forked from Minki/linux
tty/serial: at91: remove bunch of macros to access UART registers
This patch replaces the UART_PUT_*, resp. UART_GET_*, macros by atmel_uart_writel(), resp. atmel_uart_readl(), inline function calls. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Cyrille Pitchen
Greg Kroah-Hartman
parent
3fad386014
commit
4e7decdaaa
@ -88,37 +88,6 @@ static void atmel_stop_rx(struct uart_port *port);
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#define ATMEL_ISR_PASS_LIMIT 256
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/* UART registers. CR is write-only, hence no GET macro */
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#define UART_PUT_CR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_CR)
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#define UART_GET_MR(port) __raw_readl((port)->membase + ATMEL_US_MR)
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#define UART_PUT_MR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_MR)
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#define UART_PUT_IER(port,v) __raw_writel(v, (port)->membase + ATMEL_US_IER)
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#define UART_PUT_IDR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_IDR)
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#define UART_GET_IMR(port) __raw_readl((port)->membase + ATMEL_US_IMR)
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#define UART_GET_CSR(port) __raw_readl((port)->membase + ATMEL_US_CSR)
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#define UART_GET_CHAR(port) __raw_readl((port)->membase + ATMEL_US_RHR)
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#define UART_PUT_CHAR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_THR)
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#define UART_GET_BRGR(port) __raw_readl((port)->membase + ATMEL_US_BRGR)
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#define UART_PUT_BRGR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_BRGR)
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#define UART_PUT_RTOR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_RTOR)
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#define UART_PUT_TTGR(port, v) __raw_writel(v, (port)->membase + ATMEL_US_TTGR)
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#define UART_GET_IP_NAME(port) __raw_readl((port)->membase + ATMEL_US_NAME)
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#define UART_GET_IP_VERSION(port) __raw_readl((port)->membase + ATMEL_US_VERSION)
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/* PDC registers */
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#define UART_PUT_PTCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_PTCR)
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#define UART_GET_PTSR(port) __raw_readl((port)->membase + ATMEL_PDC_PTSR)
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#define UART_PUT_RPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RPR)
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#define UART_GET_RPR(port) __raw_readl((port)->membase + ATMEL_PDC_RPR)
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#define UART_PUT_RCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RCR)
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#define UART_PUT_RNPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RNPR)
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#define UART_PUT_RNCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RNCR)
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#define UART_PUT_TPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TPR)
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#define UART_PUT_TCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TCR)
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#define UART_GET_TCR(port) __raw_readl((port)->membase + ATMEL_PDC_TCR)
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struct atmel_dma_buffer {
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unsigned char *buf;
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dma_addr_t dma_addr;
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@ -212,6 +181,16 @@ to_atmel_uart_port(struct uart_port *uart)
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return container_of(uart, struct atmel_uart_port, uart);
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}
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static inline u32 atmel_uart_readl(struct uart_port *port, u32 reg)
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{
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return __raw_readl(port->membase + reg);
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}
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static inline void atmel_uart_writel(struct uart_port *port, u32 reg, u32 value)
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{
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__raw_writel(value, port->membase + reg);
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}
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#ifdef CONFIG_SERIAL_ATMEL_PDC
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static bool atmel_use_pdc_rx(struct uart_port *port)
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{
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@ -257,7 +236,7 @@ static unsigned int atmel_get_lines_status(struct uart_port *port)
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struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
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unsigned int status, ret = 0;
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status = UART_GET_CSR(port);
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status = atmel_uart_readl(port, ATMEL_US_CSR);
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mctrl_gpio_get(atmel_port->gpios, &ret);
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@ -304,9 +283,9 @@ static int atmel_config_rs485(struct uart_port *port,
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unsigned int mode;
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/* Disable interrupts */
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UART_PUT_IDR(port, atmel_port->tx_done_mask);
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atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
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mode = UART_GET_MR(port);
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mode = atmel_uart_readl(port, ATMEL_US_MR);
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/* Resetting serial mode to RS232 (0x0) */
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mode &= ~ATMEL_US_USMODE;
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@ -316,7 +295,8 @@ static int atmel_config_rs485(struct uart_port *port,
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if (rs485conf->flags & SER_RS485_ENABLED) {
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dev_dbg(port->dev, "Setting UART to RS485\n");
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atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
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UART_PUT_TTGR(port, rs485conf->delay_rts_after_send);
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atmel_uart_writel(port, ATMEL_US_TTGR,
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rs485conf->delay_rts_after_send);
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mode |= ATMEL_US_USMODE_RS485;
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} else {
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dev_dbg(port->dev, "Setting UART to RS232\n");
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@ -326,10 +306,10 @@ static int atmel_config_rs485(struct uart_port *port,
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else
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atmel_port->tx_done_mask = ATMEL_US_TXRDY;
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}
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UART_PUT_MR(port, mode);
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atmel_uart_writel(port, ATMEL_US_MR, mode);
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/* Enable interrupts */
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UART_PUT_IER(port, atmel_port->tx_done_mask);
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atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
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return 0;
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}
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@ -339,7 +319,9 @@ static int atmel_config_rs485(struct uart_port *port,
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*/
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static u_int atmel_tx_empty(struct uart_port *port)
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{
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return (UART_GET_CSR(port) & ATMEL_US_TXEMPTY) ? TIOCSER_TEMT : 0;
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return (atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXEMPTY) ?
