diff options
Diffstat (limited to 'sound/soc/blackfin/bf5xx-sport.c')
| -rw-r--r-- | sound/soc/blackfin/bf5xx-sport.c | 1102 |
1 files changed, 0 insertions, 1102 deletions
diff --git a/sound/soc/blackfin/bf5xx-sport.c b/sound/soc/blackfin/bf5xx-sport.c deleted file mode 100644 index 9dfa1241ea66..000000000000 --- a/sound/soc/blackfin/bf5xx-sport.c +++ /dev/null @@ -1,1102 +0,0 @@ -/* - * File: bf5xx_sport.c - * Based on: - * Author: Roy Huang <roy.huang@analog.com> - * - * Created: Tue Sep 21 10:52:42 CEST 2004 - * Description: - * Blackfin SPORT Driver - * - * Copyright 2004-2007 Analog Devices Inc. - * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/dma-mapping.h> -#include <linux/gpio.h> -#include <linux/bug.h> -#include <linux/module.h> -#include <asm/portmux.h> -#include <asm/dma.h> -#include <asm/blackfin.h> -#include <asm/cacheflush.h> - -#include "bf5xx-sport.h" -/* delay between frame sync pulse and first data bit in multichannel mode */ -#define FRAME_DELAY (1<<12) - -/* note: multichannel is in units of 8 channels, - * tdm_count is # channels NOT / 8 ! */ -int sport_set_multichannel(struct sport_device *sport, - int tdm_count, u32 tx_mask, u32 rx_mask, int packed) -{ - pr_debug("%s tdm_count=%d tx_mask:0x%08x rx_mask:0x%08x packed=%d\n", - __func__, tdm_count, tx_mask, rx_mask, packed); - - if ((sport->regs->tcr1 & TSPEN) || (sport->regs->rcr1 & RSPEN)) - return -EBUSY; - - if (tdm_count & 0x7) - return -EINVAL; - - if (tdm_count > 32) - return -EINVAL; /* Only support less than 32 channels now */ - - if (tdm_count) { - sport->regs->mcmc1 = ((tdm_count>>3)-1) << 12; - sport->regs->mcmc2 = FRAME_DELAY | MCMEN | \ - (packed ? (MCDTXPE|MCDRXPE) : 0); - - sport->regs->mtcs0 = tx_mask; - sport->regs->mrcs0 = rx_mask; - sport->regs->mtcs1 = 0; - sport->regs->mrcs1 = 0; - sport->regs->mtcs2 = 0; - sport->regs->mrcs2 = 0; - sport->regs->mtcs3 = 0; - sport->regs->mrcs3 = 0; - } else { - sport->regs->mcmc1 = 0; - sport->regs->mcmc2 = 0; - - sport->regs->mtcs0 = 0; - sport->regs->mrcs0 = 0; - } - - sport->regs->mtcs1 = 0; sport->regs->mtcs2 = 0; sport->regs->mtcs3 = 0; - sport->regs->mrcs1 = 0; sport->regs->mrcs2 = 0; sport->regs->mrcs3 = 0; - - SSYNC(); - - return 0; -} -EXPORT_SYMBOL(sport_set_multichannel); - -int sport_config_rx(struct sport_device *sport, unsigned int rcr1, - unsigned int rcr2, unsigned int clkdiv, unsigned int fsdiv) -{ - if ((sport->regs->tcr1 & TSPEN) || (sport->regs->rcr1 & RSPEN)) - return -EBUSY; - - sport->regs->rcr1 = rcr1; - sport->regs->rcr2 = rcr2; - sport->regs->rclkdiv = clkdiv; - sport->regs->rfsdiv = fsdiv; - - SSYNC(); - - return 0; -} -EXPORT_SYMBOL(sport_config_rx); - -int sport_config_tx(struct sport_device *sport, unsigned int tcr1, - unsigned int tcr2, unsigned int clkdiv, unsigned int fsdiv) -{ - if ((sport->regs->tcr1 & TSPEN) || (sport->regs->rcr1 & RSPEN)) - return -EBUSY; - - sport->regs->tcr1 = tcr1; - sport->regs->tcr2 = tcr2; - sport->regs->tclkdiv = clkdiv; - sport->regs->tfsdiv = fsdiv; - - SSYNC(); - - return 0; -} -EXPORT_SYMBOL(sport_config_tx); - -static void setup_desc(struct dmasg *desc, void *buf, int fragcount, - size_t fragsize, unsigned int cfg, - unsigned int x_count, unsigned int ycount, size_t wdsize) -{ - - int i; - - for (i = 0; i < fragcount; ++i) { - desc[i].next_desc_addr = &(desc[i + 1]); - desc[i].start_addr = (unsigned long)buf + i*fragsize; - desc[i].cfg = cfg; - desc[i].x_count = x_count; - desc[i].x_modify = wdsize; - desc[i].y_count = ycount; - desc[i].y_modify = wdsize; - } - - /* make