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path: root/drivers/sh/maple/maple.c
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Diffstat (limited to 'drivers/sh/maple/maple.c')
-rw-r--r--drivers/sh/maple/maple.c66
1 files changed, 43 insertions, 23 deletions
diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c
index 9cfcfd8dad5..617efb1640b 100644
--- a/drivers/sh/maple/maple.c
+++ b/drivers/sh/maple/maple.c
@@ -1,7 +1,7 @@
/*
* Core maple bus functionality
*
- * Copyright (C) 2007 Adrian McMenamin
+ * Copyright (C) 2007, 2008 Adrian McMenamin
*
* Based on 2.4 code by:
*
@@ -18,7 +18,6 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
-#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/io.h>
@@ -54,7 +53,7 @@ static struct device maple_bus;
static int subdevice_map[MAPLE_PORTS];
static unsigned long *maple_sendbuf, *maple_sendptr, *maple_lastptr;
static unsigned long maple_pnp_time;
-static int started, scanning, liststatus, realscan;
+static int started, scanning, liststatus, fullscan;
static struct kmem_cache *maple_queue_cache;
struct maple_device_specify {
@@ -62,6 +61,9 @@ struct maple_device_specify {
int unit;
};
+static bool checked[4];
+static struct maple_device *baseunits[4];
+
/**
* maple_driver_register - register a device driver
* automatically makes the driver bus a maple bus
@@ -309,11 +311,9 @@ static void maple_attach_driver(struct maple_device *mdev)
else
break;
- if (realscan) {
- printk(KERN_INFO "Maple device detected: %s\n",
- mdev->product_name);
- printk(KERN_INFO "Maple device: %s\n", mdev->product_licence);
- }
+ printk(KERN_INFO "Maple device detected: %s\n",
+ mdev->product_name);
+ printk(KERN_INFO "Maple device: %s\n", mdev->product_licence);
function = be32_to_cpu(mdev->devinfo.function);
@@ -323,10 +323,9 @@ static void maple_attach_driver(struct maple_device *mdev)
mdev->driver = &maple_dummy_driver;
sprintf(mdev->dev.bus_id, "%d:0.port", mdev->port);
} else {
- if (realscan)
- printk(KERN_INFO
- "Maple bus at (%d, %d): Function 0x%lX\n",
- mdev->port, mdev->unit, function);
+ printk(KERN_INFO
+ "Maple bus at (%d, %d): Function 0x%lX\n",
+ mdev->port, mdev->unit, function);
matched =
bus_for_each_drv(&maple_bus_type, NULL, mdev,
@@ -334,9 +333,8 @@ static void maple_attach_driver(struct maple_device *mdev)
if (matched == 0) {
/* Driver does not exist yet */
- if (realscan)
- printk(KERN_INFO
- "No maple driver found.\n");
+ printk(KERN_INFO
+ "No maple driver found.\n");
mdev->driver = &maple_dummy_driver;
}
sprintf(mdev->dev.bus_id, "%d:0%d.%lX", mdev->port,
@@ -472,9 +470,12 @@ static void maple_response_none(struct maple_device *mdev,
maple_detach_driver(mdev);
return;
}
- if (!started) {
- printk(KERN_INFO "No maple devices attached to port %d\n",
- mdev->port);
+ if (!started || !fullscan) {
+ if (checked[mdev->port] == false) {
+ checked[mdev->port] = true;
+ printk(KERN_INFO "No maple devices attached"
+ " to port %d\n", mdev->port);
+ }
return;
}
maple_clean_submap(mdev);
@@ -485,8 +486,14 @@ static void maple_response_devinfo(struct maple_device *mdev,
char *recvbuf)
{
char submask;
- if ((!started) || (scanning == 2)) {
- maple_attach_driver(mdev);
+ if (!started || (scanning == 2) || !fullscan) {
+ if ((mdev->unit == 0) && (checked[mdev->port] == false)) {
+ checked[mdev->port] = true;
+ maple_attach_driver(mdev);
+ } else {
+ if (mdev->unit != 0)
+ maple_attach_driver(mdev);
+ }
return;
}
if (mdev->unit == 0) {
@@ -505,6 +512,7 @@ static void maple_dma_handler(struct work_struct *work)
struct maple_device *dev;
char *recvbuf;
enum maple_code code;
+ int i;
if (!maple_dma_done())
return;
@@ -557,6 +565,19 @@ static void maple_dma_handler(struct work_struct *work)
} else
scanning = 0;
+ if (!fullscan) {
+ fullscan = 1;
+ for (i = 0; i < MAPLE_PORTS; i++) {
+ if (checked[i] == false) {
+ fullscan = 0;
+ dev = baseunits[i];
+ dev->mq->command =
+ MAPLE_COMMAND_DEVINFO;
+ dev->mq->length = 0;
+ maple_add_packet(dev->mq);
+ }
+ }
+ }
if (started == 0)
started = 1;
}
@@ -694,7 +715,9 @@ static int __init maple_bus_init(void)
/* setup maple ports */
for (i = 0; i < MAPLE_PORTS; i++) {
+ checked[i] = false;
mdev[i] = maple_alloc_dev(i, 0);
+ baseunits[i] = mdev[i];
if (!mdev[i]) {
while (i-- > 0)
maple_free_dev(mdev[i]);
@@ -703,12 +726,9 @@ static int __init maple_bus_init(void)
mdev[i]->mq->command = MAPLE_COMMAND_DEVINFO;
mdev[i]->mq->length = 0;
maple_add_packet(mdev[i]->mq);
- /* delay aids hardware detection */
- mdelay(5);
subdevice_map[i] = 0;
}
- realscan = 1;
/* setup maplebus hardware */
maplebus_dma_reset();
/* initial detection */