slots", &sz);
+ if (prop) {
+ rsv_slots = devm_kzalloc(dev,
+ sz/sizeof(s16) + 2*sizeof(s16),
+ GFP_KERNEL);
+ if (!rsv_slots)
+ return -ENOMEM;
+ pdata->rsv->rsv_slots = rsv_slots;
+
+ ret = edma_of_read_u32_to_s16_array(node,
+ "ti,edma-reserved-slots",
+ (s16 *)rsv_slots,
+ sz/sizeof(u32));
+ if (ret < 0)
+ return ret;
+ }
+
+ prop = of_find_property(node, "ti,edma-queue-tc-map", &sz);
+ if (!prop)
+ return -EINVAL;
+
+ queue_tc_map = devm_kzalloc(dev,
+ sz/sizeof(s8) + 2*sizeof(s8),
+ GFP_KERNEL);
+ if (!queue_tc_map)
+ return -ENOMEM;
+ pdata->queue_tc_mapping = queue_tc_map;
+
+ ret = edma_of_read_u32_to_s8_array(node,
+ "ti,edma-queue-tc-map",
+ (s8 *)queue_tc_map,
+ sz/sizeof(u32));
+ if (ret < 0)
+ return ret;
+
+ prop = of_find_property(node, "ti,edma-queue-priority-map", &sz);
+ if (!prop)
+ return -EINVAL;
+
+ queue_priority_map = devm_kzalloc(dev,
+ sz/sizeof(s8) + 2*sizeof(s8),
+ GFP_KERNEL);
+ if (!queue_priority_map)
+ return -ENOMEM;
+ pdata->queue_priority_mapping = queue_priority_map;
+
+ ret = edma_of_read_u32_to_s8_array(node,
+ "ti,edma-queue-tc-map",
+ (s8 *)queue_priority_map,
+ sz/sizeof(u32));
+ if (ret < 0)
+ return ret;
+
+ ret = of_property_read_u32(node, "ti,edma-default-queue", &value);
+ if (ret < 0)
+ return ret;
+ pdata->default_queue = value;
+
+ return ret;
+}
+
+static struct of_dma_filter_info edma_filter_info = {
+ .filter_fn = edma_filter_fn,
+};
static int __init edma_probe(struct platform_device *pdev)
{
struct edma_soc_info **info = pdev->dev.platform_data;
- const s8 (*queue_priority_mapping)[2];
- const s8 (*queue_tc_mapping)[2];
+ s8 (*queue_priority_mapping)[2];
+ s8 (*queue_tc_mapping)[2];
int i, j, off, ln, found = 0;
int status = -1;
- const s16 (*rsv_chans)[2];
- const s16 (*rsv_slots)[2];
+ s16 (*rsv_chans)[2];
+ s16 (*rsv_slots)[2];
int irq[EDMA_MAX_CC] = {0, 0};
int err_irq[EDMA_MAX_CC] = {0, 0};
- struct resource *r[EDMA_MAX_CC] = {NULL};
+ struct resource *r[EDMA_MAX_CC] = {NULL, NULL};
+ struct resource res[EDMA_MAX_CC];
resource_size_t len[EDMA_MAX_CC];
char res_name[10];
char irq_name[10];
+ struct device_node *node = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct edma_soc_info *pdata;
+ int ret;
+
+ if (node) {
+ pdata = devm_kzalloc(dev,
+ sizeof(struct edma_soc_info),
+ GFP_KERNEL);
+ edma_of_parse_dt(dev, node, pdata);
+ info = &pdata;
+ dma_cap_set(DMA_SLAVE, edma_filter_info.dma_cap);
+ of_dma_controller_register(dev->of_node,
+ of_dma_simple_xlate,
+ &edma_filter_info);
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(dev);
+ if (IS_ERR_VALUE(ret)) {
+ dev_err(dev, "pm_runtime_get_sync() failed\n");
+ return ret;
+ }
+ }
if (!info)
return -ENODEV;
for (j = 0; j < EDMA_MAX_CC; j++) {
