drivers/serial/cpm_uart/cpm_uart_cpm2.c - arm/linux-arm64-legacy - Git at Google

 /*
  *  linux/drivers/serial/cpm_uart_cpm2.c
  *
  *  Driver for CPM (SCC/SMC) serial ports; CPM2 definitions
  *
  *  Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
  *              Pantelis Antoniou (panto@intracom.gr) (CPM1)
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
  *
  * 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/config.h>
 #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 <asm/io.h>
 #include <asm/irq.h>

 #include <linux/serial_core.h>
 #include <linux/kernel.h>

 #include "cpm_uart.h"

 /**************************************************************/

 void cpm_line_cr_cmd(int line, int cmd)
 {
 	volatile cpm_cpm2_t *cp = cpmp;
 	ulong val;

 	switch (line) {
 	case UART_SMC1:
 		val = mk_cr_cmd(CPM_CR_SMC1_PAGE, CPM_CR_SMC1_SBLOCK, 0,
 				cmd) | CPM_CR_FLG;
 		break;
 	case UART_SMC2:
 		val = mk_cr_cmd(CPM_CR_SMC2_PAGE, CPM_CR_SMC2_SBLOCK, 0,
 				cmd) | CPM_CR_FLG;
 		break;
 	case UART_SCC1:
 		val = mk_cr_cmd(CPM_CR_SCC1_PAGE, CPM_CR_SCC1_SBLOCK, 0,
 				cmd) | CPM_CR_FLG;
 		break;
 	case UART_SCC2:
 		val = mk_cr_cmd(CPM_CR_SCC2_PAGE, CPM_CR_SCC2_SBLOCK, 0,
 				cmd) | CPM_CR_FLG;
 		break;
 	case UART_SCC3:
 		val = mk_cr_cmd(CPM_CR_SCC3_PAGE, CPM_CR_SCC3_SBLOCK, 0,
 				cmd) | CPM_CR_FLG;
 		break;
 	case UART_SCC4:
 		val = mk_cr_cmd(CPM_CR_SCC4_PAGE, CPM_CR_SCC4_SBLOCK, 0,
 				cmd) | CPM_CR_FLG;
 		break;
 	default:
 		return;

 	}
 	cp->cp_cpcr = val;
 	while (cp->cp_cpcr & CPM_CR_FLG) ;
 }

 void smc1_lineif(struct uart_cpm_port *pinfo)
 {
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

 	/* SMC1 is only on port D */
 	io->iop_ppard |= 0x00c00000;
 	io->iop_pdird |= 0x00400000;
 	io->iop_pdird &= ~0x00800000;
 	io->iop_psord &= ~0x00c00000;

 	/* Wire BRG1 to SMC1 */
 	cpm2_immr->im_cpmux.cmx_smr &= 0x0f;
 	pinfo->brg = 1;
 }

 void smc2_lineif(struct uart_cpm_port *pinfo)
 {
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

 	/* SMC2 is only on port A */
 	io->iop_ppara |= 0x00c00000;
 	io->iop_pdira |= 0x00400000;
 	io->iop_pdira &= ~0x00800000;
 	io->iop_psora &= ~0x00c00000;

 	/* Wire BRG2 to SMC2 */
 	cpm2_immr->im_cpmux.cmx_smr &= 0xf0;
 	pinfo->brg = 2;
 }

 void scc1_lineif(struct uart_cpm_port *pinfo)
 {
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

 	/* Use Port D for SCC1 instead of other functions.  */
 	io->iop_ppard |= 0x00000003;
 	io->iop_psord &= ~0x00000001;	/* Rx */
 	io->iop_psord |= 0x00000002;	/* Tx */
 	io->iop_pdird &= ~0x00000001;	/* Rx */
 	io->iop_pdird |= 0x00000002;	/* Tx */

