1 files changed, 111 insertions, 27 deletions

diff --git a/arch/arm/mach-msm/dma.c b/arch/arm/mach-msm/dma.c
index 8b0f339b327..fb976246471 100644
--- a/arch/arm/mach-msm/dma.c
+++ b/arch/arm/mach-msm/dma.c
@@ -13,12 +13,42 @@
  *
  */
 
-#include <asm/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
 #include <linux/interrupt.h>
-#include <asm/arch/dma.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,
@@ -26,7 +56,8 @@ enum {
 };
 
 static DEFINE_SPINLOCK(msm_dmov_lock);
-static struct msm_dmov_cmd active_command;
+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];
 unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
@@ -43,12 +74,21 @@ 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));
+}
+EXPORT_SYMBOL_GPL(msm_dmov_stop_cmd);
+
 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);
+	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)) {
@@ -58,10 +98,17 @@ 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)
+			enable_irq(INT_ADM_AARM);
+		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);
 
@@ -70,27 +117,26 @@ 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;
 	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);
 }
 
@@ -102,6 +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);
 
@@ -111,7 +158,7 @@ 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 +206,43 @@ 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);
+					dsb();
+					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);
+					dsb();
+					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);
+					dsb();
+					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 */
@@ -187,14 +252,23 @@ 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));
 			}
 		} 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_nosync(INT_ADM_AARM);
+		clk_disable(msm_dmov_clk);
+	}
+
 	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
 	return IRQ_HANDLED;
 }
@@ -202,13 +276,23 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
 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));
 	}
-	return request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
+	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);