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tty: serial: fsl_lpuart: add 32-bit register interface support
This add the 32-bit register version LPUART support with big-endian byte order. Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jingchang Lu
Greg Kroah-Hartman
parent
876496b8cd
commit
380c966c09
@ -1,7 +1,7 @@
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/*
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* Freescale lpuart serial port driver
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*
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* Copyright 2012-2013 Freescale Semiconductor, Inc.
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* Copyright 2012-2014 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -117,6 +117,113 @@
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#define UARTSFIFO_TXOF 0x02
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#define UARTSFIFO_RXUF 0x01
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/* 32-bit register defination */
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#define UARTBAUD 0x00
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#define UARTSTAT 0x04
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#define UARTCTRL 0x08
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#define UARTDATA 0x0C
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#define UARTMATCH 0x10
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#define UARTMODIR 0x14
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#define UARTFIFO 0x18
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#define UARTWATER 0x1c
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#define UARTBAUD_MAEN1 0x80000000
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#define UARTBAUD_MAEN2 0x40000000
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#define UARTBAUD_M10 0x20000000
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#define UARTBAUD_TDMAE 0x00800000
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#define UARTBAUD_RDMAE 0x00200000
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#define UARTBAUD_MATCFG 0x00400000
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#define UARTBAUD_BOTHEDGE 0x00020000
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#define UARTBAUD_RESYNCDIS 0x00010000
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#define UARTBAUD_LBKDIE 0x00008000
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#define UARTBAUD_RXEDGIE 0x00004000
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#define UARTBAUD_SBNS 0x00002000
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#define UARTBAUD_SBR 0x00000000
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#define UARTBAUD_SBR_MASK 0x1fff
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#define UARTSTAT_LBKDIF 0x80000000
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#define UARTSTAT_RXEDGIF 0x40000000
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#define UARTSTAT_MSBF 0x20000000
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#define UARTSTAT_RXINV 0x10000000
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#define UARTSTAT_RWUID 0x08000000
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#define UARTSTAT_BRK13 0x04000000
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#define UARTSTAT_LBKDE 0x02000000
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#define UARTSTAT_RAF 0x01000000
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#define UARTSTAT_TDRE 0x00800000
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#define UARTSTAT_TC 0x00400000
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#define UARTSTAT_RDRF 0x00200000
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#define UARTSTAT_IDLE 0x00100000
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#define UARTSTAT_OR 0x00080000
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#define UARTSTAT_NF 0x00040000
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#define UARTSTAT_FE 0x00020000
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#define UARTSTAT_PE 0x00010000
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#define UARTSTAT_MA1F 0x00008000
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#define UARTSTAT_M21F 0x00004000
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#define UARTCTRL_R8T9 0x80000000
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#define UARTCTRL_R9T8 0x40000000
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#define UARTCTRL_TXDIR 0x20000000
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#define UARTCTRL_TXINV 0x10000000
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#define UARTCTRL_ORIE 0x08000000
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#define UARTCTRL_NEIE 0x04000000
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#define UARTCTRL_FEIE 0x02000000
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#define UARTCTRL_PEIE 0x01000000
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#define UARTCTRL_TIE 0x00800000
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#define UARTCTRL_TCIE 0x00400000
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#define UARTCTRL_RIE 0x00200000
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#define UARTCTRL_ILIE 0x00100000
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#define UARTCTRL_TE 0x00080000
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#define UARTCTRL_RE 0x00040000
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#define UARTCTRL_RWU 0x00020000
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#define UARTCTRL_SBK 0x00010000
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#define UARTCTRL_MA1IE 0x00008000
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#define UARTCTRL_MA2IE 0x00004000
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#define UARTCTRL_IDLECFG 0x00000100
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#define UARTCTRL_LOOPS 0x00000080
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#define UARTCTRL_DOZEEN 0x00000040
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#define UARTCTRL_RSRC 0x00000020
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#define UARTCTRL_M 0x00000010
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#define UARTCTRL_WAKE 0x00000008
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#define UARTCTRL_ILT 0x00000004
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#define UARTCTRL_PE 0x00000002
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#define UARTCTRL_PT 0x00000001
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#define UARTDATA_NOISY 0x00008000
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#define UARTDATA_PARITYE 0x00004000
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#define UARTDATA_FRETSC 0x00002000
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#define UARTDATA_RXEMPT 0x00001000
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#define UARTDATA_IDLINE 0x00000800
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#define UARTDATA_MASK 0x3ff
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#define UARTMODIR_IREN 0x00020000
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#define UARTMODIR_TXCTSSRC 0x00000020
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#define UARTMODIR_TXCTSC 0x00000010
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#define UARTMODIR_RXRTSE 0x00000008
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#define UARTMODIR_TXRTSPOL 0x00000004
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#define UARTMODIR_TXRTSE 0x00000002
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#define UARTMODIR_TXCTSE 0x00000001
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#define UARTFIFO_TXEMPT 0x00800000
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#define UARTFIFO_RXEMPT 0x00400000
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#define UARTFIFO_TXOF 0x00020000
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#define UARTFIFO_RXUF 0x00010000
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#define UARTFIFO_TXFLUSH 0x00008000
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#define UARTFIFO_RXFLUSH 0x00004000
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#define UARTFIFO_TXOFE 0x00000200
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#define UARTFIFO_RXUFE 0x00000100
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#define UARTFIFO_TXFE 0x00000080
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#define UARTFIFO_FIFOSIZE_MASK 0x7
