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Diffstat (limited to 'drivers/macintosh/adb.c')
-rw-r--r--drivers/macintosh/adb.c122
1 files changed, 75 insertions, 47 deletions
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 04a50498f257..88adee42ba82 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Device driver for the Apple Desktop Bus
* and the /dev/adb device on macintoshes.
@@ -23,7 +24,7 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/mm.h>
-#include <linux/sched.h>
+#include <linux/sched/signal.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
@@ -37,10 +38,10 @@
#include <linux/kthread.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
+#include <linux/of.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#ifdef CONFIG_PPC
-#include <asm/prom.h>
#include <asm/machdep.h>
#endif
@@ -48,7 +49,6 @@
EXPORT_SYMBOL(adb_client_list);
extern struct adb_driver via_macii_driver;
-extern struct adb_driver via_maciisi_driver;
extern struct adb_driver via_cuda_driver;
extern struct adb_driver adb_iop_driver;
extern struct adb_driver via_pmu_driver;
@@ -59,16 +59,13 @@ static struct adb_driver *adb_driver_list[] = {
#ifdef CONFIG_ADB_MACII
&via_macii_driver,
#endif
-#ifdef CONFIG_ADB_MACIISI
- &via_maciisi_driver,
-#endif
#ifdef CONFIG_ADB_CUDA
&via_cuda_driver,
#endif
#ifdef CONFIG_ADB_IOP
&adb_iop_driver,
#endif
-#if defined(CONFIG_ADB_PMU) || defined(CONFIG_ADB_PMU68K)
+#ifdef CONFIG_ADB_PMU
&via_pmu_driver,
#endif
#ifdef CONFIG_ADB_MACIO
@@ -77,13 +74,15 @@ static struct adb_driver *adb_driver_list[] = {
NULL
};
-static struct class *adb_dev_class;
+static const struct class adb_dev_class = {
+ .name = "adb",
+};
static struct adb_driver *adb_controller;
BLOCKING_NOTIFIER_HEAD(adb_client_list);
static int adb_got_sleep;
static int adb_inited;
-static DEFINE_SEMAPHORE(adb_probe_mutex);
+static DEFINE_SEMAPHORE(adb_probe_mutex, 1);
static int sleepy_trackpad;
static int autopoll_devs;
int __adb_probe_sync;
@@ -166,7 +165,7 @@ static int adb_scan_bus(void)
* See if anybody actually moved. This is suggested
* by HW TechNote 01:
*
- * http://developer.apple.com/technotes/hw/hw_01.html
+ * https://developer.apple.com/technotes/hw/hw_01.html
*/
adb_request(&req, NULL, ADBREQ_SYNC | ADBREQ_REPLY, 1,
(highFree << 4) | 0xf);
@@ -193,8 +192,7 @@ static int adb_scan_bus(void)
break;
noMovement = 0;
- }
- else {
+ } else {
/*
* No devices left at address i; move the
* one(s) we moved to `highFree' back to i.
@@ -207,18 +205,17 @@ static int adb_scan_bus(void)
}
/* Now fill in the handler_id field of the adb_handler entries. */
- printk(KERN_DEBUG "adb devices:");
for (i = 1; i < 16; i++) {
if (adb_handler[i].original_address == 0)
continue;
adb_request(&req, NULL, ADBREQ_SYNC | ADBREQ_REPLY, 1,
(i << 4) | 0xf);
adb_handler[i].handler_id = req.reply[2];
- printk(" [%d]: %d %x", i, adb_handler[i].original_address,
+ printk(KERN_DEBUG "adb device [%d]: %d 0x%X\n", i,
+ adb_handler[i].original_address,
adb_handler[i].handler_id);
devmask |= 1 << i;
}
- printk("\n");
return devmask;
}
@@ -229,9 +226,9 @@ static int adb_scan_bus(void)
static int
adb_probe_task(void *x)
{
- printk(KERN_INFO "adb: starting probe task...\n");
+ pr_debug("adb: starting probe task...\n");
do_adb_reset_bus();
- printk(KERN_INFO "adb: finished probe task...\n");
+ pr_debug("adb: finished probe task...\n");