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TIOCSER_TEMT :
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0;
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}
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/*
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@ -348,13 +330,14 @@ static u_int atmel_tx_empty(struct uart_port *port)
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static void atmel_set_mctrl(struct uart_port *port, u_int mctrl)
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{
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unsigned int control = 0;
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unsigned int mode = UART_GET_MR(port);
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unsigned int mode = atmel_uart_readl(port, ATMEL_US_MR);
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unsigned int rts_paused, rts_ready;
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struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
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/* override mode to RS485 if needed, otherwise keep the current mode */
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if (port->rs485.flags & SER_RS485_ENABLED) {
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UART_PUT_TTGR(port, port->rs485.delay_rts_after_send);
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atmel_uart_writel(port, ATMEL_US_TTGR,
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port->rs485.delay_rts_after_send);
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mode &= ~ATMEL_US_USMODE;
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mode |= ATMEL_US_USMODE_RS485;
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}
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@ -384,7 +367,7 @@ static void atmel_set_mctrl(struct uart_port *port, u_int mctrl)
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else
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control |= ATMEL_US_DTRDIS;
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UART_PUT_CR(port, control);
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atmel_uart_writel(port, ATMEL_US_CR, control);
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mctrl_gpio_set(atmel_port->gpios, mctrl);
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@ -395,7 +378,7 @@ static void atmel_set_mctrl(struct uart_port *port, u_int mctrl)
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else
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mode |= ATMEL_US_CHMODE_NORMAL;
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UART_PUT_MR(port, mode);
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atmel_uart_writel(port, ATMEL_US_MR, mode);
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}
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/*
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@ -406,7 +389,7 @@ static u_int atmel_get_mctrl(struct uart_port *port)
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struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
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unsigned int ret = 0, status;
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status = UART_GET_CSR(port);
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status = atmel_uart_readl(port, ATMEL_US_CSR);
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/*
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* The control signals are active low.
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@ -432,10 +415,10 @@ static void atmel_stop_tx(struct uart_port *port)
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if (atmel_use_pdc_tx(port)) {
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/* disable PDC transmit */
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UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
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atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS);
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}
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/* Disable interrupts */
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UART_PUT_IDR(port, atmel_port->tx_done_mask);
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atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
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if ((port->rs485.flags & SER_RS485_ENABLED) &&
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!(port->rs485.flags & SER_RS485_RX_DURING_TX))
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@ -450,7 +433,7 @@ static void atmel_start_tx(struct uart_port *port)
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struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
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if (atmel_use_pdc_tx(port)) {
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if (UART_GET_PTSR(port) & ATMEL_PDC_TXTEN)
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if (atmel_uart_readl(port, ATMEL_PDC_PTSR) & ATMEL_PDC_TXTEN)
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/* The transmitter is already running. Yes, we
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really need this.*/
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return;
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@ -460,10 +443,10 @@ static void atmel_start_tx(struct uart_port *port)
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atmel_stop_rx(port);
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/* re-enable PDC transmit */
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UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
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atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
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}
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/* Enable interrupts */
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UART_PUT_IER(port, atmel_port->tx_done_mask);
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atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
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}
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/*
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@ -471,17 +454,19 @@ static void atmel_start_tx(struct uart_port *port)
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*/
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static void atmel_start_rx(struct uart_port *port)
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{
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UART_PUT_CR(port, ATMEL_US_RSTSTA); /* reset status and receiver */
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/* reset status and receiver */
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA);
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UART_PUT_CR(port, ATMEL_US_RXEN);
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RXEN);
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if (atmel_use_pdc_rx(port)) {
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/* enable PDC controller */
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UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT |
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port->read_status_mask);
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UART_PUT_PTCR(port, ATMEL_PDC_RXTEN);
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atmel_uart_writel(port, ATMEL_US_IER,
