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[ARM] msm: dma support for MSM7X00A 

Signed-off-by: Brian Swetland <swetland@google.com>
This commit is contained in:
Arve Hjønnevåg 2007-11-26 04:12:29 -08:00 committed by Russell King
parent 9e73c84c89
commit bfe645adf1
3 changed files with 365 additions and 1 deletions
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2
arch/arm/mach-msm/Makefile
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@ -1,4 +1,4 @@
obj-y += io.o idle.o irq.o timer.o
obj-y += io.o idle.o irq.o timer.o dma.o
# Common code for board init
obj-y += common.o

214
arch/arm/mach-msm/dma.c Normal file
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@ -0,0 +1,214 @@
/* linux/arch/arm/mach-msm/dma.c
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <asm/io.h>
#include <linux/interrupt.h>
#include <asm/arch/dma.h>
#define MSM_DMOV_CHANNEL_COUNT 16
enum {
MSM_DMOV_PRINT_ERRORS = 1,
MSM_DMOV_PRINT_IO = 2,
MSM_DMOV_PRINT_FLOW = 4
};
static DEFINE_SPINLOCK(msm_dmov_lock);
static struct msm_dmov_cmd active_command;
static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
#define MSM_DMOV_DPRINTF(mask, format, args...) \
do { \
if ((mask) & msm_dmov_print_mask) \
printk(KERN_ERR format, args); \
} while (0)
#define PRINT_ERROR(format, args...) \
MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
#define PRINT_IO(format, args...) \
MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
#define PRINT_FLOW(format, args...) \
MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
{
unsigned long irq_flags;
unsigned int status;
spin_lock_irqsave(&msm_dmov_lock, irq_flags);
status = readl(DMOV_STATUS(id));
if (list_empty(&ready_commands[id]) &&
(status & DMOV_STATUS_CMD_PTR_RDY)) {
#if 0
if (list_empty(&active_commands[id])) {
PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);
writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
}
#endif
PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
list_add_tail(&cmd->list, &active_commands[id]);
writel(cmd->cmdptr, DMOV_CMD_PTR(id));
} else {
if (list_empty(&active_commands[id]))
PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);
PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);
list_add_tail(&cmd->list, &ready_commands[id]);
}
spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
}
struct msm_dmov_exec_cmdptr_cmd {
struct msm_dmov_cmd dmov_cmd;
struct completion complete;
unsigned id;
unsigned int result;
unsigned int flush[6];
};
static void dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd, unsigned int result)
{
struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);
cmd->result = result;
if (result != 0x80000002) {
cmd->flush[0] = readl(DMOV_FLUSH0(cmd->id));
cmd->flush[1] = readl(DMOV_FLUSH1(cmd->id));
cmd->flush[2] = readl(DMOV_FLUSH2(cmd->id));
cmd->flush[3] = readl(DMOV_FLUSH3(cmd->id));
cmd->flush[4] = readl(DMOV_FLUSH4(cmd->id));
cmd->flush[5] = readl(DMOV_FLUSH5(cmd->id));
}
complete(&cmd->complete);
}
int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
{
struct msm_dmov_exec_cmdptr_cmd cmd;
PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);
cmd.dmov_cmd.cmdptr = cmdptr;
cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
cmd.id = id;
init_completion(&cmd.complete);
msm_dmov_enqueue_cmd(id, &cmd.dmov_cmd);
wait_for_completion(&cmd.complete);
if (cmd.result != 0x80000002) {
PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);
PRINT_ERROR("dmov_exec_cmdptr(%d): flush: %x %x %x %x\n",
id, cmd.flush[0], cmd.flush[1], cmd.flush[2], cmd.flush[3]);
return -EIO;
}
PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
return 0;
}
