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USB: host: Introduce flag to enable use of 64-bit dma_mask for ehci-platform

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ehci-octeon driver used a 64-bit dma_mask. With removal of ehci-octeon
and usage of ehci-platform ehci dma_mask is now limited to 32 bits
(coerced in ehci_platform_probe).

Provide a flag in ehci platform data to allow use of 64 bits for
dma_mask.

Cc: David Daney <david.daney@cavium.com>
Cc: Alex Smith <alex.smith@imgtec.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Herrmann 2015-01-12 16:05:52 +01:00 committed by Greg Kroah-Hartman
parent a5790e9e83
commit c99e76c55f
3 changed files with 4 additions and 4 deletions
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4
arch/mips/cavium-octeon/octeon-platform.c
View File

@ -310,6 +310,7 @@ static struct usb_ehci_pdata octeon_ehci_pdata = {
#ifdef __BIG_ENDIAN
.big_endian_mmio = 1,
#endif
.dma_mask_64 = 1,
.power_on = octeon_ehci_power_on,
.power_off = octeon_ehci_power_off,
};
@ -331,8 +332,6 @@ static void __init octeon_ehci_hw_start(struct device *dev)
octeon2_usb_clocks_stop();
}
static u64 octeon_ehci_dma_mask = DMA_BIT_MASK(64);
static int __init octeon_ehci_device_init(void)
{
struct platform_device *pd;
@ -347,7 +346,6 @@ static int __init octeon_ehci_device_init(void)
if (!pd)
return 0;
pd->dev.dma_mask = &octeon_ehci_dma_mask;
pd->dev.platform_data = &octeon_ehci_pdata;
octeon_ehci_hw_start(&pd->dev);

3
drivers/usb/host/ehci-platform.c
View File

@ -155,7 +155,8 @@ static int ehci_platform_probe(struct platform_device *dev)
if (!pdata)
pdata = &ehci_platform_defaults;
err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
err = dma_coerce_mask_and_coherent(&dev->dev,
pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
if (err)
return err;

1
include/linux/usb/ehci_pdriver.h
View File

@ -48,6 +48,7 @@ struct usb_ehci_pdata {
unsigned big_endian_mmio:1;
unsigned no_io_watchdog:1;
unsigned reset_on_resume:1;
unsigned dma_mask_64:1;
/* Turn on all power and clocks */
int (*power_on)(struct platform_device *pdev);