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ATMEL_US_ENDRX | ATMEL_US_TIMEOUT |
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port->read_status_mask);
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atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN);
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} else {
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UART_PUT_IER(port, ATMEL_US_RXRDY);
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atmel_uart_writel(port, ATMEL_US_IER, ATMEL_US_RXRDY);
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}
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}
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@ -490,15 +475,16 @@ static void atmel_start_rx(struct uart_port *port)
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*/
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static void atmel_stop_rx(struct uart_port *port)
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{
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UART_PUT_CR(port, ATMEL_US_RXDIS);
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RXDIS);
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if (atmel_use_pdc_rx(port)) {
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/* disable PDC receive */
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UART_PUT_PTCR(port, ATMEL_PDC_RXTDIS);
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UART_PUT_IDR(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT |
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port->read_status_mask);
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atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS);
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atmel_uart_writel(port, ATMEL_US_IDR,
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ATMEL_US_ENDRX | ATMEL_US_TIMEOUT |
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port->read_status_mask);
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} else {
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UART_PUT_IDR(port, ATMEL_US_RXRDY);
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atmel_uart_writel(port, ATMEL_US_IDR, ATMEL_US_RXRDY);
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}
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}
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@ -538,7 +524,7 @@ static void atmel_enable_ms(struct uart_port *port)
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else
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ier |= ATMEL_US_DCDIC;
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UART_PUT_IER(port, ier);
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atmel_uart_writel(port, ATMEL_US_IER, ier);
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}
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/*
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@ -577,7 +563,7 @@ static void atmel_disable_ms(struct uart_port *port)
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else
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idr |= ATMEL_US_DCDIC;
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UART_PUT_IDR(port, idr);
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atmel_uart_writel(port, ATMEL_US_IDR, idr);
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}
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/*
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@ -586,9 +572,11 @@ static void atmel_disable_ms(struct uart_port *port)
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static void atmel_break_ctl(struct uart_port *port, int break_state)
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{
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if (break_state != 0)
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UART_PUT_CR(port, ATMEL_US_STTBRK); /* start break */
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/* start break */
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_STTBRK);
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else
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UART_PUT_CR(port, ATMEL_US_STPBRK); /* stop break */
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/* stop break */
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_STPBRK);
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}
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/*
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@ -622,7 +610,7 @@ atmel_buffer_rx_char(struct uart_port *port, unsigned int status,
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static void atmel_pdc_rxerr(struct uart_port *port, unsigned int status)
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{
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/* clear error */
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UART_PUT_CR(port, ATMEL_US_RSTSTA);
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA);
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if (status & ATMEL_US_RXBRK) {
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/* ignore side-effect */
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@ -645,9 +633,9 @@ static void atmel_rx_chars(struct uart_port *port)
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struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
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unsigned int status, ch;
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status = UART_GET_CSR(port);
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status = atmel_uart_readl(port, ATMEL_US_CSR);
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while (status & ATMEL_US_RXRDY) {
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ch = UART_GET_CHAR(port);
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ch = atmel_uart_readl(port, ATMEL_US_RHR);
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/*
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* note that the error handling code is
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@ -658,12 +646,13 @@ static void atmel_rx_chars(struct uart_port *port)
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|| atmel_port->break_active)) {
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/* clear error */
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UART_PUT_CR(port, ATMEL_US_RSTSTA);
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atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA);
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if (status & ATMEL_US_RXBRK
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&& !atmel_port->break_active) {
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atmel_port->break_active = 1;
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UART_PUT_IER(port, ATMEL_US_RXBRK);
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atmel_uart_writel(port, ATMEL_US_IER,
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ATMEL_US_RXBRK);
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} else {
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/*
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* This is either the end-of-break
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@ -672,14 +661,15 @@ static void atmel_rx_chars(struct uart_port *port)
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* being set. In both cases, the next
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* RXBRK will indicate start-of-break.
