1faaca0a0SJarkko Sakkinen // SPDX-License-Identifier: GPL-2.0-only
2faaca0a0SJarkko Sakkinen /*
3faaca0a0SJarkko Sakkinen * Copyright (C) 2015 Infineon Technologies AG
4faaca0a0SJarkko Sakkinen * Copyright (C) 2016 STMicroelectronics SAS
5faaca0a0SJarkko Sakkinen *
6faaca0a0SJarkko Sakkinen * Authors:
7faaca0a0SJarkko Sakkinen * Peter Huewe <peter.huewe@infineon.com>
8faaca0a0SJarkko Sakkinen * Christophe Ricard <christophe-h.ricard@st.com>
9faaca0a0SJarkko Sakkinen *
10faaca0a0SJarkko Sakkinen * Maintained by: <tpmdd-devel@lists.sourceforge.net>
11faaca0a0SJarkko Sakkinen *
12faaca0a0SJarkko Sakkinen * Device driver for TCG/TCPA TPM (trusted platform module).
13faaca0a0SJarkko Sakkinen * Specifications at www.trustedcomputinggroup.org
14faaca0a0SJarkko Sakkinen *
15faaca0a0SJarkko Sakkinen * This device driver implements the TPM interface as defined in
16faaca0a0SJarkko Sakkinen * the TCG TPM Interface Spec version 1.3, revision 27 via _raw/native
17faaca0a0SJarkko Sakkinen * SPI access_.
18faaca0a0SJarkko Sakkinen *
19faaca0a0SJarkko Sakkinen * It is based on the original tpm_tis device driver from Leendert van
20faaca0a0SJarkko Sakkinen * Dorn and Kyleen Hall and Jarko Sakkinnen.
21faaca0a0SJarkko Sakkinen */
22faaca0a0SJarkko Sakkinen
23faaca0a0SJarkko Sakkinen #include <linux/acpi.h>
24faaca0a0SJarkko Sakkinen #include <linux/completion.h>
25faaca0a0SJarkko Sakkinen #include <linux/init.h>
26faaca0a0SJarkko Sakkinen #include <linux/interrupt.h>
27faaca0a0SJarkko Sakkinen #include <linux/kernel.h>
28faaca0a0SJarkko Sakkinen #include <linux/module.h>
29faaca0a0SJarkko Sakkinen #include <linux/slab.h>
30faaca0a0SJarkko Sakkinen
31ae36453aSRob Herring #include <linux/of.h>
32faaca0a0SJarkko Sakkinen #include <linux/spi/spi.h>
33faaca0a0SJarkko Sakkinen #include <linux/tpm.h>
34faaca0a0SJarkko Sakkinen
35faaca0a0SJarkko Sakkinen #include "tpm.h"
36faaca0a0SJarkko Sakkinen #include "tpm_tis_core.h"
37faaca0a0SJarkko Sakkinen #include "tpm_tis_spi.h"
38faaca0a0SJarkko Sakkinen
39faaca0a0SJarkko Sakkinen #define MAX_SPI_FRAMESIZE 64
4015471838SMatthew R. Ochs #define SPI_HDRSIZE 4
41faaca0a0SJarkko Sakkinen
42faaca0a0SJarkko Sakkinen /*
43faaca0a0SJarkko Sakkinen * TCG SPI flow control is documented in section 6.4 of the spec[1]. In short,
44faaca0a0SJarkko Sakkinen * keep trying to read from the device until MISO goes high indicating the
45faaca0a0SJarkko Sakkinen * wait state has ended.