up(&adb_probe_mutex);
@@ -263,7 +260,7 @@ adb_reset_bus(void)
/*
* notify clients before sleep
*/
-static int adb_suspend(struct platform_device *dev, pm_message_t state)
+static int __adb_suspend(struct platform_device *dev, pm_message_t state)
{
adb_got_sleep = 1;
/* We need to get a lock on the probe thread */
@@ -276,10 +273,25 @@ static int adb_suspend(struct platform_device *dev, pm_message_t state)
return 0;
}
+static int adb_suspend(struct device *dev)
+{
+ return __adb_suspend(to_platform_device(dev), PMSG_SUSPEND);
+}
+
+static int adb_freeze(struct device *dev)
+{
+ return __adb_suspend(to_platform_device(dev), PMSG_FREEZE);
+}
+
+static int adb_poweroff(struct device *dev)
+{
+ return __adb_suspend(to_platform_device(dev), PMSG_HIBERNATE);
+}
+
/*
* reset bus after sleep
*/
-static int adb_resume(struct platform_device *dev)
+static int __adb_resume(struct platform_device *dev)
{
adb_got_sleep = 0;
up(&adb_probe_mutex);
@@ -287,6 +299,11 @@ static int adb_resume(struct platform_device *dev)
return 0;
}
+
+static int adb_resume(struct device *dev)
+{
+ return __adb_resume(to_platform_device(dev));
+}
#endif /* CONFIG_PM */
static int __init adb_init(void)
@@ -321,7 +338,7 @@ static int __init adb_init(void)
adb_controller->init())
adb_controller = NULL;
if (adb_controller == NULL) {
- printk(KERN_WARNING "Warning: no ADB interface detected\n");
+ pr_warn("Warning: no ADB interface detected\n");
} else {
#ifdef CONFIG_PPC
if (of_machine_is_compatible("AAPL,PowerBook1998") ||
@@ -392,6 +409,7 @@ adb_poll(void)
return;
adb_controller->poll();
}
+EXPORT_SYMBOL(adb_poll);
static void adb_sync_req_done(struct adb_request *req)
{
@@ -441,6 +459,7 @@ adb_request(struct adb_request *req, void (*done)(struct adb_request *),
return rc;
}
+EXPORT_SYMBOL(adb_request);
/* Ultimately this should return the number of devices with
the given default id.
@@ -461,9 +480,8 @@ adb_register(int default_id, int handler_id, struct adb_ids *ids,
if ((adb_handler[i].original_address == default_id) &&
(!handler_id || (handler_id == adb_handler[i].handler_id) ||
try_handler_change(i, handler_id))) {
- if (adb_handler[i].handler != 0) {
- printk(KERN_ERR
- "Two handlers for ADB device %d\n",
+ if (adb_handler[i].handler) {
+ pr_err("Two handlers for ADB device %d\n",
default_id);
continue;
}
@@ -476,6 +494,7 @@ adb_register(int default_id, int handler_id, struct adb_ids *ids,
mutex_unlock(&adb_handler_mutex);
return ids->nids;
}
+EXPORT_SYMBOL(adb_register);
int
adb_unregister(int index)
@@ -497,12 +516,13 @@ adb_unregister(int index)
mutex_unlock(&adb_handler_mutex);
return ret;
}
+EXPORT_SYMBOL(adb_unregister);
void
adb_input(unsigned char *buf, int nb, int autopoll)
{
int i, id;
- static int dump_adb_input = 0;
+ static int dump_adb_input;
unsigned long flags;
void (*handler)(unsigned char *, int, int);
@@ -515,10 +535,10 @@ adb_input(unsigned char *buf, int nb, int autopoll)
id = buf[0] >> 4;
if (dump_adb_input) {
- printk(KERN_INFO "adb packet: ");
+ pr_info("adb packet: ");
for (i = 0; i < nb; ++i)
- printk(" %x", buf[i]);
- printk(", id = %d\n", id);
+ pr_cont(" %x", buf[i]);
+ pr_cont(", id = %d\n", id);
}
write_lock_irqsave(&adb_handler_lock, flags);
handler = adb_handler[id].handler;
@@ -561,8 +581,11 @@ adb_try_handler_change(int address, int new_id)
mutex_lock(&adb_handler_mutex);
