tifm: hide details of interrupt processing from socket drivers

Instead of passing transformed value of adapter interrupt status to
socket drivers, implement two separate callbacks - one for card events
and another for dma events.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

3 files changed, 48 insertions, 28 deletions

diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index bc60e2fc3c2..d6652b3301d 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -14,7 +14,13 @@
 #include <linux/freezer.h>
 
 #define DRIVER_NAME "tifm_7xx1"
-#define DRIVER_VERSION "0.7"
+#define DRIVER_VERSION "0.8"
+
+#define TIFM_IRQ_ENABLE           0x80000000
+#define TIFM_IRQ_SOCKMASK(x)      (x)
+#define TIFM_IRQ_CARDMASK(x)      ((x) << 8)
+#define TIFM_IRQ_FIFOMASK(x)      ((x) << 16)
+#define TIFM_IRQ_SETALL           0xffffffff
 
 static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
 {
@@ -31,7 +37,7 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
 	struct tifm_adapter *fm = dev_id;
 	struct tifm_dev *sock;
 	unsigned int irq_status;
-	unsigned int sock_irq_status, cnt;
+	unsigned int cnt;
 
 	spin_lock(&fm->lock);
 	irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
@@ -45,12 +51,12 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
 
 		for (cnt = 0; cnt < fm->num_sockets; cnt++) {
 			sock = fm->sockets[cnt];
-			sock_irq_status = (irq_status >> cnt)
-					  & (TIFM_IRQ_FIFOMASK(1)
-					     | TIFM_IRQ_CARDMASK(1));
-
-			if (sock && sock_irq_status)
-				sock->signal_irq(sock, sock_irq_status);
+			if (sock) {
+				if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
+					sock->data_event(sock);
+				if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
+					sock->card_event(sock);
+			}
 		}
 
 		fm->socket_change_set |= irq_status
diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index 6b10ebe9d93..6799b9cca05 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -14,7 +14,7 @@
 #include <linux/idr.h>
 
 #define DRIVER_NAME "tifm_core"
-#define DRIVER_VERSION "0.7"
+#define DRIVER_VERSION "0.8"
 
 static DEFINE_IDR(tifm_adapter_idr);
 static DEFINE_SPINLOCK(tifm_adapter_lock);
@@ -175,8 +175,7 @@ void tifm_free_device(struct device *dev)
 }
 EXPORT_SYMBOL(tifm_free_device);
 
-static void tifm_dummy_signal_irq(struct tifm_dev *sock,
-				  unsigned int sock_irq_status)
+static void tifm_dummy_event(struct tifm_dev *sock)
 {
 	return;
 }
@@ -191,7 +190,8 @@ struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm)
 		dev->dev.parent = fm->dev;
 		dev->dev.bus = &tifm_bus_type;
 		dev->dev.release = tifm_free_device;
-		dev->signal_irq = tifm_dummy_signal_irq;
+		dev->card_event = tifm_dummy_event;
+		dev->data_event = tifm_dummy_event;
 	}
 	return dev;
 }
@@ -249,7 +249,8 @@ static int tifm_device_remove(struct device *dev)
 	struct tifm_driver *drv = fm_dev->drv;
 
 	if (drv) {
-		fm_dev->signal_irq = tifm_dummy_signal_irq;
+		fm_dev->card_event = tifm_dummy_event;
+		fm_dev->data_event = tifm_dummy_event;
 		if (drv->remove)
 			drv->remove(fm_dev);
 		fm_dev->drv = NULL;
diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c
index 0581d09c58f..8905b129e4e 100644
--- a/drivers/mmc/tifm_sd.c
+++ b/drivers/mmc/tifm_sd.c
@@ -17,7 +17,7 @@
 #include <asm/io.h>
 
 #define DRIVER_NAME "tifm_sd"
-#define DRIVER_VERSION "0.7"
+#define DRIVER_VERSION "0.8"
 
 static int no_dma = 0;
 static int fixed_timeout = 0;
@@ -316,24 +316,38 @@ change_state:
 }
 
 /* Called from interrupt handler */
-static void tifm_sd_signal_irq(struct tifm_dev *sock,
-			       unsigned int sock_irq_status)
+static void tifm_sd_data_event(struct tifm_dev *sock)
 {
 	struct tifm_sd *host;
-	unsigned int host_status = 0, fifo_status = 0;
-	int error_code = 0;
+	unsigned int fifo_status = 0;
 
 	spin_lock(&sock->lock);
 	host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
 
-	if (sock_irq_status & FIFO_EVENT) {
-		fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
-		writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
+	fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
+	writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
+
+	host->flags |= fifo_status & FIFO_RDY;
+
+	if (host->req)
+		tifm_sd_process_cmd(sock, host, 0);
+
+	dev_dbg(&sock->dev, "fifo_status %x\n", fifo_status);
+	spin_unlock(&sock->lock);
+
+}
+
+/* Called from interrupt handler */
+static void tifm_sd_card_event(struct tifm_dev *sock)
+{
+	struct tifm_sd *host;
+	unsigned int host_status = 0;
+	int error_code = 0;
+
+	spin_lock(&sock->lock);
+	host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
 
-		host->flags |= fifo_status & FIFO_RDY;
-	}
 
-	if (sock_irq_status & CARD_EVENT) {
 		host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
 		writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
 
@@ -377,13 +391,11 @@ static void tifm_sd_signal_irq(struct tifm_dev *sock,
 			host->written_blocks++;
 			host->flags &= ~CARD_BUSY;
 		}
-        }
 
 	if (host->req)
 		tifm_sd_process_cmd(sock, host, host_status);
 done:
-	dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n",
-		host_status, fifo_status);
+	dev_dbg(&sock->dev, "host_status %x\n", host_status);
 	spin_unlock(&sock->lock);
 }
 
@@ -882,7 +894,8 @@ static int tifm_sd_probe(struct tifm_dev *sock)
 	mmc->max_blk_size = 2048;
 	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
 	mmc->max_seg_size = mmc->max_req_size;
-	sock->signal_irq = tifm_sd_signal_irq;
+	sock->card_event = tifm_sd_card_event;
+	sock->data_event = tifm_sd_data_event;
 	rc = tifm_sd_initialize_host(host);
 
 	if (!rc)