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*/
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UART_PUT_IDR(port, ATMEL_US_RXBRK);
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atmel_uart_writel(port, ATMEL_US_IDR,
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ATMEL_US_RXBRK);
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status &= ~ATMEL_US_RXBRK;
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atmel_port->break_active = 0;
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}
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}
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atmel_buffer_rx_char(port, status, ch);
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status = UART_GET_CSR(port);
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status = atmel_uart_readl(port, ATMEL_US_CSR);
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}
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tasklet_schedule(&atmel_port->tasklet);
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@ -694,16 +684,18 @@ static void atmel_tx_chars(struct uart_port *port)
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struct circ_buf *xmit = &port->state->xmit;
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struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
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if (port->x_char && UART_GET_CSR(port) & atmel_port->tx_done_mask) {
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UART_PUT_CHAR(port, port->x_char);
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if (port->x_char &&
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(atmel_uart_readl(port, ATMEL_US_CSR) & atmel_port->tx_done_mask)) {
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atmel_uart_writel(port, ATMEL_US_THR, port->x_char);
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port->icount.tx++;
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port->x_char = 0;
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}
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if (uart_circ_empty(xmit) || uart_tx_stopped(port))
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return;
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while (UART_GET_CSR(port) & atmel_port->tx_done_mask) {
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UART_PUT_CHAR(port, xmit->buf[xmit->tail]);
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while (atmel_uart_readl(port, ATMEL_US_CSR) &
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atmel_port->tx_done_mask) {
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atmel_uart_writel(port, ATMEL_US_THR, xmit->buf[xmit->tail]);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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port->icount.tx++;
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if (uart_circ_empty(xmit))
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@ -715,7 +707,8 @@ static void atmel_tx_chars(struct uart_port *port)
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if (!uart_circ_empty(xmit))
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/* Enable interrupts */
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UART_PUT_IER(port, atmel_port->tx_done_mask);
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atmel_uart_writel(port, ATMEL_US_IER,
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atmel_port->tx_done_mask);
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}
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static void atmel_complete_tx_dma(void *arg)
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@ -935,14 +928,14 @@ static void atmel_rx_from_dma(struct uart_port *port)
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/* Reset the UART timeout early so that we don't miss one */
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UART_PUT_CR(port, ATMEL_US_STTTO);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_STTTO);
|
||||
dmastat = dmaengine_tx_status(chan,
|
||||
atmel_port->cookie_rx,
|
||||
&state);
|
||||
/* Restart a new tasklet if DMA status is error */
|
||||
if (dmastat == DMA_ERROR) {
|
||||
dev_dbg(port->dev, "Get residue error, restart tasklet\n");
|
||||
UART_PUT_IER(port, ATMEL_US_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, ATMEL_US_TIMEOUT);
|
||||
tasklet_schedule(&atmel_port->tasklet);
|
||||
return;
|
||||
}
|
||||
@ -1008,7 +1001,7 @@ static void atmel_rx_from_dma(struct uart_port *port)
|
||||
tty_flip_buffer_push(tport);
|
||||
spin_lock(&port->lock);
|
||||
|
||||
UART_PUT_IER(port, ATMEL_US_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, ATMEL_US_TIMEOUT);
|
||||
}
|
||||
|
||||
static int atmel_prepare_rx_dma(struct uart_port *port)
|
||||
@ -1118,8 +1111,8 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending)
|
||||
* the moment.
|
||||
*/
|
||||
if (pending & (ATMEL_US_ENDRX | ATMEL_US_TIMEOUT)) {
