arch/powerpc/sysdev/cpm2.c - linux - Git at Google

 /*
  * General Purpose functions for the global management of the
  * 8260 Communication Processor Module.
  * Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
  * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
  *	2.3.99 Updates
  *
  * 2006 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  * 	Merged to arch/powerpc from arch/ppc/syslib/cpm2_common.c
  *
  * This file is licensed under the terms of the GNU General Public License
  * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied.
  */

 /*
  *
  * In addition to the individual control of the communication
  * channels, there are a few functions that globally affect the
  * communication processor.
  *
  * Buffer descriptors must be allocated from the dual ported memory
  * space.  The allocator for that is here.  When the communication
  * process is reset, we reclaim the memory available.  There is
  * currently no deallocator for this memory.
  */
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/param.h>
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of.h>

 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/mpc8260.h>
 #include <asm/page.h>
 #include <asm/cpm2.h>
 #include <asm/rheap.h>
 #include <asm/fs_pd.h>

 #include <sysdev/fsl_soc.h>

 cpm_cpm2_t __iomem *cpmp; /* Pointer to comm processor space */

 /* We allocate this here because it is used almost exclusively for
  * the communication processor devices.
  */
 cpm2_map_t __iomem *cpm2_immr;
 EXPORT_SYMBOL(cpm2_immr);

 #define CPM_MAP_SIZE	(0x40000)	/* 256k - the PQ3 reserve this amount
 					   of space for CPM as it is larger
 					   than on PQ2 */

 void __init cpm2_reset(void)
 {
 #ifdef CONFIG_PPC_85xx
 	cpm2_immr = ioremap(get_immrbase() + 0x80000, CPM_MAP_SIZE);
 #else
 	cpm2_immr = ioremap(get_immrbase(), CPM_MAP_SIZE);
 #endif

 	/* Tell everyone where the comm processor resides.
 	 */
 	cpmp = &cpm2_immr->im_cpm;

 #ifndef CONFIG_PPC_EARLY_DEBUG_CPM
 	/* Reset the CPM.
 	 */
 	cpm_command(CPM_CR_RST, 0);
 #endif
 }

 static DEFINE_SPINLOCK(cmd_lock);

 #define MAX_CR_CMD_LOOPS        10000

 int cpm_command(u32 command, u8 opcode)
 {
 	int i, ret;
 	unsigned long flags;

 	spin_lock_irqsave(&cmd_lock, flags);

 	ret = 0;
 	out_be32(&cpmp->cp_cpcr, command | opcode | CPM_CR_FLG);
 	for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
 		if ((in_be32(&cpmp->cp_cpcr) & CPM_CR_FLG) == 0)
 			goto out;

 	printk(KERN_ERR "%s(): Not able to issue CPM command\n", __func__);
 	ret = -EIO;
 out:
 	spin_unlock_irqrestore(&cmd_lock, flags);
 	return ret;
 }
 EXPORT_SYMBOL(cpm_command);

 /* Set a baud rate generator.  This needs lots of work.  There are
  * eight BRGs, which can be connected to the CPM channels or output
  * as clocks.  The BRGs are in two different block of internal
  * memory mapped space.
  * The baud rate clock is the system clock divided by something.
  * It was set up long ago during the initial boot phase and is
  * is given to us.
  * Baud rate clocks are zero-based in the driver code (as that maps
  * to port numbers).  Documentation uses 1-based numbering.
  */
 void __cpm2_setbrg(uint brg, uint rate, uint clk, int div16, int src)
 {
 	u32 __iomem *bp;
 	u32 val;

 	/* This is good enough to get SMCs running.....
 	*/
 	if (brg < 4) {
 		bp = cpm2_map_size(im_brgc1, 16);
 	} else {
 		bp = cpm2_map_size(im_brgc5, 16);
 		brg -= 4;
 	}
 	bp += brg;
 	/* Round the clock divider to the nearest integer. */
 	val = (((clk * 2 / rate) - 1) & ~1) | CPM_BRG_EN | src;
 	if (div16)
 		val |= CPM_BRG_DIV16;

 	out_be32(bp, val);
 	cpm2_unmap(bp);
 }
 EXPORT_SYMBOL(__cpm2_setbrg);

 int cpm2_clk_setup(enum cpm_clk_target target, int clock, int mode)
 {
 	int ret = 0;
 	int shift;
 	int i, bits = 0;
 	cpmux_t __iomem *im_cpmux;
 	u32 __iomem *reg;
 	u32 mask = 7;