46faaca0a0SJarkko Sakkinen *
47faaca0a0SJarkko Sakkinen * [1] https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
48faaca0a0SJarkko Sakkinen */
tpm_tis_spi_flow_control(struct tpm_tis_spi_phy * phy,struct spi_transfer * spi_xfer)49faaca0a0SJarkko Sakkinen static int tpm_tis_spi_flow_control(struct tpm_tis_spi_phy *phy,
50faaca0a0SJarkko Sakkinen struct spi_transfer *spi_xfer)
51faaca0a0SJarkko Sakkinen {
52faaca0a0SJarkko Sakkinen struct spi_message m;
53faaca0a0SJarkko Sakkinen int ret, i;
54faaca0a0SJarkko Sakkinen
55faaca0a0SJarkko Sakkinen if ((phy->iobuf[3] & 0x01) == 0) {
56faaca0a0SJarkko Sakkinen // handle SPI wait states
57faaca0a0SJarkko Sakkinen for (i = 0; i < TPM_RETRY; i++) {
58faaca0a0SJarkko Sakkinen spi_xfer->len = 1;
59faaca0a0SJarkko Sakkinen spi_message_init(&m);
60faaca0a0SJarkko Sakkinen spi_message_add_tail(spi_xfer, &m);
61faaca0a0SJarkko Sakkinen ret = spi_sync_locked(phy->spi_device, &m);
62faaca0a0SJarkko Sakkinen if (ret < 0)
63faaca0a0SJarkko Sakkinen return ret;
64faaca0a0SJarkko Sakkinen if (phy->iobuf[0] & 0x01)
65faaca0a0SJarkko Sakkinen break;
66faaca0a0SJarkko Sakkinen }
67faaca0a0SJarkko Sakkinen
68faaca0a0SJarkko Sakkinen if (i == TPM_RETRY)
69faaca0a0SJarkko Sakkinen return -ETIMEDOUT;
70faaca0a0SJarkko Sakkinen }
71faaca0a0SJarkko Sakkinen
72faaca0a0SJarkko Sakkinen return 0;
73faaca0a0SJarkko Sakkinen }
74faaca0a0SJarkko Sakkinen
75a86a42acSKrishna Yarlagadda /*
76a86a42acSKrishna Yarlagadda * Half duplex controller with support for TPM wait state detection like
77a86a42acSKrishna Yarlagadda * Tegra QSPI need CMD, ADDR & DATA sent in single message to manage HW flow
78a86a42acSKrishna Yarlagadda * control. Each phase sent in different transfer for controller to idenity
79a86a42acSKrishna Yarlagadda * phase.
80a86a42acSKrishna Yarlagadda */
tpm_tis_spi_transfer_half(struct tpm_tis_data * data,u32 addr,u16 len,u8 * in,const u8 * out)81a86a42acSKrishna Yarlagadda static int tpm_tis_spi_transfer_half(struct tpm_tis_data *data, u32 addr,
82a86a42acSKrishna Yarlagadda u16 len, u8 *in, const u8 *out)
83a86a42acSKrishna Yarlagadda {
84a86a42acSKrishna Yarlagadda struct tpm_tis_spi_phy *phy = to_tpm_tis_spi_phy(data);
85a86a42acSKrishna Yarlagadda struct spi_transfer spi_xfer[3];
86a86a42acSKrishna Yarlagadda struct spi_message m;
87a86a42acSKrishna Yarlagadda u8 transfer_len;
88a86a42acSKrishna Yarlagadda int ret;
89a86a42acSKrishna Yarlagadda
90a86a42acSKrishna Yarlagadda while (len) {
91a86a42acSKrishna Yarlagadda transfer_len = min_t(u16, len, MAX_SPI_FRAMESIZE);
92a86a42acSKrishna Yarlagadda
93a86a42acSKrishna Yarlagadda spi_message_init(&m);
94a86a42acSKrishna Yarlagadda phy->iobuf[0] = (in ? 0x80 : 0) | (transfer_len - 1);
95a86a42acSKrishna Yarlagadda phy->iobuf[1] = 0xd4;
96a86a42acSKrishna Yarlagadda phy->iobuf[2] = addr >> 8;
97a86a42acSKrishna Yarlagadda phy->iobuf[3] = addr;
98a86a42acSKrishna Yarlagadda
99a86a42acSKrishna Yarlagadda memset(&spi_xfer, 0, sizeof(spi_xfer));
100a86a42acSKrishna Yarlagadda
101a86a42acSKrishna Yarlagadda spi_xfer[0].tx_buf = phy->iobuf;
102a86a42acSKrishna Yarlagadda spi_xfer[0].len = 1;
