Andrei Pistirica | 157b939 | 2016-01-13 18:15:43 -0700 | [diff] [blame] | 1 | /* |
| 2 | * PIC32 Integrated Serial Driver. |
| 3 | * |
| 4 | * Copyright (C) 2015 Microchip Technology, Inc. |
| 5 | * |
| 6 | * Authors: |
| 7 | * Sorin-Andrei Pistirica <andrei.pistirica@microchip.com> |
| 8 | * |
| 9 | * Licensed under GPLv2 or later. |
| 10 | */ |
| 11 | #ifndef __DT_PIC32_UART_H__ |
| 12 | #define __DT_PIC32_UART_H__ |
| 13 | |
| 14 | #define PIC32_UART_DFLT_BRATE (9600) |
| 15 | #define PIC32_UART_TX_FIFO_DEPTH (8) |
| 16 | #define PIC32_UART_RX_FIFO_DEPTH (8) |
| 17 | |
| 18 | #define PIC32_UART_MODE 0x00 |
| 19 | #define PIC32_UART_STA 0x10 |
| 20 | #define PIC32_UART_TX 0x20 |
| 21 | #define PIC32_UART_RX 0x30 |
| 22 | #define PIC32_UART_BRG 0x40 |
| 23 | |
| 24 | struct pic32_console_opt { |
| 25 | int baud; |
| 26 | int parity; |
| 27 | int bits; |
| 28 | int flow; |
| 29 | }; |
| 30 | |
| 31 | /* struct pic32_sport - pic32 serial port descriptor |
| 32 | * @port: uart port descriptor |
| 33 | * @idx: port index |
| 34 | * @irq_fault: virtual fault interrupt number |
| 35 | * @irqflags_fault: flags related to fault irq |
| 36 | * @irq_fault_name: irq fault name |
| 37 | * @irq_rx: virtual rx interrupt number |
| 38 | * @irqflags_rx: flags related to rx irq |
| 39 | * @irq_rx_name: irq rx name |
| 40 | * @irq_tx: virtual tx interrupt number |
| 41 | * @irqflags_tx: : flags related to tx irq |
| 42 | * @irq_tx_name: irq tx name |
| 43 | * @cts_gpio: clear to send gpio |
| 44 | * @dev: device descriptor |
| 45 | **/ |
| 46 | struct pic32_sport { |
| 47 | struct uart_port port; |
| 48 | struct pic32_console_opt opt; |
| 49 | int idx; |
| 50 | |
| 51 | int irq_fault; |
| 52 | int irqflags_fault; |
| 53 | const char *irq_fault_name; |
| 54 | int irq_rx; |
| 55 | int irqflags_rx; |
| 56 | const char *irq_rx_name; |
| 57 | int irq_tx; |
| 58 | int irqflags_tx; |
| 59 | const char *irq_tx_name; |
| 60 | u8 enable_tx_irq; |
| 61 | |
| 62 | bool hw_flow_ctrl; |
| 63 | int cts_gpio; |
| 64 | |
| 65 | int ref_clk; |
| 66 | struct clk *clk; |
| 67 | |
| 68 | struct device *dev; |
| 69 | }; |
| 70 | #define to_pic32_sport(c) container_of(c, struct pic32_sport, port) |
| 71 | #define pic32_get_port(sport) (&sport->port) |
| 72 | #define pic32_get_opt(sport) (&sport->opt) |
| 73 | #define tx_irq_enabled(sport) (sport->enable_tx_irq) |
| 74 | |
| 75 | static inline void pic32_uart_writel(struct pic32_sport *sport, |
| 76 | u32 reg, u32 val) |
| 77 | { |
| 78 | struct uart_port *port = pic32_get_port(sport); |
| 79 | |
| 80 | __raw_writel(val, port->membase + reg); |
| 81 | } |
| 82 | |
| 83 | static inline u32 pic32_uart_readl(struct pic32_sport *sport, u32 reg) |
| 84 | { |
| 85 | struct uart_port *port = pic32_get_port(sport); |
| 86 | |
| 87 | return __raw_readl(port->membase + reg); |
| 88 | } |
| 89 | |
| 90 | /* pic32 uart mode register bits */ |
| 91 | #define PIC32_UART_MODE_ON BIT(15) |
| 92 | #define PIC32_UART_MODE_FRZ BIT(14) |
| 93 | #define PIC32_UART_MODE_SIDL BIT(13) |
| 94 | #define PIC32_UART_MODE_IREN BIT(12) |
| 95 | #define PIC32_UART_MODE_RTSMD BIT(11) |
| 96 | #define PIC32_UART_MODE_RESV1 BIT(10) |
| 97 | #define PIC32_UART_MODE_UEN1 BIT(9) |
| 98 | #define PIC32_UART_MODE_UEN0 BIT(8) |
| 99 | #define PIC32_UART_MODE_WAKE BIT(7) |
| 100 | #define PIC32_UART_MODE_LPBK BIT(6) |
| 101 | #define PIC32_UART_MODE_ABAUD BIT(5) |
| 102 | #define PIC32_UART_MODE_RXINV BIT(4) |
| 103 | #define PIC32_UART_MODE_BRGH BIT(3) |
| 104 | #define PIC32_UART_MODE_PDSEL1 BIT(2) |
| 105 | #define PIC32_UART_MODE_PDSEL0 BIT(1) |
| 106 | #define PIC32_UART_MODE_STSEL BIT(0) |
| 107 | |
| 108 | /* pic32 uart status register bits */ |
| 109 | #define PIC32_UART_STA_UTXISEL1 BIT(15) |
| 110 | #define PIC32_UART_STA_UTXISEL0 BIT(14) |
| 111 | #define PIC32_UART_STA_UTXINV BIT(13) |
| 112 | #define PIC32_UART_STA_URXEN BIT(12) |
| 113 | #define PIC32_UART_STA_UTXBRK BIT(11) |
| 114 | #define PIC32_UART_STA_UTXEN BIT(10) |
| 115 | #define PIC32_UART_STA_UTXBF BIT(9) |
| 116 | #define PIC32_UART_STA_TRMT BIT(8) |
| 117 | #define PIC32_UART_STA_URXISEL1 BIT(7) |
| 118 | #define PIC32_UART_STA_URXISEL0 BIT(6) |
| 119 | #define PIC32_UART_STA_ADDEN BIT(5) |
| 120 | #define PIC32_UART_STA_RIDLE BIT(4) |
| 121 | #define PIC32_UART_STA_PERR BIT(3) |
| 122 | #define PIC32_UART_STA_FERR BIT(2) |
| 123 | #define PIC32_UART_STA_OERR BIT(1) |
| 124 | #define PIC32_UART_STA_URXDA BIT(0) |
| 125 | |
| 126 | #endif /* __DT_PIC32_UART_H__ */ |