/*
   * Renesas USB driver
   *
   * Copyright (C) 2011 Renesas Solutions Corp.
   * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   *
   * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   *
   */
  #include <linux/delay.h>

  #include <linux/slab.h>

  #include "common.h"
  #include "pipe.h"

  
  /*
   *		macros
   */

  #define usbhsp_addr_offset(p)	((usbhs_pipe_number(p) - 1) * 2)

  #define usbhsp_flags_set(p, f)	((p)->flags |=  USBHS_PIPE_FLAGS_##f)
  #define usbhsp_flags_clr(p, f)	((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
  #define usbhsp_flags_has(p, f)	((p)->flags &   USBHS_PIPE_FLAGS_##f)
  #define usbhsp_flags_init(p)	do {(p)->flags = 0; } while (0)

  /*
   * for debug
   */
  static char *usbhsp_pipe_name[] = {
  	[USB_ENDPOINT_XFER_CONTROL]	= "DCP",
  	[USB_ENDPOINT_XFER_BULK]	= "BULK",
  	[USB_ENDPOINT_XFER_INT]		= "INT",
  	[USB_ENDPOINT_XFER_ISOC]	= "ISO",
  };

  char *usbhs_pipe_name(struct usbhs_pipe *pipe)
  {
  	return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
  }

  /*

   *		DCPCTR/PIPEnCTR functions
   */
  static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

  	int offset = usbhsp_addr_offset(pipe);

  	if (usbhs_pipe_is_dcp(pipe))

  		usbhs_bset(priv, DCPCTR, mask, val);
  	else
  		usbhs_bset(priv, PIPEnCTR + offset, mask, val);
  }
  
  static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

  	int offset = usbhsp_addr_offset(pipe);

  	if (usbhs_pipe_is_dcp(pipe))

  		return usbhs_read(priv, DCPCTR);
  	else
  		return usbhs_read(priv, PIPEnCTR + offset);
  }
  
  /*
   *		DCP/PIPE functions
   */
  static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
  				  u16 dcp_reg, u16 pipe_reg,
  				  u16 mask, u16 val)
  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

  	if (usbhs_pipe_is_dcp(pipe))

  		usbhs_bset(priv, dcp_reg, mask, val);
  	else
  		usbhs_bset(priv, pipe_reg, mask, val);
  }

  /*
   *		DCPCFG/PIPECFG functions
   */
  static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  {
  	__usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
  }
  
  /*

   *		PIPEnTRN/PIPEnTRE functions
   */
  static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  {
  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  	struct device *dev = usbhs_priv_to_dev(priv);
  	int num = usbhs_pipe_number(pipe);
  	u16 reg;
  
  	/*
  	 * It is impossible to calculate address,
  	 * since PIPEnTRN addresses were mapped randomly.
  	 */
  #define CASE_PIPExTRN(a)		\
  	case 0x ## a:			\
  		reg = PIPE ## a ## TRN;	\
  		break;
  
  	switch (num) {
  	CASE_PIPExTRN(1);
  	CASE_PIPExTRN(2);
  	CASE_PIPExTRN(3);
  	CASE_PIPExTRN(4);
  	CASE_PIPExTRN(5);
  	CASE_PIPExTRN(B);
  	CASE_PIPExTRN(C);
  	CASE_PIPExTRN(D);
  	CASE_PIPExTRN(E);
  	CASE_PIPExTRN(F);
  	CASE_PIPExTRN(9);
  	CASE_PIPExTRN(A);
  	default:
  		dev_err(dev, "unknown pipe (%d)
  ", num);
  		return;
  	}
  	__usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
  }
  
  static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  {
  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  	struct device *dev = usbhs_priv_to_dev(priv);
  	int num = usbhs_pipe_number(pipe);
  	u16 reg;
  
  	/*
  	 * It is impossible to calculate address,
  	 * since PIPEnTRE addresses were mapped randomly.
  	 */
  #define CASE_PIPExTRE(a)			\
  	case 0x ## a:				\
  		reg = PIPE ## a ## TRE;		\
  		break;
  
  	switch (num) {
  	CASE_PIPExTRE(1);
  	CASE_PIPExTRE(2);
  	CASE_PIPExTRE(3);
  	CASE_PIPExTRE(4);
  	CASE_PIPExTRE(5);
  	CASE_PIPExTRE(B);
  	CASE_PIPExTRE(C);
  	CASE_PIPExTRE(D);
  	CASE_PIPExTRE(E);
  	CASE_PIPExTRE(F);
  	CASE_PIPExTRE(9);
  	CASE_PIPExTRE(A);
  	default:
  		dev_err(dev, "unknown pipe (%d)
  ", num);
  		return;
  	}
  