103a86a42acSKrishna Yarlagadda spi_message_add_tail(&spi_xfer[0], &m);
104a86a42acSKrishna Yarlagadda
105a86a42acSKrishna Yarlagadda spi_xfer[1].tx_buf = phy->iobuf + 1;
106a86a42acSKrishna Yarlagadda spi_xfer[1].len = 3;
107a86a42acSKrishna Yarlagadda spi_message_add_tail(&spi_xfer[1], &m);
108a86a42acSKrishna Yarlagadda
109a86a42acSKrishna Yarlagadda if (out) {
110a86a42acSKrishna Yarlagadda spi_xfer[2].tx_buf = &phy->iobuf[4];
111a86a42acSKrishna Yarlagadda spi_xfer[2].rx_buf = NULL;
112a86a42acSKrishna Yarlagadda memcpy(&phy->iobuf[4], out, transfer_len);
113a86a42acSKrishna Yarlagadda out += transfer_len;
114a86a42acSKrishna Yarlagadda }
115a86a42acSKrishna Yarlagadda
116a86a42acSKrishna Yarlagadda if (in) {
117a86a42acSKrishna Yarlagadda spi_xfer[2].tx_buf = NULL;
118a86a42acSKrishna Yarlagadda spi_xfer[2].rx_buf = &phy->iobuf[4];
119a86a42acSKrishna Yarlagadda }
120a86a42acSKrishna Yarlagadda
121a86a42acSKrishna Yarlagadda spi_xfer[2].len = transfer_len;
122a86a42acSKrishna Yarlagadda spi_message_add_tail(&spi_xfer[2], &m);
123a86a42acSKrishna Yarlagadda
124a86a42acSKrishna Yarlagadda reinit_completion(&phy->ready);
125a86a42acSKrishna Yarlagadda
126a86a42acSKrishna Yarlagadda ret = spi_sync(phy->spi_device, &m);
127a86a42acSKrishna Yarlagadda if (ret < 0)
128a86a42acSKrishna Yarlagadda return ret;
129a86a42acSKrishna Yarlagadda
130a86a42acSKrishna Yarlagadda if (in) {
131a86a42acSKrishna Yarlagadda memcpy(in, &phy->iobuf[4], transfer_len);
132a86a42acSKrishna Yarlagadda in += transfer_len;
133a86a42acSKrishna Yarlagadda }
134a86a42acSKrishna Yarlagadda
135a86a42acSKrishna Yarlagadda len -= transfer_len;
136a86a42acSKrishna Yarlagadda }
137a86a42acSKrishna Yarlagadda
138a86a42acSKrishna Yarlagadda return ret;
139a86a42acSKrishna Yarlagadda }
140a86a42acSKrishna Yarlagadda
tpm_tis_spi_transfer_full(struct tpm_tis_data * data,u32 addr,u16 len,u8 * in,const u8 * out)141a86a42acSKrishna Yarlagadda static int tpm_tis_spi_transfer_full(struct tpm_tis_data *data, u32 addr,
142a86a42acSKrishna Yarlagadda u16 len, u8 *in, const u8 *out)
143faaca0a0SJarkko Sakkinen {
144faaca0a0SJarkko Sakkinen struct tpm_tis_spi_phy *phy = to_tpm_tis_spi_phy(data);
145faaca0a0SJarkko Sakkinen int ret = 0;
146faaca0a0SJarkko Sakkinen struct spi_message m;
147faaca0a0SJarkko Sakkinen struct spi_transfer spi_xfer;
148faaca0a0SJarkko Sakkinen u8 transfer_len;
149faaca0a0SJarkko Sakkinen
150faaca0a0SJarkko Sakkinen spi_bus_lock(phy->spi_device->master);
151faaca0a0SJarkko Sakkinen
152faaca0a0SJarkko Sakkinen while (len) {
153faaca0a0SJarkko Sakkinen transfer_len = min_t(u16, len, MAX_SPI_FRAMESIZE);
154faaca0a0SJarkko Sakkinen
155faaca0a0SJarkko Sakkinen phy->iobuf[0] = (in ? 0x80 : 0) | (transfer_len - 1);
156faaca0a0SJarkko Sakkinen phy->iobuf[1] = 0xd4;
157faaca0a0SJarkko Sakkinen phy->iobuf[2] = addr >> 8;
158faaca0a0SJarkko Sakkinen phy->iobuf[3] = addr;
159faaca0a0SJarkko Sakkinen
160faaca0a0SJarkko Sakkinen memset(&spi_xfer, 0, sizeof(spi_xfer));
161faaca0a0SJarkko Sakkinen spi_xfer.tx_buf = phy->iobuf;
162faaca0a0SJarkko Sakkinen spi_xfer.rx_buf = phy->iobuf;
163faaca0a0SJarkko Sakkinen spi_xfer.len = 4;