|
||||
UART_PUT_IDR(port, (ATMEL_US_ENDRX
|
||||
| ATMEL_US_TIMEOUT));
|
||||
atmel_uart_writel(port, ATMEL_US_IDR,
|
||||
(ATMEL_US_ENDRX | ATMEL_US_TIMEOUT));
|
||||
tasklet_schedule(&atmel_port->tasklet);
|
||||
}
|
||||
|
||||
@ -1130,7 +1123,8 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending)
|
||||
|
||||
if (atmel_use_dma_rx(port)) {
|
||||
if (pending & ATMEL_US_TIMEOUT) {
|
||||
UART_PUT_IDR(port, ATMEL_US_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR,
|
||||
ATMEL_US_TIMEOUT);
|
||||
tasklet_schedule(&atmel_port->tasklet);
|
||||
}
|
||||
}
|
||||
@ -1143,8 +1137,8 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending)
|
||||
* End of break detected. If it came along with a
|
||||
* character, atmel_rx_chars will handle it.
|
||||
*/
|
||||
UART_PUT_CR(port, ATMEL_US_RSTSTA);
|
||||
UART_PUT_IDR(port, ATMEL_US_RXBRK);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, ATMEL_US_RXBRK);
|
||||
atmel_port->break_active = 0;
|
||||
}
|
||||
}
|
||||
@ -1159,7 +1153,8 @@ atmel_handle_transmit(struct uart_port *port, unsigned int pending)
|
||||
|
||||
if (pending & atmel_port->tx_done_mask) {
|
||||
/* Either PDC or interrupt transmission */
|
||||
UART_PUT_IDR(port, atmel_port->tx_done_mask);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR,
|
||||
atmel_port->tx_done_mask);
|
||||
tasklet_schedule(&atmel_port->tasklet);
|
||||
}
|
||||
}
|
||||
@ -1197,7 +1192,7 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id)
|
||||
|
||||
do {
|
||||
status = atmel_get_lines_status(port);
|
||||
mask = UART_GET_IMR(port);
|
||||
mask = atmel_uart_readl(port, ATMEL_US_IMR);
|
||||
pending = status & mask;
|
||||
if (!gpio_handled) {
|
||||
/*
|
||||
@ -1223,7 +1218,7 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id)
|
||||
if (atmel_port->suspended) {
|
||||
atmel_port->pending |= pending;
|
||||
atmel_port->pending_status = status;
|
||||
UART_PUT_IDR(port, mask);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, mask);
|
||||
pm_system_wakeup();
|
||||
break;
|
||||
}
|
||||
@ -1260,7 +1255,7 @@ static void atmel_tx_pdc(struct uart_port *port)
|
||||
int count;
|
||||
|
||||
/* nothing left to transmit? */
|
||||
if (UART_GET_TCR(port))
|
||||
if (atmel_uart_readl(port, ATMEL_PDC_TCR))
|
||||
return;
|
||||
|
||||
xmit->tail += pdc->ofs;
|
||||
@ -1272,7 +1267,7 @@ static void atmel_tx_pdc(struct uart_port *port)
|
||||
/* more to transmit - setup next transfer */
|
||||
|
||||
/* disable PDC transmit */
|
||||
UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
|
||||
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS);
|
||||
|
||||
if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
|
||||
dma_sync_single_for_device(port->dev,
|
||||
@ -1283,12 +1278,14 @@ static void atmel_tx_pdc(struct uart_port *port)
|
||||
count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
|
||||
pdc->ofs = count;
|
||||
|
||||
UART_PUT_TPR(port, pdc->dma_addr + xmit->tail);
|
||||
UART_PUT_TCR(port, count);
|
||||
atmel_uart_writel(port, ATMEL_PDC_TPR,
|
||||
pdc->dma_addr + xmit->tail);
|
||||
atmel_uart_writel(port, ATMEL_PDC_TCR, count);
|
||||
/* re-enable PDC transmit */
|
||||
UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
|
||||
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
|
||||
/* Enable interrupts */
|
||||
UART_PUT_IER(port, atmel_port->tx_done_mask);
|
||||
atmel_uart_writel(port, ATMEL_US_IER,
|
||||
atmel_port->tx_done_mask);
|
||||
} else {
|
||||
if ((port->rs485.flags & SER_RS485_ENABLED) &&
|
||||
!(port->rs485.flags & SER_RS485_RX_DURING_TX)) {
|
||||
@ -1414,10 +1411,10 @@ static void atmel_rx_from_pdc(struct uart_port *port)
|
||||
|
||||
do {
|
||||
/* Reset the UART timeout early so that we don't miss one */
|
||||
UART_PUT_CR(port, ATMEL_US_STTTO);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_STTTO);
|
||||
|
||||
pdc = &atmel_port->pdc_rx[rx_idx];
|
||||
head = UART_GET_RPR(port) - pdc->dma_addr;
|
||||
head = atmel_uart_readl(port, ATMEL_PDC_RPR) - pdc->dma_addr;
|
||||
tail = pdc->ofs;
|
||||
|
||||
/* If the PDC has switched buffers, RPR won't contain
|
||||
@ -1460,8 +1457,8 @@ static void atmel_rx_from_pdc(struct uart_port *port)
|
||||
*/
|
||||
if (head >= pdc->dma_size) {
|
||||
pdc->ofs = 0;
|
||||
UART_PUT_RNPR(port, pdc->dma_addr);
|
||||
UART_PUT_RNCR(port, pdc->dma_size);
|
||||
atmel_uart_writel(port, ATMEL_PDC_RNPR, pdc->dma_addr);
|
||||
atmel_uart_writel(port, ATMEL_PDC_RNCR, pdc->dma_size);
|
||||
|
||||
rx_idx = !rx_idx;
|
||||
atmel_port->pdc_rx_idx = rx_idx;
|
||||
@ -1476,7 +1473,8 @@ static void atmel_rx_from_pdc(struct uart_port *port)
|
||||
tty_flip_buffer_push(tport);
|
||||
spin_lock(&port->lock);
|
||||
|
||||
UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_IER,
|
||||
ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
|
||||
}
|
||||
|
||||
static int atmel_prepare_rx_pdc(struct uart_port *port)
|
||||
