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2024-05-11 297b60346df8beafee954a0fd7c2d64f33f3b9bc 
 kernel/drivers/net/wireless/rockchip_wlan/cywdhd/bcmdhd/pcie_core.c
....@@ -1,17 +1,18 @@
1
-/* SPDX-License-Identifier: GPL-2.0 */
21 /** @file pcie_core.c
32  *
43  * Contains PCIe related functions that are shared between different driver models (e.g. firmware
54  * builds, DHD builds, BMAC builds), in order to avoid code duplication.
65  *
7
- * Copyright (C) 1999-2019, Broadcom Corporation
8
- * 
6
+ * Portions of this code are copyright (c) 2022 Cypress Semiconductor Corporation
7
+ *
8
+ * Copyright (C) 1999-2017, Broadcom Corporation
9
+ *
910  *      Unless you and Broadcom execute a separate written software license
1011  * agreement governing use of this software, this software is licensed to you
1112  * under the terms of the GNU General Public License version 2 (the "GPL"),
1213  * available at http://www.broadcom.com/licenses/GPLv2.php, with the
1314  * following added to such license:
14
- * 
15
+ *
1516  *      As a special exception, the copyright holders of this software give you
1617  * permission to link this software with independent modules, and to copy and
1718  * distribute the resulting executable under terms of your choice, provided that
....@@ -19,7 +20,7 @@
1920  * the license of that module.  An independent module is a module which is not
2021  * derived from this software.  The special exception does not apply to any
2122  * modifications of the software.
22
- * 
23
+ *
2324  *      Notwithstanding the above, under no circumstances may you combine this
2425  * software in any way with any other Broadcom software provided under a license
2526  * other than the GPL, without Broadcom's express prior written consent.
....@@ -27,7 +28,7 @@
2728  *
2829  * <<Broadcom-WL-IPTag/Open:>>
2930  *
30
- * $Id: pcie_core.c 444841 2013-12-21 04:32:29Z $
31
+ * $Id: pcie_core.c 701962 2017-05-30 06:13:15Z $
3132  */
3233 
3334 #include <bcm_cfg.h>
....@@ -38,8 +39,13 @@
3839 #include <siutils.h>
3940 #include <hndsoc.h>
4041 #include <sbchipc.h>
41
-
42
+#include <pcicfg.h>
43
+#include <bcmdevs.h>
44
+#include <siutils_priv.h>
4245 #include "pcie_core.h"
46
+
47
+extern int dhdpcie_dongle_host_pre_wd_reset_sequence(si_t *sih, osl_t *osh);
48
+extern int dhdpcie_dongle_host_post_wd_reset_sequence(si_t *sih, osl_t *osh);
4349 
4450 /* local prototypes */
4551 
....@@ -49,7 +55,8 @@
4955 
5056 #ifdef BCMDRIVER
5157 
52
-void pcie_watchdog_reset(osl_t *osh, si_t *sih, sbpcieregs_t *sbpcieregs)
58
+/* wd_mask/wd_val is only for chipc_corerev >= 65 */
59
+void pcie_watchdog_reset(osl_t *osh, si_t *sih, uint32 wd_mask, uint32 wd_val)
5360 {
5461 	uint32 val, i, lsc;
5562 	uint16 cfg_offset[] = {PCIECFGREG_STATUS_CMD, PCIECFGREG_PM_CSR,
....@@ -58,39 +65,82 @@
5865 		PCIECFGREG_LINK_STATUS_CTRL2, PCIECFGREG_RBAR_CTRL,
5966 		PCIECFGREG_PML1_SUB_CTRL1, PCIECFGREG_REG_BAR2_CONFIG,
6067 		PCIECFGREG_REG_BAR3_CONFIG};
61
-	sbpcieregs_t *pcie = NULL;
68
+	sbpcieregs_t *pcieregs = NULL;
6269 	uint32 origidx = si_coreidx(sih);
70
+	int32 bcmerror = BCME_ERROR;
71
+
72
+#ifdef BCMQT
73
+	/* To avoid hang on FPGA, donot reset watchdog */
74
+	if (CCREV(sih->ccrev) < 65) {
75
+		si_setcoreidx(sih, origidx);
76
+		return;
77
+	}
78
+#endif // endif
79
+#ifdef BCMFPGA_HW
80
+		if (CCREV(sih->ccrev) < 67) {
81
+			/* To avoid hang on FPGA, donot reset watchdog */
82
+			si_setcoreidx(sih, origidx);
83
+			return;
84
+		}
85
+#endif // endif
6386 
6487 	/* Switch to PCIE2 core */
65
-	pcie = (sbpcieregs_t *)si_setcore(sih, PCIE2_CORE_ID, 0);
66
-	BCM_REFERENCE(pcie);
67
