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Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +02001/*
Biju Das61de64b2020-12-13 20:13:42 +00002 * Copyright (c) 2015-2020, Renesas Electronics Corporation. All rights reserved.
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +02003 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7#include <arch_helpers.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +00008#include <common/debug.h>
9#include <drivers/arm/gicv2.h>
10#include <lib/mmio.h>
11
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +020012#include "rcar_def.h"
13
14extern void gicd_set_icenabler(uintptr_t base, unsigned int id);
15
16#define RST_BASE (0xE6160000U)
17#define RST_WDTRSTCR (RST_BASE + 0x0054U)
18#define SWDT_BASE (0xE6030000U)
19#define SWDT_WTCNT (SWDT_BASE + 0x0000U)
20#define SWDT_WTCSRA (SWDT_BASE + 0x0004U)
21#define SWDT_WTCSRB (SWDT_BASE + 0x0008U)
22#define SWDT_GICD_BASE (0xF1010000U)
23#define SWDT_GICC_BASE (0xF1020000U)
24#define SWDT_GICD_CTLR (SWDT_GICD_BASE + 0x0000U)
25#define SWDT_GICD_IGROUPR (SWDT_GICD_BASE + 0x0080U)
26#define SWDT_GICD_ISPRIORITYR (SWDT_GICD_BASE + 0x0400U)
27#define SWDT_GICC_CTLR (SWDT_GICC_BASE + 0x0000U)
28#define SWDT_GICC_PMR (SWDT_GICC_BASE + 0x0004U)
29#define SWDT_GICD_ITARGETSR (SWDT_GICD_BASE + 0x0800U)
30#define IGROUPR_NUM (16U)
31#define ISPRIORITY_NUM (128U)
32#define ITARGET_MASK (0x03U)
33
34#define WDTRSTCR_UPPER_BYTE (0xA55A0000U)
35#define WTCSRA_UPPER_BYTE (0xA5A5A500U)
36#define WTCSRB_UPPER_BYTE (0xA5A5A500U)
37#define WTCNT_UPPER_BYTE (0x5A5A0000U)
38#define WTCNT_RESET_VALUE (0xF488U)
39#define WTCSRA_BIT_CKS (0x0007U)
40#define WTCSRB_BIT_CKS (0x003FU)
41#define SWDT_RSTMSK (1U << 1U)
42#define WTCSRA_WOVFE (1U << 3U)
43#define WTCSRA_WRFLG (1U << 5U)
44#define SWDT_ENABLE (1U << 7U)
45
46#define WDTRSTCR_MASK_ALL (0x0000FFFFU)
47#define WTCSRA_MASK_ALL (0x000000FFU)
48#define WTCNT_INIT_DATA (WTCNT_UPPER_BYTE + WTCNT_RESET_VALUE)
49#define WTCSRA_INIT_DATA (WTCSRA_UPPER_BYTE + 0x0FU)
50#define WTCSRB_INIT_DATA (WTCSRB_UPPER_BYTE + 0x21U)
51
Marek Vasut1ff889d2019-01-05 14:18:10 +010052#if RCAR_LSI == RCAR_D3
53#define WTCNT_COUNT_8p13k (0x10000U - 40760U)
54#else
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +020055#define WTCNT_COUNT_8p13k (0x10000U - 40687U)
Marek Vasut1ff889d2019-01-05 14:18:10 +010056#endif
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +020057#define WTCNT_COUNT_8p13k_H3VER10 (0x10000U - 20343U)
58#define WTCNT_COUNT_8p22k (0x10000U - 41115U)
59#define WTCNT_COUNT_7p81k (0x10000U - 39062U)
60#define WTCSRA_CKS_DIV16 (0x00000002U)
61
62static void swdt_disable(void)
63{
64 uint32_t rmsk;
65
66 rmsk = mmio_read_32(RST_WDTRSTCR) & WDTRSTCR_MASK_ALL;
67 rmsk |= SWDT_RSTMSK;
68 mmio_write_32(RST_WDTRSTCR, WDTRSTCR_UPPER_BYTE | rmsk);
69
70 mmio_write_32(SWDT_WTCNT, WTCNT_INIT_DATA);
71 mmio_write_32(SWDT_WTCSRA, WTCSRA_INIT_DATA);
72 mmio_write_32(SWDT_WTCSRB, WTCSRB_INIT_DATA);
73
74 /* Set the interrupt clear enable register */
75 gicd_set_icenabler(RCAR_GICD_BASE, ARM_IRQ_SEC_WDT);
76}
77
78void rcar_swdt_init(void)
79{
ldts0a596b42018-11-06 10:17:12 +010080 uint32_t rmsk, sr;
