Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: serial: cpm_uart: implement the cpm_uart_early_write() function for console poll
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Коммит
59e7648644
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@ -930,6 +930,83 @@ static void cpm_uart_config_port(struct uart_port *port, int flags)
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}
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}
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#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_CPM_CONSOLE)
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/*
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* Write a string to the serial port
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* Note that this is called with interrupts already disabled
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*/
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static void cpm_uart_early_write(struct uart_cpm_port *pinfo,
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const char *string, u_int count)
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{
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unsigned int i;
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cbd_t __iomem *bdp, *bdbase;
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unsigned char *cpm_outp_addr;
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/* Get the address of the host memory buffer.
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*/
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bdp = pinfo->tx_cur;
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bdbase = pinfo->tx_bd_base;
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/*
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* Now, do each character. This is not as bad as it looks
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* since this is a holding FIFO and not a transmitting FIFO.
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* We could add the complexity of filling the entire transmit
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* buffer, but we would just wait longer between accesses......
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*/
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for (i = 0; i < count; i++, string++) {
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/* Wait for transmitter fifo to empty.
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* Ready indicates output is ready, and xmt is doing
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* that, not that it is ready for us to send.
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*/
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while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
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;
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/* Send the character out.
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* If the buffer address is in the CPM DPRAM, don't
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* convert it.
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*/
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cpm_outp_addr = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr),
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pinfo);
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*cpm_outp_addr = *string;
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out_be16(&bdp->cbd_datlen, 1);
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setbits16(&bdp->cbd_sc, BD_SC_READY);
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if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
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bdp = bdbase;
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else
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bdp++;
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/* if a LF, also do CR... */
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if (*string == 10) {
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while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
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;
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cpm_outp_addr = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr),
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pinfo);
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*cpm_outp_addr = 13;
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out_be16(&bdp->cbd_datlen, 1);
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setbits16(&bdp->cbd_sc, BD_SC_READY);
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if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
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bdp = bdbase;
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else
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bdp++;
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}
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}
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/*
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* Finally, Wait for transmitter & holding register to empty
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* and restore the IER
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*/
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while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
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;
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pinfo->tx_cur = bdp;
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}
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#endif
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#ifdef CONFIG_CONSOLE_POLL
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/* Serial polling routines for writing and reading from the uart while
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* in an interrupt or debug context.
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@ -999,7 +1076,7 @@ static void cpm_put_poll_char(struct uart_port *port,
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static char ch[2];
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ch[0] = (char)c;
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cpm_uart_early_write(pinfo->port.line, ch, 1);
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cpm_uart_early_write(pinfo, ch, 1);
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}
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#endif /* CONFIG_CONSOLE_POLL */
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@ -1130,9 +1207,6 @@ static void cpm_uart_console_write(struct console *co, const char *s,
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u_int count)
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{
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struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
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unsigned int i;
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cbd_t __iomem *bdp, *bdbase;
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unsigned char *cp;
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unsigned long flags;
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int nolock = oops_in_progress;
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@ -1142,66 +1216,7 @@ static void cpm_uart_console_write(struct console *co, const char *s,
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spin_lock_irqsave(&pinfo->port.lock, flags);
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}
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/* Get the address of the host memory buffer.
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*/
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bdp = pinfo->tx_cur;
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bdbase = pinfo->tx_bd_base;
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/*
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* Now, do each character. This is not as bad as it looks
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* since this is a holding FIFO and not a transmitting FIFO.
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* We could add the complexity of filling the entire transmit
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* buffer, but we would just wait longer between accesses......
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*/
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for (i = 0; i < count; i++, s++) {
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/* Wait for transmitter fifo to empty.
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* Ready indicates output is ready, and xmt is doing
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* that, not that it is ready for us to send.
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*/
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while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
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;
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/* Send the character out.
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* If the buffer address is in the CPM DPRAM, don't
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* convert it.
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*/
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cp = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo);
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*cp = *s;
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out_be16(&bdp->cbd_datlen, 1);
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setbits16(&bdp->cbd_sc, BD_SC_READY);
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if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
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bdp = bdbase;
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else
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bdp++;
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/* if a LF, also do CR... */
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if (*s == 10) {
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while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
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;
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cp = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo);
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*cp = 13;
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out_be16(&bdp->cbd_datlen, 1);
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setbits16(&bdp->cbd_sc, BD_SC_READY);
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if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP)
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bdp = bdbase;
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else
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bdp++;
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}
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}
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/*
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* Finally, Wait for transmitter & holding register to empty
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* and restore the IER
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*/
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while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
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;
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pinfo->tx_cur = bdp;
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cpm_uart_early_write(pinfo, s, count);
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if (unlikely(nolock)) {
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local_irq_restore(flags);
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