Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 1 | /* |
| 2 | * File: bf5xx_sport.c |
| 3 | * Based on: |
| 4 | * Author: Roy Huang <roy.huang@analog.com> |
| 5 | * |
| 6 | * Created: Tue Sep 21 10:52:42 CEST 2004 |
| 7 | * Description: |
| 8 | * Blackfin SPORT Driver |
| 9 | * |
| 10 | * Copyright 2004-2007 Analog Devices Inc. |
| 11 | * |
| 12 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with this program; if not, see the file COPYING, or write |
| 26 | * to the Free Software Foundation, Inc., |
| 27 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 28 | */ |
| 29 | |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/dma-mapping.h> |
| 34 | #include <linux/gpio.h> |
| 35 | #include <linux/bug.h> |
Paul Gortmaker | 6a550b9 | 2011-08-09 16:54:30 -0400 | [diff] [blame] | 36 | #include <linux/module.h> |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 37 | #include <asm/portmux.h> |
| 38 | #include <asm/dma.h> |
| 39 | #include <asm/blackfin.h> |
| 40 | #include <asm/cacheflush.h> |
| 41 | |
| 42 | #include "bf5xx-sport.h" |
| 43 | /* delay between frame sync pulse and first data bit in multichannel mode */ |
| 44 | #define FRAME_DELAY (1<<12) |
| 45 | |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 46 | /* note: multichannel is in units of 8 channels, |
| 47 | * tdm_count is # channels NOT / 8 ! */ |
| 48 | int sport_set_multichannel(struct sport_device *sport, |
Lars-Peter Clausen | 6344260 | 2013-05-28 19:22:11 +0200 | [diff] [blame] | 49 | int tdm_count, u32 tx_mask, u32 rx_mask, int packed) |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 50 | { |
Lars-Peter Clausen | 6344260 | 2013-05-28 19:22:11 +0200 | [diff] [blame] | 51 | pr_debug("%s tdm_count=%d tx_mask:0x%08x rx_mask:0x%08x packed=%d\n", |
| 52 | __func__, tdm_count, tx_mask, rx_mask, packed); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 53 | |
| 54 | if ((sport->regs->tcr1 & TSPEN) || (sport->regs->rcr1 & RSPEN)) |
| 55 | return -EBUSY; |
| 56 | |
| 57 | if (tdm_count & 0x7) |
| 58 | return -EINVAL; |
| 59 | |
| 60 | if (tdm_count > 32) |
| 61 | return -EINVAL; /* Only support less than 32 channels now */ |
| 62 | |
| 63 | if (tdm_count) { |
| 64 | sport->regs->mcmc1 = ((tdm_count>>3)-1) << 12; |
| 65 | sport->regs->mcmc2 = FRAME_DELAY | MCMEN | \ |
| 66 | (packed ? (MCDTXPE|MCDRXPE) : 0); |
| 67 | |
Lars-Peter Clausen | 6344260 | 2013-05-28 19:22:11 +0200 | [diff] [blame] | 68 | sport->regs->mtcs0 = tx_mask; |
| 69 | sport->regs->mrcs0 = rx_mask; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 70 | sport->regs->mtcs1 = 0; |
| 71 | sport->regs->mrcs1 = 0; |
| 72 | sport->regs->mtcs2 = 0; |
| 73 | sport->regs->mrcs2 = 0; |
| 74 | sport->regs->mtcs3 = 0; |
| 75 | sport->regs->mrcs3 = 0; |
| 76 | } else { |
| 77 | sport->regs->mcmc1 = 0; |
| 78 | sport->regs->mcmc2 = 0; |
| 79 | |
| 80 | sport->regs->mtcs0 = 0; |
| 81 | sport->regs->mrcs0 = 0; |
| 82 | } |
| 83 | |
| 84 | sport->regs->mtcs1 = 0; sport->regs->mtcs2 = 0; sport->regs->mtcs3 = 0; |
| 85 | sport->regs->mrcs1 = 0; sport->regs->mrcs2 = 0; sport->regs->mrcs3 = 0; |
| 86 | |
| 87 | SSYNC(); |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | EXPORT_SYMBOL(sport_set_multichannel); |
| 92 | |
| 93 | int sport_config_rx(struct sport_device *sport, unsigned int rcr1, |
| 94 | unsigned int rcr2, unsigned int clkdiv, unsigned int fsdiv) |
| 95 | { |
| 96 | if ((sport->regs->tcr1 & TSPEN) || (sport->regs->rcr1 & RSPEN)) |
| 97 | return -EBUSY; |
| 98 | |
| 99 | sport->regs->rcr1 = rcr1; |
| 100 | sport->regs->rcr2 = rcr2; |
| 101 | sport->regs->rclkdiv = clkdiv; |
| 102 | sport->regs->rfsdiv = fsdiv; |
| 103 | |
| 104 | SSYNC(); |
| 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | EXPORT_SYMBOL(sport_config_rx); |
| 109 | |
| 110 | int sport_config_tx(struct sport_device *sport, unsigned int tcr1, |
| 111 | unsigned int tcr2, unsigned int clkdiv, unsigned int fsdiv) |
| 112 | { |
| 113 | if ((sport->regs->tcr1 & TSPEN) || (sport->regs->rcr1 & RSPEN)) |
| 114 | return -EBUSY; |
| 115 | |
| 116 | sport->regs->tcr1 = tcr1; |
| 117 | sport->regs->tcr2 = tcr2; |
| 118 | sport->regs->tclkdiv = clkdiv; |
| 119 | sport->regs->tfsdiv = fsdiv; |
| 120 | |
| 121 | SSYNC(); |
| 122 | |
| 123 | return 0; |
| 124 | } |
| 125 | EXPORT_SYMBOL(sport_config_tx); |
| 126 | |
| 127 | static void setup_desc(struct dmasg *desc, void *buf, int fragcount, |
| 128 | size_t fragsize, unsigned int cfg, |
| 129 | unsigned int x_count, unsigned int ycount, size_t wdsize) |
| 130 | { |
| 131 | |
| 132 | int i; |
| 133 | |
| 134 | for (i = 0; i < fragcount; ++i) { |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 135 | desc[i].next_desc_addr = &(desc[i + 1]); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 136 | desc[i].start_addr = (unsigned long)buf + i*fragsize; |
| 137 | desc[i].cfg = cfg; |
| 138 | desc[i].x_count = x_count; |
| 139 | desc[i].x_modify = wdsize; |
| 140 | desc[i].y_count = ycount; |
| 141 | desc[i].y_modify = wdsize; |
| 142 | } |
| 143 | |
| 144 | /* make circular */ |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 145 | desc[fragcount-1].next_desc_addr = desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 146 | |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 147 | pr_debug("setup desc: desc0=%p, next0=%p, desc1=%p," |
| 148 | "next1=%p\nx_count=%x,y_count=%x,addr=0x%lx,cfs=0x%x\n", |
| 149 | desc, desc[0].next_desc_addr, |
