mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-25 22:15:30 +02:00
3106c18113
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17110 3c298f89-4303-0410-b956-a3cf2f4a3e73
549 lines
17 KiB
Diff
549 lines
17 KiB
Diff
--- a/drivers/vlynq/vlynq.c
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+++ b/drivers/vlynq/vlynq.c
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@@ -14,6 +14,9 @@
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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+ *
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+ * Parts of the VLYNQ specification can be found here:
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+ * http://www.ti.com/litv/pdf/sprue36a
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*/
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#include <linux/init.h>
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@@ -25,7 +28,6 @@
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#include <linux/errno.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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-#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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@@ -73,15 +75,11 @@ struct vlynq_regs {
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u32 int_device[8];
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};
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-#define vlynq_reg_read(reg) readl(&(reg))
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-#define vlynq_reg_write(reg, val) writel(val, &(reg))
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-
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-static int __vlynq_enable_device(struct vlynq_device *dev);
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-
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-#ifdef VLYNQ_DEBUG
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+#ifdef CONFIG_VLYNQ_DEBUG
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static void vlynq_dump_regs(struct vlynq_device *dev)
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{
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int i;
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+
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printk(KERN_DEBUG "VLYNQ local=%p remote=%p\n",
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dev->local, dev->remote);
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for (i = 0; i < 32; i++) {
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@@ -95,20 +93,23 @@ static void vlynq_dump_regs(struct vlynq
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static void vlynq_dump_mem(u32 *base, int count)
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{
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int i;
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+
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for (i = 0; i < (count + 3) / 4; i++) {
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- if (i % 4 == 0) printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
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+ if (i % 4 == 0)
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+ printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
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printk(KERN_DEBUG " 0x%08x", *(base + i));
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}
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printk(KERN_DEBUG "\n");
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}
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#endif
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-int vlynq_linked(struct vlynq_device *dev)
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+/* Check the VLYNQ link status with a given device */
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+static int vlynq_linked(struct vlynq_device *dev)
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{
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int i;
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for (i = 0; i < 100; i++)
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- if (vlynq_reg_read(dev->local->status) & VLYNQ_STATUS_LINK)
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+ if (readl(&dev->local->status) & VLYNQ_STATUS_LINK)
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return 1;
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else
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cpu_relax();
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@@ -118,17 +119,15 @@ int vlynq_linked(struct vlynq_device *de
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static void vlynq_reset(struct vlynq_device *dev)
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{
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- vlynq_reg_write(dev->local->control,
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- vlynq_reg_read(dev->local->control) |
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- VLYNQ_CTRL_RESET);
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+ writel(readl(&dev->local->control) | VLYNQ_CTRL_RESET,
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+ &dev->local->control);
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/* Wait for the devices to finish resetting */
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msleep(5);
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/* Remove reset bit */
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- vlynq_reg_write(dev->local->control,
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- vlynq_reg_read(dev->local->control) &
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- ~VLYNQ_CTRL_RESET);
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+ writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET,
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+ &dev->local->control);
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/* Give some time for the devices to settle */
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msleep(5);
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@@ -142,9 +141,9 @@ static void vlynq_irq_unmask(unsigned in
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BUG_ON(!dev);
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virq = irq - dev->irq_start;
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- val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
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+ val = readl(&dev->remote->int_device[virq >> 2]);
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val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
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- vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
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+ writel(val, &dev->remote->int_device[virq >> 2]);
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}
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static void vlynq_irq_mask(unsigned int irq)
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@@ -155,9 +154,9 @@ static void vlynq_irq_mask(unsigned int
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BUG_ON(!dev);
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virq = irq - dev->irq_start;
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- val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
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+ val = readl(&dev->remote->int_device[virq >> 2]);
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val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
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- vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
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+ writel(val, &dev->remote->int_device[virq >> 2]);
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}
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static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
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@@ -168,7 +167,7 @@ static int vlynq_irq_type(unsigned int i
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BUG_ON(!dev);
