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Subject[PATCH UPDATED] pcmcia: driver_socket as device_class interface
[depends on the pcmcia: bus_type pcmcia_bus_type, pcmcia-drivers patch
sent to you a few minutes ago.]

"Driver Servies" will probably become the "bus driver" for PCMCIA
(non-CardBus) cards. So register it as an interface to the device class
pcmcia_socket_class. Unfortunately, due to a driver model bug the
actual interface_add_data call is commented out. This only means that
unloading pcmcia sockets won't currently work, loading/enabling pcmcia
sockets should work fine (and does so here).

diff -ru linux-original/drivers/pcmcia/cs.c linux/drivers/pcmcia/cs.c
--- linux-original/drivers/pcmcia/cs.c 2003-02-27 18:55:16.000000000 +0100
+++ linux/drivers/pcmcia/cs.c 2003-02-27 19:45:23.000000000 +0100
@@ -345,6 +345,7 @@

s->ss_entry = cls_d->ops;
s->sock = i + cls_d->sock_offset;
+ s->s_dev = dev;

/* base address = 0, map = 0 */
s->cis_mem.flags = 0;
@@ -359,6 +360,7 @@
socket_table[j] = s;
if (j == sockets) sockets++;

+ s->socket_table_entry = j;
init_socket(s);
s->ss_entry->inquire_socket(s->sock, &s->cap);
#ifdef CONFIG_PROC_FS
diff -ru linux-original/drivers/pcmcia/cs_internal.h linux/drivers/pcmcia/cs_internal.h
--- linux-original/drivers/pcmcia/cs_internal.h 2003-02-27 18:55:16.000000000 +0100
+++ linux/drivers/pcmcia/cs_internal.h 2003-02-27 19:45:23.000000000 +0100
@@ -158,7 +158,11 @@
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc;
#endif
- int use_bus_pm;
+ int use_bus_pm;
+ struct device *s_dev;
+ /* TBD: integrate the following contents fully into this struct */
+ void *ds_info; /* ds_socket_info */
+ int socket_table_entry;
} socket_info_t;

/* Flags in config state */
diff -ru linux-original/drivers/pcmcia/ds.c linux/drivers/pcmcia/ds.c
--- linux-original/drivers/pcmcia/ds.c 2003-02-27 19:36:36.000000000 +0100
+++ linux/drivers/pcmcia/ds.c 2003-02-27 19:46:55.000000000 +0100
@@ -48,6 +48,7 @@
#include <linux/proc_fs.h>
#include <linux/poll.h>
#include <linux/pci.h>
+#include <linux/device.h>

#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
@@ -55,6 +56,11 @@
#include <pcmcia/bulkmem.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/bus_ops.h>
+#include <pcmcia/ss.h>
+
+#include "cs_internal.h"

/*====================================================================*/

@@ -68,11 +74,8 @@

#ifdef PCMCIA_DEBUG
INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
-#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static const char *version =
"ds.c 1.112 2001/10/13 00:08:28 (David Hinds)";
-#else
-#define DEBUG(n, args...)
#endif

/*====================================================================*/
@@ -97,7 +100,7 @@
} user_info_t;

/* Socket state information */
-typedef struct socket_info_t {
+struct ds_socket_info {
client_handle_t handle;
int state;
user_info_t *user;
@@ -105,9 +108,11 @@
wait_queue_head_t queue, request;
struct timer_list removal;
socket_bind_t *bind;
-} socket_info_t;
+};

-#define SOCKET_PRESENT 0x01
+#ifndef SOCKET_PRESENT
+#define SOCKET_PRESENT 0x08
+#endif
#define SOCKET_BUSY 0x02
#define SOCKET_REMOVAL_PENDING 0x10

@@ -116,8 +121,7 @@
/* Device driver ID passed to Card Services */
static dev_info_t dev_info = "Driver Services";

-static int sockets = 0, major_dev = -1;
-static socket_info_t *socket_table = NULL;
+static int major_dev = -1;

extern struct proc_dir_entry *proc_pccard;

@@ -159,15 +163,20 @@
void pcmcia_unregister_driver(struct pcmcia_driver *driver)
{
socket_bind_t *b;
+ struct ds_socket_info *ds;
int i;

if (driver->use_count > 0) {
/* Blank out any left-over device instances */
driver->attach = NULL; driver->detach = NULL;
- for (i = 0; i < sockets; i++)
- for (b = socket_table[i].bind; b; b = b->next)
+ for (i = 0; i < sockets; i++) {
+ if (!socket_table[i] || !socket_table[i]->ds_info)
+ continue;
+ ds = socket_table[i]->ds_info;
+ for (b = ds->bind; b; b = b->next)
if (b->driver == driver)
b->instance = NULL;
+ }
}

driver_unregister(&driver->drv);
@@ -228,7 +237,7 @@
user->event[user->event_head] = event;
}

