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Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (26 commits)
  sh: Convert sh to use read/update_persistent_clock
  sh: Move PMB debugfs entry initialization to later stage
  sh: Fix up flush_cache_vmap() on SMP.
  sh: fix up MMU reset with variable PMB mapping sizes.
  sh: establish PMB mappings for NUMA nodes.
  sh: check for existing mappings for bolted PMB entries.
  sh: fixed virt/phys mapping helpers for PMB.
  sh: make pmb iomapping configurable.
  sh: reworked dynamic PMB mapping.
  sh: Fix up cpumask_of_pcibus() for the NUMA build.
  serial: sh-sci: Tidy up build warnings.
  sh: Fix up ctrl_read/write stragglers in migor setup.
  serial: sh-sci: Add DMA support.
  dmaengine: shdma: extend .device_terminate_all() to record partial transfer
  sh: merge sh7722 and sh7724 DMA register definitions
  sh: activate runtime PM for dmaengine on sh7722 and sh7724
  dmaengine: shdma: add runtime PM support.
  dmaengine: shdma: separate DMA headers.
  dmaengine: shdma: convert to platform device resources
  dmaengine: shdma: fix DMA error handling.
  ...
This commit is contained in:
Linus Torvalds 2010-03-07 15:47:19 -08:00
parent 2ddb3b15f1 0272282f7c
commit 4a31c08d2f
35 changed files with 2213 additions and 740 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/sh/boards/mach-migor/setup.c
View File

@ -419,6 +419,9 @@ static struct i2c_board_info migor_i2c_devices[] = {
I2C_BOARD_INFO("migor_ts", 0x51),
.irq = 38, /* IRQ6 */
},
{
I2C_BOARD_INFO("wm8978", 0x1a),
},
};
static struct i2c_board_info migor_i2c_camera[] = {
@ -619,6 +622,19 @@ static int __init migor_devices_setup(void)
platform_resource_setup_memory(&migor_ceu_device, "ceu", 4 << 20);
/* SIU: Port B */
gpio_request(GPIO_FN_SIUBOLR, NULL);
gpio_request(GPIO_FN_SIUBOBT, NULL);
gpio_request(GPIO_FN_SIUBISLD, NULL);
gpio_request(GPIO_FN_SIUBOSLD, NULL);
gpio_request(GPIO_FN_SIUMCKB, NULL);
/*
* The original driver sets SIUB OLR/OBT, ILR/IBT, and SIUA OLR/OBT to
* output. Need only SIUB, set to output for master mode (table 34.2)
*/
__raw_writew(__raw_readw(PORT_MSELCRA) | 1, PORT_MSELCRA);
i2c_register_board_info(0, migor_i2c_devices,
ARRAY_SIZE(migor_i2c_devices));

2
arch/sh/boot/compressed/cache.c
View File

@ -5,7 +5,7 @@ int cache_control(unsigned int command)
for (i = 0; i < (32 * 1024); i += 32) {
(void)*p;
p += (32 / sizeof (int));
p += (32 / sizeof(int));
}
return 0;

4
arch/sh/include/asm/cacheflush.h
View File

@ -86,8 +86,8 @@ extern void copy_from_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr, void *dst, const void *src,
unsigned long len);
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vunmap(start, end) flush_cache_all()
#define flush_cache_vmap(start, end) local_flush_cache_all(NULL)
#define flush_cache_vunmap(start, end) local_flush_cache_all(NULL)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)

51
arch/sh/include/asm/dma-register.h Normal file
View File

@ -0,0 +1,51 @@
/*
* Common header for the legacy SH DMA driver and the new dmaengine driver
*
* extracted from arch/sh/include/asm/dma-sh.h:
*
* Copyright (C) 2000 Takashi YOSHII
* Copyright (C) 2003 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef DMA_REGISTER_H
#define DMA_REGISTER_H
/* DMA register */
#define SAR 0x00
#define DAR 0x04
#define TCR 0x08
#define CHCR 0x0C
#define DMAOR 0x40
/* DMAOR definitions */
#define DMAOR_AE 0x00000004
#define DMAOR_NMIF 0x00000002
#define DMAOR_DME 0x00000001
/* Definitions for the SuperH DMAC */
#define REQ_L 0x00000000
#define REQ_E 0x00080000
#define RACK_H 0x00000000
#define RACK_L 0x00040000
#define ACK_R 0x00000000
#define ACK_W 0x00020000
#define ACK_H 0x00000000
#define ACK_L 0x00010000
#define DM_INC 0x00004000
#define DM_DEC 0x00008000
#define DM_FIX 0x0000c000
#define SM_INC 0x00001000
#define SM_DEC 0x00002000
#define SM_FIX 0x00003000
#define RS_IN 0x00000200
#define RS_OUT 0x00000300
#define TS_BLK 0x00000040
#define TM_BUR 0x00000020
#define CHCR_DE 0x00000001
#define CHCR_TE 0x00000002
#define CHCR_IE 0x00000004
#endif

88
arch/sh/include/asm/dma-sh.h
View File

@ -11,7 +11,8 @@
#ifndef __DMA_SH_H
#define __DMA_SH_H
#include <asm/dma.h>
#include <asm/dma-register.h>
#include <cpu/dma-register.h>
#include <cpu/dma.h>
/* DMAOR contorl: The DMAOR access size is different by CPU.*/
@ -53,34 +54,6 @@ static int dmte_irq_map[] __maybe_unused = {
#endif
};
/* Definitions for the SuperH DMAC */
#define REQ_L 0x00000000
#define REQ_E 0x00080000
#define RACK_H 0x00000000
#define RACK_L 0x00040000
#define ACK_R 0x00000000
#define ACK_W 0x00020000
#define ACK_H 0x00000000
#define ACK_L 0x00010000
#define DM_INC 0x00004000
#define DM_DEC 0x00008000
#define DM_FIX 0x0000c000
#define SM_INC 0x00001000
#define SM_DEC 0x00002000
#define SM_FIX 0x00003000
#define RS_IN 0x00000200
#define RS_OUT 0x00000300
#define TS_BLK 0x00000040
#define TM_BUR 0x00000020
#define CHCR_DE 0x00000001
#define CHCR_TE 0x00000002
#define CHCR_IE 0x00000004
/* DMAOR definitions */
#define DMAOR_AE 0x00000004
#define DMAOR_NMIF 0x00000002
#define DMAOR_DME 0x00000001
/*
* Define the default configuration for dual address memory-memory transfer.
* The 0x400 value represents auto-request, external->external.
@ -111,61 +84,4 @@ static u32 dma_base_addr[] __maybe_unused = {
#endif
};
/* DMA register */
#define SAR 0x00
#define DAR 0x04
#define TCR 0x08
#define CHCR 0x0C
#define DMAOR 0x40
/*
* for dma engine
*
* SuperH DMA mode
*/
#define SHDMA_MIX_IRQ (1 << 1)
#define SHDMA_DMAOR1 (1 << 2)
#define SHDMA_DMAE1 (1 << 3)
enum sh_dmae_slave_chan_id {
SHDMA_SLAVE_SCIF0_TX,
SHDMA_SLAVE_SCIF0_RX,
SHDMA_SLAVE_SCIF1_TX,
SHDMA_SLAVE_SCIF1_RX,
SHDMA_SLAVE_SCIF2_TX,
SHDMA_SLAVE_SCIF2_RX,
SHDMA_SLAVE_SCIF3_TX,
SHDMA_SLAVE_SCIF3_RX,
SHDMA_SLAVE_SCIF4_TX,
SHDMA_SLAVE_SCIF4_RX,
SHDMA_SLAVE_SCIF5_TX,
SHDMA_SLAVE_SCIF5_RX,
SHDMA_SLAVE_SIUA_TX,
SHDMA_SLAVE_SIUA_RX,
SHDMA_SLAVE_SIUB_TX,
SHDMA_SLAVE_SIUB_RX,
SHDMA_SLAVE_NUMBER, /* Must stay last */
};
struct sh_dmae_slave_config {
enum sh_dmae_slave_chan_id slave_id;
dma_addr_t addr;
u32 chcr;
char mid_rid;
};
struct sh_dmae_pdata {
unsigned int mode;
struct sh_dmae_slave_config *config;
int config_num;
};
struct device;
struct sh_dmae_slave {
enum sh_dmae_slave_chan_id slave_id; /* Set by the platform */
struct device *dma_dev; /* Set by the platform */
struct sh_dmae_slave_config *config; /* Set by the driver */
};
#endif /* __DMA_SH_H */

93
arch/sh/include/asm/dmaengine.h Normal file
View File

@ -0,0 +1,93 @@
/*
* Header for the new SH dmaengine driver
*
* Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef ASM_DMAENGINE_H
#define ASM_DMAENGINE_H
#include <linux/dmaengine.h>
#include <linux/list.h>
#include <asm/dma-register.h>
#define SH_DMAC_MAX_CHANNELS 6
enum sh_dmae_slave_chan_id {
SHDMA_SLAVE_SCIF0_TX,
SHDMA_SLAVE_SCIF0_RX,
SHDMA_SLAVE_SCIF1_TX,
SHDMA_SLAVE_SCIF1_RX,
SHDMA_SLAVE_SCIF2_TX,
SHDMA_SLAVE_SCIF2_RX,
SHDMA_SLAVE_SCIF3_TX,
SHDMA_SLAVE_SCIF3_RX,
SHDMA_SLAVE_SCIF4_TX,
SHDMA_SLAVE_SCIF4_RX,
SHDMA_SLAVE_SCIF5_TX,
SHDMA_SLAVE_SCIF5_RX,
SHDMA_SLAVE_SIUA_TX,
SHDMA_SLAVE_SIUA_RX,
SHDMA_SLAVE_SIUB_TX,
SHDMA_SLAVE_SIUB_RX,
SHDMA_SLAVE_NUMBER, /* Must stay last */
};
struct sh_dmae_slave_config {
enum sh_dmae_slave_chan_id slave_id;
dma_addr_t addr;
u32 chcr;
char mid_rid;
};
struct sh_dmae_channel {
unsigned int offset;
unsigned int dmars;
unsigned int dmars_bit;
};
struct sh_dmae_pdata {
struct sh_dmae_slave_config *slave;
int slave_num;
struct sh_dmae_channel *channel;
int channel_num;
unsigned int ts_low_shift;
unsigned int ts_low_mask;
unsigned int ts_high_shift;
unsigned int ts_high_mask;
unsigned int *ts_shift;
int ts_shift_num;
u16 dmaor_init;
};
struct device;
/* Used by slave DMA clients to request DMA to/from a specific peripheral */
struct sh_dmae_slave {
enum sh_dmae_slave_chan_id slave_id; /* Set by the platform */
struct device *dma_dev; /* Set by the platform */
struct sh_dmae_slave_config *config; /* Set by the driver */
};
struct sh_dmae_regs {
u32 sar; /* SAR / source address */
u32 dar; /* DAR / destination address */
u32 tcr; /* TCR / transfer count */
};
struct sh_desc {
struct sh_dmae_regs hw;
struct list_head node;
struct dma_async_tx_descriptor async_tx;
enum dma_data_direction direction;
dma_cookie_t cookie;
size_t partial;
int chunks;
int mark;
};
#endif

23
arch/sh/include/asm/io.h
View File

@ -291,21 +291,21 @@ unsigned long long poke_real_address_q(unsigned long long addr,
* doesn't exist, so everything must go through page tables.
*/
#ifdef CONFIG_MMU
void __iomem *__ioremap_caller(unsigned long offset, unsigned long size,
void __iomem *__ioremap_caller(phys_addr_t offset, unsigned long size,
pgprot_t prot, void *caller);
void __iounmap(void __iomem *addr);
static inline void __iomem *
__ioremap(unsigned long offset, unsigned long size, pgprot_t prot)
__ioremap(phys_addr_t offset, unsigned long size, pgprot_t prot)
{
return __ioremap_caller(offset, size, prot, __builtin_return_address(0));
}
static inline void __iomem *
__ioremap_29bit(unsigned long offset, unsigned long size, pgprot_t prot)
__ioremap_29bit(phys_addr_t offset, unsigned long size, pgprot_t prot)
{
#ifdef CONFIG_29BIT
unsigned long last_addr = offset + size - 1;
phys_addr_t last_addr = offset + size - 1;
/*
* For P1 and P2 space this is trivial, as everything is already
@ -329,7 +329,7 @@ __ioremap_29bit(unsigned long offset, unsigned long size, pgprot_t prot)
}
static inline void __iomem *
__ioremap_mode(unsigned long offset, unsigned long size, pgprot_t prot)
__ioremap_mode(phys_addr_t offset, unsigned long size, pgprot_t prot)
{
void __iomem *ret;
@ -349,35 +349,32 @@ __ioremap_mode(unsigned long offset, unsigned long size, pgprot_t prot)
#define __iounmap(addr) do { } while (0)
#endif /* CONFIG_MMU */
static inline void __iomem *
ioremap(unsigned long offset, unsigned long size)
static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
{
return __ioremap_mode(offset, size, PAGE_KERNEL_NOCACHE);
}
static inline void __iomem *
ioremap_cache(unsigned long offset, unsigned long size)
ioremap_cache(phys_addr_t offset, unsigned long size)
{
return __ioremap_mode(offset, size, PAGE_KERNEL);
}
#ifdef CONFIG_HAVE_IOREMAP_PROT
static inline void __iomem *
ioremap_prot(resource_size_t offset, unsigned long size, unsigned long flags)
ioremap_prot(phys_addr_t offset, unsigned long size, unsigned long flags)
{
return __ioremap_mode(offset, size, __pgprot(flags));
}
#endif
#ifdef CONFIG_IOREMAP_FIXED
extern void __iomem *ioremap_fixed(resource_size_t, unsigned long,
unsigned long, pgprot_t);
extern void __iomem *ioremap_fixed(phys_addr_t, unsigned long, pgprot_t);
extern int iounmap_fixed(void __iomem *);
extern void ioremap_fixed_init(void);
#else
static inline void __iomem *
ioremap_fixed(resource_size_t phys_addr, unsigned long offset,
unsigned long size, pgprot_t prot)
ioremap_fixed(phys_addr_t phys_addr, unsigned long size, pgprot_t prot)
{
BUG();
return NULL;

31
arch/sh/include/asm/mmu.h
View File

@ -55,19 +55,29 @@ typedef struct {
#ifdef CONFIG_PMB
/* arch/sh/mm/pmb.c */
long pmb_remap(unsigned long virt, unsigned long phys,
unsigned long size, pgprot_t prot);
void pmb_unmap(unsigned long addr);
void pmb_init(void);
bool __in_29bit_mode(void);
void pmb_init(void);
int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
unsigned long size, pgprot_t prot);
void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
pgprot_t prot, void *caller);
int pmb_unmap(void __iomem *addr);
#else
static inline long pmb_remap(unsigned long virt, unsigned long phys,
unsigned long size, pgprot_t prot)
static inline void __iomem *
pmb_remap_caller(phys_addr_t phys, unsigned long size,
pgprot_t prot, void *caller)
{
return NULL;
}
static inline int pmb_unmap(void __iomem *addr)
{
return -EINVAL;
}
#define pmb_unmap(addr) do { } while (0)
#define pmb_init(addr) do { } while (0)
#ifdef CONFIG_29BIT
@ -77,6 +87,13 @@ static inline long pmb_remap(unsigned long virt, unsigned long phys,
#endif
#endif /* CONFIG_PMB */
static inline void __iomem *
pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
{
return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
}
#endif /* __ASSEMBLY__ */
#endif /* __MMU_H */