 	/* Wire BRG1 to SCC1 */
 	cpm2_immr->im_cpmux.cmx_scr &= 0x00ffffff;
 	cpm2_immr->im_cpmux.cmx_scr |= 0x00000000;
 	pinfo->brg = 1;
 }

 void scc2_lineif(struct uart_cpm_port *pinfo)
 {
 	/*
 	 * STx GP3 uses the SCC2 secondary option pin assignment
 	 * which this driver doesn't account for in the static
 	 * pin assignments. This kind of board specific info
 	 * really has to get out of the driver so boards can
 	 * be supported in a sane fashion.
 	 */
 #ifndef CONFIG_STX_GP3
 #ifdef CONFIG_MPC8560_ADS
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
 	io->iop_ppard |= 0x00000018;
 	io->iop_psord &= ~0x00000008;	/* Rx */
 	io->iop_psord &= ~0x00000010;	/* Tx */
 	io->iop_pdird &= ~0x00000008;	/* Rx */
 	io->iop_pdird |= 0x00000010;	/* Tx */
 #else
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
 	io->iop_pparb |= 0x008b0000;
 	io->iop_pdirb |= 0x00880000;
 	io->iop_psorb |= 0x00880000;
 	io->iop_pdirb &= ~0x00030000;
 	io->iop_psorb &= ~0x00030000;
 #endif
 #endif
 	cpm2_immr->im_cpmux.cmx_scr &= 0xff00ffff;
 	cpm2_immr->im_cpmux.cmx_scr |= 0x00090000;
 	pinfo->brg = 2;
 }

 void scc3_lineif(struct uart_cpm_port *pinfo)
 {
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
 	io->iop_pparb |= 0x008b0000;
 	io->iop_pdirb |= 0x00880000;
 	io->iop_psorb |= 0x00880000;
 	io->iop_pdirb &= ~0x00030000;
 	io->iop_psorb &= ~0x00030000;
 	cpm2_immr->im_cpmux.cmx_scr &= 0xffff00ff;
 	cpm2_immr->im_cpmux.cmx_scr |= 0x00001200;
 	pinfo->brg = 3;
 }

 void scc4_lineif(struct uart_cpm_port *pinfo)
 {
 	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

 	io->iop_ppard |= 0x00000600;
 	io->iop_psord &= ~0x00000600;	/* Tx/Rx */
 	io->iop_pdird &= ~0x00000200;	/* Rx */
 	io->iop_pdird |= 0x00000400;	/* Tx */

 	cpm2_immr->im_cpmux.cmx_scr &= 0xffffff00;
 	cpm2_immr->im_cpmux.cmx_scr |= 0x0000001b;
 	pinfo->brg = 4;
 }

 /*
  * Allocate DP-Ram and memory buffers. We need to allocate a transmit and
  * receive buffer descriptors from dual port ram, and a character
  * buffer area from host mem. If we are allocating for the console we need
  * to do it from bootmem
  */
 int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con)
 {
 	int dpmemsz, memsz;
 	u8 *dp_mem;
 	uint dp_offset;
 	u8 *mem_addr;
 	dma_addr_t dma_addr = 0;

 	pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line);

 	dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos);
 	dp_offset = cpm_dpalloc(dpmemsz, 8);
 	if (IS_DPERR(dp_offset)) {
 		printk(KERN_ERR
 		       "cpm_uart_cpm.c: could not allocate buffer descriptors\n");
 		return -ENOMEM;
 	}

 	dp_mem = cpm_dpram_addr(dp_offset);

 	memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) +
 	    L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize);
 	if (is_con)
 		mem_addr = alloc_bootmem(memsz);
 	else
 		mem_addr = dma_alloc_coherent(NULL, memsz, &dma_addr,
 					      GFP_KERNEL);

 	if (mem_addr == NULL) {
 		cpm_dpfree(dp_offset);
 		printk(KERN_ERR
 		       "cpm_uart_cpm.c: could not allocate coherent memory\n");
 		return -ENOMEM;
 	}

 	pinfo->dp_addr = dp_offset;
 	pinfo->mem_addr = mem_addr;
 	pinfo->dma_addr = dma_addr;

