diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_fintek.c | 87 |
1 files changed, 52 insertions, 35 deletions
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c index 76d739b..82b055b 100644 --- a/drivers/tty/serial/8250/8250_fintek.c +++ b/drivers/tty/serial/8250/8250_fintek.c @@ -17,8 +17,8 @@ #include <linux/serial_core.h> #include "8250.h" -#define ADDR_PORT 0x4E -#define DATA_PORT 0x4F +#define ADDR_PORT 0 +#define DATA_PORT 1 #define ENTRY_KEY 0x77 #define EXIT_KEY 0xAA #define CHIP_ID1 0x20 @@ -40,24 +40,27 @@ #define DRIVER_NAME "8250_fintek" struct fintek_8250 { + u16 base_port; u8 index; long line; }; -static int fintek_8250_enter_key(void){ +static int fintek_8250_enter_key(u16 base_port) +{ - if (!request_muxed_region(ADDR_PORT, 2, DRIVER_NAME)) + if (!request_muxed_region(base_port, 2, DRIVER_NAME)) return -EBUSY; - outb(ENTRY_KEY, ADDR_PORT); - outb(ENTRY_KEY, ADDR_PORT); + outb(ENTRY_KEY, base_port + ADDR_PORT); + outb(ENTRY_KEY, base_port + ADDR_PORT); return 0; } -static void fintek_8250_exit_key(void){ +static void fintek_8250_exit_key(u16 base_port) +{ - outb(EXIT_KEY, ADDR_PORT); - release_region(ADDR_PORT, 2); + outb(EXIT_KEY, base_port + ADDR_PORT); + release_region(base_port + ADDR_PORT, 2); } static int fintek_8250_get_index(resource_size_t base_addr) @@ -72,23 +75,23 @@ static int fintek_8250_get_index(resource_size_t base_addr) return -ENODEV; } -static int fintek_8250_check_id(void) +static int fintek_8250_check_id(u16 base_port) { - outb(CHIP_ID1, ADDR_PORT); - if (inb(DATA_PORT) != CHIP_ID1_VAL) + outb(CHIP_ID1, base_port + ADDR_PORT); + if (inb(base_port + DATA_PORT) != CHIP_ID1_VAL) return -ENODEV; - outb(CHIP_ID2, ADDR_PORT); - if (inb(DATA_PORT) != CHIP_ID2_VAL) + outb(CHIP_ID2, base_port + ADDR_PORT); + if (inb(base_port + DATA_PORT) != CHIP_ID2_VAL) return -ENODEV; - outb(VENDOR_ID1, ADDR_PORT); - if (inb(DATA_PORT) != VENDOR_ID1_VAL) + outb(VENDOR_ID1, base_port + ADDR_PORT); + if (inb(base_port + DATA_PORT) != VENDOR_ID1_VAL) return -ENODEV; - outb(VENDOR_ID2, ADDR_PORT); - if (inb(DATA_PORT) != VENDOR_ID2_VAL) + outb(VENDOR_ID2, base_port + ADDR_PORT); + if (inb(base_port + DATA_PORT) != VENDOR_ID2_VAL) return -ENODEV; return 0; @@ -130,45 +133,58 @@ static int fintek_8250_rs485_config(struct uart_port *port, if (rs485->flags & SER_RS485_RTS_ON_SEND) config |= RTS_INVERT; - if (fintek_8250_enter_key()) + if (fintek_8250_enter_key(pdata->base_port)) return -EBUSY; - outb(LDN, ADDR_PORT); - outb(pdata->index, DATA_PORT); - outb(RS485, ADDR_PORT); - outb(config, DATA_PORT); - fintek_8250_exit_key(); + outb(LDN, pdata->base_port + ADDR_PORT); + outb(pdata->index, pdata->base_port + DATA_PORT); + outb(RS485, pdata->base_port + ADDR_PORT); + outb(config, pdata->base_port + DATA_PORT); + fintek_8250_exit_key(pdata->base_port); port->rs485 = *rs485; return 0; } +static int fintek_8250_base_port(void) +{ + static const u16 addr[] = {0x4e, 0x2e}; + int i; + + for (i = 0; i < ARRAY_SIZE(addr); i++) { + int ret; + + if (fintek_8250_enter_key(addr[i])) + continue; + ret = fintek_8250_check_id(addr[i]); + fintek_8250_exit_key(addr[i]); + if (!ret) + return addr[i]; + } + + return -ENODEV; +} + static int fintek_8250_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) { struct uart_8250_port uart; struct fintek_8250 *pdata; - int ret; int index; + int base_port; if (!pnp_port_valid(dev, 0)) return -ENODEV; + base_port = fintek_8250_base_port(); + if (base_port < 0) + return -ENODEV; + index = fintek_8250_get_index(pnp_port_start(dev, 0)); if (index < 0) return -ENODEV; - /* Enable configuration registers*/ - if (fintek_8250_enter_key()) - return -EBUSY; - - /*Check ID*/ - ret = fintek_8250_check_id(); - fintek_8250_exit_key(); - if (ret) - return ret; - memset(&uart, 0, sizeof(uart)); pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL); @@ -189,6 +205,7 @@ fintek_8250_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) uart.port.uartclk = 1843200; uart.port.dev = &dev->dev; + pdata->base_port = base_port; pdata->index = index; pdata->line = serial8250_register_8250_port(&uart); if (pdata->line < 0) |
