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Diffstat (limited to 'arch/m68k/include/asm/mcfuart.h')
| -rw-r--r-- | arch/m68k/include/asm/mcfuart.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/mcfuart.h b/arch/m68k/include/asm/mcfuart.h new file mode 100644 index 000000000..a1f35352f --- /dev/null +++ b/arch/m68k/include/asm/mcfuart.h @@ -0,0 +1,189 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/****************************************************************************/ + +/* + * mcfuart.h -- ColdFire internal UART support defines. + * + * (C) Copyright 1999-2003, Greg Ungerer (gerg@snapgear.com) + * (C) Copyright 2000, Lineo Inc. (www.lineo.com) + */ + +/****************************************************************************/ +#ifndef mcfuart_h +#define mcfuart_h +/****************************************************************************/ + +#include <linux/serial_core.h> +#include <linux/platform_device.h> + +struct mcf_platform_uart { + unsigned long mapbase; /* Physical address base */ + void __iomem *membase; /* Virtual address if mapped */ + unsigned int irq; /* Interrupt vector */ + unsigned int uartclk; /* UART clock rate */ +}; + +/* + * Define the ColdFire UART register set addresses. + */ +#define MCFUART_UMR 0x00 /* Mode register (r/w) */ +#define MCFUART_USR 0x04 /* Status register (r) */ +#define MCFUART_UCSR 0x04 /* Clock Select (w) */ +#define MCFUART_UCR 0x08 /* Command register (w) */ +#define MCFUART_URB 0x0c /* Receiver Buffer (r) */ +#define MCFUART_UTB 0x0c /* Transmit Buffer (w) */ +#define MCFUART_UIPCR 0x10 /* Input Port Change (r) */ +#define MCFUART_UACR 0x10 /* Auxiliary Control (w) */ +#define MCFUART_UISR 0x14 /* Interrupt Status (r) */ +#define MCFUART_UIMR 0x14 /* Interrupt Mask (w) */ +#define MCFUART_UBG1 0x18 /* Baud Rate MSB (r/w) */ +#define MCFUART_UBG2 0x1c /* Baud Rate LSB (r/w) */ +#ifdef CONFIG_M5272 +#define MCFUART_UTF 0x28 /* Transmitter FIFO (r/w) */ +#define MCFUART_URF 0x2c /* Receiver FIFO (r/w) */ +#define MCFUART_UFPD 0x30 /* Frac Prec. Divider (r/w) */ +#endif +#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \ + defined(CONFIG_M5249) || defined(CONFIG_M525x) || \ + defined(CONFIG_M5307) || defined(CONFIG_M5407) +#define MCFUART_UIVR 0x30 /* Interrupt Vector (r/w) */ +#endif +#define MCFUART_UIPR 0x34 /* Input Port (r) */ +#define MCFUART_UOP1 0x38 /* Output Port Bit Set (w) */ +#define MCFUART_UOP0 0x3c /* Output Port Bit Reset (w) */ + + +/* + * Define bit flags in Mode Register 1 (MR1). + */ +#define MCFUART_MR1_RXRTS 0x80 /* Auto RTS flow control */ +#define MCFUART_MR1_RXIRQFULL 0x40 /* RX IRQ type FULL */ +#define MCFUART_MR1_RXIRQRDY 0x00 /* RX IRQ type RDY */ +#define MCFUART_MR1_RXERRBLOCK 0x20 /* RX block error mode */ +#define MCFUART_MR1_RXERRCHAR 0x00 /* RX char error mode */ + +#define MCFUART_MR1_PARITYNONE 0x10 /* No parity */ +#define MCFUART_MR1_PARITYEVEN 0x00 /* Even parity */ +#define MCFUART_MR1_PARITYODD 0x04 /* Odd parity */ +#define MCFUART_MR1_PARITYSPACE 0x08 /* Space parity */ +#define MCFUART_MR1_PARITYMARK 0x0c /* Mark parity */ + +#define MCFUART_MR1_CS5 0x00 /* 5 bits per char */ +#define MCFUART_MR1_CS6 0x01 /* 6 bits per char */ +#define MCFUART_MR1_CS7 0x02 /* 7 bits per char */ +#define MCFUART_MR1_CS8 0x03 /* 8 bits per char */ + +/* + * Define bit flags in Mode Register 2 (MR2). + */ +#define MCFUART_MR2_LOOPBACK 0x80 /* Loopback mode */ +#define MCFUART_MR2_REMOTELOOP 0xc0 /* Remote loopback mode */ +#define MCFUART_MR2_AUTOECHO 0x40 /* Automatic echo */ +#define MCFUART_MR2_TXRTS 0x20 /* Assert RTS on TX */ +#define MCFUART_MR2_TXCTS 0x10 /* Auto CTS flow control */ + +#define MCFUART_MR2_STOP1 0x07 /* 1 stop bit */ +#define MCFUART_MR2_STOP15 0x08 /* 1.5 stop bits */ +#define MCFUART_MR2_STOP2 0x0f /* 2 stop bits */ + +/* + * Define bit flags in Status Register (USR). + */ +#define MCFUART_USR_RXBREAK 0x80 /* Received BREAK */ +#define MCFUART_USR_RXFRAMING 0x40 /* Received framing error */ +#define MCFUART_USR_RXPARITY 0x20 /* Received parity error */ +#define MCFUART_USR_RXOVERRUN 0x10 /* Received overrun error */ +#define MCFUART_USR_TXEMPTY 0x08 /* Transmitter empty */ +#define MCFUART_USR_TXREADY 0x04 /* Transmitter ready */ +#define MCFUART_USR_RXFULL 0x02 /* Receiver full */ +#define MCFUART_USR_RXREADY 0x01 /* Receiver ready */ + +#define MCFUART_USR_RXERR (MCFUART_USR_RXBREAK | MCFUART_USR_RXFRAMING | \ + MCFUART_USR_RXPARITY | MCFUART_USR_RXOVERRUN) + +/* + * Define bit flags in Clock Select Register (UCSR). + */ +#define MCFUART_UCSR_RXCLKTIMER 0xd0 /* RX clock is timer */ +#define MCFUART_UCSR_RXCLKEXT16 0xe0 /* RX clock is external x16 */ +#define MCFUART_UCSR_RXCLKEXT1 0xf0 /* RX clock is external x1 */ + +#define MCFUART_UCSR_TXCLKTIMER 0x0d /* TX clock is timer */ +#define MCFUART_UCSR_TXCLKEXT16 0x0e /* TX clock is external x16 */ +#define MCFUART_UCSR_TXCLKEXT1 0x0f /* TX clock is external x1 */ + +/* + * Define bit flags in Command Register (UCR). + */ +#define MCFUART_UCR_CMDNULL 0x00 /* No command */ +#define MCFUART_UCR_CMDRESETMRPTR 0x10 /* Reset MR pointer */ +#define MCFUART_UCR_CMDRESETRX 0x20 /* Reset receiver */ +#define MCFUART_UCR_CMDRESETTX 0x30 /* Reset transmitter */ +#define MCFUART_UCR_CMDRESETERR 0x40 /* Reset error status */ +#define MCFUART_UCR_CMDRESETBREAK 0x50 /* Reset BREAK change */ +#define MCFUART_UCR_CMDBREAKSTART 0x60 /* Start BREAK */ +#define MCFUART_UCR_CMDBREAKSTOP 0x70 /* Stop BREAK */ + +#define MCFUART_UCR_TXNULL 0x00 /* No TX command */ +#define MCFUART_UCR_TXENABLE 0x04 /* Enable TX */ +#define MCFUART_UCR_TXDISABLE 0x08 /* Disable TX */ +#define MCFUART_UCR_RXNULL 0x00 /* No RX command */ +#define MCFUART_UCR_RXENABLE 0x01 /* Enable RX */ +#define MCFUART_UCR_RXDISABLE 0x02 /* Disable RX */ + +/* + * Define bit flags in Input Port Change Register (UIPCR). + */ +#define MCFUART_UIPCR_CTSCOS 0x10 /* CTS change of state */ +#define MCFUART_UIPCR_CTS 0x01 /* CTS value */ + +/* + * Define bit flags in Input Port Register (UIP). + */ +#define MCFUART_UIPR_CTS 0x01 /* CTS value */ + +/* + * Define bit flags in Output Port Registers (UOP). + * Clear bit by writing to UOP0, set by writing to UOP1. + */ +#define MCFUART_UOP_RTS 0x01 /* RTS set or clear */ + +/* + * Define bit flags in the Auxiliary Control Register (UACR). + */ +#define MCFUART_UACR_IEC 0x01 /* Input enable control */ + +/* + * Define bit flags in Interrupt Status Register (UISR). + * These same bits are used for the Interrupt Mask Register (UIMR). + */ +#define MCFUART_UIR_COS 0x80 /* Change of state (CTS) */ +#define MCFUART_UIR_DELTABREAK 0x04 /* Break start or stop */ +#define MCFUART_UIR_RXREADY 0x02 /* Receiver ready */ +#define MCFUART_UIR_TXREADY 0x01 /* Transmitter ready */ + +#ifdef CONFIG_M5272 +/* + * Define bit flags in the Transmitter FIFO Register (UTF). + */ +#define MCFUART_UTF_TXB 0x1f /* Transmitter data level */ +#define MCFUART_UTF_FULL 0x20 /* Transmitter fifo full */ +#define MCFUART_UTF_TXS 0xc0 /* Transmitter status */ + +/* + * Define bit flags in the Receiver FIFO Register (URF). + */ +#define MCFUART_URF_RXB 0x1f /* Receiver data level */ +#define MCFUART_URF_FULL 0x20 /* Receiver fifo full */ +#define MCFUART_URF_RXS 0xc0 /* Receiver status */ +#endif + +#if defined(CONFIG_M54xx) +#define MCFUART_TXFIFOSIZE 512 +#elif defined(CONFIG_M5272) +#define MCFUART_TXFIFOSIZE 25 +#else +#define MCFUART_TXFIFOSIZE 1 +#endif +/****************************************************************************/ +#endif /* mcfuart_h */ |