1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for Sound Core PDAudioCF soundcard
5 * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
8 #include <sound/core.h>
10 #include <sound/initval.h>
11 #include <asm/irq_regs.h>
16 irqreturn_t pdacf_interrupt(int irq, void *dev)
18 struct snd_pdacf *chip = dev;
20 bool wake_thread = false;
22 if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|
23 PDAUDIOCF_STAT_IS_CONFIGURED|
24 PDAUDIOCF_STAT_IS_SUSPENDED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
25 return IRQ_HANDLED; /* IRQ_NONE here? */
27 stat = inw(chip->port + PDAUDIOCF_REG_ISR);
28 if (stat & (PDAUDIOCF_IRQLVL|PDAUDIOCF_IRQOVR)) {
29 if (stat & PDAUDIOCF_IRQOVR) /* should never happen */
30 snd_printk(KERN_ERR "PDAUDIOCF SRAM buffer overrun detected!\n");
31 if (chip->pcm_substream)
33 if (!(stat & PDAUDIOCF_IRQAKM))
34 stat |= PDAUDIOCF_IRQAKM; /* check rate */
36 if (get_irq_regs() != NULL)
37 snd_ak4117_check_rate_and_errors(chip->ak4117, 0);
38 return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED;
41 static inline void pdacf_transfer_mono16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
44 *dst++ = inw(rdp_port) ^ xor;
49 static inline void pdacf_transfer_mono32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
51 register u16 val1, val2;
57 *dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
61 static inline void pdacf_transfer_stereo16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
64 *dst++ = inw(rdp_port) ^ xor;
65 *dst++ = inw(rdp_port) ^ xor;
69 static inline void pdacf_transfer_stereo32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
71 register u16 val1, val2, val3;
77 *dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
78 *dst++ = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
82 static inline void pdacf_transfer_mono16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
85 *dst++ = swab16(inw(rdp_port) ^ xor);
90 static inline void pdacf_transfer_mono32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
92 register u16 val1, val2;
98 *dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
102 static inline void pdacf_transfer_stereo16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
105 *dst++ = swab16(inw(rdp_port) ^ xor);
106 *dst++ = swab16(inw(rdp_port) ^ xor);
110 static inline void pdacf_transfer_stereo32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
112 register u16 val1, val2, val3;
115 val1 = inw(rdp_port);
116 val2 = inw(rdp_port);
117 val3 = inw(rdp_port);
118 *dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
119 *dst++ = swab32((((u32)val3 << 16) | (val2 & 0xff00)) ^ xor);
123 static inline void pdacf_transfer_mono24le(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
125 register u16 val1, val2;
129 val1 = inw(rdp_port);
130 val2 = inw(rdp_port);
132 xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
133 *dst++ = (u8)(xval1 >> 8);
134 *dst++ = (u8)(xval1 >> 16);
135 *dst++ = (u8)(xval1 >> 24);
139 static inline void pdacf_transfer_mono24be(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
141 register u16 val1, val2;
145 val1 = inw(rdp_port);
146 val2 = inw(rdp_port);
148 xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
149 *dst++ = (u8)(xval1 >> 24);
150 *dst++ = (u8)(xval1 >> 16);
151 *dst++ = (u8)(xval1 >> 8);
155 static inline void pdacf_transfer_stereo24le(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
157 register u16 val1, val2, val3;
158 register u32 xval1, xval2;
161 val1 = inw(rdp_port);
162 val2 = inw(rdp_port);
163 val3 = inw(rdp_port);
164 xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
165 xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