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#define UARTFIFO_TXSIZE_OFF 4
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#define UARTFIFO_RXFE 0x00000008
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#define UARTFIFO_RXSIZE_OFF 0
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#define UARTWATER_COUNT_MASK 0xff
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#define UARTWATER_TXCNT_OFF 8
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#define UARTWATER_RXCNT_OFF 24
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#define UARTWATER_WATER_MASK 0xff
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#define UARTWATER_TXWATER_OFF 0
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#define UARTWATER_RXWATER_OFF 16
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#define FSL_UART_RX_DMA_BUFFER_SIZE 64
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#define DRIVER_NAME "fsl-lpuart"
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@ -128,6 +235,7 @@ struct lpuart_port {
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struct clk *clk;
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unsigned int txfifo_size;
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unsigned int rxfifo_size;
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bool lpuart32;
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bool lpuart_dma_use;
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struct dma_chan *dma_tx_chan;
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@ -152,6 +260,9 @@ static struct of_device_id lpuart_dt_ids[] = {
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{
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.compatible = "fsl,vf610-lpuart",
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},
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{
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.compatible = "fsl,ls1021a-lpuart",
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
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@ -160,6 +271,16 @@ MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
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static void lpuart_dma_tx_complete(void *arg);
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static void lpuart_dma_rx_complete(void *arg);
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static u32 lpuart32_read(void __iomem *addr)
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{
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return ioread32be(addr);
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}
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static void lpuart32_write(u32 val, void __iomem *addr)
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{
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iowrite32be(val, addr);
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}
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static void lpuart_stop_tx(struct uart_port *port)
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{
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unsigned char temp;
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@ -169,6 +290,15 @@ static void lpuart_stop_tx(struct uart_port *port)
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writeb(temp, port->membase + UARTCR2);
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}
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static void lpuart32_stop_tx(struct uart_port *port)
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{
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unsigned long temp;
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temp = lpuart32_read(port->membase + UARTCTRL);
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temp &= ~(UARTCTRL_TIE | UARTCTRL_TCIE);
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lpuart32_write(temp, port->membase + UARTCTRL);
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}
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static void lpuart_stop_rx(struct uart_port *port)
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{
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unsigned char temp;
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@ -177,6 +307,14 @@ static void lpuart_stop_rx(struct uart_port *port)
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writeb(temp & ~UARTCR2_RE, port->membase + UARTCR2);
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}
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static void lpuart32_stop_rx(struct uart_port *port)
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{
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unsigned long temp;
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temp = lpuart32_read(port->membase + UARTCTRL);
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lpuart32_write(temp & ~UARTCTRL_RE, port->membase + UARTCTRL);
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}
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static void lpuart_copy_rx_to_tty(struct lpuart_port *sport,
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struct tty_port *tty, int count)
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{
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@ -399,6 +537,30 @@ static inline void lpuart_transmit_buffer(struct lpuart_port *sport)
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lpuart_stop_tx(&sport->port);
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}
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static inline void lpuart32_transmit_buffer(struct lpuart_port *sport)
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{
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struct circ_buf *xmit = &sport->port.state->xmit;
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unsigned long txcnt;
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txcnt = lpuart32_read(sport->port.membase + UARTWATER);
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txcnt = txcnt >> UARTWATER_TXCNT_OFF;
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txcnt &= UARTWATER_COUNT_MASK;
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while (!uart_circ_empty(xmit) && (txcnt < sport->txfifo_size)) {
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lpuart32_write(xmit->buf[xmit->tail], sport->port.membase + UARTDATA);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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sport->port.icount.tx++;
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txcnt = lpuart32_read(sport->port.membase + UARTWATER);
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txcnt = txcnt >> UARTWATER_TXCNT_OFF;
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txcnt &= UARTWATER_COUNT_MASK;
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}
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(&sport->port);
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if (uart_circ_empty(xmit))
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lpuart32_stop_tx(&sport->port);
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}
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static void lpuart_start_tx(struct uart_port *port)
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{
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struct lpuart_port *sport = container_of(port,
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@ -418,6 +580,18 @@ static void lpuart_start_tx(struct uart_port *port)
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}
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}
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static void lpuart32_start_tx(struct uart_port *port)
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{
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struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
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unsigned long temp;
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temp = lpuart32_read(port->membase + UARTCTRL);
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lpuart32_write(temp | UARTCTRL_TIE, port->membase + UARTCTRL);
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if (lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TDRE)
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lpuart32_transmit_buffer(sport);
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}
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static irqreturn_t lpuart_txint(int irq, void *dev_id)
