Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * PC-Speaker driver for Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 1993-1997  Michael Beck
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 1997-2001  David Woodhouse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright (C) 2001-2008  Stas Sergeev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <sound/pcm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "pcsp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) static bool nforce_wa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) module_param(nforce_wa, bool, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) MODULE_PARM_DESC(nforce_wa, "Apply NForce chipset workaround "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 		"(expect bad sound)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define DMIX_WANTS_S16	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * Call snd_pcm_period_elapsed in a work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * This avoids spinlock messes and long-running irq contexts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) static void pcsp_call_pcm_elapsed(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (atomic_read(&pcsp_chip.timer_active)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		struct snd_pcm_substream *substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		substream = pcsp_chip.playback_substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		if (substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 			snd_pcm_period_elapsed(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static DECLARE_WORK(pcsp_pcm_work, pcsp_call_pcm_elapsed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /* write the port and returns the next expire time in ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * called at the trigger-start and in hrtimer callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static u64 pcsp_timer_update(struct snd_pcsp *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	unsigned char timer_cnt, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	u64 ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct snd_pcm_substream *substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct snd_pcm_runtime *runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	if (chip->thalf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		outb(chip->val61, 0x61);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		chip->thalf = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		return chip->ns_rem;
^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) 	substream = chip->playback_substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	if (!substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	/* assume it is mono! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	val = runtime->dma_area[chip->playback_ptr + chip->fmt_size - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (chip->is_signed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		val ^= 0x80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	timer_cnt = val * CUR_DIV() / 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (timer_cnt && chip->enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		raw_spin_lock_irqsave(&i8253_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		if (!nforce_wa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			outb_p(chip->val61, 0x61);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			outb_p(timer_cnt, 0x42);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			outb(chip->val61 ^ 1, 0x61);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			outb(chip->val61 ^ 2, 0x61);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			chip->thalf = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		raw_spin_unlock_irqrestore(&i8253_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	chip->ns_rem = PCSP_PERIOD_NS();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	ns = (chip->thalf ? PCSP_CALC_NS(timer_cnt) : chip->ns_rem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	chip->ns_rem -= ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	return ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static void pcsp_pointer_update(struct snd_pcsp *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct snd_pcm_substream *substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	size_t period_bytes, buffer_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	int periods_elapsed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	/* update the playback position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	substream = chip->playback_substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (!substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	period_bytes = snd_pcm_lib_period_bytes(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	spin_lock_irqsave(&chip->substream_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	chip->playback_ptr += PCSP_INDEX_INC() * chip->fmt_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	periods_elapsed = chip->playback_ptr - chip->period_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	if (periods_elapsed < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		printk(KERN_INFO "PCSP: buffer_bytes mod period_bytes != 0 ? "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			"(%zi %zi %zi)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			chip->playback_ptr, period_bytes, buffer_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		periods_elapsed += buffer_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	periods_elapsed /= period_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* wrap the pointer _before_ calling snd_pcm_period_elapsed(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	 * or ALSA will BUG on us. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	chip->playback_ptr %= buffer_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	if (periods_elapsed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		chip->period_ptr += periods_elapsed * period_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		chip->period_ptr %= buffer_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		queue_work(system_highpri_wq, &pcsp_pcm_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	spin_unlock_irqrestore(&chip->substream_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct snd_pcsp *chip = container_of(handle, struct snd_pcsp, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int pointer_update;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	u64 ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (!atomic_read(&chip->timer_active) || !chip->playback_substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return HRTIMER_NORESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	pointer_update = !chip->thalf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	ns = pcsp_timer_update(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (!ns) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		printk(KERN_WARNING "PCSP: unexpected stop\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		return HRTIMER_NORESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (pointer_update)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		pcsp_pointer_update(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	hrtimer_forward(handle, hrtimer_get_expires(handle), ns_to_ktime(ns));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return HRTIMER_RESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static int pcsp_start_playing(struct snd_pcsp *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	printk(KERN_INFO "PCSP: start_playing called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (atomic_read(&chip->timer_active)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		printk(KERN_ERR "PCSP: Timer already active\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	raw_spin_lock(&i8253_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	chip->val61 = inb(0x61) | 0x03;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	outb_p(0x92, 0x43);	/* binary, mode 1, LSB only, ch 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	raw_spin_unlock(&i8253_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	atomic_set(&chip->timer_active, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	chip->thalf = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	hrtimer_start(&pcsp_chip.timer, 0, HRTIMER_MODE_REL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	return 0;