 	pinfo->rx_buf = mem_addr;
 	pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos
 						       * pinfo->rx_fifosize);

 	pinfo->rx_bd_base = (volatile cbd_t *)dp_mem;
 	pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos;

 	return 0;
 }

 void cpm_uart_freebuf(struct uart_cpm_port *pinfo)
 {
 	dma_free_coherent(NULL, L1_CACHE_ALIGN(pinfo->rx_nrfifos *
 					       pinfo->rx_fifosize) +
 			  L1_CACHE_ALIGN(pinfo->tx_nrfifos *
 					 pinfo->tx_fifosize), pinfo->mem_addr,
 			  pinfo->dma_addr);

 	cpm_dpfree(pinfo->dp_addr);
 }

 /* Setup any dynamic params in the uart desc */
 int cpm_uart_init_portdesc(void)
 {
 	pr_debug("CPM uart[-]:init portdesc\n");

 	cpm_uart_nr = 0;
 #ifdef CONFIG_SERIAL_CPM_SMC1
 	cpm_uart_ports[UART_SMC1].smcp = (smc_t *) & cpm2_immr->im_smc[0];
 	cpm_uart_ports[UART_SMC1].smcup =
 	    (smc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SMC1];
 	*(u16 *)(&cpm2_immr->im_dprambase[PROFF_SMC1_BASE]) = PROFF_SMC1;
 	cpm_uart_ports[UART_SMC1].port.mapbase =
 	    (unsigned long)&cpm2_immr->im_smc[0];
 	cpm_uart_ports[UART_SMC1].smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
 	cpm_uart_ports[UART_SMC1].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
 	cpm_uart_ports[UART_SMC1].port.uartclk = (((bd_t *) __res)->bi_intfreq);
 	cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1;
 #endif

 #ifdef CONFIG_SERIAL_CPM_SMC2
 	cpm_uart_ports[UART_SMC2].smcp = (smc_t *) & cpm2_immr->im_smc[1];
 	cpm_uart_ports[UART_SMC2].smcup =
 	    (smc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SMC2];
 	*(u16 *)(&cpm2_immr->im_dprambase[PROFF_SMC2_BASE]) = PROFF_SMC2;
 	cpm_uart_ports[UART_SMC2].port.mapbase =
 	    (unsigned long)&cpm2_immr->im_smc[1];
 	cpm_uart_ports[UART_SMC2].smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
 	cpm_uart_ports[UART_SMC2].smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
 	cpm_uart_ports[UART_SMC2].port.uartclk = (((bd_t *) __res)->bi_intfreq);
 	cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2;
 #endif

 #ifdef CONFIG_SERIAL_CPM_SCC1
 	cpm_uart_ports[UART_SCC1].sccp = (scc_t *) & cpm2_immr->im_scc[0];
 	cpm_uart_ports[UART_SCC1].sccup =
 	    (scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC1];
 	cpm_uart_ports[UART_SCC1].port.mapbase =
 	    (unsigned long)&cpm2_immr->im_scc[0];
 	cpm_uart_ports[UART_SCC1].sccp->scc_sccm &=
 	    ~(UART_SCCM_TX | UART_SCCM_RX);
 	cpm_uart_ports[UART_SCC1].sccp->scc_gsmrl &=
 	    ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 	cpm_uart_ports[UART_SCC1].port.uartclk = (((bd_t *) __res)->bi_intfreq);
 	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1;
 #endif

 #ifdef CONFIG_SERIAL_CPM_SCC2
 	cpm_uart_ports[UART_SCC2].sccp = (scc_t *) & cpm2_immr->im_scc[1];
 	cpm_uart_ports[UART_SCC2].sccup =
 	    (scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC2];
 	cpm_uart_ports[UART_SCC2].port.mapbase =
 	    (unsigned long)&cpm2_immr->im_scc[1];
 	cpm_uart_ports[UART_SCC2].sccp->scc_sccm &=
 	    ~(UART_SCCM_TX | UART_SCCM_RX);
 	cpm_uart_ports[UART_SCC2].sccp->scc_gsmrl &=
 	    ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 	cpm_uart_ports[UART_SCC2].port.uartclk = (((bd_t *) __res)->bi_intfreq);
 	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2;
 #endif