-static void handle_event(socket_info_t *s, event_t event)
+static void handle_event(struct ds_socket_info *s, event_t event)
{
user_info_t *user;
for (user = s->user; user; user = user->next)
@@ -236,7 +245,7 @@
wake_up_interruptible(&s->queue);
}

-static int handle_request(socket_info_t *s, event_t event)
+static int handle_request(struct ds_socket_info *s, event_t event)
{
if (s->req_pending != 0)
return CS_IN_USE;
@@ -255,7 +264,9 @@

static void handle_removal(u_long sn)
{
- socket_info_t *s = &socket_table[sn];
+ struct ds_socket_info *s = socket_table[sn]->ds_info;
+ if (!s)
+ return;
handle_event(s, CS_EVENT_CARD_REMOVAL);
s->state &= ~SOCKET_REMOVAL_PENDING;
}
@@ -269,37 +280,39 @@
static int ds_event(event_t event, int priority,
event_callback_args_t *args)
{
- socket_info_t *s;
- int i;
+ socket_info_t *s;
+ struct ds_socket_info *ds;

- DEBUG(1, "ds: ds_event(0x%06x, %d, 0x%p)\n",
- event, priority, args->client_handle);
- s = args->client_data;
- i = s - socket_table;
+ DEBUG(1, "ds: ds_event(0x%06x, %d, 0x%p)\n",
+ event, priority, args->client_handle);
+ s = args->client_data;
+ if (!s || !s->ds_info)
+ return -EINVAL;
+ ds = s->ds_info;

- switch (event) {
+ switch (event) {

case CS_EVENT_CARD_REMOVAL:
- s->state &= ~SOCKET_PRESENT;
- if (!(s->state & SOCKET_REMOVAL_PENDING)) {
- s->state |= SOCKET_REMOVAL_PENDING;
- init_timer(&s->removal);
- s->removal.expires = jiffies + HZ/10;
- add_timer(&s->removal);
+ ds->state &= ~SOCKET_PRESENT;
+ if (!(ds->state & SOCKET_REMOVAL_PENDING)) {
+ ds->state |= SOCKET_REMOVAL_PENDING;
+ init_timer(&ds->removal);
+ ds->removal.expires = jiffies + HZ/10;
+ add_timer(&ds->removal);
}
break;

case CS_EVENT_CARD_INSERTION:
- s->state |= SOCKET_PRESENT;
- handle_event(s, event);
+ ds->state |= SOCKET_PRESENT;
+ handle_event(ds, event);
break;

case CS_EVENT_EJECTION_REQUEST:
- return handle_request(s, event);
+ return handle_request(ds, event);
break;

default:
- handle_event(s, event);
+ handle_event(ds, event);
break;
}

@@ -346,9 +359,12 @@
struct pcmcia_driver *driver;
socket_bind_t *b;
bind_req_t bind_req;
- socket_info_t *s = &socket_table[i];
+ struct ds_socket_info *s = socket_table[i]->ds_info;
int ret;

+ if (!s)
+ return -ENODEV;
+
DEBUG(2, "bind_request(%d, '%s')\n", i,
(char *)bind_info->dev_info);
driver = get_pcmcia_driver(&bind_info->dev_info);
@@ -412,10 +428,13 @@

static int get_device_info(int i, bind_info_t *bind_info, int first)
{
- socket_info_t *s = &socket_table[i];
+ struct ds_socket_info *s = socket_table[i]->ds_info;
socket_bind_t *b;
dev_node_t *node;

+ if (!s)
+ return -ENODEV;
+
#ifdef CONFIG_CARDBUS
/*
* Some unbelievably ugly code to associate the PCI cardbus
@@ -482,7 +501,7 @@

static int unbind_request(int i, bind_info_t *bind_info)
{
- socket_info_t *s = &socket_table[i];
+ struct ds_socket_info *s = socket_table[i]->ds_info;
socket_bind_t **b, *c;

DEBUG(2, "unbind_request(%d, '%s')\n", i,
@@ -516,13 +535,15 @@
static int ds_open(struct inode *inode, struct file *file)
{
socket_t i = minor(inode->i_rdev);
- socket_info_t *s;
+ struct ds_socket_info *s;
user_info_t *user;