| 150 | desc+1, desc[1].next_desc_addr, |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 151 | desc[0].x_count, desc[0].y_count, |
| 152 | desc[0].start_addr, desc[0].cfg); |
| 153 | } |
| 154 | |
| 155 | static int sport_start(struct sport_device *sport) |
| 156 | { |
| 157 | enable_dma(sport->dma_rx_chan); |
| 158 | enable_dma(sport->dma_tx_chan); |
| 159 | sport->regs->rcr1 |= RSPEN; |
| 160 | sport->regs->tcr1 |= TSPEN; |
| 161 | SSYNC(); |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int sport_stop(struct sport_device *sport) |
| 167 | { |
| 168 | sport->regs->tcr1 &= ~TSPEN; |
| 169 | sport->regs->rcr1 &= ~RSPEN; |
| 170 | SSYNC(); |
| 171 | |
| 172 | disable_dma(sport->dma_rx_chan); |
| 173 | disable_dma(sport->dma_tx_chan); |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static inline int sport_hook_rx_dummy(struct sport_device *sport) |
| 178 | { |
| 179 | struct dmasg *desc, temp_desc; |
| 180 | unsigned long flags; |
| 181 | |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 182 | if (WARN_ON(!sport->dummy_rx_desc) || |
| 183 | WARN_ON(sport->curr_rx_desc == sport->dummy_rx_desc)) |
| 184 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 185 | |
| 186 | /* Maybe the dummy buffer descriptor ring is damaged */ |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 187 | sport->dummy_rx_desc->next_desc_addr = sport->dummy_rx_desc + 1; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 188 | |
| 189 | local_irq_save(flags); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 190 | desc = get_dma_next_desc_ptr(sport->dma_rx_chan); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 191 | /* Copy the descriptor which will be damaged to backup */ |
| 192 | temp_desc = *desc; |
Cliff Cai | 80d5bd9 | 2009-06-02 00:18:56 -0400 | [diff] [blame] | 193 | desc->x_count = sport->dummy_count / 2; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 194 | desc->y_count = 0; |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 195 | desc->next_desc_addr = sport->dummy_rx_desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 196 | local_irq_restore(flags); |
| 197 | /* Waiting for dummy buffer descriptor is already hooked*/ |
| 198 | while ((get_dma_curr_desc_ptr(sport->dma_rx_chan) - |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 199 | sizeof(struct dmasg)) != sport->dummy_rx_desc) |
| 200 | continue; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 201 | sport->curr_rx_desc = sport->dummy_rx_desc; |
| 202 | /* Restore the damaged descriptor */ |
| 203 | *desc = temp_desc; |
| 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | static inline int sport_rx_dma_start(struct sport_device *sport, int dummy) |
| 209 | { |
| 210 | if (dummy) { |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 211 | sport->dummy_rx_desc->next_desc_addr = sport->dummy_rx_desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 212 | sport->curr_rx_desc = sport->dummy_rx_desc; |
| 213 | } else |
| 214 | sport->curr_rx_desc = sport->dma_rx_desc; |
| 215 | |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 216 | set_dma_next_desc_addr(sport->dma_rx_chan, sport->curr_rx_desc); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 217 | set_dma_x_count(sport->dma_rx_chan, 0); |
| 218 | set_dma_x_modify(sport->dma_rx_chan, 0); |
| 219 | set_dma_config(sport->dma_rx_chan, (DMAFLOW_LARGE | NDSIZE_9 | \ |
| 220 | WDSIZE_32 | WNR)); |
| 221 | set_dma_curr_addr(sport->dma_rx_chan, sport->curr_rx_desc->start_addr); |
| 222 | SSYNC(); |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | static inline int sport_tx_dma_start(struct sport_device *sport, int dummy) |
| 228 | { |
| 229 | if (dummy) { |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 230 | sport->dummy_tx_desc->next_desc_addr = sport->dummy_tx_desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 231 | sport->curr_tx_desc = sport->dummy_tx_desc; |
| 232 | } else |
| 233 | sport->curr_tx_desc = sport->dma_tx_desc; |
| 234 | |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 235 | set_dma_next_desc_addr(sport->dma_tx_chan, sport->curr_tx_desc); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 236 | set_dma_x_count(sport->dma_tx_chan, 0); |
| 237 | set_dma_x_modify(sport->dma_tx_chan, 0); |
| 238 | set_dma_config(sport->dma_tx_chan, |
| 239 | (DMAFLOW_LARGE | NDSIZE_9 | WDSIZE_32)); |
| 240 | set_dma_curr_addr(sport->dma_tx_chan, sport->curr_tx_desc->start_addr); |
| 241 | SSYNC(); |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | int sport_rx_start(struct sport_device *sport) |
| 247 | { |
| 248 | unsigned long flags; |
| 249 | pr_debug("%s enter\n", __func__); |
| 250 | if (sport->rx_run) |
| 251 | return -EBUSY; |
| 252 | if (sport->tx_run) { |
| 253 | /* tx is running, rx is not running */ |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 254 | if (WARN_ON(!sport->dma_rx_desc) || |
| 255 | WARN_ON(sport->curr_rx_desc != sport->dummy_rx_desc)) |
| 256 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 257 | local_irq_save(flags); |
| 258 | while ((get_dma_curr_desc_ptr(sport->dma_rx_chan) - |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 259 | sizeof(struct dmasg)) != sport->dummy_rx_desc) |
| 260 | continue; |
| 261 | sport->dummy_rx_desc->next_desc_addr = sport->dma_rx_desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 262 | local_irq_restore(flags); |
| 263 | sport->curr_rx_desc = sport->dma_rx_desc; |