 	u8 clk_map[][3] = {
 		{CPM_CLK_FCC1, CPM_BRG5, 0},
 		{CPM_CLK_FCC1, CPM_BRG6, 1},
 		{CPM_CLK_FCC1, CPM_BRG7, 2},
 		{CPM_CLK_FCC1, CPM_BRG8, 3},
 		{CPM_CLK_FCC1, CPM_CLK9, 4},
 		{CPM_CLK_FCC1, CPM_CLK10, 5},
 		{CPM_CLK_FCC1, CPM_CLK11, 6},
 		{CPM_CLK_FCC1, CPM_CLK12, 7},
 		{CPM_CLK_FCC2, CPM_BRG5, 0},
 		{CPM_CLK_FCC2, CPM_BRG6, 1},
 		{CPM_CLK_FCC2, CPM_BRG7, 2},
 		{CPM_CLK_FCC2, CPM_BRG8, 3},
 		{CPM_CLK_FCC2, CPM_CLK13, 4},
 		{CPM_CLK_FCC2, CPM_CLK14, 5},
 		{CPM_CLK_FCC2, CPM_CLK15, 6},
 		{CPM_CLK_FCC2, CPM_CLK16, 7},
 		{CPM_CLK_FCC3, CPM_BRG5, 0},
 		{CPM_CLK_FCC3, CPM_BRG6, 1},
 		{CPM_CLK_FCC3, CPM_BRG7, 2},
 		{CPM_CLK_FCC3, CPM_BRG8, 3},
 		{CPM_CLK_FCC3, CPM_CLK13, 4},
 		{CPM_CLK_FCC3, CPM_CLK14, 5},
 		{CPM_CLK_FCC3, CPM_CLK15, 6},
 		{CPM_CLK_FCC3, CPM_CLK16, 7},
 		{CPM_CLK_SCC1, CPM_BRG1, 0},
 		{CPM_CLK_SCC1, CPM_BRG2, 1},
 		{CPM_CLK_SCC1, CPM_BRG3, 2},
 		{CPM_CLK_SCC1, CPM_BRG4, 3},
 		{CPM_CLK_SCC1, CPM_CLK11, 4},
 		{CPM_CLK_SCC1, CPM_CLK12, 5},
 		{CPM_CLK_SCC1, CPM_CLK3, 6},
 		{CPM_CLK_SCC1, CPM_CLK4, 7},
 		{CPM_CLK_SCC2, CPM_BRG1, 0},
 		{CPM_CLK_SCC2, CPM_BRG2, 1},
 		{CPM_CLK_SCC2, CPM_BRG3, 2},
 		{CPM_CLK_SCC2, CPM_BRG4, 3},
 		{CPM_CLK_SCC2, CPM_CLK11, 4},
 		{CPM_CLK_SCC2, CPM_CLK12, 5},
 		{CPM_CLK_SCC2, CPM_CLK3, 6},
 		{CPM_CLK_SCC2, CPM_CLK4, 7},
 		{CPM_CLK_SCC3, CPM_BRG1, 0},
 		{CPM_CLK_SCC3, CPM_BRG2, 1},
 		{CPM_CLK_SCC3, CPM_BRG3, 2},
 		{CPM_CLK_SCC3, CPM_BRG4, 3},
 		{CPM_CLK_SCC3, CPM_CLK5, 4},
 		{CPM_CLK_SCC3, CPM_CLK6, 5},
 		{CPM_CLK_SCC3, CPM_CLK7, 6},
 		{CPM_CLK_SCC3, CPM_CLK8, 7},
 		{CPM_CLK_SCC4, CPM_BRG1, 0},
 		{CPM_CLK_SCC4, CPM_BRG2, 1},
 		{CPM_CLK_SCC4, CPM_BRG3, 2},
 		{CPM_CLK_SCC4, CPM_BRG4, 3},
 		{CPM_CLK_SCC4, CPM_CLK5, 4},
 		{CPM_CLK_SCC4, CPM_CLK6, 5},
 		{CPM_CLK_SCC4, CPM_CLK7, 6},
 		{CPM_CLK_SCC4, CPM_CLK8, 7},
 	};

 	im_cpmux = cpm2_map(im_cpmux);