- sprintf(res_name, "edma_cc%d", j);
- r[j] = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ if (!info[j]) {
+ if (!found)
+ return -ENODEV;
+ break;
+ }
+ if (node) {
+ ret = of_address_to_resource(node, j, &res[j]);
+ if (!IS_ERR_VALUE(ret))
+ r[j] = &res[j];
+ } else {
+ sprintf(res_name, "edma_cc%d", j);
+ r[j] = platform_get_resource_byname(pdev,
+ IORESOURCE_MEM,
res_name);
- if (!r[j] || !info[j]) {
+ }
+ if (!r[j]) {
if (found)
break;
else
@@ -1465,8 +1678,12 @@ static int __init edma_probe(struct platform_device *pdev)
}
}
- sprintf(irq_name, "edma%d", j);
- irq[j] = platform_get_irq_byname(pdev, irq_name);
+ if (node)
+ irq[j] = irq_of_parse_and_map(node, 0);
+ else {
+ sprintf(irq_name, "edma%d", j);
+ irq[j] = platform_get_irq_byname(pdev, irq_name);
+ }
edma_cc[j]->irq_res_start = irq[j];
status = request_irq(irq[j], dma_irq_handler, 0, "edma",
&pdev->dev);
@@ -1476,8 +1693,12 @@ static int __init edma_probe(struct platform_device *pdev)
goto fail;
}
- sprintf(irq_name, "edma%d_err", j);
- err_irq[j] = platform_get_irq_byname(pdev, irq_name);
+ if (node)
+ err_irq[j] = irq_of_parse_and_map(node, 2);
+ else {
+ sprintf(irq_name, "edma%d_err", j);
+ err_irq[j] = platform_get_irq_byname(pdev, irq_name);
+ }
edma_cc[j]->irq_res_end = err_irq[j];
status = request_irq(err_irq[j], dma_ccerr_handler, 0,
"edma_error", &pdev->dev);
@@ -1538,9 +1759,17 @@ fail1:
return status;
}
+static const struct of_device_id edma_of_ids[] = {
+ { .compatible = "ti,edma3", },
+ {}
+};
static struct platform_driver edma_driver = {
- .driver.name = "edma",
+ .driver = {
+ .name = "edma",
+ .of_match_table = edma_of_ids,
+ },
+ .probe = edma_probe,
};
static int __init edma_init(void)
diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index 95b5e10..ffcbec1 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -512,7 +512,7 @@ static struct davinci_i2c_platform_data da830_evm_i2c_0_pdata = {
* example: Timer, GPIO, UART events etc) on da830/omap-l137 EVM, hence
* they are being reserved for codecs on the DSP side.
*/
-static const s16 da830_dma_rsv_chans[][2] = {
+static s16 da830_dma_rsv_chans[][2] = {
/* (offset, number) */
{ 8, 2},
{12, 2},
@@ -521,7 +521,7 @@ static const s16 da830_dma_rsv_chans[][2] = {
{-1, -1}
};
-static const s16 da830_dma_rsv_slots[][2] = {
+static s16 da830_dma_rsv_slots[][2] = {
/* (offset, number) */
{ 8, 2},
{12, 2},
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 32ee3f8..f207965 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -1097,7 +1097,7 @@ device_initcall(da850_evm_config_emac);
* example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM, hence
* they are being reserved for codecs on the DSP side.
