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serial: imx: drop support for IRDA
Support for IRDA was added in 2009 in commit v2.6.31-rc1~399^2~2. There are no in-tree users. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König
Greg Kroah-Hartman
parent
f95661b2f2
commit
afe9cbb1a6
@ -6,9 +6,6 @@
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* Author: Sascha Hauer <sascha@saschahauer.de>
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* Copyright (C) 2004 Pengutronix
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*
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* Author: Fabian Godehardt (added IrDA support for iMX)
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* Copyright (C) 2009 emlix GmbH
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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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* the Free Software Foundation; either version 2 of the License, or
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@ -201,7 +198,6 @@ struct imx_port {
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unsigned int old_status;
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unsigned int have_rtscts:1;
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unsigned int dte_mode:1;
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unsigned int use_irda:1;
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unsigned int irda_inv_rx:1;
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unsigned int irda_inv_tx:1;
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unsigned short trcv_delay; /* transceiver delay */
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@ -228,12 +224,6 @@ struct imx_port_ucrs {
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unsigned int ucr3;
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};
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#ifdef CONFIG_IRDA
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#define USE_IRDA(sport) ((sport)->use_irda)
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#else
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#define USE_IRDA(sport) (0)
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#endif
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static struct imx_uart_data imx_uart_devdata[] = {
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[IMX1_UART] = {
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.uts_reg = IMX1_UTS,
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@ -368,48 +358,6 @@ static void imx_stop_tx(struct uart_port *port)
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struct imx_port *sport = (struct imx_port *)port;
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unsigned long temp;
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if (USE_IRDA(sport)) {
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/* half duplex - wait for end of transmission */
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int n = 256;
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while ((--n > 0) &&
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!(readl(sport->port.membase + USR2) & USR2_TXDC)) {
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udelay(5);
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barrier();
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}
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/*
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* irda transceiver - wait a bit more to avoid
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* cutoff, hardware dependent
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*/
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udelay(sport->trcv_delay);
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/*
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* half duplex - reactivate receive mode,
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* flush receive pipe echo crap
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*/
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if (readl(sport->port.membase + USR2) & USR2_TXDC) {
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temp = readl(sport->port.membase + UCR1);
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temp &= ~(UCR1_TXMPTYEN | UCR1_TRDYEN);
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writel(temp, sport->port.membase + UCR1);
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temp = readl(sport->port.membase + UCR4);
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temp &= ~(UCR4_TCEN);
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writel(temp, sport->port.membase + UCR4);
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while (readl(sport->port.membase + URXD0) &
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URXD_CHARRDY)
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barrier();
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temp = readl(sport->port.membase + UCR1);
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temp |= UCR1_RRDYEN;
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writel(temp, sport->port.membase + UCR1);
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temp = readl(sport->port.membase + UCR4);
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temp |= UCR4_DREN;
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writel(temp, sport->port.membase + UCR4);
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}
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return;
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}
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/*
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* We are maybe in the SMP context, so if the DMA TX thread is running
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* on other cpu, we have to wait for it to finish.
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@ -612,32 +560,11 @@ static void imx_start_tx(struct uart_port *port)
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struct imx_port *sport = (struct imx_port *)port;
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unsigned long temp;
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if (USE_IRDA(sport)) {
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/* half duplex in IrDA mode; have to disable receive mode */
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temp = readl(sport->port.membase + UCR4);
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temp &= ~(UCR4_DREN);
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writel(temp, sport->port.membase + UCR4);
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temp = readl(sport->port.membase + UCR1);
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temp &= ~(UCR1_RRDYEN);
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writel(temp, sport->port.membase + UCR1);
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}
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if (!sport->dma_is_enabled) {
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temp = readl(sport->port.membase + UCR1);
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writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1);
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}
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if (USE_IRDA(sport)) {
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temp = readl(sport->port.membase + UCR1);
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temp |= UCR1_TRDYEN;
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writel(temp, sport->port.membase + UCR1);
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temp = readl(sport->port.membase + UCR4);
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temp |= UCR4_TCEN;
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writel(temp, sport->port.membase + UCR4);
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}
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if (sport->dma_is_enabled) {
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if (sport->port.x_char) {
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/* We have X-char to send, so enable TX IRQ and
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@ -1148,9 +1075,6 @@ static int imx_startup(struct uart_port *port)
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*/
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temp = readl(sport->port.membase + UCR4);
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if (USE_IRDA(sport))
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temp |= UCR4_IRSC;
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/* set the trigger level for CTS */
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temp &= ~(UCR4_CTSTL_MASK << UCR4_CTSTL_SHF);
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temp |= CTSTL << UCR4_CTSTL_SHF;
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@ -1186,11 +1110,6 @@ static int imx_startup(struct uart_port *port)
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temp = readl(sport->port.membase + UCR1);
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temp |= UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN;
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if (USE_IRDA(sport)) {
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temp |= UCR1_IREN;
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temp &= ~(UCR1_RTSDEN);
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}
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writel(temp, sport->port.membase + UCR1);
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temp = readl(sport->port.membase + UCR4);
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@ -1209,38 +1128,12 @@ static int imx_startup(struct uart_port *port)
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writel(temp, sport->port.membase + UCR3);
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}