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{
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struct lpuart_port *sport = dev_id;
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@ -426,15 +600,24 @@ static irqreturn_t lpuart_txint(int irq, void *dev_id)
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spin_lock_irqsave(&sport->port.lock, flags);
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if (sport->port.x_char) {
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if (sport->lpuart32)
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lpuart32_write(sport->port.x_char, sport->port.membase + UARTDATA);
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else
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writeb(sport->port.x_char, sport->port.membase + UARTDR);
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goto out;
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}
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if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) {
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if (sport->lpuart32)
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lpuart32_stop_tx(&sport->port);
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else
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lpuart_stop_tx(&sport->port);
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goto out;
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}
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if (sport->lpuart32)
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lpuart32_transmit_buffer(sport);
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else
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lpuart_transmit_buffer(sport);
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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@ -508,6 +691,70 @@ out:
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return IRQ_HANDLED;
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}
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static irqreturn_t lpuart32_rxint(int irq, void *dev_id)
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{
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struct lpuart_port *sport = dev_id;
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unsigned int flg, ignored = 0;
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struct tty_port *port = &sport->port.state->port;
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unsigned long flags;
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unsigned long rx, sr;
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spin_lock_irqsave(&sport->port.lock, flags);
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while (!(lpuart32_read(sport->port.membase + UARTFIFO) & UARTFIFO_RXEMPT)) {
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flg = TTY_NORMAL;
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sport->port.icount.rx++;
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/*
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* to clear the FE, OR, NF, FE, PE flags,
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* read STAT then read DATA reg
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*/
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sr = lpuart32_read(sport->port.membase + UARTSTAT);
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rx = lpuart32_read(sport->port.membase + UARTDATA);
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rx &= 0x3ff;
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if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx))
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continue;
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if (sr & (UARTSTAT_PE | UARTSTAT_OR | UARTSTAT_FE)) {
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if (sr & UARTSTAT_PE)
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sport->port.icount.parity++;
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else if (sr & UARTSTAT_FE)
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sport->port.icount.frame++;
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if (sr & UARTSTAT_OR)
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sport->port.icount.overrun++;
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if (sr & sport->port.ignore_status_mask) {
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if (++ignored > 100)
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goto out;
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continue;
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}
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sr &= sport->port.read_status_mask;
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if (sr & UARTSTAT_PE)
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flg = TTY_PARITY;
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else if (sr & UARTSTAT_FE)
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flg = TTY_FRAME;
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if (sr & UARTSTAT_OR)
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flg = TTY_OVERRUN;
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#ifdef SUPPORT_SYSRQ
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sport->port.sysrq = 0;
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#endif
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}
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tty_insert_flip_char(port, rx, flg);
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}
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out:
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spin_unlock_irqrestore(&sport->port.lock, flags);
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tty_flip_buffer_push(port);
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return IRQ_HANDLED;
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}
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static irqreturn_t lpuart_int(int irq, void *dev_id)
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{
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struct lpuart_port *sport = dev_id;
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@ -532,6 +779,26 @@ static irqreturn_t lpuart_int(int irq, void *dev_id)
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return IRQ_HANDLED;
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}
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static irqreturn_t lpuart32_int(int irq, void *dev_id)
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{
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struct lpuart_port *sport = dev_id;
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unsigned long sts, rxcount;
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sts = lpuart32_read(sport->port.membase + UARTSTAT);
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rxcount = lpuart32_read(sport->port.membase + UARTWATER);
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rxcount = rxcount >> UARTWATER_RXCNT_OFF;
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if (sts & UARTSTAT_RDRF || rxcount > 0)
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lpuart32_rxint(irq, dev_id);
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if ((sts & UARTSTAT_TDRE) &&
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!(lpuart32_read(sport->port.membase + UARTBAUD) & UARTBAUD_TDMAE))
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lpuart_txint(irq, dev_id);
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lpuart32_write(sts, sport->port.membase + UARTSTAT);
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return IRQ_HANDLED;
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}
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/* return TIOCSER_TEMT when transmitter is not busy */
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static unsigned int lpuart_tx_empty(struct uart_port *port)
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{
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@ -539,6 +806,12 @@ static unsigned int lpuart_tx_empty(struct uart_port *port)
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TIOCSER_TEMT : 0;
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}
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static unsigned int lpuart32_tx_empty(struct uart_port *port)
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{
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return (lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TC) ?
