121fbb558Sryan_chen // SPDX-License-Identifier: GPL-2.0
221fbb558Sryan_chen /*
321fbb558Sryan_chen * Copyright (C) ASPEED Technology Inc.
421fbb558Sryan_chen */
521fbb558Sryan_chen
621fbb558Sryan_chen #include <common.h>
721fbb558Sryan_chen #include <dm.h>
821fbb558Sryan_chen #include <misc.h>
921fbb558Sryan_chen #include <reset.h>
1021fbb558Sryan_chen #include <reset-uclass.h>
1121fbb558Sryan_chen #include <wdt.h>
1221fbb558Sryan_chen #include <asm/io.h>
1321fbb558Sryan_chen #include <asm/arch/scu_ast2600.h>
1421fbb558Sryan_chen
1539283ea7Sryan_chen struct ast2600_reset_priv {
1621fbb558Sryan_chen /* WDT used to perform resets. */
1721fbb558Sryan_chen struct udevice *wdt;
1821fbb558Sryan_chen struct ast2600_scu *scu;
1921fbb558Sryan_chen };
2021fbb558Sryan_chen
ast2600_reset_deassert(struct reset_ctl * reset_ctl)2139283ea7Sryan_chen static int ast2600_reset_deassert(struct reset_ctl *reset_ctl)
2239283ea7Sryan_chen {
2339283ea7Sryan_chen struct ast2600_reset_priv *priv = dev_get_priv(reset_ctl->dev);
2439283ea7Sryan_chen struct ast2600_scu *scu = priv->scu;
2539283ea7Sryan_chen
26*43c77850Sryan_chen debug("ast2600_reset_assert reset_ctl->id %ld \n", reset_ctl->id);
2739283ea7Sryan_chen
2839283ea7Sryan_chen if(reset_ctl->id >= 32)
29*43c77850Sryan_chen writel(BIT(reset_ctl->id - 32), &scu->sysreset_clr_ctrl2);
3039283ea7Sryan_chen else
31*43c77850Sryan_chen writel(BIT(reset_ctl->id), &scu->sysreset_clr_ctrl1);
3239283ea7Sryan_chen
3339283ea7Sryan_chen return 0;
3439283ea7Sryan_chen }
3539283ea7Sryan_chen
ast2600_reset_assert(struct reset_ctl * reset_ctl)3621fbb558Sryan_chen static int ast2600_reset_assert(struct reset_ctl *reset_ctl)
3721fbb558Sryan_chen {
3839283ea7Sryan_chen struct ast2600_reset_priv *priv = dev_get_priv(reset_ctl->dev);
3939283ea7Sryan_chen struct ast2600_scu *scu = priv->scu;
4039283ea7Sryan_chen
41*43c77850Sryan_chen debug("ast2600_reset_assert reset_ctl->id %ld \n", reset_ctl->id);
4239283ea7Sryan_chen
4339283ea7Sryan_chen if(reset_ctl->id >= 32)
44*43c77850Sryan_chen writel(BIT(reset_ctl->id - 32), &scu->sysreset_ctrl2);
4539283ea7Sryan_chen else
46*43c77850Sryan_chen writel(BIT(reset_ctl->id), &scu->sysreset_ctrl1);
4739283ea7Sryan_chen
4839283ea7Sryan_chen return 0;
4921fbb558Sryan_chen }
5021fbb558Sryan_chen
ast2600_reset_request(struct reset_ctl * reset_ctl)5121fbb558Sryan_chen static int ast2600_reset_request(struct reset_ctl *reset_ctl)
5221fbb558Sryan_chen {
53*43c77850Sryan_chen debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
5421fbb558Sryan_chen reset_ctl->dev, reset_ctl->id);
5521fbb558Sryan_chen
5621fbb558Sryan_chen return 0;
5721fbb558Sryan_chen }
5821fbb558Sryan_chen