164faaca0a0SJarkko Sakkinen spi_xfer.cs_change = 1;
165faaca0a0SJarkko Sakkinen
166faaca0a0SJarkko Sakkinen spi_message_init(&m);
167faaca0a0SJarkko Sakkinen spi_message_add_tail(&spi_xfer, &m);
168faaca0a0SJarkko Sakkinen ret = spi_sync_locked(phy->spi_device, &m);
169faaca0a0SJarkko Sakkinen if (ret < 0)
170faaca0a0SJarkko Sakkinen goto exit;
171faaca0a0SJarkko Sakkinen
172eac9347dSDouglas Anderson /* Flow control transfers are receive only */
173eac9347dSDouglas Anderson spi_xfer.tx_buf = NULL;
174faaca0a0SJarkko Sakkinen ret = phy->flow_control(phy, &spi_xfer);
175faaca0a0SJarkko Sakkinen if (ret < 0)
176faaca0a0SJarkko Sakkinen goto exit;
177faaca0a0SJarkko Sakkinen
178faaca0a0SJarkko Sakkinen spi_xfer.cs_change = 0;
179faaca0a0SJarkko Sakkinen spi_xfer.len = transfer_len;
180ad28db73SAlexandru Ardelean spi_xfer.delay.value = 5;
181ad28db73SAlexandru Ardelean spi_xfer.delay.unit = SPI_DELAY_UNIT_USECS;
182faaca0a0SJarkko Sakkinen
183eac9347dSDouglas Anderson if (out) {
184eac9347dSDouglas Anderson spi_xfer.tx_buf = phy->iobuf;
185faaca0a0SJarkko Sakkinen spi_xfer.rx_buf = NULL;
186faaca0a0SJarkko Sakkinen memcpy(phy->iobuf, out, transfer_len);
187faaca0a0SJarkko Sakkinen out += transfer_len;
188faaca0a0SJarkko Sakkinen }
189faaca0a0SJarkko Sakkinen
190faaca0a0SJarkko Sakkinen spi_message_init(&m);
191faaca0a0SJarkko Sakkinen spi_message_add_tail(&spi_xfer, &m);
192faaca0a0SJarkko Sakkinen reinit_completion(&phy->ready);
193faaca0a0SJarkko Sakkinen ret = spi_sync_locked(phy->spi_device, &m);
194faaca0a0SJarkko Sakkinen if (ret < 0)
195faaca0a0SJarkko Sakkinen goto exit;
196faaca0a0SJarkko Sakkinen
197faaca0a0SJarkko Sakkinen if (in) {
198faaca0a0SJarkko Sakkinen memcpy(in, phy->iobuf, transfer_len);
199faaca0a0SJarkko Sakkinen in += transfer_len;
200faaca0a0SJarkko Sakkinen }
201faaca0a0SJarkko Sakkinen
202faaca0a0SJarkko Sakkinen len -= transfer_len;
203faaca0a0SJarkko Sakkinen }
204faaca0a0SJarkko Sakkinen
205faaca0a0SJarkko Sakkinen exit:
206f0afba40SPeijie Shao if (ret < 0) {
207f0afba40SPeijie Shao /* Deactivate chip select */
208f0afba40SPeijie Shao memset(&spi_xfer, 0, sizeof(spi_xfer));
209f0afba40SPeijie Shao spi_message_init(&m);
210f0afba40SPeijie Shao spi_message_add_tail(&spi_xfer, &m);
211f0afba40SPeijie Shao spi_sync_locked(phy->spi_device, &m);
212f0afba40SPeijie Shao }
213f0afba40SPeijie Shao
214faaca0a0SJarkko Sakkinen spi_bus_unlock(phy->spi_device->master);
215faaca0a0SJarkko Sakkinen return ret;
216faaca0a0SJarkko Sakkinen }
217faaca0a0SJarkko Sakkinen
tpm_tis_spi_transfer(struct tpm_tis_data * data,u32 addr,u16 len,u8 * in,const u8 * out)218a86a42acSKrishna Yarlagadda int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
219a86a42acSKrishna Yarlagadda u8 *in, const u8 *out)
220a86a42acSKrishna Yarlagadda {
221a86a42acSKrishna Yarlagadda struct tpm_tis_spi_phy *phy = to_tpm_tis_spi_phy(data);
222a86a42acSKrishna Yarlagadda struct spi_controller *ctlr = phy->spi_device->controller;
223a86a42acSKrishna Yarlagadda
224a86a42acSKrishna Yarlagadda /*
225a86a42acSKrishna Yarlagadda * TPM flow control over SPI requires full duplex support.
