+++ /dev/null
-/*
- * linux/drivers/serial/cpm_uart.c
- *
- * Driver for CPM (SCC/SMC) serial ports; core driver
- *
- * Based on arch/ppc/cpm2_io/uart.c by Dan Malek
- * Based on ppc8xx.c by Thomas Gleixner
- * Based on drivers/serial/amba.c by Russell King
- *
- * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
- * Pantelis Antoniou (panto@intracom.gr) (CPM1)
- *
- * Copyright (C) 2004, 2007 Freescale Semiconductor, Inc.
- * (C) 2004 Intracom, S.A.
- * (C) 2005-2006 MontaVista Software, Inc.
- * Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/tty.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/serial.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/device.h>
-#include <linux/bootmem.h>
-#include <linux/dma-mapping.h>
-#include <linux/fs_uart_pd.h>
-#include <linux/of_platform.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
-#include <linux/clk.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/delay.h>
-#include <asm/fs_pd.h>
-#include <asm/udbg.h>
-
-#if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/serial_core.h>
-#include <linux/kernel.h>
-
-#include "cpm_uart.h"
-
-
-/**************************************************************/
-
-static int cpm_uart_tx_pump(struct uart_port *port);
-static void cpm_uart_init_smc(struct uart_cpm_port *pinfo);
-static void cpm_uart_init_scc(struct uart_cpm_port *pinfo);
-static void cpm_uart_initbd(struct uart_cpm_port *pinfo);
-
-/**************************************************************/
-
-#define HW_BUF_SPD_THRESHOLD 9600
-
-/*
- * Check, if transmit buffers are processed
-*/
-static unsigned int cpm_uart_tx_empty(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- cbd_t __iomem *bdp = pinfo->tx_bd_base;
- int ret = 0;
-
- while (1) {
- if (in_be16(&bdp->cbd_sc) & BD_SC_READY)
- break;
-
- if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) {
- ret = TIOCSER_TEMT;
- break;
- }
- bdp++;
- }
-
- pr_debug("CPM uart[%d]:tx_empty: %d\n", port->line, ret);
-
- return ret;
-}
-
-static void cpm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-
- if (pinfo->gpios[GPIO_RTS] >= 0)
- gpio_set_value(pinfo->gpios[GPIO_RTS], !(mctrl & TIOCM_RTS));
-
- if (pinfo->gpios[GPIO_DTR] >= 0)
- gpio_set_value(pinfo->gpios[GPIO_DTR], !(mctrl & TIOCM_DTR));
-}
-
-static unsigned int cpm_uart_get_mctrl(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- unsigned int mctrl = TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
-
- if (pinfo->gpios[GPIO_CTS] >= 0) {
- if (gpio_get_value(pinfo->gpios[GPIO_CTS]))
- mctrl &= ~TIOCM_CTS;
- }
-
- if (pinfo->gpios[GPIO_DSR] >= 0) {
- if (gpio_get_value(pinfo->gpios[GPIO_DSR]))
- mctrl &= ~TIOCM_DSR;
- }
-
- if (pinfo->gpios[GPIO_DCD] >= 0) {
- if (gpio_get_value(pinfo->gpios[GPIO_DCD]))
- mctrl &= ~TIOCM_CAR;
- }
-
- if (pinfo->gpios[GPIO_RI] >= 0) {
- if (!gpio_get_value(pinfo->gpios[GPIO_RI]))
- mctrl |= TIOCM_RNG;
- }
-
- return mctrl;
-}
-
-/*
- * Stop transmitter
- */
-static void cpm_uart_stop_tx(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- smc_t __iomem *smcp = pinfo->smcp;
- scc_t __iomem *sccp = pinfo->sccp;
-
- pr_debug("CPM uart[%d]:stop tx\n", port->line);
-
- if (IS_SMC(pinfo))
- clrbits8(&smcp->smc_smcm, SMCM_TX);
- else
- clrbits16(&sccp->scc_sccm, UART_SCCM_TX);
-}
-
-/*
- * Start transmitter
- */
-static void cpm_uart_start_tx(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- smc_t __iomem *smcp = pinfo->smcp;
- scc_t __iomem *sccp = pinfo->sccp;
-
- pr_debug("CPM uart[%d]:start tx\n", port->line);
-
- if (IS_SMC(pinfo)) {
- if (in_8(&smcp->smc_smcm) & SMCM_TX)
- return;
- } else {
- if (in_be16(&sccp->scc_sccm) & UART_SCCM_TX)
- return;
- }
-
- if (cpm_uart_tx_pump(port) != 0) {
- if (IS_SMC(pinfo)) {
- setbits8(&smcp->smc_smcm, SMCM_TX);
- } else {
- setbits16(&sccp->scc_sccm, UART_SCCM_TX);
- }
- }
-}
-
-/*
- * Stop receiver
- */
-static void cpm_uart_stop_rx(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- smc_t __iomem *smcp = pinfo->smcp;
- scc_t __iomem *sccp = pinfo->sccp;
-
- pr_debug("CPM uart[%d]:stop rx\n", port->line);
-
- if (IS_SMC(pinfo))
- clrbits8(&smcp->smc_smcm, SMCM_RX);
- else
- clrbits16(&sccp->scc_sccm, UART_SCCM_RX);
-}
-
-/*
- * Enable Modem status interrupts
- */
-static void cpm_uart_enable_ms(struct uart_port *port)
-{
- pr_debug("CPM uart[%d]:enable ms\n", port->line);
-}
-
-/*
- * Generate a break.