2
arch/sh/include/asm/siu.h
View File

@ -11,7 +11,7 @@
#ifndef ASM_SIU_H
#define ASM_SIU_H
#include <asm/dma-sh.h>
#include <asm/dmaengine.h>
struct device;

2
arch/sh/include/asm/topology.h
View File

@ -35,7 +35,7 @@
#define pcibus_to_node(bus) ((void)(bus), -1)
#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
CPU_MASK_ALL_PTR : \
cpu_all_mask : \
cpumask_of_node(pcibus_to_node(bus)))
#endif

41
arch/sh/include/cpu-sh3/cpu/dma-register.h Normal file
View File

@ -0,0 +1,41 @@
/*
* SH3 CPU-specific DMA definitions, used by both DMA drivers
*
* Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef CPU_DMA_REGISTER_H
#define CPU_DMA_REGISTER_H
#define CHCR_TS_LOW_MASK 0x18
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#define DMAOR_INIT DMAOR_DME
/*
* The SuperH DMAC supports a number of transmit sizes, we list them here,
* with their respective values as they appear in the CHCR registers.
*/
enum {
XMIT_SZ_8BIT,
XMIT_SZ_16BIT,
XMIT_SZ_32BIT,
XMIT_SZ_128BIT,
};
/* log2(size / 8) - used to calculate number of transfers */
#define TS_SHIFT { \
[XMIT_SZ_8BIT] = 0, \
[XMIT_SZ_16BIT] = 1, \
[XMIT_SZ_32BIT] = 2, \
[XMIT_SZ_128BIT] = 4, \
}
#define TS_INDEX2VAL(i) (((i) & 3) << CHCR_TS_LOW_SHIFT)
#endif

27
arch/sh/include/cpu-sh3/cpu/dma.h
View File

@ -20,31 +20,4 @@
#define TS_32 0x00000010
#define TS_128 0x00000018
#define CHCR_TS_LOW_MASK 0x18
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#define DMAOR_INIT DMAOR_DME
/*
* The SuperH DMAC supports a number of transmit sizes, we list them here,
* with their respective values as they appear in the CHCR registers.
*/
enum {
XMIT_SZ_8BIT,
XMIT_SZ_16BIT,
XMIT_SZ_32BIT,
XMIT_SZ_128BIT,
};
#define TS_SHIFT { \
[XMIT_SZ_8BIT] = 0, \
[XMIT_SZ_16BIT] = 1, \
[XMIT_SZ_32BIT] = 2, \
[XMIT_SZ_128BIT] = 4, \
}
#define TS_INDEX2VAL(i) (((i) & 3) << CHCR_TS_LOW_SHIFT)
#endif /* __ASM_CPU_SH3_DMA_H */

112
arch/sh/include/cpu-sh4/cpu/dma-register.h Normal file
View File

@ -0,0 +1,112 @@
/*
* SH4 CPU-specific DMA definitions, used by both DMA drivers
*
* Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef CPU_DMA_REGISTER_H
#define CPU_DMA_REGISTER_H
/* SH7751/7760/7780 DMA IRQ sources */
#ifdef CONFIG_CPU_SH4A
#define DMAOR_INIT DMAOR_DME
#if defined(CONFIG_CPU_SUBTYPE_SH7343) || \
defined(CONFIG_CPU_SUBTYPE_SH7730)
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7722) || \
defined(CONFIG_CPU_SUBTYPE_SH7724)
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0x00300000
#define CHCR_TS_HIGH_SHIFT (20 - 2) /* 2 bits for shifted low TS */
#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
defined(CONFIG_CPU_SUBTYPE_SH7764)
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7723)
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7780)
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#else /* SH7785 */
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#endif
/* Transmit sizes and respective CHCR register values */
enum {
XMIT_SZ_8BIT = 0,
XMIT_SZ_16BIT = 1,
XMIT_SZ_32BIT = 2,
XMIT_SZ_64BIT = 7,
XMIT_SZ_128BIT = 3,
XMIT_SZ_256BIT = 4,
XMIT_SZ_128BIT_BLK = 0xb,
XMIT_SZ_256BIT_BLK = 0xc,
};
/* log2(size / 8) - used to calculate number of transfers */
#define TS_SHIFT { \
[XMIT_SZ_8BIT] = 0, \
[XMIT_SZ_16BIT] = 1, \
[XMIT_SZ_32BIT] = 2, \
[XMIT_SZ_64BIT] = 3, \
[XMIT_SZ_128BIT] = 4, \
[XMIT_SZ_256BIT] = 5, \
[XMIT_SZ_128BIT_BLK] = 4, \
[XMIT_SZ_256BIT_BLK] = 5, \
}
#define TS_INDEX2VAL(i) ((((i) & 3) << CHCR_TS_LOW_SHIFT) | \
((((i) >> 2) & 3) << CHCR_TS_HIGH_SHIFT))
#else /* CONFIG_CPU_SH4A */
#define DMAOR_INIT (0x8000 | DMAOR_DME)
#define CHCR_TS_LOW_MASK 0x70
#define CHCR_TS_LOW_SHIFT 4
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
/* Transmit sizes and respective CHCR register values */
enum {
XMIT_SZ_8BIT = 1,
XMIT_SZ_16BIT = 2,
XMIT_SZ_32BIT = 3,
XMIT_SZ_64BIT = 0,
XMIT_SZ_256BIT = 4,
};
/* log2(size / 8) - used to calculate number of transfers */
#define TS_SHIFT { \
[XMIT_SZ_8BIT] = 0, \
[XMIT_SZ_16BIT] = 1, \
[XMIT_SZ_32BIT] = 2, \
[XMIT_SZ_64BIT] = 3, \
[XMIT_SZ_256BIT] = 5, \
}
#define TS_INDEX2VAL(i) (((i) & 7) << CHCR_TS_LOW_SHIFT)
#endif /* CONFIG_CPU_SH4A */
#endif

62
arch/sh/include/cpu-sh4/cpu/dma-sh4a.h
View File

@ -8,20 +8,12 @@
#define DMAE0_IRQ 78 /* DMA Error IRQ*/
#define SH_DMAC_BASE0 0xFE008020
#define SH_DMARS_BASE0 0xFE009000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7722)
#define DMTE0_IRQ 48
#define DMTE4_IRQ 76
#define DMAE0_IRQ 78 /* DMA Error IRQ*/
#define SH_DMAC_BASE0 0xFE008020
#define SH_DMARS_BASE0 0xFE009000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0x00300000
#define CHCR_TS_HIGH_SHIFT 20
#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
defined(CONFIG_CPU_SUBTYPE_SH7764)
#define DMTE0_IRQ 34
@ -29,10 +21,6 @@
#define DMAE0_IRQ 38
#define SH_DMAC_BASE0 0xFF608020
#define SH_DMARS_BASE0 0xFF609000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7723)
#define DMTE0_IRQ 48 /* DMAC0A*/
#define DMTE4_IRQ 76 /* DMAC0B */
@ -46,10 +34,6 @@
#define SH_DMAC_BASE0 0xFE008020
#define SH_DMAC_BASE1 0xFDC08020
#define SH_DMARS_BASE0 0xFDC09000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#elif defined(CONFIG_CPU_SUBTYPE_SH7724)
#define DMTE0_IRQ 48 /* DMAC0A*/
#define DMTE4_IRQ 76 /* DMAC0B */
@ -64,10 +48,6 @@
#define SH_DMAC_BASE1 0xFDC08020
#define SH_DMARS_BASE0 0xFE009000
#define SH_DMARS_BASE1 0xFDC09000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0x00600000
#define CHCR_TS_HIGH_SHIFT 21
#elif defined(CONFIG_CPU_SUBTYPE_SH7780)
#define DMTE0_IRQ 34
#define DMTE4_IRQ 44
@ -80,10 +60,6 @@
#define SH_DMAC_BASE0 0xFC808020
#define SH_DMAC_BASE1 0xFC818020
#define SH_DMARS_BASE0 0xFC809000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#else /* SH7785 */
#define DMTE0_IRQ 33
#define DMTE4_IRQ 37
@ -97,10 +73,6 @@
#define SH_DMAC_BASE0 0xFC808020
#define SH_DMAC_BASE1 0xFCC08020
#define SH_DMARS_BASE0 0xFC809000
#define CHCR_TS_LOW_MASK 0x00000018
#define CHCR_TS_LOW_SHIFT 3
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#endif
#define REQ_HE 0x000000C0
@ -108,38 +80,4 @@
#define REQ_LE 0x00000040
#define TM_BURST 0x00000020
/*
* The SuperH DMAC supports a number of transmit sizes, we list them here,
* with their respective values as they appear in the CHCR registers.
*
* Defaults to a 64-bit transfer size.
*/
enum {
XMIT_SZ_8BIT = 0,
XMIT_SZ_16BIT = 1,
XMIT_SZ_32BIT = 2,
XMIT_SZ_64BIT = 7,
XMIT_SZ_128BIT = 3,
XMIT_SZ_256BIT = 4,
XMIT_SZ_128BIT_BLK = 0xb,
XMIT_SZ_256BIT_BLK = 0xc,
};
/*
* The DMA count is defined as the number of bytes to transfer.
*/
#define TS_SHIFT { \
[XMIT_SZ_8BIT] = 0, \
[XMIT_SZ_16BIT] = 1, \
[XMIT_SZ_32BIT] = 2, \
[XMIT_SZ_64BIT] = 3, \
[XMIT_SZ_128BIT] = 4, \
[XMIT_SZ_256BIT] = 5, \
[XMIT_SZ_128BIT_BLK] = 4, \
[XMIT_SZ_256BIT_BLK] = 5, \
}
#define TS_INDEX2VAL(i) ((((i) & 3) << CHCR_TS_LOW_SHIFT) | \
((((i) >> 2) & 3) << CHCR_TS_HIGH_SHIFT))
#endif /* __ASM_SH_CPU_SH4_DMA_SH7780_H */

36
arch/sh/include/cpu-sh4/cpu/dma.h
View File

@ -5,9 +5,8 @@
#ifdef CONFIG_CPU_SH4A
#define DMAOR_INIT (DMAOR_DME)
#include <cpu/dma-sh4a.h>
#else /* CONFIG_CPU_SH4A */
/*
* SH7750/SH7751/SH7760
@ -17,7 +16,6 @@
#define DMTE6_IRQ 46
#define DMAE0_IRQ 38
#define DMAOR_INIT (0x8000|DMAOR_DME)
#define SH_DMAC_BASE0 0xffa00000
#define SH_DMAC_BASE1 0xffa00070
/* Definitions for the SuperH DMAC */
@ -27,40 +25,8 @@
#define TS_32 0x00000030
#define TS_64 0x00000000
#define CHCR_TS_LOW_MASK 0x70
#define CHCR_TS_LOW_SHIFT 4
#define CHCR_TS_HIGH_MASK 0
#define CHCR_TS_HIGH_SHIFT 0
#define DMAOR_COD 0x00000008
/*
* The SuperH DMAC supports a number of transmit sizes, we list them here,
* with their respective values as they appear in the CHCR registers.
*
* Defaults to a 64-bit transfer size.
*/
enum {
XMIT_SZ_8BIT = 1,
XMIT_SZ_16BIT = 2,
XMIT_SZ_32BIT = 3,
XMIT_SZ_64BIT = 0,
XMIT_SZ_256BIT = 4,
};
/*
* The DMA count is defined as the number of bytes to transfer.
*/
#define TS_SHIFT { \
[XMIT_SZ_8BIT] = 0, \
[XMIT_SZ_16BIT] = 1, \
[XMIT_SZ_32BIT] = 2, \
[XMIT_SZ_64BIT] = 3, \
[XMIT_SZ_256BIT] = 5, \
}
#define TS_INDEX2VAL(i) (((i) & 7) << CHCR_TS_LOW_SHIFT)
#endif
#endif /* __ASM_CPU_SH4_DMA_H */

1
arch/sh/include/mach-migor/mach/migor.h
View File

@ -1,6 +1,7 @@
#ifndef __ASM_SH_MIGOR_H
#define __ASM_SH_MIGOR_H
#define PORT_MSELCRA 0xa4050180
#define PORT_MSELCRB 0xa4050182
#define BSC_CS4BCR 0xfec10010
#define BSC_CS6ABCR 0xfec1001c

