1 /*
2 * Copyright (c) 2021, MediaTek Inc. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6 #include <arch_helpers.h>
7 #include <common/debug.h>
8 #include <lib/mmio.h>
9 #include <mtk_sip_svc.h>
10 #include <plat_dfd.h>
11
12 static bool dfd_enabled;
13 static uint64_t dfd_base_addr;
14 static uint64_t dfd_chain_length;
15 static uint64_t dfd_cache_dump;
16
dfd_setup(uint64_t base_addr,uint64_t chain_length,uint64_t cache_dump)17 static void dfd_setup(uint64_t base_addr, uint64_t chain_length,
18 uint64_t cache_dump)
19 {
20 mmio_write_32(MTK_WDT_LATCH_CTL2, MTK_WDT_LATCH_CTL2_VAL);
21 mmio_write_32(MTK_WDT_INTERVAL, MTK_WDT_INTERVAL_VAL);
22 mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_VAL);
23 mmio_write_32(MTK_DRM_LATCH_CTL1, MTK_DRM_LATCH_CTL1_VAL);
24
25 /* Bit[2] = 0 (default=1), disable dfd apb bus protect_en */
26 mmio_clrbits_32(DFD_O_INTRF_MCU_PWR_CTL_MASK, 0x1 << 2);
27
28 /* Bit[0] : enable?mcusys_vproc?external_off?dfd?trigger -> 1 */
29 mmio_setbits_32(DFD_V50_GROUP_0_63_DIFF, 0x1);
30
31 /* bit[0]: rg_rw_dfd_internal_dump_en -> 1 */
32 /* bit[2]: rg_rw_dfd_clock_stop_en -> 1 */
33 sync_writel(DFD_INTERNAL_CTL, 0x5);
34
35 /* bit[13]: xreset_b_update_disable */
36 mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 13);
37
38 /*
39 * bit[10:3]: DFD trigger selection mask
40 * bit[3]: rg_rw_dfd_trigger_sel[0] = 1(enable wdt trigger)
41 * bit[4]: rg_rw_dfd_trigger_sel[1] = 1(enable HW trigger)
42 * bit[5]: rg_rw_dfd_trigger_sel[2] = 1(enable SW trigger)
43 * bit[6]: rg_rw_dfd_trigger_sel[3] = 1(enable SW non-security trigger)
44 * bit[7]: rg_rw_dfd_trigger_sel[4] = 1(enable timer trigger)
45 */
46 mmio_setbits_32(DFD_INTERNAL_CTL, 0x1F << 3);
47
48 /*
49 * bit[9] : rg_rw_dfd_trigger_sel[6] = 1(cpu_eb_sw_dfd_trigger)
50 * bit[10] : rg_rw_dfd_trigger_sel[7] = 1(cpu_eb_wdt_dfd_trigger)
51 */
52 mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 9);
53
54 /* bit[20:19]: rg_dfd_armpll_div_mux_sel switch to PLL2 for DFD */
55 mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 19);
56
57 /*
58 * bit[0]: rg_rw_dfd_auto_power_on = 1
59 * bit[2:1]: rg_rw_dfd_auto_power_on_dely = 1(10us)
60 * bit[4:2]: rg_rw_dfd_power_on_wait_time = 1(20us)
61 */
62 mmio_write_32(DFD_INTERNAL_PWR_ON, 0xB);
63
64 /* longest scan chain length */
65 mmio_write_32(DFD_CHAIN_LENGTH0, chain_length);
66
67 /* bit[1:0]: rg_rw_dfd_shift_clock_ratio */
68 mmio_write_32(DFD_INTERNAL_SHIFT_CLK_RATIO, 0x0);
69
70 /* rg_dfd_test_so_over_64 */
71 mmio_write_32(DFD_INTERNAL_TEST_SO_OVER_64, 0x1);