| 264 | } else { |
| 265 | sport_tx_dma_start(sport, 1); |
| 266 | sport_rx_dma_start(sport, 0); |
| 267 | sport_start(sport); |
| 268 | } |
| 269 | |
| 270 | sport->rx_run = 1; |
| 271 | |
| 272 | return 0; |
| 273 | } |
| 274 | EXPORT_SYMBOL(sport_rx_start); |
| 275 | |
| 276 | int sport_rx_stop(struct sport_device *sport) |
| 277 | { |
| 278 | pr_debug("%s enter\n", __func__); |
| 279 | |
| 280 | if (!sport->rx_run) |
| 281 | return 0; |
| 282 | if (sport->tx_run) { |
| 283 | /* TX dma is still running, hook the dummy buffer */ |
| 284 | sport_hook_rx_dummy(sport); |
| 285 | } else { |
| 286 | /* Both rx and tx dma will be stopped */ |
| 287 | sport_stop(sport); |
| 288 | sport->curr_rx_desc = NULL; |
| 289 | sport->curr_tx_desc = NULL; |
| 290 | } |
| 291 | |
| 292 | sport->rx_run = 0; |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | EXPORT_SYMBOL(sport_rx_stop); |
| 297 | |
| 298 | static inline int sport_hook_tx_dummy(struct sport_device *sport) |
| 299 | { |
| 300 | struct dmasg *desc, temp_desc; |
| 301 | unsigned long flags; |
| 302 | |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 303 | if (WARN_ON(!sport->dummy_tx_desc) || |
| 304 | WARN_ON(sport->curr_tx_desc == sport->dummy_tx_desc)) |
| 305 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 306 | |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 307 | sport->dummy_tx_desc->next_desc_addr = sport->dummy_tx_desc + 1; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 308 | |
| 309 | /* Shorten the time on last normal descriptor */ |
| 310 | local_irq_save(flags); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 311 | desc = get_dma_next_desc_ptr(sport->dma_tx_chan); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 312 | /* Store the descriptor which will be damaged */ |
| 313 | temp_desc = *desc; |
Cliff Cai | 80d5bd9 | 2009-06-02 00:18:56 -0400 | [diff] [blame] | 314 | desc->x_count = sport->dummy_count / 2; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 315 | desc->y_count = 0; |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 316 | desc->next_desc_addr = sport->dummy_tx_desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 317 | local_irq_restore(flags); |
| 318 | /* Waiting for dummy buffer descriptor is already hooked*/ |
| 319 | while ((get_dma_curr_desc_ptr(sport->dma_tx_chan) - \ |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 320 | sizeof(struct dmasg)) != sport->dummy_tx_desc) |
| 321 | continue; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 322 | sport->curr_tx_desc = sport->dummy_tx_desc; |
| 323 | /* Restore the damaged descriptor */ |
| 324 | *desc = temp_desc; |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | int sport_tx_start(struct sport_device *sport) |
| 330 | { |
Mike Frysinger | d75150d | 2009-09-16 20:25:09 -0400 | [diff] [blame] | 331 | unsigned long flags; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 332 | pr_debug("%s: tx_run:%d, rx_run:%d\n", __func__, |
| 333 | sport->tx_run, sport->rx_run); |
| 334 | if (sport->tx_run) |
| 335 | return -EBUSY; |
| 336 | if (sport->rx_run) { |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 337 | if (WARN_ON(!sport->dma_tx_desc) || |
| 338 | WARN_ON(sport->curr_tx_desc != sport->dummy_tx_desc)) |
| 339 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 340 | /* Hook the normal buffer descriptor */ |
| 341 | local_irq_save(flags); |
| 342 | while ((get_dma_curr_desc_ptr(sport->dma_tx_chan) - |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 343 | sizeof(struct dmasg)) != sport->dummy_tx_desc) |
| 344 | continue; |
| 345 | sport->dummy_tx_desc->next_desc_addr = sport->dma_tx_desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 346 | local_irq_restore(flags); |
| 347 | sport->curr_tx_desc = sport->dma_tx_desc; |
| 348 | } else { |
| 349 | |
| 350 | sport_tx_dma_start(sport, 0); |
| 351 | /* Let rx dma run the dummy buffer */ |
| 352 | sport_rx_dma_start(sport, 1); |
| 353 | sport_start(sport); |
| 354 | } |
| 355 | sport->tx_run = 1; |
| 356 | return 0; |
| 357 | } |
| 358 | EXPORT_SYMBOL(sport_tx_start); |
| 359 | |
| 360 | int sport_tx_stop(struct sport_device *sport) |
| 361 | { |
| 362 | if (!sport->tx_run) |
| 363 | return 0; |
| 364 | if (sport->rx_run) { |
| 365 | /* RX is still running, hook the dummy buffer */ |
| 366 | sport_hook_tx_dummy(sport); |
| 367 | } else { |
| 368 | /* Both rx and tx dma stopped */ |
| 369 | sport_stop(sport); |
| 370 | sport->curr_rx_desc = NULL; |
| 371 | sport->curr_tx_desc = NULL; |
| 372 | } |
| 373 | |
| 374 | sport->tx_run = 0; |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | EXPORT_SYMBOL(sport_tx_stop); |
| 379 | |
| 380 | static inline int compute_wdsize(size_t wdsize) |
| 381 | { |
| 382 | switch (wdsize) { |
| 383 | case 1: |
| 384 | return WDSIZE_8; |
| 385 | case 2: |
| 386 | return WDSIZE_16; |
| 387 | case 4: |
| 388 | default: |
| 389 | return WDSIZE_32; |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | int sport_config_rx_dma(struct sport_device *sport, void *buf, |
| 394 | int fragcount, size_t fragsize) |
| 395 | { |
| 396 | unsigned int x_count; |
| 397 | unsigned int y_count; |
| 398 | unsigned int cfg; |
| 399 | dma_addr_t addr; |
| 400 | |
| 401 | pr_debug("%s buf:%p, frag:%d, fragsize:0x%lx\n", __func__, \ |
| 402 | buf, fragcount, fragsize); |
| 403 | |
| 404 | x_count = fragsize / sport->wdsize; |
| 405 | y_count = 0; |