 	switch (target) {
 	case CPM_CLK_SCC1:
 		reg = &im_cpmux->cmx_scr;
 		shift = 24;
 		break;
 	case CPM_CLK_SCC2:
 		reg = &im_cpmux->cmx_scr;
 		shift = 16;
 		break;
 	case CPM_CLK_SCC3:
 		reg = &im_cpmux->cmx_scr;
 		shift = 8;
 		break;
 	case CPM_CLK_SCC4:
 		reg = &im_cpmux->cmx_scr;
 		shift = 0;
 		break;
 	case CPM_CLK_FCC1:
 		reg = &im_cpmux->cmx_fcr;
 		shift = 24;
 		break;
 	case CPM_CLK_FCC2:
 		reg = &im_cpmux->cmx_fcr;
 		shift = 16;
 		break;
 	case CPM_CLK_FCC3:
 		reg = &im_cpmux->cmx_fcr;
 		shift = 8;
 		break;
 	default:
 		printk(KERN_ERR "cpm2_clock_setup: invalid clock target\n");
 		return -EINVAL;
 	}

 	for (i = 0; i < ARRAY_SIZE(clk_map); i++) {
 		if (clk_map[i][0] == target && clk_map[i][1] == clock) {
 			bits = clk_map[i][2];
 			break;
 		}
 	}
 	if (i == ARRAY_SIZE(clk_map))
 	    ret = -EINVAL;

 	bits <<= shift;
 	mask <<= shift;

 	if (mode == CPM_CLK_RTX) {
 		bits |= bits << 3;
 		mask |= mask << 3;
 	} else if (mode == CPM_CLK_RX) {
 		bits <<= 3;
 		mask <<= 3;
 	}

 	out_be32(reg, (in_be32(reg) & ~mask) | bits);

 	cpm2_unmap(im_cpmux);
 	return ret;
 }

 int cpm2_smc_clk_setup(enum cpm_clk_target target, int clock)
 {
 	int ret = 0;
 	int shift;
 	int i, bits = 0;
 	cpmux_t __iomem *im_cpmux;
 	u8 __iomem *reg;
 	u8 mask = 3;

 	u8 clk_map[][3] = {
 		{CPM_CLK_SMC1, CPM_BRG1, 0},
 		{CPM_CLK_SMC1, CPM_BRG7, 1},
 		{CPM_CLK_SMC1, CPM_CLK7, 2},
 		{CPM_CLK_SMC1, CPM_CLK9, 3},
 		{CPM_CLK_SMC2, CPM_BRG2, 0},
 		{CPM_CLK_SMC2, CPM_BRG8, 1},
 		{CPM_CLK_SMC2, CPM_CLK4, 2},
 		{CPM_CLK_SMC2, CPM_CLK15, 3},
 	};

 	im_cpmux = cpm2_map(im_cpmux);

 	switch (target) {
 	case CPM_CLK_SMC1:
 		reg = &im_cpmux->cmx_smr;
 		mask = 3;
 		shift = 4;
 		break;
 	case CPM_CLK_SMC2:
 		reg = &im_cpmux->cmx_smr;
 		mask = 3;
 		shift = 0;
 		break;
 	default:
 		printk(KERN_ERR "cpm2_smc_clock_setup: invalid clock target\n");
 		return -EINVAL;
 	}

 	for (i = 0; i < ARRAY_SIZE(clk_map); i++) {
 		if (clk_map[i][0] == target && clk_map[i][1] == clock) {
 			bits = clk_map[i][2];
 			break;
 		}
 	}
 	if (i == ARRAY_SIZE(clk_map))
 	    ret = -EINVAL;

 	bits <<= shift;
 	mask <<= shift;

 	out_8(reg, (in_8(reg) & ~mask) | bits);

 	cpm2_unmap(im_cpmux);
 	return ret;
 }

 struct cpm2_ioports {
 	u32 dir, par, sor, odr, dat;
 	u32 res[3];
 };

 void cpm2_set_pin(int port, int pin, int flags)
 {
 	struct cpm2_ioports __iomem *iop =
 		(struct cpm2_ioports __iomem *)&cpm2_immr->im_ioport;

 	pin = 1 << (31 - pin);

 	if (flags & CPM_PIN_OUTPUT)
 		setbits32(&iop[port].dir, pin);
 	else
 		clrbits32(&iop[port].dir, pin);

 	if (!(flags & CPM_PIN_GPIO))
 		setbits32(&iop[port].par, pin);
 	else
 		clrbits32(&iop[port].par, pin);

 	if (flags & CPM_PIN_SECONDARY)
 		setbits32(&iop[port].sor, pin);
 	else
 		clrbits32(&iop[port].sor, pin);

 	if (flags & CPM_PIN_OPENDRAIN)
 		setbits32(&iop[port].odr, pin);
 	else
 		clrbits32(&iop[port].odr, pin);
 }
	/*
	* General Purpose functions for the global management of the
	* 8260 Communication Processor Module.
	* Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
	* Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
	* 2.3.99 Updates
	*
	* 2006 (c) MontaVista Software, Inc.
	* Vitaly Bordug <vbordug@ru.mvista.com>
	* Merged to arch/powerpc from arch/ppc/syslib/cpm2_common.c
	*
	* This file is licensed under the terms of the GNU General Public License
	* version 2. This program is licensed "as is" without any warranty of any
	* kind, whether express or implied.
	*/

