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openwrt/target/linux/ar7/patches-2.6.30/131-vlynq_fixes.patch

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--- a/drivers/vlynq/vlynq.c
+++ b/drivers/vlynq/vlynq.c
@@ -14,6 +14,9 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Parts of the VLYNQ specification can be found here:
+ * http://www.ti.com/litv/pdf/sprue36a
*/
#include <linux/init.h>
@@ -25,7 +28,6 @@
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
-#include <linux/device.h>
#include <linux/delay.h>
#include <linux/io.h>
@@ -73,15 +75,11 @@ struct vlynq_regs {
u32 int_device[8];
};
-#define vlynq_reg_read(reg) readl(&(reg))
-#define vlynq_reg_write(reg, val) writel(val, &(reg))
-
-static int __vlynq_enable_device(struct vlynq_device *dev);
-
-#ifdef VLYNQ_DEBUG
+#ifdef CONFIG_VLYNQ_DEBUG
static void vlynq_dump_regs(struct vlynq_device *dev)
{
int i;
+
printk(KERN_DEBUG "VLYNQ local=%p remote=%p\n",
dev->local, dev->remote);
for (i = 0; i < 32; i++) {
@@ -95,20 +93,23 @@ static void vlynq_dump_regs(struct vlynq
static void vlynq_dump_mem(u32 *base, int count)
{
int i;
+
for (i = 0; i < (count + 3) / 4; i++) {
- if (i % 4 == 0) printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
+ if (i % 4 == 0)
+ printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
printk(KERN_DEBUG " 0x%08x", *(base + i));
}
printk(KERN_DEBUG "\n");
}
#endif
-int vlynq_linked(struct vlynq_device *dev)
+/* Check the VLYNQ link status with a given device */
+static int vlynq_linked(struct vlynq_device *dev)
{
int i;
for (i = 0; i < 100; i++)
- if (vlynq_reg_read(dev->local->status) & VLYNQ_STATUS_LINK)
+ if (readl(&dev->local->status) & VLYNQ_STATUS_LINK)
return 1;
else
cpu_relax();
@@ -118,17 +119,15 @@ int vlynq_linked(struct vlynq_device *de
static void vlynq_reset(struct vlynq_device *dev)
{
- vlynq_reg_write(dev->local->control,
- vlynq_reg_read(dev->local->control) |
- VLYNQ_CTRL_RESET);
+ writel(readl(&dev->local->control) | VLYNQ_CTRL_RESET,
+ &dev->local->control);
/* Wait for the devices to finish resetting */
msleep(5);
/* Remove reset bit */
- vlynq_reg_write(dev->local->control,
- vlynq_reg_read(dev->local->control) &
- ~VLYNQ_CTRL_RESET);
+ writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET,
+ &dev->local->control);
/* Give some time for the devices to settle */
msleep(5);
@@ -142,9 +141,9 @@ static void vlynq_irq_unmask(unsigned in
BUG_ON(!dev);
virq = irq - dev->irq_start;
- val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
+ val = readl(&dev->remote->int_device[virq >> 2]);
val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
- vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
+ writel(val, &dev->remote->int_device[virq >> 2]);
}
static void vlynq_irq_mask(unsigned int irq)
@@ -155,9 +154,9 @@ static void vlynq_irq_mask(unsigned int
BUG_ON(!dev);
virq = irq - dev->irq_start;
- val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
+ val = readl(&dev->remote->int_device[virq >> 2]);
val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
- vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
+ writel(val, &dev->remote->int_device[virq >> 2]);
}
static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
@@ -168,7 +167,7 @@ static int vlynq_irq_type(unsigned int i
BUG_ON(!dev);
virq = irq - dev->irq_start;
- val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
+ val = readl(&dev->remote->int_device[virq >> 2]);
switch (flow_type & IRQ_TYPE_SENSE_MASK) {
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_EDGE_FALLING:
@@ -187,28 +186,30 @@ static int vlynq_irq_type(unsigned int i