190
arch/sh/kernel/cpu/sh4a/setup-sh7722.c
View File

@ -7,19 +7,167 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/serial_sci.h>
#include <linux/mm.h>
#include <linux/sh_timer.h>
#include <linux/uio_driver.h>
#include <linux/usb/m66592.h>
#include <linux/sh_timer.h>
#include <asm/clock.h>
#include <asm/dmaengine.h>
#include <asm/mmzone.h>
#include <asm/dma-sh.h>
#include <asm/siu.h>
#include <cpu/dma-register.h>
#include <cpu/sh7722.h>
static struct sh_dmae_slave_config sh7722_dmae_slaves[] = {
{
.slave_id = SHDMA_SLAVE_SCIF0_TX,
.addr = 0xffe0000c,
.chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
.mid_rid = 0x21,
}, {
.slave_id = SHDMA_SLAVE_SCIF0_RX,
.addr = 0xffe00014,
.chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
.mid_rid = 0x22,
}, {
.slave_id = SHDMA_SLAVE_SCIF1_TX,
.addr = 0xffe1000c,
.chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
.mid_rid = 0x25,
}, {
.slave_id = SHDMA_SLAVE_SCIF1_RX,
.addr = 0xffe10014,
.chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
.mid_rid = 0x26,
}, {
.slave_id = SHDMA_SLAVE_SCIF2_TX,
.addr = 0xffe2000c,
.chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
.mid_rid = 0x29,
}, {
.slave_id = SHDMA_SLAVE_SCIF2_RX,
.addr = 0xffe20014,
.chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_8BIT),
.mid_rid = 0x2a,
}, {
.slave_id = SHDMA_SLAVE_SIUA_TX,
.addr = 0xa454c098,
.chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
.mid_rid = 0xb1,
}, {
.slave_id = SHDMA_SLAVE_SIUA_RX,
.addr = 0xa454c090,
.chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
.mid_rid = 0xb2,
}, {
.slave_id = SHDMA_SLAVE_SIUB_TX,
.addr = 0xa454c09c,
.chcr = DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
.mid_rid = 0xb5,
}, {
.slave_id = SHDMA_SLAVE_SIUB_RX,
.addr = 0xa454c094,
.chcr = DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL(XMIT_SZ_32BIT),
.mid_rid = 0xb6,
},
};
static struct sh_dmae_channel sh7722_dmae_channels[] = {
{
.offset = 0,
.dmars = 0,
.dmars_bit = 0,
}, {
.offset = 0x10,
.dmars = 0,
.dmars_bit = 8,
}, {
.offset = 0x20,
.dmars = 4,
.dmars_bit = 0,
}, {
.offset = 0x30,
.dmars = 4,
.dmars_bit = 8,
}, {
.offset = 0x50,
.dmars = 8,
.dmars_bit = 0,
}, {
.offset = 0x60,
.dmars = 8,
.dmars_bit = 8,
}
};
static unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma_platform_data = {
.slave = sh7722_dmae_slaves,
.slave_num = ARRAY_SIZE(sh7722_dmae_slaves),
.channel = sh7722_dmae_channels,
.channel_num = ARRAY_SIZE(sh7722_dmae_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
static struct resource sh7722_dmae_resources[] = {
[0] = {
/* Channel registers and DMAOR */
.start = 0xfe008020,
.end = 0xfe00808f,
.flags = IORESOURCE_MEM,
},
[1] = {
/* DMARSx */
.start = 0xfe009000,
.end = 0xfe00900b,
.flags = IORESOURCE_MEM,
},
{
/* DMA error IRQ */
.start = 78,
.end = 78,
.flags = IORESOURCE_IRQ,
},
{
/* IRQ for channels 0-3 */
.start = 48,
.end = 51,
.flags = IORESOURCE_IRQ,
},
{
/* IRQ for channels 4-5 */
.start = 76,
.end = 77,
.flags = IORESOURCE_IRQ,
},
};
struct platform_device dma_device = {
.name = "sh-dma-engine",
.id = -1,
.resource = sh7722_dmae_resources,
.num_resources = ARRAY_SIZE(sh7722_dmae_resources),
.dev = {
.platform_data = &dma_platform_data,
},
.archdata = {
.hwblk_id = HWBLK_DMAC,
},
};
/* Serial */
static struct plat_sci_port scif0_platform_data = {
.mapbase = 0xffe00000,
@ -388,15 +536,36 @@ static struct platform_device tmu2_device = {
},
};
static struct sh_dmae_pdata dma_platform_data = {
.mode = 0,
static struct siu_platform siu_platform_data = {
.dma_dev = &dma_device.dev,
.dma_slave_tx_a = SHDMA_SLAVE_SIUA_TX,
.dma_slave_rx_a = SHDMA_SLAVE_SIUA_RX,
.dma_slave_tx_b = SHDMA_SLAVE_SIUB_TX,
.dma_slave_rx_b = SHDMA_SLAVE_SIUB_RX,
};
static struct platform_device dma_device = {
.name = "sh-dma-engine",
static struct resource siu_resources[] = {
[0] = {
.start = 0xa4540000,
.end = 0xa454c10f,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = 108,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device siu_device = {
.name = "sh_siu",
.id = -1,
.dev = {
.platform_data = &dma_platform_data,
.dev = {
.platform_data = &siu_platform_data,
},
.resource = siu_resources,
.num_resources = ARRAY_SIZE(siu_resources),
.archdata = {
.hwblk_id = HWBLK_SIU,
},
};
@ -414,6 +583,7 @@ static struct platform_device *sh7722_devices[] __initdata = {
&vpu_device,
&veu_device,
&jpu_device,
&siu_device,
&dma_device,
};

186
arch/sh/kernel/cpu/sh4a/setup-sh7724.c
View File

@ -21,22 +21,189 @@
#include <linux/sh_timer.h>
#include <linux/io.h>
#include <linux/notifier.h>
#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/dma-sh.h>
#include <asm/dmaengine.h>
#include <asm/mmzone.h>
#include <cpu/dma-register.h>
#include <cpu/sh7724.h>
/* DMA */
static struct sh_dmae_pdata dma_platform_data = {
.mode = SHDMA_DMAOR1,
static struct sh_dmae_channel sh7724_dmae0_channels[] = {
{
.offset = 0,
.dmars = 0,
.dmars_bit = 0,
}, {
.offset = 0x10,
.dmars = 0,
.dmars_bit = 8,
}, {
.offset = 0x20,
.dmars = 4,
.dmars_bit = 0,
}, {
.offset = 0x30,
.dmars = 4,
.dmars_bit = 8,
}, {
.offset = 0x50,
.dmars = 8,
.dmars_bit = 0,
}, {
.offset = 0x60,
.dmars = 8,
.dmars_bit = 8,
}
};
static struct platform_device dma_device = {
.name = "sh-dma-engine",
.id = -1,
.dev = {
.platform_data = &dma_platform_data,
static struct sh_dmae_channel sh7724_dmae1_channels[] = {
{
.offset = 0,
.dmars = 0,
.dmars_bit = 0,
}, {
.offset = 0x10,
.dmars = 0,
.dmars_bit = 8,
}, {
.offset = 0x20,
.dmars = 4,
.dmars_bit = 0,
}, {
.offset = 0x30,
.dmars = 4,
.dmars_bit = 8,
}, {
.offset = 0x50,
.dmars = 8,
.dmars_bit = 0,
}, {
.offset = 0x60,
.dmars = 8,
.dmars_bit = 8,
}
};
static unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma0_platform_data = {
.channel = sh7724_dmae0_channels,
.channel_num = ARRAY_SIZE(sh7724_dmae0_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
static struct sh_dmae_pdata dma1_platform_data = {
.channel = sh7724_dmae1_channels,
.channel_num = ARRAY_SIZE(sh7724_dmae1_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
/* Resource order important! */
static struct resource sh7724_dmae0_resources[] = {
{
/* Channel registers and DMAOR */
.start = 0xfe008020,
.end = 0xfe00808f,
.flags = IORESOURCE_MEM,
},
{
/* DMARSx */
.start = 0xfe009000,
.end = 0xfe00900b,
.flags = IORESOURCE_MEM,
},
{
/* DMA error IRQ */
.start = 78,
.end = 78,
.flags = IORESOURCE_IRQ,
},
{
/* IRQ for channels 0-3 */
.start = 48,
.end = 51,
.flags = IORESOURCE_IRQ,
},
{
/* IRQ for channels 4-5 */
.start = 76,
.end = 77,
.flags = IORESOURCE_IRQ,
},
};
/* Resource order important! */
static struct resource sh7724_dmae1_resources[] = {
{
/* Channel registers and DMAOR */
.start = 0xfdc08020,
.end = 0xfdc0808f,
.flags = IORESOURCE_MEM,
},
{
/* DMARSx */
.start = 0xfdc09000,
.end = 0xfdc0900b,
.flags = IORESOURCE_MEM,
},
{
/* DMA error IRQ */
.start = 74,
.end = 74,
.flags = IORESOURCE_IRQ,
},
{
/* IRQ for channels 0-3 */
.start = 40,
.end = 43,
.flags = IORESOURCE_IRQ,
},
{
/* IRQ for channels 4-5 */
.start = 72,
.end = 73,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device dma0_device = {
.name = "sh-dma-engine",
.id = 0,
.resource = sh7724_dmae0_resources,
.num_resources = ARRAY_SIZE(sh7724_dmae0_resources),
.dev = {
.platform_data = &dma0_platform_data,
},
.archdata = {
.hwblk_id = HWBLK_DMAC0,
},
};
static struct platform_device dma1_device = {
.name = "sh-dma-engine",
.id = 1,
.resource = sh7724_dmae1_resources,
.num_resources = ARRAY_SIZE(sh7724_dmae1_resources),
.dev = {
.platform_data = &dma1_platform_data,
},
.archdata = {
.hwblk_id = HWBLK_DMAC1,
},
};
@ -663,7 +830,8 @@ static struct platform_device *sh7724_devices[] __initdata = {
&tmu3_device,
&tmu4_device,
&tmu5_device,
&dma_device,
&dma0_device,
&dma1_device,
&rtc_device,
&iic0_device,
&iic1_device,

134
arch/sh/kernel/cpu/sh4a/setup-sh7780.c
View File

@ -13,7 +13,10 @@
#include <linux/io.h>
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <asm/dma-sh.h>
#include <asm/dmaengine.h>
#include <cpu/dma-register.h>
static struct plat_sci_port scif0_platform_data = {
.mapbase = 0xffe00000,
@ -247,15 +250,131 @@ static struct platform_device rtc_device = {
.resource = rtc_resources,
};
static struct sh_dmae_pdata dma_platform_data = {
.mode = (SHDMA_MIX_IRQ | SHDMA_DMAOR1),
/* DMA */
static struct sh_dmae_channel sh7780_dmae0_channels[] = {
{
.offset = 0,
.dmars = 0,
.dmars_bit = 0,
}, {
.offset = 0x10,
.dmars = 0,
.dmars_bit = 8,
}, {
.offset = 0x20,
.dmars = 4,
.dmars_bit = 0,
}, {
.offset = 0x30,
.dmars = 4,
.dmars_bit = 8,
}, {
.offset = 0x50,
.dmars = 8,
.dmars_bit = 0,
}, {
.offset = 0x60,
.dmars = 8,
.dmars_bit = 8,
}
};
static struct platform_device dma_device = {
static struct sh_dmae_channel sh7780_dmae1_channels[] = {
{
.offset = 0,
}, {
.offset = 0x10,
}, {
.offset = 0x20,
}, {
.offset = 0x30,
}, {
.offset = 0x50,
}, {
.offset = 0x60,
}
};
static unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma0_platform_data = {
.channel = sh7780_dmae0_channels,
.channel_num = ARRAY_SIZE(sh7780_dmae0_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
static struct sh_dmae_pdata dma1_platform_data = {
.channel = sh7780_dmae1_channels,
.channel_num = ARRAY_SIZE(sh7780_dmae1_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
static struct resource sh7780_dmae0_resources[] = {
[0] = {
/* Channel registers and DMAOR */
.start = 0xfc808020,
.end = 0xfc80808f,
.flags = IORESOURCE_MEM,
},
[1] = {
/* DMARSx */
.start = 0xfc809000,
.end = 0xfc80900b,
.flags = IORESOURCE_MEM,
},
{
/* Real DMA error IRQ is 38, and channel IRQs are 34-37, 44-45 */
.start = 34,
.end = 34,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
},
};
static struct resource sh7780_dmae1_resources[] = {
[0] = {
/* Channel registers and DMAOR */
.start = 0xfc818020,
.end = 0xfc81808f,
.flags = IORESOURCE_MEM,
},
/* DMAC1 has no DMARS */
{
/* Real DMA error IRQ is 38, and channel IRQs are 46-47, 92-95 */
.start = 46,
.end = 46,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
},
};
static struct platform_device dma0_device = {
.name = "sh-dma-engine",
.id = -1,
.id = 0,
.resource = sh7780_dmae0_resources,
.num_resources = ARRAY_SIZE(sh7780_dmae0_resources),
.dev = {
.platform_data = &dma_platform_data,
.platform_data = &dma0_platform_data,
},
};
static struct platform_device dma1_device = {
.name = "sh-dma-engine",
.id = 1,
.resource = sh7780_dmae1_resources,
.num_resources = ARRAY_SIZE(sh7780_dmae1_resources),
.dev = {
.platform_data = &dma1_platform_data,
},
};
@ -269,7 +388,8 @@ static struct platform_device *sh7780_devices[] __initdata = {
&tmu4_device,
&tmu5_device,
&rtc_device,
&dma_device,
&dma0_device,
&dma1_device,
};
static int __init sh7780_devices_setup(void)

134
arch/sh/kernel/cpu/sh4a/setup-sh7785.c
View File

@ -14,9 +14,12 @@
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/sh_timer.h>
#include <asm/dma-sh.h>
#include <asm/dmaengine.h>
#include <asm/mmzone.h>
#include <cpu/dma-register.h>
static struct plat_sci_port scif0_platform_data = {
.mapbase = 0xffea0000,
.flags = UPF_BOOT_AUTOCONF,
@ -295,15 +298,131 @@ static struct platform_device tmu5_device = {
.num_resources = ARRAY_SIZE(tmu5_resources),
};
static struct sh_dmae_pdata dma_platform_data = {
.mode = (SHDMA_MIX_IRQ | SHDMA_DMAOR1),
/* DMA */
static struct sh_dmae_channel sh7785_dmae0_channels[] = {
{
.offset = 0,
.dmars = 0,
.dmars_bit = 0,
}, {
.offset = 0x10,
.dmars = 0,
.dmars_bit = 8,
}, {
.offset = 0x20,
.dmars = 4,
.dmars_bit = 0,
}, {
.offset = 0x30,
.dmars = 4,
.dmars_bit = 8,
}, {
.offset = 0x50,
.dmars = 8,
.dmars_bit = 0,
}, {
.offset = 0x60,
.dmars = 8,
.dmars_bit = 8,
}
};
static struct platform_device dma_device = {
static struct sh_dmae_channel sh7785_dmae1_channels[] = {
{
.offset = 0,
}, {
.offset = 0x10,
}, {
.offset = 0x20,
}, {
.offset = 0x30,
}, {
.offset = 0x50,
}, {
.offset = 0x60,
}
};
static unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma0_platform_data = {
.channel = sh7785_dmae0_channels,
.channel_num = ARRAY_SIZE(sh7785_dmae0_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
static struct sh_dmae_pdata dma1_platform_data = {
.channel = sh7785_dmae1_channels,
.channel_num = ARRAY_SIZE(sh7785_dmae1_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
.ts_high_mask = CHCR_TS_HIGH_MASK,
.ts_shift = ts_shift,
.ts_shift_num = ARRAY_SIZE(ts_shift),
.dmaor_init = DMAOR_INIT,
};
static struct resource sh7785_dmae0_resources[] = {
[0] = {
/* Channel registers and DMAOR */
.start = 0xfc808020,
.end = 0xfc80808f,
.flags = IORESOURCE_MEM,
},
[1] = {
/* DMARSx */
.start = 0xfc809000,
.end = 0xfc80900b,
.flags = IORESOURCE_MEM,
},
{
/* Real DMA error IRQ is 39, and channel IRQs are 33-38 */
.start = 33,
.end = 33,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
},
};
static struct resource sh7785_dmae1_resources[] = {
[0] = {
/* Channel registers and DMAOR */
.start = 0xfcc08020,
.end = 0xfcc0808f,
.flags = IORESOURCE_MEM,
},
/* DMAC1 has no DMARS */
{
/* Real DMA error IRQ is 58, and channel IRQs are 52-57 */
.start = 52,
.end = 52,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
},
};
static struct platform_device dma0_device = {
.name = "sh-dma-engine",
.id = -1,
.id = 0,
.resource = sh7785_dmae0_resources,
.num_resources = ARRAY_SIZE(sh7785_dmae0_resources),
.dev = {
.platform_data = &dma_platform_data,
.platform_data = &dma0_platform_data,
},
};
static struct platform_device dma1_device = {
.name = "sh-dma-engine",
.id = 1,
.resource = sh7785_dmae1_resources,
.num_resources = ARRAY_SIZE(sh7785_dmae1_resources),
.dev = {
.platform_data = &dma1_platform_data,
},
};
@ -320,7 +439,8 @@ static struct platform_device *sh7785_devices[] __initdata = {
&tmu3_device,
&tmu4_device,
&tmu5_device,
&dma_device,
&dma0_device,
&dma1_device,
};
static int __init sh7785_devices_setup(void)