	/*
	*
	* In addition to the individual control of the communication
	* channels, there are a few functions that globally affect the
	* communication processor.
	*
	* Buffer descriptors must be allocated from the dual ported memory
	* space. The allocator for that is here. When the communication
	* process is reset, we reclaim the memory available. There is
	* currently no deallocator for this memory.
	*/
	#include <linux/errno.h>
	#include <linux/sched.h>
	#include <linux/kernel.h>
	#include <linux/param.h>
	#include <linux/string.h>
	#include <linux/mm.h>
	#include <linux/interrupt.h>
	#include <linux/module.h>
	#include <linux/of.h>

	#include <asm/io.h>
	#include <asm/irq.h>
	#include <asm/mpc8260.h>
	#include <asm/page.h>
	#include <asm/cpm2.h>
	#include <asm/rheap.h>
	#include <asm/fs_pd.h>

	#include <sysdev/fsl_soc.h>

	cpm_cpm2_t __iomem cpmp; / Pointer to comm processor space */

	/* We allocate this here because it is used almost exclusively for
	* the communication processor devices.
	*/
	cpm2_map_t __iomem *cpm2_immr;
	EXPORT_SYMBOL(cpm2_immr);

	#define CPM_MAP_SIZE (0x40000) /* 256k - the PQ3 reserve this amount
	of space for CPM as it is larger
	than on PQ2 */

	void __init cpm2_reset(void)
	{
	#ifdef CONFIG_PPC_85xx
	cpm2_immr = ioremap(get_immrbase() + 0x80000, CPM_MAP_SIZE);
	#else
	cpm2_immr = ioremap(get_immrbase(), CPM_MAP_SIZE);
	#endif

	/* Tell everyone where the comm processor resides.
	*/
	cpmp = &cpm2_immr->im_cpm;

	#ifndef CONFIG_PPC_EARLY_DEBUG_CPM
	/* Reset the CPM.
	*/
	cpm_command(CPM_CR_RST, 0);
	#endif
	}

	static DEFINE_SPINLOCK(cmd_lock);

	#define MAX_CR_CMD_LOOPS 10000

	int cpm_command(u32 command, u8 opcode)
	{
	int i, ret;
	unsigned long flags;

	spin_lock_irqsave(&cmd_lock, flags);

	ret = 0;
	out_be32(&cpmp->cp_cpcr, command \| opcode \| CPM_CR_FLG);
	for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
	if ((in_be32(&cpmp->cp_cpcr) & CPM_CR_FLG) == 0)
	goto out;

	printk(KERN_ERR "%s(): Not able to issue CPM command\n", __func__);
	ret = -EIO;
	out:
	spin_unlock_irqrestore(&cmd_lock, flags);
	return ret;
	}
	EXPORT_SYMBOL(cpm_command);

	/* Set a baud rate generator. This needs lots of work. There are
	* eight BRGs, which can be connected to the CPM channels or output
	* as clocks. The BRGs are in two different block of internal
	* memory mapped space.
	* The baud rate clock is the system clock divided by something.
	* It was set up long ago during the initial boot phase and is
	* is given to us.
	* Baud rate clocks are zero-based in the driver code (as that maps
	* to port numbers). Documentation uses 1-based numbering.
	*/
	void __cpm2_setbrg(uint brg, uint rate, uint clk, int div16, int src)
	{
	u32 __iomem *bp;
	u32 val;

