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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 NO_PAD_CTRL           ((iomux_v3_cfg_t)1 << (MUX_PAD_CTRL_SHIFT + 16))
#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))

/*
 * Use to set PAD control
 */

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

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

#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__*/


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