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TIOCSER_TEMT : 0;
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}
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static unsigned int lpuart_get_mctrl(struct uart_port *port)
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{
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unsigned int temp = 0;
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@ -554,6 +827,21 @@ static unsigned int lpuart_get_mctrl(struct uart_port *port)
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return temp;
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}
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static unsigned int lpuart32_get_mctrl(struct uart_port *port)
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{
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unsigned int temp = 0;
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unsigned long reg;
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reg = lpuart32_read(port->membase + UARTMODIR);
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if (reg & UARTMODIR_TXCTSE)
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temp |= TIOCM_CTS;
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if (reg & UARTMODIR_RXRTSE)
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temp |= TIOCM_RTS;
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return temp;
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}
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static void lpuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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unsigned char temp;
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@ -570,6 +858,22 @@ static void lpuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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writeb(temp, port->membase + UARTMODEM);
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}
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static void lpuart32_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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unsigned long temp;
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temp = lpuart32_read(port->membase + UARTMODIR) &
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~(UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
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if (mctrl & TIOCM_RTS)
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temp |= UARTMODIR_RXRTSE;
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if (mctrl & TIOCM_CTS)
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temp |= UARTMODIR_TXCTSE;
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lpuart32_write(temp, port->membase + UARTMODIR);
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}
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static void lpuart_break_ctl(struct uart_port *port, int break_state)
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{
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unsigned char temp;
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@ -582,6 +886,18 @@ static void lpuart_break_ctl(struct uart_port *port, int break_state)
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writeb(temp, port->membase + UARTCR2);
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}
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static void lpuart32_break_ctl(struct uart_port *port, int break_state)
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{
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unsigned long temp;
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temp = lpuart32_read(port->membase + UARTCTRL) & ~UARTCTRL_SBK;
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if (break_state != 0)
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temp |= UARTCTRL_SBK;
|
||||
|
||||
lpuart32_write(temp, port->membase + UARTCTRL);
|
||||
}
|
||||
|
||||
static void lpuart_setup_watermark(struct lpuart_port *sport)
|
||||
{
|
||||
unsigned char val, cr2;
|
||||
@ -608,6 +924,31 @@ static void lpuart_setup_watermark(struct lpuart_port *sport)