	/* This is good enough to get SMCs running.....
	*/
	if (brg < 4) {
	bp = cpm2_map_size(im_brgc1, 16);
	} else {
	bp = cpm2_map_size(im_brgc5, 16);
	brg -= 4;
	}
	bp += brg;
	/* Round the clock divider to the nearest integer. */
	val = (((clk * 2 / rate) - 1) & ~1) \| CPM_BRG_EN \| src;
	if (div16)
	val \|= CPM_BRG_DIV16;

	out_be32(bp, val);
	cpm2_unmap(bp);
	}
	EXPORT_SYMBOL(__cpm2_setbrg);

	int cpm2_clk_setup(enum cpm_clk_target target, int clock, int mode)
	{
	int ret = 0;
	int shift;
	int i, bits = 0;
	cpmux_t __iomem *im_cpmux;
	u32 __iomem *reg;
	u32 mask = 7;

	u8 clk_map[][3] = {
	{CPM_CLK_FCC1, CPM_BRG5, 0},
	{CPM_CLK_FCC1, CPM_BRG6, 1},
	{CPM_CLK_FCC1, CPM_BRG7, 2},
	{CPM_CLK_FCC1, CPM_BRG8, 3},
	{CPM_CLK_FCC1, CPM_CLK9, 4},
	{CPM_CLK_FCC1, CPM_CLK10, 5},
	{CPM_CLK_FCC1, CPM_CLK11, 6},
	{CPM_CLK_FCC1, CPM_CLK12, 7},
	{CPM_CLK_FCC2, CPM_BRG5, 0},
	{CPM_CLK_FCC2, CPM_BRG6, 1},
	{CPM_CLK_FCC2, CPM_BRG7, 2},
	{CPM_CLK_FCC2, CPM_BRG8, 3},
	{CPM_CLK_FCC2, CPM_CLK13, 4},
	{CPM_CLK_FCC2, CPM_CLK14, 5},
	{CPM_CLK_FCC2, CPM_CLK15, 6},
	{CPM_CLK_FCC2, CPM_CLK16, 7},
	{CPM_CLK_FCC3, CPM_BRG5, 0},
	{CPM_CLK_FCC3, CPM_BRG6, 1},
	{CPM_CLK_FCC3, CPM_BRG7, 2},
	{CPM_CLK_FCC3, CPM_BRG8, 3},
	{CPM_CLK_FCC3, CPM_CLK13, 4},
	{CPM_CLK_FCC3, CPM_CLK14, 5},
	{CPM_CLK_FCC3, CPM_CLK15, 6},
	{CPM_CLK_FCC3, CPM_CLK16, 7},
	{CPM_CLK_SCC1, CPM_BRG1, 0},
	{CPM_CLK_SCC1, CPM_BRG2, 1},
	{CPM_CLK_SCC1, CPM_BRG3, 2},
	{CPM_CLK_SCC1, CPM_BRG4, 3},
	{CPM_CLK_SCC1, CPM_CLK11, 4},
	{CPM_CLK_SCC1, CPM_CLK12, 5},
	{CPM_CLK_SCC1, CPM_CLK3, 6},
	{CPM_CLK_SCC1, CPM_CLK4, 7},
	{CPM_CLK_SCC2, CPM_BRG1, 0},
	{CPM_CLK_SCC2, CPM_BRG2, 1},
	{CPM_CLK_SCC2, CPM_BRG3, 2},
	{CPM_CLK_SCC2, CPM_BRG4, 3},
	{CPM_CLK_SCC2, CPM_CLK11, 4},
	{CPM_CLK_SCC2, CPM_CLK12, 5},
	{CPM_CLK_SCC2, CPM_CLK3, 6},
	{CPM_CLK_SCC2, CPM_CLK4, 7},
	{CPM_CLK_SCC3, CPM_BRG1, 0},
	{CPM_CLK_SCC3, CPM_BRG2, 1},
	{CPM_CLK_SCC3, CPM_BRG3, 2},
	{CPM_CLK_SCC3, CPM_BRG4, 3},
	{CPM_CLK_SCC3, CPM_CLK5, 4},
	{CPM_CLK_SCC3, CPM_CLK6, 5},
	{CPM_CLK_SCC3, CPM_CLK7, 6},
	{CPM_CLK_SCC3, CPM_CLK8, 7},
	{CPM_CLK_SCC4, CPM_BRG1, 0},
	{CPM_CLK_SCC4, CPM_BRG2, 1},
	{CPM_CLK_SCC4, CPM_BRG3, 2},
	{CPM_CLK_SCC4, CPM_BRG4, 3},
	{CPM_CLK_SCC4, CPM_CLK5, 4},
	{CPM_CLK_SCC4, CPM_CLK6, 5},
	{CPM_CLK_SCC4, CPM_CLK7, 6},
	{CPM_CLK_SCC4, CPM_CLK8, 7},
	};

	im_cpmux = cpm2_map(im_cpmux);

