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dmaengine: dw: we do support Merrifield SoC in PCI mode

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Intel Merrifield platform contains Intel integrated DMA (iDMA 32-bit) which has
a slightly different register mapping, e.g. some bits in CTL_* and CFG_*
channel registers, and has to use platform data since there is no
autoconfiguration.

The iDMA 32-bit specification is available in the publicly available
documentation for Intel Braswell and BayTrail SoCs as LPE Audio DMA.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2017-01-17 13:57:32 +02:00 committed by Vinod Koul
parent 199244d694
commit f7c799e950
1 changed files with 15 additions and 0 deletions
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15
drivers/dma/dw/pci.c
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@ -15,6 +15,18 @@
#include "internal.h" #include "internal.h"
static struct dw_dma_platform_data mrfld_pdata = {
.nr_channels = 8,
.is_private = true,
.is_memcpy = true,
.is_idma32 = true,
.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
.chan_priority = CHAN_PRIORITY_ASCENDING,
.block_size = 131071,
.nr_masters = 1,
.data_width = {4},
};
static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
{ {
const struct dw_dma_platform_data *pdata = (void *)pid->driver_data; const struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
@ -103,6 +115,9 @@ static const struct pci_device_id dw_pci_id_table[] = {
{ PCI_VDEVICE(INTEL, 0x0f06) }, { PCI_VDEVICE(INTEL, 0x0f06) },
{ PCI_VDEVICE(INTEL, 0x0f40) }, { PCI_VDEVICE(INTEL, 0x0f40) },
/* Merrifield iDMA 32-bit (GPDMA) */
{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },
/* Braswell */ /* Braswell */
{ PCI_VDEVICE(INTEL, 0x2286) }, { PCI_VDEVICE(INTEL, 0x2286) },
{ PCI_VDEVICE(INTEL, 0x22c0) }, { PCI_VDEVICE(INTEL, 0x22c0) },