DEBUG(0, "ds_open(socket %d)\n", i);
if ((i >= sockets) || (sockets == 0))
return -ENODEV;
- s = &socket_table[i];
+ s = socket_table[i]->ds_info;
+ if (!s)
+ return -ENODEV;
if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
if (s->state & SOCKET_BUSY)
return -EBUSY;
@@ -548,13 +569,15 @@
static int ds_release(struct inode *inode, struct file *file)
{
socket_t i = minor(inode->i_rdev);
- socket_info_t *s;
+ struct ds_socket_info *s;
user_info_t *user, **link;

DEBUG(0, "ds_release(socket %d)\n", i);
if ((i >= sockets) || (sockets == 0))
return 0;
- s = &socket_table[i];
+ s = socket_table[i]->ds_info;
+ if (!s)
+ return -ENODEV;
user = file->private_data;
if (CHECK_USER(user))
goto out;
@@ -580,7 +603,7 @@
size_t count, loff_t *ppos)
{
socket_t i = minor(file->f_dentry->d_inode->i_rdev);
- socket_info_t *s;
+ struct ds_socket_info *s;
user_info_t *user;

DEBUG(2, "ds_read(socket %d)\n", i);
@@ -589,7 +612,9 @@
return -ENODEV;
if (count < 4)
return -EINVAL;
- s = &socket_table[i];
+ s = socket_table[i]->ds_info;
+ if (!s)
+ return -ENODEV;
user = file->private_data;
if (CHECK_USER(user))
return -EIO;
@@ -609,7 +634,7 @@
size_t count, loff_t *ppos)
{
socket_t i = minor(file->f_dentry->d_inode->i_rdev);
- socket_info_t *s;
+ struct ds_socket_info *s;
user_info_t *user;

DEBUG(2, "ds_write(socket %d)\n", i);
@@ -620,7 +645,9 @@
return -EINVAL;
if ((file->f_flags & O_ACCMODE) == O_RDONLY)
return -EBADF;
- s = &socket_table[i];
+ s = socket_table[i]->ds_info;
+ if (!s)
+ return -ENODEV;
user = file->private_data;
if (CHECK_USER(user))
return -EIO;
@@ -642,14 +669,16 @@
static u_int ds_poll(struct file *file, poll_table *wait)
{
socket_t i = minor(file->f_dentry->d_inode->i_rdev);
- socket_info_t *s;
+ struct ds_socket_info *s;
user_info_t *user;

DEBUG(2, "ds_poll(socket %d)\n", i);

if ((i >= sockets) || (sockets == 0))
return POLLERR;
- s = &socket_table[i];
+ s = socket_table[i]->ds_info;
+ if (!s)
+ return -ENODEV;
user = file->private_data;
if (CHECK_USER(user))
return POLLERR;
@@ -665,7 +694,7 @@
u_int cmd, u_long arg)
{
socket_t i = minor(inode->i_rdev);
- socket_info_t *s;
+ struct ds_socket_info *s;
u_int size;
int ret, err;
ds_ioctl_arg_t buf;
@@ -674,7 +703,7 @@

if ((i >= sockets) || (sockets == 0))
return -ENODEV;
- s = &socket_table[i];
+ s = socket_table[i]->ds_info;

size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL;
@@ -835,6 +864,136 @@