@ -1509,11 +1507,12 @@ static int atmel_prepare_rx_pdc(struct uart_port *port)
|
||||
|
||||
atmel_port->pdc_rx_idx = 0;
|
||||
|
||||
UART_PUT_RPR(port, atmel_port->pdc_rx[0].dma_addr);
|
||||
UART_PUT_RCR(port, PDC_BUFFER_SIZE);
|
||||
atmel_uart_writel(port, ATMEL_PDC_RPR, atmel_port->pdc_rx[0].dma_addr);
|
||||
atmel_uart_writel(port, ATMEL_PDC_RCR, PDC_BUFFER_SIZE);
|
||||
|
||||
UART_PUT_RNPR(port, atmel_port->pdc_rx[1].dma_addr);
|
||||
UART_PUT_RNCR(port, PDC_BUFFER_SIZE);
|
||||
atmel_uart_writel(port, ATMEL_PDC_RNPR,
|
||||
atmel_port->pdc_rx[1].dma_addr);
|
||||
atmel_uart_writel(port, ATMEL_PDC_RNCR, PDC_BUFFER_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1667,7 +1666,7 @@ static void atmel_set_ops(struct uart_port *port)
|
||||
static void atmel_get_ip_name(struct uart_port *port)
|
||||
{
|
||||
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
|
||||
int name = UART_GET_IP_NAME(port);
|
||||
int name = atmel_uart_readl(port, ATMEL_US_NAME);
|
||||
u32 version;
|
||||
int usart, uart;
|
||||
/* usart and uart ascii */
|
||||
@ -1684,7 +1683,7 @@ static void atmel_get_ip_name(struct uart_port *port)
|
||||
atmel_port->is_usart = false;
|
||||
} else {
|
||||
/* fallback for older SoCs: use version field */
|
||||
version = UART_GET_IP_VERSION(port);
|
||||
version = atmel_uart_readl(port, ATMEL_US_VERSION);
|
||||
switch (version) {
|
||||
case 0x302:
|
||||
case 0x10213:
|
||||
@ -1756,7 +1755,7 @@ static int atmel_startup(struct uart_port *port)
|
||||
* request_irq() is called we could get stuck trying to
|
||||
* handle an unexpected interrupt
|
||||
*/
|
||||
UART_PUT_IDR(port, -1);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, -1);
|
||||
atmel_port->ms_irq_enabled = false;
|
||||
|
||||
/*
|
||||
@ -1804,9 +1803,9 @@ static int atmel_startup(struct uart_port *port)
|
||||
/*
|
||||
* Finally, enable the serial port
|
||||
*/
|
||||
UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
|
||||
/* enable xmit & rcvr */
|
||||
UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
|
||||
|
||||
setup_timer(&atmel_port->uart_timer,
|
||||
atmel_uart_timer_callback,
|
||||
@ -1819,13 +1818,14 @@ static int atmel_startup(struct uart_port *port)
|
||||
jiffies + uart_poll_timeout(port));
|
||||
/* set USART timeout */
|
||||
} else {
|
||||
UART_PUT_RTOR(port, PDC_RX_TIMEOUT);
|
||||
UART_PUT_CR(port, ATMEL_US_STTTO);
|
||||
atmel_uart_writel(port, ATMEL_US_RTOR, PDC_RX_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_STTTO);
|
||||
|
||||
UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_IER,
|
||||
ATMEL_US_ENDRX | ATMEL_US_TIMEOUT);
|
||||
}
|
||||
/* enable PDC controller */
|
||||
UART_PUT_PTCR(port, ATMEL_PDC_RXTEN);
|
||||
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN);
|
||||
} else if (atmel_use_dma_rx(port)) {
|
||||
/* set UART timeout */
|
||||
if (!atmel_port->is_usart) {
|
||||
@ -1833,14 +1833,15 @@ static int atmel_startup(struct uart_port *port)
|
||||
jiffies + uart_poll_timeout(port));
|
||||
/* set USART timeout */
|
||||
} else {
|
||||
UART_PUT_RTOR(port, PDC_RX_TIMEOUT);
|
||||
UART_PUT_CR(port, ATMEL_US_STTTO);
|
||||
atmel_uart_writel(port, ATMEL_US_RTOR, PDC_RX_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_STTTO);
|
||||
|
||||
UART_PUT_IER(port, ATMEL_US_TIMEOUT);
|
||||
atmel_uart_writel(port, ATMEL_US_IER,
|
||||
ATMEL_US_TIMEOUT);
|
||||
}
|
||||
} else {
|
||||
/* enable receive only */
|
||||
UART_PUT_IER(port, ATMEL_US_RXRDY);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, ATMEL_US_RXRDY);
|
||||
}
|
||||
|
||||
return 0;
|
||||
@ -1860,7 +1861,7 @@ static void atmel_flush_buffer(struct uart_port *port)
|
||||
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
|
||||
|
||||
if (atmel_use_pdc_tx(port)) {
|
||||
UART_PUT_TCR(port, 0);
|
||||
atmel_uart_writel(port, ATMEL_PDC_TCR, 0);
|
||||
atmel_port->pdc_tx.ofs = 0;
|
||||
}
|
||||
}
|
||||
@ -1892,8 +1893,8 @@ static void atmel_shutdown(struct uart_port *port)
|
||||
atmel_stop_rx(port);
|
||||
atmel_stop_tx(port);
|
||||
|
||||
UART_PUT_CR(port, ATMEL_US_RSTSTA);
|
||||
UART_PUT_IDR(port, -1);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, -1);
|
||||
|
||||
|
||||
/*
|
||||
@ -1938,12 +1939,12 @@ static void atmel_serial_pm(struct uart_port *port, unsigned int state,
|
||||
clk_prepare_enable(atmel_port->clk);
|
||||
|
||||
/* re-enable interrupts if we disabled some on suspend */
|
||||
UART_PUT_IER(port, atmel_port->backup_imr);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, atmel_port->backup_imr);
|
||||
break;
|
||||
case 3:
|
||||
/* Back up the interrupt mask and disable all interrupts */
|
||||
atmel_port->backup_imr = UART_GET_IMR(port);
|
||||
UART_PUT_IDR(port, -1);
|
||||
atmel_port->backup_imr = atmel_uart_readl(port, ATMEL_US_IMR);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, -1);
|
||||
|
||||
/*
|
||||
* Disable the peripheral clock for this serial port.