- */
-static void cpm_uart_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-
- pr_debug("CPM uart[%d]:break ctrl, break_state: %d\n", port->line,
- break_state);
-
- if (break_state)
- cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
- else
- cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX);
-}
-
-/*
- * Transmit characters, refill buffer descriptor, if possible
- */
-static void cpm_uart_int_tx(struct uart_port *port)
-{
- pr_debug("CPM uart[%d]:TX INT\n", port->line);
-
- cpm_uart_tx_pump(port);
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int serial_polled;
-#endif
-
-/*
- * Receive characters
- */
-static void cpm_uart_int_rx(struct uart_port *port)
-{
- int i;
- unsigned char ch;
- u8 *cp;
- struct tty_struct *tty = port->state->port.tty;
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- cbd_t __iomem *bdp;
- u16 status;
- unsigned int flg;
-
- pr_debug("CPM uart[%d]:RX INT\n", port->line);
-
- /* Just loop through the closed BDs and copy the characters into
- * the buffer.
- */
- bdp = pinfo->rx_cur;
- for (;;) {
-#ifdef CONFIG_CONSOLE_POLL
- if (unlikely(serial_polled)) {
- serial_polled = 0;
- return;
- }
-#endif
- /* get status */
- status = in_be16(&bdp->cbd_sc);
- /* If this one is empty, return happy */
- if (status & BD_SC_EMPTY)
- break;
-
- /* get number of characters, and check spce in flip-buffer */
- i = in_be16(&bdp->cbd_datlen);
-
- /* If we have not enough room in tty flip buffer, then we try
- * later, which will be the next rx-interrupt or a timeout
- */
- if(tty_buffer_request_room(tty, i) < i) {
- printk(KERN_WARNING "No room in flip buffer\n");
- return;
- }
-
- /* get pointer */
- cp = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo);
-
- /* loop through the buffer */
- while (i-- > 0) {
- ch = *cp++;
- port->icount.rx++;
- flg = TTY_NORMAL;
-
- if (status &
- (BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV))
- goto handle_error;
- if (uart_handle_sysrq_char(port, ch))
- continue;
-#ifdef CONFIG_CONSOLE_POLL
- if (unlikely(serial_polled)) {
- serial_polled = 0;
- return;
- }
-#endif
- error_return:
- tty_insert_flip_char(tty, ch, flg);
-
- } /* End while (i--) */
-
- /* This BD is ready to be used again. Clear status. get next */
- clrbits16(&bdp->cbd_sc, BD_SC_BR | BD_SC_FR | BD_SC_PR |
- BD_SC_OV | BD_SC_ID);
- setbits16(&bdp->cbd_sc, BD_SC_EMPTY);
-
- if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
- bdp = pinfo->rx_bd_base;
- else
- bdp++;
-
- } /* End for (;;) */
-
- /* Write back buffer pointer */
- pinfo->rx_cur = bdp;
-
- /* activate BH processing */
- tty_flip_buffer_push(tty);
-
- return;
-
- /* Error processing */
-
- handle_error:
- /* Statistics */
- if (status & BD_SC_BR)
- port->icount.brk++;
- if (status & BD_SC_PR)
- port->icount.parity++;
- if (status & BD_SC_FR)
- port->icount.frame++;
- if (status & BD_SC_OV)
- port->icount.overrun++;
-
- /* Mask out ignored conditions */
- status &= port->read_status_mask;
-
- /* Handle the remaining ones */
- if (status & BD_SC_BR)
- flg = TTY_BREAK;
- else if (status & BD_SC_PR)
- flg = TTY_PARITY;
- else if (status & BD_SC_FR)
- flg = TTY_FRAME;
-
- /* overrun does not affect the current character ! */
- if (status & BD_SC_OV) {
- ch = 0;
- flg = TTY_OVERRUN;
- /* We skip this buffer */
- /* CHECK: Is really nothing senseful there */
- /* ASSUMPTION: it contains nothing valid */
- i = 0;
- }
-#ifdef SUPPORT_SYSRQ
- port->sysrq = 0;
-#endif
- goto error_return;
-}
-
-/*
- * Asynchron mode interrupt handler
- */
-static irqreturn_t cpm_uart_int(int irq, void *data)
-{
- u8 events;
- struct uart_port *port = data;
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- smc_t __iomem *smcp = pinfo->smcp;
- scc_t __iomem *sccp = pinfo->sccp;
-
- pr_debug("CPM uart[%d]:IRQ\n", port->line);
-
- if (IS_SMC(pinfo)) {
- events = in_8(&smcp->smc_smce);
- out_8(&smcp->smc_smce, events);
- if (events & SMCM_BRKE)
- uart_handle_break(port);
- if (events & SMCM_RX)
- cpm_uart_int_rx(port);
- if (events & SMCM_TX)
- cpm_uart_int_tx(port);
- } else {
- events = in_be16(&sccp->scc_scce);
- out_be16(&sccp->scc_scce, events);
- if (events & UART_SCCM_BRKE)
- uart_handle_break(port);
- if (events & UART_SCCM_RX)
- cpm_uart_int_rx(port);
- if (events & UART_SCCM_TX)
- cpm_uart_int_tx(port);
- }
- return (events) ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static int cpm_uart_startup(struct uart_port *port)
-{
- int retval;
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-
- pr_debug("CPM uart[%d]:startup\n", port->line);
-
- /* If the port is not the console, make sure rx is disabled. */
- if (!(pinfo->flags & FLAG_CONSOLE)) {
- /* Disable UART rx */
