summaryrefslogtreecommitdiffstats
path: root/drivers/nfc/pn544/i2c.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/nfc/pn544/i2c.c')
-rw-r--r--drivers/nfc/pn544/i2c.c194
1 files changed, 187 insertions, 7 deletions
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index d6185ff2f87..f2acd85be86 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -58,8 +58,19 @@ MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table);
#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
+/*
+ * Exposed through the 4 most significant bytes
+ * from the HCI SW_VERSION first byte, a.k.a.
+ * SW RomLib.
+ */
+#define PN544_HW_VARIANT_C2 0xa
+#define PN544_HW_VARIANT_C3 0xb
+
+#define PN544_FW_CMD_RESET 0x01
#define PN544_FW_CMD_WRITE 0x08
#define PN544_FW_CMD_CHECK 0x06
+#define PN544_FW_CMD_SECURE_WRITE 0x0C
+#define PN544_FW_CMD_SECURE_CHUNK_WRITE 0x0D
struct pn544_i2c_fw_frame_write {
u8 cmd;
@@ -88,13 +99,31 @@ struct pn544_i2c_fw_blob {
u8 data[];
};
+struct pn544_i2c_fw_secure_frame {
+ u8 cmd;
+ u16 be_datalen;
+ u8 data[];
+} __packed;
+
+struct pn544_i2c_fw_secure_blob {
+ u64 header;
+ u8 data[];
+};
+
#define PN544_FW_CMD_RESULT_TIMEOUT 0x01
#define PN544_FW_CMD_RESULT_BAD_CRC 0x02
#define PN544_FW_CMD_RESULT_ACCESS_DENIED 0x08
#define PN544_FW_CMD_RESULT_PROTOCOL_ERROR 0x0B
#define PN544_FW_CMD_RESULT_INVALID_PARAMETER 0x11
+#define PN544_FW_CMD_RESULT_UNSUPPORTED_COMMAND 0x13
#define PN544_FW_CMD_RESULT_INVALID_LENGTH 0x18
+#define PN544_FW_CMD_RESULT_CRYPTOGRAPHIC_ERROR 0x19
+#define PN544_FW_CMD_RESULT_VERSION_CONDITIONS_ERROR 0x1D
+#define PN544_FW_CMD_RESULT_MEMORY_ERROR 0x20
+#define PN544_FW_CMD_RESULT_CHUNK_OK 0x21
#define PN544_FW_CMD_RESULT_WRITE_FAILED 0x74
+#define PN544_FW_CMD_RESULT_COMMAND_REJECTED 0xE0
+#define PN544_FW_CMD_RESULT_CHUNK_ERROR 0xE6
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
@@ -104,11 +133,17 @@ struct pn544_i2c_fw_blob {
#define PN544_FW_I2C_WRITE_DATA_MAX_LEN MIN((PN544_FW_I2C_MAX_PAYLOAD -\
PN544_FW_I2C_WRITE_FRAME_HEADER_LEN),\
PN544_FW_WRITE_BUFFER_MAX_LEN)
+#define PN544_FW_SECURE_CHUNK_WRITE_HEADER_LEN 3
+#define PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN (PN544_FW_I2C_MAX_PAYLOAD -\
+ PN544_FW_SECURE_CHUNK_WRITE_HEADER_LEN)
+#define PN544_FW_SECURE_FRAME_HEADER_LEN 3
+#define PN544_FW_SECURE_BLOB_HEADER_LEN 8
#define FW_WORK_STATE_IDLE 1
#define FW_WORK_STATE_START 2
#define FW_WORK_STATE_WAIT_WRITE_ANSWER 3
#define FW_WORK_STATE_WAIT_CHECK_ANSWER 4
+#define FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER 5
struct pn544_i2c_phy {
struct i2c_client *i2c_dev;
@@ -119,6 +154,8 @@ struct pn544_i2c_phy {
unsigned int gpio_fw;
unsigned int en_polarity;
+ u8 hw_variant;
+
struct work_struct fw_work;
int fw_work_state;
char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
@@ -127,6 +164,8 @@ struct pn544_i2c_phy {
size_t fw_blob_size;
const u8 *fw_blob_data;
size_t fw_written;
+ size_t fw_size;
+
int fw_cmd_result;
int powered;