*/
-static const s16 da850_dma0_rsv_chans[][2] = {
+static s16 da850_dma0_rsv_chans[][2] = {
/* (offset, number) */
{ 8, 6},
{24, 4},
@@ -1105,7 +1105,7 @@ static const s16 da850_dma0_rsv_chans[][2] = {
{-1, -1}
};
-static const s16 da850_dma0_rsv_slots[][2] = {
+static s16 da850_dma0_rsv_slots[][2] = {
/* (offset, number) */
{ 8, 6},
{24, 4},
@@ -1113,14 +1113,14 @@ static const s16 da850_dma0_rsv_slots[][2] = {
{-1, -1}
};
-static const s16 da850_dma1_rsv_chans[][2] = {
+static s16 da850_dma1_rsv_chans[][2] = {
/* (offset, number) */
{ 0, 28},
{30, 2},
{-1, -1}
};
-static const s16 da850_dma1_rsv_slots[][2] = {
+static s16 da850_dma1_rsv_slots[][2] = {
/* (offset, number) */
{ 0, 28},
{30, 90},
diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
index 1dbf85b..6c5b814 100644
--- a/arch/arm/mach-davinci/board-dm646x-evm.c
+++ b/arch/arm/mach-davinci/board-dm646x-evm.c
@@ -764,7 +764,7 @@ static struct davinci_uart_config uart_config __initdata = {
* example: Timer, GPIO, UART events etc) on dm646x, hence they are being
* reserved for codecs on the DSP side.
*/
-static const s16 dm646x_dma_rsv_chans[][2] = {
+static s16 dm646x_dma_rsv_chans[][2] = {
/* (offset, number) */
{ 0, 4},
{13, 3},
@@ -774,7 +774,7 @@ static const s16 dm646x_dma_rsv_chans[][2] = {
{-1, -1}
};
-static const s16 dm646x_dma_rsv_slots[][2] = {
+static s16 dm646x_dma_rsv_slots[][2] = {
/* (offset, number) */
{ 0, 4},
{13, 3},
diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index dc1208e..09c34f8 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -70,7 +70,7 @@ static __init void omapl138_hawk_config_emac(void)
* example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
* hence they are being reserved for codecs on the DSP side.
*/
-static const s16 da850_dma0_rsv_chans[][2] = {
+static s16 da850_dma0_rsv_chans[][2] = {
/* (offset, number) */
{ 8, 6},
{24, 4},
@@ -78,7 +78,7 @@ static const s16 da850_dma0_rsv_chans[][2] = {
{-1, -1}
};
-static const s16 da850_dma0_rsv_slots[][2] = {
+static s16 da850_dma0_rsv_slots[][2] = {
/* (offset, number) */
{ 8, 6},
{24, 4},
@@ -86,14 +86,14 @@ static const s16 da850_dma0_rsv_slots[][2] = {
{-1, -1}
};
-static const s16 da850_dma1_rsv_chans[][2] = {
+static s16 da850_dma1_rsv_chans[][2] = {
/* (offset, number) */
{ 0, 28},
{30, 2},
{-1, -1}
};
-static const s16 da850_dma1_rsv_slots[][2] = {
+static s16 da850_dma1_rsv_slots[][2] = {
/* (offset, number) */
{ 0, 28},
{30, 90},
diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index bd2f72b..1f9c6ff 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -103,27 +103,27 @@ struct platform_device da8xx_serial_device = {
},
};
-static const s8 da8xx_queue_tc_mapping[][2] = {
+static s8 da8xx_queue_tc_mapping[][2] = {
/* {event queue no, TC no} */
{0, 0},
{1, 1},
{-1, -1}
};
-static const s8 da8xx_queue_priority_mapping[][2] = {
+static s8 da8xx_queue_priority_mapping[][2] = {
/* {event queue no, Priority} */
{0, 3},
{1, 7},
{-1, -1}
};
-static const s8 da850_queue_tc_mapping[][2] = {
+static s8 da850_queue_tc_mapping[][2] = {
/* {event queue no, TC no} */
{0, 0},
{-1, -1}
};
-static const s8 da850_queue_priority_mapping[][2] = {
+static s8 da850_queue_priority_mapping[][2] = {
/* {event queue no, Priority} */
{0, 3},
{-1, -1}
diff --git a/arch/arm/mach-davinci/devices-tnetv107x.c b/arch/arm/mach-davinci/devices-tnetv107x.c
index 59efd7f..d2453c9 100644
