1. 根目录:
2. arch
3. arm
4. mach-imx
5. iomux-v3.h

/*
 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
 *			<armlinux@phytec.de>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef __MACH_IOMUX_V3_H__
#define __MACH_IOMUX_V3_H__

/*
 *	build IOMUX_PAD structure
 *
 * This iomux scheme is based around pads, which are the physical balls
 * on the processor.
 *
 * - Each pad has a pad control register (IOMUXC_SW_PAD_CTRL_x) which controls
 *   things like driving strength and pullup/pulldown.
 * - Each pad can have but not necessarily does have an output routing register
 *   (IOMUXC_SW_MUX_CTL_PAD_x).
 * - Each pad can have but not necessarily does have an input routing register
 *   (IOMUXC_x_SELECT_INPUT)
 *
 * The three register sets do not have a fixed offset to each other,
 * hence we order this table by pad control registers (which all pads
 * have) and put the optional i/o routing registers into additional
 * fields.
 *
 * The naming convention for the pad modes is MX35_PAD_<padname>__<padmode>
 * If <padname> or <padmode> refers to a GPIO, it is named
 * GPIO_<unit>_<num>
 *
 * IOMUX/PAD Bit field definitions
 *
 * MUX_CTRL_OFS:	    0..11 (12)
 * PAD_CTRL_OFS:	   12..23 (12)
 * SEL_INPUT_OFS:	   24..35 (12)
 * MUX_MODE + SION:	   36..40  (5)
 * PAD_CTRL + NO_PAD_CTRL: 41..57 (17)
 * SEL_INP:		   58..61  (4)
 * reserved:		     63    (1)
*/

typedef u64 iomux_v3_cfg_t;

#define MUX_CTRL_OFS_SHIFT	0
#define MUX_CTRL_OFS_MASK	((iomux_v3_cfg_t)0xfff << MUX_CTRL_OFS_SHIFT)
#define MUX_PAD_CTRL_OFS_SHIFT	12
#define MUX_PAD_CTRL_OFS_MASK	((iomux_v3_cfg_t)0xfff << MUX_PAD_CTRL_OFS_SHIFT)
#define MUX_SEL_INPUT_OFS_SHIFT	24
#define MUX_SEL_INPUT_OFS_MASK	((iomux_v3_cfg_t)0xfff << MUX_SEL_INPUT_OFS_SHIFT)

#define MUX_MODE_SHIFT		36
#define MUX_MODE_MASK		((iomux_v3_cfg_t)0x1f << MUX_MODE_SHIFT)
#define MUX_PAD_CTRL_SHIFT	41
#define MUX_PAD_CTRL_MASK	((iomux_v3_cfg_t)0x1ffff << MUX_PAD_CTRL_SHIFT)
#define MUX_SEL_INPUT_SHIFT	58
#define MUX_SEL_INPUT_MASK	((iomux_v3_cfg_t)0xf << MUX_SEL_INPUT_SHIFT)

#define MUX_PAD_CTRL(x)		((iomux_v3_cfg_t)(x) << MUX_PAD_CTRL_SHIFT)

#define IOMUX_PAD(_pad_ctrl_ofs, _mux_ctrl_ofs, _mux_mode, _sel_input_ofs, \
		_sel_input, _pad_ctrl)					\
	(((iomux_v3_cfg_t)(_mux_ctrl_ofs) << MUX_CTRL_OFS_SHIFT) |	\
		((iomux_v3_cfg_t)(_mux_mode) << MUX_MODE_SHIFT) |	\
		((iomux_v3_cfg_t)(_pad_ctrl_ofs) << MUX_PAD_CTRL_OFS_SHIFT) | \
		((iomux_v3_cfg_t)(_pad_ctrl) << MUX_PAD_CTRL_SHIFT) |	\
		((iomux_v3_cfg_t)(_sel_input_ofs) << MUX_SEL_INPUT_OFS_SHIFT) | \
		((iomux_v3_cfg_t)(_sel_input) << MUX_SEL_INPUT_SHIFT))

#define NEW_PAD_CTRL(cfg, pad)	(((cfg) & ~MUX_PAD_CTRL_MASK) | MUX_PAD_CTRL(pad))
/*
 * Use to set PAD control
 */

#define NO_PAD_CTRL			(1 << 16)
#define PAD_CTL_DVS			(1 << 13)
#define PAD_CTL_HYS			(1 << 8)

#define PAD_CTL_PKE			(1 << 7)
#define PAD_CTL_PUE			(1 << 6 | PAD_CTL_PKE)
#define PAD_CTL_PUS_100K_DOWN		(0 << 4 | PAD_CTL_PUE)
#define PAD_CTL_PUS_47K_UP		(1 << 4 | PAD_CTL_PUE)
#define PAD_CTL_PUS_100K_UP		(2 << 4 | PAD_CTL_PUE)
#define PAD_CTL_PUS_22K_UP		(3 << 4 | PAD_CTL_PUE)

#define PAD_CTL_ODE			(1 << 3)

#define PAD_CTL_DSE_LOW			(0 << 1)
#define PAD_CTL_DSE_MED			(1 << 1)
#define PAD_CTL_DSE_HIGH		(2 << 1)
#define PAD_CTL_DSE_MAX			(3 << 1)

#define PAD_CTL_SRE_FAST		(1 << 0)
#define PAD_CTL_SRE_SLOW		(0 << 0)

#define IOMUX_CONFIG_SION		(0x1 << 4)

#define MX51_NUM_GPIO_PORT	4

#define GPIO_PIN_MASK 0x1f

#define GPIO_PORT_SHIFT 5
#define GPIO_PORT_MASK (0x7 << GPIO_PORT_SHIFT)

#define GPIO_PORTA	(0 << GPIO_PORT_SHIFT)
#define GPIO_PORTB	(1 << GPIO_PORT_SHIFT)
#define GPIO_PORTC	(2 << GPIO_PORT_SHIFT)
#define GPIO_PORTD	(3 << GPIO_PORT_SHIFT)
#define GPIO_PORTE	(4 << GPIO_PORT_SHIFT)
#define GPIO_PORTF	(5 << GPIO_PORT_SHIFT)

/*
 * setups a single pad in the iomuxer
 */
int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad);

/*
 * setups mutliple pads
 * convenient way to call the above function with tables
 */
int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count);

/*
 * Initialise the iomux controller
 */
void mxc_iomux_v3_init(void __iomem *iomux_v3_base);

#endif /* __MACH_IOMUX_V3_H__*/