| 406 | |
| 407 | /* for fragments larger than 64k words we use 2d dma, |
| 408 | * denote fragecount as two numbers' mutliply and both of them |
| 409 | * are less than 64k.*/ |
| 410 | if (x_count >= 0x10000) { |
| 411 | int i, count = x_count; |
| 412 | |
| 413 | for (i = 16; i > 0; i--) { |
| 414 | x_count = 1 << i; |
| 415 | if ((count & (x_count - 1)) == 0) { |
| 416 | y_count = count >> i; |
| 417 | if (y_count < 0x10000) |
| 418 | break; |
| 419 | } |
| 420 | } |
| 421 | if (i == 0) |
| 422 | return -EINVAL; |
| 423 | } |
| 424 | pr_debug("%s(x_count:0x%x, y_count:0x%x)\n", __func__, |
| 425 | x_count, y_count); |
| 426 | |
| 427 | if (sport->dma_rx_desc) |
| 428 | dma_free_coherent(NULL, sport->rx_desc_bytes, |
| 429 | sport->dma_rx_desc, 0); |
| 430 | |
| 431 | /* Allocate a new descritor ring as current one. */ |
| 432 | sport->dma_rx_desc = dma_alloc_coherent(NULL, \ |
| 433 | fragcount * sizeof(struct dmasg), &addr, 0); |
| 434 | sport->rx_desc_bytes = fragcount * sizeof(struct dmasg); |
| 435 | |
| 436 | if (!sport->dma_rx_desc) { |
| 437 | pr_err("Failed to allocate memory for rx desc\n"); |
| 438 | return -ENOMEM; |
| 439 | } |
| 440 | |
| 441 | sport->rx_buf = buf; |
| 442 | sport->rx_fragsize = fragsize; |
| 443 | sport->rx_frags = fragcount; |
| 444 | |
| 445 | cfg = 0x7000 | DI_EN | compute_wdsize(sport->wdsize) | WNR | \ |
| 446 | (DESC_ELEMENT_COUNT << 8); /* large descriptor mode */ |
| 447 | |
| 448 | if (y_count != 0) |
| 449 | cfg |= DMA2D; |
| 450 | |
| 451 | setup_desc(sport->dma_rx_desc, buf, fragcount, fragsize, |
| 452 | cfg|DMAEN, x_count, y_count, sport->wdsize); |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | EXPORT_SYMBOL(sport_config_rx_dma); |
| 457 | |
| 458 | int sport_config_tx_dma(struct sport_device *sport, void *buf, \ |
| 459 | int fragcount, size_t fragsize) |
| 460 | { |
| 461 | unsigned int x_count; |
| 462 | unsigned int y_count; |
| 463 | unsigned int cfg; |
| 464 | dma_addr_t addr; |
| 465 | |
| 466 | pr_debug("%s buf:%p, fragcount:%d, fragsize:0x%lx\n", |
| 467 | __func__, buf, fragcount, fragsize); |
| 468 | |
| 469 | x_count = fragsize/sport->wdsize; |
| 470 | y_count = 0; |
| 471 | |
| 472 | /* for fragments larger than 64k words we use 2d dma, |
| 473 | * denote fragecount as two numbers' mutliply and both of them |
| 474 | * are less than 64k.*/ |
| 475 | if (x_count >= 0x10000) { |
| 476 | int i, count = x_count; |
| 477 | |
| 478 | for (i = 16; i > 0; i--) { |
| 479 | x_count = 1 << i; |
| 480 | if ((count & (x_count - 1)) == 0) { |
| 481 | y_count = count >> i; |
| 482 | if (y_count < 0x10000) |
| 483 | break; |
| 484 | } |
| 485 | } |
| 486 | if (i == 0) |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | pr_debug("%s x_count:0x%x, y_count:0x%x\n", __func__, |
| 490 | x_count, y_count); |
| 491 | |
| 492 | |
| 493 | if (sport->dma_tx_desc) { |
| 494 | dma_free_coherent(NULL, sport->tx_desc_bytes, \ |
| 495 | sport->dma_tx_desc, 0); |
| 496 | } |
| 497 | |
| 498 | sport->dma_tx_desc = dma_alloc_coherent(NULL, \ |
| 499 | fragcount * sizeof(struct dmasg), &addr, 0); |
| 500 | sport->tx_desc_bytes = fragcount * sizeof(struct dmasg); |
| 501 | if (!sport->dma_tx_desc) { |
| 502 | pr_err("Failed to allocate memory for tx desc\n"); |
| 503 | return -ENOMEM; |
| 504 | } |
| 505 | |
| 506 | sport->tx_buf = buf; |
| 507 | sport->tx_fragsize = fragsize; |
| 508 | sport->tx_frags = fragcount; |
| 509 | cfg = 0x7000 | DI_EN | compute_wdsize(sport->wdsize) | \ |
| 510 | (DESC_ELEMENT_COUNT << 8); /* large descriptor mode */ |
| 511 | |
| 512 | if (y_count != 0) |
| 513 | cfg |= DMA2D; |
| 514 | |
| 515 | setup_desc(sport->dma_tx_desc, buf, fragcount, fragsize, |
| 516 | cfg|DMAEN, x_count, y_count, sport->wdsize); |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | EXPORT_SYMBOL(sport_config_tx_dma); |
| 521 | |
| 522 | /* setup dummy dma descriptor ring, which don't generate interrupts, |
| 523 | * the x_modify is set to 0 */ |
| 524 | static int sport_config_rx_dummy(struct sport_device *sport) |
| 525 | { |
| 526 | struct dmasg *desc; |
| 527 | unsigned config; |
| 528 | |
| 529 | pr_debug("%s entered\n", __func__); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 530 | if (L1_DATA_A_LENGTH) |
| 531 | desc = l1_data_sram_zalloc(2 * sizeof(*desc)); |
| 532 | else { |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 533 | dma_addr_t addr; |
| 534 | desc = dma_alloc_coherent(NULL, 2 * sizeof(*desc), &addr, 0); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 535 | memset(desc, 0, 2 * sizeof(*desc)); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 536 | } |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 537 | if (desc == NULL) { |
| 538 | pr_err("Failed to allocate memory for dummy rx desc\n"); |
| 539 | return -ENOMEM; |
| 540 | } |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 541 | sport->dummy_rx_desc = desc; |
| 542 | desc->start_addr = (unsigned long)sport->dummy_buf; |
| 543 | config = DMAFLOW_LARGE | NDSIZE_9 | compute_wdsize(sport->wdsize) |
| 544 | | WNR | DMAEN; |
| 545 | desc->cfg = config; |
| 546 | desc->x_count = sport->dummy_count/sport->wdsize; |
| 547 | desc->x_modify = sport->wdsize; |
| 548 | desc->y_count = 0; |
| 549 | desc->y_modify = 0; |
| 550 | memcpy(desc+1, desc, sizeof(*desc)); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 551 | desc->next_desc_addr = desc + 1; |
