# Makefile for the PowerPC 8xx linux kernel.
#
obj-y += m8xx_setup.o machine_check.o pic.o
-obj-$(CONFIG_CPM1) += cpm1.o
+obj-$(CONFIG_CPM1) += cpm1.o cpm1-ic.o
obj-$(CONFIG_UCODE_PATCH) += micropatch.o
obj-$(CONFIG_MPC885ADS) += mpc885ads_setup.o
obj-$(CONFIG_MPC86XADS) += mpc86xads_setup.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Interrupt controller for the
+ * Communication Processor Module.
+ * Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
+ */
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <asm/cpm1.h>
+
+static cpic8xx_t __iomem *cpic_reg;
+
+static struct irq_domain *cpm_pic_host;
+
+static void cpm_mask_irq(struct irq_data *d)
+{
+ unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
+
+ clrbits32(&cpic_reg->cpic_cimr, (1 << cpm_vec));
+}
+
+static void cpm_unmask_irq(struct irq_data *d)
+{
+ unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
+
+ setbits32(&cpic_reg->cpic_cimr, (1 << cpm_vec));
+}
+
+static void cpm_end_irq(struct irq_data *d)
+{
+ unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
+
+ out_be32(&cpic_reg->cpic_cisr, (1 << cpm_vec));
+}
+
+static struct irq_chip cpm_pic = {
+ .name = "CPM PIC",
+ .irq_mask = cpm_mask_irq,
+ .irq_unmask = cpm_unmask_irq,
+ .irq_eoi = cpm_end_irq,
+};
+
+int cpm_get_irq(void)
+{
+ int cpm_vec;
+
+ /*
+ * Get the vector by setting the ACK bit and then reading
+ * the register.
+ */
+ out_be16(&cpic_reg->cpic_civr, 1);
+ cpm_vec = in_be16(&cpic_reg->cpic_civr);
+ cpm_vec >>= 11;
+
+ return irq_linear_revmap(cpm_pic_host, cpm_vec);
+}
+
+static int cpm_pic_host_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ pr_debug("cpm_pic_host_map(%d, 0x%lx)\n", virq, hw);
+
+ irq_set_status_flags(virq, IRQ_LEVEL);
+ irq_set_chip_and_handler(virq, &cpm_pic, handle_fasteoi_irq);
+ return 0;
+}
+
+/*
+ * The CPM can generate the error interrupt when there is a race condition
+ * between generating and masking interrupts. All we have to do is ACK it
+ * and return. This is a no-op function so we don't need any special
+ * tests in the interrupt handler.
+ */
+static irqreturn_t cpm_error_interrupt(int irq, void *dev)
+{
+ return IRQ_HANDLED;
+}
+
+static const struct irq_domain_ops cpm_pic_host_ops = {
+ .map = cpm_pic_host_map,
+};
+
+unsigned int __init cpm_pic_init(void)
+{
+ struct device_node *np = NULL;
+ struct resource res;
+ unsigned int sirq = 0, hwirq, eirq;
+ int ret;
+
+ pr_debug("cpm_pic_init\n");
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,cpm1-pic");
+ if (np == NULL)
+ np = of_find_compatible_node(NULL, "cpm-pic", "CPM");
+ if (np == NULL) {
+ printk(KERN_ERR "CPM PIC init: can not find cpm-pic node\n");
+ return sirq;
+ }
+
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret)
+ goto end;
+
+ cpic_reg = ioremap(res.start, resource_size(&res));
+ if (cpic_reg == NULL)
+ goto end;
+
+ sirq = irq_of_parse_and_map(np, 0);
+ if (!sirq)
+ goto end;
+
+ /* Initialize the CPM interrupt controller. */
+ hwirq = (unsigned int)virq_to_hw(sirq);
+ out_be32(&cpic_reg->cpic_cicr,
+ (CICR_SCD_SCC4 | CICR_SCC_SCC3 | CICR_SCB_SCC2 | CICR_SCA_SCC1) |
+ ((hwirq/2) << 13) | CICR_HP_MASK);
+
+ out_be32(&cpic_reg->cpic_cimr, 0);
+
+ cpm_pic_host = irq_domain_add_linear(np, 64, &cpm_pic_host_ops, NULL);
+ if (cpm_pic_host == NULL) {
+ printk(KERN_ERR "CPM2 PIC: failed to allocate irq host!\n");
+ sirq = 0;
+ goto end;
+ }
+
+ /* Install our own error handler. */
+ np = of_find_compatible_node(NULL, NULL, "fsl,cpm1");
+ if (np == NULL)
+ np = of_find_node_by_type(NULL, "cpm");
+ if (np == NULL) {
+ printk(KERN_ERR "CPM PIC init: can not find cpm node\n");
+ goto end;
+ }
+
+ eirq = irq_of_parse_and_map(np, 0);
+ if (!eirq)
+ goto end;
+
+ if (request_irq(eirq, cpm_error_interrupt, IRQF_NO_THREAD, "error",
+ NULL))
+ printk(KERN_ERR "Could not allocate CPM error IRQ!");
+
+ setbits32(&cpic_reg->cpic_cicr, CICR_IEN);
+
+end:
+ of_node_put(np);
+ return sirq;
+}
cpm8xx_t __iomem *cpmp; /* Pointer to comm processor space */
immap_t __iomem *mpc8xx_immr = (void __iomem *)VIRT_IMMR_BASE;
-static cpic8xx_t __iomem *cpic_reg;
-
-static struct irq_domain *cpm_pic_host;
-
-static void cpm_mask_irq(struct irq_data *d)
-{
- unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
-
- clrbits32(&cpic_reg->cpic_cimr, (1 << cpm_vec));
-}
-
-static void cpm_unmask_irq(struct irq_data *d)
-{
- unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
-
- setbits32(&cpic_reg->cpic_cimr, (1 << cpm_vec));
-}
-
-static void cpm_end_irq(struct irq_data *d)
-{
- unsigned int cpm_vec = (unsigned int)irqd_to_hwirq(d);
-
- out_be32(&cpic_reg->cpic_cisr, (1 << cpm_vec));
-}
-
-static struct irq_chip cpm_pic = {
- .name = "CPM PIC",
- .irq_mask = cpm_mask_irq,
- .irq_unmask = cpm_unmask_irq,
- .irq_eoi = cpm_end_irq,
-};
-
-int cpm_get_irq(void)
-{
- int cpm_vec;
-
- /*
- * Get the vector by setting the ACK bit and then reading
- * the register.