  	__usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
  }
  
  /*

   *		PIPEBUF
   */
  static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  {

  	if (usbhs_pipe_is_dcp(pipe))

  		return;
  
  	__usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
  }
  
  /*
   *		DCPMAXP/PIPEMAXP
   */
  static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  {
  	__usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
  }

  /*
   *		pipe control functions
   */
  static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

  
  	/*
  	 * On pipe, this is necessary before
  	 * accesses to below registers.
  	 *
  	 * PIPESEL	: usbhsp_pipe_select
  	 * PIPECFG	: usbhsp_pipe_cfg_xxx
  	 * PIPEBUF	: usbhsp_pipe_buf_xxx
  	 * PIPEMAXP	: usbhsp_pipe_maxp_xxx
  	 * PIPEPERI
  	 */
  
  	/*
  	 * if pipe is dcp, no pipe is selected.
  	 * it is no problem, because dcp have its register
  	 */
  	usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
  }
  
  static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

  	int timeout = 1024;
  	u16 val;
  
  	/*
  	 * make sure....
  	 *
  	 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
  	 * specified by the CURPIPE bits.
  	 * When changing the setting of this bit after changing
  	 * the PID bits for the selected pipe from BUF to NAK,
  	 * check that CSSTS = 0 and PBUSY = 0.
  	 */
  
  	/*
  	 * CURPIPE bit = 0
  	 *
  	 * see also
  	 *  "Operation"
  	 *  - "Pipe Control"
  	 *   - "Pipe Control Registers Switching Procedure"
  	 */
  	usbhs_write(priv, CFIFOSEL, 0);

  	usbhs_pipe_disable(pipe);

  
  	do {
  		val  = usbhsp_pipectrl_get(pipe);
  		val &= CSSTS | PID_MASK;
  		if (!val)
  			return 0;
  
  		udelay(10);
  
  	} while (timeout--);

  	return -EBUSY;
  }

  int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)

  {
  	u16 val;
  
  	val = usbhsp_pipectrl_get(pipe);
  	if (val & BSTS)
  		return 0;
  
  	return -EBUSY;
  }
  
  /*
   *		PID ctrl
   */
  static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
  {
  	u16 pid = usbhsp_pipectrl_get(pipe);
  
  	pid &= PID_MASK;
  
  	/*
  	 * see
  	 * "Pipe n Control Register" - "PID"
  	 */
  	switch (pid) {
  	case PID_STALL11:
  		usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
  		/* fall-through */
  	case PID_STALL10:
  		usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
  	}
  }

  void usbhs_pipe_disable(struct usbhs_pipe *pipe)

  {

  	int timeout = 1024;
  	u16 val;

  	/* see "Pipe n Control Register" - "PID" */
  	__usbhsp_pid_try_nak_if_stall(pipe);
  
  	usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);

  
  	do {
  		val  = usbhsp_pipectrl_get(pipe);
  		val &= PBUSY;
  		if (!val)
  			break;
  
  		udelay(10);
  	} while (timeout--);

  }

  void usbhs_pipe_enable(struct usbhs_pipe *pipe)

  {
  	/* see "Pipe n Control Register" - "PID" */
  	__usbhsp_pid_try_nak_if_stall(pipe);
  
  	usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
  }

  void usbhs_pipe_stall(struct usbhs_pipe *pipe)

  {
  	u16 pid = usbhsp_pipectrl_get(pipe);
  
  	pid &= PID_MASK;
  
  	/*
  	 * see
  	 * "Pipe n Control Register" - "PID"
  	 */
  	switch (pid) {
  	case PID_NAK:
  		usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
  		break;
  	case PID_BUF:
  		usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
  		break;
  	}
  }

  int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
  {
  	u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
  
  	return (int)(pid == PID_STALL10 || pid == PID_STALL11);
  }

  void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
  {
  	if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
  		return;
  