- if (IS_SMC(pinfo)) {
- clrbits16(&pinfo->smcp->smc_smcmr, SMCMR_REN);
- clrbits8(&pinfo->smcp->smc_smcm, SMCM_RX);
- } else {
- clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR);
- clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX);
- }
- cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
- }
- /* Install interrupt handler. */
- retval = request_irq(port->irq, cpm_uart_int, 0, "cpm_uart", port);
- if (retval)
- return retval;
-
- /* Startup rx-int */
- if (IS_SMC(pinfo)) {
- setbits8(&pinfo->smcp->smc_smcm, SMCM_RX);
- setbits16(&pinfo->smcp->smc_smcmr, (SMCMR_REN | SMCMR_TEN));
- } else {
- setbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX);
- setbits32(&pinfo->sccp->scc_gsmrl, (SCC_GSMRL_ENR | SCC_GSMRL_ENT));
- }
-
- return 0;
-}
-
-inline void cpm_uart_wait_until_send(struct uart_cpm_port *pinfo)
-{
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(pinfo->wait_closing);
-}
-
-/*
- * Shutdown the uart
- */
-static void cpm_uart_shutdown(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-
- pr_debug("CPM uart[%d]:shutdown\n", port->line);
-
- /* free interrupt handler */
- free_irq(port->irq, port);
-
- /* If the port is not the console, disable Rx and Tx. */
- if (!(pinfo->flags & FLAG_CONSOLE)) {
- /* Wait for all the BDs marked sent */
- while(!cpm_uart_tx_empty(port)) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(2);
- }
-
- if (pinfo->wait_closing)
- cpm_uart_wait_until_send(pinfo);
-
- /* Stop uarts */
- if (IS_SMC(pinfo)) {
- smc_t __iomem *smcp = pinfo->smcp;
- clrbits16(&smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN);
- clrbits8(&smcp->smc_smcm, SMCM_RX | SMCM_TX);
- } else {
- scc_t __iomem *sccp = pinfo->sccp;
- clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
- clrbits16(&sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX);
- }
-
- /* Shut them really down and reinit buffer descriptors */
- if (IS_SMC(pinfo)) {
- out_be16(&pinfo->smcup->smc_brkcr, 0);
- cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
- } else {
- out_be16(&pinfo->sccup->scc_brkcr, 0);
- cpm_line_cr_cmd(pinfo, CPM_CR_GRA_STOP_TX);
- }
-
- cpm_uart_initbd(pinfo);
- }
-}
-
-static void cpm_uart_set_termios(struct uart_port *port,
- struct ktermios *termios,
- struct ktermios *old)
-{
- int baud;
- unsigned long flags;
- u16 cval, scval, prev_mode;
- int bits, sbits;
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- smc_t __iomem *smcp = pinfo->smcp;
- scc_t __iomem *sccp = pinfo->sccp;
-
- pr_debug("CPM uart[%d]:set_termios\n", port->line);
-
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
- if (baud <= HW_BUF_SPD_THRESHOLD ||
- (pinfo->port.state && pinfo->port.state->port.tty->low_latency))
- pinfo->rx_fifosize = 1;
- else
- pinfo->rx_fifosize = RX_BUF_SIZE;
-
- /* Character length programmed into the mode register is the
- * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
- * 1 or 2 stop bits, minus 1.
- * The value 'bits' counts this for us.
- */
- cval = 0;
- scval = 0;
-
- /* byte size */
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- bits = 5;
- break;
- case CS6:
- bits = 6;
- break;
- case CS7:
- bits = 7;
- break;
- case CS8:
- bits = 8;
- break;
- /* Never happens, but GCC is too dumb to figure it out */
- default:
- bits = 8;
- break;
- }
- sbits = bits - 5;
-
- if (termios->c_cflag & CSTOPB) {
- cval |= SMCMR_SL; /* Two stops */
- scval |= SCU_PSMR_SL;
- bits++;
- }
-
- if (termios->c_cflag & PARENB) {
- cval |= SMCMR_PEN;
- scval |= SCU_PSMR_PEN;
- bits++;
- if (!(termios->c_cflag & PARODD)) {
- cval |= SMCMR_PM_EVEN;
- scval |= (SCU_PSMR_REVP | SCU_PSMR_TEVP);
- }
- }
-
- /*
- * Update the timeout
- */
- uart_update_timeout(port, termios->c_cflag, baud);
-
- /*
- * Set up parity check flag
- */
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
- port->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
- if (termios->c_iflag & INPCK)
- port->read_status_mask |= BD_SC_FR | BD_SC_PR;
- if ((termios->c_iflag & BRKINT) || (termios->c_iflag & PARMRK))
- port->read_status_mask |= BD_SC_BR;
-
- /*
- * Characters to ignore
- */
- port->ignore_status_mask = 0;
- if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
- if (termios->c_iflag & IGNBRK) {
- port->ignore_status_mask |= BD_SC_BR;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |= BD_SC_OV;
- }
- /*
- * !!! ignore all characters if CREAD is not set
- */
- if ((termios->c_cflag & CREAD) == 0)
- port->read_status_mask &= ~BD_SC_EMPTY;
-
- spin_lock_irqsave(&port->lock, flags);
-
- /* Start bit has not been added (so don't, because we would just
- * subtract it later), and we need to add one for the number of
- * stops bits (there is always at least one).
