SDTI: Add netlink support for debug message output.

Add support for user to use netlink for message output to XTI.
Add autoidle feature if SDTI is not used.
Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/misc/sti/Makefile

@@ -2,7 +2,7 @@ ifeq ($(CONFIG_ARCH_OMAP3),y)
 obj-$(CONFIG_OMAP_STI)	+= sdti.o
 else
 obj-$(CONFIG_OMAP_STI)	+= sti.o sti-fifo.o
-obj-$(CONFIG_NET)	+= sti-netlink.o
 endif
 
+obj-$(CONFIG_NET)	+= sti-netlink.o
 obj-$(CONFIG_OMAP_STI_CONSOLE)	+= sti-console.o

drivers/misc/sti/sdti.c

@@ -31,11 +31,14 @@
 #define CPU1_TRACE_EN		0x01
 #define CPU2_TRACE_EN		0x02
 
+#define SDTI_SYSCONFIG_SOFTRESET	(1 << 1)
+#define SDTI_SYSCONFIG_AUTOIDLE		(1 << 0)
+
 static struct clk *sdti_ck;
 void __iomem *sti_base, *sti_channel_base;
 static DEFINE_SPINLOCK(sdti_lock);
 
-void omap_sti_channel_write_trace(int len, int id, void *data,
+void sti_channel_write_trace(int len, int id, void *data,
 				unsigned int channel)
 {
 	const u8 *tpntr = data;
@@ -49,13 +52,13 @@ void omap_sti_channel_write_trace(int len, int id, void *data,
 
 	spin_unlock_irq(&sdti_lock);
 }
-EXPORT_SYMBOL(omap_sti_channel_write_trace);
+EXPORT_SYMBOL(sti_channel_write_trace);
 
 static void omap_sdti_reset(void)
 {
 	int i;
 
-	sti_writel(0x02, SDTI_SYSCONFIG);
+	sti_writel(SDTI_SYSCONFIG_SOFTRESET, SDTI_SYSCONFIG);
 
 	for (i = 0; i < 10000; i++)
 		if (sti_readl(SDTI_SYSSTATUS) & 1)
@@ -79,6 +82,9 @@ static int __init omap_sdti_init(void)
 	omap_sdti_reset();
 	sti_writel(0xC5ACCE55, SDTI_LOCK_ACCESS);
 
+	/* Autoidle */
+	sti_writel(SDTI_SYSCONFIG_AUTOIDLE, SDTI_SYSCONFIG);
+
 	/* Claim SDTI */
 	sti_writel(1 << 30, SDTI_WINCTRL);
 	i = sti_readl(SDTI_WINCTRL);
@@ -99,7 +105,7 @@ static int __init omap_sdti_init(void)
 	snprintf(buf, sizeof(buf), "OMAP SDTI support loaded (HW v%u.%u)\n",
 		(i >> 4) & 0x0f, i & 0x0f);
 	printk(KERN_INFO "%s", buf);
-	omap_sti_channel_write_trace(strlen(buf), 0xc3, buf, 239);
+	sti_channel_write_trace(strlen(buf), 0xc3, buf, 239);
 
 	return 0;
 }

drivers/misc/sti/sti-netlink.c

@@ -25,6 +25,7 @@ enum {
 	STI_WRITE,
 };
 
+#if defined(CONFIG_ARCH_OMAP1) || defined(CONFIG_ARCH_OMAP2)
 static int sti_netlink_read(int pid, int seq, void *payload, int size)
 {
 	struct sk_buff *skb;
@@ -55,6 +56,7 @@ nlmsg_failure:
 
 	return -EINVAL;
 }
+#endif
 
 /*
  * We abuse nlmsg_type and nlmsg_flags for our purposes.
@@ -66,7 +68,7 @@ static int sti_netlink_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
 	void *data;
 	u8 chan, id;
-	int size, ret = 0, len = 0;
+	int size, ret = 0;
 
 	data	= NLMSG_DATA(nlh);
 	chan	= (nlh->nlmsg_flags >> 8) & 0xff;
@@ -77,7 +79,10 @@ static int sti_netlink_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	case STI_WRITE:
 		sti_channel_write_trace(size, id, data, chan);
 		break;
+#if defined(CONFIG_ARCH_OMAP1) || defined(CONFIG_ARCH_OMAP2)
 	case STI_READ:
+		int len = 0;
+
 		data = kmalloc(size, GFP_KERNEL);
 		if (!data)
 			return -ENOMEM;
@@ -88,6 +93,7 @@ static int sti_netlink_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 				       data, len);
 		kfree(data);
 		break;
+#endif
 	default:
 		return -ENOTTY;
 	}