-	ASSERT(pcie != NULL);
88
+	pcieregs = (sbpcieregs_t *)si_setcore(sih, PCIE2_CORE_ID, 0);
89
+	BCM_REFERENCE(pcieregs);
90
+	ASSERT(pcieregs != NULL);
6891 
6992 	/* Disable/restore ASPM Control to protect the watchdog reset */
70
-	W_REG(osh, &sbpcieregs->configaddr, PCIECFGREG_LINK_STATUS_CTRL);
71
-	lsc = R_REG(osh, &sbpcieregs->configdata);
93
+	W_REG(osh, &pcieregs->configaddr, PCIECFGREG_LINK_STATUS_CTRL);
94
+	lsc = R_REG(osh, &pcieregs->configdata);
7295 	val = lsc & (~PCIE_ASPM_ENAB);
73
-	W_REG(osh, &sbpcieregs->configdata, val);
96
+	W_REG(osh, &pcieregs->configdata, val);
97
+
98
+	/*
99
+	 * CYW55560 - As part of watchdog reset, ARM gets reset and bootloader starts from fresh,
100
+	 * So, pre wd reset sequcnce defined to make sure that pre init for bootloader can be done
101
+	 */
102
+	if (sih->chip == CYW55560_CHIP_ID) {
103
+		if ((bcmerror = dhdpcie_dongle_host_pre_wd_reset_sequence(sih, osh))) {
104
+			SI_ERROR(("%s: error %d pre wd reset seq\n",  __FUNCTION__, bcmerror));
105
+			return;
106
+		}
107
+	}
74108 
75109 	si_corereg(sih, SI_CC_IDX, OFFSETOF(chipcregs_t, watchdog), ~0, 4);
76
-	OSL_DELAY(100000);
77110 
78
-	W_REG(osh, &sbpcieregs->configaddr, PCIECFGREG_LINK_STATUS_CTRL);
79
-	W_REG(osh, &sbpcieregs->configdata, lsc);
111
+#ifdef BCMQT
112
+	OSL_DELAY(10000000);
113
+#else
114
+	OSL_DELAY(100000);
115
+#endif // endif
116
+
117
+	/*
118
+	 * CYW55560 - Once watchdog reset initiated, bootloader takes much time to be ready,
119
+	 * [BL_READY bit set], to make sure that host should not access backplane till bootloader
120
+	 * is not ready, post wd reset sequence is performed.
121
+	 */
122
+	if (sih->chip == CYW55560_CHIP_ID) {
123
+		if ((bcmerror = dhdpcie_dongle_host_post_wd_reset_sequence(sih, osh))) {
124
+			SI_ERROR(("%s: error %d post wd reset seq.\n", __FUNCTION__, bcmerror));
125
+			return;
126
+		}
127
+	}
128
+
129
+	W_REG(osh, &pcieregs->configaddr, PCIECFGREG_LINK_STATUS_CTRL);
130
+	W_REG(osh, &pcieregs->configdata, lsc);
80131 
81132 	if (sih->buscorerev <= 13) {
82133 		/* Write configuration registers back to the shadow registers
83134 		 * cause shadow registers are cleared out after watchdog reset.
84135 		 */
85136 		for (i = 0; i < ARRAYSIZE(cfg_offset); i++) {
86
-			W_REG(osh, &sbpcieregs->configaddr, cfg_offset[i]);
87
-			val = R_REG(osh, &sbpcieregs->configdata);
88
-			W_REG(osh, &sbpcieregs->configdata, val);
137
+			W_REG(osh, &pcieregs->configaddr, cfg_offset[i]);
138
+			val = R_REG(osh, &pcieregs->configdata);
139
+			W_REG(osh, &pcieregs->configdata, val);
89140 		}
90141 	}
91142 	si_setcoreidx(sih, origidx);
92143 }
93
-
94144 
95145 /* CRWLPCIEGEN2-117 pcie_pipe_Iddq should be controlled
96146  * by the L12 state from MAC to save power by putting the
....@@ -113,4 +163,24 @@
113163 
114164 	si_setcoreidx(sih, origidx);
115165 }
166
+
167
+#define PCIE_PMCR_REFUP_MASK 0x3f0001e0
168
+#define PCIE_PMCR_REFEXT_MASK 0x400000
169
+#define PCIE_PMCR_REFUP_100US 0x38000080
170
+#define PCIE_PMCR_REFEXT_100US 0x400000
171
+
172
+/* Set PCIE TRefUp time to 100us */
173
+void pcie_set_trefup_time_100us(si_t *sih)
174
+{
175
+	si_corereg(sih, sih->buscoreidx,
176
+		OFFSETOF(sbpcieregs_t, configaddr), ~0, PCI_PMCR_REFUP);
177
+	si_corereg(sih, sih->buscoreidx,
178
+		OFFSETOF(sbpcieregs_t, configdata), PCIE_PMCR_REFUP_MASK, PCIE_PMCR_REFUP_100US);
179
+
180
+	si_corereg(sih, sih->buscoreidx,
181
+		OFFSETOF(sbpcieregs_t, configaddr), ~0, PCI_PMCR_REFUP_EXT);
182
+	si_corereg(sih, sih->buscoreidx,
183
+		OFFSETOF(sbpcieregs_t, configdata), PCIE_PMCR_REFEXT_MASK, PCIE_PMCR_REFEXT_100US);
184
+}
185
+
116186 #endif /* BCMDRIVER */