 #ifdef CONFIG_SERIAL_CPM_SCC3
 	cpm_uart_ports[UART_SCC3].sccp = (scc_t *) & cpm2_immr->im_scc[2];
 	cpm_uart_ports[UART_SCC3].sccup =
 	    (scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC3];
 	cpm_uart_ports[UART_SCC3].port.mapbase =
 	    (unsigned long)&cpm2_immr->im_scc[2];
 	cpm_uart_ports[UART_SCC3].sccp->scc_sccm &=
 	    ~(UART_SCCM_TX | UART_SCCM_RX);
 	cpm_uart_ports[UART_SCC3].sccp->scc_gsmrl &=
 	    ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 	cpm_uart_ports[UART_SCC3].port.uartclk = (((bd_t *) __res)->bi_intfreq);
 	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3;
 #endif

 #ifdef CONFIG_SERIAL_CPM_SCC4
 	cpm_uart_ports[UART_SCC4].sccp = (scc_t *) & cpm2_immr->im_scc[3];
 	cpm_uart_ports[UART_SCC4].sccup =
 	    (scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC4];
 	cpm_uart_ports[UART_SCC4].port.mapbase =
 	    (unsigned long)&cpm2_immr->im_scc[3];
 	cpm_uart_ports[UART_SCC4].sccp->scc_sccm &=
 	    ~(UART_SCCM_TX | UART_SCCM_RX);
 	cpm_uart_ports[UART_SCC4].sccp->scc_gsmrl &=
 	    ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
 	cpm_uart_ports[UART_SCC4].port.uartclk = (((bd_t *) __res)->bi_intfreq);
 	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4;
 #endif

 	return 0;
 }
	/*
	* linux/drivers/serial/cpm_uart_cpm2.c
	*
	* Driver for CPM (SCC/SMC) serial ports; CPM2 definitions
	*
	* Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
	* Pantelis Antoniou (panto@intracom.gr) (CPM1)
	*
	* Copyright (C) 2004 Freescale Semiconductor, Inc.
	* (C) 2004 Intracom, S.A.
	*
	* 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/config.h>
	#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 <asm/io.h>
	#include <asm/irq.h>

	#include <linux/serial_core.h>
	#include <linux/kernel.h>

	#include "cpm_uart.h"

	/**************************************************************/

	void cpm_line_cr_cmd(int line, int cmd)
	{
	volatile cpm_cpm2_t *cp = cpmp;
	ulong val;

	switch (line) {
	case UART_SMC1:
	val = mk_cr_cmd(CPM_CR_SMC1_PAGE, CPM_CR_SMC1_SBLOCK, 0,
	cmd) \| CPM_CR_FLG;
	break;
	case UART_SMC2:
	val = mk_cr_cmd(CPM_CR_SMC2_PAGE, CPM_CR_SMC2_SBLOCK, 0,
	cmd) \| CPM_CR_FLG;
	break;
	case UART_SCC1:
	val = mk_cr_cmd(CPM_CR_SCC1_PAGE, CPM_CR_SCC1_SBLOCK, 0,
	cmd) \| CPM_CR_FLG;
	break;
	case UART_SCC2:
	val = mk_cr_cmd(CPM_CR_SCC2_PAGE, CPM_CR_SCC2_SBLOCK, 0,
	cmd) \| CPM_CR_FLG;
	break;
	case UART_SCC3:
	val = mk_cr_cmd(CPM_CR_SCC3_PAGE, CPM_CR_SCC3_SBLOCK, 0,
	cmd) \| CPM_CR_FLG;
	break;
	case UART_SCC4:
	val = mk_cr_cmd(CPM_CR_SCC4_PAGE, CPM_CR_SCC4_SBLOCK, 0,
	cmd) \| CPM_CR_FLG;
	break;
	default:
	return;