--- a/arch/arm/mach-davinci/devices-tnetv107x.c
+++ b/arch/arm/mach-davinci/devices-tnetv107x.c
@@ -58,14 +58,14 @@
#define TNETV107X_DMACH_SDIO1_RX 28
#define TNETV107X_DMACH_SDIO1_TX 29
-static const s8 edma_tc_mapping[][2] = {
+static s8 edma_tc_mapping[][2] = {
/* event queue no TC no */
{ 0, 0 },
{ 1, 1 },
{ -1, -1 }
};
-static const s8 edma_priority_mapping[][2] = {
+static s8 edma_priority_mapping[][2] = {
/* event queue no Prio */
{ 0, 3 },
{ 1, 7 },
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index b165c27..cdefef3 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -567,7 +567,7 @@ static u8 dm355_default_priorities[DAVINCI_N_AINTC_IRQ] = {
/*----------------------------------------------------------------------*/
-static const s8
+static s8
queue_tc_mapping[][2] = {
/* {event queue no, TC no} */
{0, 0},
@@ -575,7 +575,7 @@ queue_tc_mapping[][2] = {
{-1, -1},
};
-static const s8
+static s8
queue_priority_mapping[][2] = {
/* {event queue no, Priority} */
{0, 3},
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index a611716..801e162 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -822,7 +822,7 @@ static u8 dm365_default_priorities[DAVINCI_N_AINTC_IRQ] = {
};
/* Four Transfer Controllers on DM365 */
-static const s8
+static s8
dm365_queue_tc_mapping[][2] = {
/* {event queue no, TC no} */
{0, 0},
@@ -832,7 +832,7 @@ dm365_queue_tc_mapping[][2] = {
{-1, -1},
};
-static const s8
+static s8
dm365_queue_priority_mapping[][2] = {
/* {event queue no, Priority} */
{0, 7},
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 90f5639..4799fd9 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -497,7 +497,7 @@ static u8 dm644x_default_priorities[DAVINCI_N_AINTC_IRQ] = {
/*----------------------------------------------------------------------*/
-static const s8
+static s8
queue_tc_mapping[][2] = {
/* {event queue no, TC no} */
{0, 0},
@@ -505,7 +505,7 @@ queue_tc_mapping[][2] = {
{-1, -1},
};
-static const s8
+static s8
queue_priority_mapping[][2] = {
/* {event queue no, Priority} */
{0, 3},
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index 08f9dab..b4a4da6 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -531,7 +531,7 @@ static u8 dm646x_default_priorities[DAVINCI_N_AINTC_IRQ] = {
/*----------------------------------------------------------------------*/
/* Four Transfer Controllers on DM646x */
-static const s8
+static s8
dm646x_queue_tc_mapping[][2] = {
/* {event queue no, TC no} */
{0, 0},
@@ -541,7 +541,7 @@ dm646x_queue_tc_mapping[][2] = {
{-1, -1},
};
-static const s8
+static s8
dm646x_queue_priority_mapping[][2] = {
/* {event queue no, Priority} */
{0, 4},
diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h
index 7396f0b3..b20b586 100644
--- a/include/linux/platform_data/edma.h
+++ b/include/linux/platform_data/edma.h
@@ -168,8 +168,8 @@ void edma_resume(unsigned channel);
struct edma_rsv_info {
- const s16 (*rsv_chans)[2];
- const s16 (*rsv_slots)[2];
+ s16 (*rsv_chans)[2];
+ s16 (*rsv_slots)[2];
};
/* platform_data for EDMA driver */
@@ -191,8 +191,8 @@ struct edma_soc_info {
/* Resource reservation for other cores */
struct edma_rsv_info *rsv;
- const s8 (*queue_tc_mapping)[2];
- const s8 (*queue_priority_mapping)[2];
+ s8 (*queue_tc_mapping)[2];
+ s8 (*queue_priority_mapping)[2];
};
#endif
--
1.7.9.5
--
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