226a86a42acSKrishna Yarlagadda * Send entire message to a half duplex controller to handle
227a86a42acSKrishna Yarlagadda * wait polling in controller.
228a86a42acSKrishna Yarlagadda * Set TPM HW flow control flag..
229a86a42acSKrishna Yarlagadda */
230a86a42acSKrishna Yarlagadda if (ctlr->flags & SPI_CONTROLLER_HALF_DUPLEX)
231a86a42acSKrishna Yarlagadda return tpm_tis_spi_transfer_half(data, addr, len, in, out);
232a86a42acSKrishna Yarlagadda else
233a86a42acSKrishna Yarlagadda return tpm_tis_spi_transfer_full(data, addr, len, in, out);
234a86a42acSKrishna Yarlagadda }
235a86a42acSKrishna Yarlagadda
tpm_tis_spi_read_bytes(struct tpm_tis_data * data,u32 addr,u16 len,u8 * result,enum tpm_tis_io_mode io_mode)236faaca0a0SJarkko Sakkinen static int tpm_tis_spi_read_bytes(struct tpm_tis_data *data, u32 addr,
2376422cbd3SJohannes Holland u16 len, u8 *result, enum tpm_tis_io_mode io_mode)
238faaca0a0SJarkko Sakkinen {
239faaca0a0SJarkko Sakkinen return tpm_tis_spi_transfer(data, addr, len, result, NULL);
240faaca0a0SJarkko Sakkinen }
241faaca0a0SJarkko Sakkinen
tpm_tis_spi_write_bytes(struct tpm_tis_data * data,u32 addr,u16 len,const u8 * value,enum tpm_tis_io_mode io_mode)242faaca0a0SJarkko Sakkinen static int tpm_tis_spi_write_bytes(struct tpm_tis_data *data, u32 addr,
2436422cbd3SJohannes Holland u16 len, const u8 *value, enum tpm_tis_io_mode io_mode)
244faaca0a0SJarkko Sakkinen {
245faaca0a0SJarkko Sakkinen return tpm_tis_spi_transfer(data, addr, len, NULL, value);
246faaca0a0SJarkko Sakkinen }
247faaca0a0SJarkko Sakkinen
tpm_tis_spi_init(struct spi_device * spi,struct tpm_tis_spi_phy * phy,int irq,const struct tpm_tis_phy_ops * phy_ops)248faaca0a0SJarkko Sakkinen int tpm_tis_spi_init(struct spi_device *spi, struct tpm_tis_spi_phy *phy,
249faaca0a0SJarkko Sakkinen int irq, const struct tpm_tis_phy_ops *phy_ops)
250faaca0a0SJarkko Sakkinen {
25115471838SMatthew R. Ochs phy->iobuf = devm_kmalloc(&spi->dev, SPI_HDRSIZE + MAX_SPI_FRAMESIZE, GFP_KERNEL);
252faaca0a0SJarkko Sakkinen if (!phy->iobuf)
253faaca0a0SJarkko Sakkinen return -ENOMEM;
254faaca0a0SJarkko Sakkinen
255faaca0a0SJarkko Sakkinen phy->spi_device = spi;
256faaca0a0SJarkko Sakkinen
257faaca0a0SJarkko Sakkinen return tpm_tis_core_init(&spi->dev, &phy->priv, irq, phy_ops, NULL);
258faaca0a0SJarkko Sakkinen }
259faaca0a0SJarkko Sakkinen
260faaca0a0SJarkko Sakkinen static const struct tpm_tis_phy_ops tpm_spi_phy_ops = {
261faaca0a0SJarkko Sakkinen .read_bytes = tpm_tis_spi_read_bytes,
262faaca0a0SJarkko Sakkinen .write_bytes = tpm_tis_spi_write_bytes,
263faaca0a0SJarkko Sakkinen };
264faaca0a0SJarkko Sakkinen