	}
	cp->cp_cpcr = val;
	while (cp->cp_cpcr & CPM_CR_FLG) ;
	}

	void smc1_lineif(struct uart_cpm_port *pinfo)
	{
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

	/* SMC1 is only on port D */
	io->iop_ppard \|= 0x00c00000;
	io->iop_pdird \|= 0x00400000;
	io->iop_pdird &= ~0x00800000;
	io->iop_psord &= ~0x00c00000;

	/* Wire BRG1 to SMC1 */
	cpm2_immr->im_cpmux.cmx_smr &= 0x0f;
	pinfo->brg = 1;
	}

	void smc2_lineif(struct uart_cpm_port *pinfo)
	{
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

	/* SMC2 is only on port A */
	io->iop_ppara \|= 0x00c00000;
	io->iop_pdira \|= 0x00400000;
	io->iop_pdira &= ~0x00800000;
	io->iop_psora &= ~0x00c00000;

	/* Wire BRG2 to SMC2 */
	cpm2_immr->im_cpmux.cmx_smr &= 0xf0;
	pinfo->brg = 2;
	}

	void scc1_lineif(struct uart_cpm_port *pinfo)
	{
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

	/* Use Port D for SCC1 instead of other functions. */
	io->iop_ppard \|= 0x00000003;
	io->iop_psord &= ~0x00000001; /* Rx */
	io->iop_psord \|= 0x00000002; /* Tx */
	io->iop_pdird &= ~0x00000001; /* Rx */
	io->iop_pdird \|= 0x00000002; /* Tx */

	/* Wire BRG1 to SCC1 */
	cpm2_immr->im_cpmux.cmx_scr &= 0x00ffffff;
	cpm2_immr->im_cpmux.cmx_scr \|= 0x00000000;
	pinfo->brg = 1;
	}

	void scc2_lineif(struct uart_cpm_port *pinfo)
	{
	/*
	* STx GP3 uses the SCC2 secondary option pin assignment
	* which this driver doesn't account for in the static
	* pin assignments. This kind of board specific info
	* really has to get out of the driver so boards can
	* be supported in a sane fashion.
	*/
	#ifndef CONFIG_STX_GP3
	#ifdef CONFIG_MPC8560_ADS
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
	io->iop_ppard \|= 0x00000018;
	io->iop_psord &= ~0x00000008; /* Rx */
	io->iop_psord &= ~0x00000010; /* Tx */
	io->iop_pdird &= ~0x00000008; /* Rx */
	io->iop_pdird \|= 0x00000010; /* Tx */
	#else
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
	io->iop_pparb \|= 0x008b0000;
	io->iop_pdirb \|= 0x00880000;
	io->iop_psorb \|= 0x00880000;
	io->iop_pdirb &= ~0x00030000;
	io->iop_psorb &= ~0x00030000;
	#endif
	#endif
	cpm2_immr->im_cpmux.cmx_scr &= 0xff00ffff;
	cpm2_immr->im_cpmux.cmx_scr \|= 0x00090000;
	pinfo->brg = 2;
	}

	void scc3_lineif(struct uart_cpm_port *pinfo)
	{
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;
	io->iop_pparb \|= 0x008b0000;
	io->iop_pdirb \|= 0x00880000;
	io->iop_psorb \|= 0x00880000;
	io->iop_pdirb &= ~0x00030000;
	io->iop_psorb &= ~0x00030000;
	cpm2_immr->im_cpmux.cmx_scr &= 0xffff00ff;
	cpm2_immr->im_cpmux.cmx_scr \|= 0x00001200;
	pinfo->brg = 3;
	}

	void scc4_lineif(struct uart_cpm_port *pinfo)
	{
	volatile iop_cpm2_t *io = &cpm2_immr->im_ioport;

	io->iop_ppard \|= 0x00000600;
	io->iop_psord &= ~0x00000600; /* Tx/Rx */
	io->iop_pdird &= ~0x00000200; /* Rx */
	io->iop_pdird \|= 0x00000400; /* Tx */

	cpm2_immr->im_cpmux.cmx_scr &= 0xffffff00;
	cpm2_immr->im_cpmux.cmx_scr \|= 0x0000001b;
	pinfo->brg = 4;
	}

