[PATCH] I2C-MPC: Convert to platform_device driver
Kumar Gala
galak at somerset.sps.mot.com
Fri Jan 14 14:35:32 EST 2005
Converted the driver to work as either a OCP or platform_device driver.
The intent in the future (once we convert all PPC sub-archs from OCP to
platform_device) is to remove the OCP code.
Signed-off-by: Kumar Gala <kumar.gala at freescale.com>
--
diff -Nru a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
--- a/drivers/i2c/busses/Kconfig 2005-01-13 21:27:38 -06:00
+++ b/drivers/i2c/busses/Kconfig 2005-01-13 21:27:38 -06:00
@@ -208,7 +208,7 @@
config I2C_MPC
tristate "MPC107/824x/85xx/52xx"
- depends on I2C && FSL_OCP
+ depends on I2C && PPC
help
If you say yes to this option, support will be included for the
built-in I2C interface on the MPC107/Tsi107/MPC8240/MPC8245 and
diff -Nru a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
--- a/drivers/i2c/busses/i2c-mpc.c 2005-01-13 21:27:38 -06:00
+++ b/drivers/i2c/busses/i2c-mpc.c 2005-01-13 21:27:38 -06:00
@@ -1,12 +1,12 @@
/*
* (C) Copyright 2003-2004
* Humboldt Solutions Ltd, adrian at humboldt.co.uk.
-
+
* This is a combined i2c adapter and algorithm driver for the
* MPC107/Tsi107 PowerPC northbridge and processors that include
- * the same I2C unit (8240, 8245, 85xx).
+ * the same I2C unit (8240, 8245, 85xx).
*
- * Release 0.7
+ * Release 0.8
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
@@ -20,7 +20,13 @@
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/io.h>
+#ifdef CONFIG_FSL_OCP
#include <asm/ocp.h>
+#define FSL_I2C_DEV_SEPARATE_DFSRR FS_I2C_SEPARATE_DFSRR
+#define FSL_I2C_DEV_CLOCK_5200 FS_I2C_CLOCK_5200
+#else
+#include <linux/fsl_devices.h>
+#endif
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
@@ -50,10 +56,11 @@
struct mpc_i2c {
char *base;
- struct ocp_def *ocpdef;
u32 interrupt;
wait_queue_head_t queue;
struct i2c_adapter adap;
+ int irq;
+ u32 flags;
};
static __inline__ void writeccr(struct mpc_i2c *i2c, u32 x)
@@ -79,7 +86,8 @@
u32 x;
int result = 0;
- if (i2c->ocpdef->irq == OCP_IRQ_NA) {
+ if (i2c->irq == 0)
+ {
while (!(readb(i2c->base + MPC_I2C_SR) & CSR_MIF)) {
schedule();
if (time_after(jiffies, orig_jiffies + timeout)) {
@@ -92,7 +100,7 @@
writeb(0, i2c->base + MPC_I2C_SR);
} else {
/* Interrupt mode */
- result = wait_event_interruptible_timeout(i2c->queue,
+ result = wait_event_interruptible_timeout(i2c->queue,
(i2c->interrupt & CSR_MIF), timeout * HZ);
if (unlikely(result < 0))
@@ -130,12 +138,11 @@
static void mpc_i2c_setclock(struct mpc_i2c *i2c)
{
- struct ocp_fs_i2c_data *i2c_data = i2c->ocpdef->additions;
/* Set clock and filters */
- if (i2c_data && (i2c_data->flags & FS_I2C_SEPARATE_DFSRR)) {
+ if (i2c->flags & FSL_I2C_DEV_SEPARATE_DFSRR) {
writeb(0x31, i2c->base + MPC_I2C_FDR);
writeb(0x10, i2c->base + MPC_I2C_DFSRR);
- } else if (i2c_data && (i2c_data->flags & FS_I2C_CLOCK_5200))
+ } else if (i2c->flags & FSL_I2C_DEV_CLOCK_5200)
writeb(0x3f, i2c->base + MPC_I2C_FDR);
else
writel(0x1031, i2c->base + MPC_I2C_FDR);
@@ -287,6 +294,7 @@
.retries = 1
};
+#ifdef CONFIG_FSL_OCP
static int __devinit mpc_i2c_probe(struct ocp_device *ocp)
{
int result = 0;
@@ -296,7 +304,9 @@
return -ENOMEM;
}
memset(i2c, 0, sizeof(*i2c));
- i2c->ocpdef = ocp->def;
+