static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
{
unsigned int int_status, mask, id;
unsigned long irq_flags;
unsigned int ch_status;
unsigned int ch_result;
struct msm_dmov_cmd *cmd;
spin_lock_irqsave(&msm_dmov_lock, irq_flags);
int_status = readl(DMOV_ISR); /* read and clear interrupt */
PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);
while (int_status) {
mask = int_status & -int_status;
id = fls(mask) - 1;
PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
int_status &= ~mask;
ch_status = readl(DMOV_STATUS(id));
if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);
continue;
}
do {
ch_result = readl(DMOV_RSLT(id));
if (list_empty(&active_commands[id])) {
PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
"with no active command, status %x, result %x\n",
id, ch_status, ch_result);
cmd = NULL;
} else
cmd = list_entry(active_commands[id].next, typeof(*cmd), list);
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
if (ch_result & DMOV_RSLT_DONE) {
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
id, ch_status);
PRINT_IO("msm_datamover_irq_handler id %d, got result "
"for %p, result %x\n", id, cmd, ch_result);
if (cmd) {
list_del(&cmd->list);
cmd->complete_func(cmd, ch_result);
}
}
if (ch_result & DMOV_RSLT_FLUSH) {
unsigned int flush0 = readl(DMOV_FLUSH0(id));
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, flush0);
if (cmd) {
list_del(&cmd->list);
cmd->complete_func(cmd, ch_result);
}
}
if (ch_result & DMOV_RSLT_ERROR) {
unsigned int flush0 = readl(DMOV_FLUSH0(id));
PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, flush0);
if (cmd) {
list_del(&cmd->list);
cmd->complete_func(cmd, ch_result);
}
/* this does not seem to work, once we get an error */
/* the datamover will no longer accept commands */
writel(0, DMOV_FLUSH0(id));
}
ch_status = readl(DMOV_STATUS(id));
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
list_del(&cmd->list);
list_add_tail(&cmd->list, &active_commands[id]);
PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
writel(cmd->cmdptr, DMOV_CMD_PTR(id));
}
} while (ch_status & DMOV_STATUS_RSLT_VALID);
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
}
spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
return IRQ_HANDLED;
}
static int __init msm_init_datamover(void)
{
int i;
for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
INIT_LIST_HEAD(&ready_commands[i]);
INIT_LIST_HEAD(&active_commands[i]);
writel(DMOV_CONFIG_IRQ_EN | DMOV_CONFIG_FORCE_TOP_PTR_RSLT | DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));
}
return request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
}
arch_initcall(msm_init_datamover);

150
include/asm-arm/arch-msm/dma.h
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@ -1 +1,151 @@
/* linux/include/asm-arm/arch-msm/dma.h
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __ASM_ARCH_MSM_DMA_H
#include <linux/list.h>
#include <asm/arch/msm_iomap.h>
struct msm_dmov_cmd {
struct list_head list;
unsigned int cmdptr;
void (*complete_func)(struct msm_dmov_cmd *cmd, unsigned int result);
/* void (*user_result_func)(struct msm_dmov_cmd *cmd); */
};
void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd);
void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd);
int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr);
/* int msm_dmov_exec_cmd_etc(unsigned id, unsigned int cmdptr, int timeout, int interruptible); */
#define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))
#define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))
#define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))
#define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))