| 552 | desc[1].next_desc_addr = desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | static int sport_config_tx_dummy(struct sport_device *sport) |
| 557 | { |
| 558 | struct dmasg *desc; |
| 559 | unsigned int config; |
| 560 | |
| 561 | pr_debug("%s entered\n", __func__); |
| 562 | |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 563 | if (L1_DATA_A_LENGTH) |
| 564 | desc = l1_data_sram_zalloc(2 * sizeof(*desc)); |
| 565 | else { |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 566 | dma_addr_t addr; |
| 567 | desc = dma_alloc_coherent(NULL, 2 * sizeof(*desc), &addr, 0); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 568 | memset(desc, 0, 2 * sizeof(*desc)); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 569 | } |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 570 | if (!desc) { |
| 571 | pr_err("Failed to allocate memory for dummy tx desc\n"); |
| 572 | return -ENOMEM; |
| 573 | } |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 574 | sport->dummy_tx_desc = desc; |
| 575 | desc->start_addr = (unsigned long)sport->dummy_buf + \ |
| 576 | sport->dummy_count; |
| 577 | config = DMAFLOW_LARGE | NDSIZE_9 | |
| 578 | compute_wdsize(sport->wdsize) | DMAEN; |
| 579 | desc->cfg = config; |
| 580 | desc->x_count = sport->dummy_count/sport->wdsize; |
| 581 | desc->x_modify = sport->wdsize; |
| 582 | desc->y_count = 0; |
| 583 | desc->y_modify = 0; |
| 584 | memcpy(desc+1, desc, sizeof(*desc)); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 585 | desc->next_desc_addr = desc + 1; |
| 586 | desc[1].next_desc_addr = desc; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | unsigned long sport_curr_offset_rx(struct sport_device *sport) |
| 591 | { |
| 592 | unsigned long curr = get_dma_curr_addr(sport->dma_rx_chan); |
| 593 | |
| 594 | return (unsigned char *)curr - sport->rx_buf; |
| 595 | } |
| 596 | EXPORT_SYMBOL(sport_curr_offset_rx); |
| 597 | |
| 598 | unsigned long sport_curr_offset_tx(struct sport_device *sport) |
| 599 | { |
| 600 | unsigned long curr = get_dma_curr_addr(sport->dma_tx_chan); |
| 601 | |
| 602 | return (unsigned char *)curr - sport->tx_buf; |
| 603 | } |
| 604 | EXPORT_SYMBOL(sport_curr_offset_tx); |
| 605 | |
| 606 | void sport_incfrag(struct sport_device *sport, int *frag, int tx) |
| 607 | { |
| 608 | ++(*frag); |
| 609 | if (tx == 1 && *frag == sport->tx_frags) |
| 610 | *frag = 0; |
| 611 | |
| 612 | if (tx == 0 && *frag == sport->rx_frags) |
| 613 | *frag = 0; |
| 614 | } |
| 615 | EXPORT_SYMBOL(sport_incfrag); |
| 616 | |
| 617 | void sport_decfrag(struct sport_device *sport, int *frag, int tx) |
| 618 | { |
| 619 | --(*frag); |
| 620 | if (tx == 1 && *frag == 0) |
| 621 | *frag = sport->tx_frags; |
| 622 | |
| 623 | if (tx == 0 && *frag == 0) |
| 624 | *frag = sport->rx_frags; |
| 625 | } |
| 626 | EXPORT_SYMBOL(sport_decfrag); |
| 627 | |
| 628 | static int sport_check_status(struct sport_device *sport, |
| 629 | unsigned int *sport_stat, |
| 630 | unsigned int *rx_stat, |
| 631 | unsigned int *tx_stat) |
| 632 | { |
| 633 | int status = 0; |
| 634 | |
| 635 | if (sport_stat) { |
| 636 | SSYNC(); |
| 637 | status = sport->regs->stat; |
| 638 | if (status & (TOVF|TUVF|ROVF|RUVF)) |
| 639 | sport->regs->stat = (status & (TOVF|TUVF|ROVF|RUVF)); |
| 640 | SSYNC(); |
| 641 | *sport_stat = status; |
| 642 | } |
| 643 | |
| 644 | if (rx_stat) { |
| 645 | SSYNC(); |
| 646 | status = get_dma_curr_irqstat(sport->dma_rx_chan); |
| 647 | if (status & (DMA_DONE|DMA_ERR)) |
| 648 | clear_dma_irqstat(sport->dma_rx_chan); |
| 649 | SSYNC(); |
| 650 | *rx_stat = status; |
| 651 | } |
| 652 | |
| 653 | if (tx_stat) { |
| 654 | SSYNC(); |
| 655 | status = get_dma_curr_irqstat(sport->dma_tx_chan); |
| 656 | if (status & (DMA_DONE|DMA_ERR)) |
| 657 | clear_dma_irqstat(sport->dma_tx_chan); |
| 658 | SSYNC(); |
| 659 | *tx_stat = status; |
| 660 | } |
| 661 | |
| 662 | return 0; |
| 663 | } |
| 664 | |
| 665 | int sport_dump_stat(struct sport_device *sport, char *buf, size_t len) |
| 666 | { |
| 667 | int ret; |
| 668 | |
| 669 | ret = snprintf(buf, len, |
| 670 | "sts: 0x%04x\n" |
| 671 | "rx dma %d sts: 0x%04x tx dma %d sts: 0x%04x\n", |
| 672 | sport->regs->stat, |
| 673 | sport->dma_rx_chan, |
| 674 | get_dma_curr_irqstat(sport->dma_rx_chan), |
| 675 | sport->dma_tx_chan, |
| 676 | get_dma_curr_irqstat(sport->dma_tx_chan)); |
| 677 | buf += ret; |
| 678 | len -= ret; |
| 679 | |
| 680 | ret += snprintf(buf, len, |
| 681 | "curr_rx_desc:0x%p, curr_tx_desc:0x%p\n" |
| 682 | "dma_rx_desc:0x%p, dma_tx_desc:0x%p\n" |
| 683 | "dummy_rx_desc:0x%p, dummy_tx_desc:0x%p\n", |
| 684 | sport->curr_rx_desc, sport->curr_tx_desc, |
| 685 | sport->dma_rx_desc, sport->dma_tx_desc, |
| 686 | sport->dummy_rx_desc, sport->dummy_tx_desc); |
| 687 | |
| 688 | return ret; |
| 689 | } |
| 690 | |
| 691 | static irqreturn_t rx_handler(int irq, void *dev_id) |
| 692 | { |
| 693 | unsigned int rx_stat; |
| 694 | struct sport_device *sport = dev_id; |
| 695 | |
| 696 | pr_debug("%s enter\n", __func__); |
| 697 | sport_check_status(sport, NULL, &rx_stat, NULL); |
| 698 | if (!(rx_stat & DMA_DONE)) |
| 699 | pr_err("rx dma is already stopped\n"); |
| 700 | |
| 701 | if (sport->rx_callback) { |
| 702 | sport->rx_callback(sport->rx_data); |
| 703 | return IRQ_HANDLED; |
| 704 | } |
| 705 | |
| 706 | return IRQ_NONE; |
| 707 | } |
| 708 | |
| 709 | static irqreturn_t tx_handler(int irq, void *dev_id) |
| 710 | { |