	/*
	* Allocate DP-Ram and memory buffers. We need to allocate a transmit and
	* receive buffer descriptors from dual port ram, and a character
	* buffer area from host mem. If we are allocating for the console we need
	* to do it from bootmem
	*/
	int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con)
	{
	int dpmemsz, memsz;
	u8 *dp_mem;
	uint dp_offset;
	u8 *mem_addr;
	dma_addr_t dma_addr = 0;

	pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line);

	dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos);
	dp_offset = cpm_dpalloc(dpmemsz, 8);
	if (IS_DPERR(dp_offset)) {
	printk(KERN_ERR
	"cpm_uart_cpm.c: could not allocate buffer descriptors\n");
	return -ENOMEM;
	}

	dp_mem = cpm_dpram_addr(dp_offset);

	memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) +
	L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize);
	if (is_con)
	mem_addr = alloc_bootmem(memsz);
	else
	mem_addr = dma_alloc_coherent(NULL, memsz, &dma_addr,
	GFP_KERNEL);

	if (mem_addr == NULL) {
	cpm_dpfree(dp_offset);
	printk(KERN_ERR
	"cpm_uart_cpm.c: could not allocate coherent memory\n");
	return -ENOMEM;
	}

	pinfo->dp_addr = dp_offset;
	pinfo->mem_addr = mem_addr;
	pinfo->dma_addr = dma_addr;

	pinfo->rx_buf = mem_addr;
	pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos
	* pinfo->rx_fifosize);

	pinfo->rx_bd_base = (volatile cbd_t *)dp_mem;
	pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos;

	return 0;
	}

	void cpm_uart_freebuf(struct uart_cpm_port *pinfo)
	{
	dma_free_coherent(NULL, L1_CACHE_ALIGN(pinfo->rx_nrfifos *
	pinfo->rx_fifosize) +
	L1_CACHE_ALIGN(pinfo->tx_nrfifos *
	pinfo->tx_fifosize), pinfo->mem_addr,
	pinfo->dma_addr);

	cpm_dpfree(pinfo->dp_addr);
	}

	/* Setup any dynamic params in the uart desc */
	int cpm_uart_init_portdesc(void)
	{
	pr_debug("CPM uart[-]:init portdesc\n");

	cpm_uart_nr = 0;
	#ifdef CONFIG_SERIAL_CPM_SMC1
	cpm_uart_ports[UART_SMC1].smcp = (smc_t *) & cpm2_immr->im_smc[0];
	cpm_uart_ports[UART_SMC1].smcup =
	(smc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SMC1];
	(u16 )(&cpm2_immr->im_dprambase[PROFF_SMC1_BASE]) = PROFF_SMC1;
	cpm_uart_ports[UART_SMC1].port.mapbase =
	(unsigned long)&cpm2_immr->im_smc[0];
	cpm_uart_ports[UART_SMC1].smcp->smc_smcm \|= (SMCM_RX \| SMCM_TX);
	cpm_uart_ports[UART_SMC1].smcp->smc_smcmr &= ~(SMCMR_REN \| SMCMR_TEN);
	cpm_uart_ports[UART_SMC1].port.uartclk = (((bd_t *) __res)->bi_intfreq);
	cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1;
	#endif