+ i2c->irq = ocp->def->irq;
+ i2c->flags = ((struct ocp_fs_i2c_data *)ocp->def->additions)->flags;
init_waitqueue_head(&i2c->queue);
if (!request_mem_region(ocp->def->paddr, MPC_I2C_REGION, "i2c-mpc")) {
@@ -312,16 +322,20 @@
goto fail_map;
}
- if (ocp->def->irq != OCP_IRQ_NA)
+ if (i2c->irq != OCP_IRQ_NA)
+ {
if ((result = request_irq(ocp->def->irq, mpc_i2c_isr,
0, "i2c-mpc", i2c)) < 0) {
printk(KERN_ERR
"i2c-mpc - failed to attach interrupt\n");
goto fail_irq;
}
+ } else
+ i2c->irq = 0;
i2c->adap = mpc_ops;
i2c_set_adapdata(&i2c->adap, i2c);
+
if ((result = i2c_add_adapter(&i2c->adap)) < 0) {
printk(KERN_ERR "i2c-mpc - failed to add adapter\n");
goto fail_add;
@@ -348,9 +362,9 @@
i2c_del_adapter(&i2c->adap);
if (ocp->def->irq != OCP_IRQ_NA)
- free_irq(i2c->ocpdef->irq, i2c);
+ free_irq(i2c->irq, i2c);
iounmap(i2c->base);
- release_mem_region(i2c->ocpdef->paddr, MPC_I2C_REGION);
+ release_mem_region(ocp->def->paddr, MPC_I2C_REGION);
kfree(i2c);
}
@@ -380,6 +394,101 @@
module_init(iic_init);
module_exit(iic_exit);
+#else
+static int fsl_i2c_probe(struct device *device)
+{
+ int result = 0;
+ struct mpc_i2c *i2c;
+ struct platform_device *pdev = to_platform_device(device);
+ struct fsl_i2c_platform_data *pdata;
+ struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ pdata = (struct fsl_i2c_platform_data *) pdev->dev.platform_data;
+
+ if (!(i2c = kmalloc(sizeof(*i2c), GFP_KERNEL))) {
+ return -ENOMEM;
+ }
+ memset(i2c, 0, sizeof(*i2c));
+
+ i2c->irq = platform_get_irq(pdev, 0);
+ i2c->flags = pdata->device_flags;
+ init_waitqueue_head(&i2c->queue);
+
+ i2c->base = ioremap((phys_addr_t)r->start, MPC_I2C_REGION);
+
+ if (!i2c->base) {
+ printk(KERN_ERR "i2c-mpc - failed to map controller\n");
+ result = -ENOMEM;
+ goto fail_map;
+ }
+
+ if (i2c->irq != 0)
+ if ((result = request_irq(i2c->irq, mpc_i2c_isr,
+ 0, "fsl-i2c", i2c)) < 0) {
+ printk(KERN_ERR
+ "i2c-mpc - failed to attach interrupt\n");
+ goto fail_irq;
+ }
+
+ i2c->adap = mpc_ops;
+ i2c_set_adapdata(&i2c->adap, i2c);
+ i2c->adap.dev.parent = &pdev->dev;
+ if ((result = i2c_add_adapter(&i2c->adap)) < 0) {
+ printk(KERN_ERR "i2c-mpc - failed to add adapter\n");
+ goto fail_add;
+ }
+
+ mpc_i2c_setclock(i2c);
+ dev_set_drvdata(device, i2c);
+ return result;
+
+ fail_add:
+ if (i2c->irq != 0)
+ free_irq(i2c->irq, 0);
+ fail_irq:
+ iounmap(i2c->base);
+ fail_map:
+ kfree(i2c);
+ return result;
+};
+
+static int fsl_i2c_remove(struct device *device)
+{
+ struct mpc_i2c *i2c = dev_get_drvdata(device);
+
+ dev_set_drvdata(device, NULL);
+ i2c_del_adapter(&i2c->adap);
+
+ if (i2c->irq != 0)
+ free_irq(i2c->irq, i2c);
+
+ iounmap(i2c->base);
+ kfree(i2c);
+ return 0;
+};
+
+/* Structure for a device driver */
+static struct device_driver fsl_i2c_driver = {
+ .name = "fsl-i2c",
+ .bus = &platform_bus_type,
+ .probe = fsl_i2c_probe,
+ .remove = fsl_i2c_remove,
+};
+
+static int __init fsl_i2c_init(void)
+{
+ return driver_register(&fsl_i2c_driver);
+}
+
+static void __exit fsl_i2c_exit(void)
+{
+ driver_unregister(&fsl_i2c_driver);
+}
+
+module_init(fsl_i2c_init);
+module_exit(fsl_i2c_exit);
+
+#endif /* CONFIG_FSL_OCP */
MODULE_AUTHOR("Adrian Cox <adrian at humboldt.co.uk>");
MODULE_DESCRIPTION
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