Lad Prabhakard66b3842021-03-19 11:22:18 +000081#if (RCAR_LSI != RCAR_E3) && (RCAR_LSI != RZ_G2E)
ldts0a596b42018-11-06 10:17:12 +010082 uint32_t reg, val, product_cut, chk_data;
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +020083
84 reg = mmio_read_32(RCAR_PRR);
Marek Vasut9cadc782019-08-06 19:13:22 +020085 product_cut = reg & (PRR_PRODUCT_MASK | PRR_CUT_MASK);
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +020086
87 reg = mmio_read_32(RCAR_MODEMR);
88 chk_data = reg & CHECK_MD13_MD14;
89#endif
90 /* stop watchdog */
91 if (mmio_read_32(SWDT_WTCSRA) & SWDT_ENABLE)
92 mmio_write_32(SWDT_WTCSRA, WTCSRA_UPPER_BYTE);
93
94 mmio_write_32(SWDT_WTCSRA, WTCSRA_UPPER_BYTE |
95 WTCSRA_WOVFE | WTCSRA_CKS_DIV16);
96
Lad Prabhakard66b3842021-03-19 11:22:18 +000097#if (RCAR_LSI == RCAR_E3) || (RCAR_LSI == RZ_G2E)
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +020098 mmio_write_32(SWDT_WTCNT, WTCNT_UPPER_BYTE | WTCNT_COUNT_7p81k);
99#else
100 val = WTCNT_UPPER_BYTE;
101
102 switch (chk_data) {
103 case MD14_MD13_TYPE_0:
104 case MD14_MD13_TYPE_2:
105 val |= WTCNT_COUNT_8p13k;
106 break;
107 case MD14_MD13_TYPE_1:
108 val |= WTCNT_COUNT_8p22k;
109 break;
110 case MD14_MD13_TYPE_3:
Marek Vasut9cadc782019-08-06 19:13:22 +0200111 val |= product_cut == (PRR_PRODUCT_H3 | PRR_PRODUCT_10) ?
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +0200112 WTCNT_COUNT_8p13k_H3VER10 : WTCNT_COUNT_8p13k;
113 break;
114 default:
115 ERROR("MODEMR ERROR value = %x\n", chk_data);
116 panic();
117 break;
118 }
119
120 mmio_write_32(SWDT_WTCNT, val);
121#endif
122 rmsk = mmio_read_32(RST_WDTRSTCR) & WDTRSTCR_MASK_ALL;
123 rmsk |= SWDT_RSTMSK | WDTRSTCR_UPPER_BYTE;
124 mmio_write_32(RST_WDTRSTCR, rmsk);
125
126 while ((mmio_read_8(SWDT_WTCSRA) & WTCSRA_WRFLG) != 0U)
127 ;
128
129 /* Start the System WatchDog Timer */
130 sr = mmio_read_32(SWDT_WTCSRA) & WTCSRA_MASK_ALL;
131 mmio_write_32(SWDT_WTCSRA, (WTCSRA_UPPER_BYTE | sr | SWDT_ENABLE));
132}
133
134void rcar_swdt_release(void)
135{
136 uintptr_t itarget = SWDT_GICD_ITARGETSR +
137 (ARM_IRQ_SEC_WDT & ~ITARGET_MASK);
138 uint32_t i;
139
Marek Vasute6fe8172018-12-27 20:28:45 +0100140 /* Disable FIQ interrupt */
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +0200141 write_daifset(DAIF_FIQ_BIT);
Marek Vasute6fe8172018-12-27 20:28:45 +0100142 /* FIQ interrupts are not taken to EL3 */
143 write_scr_el3(read_scr_el3() & ~SCR_FIQ_BIT);
144
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +0200145 swdt_disable();
146 gicv2_cpuif_disable();
147
148 for (i = 0; i < IGROUPR_NUM; i++)
149 mmio_write_32(SWDT_GICD_IGROUPR + i * 4, 0U);
150
151 for (i = 0; i < ISPRIORITY_NUM; i++)
152 mmio_write_32(SWDT_GICD_ISPRIORITYR + i * 4, 0U);
153
154 mmio_write_32(itarget, 0U);
155 mmio_write_32(SWDT_GICD_CTLR, 0U);
156 mmio_write_32(SWDT_GICC_CTLR, 0U);
157 mmio_write_32(SWDT_GICC_PMR, 0U);
158}
159
160void rcar_swdt_exec(uint64_t p)
161{
162 gicv2_end_of_interrupt(ARM_IRQ_SEC_WDT);
163 rcar_swdt_release();
164 ERROR("\n");
Biju Das61de64b2020-12-13 20:13:42 +0000165 ERROR("System WDT overflow, occurred address is %p\n", (void *)p);
Jorge Ramirez-Ortiz7c21e1c2018-09-23 09:42:08 +0200166 panic();
167}