diff options
| author | Ji-Ze Hong (Peter Hong) <hpeter@gmail.com> | 2016-10-04 11:28:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-27 17:28:16 +0300 |
| commit | 1e26c472c1a299c843f9762f74e8cd503cd977a2 (patch) | |
| tree | 1dbb7cd881e29434a21b5210f06e2258eb21c8fd /drivers/tty/serial | |
| parent | c2236facaec9e4bdd3b350a6a54d29440a234a04 (diff) | |
| download | linux-1e26c472c1a299c843f9762f74e8cd503cd977a2.tar.xz | |
serial: 8250_fintek: Add F81216 Support
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
Suggested-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250_fintek.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c index e039a33e59e3..523d873731be 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 probe_setup_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) { + case CHIP_ID_F81216AD: + case CHIP_ID_F81216H: + uart->port.rs485_config = fintek_8250_rs485_config; + break; + + default: /* No RS485 Auto direction functional */ + 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; } |