- */
- out_be16(&cpic_reg->cpic_civr, 1);
- cpm_vec = in_be16(&cpic_reg->cpic_civr);
- cpm_vec >>= 11;
-
- return irq_linear_revmap(cpm_pic_host, cpm_vec);
-}
-
-static int cpm_pic_host_map(struct irq_domain *h, unsigned int virq,
- irq_hw_number_t hw)
-{
- pr_debug("cpm_pic_host_map(%d, 0x%lx)\n", virq, hw);
-
- irq_set_status_flags(virq, IRQ_LEVEL);
- irq_set_chip_and_handler(virq, &cpm_pic, handle_fasteoi_irq);
- return 0;
-}
-
-/*
- * The CPM can generate the error interrupt when there is a race condition
- * between generating and masking interrupts. All we have to do is ACK it
- * and return. This is a no-op function so we don't need any special
- * tests in the interrupt handler.
- */
-static irqreturn_t cpm_error_interrupt(int irq, void *dev)
-{
- return IRQ_HANDLED;
-}
-
-static const struct irq_domain_ops cpm_pic_host_ops = {
- .map = cpm_pic_host_map,
-};
-
-unsigned int __init cpm_pic_init(void)
-{
- struct device_node *np = NULL;
- struct resource res;
- unsigned int sirq = 0, hwirq, eirq;
- int ret;
-
- pr_debug("cpm_pic_init\n");
-
- np = of_find_compatible_node(NULL, NULL, "fsl,cpm1-pic");
- if (np == NULL)
- np = of_find_compatible_node(NULL, "cpm-pic", "CPM");
- if (np == NULL) {
- printk(KERN_ERR "CPM PIC init: can not find cpm-pic node\n");
- return sirq;
- }
-
- ret = of_address_to_resource(np, 0, &res);
- if (ret)
- goto end;
-
- cpic_reg = ioremap(res.start, resource_size(&res));
- if (cpic_reg == NULL)
- goto end;
-
- sirq = irq_of_parse_and_map(np, 0);
- if (!sirq)
- goto end;
-
- /* Initialize the CPM interrupt controller. */
- hwirq = (unsigned int)virq_to_hw(sirq);
- out_be32(&cpic_reg->cpic_cicr,
- (CICR_SCD_SCC4 | CICR_SCC_SCC3 | CICR_SCB_SCC2 | CICR_SCA_SCC1) |
- ((hwirq/2) << 13) | CICR_HP_MASK);
-
- out_be32(&cpic_reg->cpic_cimr, 0);
-
- cpm_pic_host = irq_domain_add_linear(np, 64, &cpm_pic_host_ops, NULL);
- if (cpm_pic_host == NULL) {
- printk(KERN_ERR "CPM2 PIC: failed to allocate irq host!\n");
- sirq = 0;
- goto end;
- }
-
- /* Install our own error handler. */
- np = of_find_compatible_node(NULL, NULL, "fsl,cpm1");
- if (np == NULL)
- np = of_find_node_by_type(NULL, "cpm");
- if (np == NULL) {
- printk(KERN_ERR "CPM PIC init: can not find cpm node\n");
- goto end;
- }
-
- eirq = irq_of_parse_and_map(np, 0);
- if (!eirq)
- goto end;
-
- if (request_irq(eirq, cpm_error_interrupt, IRQF_NO_THREAD, "error",
- NULL))
- printk(KERN_ERR "Could not allocate CPM error IRQ!");
-
- setbits32(&cpic_reg->cpic_cicr, CICR_IEN);
-
-end:
- of_node_put(np);
- return sirq;
-}
void __init cpm_reset(void)
{
projects / linux.git / commitdiff