| 711 | unsigned int tx_stat; |
| 712 | struct sport_device *sport = dev_id; |
| 713 | pr_debug("%s enter\n", __func__); |
| 714 | sport_check_status(sport, NULL, NULL, &tx_stat); |
| 715 | if (!(tx_stat & DMA_DONE)) { |
| 716 | pr_err("tx dma is already stopped\n"); |
| 717 | return IRQ_HANDLED; |
| 718 | } |
| 719 | if (sport->tx_callback) { |
| 720 | sport->tx_callback(sport->tx_data); |
| 721 | return IRQ_HANDLED; |
| 722 | } |
| 723 | |
| 724 | return IRQ_NONE; |
| 725 | } |
| 726 | |
| 727 | static irqreturn_t err_handler(int irq, void *dev_id) |
| 728 | { |
| 729 | unsigned int status = 0; |
| 730 | struct sport_device *sport = dev_id; |
| 731 | |
| 732 | pr_debug("%s\n", __func__); |
| 733 | if (sport_check_status(sport, &status, NULL, NULL)) { |
| 734 | pr_err("error checking status ??"); |
| 735 | return IRQ_NONE; |
| 736 | } |
| 737 | |
| 738 | if (status & (TOVF|TUVF|ROVF|RUVF)) { |
| 739 | pr_info("sport status error:%s%s%s%s\n", |
| 740 | status & TOVF ? " TOVF" : "", |
| 741 | status & TUVF ? " TUVF" : "", |
| 742 | status & ROVF ? " ROVF" : "", |
| 743 | status & RUVF ? " RUVF" : ""); |
| 744 | if (status & TOVF || status & TUVF) { |
| 745 | disable_dma(sport->dma_tx_chan); |
| 746 | if (sport->tx_run) |
| 747 | sport_tx_dma_start(sport, 0); |
| 748 | else |
| 749 | sport_tx_dma_start(sport, 1); |
| 750 | enable_dma(sport->dma_tx_chan); |
| 751 | } else { |
| 752 | disable_dma(sport->dma_rx_chan); |
| 753 | if (sport->rx_run) |
| 754 | sport_rx_dma_start(sport, 0); |
| 755 | else |
| 756 | sport_rx_dma_start(sport, 1); |
| 757 | enable_dma(sport->dma_rx_chan); |
| 758 | } |
| 759 | } |
| 760 | status = sport->regs->stat; |
| 761 | if (status & (TOVF|TUVF|ROVF|RUVF)) |
| 762 | sport->regs->stat = (status & (TOVF|TUVF|ROVF|RUVF)); |
| 763 | SSYNC(); |
| 764 | |
| 765 | if (sport->err_callback) |
| 766 | sport->err_callback(sport->err_data); |
| 767 | |
| 768 | return IRQ_HANDLED; |
| 769 | } |
| 770 | |
| 771 | int sport_set_rx_callback(struct sport_device *sport, |
| 772 | void (*rx_callback)(void *), void *rx_data) |
| 773 | { |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 774 | if (WARN_ON(!rx_callback)) |
| 775 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 776 | sport->rx_callback = rx_callback; |
| 777 | sport->rx_data = rx_data; |
| 778 | |
| 779 | return 0; |
| 780 | } |
| 781 | EXPORT_SYMBOL(sport_set_rx_callback); |
| 782 | |
| 783 | int sport_set_tx_callback(struct sport_device *sport, |
| 784 | void (*tx_callback)(void *), void *tx_data) |
| 785 | { |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 786 | if (WARN_ON(!tx_callback)) |
| 787 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 788 | sport->tx_callback = tx_callback; |
| 789 | sport->tx_data = tx_data; |
| 790 | |
| 791 | return 0; |
| 792 | } |
| 793 | EXPORT_SYMBOL(sport_set_tx_callback); |
| 794 | |
| 795 | int sport_set_err_callback(struct sport_device *sport, |
| 796 | void (*err_callback)(void *), void *err_data) |
| 797 | { |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 798 | if (WARN_ON(!err_callback)) |
| 799 | return -EINVAL; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 800 | sport->err_callback = err_callback; |
| 801 | sport->err_data = err_data; |
| 802 | |
| 803 | return 0; |
| 804 | } |
| 805 | EXPORT_SYMBOL(sport_set_err_callback); |
| 806 | |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 807 | static int sport_config_pdev(struct platform_device *pdev, struct sport_param *param) |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 808 | { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 809 | /* Extract settings from platform data */ |
| 810 | struct device *dev = &pdev->dev; |
| 811 | struct bfin_snd_platform_data *pdata = dev->platform_data; |
| 812 | struct resource *res; |
| 813 | |
| 814 | param->num = pdev->id; |
| 815 | |
| 816 | if (!pdata) { |
| 817 | dev_err(dev, "no platform_data\n"); |
| 818 | return -ENODEV; |
| 819 | } |
| 820 | param->pin_req = pdata->pin_req; |
| 821 | |
| 822 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 823 | if (!res) { |
| 824 | dev_err(dev, "no MEM resource\n"); |
| 825 | return -ENODEV; |
| 826 | } |
| 827 | param->regs = (struct sport_register *)res->start; |
| 828 | |
| 829 | /* first RX, then TX */ |
| 830 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 831 | if (!res) { |
| 832 | dev_err(dev, "no rx DMA resource\n"); |
| 833 | return -ENODEV; |
| 834 | } |
| 835 | param->dma_rx_chan = res->start; |
| 836 | |
| 837 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| 838 | if (!res) { |
| 839 | dev_err(dev, "no tx DMA resource\n"); |
| 840 | return -ENODEV; |
| 841 | } |
| 842 | param->dma_tx_chan = res->start; |
| 843 | |
| 844 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 845 | if (!res) { |
| 846 | dev_err(dev, "no irq resource\n"); |
| 847 | return -ENODEV; |
| 848 | } |
| 849 | param->err_irq = res->start; |
| 850 | |
| 851 | return 0; |
| 852 | } |
| 853 | |
| 854 | struct sport_device *sport_init(struct platform_device *pdev, |
| 855 | unsigned int wdsize, unsigned int dummy_count, size_t priv_size) |
| 856 | { |
| 857 | struct device *dev = &pdev->dev; |
| 858 | struct sport_param param; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 859 | struct sport_device *sport; |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 860 | int ret; |
| 861 | |
| 862 | dev_dbg(dev, "%s enter\n", __func__); |