  	/*
  	 * clear and disable transfer counter for IN/OUT pipe
  	 */
  	usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
  
  	/*
  	 * Only IN direction bulk pipe can use transfer count.
  	 * Without using this function,
  	 * received data will break if it was large data size.
  	 * see PIPEnTRN/PIPEnTRE for detail
  	 */
  	if (usbhs_pipe_is_dir_in(pipe)) {
  		int maxp = usbhs_pipe_get_maxpacket(pipe);
  
  		usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
  		usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
  	}
  }

  /*

   *		pipe setup
   */
  static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
  {
  	/*
  	 * only ISO / BULK pipe can use double buffer
  	 */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
  	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))

  		return 1;
  
  	return 0;
  }
  
  static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,

  				int is_host,
  				int dir_in)

  {
  	u16 type = 0;
  	u16 bfre = 0;
  	u16 dblb = 0;
  	u16 cntmd = 0;
  	u16 dir = 0;
  	u16 epnum = 0;
  	u16 shtnak = 0;
  	u16 type_array[] = {
  		[USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
  		[USB_ENDPOINT_XFER_INT]  = TYPE_INT,
  		[USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
  	};
  	int is_double = usbhsp_possible_double_buffer(pipe);

  	if (usbhs_pipe_is_dcp(pipe))

  		return -EINVAL;
  
  	/*
  	 * PIPECFG
  	 *
  	 * see
  	 *  - "Register Descriptions" - "PIPECFG" register
  	 *  - "Features"  - "Pipe configuration"
  	 *  - "Operation" - "Pipe Control"
  	 */
  
  	/* TYPE */

  	type = type_array[usbhs_pipe_type(pipe)];

  
  	/* BFRE */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
  	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))

  		bfre = 0; /* FIXME */
  
  	/* DBLB */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
  	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))

  		dblb = (is_double) ? DBLB : 0;
  
  	/* CNTMD */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))

  		cntmd = 0; /* FIXME */
  
  	/* DIR */

  	if (dir_in)

  		usbhsp_flags_set(pipe, IS_DIR_HOST);

  	if (!!is_host ^ !!dir_in)

  		dir |= DIR_OUT;

  	if (!dir)
  		usbhsp_flags_set(pipe, IS_DIR_IN);

  	/* SHTNAK */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&

  	    !dir)
  		shtnak = SHTNAK;
  
  	/* EPNUM */

  	epnum = 0; /* see usbhs_pipe_config_update() */

  
  	return	type	|
  		bfre	|
  		dblb	|
  		cntmd	|
  		dir	|
  		shtnak	|
  		epnum;
  }

  static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)

  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

  	struct device *dev = usbhs_priv_to_dev(priv);
  	int pipe_num = usbhs_pipe_number(pipe);
  	int is_double = usbhsp_possible_double_buffer(pipe);
  	u16 buff_size;
  	u16 bufnmb;
  	u16 bufnmb_cnt;
  
  	/*
  	 * PIPEBUF
  	 *
  	 * see
  	 *  - "Register Descriptions" - "PIPEBUF" register
  	 *  - "Features"  - "Pipe configuration"
  	 *  - "Operation" - "FIFO Buffer Memory"
  	 *  - "Operation" - "Pipe Control"
  	 *
  	 * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
  	 *
  	 * BUFNMB:	PIPE
  	 * 0:		pipe0 (DCP 256byte)
  	 * 1:		-
  	 * 2:		-
  	 * 3:		-
  	 * 4:		pipe6 (INT 64byte)
  	 * 5:		pipe7 (INT 64byte)
  	 * 6:		pipe8 (INT 64byte)
  	 * 7:		pipe9 (INT 64byte)
  	 * 8 - xx:	free (for BULK, ISOC)
  	 */
  
  	/*
  	 * FIXME
  	 *
  	 * it doesn't have good buffer allocator
  	 *
  	 * DCP : 256 byte
  	 * BULK: 512 byte
  	 * INT :  64 byte
  	 * ISOC: 512 byte
  	 */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))

  		buff_size = 256;

  	else if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))

  		buff_size = 64;
  	else
  		buff_size = 512;
  
  	/* change buff_size to register value */
  	bufnmb_cnt = (buff_size / 64) - 1;
  
