mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 10:37:51 +07:00
ead25133e9
Add core files for low resolution analog-to-digital converter (mxs-lradc) MFD driver. Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com> Reviewed-by: Marek Vasut <marex@denx.de> Signed-off-by: Lee Jones <lee.jones@linaro.org>
188 lines
6.0 KiB
C
188 lines
6.0 KiB
C
/*
|
|
* Freescale MXS Low Resolution Analog-to-Digital Converter driver
|
|
*
|
|
* Copyright (c) 2012 DENX Software Engineering, GmbH.
|
|
* Copyright (c) 2016 Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
|
|
*
|
|
* Author: Marek Vasut <marex@denx.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.
|
|
*/
|
|
|
|
#ifndef __MFD_MXS_LRADC_H
|
|
#define __MFD_MXS_LRADC_H
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/io.h>
|
|
#include <linux/stmp_device.h>
|
|
|
|
#define LRADC_MAX_DELAY_CHANS 4
|
|
#define LRADC_MAX_MAPPED_CHANS 8
|
|
#define LRADC_MAX_TOTAL_CHANS 16
|
|
|
|
#define LRADC_DELAY_TIMER_HZ 2000
|
|
|
|
#define LRADC_CTRL0 0x00
|
|
# define LRADC_CTRL0_MX28_TOUCH_DETECT_ENABLE BIT(23)
|
|
# define LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE BIT(22)
|
|
# define LRADC_CTRL0_MX28_YNNSW /* YM */ BIT(21)
|
|
# define LRADC_CTRL0_MX28_YPNSW /* YP */ BIT(20)
|
|
# define LRADC_CTRL0_MX28_YPPSW /* YP */ BIT(19)
|
|
# define LRADC_CTRL0_MX28_XNNSW /* XM */ BIT(18)
|
|
# define LRADC_CTRL0_MX28_XNPSW /* XM */ BIT(17)
|
|
# define LRADC_CTRL0_MX28_XPPSW /* XP */ BIT(16)
|
|
|
|
# define LRADC_CTRL0_MX23_TOUCH_DETECT_ENABLE BIT(20)
|
|
# define LRADC_CTRL0_MX23_YM BIT(19)
|
|
# define LRADC_CTRL0_MX23_XM BIT(18)
|
|
# define LRADC_CTRL0_MX23_YP BIT(17)
|
|
# define LRADC_CTRL0_MX23_XP BIT(16)
|
|
|
|
# define LRADC_CTRL0_MX28_PLATE_MASK \
|
|
(LRADC_CTRL0_MX28_TOUCH_DETECT_ENABLE | \
|
|
LRADC_CTRL0_MX28_YNNSW | LRADC_CTRL0_MX28_YPNSW | \
|
|
LRADC_CTRL0_MX28_YPPSW | LRADC_CTRL0_MX28_XNNSW | \
|
|
LRADC_CTRL0_MX28_XNPSW | LRADC_CTRL0_MX28_XPPSW)
|
|
|
|
# define LRADC_CTRL0_MX23_PLATE_MASK \
|
|
(LRADC_CTRL0_MX23_TOUCH_DETECT_ENABLE | \
|
|
LRADC_CTRL0_MX23_YM | LRADC_CTRL0_MX23_XM | \
|
|
LRADC_CTRL0_MX23_YP | LRADC_CTRL0_MX23_XP)
|
|
|
|
#define LRADC_CTRL1 0x10
|
|
#define LRADC_CTRL1_TOUCH_DETECT_IRQ_EN BIT(24)
|
|
#define LRADC_CTRL1_LRADC_IRQ_EN(n) (1 << ((n) + 16))
|
|
#define LRADC_CTRL1_MX28_LRADC_IRQ_EN_MASK (0x1fff << 16)
|
|
#define LRADC_CTRL1_MX23_LRADC_IRQ_EN_MASK (0x01ff << 16)
|
|
#define LRADC_CTRL1_LRADC_IRQ_EN_OFFSET 16
|
|
#define LRADC_CTRL1_TOUCH_DETECT_IRQ BIT(8)
|
|
#define LRADC_CTRL1_LRADC_IRQ(n) BIT(n)
|
|
#define LRADC_CTRL1_MX28_LRADC_IRQ_MASK 0x1fff
|
|
#define LRADC_CTRL1_MX23_LRADC_IRQ_MASK 0x01ff
|
|
#define LRADC_CTRL1_LRADC_IRQ_OFFSET 0
|
|
|
|
#define LRADC_CTRL2 0x20
|
|
#define LRADC_CTRL2_DIVIDE_BY_TWO_OFFSET 24
|
|
#define LRADC_CTRL2_TEMPSENSE_PWD BIT(15)
|
|
|
|
#define LRADC_STATUS 0x40
|
|
#define LRADC_STATUS_TOUCH_DETECT_RAW BIT(0)
|
|
|
|
#define LRADC_CH(n) (0x50 + (0x10 * (n)))
|
|
#define LRADC_CH_ACCUMULATE BIT(29)
|
|
#define LRADC_CH_NUM_SAMPLES_MASK (0x1f << 24)
|
|
#define LRADC_CH_NUM_SAMPLES_OFFSET 24
|
|
#define LRADC_CH_NUM_SAMPLES(x) \
|
|
((x) << LRADC_CH_NUM_SAMPLES_OFFSET)
|
|
#define LRADC_CH_VALUE_MASK 0x3ffff
|
|
#define LRADC_CH_VALUE_OFFSET 0
|
|
|
|
#define LRADC_DELAY(n) (0xd0 + (0x10 * (n)))