^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 void pcsp_stop_playing(struct snd_pcsp *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	printk(KERN_INFO "PCSP: stop_playing called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (!atomic_read(&chip->timer_active))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	atomic_set(&chip->timer_active, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	raw_spin_lock(&i8253_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	/* restore the timer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	outb_p(0xb6, 0x43);	/* binary, mode 3, LSB/MSB, ch 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	outb(chip->val61 & 0xFC, 0x61);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	raw_spin_unlock(&i8253_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)  * Force to stop and sync the stream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) void pcsp_sync_stop(struct snd_pcsp *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	pcsp_stop_playing(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	hrtimer_cancel(&chip->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	cancel_work_sync(&pcsp_pcm_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int snd_pcsp_playback_close(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	printk(KERN_INFO "PCSP: close called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	pcsp_sync_stop(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	chip->playback_substream = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static int snd_pcsp_playback_hw_params(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				       struct snd_pcm_hw_params *hw_params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	pcsp_sync_stop(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static int snd_pcsp_playback_hw_free(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	printk(KERN_INFO "PCSP: hw_free called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	pcsp_sync_stop(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static int snd_pcsp_playback_prepare(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	pcsp_sync_stop(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	chip->playback_ptr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	chip->period_ptr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	chip->fmt_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		snd_pcm_format_physical_width(substream->runtime->format) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	chip->is_signed = snd_pcm_format_signed(substream->runtime->format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	printk(KERN_INFO "PCSP: prepare called, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			"size=%zi psize=%zi f=%zi f1=%i fsize=%i\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			snd_pcm_lib_buffer_bytes(substream),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 			snd_pcm_lib_period_bytes(substream),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			snd_pcm_lib_buffer_bytes(substream) /
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			snd_pcm_lib_period_bytes(substream),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			substream->runtime->periods,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 			chip->fmt_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static int snd_pcsp_trigger(struct snd_pcm_substream *substream, int cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	printk(KERN_INFO "PCSP: trigger called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	case SNDRV_PCM_TRIGGER_START:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	case SNDRV_PCM_TRIGGER_RESUME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		return pcsp_start_playing(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	case SNDRV_PCM_TRIGGER_STOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	case SNDRV_PCM_TRIGGER_SUSPEND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		pcsp_stop_playing(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static snd_pcm_uframes_t snd_pcsp_playback_pointer(struct snd_pcm_substream
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 						   *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	unsigned int pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	spin_lock(&chip->substream_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	pos = chip->playback_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	spin_unlock(&chip->substream_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	return bytes_to_frames(substream->runtime, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static const struct snd_pcm_hardware snd_pcsp_playback = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	.info = (SNDRV_PCM_INFO_INTERLEAVED |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		 SNDRV_PCM_INFO_HALF_DUPLEX |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	.formats = (SNDRV_PCM_FMTBIT_U8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) #if DMIX_WANTS_S16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		    | SNDRV_PCM_FMTBIT_S16_LE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	    ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	.rates = SNDRV_PCM_RATE_KNOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	.rate_min = PCSP_DEFAULT_SRATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.rate_max = PCSP_DEFAULT_SRATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.channels_min = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.channels_max = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.buffer_bytes_max = PCSP_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.period_bytes_min = 64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	.period_bytes_max = PCSP_MAX_PERIOD_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.periods_min = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.periods_max = PCSP_MAX_PERIODS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	.fifo_size = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int snd_pcsp_playback_open(struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	struct snd_pcsp *chip = snd_pcm_substream_chip(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	struct snd_pcm_runtime *runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) #if PCSP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	printk(KERN_INFO "PCSP: open called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	if (atomic_read(&chip->timer_active)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		printk(KERN_ERR "PCSP: still active!!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	runtime->hw = snd_pcsp_playback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	chip->playback_substream = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static const struct snd_pcm_ops snd_pcsp_playback_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	.open = snd_pcsp_playback_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	.close = snd_pcsp_playback_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	.hw_params = snd_pcsp_playback_hw_params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	.hw_free = snd_pcsp_playback_hw_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	.prepare = snd_pcsp_playback_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	.trigger = snd_pcsp_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	.pointer = snd_pcsp_playback_pointer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) int snd_pcsp_new_pcm(struct snd_pcsp *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	err = snd_pcm_new(chip->card, "pcspeaker", 0, 1, 0, &chip->pcm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	snd_pcm_set_ops(chip->pcm, SNDRV_PCM_STREAM_PLAYBACK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 			&snd_pcsp_playback_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	chip->pcm->private_data = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	chip->pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	strcpy(chip->pcm->name, "pcsp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	snd_pcm_set_managed_buffer_all(chip->pcm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 				       SNDRV_DMA_TYPE_CONTINUOUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 				       NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 				       PCSP_BUFFER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 				       PCSP_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }