[RFC PATCH 02/10] PCMCIA: soc_common: provide single socket add/remove functionality
Russell King - ARM Linux
linux at arm.linux.org.uk
Tue Oct 27 19:11:50 EDT 2009
Factor out the functionality for adding and removing a single
socket, thereby allowing SoCs to individually register each
socket. The advantage of this approach is that SoCs can then
extend soc_pcmcia_socket as they wish.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/pcmcia/soc_common.c | 230 +++++++++++++++++++++++--------------------
drivers/pcmcia/soc_common.h | 3 +-
2 files changed, 125 insertions(+), 108 deletions(-)
diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index 38c5484..8938608 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -573,7 +573,7 @@ void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt,
EXPORT_SYMBOL(soc_pcmcia_enable_irqs);
-LIST_HEAD(soc_pcmcia_sockets);
+static LIST_HEAD(soc_pcmcia_sockets);
static DEFINE_MUTEX(soc_pcmcia_sockets_lock);
#ifdef CONFIG_CPU_FREQ
@@ -618,158 +618,174 @@ module_exit(soc_pcmcia_cpufreq_unregister);
#endif
-int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
- struct skt_dev_info *sinfo)
+void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt)
{
- struct soc_pcmcia_socket *skt;
- int ret, i;
-
mutex_lock(&soc_pcmcia_sockets_lock);
+ del_timer_sync(&skt->poll_timer);
- /*
- * Initialise the per-socket structure.
- */
- for (i = 0; i < sinfo->nskt; i++) {
- skt = &sinfo->skt[i];
+ pcmcia_unregister_socket(&skt->socket);
- skt->socket.ops = &soc_common_pcmcia_operations;
- skt->socket.owner = ops->owner;
- skt->socket.dev.parent = dev;
+ flush_scheduled_work();
- init_timer(&skt->poll_timer);
- skt->poll_timer.function = soc_common_pcmcia_poll_event;
- skt->poll_timer.data = (unsigned long)skt;
- skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD;
+ skt->ops->hw_shutdown(skt);
- skt->dev = dev;
- skt->ops = ops;
+ soc_common_pcmcia_config_skt(skt, &dead_socket);
- ret = request_resource(&iomem_resource, &skt->res_skt);
- if (ret)
- goto out_err_1;
+ list_del(&skt->node);
+ mutex_unlock(&soc_pcmcia_sockets_lock);
- ret = request_resource(&skt->res_skt, &skt->res_io);
- if (ret)
- goto out_err_2;
+ iounmap(skt->virt_io);
+ skt->virt_io = NULL;
+ release_resource(&skt->res_attr);
+ release_resource(&skt->res_mem);
+ release_resource(&skt->res_io);
+ release_resource(&skt->res_skt);
+}
+EXPORT_SYMBOL(soc_pcmcia_remove_one);
- ret = request_resource(&skt->res_skt, &skt->res_mem);
- if (ret)
- goto out_err_3;
+int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt)
+{
+ int ret;
- ret = request_resource(&skt->res_skt, &skt->res_attr);
- if (ret)
- goto out_err_4;
+ init_timer(&skt->poll_timer);
+ skt->poll_timer.function = soc_common_pcmcia_poll_event;
+ skt->poll_timer.data = (unsigned long)skt;
+ skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD;
- skt->virt_io = ioremap(skt->res_io.start, 0x10000);
- if (skt->virt_io == NULL) {
- ret = -ENOMEM;
- goto out_err_5;
- }
+ ret = request_resource(&iomem_resource, &skt->res_skt);
+ if (ret)
+ goto out_err_1;
- list_add(&skt->node, &soc_pcmcia_sockets);
+ ret = request_resource(&skt->res_skt, &skt->res_io);
+ if (ret)
+ goto out_err_2;
- /*
- * We initialize default socket timing here, because
- * we are not guaranteed to see a SetIOMap operation at
- * runtime.
- */
- ops->set_timing(skt);
+ ret = request_resource(&skt->res_skt, &skt->res_mem);
+ if (ret)
+ goto out_err_3;
- ret = ops->hw_init(skt);
- if (ret)
- goto out_err_6;
+ ret = request_resource(&skt->res_skt, &skt->res_attr);
+ if (ret)
+ goto out_err_4;
- skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;
- skt->socket.resource_ops = &pccard_static_ops;
- skt->socket.irq_mask = 0;
- skt->socket.map_size = PAGE_SIZE;
- skt->socket.pci_irq = skt->irq;
- skt->socket.io_offset = (unsigned long)skt->virt_io;
+ skt->virt_io = ioremap(skt->res_io.start, 0x10000);
+ if (skt->virt_io == NULL) {
+ ret = -ENOMEM;
+ goto out_err_5;
+ }
- skt->status = soc_common_pcmcia_skt_state(skt);
+ mutex_lock(&soc_pcmcia_sockets_lock);
- ret = pcmcia_register_socket(&skt->socket);
- if (ret)
- goto out_err_7;
+ list_add(&skt->node, &soc_pcmcia_sockets);
- WARN_ON(skt->socket.sock != i);
+ /*
+ * We initialize default socket timing here, because
+ * we are not guaranteed to see a SetIOMap operation at
+ * runtime.
