Fintek F81216 is a LPC to 4 UARTs device. It's the F81216 series but
support less functional than F81216AD/F81216H
The following list is brief descriptions of F81216 series:
F81216H (0105)
9Bit/High baud rate(not implements with mainline)
RS485, 128Bytes FIFO (implemented)
F81216AD (0216)
9Bit(not implements with mainline)
RS485(implemented)
F81216 (0208)
basically 16550A
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_ker...@gmail.com>
---
drivers/tty/serial/8250/8250_fintek.c | 26 ++++++++++++++++++++++++--
1 file changed, 24 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_fintek.c
b/drivers/tty/serial/8250/8250_fintek.c
index 921f742..a62cfdd 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -23,6 +23,7 @@
#define CHIP_ID2 0x21
#define CHIP_ID_F81216AD 0x1602
#define CHIP_ID_F81216H 0x0501
+#define CHIP_ID_F81216 0x0802
#define VENDOR_ID1 0x23
#define VENDOR_ID1_VAL 0x19
#define VENDOR_ID2 0x24
@@ -107,8 +108,14 @@ static int fintek_8250_check_id(struct fintek_8250 *pdata)
chip = sio_read_reg(pdata, CHIP_ID1);
chip |= sio_read_reg(pdata, CHIP_ID2) << 8;
- if (chip != CHIP_ID_F81216AD && chip != CHIP_ID_F81216H)
+ switch (chip) {
+ case CHIP_ID_F81216AD:
+ case CHIP_ID_F81216H:
+ case CHIP_ID_F81216:
+ break;
+ default:
return -ENODEV;
+ }
pdata->pid = chip;
return 0;
@@ -235,6 +242,21 @@ static int find_base_port(struct fintek_8250 *pdata, u16
io_address,
return -ENODEV;
}
+static void fintek_8250_set_rs485_handler(struct uart_8250_port *uart)
+{
+ struct fintek_8250 *pdata = uart->port.private_data;
+
+ switch (pdata->pid) {
+ default: /* No RS485 Auto direction functional */
+ break;
+
+ case CHIP_ID_F81216AD:
+ case CHIP_ID_F81216H:
+ uart->port.rs485_config = fintek_8250_rs485_config;
+ break;
+ }
+}
+
int fintek_8250_probe(struct uart_8250_port *uart)
{
struct fintek_8250 *pdata;
@@ -248,8 +270,8 @@ int fintek_8250_probe(struct uart_8250_port *uart)
return -ENOMEM;
memcpy(pdata, &probe_data, sizeof(probe_data));
- uart->port.rs485_config = fintek_8250_rs485_config;
uart->port.private_data = pdata;
+ fintek_8250_set_rs485_handler(uart);
return 0;
}
--
1.9.1
