1802d0beecafe (Thomas Gleixner 2019-05-27 08:55:21 +0200 1) // SPDX-License-Identifier: GPL-2.0-only
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 2) /*
856c7ccb9ce7a (Doug Berger 2017-03-29 17:29:09 -0700 3) * Copyright (C) 2014-2017 Broadcom
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 4) */
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 5)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 6) #include <linux/init.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 7) #include <linux/types.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 8) #include <linux/module.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 9) #include <linux/platform_device.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 10) #include <linux/interrupt.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 11) #include <linux/sysfs.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 12) #include <linux/io.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 13) #include <linux/string.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 14) #include <linux/device.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 15) #include <linux/list.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 16) #include <linux/of.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 17) #include <linux/bitops.h>
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 18) #include <linux/pm.h>
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 19) #include <linux/kernel.h>
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 20) #include <linux/kdebug.h>
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 21) #include <linux/notifier.h>
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 22)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 23) #ifdef CONFIG_MIPS
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 24) #include <asm/traps.h>
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 25) #endif
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 26)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 27) #define ARB_ERR_CAP_CLEAR (1 << 0)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 28) #define ARB_ERR_CAP_STATUS_TIMEOUT (1 << 12)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 29) #define ARB_ERR_CAP_STATUS_TEA (1 << 11)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 30) #define ARB_ERR_CAP_STATUS_WRITE (1 << 1)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 31) #define ARB_ERR_CAP_STATUS_VALID (1 << 0)
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 32)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 33) #define ARB_BP_CAP_CLEAR (1 << 0)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 34) #define ARB_BP_CAP_STATUS_PROT_SHIFT 14
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 35) #define ARB_BP_CAP_STATUS_TYPE (1 << 13)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 36) #define ARB_BP_CAP_STATUS_RSP_SHIFT 10
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 37) #define ARB_BP_CAP_STATUS_MASK GENMASK(1, 0)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 38) #define ARB_BP_CAP_STATUS_BS_SHIFT 2
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 39) #define ARB_BP_CAP_STATUS_WRITE (1 << 1)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 40) #define ARB_BP_CAP_STATUS_VALID (1 << 0)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 41)
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 42) enum {
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 43) ARB_TIMER,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 44) ARB_BP_CAP_CLR,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 45) ARB_BP_CAP_HI_ADDR,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 46) ARB_BP_CAP_ADDR,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 47) ARB_BP_CAP_STATUS,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 48) ARB_BP_CAP_MASTER,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 49) ARB_ERR_CAP_CLR,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 50) ARB_ERR_CAP_HI_ADDR,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 51) ARB_ERR_CAP_ADDR,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 52) ARB_ERR_CAP_STATUS,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 53) ARB_ERR_CAP_MASTER,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 54) };
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 55)
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 56) static const int gisb_offsets_bcm7038[] = {
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 57) [ARB_TIMER] = 0x00c,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 58) [ARB_BP_CAP_CLR] = 0x014,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 59) [ARB_BP_CAP_HI_ADDR] = -1,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 60) [ARB_BP_CAP_ADDR] = 0x0b8,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 61) [ARB_BP_CAP_STATUS] = 0x0c0,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 62) [ARB_BP_CAP_MASTER] = -1,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 63) [ARB_ERR_CAP_CLR] = 0x0c4,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 64) [ARB_ERR_CAP_HI_ADDR] = -1,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 65) [ARB_ERR_CAP_ADDR] = 0x0c8,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 66) [ARB_ERR_CAP_STATUS] = 0x0d0,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 67) [ARB_ERR_CAP_MASTER] = -1,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 68) };
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 69)
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 70) static const int gisb_offsets_bcm7278[] = {
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 71) [ARB_TIMER] = 0x008,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 72) [ARB_BP_CAP_CLR] = 0x01c,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 73) [ARB_BP_CAP_HI_ADDR] = -1,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 74) [ARB_BP_CAP_ADDR] = 0x220,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 75) [ARB_BP_CAP_STATUS] = 0x230,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 76) [ARB_BP_CAP_MASTER] = 0x234,
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 77) [ARB_ERR_CAP_CLR] = 0x7f8,
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 78) [ARB_ERR_CAP_HI_ADDR] = -1,
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 79) [ARB_ERR_CAP_ADDR] = 0x7e0,
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 80) [ARB_ERR_CAP_STATUS] = 0x7f0,
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 81) [ARB_ERR_CAP_MASTER] = 0x7f4,
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 82) };
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 83)
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 84) static const int gisb_offsets_bcm7400[] = {
