On Mon, Dec 13, 2021 at 03:10:07PM +0800, Hammer Hsieh wrote: > +/* Register offsets */ > +#define SUP_UART_DATA 0x00 > +#define SUP_UART_LSR 0x04 > +#define SUP_UART_MSR 0x08 > +#define SUP_UART_LCR 0x0C > +#define SUP_UART_MCR 0x10 > +#define SUP_UART_DIV_L 0x14 > +#define SUP_UART_DIV_H 0x18 > +#define SUP_UART_ISC 0x1C > +#define SUP_UART_TX_RESIDUE 0x20 > +#define SUP_UART_RX_RESIDUE 0x24 > + > +/* Line Status Register bits */ > +#define SUP_UART_LSR_TXE BIT(6) /* tx empty */ > +#define SUP_UART_LSR_BC BIT(5) /* break condition status */ > +#define SUP_UART_LSR_FE BIT(4) /* frame error status */ > +#define SUP_UART_LSR_OE BIT(3) /* overrun error status */ > +#define SUP_UART_LSR_PE BIT(2) /* parity error status */ > +#define SUP_UART_LSR_RX BIT(1) /* 1: receive fifo not empty */ > +#define SUP_UART_LSR_TX BIT(0) /* 1: transmit fifo is not full */ > +#define SUP_UART_LSR_TX_NOT_FULL 1 > +#define SUP_UART_LSR_BRK_ERROR_BITS GENMASK(5, 2) > + > +/* Line Control Register bits */ > +#define SUP_UART_LCR_BC BIT(5) /* break condition select */ > +#define SUP_UART_LCR_PR BIT(4) /* parity bit polarity select */ > +#define SUP_UART_LCR_PE BIT(3) /* parity bit enable */ > +#define SUP_UART_LCR_ST BIT(2) /* stop bits select */ > +#define SUP_UART_LCR_WL5 0x00 /* word length 5 */ > +#define SUP_UART_LCR_WL6 0x01 /* word length 6 */ > +#define SUP_UART_LCR_WL7 0x02 /* word length 7 */ > +#define SUP_UART_LCR_WL8 0x03 /* word length 8 (default) */ > + > +/* Modem Control Register bits */ > +#define SUP_UART_MCR_LB BIT(4) /* Loopback mode */ > +#define SUP_UART_MCR_RI BIT(3) /* ring indicator */ > +#define SUP_UART_MCR_DCD BIT(2) /* data carrier detect */ > +#define SUP_UART_MCR_RTS BIT(1) /* request to send */ > +#define SUP_UART_MCR_DTS BIT(0) /* data terminal ready */ > + > +/* Interrupt Status/Control Register bits */ > +#define SUP_UART_ISC_RXM BIT(5) /* RX interrupt enable */ > +#define SUP_UART_ISC_TXM BIT(4) /* TX interrupt enable */ > +#define SUP_UART_ISC_RX BIT(1) /* RX interrupt status */ > +#define SUP_UART_ISC_TX BIT(0) /* TX interrupt status */ > + > +#define SUP_DUMMY_READ BIT(16) /* drop bytes received on a !CREAD port */ > +#define SUP_UART_NR 5 Aren't most of these defines already in the kernel header files? Why create them again?
