![Linus Torvalds](/assets/img/avatar_default.png)
Here is the "big" char/misc driver patches for 3.8-rc1. I'm starting to put random driver subsystems that I had previously sent you through the driver-core tree in this tree, as it makes more sense to do so. Nothing major here, the various __dev* removals, some mei driver updates, and other random driver-specific things from the different maintainers and developers. Note, some MFD drivers got added through this tree, and they are also coming in through the "real" MFD tree as well, due to some major mis-communication between me and the different developers. If you have any merge conflicts, take the ones from the MFD tree, not these ones, sorry about that. All of this has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iEYEABECAAYFAlDHj7AACgkQMUfUDdst+ym7pQCgxhFDGQRJimG+Ddag+ghfLhQh Ql0AoJsWVFvQjb7q1NO7OvOABaxjEJdu =na5b -----END PGP SIGNATURE----- Merge tag 'char-misc-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull Char/Misc driver merge from Greg Kroah-Hartman: "Here is the "big" char/misc driver patches for 3.8-rc1. I'm starting to put random driver subsystems that I had previously sent you through the driver-core tree in this tree, as it makes more sense to do so. Nothing major here, the various __dev* removals, some mei driver updates, and other random driver-specific things from the different maintainers and developers. Note, some MFD drivers got added through this tree, and they are also coming in through the "real" MFD tree as well, due to some major mis-communication between me and the different developers. If you have any merge conflicts, take the ones from the MFD tree, not these ones, sorry about that. All of this has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" Fix up trivial conflict in drivers/mmc/host/Kconfig due to new drivers having been added (both at the end, as usual..) * tag 'char-misc-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (84 commits) MAINTAINERS: remove drivers/staging/hv/ misc/st_kim: Free resources in the error path of probe() drivers/char: for hpet, add count checking, and ~0UL instead of -1 w1-gpio: Simplify & get rid of defines w1-gpio: Pinctrl-fy extcon: remove use of __devexit_p extcon: remove use of __devinit extcon: remove use of __devexit drivers: uio: Only allocate new private data when probing device tree node drivers: uio_dmem_genirq: Allow partial success when opening device drivers: uio_dmem_genirq: Don't use DMA_ERROR_CODE to indicate unmapped regions drivers: uio_dmem_genirq: Don't mix address spaces for dynamic region vaddr uio: remove use of __devexit uio: remove use of __devinitdata uio: remove use of __devinit uio: remove use of __devexit_p char: remove use of __devexit char: remove use of __devinitconst char: remove use of __devinitdata char: remove use of __devinit ...
678 lines
17 KiB
C
678 lines
17 KiB
C
/*
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* Description:
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* Device Driver for the Infineon Technologies
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* SLD 9630 TT 1.1 and SLB 9635 TT 1.2 Trusted Platform Module
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* Specifications at www.trustedcomputinggroup.org
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*
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* Copyright (C) 2005, Marcel Selhorst <tpmdd@selhorst.net>
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* Sirrix AG - security technologies <tpmdd@sirrix.com> and
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* Applied Data Security Group, Ruhr-University Bochum, Germany
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* Project-Homepage: http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#include <linux/init.h>
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#include <linux/pnp.h>
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#include "tpm.h"
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/* Infineon specific definitions */
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/* maximum number of WTX-packages */
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#define TPM_MAX_WTX_PACKAGES 50
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/* msleep-Time for WTX-packages */
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#define TPM_WTX_MSLEEP_TIME 20
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/* msleep-Time --> Interval to check status register */
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#define TPM_MSLEEP_TIME 3
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/* gives number of max. msleep()-calls before throwing timeout */
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#define TPM_MAX_TRIES 5000
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#define TPM_INFINEON_DEV_VEN_VALUE 0x15D1
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#define TPM_INF_IO_PORT 0x0
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#define TPM_INF_IO_MEM 0x1
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#define TPM_INF_ADDR 0x0
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#define TPM_INF_DATA 0x1
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struct tpm_inf_dev {
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int iotype;
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void __iomem *mem_base; /* MMIO ioremap'd addr */
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unsigned long map_base; /* phys MMIO base */
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unsigned long map_size; /* MMIO region size */
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unsigned int index_off; /* index register offset */
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unsigned int data_regs; /* Data registers */
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unsigned int data_size;
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unsigned int config_port; /* IO Port config index reg */
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unsigned int config_size;
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};
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static struct tpm_inf_dev tpm_dev;
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static inline void tpm_data_out(unsigned char data, unsigned char offset)
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{
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if (tpm_dev.iotype == TPM_INF_IO_PORT)
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outb(data, tpm_dev.data_regs + offset);
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else
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writeb(data, tpm_dev.mem_base + tpm_dev.data_regs + offset);
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}
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static inline unsigned char tpm_data_in(unsigned char offset)
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{
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if (tpm_dev.iotype == TPM_INF_IO_PORT)