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 85) [ARB_TIMER] = 0x00c,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 86) [ARB_BP_CAP_CLR] = 0x014,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 87) [ARB_BP_CAP_HI_ADDR] = -1,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 88) [ARB_BP_CAP_ADDR] = 0x0b8,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 89) [ARB_BP_CAP_STATUS] = 0x0c0,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 90) [ARB_BP_CAP_MASTER] = 0x0c4,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 91) [ARB_ERR_CAP_CLR] = 0x0c8,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 92) [ARB_ERR_CAP_HI_ADDR] = -1,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 93) [ARB_ERR_CAP_ADDR] = 0x0cc,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 94) [ARB_ERR_CAP_STATUS] = 0x0d4,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 95) [ARB_ERR_CAP_MASTER] = 0x0d8,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 96) };
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 97)
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 98) static const int gisb_offsets_bcm7435[] = {
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 99) [ARB_TIMER] = 0x00c,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 100) [ARB_BP_CAP_CLR] = 0x014,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 101) [ARB_BP_CAP_HI_ADDR] = -1,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 102) [ARB_BP_CAP_ADDR] = 0x158,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 103) [ARB_BP_CAP_STATUS] = 0x160,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 104) [ARB_BP_CAP_MASTER] = 0x164,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 105) [ARB_ERR_CAP_CLR] = 0x168,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 106) [ARB_ERR_CAP_HI_ADDR] = -1,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 107) [ARB_ERR_CAP_ADDR] = 0x16c,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 108) [ARB_ERR_CAP_STATUS] = 0x174,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 109) [ARB_ERR_CAP_MASTER] = 0x178,
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 110) };
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 111)
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 112) static const int gisb_offsets_bcm7445[] = {
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 113) [ARB_TIMER] = 0x008,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 114) [ARB_BP_CAP_CLR] = 0x010,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 115) [ARB_BP_CAP_HI_ADDR] = -1,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 116) [ARB_BP_CAP_ADDR] = 0x1d8,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 117) [ARB_BP_CAP_STATUS] = 0x1e0,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 118) [ARB_BP_CAP_MASTER] = 0x1e4,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 119) [ARB_ERR_CAP_CLR] = 0x7e4,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 120) [ARB_ERR_CAP_HI_ADDR] = 0x7e8,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 121) [ARB_ERR_CAP_ADDR] = 0x7ec,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 122) [ARB_ERR_CAP_STATUS] = 0x7f4,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 123) [ARB_ERR_CAP_MASTER] = 0x7f8,
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 124) };
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 125)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 126) struct brcmstb_gisb_arb_device {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 127) void __iomem *base;
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 128) const int *gisb_offsets;
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 129) bool big_endian;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 130) struct mutex lock;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 131) struct list_head next;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 132) u32 valid_mask;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 133) const char *master_names[sizeof(u32) * BITS_PER_BYTE];
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 134) u32 saved_timeout;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 135) };
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 136)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 137) static LIST_HEAD(brcmstb_gisb_arb_device_list);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 138)
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 139) static u32 gisb_read(struct brcmstb_gisb_arb_device *gdev, int reg)
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 140) {
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 141) int offset = gdev->gisb_offsets[reg];
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 142)
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 143) if (offset < 0) {
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 144) /* return 1 if the hardware doesn't have ARB_ERR_CAP_MASTER */
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 145) if (reg == ARB_ERR_CAP_MASTER)
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 146) return 1;
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 147) else
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 148) return 0;
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 149) }
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 150)
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 151) if (gdev->big_endian)
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 152) return ioread32be(gdev->base + offset);
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 153) else
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 154) return ioread32(gdev->base + offset);
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 155) }
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 156)
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 157) static u64 gisb_read_address(struct brcmstb_gisb_arb_device *gdev)
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 158) {
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 159) u64 value;
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 160)
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 161) value = gisb_read(gdev, ARB_ERR_CAP_ADDR);
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 162) value |= (u64)gisb_read(gdev, ARB_ERR_CAP_HI_ADDR) << 32;
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 163)
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 164) return value;
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 165) }
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 166)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 167) static u64 gisb_read_bp_address(struct brcmstb_gisb_arb_device *gdev)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 168) {
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 169) u64 value;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 170)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 171) value = gisb_read(gdev, ARB_BP_CAP_ADDR);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 172) value |= (u64)gisb_read(gdev, ARB_BP_CAP_HI_ADDR) << 32;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 173)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 174) return value;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 175) }