- */
- bits++;
- if (IS_SMC(pinfo)) {
- /*
- * MRBLR can be changed while an SMC/SCC is operating only
- * if it is done in a single bus cycle with one 16-bit move
- * (not two 8-bit bus cycles back-to-back). This occurs when
- * the cp shifts control to the next RxBD, so the change does
- * not take effect immediately. To guarantee the exact RxBD
- * on which the change occurs, change MRBLR only while the
- * SMC/SCC receiver is disabled.
- */
- out_be16(&pinfo->smcup->smc_mrblr, pinfo->rx_fifosize);
-
- /* Set the mode register. We want to keep a copy of the
- * enables, because we want to put them back if they were
- * present.
- */
- prev_mode = in_be16(&smcp->smc_smcmr) & (SMCMR_REN | SMCMR_TEN);
- /* Output in *one* operation, so we don't interrupt RX/TX if they
- * were already enabled. */
- out_be16(&smcp->smc_smcmr, smcr_mk_clen(bits) | cval |
- SMCMR_SM_UART | prev_mode);
- } else {
- out_be16(&pinfo->sccup->scc_genscc.scc_mrblr, pinfo->rx_fifosize);
- out_be16(&sccp->scc_psmr, (sbits << 12) | scval);
- }
-
- if (pinfo->clk)
- clk_set_rate(pinfo->clk, baud);
- else
- cpm_set_brg(pinfo->brg - 1, baud);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *cpm_uart_type(struct uart_port *port)
-{
- pr_debug("CPM uart[%d]:uart_type\n", port->line);
-
- return port->type == PORT_CPM ? "CPM UART" : NULL;
-}
-
-/*
- * verify the new serial_struct (for TIOCSSERIAL).
- */
-static int cpm_uart_verify_port(struct uart_port *port,
- struct serial_struct *ser)
-{
- int ret = 0;
-
- pr_debug("CPM uart[%d]:verify_port\n", port->line);
-
- if (ser->type != PORT_UNKNOWN && ser->type != PORT_CPM)
- ret = -EINVAL;
- if (ser->irq < 0 || ser->irq >= nr_irqs)
- ret = -EINVAL;
- if (ser->baud_base < 9600)
- ret = -EINVAL;
- return ret;
-}
-
-/*
- * Transmit characters, refill buffer descriptor, if possible
- */
-static int cpm_uart_tx_pump(struct uart_port *port)
-{
- cbd_t __iomem *bdp;
- u8 *p;
- int count;
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- struct circ_buf *xmit = &port->state->xmit;
-
- /* Handle xon/xoff */
- if (port->x_char) {
- /* Pick next descriptor and fill from buffer */
- bdp = pinfo->tx_cur;
-
- p = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo);
-
- *p++ = port->x_char;
-
- out_be16(&bdp->cbd_datlen, 1);
- setbits16(&bdp->cbd_sc, BD_SC_READY);
- /* Get next BD. */
- if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
- bdp = pinfo->tx_bd_base;
- else
- bdp++;
- pinfo->tx_cur = bdp;
-
- port->icount.tx++;
- port->x_char = 0;
- return 1;
- }
-
- if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- cpm_uart_stop_tx(port);
- return 0;
- }
-
- /* Pick next descriptor and fill from buffer */
- bdp = pinfo->tx_cur;
-
- while (!(in_be16(&bdp->cbd_sc) & BD_SC_READY) &&
- xmit->tail != xmit->head) {
- count = 0;
- p = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo);
- while (count < pinfo->tx_fifosize) {
- *p++ = xmit->buf[xmit->tail];
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- port->icount.tx++;
- count++;
- if (xmit->head == xmit->tail)
- break;
- }
- out_be16(&bdp->cbd_datlen, count);
- setbits16(&bdp->cbd_sc, BD_SC_READY);
- /* Get next BD. */
- if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
- bdp = pinfo->tx_bd_base;
- else
- bdp++;
- }
- pinfo->tx_cur = bdp;
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
-
- if (uart_circ_empty(xmit)) {
- cpm_uart_stop_tx(port);
- return 0;
- }
-
- return 1;
-}
-
-/*
- * init buffer descriptors
- */
-static void cpm_uart_initbd(struct uart_cpm_port *pinfo)
-{
- int i;
- u8 *mem_addr;
- cbd_t __iomem *bdp;
-
- pr_debug("CPM uart[%d]:initbd\n", pinfo->port.line);
-
- /* Set the physical address of the host memory
- * buffers in the buffer descriptors, and the
- * virtual address for us to work with.