| 863 | |
| 864 | param.wdsize = wdsize; |
| 865 | param.dummy_count = dummy_count; |
Takashi Iwai | ddb146d | 2013-11-05 18:39:48 +0100 | [diff] [blame] | 866 | if (WARN_ON(param.wdsize == 0 || param.dummy_count == 0)) |
| 867 | return NULL; |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 868 | |
| 869 | ret = sport_config_pdev(pdev, ¶m); |
| 870 | if (ret) |
| 871 | return NULL; |
| 872 | |
| 873 | if (peripheral_request_list(param.pin_req, "soc-audio")) { |
| 874 | dev_err(dev, "requesting Peripherals failed\n"); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 875 | return NULL; |
| 876 | } |
| 877 | |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 878 | sport = kzalloc(sizeof(*sport), GFP_KERNEL); |
| 879 | if (!sport) { |
| 880 | dev_err(dev, "failed to allocate for sport device\n"); |
| 881 | goto __init_err0; |
| 882 | } |
| 883 | |
| 884 | sport->num = param.num; |
| 885 | sport->dma_rx_chan = param.dma_rx_chan; |
| 886 | sport->dma_tx_chan = param.dma_tx_chan; |
| 887 | sport->err_irq = param.err_irq; |
| 888 | sport->regs = param.regs; |
| 889 | sport->pin_req = param.pin_req; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 890 | |
| 891 | if (request_dma(sport->dma_rx_chan, "SPORT RX Data") == -EBUSY) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 892 | dev_err(dev, "failed to request RX dma %d\n", sport->dma_rx_chan); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 893 | goto __init_err1; |
| 894 | } |
| 895 | if (set_dma_callback(sport->dma_rx_chan, rx_handler, sport) != 0) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 896 | dev_err(dev, "failed to request RX irq %d\n", sport->dma_rx_chan); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 897 | goto __init_err2; |
| 898 | } |
| 899 | |
| 900 | if (request_dma(sport->dma_tx_chan, "SPORT TX Data") == -EBUSY) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 901 | dev_err(dev, "failed to request TX dma %d\n", sport->dma_tx_chan); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 902 | goto __init_err2; |
| 903 | } |
| 904 | |
| 905 | if (set_dma_callback(sport->dma_tx_chan, tx_handler, sport) != 0) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 906 | dev_err(dev, "failed to request TX irq %d\n", sport->dma_tx_chan); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 907 | goto __init_err3; |
| 908 | } |
| 909 | |
| 910 | if (request_irq(sport->err_irq, err_handler, IRQF_SHARED, "SPORT err", |
| 911 | sport) < 0) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 912 | dev_err(dev, "failed to request err irq %d\n", sport->err_irq); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 913 | goto __init_err3; |
| 914 | } |
| 915 | |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 916 | dev_info(dev, "dma rx:%d tx:%d, err irq:%d, regs:%p\n", |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 917 | sport->dma_rx_chan, sport->dma_tx_chan, |
| 918 | sport->err_irq, sport->regs); |
| 919 | |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 920 | sport->wdsize = param.wdsize; |
| 921 | sport->dummy_count = param.dummy_count; |
| 922 | |
| 923 | sport->private_data = kzalloc(priv_size, GFP_KERNEL); |
| 924 | if (!sport->private_data) { |
| 925 | dev_err(dev, "could not alloc priv data %zu bytes\n", priv_size); |
| 926 | goto __init_err4; |
| 927 | } |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 928 | |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 929 | if (L1_DATA_A_LENGTH) |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 930 | sport->dummy_buf = l1_data_sram_zalloc(param.dummy_count * 2); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 931 | else |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 932 | sport->dummy_buf = kzalloc(param.dummy_count * 2, GFP_KERNEL); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 933 | if (sport->dummy_buf == NULL) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 934 | dev_err(dev, "failed to allocate dummy buffer\n"); |
| 935 | goto __error1; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 936 | } |
| 937 | |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 938 | ret = sport_config_rx_dummy(sport); |
| 939 | if (ret) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 940 | dev_err(dev, "failed to config rx dummy ring\n"); |
| 941 | goto __error2; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 942 | } |
| 943 | ret = sport_config_tx_dummy(sport); |
| 944 | if (ret) { |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 945 | dev_err(dev, "failed to config tx dummy ring\n"); |
| 946 | goto __error3; |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 947 | } |
| 948 | |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 949 | platform_set_drvdata(pdev, sport); |
| 950 | |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 951 | return sport; |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 952 | __error3: |
| 953 | if (L1_DATA_A_LENGTH) |
| 954 | l1_data_sram_free(sport->dummy_rx_desc); |
| 955 | else |
| 956 | dma_free_coherent(NULL, 2*sizeof(struct dmasg), |
| 957 | sport->dummy_rx_desc, 0); |
| 958 | __error2: |
| 959 | if (L1_DATA_A_LENGTH) |
| 960 | l1_data_sram_free(sport->dummy_buf); |
| 961 | else |
| 962 | kfree(sport->dummy_buf); |
| 963 | __error1: |
| 964 | kfree(sport->private_data); |
| 965 | __init_err4: |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 966 | free_irq(sport->err_irq, sport); |