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 176)
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 177) static void gisb_write(struct brcmstb_gisb_arb_device *gdev, u32 val, int reg)
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 178) {
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 179) int offset = gdev->gisb_offsets[reg];
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 180)
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 181) if (offset == -1)
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 182) return;
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 183)
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 184) if (gdev->big_endian)
856c7ccb9ce7a (Doug Berger 2017-03-29 17:29:09 -0700 185) iowrite32be(val, gdev->base + offset);
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 186) else
856c7ccb9ce7a (Doug Berger 2017-03-29 17:29:09 -0700 187) iowrite32(val, gdev->base + offset);
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 188) }
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 189)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 190) static ssize_t gisb_arb_get_timeout(struct device *dev,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 191) struct device_attribute *attr,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 192) char *buf)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 193) {
0810d5cc29a1e (Wolfram Sang 2018-10-21 21:59:58 +0200 194) struct brcmstb_gisb_arb_device *gdev = dev_get_drvdata(dev);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 195) u32 timeout;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 196)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 197) mutex_lock(&gdev->lock);
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 198) timeout = gisb_read(gdev, ARB_TIMER);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 199) mutex_unlock(&gdev->lock);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 200)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 201) return sprintf(buf, "%d", timeout);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 202) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 203)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 204) static ssize_t gisb_arb_set_timeout(struct device *dev,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 205) struct device_attribute *attr,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 206) const char *buf, size_t count)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 207) {
0810d5cc29a1e (Wolfram Sang 2018-10-21 21:59:58 +0200 208) struct brcmstb_gisb_arb_device *gdev = dev_get_drvdata(dev);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 209) int val, ret;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 210)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 211) ret = kstrtoint(buf, 10, &val);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 212) if (ret < 0)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 213) return ret;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 214)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 215) if (val == 0 || val >= 0xffffffff)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 216) return -EINVAL;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 217)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 218) mutex_lock(&gdev->lock);
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 219) gisb_write(gdev, val, ARB_TIMER);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 220) mutex_unlock(&gdev->lock);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 221)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 222) return count;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 223) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 224)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 225) static const char *
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 226) brcmstb_gisb_master_to_str(struct brcmstb_gisb_arb_device *gdev,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 227) u32 masters)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 228) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 229) u32 mask = gdev->valid_mask & masters;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 230)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 231) if (hweight_long(mask) != 1)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 232) return NULL;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 233)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 234) return gdev->master_names[ffs(mask) - 1];
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 235) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 236)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 237) static int brcmstb_gisb_arb_decode_addr(struct brcmstb_gisb_arb_device *gdev,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 238) const char *reason)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 239) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 240) u32 cap_status;
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 241) u64 arb_addr;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 242) u32 master;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 243) const char *m_name;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 244) char m_fmt[11];
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 245)
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 246) cap_status = gisb_read(gdev, ARB_ERR_CAP_STATUS);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 247)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 248) /* Invalid captured address, bail out */
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 249) if (!(cap_status & ARB_ERR_CAP_STATUS_VALID))
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 250) return 1;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 251)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 252) /* Read the address and master */
0c2aa0e4b3088 (Doug Berger 2017-03-29 17:29:10 -0700 253) arb_addr = gisb_read_address(gdev);
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 254) master = gisb_read(gdev, ARB_ERR_CAP_MASTER);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 255)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 256) m_name = brcmstb_gisb_master_to_str(gdev, master);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 257) if (!m_name) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 258) snprintf(m_fmt, sizeof(m_fmt), "0x%08x", master);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 259) m_name = m_fmt;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 260) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 261)