/*====================================================================*/

+static int ds_pcmcia_socket_add(socket_info_t *socket)
+{
+ struct ds_socket_info *ds;
+ client_reg_t client_reg;
+ bind_req_t bind;
+ int ret;
+
+ ds = kmalloc(sizeof(struct ds_socket_info), GFP_KERNEL);
+ if (!ds)
+ return -ENOMEM;
+ memset(ds, 0, sizeof(struct ds_socket_info));
+
+ socket->ds_info = ds;
+
+ init_waitqueue_head(&ds->queue);
+ init_waitqueue_head(&ds->request);
+ init_timer(&ds->removal);
+ ds->removal.data = socket->socket_table_entry;
+ ds->removal.function = &handle_removal;
+
+ bind.Socket = socket->socket_table_entry;
+ bind.Function = BIND_FN_ALL;
+ client_reg.dev_info = bind.dev_info = &dev_info;
+
+ ret = pcmcia_bind_device(&bind);
+ if (ret != CS_SUCCESS) {
+ cs_error(NULL, BindDevice, ret);
+ return -EINVAL;
+ }
+
+ /* Set up hotline to Card Services */
+ client_reg.Attributes = INFO_MASTER_CLIENT;
+ client_reg.EventMask =
+ CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
+ CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
+ CS_EVENT_EJECTION_REQUEST | CS_EVENT_INSERTION_REQUEST |
+ CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
+ client_reg.event_handler = &ds_event;
+ client_reg.Version = 0x0210;
+
+ client_reg.event_callback_args.client_data = socket;
+ ret = pcmcia_register_client(&ds->handle,
+ &client_reg);
+ if (ret != CS_SUCCESS) {
+ cs_error(NULL, RegisterClient, ret);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ds_pcmcia_socket_remove(socket_info_t *socket)
+{
+ struct ds_socket_info *ds = socket->ds_info;
+ if (ds) {
+ pcmcia_deregister_client(ds->handle);
+ kfree(ds);
+ }
+ return 0;
+}
+
+static struct device_interface ds_interface;
+
+static int ds_pcmcia_s_dev_add(struct device *dev)
+{
+ struct pcmcia_socket_class_data *cls_d = dev->class_data;
+ socket_info_t *s;
+ unsigned int i;
+ unsigned int ret = 0;
+
+ if (!cls_d)
+ return -ENODEV;
+ s = (socket_info_t *) cls_d->s_info;
+ if (!s)
+ return -ENODEV;
+
+ for (i = 0; i < cls_d->nsock; i++) {
+ ds_pcmcia_socket_add(s);
+ s++;
+ }
+ cls_d->ds_intf.dev = dev;
+ cls_d->ds_intf.intf = &ds_interface;
+ strncpy(cls_d->ds_intf.kobj.name, ds_interface.name, KOBJ_NAME_LEN);
+ cls_d->ds_intf.kobj.parent = &(dev->kobj);
+ cls_d->ds_intf.kobj.kset = &(ds_interface.kset);
+
+ /* add interface */
+ /* currently commented out due to deadlock */
+ //ret = interface_add_data(&(cls_d->ds_intf));
+ if (ret) {
+ s = (socket_info_t *) cls_d->s_info;
+ for (i = 0; i < cls_d->nsock; i++) {
+ ds_pcmcia_socket_remove(s);
+ s++;
+ }
+ }
+
+ return ret;
+}
+
+static int ds_pcmcia_s_dev_remove(struct intf_data *intf)
+{
+ struct pcmcia_socket_class_data *cls_d = intf->dev->class_data;
+ socket_info_t *s;
+ unsigned int i;
+
+ if (!cls_d)
+ return -ENODEV;
+ s = (socket_info_t *) cls_d->s_info;
+ if (!s)
+ return -ENODEV;
+
+ for (i = 0; i < cls_d->nsock; i++) {
+ ds_pcmcia_socket_remove(s);
+ s++;
+ }
+
+ return 0;
+}
+
+
+static struct device_interface ds_interface = {
+ .name = "pcmcia-bus",
+ .devclass = &pcmcia_socket_class,
+ .add_device = &ds_pcmcia_s_dev_add,
+ .remove_device = &ds_pcmcia_s_dev_remove,
+ .kset = { .subsys = &pcmcia_socket_class.subsys, },
+ .devnum = 0,
+};
+
struct bus_type pcmcia_bus_type = {
.name = "pcmcia",
};
@@ -846,106 +1005,54 @@
return 0;
}

-int __init init_pcmcia_ds(void)
+static int __init init_pcmcia_ds(void)
{
- client_reg_t client_reg;
- servinfo_t serv;
- bind_req_t bind;
- socket_info_t *s;
- int i, ret;
+ servinfo_t serv;
+ int i;

- DEBUG(0, "%s\n", version);
-
- /*
- * Ugly. But we want to wait for the socket threads to have started up.
- * We really should let the drivers themselves drive some of this..
- */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/4);
+ DEBUG(0, "%s\n", version);