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return inb(tpm_dev.data_regs + offset);
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else
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return readb(tpm_dev.mem_base + tpm_dev.data_regs + offset);
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}
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static inline void tpm_config_out(unsigned char data, unsigned char offset)
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{
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if (tpm_dev.iotype == TPM_INF_IO_PORT)
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outb(data, tpm_dev.config_port + offset);
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else
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writeb(data, tpm_dev.mem_base + tpm_dev.index_off + offset);
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}
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static inline unsigned char tpm_config_in(unsigned char offset)
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{
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if (tpm_dev.iotype == TPM_INF_IO_PORT)
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return inb(tpm_dev.config_port + offset);
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else
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return readb(tpm_dev.mem_base + tpm_dev.index_off + offset);
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}
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/* TPM header definitions */
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enum infineon_tpm_header {
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TPM_VL_VER = 0x01,
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TPM_VL_CHANNEL_CONTROL = 0x07,
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TPM_VL_CHANNEL_PERSONALISATION = 0x0A,
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TPM_VL_CHANNEL_TPM = 0x0B,
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TPM_VL_CONTROL = 0x00,
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TPM_INF_NAK = 0x15,
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TPM_CTRL_WTX = 0x10,
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TPM_CTRL_WTX_ABORT = 0x18,
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TPM_CTRL_WTX_ABORT_ACK = 0x18,
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TPM_CTRL_ERROR = 0x20,
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TPM_CTRL_CHAININGACK = 0x40,
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TPM_CTRL_CHAINING = 0x80,
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TPM_CTRL_DATA = 0x04,
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TPM_CTRL_DATA_CHA = 0x84,
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TPM_CTRL_DATA_CHA_ACK = 0xC4
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};
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enum infineon_tpm_register {
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WRFIFO = 0x00,
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RDFIFO = 0x01,
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STAT = 0x02,
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CMD = 0x03
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};
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enum infineon_tpm_command_bits {
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CMD_DIS = 0x00,
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CMD_LP = 0x01,
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CMD_RES = 0x02,
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CMD_IRQC = 0x06
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};
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enum infineon_tpm_status_bits {
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STAT_XFE = 0x00,
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STAT_LPA = 0x01,
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STAT_FOK = 0x02,
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STAT_TOK = 0x03,
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STAT_IRQA = 0x06,
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STAT_RDA = 0x07
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};
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/* some outgoing values */
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enum infineon_tpm_values {
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CHIP_ID1 = 0x20,
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CHIP_ID2 = 0x21,
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TPM_DAR = 0x30,
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RESET_LP_IRQC_DISABLE = 0x41,
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ENABLE_REGISTER_PAIR = 0x55,
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IOLIMH = 0x60,
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IOLIML = 0x61,
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DISABLE_REGISTER_PAIR = 0xAA,
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IDVENL = 0xF1,
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IDVENH = 0xF2,
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IDPDL = 0xF3,
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IDPDH = 0xF4
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};
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static int number_of_wtx;
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static int empty_fifo(struct tpm_chip *chip, int clear_wrfifo)
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{
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int status;
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int check = 0;
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int i;
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if (clear_wrfifo) {
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for (i = 0; i < 4096; i++) {
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status = tpm_data_in(WRFIFO);
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if (status == 0xff) {
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if (check == 5)
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break;
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else
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check++;
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}
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}
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}
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/* Note: The values which are currently in the FIFO of the TPM
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are thrown away since there is no usage for them. Usually,
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this has nothing to say, since the TPM will give its answer
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immediately or will be aborted anyway, so the data here is
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usually garbage and useless.
