diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_fintek.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_fintek.c | 172 |
1 files changed, 107 insertions, 65 deletions
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c index 5815e81b5fc6..89474399ab89 100644 --- a/drivers/tty/serial/8250/8250_fintek.c +++ b/drivers/tty/serial/8250/8250_fintek.c @@ -17,18 +17,19 @@ #include <linux/serial_core.h> #include "8250.h" -#define ADDR_PORT 0x4E -#define DATA_PORT 0x4F -#define ENTRY_KEY 0x77 +#define ADDR_PORT 0 +#define DATA_PORT 1 #define EXIT_KEY 0xAA #define CHIP_ID1 0x20 -#define CHIP_ID1_VAL 0x02 #define CHIP_ID2 0x21 -#define CHIP_ID2_VAL 0x16 +#define CHIP_ID_0 0x1602 +#define CHIP_ID_1 0x0501 #define VENDOR_ID1 0x23 #define VENDOR_ID1_VAL 0x19 #define VENDOR_ID2 0x24 #define VENDOR_ID2_VAL 0x34 +#define IO_ADDR1 0x61 +#define IO_ADDR2 0x60 #define LDN 0x7 #define RS485 0xF0 @@ -39,51 +40,49 @@ #define DRIVER_NAME "8250_fintek" -static int fintek_8250_enter_key(void){ +struct fintek_8250 { + u16 base_port; + u8 index; + u8 key; + long line; +}; + +static int fintek_8250_enter_key(u16 base_port, u8 key) +{ - 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(key, base_port + ADDR_PORT); + outb(key, base_port + ADDR_PORT); return 0; } -static void fintek_8250_exit_key(void){ - - outb(EXIT_KEY, ADDR_PORT); - release_region(ADDR_PORT, 2); -} - -static int fintek_8250_get_index(resource_size_t base_addr) +static void fintek_8250_exit_key(u16 base_port) { - resource_size_t base[] = {0x3f8, 0x2f8, 0x3e8, 0x2e8}; - int i; - - for (i = 0; i < ARRAY_SIZE(base); i++) - if (base_addr == base[i]) - return i; - return -ENODEV; + outb(EXIT_KEY, base_port + ADDR_PORT); + release_region(base_port + ADDR_PORT, 2); } -static int fintek_8250_check_id(void) +static int fintek_8250_check_id(u16 base_port) { + u16 chip; - outb(CHIP_ID1, ADDR_PORT); - if (inb(DATA_PORT) != CHIP_ID1_VAL) + outb(VENDOR_ID1, base_port + ADDR_PORT); + if (inb(base_port + DATA_PORT) != VENDOR_ID1_VAL) return -ENODEV; - outb(CHIP_ID2, ADDR_PORT); - if (inb(DATA_PORT) != CHIP_ID2_VAL) + outb(VENDOR_ID2, base_port + ADDR_PORT); + if (inb(base_port + DATA_PORT) != VENDOR_ID2_VAL) return -ENODEV; - outb(VENDOR_ID1, ADDR_PORT); - if (inb(DATA_PORT) != VENDOR_ID1_VAL) - return -ENODEV; + outb(CHIP_ID1, base_port + ADDR_PORT); + chip = inb(base_port + DATA_PORT); + outb(CHIP_ID2, base_port + ADDR_PORT); + chip |= inb(base_port + DATA_PORT) << 8; - outb(VENDOR_ID2, ADDR_PORT); - if (inb(DATA_PORT) != VENDOR_ID2_VAL) + if (chip != CHIP_ID_0 && chip != CHIP_ID_1) return -ENODEV; return 0; @@ -93,9 +92,9 @@ static int fintek_8250_rs485_config(struct uart_port *port, struct serial_rs485 *rs485) { uint8_t config = 0; - int index = fintek_8250_get_index(port->iobase); + struct fintek_8250 *pdata = port->private_data; - if (index < 0) + if (!pdata) return -EINVAL; if (rs485->flags & SER_RS485_ENABLED) @@ -125,44 +124,84 @@ 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, pdata->key)) return -EBUSY; - outb(LDN, ADDR_PORT); - outb(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(u16 io_address, u8 *key, u8 *index) +{ + static const u16 addr[] = {0x4e, 0x2e}; + static const u8 keys[] = {0x77, 0xa0, 0x87, 0x67}; + int i, j, k; + + for (i = 0; i < ARRAY_SIZE(addr); i++) { + for (j = 0; j < ARRAY_SIZE(keys); j++) { + + if (fintek_8250_enter_key(addr[i], keys[j])) + continue; + if (fintek_8250_check_id(addr[i])) { + fintek_8250_exit_key(addr[i]); + continue; + } + + for (k = 0; k < 4; k++) { + u16 aux; + + outb(LDN, addr[i] + ADDR_PORT); + outb(k, addr[i] + DATA_PORT); + + outb(IO_ADDR1, addr[i] + ADDR_PORT); + aux = inb(addr[i] + DATA_PORT); + outb(IO_ADDR2, addr[i] + ADDR_PORT); + aux |= inb(addr[i] + DATA_PORT) << 8; + if (aux != io_address) + continue; + + fintek_8250_exit_key(addr[i]); + *key = keys[j]; + *index = k; + return addr[i]; + } + fintek_8250_exit_key(addr[i]); + } + } + + return -ENODEV; +} + static int fintek_8250_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) { - int line; struct uart_8250_port uart; - int ret; + struct fintek_8250 *pdata; + int base_port; + u8 key; + u8 index; if (!pnp_port_valid(dev, 0)) return -ENODEV; - if (fintek_8250_get_index(pnp_port_start(dev, 0)) < 0) + base_port = fintek_8250_base_port(pnp_port_start(dev, 0), &key, &index); + if (base_port < 0) return -ENODEV; - /* Enable configuration registers*/ - if (fintek_8250_enter_key()) - return -EBUSY; + memset(&uart, 0, sizeof(uart)); - /*Check ID*/ - ret = fintek_8250_check_id(); - fintek_8250_exit_key(); - if (ret) - return ret; + pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + uart.port.private_data = pdata; - memset(&uart, 0, sizeof(uart)); if (!pnp_irq_valid(dev, 0)) return -ENODEV; uart.port.irq = pnp_irq(dev, 0); @@ -176,40 +215,43 @@ fintek_8250_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) uart.port.uartclk = 1843200; uart.port.dev = &dev->dev; - line = serial8250_register_8250_port(&uart); - if (line < 0) + pdata->key = key; + pdata->base_port = base_port; + pdata->index = index; + pdata->line = serial8250_register_8250_port(&uart); + if (pdata->line < 0) return -ENODEV; - pnp_set_drvdata(dev, (void *)((long)line + 1)); + pnp_set_drvdata(dev, pdata); return 0; } static void fintek_8250_remove(struct pnp_dev *dev) { - long line = (long)pnp_get_drvdata(dev); + struct fintek_8250 *pdata = pnp_get_drvdata(dev); - if (line) - serial8250_unregister_port(line - 1); + if (pdata) + serial8250_unregister_port(pdata->line); } #ifdef CONFIG_PM static int fintek_8250_suspend(struct pnp_dev *dev, pm_message_t state) { - long line = (long)pnp_get_drvdata(dev); + struct fintek_8250 *pdata = pnp_get_drvdata(dev); - if (!line) + if (!pdata) return -ENODEV; - serial8250_suspend_port(line - 1); + serial8250_suspend_port(pdata->line); return 0; } static int fintek_8250_resume(struct pnp_dev *dev) { - long line = (long)pnp_get_drvdata(dev); + struct fintek_8250 *pdata = pnp_get_drvdata(dev); - if (!line) + if (!pdata) return -ENODEV; - serial8250_resume_port(line - 1); + serial8250_resume_port(pdata->line); return 0; } #else |