30
arch/sh/kernel/hw_breakpoint.c
View File

@ -143,26 +143,6 @@ static int arch_check_va_in_kernelspace(unsigned long va, u8 hbp_len)
return (va >= TASK_SIZE) && ((va + len - 1) >= TASK_SIZE);
}
/*
* Store a breakpoint's encoded address, length, and type.
*/
static int arch_store_info(struct perf_event *bp)
{
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
/*
* User-space requests will always have the address field populated
* For kernel-addresses, either the address or symbol name can be
* specified.
*/
if (info->name)
info->address = (unsigned long)kallsyms_lookup_name(info->name);
if (info->address)
return 0;
return -EINVAL;
}
int arch_bp_generic_fields(int sh_len, int sh_type,
int *gen_len, int *gen_type)
{
@ -276,10 +256,12 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp,
return ret;
}
ret = arch_store_info(bp);
if (ret < 0)
return ret;
/*
* For kernel-addresses, either the address or symbol name can be
* specified.
*/
if (info->name)
info->address = (unsigned long)kallsyms_lookup_name(info->name);
/*
* Check that the low-order bits of the address are appropriate

3
arch/sh/kernel/setup.c
View File

@ -443,7 +443,7 @@ void __init setup_arch(char **cmdline_p)
nodes_clear(node_online_map);
/* Setup bootmem with available RAM */
pmb_init();
lmb_init();
setup_memory();
sparse_init();
@ -452,7 +452,6 @@ void __init setup_arch(char **cmdline_p)
conswitchp = &dummy_con;
#endif
paging_init();
pmb_init();
ioremap_fixed_init();

6
arch/sh/kernel/time.c
View File

@ -39,12 +39,12 @@ static int null_rtc_set_time(const time_t secs)
void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
#ifdef CONFIG_GENERIC_CMOS_UPDATE
void read_persistent_clock(struct timespec *ts)
{
rtc_sh_get_time(ts);
}
#ifdef CONFIG_GENERIC_CMOS_UPDATE
int update_persistent_clock(struct timespec now)
{
return rtc_sh_set_time(now.tv_sec);
@ -113,9 +113,5 @@ void __init time_init(void)
hwblk_init();
clk_init();
rtc_sh_get_time(&xtime);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
late_time_init = sh_late_time_init;
}

3
arch/sh/lib/libgcc.h
View File

@ -17,8 +17,7 @@ struct DWstruct {
#error I feel sick.
#endif
typedef union
{
typedef union {
struct DWstruct s;
long long ll;
} DWunion;

70
arch/sh/mm/ioremap.c
View File

@ -34,17 +34,32 @@
* caller shouldn't need to know that small detail.
*/
void __iomem * __init_refok
__ioremap_caller(unsigned long phys_addr, unsigned long size,
__ioremap_caller(phys_addr_t phys_addr, unsigned long size,
pgprot_t pgprot, void *caller)
{
struct vm_struct *area;
unsigned long offset, last_addr, addr, orig_addr;
void __iomem *mapped;
/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
if (!size || last_addr < phys_addr)
return NULL;
/*
* If we can't yet use the regular approach, go the fixmap route.
*/
if (!mem_init_done)
return ioremap_fixed(phys_addr, size, pgprot);
/*
* First try to remap through the PMB.
* PMB entries are all pre-faulted.
*/
mapped = pmb_remap_caller(phys_addr, size, pgprot, caller);
if (mapped && !IS_ERR(mapped))
return mapped;
/*
* Mappings have to be page-aligned
*/
@ -52,12 +67,6 @@ __ioremap_caller(unsigned long phys_addr, unsigned long size,
phys_addr &= PAGE_MASK;
size = PAGE_ALIGN(last_addr+1) - phys_addr;
/*
* If we can't yet use the regular approach, go the fixmap route.
*/
if (!mem_init_done)
return ioremap_fixed(phys_addr, offset, size, pgprot);
/*
* Ok, go for it..
*/
@ -67,33 +76,10 @@ __ioremap_caller(unsigned long phys_addr, unsigned long size,
area->phys_addr = phys_addr;
orig_addr = addr = (unsigned long)area->addr;
#ifdef CONFIG_PMB
/*
* First try to remap through the PMB once a valid VMA has been
* established. Smaller allocations (or the rest of the size
* remaining after a PMB mapping due to the size not being
* perfectly aligned on a PMB size boundary) are then mapped
* through the UTLB using conventional page tables.
*
* PMB entries are all pre-faulted.
*/
if (unlikely(phys_addr >= P1SEG)) {
unsigned long mapped;
mapped = pmb_remap(addr, phys_addr, size, pgprot);
if (likely(mapped)) {
addr += mapped;
phys_addr += mapped;
size -= mapped;
}
if (ioremap_page_range(addr, addr + size, phys_addr, pgprot)) {
vunmap((void *)orig_addr);
return NULL;
}
#endif
if (likely(size))
if (ioremap_page_range(addr, addr + size, phys_addr, pgprot)) {
vunmap((void *)orig_addr);
return NULL;
}
return (void __iomem *)(offset + (char *)orig_addr);
}
@ -133,23 +119,11 @@ void __iounmap(void __iomem *addr)
if (iounmap_fixed(addr) == 0)
return;
#ifdef CONFIG_PMB
/*
* Purge any PMB entries that may have been established for this
* mapping, then proceed with conventional VMA teardown.
*
* XXX: Note that due to the way that remove_vm_area() does
* matching of the resultant VMA, we aren't able to fast-forward
* the address past the PMB space until the end of the VMA where
* the page tables reside. As such, unmap_vm_area() will be
* forced to linearly scan over the area until it finds the page
* tables where PTEs that need to be unmapped actually reside,
* which is far from optimal. Perhaps we need to use a separate
* VMA for the PMB mappings?
* -- PFM.
* If the PMB handled it, there's nothing else to do.
*/
pmb_unmap(vaddr);
#endif
if (pmb_unmap(addr) == 0)
return;
p = remove_vm_area((void *)(vaddr & PAGE_MASK));
if (!p) {

11
arch/sh/mm/ioremap_fixed.c
View File

@ -45,14 +45,21 @@ void __init ioremap_fixed_init(void)
}
void __init __iomem *
ioremap_fixed(resource_size_t phys_addr, unsigned long offset,
unsigned long size, pgprot_t prot)
ioremap_fixed(phys_addr_t phys_addr, unsigned long size, pgprot_t prot)
{
enum fixed_addresses idx0, idx;
struct ioremap_map *map;
unsigned int nrpages;
unsigned long offset;
int i, slot;
/*
* Mappings have to be page-aligned
*/
offset = phys_addr & ~PAGE_MASK;
phys_addr &= PAGE_MASK;
size = PAGE_ALIGN(phys_addr + size) - phys_addr;
slot = -1;
for (i = 0; i < FIX_N_IOREMAPS; i++) {
map = &ioremap_maps[i];

3
arch/sh/mm/numa.c
View File

@ -74,6 +74,9 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;
pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
PAGE_KERNEL);
lmb_add(start, end - start);
__add_active_range(nid, start_pfn, end_pfn);

434
arch/sh/mm/pmb.c
View File

@ -23,7 +23,8 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/rwlock.h>
#include <linux/vmalloc.h>
#include <asm/cacheflush.h>
#include <asm/sizes.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@ -52,12 +53,24 @@ struct pmb_entry {
struct pmb_entry *link;
};
static struct {
unsigned long size;
int flag;
} pmb_sizes[] = {
{ .size = SZ_512M, .flag = PMB_SZ_512M, },
{ .size = SZ_128M, .flag = PMB_SZ_128M, },
{ .size = SZ_64M, .flag = PMB_SZ_64M, },
{ .size = SZ_16M, .flag = PMB_SZ_16M, },
};
static void pmb_unmap_entry(struct pmb_entry *, int depth);
static DEFINE_RWLOCK(pmb_rwlock);
static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES];
static DECLARE_BITMAP(pmb_map, NR_PMB_ENTRIES);
static unsigned int pmb_iomapping_enabled;
static __always_inline unsigned long mk_pmb_entry(unsigned int entry)
{
return (entry & PMB_E_MASK) << PMB_E_SHIFT;
@ -73,6 +86,142 @@ static __always_inline unsigned long mk_pmb_data(unsigned int entry)
return mk_pmb_entry(entry) | PMB_DATA;
}
static __always_inline unsigned int pmb_ppn_in_range(unsigned long ppn)
{
return ppn >= __pa(memory_start) && ppn < __pa(memory_end);
}
/*
* Ensure that the PMB entries match our cache configuration.
*
* When we are in 32-bit address extended mode, CCR.CB becomes
* invalid, so care must be taken to manually adjust cacheable
* translations.
*/
static __always_inline unsigned long pmb_cache_flags(void)
{
unsigned long flags = 0;
#if defined(CONFIG_CACHE_OFF)
flags |= PMB_WT | PMB_UB;
#elif defined(CONFIG_CACHE_WRITETHROUGH)
flags |= PMB_C | PMB_WT | PMB_UB;
#elif defined(CONFIG_CACHE_WRITEBACK)
flags |= PMB_C;
#endif
return flags;
}
/*
* Convert typical pgprot value to the PMB equivalent
*/
static inline unsigned long pgprot_to_pmb_flags(pgprot_t prot)
{
unsigned long pmb_flags = 0;
u64 flags = pgprot_val(prot);
if (flags & _PAGE_CACHABLE)
pmb_flags |= PMB_C;
if (flags & _PAGE_WT)
pmb_flags |= PMB_WT | PMB_UB;
return pmb_flags;
}
static inline bool pmb_can_merge(struct pmb_entry *a, struct pmb_entry *b)
{
return (b->vpn == (a->vpn + a->size)) &&
(b->ppn == (a->ppn + a->size)) &&
(b->flags == a->flags);
}
static bool pmb_mapping_exists(unsigned long vaddr, phys_addr_t phys,
unsigned long size)
{
int i;
read_lock(&pmb_rwlock);
for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
struct pmb_entry *pmbe, *iter;
unsigned long span;
if (!test_bit(i, pmb_map))
continue;
pmbe = &pmb_entry_list[i];
/*
* See if VPN and PPN are bounded by an existing mapping.
*/
if ((vaddr < pmbe->vpn) || (vaddr >= (pmbe->vpn + pmbe->size)))
continue;
if ((phys < pmbe->ppn) || (phys >= (pmbe->ppn + pmbe->size)))
continue;
/*
* Now see if we're in range of a simple mapping.
*/
if (size <= pmbe->size) {
read_unlock(&pmb_rwlock);
return true;
}
span = pmbe->size;
/*
* Finally for sizes that involve compound mappings, walk
* the chain.
*/
for (iter = pmbe->link; iter; iter = iter->link)
span += iter->size;
/*
* Nothing else to do if the range requirements are met.
*/
if (size <= span) {
read_unlock(&pmb_rwlock);
return true;
}
}
read_unlock(&pmb_rwlock);
return false;
}
static bool pmb_size_valid(unsigned long size)
{
int i;
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
if (pmb_sizes[i].size == size)
return true;
return false;
}
static inline bool pmb_addr_valid(unsigned long addr, unsigned long size)
{
return (addr >= P1SEG && (addr + size - 1) < P3SEG);
}
static inline bool pmb_prot_valid(pgprot_t prot)
{
return (pgprot_val(prot) & _PAGE_USER) == 0;
}
static int pmb_size_to_flags(unsigned long size)
{
int i;
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
if (pmb_sizes[i].size == size)
return pmb_sizes[i].flag;
return 0;
}
static int pmb_alloc_entry(void)
{
int pos;
@ -139,34 +288,23 @@ static void pmb_free(struct pmb_entry *pmbe)
pmbe->link = NULL;
}
/*
* Ensure that the PMB entries match our cache configuration.
*
* When we are in 32-bit address extended mode, CCR.CB becomes
* invalid, so care must be taken to manually adjust cacheable
* translations.
*/
static __always_inline unsigned long pmb_cache_flags(void)
{
unsigned long flags = 0;
#if defined(CONFIG_CACHE_WRITETHROUGH)
flags |= PMB_C | PMB_WT | PMB_UB;
#elif defined(CONFIG_CACHE_WRITEBACK)
flags |= PMB_C;
#endif
return flags;
}
/*
* Must be run uncached.
*/
static void __set_pmb_entry(struct pmb_entry *pmbe)
{
writel_uncached(pmbe->vpn | PMB_V, mk_pmb_addr(pmbe->entry));
writel_uncached(pmbe->ppn | pmbe->flags | PMB_V,
mk_pmb_data(pmbe->entry));
unsigned long addr, data;
addr = mk_pmb_addr(pmbe->entry);
data = mk_pmb_data(pmbe->entry);
jump_to_uncached();
/* Set V-bit */
__raw_writel(pmbe->vpn | PMB_V, addr);
__raw_writel(pmbe->ppn | pmbe->flags | PMB_V, data);
back_to_cached();
}
static void __clear_pmb_entry(struct pmb_entry *pmbe)
@ -194,144 +332,155 @@ static void set_pmb_entry(struct pmb_entry *pmbe)
spin_unlock_irqrestore(&pmbe->lock, flags);
}
static struct {
unsigned long size;
int flag;
} pmb_sizes[] = {
{ .size = SZ_512M, .flag = PMB_SZ_512M, },
{ .size = SZ_128M, .flag = PMB_SZ_128M, },
{ .size = SZ_64M, .flag = PMB_SZ_64M, },
{ .size = SZ_16M, .flag = PMB_SZ_16M, },
};
long pmb_remap(unsigned long vaddr, unsigned long phys,
unsigned long size, pgprot_t prot)
int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
unsigned long size, pgprot_t prot)
{
struct pmb_entry *pmbp, *pmbe;
unsigned long wanted;
int pmb_flags, i;
long err;
u64 flags;
unsigned long orig_addr, orig_size;
unsigned long flags, pmb_flags;
int i, mapped;
flags = pgprot_val(prot);
if (!pmb_addr_valid(vaddr, size))
return -EFAULT;
if (pmb_mapping_exists(vaddr, phys, size))
return 0;
pmb_flags = PMB_WT | PMB_UB;
orig_addr = vaddr;
orig_size = size;
/* Convert typical pgprot value to the PMB equivalent */
if (flags & _PAGE_CACHABLE) {
pmb_flags |= PMB_C;
if ((flags & _PAGE_WT) == 0)
pmb_flags &= ~(PMB_WT | PMB_UB);
}
flush_tlb_kernel_range(vaddr, vaddr + size);
pmb_flags = pgprot_to_pmb_flags(prot);
pmbp = NULL;
wanted = size;
again:
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++) {
unsigned long flags;
do {
for (i = mapped = 0; i < ARRAY_SIZE(pmb_sizes); i++) {
if (size < pmb_sizes[i].size)
continue;
if (size < pmb_sizes[i].size)
continue;
pmbe = pmb_alloc(vaddr, phys, pmb_flags |
pmb_sizes[i].flag, PMB_NO_ENTRY);
if (IS_ERR(pmbe)) {
pmb_unmap_entry(pmbp, mapped);
return PTR_ERR(pmbe);
}
pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag,
PMB_NO_ENTRY);
if (IS_ERR(pmbe)) {
err = PTR_ERR(pmbe);
goto out;
spin_lock_irqsave(&pmbe->lock, flags);
pmbe->size = pmb_sizes[i].size;
__set_pmb_entry(pmbe);
phys += pmbe->size;
vaddr += pmbe->size;
size -= pmbe->size;
/*
* Link adjacent entries that span multiple PMB
* entries for easier tear-down.
*/
if (likely(pmbp)) {
spin_lock(&pmbp->lock);
pmbp->link = pmbe;
spin_unlock(&pmbp->lock);
}
pmbp = pmbe;
/*
* Instead of trying smaller sizes on every
* iteration (even if we succeed in allocating
* space), try using pmb_sizes[i].size again.
*/
i--;
mapped++;
spin_unlock_irqrestore(&pmbe->lock, flags);
}
} while (size >= SZ_16M);
spin_lock_irqsave(&pmbe->lock, flags);
flush_cache_vmap(orig_addr, orig_addr + orig_size);
__set_pmb_entry(pmbe);
phys += pmb_sizes[i].size;
vaddr += pmb_sizes[i].size;
size -= pmb_sizes[i].size;
pmbe->size = pmb_sizes[i].size;
/*
* Link adjacent entries that span multiple PMB entries
* for easier tear-down.
*/
if (likely(pmbp)) {
spin_lock(&pmbp->lock);
pmbp->link = pmbe;
spin_unlock(&pmbp->lock);
}
pmbp = pmbe;
/*
* Instead of trying smaller sizes on every iteration
* (even if we succeed in allocating space), try using
* pmb_sizes[i].size again.
*/
i--;
spin_unlock_irqrestore(&pmbe->lock, flags);
}
if (size >= SZ_16M)
goto again;
return wanted - size;
out:
pmb_unmap_entry(pmbp, NR_PMB_ENTRIES);
return err;
return 0;
}
void pmb_unmap(unsigned long addr)
void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
pgprot_t prot, void *caller)
{
unsigned long vaddr;
phys_addr_t offset, last_addr;
phys_addr_t align_mask;
unsigned long aligned;
struct vm_struct *area;
int i, ret;
if (!pmb_iomapping_enabled)
return NULL;
/*
* Small mappings need to go through the TLB.
*/
if (size < SZ_16M)
return ERR_PTR(-EINVAL);
if (!pmb_prot_valid(prot))
return ERR_PTR(-EINVAL);
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
if (size >= pmb_sizes[i].size)
break;
last_addr = phys + size;
align_mask = ~(pmb_sizes[i].size - 1);
offset = phys & ~align_mask;
phys &= align_mask;
aligned = ALIGN(last_addr, pmb_sizes[i].size) - phys;
/*
* XXX: This should really start from uncached_end, but this
* causes the MMU to reset, so for now we restrict it to the
* 0xb000...0xc000 range.
*/
area = __get_vm_area_caller(aligned, VM_IOREMAP, 0xb0000000,
P3SEG, caller);
if (!area)
return NULL;
area->phys_addr = phys;
vaddr = (unsigned long)area->addr;
ret = pmb_bolt_mapping(vaddr, phys, size, prot);
if (unlikely(ret != 0))
return ERR_PTR(ret);
return (void __iomem *)(offset + (char *)vaddr);
}
int pmb_unmap(void __iomem *addr)
{
struct pmb_entry *pmbe = NULL;
int i;
unsigned long vaddr = (unsigned long __force)addr;
int i, found = 0;
read_lock(&pmb_rwlock);
for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
if (test_bit(i, pmb_map)) {
pmbe = &pmb_entry_list[i];
if (pmbe->vpn == addr)
if (pmbe->vpn == vaddr) {
found = 1;
break;
}
}
}
read_unlock(&pmb_rwlock);
pmb_unmap_entry(pmbe, NR_PMB_ENTRIES);
}
if (found) {
pmb_unmap_entry(pmbe, NR_PMB_ENTRIES);
return 0;
}
static bool pmb_can_merge(struct pmb_entry *a, struct pmb_entry *b)
{
return (b->vpn == (a->vpn + a->size)) &&
(b->ppn == (a->ppn + a->size)) &&
(b->flags == a->flags);
}
static bool pmb_size_valid(unsigned long size)
{
int i;
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
if (pmb_sizes[i].size == size)
return true;
return false;
}
static int pmb_size_to_flags(unsigned long size)
{
int i;
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
if (pmb_sizes[i].size == size)
return pmb_sizes[i].flag;
return 0;
return -EINVAL;
}
static void __pmb_unmap_entry(struct pmb_entry *pmbe, int depth)
@ -351,6 +500,8 @@ static void __pmb_unmap_entry(struct pmb_entry *pmbe, int depth)
*/
__clear_pmb_entry(pmbe);
flush_cache_vunmap(pmbe->vpn, pmbe->vpn + pmbe->size);
pmbe = pmblink->link;
pmb_free(pmblink);
@ -369,11 +520,6 @@ static void pmb_unmap_entry(struct pmb_entry *pmbe, int depth)
write_unlock_irqrestore(&pmb_rwlock, flags);
}
static __always_inline unsigned int pmb_ppn_in_range(unsigned long ppn)
{
return ppn >= __pa(memory_start) && ppn < __pa(memory_end);
}
static void __init pmb_notify(void)
{
int i;
@ -625,6 +771,18 @@ static void __init pmb_resize(void)
}
#endif
static int __init early_pmb(char *p)
{
if (!p)
return 0;
if (strstr(p, "iomap"))
pmb_iomapping_enabled = 1;
return 0;
}
early_param("pmb", early_pmb);
void __init pmb_init(void)
{
/* Synchronize software state */
@ -713,7 +871,7 @@ static int __init pmb_debugfs_init(void)
return 0;
}
postcore_initcall(pmb_debugfs_init);
subsys_initcall(pmb_debugfs_init);
#ifdef CONFIG_PM
static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state)