default:
return -EINVAL;
}
- vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
+ writel(val, &dev->remote->int_device[virq >> 2]);
return 0;
}
static void vlynq_local_ack(unsigned int irq)
{
struct vlynq_device *dev = get_irq_chip_data(irq);
- u32 status = vlynq_reg_read(dev->local->status);
- if (printk_ratelimit())
- printk(KERN_DEBUG "%s: local status: 0x%08x\n",
- dev->dev.bus_id, status);
- vlynq_reg_write(dev->local->status, status);
+
+ u32 status = readl(&dev->local->status);
+
+ pr_debug("%s: local status: 0x%08x\n",
+ dev_name(&dev->dev), status);
+ writel(status, &dev->local->status);
}
static void vlynq_remote_ack(unsigned int irq)
{
struct vlynq_device *dev = get_irq_chip_data(irq);
- u32 status = vlynq_reg_read(dev->remote->status);
- if (printk_ratelimit())
- printk(KERN_DEBUG "%s: remote status: 0x%08x\n",
- dev->dev.bus_id, status);
- vlynq_reg_write(dev->remote->status, status);
+
+ u32 status = readl(&dev->remote->status);
+
+ pr_debug("%s: remote status: 0x%08x\n",
+ dev_name(&dev->dev), status);
+ writel(status, &dev->remote->status);
}
static irqreturn_t vlynq_irq(int irq, void *dev_id)
@@ -217,8 +218,8 @@ static irqreturn_t vlynq_irq(int irq, vo
u32 status;
int virq = 0;
- status = vlynq_reg_read(dev->local->int_status);
- vlynq_reg_write(dev->local->int_status, status);
+ status = readl(&dev->local->int_status);
+ writel(status, &dev->local->int_status);
if (unlikely(!status))
spurious_interrupt();
@@ -262,28 +263,28 @@ static int vlynq_setup_irq(struct vlynq_
if (dev->local_irq == dev->remote_irq) {
printk(KERN_ERR
"%s: local vlynq irq should be different from remote\n",
- dev->dev.bus_id);
+ dev_name(&dev->dev));
return -EINVAL;
}
/* Clear local and remote error bits */
- vlynq_reg_write(dev->local->status, vlynq_reg_read(dev->local->status));
- vlynq_reg_write(dev->remote->status,
- vlynq_reg_read(dev->remote->status));
+ writel(readl(&dev->local->status), &dev->local->status);
+ writel(readl(&dev->remote->status), &dev->remote->status);
/* Now setup interrupts */
val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
VLYNQ_CTRL_INT2CFG;
- val |= vlynq_reg_read(dev->local->control);
- vlynq_reg_write(dev->local->int_ptr, VLYNQ_INT_OFFSET);
- vlynq_reg_write(dev->local->control, val);
+ val |= readl(&dev->local->control);
+ writel(VLYNQ_INT_OFFSET, &dev->local->int_ptr);
+ writel(val, &dev->local->control);
val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
val |= VLYNQ_CTRL_INT_ENABLE;
- val |= vlynq_reg_read(dev->remote->control);
- vlynq_reg_write(dev->remote->int_ptr, VLYNQ_INT_OFFSET);
- vlynq_reg_write(dev->remote->control, val);
+ val |= readl(&dev->remote->control);
+ writel(VLYNQ_INT_OFFSET, &dev->remote->int_ptr);
+ writel(val, &dev->remote->int_ptr);
+ writel(val, &dev->remote->control);
for (i = dev->irq_start; i <= dev->irq_end; i++) {
virq = i - dev->irq_start;
@@ -299,12 +300,13 @@ static int vlynq_setup_irq(struct vlynq_
set_irq_chip_and_handler(i, &vlynq_irq_chip,
handle_simple_irq);
set_irq_chip_data(i, dev);
- vlynq_reg_write(dev->remote->int_device[virq >> 2], 0);
+ writel(0, &dev->remote->int_device[virq >> 2]);
}
}
if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) {
- printk(KERN_ERR "%s: request_irq failed\n", dev->dev.bus_id);
+ printk(KERN_ERR "%s: request_irq failed\n",
+ dev_name(&dev->dev));
return -EAGAIN;
}
@@ -328,11 +330,11 @@ static int vlynq_device_match(struct dev
if (ids->id == vdev->dev_id) {
vdev->divisor = ids->divisor;
vlynq_set_drvdata(vdev, ids);
- printk(KERN_INFO "Driver found for VLYNQ " \
+ printk(KERN_INFO "Driver found for VLYNQ "
