From: Cliff Cai cliff.cai@analog.com

Signed-off-by: Cliff Cai cliff.cai@analog.com Signed-off-by: Bryan Wu cooloney@kernel.org --- sound/soc/blackfin/Kconfig | 85 +++++++++++++++++++++++++++++++++++++++++++ sound/soc/blackfin/Makefile | 20 ++++++++++ 2 files changed, 105 insertions(+), 0 deletions(-) create mode 100644 sound/soc/blackfin/Kconfig create mode 100644 sound/soc/blackfin/Makefile

diff --git a/sound/soc/blackfin/Kconfig b/sound/soc/blackfin/Kconfig new file mode 100644 index 0000000..f98331d --- /dev/null +++ b/sound/soc/blackfin/Kconfig @@ -0,0 +1,85 @@ +config SND_BF5XX_I2S + tristate "SoC I2S Audio for the ADI BF5xx chip" + depends on BLACKFIN && SND_SOC + help + Say Y or M if you want to add support for codecs attached to + the Blackfin SPORT (synchronous serial ports) interface in I2S + mode (supports single stereo In/Out). + You will also need to select the audio interfaces to support below. + +config SND_BF5XX_SOC_SSM2602 + tristate "SoC SSM2602 Audio support for BF52x ezkit" + depends on SND_BF5XX_I2S + select SND_BF5XX_SOC_I2S + select SND_SOC_SSM2602 + select I2C + select I2C_BLACKFIN_TWI + help + Say Y if you want to add support for SoC audio on BF527-EZKIT. + +config SND_BF5XX_AC97 + tristate "SoC AC97 Audio for the ADI BF5xx chip" + depends on BLACKFIN && SND_SOC + help + Say Y or M if you want to add support for codecs attached to + the Blackfin SPORT (synchronous serial ports) interface in slot 16 + mode (pseudo AC97 interface). + You will also need to select the audio interfaces to support below. + + Note: + AC97 codecs which do not implment the slot-16 mode will not function + properly with this driver. This driver is known to work with the + Analog Devices line of AC97 codecs. + +config SND_MMAP_SUPPORT + bool "Enable MMAP Support" + depends on SND_BF5XX_AC97 + default y + help + Say y if you want AC97 driver to support mmap mode. + We introduce an intermediate buffer to simulate mmap. + +config SND_BF5XX_SOC_SPORT + tristate + +config SND_BF5XX_SOC_I2S + tristate + select SND_BF5XX_SOC_SPORT + +config SND_BF5XX_SOC_AC97 + tristate + select AC97_BUS + select SND_SOC_AC97_BUS + select SND_BF5XX_SOC_SPORT + +config SND_BF5XX_SOC_AD1980 + tristate "SoC AD1980/1 Audio support for BF5xx" + depends on SND_BF5XX_AC97 + select SND_BF5XX_SOC_AC97 + select SND_SOC_AD1980 + help + Say Y if you want to add support for SoC audio on BF5xx STAMP/EZKIT. + +config SND_BF5XX_SPORT_NUM + int "Set a SPORT for Sound chip" + depends on (SND_BF5XX_I2S || SND_BF5XX_AC97) + range 0 3 if BF54x + range 0 1 if (BF53x || BF561) + default 0 + help + Set the correct SPORT for sound chip. + +config SND_BF5XX_HAVE_COLD_RESET + bool "BOARD has COLD Reset GPIO" + depends on SND_BF5XX_AC97 + default y if BFIN548_EZKIT + default n if !BFIN548_EZKIT + +config SND_BF5XX_RESET_GPIO_NUM + int "Set a GPIO for cold reset" + depends on SND_BF5XX_HAVE_COLD_RESET + range 0 159 + default 19 if BFIN548_EZKIT + default 5 if BFIN537_STAMP + help + Set the correct GPIO for RESET the sound chip. diff --git a/sound/soc/blackfin/Makefile b/sound/soc/blackfin/Makefile new file mode 100644 index 0000000..9ea8bd9 --- /dev/null +++ b/sound/soc/blackfin/Makefile @@ -0,0 +1,20 @@ +# Blackfin Platform Support +snd-bf5xx-ac97-objs := bf5xx-ac97-pcm.o +snd-bf5xx-i2s-objs := bf5xx-i2s-pcm.o +snd-soc-bf5xx-sport-objs := bf5xx-sport.o +snd-soc-bf5xx-ac97-objs := bf5xx-ac97.o +snd-soc-bf5xx-i2s-objs := bf5xx-i2s.o + +obj-$(CONFIG_SND_BF5XX_AC97) += snd-bf5xx-ac97.o +obj-$(CONFIG_SND_BF5XX_I2S) += snd-bf5xx-i2s.o +obj-$(CONFIG_SND_BF5XX_SOC_SPORT) += snd-soc-bf5xx-sport.o +obj-$(CONFIG_SND_BF5XX_SOC_AC97) += snd-soc-bf5xx-ac97.o +obj-$(CONFIG_SND_BF5XX_SOC_I2S) += snd-soc-bf5xx-i2s.o + +# Blackfin Machine Support +snd-ad1980-objs := bf5xx-ad1980.o +snd-ssm2602-objs := bf5xx-ssm2602.o + + +obj-$(CONFIG_SND_BF5XX_SOC_AD1980) += snd-ad1980.o +obj-$(CONFIG_SND_BF5XX_SOC_SSM2602) += snd-ssm2602.o