- */
- mem_addr = pinfo->mem_addr;
- bdp = pinfo->rx_cur = pinfo->rx_bd_base;
- for (i = 0; i < (pinfo->rx_nrfifos - 1); i++, bdp++) {
- out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo));
- out_be16(&bdp->cbd_sc, BD_SC_EMPTY | BD_SC_INTRPT);
- mem_addr += pinfo->rx_fifosize;
- }
-
- out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo));
- out_be16(&bdp->cbd_sc, BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT);
-
- /* Set the physical address of the host memory
- * buffers in the buffer descriptors, and the
- * virtual address for us to work with.
- */
- mem_addr = pinfo->mem_addr + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize);
- bdp = pinfo->tx_cur = pinfo->tx_bd_base;
- for (i = 0; i < (pinfo->tx_nrfifos - 1); i++, bdp++) {
- out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo));
- out_be16(&bdp->cbd_sc, BD_SC_INTRPT);
- mem_addr += pinfo->tx_fifosize;
- }
-
- out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo));
- out_be16(&bdp->cbd_sc, BD_SC_WRAP | BD_SC_INTRPT);
-}
-
-static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
-{
- scc_t __iomem *scp;
- scc_uart_t __iomem *sup;
-
- pr_debug("CPM uart[%d]:init_scc\n", pinfo->port.line);
-
- scp = pinfo->sccp;
- sup = pinfo->sccup;
-
- /* Store address */
- out_be16(&pinfo->sccup->scc_genscc.scc_rbase,
- (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);
- out_be16(&pinfo->sccup->scc_genscc.scc_tbase,
- (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
-
- cpm_set_scc_fcr(sup);
-
- out_be16(&sup->scc_genscc.scc_mrblr, pinfo->rx_fifosize);
- out_be16(&sup->scc_maxidl, pinfo->rx_fifosize);
- out_be16(&sup->scc_brkcr, 1);
- out_be16(&sup->scc_parec, 0);
- out_be16(&sup->scc_frmec, 0);
- out_be16(&sup->scc_nosec, 0);
- out_be16(&sup->scc_brkec, 0);
- out_be16(&sup->scc_uaddr1, 0);
- out_be16(&sup->scc_uaddr2, 0);
- out_be16(&sup->scc_toseq, 0);
- out_be16(&sup->scc_char1, 0x8000);
- out_be16(&sup->scc_char2, 0x8000);
- out_be16(&sup->scc_char3, 0x8000);
- out_be16(&sup->scc_char4, 0x8000);
- out_be16(&sup->scc_char5, 0x8000);
- out_be16(&sup->scc_char6, 0x8000);
- out_be16(&sup->scc_char7, 0x8000);
- out_be16(&sup->scc_char8, 0x8000);
- out_be16(&sup->scc_rccm, 0xc0ff);
-
- /* Send the CPM an initialize command.
- */
- cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- out_be32(&scp->scc_gsmrh, 0);
- out_be32(&scp->scc_gsmrl,
- SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
-
- /* Enable rx interrupts and clear all pending events. */
- out_be16(&scp->scc_sccm, 0);
- out_be16(&scp->scc_scce, 0xffff);
- out_be16(&scp->scc_dsr, 0x7e7e);
- out_be16(&scp->scc_psmr, 0x3000);
-
- setbits32(&scp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-}
-
-static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
-{
- smc_t __iomem *sp;
- smc_uart_t __iomem *up;
-
- pr_debug("CPM uart[%d]:init_smc\n", pinfo->port.line);
-
- sp = pinfo->smcp;
- up = pinfo->smcup;
-
- /* Store address */
- out_be16(&pinfo->smcup->smc_rbase,
- (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE);
- out_be16(&pinfo->smcup->smc_tbase,
- (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE);
-
-/*
- * In case SMC1 is being relocated...
- */
-#if defined (CONFIG_I2C_SPI_SMC1_UCODE_PATCH)
- out_be16(&up->smc_rbptr, in_be16(&pinfo->smcup->smc_rbase));
- out_be16(&up->smc_tbptr, in_be16(&pinfo->smcup->smc_tbase));
- out_be32(&up->smc_rstate, 0);
- out_be32(&up->smc_tstate, 0);
- out_be16(&up->smc_brkcr, 1); /* number of break chars */
- out_be16(&up->smc_brkec, 0);
-#endif
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- cpm_set_smc_fcr(up);
-
- /* Using idle character time requires some additional tuning. */
- out_be16(&up->smc_mrblr, pinfo->rx_fifosize);
- out_be16(&up->smc_maxidl, pinfo->rx_fifosize);
- out_be16(&up->smc_brklen, 0);
- out_be16(&up->smc_brkec, 0);
- out_be16(&up->smc_brkcr, 1);
-
- cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- out_be16(&sp->smc_smcmr, smcr_mk_clen(9) | SMCMR_SM_UART);
-
- /* Enable only rx interrupts clear all pending events. */
- out_8(&sp->smc_smcm, 0);
- out_8(&sp->smc_smce, 0xff);
-
- setbits16(&sp->smc_smcmr, SMCMR_REN | SMCMR_TEN);
-}
-
-/*
- * Initialize port. This is called from early_console stuff
- * so we have to be careful here !