tpm_tis_spi_probe(struct spi_device * dev)265faaca0a0SJarkko Sakkinen static int tpm_tis_spi_probe(struct spi_device *dev)
266faaca0a0SJarkko Sakkinen {
267faaca0a0SJarkko Sakkinen struct tpm_tis_spi_phy *phy;
268faaca0a0SJarkko Sakkinen int irq;
269faaca0a0SJarkko Sakkinen
270faaca0a0SJarkko Sakkinen phy = devm_kzalloc(&dev->dev, sizeof(struct tpm_tis_spi_phy),
271faaca0a0SJarkko Sakkinen GFP_KERNEL);
272faaca0a0SJarkko Sakkinen if (!phy)
273faaca0a0SJarkko Sakkinen return -ENOMEM;
274faaca0a0SJarkko Sakkinen
275faaca0a0SJarkko Sakkinen phy->flow_control = tpm_tis_spi_flow_control;
276faaca0a0SJarkko Sakkinen
277a86a42acSKrishna Yarlagadda if (dev->controller->flags & SPI_CONTROLLER_HALF_DUPLEX)
278a86a42acSKrishna Yarlagadda dev->mode |= SPI_TPM_HW_FLOW;
279a86a42acSKrishna Yarlagadda
280faaca0a0SJarkko Sakkinen /* If the SPI device has an IRQ then use that */
281faaca0a0SJarkko Sakkinen if (dev->irq > 0)
282faaca0a0SJarkko Sakkinen irq = dev->irq;
283faaca0a0SJarkko Sakkinen else
284faaca0a0SJarkko Sakkinen irq = -1;
285faaca0a0SJarkko Sakkinen
286faaca0a0SJarkko Sakkinen init_completion(&phy->ready);
287faaca0a0SJarkko Sakkinen return tpm_tis_spi_init(dev, phy, irq, &tpm_spi_phy_ops);
288faaca0a0SJarkko Sakkinen }
289faaca0a0SJarkko Sakkinen
290faaca0a0SJarkko Sakkinen typedef int (*tpm_tis_spi_probe_func)(struct spi_device *);
291faaca0a0SJarkko Sakkinen
tpm_tis_spi_driver_probe(struct spi_device * spi)292faaca0a0SJarkko Sakkinen static int tpm_tis_spi_driver_probe(struct spi_device *spi)
293faaca0a0SJarkko Sakkinen {
294faaca0a0SJarkko Sakkinen const struct spi_device_id *spi_dev_id = spi_get_device_id(spi);
295faaca0a0SJarkko Sakkinen tpm_tis_spi_probe_func probe_func;
296faaca0a0SJarkko Sakkinen
297faaca0a0SJarkko Sakkinen probe_func = of_device_get_match_data(&spi->dev);
298114e4337SLiguang Zhang if (!probe_func) {
299114e4337SLiguang Zhang if (spi_dev_id) {
300faaca0a0SJarkko Sakkinen probe_func = (tpm_tis_spi_probe_func)spi_dev_id->driver_data;
301faaca0a0SJarkko Sakkinen if (!probe_func)
302faaca0a0SJarkko Sakkinen return -ENODEV;
303114e4337SLiguang Zhang } else
304114e4337SLiguang Zhang probe_func = tpm_tis_spi_probe;
305114e4337SLiguang Zhang }
306faaca0a0SJarkko Sakkinen
307faaca0a0SJarkko Sakkinen return probe_func(spi);
308faaca0a0SJarkko Sakkinen }
309faaca0a0SJarkko Sakkinen
310faaca0a0SJarkko Sakkinen static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_spi_resume);
311faaca0a0SJarkko Sakkinen
tpm_tis_spi_remove(struct spi_device * dev)312a0386bbaSUwe Kleine-König static void tpm_tis_spi_remove(struct spi_device *dev)
313faaca0a0SJarkko Sakkinen {
314faaca0a0SJarkko Sakkinen struct tpm_chip *chip = spi_get_drvdata(dev);
315faaca0a0SJarkko Sakkinen
316faaca0a0SJarkko Sakkinen tpm_chip_unregister(chip);
317faaca0a0SJarkko Sakkinen tpm_tis_remove(chip);
318faaca0a0SJarkko Sakkinen }
319faaca0a0SJarkko Sakkinen
320faaca0a0SJarkko Sakkinen static const struct spi_device_id tpm_tis_spi_id[] = {
321c46ed228SJavier Martinez Canillas { "st33htpm-spi", (unsigned long)tpm_tis_spi_probe },
322c46ed228SJavier Martinez Canillas { "slb9670", (unsigned long)tpm_tis_spi_probe },
323faaca0a0SJarkko Sakkinen { "tpm_tis_spi", (unsigned long)tpm_tis_spi_probe },
3247eba41feSMark Brown { "tpm_tis-spi", (unsigned long)tpm_tis_spi_probe },
325faaca0a0SJarkko Sakkinen { "cr50", (unsigned long)cr50_spi_probe },
326faaca0a0SJarkko Sakkinen {}
327faaca0a0SJarkko Sakkinen };
328faaca0a0SJarkko Sakkinen MODULE_DEVICE_TABLE(spi, tpm_tis_spi_id);
329faaca0a0SJarkko Sakkinen
3303fb29a23SKrzysztof Kozlowski static const struct of_device_id of_tis_spi_match[] __maybe_unused = {
331faaca0a0SJarkko Sakkinen { .compatible = "st,st33htpm-spi", .data = tpm_tis_spi_probe },
332faaca0a0SJarkko Sakkinen { .compatible = "infineon,slb9670", .data = tpm_tis_spi_probe },
333faaca0a0SJarkko Sakkinen { .compatible = "tcg,tpm_tis-spi", .data = tpm_tis_spi_probe },
334faaca0a0SJarkko Sakkinen { .compatible = "google,cr50", .data = cr50_spi_probe },
335faaca0a0SJarkko Sakkinen {}
336faaca0a0SJarkko Sakkinen };
337faaca0a0SJarkko Sakkinen MODULE_DEVICE_TABLE(of, of_tis_spi_match);
338faaca0a0SJarkko Sakkinen
3393fb29a23SKrzysztof Kozlowski static const struct acpi_device_id acpi_tis_spi_match[] __maybe_unused = {
340faaca0a0SJarkko Sakkinen {"SMO0768", 0},
341faaca0a0SJarkko Sakkinen {}
342faaca0a0SJarkko Sakkinen };
343faaca0a0SJarkko Sakkinen MODULE_DEVICE_TABLE(acpi, acpi_tis_spi_match);
344faaca0a0SJarkko Sakkinen
345faaca0a0SJarkko Sakkinen static struct spi_driver tpm_tis_spi_driver = {
346faaca0a0SJarkko Sakkinen .driver = {
347faaca0a0SJarkko Sakkinen .name = "tpm_tis_spi",
348faaca0a0SJarkko Sakkinen .pm = &tpm_tis_pm,
349faaca0a0SJarkko Sakkinen .of_match_table = of_match_ptr(of_tis_spi_match),
350faaca0a0SJarkko Sakkinen .acpi_match_table = ACPI_PTR(acpi_tis_spi_match),
3517187bf7fSDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS,
352faaca0a0SJarkko Sakkinen },
353faaca0a0SJarkko Sakkinen .probe = tpm_tis_spi_driver_probe,
354faaca0a0SJarkko Sakkinen .remove = tpm_tis_spi_remove,
355faaca0a0SJarkko Sakkinen .id_table = tpm_tis_spi_id,
356faaca0a0SJarkko Sakkinen };
357faaca0a0SJarkko Sakkinen module_spi_driver(tpm_tis_spi_driver);
358faaca0a0SJarkko Sakkinen
359faaca0a0SJarkko Sakkinen MODULE_DESCRIPTION("TPM Driver for native SPI access");
360faaca0a0SJarkko Sakkinen MODULE_LICENSE("GPL");
361