"device: %08x\n", vdev->dev_id);
return 1;
}
- printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver" \
+ printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver"
" for VLYNQ device: %08x\n", ids->id, vdev->dev_id);
ids++;
}
@@ -346,8 +348,7 @@ static int vlynq_device_probe(struct dev
struct vlynq_device_id *id = vlynq_get_drvdata(vdev);
int result = -ENODEV;
- get_device(dev);
- if (drv && drv->probe)
+ if (drv->probe)
result = drv->probe(vdev, id);
if (result)
put_device(dev);
@@ -357,9 +358,10 @@ static int vlynq_device_probe(struct dev
static int vlynq_device_remove(struct device *dev)
{
struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
- if (drv && drv->remove)
+
+ if (drv->remove)
drv->remove(to_vlynq_device(dev));
- put_device(dev);
+
return 0;
}
@@ -377,6 +379,14 @@ void vlynq_unregister_driver(struct vlyn
}
EXPORT_SYMBOL(vlynq_unregister_driver);
+/*
+ * A VLYNQ remote device can clock the VLYNQ bus master
+ * using a dedicated clock line. In that case, both the
+ * remove device and the bus master should have the same
+ * serial clock dividers configured. Iterate through the
+ * 8 possible dividers until we actually link with the
+ * device.
+ */
static int __vlynq_try_remote(struct vlynq_device *dev)
{
int i;
@@ -389,21 +399,21 @@ static int __vlynq_try_remote(struct vly
if (!vlynq_linked(dev))
break;
- vlynq_reg_write(dev->remote->control,
- (vlynq_reg_read(dev->remote->control) &
+ writel((readl(&dev->remote->control) &
~VLYNQ_CTRL_CLOCK_MASK) |
VLYNQ_CTRL_CLOCK_INT |
- VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1));
- vlynq_reg_write(dev->local->control,
- ((vlynq_reg_read(dev->local->control)
+ VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
+ &dev->remote->control);
+ writel((readl(&dev->local->control)
& ~(VLYNQ_CTRL_CLOCK_INT |
VLYNQ_CTRL_CLOCK_MASK)) |
- VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1)));
+ VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
+ &dev->local->control);
if (vlynq_linked(dev)) {
printk(KERN_DEBUG
"%s: using remote clock divisor %d\n",
- dev->dev.bus_id, i - vlynq_rdiv1 + 1);
+ dev_name(&dev->dev), i - vlynq_rdiv1 + 1);
dev->divisor = i;
return 0;
} else {
@@ -414,26 +424,33 @@ static int __vlynq_try_remote(struct vly
return -ENODEV;
}
+/*
+ * A VLYNQ remote device can be clocked by the VLYNQ bus
+ * master using a dedicated clock line. In that case, only
+ * the bus master configures the serial clock divider.
+ * Iterate through the 8 possible dividers until we
+ * actually get a link with the device.
+ */
static int __vlynq_try_local(struct vlynq_device *dev)
{
int i;
-
+
vlynq_reset(dev);
for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ?
i <= vlynq_ldiv8 : i >= vlynq_ldiv2;
dev->dev_id ? i++ : i--) {
- vlynq_reg_write(dev->local->control,
- (vlynq_reg_read(dev->local->control) &
+ writel((readl(&dev->local->control) &
~VLYNQ_CTRL_CLOCK_MASK) |
VLYNQ_CTRL_CLOCK_INT |
- VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1));
+ VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1),
+ &dev->local->control);
if (vlynq_linked(dev)) {
printk(KERN_DEBUG
"%s: using local clock divisor %d\n",
- dev->dev.bus_id, i - vlynq_ldiv1 + 1);
+ dev_name(&dev->dev), i - vlynq_ldiv1 + 1);
dev->divisor = i;
return 0;
} else {
@@ -444,27 +461,33 @@ static int __vlynq_try_local(struct vlyn
return -ENODEV;
}
+/*
+ * When using external clocking method, serial clock
+ * is supplied by an external oscillator, therefore we
+ * should mask the local clock bit in the clock control
+ * register for both the bus master and the remote device.