c9864df48d2e0 (Florian Fainelli 2017-11-27 12:55:36 -0800 262) pr_crit("GISB: %s at 0x%llx [%c %s], core: %s\n",
c9864df48d2e0 (Florian Fainelli 2017-11-27 12:55:36 -0800 263) reason, arb_addr,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 264) cap_status & ARB_ERR_CAP_STATUS_WRITE ? 'W' : 'R',
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 265) cap_status & ARB_ERR_CAP_STATUS_TIMEOUT ? "timeout" : "",
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 266) m_name);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 267)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 268) /* clear the GISB error */
2b53eadcea05b (Kevin Cernekee 2014-11-25 16:49:50 -0800 269) gisb_write(gdev, ARB_ERR_CAP_CLEAR, ARB_ERR_CAP_CLR);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 270)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 271) return 0;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 272) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 273)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 274) #ifdef CONFIG_MIPS
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 275) static int brcmstb_bus_error_handler(struct pt_regs *regs, int is_fixup)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 276) {
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 277) int ret = 0;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 278) struct brcmstb_gisb_arb_device *gdev;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 279) u32 cap_status;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 280)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 281) list_for_each_entry(gdev, &brcmstb_gisb_arb_device_list, next) {
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 282) cap_status = gisb_read(gdev, ARB_ERR_CAP_STATUS);
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 283)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 284) /* Invalid captured address, bail out */
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 285) if (!(cap_status & ARB_ERR_CAP_STATUS_VALID)) {
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 286) is_fixup = 1;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 287) goto out;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 288) }
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 289)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 290) ret |= brcmstb_gisb_arb_decode_addr(gdev, "bus error");
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 291) }
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 292) out:
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 293) return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 294) }
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 295) #endif
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 296)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 297) static irqreturn_t brcmstb_gisb_timeout_handler(int irq, void *dev_id)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 298) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 299) brcmstb_gisb_arb_decode_addr(dev_id, "timeout");
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 300)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 301) return IRQ_HANDLED;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 302) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 303)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 304) static irqreturn_t brcmstb_gisb_tea_handler(int irq, void *dev_id)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 305) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 306) brcmstb_gisb_arb_decode_addr(dev_id, "target abort");
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 307)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 308) return IRQ_HANDLED;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 309) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 310)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 311) static irqreturn_t brcmstb_gisb_bp_handler(int irq, void *dev_id)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 312) {
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 313) struct brcmstb_gisb_arb_device *gdev = dev_id;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 314) const char *m_name;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 315) u32 bp_status;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 316) u64 arb_addr;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 317) u32 master;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 318) char m_fmt[11];
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 319)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 320) bp_status = gisb_read(gdev, ARB_BP_CAP_STATUS);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 321)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 322) /* Invalid captured address, bail out */
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 323) if (!(bp_status & ARB_BP_CAP_STATUS_VALID))
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 324) return IRQ_HANDLED;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 325)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 326) /* Read the address and master */
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 327) arb_addr = gisb_read_bp_address(gdev);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 328) master = gisb_read(gdev, ARB_BP_CAP_MASTER);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 329)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 330) m_name = brcmstb_gisb_master_to_str(gdev, master);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 331) if (!m_name) {
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 332) snprintf(m_fmt, sizeof(m_fmt), "0x%08x", master);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 333) m_name = m_fmt;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 334) }
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 335)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 336) pr_crit("GISB: breakpoint at 0x%llx [%c], core: %s\n",
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 337) arb_addr, bp_status & ARB_BP_CAP_STATUS_WRITE ? 'W' : 'R',
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 338) m_name);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 339)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 340) /* clear the GISB error */
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 341) gisb_write(gdev, ARB_ERR_CAP_CLEAR, ARB_ERR_CAP_CLR);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 342)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 343) return IRQ_HANDLED;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 344) }
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 345)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 346) /*
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 347) * Dump out gisb errors on die or panic.
