diff options
Diffstat (limited to 'drivers/tty/serial/pic32_uart.h')
| -rw-r--r-- | drivers/tty/serial/pic32_uart.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/tty/serial/pic32_uart.h b/drivers/tty/serial/pic32_uart.h new file mode 100644 index 000000000000..ec379da55ebb --- /dev/null +++ b/drivers/tty/serial/pic32_uart.h @@ -0,0 +1,126 @@ +/* + * PIC32 Integrated Serial Driver. + * + * Copyright (C) 2015 Microchip Technology, Inc. + * + * Authors: + * Sorin-Andrei Pistirica <andrei.pistirica@microchip.com> + * + * Licensed under GPLv2 or later. + */ +#ifndef __DT_PIC32_UART_H__ +#define __DT_PIC32_UART_H__ + +#define PIC32_UART_DFLT_BRATE (9600) +#define PIC32_UART_TX_FIFO_DEPTH (8) +#define PIC32_UART_RX_FIFO_DEPTH (8) + +#define PIC32_UART_MODE 0x00 +#define PIC32_UART_STA 0x10 +#define PIC32_UART_TX 0x20 +#define PIC32_UART_RX 0x30 +#define PIC32_UART_BRG 0x40 + +struct pic32_console_opt { + int baud; + int parity; + int bits; + int flow; +}; + +/* struct pic32_sport - pic32 serial port descriptor + * @port: uart port descriptor + * @idx: port index + * @irq_fault: virtual fault interrupt number + * @irqflags_fault: flags related to fault irq + * @irq_fault_name: irq fault name + * @irq_rx: virtual rx interrupt number + * @irqflags_rx: flags related to rx irq + * @irq_rx_name: irq rx name + * @irq_tx: virtual tx interrupt number + * @irqflags_tx: : flags related to tx irq + * @irq_tx_name: irq tx name + * @cts_gpio: clear to send gpio + * @dev: device descriptor + **/ +struct pic32_sport { + struct uart_port port; + struct pic32_console_opt opt; + int idx; + + int irq_fault; + int irqflags_fault; + const char *irq_fault_name; + int irq_rx; + int irqflags_rx; + const char *irq_rx_name; + int irq_tx; + int irqflags_tx; + const char *irq_tx_name; + u8 enable_tx_irq; + + bool hw_flow_ctrl; + int cts_gpio; + + int ref_clk; + struct clk *clk; + + struct device *dev; +}; +#define to_pic32_sport(c) container_of(c, struct pic32_sport, port) +#define pic32_get_port(sport) (&sport->port) +#define pic32_get_opt(sport) (&sport->opt) +#define tx_irq_enabled(sport) (sport->enable_tx_irq) + +static inline void pic32_uart_writel(struct pic32_sport *sport, + u32 reg, u32 val) +{ + struct uart_port *port = pic32_get_port(sport); + + __raw_writel(val, port->membase + reg); +} + +static inline u32 pic32_uart_readl(struct pic32_sport *sport, u32 reg) +{ + struct uart_port *port = pic32_get_port(sport); + + return __raw_readl(port->membase + reg); +} + +/* pic32 uart mode register bits */ +#define PIC32_UART_MODE_ON BIT(15) +#define PIC32_UART_MODE_FRZ BIT(14) +#define PIC32_UART_MODE_SIDL BIT(13) +#define PIC32_UART_MODE_IREN BIT(12) +#define PIC32_UART_MODE_RTSMD BIT(11) +#define PIC32_UART_MODE_RESV1 BIT(10) +#define PIC32_UART_MODE_UEN1 BIT(9) +#define PIC32_UART_MODE_UEN0 BIT(8) +#define PIC32_UART_MODE_WAKE BIT(7) +#define PIC32_UART_MODE_LPBK BIT(6) +#define PIC32_UART_MODE_ABAUD BIT(5) +#define PIC32_UART_MODE_RXINV BIT(4) +#define PIC32_UART_MODE_BRGH BIT(3) +#define PIC32_UART_MODE_PDSEL1 BIT(2) +#define PIC32_UART_MODE_PDSEL0 BIT(1) +#define PIC32_UART_MODE_STSEL BIT(0) + +/* pic32 uart status register bits */ +#define PIC32_UART_STA_UTXISEL1 BIT(15) +#define PIC32_UART_STA_UTXISEL0 BIT(14) +#define PIC32_UART_STA_UTXINV BIT(13) +#define PIC32_UART_STA_URXEN BIT(12) +#define PIC32_UART_STA_UTXBRK BIT(11) +#define PIC32_UART_STA_UTXEN BIT(10) +#define PIC32_UART_STA_UTXBF BIT(9) +#define PIC32_UART_STA_TRMT BIT(8) +#define PIC32_UART_STA_URXISEL1 BIT(7) +#define PIC32_UART_STA_URXISEL0 BIT(6) +#define PIC32_UART_STA_ADDEN BIT(5) +#define PIC32_UART_STA_RIDLE BIT(4) +#define PIC32_UART_STA_PERR BIT(3) +#define PIC32_UART_STA_FERR BIT(2) +#define PIC32_UART_STA_OERR BIT(1) +#define PIC32_UART_STA_URXDA BIT(0) + +#endif /* __DT_PIC32_UART_H__ */ |