mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-18 19:20:37 +02:00
9d66bfa760
Handle the different vlynq device versions, and make the vlynq code more in line with the original vlynq implementation. Patch from Daniel Gimpelevich. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33755 3c298f89-4303-0410-b956-a3cf2f4a3e73
301 lines
8.3 KiB
Diff
301 lines
8.3 KiB
Diff
--- a/drivers/vlynq/vlynq.c
|
|
+++ b/drivers/vlynq/vlynq.c
|
|
@@ -119,20 +119,40 @@ static int vlynq_linked(struct vlynq_dev
|
|
return 0;
|
|
}
|
|
|
|
+static volatile int vlynq_delay_value_new = 0;
|
|
+
|
|
+static void vlynq_delay_wait(u32 count)
|
|
+{
|
|
+ /* Code adopted from original vlynq driver */
|
|
+ int i = 0;
|
|
+ volatile int *ptr = &vlynq_delay_value_new;
|
|
+ *ptr = 0;
|
|
+
|
|
+ /* We are assuming that the each cycle takes about
|
|
+ * 23 assembly instructions. */
|
|
+ for(i = 0; i < (count + 23)/23; i++)
|
|
+ *ptr = *ptr + 1;
|
|
+}
|
|
+
|
|
static void vlynq_reset(struct vlynq_device *dev)
|
|
{
|
|
+ u32 rtm = readl(&dev->local->revision);
|
|
+
|
|
+ rtm = rtm < 0x00010205 || readl(&dev->local->status) & 0x800 == 0 ?
|
|
+ 0 : 0x600000;
|
|
+
|
|
writel(readl(&dev->local->control) | VLYNQ_CTRL_RESET,
|
|
&dev->local->control);
|
|
|
|
/* Wait for the devices to finish resetting */
|
|
- msleep(5);
|
|
+ vlynq_delay_wait(0xffffff);
|
|
|
|
/* Remove reset bit */
|
|
- writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET,
|
|
+ writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET | rtm,
|
|
&dev->local->control);
|
|
|
|
/* Give some time for the devices to settle */
|
|
- msleep(5);
|
|
+ vlynq_delay_wait(0xffffff);
|
|
}
|
|
|
|
static void vlynq_irq_unmask(struct irq_data *d)
|
|
@@ -379,6 +399,61 @@ void vlynq_unregister_driver(struct vlyn
|
|
}
|
|
EXPORT_SYMBOL(vlynq_unregister_driver);
|
|
|
|
+enum vlynq_clk_src {
|
|
+ vlynq_clk_external,
|
|
+ vlynq_clk_local,
|
|
+ vlynq_clk_remote,
|
|
+ vlynq_clk_invalid,
|
|
+};
|
|
+
|
|
+static int __vlynq_set_clocks(struct vlynq_device *dev,
|
|
+ enum vlynq_clk_src clk_dir,
|
|
+ int lclk_div, int rclk_div)
|
|
+{
|
|
+ u32 reg;
|
|
+
|
|
+ if (clk_dir == vlynq_clk_invalid) {
|
|
+ printk(KERN_ERR "%s: attempt to set invalid clocking\n",
|
|
+ dev_name(&dev->dev));
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ reg = readl(&dev->local->control);
|
|
+ if (readl(&dev->local->revision) < 0x00010205) {
|
|
+ if (clk_dir & vlynq_clk_local)
|
|
+ reg |= VLYNQ_CTRL_CLOCK_INT;
|
|
+ else
|
|
+ reg &= ~VLYNQ_CTRL_CLOCK_INT;
|
|
+ }
|
|
+ reg &= ~VLYNQ_CTRL_CLOCK_MASK;
|
|
+ reg |= VLYNQ_CTRL_CLOCK_DIV(lclk_div);
|
|
+ writel(reg, &dev->local->control);
|
|
+
|
|
+ if (!vlynq_linked(dev))
|
|
+ return -ENODEV;
|
|
+
|
|
+ printk(KERN_INFO "%s: local VLYNQ protocol rev. is 0x%08x\n",
|
|
+ dev_name(&dev->dev), readl(&dev->local->revision));
|
|
+ printk(KERN_INFO "%s: remote VLYNQ protocol rev. is 0x%08x\n",
|
|
+ dev_name(&dev->dev), readl(&dev->remote->revision));
|
|
+
|
|
+ reg = readl(&dev->remote->control);
|
|
+ if (readl(&dev->remote->revision) < 0x00010205) {
|
|
+ if (clk_dir & vlynq_clk_remote)
|
|
+ reg |= VLYNQ_CTRL_CLOCK_INT;
|
|
+ else
|
|
+ reg &= ~VLYNQ_CTRL_CLOCK_INT;
|
|
+ }
|
|
+ reg &= ~VLYNQ_CTRL_CLOCK_MASK;
|
|
+ reg |= VLYNQ_CTRL_CLOCK_DIV(rclk_div);
|
|
+ writel(reg, &dev->remote->control);
|
|
+
|
|
+ if (!vlynq_linked(dev))
|
|
+ return -ENODEV;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
/*
|
|
* A VLYNQ remote device can clock the VLYNQ bus master
|
|
* using a dedicated clock line. In that case, both the
|
|
@@ -392,29 +467,16 @@ static int __vlynq_try_remote(struct vly
|
|
int i;
|
|
|
|
vlynq_reset(dev);
|
|
- for (i = dev->dev_id ? vlynq_rdiv2 : vlynq_rdiv8; dev->dev_id ?