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virq = irq - dev->irq_start;
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- val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
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+ val = readl(&dev->remote->int_device[virq >> 2]);
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switch (flow_type & IRQ_TYPE_SENSE_MASK) {
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case IRQ_TYPE_EDGE_RISING:
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case IRQ_TYPE_EDGE_FALLING:
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@@ -187,28 +186,30 @@ static int vlynq_irq_type(unsigned int i
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default:
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return -EINVAL;
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}
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- vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
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+ writel(val, &dev->remote->int_device[virq >> 2]);
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return 0;
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}
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static void vlynq_local_ack(unsigned int irq)
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{
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struct vlynq_device *dev = get_irq_chip_data(irq);
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- u32 status = vlynq_reg_read(dev->local->status);
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- if (printk_ratelimit())
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- printk(KERN_DEBUG "%s: local status: 0x%08x\n",
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- dev->dev.bus_id, status);
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- vlynq_reg_write(dev->local->status, status);
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+
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+ u32 status = readl(&dev->local->status);
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+
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+ pr_debug("%s: local status: 0x%08x\n",
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+ dev_name(&dev->dev), status);
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+ writel(status, &dev->local->status);
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}
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static void vlynq_remote_ack(unsigned int irq)
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{
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struct vlynq_device *dev = get_irq_chip_data(irq);
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- u32 status = vlynq_reg_read(dev->remote->status);
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- if (printk_ratelimit())
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- printk(KERN_DEBUG "%s: remote status: 0x%08x\n",
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- dev->dev.bus_id, status);
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- vlynq_reg_write(dev->remote->status, status);
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+
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+ u32 status = readl(&dev->remote->status);
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+
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+ pr_debug("%s: remote status: 0x%08x\n",
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+ dev_name(&dev->dev), status);
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+ writel(status, &dev->remote->status);
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}
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static irqreturn_t vlynq_irq(int irq, void *dev_id)
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@@ -217,8 +218,8 @@ static irqreturn_t vlynq_irq(int irq, vo
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u32 status;
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int virq = 0;
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- status = vlynq_reg_read(dev->local->int_status);
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- vlynq_reg_write(dev->local->int_status, status);
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+ status = readl(&dev->local->int_status);
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+ writel(status, &dev->local->int_status);
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if (unlikely(!status))
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spurious_interrupt();
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@@ -262,28 +263,28 @@ static int vlynq_setup_irq(struct vlynq_
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if (dev->local_irq == dev->remote_irq) {
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printk(KERN_ERR
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"%s: local vlynq irq should be different from remote\n",
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- dev->dev.bus_id);
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+ dev_name(&dev->dev));
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return -EINVAL;
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}
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/* Clear local and remote error bits */
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- vlynq_reg_write(dev->local->status, vlynq_reg_read(dev->local->status));
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- vlynq_reg_write(dev->remote->status,
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- vlynq_reg_read(dev->remote->status));
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+ writel(readl(&dev->local->status), &dev->local->status);
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+ writel(readl(&dev->remote->status), &dev->remote->status);
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/* Now setup interrupts */
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val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
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val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
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VLYNQ_CTRL_INT2CFG;
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- val |= vlynq_reg_read(dev->local->control);
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- vlynq_reg_write(dev->local->int_ptr, VLYNQ_INT_OFFSET);
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- vlynq_reg_write(dev->local->control, val);
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+ val |= readl(&dev->local->control);
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+ writel(VLYNQ_INT_OFFSET, &dev->local->int_ptr);
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+ writel(val, &dev->local->control);
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val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
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val |= VLYNQ_CTRL_INT_ENABLE;
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- val |= vlynq_reg_read(dev->remote->control);
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- vlynq_reg_write(dev->remote->int_ptr, VLYNQ_INT_OFFSET);
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- vlynq_reg_write(dev->remote->control, val);
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+ val |= readl(&dev->remote->control);
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+ writel(VLYNQ_INT_OFFSET, &dev->remote->int_ptr);
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+ writel(val, &dev->remote->int_ptr);
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+ writel(val, &dev->remote->control);
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for (i = dev->irq_start; i <= dev->irq_end; i++) {
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virq = i - dev->irq_start;
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@@ -299,12 +300,13 @@ static int vlynq_setup_irq(struct vlynq_
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set_irq_chip_and_handler(i, &vlynq_irq_chip,
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handle_simple_irq);