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We have to clean this, because the next communication with
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the TPM would be rubbish, if there is still some old data
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in the Read FIFO.
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*/
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i = 0;
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do {
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status = tpm_data_in(RDFIFO);
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status = tpm_data_in(STAT);
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i++;
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if (i == TPM_MAX_TRIES)
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return -EIO;
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} while ((status & (1 << STAT_RDA)) != 0);
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return 0;
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}
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static int wait(struct tpm_chip *chip, int wait_for_bit)
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{
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int status;
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int i;
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for (i = 0; i < TPM_MAX_TRIES; i++) {
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status = tpm_data_in(STAT);
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/* check the status-register if wait_for_bit is set */
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if (status & 1 << wait_for_bit)
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break;
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msleep(TPM_MSLEEP_TIME);
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}
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if (i == TPM_MAX_TRIES) { /* timeout occurs */
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if (wait_for_bit == STAT_XFE)
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dev_err(chip->dev, "Timeout in wait(STAT_XFE)\n");
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if (wait_for_bit == STAT_RDA)
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dev_err(chip->dev, "Timeout in wait(STAT_RDA)\n");
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return -EIO;
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}
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return 0;
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};
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static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
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{
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wait(chip, STAT_XFE);
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tpm_data_out(sendbyte, WRFIFO);
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}
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/* Note: WTX means Waiting-Time-Extension. Whenever the TPM needs more
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calculation time, it sends a WTX-package, which has to be acknowledged
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or aborted. This usually occurs if you are hammering the TPM with key
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creation. Set the maximum number of WTX-packages in the definitions
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above, if the number is reached, the waiting-time will be denied
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and the TPM command has to be resend.
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*/
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static void tpm_wtx(struct tpm_chip *chip)
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{
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number_of_wtx++;
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dev_info(chip->dev, "Granting WTX (%02d / %02d)\n",
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number_of_wtx, TPM_MAX_WTX_PACKAGES);
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wait_and_send(chip, TPM_VL_VER);
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wait_and_send(chip, TPM_CTRL_WTX);
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wait_and_send(chip, 0x00);
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wait_and_send(chip, 0x00);
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msleep(TPM_WTX_MSLEEP_TIME);
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}
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static void tpm_wtx_abort(struct tpm_chip *chip)
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{
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dev_info(chip->dev, "Aborting WTX\n");
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wait_and_send(chip, TPM_VL_VER);
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wait_and_send(chip, TPM_CTRL_WTX_ABORT);
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wait_and_send(chip, 0x00);
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wait_and_send(chip, 0x00);
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number_of_wtx = 0;
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msleep(TPM_WTX_MSLEEP_TIME);
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}
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static int tpm_inf_recv(struct tpm_chip *chip, u8 * buf, size_t count)
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{
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int i;
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int ret;
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u32 size = 0;
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number_of_wtx = 0;
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recv_begin:
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/* start receiving header */
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for (i = 0; i < 4; i++) {
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ret = wait(chip, STAT_RDA);
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if (ret)
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return -EIO;
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buf[i] = tpm_data_in(RDFIFO);
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}
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if (buf[0] != TPM_VL_VER) {
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dev_err(chip->dev,
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"Wrong transport protocol implementation!\n");
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return -EIO;
