* adds a rewrite of the tapi drivers + sip app. this is the result of lars' gsoc 2010 project, Thanks !

SVN-Revision: 23840

1 files changed, 157 insertions, 0 deletions

diff --git a/package/lqtapi/src/mps/mps-irq.c b/package/lqtapi/src/mps/mps-irq.c
new file mode 100644
index 0000000000..8da0c00c78
--- /dev/null
+++ b/package/lqtapi/src/mps/mps-irq.c
@@ -0,0 +1,157 @@
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <ifxmips_irq.h>
+
+#include "mps.h"
+#include "mps-irq.h"
+
+#define MPS_REG_AD0_IRQ_BASE	0x40
+#define MPS_REG_AD1_IRQ_BASE	0x44
+
+#define MPS_REG_AD_IRQ_STATUS	0x00
+#define MPS_REG_AD_IRQ_SET	0x08
+#define MPS_REG_AD_IRQ_CLEAR	0x10
+#define MPS_REG_AD_IRQ_ENABLE	0x18
+
+struct mps_irq_desc
+{
+    void __iomem *base;
+    unsigned int irq_base;
+};
+
+static inline unsigned int mps_irq_bit(struct mps_irq_desc *mps_desc, int irq)
+{
+	return BIT(irq - mps_desc->irq_base);
+}
+
+static void mps_irq_ack(unsigned int irq)
+{
+	struct mps_irq_desc *mps_desc = get_irq_chip_data(irq);
+
+	__raw_writel(mps_irq_bit(mps_desc, irq),
+		mps_desc->base + MPS_REG_AD_IRQ_CLEAR);
+}
+
+static void mps_irq_mask(unsigned int irq)
+{
+	struct mps_irq_desc *mps_desc = get_irq_chip_data(irq);
+	uint32_t mask;
+
+	mask = __raw_readl(mps_desc->base + MPS_REG_AD_IRQ_ENABLE);
+	mask &= ~mps_irq_bit(mps_desc, irq);
+	__raw_writel(mask, mps_desc->base + MPS_REG_AD_IRQ_ENABLE);
+}
+
+static void mps_irq_unmask(unsigned int irq)
+{
+	struct mps_irq_desc *mps_desc = get_irq_chip_data(irq);
+	uint32_t mask;
+
+	mask = __raw_readl(mps_desc->base + MPS_REG_AD_IRQ_ENABLE);
+	mask |= mps_irq_bit(mps_desc, irq) | 0xffff;
+	__raw_writel(mask, mps_desc->base + MPS_REG_AD_IRQ_ENABLE);
+}
+
+static struct irq_chip mps_irq_chip = {
+	.name = "mps",
+	.ack = mps_irq_ack,
+	.mask = mps_irq_mask,
+	.unmask = mps_irq_unmask,
+};
+
+static void mps_irq_demux_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct mps_irq_desc *mps_desc = get_irq_data(irq);
+	uint32_t val;
+	int mps_irq;
+
+	desc->chip->mask(irq);
+
+	val = __raw_readl(mps_desc->base + MPS_REG_AD_IRQ_STATUS);
+	mps_irq = ffs(val);
+
+/*	printk("irq: %d %x\n", mps_irq, val);*/
+
+	if (mps_irq > 16)
+	    printk("PANIC!\n");
+
+	if (mps_irq)
+		generic_handle_irq(mps_irq + mps_desc->irq_base - 1);
+
+	desc->chip->ack(irq);
+	desc->chip->unmask(irq);
+}
+
+#if 0
+
+static const uint32_t ring_msg[] = {
+0x01010004, 0x00030000,
+};
+
+static irqreturn_t mps_irq_ad0(int irq, void *devid)
+{
+    struct mps *mps = devid;
+    uint32_t val;
+
+    val = __raw_readl(mps->base + MPS_REG_AD0_IRQ_STATUS);
+    printk("WOHO ein IRQ: %x\n", val);
+    __raw_writel(val, mps->base + MPS_REG_AD0_IRQ_CLEAR);
+
+	if (val & BIT(MPS_IRQ_DOWNLOAD_DONE))
+		complete(&mps->init_completion);
+
+	if (val & BIT(MPS_IRQ_EVENT))
+		mps_fifo_in(&mps->mbox_cmd.downstream, ring_msg, ARRAY_SIZE(ring_msg));
+
+    return IRQ_HANDLED;
+}
+#endif
+
+#define MPS_NUM_AD_IRQS 32
+
+struct mps_irq_desc mps_irq_descs[2];
+
+int mps_irq_init(struct mps *mps)
+{
+	int ret = 0;
+	int irq;
+
+	mps_irq_descs[0].base = mps->base + MPS_REG_AD0_IRQ_BASE;
+	mps_irq_descs[0].irq_base = mps->irq_base;
+	mps_irq_descs[1].base = mps->base + MPS_REG_AD1_IRQ_BASE;
+	mps_irq_descs[1].irq_base = mps->irq_base + 16;
+
+
+	set_irq_data(mps->irq_ad0, &mps_irq_descs[0]);
+	set_irq_chained_handler(mps->irq_ad0, mps_irq_demux_handler);
+	set_irq_data(mps->irq_ad1, &mps_irq_descs[1]);
+	set_irq_chained_handler(mps->irq_ad1, mps_irq_demux_handler);
+
+/*
+	ret = request_irq(mps->irq_ad0, mps_irq_demux_handler, IRQF_DISABLED,
+		"mps ad0", &mps_irq_descs[0]);
+	ret = request_irq(mps->irq_ad1, mps_irq_demux_handler, IRQF_DISABLED,
+		"mps ad0", &mps_irq_descs[1]);
+*/
+	for (irq = 0; irq < MPS_NUM_AD_IRQS; ++irq) {
+	    set_irq_chip_data(irq + mps->irq_base, &mps_irq_descs[irq / 16]);
+	    set_irq_chip_and_handler(irq + mps->irq_base, &mps_irq_chip, handle_level_irq);
+	}
+
+
+/*
+	res = request_irq(INT_NUM_IM4_IRL18, mps_irq_ad0, IRQF_DISABLED,
+	    "mps ad0", mps);
+
+	irqs = BIT(MPS_IRQ_CMD_UPSTREAM) | BIT(MPS_IRQ_DATA_UPSTREAM)
+	 | BIT(MPS_IRQ_DOWNLOAD_DONE) | BIT(MPS_IRQ_EVENT) | BIT(MPS_IRQ_CMD_ERROR); 
+
+	 __raw_writel(irqs, mps->base + MPS_REG_AD0_IRQ_ENA);
+*/
+	return ret;
+}
+
+void mps_irq_exit(struct mps *mps)
+{
+	free_irq(INT_NUM_IM4_IRL18, mps);
+}