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set_irq_chip_data(i, dev);
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- vlynq_reg_write(dev->remote->int_device[virq >> 2], 0);
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+ writel(0, &dev->remote->int_device[virq >> 2]);
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}
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}
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if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) {
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- printk(KERN_ERR "%s: request_irq failed\n", dev->dev.bus_id);
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+ printk(KERN_ERR "%s: request_irq failed\n",
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+ dev_name(&dev->dev));
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return -EAGAIN;
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}
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@@ -328,11 +330,11 @@ static int vlynq_device_match(struct dev
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if (ids->id == vdev->dev_id) {
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vdev->divisor = ids->divisor;
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vlynq_set_drvdata(vdev, ids);
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- printk(KERN_INFO "Driver found for VLYNQ " \
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+ printk(KERN_INFO "Driver found for VLYNQ "
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"device: %08x\n", vdev->dev_id);
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return 1;
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}
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- printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver" \
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+ printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver"
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" for VLYNQ device: %08x\n", ids->id, vdev->dev_id);
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ids++;
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}
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@@ -346,8 +348,7 @@ static int vlynq_device_probe(struct dev
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struct vlynq_device_id *id = vlynq_get_drvdata(vdev);
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int result = -ENODEV;
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- get_device(dev);
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- if (drv && drv->probe)
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+ if (drv->probe)
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result = drv->probe(vdev, id);
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if (result)
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put_device(dev);
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@@ -357,9 +358,10 @@ static int vlynq_device_probe(struct dev
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static int vlynq_device_remove(struct device *dev)
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{
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struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
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- if (drv && drv->remove)
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+
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+ if (drv->remove)
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drv->remove(to_vlynq_device(dev));
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- put_device(dev);
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+
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return 0;
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}
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@@ -377,6 +379,14 @@ void vlynq_unregister_driver(struct vlyn
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}
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EXPORT_SYMBOL(vlynq_unregister_driver);
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+/*
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+ * A VLYNQ remote device can clock the VLYNQ bus master
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+ * using a dedicated clock line. In that case, both the
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+ * remove device and the bus master should have the same
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+ * serial clock dividers configured. Iterate through the
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+ * 8 possible dividers until we actually link with the
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+ * device.
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+ */
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static int __vlynq_try_remote(struct vlynq_device *dev)
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{
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int i;
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@@ -389,21 +399,21 @@ static int __vlynq_try_remote(struct vly
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if (!vlynq_linked(dev))
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break;
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- vlynq_reg_write(dev->remote->control,
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- (vlynq_reg_read(dev->remote->control) &
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+ writel((readl(&dev->remote->control) &
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~VLYNQ_CTRL_CLOCK_MASK) |
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VLYNQ_CTRL_CLOCK_INT |
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- VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1));
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- vlynq_reg_write(dev->local->control,
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- ((vlynq_reg_read(dev->local->control)
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+ VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
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+ &dev->remote->control);
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+ writel((readl(&dev->local->control)
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& ~(VLYNQ_CTRL_CLOCK_INT |
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VLYNQ_CTRL_CLOCK_MASK)) |
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- VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1)));
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+ VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
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+ &dev->local->control);
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if (vlynq_linked(dev)) {
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printk(KERN_DEBUG
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"%s: using remote clock divisor %d\n",
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- dev->dev.bus_id, i - vlynq_rdiv1 + 1);
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+ dev_name(&dev->dev), i - vlynq_rdiv1 + 1);
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dev->divisor = i;
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return 0;
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} else {
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@@ -414,26 +424,33 @@ static int __vlynq_try_remote(struct vly
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return -ENODEV;
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}
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+/*
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+ * A VLYNQ remote device can be clocked by the VLYNQ bus
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+ * master using a dedicated clock line. In that case, only
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+ * the bus master configures the serial clock divider.
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+ * Iterate through the 8 possible dividers until we
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+ * actually get a link with the device.