- */
-static int cpm_uart_request_port(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- int ret;
-
- pr_debug("CPM uart[%d]:request port\n", port->line);
-
- if (pinfo->flags & FLAG_CONSOLE)
- return 0;
-
- if (IS_SMC(pinfo)) {
- clrbits8(&pinfo->smcp->smc_smcm, SMCM_RX | SMCM_TX);
- clrbits16(&pinfo->smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN);
- } else {
- clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX);
- clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
- }
-
- ret = cpm_uart_allocbuf(pinfo, 0);
-
- if (ret)
- return ret;
-
- cpm_uart_initbd(pinfo);
- if (IS_SMC(pinfo))
- cpm_uart_init_smc(pinfo);
- else
- cpm_uart_init_scc(pinfo);
-
- return 0;
-}
-
-static void cpm_uart_release_port(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-
- if (!(pinfo->flags & FLAG_CONSOLE))
- cpm_uart_freebuf(pinfo);
-}
-
-/*
- * Configure/autoconfigure the port.
- */
-static void cpm_uart_config_port(struct uart_port *port, int flags)
-{
- pr_debug("CPM uart[%d]:config_port\n", port->line);
-
- if (flags & UART_CONFIG_TYPE) {
- port->type = PORT_CPM;
- cpm_uart_request_port(port);
- }
-}
-
-#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_CPM_CONSOLE)
-/*
- * Write a string to the serial port
- * Note that this is called with interrupts already disabled
- */
-static void cpm_uart_early_write(struct uart_cpm_port *pinfo,
- const char *string, u_int count)
-{
- unsigned int i;
- cbd_t __iomem *bdp, *bdbase;
- unsigned char *cpm_outp_addr;
-
- /* Get the address of the host memory buffer.
- */
- bdp = pinfo->tx_cur;
- bdbase = pinfo->tx_bd_base;
-
- /*
- * Now, do each character. This is not as bad as it looks
- * since this is a holding FIFO and not a transmitting FIFO.
- * We could add the complexity of filling the entire transmit
- * buffer, but we would just wait longer between accesses......
- */
- for (i = 0; i < count; i++, string++) {
- /* Wait for transmitter fifo to empty.
- * Ready indicates output is ready, and xmt is doing
- * that, not that it is ready for us to send.
- */
- while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
- ;
-
- /* Send the character out.
- * If the buffer address is in the CPM DPRAM, don't
- * convert it.
- */
- cpm_outp_addr = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr),
- pinfo);
- *cpm_outp_addr = *string;
-
- out_be16(&bdp->cbd_datlen, 1);
- setbits16(&bdp->cbd_sc, BD_SC_READY);
-
- if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
- bdp = bdbase;
- else
- bdp++;
-
- /* if a LF, also do CR... */
- if (*string == 10) {
- while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
- ;
-
- cpm_outp_addr = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr),
- pinfo);
- *cpm_outp_addr = 13;
-
- out_be16(&bdp->cbd_datlen, 1);
- setbits16(&bdp->cbd_sc, BD_SC_READY);
-
- if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
- bdp = bdbase;
- else
- bdp++;
- }
- }
-
- /*
- * Finally, Wait for transmitter & holding register to empty
- * and restore the IER
- */
- while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
- ;
-
- pinfo->tx_cur = bdp;
-}
-#endif
-
-#ifdef CONFIG_CONSOLE_POLL
-/* Serial polling routines for writing and reading from the uart while
- * in an interrupt or debug context.
- */
-
-#define GDB_BUF_SIZE 512 /* power of 2, please */
-
-static char poll_buf[GDB_BUF_SIZE];
-static char *pollp;
-static int poll_chars;
-
-static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo)
-{
- u_char c, *cp;
- volatile cbd_t *bdp;
- int i;
-
- /* Get the address of the host memory buffer.
- */
- bdp = pinfo->rx_cur;
- while (bdp->cbd_sc & BD_SC_EMPTY)
- ;
-
- /* If the buffer address is in the CPM DPRAM, don't
- * convert it.
