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-rw-r--r--package/lqtapi/src/mps/mps-irq.c157
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 0000000..8da0c00
--- /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);
+}