These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / irqchip / irq-renesas-h8s.c

diff --git a/kernel/drivers/irqchip/irq-renesas-h8s.c b/kernel/drivers/irqchip/irq-renesas-h8s.c
new file mode 100644 (file)
index 0000000..8098ead
--- /dev/null
+++ b/kernel/drivers/irqchip/irq-renesas-h8s.c
@@ -0,0 +1,101 @@
+/*
+ * H8S interrupt contoller driver
+ *
+ * Copyright 2015 Yoshinori Sato <ysato@users.sourceforge.jp>
+ */
+
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <asm/io.h>
+
+static void *intc_baseaddr;
+#define IPRA ((unsigned long)intc_baseaddr)
+
+static const unsigned char ipr_table[] = {
+       0x03, 0x02, 0x01, 0x00, 0x13, 0x12, 0x11, 0x10, /* 16 - 23 */
+       0x23, 0x22, 0x21, 0x20, 0x33, 0x32, 0x31, 0x30, /* 24 - 31 */
+       0x43, 0x42, 0x41, 0x40, 0x53, 0x53, 0x52, 0x52, /* 32 - 39 */
+       0x51, 0x51, 0x51, 0x51, 0x51, 0x51, 0x51, 0x51, /* 40 - 47 */
+       0x50, 0x50, 0x50, 0x50, 0x63, 0x63, 0x63, 0x63, /* 48 - 55 */
+       0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, /* 56 - 63 */
+       0x61, 0x61, 0x61, 0x61, 0x60, 0x60, 0x60, 0x60, /* 64 - 71 */
+       0x73, 0x73, 0x73, 0x73, 0x72, 0x72, 0x72, 0x72, /* 72 - 79 */
+       0x71, 0x71, 0x71, 0x71, 0x70, 0x83, 0x82, 0x81, /* 80 - 87 */
+       0x80, 0x80, 0x80, 0x80, 0x93, 0x93, 0x93, 0x93, /* 88 - 95 */
+       0x92, 0x92, 0x92, 0x92, 0x91, 0x91, 0x91, 0x91, /* 96 - 103 */
+       0x90, 0x90, 0x90, 0x90, 0xa3, 0xa3, 0xa3, 0xa3, /* 104 - 111 */
+       0xa2, 0xa2, 0xa2, 0xa2, 0xa1, 0xa1, 0xa1, 0xa1, /* 112 - 119 */
+       0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, 0xa0, /* 120 - 127 */
+};
+
+static void h8s_disable_irq(struct irq_data *data)
+{
+       int pos;
+       unsigned int addr;
+       unsigned short pri;
+       int irq = data->irq;
+
+       addr = IPRA + ((ipr_table[irq - 16] & 0xf0) >> 3);
+       pos = (ipr_table[irq - 16] & 0x0f) * 4;
+       pri = ~(0x000f << pos);
+       pri &= ctrl_inw(addr);
+       ctrl_outw(pri, addr);
+}
+
+static void h8s_enable_irq(struct irq_data *data)
+{
+       int pos;
+       unsigned int addr;
+       unsigned short pri;
+       int irq = data->irq;
+
+       addr = IPRA + ((ipr_table[irq - 16] & 0xf0) >> 3);
+       pos = (ipr_table[irq - 16] & 0x0f) * 4;
+       pri = ~(0x000f << pos);
+       pri &= ctrl_inw(addr);
+       pri |= 1 << pos;
+       ctrl_outw(pri, addr);
+}
+
+struct irq_chip h8s_irq_chip = {
+       .name           = "H8S-INTC",
+       .irq_enable     = h8s_enable_irq,
+       .irq_disable    = h8s_disable_irq,
+};
+
+static __init int irq_map(struct irq_domain *h, unsigned int virq,
+                         irq_hw_number_t hw_irq_num)
+{
+       irq_set_chip_and_handler(virq, &h8s_irq_chip, handle_simple_irq);
+
+       return 0;
+}
+
+static struct irq_domain_ops irq_ops = {
+       .map    = irq_map,
+       .xlate  = irq_domain_xlate_onecell,
+};
+
+static int __init h8s_intc_of_init(struct device_node *intc,
+                                  struct device_node *parent)
+{
+       struct irq_domain *domain;
+       int n;
+
+       intc_baseaddr = of_iomap(intc, 0);
+       BUG_ON(!intc_baseaddr);
+
+       /* All interrupt priority is 0 (disable) */
+       /* IPRA to IPRK */
+       for (n = 0; n <= 'k' - 'a'; n++)
+               ctrl_outw(0x0000, IPRA + (n * 2));
+
+       domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);
+       BUG_ON(!domain);
+       irq_set_default_host(domain);
+       return 0;
+}
+
+IRQCHIP_DECLARE(h8s_intc, "renesas,h8s-intc", h8s_intc_of_init);