ret = try_handler_change(address, new_id);
mutex_unlock(&adb_handler_mutex);
+ if (ret)
+ pr_debug("adb handler change: [%d] 0x%X\n", address, new_id);
return ret;
}
+EXPORT_SYMBOL(adb_try_handler_change);
int
adb_get_infos(int address, int *original_address, int *handler_id)
@@ -624,10 +647,9 @@ do_adb_query(struct adb_request *req)
{
int ret = -EINVAL;
- switch(req->data[1])
- {
+ switch(req->data[1]) {
case ADB_QUERY_GETDEVINFO:
- if (req->nbytes < 3)
+ if (req->nbytes < 3 || req->data[2] >= 16)
break;
mutex_lock(&adb_handler_mutex);
req->reply[0] = adb_handler[req->data[2]].original_address;
@@ -653,7 +675,7 @@ static int adb_open(struct inode *inode, struct file *file)
goto out;
}
state = kmalloc(sizeof(struct adbdev_state), GFP_KERNEL);
- if (state == 0) {
+ if (!state) {
ret = -ENOMEM;
goto out;
}
@@ -697,15 +719,13 @@ static ssize_t adb_read(struct file *file, char __user *buf,
int ret = 0;
struct adbdev_state *state = file->private_data;
struct adb_request *req;
- DECLARE_WAITQUEUE(wait,current);
+ DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
if (count < 2)
return -EINVAL;
if (count > sizeof(req->reply))
count = sizeof(req->reply);
- if (!access_ok(VERIFY_WRITE, buf, count))
- return -EFAULT;
req = NULL;
spin_lock_irqsave(&state->lock, flags);
@@ -762,8 +782,6 @@ static ssize_t adb_write(struct file *file, const char __user *buf,
return -EINVAL;
if (adb_controller == NULL)
return -ENXIO;
- if (!access_ok(VERIFY_READ, buf, count))
- return -EFAULT;
req = kmalloc(sizeof(struct adb_request),
GFP_KERNEL);
@@ -794,8 +812,8 @@ static ssize_t adb_write(struct file *file, const char __user *buf,
}
/* Special case for ADB_BUSRESET request, all others are sent to
the controller */
- else if ((req->data[0] == ADB_PACKET)&&(count > 1)
- &&(req->data[1] == ADB_BUSRESET)) {
+ else if ((req->data[0] == ADB_PACKET) && (count > 1)
+ && (req->data[1] == ADB_BUSRESET)) {
ret = do_adb_reset_bus();
up(&adb_probe_mutex);
atomic_dec(&state->n_pending);
@@ -824,21 +842,31 @@ out:
static const struct file_operations adb_fops = {
.owner = THIS_MODULE,
- .llseek = no_llseek,
.read = adb_read,
.write = adb_write,
.open = adb_open,
.release = adb_release,
};
+#ifdef CONFIG_PM
+static const struct dev_pm_ops adb_dev_pm_ops = {
+ .suspend = adb_suspend,
+ .resume = adb_resume,
+ /* Hibernate hooks */
+ .freeze = adb_freeze,
+ .thaw = adb_resume,
+ .poweroff = adb_poweroff,
+ .restore = adb_resume,
+};
+#endif
+
static struct platform_driver adb_pfdrv = {
.driver = {
.name = "adb",
- },
#ifdef CONFIG_PM
- .suspend = adb_suspend,
- .resume = adb_resume,
+ .pm = &adb_dev_pm_ops,
#endif
+ },
};
static struct platform_device adb_pfdev = {
@@ -857,14 +885,14 @@ static void __init
adbdev_init(void)
{
if (register_chrdev(ADB_MAJOR, "adb", &adb_fops)) {
- printk(KERN_ERR "adb: unable to get major %d\n", ADB_MAJOR);
+ pr_err("adb: unable to get major %d\n", ADB_MAJOR);
return;
}
- adb_dev_class = class_create(THIS_MODULE, "adb");
- if (IS_ERR(adb_dev_class))
+ if (class_register(&adb_dev_class))
return;
- device_create(adb_dev_class, NULL, MKDEV(ADB_MAJOR, 0), NULL, "adb");
+
+ device_create(&adb_dev_class, NULL, MKDEV(ADB_MAJOR, 0), NULL, "adb");
platform_device_register(&adb_pfdev);
platform_driver_probe(&adb_pfdrv, adb_dummy_probe);
generated by cgit (git 2.34.1) at 2025-12-25 03:35:47 +0000