+ */
static int __vlynq_try_external(struct vlynq_device *dev)
{
vlynq_reset(dev);
if (!vlynq_linked(dev))
return -ENODEV;
- vlynq_reg_write(dev->remote->control,
- (vlynq_reg_read(dev->remote->control) &
- ~VLYNQ_CTRL_CLOCK_INT));
-
- vlynq_reg_write(dev->local->control,
- (vlynq_reg_read(dev->local->control) &
- ~VLYNQ_CTRL_CLOCK_INT));
+ writel((readl(&dev->remote->control) &
+ ~VLYNQ_CTRL_CLOCK_INT),
+ &dev->remote->control);
+
+ writel((readl(&dev->local->control) &
+ ~VLYNQ_CTRL_CLOCK_INT),
+ &dev->local->control);
if (vlynq_linked(dev)) {
printk(KERN_DEBUG "%s: using external clock\n",
- dev->dev.bus_id);
+ dev_name(&dev->dev));
dev->divisor = vlynq_div_external;
return 0;
}
-
+
return -ENODEV;
}
@@ -481,10 +504,10 @@ static int __vlynq_enable_device(struct
case vlynq_div_external:
case vlynq_div_auto:
/* When the device is brought from reset it should have clock
- generation negotiated by hardware.
- Check which device is generating clocks and perform setup
- accordingly */
- if (vlynq_linked(dev) && vlynq_reg_read(dev->remote->control) &
+ * generation negotiated by hardware.
+ * Check which device is generating clocks and perform setup
+ * accordingly */
+ if (vlynq_linked(dev) && readl(&dev->remote->control) &
VLYNQ_CTRL_CLOCK_INT) {
if (!__vlynq_try_remote(dev) ||
!__vlynq_try_local(dev) ||
@@ -497,31 +520,43 @@ static int __vlynq_enable_device(struct
return 0;
}
break;
- case vlynq_ldiv1: case vlynq_ldiv2: case vlynq_ldiv3: case vlynq_ldiv4:
- case vlynq_ldiv5: case vlynq_ldiv6: case vlynq_ldiv7: case vlynq_ldiv8:
- vlynq_reg_write(dev->local->control,
- VLYNQ_CTRL_CLOCK_INT |
- VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
- vlynq_ldiv1));
- vlynq_reg_write(dev->remote->control, 0);
+ case vlynq_ldiv1:
+ case vlynq_ldiv2:
+ case vlynq_ldiv3:
+ case vlynq_ldiv4:
+ case vlynq_ldiv5:
+ case vlynq_ldiv6:
+ case vlynq_ldiv7:
+ case vlynq_ldiv8:
+ writel(VLYNQ_CTRL_CLOCK_INT |
+ VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
+ vlynq_ldiv1), &dev->local->control);
+ writel(0, &dev->remote->control);
if (vlynq_linked(dev)) {
printk(KERN_DEBUG
- "%s: using local clock divisor %d\n",
- dev->dev.bus_id, dev->divisor - vlynq_ldiv1 + 1);
+ "%s: using local clock divisor %d\n",
+ dev_name(&dev->dev),
+ dev->divisor - vlynq_ldiv1 + 1);
return 0;
}
break;
- case vlynq_rdiv1: case vlynq_rdiv2: case vlynq_rdiv3: case vlynq_rdiv4:
- case vlynq_rdiv5: case vlynq_rdiv6: case vlynq_rdiv7: case vlynq_rdiv8:
- vlynq_reg_write(dev->local->control, 0);
- vlynq_reg_write(dev->remote->control,
- VLYNQ_CTRL_CLOCK_INT |
- VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
- vlynq_rdiv1));
+ case vlynq_rdiv1:
+ case vlynq_rdiv2:
+ case vlynq_rdiv3:
+ case vlynq_rdiv4:
+ case vlynq_rdiv5:
+ case vlynq_rdiv6:
+ case vlynq_rdiv7:
+ case vlynq_rdiv8:
+ writel(0, &dev->local->control);
+ writel(VLYNQ_CTRL_CLOCK_INT |
+ VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
+ vlynq_rdiv1), &dev->remote->control);