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 348) */
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 349) static int dump_gisb_error(struct notifier_block *self, unsigned long v,
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 350) void *p);
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 351)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 352) static struct notifier_block gisb_die_notifier = {
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 353) .notifier_call = dump_gisb_error,
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 354) };
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 355)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 356) static struct notifier_block gisb_panic_notifier = {
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 357) .notifier_call = dump_gisb_error,
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 358) };
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 359)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 360) static int dump_gisb_error(struct notifier_block *self, unsigned long v,
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 361) void *p)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 362) {
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 363) struct brcmstb_gisb_arb_device *gdev;
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 364) const char *reason = "panic";
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 365)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 366) if (self == &gisb_die_notifier)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 367) reason = "die";
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 368)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 369) /* iterate over each GISB arb registered handlers */
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 370) list_for_each_entry(gdev, &brcmstb_gisb_arb_device_list, next)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 371) brcmstb_gisb_arb_decode_addr(gdev, reason);
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 372)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 373) return NOTIFY_DONE;
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 374) }
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 375)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 376) static DEVICE_ATTR(gisb_arb_timeout, S_IWUSR | S_IRUGO,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 377) gisb_arb_get_timeout, gisb_arb_set_timeout);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 378)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 379) static struct attribute *gisb_arb_sysfs_attrs[] = {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 380) &dev_attr_gisb_arb_timeout.attr,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 381) NULL,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 382) };
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 383)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 384) static struct attribute_group gisb_arb_sysfs_attr_group = {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 385) .attrs = gisb_arb_sysfs_attrs,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 386) };
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 387)
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 388) static const struct of_device_id brcmstb_gisb_arb_of_match[] = {
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 389) { .compatible = "brcm,gisb-arb", .data = gisb_offsets_bcm7445 },
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 390) { .compatible = "brcm,bcm7445-gisb-arb", .data = gisb_offsets_bcm7445 },
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 391) { .compatible = "brcm,bcm7435-gisb-arb", .data = gisb_offsets_bcm7435 },
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 392) { .compatible = "brcm,bcm7400-gisb-arb", .data = gisb_offsets_bcm7400 },
d523e0cfdca37 (Doug Berger 2017-03-29 17:29:14 -0700 393) { .compatible = "brcm,bcm7278-gisb-arb", .data = gisb_offsets_bcm7278 },
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 394) { .compatible = "brcm,bcm7038-gisb-arb", .data = gisb_offsets_bcm7038 },
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 395) { },
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 396) };
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 397)
2e8a29a1c9aaa (Florian Fainelli 2014-11-20 10:14:46 -0800 398) static int __init brcmstb_gisb_arb_probe(struct platform_device *pdev)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 399) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 400) struct device_node *dn = pdev->dev.of_node;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 401) struct brcmstb_gisb_arb_device *gdev;
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 402) const struct of_device_id *of_id;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 403) struct resource *r;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 404) int err, timeout_irq, tea_irq, bp_irq;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 405) unsigned int num_masters, j = 0;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 406) int i, first, last;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 407)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 408) r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 409) timeout_irq = platform_get_irq(pdev, 0);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 410) tea_irq = platform_get_irq(pdev, 1);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 411) bp_irq = platform_get_irq(pdev, 2);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 412)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 413) gdev = devm_kzalloc(&pdev->dev, sizeof(*gdev), GFP_KERNEL);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 414) if (!gdev)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 415) return -ENOMEM;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 416)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 417) mutex_init(&gdev->lock);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 418) INIT_LIST_HEAD(&gdev->next);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 419)