ast2600_reset_probe(struct udevice * dev)5921fbb558Sryan_chen static int ast2600_reset_probe(struct udevice *dev)
6021fbb558Sryan_chen {
6139283ea7Sryan_chen struct ast2600_reset_priv *priv = dev_get_priv(dev);
628f0f9cd3Sryan_chen struct udevice *clk_dev;
638f0f9cd3Sryan_chen int ret = 0;
6421fbb558Sryan_chen
658f0f9cd3Sryan_chen /* find SCU base address from clock device */
668f0f9cd3Sryan_chen ret = uclass_get_device_by_driver(UCLASS_CLK, DM_GET_DRIVER(aspeed_scu),
678f0f9cd3Sryan_chen &clk_dev);
688f0f9cd3Sryan_chen if (ret) {
698f0f9cd3Sryan_chen debug("clock device not found\n");
708f0f9cd3Sryan_chen return ret;
718f0f9cd3Sryan_chen }
728f0f9cd3Sryan_chen
738f0f9cd3Sryan_chen priv->scu = devfdt_get_addr_ptr(clk_dev);
748f0f9cd3Sryan_chen if (IS_ERR(priv->scu)) {
758f0f9cd3Sryan_chen debug("%s(): can't get SCU\n", __func__);
768f0f9cd3Sryan_chen return PTR_ERR(priv->scu);
778f0f9cd3Sryan_chen }
7821fbb558Sryan_chen
7921fbb558Sryan_chen return 0;
8021fbb558Sryan_chen }
8121fbb558Sryan_chen
ast2600_ofdata_to_platdata(struct udevice * dev)822fa13dd8Sryan_chen static int ast2600_ofdata_to_platdata(struct udevice *dev)
8321fbb558Sryan_chen {
842fa13dd8Sryan_chen // struct ast2600_reset_priv *priv = dev_get_priv(dev);
85*43c77850Sryan_chen // int ret;
86*43c77850Sryan_chen
872fa13dd8Sryan_chen #if 0
882fa13dd8Sryan_chen ret = uclass_get_device_by_phandle(UCLASS_WDT, dev, "aspeed,ast2600-wdt",
8921fbb558Sryan_chen &priv->wdt);
9021fbb558Sryan_chen if (ret) {
912fa13dd8Sryan_chen printf("%s: can't find WDT for reset controller", __func__);
9221fbb558Sryan_chen return ret;
9321fbb558Sryan_chen }
942fa13dd8Sryan_chen #endif
9521fbb558Sryan_chen
9621fbb558Sryan_chen return 0;
9721fbb558Sryan_chen }
9821fbb558Sryan_chen
9921fbb558Sryan_chen static const struct udevice_id aspeed_reset_ids[] = {
10021fbb558Sryan_chen { .compatible = "aspeed,ast2600-reset" },
10121fbb558Sryan_chen { }
10221fbb558Sryan_chen };
10321fbb558Sryan_chen
10421fbb558Sryan_chen struct reset_ops aspeed_reset_ops = {
10521fbb558Sryan_chen .rst_assert = ast2600_reset_assert,
10639283ea7Sryan_chen .rst_deassert = ast2600_reset_deassert,
10721fbb558Sryan_chen .request = ast2600_reset_request,
10821fbb558Sryan_chen };
10921fbb558Sryan_chen
11021fbb558Sryan_chen U_BOOT_DRIVER(aspeed_reset) = {
11121fbb558Sryan_chen .name = "aspeed_reset",
11221fbb558Sryan_chen .id = UCLASS_RESET,
11321fbb558Sryan_chen .of_match = aspeed_reset_ids,
11421fbb558Sryan_chen .probe = ast2600_reset_probe,
11521fbb558Sryan_chen .ops = &aspeed_reset_ops,
1162fa13dd8Sryan_chen .ofdata_to_platdata = ast2600_ofdata_to_platdata,
11739283ea7Sryan_chen .priv_auto_alloc_size = sizeof(struct ast2600_reset_priv),
11821fbb558Sryan_chen };
119