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path: root/drivers/sbus/char/uctrl.c
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Diffstat (limited to 'drivers/sbus/char/uctrl.c')
-rw-r--r--drivers/sbus/char/uctrl.c216
1 files changed, 120 insertions, 96 deletions
diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c
index 777637594ac..27993c37775 100644
--- a/drivers/sbus/char/uctrl.c
+++ b/drivers/sbus/char/uctrl.c
@@ -1,7 +1,7 @@
-/* $Id: uctrl.c,v 1.12 2001/10/08 22:19:51 davem Exp $
- * uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
+/* uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
*
* Copyright 1999 Derrick J Brashear (shadow@dementia.org)
+ * Copyright 2008 David S. Miller (davem@davemloft.net)
*/
#include <linux/module.h>
@@ -14,6 +14,8 @@
#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/mm.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
@@ -21,7 +23,6 @@
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/pgtable.h>
-#include <asm/sbus.h>
#define UCTRL_MINOR 174
@@ -33,26 +34,26 @@
#endif
struct uctrl_regs {
- volatile u32 uctrl_intr;
- volatile u32 uctrl_data;
- volatile u32 uctrl_stat;
- volatile u32 uctrl_xxx[5];
+ u32 uctrl_intr;
+ u32 uctrl_data;
+ u32 uctrl_stat;
+ u32 uctrl_xxx[5];
};
struct ts102_regs {
- volatile u32 card_a_intr;
- volatile u32 card_a_stat;
- volatile u32 card_a_ctrl;
- volatile u32 card_a_xxx;
- volatile u32 card_b_intr;
- volatile u32 card_b_stat;
- volatile u32 card_b_ctrl;
- volatile u32 card_b_xxx;
- volatile u32 uctrl_intr;
- volatile u32 uctrl_data;
- volatile u32 uctrl_stat;
- volatile u32 uctrl_xxx;
- volatile u32 ts102_xxx[4];
+ u32 card_a_intr;
+ u32 card_a_stat;
+ u32 card_a_ctrl;
+ u32 card_a_xxx;
+ u32 card_b_intr;
+ u32 card_b_stat;
+ u32 card_b_ctrl;
+ u32 card_b_xxx;
+ u32 uctrl_intr;
+ u32 uctrl_data;
+ u32 uctrl_stat;
+ u32 uctrl_xxx;
+ u32 ts102_xxx[4];
};
/* Bits for uctrl_intr register */
@@ -186,17 +187,15 @@ enum uctrl_opcode {
POWER_RESTART=0x83,
};
-struct uctrl_driver {
- struct uctrl_regs *regs;
+static struct uctrl_driver {
+ struct uctrl_regs __iomem *regs;
int irq;
int pending;
struct uctrl_status status;
-};
-
-static struct uctrl_driver drv;
+} *global_driver;
-static void uctrl_get_event_status(void);
-static void uctrl_get_external_status(void);
+static void uctrl_get_event_status(struct uctrl_driver *);
+static void uctrl_get_external_status(struct uctrl_driver *);
static int
uctrl_ioctl(struct inode *inode, struct file *file,
@@ -213,16 +212,14 @@ static int
uctrl_open(struct inode *inode, struct file *file)
{
lock_kernel();
- uctrl_get_event_status();
- uctrl_get_external_status();
+ uctrl_get_event_status(global_driver);
+ uctrl_get_external_status(global_driver);
unlock_kernel();
return 0;
}
static irqreturn_t uctrl_interrupt(int irq, void *dev_id)
{
- struct uctrl_driver *driver = (struct uctrl_driver *)dev_id;
- printk("in uctrl_interrupt\n");
return IRQ_HANDLED;
}
@@ -244,11 +241,11 @@ static struct miscdevice uctrl_dev = {
{ \
unsigned int i; \
for (i = 0; i < 10000; i++) { \
- if (UCTRL_STAT_TXNF_STA & driver->regs->uctrl_stat) \