c9d53c0f2d23c (Jingoo Han 2014-06-11 14:00:05 +0900 420) gdev->base = devm_ioremap_resource(&pdev->dev, r);
c9d53c0f2d23c (Jingoo Han 2014-06-11 14:00:05 +0900 421) if (IS_ERR(gdev->base))
c9d53c0f2d23c (Jingoo Han 2014-06-11 14:00:05 +0900 422) return PTR_ERR(gdev->base);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 423)
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 424) of_id = of_match_node(brcmstb_gisb_arb_of_match, dn);
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 425) if (!of_id) {
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 426) pr_err("failed to look up compatible string\n");
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 427) return -EINVAL;
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 428) }
d1d6786846e1c (Kevin Cernekee 2014-11-25 16:49:52 -0800 429) gdev->gisb_offsets = of_id->data;
fbf4e262bb505 (Kevin Cernekee 2014-11-25 16:49:53 -0800 430) gdev->big_endian = of_device_is_big_endian(dn);
f80835875d3d1 (Kevin Cernekee 2014-11-25 16:49:51 -0800 431)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 432) err = devm_request_irq(&pdev->dev, timeout_irq,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 433) brcmstb_gisb_timeout_handler, 0, pdev->name,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 434) gdev);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 435) if (err < 0)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 436) return err;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 437)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 438) err = devm_request_irq(&pdev->dev, tea_irq,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 439) brcmstb_gisb_tea_handler, 0, pdev->name,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 440) gdev);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 441) if (err < 0)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 442) return err;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 443)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 444) /* Interrupt is optional */
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 445) if (bp_irq > 0) {
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 446) err = devm_request_irq(&pdev->dev, bp_irq,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 447) brcmstb_gisb_bp_handler, 0, pdev->name,
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 448) gdev);
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 449) if (err < 0)
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 450) return err;
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 451) }
fb8a0b80c4bb4 (Florian Fainelli 2020-04-17 17:21:32 -0700 452)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 453) /* If we do not have a valid mask, assume all masters are enabled */
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 454) if (of_property_read_u32(dn, "brcm,gisb-arb-master-mask",
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 455) &gdev->valid_mask))
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 456) gdev->valid_mask = 0xffffffff;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 457)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 458) /* Proceed with reading the litteral names if we agree on the
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 459) * number of masters
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 460) */
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 461) num_masters = of_property_count_strings(dn,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 462) "brcm,gisb-arb-master-names");
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 463) if (hweight_long(gdev->valid_mask) == num_masters) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 464) first = ffs(gdev->valid_mask) - 1;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 465) last = fls(gdev->valid_mask) - 1;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 466)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 467) for (i = first; i < last; i++) {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 468) if (!(gdev->valid_mask & BIT(i)))
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 469) continue;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 470)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 471) of_property_read_string_index(dn,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 472) "brcm,gisb-arb-master-names", j,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 473) &gdev->master_names[i]);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 474) j++;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 475) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 476) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 477)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 478) err = sysfs_create_group(&pdev->dev.kobj, &gisb_arb_sysfs_attr_group);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 479) if (err)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 480) return err;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 481)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 482) platform_set_drvdata(pdev, gdev);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 483)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 484) list_add_tail(&gdev->next, &brcmstb_gisb_arb_device_list);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 485)
