[PATCH 5/7] serial: 8250_fintek: Add F81216 Support
From: Ji-Ze Hong (Peter Hong) <hidden>
Date: 2016-09-01 03:41:34
Also in:
lkml
Subsystem:
8250/16?50 (and clone uarts) serial driver, the rest, tty layer and serial drivers · Maintainers:
Greg Kroah-Hartman, Linus Torvalds, Jiri Slaby
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) <redacted> --- 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