@@ -390,6 +429,8 @@ static int pn544_hci_i2c_fw_read_status(struct pn544_i2c_phy *phy)
switch (response.status) {
case 0:
return 0;
+ case PN544_FW_CMD_RESULT_CHUNK_OK:
+ return response.status;
case PN544_FW_CMD_RESULT_TIMEOUT:
return -ETIMEDOUT;
case PN544_FW_CMD_RESULT_BAD_CRC:
@@ -400,9 +441,20 @@ static int pn544_hci_i2c_fw_read_status(struct pn544_i2c_phy *phy)
return -EPROTO;
case PN544_FW_CMD_RESULT_INVALID_PARAMETER:
return -EINVAL;
+ case PN544_FW_CMD_RESULT_UNSUPPORTED_COMMAND:
+ return -ENOTSUPP;
case PN544_FW_CMD_RESULT_INVALID_LENGTH:
return -EBADMSG;
+ case PN544_FW_CMD_RESULT_CRYPTOGRAPHIC_ERROR:
+ return -ENOKEY;
+ case PN544_FW_CMD_RESULT_VERSION_CONDITIONS_ERROR:
+ return -EINVAL;
+ case PN544_FW_CMD_RESULT_MEMORY_ERROR:
+ return -ENOMEM;
+ case PN544_FW_CMD_RESULT_COMMAND_REJECTED:
+ return -EACCES;
case PN544_FW_CMD_RESULT_WRITE_FAILED:
+ case PN544_FW_CMD_RESULT_CHUNK_ERROR:
return -EIO;
default:
return -EIO;
@@ -469,7 +521,8 @@ static struct nfc_phy_ops i2c_phy_ops = {
.disable = pn544_hci_i2c_disable,
};
-static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name)
+static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name,
+ u8 hw_variant)
{
struct pn544_i2c_phy *phy = phy_id;
@@ -477,6 +530,7 @@ static int pn544_hci_i2c_fw_download(void *phy_id, const char *firmware_name)
strcpy(phy->firmware_name, firmware_name);
+ phy->hw_variant = hw_variant;
phy->fw_work_state = FW_WORK_STATE_START;
schedule_work(&phy->fw_work);
@@ -598,12 +652,93 @@ static int pn544_hci_i2c_fw_write_chunk(struct pn544_i2c_phy *phy)
return 0;
}
+static int pn544_hci_i2c_fw_secure_write_frame_cmd(struct pn544_i2c_phy *phy,
+ const u8 *data, u16 datalen)
+{
+ u8 buf[PN544_FW_I2C_MAX_PAYLOAD];
+ struct pn544_i2c_fw_secure_frame *chunk;
+ int chunklen;
+ int r;
+
+ if (datalen > PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN)
+ datalen = PN544_FW_SECURE_CHUNK_WRITE_DATA_MAX_LEN;
+
+ chunk = (struct pn544_i2c_fw_secure_frame *) buf;
+
+ chunk->cmd = PN544_FW_CMD_SECURE_CHUNK_WRITE;
+
+ put_unaligned_be16(datalen, &chunk->be_datalen);
+
+ memcpy(chunk->data, data, datalen);
+
+ chunklen = sizeof(chunk->cmd) + sizeof(chunk->be_datalen) + datalen;
+
+ r = i2c_master_send(phy->i2c_dev, buf, chunklen);
+
+ if (r == chunklen)
+ return datalen;
+ else if (r < 0)
+ return r;
+ else
+ return -EIO;
+
+}
+
+static int pn544_hci_i2c_fw_secure_write_frame(struct pn544_i2c_phy *phy)
+{
+ struct pn544_i2c_fw_secure_frame *framep;
+ int r;
+
+ framep = (struct pn544_i2c_fw_secure_frame *) phy->fw_blob_data;
+ if (phy->fw_written == 0)
+ phy->fw_blob_size = get_unaligned_be16(&framep->be_datalen)
+ + PN544_FW_SECURE_FRAME_HEADER_LEN;
+
+ /* Only secure write command can be chunked*/
+ if (phy->fw_blob_size > PN544_FW_I2C_MAX_PAYLOAD &&
+ framep->cmd != PN544_FW_CMD_SECURE_WRITE)
+ return -EINVAL;
+
+ /* The firmware also have other commands, we just send them directly */
+ if (phy->fw_blob_size < PN544_FW_I2C_MAX_PAYLOAD) {
+ r = i2c_master_send(phy->i2c_dev,