502
drivers/dma/shdma.c
View File

@ -24,8 +24,10 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <cpu/dma.h>
#include <asm/dma-sh.h>
#include <linux/pm_runtime.h>
#include <asm/dmaengine.h>
#include "shdma.h"
/* DMA descriptor control */
@ -38,30 +40,32 @@ enum sh_dmae_desc_status {
};
#define NR_DESCS_PER_CHANNEL 32
/*
* Define the default configuration for dual address memory-memory transfer.
* The 0x400 value represents auto-request, external->external.
*
* And this driver set 4byte burst mode.
* If you want to change mode, you need to change RS_DEFAULT of value.
* (ex 1byte burst mode -> (RS_DUAL & ~TS_32)
*/
#define RS_DEFAULT (RS_DUAL)
/* Default MEMCPY transfer size = 2^2 = 4 bytes */
#define LOG2_DEFAULT_XFER_SIZE 2
/* A bitmask with bits enough for enum sh_dmae_slave_chan_id */
static unsigned long sh_dmae_slave_used[BITS_TO_LONGS(SHDMA_SLAVE_NUMBER)];
static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all);
#define SH_DMAC_CHAN_BASE(id) (dma_base_addr[id])
static void sh_dmae_writel(struct sh_dmae_chan *sh_dc, u32 data, u32 reg)
{
ctrl_outl(data, SH_DMAC_CHAN_BASE(sh_dc->id) + reg);
__raw_writel(data, sh_dc->base + reg / sizeof(u32));
}
static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
{
return ctrl_inl(SH_DMAC_CHAN_BASE(sh_dc->id) + reg);
return __raw_readl(sh_dc->base + reg / sizeof(u32));
}
static u16 dmaor_read(struct sh_dmae_device *shdev)
{
return __raw_readw(shdev->chan_reg + DMAOR / sizeof(u32));
}
static void dmaor_write(struct sh_dmae_device *shdev, u16 data)
{
__raw_writew(data, shdev->chan_reg + DMAOR / sizeof(u32));
}
/*
@ -69,24 +73,23 @@ static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
*
* SH7780 has two DMAOR register
*/
static void sh_dmae_ctl_stop(int id)
static void sh_dmae_ctl_stop(struct sh_dmae_device *shdev)
{
unsigned short dmaor = dmaor_read_reg(id);
unsigned short dmaor = dmaor_read(shdev);
dmaor &= ~(DMAOR_NMIF | DMAOR_AE);
dmaor_write_reg(id, dmaor);
dmaor_write(shdev, dmaor & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME));
}
static int sh_dmae_rst(int id)
static int sh_dmae_rst(struct sh_dmae_device *shdev)
{
unsigned short dmaor;
sh_dmae_ctl_stop(id);
dmaor = dmaor_read_reg(id) | DMAOR_INIT;
sh_dmae_ctl_stop(shdev);
dmaor = dmaor_read(shdev) | shdev->pdata->dmaor_init;
dmaor_write_reg(id, dmaor);
if (dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF)) {
pr_warning(KERN_ERR "dma-sh: Can't initialize DMAOR.\n");
dmaor_write(shdev, dmaor);
if (dmaor_read(shdev) & (DMAOR_AE | DMAOR_NMIF)) {
pr_warning("dma-sh: Can't initialize DMAOR.\n");
return -EINVAL;
}
return 0;
@ -102,13 +105,36 @@ static bool dmae_is_busy(struct sh_dmae_chan *sh_chan)
return false; /* waiting */
}
static unsigned int ts_shift[] = TS_SHIFT;
static inline unsigned int calc_xmit_shift(u32 chcr)
static unsigned int calc_xmit_shift(struct sh_dmae_chan *sh_chan, u32 chcr)
{
int cnt = ((chcr & CHCR_TS_LOW_MASK) >> CHCR_TS_LOW_SHIFT) |
((chcr & CHCR_TS_HIGH_MASK) >> CHCR_TS_HIGH_SHIFT);
struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
struct sh_dmae_device, common);
struct sh_dmae_pdata *pdata = shdev->pdata;
int cnt = ((chcr & pdata->ts_low_mask) >> pdata->ts_low_shift) |
((chcr & pdata->ts_high_mask) >> pdata->ts_high_shift);
return ts_shift[cnt];
if (cnt >= pdata->ts_shift_num)
cnt = 0;
return pdata->ts_shift[cnt];
}
static u32 log2size_to_chcr(struct sh_dmae_chan *sh_chan, int l2size)
{
struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
struct sh_dmae_device, common);
struct sh_dmae_pdata *pdata = shdev->pdata;
int i;
for (i = 0; i < pdata->ts_shift_num; i++)
if (pdata->ts_shift[i] == l2size)
break;
if (i == pdata->ts_shift_num)
i = 0;
return ((i << pdata->ts_low_shift) & pdata->ts_low_mask) |
((i << pdata->ts_high_shift) & pdata->ts_high_mask);
}
static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs *hw)
@ -136,8 +162,13 @@ static void dmae_halt(struct sh_dmae_chan *sh_chan)
static void dmae_init(struct sh_dmae_chan *sh_chan)
{
u32 chcr = RS_DEFAULT; /* default is DUAL mode */
sh_chan->xmit_shift = calc_xmit_shift(chcr);
/*
* Default configuration for dual address memory-memory transfer.
* 0x400 represents auto-request.
*/
u32 chcr = DM_INC | SM_INC | 0x400 | log2size_to_chcr(sh_chan,
LOG2_DEFAULT_XFER_SIZE);
sh_chan->xmit_shift = calc_xmit_shift(sh_chan, chcr);
sh_dmae_writel(sh_chan, chcr, CHCR);
}
@ -147,37 +178,26 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
if (dmae_is_busy(sh_chan))
return -EBUSY;
sh_chan->xmit_shift = calc_xmit_shift(val);
sh_chan->xmit_shift = calc_xmit_shift(sh_chan, val);
sh_dmae_writel(sh_chan, val, CHCR);
return 0;
}
#define DMARS_SHIFT 8
#define DMARS_CHAN_MSK 0x01
static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
{
u32 addr;
int shift = 0;
struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
struct sh_dmae_device, common);
struct sh_dmae_pdata *pdata = shdev->pdata;
struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->id];
u16 __iomem *addr = shdev->dmars + chan_pdata->dmars / sizeof(u16);
int shift = chan_pdata->dmars_bit;
if (dmae_is_busy(sh_chan))
return -EBUSY;
if (sh_chan->id & DMARS_CHAN_MSK)
shift = DMARS_SHIFT;
if (sh_chan->id < 6)
/* DMA0RS0 - DMA0RS2 */
addr = SH_DMARS_BASE0 + (sh_chan->id / 2) * 4;
#ifdef SH_DMARS_BASE1
else if (sh_chan->id < 12)
/* DMA1RS0 - DMA1RS2 */
addr = SH_DMARS_BASE1 + ((sh_chan->id - 6) / 2) * 4;
#endif
else
return -EINVAL;
ctrl_outw((val << shift) | (ctrl_inw(addr) & (0xFF00 >> shift)), addr);
__raw_writew((__raw_readw(addr) & (0xff00 >> shift)) | (val << shift),
addr);
return 0;
}
@ -251,15 +271,15 @@ static struct sh_dmae_slave_config *sh_dmae_find_slave(
struct dma_device *dma_dev = sh_chan->common.device;
struct sh_dmae_device *shdev = container_of(dma_dev,
struct sh_dmae_device, common);
struct sh_dmae_pdata *pdata = &shdev->pdata;
struct sh_dmae_pdata *pdata = shdev->pdata;
int i;
if ((unsigned)slave_id >= SHDMA_SLAVE_NUMBER)
return NULL;
for (i = 0; i < pdata->config_num; i++)
if (pdata->config[i].slave_id == slave_id)
return pdata->config + i;
for (i = 0; i < pdata->slave_num; i++)
if (pdata->slave[i].slave_id == slave_id)
return pdata->slave + i;
return NULL;
}
@ -270,6 +290,8 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
struct sh_desc *desc;
struct sh_dmae_slave *param = chan->private;
pm_runtime_get_sync(sh_chan->dev);
/*
* This relies on the guarantee from dmaengine that alloc_chan_resources
* never runs concurrently with itself or free_chan_resources.
@ -288,9 +310,8 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
dmae_set_dmars(sh_chan, cfg->mid_rid);
dmae_set_chcr(sh_chan, cfg->chcr);
} else {
if ((sh_dmae_readl(sh_chan, CHCR) & 0x700) != 0x400)
dmae_set_chcr(sh_chan, RS_DEFAULT);
} else if ((sh_dmae_readl(sh_chan, CHCR) & 0xf00) != 0x400) {
dmae_init(sh_chan);
}
spin_lock_bh(&sh_chan->desc_lock);
@ -312,6 +333,9 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
}
spin_unlock_bh(&sh_chan->desc_lock);
if (!sh_chan->descs_allocated)
pm_runtime_put(sh_chan->dev);
return sh_chan->descs_allocated;
}
@ -323,6 +347,7 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
struct sh_desc *desc, *_desc;
LIST_HEAD(list);
int descs = sh_chan->descs_allocated;
dmae_halt(sh_chan);
@ -343,6 +368,9 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
spin_unlock_bh(&sh_chan->desc_lock);
if (descs > 0)
pm_runtime_put(sh_chan->dev);
list_for_each_entry_safe(desc, _desc, &list, node)
kfree(desc);
}
@ -559,6 +587,19 @@ static void sh_dmae_terminate_all(struct dma_chan *chan)
if (!chan)
return;
dmae_halt(sh_chan);
spin_lock_bh(&sh_chan->desc_lock);
if (!list_empty(&sh_chan->ld_queue)) {
/* Record partial transfer */
struct sh_desc *desc = list_entry(sh_chan->ld_queue.next,
struct sh_desc, node);
desc->partial = (desc->hw.tcr - sh_dmae_readl(sh_chan, TCR)) <<
sh_chan->xmit_shift;
}
spin_unlock_bh(&sh_chan->desc_lock);
sh_dmae_chan_ld_cleanup(sh_chan, true);
}
@ -661,7 +702,7 @@ static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all)
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
{
struct sh_desc *sd;
struct sh_desc *desc;
spin_lock_bh(&sh_chan->desc_lock);
/* DMA work check */
@ -671,10 +712,13 @@ static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
}
/* Find the first not transferred desciptor */
list_for_each_entry(sd, &sh_chan->ld_queue, node)
if (sd->mark == DESC_SUBMITTED) {
list_for_each_entry(desc, &sh_chan->ld_queue, node)
if (desc->mark == DESC_SUBMITTED) {
dev_dbg(sh_chan->dev, "Queue #%d to %d: %u@%x -> %x\n",
desc->async_tx.cookie, sh_chan->id,
desc->hw.tcr, desc->hw.sar, desc->hw.dar);
/* Get the ld start address from ld_queue */
dmae_set_reg(sh_chan, &sd->hw);
dmae_set_reg(sh_chan, &desc->hw);
dmae_start(sh_chan);
break;
}
@ -696,6 +740,7 @@ static enum dma_status sh_dmae_is_complete(struct dma_chan *chan,
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status status;
sh_dmae_chan_ld_cleanup(sh_chan, false);
@ -709,7 +754,27 @@ static enum dma_status sh_dmae_is_complete(struct dma_chan *chan,
if (used)
*used = last_used;
return dma_async_is_complete(cookie, last_complete, last_used);
spin_lock_bh(&sh_chan->desc_lock);
status = dma_async_is_complete(cookie, last_complete, last_used);
/*
* If we don't find cookie on the queue, it has been aborted and we have
* to report error
*/
if (status != DMA_SUCCESS) {
struct sh_desc *desc;
status = DMA_ERROR;
list_for_each_entry(desc, &sh_chan->ld_queue, node)
if (desc->cookie == cookie) {
status = DMA_IN_PROGRESS;
break;
}
}
spin_unlock_bh(&sh_chan->desc_lock);
return status;
}
static irqreturn_t sh_dmae_interrupt(int irq, void *data)
@ -732,40 +797,32 @@ static irqreturn_t sh_dmae_interrupt(int irq, void *data)
#if defined(CONFIG_CPU_SH4)
static irqreturn_t sh_dmae_err(int irq, void *data)
{
int err = 0;
struct sh_dmae_device *shdev = (struct sh_dmae_device *)data;
int i;
/* IRQ Multi */
if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
int __maybe_unused cnt = 0;
switch (irq) {
#if defined(DMTE6_IRQ) && defined(DMAE1_IRQ)
case DMTE6_IRQ:
cnt++;
#endif
case DMTE0_IRQ:
if (dmaor_read_reg(cnt) & (DMAOR_NMIF | DMAOR_AE)) {
disable_irq(irq);
return IRQ_HANDLED;
/* halt the dma controller */
sh_dmae_ctl_stop(shdev);
/* We cannot detect, which channel caused the error, have to reset all */
for (i = 0; i < SH_DMAC_MAX_CHANNELS; i++) {
struct sh_dmae_chan *sh_chan = shdev->chan[i];
if (sh_chan) {
struct sh_desc *desc;
/* Stop the channel */
dmae_halt(sh_chan);
/* Complete all */
list_for_each_entry(desc, &sh_chan->ld_queue, node) {
struct dma_async_tx_descriptor *tx = &desc->async_tx;
desc->mark = DESC_IDLE;
if (tx->callback)
tx->callback(tx->callback_param);
}
default:
return IRQ_NONE;
list_splice_init(&sh_chan->ld_queue, &sh_chan->ld_free);
}
} else {
/* reset dma controller */
err = sh_dmae_rst(0);
if (err)
return err;
#ifdef SH_DMAC_BASE1
if (shdev->pdata.mode & SHDMA_DMAOR1) {
err = sh_dmae_rst(1);
if (err)
return err;
}
#endif
disable_irq(irq);
return IRQ_HANDLED;
}
sh_dmae_rst(shdev);
return IRQ_HANDLED;
}
#endif
@ -796,19 +853,12 @@ static void dmae_do_tasklet(unsigned long data)
sh_dmae_chan_ld_cleanup(sh_chan, false);
}
static unsigned int get_dmae_irq(unsigned int id)
{
unsigned int irq = 0;
if (id < ARRAY_SIZE(dmte_irq_map))
irq = dmte_irq_map[id];
return irq;
}
static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
int irq, unsigned long flags)
{
int err;
unsigned int irq = get_dmae_irq(id);
unsigned long irqflags = IRQF_DISABLED;
struct sh_dmae_channel *chan_pdata = &shdev->pdata->channel[id];
struct platform_device *pdev = to_platform_device(shdev->common.dev);
struct sh_dmae_chan *new_sh_chan;
/* alloc channel */
@ -819,8 +869,13 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
return -ENOMEM;
}
/* copy struct dma_device */
new_sh_chan->common.device = &shdev->common;
new_sh_chan->dev = shdev->common.dev;
new_sh_chan->id = id;
new_sh_chan->irq = irq;
new_sh_chan->base = shdev->chan_reg + chan_pdata->offset / sizeof(u32);
/* Init DMA tasklet */
tasklet_init(&new_sh_chan->tasklet, dmae_do_tasklet,
@ -835,29 +890,20 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
INIT_LIST_HEAD(&new_sh_chan->ld_queue);
INIT_LIST_HEAD(&new_sh_chan->ld_free);
/* copy struct dma_device */
new_sh_chan->common.device = &shdev->common;
/* Add the channel to DMA device channel list */
list_add_tail(&new_sh_chan->common.device_node,
&shdev->common.channels);
shdev->common.chancnt++;
if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
irqflags = IRQF_SHARED;
#if defined(DMTE6_IRQ)
if (irq >= DMTE6_IRQ)
irq = DMTE6_IRQ;
else
#endif
irq = DMTE0_IRQ;
}
snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
"sh-dmae%d", new_sh_chan->id);
if (pdev->id >= 0)
snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
"sh-dmae%d.%d", pdev->id, new_sh_chan->id);
else
snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
"sh-dma%d", new_sh_chan->id);
/* set up channel irq */
err = request_irq(irq, &sh_dmae_interrupt, irqflags,
err = request_irq(irq, &sh_dmae_interrupt, flags,
new_sh_chan->dev_id, new_sh_chan);
if (err) {
dev_err(shdev->common.dev, "DMA channel %d request_irq error "
@ -881,12 +927,12 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev)
for (i = shdev->common.chancnt - 1 ; i >= 0 ; i--) {
if (shdev->chan[i]) {
struct sh_dmae_chan *shchan = shdev->chan[i];
if (!(shdev->pdata.mode & SHDMA_MIX_IRQ))
free_irq(dmte_irq_map[i], shchan);
struct sh_dmae_chan *sh_chan = shdev->chan[i];
list_del(&shchan->common.device_node);
kfree(shchan);
free_irq(sh_chan->irq, sh_chan);
list_del(&sh_chan->common.device_node);
kfree(sh_chan);
shdev->chan[i] = NULL;
}
}
@ -895,47 +941,84 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev)
static int __init sh_dmae_probe(struct platform_device *pdev)
{
int err = 0, cnt, ecnt;
unsigned long irqflags = IRQF_DISABLED;
#if defined(CONFIG_CPU_SH4)
int eirq[] = { DMAE0_IRQ,
#if defined(DMAE1_IRQ)
DMAE1_IRQ
#endif
};
#endif
struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
unsigned long irqflags = IRQF_DISABLED,
chan_flag[SH_DMAC_MAX_CHANNELS] = {};
int errirq, chan_irq[SH_DMAC_MAX_CHANNELS];
int err, i, irq_cnt = 0, irqres = 0;
struct sh_dmae_device *shdev;
struct resource *chan, *dmars, *errirq_res, *chanirq_res;
/* get platform data */
if (!pdev->dev.platform_data)
if (!pdata || !pdata->channel_num)
return -ENODEV;
chan = platform_get_resource(pdev, IORESOURCE_MEM, 0);
/* DMARS area is optional, if absent, this controller cannot do slave DMA */
dmars = platform_get_resource(pdev, IORESOURCE_MEM, 1);
/*
* IRQ resources:
* 1. there always must be at least one IRQ IO-resource. On SH4 it is
* the error IRQ, in which case it is the only IRQ in this resource:
* start == end. If it is the only IRQ resource, all channels also
* use the same IRQ.
* 2. DMA channel IRQ resources can be specified one per resource or in
* ranges (start != end)
* 3. iff all events (channels and, optionally, error) on this
* controller use the same IRQ, only one IRQ resource can be
* specified, otherwise there must be one IRQ per channel, even if
* some of them are equal
* 4. if all IRQs on this controller are equal or if some specific IRQs
* specify IORESOURCE_IRQ_SHAREABLE in their resources, they will be
* requested with the IRQF_SHARED flag
*/
errirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!chan || !errirq_res)
return -ENODEV;
if (!request_mem_region(chan->start, resource_size(chan), pdev->name)) {
dev_err(&pdev->dev, "DMAC register region already claimed\n");
return -EBUSY;
}
if (dmars && !request_mem_region(dmars->start, resource_size(dmars), pdev->name)) {
dev_err(&pdev->dev, "DMAC DMARS region already claimed\n");
err = -EBUSY;
goto ermrdmars;
}
err = -ENOMEM;
shdev = kzalloc(sizeof(struct sh_dmae_device), GFP_KERNEL);
if (!shdev) {
dev_err(&pdev->dev, "No enough memory\n");
return -ENOMEM;
dev_err(&pdev->dev, "Not enough memory\n");
goto ealloc;
}
shdev->chan_reg = ioremap(chan->start, resource_size(chan));
if (!shdev->chan_reg)
goto emapchan;
if (dmars) {
shdev->dmars = ioremap(dmars->start, resource_size(dmars));
if (!shdev->dmars)
goto emapdmars;
}
/* platform data */
memcpy(&shdev->pdata, pdev->dev.platform_data,
sizeof(struct sh_dmae_pdata));
shdev->pdata = pdata;
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
/* reset dma controller */
err = sh_dmae_rst(0);
err = sh_dmae_rst(shdev);
if (err)
goto rst_err;
/* SH7780/85/23 has DMAOR1 */
if (shdev->pdata.mode & SHDMA_DMAOR1) {
err = sh_dmae_rst(1);
if (err)
goto rst_err;
}
INIT_LIST_HEAD(&shdev->common.channels);
dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask);
dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
if (dmars)
dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
shdev->common.device_alloc_chan_resources
= sh_dmae_alloc_chan_resources;
@ -950,37 +1033,72 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
shdev->common.dev = &pdev->dev;
/* Default transfer size of 32 bytes requires 32-byte alignment */
shdev->common.copy_align = 5;
shdev->common.copy_align = LOG2_DEFAULT_XFER_SIZE;
#if defined(CONFIG_CPU_SH4)
/* Non Mix IRQ mode SH7722/SH7730 etc... */
if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
chanirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
if (!chanirq_res)
chanirq_res = errirq_res;
else
irqres++;
if (chanirq_res == errirq_res ||
(errirq_res->flags & IORESOURCE_BITS) == IORESOURCE_IRQ_SHAREABLE)
irqflags = IRQF_SHARED;
eirq[0] = DMTE0_IRQ;
#if defined(DMTE6_IRQ) && defined(DMAE1_IRQ)
eirq[1] = DMTE6_IRQ;
#endif
errirq = errirq_res->start;
err = request_irq(errirq, sh_dmae_err, irqflags,
"DMAC Address Error", shdev);
if (err) {
dev_err(&pdev->dev,
"DMA failed requesting irq #%d, error %d\n",
errirq, err);
goto eirq_err;
}
for (ecnt = 0 ; ecnt < ARRAY_SIZE(eirq); ecnt++) {
err = request_irq(eirq[ecnt], sh_dmae_err, irqflags,
"DMAC Address Error", shdev);
if (err) {
dev_err(&pdev->dev, "DMA device request_irq"
"error (irq %d) with return %d\n",
eirq[ecnt], err);
goto eirq_err;
}
}
#else
chanirq_res = errirq_res;
#endif /* CONFIG_CPU_SH4 */
if (chanirq_res->start == chanirq_res->end &&
!platform_get_resource(pdev, IORESOURCE_IRQ, 1)) {
/* Special case - all multiplexed */
for (; irq_cnt < pdata->channel_num; irq_cnt++) {
chan_irq[irq_cnt] = chanirq_res->start;
chan_flag[irq_cnt] = IRQF_SHARED;
}
} else {
do {
for (i = chanirq_res->start; i <= chanirq_res->end; i++) {
if ((errirq_res->flags & IORESOURCE_BITS) ==
IORESOURCE_IRQ_SHAREABLE)
chan_flag[irq_cnt] = IRQF_SHARED;
else
chan_flag[irq_cnt] = IRQF_DISABLED;
dev_dbg(&pdev->dev,
"Found IRQ %d for channel %d\n",
i, irq_cnt);
chan_irq[irq_cnt++] = i;
}
chanirq_res = platform_get_resource(pdev,
IORESOURCE_IRQ, ++irqres);
} while (irq_cnt < pdata->channel_num && chanirq_res);
}
if (irq_cnt < pdata->channel_num)
goto eirqres;
/* Create DMA Channel */
for (cnt = 0 ; cnt < MAX_DMA_CHANNELS ; cnt++) {
err = sh_dmae_chan_probe(shdev, cnt);
for (i = 0; i < pdata->channel_num; i++) {
err = sh_dmae_chan_probe(shdev, i, chan_irq[i], chan_flag[i]);
if (err)
goto chan_probe_err;
}
pm_runtime_put(&pdev->dev);
platform_set_drvdata(pdev, shdev);
dma_async_device_register(&shdev->common);
@ -988,13 +1106,24 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
chan_probe_err:
sh_dmae_chan_remove(shdev);
eirqres:
#if defined(CONFIG_CPU_SH4)
free_irq(errirq, shdev);
eirq_err:
for (ecnt-- ; ecnt >= 0; ecnt--)
free_irq(eirq[ecnt], shdev);
#endif
rst_err:
pm_runtime_put(&pdev->dev);
if (dmars)
iounmap(shdev->dmars);
emapdmars:
iounmap(shdev->chan_reg);
emapchan:
kfree(shdev);
ealloc:
if (dmars)
release_mem_region(dmars->start, resource_size(dmars));
ermrdmars:
release_mem_region(chan->start, resource_size(chan));
return err;
}
@ -1002,36 +1131,39 @@ rst_err:
static int __exit sh_dmae_remove(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
struct resource *res;
int errirq = platform_get_irq(pdev, 0);
dma_async_device_unregister(&shdev->common);
if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
free_irq(DMTE0_IRQ, shdev);
#if defined(DMTE6_IRQ)
free_irq(DMTE6_IRQ, shdev);
#endif
}
if (errirq > 0)
free_irq(errirq, shdev);
/* channel data remove */
sh_dmae_chan_remove(shdev);
if (!(shdev->pdata.mode & SHDMA_MIX_IRQ)) {
free_irq(DMAE0_IRQ, shdev);
#if defined(DMAE1_IRQ)
free_irq(DMAE1_IRQ, shdev);
#endif
}
pm_runtime_disable(&pdev->dev);
if (shdev->dmars)
iounmap(shdev->dmars);
iounmap(shdev->chan_reg);
kfree(shdev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res)
release_mem_region(res->start, resource_size(res));
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res)
release_mem_region(res->start, resource_size(res));
return 0;
}
static void sh_dmae_shutdown(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
sh_dmae_ctl_stop(0);
if (shdev->pdata.mode & SHDMA_DMAOR1)
sh_dmae_ctl_stop(1);
sh_dmae_ctl_stop(shdev);
}
static struct platform_driver sh_dmae_driver = {