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}
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if (buf[1] == TPM_CTRL_DATA) {
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/* size of the data received */
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size = ((buf[2] << 8) | buf[3]);
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for (i = 0; i < size; i++) {
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wait(chip, STAT_RDA);
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buf[i] = tpm_data_in(RDFIFO);
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}
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if ((size == 0x6D00) && (buf[1] == 0x80)) {
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dev_err(chip->dev, "Error handling on vendor layer!\n");
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return -EIO;
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}
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for (i = 0; i < size; i++)
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buf[i] = buf[i + 6];
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size = size - 6;
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return size;
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}
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if (buf[1] == TPM_CTRL_WTX) {
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dev_info(chip->dev, "WTX-package received\n");
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if (number_of_wtx < TPM_MAX_WTX_PACKAGES) {
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tpm_wtx(chip);
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goto recv_begin;
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} else {
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tpm_wtx_abort(chip);
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goto recv_begin;
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}
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}
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if (buf[1] == TPM_CTRL_WTX_ABORT_ACK) {
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dev_info(chip->dev, "WTX-abort acknowledged\n");
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return size;
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}
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if (buf[1] == TPM_CTRL_ERROR) {
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dev_err(chip->dev, "ERROR-package received:\n");
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if (buf[4] == TPM_INF_NAK)
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dev_err(chip->dev,
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"-> Negative acknowledgement"
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" - retransmit command!\n");
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return -EIO;
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}
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return -EIO;
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}
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static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
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{
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int i;
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int ret;
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u8 count_high, count_low, count_4, count_3, count_2, count_1;
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/* Disabling Reset, LP and IRQC */
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tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
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ret = empty_fifo(chip, 1);
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if (ret) {
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dev_err(chip->dev, "Timeout while clearing FIFO\n");
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return -EIO;
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}
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ret = wait(chip, STAT_XFE);
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if (ret)
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return -EIO;
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count_4 = (count & 0xff000000) >> 24;
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count_3 = (count & 0x00ff0000) >> 16;
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count_2 = (count & 0x0000ff00) >> 8;
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count_1 = (count & 0x000000ff);
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count_high = ((count + 6) & 0xffffff00) >> 8;
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count_low = ((count + 6) & 0x000000ff);
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/* Sending Header */
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wait_and_send(chip, TPM_VL_VER);
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wait_and_send(chip, TPM_CTRL_DATA);
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wait_and_send(chip, count_high);
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wait_and_send(chip, count_low);
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/* Sending Data Header */
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wait_and_send(chip, TPM_VL_VER);
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wait_and_send(chip, TPM_VL_CHANNEL_TPM);
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wait_and_send(chip, count_4);
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wait_and_send(chip, count_3);
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wait_and_send(chip, count_2);
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wait_and_send(chip, count_1);
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/* Sending Data */
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for (i = 0; i < count; i++) {
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wait_and_send(chip, buf[i]);
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}
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return count;
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}
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static void tpm_inf_cancel(struct tpm_chip *chip)
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{
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/*
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Since we are using the legacy mode to communicate
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with the TPM, we have no cancel functions, but have
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a workaround for interrupting the TPM through WTX.
