123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384 |
- /*
- * SDK7786 FPGA NMI Support.
- *
- * Copyright (C) 2010 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <mach/fpga.h>
- enum {
- NMI_MODE_MANUAL,
- NMI_MODE_AUX,
- NMI_MODE_MASKED,
- NMI_MODE_ANY,
- NMI_MODE_UNKNOWN,
- };
- /*
- * Default to the manual NMI switch.
- */
- static unsigned int __initdata nmi_mode = NMI_MODE_ANY;
- static int __init nmi_mode_setup(char *str)
- {
- if (!str)
- return 0;
- if (strcmp(str, "manual") == 0)
- nmi_mode = NMI_MODE_MANUAL;
- else if (strcmp(str, "aux") == 0)
- nmi_mode = NMI_MODE_AUX;
- else if (strcmp(str, "masked") == 0)
- nmi_mode = NMI_MODE_MASKED;
- else if (strcmp(str, "any") == 0)
- nmi_mode = NMI_MODE_ANY;
- else {
- nmi_mode = NMI_MODE_UNKNOWN;
- pr_warning("Unknown NMI mode %s\n", str);
- }
- printk("Set NMI mode to %d\n", nmi_mode);
- return 0;
- }
- early_param("nmi_mode", nmi_mode_setup);
- void __init sdk7786_nmi_init(void)
- {
- unsigned int source, mask, tmp;
- switch (nmi_mode) {
- case NMI_MODE_MANUAL:
- source = NMISR_MAN_NMI;
- mask = NMIMR_MAN_NMIM;
- break;
- case NMI_MODE_AUX:
- source = NMISR_AUX_NMI;
- mask = NMIMR_AUX_NMIM;
- break;
- case NMI_MODE_ANY:
- source = NMISR_MAN_NMI | NMISR_AUX_NMI;
- mask = NMIMR_MAN_NMIM | NMIMR_AUX_NMIM;
- break;
- case NMI_MODE_MASKED:
- case NMI_MODE_UNKNOWN:
- default:
- source = mask = 0;
- break;
- }
- /* Set the NMI source */
- tmp = fpga_read_reg(NMISR);
- tmp &= ~NMISR_MASK;
- tmp |= source;
- fpga_write_reg(tmp, NMISR);
- /* And the IRQ masking */
- fpga_write_reg(NMIMR_MASK ^ mask, NMIMR);
- }
|