- */
- cp = cpm2cpu_addr(bdp->cbd_bufaddr, pinfo);
-
- if (obuf) {
- i = c = bdp->cbd_datlen;
- while (i-- > 0)
- *obuf++ = *cp++;
- } else
- c = *cp;
- bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID);
- bdp->cbd_sc |= BD_SC_EMPTY;
-
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = pinfo->rx_bd_base;
- else
- bdp++;
- pinfo->rx_cur = (cbd_t *)bdp;
-
- return (int)c;
-}
-
-static int cpm_get_poll_char(struct uart_port *port)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-
- if (!serial_polled) {
- serial_polled = 1;
- poll_chars = 0;
- }
- if (poll_chars <= 0) {
- poll_chars = poll_wait_key(poll_buf, pinfo);
- pollp = poll_buf;
- }
- poll_chars--;
- return *pollp++;
-}
-
-static void cpm_put_poll_char(struct uart_port *port,
- unsigned char c)
-{
- struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
- static char ch[2];
-
- ch[0] = (char)c;
- cpm_uart_early_write(pinfo, ch, 1);
-}
-#endif /* CONFIG_CONSOLE_POLL */
-
-static struct uart_ops cpm_uart_pops = {
- .tx_empty = cpm_uart_tx_empty,
- .set_mctrl = cpm_uart_set_mctrl,
- .get_mctrl = cpm_uart_get_mctrl,
- .stop_tx = cpm_uart_stop_tx,
- .start_tx = cpm_uart_start_tx,
- .stop_rx = cpm_uart_stop_rx,
- .enable_ms = cpm_uart_enable_ms,
- .break_ctl = cpm_uart_break_ctl,
- .startup = cpm_uart_startup,
- .shutdown = cpm_uart_shutdown,
- .set_termios = cpm_uart_set_termios,
- .type = cpm_uart_type,
- .release_port = cpm_uart_release_port,
- .request_port = cpm_uart_request_port,
- .config_port = cpm_uart_config_port,
- .verify_port = cpm_uart_verify_port,
-#ifdef CONFIG_CONSOLE_POLL
- .poll_get_char = cpm_get_poll_char,
- .poll_put_char = cpm_put_poll_char,
-#endif
-};
-
-struct uart_cpm_port cpm_uart_ports[UART_NR];
-
-static int cpm_uart_init_port(struct device_node *np,
- struct uart_cpm_port *pinfo)
-{
- const u32 *data;
- void __iomem *mem, *pram;
- int len;
- int ret;
- int i;
-
- data = of_get_property(np, "clock", NULL);
- if (data) {
- struct clk *clk = clk_get(NULL, (const char*)data);
- if (!IS_ERR(clk))
- pinfo->clk = clk;
- }
- if (!pinfo->clk) {
- data = of_get_property(np, "fsl,cpm-brg", &len);
- if (!data || len != 4) {
- printk(KERN_ERR "CPM UART %s has no/invalid "
- "fsl,cpm-brg property.\n", np->name);
- return -EINVAL;
- }
- pinfo->brg = *data;
- }
-
- data = of_get_property(np, "fsl,cpm-command", &len);
- if (!data || len != 4) {
- printk(KERN_ERR "CPM UART %s has no/invalid "
- "fsl,cpm-command property.\n", np->name);
- return -EINVAL;
- }
- pinfo->command = *data;
-
- mem = of_iomap(np, 0);
- if (!mem)
- return -ENOMEM;
-
- if (of_device_is_compatible(np, "fsl,cpm1-scc-uart") ||
- of_device_is_compatible(np, "fsl,cpm2-scc-uart")) {
- pinfo->sccp = mem;
- pinfo->sccup = pram = cpm_uart_map_pram(pinfo, np);
- } else if (of_device_is_compatible(np, "fsl,cpm1-smc-uart") ||
- of_device_is_compatible(np, "fsl,cpm2-smc-uart")) {
- pinfo->flags |= FLAG_SMC;
- pinfo->smcp = mem;
- pinfo->smcup = pram = cpm_uart_map_pram(pinfo, np);
- } else {
- ret = -ENODEV;
- goto out_mem;
- }
-
- if (!pram) {
- ret = -ENOMEM;
- goto out_mem;
- }
-
- pinfo->tx_nrfifos = TX_NUM_FIFO;
- pinfo->tx_fifosize = TX_BUF_SIZE;
- pinfo->rx_nrfifos = RX_NUM_FIFO;
- pinfo->rx_fifosize = RX_BUF_SIZE;
-
- pinfo->port.uartclk = ppc_proc_freq;
- pinfo->port.mapbase = (unsigned long)mem;
- pinfo->port.type = PORT_CPM;
- pinfo->port.ops = &cpm_uart_pops,
- pinfo->port.iotype = UPIO_MEM;
- pinfo->port.fifosize = pinfo->tx_nrfifos * pinfo->tx_fifosize;
- spin_lock_init(&pinfo->port.lock);
-
- pinfo->port.irq = of_irq_to_resource(np, 0, NULL);
- if (pinfo->port.irq == NO_IRQ) {
- ret = -EINVAL;
- goto out_pram;
- }
-
- for (i = 0; i < NUM_GPIOS; i++)
- pinfo->gpios[i] = of_get_gpio(np, i);
-
-#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
- udbg_putc = NULL;
-#endif
-
- return cpm_uart_request_port(&pinfo->port);
-
-out_pram:
- cpm_uart_unmap_pram(pinfo, pram);
-out_mem:
- iounmap(mem);
- return ret;
-}
-
-#ifdef CONFIG_SERIAL_CPM_CONSOLE
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- * Note that this is called with interrupts already disabled
- */
-static void cpm_uart_console_write(struct console *co, const char *s,
- u_int count)
-{
- struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
- unsigned long flags;
- int nolock = oops_in_progress;
-
- if (unlikely(nolock)) {
- local_irq_save(flags);
- } else {
- spin_lock_irqsave(&pinfo->port.lock, flags);
- }
-
- cpm_uart_early_write(pinfo, s, count);
-
- if (unlikely(nolock)) {
- local_irq_restore(flags);
- } else {
- spin_unlock_irqrestore(&pinfo->port.lock, flags);
