kernel-ark/arch/arm/plat-iop/adma.c
Dan Williams 2492c84518 iop3xx: surface the iop3xx DMA and AAU units to the iop-adma driver
Adds the platform device definitions and the architecture specific support
routines (i.e. register initialization and descriptor formats) for the
iop-adma driver.

Changelog:
* add support for > 1k zero sum buffer sizes
* added dma/aau platform devices to iq80321 and iq80332 setup
* fixed the calculation in iop_desc_is_aligned
* support xor buffer sizes larger than 16MB
* fix places where software descriptors are assumed to be contiguous, only
  hardware descriptors are contiguous for up to a PAGE_SIZE buffer size
* convert to async_tx
* add interrupt support
* add platform devices for 80219 boards
* do not call platform register macros in driver code
* remove switch() statements for compatible register offsets/layouts
* change over to bitmap based capabilities
* remove unnecessary ARM assembly statement
* checkpatch.pl fixes
* gpl v2 only correction
* phys move to dma_async_tx_descriptor

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2007-07-13 08:06:19 -07:00

210 lines
5.4 KiB
C

/*
* platform device definitions for the iop3xx dma/xor engines
* Copyright © 2006, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/platform_device.h>
#include <asm/hardware/iop3xx.h>
#include <linux/dma-mapping.h>
#include <asm/arch/adma.h>
#include <asm/hardware/iop_adma.h>
#ifdef CONFIG_ARCH_IOP32X
#define IRQ_DMA0_EOT IRQ_IOP32X_DMA0_EOT
#define IRQ_DMA0_EOC IRQ_IOP32X_DMA0_EOC
#define IRQ_DMA0_ERR IRQ_IOP32X_DMA0_ERR
#define IRQ_DMA1_EOT IRQ_IOP32X_DMA1_EOT
#define IRQ_DMA1_EOC IRQ_IOP32X_DMA1_EOC
#define IRQ_DMA1_ERR IRQ_IOP32X_DMA1_ERR
#define IRQ_AA_EOT IRQ_IOP32X_AA_EOT
#define IRQ_AA_EOC IRQ_IOP32X_AA_EOC
#define IRQ_AA_ERR IRQ_IOP32X_AA_ERR
#endif
#ifdef CONFIG_ARCH_IOP33X
#define IRQ_DMA0_EOT IRQ_IOP33X_DMA0_EOT
#define IRQ_DMA0_EOC IRQ_IOP33X_DMA0_EOC
#define IRQ_DMA0_ERR IRQ_IOP33X_DMA0_ERR
#define IRQ_DMA1_EOT IRQ_IOP33X_DMA1_EOT
#define IRQ_DMA1_EOC IRQ_IOP33X_DMA1_EOC
#define IRQ_DMA1_ERR IRQ_IOP33X_DMA1_ERR
#define IRQ_AA_EOT IRQ_IOP33X_AA_EOT
#define IRQ_AA_EOC IRQ_IOP33X_AA_EOC
#define IRQ_AA_ERR IRQ_IOP33X_AA_ERR
#endif
/* AAU and DMA Channels */
static struct resource iop3xx_dma_0_resources[] = {
[0] = {
.start = IOP3XX_DMA_PHYS_BASE(0),
.end = IOP3XX_DMA_UPPER_PA(0),
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_DMA0_EOT,
.end = IRQ_DMA0_EOT,
.flags = IORESOURCE_IRQ
},
[2] = {
.start = IRQ_DMA0_EOC,
.end = IRQ_DMA0_EOC,
.flags = IORESOURCE_IRQ
},
[3] = {
.start = IRQ_DMA0_ERR,
.end = IRQ_DMA0_ERR,
.flags = IORESOURCE_IRQ
}
};
static struct resource iop3xx_dma_1_resources[] = {
[0] = {
.start = IOP3XX_DMA_PHYS_BASE(1),
.end = IOP3XX_DMA_UPPER_PA(1),
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_DMA1_EOT,
.end = IRQ_DMA1_EOT,
.flags = IORESOURCE_IRQ
},
[2] = {
.start = IRQ_DMA1_EOC,
.end = IRQ_DMA1_EOC,
.flags = IORESOURCE_IRQ
},
[3] = {
.start = IRQ_DMA1_ERR,
.end = IRQ_DMA1_ERR,
.flags = IORESOURCE_IRQ
}
};
static struct resource iop3xx_aau_resources[] = {
[0] = {
.start = IOP3XX_AAU_PHYS_BASE,
.end = IOP3XX_AAU_UPPER_PA,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_AA_EOT,
.end = IRQ_AA_EOT,
.flags = IORESOURCE_IRQ
},
[2] = {
.start = IRQ_AA_EOC,
.end = IRQ_AA_EOC,
.flags = IORESOURCE_IRQ
},
[3] = {
.start = IRQ_AA_ERR,
.end = IRQ_AA_ERR,
.flags = IORESOURCE_IRQ
}
};
static u64 iop3xx_adma_dmamask = DMA_32BIT_MASK;
static struct iop_adma_platform_data iop3xx_dma_0_data = {
.hw_id = DMA0_ID,
.pool_size = PAGE_SIZE,
};
static struct iop_adma_platform_data iop3xx_dma_1_data = {
.hw_id = DMA1_ID,
.pool_size = PAGE_SIZE,
};
static struct iop_adma_platform_data iop3xx_aau_data = {
.hw_id = AAU_ID,
.pool_size = 3 * PAGE_SIZE,
};
struct platform_device iop3xx_dma_0_channel = {
.name = "iop-adma",
.id = 0,
.num_resources = 4,
.resource = iop3xx_dma_0_resources,
.dev = {
.dma_mask = &iop3xx_adma_dmamask,
.coherent_dma_mask = DMA_64BIT_MASK,
.platform_data = (void *) &iop3xx_dma_0_data,
},
};
struct platform_device iop3xx_dma_1_channel = {
.name = "iop-adma",
.id = 1,
.num_resources = 4,
.resource = iop3xx_dma_1_resources,
.dev = {
.dma_mask = &iop3xx_adma_dmamask,
.coherent_dma_mask = DMA_64BIT_MASK,
.platform_data = (void *) &iop3xx_dma_1_data,
},
};
struct platform_device iop3xx_aau_channel = {
.name = "iop-adma",
.id = 2,
.num_resources = 4,
.resource = iop3xx_aau_resources,
.dev = {
.dma_mask = &iop3xx_adma_dmamask,
.coherent_dma_mask = DMA_64BIT_MASK,
.platform_data = (void *) &iop3xx_aau_data,
},
};
static int __init iop3xx_adma_cap_init(void)
{
#ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */
dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
#else
dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_MEMCPY_CRC32C, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
#endif
#ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */
dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
#else
dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_MEMCPY_CRC32C, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
#endif
#ifdef CONFIG_ARCH_IOP32X /* the 32x AAU does not perform zero sum */
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#else
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_ZERO_SUM, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#endif
return 0;
}
arch_initcall(iop3xx_adma_cap_init);