|
||||
writeb(cr2_saved, sport->port.membase + UARTCR2);
|
||||
}
|
||||
|
||||
static void lpuart32_setup_watermark(struct lpuart_port *sport)
|
||||
{
|
||||
unsigned long val, ctrl;
|
||||
unsigned long ctrl_saved;
|
||||
|
||||
ctrl = lpuart32_read(sport->port.membase + UARTCTRL);
|
||||
ctrl_saved = ctrl;
|
||||
ctrl &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_TE |
|
||||
UARTCTRL_RIE | UARTCTRL_RE);
|
||||
lpuart32_write(ctrl, sport->port.membase + UARTCTRL);
|
||||
|
||||
/* enable FIFO mode */
|
||||
val = lpuart32_read(sport->port.membase + UARTFIFO);
|
||||
val |= UARTFIFO_TXFE | UARTFIFO_RXFE;
|
||||
val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH;
|
||||
lpuart32_write(val, sport->port.membase + UARTFIFO);
|
||||
|
||||
/* set the watermark */
|
||||
val = (0x1 << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF);
|
||||
lpuart32_write(val, sport->port.membase + UARTWATER);
|
||||
|
||||
/* Restore cr2 */
|
||||
lpuart32_write(ctrl_saved, sport->port.membase + UARTCTRL);
|
||||
}
|
||||
|
||||
static int lpuart_dma_tx_request(struct uart_port *port)
|
||||
{
|
||||
struct lpuart_port *sport = container_of(port,
|
||||
@ -786,6 +1127,40 @@ static int lpuart_startup(struct uart_port *port)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int lpuart32_startup(struct uart_port *port)
|
||||
{
|
||||
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
|
||||
int ret;
|
||||
unsigned long flags;
|
||||
unsigned long temp;
|
||||
|
||||
/* determine FIFO size */
|
||||
temp = lpuart32_read(sport->port.membase + UARTFIFO);
|
||||
|
||||
sport->txfifo_size = 0x1 << (((temp >> UARTFIFO_TXSIZE_OFF) &
|
||||
UARTFIFO_FIFOSIZE_MASK) - 1);
|
||||
|
||||
sport->rxfifo_size = 0x1 << (((temp >> UARTFIFO_RXSIZE_OFF) &
|
||||
UARTFIFO_FIFOSIZE_MASK) - 1);
|
||||
|
||||
ret = devm_request_irq(port->dev, port->irq, lpuart32_int, 0,
|
||||
DRIVER_NAME, sport);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
spin_lock_irqsave(&sport->port.lock, flags);
|
||||
|
||||
lpuart32_setup_watermark(sport);
|
||||
|
||||
temp = lpuart32_read(sport->port.membase + UARTCTRL);
|
||||
temp |= (UARTCTRL_RIE | UARTCTRL_TIE | UARTCTRL_RE | UARTCTRL_TE);
|
||||
temp |= UARTCTRL_ILIE;
|
||||
lpuart32_write(temp, sport->port.membase + UARTCTRL);
|
||||
|
||||
spin_unlock_irqrestore(&sport->port.lock, flags);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void lpuart_shutdown(struct uart_port *port)
|
||||
{
|
||||
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
|
||||
@ -810,6 +1185,25 @@ static void lpuart_shutdown(struct uart_port *port)
|
||||
}
|
||||
}
|
||||
|
||||
static void lpuart32_shutdown(struct uart_port *port)
|
||||
{
|
||||
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
|
||||
unsigned long temp;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
|
||||
/* disable Rx/Tx and interrupts */
|
||||
temp = lpuart32_read(port->membase + UARTCTRL);
|
||||
temp &= ~(UARTCTRL_TE | UARTCTRL_RE |
|
||||
UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE);
|
||||
lpuart32_write(temp, port->membase + UARTCTRL);
|
||||
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
|
||||
devm_free_irq(port->dev, port->irq, sport);
|
||||
}
|
||||
|
||||
static void
|
||||
lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
struct ktermios *old)
|
||||
@ -947,6 +1341,125 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
spin_unlock_irqrestore(&sport->port.lock, flags);
|
||||
}
|
||||
|
||||
static void
|
||||
lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
struct ktermios *old)
|
||||
{
|
||||
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
|
||||
unsigned long flags;
|
||||
unsigned long ctrl, old_ctrl, bd, modem;
|
||||
unsigned int baud;
|
||||
unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
|
||||
unsigned int sbr;
|
||||
|
||||
ctrl = old_ctrl = lpuart32_read(sport->port.membase + UARTCTRL);
|
||||
bd = lpuart32_read(sport->port.membase + UARTBAUD);
|
||||
modem = lpuart32_read(sport->port.membase + UARTMODIR);
|
||||
/*
|
||||
* only support CS8 and CS7, and for CS7 must enable PE.
