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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | // SPDX-License-Identifier: GPL-2.0-only // Copyright(c) 2023 Intel Corporation. All rights reserved. #include <linux/acpi.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/io.h> #include <linux/pm_runtime.h> #include <linux/soundwire/sdw.h> #include <linux/soundwire/sdw_intel.h> #include <linux/soundwire/sdw_registers.h> #include "bus.h" #include "cadence_master.h" #include "intel.h" /* * debugfs */ #ifdef CONFIG_DEBUG_FS #define RD_BUF (2 * PAGE_SIZE) static ssize_t intel_sprintf(void __iomem *mem, bool l, char *buf, size_t pos, unsigned int reg) { int value; if (l) value = intel_readl(mem, reg); else value = intel_readw(mem, reg); return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value); } static int intel_reg_show(struct seq_file *s_file, void *data) { struct sdw_intel *sdw = s_file->private; void __iomem *s = sdw->link_res->shim; void __iomem *vs_s = sdw->link_res->shim_vs; ssize_t ret; u32 pcm_cap; int pcm_bd; char *buf; int j; buf = kzalloc(RD_BUF, GFP_KERNEL); if (!buf) return -ENOMEM; ret = scnprintf(buf, RD_BUF, "Register Value\n"); ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n"); ret += intel_sprintf(s, true, buf, ret, SDW_SHIM2_LECAP); ret += intel_sprintf(s, false, buf, ret, SDW_SHIM2_PCMSCAP); pcm_cap = intel_readw(s, SDW_SHIM2_PCMSCAP); pcm_bd = FIELD_GET(SDW_SHIM2_PCMSCAP_BSS, pcm_cap); for (j = 0; j < pcm_bd; j++) { ret += intel_sprintf(s, false, buf, ret, SDW_SHIM2_PCMSYCHM(j)); ret += intel_sprintf(s, false, buf, ret, SDW_SHIM2_PCMSYCHC(j)); } ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS CLK controls\n"); ret += intel_sprintf(vs_s, true, buf, ret, SDW_SHIM2_INTEL_VS_LVSCTL); ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS Wake registers\n"); ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_WAKEEN); ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_WAKESTS); ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS IOCTL, ACTMCTL\n"); ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_IOCTL); ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_ACTMCTL); seq_printf(s_file, "%s", buf); kfree(buf); return 0; } DEFINE_SHOW_ATTRIBUTE(intel_reg); static int intel_set_m_datamode(void *data, u64 value) { struct sdw_intel *sdw = data; struct sdw_bus *bus = &sdw->cdns.bus; if (value > SDW_PORT_DATA_MODE_STATIC_1) return -EINVAL; /* Userspace changed the hardware state behind the kernel's back */ add_taint(TAINT_USER, LOCKDEP_STILL_OK); bus->params.m_data_mode = value; return 0; } DEFINE_DEBUGFS_ATTRIBUTE(intel_set_m_datamode_fops, NULL, intel_set_m_datamode, "%llu\n"); static int intel_set_s_datamode(void *data, u64 value) { struct sdw_intel *sdw = data; struct sdw_bus *bus = &sdw->cdns.bus; if (value > SDW_PORT_DATA_MODE_STATIC_1) return -EINVAL; /* Userspace changed the hardware state behind the kernel's back */ add_taint(TAINT_USER, LOCKDEP_STILL_OK); bus->params.s_data_mode = value; return 0; } DEFINE_DEBUGFS_ATTRIBUTE(intel_set_s_datamode_fops, NULL, intel_set_s_datamode, "%llu\n"); void intel_ace2x_debugfs_init(struct sdw_intel *sdw) { struct dentry *root = sdw->cdns.bus.debugfs; if (!root) return; sdw->debugfs = debugfs_create_dir("intel-sdw", root); debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw, &intel_reg_fops); debugfs_create_file("intel-m-datamode", 0200, sdw->debugfs, sdw, &intel_set_m_datamode_fops); debugfs_create_file("intel-s-datamode", 0200, sdw->debugfs, sdw, &intel_set_s_datamode_fops); sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs); } void intel_ace2x_debugfs_exit(struct sdw_intel *sdw) { debugfs_remove_recursive(sdw->debugfs); } #endif /* CONFIG_DEBUG_FS */ |