166 *dst++ = (u8)(xval1 >> 8);
167 *dst++ = (u8)(xval1 >> 16);
168 *dst++ = (u8)(xval1 >> 24);
169 *dst++ = (u8)(xval2 >> 8);
170 *dst++ = (u8)(xval2 >> 16);
171 *dst++ = (u8)(xval2 >> 24);
175 static inline void pdacf_transfer_stereo24be(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
177 register u16 val1, val2, val3;
178 register u32 xval1, xval2;
181 val1 = inw(rdp_port);
182 val2 = inw(rdp_port);
183 val3 = inw(rdp_port);
184 xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
185 xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
186 *dst++ = (u8)(xval1 >> 24);
187 *dst++ = (u8)(xval1 >> 16);
188 *dst++ = (u8)(xval1 >> 8);
189 *dst++ = (u8)(xval2 >> 24);
190 *dst++ = (u8)(xval2 >> 16);
191 *dst++ = (u8)(xval2 >> 8);
195 static void pdacf_transfer(struct snd_pdacf *chip, unsigned int size, unsigned int off)
197 unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
198 unsigned int xor = chip->pcm_xor;
200 if (chip->pcm_sample == 3) {
201 if (chip->pcm_little) {
202 if (chip->pcm_channels == 1) {
203 pdacf_transfer_mono24le((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
205 pdacf_transfer_stereo24le((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
208 if (chip->pcm_channels == 1) {
209 pdacf_transfer_mono24be((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
211 pdacf_transfer_stereo24be((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
216 if (chip->pcm_swab == 0) {
217 if (chip->pcm_channels == 1) {
218 if (chip->pcm_frame == 2) {
219 pdacf_transfer_mono16((u16 *)chip->pcm_area + off, xor, size, rdp_port);
221 pdacf_transfer_mono32((u32 *)chip->pcm_area + off, xor, size, rdp_port);
224 if (chip->pcm_frame == 2) {
225 pdacf_transfer_stereo16((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
227 pdacf_transfer_stereo32((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
231 if (chip->pcm_channels == 1) {
232 if (chip->pcm_frame == 2) {
233 pdacf_transfer_mono16sw((u16 *)chip->pcm_area + off, xor, size, rdp_port);
235 pdacf_transfer_mono32sw((u32 *)chip->pcm_area + off, xor, size, rdp_port);
238 if (chip->pcm_frame == 2) {
239 pdacf_transfer_stereo16sw((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
241 pdacf_transfer_stereo32sw((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
247 irqreturn_t pdacf_threaded_irq(int irq, void *dev)
249 struct snd_pdacf *chip = dev;
250 int size, off, cont, rdp, wdp;
252 if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|PDAUDIOCF_STAT_IS_CONFIGURED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
255 if (chip->pcm_substream == NULL || chip->pcm_substream->runtime == NULL || !snd_pcm_running(chip->pcm_substream))
258 rdp = inw(chip->port + PDAUDIOCF_REG_RDP);
259 wdp = inw(chip->port + PDAUDIOCF_REG_WDP);
260 /* printk(KERN_DEBUG "TASKLET: rdp = %x, wdp = %x\n", rdp, wdp); */
266 size /= chip->pcm_frame;
271 chip->pcm_hwptr += size;
272 chip->pcm_hwptr %= chip->pcm_size;
273 chip->pcm_tdone += size;
274 if (chip->pcm_frame == 2) {
275 unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
281 unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
289 off = chip->pcm_hwptr + chip->pcm_tdone;
290 off %= chip->pcm_size;
291 chip->pcm_tdone += size;
293 cont = chip->pcm_size - off;
296 pdacf_transfer(chip, cont, off);
298 off %= chip->pcm_size;
302 mutex_lock(&chip->reg_lock);
303 while (chip->pcm_tdone >= chip->pcm_period) {
304 chip->pcm_hwptr += chip->pcm_period;
305 chip->pcm_hwptr %= chip->pcm_size;
306 chip->pcm_tdone -= chip->pcm_period;
307 mutex_unlock(&chip->reg_lock);
308 snd_pcm_period_elapsed(chip->pcm_substream);
309 mutex_lock(&chip->reg_lock);
311 mutex_unlock(&chip->reg_lock);