|
||||
* supported mode:
|
||||
* - (7,e/o,1)
|
||||
* - (8,n,1)
|
||||
* - (8,m/s,1)
|
||||
* - (8,e/o,1)
|
||||
*/
|
||||
while ((termios->c_cflag & CSIZE) != CS8 &&
|
||||
(termios->c_cflag & CSIZE) != CS7) {
|
||||
termios->c_cflag &= ~CSIZE;
|
||||
termios->c_cflag |= old_csize;
|
||||
old_csize = CS8;
|
||||
}
|
||||
|
||||
if ((termios->c_cflag & CSIZE) == CS8 ||
|
||||
(termios->c_cflag & CSIZE) == CS7)
|
||||
ctrl = old_ctrl & ~UARTCTRL_M;
|
||||
|
||||
if (termios->c_cflag & CMSPAR) {
|
||||
if ((termios->c_cflag & CSIZE) != CS8) {
|
||||
termios->c_cflag &= ~CSIZE;
|
||||
termios->c_cflag |= CS8;
|
||||
}
|
||||
ctrl |= UARTCTRL_M;
|
||||
}
|
||||
|
||||
if (termios->c_cflag & CRTSCTS) {
|
||||
modem |= (UARTMODEM_RXRTSE | UARTMODEM_TXCTSE);
|
||||
} else {
|
||||
termios->c_cflag &= ~CRTSCTS;
|
||||
modem &= ~(UARTMODEM_RXRTSE | UARTMODEM_TXCTSE);
|
||||
}
|
||||
|
||||
if (termios->c_cflag & CSTOPB)
|
||||
termios->c_cflag &= ~CSTOPB;
|
||||
|
||||
/* parity must be enabled when CS7 to match 8-bits format */
|
||||
if ((termios->c_cflag & CSIZE) == CS7)
|
||||
termios->c_cflag |= PARENB;
|
||||
|
||||
if ((termios->c_cflag & PARENB)) {
|
||||
if (termios->c_cflag & CMSPAR) {
|
||||
ctrl &= ~UARTCTRL_PE;
|
||||
ctrl |= UARTCTRL_M;
|
||||
} else {
|
||||
ctrl |= UARTCR1_PE;
|
||||
if ((termios->c_cflag & CSIZE) == CS8)
|
||||
ctrl |= UARTCTRL_M;
|
||||
if (termios->c_cflag & PARODD)
|
||||
ctrl |= UARTCTRL_PT;
|
||||
else
|
||||
ctrl &= ~UARTCTRL_PT;
|
||||
}
|
||||
}
|
||||
|
||||
/* ask the core to calculate the divisor */
|
||||
baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
|
||||
|
||||
spin_lock_irqsave(&sport->port.lock, flags);
|
||||
|
||||
sport->port.read_status_mask = 0;
|
||||
if (termios->c_iflag & INPCK)
|
||||
sport->port.read_status_mask |= (UARTSTAT_FE | UARTSTAT_PE);
|
||||
if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
|
||||
sport->port.read_status_mask |= UARTSTAT_FE;
|
||||
|
||||
/* characters to ignore */
|
||||
sport->port.ignore_status_mask = 0;
|
||||
if (termios->c_iflag & IGNPAR)
|
||||
sport->port.ignore_status_mask |= UARTSTAT_PE;
|
||||
if (termios->c_iflag & IGNBRK) {
|
||||
sport->port.ignore_status_mask |= UARTSTAT_FE;
|
||||
/*
|
||||
* if we're ignoring parity and break indicators,
|
||||
* ignore overruns too (for real raw support).
|
||||
*/
|
||||
if (termios->c_iflag & IGNPAR)
|
||||
sport->port.ignore_status_mask |= UARTSTAT_OR;
|
||||
}
|
||||
|
||||
/* update the per-port timeout */
|
||||
uart_update_timeout(port, termios->c_cflag, baud);
|
||||
|
||||
/* wait transmit engin complete */
|
||||
while (!(lpuart32_read(sport->port.membase + UARTSTAT) & UARTSTAT_TC))
|
||||
barrier();
|
||||
|
||||
/* disable transmit and receive */
|
||||
lpuart32_write(old_ctrl & ~(UARTCTRL_TE | UARTCTRL_RE),
|
||||
sport->port.membase + UARTCTRL);
|
||||
|
||||
sbr = sport->port.uartclk / (16 * baud);
|
||||
bd &= ~UARTBAUD_SBR_MASK;
|
||||
bd |= sbr & UARTBAUD_SBR_MASK;
|
||||
bd |= UARTBAUD_BOTHEDGE;
|
||||