circular */ - desc[fragcount-1].next_desc_addr = desc; - - pr_debug("setup desc: desc0=%p, next0=%p, desc1=%p," - "next1=%p\nx_count=%x,y_count=%x,addr=0x%lx,cfs=0x%x\n", - desc, desc[0].next_desc_addr, - desc+1, desc[1].next_desc_addr, - desc[0].x_count, desc[0].y_count, - desc[0].start_addr, desc[0].cfg); -} - -static int sport_start(struct sport_device *sport) -{ - enable_dma(sport->dma_rx_chan); - enable_dma(sport->dma_tx_chan); - sport->regs->rcr1 |= RSPEN; - sport->regs->tcr1 |= TSPEN; - SSYNC(); - - return 0; -} - -static int sport_stop(struct sport_device *sport) -{ - sport->regs->tcr1 &= ~TSPEN; - sport->regs->rcr1 &= ~RSPEN; - SSYNC(); - - disable_dma(sport->dma_rx_chan); - disable_dma(sport->dma_tx_chan); - return 0; -} - -static inline int sport_hook_rx_dummy(struct sport_device *sport) -{ - struct dmasg *desc, temp_desc; - unsigned long flags; - - if (WARN_ON(!sport->dummy_rx_desc) || - WARN_ON(sport->curr_rx_desc == sport->dummy_rx_desc)) - return -EINVAL; - - /* Maybe the dummy buffer descriptor ring is damaged */ - sport->dummy_rx_desc->next_desc_addr = sport->dummy_rx_desc + 1; - - local_irq_save(flags); - desc = get_dma_next_desc_ptr(sport->dma_rx_chan); - /* Copy the descriptor which will be damaged to backup */ - temp_desc = *desc; - desc->x_count = sport->dummy_count / 2; - desc->y_count = 0; - desc->next_desc_addr = sport->dummy_rx_desc; - local_irq_restore(flags); - /* Waiting for dummy buffer descriptor is already hooked*/ - while ((get_dma_curr_desc_ptr(sport->dma_rx_chan) - - sizeof(struct dmasg)) != sport->dummy_rx_desc) - continue; - sport->curr_rx_desc = sport->dummy_rx_desc; - /* Restore the damaged descriptor */ - *desc = temp_desc; - - return 0; -} - -static inline int sport_rx_dma_start(struct sport_device *sport, int dummy) -{ - if (dummy) { - sport->dummy_rx_desc->next_desc_addr = sport->dummy_rx_desc; - sport->curr_rx_desc = sport->dummy_rx_desc; - } else - sport->curr_rx_desc = sport->dma_rx_desc; - - set_dma_next_desc_addr(sport->dma_rx_chan, sport->curr_rx_desc); - set_dma_x_count(sport->dma_rx_chan, 0); - set_dma_x_modify(sport->dma_rx_chan, 0); - set_dma_config(sport->dma_rx_chan, (DMAFLOW_LARGE | NDSIZE_9 | \ - WDSIZE_32 | WNR)); - set_dma_curr_addr(sport->dma_rx_chan, sport->curr_rx_desc->start_addr); - SSYNC(); - - return 0; -} - -static inline int sport_tx_dma_start(struct sport_device *sport, int dummy) -{ - if (dummy) { - sport->dummy_tx_desc->next_desc_addr = sport->dummy_tx_desc; - sport->curr_tx_desc = sport->dummy_tx_desc; - } else - sport->curr_tx_desc = sport->dma_tx_desc; - - set_dma_next_desc_addr(sport->dma_tx_chan, sport->curr_tx_desc); - set_dma_x_count(sport->dma_tx_chan, 0); - set_dma_x_modify(sport->dma_tx_chan, 0); - set_dma_config(sport->dma_tx_chan, - (DMAFLOW_LARGE | NDSIZE_9 | WDSIZE_32)); - set_dma_curr_addr(sport->dma_tx_chan, sport->curr_tx_desc->start_addr); - SSYNC(); - - return 0; -} - -int sport_rx_start(struct sport_device *sport) -{ - unsigned long flags; - pr_debug("%s enter\n", __func__); - if (sport->rx_run) - return -EBUSY; - if (sport->tx_run) { - /* tx is running, rx is not running */ - if (WARN_ON(!sport->dma_rx_desc) || - WARN_ON(sport->curr_rx_desc != sport->dummy_rx_desc)) - return -EINVAL; - local_irq_save(flags); - while ((get_dma_curr_desc_ptr(sport->dma_rx_chan) - - sizeof(struct dmasg)) != sport->dummy_rx_desc) - continue; - sport->dummy_rx_desc->next_desc_addr = sport->dma_rx_desc; - local_irq_restore(flags); - sport->curr_rx_desc = sport->dma_rx_desc; - } else { - sport_tx_dma_start(sport, 