Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * mainstone-wm97xx.c  --  Mainstone Continuous Touch screen driver for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *                         Wolfson WM97xx AC97 Codecs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright 2004, 2007 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Parts Copyright : Ian Molton <spyro@f2s.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *                   Andrew Zabolotny <zap@homelink.ru>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * Notes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *     This is a wm97xx extended touch driver to capture touch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *     data in a continuous manner on the Intel XScale architecture
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *  Features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *       - codecs supported:- WM9705, WM9712, WM9713
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *       - processors supported:- Intel XScale PXA25x, PXA26x, PXA27x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/wm97xx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <mach/regs-ac97.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <asm/mach-types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) struct continuous {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	u16 id;    /* codec id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	u8 code;   /* continuous code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	u8 reads;  /* number of coord reads per read cycle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	u32 speed; /* number of coords per second */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define WM_READS(sp) ((sp / HZ) + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static const struct continuous cinfo[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	{WM9705_ID2, 0, WM_READS(94), 94},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	{WM9705_ID2, 1, WM_READS(188), 188},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	{WM9705_ID2, 2, WM_READS(375), 375},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	{WM9705_ID2, 3, WM_READS(750), 750},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	{WM9712_ID2, 0, WM_READS(94), 94},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	{WM9712_ID2, 1, WM_READS(188), 188},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	{WM9712_ID2, 2, WM_READS(375), 375},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	{WM9712_ID2, 3, WM_READS(750), 750},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	{WM9713_ID2, 0, WM_READS(94), 94},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	{WM9713_ID2, 1, WM_READS(120), 120},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	{WM9713_ID2, 2, WM_READS(154), 154},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	{WM9713_ID2, 3, WM_READS(188), 188},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /* continuous speed index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static int sp_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static u16 last, tries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * Pen sampling frequency (Hz) in continuous mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static int cont_rate = 200;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) module_param(cont_rate, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71)  * Pen down detection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  * This driver can either poll or use an interrupt to indicate a pen down
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  * event. If the irq request fails then it will fall back to polling mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static int pen_int;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) module_param(pen_int, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  * Pressure readback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  * Set to 1 to read back pen down pressure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static int pressure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) module_param(pressure, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  * AC97 touch data slot.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * Touch screen readback data ac97 slot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static int ac97_touch_slot = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) module_param(ac97_touch_slot, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) /* flush AC97 slot 5 FIFO on pxa machines */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #ifdef CONFIG_PXA27x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static void wm97xx_acc_pen_up(struct wm97xx *wm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	schedule_timeout_uninterruptible(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	while (MISR & (1 << 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		MODR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static void wm97xx_acc_pen_up(struct wm97xx *wm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	unsigned int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	schedule_timeout_uninterruptible(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	for (count = 0; count < 16; count++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		MODR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int wm97xx_acc_pen_down(struct wm97xx *wm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	int reads = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	/* When the AC97 queue has been drained we need to allow time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	 * to buffer up samples otherwise we end up spinning polling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	 * for samples.  The controller can't have a suitably low
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	 * threshold set to use the notifications it gives.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	schedule_timeout_uninterruptible(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (tries > 5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		tries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return RC_PENUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	x = MODR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (x == last) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		tries++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		return RC_AGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	last = x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		if (reads)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			x = MODR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		y = MODR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		if (pressure)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			p = MODR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		dev_dbg(wm->dev, "Raw coordinates: x=%x, y=%x, p=%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			x, y, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		/* are samples valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		if ((x & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_X ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		    (y & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_Y ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		    (p & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_PRES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			goto up;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		/* coordinate is good */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		tries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		input_report_abs(wm->input_dev, ABS_X, x & 0xfff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		input_report_abs(wm->input_dev, ABS_Y, y & 0xfff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		input_report_abs(wm->input_dev, ABS_PRESSURE, p & 0xfff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		input_report_key(wm->input_dev, BTN_TOUCH, (p != 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		input_sync(wm->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		reads++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	} while (reads < cinfo[sp_idx].reads);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) up:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	return RC_PENDOWN | RC_AGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static int wm97xx_acc_startup(struct wm97xx *wm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	int idx = 0, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	/* check we have a codec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (wm->ac97 == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	/* Go you big red fire engine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		if (wm->id != cinfo[idx].id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		sp_idx = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		if (cont_rate <= cinfo[idx].speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	wm->acc_rate = cinfo[sp_idx].code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	wm->acc_slot = ac97_touch_slot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	dev_info(wm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		 "mainstone accelerated touchscreen driver, %d samples/sec\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		 cinfo[sp_idx].speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	/* IRQ driven touchscreen is used on Palm hardware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (machine_is_palmt5() || machine_is_palmtx() || machine_is_palmld()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		pen_int = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		irq = 27;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		/* There is some obscure mutant of WM9712 interbred with WM9713
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		 * used on Palm HW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		wm->variant = WM97xx_WM1613;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	} else if (machine_is_mainstone() && pen_int)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		irq = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		ret = gpio_request(irq, "Touchscreen IRQ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		ret = gpio_direction_input(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			gpio_free(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		wm->pen_irq = gpio_to_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		irq_set_irq_type(wm->pen_irq, IRQ_TYPE_EDGE_BOTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	} else /* pen irq not supported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		pen_int = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	/* codec specific irq config */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (pen_int) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		switch (wm->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		case WM9705_ID2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		case WM9712_ID2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		case WM9713_ID2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			/* use PEN_DOWN GPIO 13 to assert IRQ on GPIO line 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 					   WM97XX_GPIO_POL_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 					   WM97XX_GPIO_STICKY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 					   WM97XX_GPIO_WAKE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 					   WM97XX_GPIO_POL_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 					   WM97XX_GPIO_NOTSTICKY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 					   WM97XX_GPIO_NOWAKE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 			dev_err(wm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 				"pen down irq not supported on this device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			pen_int = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static void wm97xx_acc_shutdown(struct wm97xx *wm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	/* codec specific deconfig */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	if (pen_int) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		if (irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			gpio_free(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		wm->pen_irq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static void wm97xx_irq_enable(struct wm97xx *wm, int enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	if (enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		enable_irq(wm->pen_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		disable_irq_nosync(wm->pen_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static struct wm97xx_mach_ops mainstone_mach_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	.acc_enabled = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	.acc_pen_up = wm97xx_acc_pen_up,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	.acc_pen_down = wm97xx_acc_pen_down,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	.acc_startup = wm97xx_acc_startup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	.acc_shutdown = wm97xx_acc_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	.irq_enable = wm97xx_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	.irq_gpio = WM97XX_GPIO_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int mainstone_wm97xx_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	struct wm97xx *wm = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	return wm97xx_register_mach_ops(wm, &mainstone_mach_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static int mainstone_wm97xx_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	struct wm97xx *wm = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	wm97xx_unregister_mach_ops(wm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static struct platform_driver mainstone_wm97xx_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.probe = mainstone_wm97xx_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.remove = mainstone_wm97xx_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		.name = "wm97xx-touch",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) module_platform_driver(mainstone_wm97xx_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /* Module information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) MODULE_DESCRIPTION("wm97xx continuous touch driver for mainstone");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) MODULE_LICENSE("GPL");