bd &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE);
|
||||
lpuart32_write(bd, sport->port.membase + UARTBAUD);
|
||||
lpuart32_write(modem, sport->port.membase + UARTMODIR);
|
||||
lpuart32_write(ctrl, sport->port.membase + UARTCTRL);
|
||||
/* restore control register */
|
||||
|
||||
spin_unlock_irqrestore(&sport->port.lock, flags);
|
||||
}
|
||||
|
||||
static const char *lpuart_type(struct uart_port *port)
|
||||
{
|
||||
return "FSL_LPUART";
|
||||
@ -1006,6 +1519,24 @@ static struct uart_ops lpuart_pops = {
|
||||
.verify_port = lpuart_verify_port,
|
||||
};
|
||||
|
||||
static struct uart_ops lpuart32_pops = {
|
||||
.tx_empty = lpuart32_tx_empty,
|
||||
.set_mctrl = lpuart32_set_mctrl,
|
||||
.get_mctrl = lpuart32_get_mctrl,
|
||||
.stop_tx = lpuart32_stop_tx,
|
||||
.start_tx = lpuart32_start_tx,
|
||||
.stop_rx = lpuart32_stop_rx,
|
||||
.break_ctl = lpuart32_break_ctl,
|
||||
.startup = lpuart32_startup,
|
||||
.shutdown = lpuart32_shutdown,
|
||||
.set_termios = lpuart32_set_termios,
|
||||
.type = lpuart_type,
|
||||
.request_port = lpuart_request_port,
|
||||
.release_port = lpuart_release_port,
|
||||
.config_port = lpuart_config_port,
|
||||
.verify_port = lpuart_verify_port,
|
||||
};
|
||||
|
||||
static struct lpuart_port *lpuart_ports[UART_NR];
|
||||
|
||||
#ifdef CONFIG_SERIAL_FSL_LPUART_CONSOLE
|
||||
@ -1017,6 +1548,14 @@ static void lpuart_console_putchar(struct uart_port *port, int ch)
|
||||
writeb(ch, port->membase + UARTDR);
|
||||
}
|
||||
|
||||
static void lpuart32_console_putchar(struct uart_port *port, int ch)
|
||||
{
|
||||
while (!(lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TDRE))
|
||||
barrier();
|
||||
|
||||
lpuart32_write(ch, port->membase + UARTDATA);
|
||||
}
|
||||
|
||||
static void
|
||||
lpuart_console_write(struct console *co, const char *s, unsigned int count)
|
||||
{
|
||||
@ -1038,6 +1577,27 @@ lpuart_console_write(struct console *co, const char *s, unsigned int count)
|
||||
writeb(old_cr2, sport->port.membase + UARTCR2);
|
||||
}
|
||||
|
||||
static void
|
||||
lpuart32_console_write(struct console *co, const char *s, unsigned int count)
|
||||
{
|
||||
struct lpuart_port *sport = lpuart_ports[co->index];
|
||||
unsigned long old_cr, cr;
|
||||
|
||||
/* first save CR2 and then disable interrupts */
|
||||
cr = old_cr = lpuart32_read(sport->port.membase + UARTCTRL);
|
||||
cr |= (UARTCTRL_TE | UARTCTRL_RE);
|
||||
cr &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE);
|
||||
lpuart32_write(cr, sport->port.membase + UARTCTRL);
|
||||
|
||||
uart_console_write(&sport->port, s, count, lpuart32_console_putchar);
|
||||
|
||||
/* wait for transmitter finish complete and restore CR2 */
|
||||
while (!(lpuart32_read(sport->port.membase + UARTSTAT) & UARTSTAT_TC))
|
||||
barrier();
|
||||
|
||||
lpuart32_write(old_cr, sport->port.membase + UARTCTRL);
|
||||
}
|
||||
|
||||
/*
|
||||
* if the port was already initialised (eg, by a boot loader),
|
||||
* try to determine the current setup.
