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finish eeprom read/write implementations for RC632 

git-svn-id: https://svn.gnumonks.org/trunk/librfid@2084 e0336214-984f-0b4b-a45f-81c69e1f0ede
This commit is contained in:
laforge 2008-02-08 19:51:45 +00:00
parent 74b93b30bc
commit 292444f20b
1 changed files with 66 additions and 11 deletions
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77
src/rfid_asic_rc632.c
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@ -578,16 +578,69 @@ rc632_receive(struct rfid_asic_handle *handle,
/* FIXME: discard additional bytes in FIFO */
}
#define MAX_WRITE_LEN 16 /* see Sec. 18.6.1.2 of RC632 Spec Rev. 3.2. */
static int
rc632_read_eeprom(struct rfid_asic_handle *handle)
rc632_write_eeprom(struct rfid_asic_handle *handle, u_int16_t addr,
u_int8_t *data, u_int8_t len)
{
u_int8_t recvbuf[60];
u_int8_t sndbuf[3];
u_int8_t sndbuf[MAX_WRITE_LEN + 2];
u_int8_t reg;
int ret;
sndbuf[0] = 0x00;
sndbuf[1] = 0x00;
sndbuf[2] = 0x3c;
if (len > MAX_WRITE_LEN)
return -EINVAL;
if (addr < 0x10)
return -EPERM;
if (addr > 0x1ff)
return -EINVAL;
sndbuf[0] = addr & 0x00ff; /* LSB */
sndbuf[1] = addr >> 8; /* MSB */
memcpy(&sndbuf[2], data, len);
ret = rc632_fifo_write(handle, len + 2, sndbuf, 0x03);
if (ret < 0)
return ret;
ret = rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_WRITE_E2);
if (ret < 0)
return ret;
ret = rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &reg);
if (ret < 0)
return ret;
if (reg & RC632_ERR_FLAG_ACCESS_ERR)
return -EPERM;
while (1) {
u_int8_t reg;
ret = rc632_reg_read(handle, RC632_REG_SECONDARY_STATUS, &reg);
if (ret < 0)
return ret;
if (reg & RC632_SEC_ST_E2_READY) {
/* the E2Write command must be terminated, See sec. 18.6.1.3 */
ret = rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_IDLE);
break;
}
}
return ret;
}
static int
rc632_read_eeprom(struct rfid_asic_handle *handle, u_int16_t addr,
u_int8_t *buf, u_int8_t len)
{
u_int8_t sndbuf[3];
u_int8_t reg;
int ret;
sndbuf[0] = addr & 0xff;
sndbuf[1] = addr >> 8;
sndbuf[2] = len;
ret = rc632_fifo_write(handle, 3, sndbuf, 0x03);
if (ret < 0)
@ -597,14 +650,16 @@ rc632_read_eeprom(struct rfid_asic_handle *handle)
if (ret < 0)
return ret;
usleep(20000);
ret = rc632_fifo_read(handle, sizeof(recvbuf), recvbuf);
ret = rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &reg);
if (ret < 0)
return ret;
/* FIXME: do something with eeprom contents */
return ret;
if (reg & RC632_ERR_FLAG_ACCESS_ERR)
return -EPERM;
usleep(20000);
return rc632_fifo_read(handle, len, buf);
}
static int