1 // SPDX-License-Identifier: GPL-2.0-only
8  * Kylene Hall <kjhall@us.ibm.com>
10  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
38 	 * irq = -1 means: no irq support
53 static int interrupts = -1;
55 MODULE_PARM_DESC(interrupts, "Enable interrupts");
69 	if (interrupts == -1) {  in tpm_tis_disable_irq()
70 		pr_notice("tpm_tis: %s detected: disabling interrupts.\n", d->ident);  in tpm_tis_disable_irq()
94 	list_for_each_entry(id, &dev->pnp.ids, list)  in has_hid()
95 		if (!strcmp(hid, id->id))  in has_hid()
129 	if (!aid || aid->driver_data != DEVICE_IS_TPM2)  in check_acpi_tpm2()
137 	if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) {  in check_acpi_tpm2()
139 		return -EINVAL;  in check_acpi_tpm2()
143 	if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED)  in check_acpi_tpm2()
144 		return -ENODEV;  in check_acpi_tpm2()
160 	while (len--)  in tpm_tcg_read_bytes()
161 		*result++ = ioread8(phy->iobase + addr);  in tpm_tcg_read_bytes()
171 	while (len--)  in tpm_tcg_write_bytes()
172 		iowrite8(*value++, phy->iobase + addr);  in tpm_tcg_write_bytes()
181 	*result = ioread16(phy->iobase + addr);  in tpm_tcg_read16()
190 	*result = ioread32(phy->iobase + addr);  in tpm_tcg_read32()
199 	iowrite32(value, phy->iobase + addr);  in tpm_tcg_write32()
215 	int irq = -1;  in tpm_tis_init()
226 		return -ENOMEM;  in tpm_tis_init()
228 	phy->iobase = devm_ioremap_resource(dev, &tpm_info->res);  in tpm_tis_init()
229 	if (IS_ERR(phy->iobase))  in tpm_tis_init()
230 		return PTR_ERR(phy->iobase);  in tpm_tis_init()
233 		irq = tpm_info->irq;  in tpm_tis_init()
236 		phy->priv.flags |= TPM_TIS_ITPM_WORKAROUND;  in tpm_tis_init()
238 	return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,  in tpm_tis_init()
252 		return -ENODEV;  in tpm_tis_pnp_init()
258 		tpm_info.irq = -1;  in tpm_tis_pnp_init()
260 	return tpm_tis_init(&pnp_dev->dev, &tpm_info);  in tpm_tis_pnp_init()
302 #define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
316 		dev_err(&pdev->dev, "no memory resource defined\n");  in tpm_tis_plat_probe()
317 		return -ENODEV;  in tpm_tis_plat_probe()
324 			tpm_info.irq = -1;  in tpm_tis_plat_probe()
330 	return tpm_tis_init(&pdev->dev, &tpm_info);  in tpm_tis_plat_probe()
335 	struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);  in tpm_tis_plat_remove()
345 	{.compatible = "tcg,tpm-tis-mmio"},
368 			.end = 0xFED40000 + TIS_MEM_LEN - 1,  in tpm_tis_force_device()
380 	pdev = platform_device_register_simple("tpm_tis", -1, x86_resources,  in tpm_tis_force_device()