- pcmcia_get_card_services_info(&serv);
- if (serv.Revision != CS_RELEASE_CODE) {
- printk(KERN_NOTICE "ds: Card Services release does not match!\n");
- return -1;
- }
- if (serv.Count == 0) {
- printk(KERN_NOTICE "ds: no socket drivers loaded!\n");
- return -1;
- }
-
- sockets = serv.Count;
- socket_table = kmalloc(sockets*sizeof(socket_info_t), GFP_KERNEL);
- if (!socket_table) return -1;
- for (i = 0, s = socket_table; i < sockets; i++, s++) {
- s->state = 0;
- s->user = NULL;
- s->req_pending = 0;
- init_waitqueue_head(&s->queue);
- init_waitqueue_head(&s->request);
- s->handle = NULL;
- init_timer(&s->removal);
- s->removal.data = i;
- s->removal.function = &handle_removal;
- s->bind = NULL;
- }
-
- /* Set up hotline to Card Services */
- client_reg.dev_info = bind.dev_info = &dev_info;
- client_reg.Attributes = INFO_MASTER_CLIENT;
- client_reg.EventMask =
- CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
- CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
- CS_EVENT_EJECTION_REQUEST | CS_EVENT_INSERTION_REQUEST |
- CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
- client_reg.event_handler = &ds_event;
- client_reg.Version = 0x0210;
- for (i = 0; i < sockets; i++) {
- bind.Socket = i;
- bind.Function = BIND_FN_ALL;
- ret = pcmcia_bind_device(&bind);
- if (ret != CS_SUCCESS) {
- cs_error(NULL, BindDevice, ret);
- break;
- }
- client_reg.event_callback_args.client_data = &socket_table[i];
- ret = pcmcia_register_client(&socket_table[i].handle,
- &client_reg);
- if (ret != CS_SUCCESS) {
- cs_error(NULL, RegisterClient, ret);
- break;
+ /*
+ * Ugly. But we want to wait for the socket threads to have started up.
+ * We really should let the drivers themselves drive some of this..
+ */
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HZ/4);
+
+ pcmcia_get_card_services_info(&serv);
+ if (serv.Revision != CS_RELEASE_CODE) {
+ printk(KERN_NOTICE "ds: Card Services release does not match!\n");
+ return -1;
}
- }
-
- /* Set up character device for user mode clients */
- i = register_chrdev(0, "pcmcia", &ds_fops);
- if (i == -EBUSY)
- printk(KERN_NOTICE "unable to find a free device # for "
+
+ interface_register(&ds_interface);
+
+ /* Set up character device for user mode clients */
+ i = register_chrdev(0, "pcmcia", &ds_fops);
+ if (i == -EBUSY)
+ printk(KERN_NOTICE "unable to find a free device # for "
"Driver Services\n");
- else
- major_dev = i;
+ else
+ major_dev = i;

#ifdef CONFIG_PROC_FS
- if (proc_pccard)
- create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL);
- init_status = 0;
+ if (proc_pccard)
+ create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL);
+ init_status = 0;
#endif
- return 0;
+ return 0;
}

static void __exit exit_pcmcia_ds(void)
{
- int i;
#ifdef CONFIG_PROC_FS
- if (proc_pccard)
- remove_proc_entry("drivers", proc_pccard);
+ if (proc_pccard)
+ remove_proc_entry("drivers", proc_pccard);
#endif
- if (major_dev != -1)
- unregister_chrdev(major_dev, "pcmcia");
- for (i = 0; i < sockets; i++)
- pcmcia_deregister_client(socket_table[i].handle);
- sockets = 0;
- kfree(socket_table);
- bus_unregister(&pcmcia_bus_type);
+ if (major_dev != -1)
+ unregister_chrdev(major_dev, "pcmcia");
+ interface_unregister(&ds_interface);
+ bus_unregister(&pcmcia_bus_type);
}

#ifdef MODULE
@@ -972,6 +1079,7 @@
void (*detach)(dev_link_t *))
{
struct pcmcia_driver *driver;
+ struct ds_socket_info *ds;
socket_bind_t *b;
int i;

@@ -992,16 +1100,19 @@
return 0;

/* Instantiate any already-bound devices */
- for (i = 0; i < sockets; i++)
- for (b = socket_table[i].bind; b; b = b->next) {
- if (b->driver != driver)
+ for (i = 0; i < sockets; i++) {
+ if (!socket_table[i] || !socket_table[i]->ds_info)
+ continue;
+ ds = socket_table[i]->ds_info;
+ for (b = ds->bind; b; b = b->next) {
+ if (b->driver != driver)
continue;
b->instance = driver->attach();
if (b->instance == NULL)
printk(KERN_NOTICE "ds: unable to create instance "
"of '%s'!\n", driver->drv.name);
}
-
+ }
return 0;
} /* register_pccard_driver */
EXPORT_SYMBOL(register_pccard_driver);
diff -ru linux-original/include/pcmcia/ss.h linux/include/pcmcia/ss.h
--- linux-original/include/pcmcia/ss.h 2003-02-27 18:55:19.000000000 +0100
+++ linux/include/pcmcia/ss.h 2003-02-27 19:45:23.000000000 +0100
@@ -152,6 +152,7 @@
struct pccard_operations *ops; /* see above */
void *s_info; /* socket_info_t */
unsigned int use_bus_pm;
+ struct intf_data ds_intf; /* intf data for driver services */
};

extern struct device_class pcmcia_socket_class;
-
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