diff options
Diffstat (limited to 'drivers/serial/uartlite.c')
| -rw-r--r-- | drivers/serial/uartlite.c | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c index c00a627ef89e..ed13b9fac1af 100644 --- a/drivers/serial/uartlite.c +++ b/drivers/serial/uartlite.c @@ -23,9 +23,13 @@ #define ULITE_MINOR 187 #define ULITE_NR_UARTS 4 -/* For register details see datasheet: - http://www.xilinx.com/bvdocs/ipcenter/data_sheet/opb_uartlite.pdf -*/ +/* --------------------------------------------------------------------- + * Register definitions + * + * For register details see datasheet: + * http://www.xilinx.com/bvdocs/ipcenter/data_sheet/opb_uartlite.pdf + */ + #define ULITE_RX 0x00 #define ULITE_TX 0x04 #define ULITE_STATUS 0x08 @@ -49,6 +53,10 @@ static struct uart_port ulite_ports[ULITE_NR_UARTS]; +/* --------------------------------------------------------------------- + * Core UART driver operations + */ + static int ulite_receive(struct uart_port *port, int stat) { struct tty_struct *tty = port->info->tty; @@ -308,6 +316,10 @@ static struct uart_ops ulite_ops = { .verify_port = ulite_verify_port }; +/* --------------------------------------------------------------------- + * Console driver operations + */ + #ifdef CONFIG_SERIAL_UARTLITE_CONSOLE static void ulite_console_wait_tx(struct uart_port *port) { @@ -413,6 +425,19 @@ static struct uart_driver ulite_uart_driver = { #endif }; +/* --------------------------------------------------------------------- + * Port assignment functions (mapping devices to uart_port structures) + */ + +/** ulite_assign: register a uartlite device with the driver + * + * @dev: pointer to device structure + * @id: requested id number. Pass -1 for automatic port assignment + * @base: base address of uartlite registers + * @irq: irq number for uartlite + * + * Returns: 0 on success, <0 otherwise + */ static int __devinit ulite_assign(struct device *dev, int id, u32 base, int irq) { struct uart_port *port; @@ -465,6 +490,10 @@ static int __devinit ulite_assign(struct device *dev, int id, u32 base, int irq) return 0; } +/** ulite_release: register a uartlite device with the driver + * + * @dev: pointer to device structure + */ static int __devinit ulite_release(struct device *dev) { struct uart_port *port = dev_get_drvdata(dev); @@ -479,6 +508,10 @@ static int __devinit ulite_release(struct device *dev) return rc; } +/* --------------------------------------------------------------------- + * Platform bus binding + */ + static int __devinit ulite_probe(struct platform_device *pdev) { struct resource *res, *res2; @@ -508,6 +541,10 @@ static struct platform_driver ulite_platform_driver = { }, }; +/* --------------------------------------------------------------------- + * Module setup/teardown + */ + int __init ulite_init(void) { int ret; |