diff options
Diffstat (limited to 'drivers/rtc/rtc-ls1x.c')
| -rw-r--r-- | drivers/rtc/rtc-ls1x.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c deleted file mode 100644 index 5af26dc5c2a3..000000000000 --- a/drivers/rtc/rtc-ls1x.c +++ /dev/null @@ -1,192 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (c) 2011 Zhao Zhang <zhzhl555@gmail.com> - * - * Derived from driver/rtc/rtc-au1xxx.c - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/rtc.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/types.h> -#include <linux/io.h> -#include <loongson1.h> - -#define LS1X_RTC_REG_OFFSET (LS1X_RTC_BASE + 0x20) -#define LS1X_RTC_REGS(x) \ - ((void __iomem *)KSEG1ADDR(LS1X_RTC_REG_OFFSET + (x))) - -/*RTC programmable counters 0 and 1*/ -#define SYS_COUNTER_CNTRL (LS1X_RTC_REGS(0x20)) -#define SYS_CNTRL_ERS (1 << 23) -#define SYS_CNTRL_RTS (1 << 20) -#define SYS_CNTRL_RM2 (1 << 19) -#define SYS_CNTRL_RM1 (1 << 18) -#define SYS_CNTRL_RM0 (1 << 17) -#define SYS_CNTRL_RS (1 << 16) -#define SYS_CNTRL_BP (1 << 14) -#define SYS_CNTRL_REN (1 << 13) -#define SYS_CNTRL_BRT (1 << 12) -#define SYS_CNTRL_TEN (1 << 11) -#define SYS_CNTRL_BTT (1 << 10) -#define SYS_CNTRL_E0 (1 << 8) -#define SYS_CNTRL_ETS (1 << 7) -#define SYS_CNTRL_32S (1 << 5) -#define SYS_CNTRL_TTS (1 << 4) -#define SYS_CNTRL_TM2 (1 << 3) -#define SYS_CNTRL_TM1 (1 << 2) -#define SYS_CNTRL_TM0 (1 << 1) -#define SYS_CNTRL_TS (1 << 0) - -/* Programmable Counter 0 Registers */ -#define SYS_TOYTRIM (LS1X_RTC_REGS(0)) -#define SYS_TOYWRITE0 (LS1X_RTC_REGS(4)) -#define SYS_TOYWRITE1 (LS1X_RTC_REGS(8)) -#define SYS_TOYREAD0 (LS1X_RTC_REGS(0xC)) -#define SYS_TOYREAD1 (LS1X_RTC_REGS(0x10)) -#define SYS_TOYMATCH0 (LS1X_RTC_REGS(0x14)) -#define SYS_TOYMATCH1 (LS1X_RTC_REGS(0x18)) -#define SYS_TOYMATCH2 (LS1X_RTC_REGS(0x1C)) - -/* Programmable Counter 1 Registers */ -#define SYS_RTCTRIM (LS1X_RTC_REGS(0x40)) -#define SYS_RTCWRITE0 (LS1X_RTC_REGS(0x44)) -#define SYS_RTCREAD0 (LS1X_RTC_REGS(0x48)) -#define SYS_RTCMATCH0 (LS1X_RTC_REGS(0x4C)) -#define SYS_RTCMATCH1 (LS1X_RTC_REGS(0x50)) -#define SYS_RTCMATCH2 (LS1X_RTC_REGS(0x54)) - -#define LS1X_SEC_OFFSET (4) -#define LS1X_MIN_OFFSET (10) -#define LS1X_HOUR_OFFSET (16) -#define LS1X_DAY_OFFSET (21) -#define LS1X_MONTH_OFFSET (26) - - -#define LS1X_SEC_MASK (0x3f) -#define LS1X_MIN_MASK (0x3f) -#define LS1X_HOUR_MASK (0x1f) -#define LS1X_DAY_MASK (0x1f) -#define LS1X_MONTH_MASK (0x3f) -#define LS1X_YEAR_MASK (0xffffffff) - -#define ls1x_get_sec(t) (((t) >> LS1X_SEC_OFFSET) & LS1X_SEC_MASK) -#define ls1x_get_min(t) (((t) >> LS1X_MIN_OFFSET) & LS1X_MIN_MASK) -#define ls1x_get_hour(t) (((t) >> LS1X_HOUR_OFFSET) & LS1X_HOUR_MASK) -#define ls1x_get_day(t) (((t) >> LS1X_DAY_OFFSET) & LS1X_DAY_MASK) -#define