|
|
- i <= vlynq_rdiv8 : i >= vlynq_rdiv2;
|
|
- dev->dev_id ? i++ : i--) {
|
|
+ for (i = 0; i <= 7; i++) {
|
|
|
|
if (!vlynq_linked(dev))
|
|
break;
|
|
|
|
- writel((readl(&dev->remote->control) &
|
|
- ~VLYNQ_CTRL_CLOCK_MASK) |
|
|
- VLYNQ_CTRL_CLOCK_INT |
|
|
- 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),
|
|
- &dev->local->control);
|
|
-
|
|
- if (vlynq_linked(dev)) {
|
|
- printk(KERN_DEBUG
|
|
- "%s: using remote clock divisor %d\n",
|
|
- dev_name(&dev->dev), i - vlynq_rdiv1 + 1);
|
|
- dev->divisor = i;
|
|
+ if (!__vlynq_set_clocks(dev, vlynq_clk_remote, i, i)) {
|
|
+ printk(KERN_INFO
|
|
+ "%s: using remote clock divisor %d\n",
|
|
+ dev_name(&dev->dev), i + 1);
|
|
+ dev->divisor = i + vlynq_rdiv1;
|
|
return 0;
|
|
} else {
|
|
vlynq_reset(dev);
|
|
@@ -433,25 +495,17 @@ static int __vlynq_try_remote(struct vly
|
|
*/
|
|
static int __vlynq_try_local(struct vlynq_device *dev)
|
|
{
|
|
- int i;
|
|
+ int i, dir = !dev->dev_id;
|
|
|
|
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--) {
|
|
-
|
|
- writel((readl(&dev->local->control) &
|
|
- ~VLYNQ_CTRL_CLOCK_MASK) |
|
|
- VLYNQ_CTRL_CLOCK_INT |
|
|
- 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_name(&dev->dev), i - vlynq_ldiv1 + 1);
|
|
- dev->divisor = i;
|
|
+ for (i = dir ? 7 : 0; dir ? i >= 0 : i <= 7; dir ? i-- : i++) {
|
|
+
|
|
+ if (!__vlynq_set_clocks(dev, vlynq_clk_local, i, 0)) {
|
|
+ printk(KERN_INFO
|
|
+ "%s: using local clock divisor %d\n",
|
|
+ dev_name(&dev->dev), i + 1);
|
|
+ dev->divisor = i + vlynq_ldiv1;
|
|
return 0;
|
|
} else {
|
|
vlynq_reset(dev);
|
|
@@ -473,18 +527,10 @@ static int __vlynq_try_external(struct v
|
|
if (!vlynq_linked(dev))
|
|
return -ENODEV;
|
|
|
|
- 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_name(&dev->dev));
|
|
- dev->divisor = vlynq_div_external;
|
|
+ if (!__vlynq_set_clocks(dev, vlynq_clk_external, 0, 0)) {
|
|
+ printk(KERN_INFO "%s: using external clock\n",
|
|
+ dev_name(&dev->dev));
|
|
+ dev->divisor = vlynq_div_external;
|
|
return 0;
|
|
}
|
|
|
|
@@ -501,24 +547,16 @@ static int __vlynq_enable_device(struct
|
|
return result;
|
|
|
|
switch (dev->divisor) {
|
|
- 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) && readl(&dev->remote->control) &
|
|
- VLYNQ_CTRL_CLOCK_INT) {
|
|
- if (!__vlynq_try_remote(dev) ||
|
|
- !__vlynq_try_local(dev) ||
|
|
- !__vlynq_try_external(dev))
|
|
- return 0;
|
|
- } else {
|
|
- if (!__vlynq_try_external(dev) ||
|
|
- !__vlynq_try_local(dev) ||
|
|
- !__vlynq_try_remote(dev))
|
|
- return 0;
|
|
- }
|
|
+ if (!__vlynq_try_remote(dev) || !__vlynq_try_local(dev))
|
|
+ return 0;
|
|
+ case vlynq_div_external:
|
|
+ if (!__vlynq_try_external(dev))
|
|
+ return 0;
|
|
break;
|
|
case vlynq_ldiv1:
|
|
case vlynq_ldiv2:
|
|
@@ -528,15 +566,12 @@ static int __vlynq_enable_device(struct
|
|
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_name(&dev->dev),
|
|
- dev->divisor - vlynq_ldiv1 + 1);
|
|
+ if (!__vlynq_set_clocks(dev, vlynq_clk_local, dev->divisor -
|
|
+ vlynq_ldiv1, 0)) {
|
|
+ printk(KERN_INFO
|
|
+ "%s: using local clock divisor %d\n",
|
|
+ dev_name(&dev->dev),
|
|
+ dev->divisor - vlynq_ldiv1 + 1);
|
|
return 0;
|
|
}
|
|
break;
|
|
@@ -548,20 +583,17 @@ static int __vlynq_enable_device(struct
|
|
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_name(&dev->dev),
|
|
- dev->divisor - vlynq_rdiv1 + 1);
|
|
+ if (!__vlynq_set_clocks(dev, vlynq_clk_remote, 0,
|
|
+ dev->divisor - vlynq_rdiv1)) {
|
|
+ printk(KERN_INFO
|
|
+ "%s: using remote clock divisor %d\n",
|
|
+ dev_name(&dev->dev),
|
|
+ dev->divisor - vlynq_rdiv1 + 1);
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
-
|
|
+ vlynq_reset(dev);
|
|
ops->off(dev);
|
|
return -ENODEV;
|
|
}
|
|
@@ -732,14 +764,14 @@ 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_name(&dev->dev), (void *)dev->regs_start, dev->irq,
|
|
- (void *)dev->mem_start);
|
|
+ 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) {
|
|
+ if (!__vlynq_enable_device(dev)) {
|
|
dev->dev_id = readl(&dev->remote->chip);
|
|
+ vlynq_reset(dev);
|
|
((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev);
|
|
}
|
|
if (dev->dev_id)
|