/* only security domain 3 is available to the ARM11
* SD0 -> mARM trusted, SD1 -> mARM nontrusted, SD2 -> aDSP, SD3 -> aARM
*/
#define DMOV_CMD_PTR(ch) DMOV_SD3(0x000, ch)
#define DMOV_CMD_LIST (0 << 29) /* does not work */
#define DMOV_CMD_PTR_LIST (1 << 29) /* works */
#define DMOV_CMD_INPUT_CFG (2 << 29) /* untested */
#define DMOV_CMD_OUTPUT_CFG (3 << 29) /* untested */
#define DMOV_CMD_ADDR(addr) ((addr) >> 3)
#define DMOV_RSLT(ch) DMOV_SD3(0x040, ch)
#define DMOV_RSLT_VALID (1 << 31) /* 0 == host has empties result fifo */
#define DMOV_RSLT_ERROR (1 << 3)
#define DMOV_RSLT_FLUSH (1 << 2)
#define DMOV_RSLT_DONE (1 << 1) /* top pointer done */
#define DMOV_RSLT_USER (1 << 0) /* command with FR force result */
#define DMOV_FLUSH0(ch) DMOV_SD3(0x080, ch)
#define DMOV_FLUSH1(ch) DMOV_SD3(0x0C0, ch)
#define DMOV_FLUSH2(ch) DMOV_SD3(0x100, ch)
#define DMOV_FLUSH3(ch) DMOV_SD3(0x140, ch)
#define DMOV_FLUSH4(ch) DMOV_SD3(0x180, ch)
#define DMOV_FLUSH5(ch) DMOV_SD3(0x1C0, ch)
#define DMOV_STATUS(ch) DMOV_SD3(0x200, ch)
#define DMOV_STATUS_RSLT_COUNT(n) (((n) >> 29))
#define DMOV_STATUS_CMD_COUNT(n) (((n) >> 27) & 3)
#define DMOV_STATUS_RSLT_VALID (1 << 1)
#define DMOV_STATUS_CMD_PTR_RDY (1 << 0)
#define DMOV_ISR DMOV_SD3(0x380, 0)
#define DMOV_CONFIG(ch) DMOV_SD3(0x300, ch)
#define DMOV_CONFIG_FORCE_TOP_PTR_RSLT (1 << 2)
#define DMOV_CONFIG_FORCE_FLUSH_RSLT (1 << 1)
#define DMOV_CONFIG_IRQ_EN (1 << 0)
/* channel assignments */
#define DMOV_NAND_CHAN 7
#define DMOV_NAND_CRCI_CMD 5
#define DMOV_NAND_CRCI_DATA 4
#define DMOV_SDC1_CHAN 8
#define DMOV_SDC1_CRCI 6
#define DMOV_SDC2_CHAN 8
#define DMOV_SDC2_CRCI 7
#define DMOV_TSIF_CHAN 10
#define DMOV_TSIF_CRCI 10
#define DMOV_USB_CHAN 11
/* no client rate control ifc (eg, ram) */
#define DMOV_NONE_CRCI 0
/* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover
* is going to walk a list of 32bit pointers as described below. Each
* pointer points to a *array* of dmov_s, etc structs. The last pointer
* in the list is marked with CMD_PTR_LP. The last struct in each array
* is marked with CMD_LC (see below).
*/
#define CMD_PTR_ADDR(addr) ((addr) >> 3)
#define CMD_PTR_LP (1 << 31) /* last pointer */
#define CMD_PTR_PT (3 << 29) /* ? */
/* Single Item Mode */
typedef struct {
unsigned cmd;
unsigned src;
unsigned dst;
unsigned len;
} dmov_s;
/* Scatter/Gather Mode */
typedef struct {
unsigned cmd;
unsigned src_dscr;
unsigned dst_dscr;
unsigned _reserved;
} dmov_sg;
/* bits for the cmd field of the above structures */
#define CMD_LC (1 << 31) /* last command */
#define CMD_FR (1 << 22) /* force result -- does not work? */
#define CMD_OCU (1 << 21) /* other channel unblock */
#define CMD_OCB (1 << 20) /* other channel block */
#define CMD_TCB (1 << 19) /* ? */
#define CMD_DAH (1 << 18) /* destination address hold -- does not work?*/
#define CMD_SAH (1 << 17) /* source address hold -- does not work? */
#define CMD_MODE_SINGLE (0 << 0) /* dmov_s structure used */
#define CMD_MODE_SG (1 << 0) /* untested */
#define CMD_MODE_IND_SG (2 << 0) /* untested */
#define CMD_MODE_BOX (3 << 0) /* untested */
#define CMD_DST_SWAP_BYTES (1 << 14) /* exchange each byte n with byte n+1 */
#define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */
#define CMD_DST_SWAP_WORDS (1 << 16) /* exchange each word n with word n+1 */
#define CMD_SRC_SWAP_BYTES (1 << 11) /* exchange each byte n with byte n+1 */
#define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */
#define CMD_SRC_SWAP_WORDS (1 << 13) /* exchange each word n with word n+1 */
#define CMD_DST_CRCI(n) (((n) & 15) << 7)
#define CMD_SRC_CRCI(n) (((n) & 15) << 3)
#endif