ls1x_get_month(t) (((t) >> LS1X_MONTH_OFFSET) & LS1X_MONTH_MASK) - -#define RTC_CNTR_OK (SYS_CNTRL_E0 | SYS_CNTRL_32S) - -static int ls1x_rtc_read_time(struct device *dev, struct rtc_time *rtm) -{ - unsigned long v; - time64_t t; - - v = readl(SYS_TOYREAD0); - t = readl(SYS_TOYREAD1); - - memset(rtm, 0, sizeof(struct rtc_time)); - t = mktime64((t & LS1X_YEAR_MASK), ls1x_get_month(v), - ls1x_get_day(v), ls1x_get_hour(v), - ls1x_get_min(v), ls1x_get_sec(v)); - rtc_time64_to_tm(t, rtm); - - return 0; -} - -static int ls1x_rtc_set_time(struct device *dev, struct rtc_time *rtm) -{ - unsigned long v, t, c; - int ret = -ETIMEDOUT; - - v = ((rtm->tm_mon + 1) << LS1X_MONTH_OFFSET) - | (rtm->tm_mday << LS1X_DAY_OFFSET) - | (rtm->tm_hour << LS1X_HOUR_OFFSET) - | (rtm->tm_min << LS1X_MIN_OFFSET) - | (rtm->tm_sec << LS1X_SEC_OFFSET); - - writel(v, SYS_TOYWRITE0); - c = 0x10000; - /* add timeout check counter, for more safe */ - while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c) - usleep_range(1000, 3000); - - if (!c) { - dev_err(dev, "set time timeout!\n"); - goto err; - } - - t = rtm->tm_year + 1900; - writel(t, SYS_TOYWRITE1); - c = 0x10000; - while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TS) && --c) - usleep_range(1000, 3000); - - if (!c) { - dev_err(dev, "set time timeout!\n"); - goto err; - } - return 0; -err: - return ret; -} - -static const struct rtc_class_ops ls1x_rtc_ops = { - .read_time = ls1x_rtc_read_time, - .set_time = ls1x_rtc_set_time, -}; - -static int ls1x_rtc_probe(struct platform_device *pdev) -{ - struct rtc_device *rtcdev; - unsigned long v; - - v = readl(SYS_COUNTER_CNTRL); - if (!(v & RTC_CNTR_OK)) { - dev_err(&pdev->dev, "rtc counters not working\n"); - return -ENODEV; - } - - /* set to 1 HZ if needed */ - if (readl(SYS_TOYTRIM) != 32767) { - v = 0x100000; - while ((readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) && --v) - usleep_range(1000, 3000); - - if (!v) { - dev_err(&pdev->dev, "time out\n"); - return -ETIMEDOUT; - } - writel(32767, SYS_TOYTRIM); - } - /* this loop coundn't be endless */ - while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS) - usleep_range(1000, 3000); - - rtcdev = devm_rtc_allocate_device(&pdev->dev); - if (IS_ERR(rtcdev)) - return PTR_ERR(rtcdev); - - platform_set_drvdata(pdev, rtcdev); - rtcdev->ops = &ls1x_rtc_ops; - rtcdev->range_min = RTC_TIMESTAMP_BEGIN_1900; - rtcdev->range_max = RTC_TIMESTAMP_END_2099; - - return devm_rtc_register_device(rtcdev); -} - -static struct platform_driver ls1x_rtc_driver = { - .driver = { - .name = "ls1x-rtc", - }, - .probe = ls1x_rtc_probe, -}; - -module_platform_driver(ls1x_rtc_driver); - -MODULE_AUTHOR("zhao zhang <zhzhl555@gmail.com>"); -MODULE_LICENSE("GPL"); |