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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014, Linaro Limited
*/
#include <io.h>
#include <kernel/panic.h>
#include <mm/core_memprot.h>
#include <stdio.h>
#include <trace.h>
#include <tee/se/util.h>
#include <tee/se/reader/interface.h>
#include "pcsc.h"
#include "reader.h"
static void pcsc_reader_dump(struct pcsc_reader *r)
{
DMSG("[%s]:", r->se_reader.name);
if (r->state & PCSC_READER_STATE_IGNORE)
DMSG(" Ignore this reader");
if (r->state & PCSC_READER_STATE_UNKNOWN)
DMSG(" Reader unknown");
if (r->state & PCSC_READER_STATE_UNAVAILABLE)
DMSG(" Status unavailable");
if (r->state & PCSC_READER_STATE_EMPTY)
DMSG(" Card removed");
if (r->state & PCSC_READER_STATE_PRESENT)
DMSG(" Card inserted");
if (r->state & PCSC_READER_STATE_ATRMATCH)
DMSG(" ATR matches card");
if (r->state & PCSC_READER_STATE_EXCLUSIVE)
DMSG(" Exclusive Mode");
if (r->state & PCSC_READER_STATE_INUSE)
DMSG(" Shared Mode");
if (r->state & PCSC_READER_STATE_MUTE)
DMSG(" Unresponsive card");
if (r->state & PCSC_READER_STATE_UNPOWERED)
DMSG(" Reader Unpowered,");
if (r->state & PCSC_READER_STATE_PRESENT)
DMSG("Card Connected: [%s]",
r->connected ? "Yes" : "No");
if (r->connected) {
char dumpbuf[DUMP_BUF_MAX], *buf = dumpbuf;
size_t remain = DUMP_BUF_MAX;
buf = print_buf(buf, &remain, "ATR: ");
dump_hex(buf, &remain, r->atr, r->atr_len);
DMSG("%s", buf);
}
}
static uint32_t pcsc_reader_read_reg(struct pcsc_reader *r, uint32_t offset)
{
return read32(r->mmio_base + offset);
}
static void pcsc_reader_write_reg(struct pcsc_reader *r, uint32_t offset,
uint32_t value)
{
write32(value, r->mmio_base + offset);
}
static void pcsc_reader_get_atr(struct pcsc_reader *r)
{
uint32_t atr_paddr = 0;
uint32_t atr_len = pcsc_reader_read_reg(r, PCSC_REG_READER_ATR_LEN);
atr_paddr = virt_to_phys((void *)r->atr);
pcsc_reader_write_reg(r, PCSC_REG_READER_RX_ADDR,
atr_paddr);
pcsc_reader_write_reg(r, PCSC_REG_READER_RX_SIZE,
atr_len);
pcsc_reader_write_reg(r, PCSC_REG_READER_CONTROL,
PCSC_READER_CTL_READ_ATR);
r->atr_len = atr_len;
}
static void pcsc_reader_connect(struct pcsc_reader *r)
{
if (r->connected)
panic();
pcsc_reader_write_reg(r, PCSC_REG_READER_CONTROL,
PCSC_READER_CTL_CONNECT |
PCSC_READER_CTL_PROTOCOL_T1 |
PCSC_READER_CTL_SHARE_SHARED);
r->connected = true;
pcsc_reader_get_atr(r);
}
static void pcsc_reader_disconnect(struct pcsc_reader *r)
{
if (!r->connected)
panic();
pcsc_reader_write_reg(r, PCSC_REG_READER_CONTROL,
PCSC_READER_CTL_DISCONNECT |
PCSC_READER_CTL_DISPOSITION_RESET_CARD);
r->connected = false;
r->atr_len = 0;
}
static TEE_Result pcsc_reader_transmit(struct pcsc_reader *r, uint8_t *tx_buf,
size_t tx_len, uint8_t *rx_buf, size_t *rx_len)
{
uint32_t tx_buf_paddr = 0, rx_buf_paddr = 0;
if (!r->connected)
panic();
tx_buf_paddr = virt_to_phys((void *)tx_buf);
rx_buf_paddr = virt_to_phys((void *)rx_buf);
pcsc_reader_write_reg(r, PCSC_REG_READER_TX_ADDR,
tx_buf_paddr);
pcsc_reader_write_reg(r, PCSC_REG_READER_TX_SIZE,
tx_len);
pcsc_reader_write_reg(r, PCSC_REG_READER_RX_ADDR,
rx_buf_paddr);
pcsc_reader_write_reg(r, PCSC_REG_READER_RX_SIZE,
*rx_len);
pcsc_reader_write_reg(r, PCSC_REG_READER_CONTROL,
PCSC_READER_CTL_TRANSMIT);
*rx_len = pcsc_reader_read_reg(r, PCSC_REG_READER_RX_SIZE);
return TEE_SUCCESS;
}
static TEE_Result pcsc_passthru_reader_open(struct tee_se_reader *se_reader)
{
struct pcsc_reader *r = se_reader->private_data;
if (!se_reader->prop.sePresent) {
EMSG("SE is not present");
return TEE_ERROR_COMMUNICATION;
}
pcsc_reader_connect(r);
pcsc_reader_dump(r);
return TEE_SUCCESS;
}
static void pcsc_passthru_reader_close(struct tee_se_reader *se_reader)
{
struct pcsc_reader *r = se_reader->private_data;
pcsc_reader_disconnect(r);
pcsc_reader_dump(r);
}
static TEE_Result pcsc_passthru_reader_transmit(struct tee_se_reader *se_reader,
uint8_t *tx_buf, size_t tx_len, uint8_t *rx_buf, size_t *rx_len)
{
struct pcsc_reader *r = se_reader->private_data;
return pcsc_reader_transmit(r, tx_buf, tx_len, rx_buf, rx_len);
}
static enum tee_se_reader_state pcsc_passthru_reader_get_state(
struct tee_se_reader *se_reader)
{
struct pcsc_reader *r = se_reader->private_data;
if (r->state & PCSC_READER_STATE_PRESENT)
return READER_STATE_SE_INSERTED;
else
return READER_STATE_SE_EJECTED;
}
static TEE_Result pcsc_passthru_reader_get_atr(
struct tee_se_reader *se_reader, uint8_t **atr,
size_t *atr_len)
{
struct pcsc_reader *r = se_reader->private_data;
if (r->atr_len > 0) {
*atr = r->atr;
*atr_len = r->atr_len;
return TEE_SUCCESS;
} else
return TEE_ERROR_COMMUNICATION;
}
static struct tee_se_reader_ops pcsc_passthru_reader_ops = {
.open = pcsc_passthru_reader_open,
.close = pcsc_passthru_reader_close,
.get_state = pcsc_passthru_reader_get_state,
.get_atr = pcsc_passthru_reader_get_atr,
.transmit = pcsc_passthru_reader_transmit,
};
void init_reader(struct pcsc_reader *r, uint8_t index, uint32_t mmio_base)
{
r->index = index;
r->mmio_base = mmio_base;
r->atr_len = 0;
r->state = pcsc_reader_read_reg(r, PCSC_REG_READER_STATE);
snprintf(r->se_reader.name, TEE_SE_READER_NAME_MAX,
"tee_reader_pcsc#%d", index);
r->se_reader.ops = &pcsc_passthru_reader_ops;
r->se_reader.prop.teeOnly = true;
r->se_reader.prop.selectResponseEnable = true;
if (r->state & PCSC_READER_STATE_PRESENT)
r->se_reader.prop.sePresent = true;
else
r->se_reader.prop.sePresent = false;
r->se_reader.private_data = r;
}
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