|
||||
@ -1966,7 +1967,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
unsigned int old_mode, mode, imr, quot, baud;
|
||||
|
||||
/* save the current mode register */
|
||||
mode = old_mode = UART_GET_MR(port);
|
||||
mode = old_mode = atmel_uart_readl(port, ATMEL_US_MR);
|
||||
|
||||
/* reset the mode, clock divisor, parity, stop bits and data size */
|
||||
mode &= ~(ATMEL_US_USCLKS | ATMEL_US_CHRL | ATMEL_US_NBSTOP |
|
||||
@ -2025,7 +2026,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
|
||||
if (atmel_use_pdc_rx(port))
|
||||
/* need to enable error interrupts */
|
||||
UART_PUT_IER(port, port->read_status_mask);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, port->read_status_mask);
|
||||
|
||||
/*
|
||||
* Characters to ignore
|
||||
@ -2052,15 +2053,16 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
* transmitter is empty if requested by the caller, so there's
|
||||
* no need to wait for it here.
|
||||
*/
|
||||
imr = UART_GET_IMR(port);
|
||||
UART_PUT_IDR(port, -1);
|
||||
imr = atmel_uart_readl(port, ATMEL_US_IMR);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, -1);
|
||||
|
||||
/* disable receiver and transmitter */
|
||||
UART_PUT_CR(port, ATMEL_US_TXDIS | ATMEL_US_RXDIS);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXDIS | ATMEL_US_RXDIS);
|
||||
|
||||
/* mode */
|
||||
if (port->rs485.flags & SER_RS485_ENABLED) {
|
||||
UART_PUT_TTGR(port, port->rs485.delay_rts_after_send);
|
||||
atmel_uart_writel(port, ATMEL_US_TTGR,
|
||||
port->rs485.delay_rts_after_send);
|
||||
mode |= ATMEL_US_USMODE_RS485;
|
||||
} else if (termios->c_cflag & CRTSCTS) {
|
||||
/* RS232 with hardware handshake (RTS/CTS) */
|
||||
@ -2071,7 +2073,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
}
|
||||
|
||||
/* set the mode, clock divisor, parity, stop bits and data size */
|
||||
UART_PUT_MR(port, mode);
|
||||
atmel_uart_writel(port, ATMEL_US_MR, mode);
|
||||
|
||||
/*
|
||||
* when switching the mode, set the RTS line state according to the
|
||||
@ -2088,16 +2090,16 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
rts_state = ATMEL_US_RTSEN;
|
||||
}
|
||||
|
||||
UART_PUT_CR(port, rts_state);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, rts_state);
|
||||
}
|
||||
|
||||
/* set the baud rate */
|
||||
UART_PUT_BRGR(port, quot);
|
||||
UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
|
||||
UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
|
||||
atmel_uart_writel(port, ATMEL_US_BRGR, quot);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
|
||||
|
||||
/* restore interrupts */
|
||||
UART_PUT_IER(port, imr);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, imr);
|
||||
|
||||
/* CTS flow-control and modem-status interrupts */
|
||||
if (UART_ENABLE_MS(port, termios->c_cflag))
|
||||
@ -2208,18 +2210,18 @@ static int atmel_verify_port(struct uart_port *port, struct serial_struct *ser)
|
||||
#ifdef CONFIG_CONSOLE_POLL
|
||||
static int atmel_poll_get_char(struct uart_port *port)
|
||||
{
|
||||
while (!(UART_GET_CSR(port) & ATMEL_US_RXRDY))
|
||||
while (!(atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_RXRDY))
|
||||
cpu_relax();
|
||||
|
||||
return UART_GET_CHAR(port);
|
||||
return atmel_uart_readl(port, ATMEL_US_RHR);
|
||||
}
|
||||
|
||||
static void atmel_poll_put_char(struct uart_port *port, unsigned char ch)
|
||||
{
|
||||
while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY))
|
||||
while (!(atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY))
|
||||
cpu_relax();
|
||||
|
||||
UART_PUT_CHAR(port, ch);
|
||||
atmel_uart_writel(port, ATMEL_US_THR, ch);
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -2324,9 +2326,9 @@ struct platform_device *atmel_default_console_device; /* the serial console devi
|
||||
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
|
||||
static void atmel_console_putchar(struct uart_port *port, int ch)
|
||||
{
|
||||
while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY))