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*/
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}
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static u8 tpm_inf_status(struct tpm_chip *chip)
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{
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return tpm_data_in(STAT);
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}
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static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
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static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
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static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
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static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
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static struct attribute *inf_attrs[] = {
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&dev_attr_pubek.attr,
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&dev_attr_pcrs.attr,
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&dev_attr_caps.attr,
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&dev_attr_cancel.attr,
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NULL,
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};
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static struct attribute_group inf_attr_grp = {.attrs = inf_attrs };
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static const struct file_operations inf_ops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.open = tpm_open,
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.read = tpm_read,
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.write = tpm_write,
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.release = tpm_release,
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};
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static const struct tpm_vendor_specific tpm_inf = {
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.recv = tpm_inf_recv,
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.send = tpm_inf_send,
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.cancel = tpm_inf_cancel,
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.status = tpm_inf_status,
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.req_complete_mask = 0,
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.req_complete_val = 0,
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.attr_group = &inf_attr_grp,
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.miscdev = {.fops = &inf_ops,},
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};
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static const struct pnp_device_id tpm_inf_pnp_tbl[] = {
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/* Infineon TPMs */
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{"IFX0101", 0},
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{"IFX0102", 0},
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{"", 0}
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};
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MODULE_DEVICE_TABLE(pnp, tpm_inf_pnp_tbl);
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static int tpm_inf_pnp_probe(struct pnp_dev *dev,
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const struct pnp_device_id *dev_id)
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{
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int rc = 0;
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u8 iol, ioh;
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int vendorid[2];
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int version[2];
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int productid[2];
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char chipname[20];
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struct tpm_chip *chip;
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/* read IO-ports through PnP */
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if (pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
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!(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
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tpm_dev.iotype = TPM_INF_IO_PORT;
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tpm_dev.config_port = pnp_port_start(dev, 0);
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tpm_dev.config_size = pnp_port_len(dev, 0);
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tpm_dev.data_regs = pnp_port_start(dev, 1);
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tpm_dev.data_size = pnp_port_len(dev, 1);
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if ((tpm_dev.data_size < 4) || (tpm_dev.config_size < 2)) {
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rc = -EINVAL;
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goto err_last;
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}
|
|
dev_info(&dev->dev, "Found %s with ID %s\n",
|
|
dev->name, dev_id->id);
|
|
if (!((tpm_dev.data_regs >> 8) & 0xff)) {
|
|
rc = -EINVAL;
|
|
goto err_last;
|
|
}
|
|
/* publish my base address and request region */
|
|
if (request_region(tpm_dev.data_regs, tpm_dev.data_size,
|
|
"tpm_infineon0") == NULL) {
|
|
rc = -EINVAL;
|
|
goto err_last;
|
|
}
|
|
if (request_region(tpm_dev.config_port, tpm_dev.config_size,
|
|
"tpm_infineon0") == NULL) {
|
|
release_region(tpm_dev.data_regs, tpm_dev.data_size);
|
|
rc = -EINVAL;
|
|
goto err_last;
|
|
}
|
|
} else if (pnp_mem_valid(dev, 0) &&
|
|
!(pnp_mem_flags(dev, 0) & IORESOURCE_DISABLED)) {
|
|
|
|
tpm_dev.iotype = TPM_INF_IO_MEM;
|
|
|
|
tpm_dev.map_base = pnp_mem_start(dev, 0);
|
|
tpm_dev.map_size = pnp_mem_len(dev, 0);
|
|
|
|
dev_info(&dev->dev, "Found %s with ID %s\n",
|
|
dev->name, dev_id->id);
|
|
|
|
/* publish my base address and request region */
|
|
if (request_mem_region(tpm_dev.map_base, tpm_dev.map_size,
|
|
"tpm_infineon0") == NULL) {
|
|
rc = -EINVAL;
|
|
goto err_last;
|
|
}
|
|
|
|
tpm_dev.mem_base = ioremap(tpm_dev.map_base, tpm_dev.map_size);
|
|
if (tpm_dev.mem_base == NULL) {
|
|
release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
|
|
rc = -EINVAL;
|
|
goto err_last;
|
|
}
|
|
|
|
/*
|
|
* The only known MMIO based Infineon TPM system provides
|
|
* a single large mem region with the device config
|
|
* registers at the default TPM_ADDR. The data registers
|
|
* seem like they could be placed anywhere within the MMIO
|
|
* region, but lets just put them at zero offset.