|
||||
@ -1091,6 +1651,49 @@ lpuart_console_get_options(struct lpuart_port *sport, int *baud,
|
||||
"from %d to %d\n", baud_raw, *baud);
|
||||
}
|
||||
|
||||
static void __init
|
||||
lpuart32_console_get_options(struct lpuart_port *sport, int *baud,
|
||||
int *parity, int *bits)
|
||||
{
|
||||
unsigned long cr, bd;
|
||||
unsigned int sbr, uartclk, baud_raw;
|
||||
|
||||
cr = lpuart32_read(sport->port.membase + UARTCTRL);
|
||||
cr &= UARTCTRL_TE | UARTCTRL_RE;
|
||||
if (!cr)
|
||||
return;
|
||||
|
||||
/* ok, the port was enabled */
|
||||
|
||||
cr = lpuart32_read(sport->port.membase + UARTCTRL);
|
||||
|
||||
*parity = 'n';
|
||||
if (cr & UARTCTRL_PE) {
|
||||
if (cr & UARTCTRL_PT)
|
||||
*parity = 'o';
|
||||
else
|
||||
*parity = 'e';
|
||||
}
|
||||
|
||||
if (cr & UARTCTRL_M)
|
||||
*bits = 9;
|
||||
else
|
||||
*bits = 8;
|
||||
|
||||
bd = lpuart32_read(sport->port.membase + UARTBAUD);
|
||||
bd &= UARTBAUD_SBR_MASK;
|
||||
sbr = bd;
|
||||
uartclk = clk_get_rate(sport->clk);
|
||||
/*
|
||||
* baud = mod_clk/(16*(sbr[13]+(brfa)/32)
|
||||
*/
|
||||
baud_raw = uartclk / (16 * sbr);
|
||||
|
||||
if (*baud != baud_raw)
|
||||
printk(KERN_INFO "Serial: Console lpuart rounded baud rate"
|
||||
"from %d to %d\n", baud_raw, *baud);
|
||||
}
|
||||
|
||||
static int __init lpuart_console_setup(struct console *co, char *options)
|
||||
{
|
||||
struct lpuart_port *sport;
|
||||
@ -1113,9 +1716,15 @@ static int __init lpuart_console_setup(struct console *co, char *options)
|
||||
|
||||
if (options)
|
||||
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
||||
else
|
||||
if (sport->lpuart32)
|
||||
lpuart32_console_get_options(sport, &baud, &parity, &bits);
|
||||
else
|
||||
lpuart_console_get_options(sport, &baud, &parity, &bits);
|
||||
|
||||
if (sport->lpuart32)
|
||||
lpuart32_setup_watermark(sport);
|
||||
else
|
||||
lpuart_setup_watermark(sport);
|
||||
|
||||
return uart_set_options(&sport->port, co, baud, parity, bits, flow);
|
||||
@ -1132,9 +1741,21 @@ static struct console lpuart_console = {
|
||||
.data = &lpuart_reg,
|
||||
};
|
||||
|
||||
static struct console lpuart32_console = {
|
||||
.name = DEV_NAME,
|
||||
.write = lpuart32_console_write,
|
||||
.device = uart_console_device,
|
||||
.setup = lpuart_console_setup,
|
||||
.flags = CON_PRINTBUFFER,
|
||||
.index = -1,
|
||||
.data = &lpuart_reg,
|
||||
};
|
||||
|
||||
#define LPUART_CONSOLE (&lpuart_console)
|
||||
#define LPUART32_CONSOLE (&lpuart32_console)
|
||||
#else
|
||||
#define LPUART_CONSOLE NULL
|
||||
#define LPUART32_CONSOLE NULL
|
||||
#endif
|
||||
|
||||
static struct uart_driver lpuart_reg = {
|
||||
@ -1164,7 +1785,7 @@ static int lpuart_probe(struct platform_device *pdev)
|
||||
return ret;
|
||||
}
|
||||
sport->port.line = ret;
|
||||
|
||||
sport->lpuart32 = of_device_is_compatible(np, "fsl,ls1021a-lpuart");
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res)
|
||||
return -ENODEV;
|
||||
@ -1178,6 +1799,9 @@ static int lpuart_probe(struct platform_device *pdev)
|
||||
sport->port.type = PORT_LPUART;
|
||||
sport->port.iotype = UPIO_MEM;
|
||||
sport->port.irq = platform_get_irq(pdev, 0);
|
||||
if (sport->lpuart32)
|
||||
sport->port.ops = &lpuart32_pops;
|
||||
else
|
||||
sport->port.ops = &lpuart_pops;
|
||||
sport->port.flags = UPF_BOOT_AUTOCONF;
|
||||
|
||||
@ -1200,6 +1824,11 @@ static int lpuart_probe(struct platform_device *pdev)
|
||||
|
||||
platform_set_drvdata(pdev, &sport->port);
|
||||
|
||||
if (sport->lpuart32)
|
||||
lpuart_reg.cons = LPUART32_CONSOLE;
|
||||
else
|
||||
lpuart_reg.cons = LPUART_CONSOLE;
|
||||
|
||||
ret = uart_add_one_port(&lpuart_reg, &sport->port);
|
||||
if (ret) {
|
||||
clk_disable_unprepare(sport->clk);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user