26
drivers/dma/shdma.h
View File

@ -17,24 +17,10 @@
#include <linux/interrupt.h>
#include <linux/list.h>
#include <asm/dmaengine.h>
#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */
struct sh_dmae_regs {
u32 sar; /* SAR / source address */
u32 dar; /* DAR / destination address */
u32 tcr; /* TCR / transfer count */
};
struct sh_desc {
struct sh_dmae_regs hw;
struct list_head node;
struct dma_async_tx_descriptor async_tx;
enum dma_data_direction direction;
dma_cookie_t cookie;
int chunks;
int mark;
};
struct device;
struct sh_dmae_chan {
@ -47,14 +33,18 @@ struct sh_dmae_chan {
struct tasklet_struct tasklet; /* Tasklet */
int descs_allocated; /* desc count */
int xmit_shift; /* log_2(bytes_per_xfer) */
int irq;
int id; /* Raw id of this channel */
u32 __iomem *base;
char dev_id[16]; /* unique name per DMAC of channel */
};
struct sh_dmae_device {
struct dma_device common;
struct sh_dmae_chan *chan[MAX_DMA_CHANNELS];
struct sh_dmae_pdata pdata;
struct sh_dmae_chan *chan[SH_DMAC_MAX_CHANNELS];
struct sh_dmae_pdata *pdata;
u32 __iomem *chan_reg;
u16 __iomem *dmars;
};
#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)

4
drivers/serial/Kconfig
View File

@ -1009,6 +1009,10 @@ config SERIAL_SH_SCI_CONSOLE
depends on SERIAL_SH_SCI=y
select SERIAL_CORE_CONSOLE
config SERIAL_SH_SCI_DMA
bool "DMA support"
depends on SERIAL_SH_SCI && SH_DMAE && EXPERIMENTAL
config SERIAL_PNX8XXX
bool "Enable PNX8XXX SoCs' UART Support"
depends on MIPS && (SOC_PNX8550 || SOC_PNX833X)

