123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright 2017 CS Systemes d'Information
- */
- #include <common.h>
- #include <env.h>
- #include <dm.h>
- #include <wdt.h>
- #include <mpc8xx.h>
- #include <asm/cpm_8xx.h>
- #include <asm/io.h>
- void hw_watchdog_reset(void)
- {
- immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
- out_be16(&immap->im_siu_conf.sc_swsr, 0x556c); /* write magic1 */
- out_be16(&immap->im_siu_conf.sc_swsr, 0xaa39); /* write magic2 */
- }
- static int mpc8xx_wdt_start(struct udevice *dev, u64 timeout, ulong flags)
- {
- immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
- u32 val = CONFIG_SYS_SYPCR;
- const char *mode = env_get("watchdog_mode");
- if (strcmp(mode, "off") == 0)
- val = val & ~(SYPCR_SWE | SYPCR_SWRI);
- else if (strcmp(mode, "nmi") == 0)
- val = (val & ~SYPCR_SWRI) | SYPCR_SWE;
- out_be32(&immap->im_siu_conf.sc_sypcr, val);
- if (!(in_be32(&immap->im_siu_conf.sc_sypcr) & SYPCR_SWE))
- return -EBUSY;
- return 0;
- }
- static int mpc8xx_wdt_stop(struct udevice *dev)
- {
- immap_t __iomem *immap = (immap_t __iomem *)CONFIG_SYS_IMMR;
- out_be32(&immap->im_siu_conf.sc_sypcr, CONFIG_SYS_SYPCR & ~SYPCR_SWE);
- if (in_be32(&immap->im_siu_conf.sc_sypcr) & SYPCR_SWE)
- return -EBUSY;
- return 0;
- }
- static int mpc8xx_wdt_reset(struct udevice *dev)
- {
- hw_watchdog_reset();
- return 0;
- }
- static const struct wdt_ops mpc8xx_wdt_ops = {
- .start = mpc8xx_wdt_start,
- .reset = mpc8xx_wdt_reset,
- .stop = mpc8xx_wdt_stop,
- };
- static const struct udevice_id mpc8xx_wdt_ids[] = {
- { .compatible = "fsl,pq1-wdt" },
- {}
- };
- U_BOOT_DRIVER(wdt_mpc8xx) = {
- .name = "wdt_mpc8xx",
- .id = UCLASS_WDT,
- .of_match = mpc8xx_wdt_ids,
- .ops = &mpc8xx_wdt_ops,
- };
|