|
||||
while (!(atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY))
|
||||
cpu_relax();
|
||||
UART_PUT_CHAR(port, ch);
|
||||
atmel_uart_writel(port, ATMEL_US_THR, ch);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -2342,12 +2344,13 @@ static void atmel_console_write(struct console *co, const char *s, u_int count)
|
||||
/*
|
||||
* First, save IMR and then disable interrupts
|
||||
*/
|
||||
imr = UART_GET_IMR(port);
|
||||
UART_PUT_IDR(port, ATMEL_US_RXRDY | atmel_port->tx_done_mask);
|
||||
imr = atmel_uart_readl(port, ATMEL_US_IMR);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR,
|
||||
ATMEL_US_RXRDY | atmel_port->tx_done_mask);
|
||||
|
||||
/* Store PDC transmit status and disable it */
|
||||
pdc_tx = UART_GET_PTSR(port) & ATMEL_PDC_TXTEN;
|
||||
UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS);
|
||||
pdc_tx = atmel_uart_readl(port, ATMEL_PDC_PTSR) & ATMEL_PDC_TXTEN;
|
||||
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS);
|
||||
|
||||
uart_console_write(port, s, count, atmel_console_putchar);
|
||||
|
||||
@ -2356,15 +2359,15 @@ static void atmel_console_write(struct console *co, const char *s, u_int count)
|
||||
* and restore IMR
|
||||
*/
|
||||
do {
|
||||
status = UART_GET_CSR(port);
|
||||
status = atmel_uart_readl(port, ATMEL_US_CSR);
|
||||
} while (!(status & ATMEL_US_TXRDY));
|
||||
|
||||
/* Restore PDC transmit status */
|
||||
if (pdc_tx)
|
||||
UART_PUT_PTCR(port, ATMEL_PDC_TXTEN);
|
||||
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
|
||||
|
||||
/* set interrupts back the way they were */
|
||||
UART_PUT_IER(port, imr);
|
||||
atmel_uart_writel(port, ATMEL_US_IER, imr);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -2380,17 +2383,17 @@ static void __init atmel_console_get_options(struct uart_port *port, int *baud,
|
||||
* If the baud rate generator isn't running, the port wasn't
|
||||
* initialized by the boot loader.
|
||||
*/
|
||||
quot = UART_GET_BRGR(port) & ATMEL_US_CD;
|
||||
quot = atmel_uart_readl(port, ATMEL_US_BRGR) & ATMEL_US_CD;
|
||||
if (!quot)
|
||||
return;
|
||||
|
||||
mr = UART_GET_MR(port) & ATMEL_US_CHRL;
|
||||
mr = atmel_uart_readl(port, ATMEL_US_MR) & ATMEL_US_CHRL;
|
||||
if (mr == ATMEL_US_CHRL_8)
|
||||
*bits = 8;
|
||||
else
|
||||
*bits = 7;
|
||||
|
||||
mr = UART_GET_MR(port) & ATMEL_US_PAR;
|
||||
mr = atmel_uart_readl(port, ATMEL_US_MR) & ATMEL_US_PAR;
|
||||
if (mr == ATMEL_US_PAR_EVEN)
|
||||
*parity = 'e';
|
||||
else if (mr == ATMEL_US_PAR_ODD)
|
||||
@ -2423,9 +2426,9 @@ static int __init atmel_console_setup(struct console *co, char *options)
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
UART_PUT_IDR(port, -1);
|
||||
UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
|
||||
UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
|
||||
atmel_uart_writel(port, ATMEL_US_IDR, -1);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_RSTSTA | ATMEL_US_RSTRX);
|
||||
atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN | ATMEL_US_RXEN);
|
||||
|
||||
if (options)
|
||||
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
||||
@ -2532,7 +2535,8 @@ static int atmel_serial_suspend(struct platform_device *pdev,
|
||||
|
||||
if (atmel_is_console_port(port) && console_suspend_enabled) {
|
||||
/* Drain the TX shifter */
|
||||
while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY))
|
||||
while (!(atmel_uart_readl(port, ATMEL_US_CSR) &
|
||||
ATMEL_US_TXEMPTY))
|
||||
cpu_relax();
|
||||
}
|
||||
|
||||
@ -2684,8 +2688,9 @@ static int atmel_serial_probe(struct platform_device *pdev)
|
||||
clk_prepare_enable(port->clk);
|
||||
|
||||
if (rs485_enabled) {
|
||||
UART_PUT_MR(&port->uart, ATMEL_US_USMODE_NORMAL);
|
||||
UART_PUT_CR(&port->uart, ATMEL_US_RTSEN);
|
||||
atmel_uart_writel(&port->uart, ATMEL_US_MR,
|
||||
ATMEL_US_USMODE_NORMAL);
|
||||
atmel_uart_writel(&port->uart, ATMEL_US_CR, ATMEL_US_RTSEN);
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user