1); - sport_rx_dma_start(sport, 0); - sport_start(sport); - } - - sport->rx_run = 1; - - return 0; -} -EXPORT_SYMBOL(sport_rx_start); - -int sport_rx_stop(struct sport_device *sport) -{ - pr_debug("%s enter\n", __func__); - - if (!sport->rx_run) - return 0; - if (sport->tx_run) { - /* TX dma is still running, hook the dummy buffer */ - sport_hook_rx_dummy(sport); - } else { - /* Both rx and tx dma will be stopped */ - sport_stop(sport); - sport->curr_rx_desc = NULL; - sport->curr_tx_desc = NULL; - } - - sport->rx_run = 0; - - return 0; -} -EXPORT_SYMBOL(sport_rx_stop); - -static inline int sport_hook_tx_dummy(struct sport_device *sport) -{ - struct dmasg *desc, temp_desc; - unsigned long flags; - - if (WARN_ON(!sport->dummy_tx_desc) || - WARN_ON(sport->curr_tx_desc == sport->dummy_tx_desc)) - return -EINVAL; - - sport->dummy_tx_desc->next_desc_addr = sport->dummy_tx_desc + 1; - - /* Shorten the time on last normal descriptor */ - local_irq_save(flags); - desc = get_dma_next_desc_ptr(sport->dma_tx_chan); - /* Store the descriptor which will be damaged */ - temp_desc = *desc; - desc->x_count = sport->dummy_count / 2; - desc->y_count = 0; - desc->next_desc_addr = sport->dummy_tx_desc; - local_irq_restore(flags); - /* Waiting for dummy buffer descriptor is already hooked*/ - while ((get_dma_curr_desc_ptr(sport->dma_tx_chan) - \ - sizeof(struct dmasg)) != sport->dummy_tx_desc) - continue; - sport->curr_tx_desc = sport->dummy_tx_desc; - /* Restore the damaged descriptor */ - *desc = temp_desc; - - return 0; -} - -int sport_tx_start(struct sport_device *sport) -{ - unsigned long flags; - pr_debug("%s: tx_run:%d, rx_run:%d\n", __func__, - sport->tx_run, sport->rx_run); - if (sport->tx_run) - return -EBUSY; - if (sport->rx_run) { - if (WARN_ON(!sport->dma_tx_desc) || - WARN_ON(sport->curr_tx_desc != sport->dummy_tx_desc)) - return -EINVAL; - /* Hook the normal buffer descriptor */ - local_irq_save(flags); - while ((get_dma_curr_desc_ptr(sport->dma_tx_chan) - - sizeof(struct dmasg)) != sport->dummy_tx_desc) - continue; - sport->dummy_tx_desc->next_desc_addr = sport->dma_tx_desc; - local_irq_restore(flags); - sport->curr_tx_desc = sport->dma_tx_desc; - } else { - - sport_tx_dma_start(sport, 0); - /* Let rx dma run the dummy buffer */ - sport_rx_dma_start(sport, 1); - sport_start(sport); - } - sport->tx_run = 1; - return 0; -} -EXPORT_SYMBOL(sport_tx_start); - -int sport_tx_stop(struct sport_device *sport) -{ - if (!sport->tx_run) - return 0; - if (sport->rx_run) { - /* RX is still running, hook the dummy buffer */ - sport_hook_tx_dummy(sport); - } else { - /* Both rx and tx dma stopped */ - sport_stop(sport); - sport->curr_rx_desc = NULL; - sport->curr_tx_desc = NULL; - } - - sport->tx_run = 0; - - return 0; -} -EXPORT_SYMBOL(sport_tx_stop); - -static inline int compute_wdsize(size_t wdsize) -{ - switch (wdsize) { - case 1: - return WDSIZE_8; - case 2: - return WDSIZE_16; - case 4: - default: - return WDSIZE_32; - } -} - -int sport_config_rx_dma(struct sport_device *sport, void *buf, - int fragcount, size_t fragsize) -{ - unsigned int x_count; - unsigned int y_count; - unsigned int cfg; - dma_addr_t addr; - - pr_debug("%s buf:%p, frag:%d, fragsize:0x%lx\n", __func__, \ - buf, fragcount, fragsize); - - x_count = fragsize / sport->wdsize; - y_count = 0; - - /* for fragments larger than 64k words we use 2d dma, - * denote fragecount as two numbers' mutliply and both of them - * are less than 64k.