|
|
*/
|
|
tpm_dev.index_off = TPM_ADDR;
|
|
tpm_dev.data_regs = 0x0;
|
|
} else {
|
|
rc = -EINVAL;
|
|
goto err_last;
|
|
}
|
|
|
|
/* query chip for its vendor, its version number a.s.o. */
|
|
tpm_config_out(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
|
|
tpm_config_out(IDVENL, TPM_INF_ADDR);
|
|
vendorid[1] = tpm_config_in(TPM_INF_DATA);
|
|
tpm_config_out(IDVENH, TPM_INF_ADDR);
|
|
vendorid[0] = tpm_config_in(TPM_INF_DATA);
|
|
tpm_config_out(IDPDL, TPM_INF_ADDR);
|
|
productid[1] = tpm_config_in(TPM_INF_DATA);
|
|
tpm_config_out(IDPDH, TPM_INF_ADDR);
|
|
productid[0] = tpm_config_in(TPM_INF_DATA);
|
|
tpm_config_out(CHIP_ID1, TPM_INF_ADDR);
|
|
version[1] = tpm_config_in(TPM_INF_DATA);
|
|
tpm_config_out(CHIP_ID2, TPM_INF_ADDR);
|
|
version[0] = tpm_config_in(TPM_INF_DATA);
|
|
|
|
switch ((productid[0] << 8) | productid[1]) {
|
|
case 6:
|
|
snprintf(chipname, sizeof(chipname), " (SLD 9630 TT 1.1)");
|
|
break;
|
|
case 11:
|
|
snprintf(chipname, sizeof(chipname), " (SLB 9635 TT 1.2)");
|
|
break;
|
|
default:
|
|
snprintf(chipname, sizeof(chipname), " (unknown chip)");
|
|
break;
|
|
}
|
|
|
|
if ((vendorid[0] << 8 | vendorid[1]) == (TPM_INFINEON_DEV_VEN_VALUE)) {
|
|
|
|
/* configure TPM with IO-ports */
|
|
tpm_config_out(IOLIMH, TPM_INF_ADDR);
|
|
tpm_config_out((tpm_dev.data_regs >> 8) & 0xff, TPM_INF_DATA);
|
|
tpm_config_out(IOLIML, TPM_INF_ADDR);
|
|
tpm_config_out((tpm_dev.data_regs & 0xff), TPM_INF_DATA);
|
|
|
|
/* control if IO-ports are set correctly */
|
|
tpm_config_out(IOLIMH, TPM_INF_ADDR);
|
|
ioh = tpm_config_in(TPM_INF_DATA);
|
|
tpm_config_out(IOLIML, TPM_INF_ADDR);
|
|
iol = tpm_config_in(TPM_INF_DATA);
|
|
|
|
if ((ioh << 8 | iol) != tpm_dev.data_regs) {
|
|
dev_err(&dev->dev,
|
|
"Could not set IO-data registers to 0x%x\n",
|
|
tpm_dev.data_regs);
|
|
rc = -EIO;
|
|
goto err_release_region;
|
|
}
|
|
|
|
/* activate register */
|
|
tpm_config_out(TPM_DAR, TPM_INF_ADDR);
|
|
tpm_config_out(0x01, TPM_INF_DATA);
|
|
tpm_config_out(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
|
|
|
|
/* disable RESET, LP and IRQC */
|
|
tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
|
|
|
|
/* Finally, we're done, print some infos */
|
|
dev_info(&dev->dev, "TPM found: "
|
|
"config base 0x%lx, "
|
|
"data base 0x%lx, "
|
|
"chip version 0x%02x%02x, "
|
|
"vendor id 0x%x%x (Infineon), "
|
|
"product id 0x%02x%02x"
|
|
"%s\n",
|
|
tpm_dev.iotype == TPM_INF_IO_PORT ?
|
|
tpm_dev.config_port :
|
|
tpm_dev.map_base + tpm_dev.index_off,
|
|
tpm_dev.iotype == TPM_INF_IO_PORT ?