  	/* BUFNMB has been reserved for INT pipe
  	 * see above */

  	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT)) {

  		bufnmb = pipe_num - 2;
  	} else {
  		bufnmb = info->bufnmb_last;
  		info->bufnmb_last += bufnmb_cnt + 1;
  
  		/*
  		 * double buffer
  		 */
  		if (is_double)
  			info->bufnmb_last += bufnmb_cnt + 1;
  	}
  
  	dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x
  ",
  		pipe_num, buff_size, bufnmb);
  
  	return	(0x1f & bufnmb_cnt)	<< 10 |
  		(0xff & bufnmb)		<<  0;
  }

  void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
  			      u16 epnum, u16 maxp)

  {

  	if (devsel > 0xA) {
  		struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  		struct device *dev = usbhs_priv_to_dev(priv);
  
  		dev_err(dev, "devsel error %d
  ", devsel);
  
  		devsel = 0;
  	}

  	usbhsp_pipe_barrier(pipe);

  	pipe->maxp = maxp;

  	usbhsp_pipe_select(pipe);

  	usbhsp_pipe_maxp_set(pipe, 0xFFFF,
  			     (devsel << 12) |
  			     maxp);

  
  	if (!usbhs_pipe_is_dcp(pipe))
  		usbhsp_pipe_cfg_set(pipe,  0x000F, epnum);
  }

  /*
   *		pipe control
   */
  int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
  {

  	/*
  	 * see
  	 *	usbhs_pipe_config_update()
  	 *	usbhs_dcp_malloc()
  	 */
  	return pipe->maxp;

  }
  
  int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
  {
  	return usbhsp_flags_has(pipe, IS_DIR_IN);
  }

  int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
  {
  	return usbhsp_flags_has(pipe, IS_DIR_HOST);
  }

  int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
  {
  	return usbhsp_flags_has(pipe, IS_RUNNING);
  }
  
  void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
  {
  	if (running)
  		usbhsp_flags_set(pipe, IS_RUNNING);
  	else
  		usbhsp_flags_clr(pipe, IS_RUNNING);
  }

  void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)

  {

  	u16 mask = (SQCLR | SQSET);

  	u16 val;
  
  	/*
  	 * sequence
  	 *  0  : data0
  	 *  1  : data1
  	 *  -1 : no change
  	 */
  	switch (sequence) {
  	case 0:
  		val = SQCLR;
  		break;
  	case 1:
  		val = SQSET;
  		break;
  	default:
  		return;
  	}

  
  	usbhsp_pipectrl_set(pipe, mask, val);

  }

  void usbhs_pipe_clear(struct usbhs_pipe *pipe)
  {
  	usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
  	usbhsp_pipectrl_set(pipe, ACLRM, 0);
  }

  static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
  {
  	struct usbhs_pipe *pos, *pipe;
  	int i;
  
  	/*
  	 * find target pipe
  	 */
  	pipe = NULL;
  	usbhs_for_each_pipe_with_dcp(pos, priv, i) {

  		if (!usbhs_pipe_type_is(pos, type))

  			continue;
  		if (usbhsp_flags_has(pos, IS_USED))
  			continue;
  
  		pipe = pos;
  		break;
  	}
  
  	if (!pipe)
  		return NULL;
  
  	/*
  	 * initialize pipe flags
  	 */
  	usbhsp_flags_init(pipe);
  	usbhsp_flags_set(pipe, IS_USED);
  
  	return pipe;
  }

  static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
  {
  	usbhsp_flags_init(pipe);
  }

  void usbhs_pipe_init(struct usbhs_priv *priv,

  		     int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))

  {

  	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

  	struct usbhs_pipe *pipe;
  	int i;
  
  	/*
  	 * FIXME
  	 *
  	 * driver needs good allocator.
  	 *
  	 * find first free buffer area (BULK, ISOC)
  	 * (DCP, INT area is fixed)
  	 *
  	 * buffer number 0 - 3 have been reserved for DCP
  	 * see
  	 *	usbhsp_to_bufnmb
  	 */
  	info->bufnmb_last = 4;
  	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {

  		if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))

  			info->bufnmb_last++;
  
  		usbhsp_flags_init(pipe);

  		pipe->fifo = NULL;

  		pipe->mod_private = NULL;