*/ - if (x_count >= 0x10000) { - int i, count = x_count; - - for (i = 16; i > 0; i--) { - x_count = 1 << i; - if ((count & (x_count - 1)) == 0) { - y_count = count >> i; - if (y_count < 0x10000) - break; - } - } - if (i == 0) - return -EINVAL; - } - pr_debug("%s(x_count:0x%x, y_count:0x%x)\n", __func__, - x_count, y_count); - - if (sport->dma_rx_desc) - dma_free_coherent(NULL, sport->rx_desc_bytes, - sport->dma_rx_desc, 0); - - /* Allocate a new descritor ring as current one. */ - sport->dma_rx_desc = dma_alloc_coherent(NULL, \ - fragcount * sizeof(struct dmasg), &addr, 0); - sport->rx_desc_bytes = fragcount * sizeof(struct dmasg); - - if (!sport->dma_rx_desc) { - pr_err("Failed to allocate memory for rx desc\n"); - return -ENOMEM; - } - - sport->rx_buf = buf; - sport->rx_fragsize = fragsize; - sport->rx_frags = fragcount; - - cfg = 0x7000 | DI_EN | compute_wdsize(sport->wdsize) | WNR | \ - (DESC_ELEMENT_COUNT << 8); /* large descriptor mode */ - - if (y_count != 0) - cfg |= DMA2D; - - setup_desc(sport->dma_rx_desc, buf, fragcount, fragsize, - cfg|DMAEN, x_count, y_count, sport->wdsize); - - return 0; -} -EXPORT_SYMBOL(sport_config_rx_dma); - -int sport_config_tx_dma(struct sport_device *sport, void *buf, \ - int fragcount, size_t fragsize) -{ - unsigned int x_count; - unsigned int y_count; - unsigned int cfg; - dma_addr_t addr; - - pr_debug("%s buf:%p, fragcount:%d, fragsize:0x%lx\n", - __func__, buf, fragcount, fragsize); - - x_count = fragsize/sport->wdsize; - y_count = 0; - - /* for fragments larger than 64k words we use 2d dma, - * denote fragecount as two numbers' mutliply and both of them - * are less than 64k.*/ - if (x_count >= 0x10000) { - int i, count = x_count; - - for (i = 16; i > 0; i--) { - x_count = 1 << i; - if ((count & (x_count - 1)) == 0) { - y_count = count >> i; - if (y_count < 0x10000) - break; - } - } - if (i == 0) - return -EINVAL; - } - pr_debug("%s x_count:0x%x, y_count:0x%x\n", __func__, - x_count, y_count); - - - if (sport->dma_tx_desc) { - dma_free_coherent(NULL, sport->tx_desc_bytes, \ - sport->dma_tx_desc, 0); - } - - sport->dma_tx_desc = dma_alloc_coherent(NULL, \ - fragcount * sizeof(struct dmasg), &addr, 0); - sport->tx_desc_bytes = fragcount * sizeof(struct dmasg); - if (!sport->dma_tx_desc) { - pr_err("Failed to allocate memory for tx desc\n"); - return -ENOMEM; - } - - sport->tx_buf = buf; - sport->tx_fragsize = fragsize; - sport->tx_frags = fragcount; - cfg = 0x7000 | DI_EN | compute_wdsize(sport->wdsize) | \ - (DESC_ELEMENT_COUNT << 8); /* large descriptor mode */ - - if (y_count != 0) - cfg |= DMA2D; - - setup_desc(sport->dma_tx_desc, buf, fragcount, fragsize, - cfg|DMAEN, x_count, y_count, sport->wdsize); - - return 0; -} -EXPORT_SYMBOL(sport_config_tx_dma); - -/* setup dummy dma descriptor ring, which don't generate interrupts, - * the x_modify is set to 0 */ -static int sport_config_rx_dummy(struct sport_device *sport) -{ - struct dmasg *desc; - unsigned config; - - pr_debug("%s entered\n", __func__); - if (L1_DATA_A_LENGTH) - desc = l1_data_sram_zalloc(2 * sizeof(*desc)); - else { - dma_addr_t addr; - desc = dma_alloc_coherent(NULL, 2 * sizeof(*desc), &addr, 0); - memset(desc, 0, 2 * sizeof(*desc)); - } - if (desc == NULL) { - pr_err("Failed to allocate memory for dummy rx desc\n"); - return -ENOMEM; - } - sport->dummy_rx_desc = desc; - desc->start_addr = (unsigned long)sport->dummy_buf; - config = DMAFLOW_LARGE | NDSIZE_9 | compute_wdsize(sport->wdsize) - | WNR | DMAEN; - desc->cfg = config; - desc->x_count = sport->dummy_count/sport->wdsize; - desc->x_modify = sport->wdsize; - desc->y_count = 0; - desc->y_modify = 0; - memcpy(desc+1, desc, sizeof(*desc)); - desc->next_desc_addr = desc + 1; - desc[1].next_desc_addr = desc; - return 0; -} - -static int sport_config_tx_dummy(struct sport_device *sport) -{ - struct dmasg *desc; - unsigned int config; - - pr_debug("%s entered\n", __func__); - - if (L1_DATA_A_LENGTH) - desc = l1_data_sram_zalloc(2 * sizeof(*desc)); - else { - dma_addr_t addr; - desc = dma_alloc_coherent(NULL, 2 * sizeof(*desc), &addr, 0); - memset(desc, 0, 2 * sizeof(*desc)); - } - if (!desc) { - pr_err("Failed to allocate memory for dummy tx desc\n"); - return -ENOMEM; - } - sport->dummy_tx_desc = desc; - desc->start_addr = (unsigned long)sport->dummy_buf + \ - sport->dummy_count; - config = DMAFLOW_LARGE | NDSIZE_9 | - compute_wdsize(sport->wdsize) | DMAEN; - desc->cfg = config; - desc->x_count = sport->dummy_count/sport->wdsize; - desc->x_modify = sport->wdsize; - desc->y_count = 0; - desc->y_modify = 0; - memcpy(desc+1, desc, sizeof(*desc)); - desc->next_desc_addr = desc + 1; - desc[1].next_desc_addr = desc; - return 0; -} - -unsigned long sport_curr_offset_rx(struct sport_device *sport) -{ - unsigned long curr = get_dma_curr_addr(sport->dma_rx_chan); - - return (unsigned char *)curr - sport->rx_buf; -} -EXPORT_SYMBOL(sport_curr_offset_rx); - -unsigned long sport_curr_offset_tx(struct sport_device *sport) -{ - unsigned long curr = get_dma_curr_addr(sport->dma_tx_chan); - - return (unsigned char *)curr - sport->tx_buf; -} -EXPORT_SYMBOL(sport_curr_offset_tx); - -void sport_incfrag(struct sport_device *sport, int *frag, int tx) -{ - ++(*frag); - if (tx == 1 && *frag == sport->tx_frags) - *frag = 0; - - if (tx == 0 && *frag == sport->rx_frags) - *frag = 0; -} -EXPORT_SYMBOL(sport_incfrag); - -void sport_decfrag(struct sport_device *sport, int *frag, int tx) -{ - --(*frag); - if (tx == 1 && *frag == 0) - *frag = sport->tx_frags; - - if (tx == 0 && *frag == 0) - *frag = sport->rx_frags; -} -EXPORT_SYMBOL(sport_decfrag); - -static int sport_check_status(struct sport_device *sport, - unsigned int *sport_stat, - unsigned int *rx_stat, - unsigned int *tx_stat) -{ - int status = 0; - - if (sport_stat) { - SSYNC(); - status = sport->regs->stat; - if (status & (TOVF|TUVF|ROVF|RUVF)) - sport->regs->stat = (status & (TOVF|TUVF|ROVF|RUVF)); - SSYNC(); - *sport_stat = status; - } - - if (rx_stat) { - SSYNC(); - status = get_dma_curr_irqstat(sport->dma_rx_chan); - if (status & (DMA_DONE|DMA_ERR)) - clear_dma_irqstat(sport->dma_rx_chan); - SSYNC(); - *rx_stat = status; - } - - if (tx_stat) { - SSYNC(); - status = get_dma_curr_irqstat(sport->dma_tx_chan); - if (status & (DMA_DONE|DMA_ERR)) - clear_dma_irqstat(sport->dma_tx_chan); - SSYNC(); - *tx_stat = status; - } - - return 0; -} - -int sport_dump_stat(struct sport_device *sport, char *buf, size_t len) -{ - int ret; - - ret = snprintf(buf, len, - "sts: 0x%04x\n" - "rx dma %d sts: 0x%04x tx dma %d sts: 0x%04x\n", - sport->regs->stat, - sport->dma_rx_chan, - get_dma_curr_irqstat(sport->dma_rx_chan), - sport->dma_tx_chan, - get_dma_curr_irqstat(sport->dma_tx_chan)); - buf += ret; - len -= ret; - - ret += snprintf(buf, len, - "curr_rx_desc:0x%p, curr_tx_desc:0x%p\n" - "dma_rx_desc:0x%p, dma_tx_desc:0x%p\n" - "dummy_rx_desc:0x%p, dummy_tx_desc:0x%p\n", - sport->curr_rx_desc, sport->curr_tx_desc, - sport->dma_rx_desc, sport->dma_tx_desc, - sport->dummy_rx_desc, sport->dummy_tx_desc); - - return ret; -} - -static irqreturn_t rx_handler(int irq, void *dev_id) -{ - unsigned int rx_stat; - struct sport_device *sport = dev_id; - - pr_debug("%s enter\n", __func__); - sport_check_status(sport, NULL, &rx_stat, NULL); - if (!