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Diffstat (limited to 'arch/arm/mach-msm/dma.c')
-rw-r--r--arch/arm/mach-msm/dma.c72
1 files changed, 52 insertions, 20 deletions
diff --git a/arch/arm/mach-msm/dma.c b/arch/arm/mach-msm/dma.c
index 0c8f252..f5420f9 100644
--- a/arch/arm/mach-msm/dma.c
+++ b/arch/arm/mach-msm/dma.c
@@ -26,7 +26,7 @@ enum {
};
static DEFINE_SPINLOCK(msm_dmov_lock);
-static struct msm_dmov_cmd active_command;
+static unsigned int channel_active;
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;
@@ -43,6 +43,11 @@ unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
#define PRINT_FLOW(format, args...) \
MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
+void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
+{
+ writel((graceful << 31), DMOV_FLUSH0(id));
+}
+
void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
{
unsigned long irq_flags;
@@ -60,6 +65,9 @@ void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
#endif
PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
list_add_tail(&cmd->list, &active_commands[id]);
+ if (!channel_active)
+ enable_irq(INT_ADM_AARM);
+ channel_active |= 1U << id;
writel(cmd->cmdptr, DMOV_CMD_PTR(id));
} else {
if (list_empty(&active_commands[id]))
@@ -76,21 +84,19 @@ struct msm_dmov_exec_cmdptr_cmd {
struct completion complete;
unsigned id;
unsigned int result;
- unsigned int flush[6];
+ struct msm_dmov_errdata err;
};
-static void dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd, unsigned int result)
+static void
+dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd,
+ unsigned int result,
+ struct msm_dmov_errdata *err)
{
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));
- }
+ if (result != 0x80000002 && err)
+ memcpy(&cmd->err, err, sizeof(struct msm_dmov_errdata));
+
complete(&cmd->complete);
}
@@ -111,7 +117,7 @@ int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
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]);
+ id, cmd.err.flush[0], cmd.err.flush[1], cmd.err.flush[2], cmd.err.flush[3]);
return -EIO;
}
PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
@@ -159,25 +165,40 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
"for %p, result %x\n", id, cmd, ch_result);
if (cmd) {
list_del(&cmd->list);
- cmd->complete_func(cmd, ch_result);
+ cmd->complete_func(cmd, ch_result, NULL);
}
}
if (ch_result & DMOV_RSLT_FLUSH) {
- unsigned int flush0 = readl(DMOV_FLUSH0(id));
+ struct msm_dmov_errdata errdata;
+
+ errdata.flush[0] = readl(DMOV_FLUSH0(id));
+ errdata.flush[1] = readl(DMOV_FLUSH1(id));
+ errdata.flush[2] = readl(DMOV_FLUSH2(id));
+ errdata.flush[3] = readl(DMOV_FLUSH3(id));
+ errdata.flush[4] = readl(DMOV_FLUSH4(id));
+ errdata.flush[5] = readl(DMOV_FLUSH5(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);
+ PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
if (cmd) {
list_del(&cmd->list);
- cmd->complete_func(cmd, ch_result);
+ cmd->complete_func(cmd, ch_result, &errdata);
}
}
if (ch_result & DMOV_RSLT_ERROR) {
- unsigned int flush0 = readl(DMOV_FLUSH0(id));
+ struct msm_dmov_errdata errdata;
+
+ errdata.flush[0] = readl(DMOV_FLUSH0(id));
+ errdata.flush[1] = readl(DMOV_FLUSH1(id));
+ errdata.flush[2] = readl(DMOV_FLUSH2(id));
+ errdata.flush[3] = readl(DMOV_FLUSH3(id));
+ errdata.flush[4] = readl(DMOV_FLUSH4(id));
+ errdata.flush[5] = readl(DMOV_FLUSH5(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);
+ PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
if (cmd) {
list_del(&cmd->list);
- cmd->complete_func(cmd, ch_result);
+ cmd->complete_func(cmd, ch_result, &errdata);
}
/* this does not seem to work, once we get an error */
/* the datamover will no longer accept commands */
@@ -193,8 +214,14 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
writel(cmd->cmdptr, DMOV_CMD_PTR(id));
}
} while (ch_status & DMOV_STATUS_RSLT_VALID);
+ if (list_empty(&active_commands[id]) && list_empty(&ready_commands[id]))
+ channel_active &= ~(1U << id);
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
}
+
+ if (!channel_active)
+ disable_irq(INT_ADM_AARM);
+
spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
return IRQ_HANDLED;
}
@@ -202,12 +229,17 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
static int __init msm_init_datamover(void)
{
int i;
+ int ret;
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);
+ ret = request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
+ if (ret)
+ return ret;
+ disable_irq(INT_ADM_AARM);
+ return 0;
}
arch_initcall(msm_init_datamover);
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