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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>
hifive-unleashed-5.1
Ji-Ze Hong (Peter Hong) 2016-10-04 16:28:02 +08:00 committed by Greg Kroah-Hartman
parent c2236facae
commit 1e26c472c1
1 changed files with 24 additions and 2 deletions
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26
drivers/tty/serial/8250/8250_fintek.c
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@ -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;
}