|
|
#define LRADC_DELAY_TRIGGER_LRADCS_MASK (0xffUL << 24)
|
|
#define LRADC_DELAY_TRIGGER_LRADCS_OFFSET 24
|
|
#define LRADC_DELAY_TRIGGER(x) \
|
|
(((x) << LRADC_DELAY_TRIGGER_LRADCS_OFFSET) & \
|
|
LRADC_DELAY_TRIGGER_LRADCS_MASK)
|
|
#define LRADC_DELAY_KICK BIT(20)
|
|
#define LRADC_DELAY_TRIGGER_DELAYS_MASK (0xf << 16)
|
|
#define LRADC_DELAY_TRIGGER_DELAYS_OFFSET 16
|
|
#define LRADC_DELAY_TRIGGER_DELAYS(x) \
|
|
(((x) << LRADC_DELAY_TRIGGER_DELAYS_OFFSET) & \
|
|
LRADC_DELAY_TRIGGER_DELAYS_MASK)
|
|
#define LRADC_DELAY_LOOP_COUNT_MASK (0x1f << 11)
|
|
#define LRADC_DELAY_LOOP_COUNT_OFFSET 11
|
|
#define LRADC_DELAY_LOOP(x) \
|
|
(((x) << LRADC_DELAY_LOOP_COUNT_OFFSET) & \
|
|
LRADC_DELAY_LOOP_COUNT_MASK)
|
|
#define LRADC_DELAY_DELAY_MASK 0x7ff
|
|
#define LRADC_DELAY_DELAY_OFFSET 0
|
|
#define LRADC_DELAY_DELAY(x) \
|
|
(((x) << LRADC_DELAY_DELAY_OFFSET) & \
|
|
LRADC_DELAY_DELAY_MASK)
|
|
|
|
#define LRADC_CTRL4 0x140
|
|
#define LRADC_CTRL4_LRADCSELECT_MASK(n) (0xf << ((n) * 4))
|
|
#define LRADC_CTRL4_LRADCSELECT_OFFSET(n) ((n) * 4)
|
|
#define LRADC_CTRL4_LRADCSELECT(n, x) \
|
|
(((x) << LRADC_CTRL4_LRADCSELECT_OFFSET(n)) & \
|
|
LRADC_CTRL4_LRADCSELECT_MASK(n))
|
|
|
|
#define LRADC_RESOLUTION 12
|
|
#define LRADC_SINGLE_SAMPLE_MASK ((1 << LRADC_RESOLUTION) - 1)
|
|
|
|
#define BUFFER_VCHANS_LIMITED 0x3f
|
|
#define BUFFER_VCHANS_ALL 0xff
|
|
|
|
/*
|
|
* Certain LRADC channels are shared between touchscreen
|
|
* and/or touch-buttons and generic LRADC block. Therefore when using
|
|
* either of these, these channels are not available for the regular
|
|
* sampling. The shared channels are as follows:
|
|
*
|
|
* CH0 -- Touch button #0
|
|
* CH1 -- Touch button #1
|
|
* CH2 -- Touch screen XPUL
|
|
* CH3 -- Touch screen YPLL
|
|
* CH4 -- Touch screen XNUL
|
|
* CH5 -- Touch screen YNLR
|
|
* CH6 -- Touch screen WIPER (5-wire only)
|
|
*
|
|
* The bit fields below represents which parts of the LRADC block are
|
|
* switched into special mode of operation. These channels can not
|
|
* be sampled as regular LRADC channels. The driver will refuse any
|
|
* attempt to sample these channels.
|
|
*/
|
|
#define CHAN_MASK_TOUCHBUTTON (BIT(1) | BIT(0))
|
|
#define CHAN_MASK_TOUCHSCREEN_4WIRE (0xf << 2)
|
|
#define CHAN_MASK_TOUCHSCREEN_5WIRE (0x1f << 2)
|
|
|
|
enum mxs_lradc_id {
|
|
IMX23_LRADC,
|
|
IMX28_LRADC,
|
|
};
|
|
|
|
enum mxs_lradc_ts_wires {
|
|
MXS_LRADC_TOUCHSCREEN_NONE = 0,
|
|
MXS_LRADC_TOUCHSCREEN_4WIRE,
|
|
MXS_LRADC_TOUCHSCREEN_5WIRE,
|
|
};
|
|
|
|
/**
|
|
* struct mxs_lradc
|
|
* @soc: soc type (IMX23 or IMX28)
|
|
* @clk: 2 kHz clock for delay units
|
|
* @buffer_vchans: channels that can be used during buffered capture
|
|
* @touchscreen_wire: touchscreen type (4-wire or 5-wire)
|
|
* @use_touchbutton: button state (on or off)
|
|
*/
|
|
struct mxs_lradc {
|
|
enum mxs_lradc_id soc;
|
|
struct clk *clk;
|
|
u8 buffer_vchans;
|
|
|
|
enum mxs_lradc_ts_wires touchscreen_wire;
|
|
bool use_touchbutton;
|
|
};
|
|
|
|
static inline u32 mxs_lradc_irq_mask(struct mxs_lradc *lradc)
|
|
{
|
|
switch (lradc->soc) {
|
|
case IMX23_LRADC:
|
|
return LRADC_CTRL1_MX23_LRADC_IRQ_MASK;
|
|
case IMX28_LRADC:
|
|
return LRADC_CTRL1_MX28_LRADC_IRQ_MASK;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#endif /* __MXS_LRADC_H */
|