|
|
tpm_dev.data_regs :
|
|
tpm_dev.map_base + tpm_dev.data_regs,
|
|
version[0], version[1],
|
|
vendorid[0], vendorid[1],
|
|
productid[0], productid[1], chipname);
|
|
|
|
if (!(chip = tpm_register_hardware(&dev->dev, &tpm_inf)))
|
|
goto err_release_region;
|
|
|
|
return 0;
|
|
} else {
|
|
rc = -ENODEV;
|
|
goto err_release_region;
|
|
}
|
|
|
|
err_release_region:
|
|
if (tpm_dev.iotype == TPM_INF_IO_PORT) {
|
|
release_region(tpm_dev.data_regs, tpm_dev.data_size);
|
|
release_region(tpm_dev.config_port, tpm_dev.config_size);
|
|
} else {
|
|
iounmap(tpm_dev.mem_base);
|
|
release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
|
|
}
|
|
|
|
err_last:
|
|
return rc;
|
|
}
|
|
|
|
static void tpm_inf_pnp_remove(struct pnp_dev *dev)
|
|
{
|
|
struct tpm_chip *chip = pnp_get_drvdata(dev);
|
|
|
|
if (chip) {
|
|
if (tpm_dev.iotype == TPM_INF_IO_PORT) {
|
|
release_region(tpm_dev.data_regs, tpm_dev.data_size);
|
|
release_region(tpm_dev.config_port,
|
|
tpm_dev.config_size);
|
|
} else {
|
|
iounmap(tpm_dev.mem_base);
|
|
release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
|
|
}
|
|
tpm_dev_vendor_release(chip);
|
|
tpm_remove_hardware(chip->dev);
|
|
}
|
|
}
|
|
|
|
static int tpm_inf_pnp_suspend(struct pnp_dev *dev, pm_message_t pm_state)
|
|
{
|
|
struct tpm_chip *chip = pnp_get_drvdata(dev);
|
|
int rc;
|
|
if (chip) {
|
|
u8 savestate[] = {
|
|
0, 193, /* TPM_TAG_RQU_COMMAND */
|
|
0, 0, 0, 10, /* blob length (in bytes) */
|
|
0, 0, 0, 152 /* TPM_ORD_SaveState */
|
|
};
|
|
dev_info(&dev->dev, "saving TPM state\n");
|
|
rc = tpm_inf_send(chip, savestate, sizeof(savestate));
|
|
if (rc < 0) {
|
|
dev_err(&dev->dev, "error while saving TPM state\n");
|
|
return rc;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tpm_inf_pnp_resume(struct pnp_dev *dev)
|
|
{
|
|
/* Re-configure TPM after suspending */
|
|
tpm_config_out(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
|
|
tpm_config_out(IOLIMH, TPM_INF_ADDR);
|
|
tpm_config_out((tpm_dev.data_regs >> 8) & 0xff, TPM_INF_DATA);
|
|
tpm_config_out(IOLIML, TPM_INF_ADDR);
|
|
tpm_config_out((tpm_dev.data_regs & 0xff), TPM_INF_DATA);
|
|
/* activate register */
|
|
tpm_config_out(TPM_DAR, TPM_INF_ADDR);
|
|
tpm_config_out(0x01, TPM_INF_DATA);
|
|
tpm_config_out(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
|
|
/* disable RESET, LP and IRQC */
|
|
tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
|
|
return tpm_pm_resume(&dev->dev);
|
|
}
|
|
|
|
static struct pnp_driver tpm_inf_pnp_driver = {
|
|
.name = "tpm_inf_pnp",
|
|
.id_table = tpm_inf_pnp_tbl,
|
|
.probe = tpm_inf_pnp_probe,
|
|
.suspend = tpm_inf_pnp_suspend,
|
|
.resume = tpm_inf_pnp_resume,
|
|
.remove = tpm_inf_pnp_remove
|
|
};
|
|
|
|
static int __init init_inf(void)
|
|
{
|
|
return pnp_register_driver(&tpm_inf_pnp_driver);
|
|
}
|
|
|
|
static void __exit cleanup_inf(void)
|
|
{
|
|
pnp_unregister_driver(&tpm_inf_pnp_driver);
|
|
}
|
|
|
|
module_init(init_inf);
|
|
module_exit(cleanup_inf);
|
|
|
|
MODULE_AUTHOR("Marcel Selhorst <tpmdd@sirrix.com>");
|
|
MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
|
|
MODULE_VERSION("1.9.2");
|
|
MODULE_LICENSE("GPL");
|