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| 1 | +// SPDX-License-Identifier: GPL-2.0-only |
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1 | 2 | /* |
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2 | 3 | * Copyright (C) 2005, 2006 IBM Corporation |
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3 | 4 | * Copyright (C) 2014, 2015 Intel Corporation |
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.. | .. |
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13 | 14 | * |
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14 | 15 | * This device driver implements the TPM interface as defined in |
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15 | 16 | * the TCG TPM Interface Spec version 1.2, revision 1.0. |
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16 | | - * |
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17 | | - * This program is free software; you can redistribute it and/or |
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18 | | - * modify it under the terms of the GNU General Public License as |
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19 | | - * published by the Free Software Foundation, version 2 of the |
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20 | | - * License. |
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21 | 17 | */ |
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22 | 18 | #include <linux/init.h> |
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23 | 19 | #include <linux/module.h> |
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.. | .. |
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54 | 50 | return container_of(data, struct tpm_tis_tcg_phy, priv); |
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55 | 51 | } |
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56 | 52 | |
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57 | | -#ifdef CONFIG_PREEMPT_RT_FULL |
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58 | | -/* |
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59 | | - * Flushes previous write operations to chip so that a subsequent |
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60 | | - * ioread*()s won't stall a cpu. |
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61 | | - */ |
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62 | | -static inline void tpm_tis_flush(void __iomem *iobase) |
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63 | | -{ |
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64 | | - ioread8(iobase + TPM_ACCESS(0)); |
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65 | | -} |
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66 | | -#else |
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67 | | -#define tpm_tis_flush(iobase) do { } while (0) |
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68 | | -#endif |
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69 | | - |
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70 | | -static inline void tpm_tis_iowrite8(u8 b, void __iomem *iobase, u32 addr) |
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71 | | -{ |
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72 | | - iowrite8(b, iobase + addr); |
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73 | | - tpm_tis_flush(iobase); |
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74 | | -} |
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75 | | - |
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76 | | -static inline void tpm_tis_iowrite32(u32 b, void __iomem *iobase, u32 addr) |
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77 | | -{ |
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78 | | - iowrite32(b, iobase + addr); |
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79 | | - tpm_tis_flush(iobase); |
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80 | | -} |
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81 | | - |
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82 | 53 | static int interrupts = -1; |
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83 | 54 | module_param(interrupts, int, 0444); |
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84 | 55 | MODULE_PARM_DESC(interrupts, "Enable interrupts"); |
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.. | .. |
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110 | 81 | .matches = { |
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111 | 82 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
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112 | 83 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"), |
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| 84 | + }, |
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| 85 | + }, |
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| 86 | + { |
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| 87 | + .callback = tpm_tis_disable_irq, |
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| 88 | + .ident = "ThinkStation P360 Tiny", |
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| 89 | + .matches = { |
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| 90 | + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
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| 91 | + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkStation P360 Tiny"), |
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| 92 | + }, |
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| 93 | + }, |
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| 94 | + { |
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| 95 | + .callback = tpm_tis_disable_irq, |
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| 96 | + .ident = "ThinkPad L490", |
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| 97 | + .matches = { |
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| 98 | + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
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| 99 | + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L490"), |
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113 | 100 | }, |
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114 | 101 | }, |
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115 | 102 | {} |
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.. | .. |
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154 | 141 | const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev); |
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155 | 142 | struct acpi_table_tpm2 *tbl; |
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156 | 143 | acpi_status st; |
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| 144 | + int ret = 0; |
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157 | 145 | |
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158 | 146 | if (!aid || aid->driver_data != DEVICE_IS_TPM2) |
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159 | 147 | return 0; |
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.. | .. |
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161 | 149 | /* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2 |
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162 | 150 | * table is mandatory |
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163 | 151 | */ |
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164 | | - st = |
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165 | | - acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl); |
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| 152 | + st = acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl); |
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166 | 153 | if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) { |
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167 | 154 | dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n"); |
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168 | 155 | return -EINVAL; |
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.. | .. |
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170 | 157 | |
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171 | 158 | /* The tpm2_crb driver handles this device */ |
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172 | 159 | if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED) |
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173 | | - return -ENODEV; |
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| 160 | + ret = -ENODEV; |
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174 | 161 | |
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175 | | - return 0; |
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| 162 | + acpi_put_table((struct acpi_table_header *)tbl); |
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| 163 | + return ret; |
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176 | 164 | } |
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177 | 165 | #else |
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178 | 166 | static int check_acpi_tpm2(struct device *dev) |
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.. | .. |
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198 | 186 | struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data); |
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199 | 187 | |
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200 | 188 | while (len--) |
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201 | | - tpm_tis_iowrite8(*value++, phy->iobase, addr); |
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| 189 | + iowrite8(*value++, phy->iobase + addr); |
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202 | 190 | |
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203 | 191 | return 0; |
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204 | 192 | } |
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.. | .. |
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225 | 213 | { |
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226 | 214 | struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data); |
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227 | 215 | |
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228 | | - tpm_tis_iowrite32(value, phy->iobase, addr); |
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| 216 | + iowrite32(value, phy->iobase + addr); |
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229 | 217 | |
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230 | 218 | return 0; |
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231 | 219 | } |
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.. | .. |
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289 | 277 | return tpm_tis_init(&pnp_dev->dev, &tpm_info); |
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290 | 278 | } |
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291 | 279 | |
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| 280 | +/* |
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| 281 | + * There is a known bug caused by 93e1b7d42e1e ("[PATCH] tpm: add HID module |
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| 282 | + * parameter"). This commit added IFX0102 device ID, which is also used by |
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| 283 | + * tpm_infineon but ignored to add quirks to probe which driver ought to be |
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| 284 | + * used. |
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| 285 | + */ |
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| 286 | + |
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292 | 287 | static struct pnp_device_id tpm_pnp_tbl[] = { |
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293 | 288 | {"PNP0C31", 0}, /* TPM */ |
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294 | 289 | {"ATM1200", 0}, /* Atmel */ |
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.. | .. |
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340 | 335 | } |
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341 | 336 | tpm_info.res = *res; |
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342 | 337 | |
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343 | | - tpm_info.irq = platform_get_irq(pdev, 0); |
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| 338 | + tpm_info.irq = platform_get_irq_optional(pdev, 0); |
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344 | 339 | if (tpm_info.irq <= 0) { |
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345 | 340 | if (pdev != force_pdev) |
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346 | 341 | tpm_info.irq = -1; |
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