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+ */
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static int __vlynq_try_local(struct vlynq_device *dev)
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{
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int i;
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-
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+
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vlynq_reset(dev);
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for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ?
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i <= vlynq_ldiv8 : i >= vlynq_ldiv2;
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dev->dev_id ? i++ : i--) {
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- vlynq_reg_write(dev->local->control,
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- (vlynq_reg_read(dev->local->control) &
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+ writel((readl(&dev->local->control) &
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~VLYNQ_CTRL_CLOCK_MASK) |
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VLYNQ_CTRL_CLOCK_INT |
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- VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1));
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+ VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1),
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+ &dev->local->control);
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if (vlynq_linked(dev)) {
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printk(KERN_DEBUG
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"%s: using local clock divisor %d\n",
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- dev->dev.bus_id, i - vlynq_ldiv1 + 1);
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+ dev_name(&dev->dev), i - vlynq_ldiv1 + 1);
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dev->divisor = i;
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return 0;
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} else {
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@@ -444,27 +461,33 @@ static int __vlynq_try_local(struct vlyn
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return -ENODEV;
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}
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+/*
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+ * When using external clocking method, serial clock
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+ * is supplied by an external oscillator, therefore we
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+ * should mask the local clock bit in the clock control
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+ * register for both the bus master and the remote device.
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+ */
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static int __vlynq_try_external(struct vlynq_device *dev)
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{
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vlynq_reset(dev);
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if (!vlynq_linked(dev))
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return -ENODEV;
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- vlynq_reg_write(dev->remote->control,
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- (vlynq_reg_read(dev->remote->control) &
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- ~VLYNQ_CTRL_CLOCK_INT));
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-
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- vlynq_reg_write(dev->local->control,
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- (vlynq_reg_read(dev->local->control) &
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- ~VLYNQ_CTRL_CLOCK_INT));
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+ writel((readl(&dev->remote->control) &
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+ ~VLYNQ_CTRL_CLOCK_INT),
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+ &dev->remote->control);
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+
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+ writel((readl(&dev->local->control) &
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+ ~VLYNQ_CTRL_CLOCK_INT),
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+ &dev->local->control);
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if (vlynq_linked(dev)) {
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printk(KERN_DEBUG "%s: using external clock\n",
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- dev->dev.bus_id);
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+ dev_name(&dev->dev));
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dev->divisor = vlynq_div_external;
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return 0;
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}
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-
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+
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return -ENODEV;
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}
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@@ -481,10 +504,10 @@ static int __vlynq_enable_device(struct
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case vlynq_div_external:
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case vlynq_div_auto:
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/* When the device is brought from reset it should have clock
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- generation negotiated by hardware.
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- Check which device is generating clocks and perform setup
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- accordingly */
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- if (vlynq_linked(dev) && vlynq_reg_read(dev->remote->control) &
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+ * generation negotiated by hardware.
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+ * Check which device is generating clocks and perform setup
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+ * accordingly */
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+ if (vlynq_linked(dev) && readl(&dev->remote->control) &
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VLYNQ_CTRL_CLOCK_INT) {
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if (!__vlynq_try_remote(dev) ||
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!__vlynq_try_local(dev) ||
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@@ -497,31 +520,43 @@ static int __vlynq_enable_device(struct
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return 0;
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}
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break;
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- case vlynq_ldiv1: case vlynq_ldiv2: case vlynq_ldiv3: case vlynq_ldiv4:
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- case vlynq_ldiv5: case vlynq_ldiv6: case vlynq_ldiv7: case vlynq_ldiv8:
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- vlynq_reg_write(dev->local->control,
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- VLYNQ_CTRL_CLOCK_INT |
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- VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
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- vlynq_ldiv1));
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- vlynq_reg_write(dev->remote->control, 0);
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+ case vlynq_ldiv1:
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+ case vlynq_ldiv2:
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+ case vlynq_ldiv3:
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+ case vlynq_ldiv4:
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+ case vlynq_ldiv5:
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+ case vlynq_ldiv6:
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+ case vlynq_ldiv7:
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+ case vlynq_ldiv8:
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+ 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)
|