+ (const char *) phy->fw_blob_data, phy->fw_blob_size);
+
+ if (r == phy->fw_blob_size)
+ goto exit;
+ else if (r < 0)
+ return r;
+ else
+ return -EIO;
+ }
+
+ r = pn544_hci_i2c_fw_secure_write_frame_cmd(phy,
+ phy->fw_blob_data + phy->fw_written,
+ phy->fw_blob_size - phy->fw_written);
+ if (r < 0)
+ return r;
+
+exit:
+ phy->fw_written += r;
+ phy->fw_work_state = FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER;
+
+ /* SW reset command will not trig any response from PN544 */
+ if (framep->cmd == PN544_FW_CMD_RESET) {
+ pn544_hci_i2c_enable_mode(phy, PN544_FW_MODE);
+ phy->fw_cmd_result = 0;
+ schedule_work(&phy->fw_work);
+ }
+
+ return 0;
+}
+
static void pn544_hci_i2c_fw_work(struct work_struct *work)
{
struct pn544_i2c_phy *phy = container_of(work, struct pn544_i2c_phy,
fw_work);
int r;
struct pn544_i2c_fw_blob *blob;
+ struct pn544_i2c_fw_secure_blob *secure_blob;
switch (phy->fw_work_state) {
case FW_WORK_STATE_START:
@@ -614,13 +749,29 @@ static void pn544_hci_i2c_fw_work(struct work_struct *work)
if (r < 0)
goto exit_state_start;
- blob = (struct pn544_i2c_fw_blob *) phy->fw->data;
- phy->fw_blob_size = get_unaligned_be32(&blob->be_size);
- phy->fw_blob_dest_addr = get_unaligned_be32(&blob->be_destaddr);
- phy->fw_blob_data = blob->data;
-
phy->fw_written = 0;
- r = pn544_hci_i2c_fw_write_chunk(phy);
+
+ switch (phy->hw_variant) {
+ case PN544_HW_VARIANT_C2:
+ blob = (struct pn544_i2c_fw_blob *) phy->fw->data;
+ phy->fw_blob_size = get_unaligned_be32(&blob->be_size);
+ phy->fw_blob_dest_addr = get_unaligned_be32(
+ &blob->be_destaddr);
+ phy->fw_blob_data = blob->data;
+
+ r = pn544_hci_i2c_fw_write_chunk(phy);
+ break;
+ case PN544_HW_VARIANT_C3:
+ secure_blob = (struct pn544_i2c_fw_secure_blob *)
+ phy->fw->data;
+ phy->fw_blob_data = secure_blob->data;
+ phy->fw_size = phy->fw->size;
+ r = pn544_hci_i2c_fw_secure_write_frame(phy);
+ break;
+ default:
+ r = -ENOTSUPP;
+ break;
+ }
exit_state_start:
if (r < 0)
@@ -672,6 +823,35 @@ exit_state_wait_check_answer:
pn544_hci_i2c_fw_work_complete(phy, r);
break;
+ case FW_WORK_STATE_WAIT_SECURE_WRITE_ANSWER:
+ r = phy->fw_cmd_result;
+ if (r < 0)
+ goto exit_state_wait_secure_write_answer;
+
+ if (r == PN544_FW_CMD_RESULT_CHUNK_OK) {
+ r = pn544_hci_i2c_fw_secure_write_frame(phy);
+ goto exit_state_wait_secure_write_answer;
+ }
+
+ if (phy->fw_written == phy->fw_blob_size) {
+ secure_blob = (struct pn544_i2c_fw_secure_blob *)
+ (phy->fw_blob_data + phy->fw_blob_size);
+ phy->fw_size -= phy->fw_blob_size +
+ PN544_FW_SECURE_BLOB_HEADER_LEN;
+ if (phy->fw_size >= PN544_FW_SECURE_BLOB_HEADER_LEN
+ + PN544_FW_SECURE_FRAME_HEADER_LEN) {
+ phy->fw_blob_data = secure_blob->data;
+
+ phy->fw_written = 0;
+ r = pn544_hci_i2c_fw_secure_write_frame(phy);
+ }
+ }
+
+exit_state_wait_secure_write_answer:
+ if (r < 0 || phy->fw_size == 0)
+ pn544_hci_i2c_fw_work_complete(phy, r);
+ break;
+
default:
break;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 02:28:36 +0000