+ */
+ skt->ops->set_timing(skt);
- add_timer(&skt->poll_timer);
+ ret = skt->ops->hw_init(skt);
+ if (ret)
+ goto out_err_6;
- ret = device_create_file(&skt->socket.dev, &dev_attr_status);
- if (ret)
- goto out_err_8;
- }
+ skt->socket.ops = &soc_common_pcmcia_operations;
+ skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;
+ skt->socket.resource_ops = &pccard_static_ops;
+ skt->socket.irq_mask = 0;
+ skt->socket.map_size = PAGE_SIZE;
+ skt->socket.pci_irq = skt->irq;
+ skt->socket.io_offset = (unsigned long)skt->virt_io;
- dev_set_drvdata(dev, sinfo);
- ret = 0;
- goto out;
+ skt->status = soc_common_pcmcia_skt_state(skt);
- do {
- skt = &sinfo->skt[i];
+ ret = pcmcia_register_socket(&skt->socket);
+ if (ret)
+ goto out_err_7;
+
+ add_timer(&skt->poll_timer);
+
+ mutex_unlock(&soc_pcmcia_sockets_lock);
+
+ ret = device_create_file(&skt->socket.dev, &dev_attr_status);
+ if (ret)
+ goto out_err_8;
+
+ return ret;
- device_remove_file(&skt->socket.dev, &dev_attr_status);
out_err_8:
- del_timer_sync(&skt->poll_timer);
- pcmcia_unregister_socket(&skt->socket);
+ mutex_lock(&soc_pcmcia_sockets_lock);
+ del_timer_sync(&skt->poll_timer);
+ pcmcia_unregister_socket(&skt->socket);
out_err_7:
- flush_scheduled_work();
+ flush_scheduled_work();
- ops->hw_shutdown(skt);
+ skt->ops->hw_shutdown(skt);
out_err_6:
- list_del(&skt->node);
- iounmap(skt->virt_io);
+ list_del(&skt->node);
+ mutex_unlock(&soc_pcmcia_sockets_lock);
+ iounmap(skt->virt_io);
out_err_5:
- release_resource(&skt->res_attr);
+ release_resource(&skt->res_attr);
out_err_4:
- release_resource(&skt->res_mem);
+ release_resource(&skt->res_mem);
out_err_3:
- release_resource(&skt->res_io);
+ release_resource(&skt->res_io);
out_err_2:
- release_resource(&skt->res_skt);
+ release_resource(&skt->res_skt);
out_err_1:
- i--;
- } while (i > 0);
- kfree(sinfo);
-
- out:
- mutex_unlock(&soc_pcmcia_sockets_lock);
return ret;
}
-EXPORT_SYMBOL(soc_common_drv_pcmcia_probe);
+EXPORT_SYMBOL(soc_pcmcia_add_one);
-int soc_common_drv_pcmcia_remove(struct device *dev)
+int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
+ struct skt_dev_info *sinfo)
{
- struct skt_dev_info *sinfo = dev_get_drvdata(dev);
- int i;
+ struct soc_pcmcia_socket *skt;
+ int ret, i;
- dev_set_drvdata(dev, NULL);
+ /*
+ * Initialise the per-socket structure.
+ */
+ for (i = ret = 0; i < sinfo->nskt; i++) {
+ skt = &sinfo->skt[i];
- mutex_lock(&soc_pcmcia_sockets_lock);
- for (i = 0; i < sinfo->nskt; i++) {
- struct soc_pcmcia_socket *skt = &sinfo->skt[i];
+ skt->socket.owner = ops->owner;
+ skt->socket.dev.parent = dev;
- del_timer_sync(&skt->poll_timer);
+ skt->dev = dev;
+ skt->ops = ops;
- pcmcia_unregister_socket(&skt->socket);
+ ret = soc_pcmcia_add_one(skt);
+ if (ret)
+ break;
- flush_scheduled_work();
+ WARN_ON(skt->socket.sock != i);
+ }
- skt->ops->hw_shutdown(skt);
+ if (ret) {
+ while (--i >= 0)
+ soc_pcmcia_remove_one(&sinfo->skt[i]);
+ kfree(sinfo);
+ } else {
+ dev_set_drvdata(dev, sinfo);
+ }
- soc_common_pcmcia_config_skt(skt, &dead_socket);
+ return ret;
+}
+EXPORT_SYMBOL(soc_common_drv_pcmcia_probe);
- list_del(&skt->node);
- iounmap(skt->virt_io);
- skt->virt_io = NULL;
- release_resource(&skt->res_attr);
- release_resource(&skt->res_mem);
- release_resource(&skt->res_io);
- release_resource(&skt->res_skt);
- }
- mutex_unlock(&soc_pcmcia_sockets_lock);
+int soc_common_drv_pcmcia_remove(struct device *dev)
+{
+ struct skt_dev_info *sinfo = dev_get_drvdata(dev);
+ int i;
+
+ dev_set_drvdata(dev, NULL);
+
+ for (i = 0; i < sinfo->nskt; i++)
+ soc_pcmcia_remove_one(&sinfo->skt[i]);
kfree(sinfo);
diff --git a/drivers/pcmcia/soc_common.h b/drivers/pcmcia/soc_common.h
index 290e143..51c72ba 100644
--- a/drivers/pcmcia/soc_common.h
+++ b/drivers/pcmcia/soc_common.h
@@ -135,7 +135,8 @@ extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_
extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
-extern struct list_head soc_pcmcia_sockets;
+void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
+int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, struct skt_dev_info *sinfo);
extern int soc_common_drv_pcmcia_remove(struct device *dev);
--
1.6.2.5
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