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 486) #ifdef CONFIG_MIPS
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 487) board_be_handler = brcmstb_bus_error_handler;
c400d5ebec182 (Florian Fainelli 2016-01-31 12:29:27 -0800 488) #endif
f1bee783dd37d (Florian Fainelli 2014-09-18 12:32:10 -0700 489)
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 490) if (list_is_singular(&brcmstb_gisb_arb_device_list)) {
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 491) register_die_notifier(&gisb_die_notifier);
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 492) atomic_notifier_chain_register(&panic_notifier_list,
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 493) &gisb_panic_notifier);
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 494) }
9eb60880d9a97 (Doug Berger 2017-03-29 17:29:11 -0700 495)
3087974a3df8a (Florian Fainelli 2019-03-20 12:40:56 -0700 496) dev_info(&pdev->dev, "registered irqs: %d, %d\n",
3087974a3df8a (Florian Fainelli 2019-03-20 12:40:56 -0700 497) timeout_irq, tea_irq);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 498)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 499) return 0;
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 500) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 501)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 502) #ifdef CONFIG_PM_SLEEP
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 503) static int brcmstb_gisb_arb_suspend(struct device *dev)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 504) {
0810d5cc29a1e (Wolfram Sang 2018-10-21 21:59:58 +0200 505) struct brcmstb_gisb_arb_device *gdev = dev_get_drvdata(dev);
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 506)
7135466151f05 (Arnd Bergmann 2014-12-08 17:16:03 +0100 507) gdev->saved_timeout = gisb_read(gdev, ARB_TIMER);
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 508)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 509) return 0;
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 510) }
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 511)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 512) /* Make sure we provide the same timeout value that was configured before, and
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 513) * do this before the GISB timeout interrupt handler has any chance to run.
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 514) */
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 515) static int brcmstb_gisb_arb_resume_noirq(struct device *dev)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 516) {
0810d5cc29a1e (Wolfram Sang 2018-10-21 21:59:58 +0200 517) struct brcmstb_gisb_arb_device *gdev = dev_get_drvdata(dev);
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 518)
7135466151f05 (Arnd Bergmann 2014-12-08 17:16:03 +0100 519) gisb_write(gdev, gdev->saved_timeout, ARB_TIMER);
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 520)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 521) return 0;
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 522) }
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 523) #else
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 524) #define brcmstb_gisb_arb_suspend NULL
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 525) #define brcmstb_gisb_arb_resume_noirq NULL
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 526) #endif
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 527)
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 528) static const struct dev_pm_ops brcmstb_gisb_arb_pm_ops = {
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 529) .suspend = brcmstb_gisb_arb_suspend,
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 530) .resume_noirq = brcmstb_gisb_arb_resume_noirq,
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 531) };
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 532)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 533) static struct platform_driver brcmstb_gisb_arb_driver = {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 534) .driver = {
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 535) .name = "brcm-gisb-arb",
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 536) .of_match_table = brcmstb_gisb_arb_of_match,
203bb85ed605e (Florian Fainelli 2014-09-18 12:37:14 -0700 537) .pm = &brcmstb_gisb_arb_pm_ops,
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 538) },
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 539) };
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 540)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 541) static int __init brcm_gisb_driver_init(void)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 542) {
2e8a29a1c9aaa (Florian Fainelli 2014-11-20 10:14:46 -0800 543) return platform_driver_probe(&brcmstb_gisb_arb_driver,
2e8a29a1c9aaa (Florian Fainelli 2014-11-20 10:14:46 -0800 544) brcmstb_gisb_arb_probe);
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 545) }
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 546)
44127b771d9c3 (Florian Fainelli 2014-05-19 13:05:59 -0700 547) module_init(brcm_gisb_driver_init);
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
More than 9999 Commits
32 Branches
54 Tags