- }
-}
-
-
-static int __init cpm_uart_console_setup(struct console *co, char *options)
-{
- int baud = 38400;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
- int ret;
- struct uart_cpm_port *pinfo;
- struct uart_port *port;
-
- struct device_node *np = NULL;
- int i = 0;
-
- if (co->index >= UART_NR) {
- printk(KERN_ERR "cpm_uart: console index %d too high\n",
- co->index);
- return -ENODEV;
- }
-
- do {
- np = of_find_node_by_type(np, "serial");
- if (!np)
- return -ENODEV;
-
- if (!of_device_is_compatible(np, "fsl,cpm1-smc-uart") &&
- !of_device_is_compatible(np, "fsl,cpm1-scc-uart") &&
- !of_device_is_compatible(np, "fsl,cpm2-smc-uart") &&
- !of_device_is_compatible(np, "fsl,cpm2-scc-uart"))
- i--;
- } while (i++ != co->index);
-
- pinfo = &cpm_uart_ports[co->index];
-
- pinfo->flags |= FLAG_CONSOLE;
- port = &pinfo->port;
-
- ret = cpm_uart_init_port(np, pinfo);
- of_node_put(np);
- if (ret)
- return ret;
-
- if (options) {
- uart_parse_options(options, &baud, &parity, &bits, &flow);
- } else {
- if ((baud = uart_baudrate()) == -1)
- baud = 9600;
- }
-
- if (IS_SMC(pinfo)) {
- out_be16(&pinfo->smcup->smc_brkcr, 0);
- cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
- clrbits8(&pinfo->smcp->smc_smcm, SMCM_RX | SMCM_TX);
- clrbits16(&pinfo->smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN);
- } else {
- out_be16(&pinfo->sccup->scc_brkcr, 0);
- cpm_line_cr_cmd(pinfo, CPM_CR_GRA_STOP_TX);
- clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX);
- clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
- }
-
- ret = cpm_uart_allocbuf(pinfo, 1);
-
- if (ret)
- return ret;
-
- cpm_uart_initbd(pinfo);
-
- if (IS_SMC(pinfo))
- cpm_uart_init_smc(pinfo);
- else
- cpm_uart_init_scc(pinfo);
-
- uart_set_options(port, co, baud, parity, bits, flow);
- cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX);
-
- return 0;
-}
-
-static struct uart_driver cpm_reg;
-static struct console cpm_scc_uart_console = {
- .name = "ttyCPM",
- .write = cpm_uart_console_write,
- .device = uart_console_device,
- .setup = cpm_uart_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &cpm_reg,
-};
-
-static int __init cpm_uart_console_init(void)
-{
- register_console(&cpm_scc_uart_console);
- return 0;
-}
-
-console_initcall(cpm_uart_console_init);
-
-#define CPM_UART_CONSOLE &cpm_scc_uart_console
-#else
-#define CPM_UART_CONSOLE NULL
-#endif
-
-static struct uart_driver cpm_reg = {
- .owner = THIS_MODULE,
- .driver_name = "ttyCPM",
- .dev_name = "ttyCPM",
- .major = SERIAL_CPM_MAJOR,
- .minor = SERIAL_CPM_MINOR,
- .cons = CPM_UART_CONSOLE,
- .nr = UART_NR,
-};
-
-static int probe_index;
-
-static int __devinit cpm_uart_probe(struct platform_device *ofdev,
- const struct of_device_id *match)
-{
- int index = probe_index++;
- struct uart_cpm_port *pinfo = &cpm_uart_ports[index];
- int ret;
-
- pinfo->port.line = index;
-
- if (index >= UART_NR)
- return -ENODEV;
-
- dev_set_drvdata(&ofdev->dev, pinfo);
-
- /* initialize the device pointer for the port */
- pinfo->port.dev = &ofdev->dev;
-
- ret = cpm_uart_init_port(ofdev->dev.of_node, pinfo);
- if (ret)
- return ret;
-
- return uart_add_one_port(&cpm_reg, &pinfo->port);
-}
-
-static int __devexit cpm_uart_remove(struct platform_device *ofdev)
-{
- struct uart_cpm_port *pinfo = dev_get_drvdata(&ofdev->dev);
- return uart_remove_one_port(&cpm_reg, &pinfo->port);
-}
-
-static struct of_device_id cpm_uart_match[] = {
- {
- .compatible = "fsl,cpm1-smc-uart",
- },
- {
- .compatible = "fsl,cpm1-scc-uart",
- },
- {
- .compatible = "fsl,cpm2-smc-uart",
- },
- {
- .compatible = "fsl,cpm2-scc-uart",
- },
- {}
-};
-
-static struct of_platform_driver cpm_uart_driver = {
- .driver = {
- .name = "cpm_uart",
- .owner = THIS_MODULE,
- .of_match_table = cpm_uart_match,
- },
- .probe = cpm_uart_probe,
- .remove = cpm_uart_remove,
- };
-
-static int __init cpm_uart_init(void)
-{
- int ret = uart_register_driver(&cpm_reg);
- if (ret)
- return ret;
-
- ret = of_register_platform_driver(&cpm_uart_driver);
- if (ret)
- uart_unregister_driver(&cpm_reg);
-
- return ret;
-}
-
-static void __exit cpm_uart_exit(void)
-{
- of_unregister_platform_driver(&cpm_uart_driver);
- uart_unregister_driver(&cpm_reg);
-}
-
-module_init(cpm_uart_init);
-module_exit(cpm_uart_exit);
-
-MODULE_AUTHOR("Kumar Gala/Antoniou Pantelis");
-MODULE_DESCRIPTION("CPM SCC/SMC port driver $Revision: 0.01 $");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_CHARDEV(SERIAL_CPM_MAJOR, SERIAL_CPM_MINOR);
git.samba.org / sfrench / cifs-2.6.git / blobdiff