  		INIT_LIST_HEAD(&pipe->list);

  		/* pipe force init */

  		usbhs_pipe_clear(pipe);

  	}

  	info->dma_map_ctrl = dma_map_ctrl;

  }
  
  struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,

  				     int endpoint_type,
  				     int dir_in)

  {
  	struct device *dev = usbhs_priv_to_dev(priv);

  	struct usbhs_pipe *pipe;

  	int is_host = usbhs_mod_is_host(priv);

  	int ret;

  	u16 pipecfg, pipebuf;

  	pipe = usbhsp_get_pipe(priv, endpoint_type);

  	if (!pipe) {
  		dev_err(dev, "can't get pipe (%s)
  ",

  			usbhsp_pipe_name[endpoint_type]);

  		return NULL;

  	}

  	INIT_LIST_HEAD(&pipe->list);

  	usbhs_pipe_disable(pipe);

  
  	/* make sure pipe is not busy */
  	ret = usbhsp_pipe_barrier(pipe);
  	if (ret < 0) {
  		dev_err(dev, "pipe setup failed %d
  ", usbhs_pipe_number(pipe));
  		return NULL;
  	}

  	pipecfg  = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
  	pipebuf  = usbhsp_setup_pipebuff(pipe);

  	usbhsp_pipe_select(pipe);
  	usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
  	usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);

  	usbhs_pipe_clear(pipe);

  	usbhs_pipe_sequence_data0(pipe);

  
  	dev_dbg(dev, "enable pipe %d : %s (%s)
  ",
  		usbhs_pipe_number(pipe),

  		usbhs_pipe_name(pipe),

  		usbhs_pipe_is_dir_in(pipe) ? "in" : "out");

  	/*
  	 * epnum / maxp are still not set to this pipe.
  	 * call usbhs_pipe_config_update() after this function !!
  	 */

  	return pipe;
  }

  void usbhs_pipe_free(struct usbhs_pipe *pipe)
  {
  	usbhsp_put_pipe(pipe);
  }

  void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
  {
  	if (pipe->fifo)
  		pipe->fifo->pipe = NULL;
  
  	pipe->fifo = fifo;
  
  	if (fifo)
  		fifo->pipe = pipe;
  }

  /*
   *		dcp control
   */
  struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
  {
  	struct usbhs_pipe *pipe;
  
  	pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
  	if (!pipe)
  		return NULL;

  	INIT_LIST_HEAD(&pipe->list);

  	/*

  	 * call usbhs_pipe_config_update() after this function !!

  	 */

  	return pipe;
  }
  
  void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
  {

  	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

  	WARN_ON(!usbhs_pipe_is_dcp(pipe));

  	usbhs_pipe_enable(pipe);

  
  	if (!usbhs_mod_is_host(priv)) /* funconly */
  		usbhsp_pipectrl_set(pipe, CCPL, CCPL);

  }

  void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
  {
  	usbhsp_pipe_cfg_set(pipe, DIR_OUT,
  			    dir_out ? DIR_OUT : 0);
  }

  /*
   *		pipe module function
   */
  int usbhs_pipe_probe(struct usbhs_priv *priv)
  {

  	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

  	struct usbhs_pipe *pipe;
  	struct device *dev = usbhs_priv_to_dev(priv);
  	u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
  	int pipe_size = usbhs_get_dparam(priv, pipe_size);
  	int i;
  
  	/* This driver expects 1st pipe is DCP */
  	if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
  		dev_err(dev, "1st PIPE is not DCP
  ");
  		return -EINVAL;
  	}
  
  	info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
  	if (!info->pipe) {
  		dev_err(dev, "Could not allocate pipe
  ");
  		return -ENOMEM;
  	}
  
  	info->size = pipe_size;
  
  	/*
  	 * init pipe
  	 */
  	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
  		pipe->priv = priv;

  
  		usbhs_pipe_type(pipe) =
  			pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;

  
  		dev_dbg(dev, "pipe %x\t: %s
  ",
  			i, usbhsp_pipe_name[pipe_type[i]]);
  	}
  
  	return 0;
  }
  
  void usbhs_pipe_remove(struct usbhs_priv *priv)
  {

  	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

  
  	kfree(info->pipe);
  }