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if (USE_IRDA(sport)) {
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temp = readl(sport->port.membase + UCR4);
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if (sport->irda_inv_rx)
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temp |= UCR4_INVR;
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else
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temp &= ~(UCR4_INVR);
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writel(temp | UCR4_DREN, sport->port.membase + UCR4);
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temp = readl(sport->port.membase + UCR3);
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if (sport->irda_inv_tx)
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temp |= UCR3_INVT;
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else
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temp &= ~(UCR3_INVT);
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writel(temp, sport->port.membase + UCR3);
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}
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/*
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* Enable modem status interrupts
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*/
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imx_enable_ms(&sport->port);
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spin_unlock_irqrestore(&sport->port.lock, flags);
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if (USE_IRDA(sport)) {
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struct imxuart_platform_data *pdata;
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pdata = dev_get_platdata(sport->port.dev);
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sport->irda_inv_rx = pdata->irda_inv_rx;
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sport->irda_inv_tx = pdata->irda_inv_tx;
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sport->trcv_delay = pdata->transceiver_delay;
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if (pdata->irda_enable)
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pdata->irda_enable(1);
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}
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return 0;
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}
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@ -1276,13 +1169,6 @@ static void imx_shutdown(struct uart_port *port)
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writel(temp, sport->port.membase + UCR2);
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spin_unlock_irqrestore(&sport->port.lock, flags);
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if (USE_IRDA(sport)) {
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struct imxuart_platform_data *pdata;
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pdata = dev_get_platdata(sport->port.dev);
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if (pdata->irda_enable)
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pdata->irda_enable(0);
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}
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/*
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* Stop our timer.
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*/
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@ -1295,8 +1181,6 @@ static void imx_shutdown(struct uart_port *port)
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spin_lock_irqsave(&sport->port.lock, flags);
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temp = readl(sport->port.membase + UCR1);
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temp &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN);
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if (USE_IRDA(sport))
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temp &= ~(UCR1_IREN);
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writel(temp, sport->port.membase + UCR1);
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spin_unlock_irqrestore(&sport->port.lock, flags);
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@ -1450,24 +1334,16 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
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sport->port.membase + UCR2);
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old_txrxen &= (UCR2_TXEN | UCR2_RXEN);
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if (USE_IRDA(sport)) {
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/*
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* use maximum available submodule frequency to
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* avoid missing short pulses due to low sampling rate
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*/
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div = 1;
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} else {
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/* custom-baudrate handling */
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div = sport->port.uartclk / (baud * 16);
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if (baud == 38400 && quot != div)
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baud = sport->port.uartclk / (quot * 16);
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/* custom-baudrate handling */
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div = sport->port.uartclk / (baud * 16);
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if (baud == 38400 && quot != div)
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baud = sport->port.uartclk / (quot * 16);
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div = sport->port.uartclk / (baud * 16);
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if (div > 7)
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div = 7;
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if (!div)
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div = 1;
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}
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div = sport->port.uartclk / (baud * 16);
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if (div > 7)
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div = 7;
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if (!div)
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div = 1;
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rational_best_approximation(16 * div * baud, sport->port.uartclk,
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1 << 16, 1 << 16, &num, &denom);
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@ -1906,9 +1782,6 @@ static int serial_imx_probe_dt(struct imx_port *sport,
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if (of_get_property(np, "fsl,uart-has-rtscts", NULL))
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sport->have_rtscts = 1;
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if (of_get_property(np, "fsl,irda-mode", NULL))
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sport->use_irda = 1;
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if (of_get_property(np, "fsl,dte-mode", NULL))
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sport->dte_mode = 1;
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@ -1937,9 +1810,6 @@ static void serial_imx_probe_pdata(struct imx_port *sport,
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if (pdata->flags & IMXUART_HAVE_RTSCTS)
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sport->have_rtscts = 1;
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if (pdata->flags & IMXUART_IRDA)
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sport->use_irda = 1;
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}
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static int serial_imx_probe(struct platform_device *pdev)
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@ -2012,15 +1882,6 @@ static int serial_imx_probe(struct platform_device *pdev)
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dev_name(&pdev->dev), sport);
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if (ret)
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return ret;
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/* do not use RTS IRQ on IrDA */
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if (!USE_IRDA(sport)) {
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ret = devm_request_irq(&pdev->dev, rtsirq,
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imx_rtsint, 0,
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dev_name(&pdev->dev), sport);
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if (ret)
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return ret;
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}
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} else {
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ret = devm_request_irq(&pdev->dev, rxirq, imx_int, 0,
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dev_name(&pdev->dev), sport);
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@ -20,14 +20,9 @@
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#define ASMARM_ARCH_UART_H
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#define IMXUART_HAVE_RTSCTS (1<<0)
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#define IMXUART_IRDA (1<<1)
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struct imxuart_platform_data {
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unsigned int flags;
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void (*irda_enable)(int enable);
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unsigned int irda_inv_rx:1;
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unsigned int irda_inv_tx:1;
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unsigned short transceiver_delay;
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};
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#endif
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