(rx_stat & DMA_DONE)) - pr_err("rx dma is already stopped\n"); - - if (sport->rx_callback) { - sport->rx_callback(sport->rx_data); - return IRQ_HANDLED; - } - - return IRQ_NONE; -} - -static irqreturn_t tx_handler(int irq, void *dev_id) -{ - unsigned int tx_stat; - struct sport_device *sport = dev_id; - pr_debug("%s enter\n", __func__); - sport_check_status(sport, NULL, NULL, &tx_stat); - if (!(tx_stat & DMA_DONE)) { - pr_err("tx dma is already stopped\n"); - return IRQ_HANDLED; - } - if (sport->tx_callback) { - sport->tx_callback(sport->tx_data); - return IRQ_HANDLED; - } - - return IRQ_NONE; -} - -static irqreturn_t err_handler(int irq, void *dev_id) -{ - unsigned int status = 0; - struct sport_device *sport = dev_id; - - pr_debug("%s\n", __func__); - if (sport_check_status(sport, &status, NULL, NULL)) { - pr_err("error checking status ??"); - return IRQ_NONE; - } - - if (status & (TOVF|TUVF|ROVF|RUVF)) { - pr_info("sport status error:%s%s%s%s\n", - status & TOVF ? " TOVF" : "", - status & TUVF ? " TUVF" : "", - status & ROVF ? " ROVF" : "", - status & RUVF ? " RUVF" : ""); - if (status & TOVF || status & TUVF) { - disable_dma(sport->dma_tx_chan); - if (sport->tx_run) - sport_tx_dma_start(sport, 0); - else - sport_tx_dma_start(sport, 1); - enable_dma(sport->dma_tx_chan); - } else { - disable_dma(sport->dma_rx_chan); - if (sport->rx_run) - sport_rx_dma_start(sport, 0); - else - sport_rx_dma_start(sport, 1); - enable_dma(sport->dma_rx_chan); - } - } - status = sport->regs->stat; - if (status & (TOVF|TUVF|ROVF|RUVF)) - sport->regs->stat = (status & (TOVF|TUVF|ROVF|RUVF)); - SSYNC(); - - if (sport->err_callback) - sport->err_callback(sport->err_data); - - return IRQ_HANDLED; -} - -int sport_set_rx_callback(struct sport_device *sport, - void (*rx_callback)(void *), void *rx_data) -{ - if (WARN_ON(!rx_callback)) - return -EINVAL; - sport->rx_callback = rx_callback; - sport->rx_data = rx_data; - - return 0; -} -EXPORT_SYMBOL(sport_set_rx_callback); - -int sport_set_tx_callback(struct sport_device *sport, - void (*tx_callback)(void *), void *tx_data) -{ - if (WARN_ON(!tx_callback)) - return -EINVAL; - sport->tx_callback = tx_callback; - sport->tx_data = tx_data; - - return 0; -} -EXPORT_SYMBOL(sport_set_tx_callback); - -int sport_set_err_callback(struct sport_device *sport, - void (*err_callback)(void *), void *err_data) -{ - if (WARN_ON(!err_callback)) - return -EINVAL; - sport->err_callback = err_callback; - sport->err_data = err_data; - - return 0; -} -EXPORT_SYMBOL(sport_set_err_callback); - -static int sport_config_pdev(struct platform_device *pdev, struct sport_param *param) -{ - /* Extract settings from platform data */ - struct device *dev = &pdev->dev; - struct bfin_snd_platform_data *pdata = dev->platform_data; - struct resource *res; - - param->num = pdev->id; - - if (!pdata) { - dev_err(dev, "no platform_data\n"); - return -ENODEV; - } - param->pin_req = pdata->pin_req; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(dev, "no MEM resource\n"); - return -ENODEV; - } - param->regs = (struct sport_register *)res->start; - - /* first RX, then TX */ - res = platform_get_resource(pdev, IORESOURCE_DMA, 0); - if (!res) { - dev_err(dev, "no rx DMA resource\n"); - return -ENODEV; - } - param->dma_rx_chan = res->start; - - res = platform_get_resource(pdev, IORESOURCE_DMA, 1); - if (!res) { - dev_err(dev, "no tx DMA resource\n"); - return -ENODEV; - } - param->dma_tx_chan = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res) { - dev_err(dev, "no irq resource\n"); - return -ENODEV; - } - param->err_irq = res->start; - - return 0; -} - -struct sport_device *sport_init(struct platform_device *pdev, - unsigned int wdsize, unsigned int dummy_count, size_t priv_size) -{ - struct device *dev = &pdev->dev; - struct sport_param param; - struct sport_device *sport; - int ret; - - dev_dbg(dev, "%s enter\n", __func__); - - param.wdsize = wdsize; - param.dummy_count = dummy_count; - if (WARN_ON(param.wdsize == 0 || param.dummy_count == 0)) - return NULL; - - ret = sport_config_pdev(pdev, ¶m); - if (ret) - return NULL; - - if (peripheral_request_list(param.pin_req, "soc-audio")) { - dev_err(dev, "requesting Peripherals failed\n"); - return NULL; - } - - sport = kzalloc(sizeof(*sport), GFP_KERNEL); - if (!sport) { - dev_err(dev, "failed to allocate for sport device\n"); - goto __init_err0; - } - - sport->num = param.num; - sport->dma_rx_chan = param.dma_rx_chan; - sport->dma_tx_chan = param.dma_tx_chan; - sport->err_irq = param.err_irq; - sport->regs = param.regs; - sport->pin_req = param.pin_req; - - if (request_dma(sport->dma_rx_chan, "SPORT RX Data") == -EBUSY) { - dev_err(dev, "failed to request RX dma %d\n", sport->dma_rx_chan); - goto __init_err1; - } - if (set_dma_callback(sport->dma_rx_chan, rx_handler, sport) != 0) { - dev_err(dev, "failed to request RX irq %d\n", sport->dma_rx_chan); - goto __init_err2; - } - - if (request_dma(sport->dma_tx_chan, "SPORT TX Data") == -EBUSY) { - dev_err(dev, "failed to request TX dma %d\n", sport->dma_tx_chan); - goto __init_err2; - } - - if (set_dma_callback(sport->dma_tx_chan, tx_handler, sport) != 0) { - dev_err(dev, "failed to request TX irq %d\n", sport->dma_tx_chan); - goto __init_err3; - } - - if (request_irq(sport->err_irq, err_handler, IRQF_SHARED, "SPORT err", - sport) < 0) { - dev_err(dev, "failed to request err irq %d\n", sport->err_irq); - goto __init_err3; - } - - dev_info(dev, "dma rx:%d tx:%d, err irq:%d, regs:%p\n", - sport->dma_rx_chan, sport->dma_tx_chan, - sport->err_irq, sport->regs); - - sport->wdsize = param.wdsize; - sport->dummy_count = param.dummy_count; - - sport->private_data = kzalloc(priv_size, GFP_KERNEL); - if (!sport->private_data) { - dev_err(dev, "could not alloc priv data %zu bytes\n", priv_size); - goto __init_err4; - } - - if (L1_DATA_A_LENGTH) - sport->dummy_buf = l1_data_sram_zalloc(param.dummy_count * 2); - else - sport->dummy_buf = kzalloc(param.dummy_count * 2, GFP_KERNEL); - if (sport->dummy_buf == NULL) { - dev_err(dev, "failed to allocate dummy buffer\n"); - goto __error1; - } - - ret = sport_config_rx_dummy(sport); - if (ret) { - dev_err(dev, "failed to config rx dummy ring\n"); - goto __error2; - } - ret = sport_config_tx_dummy(sport); - if (ret) { - dev_err(dev, "failed to config tx dummy ring\n"); - goto __error3; - } - - platform_set_drvdata(pdev, sport); - - return sport; -__error3: - if (L1_DATA_A_LENGTH) - l1_data_sram_free(sport->dummy_rx_desc); - else - dma_free_coherent(NULL, 2*sizeof(struct dmasg), - sport->dummy_rx_desc, 0); -__error2: - if (L1_DATA_A_LENGTH) - l1_data_sram_free(sport->dummy_buf); - else - kfree(sport->dummy_buf); -__error1: - kfree(sport->private_data); -__init_err4: - free_irq(sport->err_irq, sport); -__init_err3: - free_dma(sport->dma_tx_chan); -__init_err2: - free_dma(sport->dma_rx_chan); -__init_err1: - kfree(sport); -__init_err0: - peripheral_free_list(param.pin_req); - return NULL; -} -EXPORT_SYMBOL(sport_init); - -void sport_done(struct