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/*
* 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__ */
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