	switch (target) {
	case CPM_CLK_SCC1:
	reg = &im_cpmux->cmx_scr;
	shift = 24;
	break;
	case CPM_CLK_SCC2:
	reg = &im_cpmux->cmx_scr;
	shift = 16;
	break;
	case CPM_CLK_SCC3:
	reg = &im_cpmux->cmx_scr;
	shift = 8;
	break;
	case CPM_CLK_SCC4:
	reg = &im_cpmux->cmx_scr;
	shift = 0;
	break;
	case CPM_CLK_FCC1:
	reg = &im_cpmux->cmx_fcr;
	shift = 24;
	break;
	case CPM_CLK_FCC2:
	reg = &im_cpmux->cmx_fcr;
	shift = 16;
	break;
	case CPM_CLK_FCC3:
	reg = &im_cpmux->cmx_fcr;
	shift = 8;
	break;
	default:
	printk(KERN_ERR "cpm2_clock_setup: invalid clock target\n");
	return -EINVAL;
	}

	for (i = 0; i < ARRAY_SIZE(clk_map); i++) {
	if (clk_map[i][0] == target && clk_map[i][1] == clock) {
	bits = clk_map[i][2];
	break;
	}
	}
	if (i == ARRAY_SIZE(clk_map))
	ret = -EINVAL;

	bits <<= shift;
	mask <<= shift;

	if (mode == CPM_CLK_RTX) {
	bits \|= bits << 3;
	mask \|= mask << 3;
	} else if (mode == CPM_CLK_RX) {
	bits <<= 3;
	mask <<= 3;
	}

	out_be32(reg, (in_be32(reg) & ~mask) \| bits);

	cpm2_unmap(im_cpmux);
	return ret;
	}

	int cpm2_smc_clk_setup(enum cpm_clk_target target, int clock)
	{
	int ret = 0;
	int shift;
	int i, bits = 0;
	cpmux_t __iomem *im_cpmux;
	u8 __iomem *reg;
	u8 mask = 3;

	u8 clk_map[][3] = {
	{CPM_CLK_SMC1, CPM_BRG1, 0},
	{CPM_CLK_SMC1, CPM_BRG7, 1},
	{CPM_CLK_SMC1, CPM_CLK7, 2},
	{CPM_CLK_SMC1, CPM_CLK9, 3},
	{CPM_CLK_SMC2, CPM_BRG2, 0},
	{CPM_CLK_SMC2, CPM_BRG8, 1},
	{CPM_CLK_SMC2, CPM_CLK4, 2},
	{CPM_CLK_SMC2, CPM_CLK15, 3},
	};

	im_cpmux = cpm2_map(im_cpmux);

	switch (target) {
	case CPM_CLK_SMC1:
	reg = &im_cpmux->cmx_smr;
	mask = 3;
	shift = 4;
	break;
	case CPM_CLK_SMC2:
	reg = &im_cpmux->cmx_smr;
	mask = 3;
	shift = 0;
	break;
	default:
	printk(KERN_ERR "cpm2_smc_clock_setup: invalid clock target\n");
	return -EINVAL;
	}

	for (i = 0; i < ARRAY_SIZE(clk_map); i++) {
	if (clk_map[i][0] == target && clk_map[i][1] == clock) {
	bits = clk_map[i][2];
	break;
	}
	}
	if (i == ARRAY_SIZE(clk_map))
	ret = -EINVAL;

	bits <<= shift;
	mask <<= shift;

	out_8(reg, (in_8(reg) & ~mask) \| bits);

	cpm2_unmap(im_cpmux);
	return ret;
	}

	struct cpm2_ioports {
	u32 dir, par, sor, odr, dat;
	u32 res[3];
	};

	void cpm2_set_pin(int port, int pin, int flags)
	{
	struct cpm2_ioports __iomem *iop =
	(struct cpm2_ioports __iomem *)&cpm2_immr->im_ioport;

	pin = 1 << (31 - pin);

	if (flags & CPM_PIN_OUTPUT)
	setbits32(&iop[port].dir, pin);
	else
	clrbits32(&iop[port].dir, pin);

	if (!(flags & CPM_PIN_GPIO))
	setbits32(&iop[port].par, pin);
	else
	clrbits32(&iop[port].par, pin);

	if (flags & CPM_PIN_SECONDARY)
	setbits32(&iop[port].sor, pin);
	else
	clrbits32(&iop[port].sor, pin);

	if (flags & CPM_PIN_OPENDRAIN)
	setbits32(&iop[port].odr, pin);
	else
	clrbits32(&iop[port].odr, pin);
	}