sport_device *sport) -{ - if (sport == NULL) - return; - - sport_stop(sport); - if (sport->dma_rx_desc) - dma_free_coherent(NULL, sport->rx_desc_bytes, - sport->dma_rx_desc, 0); - if (sport->dma_tx_desc) - dma_free_coherent(NULL, sport->tx_desc_bytes, - sport->dma_tx_desc, 0); - -#if L1_DATA_A_LENGTH != 0 - l1_data_sram_free(sport->dummy_rx_desc); - l1_data_sram_free(sport->dummy_tx_desc); - l1_data_sram_free(sport->dummy_buf); -#else - dma_free_coherent(NULL, 2*sizeof(struct dmasg), - sport->dummy_rx_desc, 0); - dma_free_coherent(NULL, 2*sizeof(struct dmasg), - sport->dummy_tx_desc, 0); - kfree(sport->dummy_buf); -#endif - free_dma(sport->dma_rx_chan); - free_dma(sport->dma_tx_chan); - free_irq(sport->err_irq, sport); - - kfree(sport->private_data); - peripheral_free_list(sport->pin_req); - kfree(sport); -} -EXPORT_SYMBOL(sport_done); - -/* -* It is only used to send several bytes when dma is not enabled - * sport controller is configured but not enabled. - * Multichannel cannot works with pio mode */ -/* Used by ac97 to write and read codec register */ -int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \ - u8 *in_data, int len) -{ - unsigned short dma_config; - unsigned short status; - unsigned long flags; - unsigned long wait = 0; - - pr_debug("%s enter, out_data:%p, in_data:%p len:%d\n", \ - __func__, out_data, in_data, len); - pr_debug("tcr1:0x%04x, tcr2:0x%04x, tclkdiv:0x%04x, tfsdiv:0x%04x\n" - "mcmc1:0x%04x, mcmc2:0x%04x\n", - sport->regs->tcr1, sport->regs->tcr2, - sport->regs->tclkdiv, sport->regs->tfsdiv, - sport->regs->mcmc1, sport->regs->mcmc2); - flush_dcache_range((unsigned)out_data, (unsigned)(out_data + len)); - - /* Enable tx dma */ - dma_config = (RESTART | WDSIZE_16 | DI_EN); - set_dma_start_addr(sport->dma_tx_chan, (unsigned long)out_data); - set_dma_x_count(sport->dma_tx_chan, len/2); - set_dma_x_modify(sport->dma_tx_chan, 2); - set_dma_config(sport->dma_tx_chan, dma_config); - enable_dma(sport->dma_tx_chan); - - if (in_data != NULL) { - invalidate_dcache_range((unsigned)in_data, \ - (unsigned)(in_data + len)); - /* Enable rx dma */ - dma_config = (RESTART | WDSIZE_16 | WNR | DI_EN); - set_dma_start_addr(sport->dma_rx_chan, (unsigned long)in_data); - set_dma_x_count(sport->dma_rx_chan, len/2); - set_dma_x_modify(sport->dma_rx_chan, 2); - set_dma_config(sport->dma_rx_chan, dma_config); - enable_dma(sport->dma_rx_chan); - } - - local_irq_save(flags); - sport->regs->tcr1 |= TSPEN; - sport->regs->rcr1 |= RSPEN; - SSYNC(); - - status = get_dma_curr_irqstat(sport->dma_tx_chan); - while (status & DMA_RUN) { - udelay(1); - status = get_dma_curr_irqstat(sport->dma_tx_chan); - pr_debug("DMA status:0x%04x\n", status); - if (wait++ > 100) - goto __over; - } - status = sport->regs->stat; - wait = 0; - - while (!(status & TXHRE)) { - pr_debug("sport status:0x%04x\n", status); - udelay(1); - status = *(unsigned short *)&sport->regs->stat; - if (wait++ > 1000) - goto __over; - } - /* Wait for the last byte sent out */ - udelay(20); - pr_debug("sport status:0x%04x\n", status); - -__over: - sport->regs->tcr1 &= ~TSPEN; - sport->regs->rcr1 &= ~RSPEN; - SSYNC(); - disable_dma(sport->dma_tx_chan); - /* Clear the status */ - clear_dma_irqstat(sport->dma_tx_chan); - if (in_data != NULL) { - disable_dma(sport->dma_rx_chan); - clear_dma_irqstat(sport->dma_rx_chan); - } - SSYNC(); - local_irq_restore(flags); - - return 0; -} -EXPORT_SYMBOL(sport_send_and_recv); - -MODULE_AUTHOR("Roy Huang"); -MODULE_DESCRIPTION("SPORT driver for ADI Blackfin"); -MODULE_LICENSE("GPL"); |