	#ifdef CONFIG_SERIAL_CPM_SMC2
	cpm_uart_ports[UART_SMC2].smcp = (smc_t *) & cpm2_immr->im_smc[1];
	cpm_uart_ports[UART_SMC2].smcup =
	(smc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SMC2];
	(u16 )(&cpm2_immr->im_dprambase[PROFF_SMC2_BASE]) = PROFF_SMC2;
	cpm_uart_ports[UART_SMC2].port.mapbase =
	(unsigned long)&cpm2_immr->im_smc[1];
	cpm_uart_ports[UART_SMC2].smcp->smc_smcm \|= (SMCM_RX \| SMCM_TX);
	cpm_uart_ports[UART_SMC2].smcp->smc_smcmr &= ~(SMCMR_REN \| SMCMR_TEN);
	cpm_uart_ports[UART_SMC2].port.uartclk = (((bd_t *) __res)->bi_intfreq);
	cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2;
	#endif

	#ifdef CONFIG_SERIAL_CPM_SCC1
	cpm_uart_ports[UART_SCC1].sccp = (scc_t *) & cpm2_immr->im_scc[0];
	cpm_uart_ports[UART_SCC1].sccup =
	(scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC1];
	cpm_uart_ports[UART_SCC1].port.mapbase =
	(unsigned long)&cpm2_immr->im_scc[0];
	cpm_uart_ports[UART_SCC1].sccp->scc_sccm &=
	~(UART_SCCM_TX \| UART_SCCM_RX);
	cpm_uart_ports[UART_SCC1].sccp->scc_gsmrl &=
	~(SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	cpm_uart_ports[UART_SCC1].port.uartclk = (((bd_t *) __res)->bi_intfreq);
	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1;
	#endif

	#ifdef CONFIG_SERIAL_CPM_SCC2
	cpm_uart_ports[UART_SCC2].sccp = (scc_t *) & cpm2_immr->im_scc[1];
	cpm_uart_ports[UART_SCC2].sccup =
	(scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC2];
	cpm_uart_ports[UART_SCC2].port.mapbase =
	(unsigned long)&cpm2_immr->im_scc[1];
	cpm_uart_ports[UART_SCC2].sccp->scc_sccm &=
	~(UART_SCCM_TX \| UART_SCCM_RX);
	cpm_uart_ports[UART_SCC2].sccp->scc_gsmrl &=
	~(SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	cpm_uart_ports[UART_SCC2].port.uartclk = (((bd_t *) __res)->bi_intfreq);
	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2;
	#endif

	#ifdef CONFIG_SERIAL_CPM_SCC3
	cpm_uart_ports[UART_SCC3].sccp = (scc_t *) & cpm2_immr->im_scc[2];
	cpm_uart_ports[UART_SCC3].sccup =
	(scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC3];
	cpm_uart_ports[UART_SCC3].port.mapbase =
	(unsigned long)&cpm2_immr->im_scc[2];
	cpm_uart_ports[UART_SCC3].sccp->scc_sccm &=
	~(UART_SCCM_TX \| UART_SCCM_RX);
	cpm_uart_ports[UART_SCC3].sccp->scc_gsmrl &=
	~(SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	cpm_uart_ports[UART_SCC3].port.uartclk = (((bd_t *) __res)->bi_intfreq);
	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3;
	#endif

	#ifdef CONFIG_SERIAL_CPM_SCC4
	cpm_uart_ports[UART_SCC4].sccp = (scc_t *) & cpm2_immr->im_scc[3];
	cpm_uart_ports[UART_SCC4].sccup =
	(scc_uart_t *) & cpm2_immr->im_dprambase[PROFF_SCC4];
	cpm_uart_ports[UART_SCC4].port.mapbase =
	(unsigned long)&cpm2_immr->im_scc[3];
	cpm_uart_ports[UART_SCC4].sccp->scc_sccm &=
	~(UART_SCCM_TX \| UART_SCCM_RX);
	cpm_uart_ports[UART_SCC4].sccp->scc_gsmrl &=
	~(SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	cpm_uart_ports[UART_SCC4].port.uartclk = (((bd_t *) __res)->bi_intfreq);
	cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4;
	#endif

	return 0;
	}