72
73 /* DFD3.0 */
74 mmio_write_32(DFD_TEST_SI_0, 0x0);
75 mmio_write_32(DFD_TEST_SI_1, 0x0);
76 mmio_write_32(DFD_TEST_SI_2, 0x0);
77 mmio_write_32(DFD_TEST_SI_3, 0x0);
78
79 /* for iLDO feature */
80 sync_writel(DFD_POWER_CTL, 0xF9);
81
82 /* read offset */
83 sync_writel(DFD_READ_ADDR, DFD_READ_ADDR_VAL);
84
85 /* for DFD-3.0 setup */
86 sync_writel(DFD_V30_CTL, 0xD);
87
88 /* set base address */
89 mmio_write_32(DFD_O_SET_BASEADDR_REG, base_addr >> 24);
90 mmio_write_32(DFD_O_REG_0, 0);
91
92 /* setup global variables for suspend and resume */
93 dfd_enabled = true;
94 dfd_base_addr = base_addr;
95 dfd_chain_length = chain_length;
96 dfd_cache_dump = cache_dump;
97
98 if ((cache_dump & DFD_CACHE_DUMP_ENABLE) != 0UL) {
99 mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_CACHE_VAL);
100 sync_writel(DFD_V35_ENABLE, 0x1);
101 sync_writel(DFD_V35_TAP_NUMBER, 0xB);
102 sync_writel(DFD_V35_TAP_EN, DFD_V35_TAP_EN_VAL);
103 sync_writel(DFD_V35_SEQ0_0, DFD_V35_SEQ0_0_VAL);
104
105 /* Cache dump only mode */
106 sync_writel(DFD_V35_CTL, 0x1);
107 mmio_write_32(DFD_INTERNAL_NUM_OF_TEST_SO_GROUP, 0xF);
108 mmio_write_32(DFD_CHAIN_LENGTH0, DFD_CHAIN_LENGTH_VAL);
109 mmio_write_32(DFD_CHAIN_LENGTH1, DFD_CHAIN_LENGTH_VAL);
110 mmio_write_32(DFD_CHAIN_LENGTH2, DFD_CHAIN_LENGTH_VAL);
111 mmio_write_32(DFD_CHAIN_LENGTH3, DFD_CHAIN_LENGTH_VAL);
112
113 if ((cache_dump & DFD_PARITY_ERR_TRIGGER) != 0UL) {
114 sync_writel(DFD_HW_TRIGGER_MASK, 0xC);
115 mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 4);
116 }
117 }
118 dsbsy();
119 }
120
dfd_resume(void)121 void dfd_resume(void)
122 {
123 if (dfd_enabled == true) {
124 dfd_setup(dfd_base_addr, dfd_chain_length, dfd_cache_dump);
125 }
126 }
127
dfd_smc_dispatcher(uint64_t arg0,uint64_t arg1,uint64_t arg2,uint64_t arg3)128 uint64_t dfd_smc_dispatcher(uint64_t arg0, uint64_t arg1,
129 uint64_t arg2, uint64_t arg3)
130 {
131 uint64_t ret = 0L;
132
133 switch (arg0) {
134 case PLAT_MTK_DFD_SETUP_MAGIC:
135 INFO("[%s] DFD setup call from kernel\n", __func__);
136 dfd_setup(arg1, arg2, arg3);
137 break;
138 case PLAT_MTK_DFD_READ_MAGIC:
139 /* only allow to access DFD register base + 0x200 */
140 if (arg1 <= 0x200) {
141 ret = mmio_read_32(MISC1_CFG_BASE + arg1);
142 }
143 break;
144 case PLAT_MTK_DFD_WRITE_MAGIC:
145 /* only allow to access DFD register base + 0x200 */
146 if (arg1 <= 0x200) {
147 sync_writel(MISC1_CFG_BASE + arg1, arg2);
148 }
149 break;
150 default:
151 ret = MTK_SIP_E_INVALID_PARAM;
152 break;
153 }
154
155 return ret;
156 }
157