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Diffstat (limited to 'arch/arm/mach-msm/dma.c')
-rw-r--r--arch/arm/mach-msm/dma.c66
1 files changed, 59 insertions, 7 deletions
diff --git a/arch/arm/mach-msm/dma.c b/arch/arm/mach-msm/dma.c
index f5420f9585c..fb976246471 100644
--- a/arch/arm/mach-msm/dma.c
+++ b/arch/arm/mach-msm/dma.c
@@ -13,12 +13,42 @@
*
*/
+#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/io.h>
#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/module.h>
#include <mach/dma.h>
+#include <mach/msm_iomap.h>
#define MSM_DMOV_CHANNEL_COUNT 16
+#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))
+
+#if defined(CONFIG_ARCH_MSM7X30)
+#define DMOV_SD_AARM DMOV_SD2
+#else
+#define DMOV_SD_AARM DMOV_SD3
+#endif
+
+#define DMOV_CMD_PTR(ch) DMOV_SD_AARM(0x000, ch)
+#define DMOV_RSLT(ch) DMOV_SD_AARM(0x040, ch)
+#define DMOV_FLUSH0(ch) DMOV_SD_AARM(0x080, ch)
+#define DMOV_FLUSH1(ch) DMOV_SD_AARM(0x0C0, ch)
+#define DMOV_FLUSH2(ch) DMOV_SD_AARM(0x100, ch)
+#define DMOV_FLUSH3(ch) DMOV_SD_AARM(0x140, ch)
+#define DMOV_FLUSH4(ch) DMOV_SD_AARM(0x180, ch)
+#define DMOV_FLUSH5(ch) DMOV_SD_AARM(0x1C0, ch)
+
+#define DMOV_STATUS(ch) DMOV_SD_AARM(0x200, ch)
+#define DMOV_ISR DMOV_SD_AARM(0x380, 0)
+
+#define DMOV_CONFIG(ch) DMOV_SD_AARM(0x300, ch)
+
enum {
MSM_DMOV_PRINT_ERRORS = 1,
MSM_DMOV_PRINT_IO = 2,
@@ -26,6 +56,7 @@ enum {
};
static DEFINE_SPINLOCK(msm_dmov_lock);
+static struct clk *msm_dmov_clk;
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];
@@ -47,6 +78,7 @@ void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
{
writel((graceful << 31), DMOV_FLUSH0(id));
}
+EXPORT_SYMBOL_GPL(msm_dmov_stop_cmd);
void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
{
@@ -54,6 +86,9 @@ void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
unsigned int status;
spin_lock_irqsave(&msm_dmov_lock, irq_flags);
+ if (!channel_active)
+ clk_enable(msm_dmov_clk);
+ dsb();
status = readl(DMOV_STATUS(id));
if (list_empty(&ready_commands[id]) &&
(status & DMOV_STATUS_CMD_PTR_RDY)) {
@@ -63,6 +98,8 @@ void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
}
#endif
+ if (cmd->execute_func)
+ cmd->execute_func(cmd);
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)
@@ -70,6 +107,8 @@ void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
channel_active |= 1U << id;
writel(cmd->cmdptr, DMOV_CMD_PTR(id));
} else {
+ if (!channel_active)
+ clk_disable(msm_dmov_clk);
if (list_empty(&active_commands[id]))
PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);
@@ -78,6 +117,7 @@ void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
}
spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
}
+EXPORT_SYMBOL_GPL(msm_dmov_enqueue_cmd);
struct msm_dmov_exec_cmdptr_cmd {
struct msm_dmov_cmd dmov_cmd;
@@ -108,6 +148,7 @@ int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
cmd.dmov_cmd.cmdptr = cmdptr;
cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
+ cmd.dmov_cmd.execute_func = NULL;
cmd.id = id;
init_completion(&cmd.complete);
@@ -165,6 +206,7 @@ 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);
+ dsb();
cmd->complete_func(cmd, ch_result, NULL);
}
}
@@ -181,6 +223,7 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
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);
+ dsb();
cmd->complete_func(cmd, ch_result, &errdata);
}
}
@@ -198,6 +241,7 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
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);
+ dsb();
cmd->complete_func(cmd, ch_result, &errdata);
}
/* this does not seem to work, once we get an error */
@@ -208,8 +252,9 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_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]);
+ list_move_tail(&cmd->list, &active_commands[id]);
+ if (cmd->execute_func)
+ cmd->execute_func(cmd);
PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
writel(cmd->cmdptr, DMOV_CMD_PTR(id));
}
@@ -219,8 +264,10 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
}
- if (!channel_active)
- disable_irq(INT_ADM_AARM);
+ if (!channel_active) {
+ disable_irq_nosync(INT_ADM_AARM);
+ clk_disable(msm_dmov_clk);
+ }
spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
return IRQ_HANDLED;
@@ -230,17 +277,22 @@ static int __init msm_init_datamover(void)
{
int i;
int ret;
+ struct clk *clk;
+
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));
}
+ clk = clk_get(NULL, "adm_clk");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ clk_prepare(clk);
+ msm_dmov_clk = clk;
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);
-
+module_init(msm_init_datamover);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 19:31:33 +0000