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dmaengine: qcom_hidma: Add support for the new revision 

Add support for probing the newer HW and also organize MSI capable hardware
into an array for maintenance reasons.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Sinan Kaya 2017-12-13 02:20:52 -05:00 committed by Vinod Koul
parent afc996a368
commit 95fbfb7aa2
1 changed files with 13 additions and 21 deletions
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34
drivers/dma/qcom/hidma.c
View File

@ -50,6 +50,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/of_dma.h>
#include <linux/of_device.h>
#include <linux/property.h>
#include <linux/delay.h>
#include <linux/acpi.h>
@ -104,6 +105,9 @@ static unsigned int nr_desc_prm;
module_param(nr_desc_prm, uint, 0644);
MODULE_PARM_DESC(nr_desc_prm, "number of descriptors (default: 0)");
enum hidma_cap {
HIDMA_MSI_CAP = 1,
};
/* process completed descriptors */
static void hidma_process_completed(struct hidma_chan *mchan)
@ -736,25 +740,12 @@ static int hidma_request_msi(struct hidma_dev *dmadev,
#endif
}
static bool hidma_msi_capable(struct device *dev)
static bool hidma_test_capability(struct device *dev, enum hidma_cap test_cap)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
const char *of_compat;
int ret = -EINVAL;
enum hidma_cap cap;
if (!adev || acpi_disabled) {
ret = device_property_read_string(dev, "compatible",
&of_compat);
if (ret)
return false;
ret = strcmp(of_compat, "qcom,hidma-1.1");
} else {
#ifdef CONFIG_ACPI
ret = strcmp(acpi_device_hid(adev), "QCOM8062");
#endif
}
return ret == 0;
cap = (enum hidma_cap) device_get_match_data(dev);
return cap ? ((cap & test_cap) > 0) : 0;
}
static int hidma_probe(struct platform_device *pdev)
@ -834,8 +825,7 @@ static int hidma_probe(struct platform_device *pdev)
* Determine the MSI capability of the platform. Old HW doesn't
* support MSI.
*/
msi = hidma_msi_capable(&pdev->dev);
msi = hidma_test_capability(&pdev->dev, HIDMA_MSI_CAP);
device_property_read_u32(&pdev->dev, "desc-count",
&dmadev->nr_descriptors);
@ -953,7 +943,8 @@ static int hidma_remove(struct platform_device *pdev)
#if IS_ENABLED(CONFIG_ACPI)
static const struct acpi_device_id hidma_acpi_ids[] = {
{"QCOM8061"},
{"QCOM8062"},
{"QCOM8062", HIDMA_MSI_CAP},
{"QCOM8063", HIDMA_MSI_CAP},
{},
};
MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@ -961,7 +952,8 @@ MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
static const struct of_device_id hidma_match[] = {
{.compatible = "qcom,hidma-1.0",},
{.compatible = "qcom,hidma-1.1",},
{.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},
{.compatible = "qcom,hidma-1.2", .data = (void *)(HIDMA_MSI_CAP),},
{},
};
MODULE_DEVICE_TABLE(of, hidma_match);