616
drivers/serial/sh-sci.c
View File

@ -48,6 +48,9 @@
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/list.h>
#include <linux/dmaengine.h>
#include <linux/scatterlist.h>
#include <linux/timer.h>
#ifdef CONFIG_SUPERH
#include <asm/sh_bios.h>
@ -84,6 +87,27 @@ struct sci_port {
struct clk *dclk;
struct list_head node;
struct dma_chan *chan_tx;
struct dma_chan *chan_rx;
#ifdef CONFIG_SERIAL_SH_SCI_DMA
struct device *dma_dev;
enum sh_dmae_slave_chan_id slave_tx;
enum sh_dmae_slave_chan_id slave_rx;
struct dma_async_tx_descriptor *desc_tx;
struct dma_async_tx_descriptor *desc_rx[2];
dma_cookie_t cookie_tx;
dma_cookie_t cookie_rx[2];
dma_cookie_t active_rx;
struct scatterlist sg_tx;
unsigned int sg_len_tx;
struct scatterlist sg_rx[2];
size_t buf_len_rx;
struct sh_dmae_slave param_tx;
struct sh_dmae_slave param_rx;
struct work_struct work_tx;
struct work_struct work_rx;
struct timer_list rx_timer;
#endif
};
struct sh_sci_priv {
@ -269,29 +293,44 @@ static inline void sci_init_pins(struct uart_port *port, unsigned int cflag)
defined(CONFIG_CPU_SUBTYPE_SH7780) || \
defined(CONFIG_CPU_SUBTYPE_SH7785) || \
defined(CONFIG_CPU_SUBTYPE_SH7786)
static inline int scif_txroom(struct uart_port *port)
static int scif_txfill(struct uart_port *port)
{
return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff);
return sci_in(port, SCTFDR) & 0xff;
}
static inline int scif_rxroom(struct uart_port *port)
static int scif_txroom(struct uart_port *port)
{
return SCIF_TXROOM_MAX - scif_txfill(port);
}
static int scif_rxfill(struct uart_port *port)
{
return sci_in(port, SCRFDR) & 0xff;
}
#elif defined(CONFIG_CPU_SUBTYPE_SH7763)
static inline int scif_txroom(struct uart_port *port)
static int scif_txfill(struct uart_port *port)
{
if ((port->mapbase == 0xffe00000) ||
(port->mapbase == 0xffe08000)) {
if (port->mapbase == 0xffe00000 ||
port->mapbase == 0xffe08000)
/* SCIF0/1*/
return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff);
} else {
return sci_in(port, SCTFDR) & 0xff;
else
/* SCIF2 */
return SCIF2_TXROOM_MAX - (sci_in(port, SCFDR) >> 8);
}
return sci_in(port, SCFDR) >> 8;
}
static inline int scif_rxroom(struct uart_port *port)
static int scif_txroom(struct uart_port *port)
{
if (port->mapbase == 0xffe00000 ||
port->mapbase == 0xffe08000)
/* SCIF0/1*/
return SCIF_TXROOM_MAX - scif_txfill(port);
else
/* SCIF2 */
return SCIF2_TXROOM_MAX - scif_txfill(port);
}
static int scif_rxfill(struct uart_port *port)
{
if ((port->mapbase == 0xffe00000) ||
(port->mapbase == 0xffe08000)) {
@ -303,23 +342,33 @@ static inline int scif_rxroom(struct uart_port *port)
}
}
#else
static inline int scif_txroom(struct uart_port *port)
static int scif_txfill(struct uart_port *port)
{
return SCIF_TXROOM_MAX - (sci_in(port, SCFDR) >> 8);
return sci_in(port, SCFDR) >> 8;
}
static inline int scif_rxroom(struct uart_port *port)
static int scif_txroom(struct uart_port *port)
{
return SCIF_TXROOM_MAX - scif_txfill(port);
}
static int scif_rxfill(struct uart_port *port)
{
return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
}
#endif
static inline int sci_txroom(struct uart_port *port)
static int sci_txfill(struct uart_port *port)
{
return (sci_in(port, SCxSR) & SCI_TDRE) != 0;
return !(sci_in(port, SCxSR) & SCI_TDRE);
}
static inline int sci_rxroom(struct uart_port *port)
static int sci_txroom(struct uart_port *port)
{
return !sci_txfill(port);
}
static int sci_rxfill(struct uart_port *port)
{
return (sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0;
}
@ -406,9 +455,9 @@ static inline void sci_receive_chars(struct uart_port *port)
while (1) {
if (port->type == PORT_SCI)
count = sci_rxroom(port);
count = sci_rxfill(port);
else
count = scif_rxroom(port);
count = scif_rxfill(port);
/* Don't copy more bytes than there is room for in the buffer */
count = tty_buffer_request_room(tty, count);
@ -453,10 +502,10 @@ static inline void sci_receive_chars(struct uart_port *port)
}
/* Store data and status */
if (status&SCxSR_FER(port)) {
if (status & SCxSR_FER(port)) {
flag = TTY_FRAME;
dev_notice(port->dev, "frame error\n");
} else if (status&SCxSR_PER(port)) {
} else if (status & SCxSR_PER(port)) {
flag = TTY_PARITY;
dev_notice(port->dev, "parity error\n");
} else
@ -618,13 +667,39 @@ static inline int sci_handle_breaks(struct uart_port *port)
return copied;
}
static irqreturn_t sci_rx_interrupt(int irq, void *port)
static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
{
#ifdef CONFIG_SERIAL_SH_SCI_DMA
struct uart_port *port = ptr;
struct sci_port *s = to_sci_port(port);
if (s->chan_rx) {
unsigned long tout;
u16 scr = sci_in(port, SCSCR);
u16 ssr = sci_in(port, SCxSR);
/* Disable future Rx interrupts */
sci_out(port, SCSCR, scr & ~SCI_CTRL_FLAGS_RIE);
/* Clear current interrupt */
sci_out(port, SCxSR, ssr & ~(1 | SCxSR_RDxF(port)));
/* Calculate delay for 1.5 DMA buffers */
tout = (port->timeout - HZ / 50) * s->buf_len_rx * 3 /
port->fifosize / 2;
dev_dbg(port->dev, "Rx IRQ: setup timeout in %lu ms\n",
tout * 1000 / HZ);
if (tout < 2)
tout = 2;
mod_timer(&s->rx_timer, jiffies + tout);
return IRQ_HANDLED;
}
#endif
/* I think sci_receive_chars has to be called irrespective
* of whether the I_IXOFF is set, otherwise, how is the interrupt
* to be disabled?
*/
sci_receive_chars(port);
sci_receive_chars(ptr);
return IRQ_HANDLED;
}
@ -680,6 +755,7 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
{
unsigned short ssr_status, scr_status, err_enabled;
struct uart_port *port = ptr;
struct sci_port *s = to_sci_port(port);
irqreturn_t ret = IRQ_NONE;
ssr_status = sci_in(port, SCxSR);
@ -687,10 +763,15 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
err_enabled = scr_status & (SCI_CTRL_FLAGS_REIE | SCI_CTRL_FLAGS_RIE);
/* Tx Interrupt */
if ((ssr_status & SCxSR_TDxE(port)) && (scr_status & SCI_CTRL_FLAGS_TIE))
if ((ssr_status & SCxSR_TDxE(port)) && (scr_status & SCI_CTRL_FLAGS_TIE) &&
!s->chan_tx)
ret = sci_tx_interrupt(irq, ptr);
/* Rx Interrupt */
if ((ssr_status & SCxSR_RDxF(port)) && (scr_status & SCI_CTRL_FLAGS_RIE))
/*
* Rx Interrupt: if we're using DMA, the DMA controller clears RDF /
* DR flags
*/
if (((ssr_status & SCxSR_RDxF(port)) || s->chan_rx) &&
(scr_status & SCI_CTRL_FLAGS_RIE))
ret = sci_rx_interrupt(irq, ptr);
/* Error Interrupt */
if ((ssr_status & SCxSR_ERRORS(port)) && err_enabled)
@ -699,6 +780,10 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
if ((ssr_status & SCxSR_BRK(port)) && err_enabled)
ret = sci_br_interrupt(irq, ptr);
WARN_ONCE(ret == IRQ_NONE,
"%s: %d IRQ %d, status %x, control %x\n", __func__,
irq, port->line, ssr_status, scr_status);
return ret;
}
@ -800,7 +885,9 @@ static void sci_free_irq(struct sci_port *port)
static unsigned int sci_tx_empty(struct uart_port *port)
{
unsigned short status = sci_in(port, SCxSR);
return status & SCxSR_TEND(port) ? TIOCSER_TEMT : 0;
unsigned short in_tx_fifo = scif_txfill(port);
return (status & SCxSR_TEND(port)) && !in_tx_fifo ? TIOCSER_TEMT : 0;
}
static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
@ -812,16 +899,297 @@ static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
static unsigned int sci_get_mctrl(struct uart_port *port)
{
/* This routine is used for geting signals of: DTR, DCD, DSR, RI,
/* This routine is used for getting signals of: DTR, DCD, DSR, RI,
and CTS/RTS */
return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
}
#ifdef CONFIG_SERIAL_SH_SCI_DMA
static void sci_dma_tx_complete(void *arg)
{
struct sci_port *s = arg;
struct uart_port *port = &s->port;
struct circ_buf *xmit = &port->state->xmit;
unsigned long flags;
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
spin_lock_irqsave(&port->lock, flags);
xmit->tail += s->sg_tx.length;
xmit->tail &= UART_XMIT_SIZE - 1;
port->icount.tx += s->sg_tx.length;
async_tx_ack(s->desc_tx);
s->cookie_tx = -EINVAL;
s->desc_tx = NULL;
spin_unlock_irqrestore(&port->lock, flags);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (uart_circ_chars_pending(xmit))
schedule_work(&s->work_tx);
}
/* Locking: called with port lock held */
static int sci_dma_rx_push(struct sci_port *s, struct tty_struct *tty,
size_t count)
{
struct uart_port *port = &s->port;
int i, active, room;
room = tty_buffer_request_room(tty, count);
if (s->active_rx == s->cookie_rx[0]) {
active = 0;
} else if (s->active_rx == s->cookie_rx[1]) {
active = 1;
} else {
dev_err(port->dev, "cookie %d not found!\n", s->active_rx);
return 0;
}
if (room < count)
dev_warn(port->dev, "Rx overrun: dropping %u bytes\n",
count - room);
if (!room)
return room;
for (i = 0; i < room; i++)
tty_insert_flip_char(tty, ((u8 *)sg_virt(&s->sg_rx[active]))[i],
TTY_NORMAL);
port->icount.rx += room;
return room;
}
static void sci_dma_rx_complete(void *arg)
{
struct sci_port *s = arg;
struct uart_port *port = &s->port;
struct tty_struct *tty = port->state->port.tty;
unsigned long flags;
int count;
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
spin_lock_irqsave(&port->lock, flags);
count = sci_dma_rx_push(s, tty, s->buf_len_rx);
mod_timer(&s->rx_timer, jiffies + msecs_to_jiffies(5));
spin_unlock_irqrestore(&port->lock, flags);
if (count)
tty_flip_buffer_push(tty);
schedule_work(&s->work_rx);
}
static void sci_start_rx(struct uart_port *port);
static void sci_start_tx(struct uart_port *port);
static void sci_rx_dma_release(struct sci_port *s, bool enable_pio)
{
struct dma_chan *chan = s->chan_rx;
struct uart_port *port = &s->port;
s->chan_rx = NULL;
s->cookie_rx[0] = s->cookie_rx[1] = -EINVAL;
dma_release_channel(chan);
dma_free_coherent(port->dev, s->buf_len_rx * 2,
sg_virt(&s->sg_rx[0]), sg_dma_address(&s->sg_rx[0]));
if (enable_pio)
sci_start_rx(port);
}
static void sci_tx_dma_release(struct sci_port *s, bool enable_pio)
{
struct dma_chan *chan = s->chan_tx;
struct uart_port *port = &s->port;
s->chan_tx = NULL;
s->cookie_tx = -EINVAL;
dma_release_channel(chan);
if (enable_pio)
sci_start_tx(port);
}
static void sci_submit_rx(struct sci_port *s)
{
struct dma_chan *chan = s->chan_rx;
int i;
for (i = 0; i < 2; i++) {
struct scatterlist *sg = &s->sg_rx[i];
struct dma_async_tx_descriptor *desc;
desc = chan->device->device_prep_slave_sg(chan,
sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT);
if (desc) {
s->desc_rx[i] = desc;
desc->callback = sci_dma_rx_complete;
desc->callback_param = s;
s->cookie_rx[i] = desc->tx_submit(desc);
}
if (!desc || s->cookie_rx[i] < 0) {
if (i) {
async_tx_ack(s->desc_rx[0]);
s->cookie_rx[0] = -EINVAL;
}
if (desc) {
async_tx_ack(desc);
s->cookie_rx[i] = -EINVAL;
}
dev_warn(s->port.dev,
"failed to re-start DMA, using PIO\n");
sci_rx_dma_release(s, true);
return;
}
}
s->active_rx = s->cookie_rx[0];
dma_async_issue_pending(chan);
}
static void work_fn_rx(struct work_struct *work)
{