+ if (UCTRL_STAT_TXNF_STA & sbus_readl(&driver->regs->uctrl_stat)) \
break; \
} \
dprintk(("write data 0x%02x\n", value)); \
- driver->regs->uctrl_data = value; \
+ sbus_writel(value, &driver->regs->uctrl_data); \
}
/* Wait for something to read, read it, then clear the bit */
@@ -257,24 +254,23 @@ static struct miscdevice uctrl_dev = {
unsigned int i; \
value = 0; \
for (i = 0; i < 10000; i++) { \
- if ((UCTRL_STAT_RXNE_STA & driver->regs->uctrl_stat) == 0) \
+ if ((UCTRL_STAT_RXNE_STA & sbus_readl(&driver->regs->uctrl_stat)) == 0) \
break; \
udelay(1); \
} \
- value = driver->regs->uctrl_data; \
+ value = sbus_readl(&driver->regs->uctrl_data); \
dprintk(("read data 0x%02x\n", value)); \
- driver->regs->uctrl_stat = UCTRL_STAT_RXNE_STA; \
+ sbus_writel(UCTRL_STAT_RXNE_STA, &driver->regs->uctrl_stat); \
}
-static void uctrl_do_txn(struct uctrl_txn *txn)
+static void uctrl_do_txn(struct uctrl_driver *driver, struct uctrl_txn *txn)
{
- struct uctrl_driver *driver = &drv;
int stat, incnt, outcnt, bytecnt, intr;
u32 byte;
- stat = driver->regs->uctrl_stat;
- intr = driver->regs->uctrl_intr;
- driver->regs->uctrl_stat = stat;
+ stat = sbus_readl(&driver->regs->uctrl_stat);
+ intr = sbus_readl(&driver->regs->uctrl_intr);
+ sbus_writel(stat, &driver->regs->uctrl_stat);
dprintk(("interrupt stat 0x%x int 0x%x\n", stat, intr));
@@ -305,9 +301,8 @@ static void uctrl_do_txn(struct uctrl_txn *txn)
}
}
-static void uctrl_get_event_status(void)
+static void uctrl_get_event_status(struct uctrl_driver *driver)
{
- struct uctrl_driver *driver = &drv;
struct uctrl_txn txn;
u8 outbits[2];
@@ -317,7 +312,7 @@ static void uctrl_get_event_status(void)
txn.inbuf = NULL;
txn.outbuf = outbits;
- uctrl_do_txn(&txn);
+ uctrl_do_txn(driver, &txn);
dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
driver->status.event_status =
@@ -325,9 +320,8 @@ static void uctrl_get_event_status(void)
dprintk(("ev is %x\n", driver->status.event_status));
}
-static void uctrl_get_external_status(void)
+static void uctrl_get_external_status(struct uctrl_driver *driver)
{
- struct uctrl_driver *driver = &drv;
struct uctrl_txn txn;
u8 outbits[2];
int i, v;
@@ -338,7 +332,7 @@ static void uctrl_get_external_status(void)
txn.inbuf = NULL;
txn.outbuf = outbits;
- uctrl_do_txn(&txn);
+ uctrl_do_txn(driver, &txn);
dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
driver->status.external_status =
@@ -354,71 +348,101 @@ static void uctrl_get_external_status(void)
}
-static int __init ts102_uctrl_init(void)
+static int __devinit uctrl_probe(struct of_device *op,
+ const struct of_device_id *match)
{
- struct uctrl_driver *driver = &drv;
- int len;
- struct linux_prom_irqs tmp_irq[2];
- unsigned int vaddr[2] = { 0, 0 };
- int tmpnode, uctrlnode = prom_getchild(prom_root_node);
- int err;
+ struct uctrl_driver *p;
+ int err = -ENOMEM;
- tmpnode = prom_searchsiblings(uctrlnode, "obio");
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p) {
+ printk(KERN_ERR "uctrl: Unable to allocate device struct.\n");
+ goto out;
+ }
- if (tmpnode)
- uctrlnode = prom_getchild(tmpnode);