if (vlynq_linked(dev)) {
printk(KERN_DEBUG
- "%s: using remote clock divisor %d\n",
- dev->dev.bus_id, dev->divisor - vlynq_rdiv1 + 1);
+ "%s: using remote clock divisor %d\n",
+ dev_name(&dev->dev),
+ dev->divisor - vlynq_rdiv1 + 1);
return 0;
}
break;
@@ -568,12 +603,10 @@ int vlynq_set_local_mapping(struct vlynq
if (!dev->enabled)
return -ENXIO;
- vlynq_reg_write(dev->local->tx_offset, tx_offset);
+ writel(tx_offset, &dev->local->tx_offset);
for (i = 0; i < 4; i++) {
- vlynq_reg_write(dev->local->rx_mapping[i].offset,
- mapping[i].offset);
- vlynq_reg_write(dev->local->rx_mapping[i].size,
- mapping[i].size);
+ writel(mapping[i].offset, &dev->local->rx_mapping[i].offset);
+ writel(mapping[i].size, &dev->local->rx_mapping[i].size);
}
return 0;
}
@@ -587,12 +620,10 @@ int vlynq_set_remote_mapping(struct vlyn
if (!dev->enabled)
return -ENXIO;
- vlynq_reg_write(dev->remote->tx_offset, tx_offset);
+ writel(tx_offset, &dev->remote->tx_offset);
for (i = 0; i < 4; i++) {
- vlynq_reg_write(dev->remote->rx_mapping[i].offset,
- mapping[i].offset);
- vlynq_reg_write(dev->remote->rx_mapping[i].size,
- mapping[i].size);
+ writel(mapping[i].offset, &dev->remote->rx_mapping[i].offset);
+ writel(mapping[i].size, &dev->remote->rx_mapping[i].size);
}
return 0;
}
@@ -662,8 +693,7 @@ static int vlynq_probe(struct platform_d
dev->id = pdev->id;
dev->dev.bus = &vlynq_bus_type;
dev->dev.parent = &pdev->dev;
- snprintf(dev->dev.bus_id, BUS_ID_SIZE, "vlynq%d", dev->id);
- dev->dev.bus_id[BUS_ID_SIZE - 1] = 0;
+ dev_set_name(&dev->dev, "vlynq%d", dev->id);
dev->dev.platform_data = pdev->dev.platform_data;
dev->dev.release = vlynq_device_release;
@@ -673,9 +703,9 @@ static int vlynq_probe(struct platform_d
dev->mem_end = mem_res->end;
len = regs_res->end - regs_res->start;
- if (!request_mem_region(regs_res->start, len, dev->dev.bus_id)) {
+ if (!request_mem_region(regs_res->start, len, dev_name(&dev->dev))) {
printk(KERN_ERR "%s: Can't request vlynq registers\n",
- dev->dev.bus_id);
+ dev_name(&dev->dev));
result = -ENXIO;
goto fail_request;
}
@@ -683,7 +713,7 @@ static int vlynq_probe(struct platform_d
dev->local = ioremap(regs_res->start, len);
if (!dev->local) {
printk(KERN_ERR "%s: Can't remap vlynq registers\n",
- dev->dev.bus_id);
+ dev_name(&dev->dev));
result = -ENXIO;
goto fail_remap;
}
@@ -702,14 +732,14 @@ static int vlynq_probe(struct platform_d
platform_set_drvdata(pdev, dev);
printk(KERN_INFO "%s: regs 0x%p, irq %d, mem 0x%p\n",
- dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
+ dev_name(&dev->dev), (void *)dev->regs_start, dev->irq,
(void *)dev->mem_start);
dev->dev_id = 0;
dev->divisor = vlynq_div_auto;
result = __vlynq_enable_device(dev);
if (result == 0) {
- dev->dev_id = vlynq_reg_read(dev->remote->chip);
+ dev->dev_id = readl(&dev->remote->chip);
((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev);
}
if (dev->dev_id)
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