| 967 | __init_err3: |
| 968 | free_dma(sport->dma_tx_chan); |
| 969 | __init_err2: |
| 970 | free_dma(sport->dma_rx_chan); |
| 971 | __init_err1: |
| 972 | kfree(sport); |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 973 | __init_err0: |
| 974 | peripheral_free_list(param.pin_req); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 975 | return NULL; |
| 976 | } |
| 977 | EXPORT_SYMBOL(sport_init); |
| 978 | |
| 979 | void sport_done(struct sport_device *sport) |
| 980 | { |
| 981 | if (sport == NULL) |
| 982 | return; |
| 983 | |
| 984 | sport_stop(sport); |
| 985 | if (sport->dma_rx_desc) |
| 986 | dma_free_coherent(NULL, sport->rx_desc_bytes, |
| 987 | sport->dma_rx_desc, 0); |
| 988 | if (sport->dma_tx_desc) |
| 989 | dma_free_coherent(NULL, sport->tx_desc_bytes, |
| 990 | sport->dma_tx_desc, 0); |
| 991 | |
| 992 | #if L1_DATA_A_LENGTH != 0 |
| 993 | l1_data_sram_free(sport->dummy_rx_desc); |
| 994 | l1_data_sram_free(sport->dummy_tx_desc); |
| 995 | l1_data_sram_free(sport->dummy_buf); |
| 996 | #else |
| 997 | dma_free_coherent(NULL, 2*sizeof(struct dmasg), |
| 998 | sport->dummy_rx_desc, 0); |
| 999 | dma_free_coherent(NULL, 2*sizeof(struct dmasg), |
| 1000 | sport->dummy_tx_desc, 0); |
| 1001 | kfree(sport->dummy_buf); |
| 1002 | #endif |
| 1003 | free_dma(sport->dma_rx_chan); |
| 1004 | free_dma(sport->dma_tx_chan); |
| 1005 | free_irq(sport->err_irq, sport); |
| 1006 | |
Barry Song | 2c66cb9 | 2011-03-28 01:45:10 -0400 | [diff] [blame] | 1007 | kfree(sport->private_data); |
| 1008 | peripheral_free_list(sport->pin_req); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 1009 | kfree(sport); |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 1010 | } |
| 1011 | EXPORT_SYMBOL(sport_done); |
Mike Frysinger | 8836c27 | 2009-02-06 18:12:35 +0800 | [diff] [blame] | 1012 | |
Cliff Cai | 8c9c198 | 2008-09-05 18:21:35 +0800 | [diff] [blame] | 1013 | /* |
| 1014 | * It is only used to send several bytes when dma is not enabled |
| 1015 | * sport controller is configured but not enabled. |
| 1016 | * Multichannel cannot works with pio mode */ |
| 1017 | /* Used by ac97 to write and read codec register */ |
| 1018 | int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \ |
| 1019 | u8 *in_data, int len) |
| 1020 | { |
| 1021 | unsigned short dma_config; |
| 1022 | unsigned short status; |
| 1023 | unsigned long flags; |
| 1024 | unsigned long wait = 0; |
| 1025 | |
| 1026 | pr_debug("%s enter, out_data:%p, in_data:%p len:%d\n", \ |
| 1027 | __func__, out_data, in_data, len); |
| 1028 | pr_debug("tcr1:0x%04x, tcr2:0x%04x, tclkdiv:0x%04x, tfsdiv:0x%04x\n" |
| 1029 | "mcmc1:0x%04x, mcmc2:0x%04x\n", |
| 1030 | sport->regs->tcr1, sport->regs->tcr2, |
| 1031 | sport->regs->tclkdiv, sport->regs->tfsdiv, |
| 1032 | sport->regs->mcmc1, sport->regs->mcmc2); |
| 1033 | flush_dcache_range((unsigned)out_data, (unsigned)(out_data + len)); |
| 1034 | |
| 1035 | /* Enable tx dma */ |
| 1036 | dma_config = (RESTART | WDSIZE_16 | DI_EN); |
| 1037 | set_dma_start_addr(sport->dma_tx_chan, (unsigned long)out_data); |
| 1038 | set_dma_x_count(sport->dma_tx_chan, len/2); |
| 1039 | set_dma_x_modify(sport->dma_tx_chan, 2); |
| 1040 | set_dma_config(sport->dma_tx_chan, dma_config); |
| 1041 | enable_dma(sport->dma_tx_chan); |
| 1042 | |
| 1043 | if (in_data != NULL) { |
| 1044 | invalidate_dcache_range((unsigned)in_data, \ |
| 1045 | (unsigned)(in_data + len)); |
| 1046 | /* Enable rx dma */ |
| 1047 | dma_config = (RESTART | WDSIZE_16 | WNR | DI_EN); |
| 1048 | set_dma_start_addr(sport->dma_rx_chan, (unsigned long)in_data); |
| 1049 | set_dma_x_count(sport->dma_rx_chan, len/2); |
| 1050 | set_dma_x_modify(sport->dma_rx_chan, 2); |
| 1051 | set_dma_config(sport->dma_rx_chan, dma_config); |
| 1052 | enable_dma(sport->dma_rx_chan); |
| 1053 | } |
| 1054 | |
| 1055 | local_irq_save(flags); |
| 1056 | sport->regs->tcr1 |= TSPEN; |
| 1057 | sport->regs->rcr1 |= RSPEN; |
| 1058 | SSYNC(); |
| 1059 | |
| 1060 | status = get_dma_curr_irqstat(sport->dma_tx_chan); |
| 1061 | while (status & DMA_RUN) { |
| 1062 | udelay(1); |
| 1063 | status = get_dma_curr_irqstat(sport->dma_tx_chan); |
| 1064 | pr_debug("DMA status:0x%04x\n", status); |
| 1065 | if (wait++ > 100) |
| 1066 | goto __over; |
| 1067 | } |
| 1068 | status = sport->regs->stat; |
| 1069 | wait = 0; |
| 1070 | |
| 1071 | while (!(status & TXHRE)) { |
| 1072 | pr_debug("sport status:0x%04x\n", status); |
| 1073 | udelay(1); |
| 1074 | status = *(unsigned short *)&sport->regs->stat; |
| 1075 | if (wait++ > 1000) |
| 1076 | goto __over; |
| 1077 | } |
| 1078 | /* Wait for the last byte sent out */ |
| 1079 | udelay(20); |
| 1080 | pr_debug("sport status:0x%04x\n", status); |
| 1081 | |
| 1082 | __over: |
| 1083 | sport->regs->tcr1 &= ~TSPEN; |
| 1084 | sport->regs->rcr1 &= ~RSPEN; |
| 1085 | SSYNC(); |
| 1086 | disable_dma(sport->dma_tx_chan); |
| 1087 | /* Clear the status */ |
| 1088 | clear_dma_irqstat(sport->dma_tx_chan); |
| 1089 | if (in_data != NULL) { |
| 1090 | disable_dma(sport->dma_rx_chan); |
| 1091 | clear_dma_irqstat(sport->dma_rx_chan); |
| 1092 | } |
| 1093 | SSYNC(); |
| 1094 | local_irq_restore(flags); |
| 1095 | |
| 1096 | return 0; |
| 1097 | } |
| 1098 | EXPORT_SYMBOL(sport_send_and_recv); |
| 1099 | |
| 1100 | MODULE_AUTHOR("Roy Huang"); |
| 1101 | MODULE_DESCRIPTION("SPORT driver for ADI Blackfin"); |
| 1102 | MODULE_LICENSE("GPL"); |