+ p->regs = of_ioremap(&op->resource[0], 0,
+ resource_size(&op->resource[0]),
+ "uctrl");
+ if (!p->regs) {
+ printk(KERN_ERR "uctrl: Unable to map registers.\n");
+ goto out_free;
+ }
- uctrlnode = prom_searchsiblings(uctrlnode, "uctrl");
+ p->irq = op->irqs[0];
+ err = request_irq(p->irq, uctrl_interrupt, 0, "uctrl", p);
+ if (err) {
+ printk(KERN_ERR "uctrl: Unable to register irq.\n");
+ goto out_iounmap;
+ }
- if (!uctrlnode)
- return -ENODEV;
+ err = misc_register(&uctrl_dev);
+ if (err) {
+ printk(KERN_ERR "uctrl: Unable to register misc device.\n");
+ goto out_free_irq;
+ }
- /* the prom mapped it for us */
- len = prom_getproperty(uctrlnode, "address", (void *) vaddr,
- sizeof(vaddr));
- driver->regs = (struct uctrl_regs *)vaddr[0];
+ sbus_writel(UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK, &p->regs->uctrl_intr);
+ printk(KERN_INFO "%s: uctrl regs[0x%p] (irq %d)\n",
+ op->node->full_name, p->regs, p->irq);
+ uctrl_get_event_status(p);
+ uctrl_get_external_status(p);
- len = prom_getproperty(uctrlnode, "intr", (char *) tmp_irq,
- sizeof(tmp_irq));
+ dev_set_drvdata(&op->dev, p);
+ global_driver = p;
- /* Flush device */
- READUCTLDATA(len);
+out:
+ return err;
- if(!driver->irq)
- driver->irq = tmp_irq[0].pri;
+out_free_irq:
+ free_irq(p->irq, p);
- err = request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver);
- if (err) {
- printk("%s: unable to register irq %d\n",
- __func__, driver->irq);
- return err;
- }
+out_iounmap:
+ of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
- if (misc_register(&uctrl_dev)) {
- printk("%s: unable to get misc minor %d\n",
- __func__, uctrl_dev.minor);
- free_irq(driver->irq, driver);
- return -ENODEV;
- }
+out_free:
+ kfree(p);
+ goto out;
+}
- driver->regs->uctrl_intr = UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK;
- printk("uctrl: 0x%p (irq %d)\n", driver->regs, driver->irq);
- uctrl_get_event_status();
- uctrl_get_external_status();
- return 0;
+static int __devexit uctrl_remove(struct of_device *op)
+{
+ struct uctrl_driver *p = dev_get_drvdata(&op->dev);
+
+ if (p) {
+ misc_deregister(&uctrl_dev);
+ free_irq(p->irq, p);
+ of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
+ kfree(p);
+ }
+ return 0;
}
-static void __exit ts102_uctrl_cleanup(void)
+static const struct of_device_id uctrl_match[] = {
+ {
+ .name = "uctrl",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, uctrl_match);
+
+static struct of_platform_driver uctrl_driver = {
+ .name = "uctrl",
+ .match_table = uctrl_match,
+ .probe = uctrl_probe,
+ .remove = __devexit_p(uctrl_remove),
+};
+
+
+static int __init uctrl_init(void)
{
- struct uctrl_driver *driver = &drv;
+ return of_register_driver(&uctrl_driver, &of_bus_type);
+}
- misc_deregister(&uctrl_dev);
- if (driver->irq)
- free_irq(driver->irq, driver);
- if (driver->regs)
- driver->regs = NULL;
+static void __exit uctrl_exit(void)
+{
+ of_unregister_driver(&uctrl_driver);
}
-module_init(ts102_uctrl_init);
-module_exit(ts102_uctrl_cleanup);
+module_init(uctrl_init);
+module_exit(uctrl_exit);
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 12:17:47 +0000