struct sci_port *s = container_of(work, struct sci_port, work_rx);
struct uart_port *port = &s->port;
struct dma_async_tx_descriptor *desc;
int new;
if (s->active_rx == s->cookie_rx[0]) {
new = 0;
} else if (s->active_rx == s->cookie_rx[1]) {
new = 1;
} else {
dev_err(port->dev, "cookie %d not found!\n", s->active_rx);
return;
}
desc = s->desc_rx[new];
if (dma_async_is_tx_complete(s->chan_rx, s->active_rx, NULL, NULL) !=
DMA_SUCCESS) {
/* Handle incomplete DMA receive */
struct tty_struct *tty = port->state->port.tty;
struct dma_chan *chan = s->chan_rx;
struct sh_desc *sh_desc = container_of(desc, struct sh_desc,
async_tx);
unsigned long flags;
int count;
chan->device->device_terminate_all(chan);
dev_dbg(port->dev, "Read %u bytes with cookie %d\n",
sh_desc->partial, sh_desc->cookie);
spin_lock_irqsave(&port->lock, flags);
count = sci_dma_rx_push(s, tty, sh_desc->partial);
spin_unlock_irqrestore(&port->lock, flags);
if (count)
tty_flip_buffer_push(tty);
sci_submit_rx(s);
return;
}
s->cookie_rx[new] = desc->tx_submit(desc);
if (s->cookie_rx[new] < 0) {
dev_warn(port->dev, "Failed submitting Rx DMA descriptor\n");
sci_rx_dma_release(s, true);
return;
}
dev_dbg(port->dev, "%s: cookie %d #%d\n", __func__,
s->cookie_rx[new], new);
s->active_rx = s->cookie_rx[!new];
}
static void work_fn_tx(struct work_struct *work)
{
struct sci_port *s = container_of(work, struct sci_port, work_tx);
struct dma_async_tx_descriptor *desc;
struct dma_chan *chan = s->chan_tx;
struct uart_port *port = &s->port;
struct circ_buf *xmit = &port->state->xmit;
struct scatterlist *sg = &s->sg_tx;
/*
* DMA is idle now.
* Port xmit buffer is already mapped, and it is one page... Just adjust
* offsets and lengths. Since it is a circular buffer, we have to
* transmit till the end, and then the rest. Take the port lock to get a
* consistent xmit buffer state.
*/
spin_lock_irq(&port->lock);
sg->offset = xmit->tail & (UART_XMIT_SIZE - 1);
sg->dma_address = (sg_dma_address(sg) & ~(UART_XMIT_SIZE - 1)) +
sg->offset;
sg->length = min((int)CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE),
CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE));
sg->dma_length = sg->length;
spin_unlock_irq(&port->lock);
BUG_ON(!sg->length);
desc = chan->device->device_prep_slave_sg(chan,
sg, s->sg_len_tx, DMA_TO_DEVICE,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
/* switch to PIO */
sci_tx_dma_release(s, true);
return;
}
dma_sync_sg_for_device(port->dev, sg, 1, DMA_TO_DEVICE);
spin_lock_irq(&port->lock);
s->desc_tx = desc;
desc->callback = sci_dma_tx_complete;
desc->callback_param = s;
spin_unlock_irq(&port->lock);
s->cookie_tx = desc->tx_submit(desc);
if (s->cookie_tx < 0) {
dev_warn(port->dev, "Failed submitting Tx DMA descriptor\n");
/* switch to PIO */
sci_tx_dma_release(s, true);
return;
}
dev_dbg(port->dev, "%s: %p: %d...%d, cookie %d\n", __func__,
xmit->buf, xmit->tail, xmit->head, s->cookie_tx);
dma_async_issue_pending(chan);
}
#endif
static void sci_start_tx(struct uart_port *port)
{
unsigned short ctrl;
#ifdef CONFIG_SERIAL_SH_SCI_DMA
struct sci_port *s = to_sci_port(port);
if (s->chan_tx) {
if (!uart_circ_empty(&s->port.state->xmit) && s->cookie_tx < 0)
schedule_work(&s->work_tx);
return;
}
#endif
/* Set TIE (Transmit Interrupt Enable) bit in SCSCR */
ctrl = sci_in(port, SCSCR);
ctrl |= SCI_CTRL_FLAGS_TIE;
@ -838,13 +1206,12 @@ static void sci_stop_tx(struct uart_port *port)
sci_out(port, SCSCR, ctrl);
}
static void sci_start_rx(struct uart_port *port, unsigned int tty_start)
static void sci_start_rx(struct uart_port *port)
{
unsigned short ctrl;
unsigned short ctrl = SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE;
/* Set RIE (Receive Interrupt Enable) bit in SCSCR */
ctrl = sci_in(port, SCSCR);
ctrl |= SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE;
ctrl |= sci_in(port, SCSCR);
sci_out(port, SCSCR, ctrl);
}
@ -868,16 +1235,154 @@ static void sci_break_ctl(struct uart_port *port, int break_state)
/* Nothing here yet .. */
}
#ifdef CONFIG_SERIAL_SH_SCI_DMA
static bool filter(struct dma_chan *chan, void *slave)
{
struct sh_dmae_slave *param = slave;
dev_dbg(chan->device->dev, "%s: slave ID %d\n", __func__,
param->slave_id);
if (param->dma_dev == chan->device->dev) {
chan->private = param;
return true;
} else {
return false;
}
}
static void rx_timer_fn(unsigned long arg)
{
struct sci_port *s = (struct sci_port *)arg;
struct uart_port *port = &s->port;
u16 scr = sci_in(port, SCSCR);
sci_out(port, SCSCR, scr | SCI_CTRL_FLAGS_RIE);
dev_dbg(port->dev, "DMA Rx timed out\n");
schedule_work(&s->work_rx);
}
static void sci_request_dma(struct uart_port *port)
{
struct sci_port *s = to_sci_port(port);
struct sh_dmae_slave *param;
struct dma_chan *chan;
dma_cap_mask_t mask;
int nent;
dev_dbg(port->dev, "%s: port %d DMA %p\n", __func__,
port->line, s->dma_dev);
if (!s->dma_dev)
return;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
param = &s->param_tx;
/* Slave ID, e.g., SHDMA_SLAVE_SCIF0_TX */
param->slave_id = s->slave_tx;
param->dma_dev = s->dma_dev;
s->cookie_tx = -EINVAL;
chan = dma_request_channel(mask, filter, param);
dev_dbg(port->dev, "%s: TX: got channel %p\n", __func__, chan);
if (chan) {
s->chan_tx = chan;
sg_init_table(&s->sg_tx, 1);
/* UART circular tx buffer is an aligned page. */
BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK);
sg_set_page(&s->sg_tx, virt_to_page(port->state->xmit.buf),
UART_XMIT_SIZE, (int)port->state->xmit.buf & ~PAGE_MASK);
nent = dma_map_sg(port->dev, &s->sg_tx, 1, DMA_TO_DEVICE);
if (!nent)
sci_tx_dma_release(s, false);
else
dev_dbg(port->dev, "%s: mapped %d@%p to %x\n", __func__,
sg_dma_len(&s->sg_tx),
port->state->xmit.buf, sg_dma_address(&s->sg_tx));
s->sg_len_tx = nent;
INIT_WORK(&s->work_tx, work_fn_tx);
}
param = &s->param_rx;
/* Slave ID, e.g., SHDMA_SLAVE_SCIF0_RX */
param->slave_id = s->slave_rx;
param->dma_dev = s->dma_dev;
chan = dma_request_channel(mask, filter, param);
dev_dbg(port->dev, "%s: RX: got channel %p\n", __func__, chan);
if (chan) {
dma_addr_t dma[2];
void *buf[2];
int i;
s->chan_rx = chan;
s->buf_len_rx = 2 * max(16, (int)port->fifosize);
buf[0] = dma_alloc_coherent(port->dev, s->buf_len_rx * 2,
&dma[0], GFP_KERNEL);
if (!buf[0]) {
dev_warn(port->dev,
"failed to allocate dma buffer, using PIO\n");
sci_rx_dma_release(s, true);
return;
}
buf[1] = buf[0] + s->buf_len_rx;
dma[1] = dma[0] + s->buf_len_rx;
for (i = 0; i < 2; i++) {
struct scatterlist *sg = &s->sg_rx[i];
sg_init_table(sg, 1);
sg_set_page(sg, virt_to_page(buf[i]), s->buf_len_rx,
(int)buf[i] & ~PAGE_MASK);
sg->dma_address = dma[i];
sg->dma_length = sg->length;
}
INIT_WORK(&s->work_rx, work_fn_rx);
setup_timer(&s->rx_timer, rx_timer_fn, (unsigned long)s);
sci_submit_rx(s);
}
}
static void sci_free_dma(struct uart_port *port)
{
struct sci_port *s = to_sci_port(port);
if (!s->dma_dev)
return;
if (s->chan_tx)
sci_tx_dma_release(s, false);
if (s->chan_rx)
sci_rx_dma_release(s, false);
}
#endif
static int sci_startup(struct uart_port *port)
{
struct sci_port *s = to_sci_port(port);
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
if (s->enable)
s->enable(port);
sci_request_irq(s);
#ifdef CONFIG_SERIAL_SH_SCI_DMA
sci_request_dma(port);
#endif
sci_start_tx(port);
sci_start_rx(port, 1);
sci_start_rx(port);
return 0;
}
@ -886,8 +1391,13 @@ static void sci_shutdown(struct uart_port *port)
{
struct sci_port *s = to_sci_port(port);
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
sci_stop_rx(port);
sci_stop_tx(port);
#ifdef CONFIG_SERIAL_SH_SCI_DMA
sci_free_dma(port);
#endif
sci_free_irq(s);
if (s->disable)
@ -937,6 +1447,9 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
sci_out(port, SCSMR, smr_val);
dev_dbg(port->dev, "%s: SMR %x, t %x, SCSCR %x\n", __func__, smr_val, t,
SCSCR_INIT(port));
if (t > 0) {
if (t >= 256) {
sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1);
@ -954,7 +1467,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
sci_out(port, SCSCR, SCSCR_INIT(port));
if ((termios->c_cflag & CREAD) != 0)
sci_start_rx(port, 0);
sci_start_rx(port);
}
static const char *sci_type(struct uart_port *port)
@ -1049,19 +1562,21 @@ static void __devinit sci_init_single(struct platform_device *dev,
unsigned int index,
struct plat_sci_port *p)
{
sci_port->port.ops = &sci_uart_ops;
sci_port->port.iotype = UPIO_MEM;
sci_port->port.line = index;
struct uart_port *port = &sci_port->port;
port->ops = &sci_uart_ops;
port->iotype = UPIO_MEM;
port->line = index;
switch (p->type) {
case PORT_SCIFA:
sci_port->port.fifosize = 64;
port->fifosize = 64;
break;
case PORT_SCIF:
sci_port->port.fifosize = 16;
port->fifosize = 16;
break;
default:
sci_port->port.fifosize = 1;
port->fifosize = 1;
break;
}
@ -1070,19 +1585,28 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->dclk = clk_get(&dev->dev, "peripheral_clk");
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
sci_port->port.dev = &dev->dev;
port->dev = &dev->dev;
}
sci_port->break_timer.data = (unsigned long)sci_port;
sci_port->break_timer.function = sci_break_timer;
init_timer(&sci_port->break_timer);
sci_port->port.mapbase = p->mapbase;
sci_port->port.membase = p->membase;
port->mapbase = p->mapbase;
port->membase = p->membase;
sci_port->port.irq = p->irqs[SCIx_TXI_IRQ];
sci_port->port.flags = p->flags;
sci_port->type = sci_port->port.type = p->type;
port->irq = p->irqs[SCIx_TXI_IRQ];
port->flags = p->flags;
sci_port->type = port->type = p->type;
#ifdef CONFIG_SERIAL_SH_SCI_DMA
sci_port->dma_dev = p->dma_dev;
sci_port->slave_tx = p->dma_slave_tx;
sci_port->slave_rx = p->dma_slave_rx;
dev_dbg(port->dev, "%s: DMA device %p, tx %d, rx %d\n", __func__,
p->dma_dev, p->dma_slave_tx, p->dma_slave_rx);
#endif
memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs));
}

6
include/linux/serial_sci.h
View File

@ -2,6 +2,7 @@
#define __LINUX_SERIAL_SCI_H
#include <linux/serial_core.h>
#include <asm/dmaengine.h>
/*
* Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
@ -16,6 +17,8 @@ enum {
SCIx_NR_IRQS,
};
struct device;
/*
* Platform device specific platform_data struct
*/
@ -26,6 +29,9 @@ struct plat_sci_port {
unsigned int type; /* SCI / SCIF / IRDA */
upf_t flags; /* UPF_* flags */
char *clk; /* clock string */
struct device *dma_dev;
enum sh_dmae_slave_chan_id dma_slave_tx;
enum sh_dmae_slave_chan_id dma_slave_rx;
};
#endif /* __LINUX_SERIAL_SCI_H */

2
sound/soc/sh/siu.h
View File

@ -72,7 +72,7 @@ struct siu_firmware {
#include <linux/interrupt.h>
#include <linux/io.h>
#include <asm/dma-sh.h>
#include <asm/dmaengine.h>
#include <sound/core.h>
#include <sound/pcm.h>

2
sound/soc/sh/siu_pcm.c
View File

@ -32,7 +32,7 @@
#include <sound/pcm_params.h>
#include <sound/soc-dai.h>
#include <asm/dma-sh.h>
#include <asm/dmaengine.h>
#include <asm/siu.h>
#include "siu.h"