From: Cliff Cai cliff.cai@analog.com

SPORT is a serial port which can support serveral serial communication protocols. It can be used as I2C/PCM/AC97. For further information, please look up the HRM.

Signed-off-by: Cliff Cai cliff.cai@analog.com Signed-off-by: Bryan Wu cooloney@kernel.org --- sound/soc/blackfin/bf5xx-sport.c | 1028 ++++++++++++++++++++++++++++++++++++++ sound/soc/blackfin/bf5xx-sport.h | 192 +++++++ 2 files changed, 1220 insertions(+), 0 deletions(-) create mode 100644 sound/soc/blackfin/bf5xx-sport.c create mode 100644 sound/soc/blackfin/bf5xx-sport.h

diff --git a/sound/soc/blackfin/bf5xx-sport.c b/sound/soc/blackfin/bf5xx-sport.c new file mode 100644 index 0000000..087613c --- /dev/null +++ b/sound/soc/blackfin/bf5xx-sport.c @@ -0,0 +1,1028 @@ +/* + * File: bf5xx_ac97_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 <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) + +struct sport_device *sport_handle; +EXPORT_SYMBOL(sport_handle); +/* 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 mask, int packed) +{ + pr_debug("%s tdm_count=%d mask:0x%08x packed=%d\n", __func__, + tdm_count, 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 = mask; + sport->regs->mrcs0 = 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 = (unsigned long)&(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 = (unsigned long)desc; + + pr_debug("setup desc: desc0=%p, next0=%lx, desc1=%p," + "next1=%lx\nx_count=%x,y_count=%x,addr=0x%lx,cfs=0x%x\n", + &(desc[0]), 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; + + BUG_ON(sport->dummy_rx_desc == NULL); + BUG_ON(sport->curr_rx_desc == sport->dummy_rx_desc); + + /* Maybe the dummy buffer descriptor ring is damaged */ + sport->dummy_rx_desc->next_desc_addr = \ + (unsigned long)(sport->dummy_rx_desc+1); + + local_irq_save(flags); + desc = (struct dmasg *)get_dma_next_desc_ptr(sport->dma_rx_chan); + /* Copy the descriptor which will be damaged to backup */ + temp_desc = *desc; + desc->x_count = 0xa; + desc->y_count = 0; + desc->next_desc_addr = (unsigned long)(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)) != \ + (unsigned long)sport->dummy_rx_desc) {} + 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 = \ + (unsigned long) 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, \ + (unsigned long)(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 = \ + (unsigned long) 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, \ + (unsigned long)(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 */ + BUG_ON(sport->dma_rx_desc == NULL); + BUG_ON(sport->curr_rx_desc != sport->dummy_rx_desc); + local_irq_save(flags); + while ((get_dma_curr_desc_ptr(sport->dma_rx_chan) - \ + sizeof(struct dmasg)) != \ + (unsigned long)sport->dummy_rx_desc) {} + sport->dummy_rx_desc->next_desc_addr = \ + (unsigned long)(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; + + BUG_ON(sport->dummy_tx_desc == NULL); + BUG_ON(sport->curr_tx_desc == sport->dummy_tx_desc); + + sport->dummy_tx_desc->next_desc_addr = \ + (unsigned long)(sport->dummy_tx_desc+1); + + /* Shorten the time on last normal descriptor */ + local_irq_save(flags); + desc = (struct dmasg *)get_dma_next_desc_ptr(sport->dma_tx_chan); + /* Store the descriptor which will be damaged */ + temp_desc = *desc; + desc->x_count = 0xa; + desc->y_count = 0; + desc->next_desc_addr = (unsigned long)(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)) != \ + (unsigned long)sport->dummy_tx_desc) {} + 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 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) { + BUG_ON(sport->dma_tx_desc == NULL); + BUG_ON(sport->curr_tx_desc != sport->dummy_tx_desc); + /* Hook the normal buffer descriptor */ + local_irq_save(flags); + while ((get_dma_curr_desc_ptr(sport->dma_tx_chan) - \ + sizeof(struct dmasg)) != \ + (unsigned long)sport->dummy_tx_desc) {} + sport->dummy_tx_desc->next_desc_addr = \ + (unsigned long)(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 != 0 + desc = (struct dmasg *) l1_data_sram_alloc(2 * sizeof(*desc)); +#else + { + dma_addr_t addr; + desc = dma_alloc_coherent(NULL, 2 * sizeof(*desc), &addr, 0); + } +#endif + if (desc == NULL) { + pr_err("Failed to allocate memory for dummy rx desc\n"); + return -ENOMEM; + } + memset(desc, 0, 2 * sizeof(*desc)); + 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 = (unsigned long)(desc+1); + desc[1].next_desc_addr = (unsigned long)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 != 0 + desc = (struct dmasg *) l1_data_sram_alloc(2 * sizeof(*desc)); +#else + { + dma_addr_t addr; + desc = dma_alloc_coherent(NULL, 2 * sizeof(*desc), &addr, 0); + } +#endif + if (!desc) { + pr_err("Failed to allocate memory for dummy tx desc\n"); + return -ENOMEM; + } + memset(desc, 0, 2 * sizeof(*desc)); + 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 = (unsigned long)(desc+1); + desc[1].next_desc_addr = (unsigned long)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) +{ + BUG_ON(rx_callback == NULL); + 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) +{ + BUG_ON(tx_callback == NULL); + 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) +{ + BUG_ON(err_callback == NULL); + sport->err_callback = err_callback; + sport->err_data = err_data; + + return 0; +} +EXPORT_SYMBOL(sport_set_err_callback); + +struct sport_device *sport_init(struct sport_param *param, unsigned wdsize, + unsigned dummy_count, void *private_data) +{ + int ret; + struct sport_device *sport; + pr_debug("%s enter\n", __func__); + BUG_ON(param == NULL); + BUG_ON(wdsize == 0 || dummy_count == 0); + sport = kmalloc(sizeof(struct sport_device), GFP_KERNEL); + if (!sport) { + pr_err("Failed to allocate for sport device\n"); + return NULL; + } + + memset(sport, 0, sizeof(struct sport_device)); + 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->private_data = private_data; + + if (request_dma(sport->dma_rx_chan, "SPORT RX Data") == -EBUSY) { + pr_err("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) { + pr_err("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) { + pr_err("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) { + pr_err("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) { + pr_err("Failed to request err irq:%d\n", \ + sport->err_irq); + goto __init_err3; + } + + pr_err("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 = wdsize; + sport->dummy_count = dummy_count; + +#if L1_DATA_A_LENGTH != 0 + sport->dummy_buf = l1_data_sram_alloc(dummy_count * 2); +#else + sport->dummy_buf = kmalloc(dummy_count * 2, GFP_KERNEL); +#endif + if (sport->dummy_buf == NULL) { + pr_err("Failed to allocate dummy buffer\n"); + goto __error; + } + + memset(sport->dummy_buf, 0, dummy_count * 2); + ret = sport_config_rx_dummy(sport); + if (ret) { + pr_err("Failed to config rx dummy ring\n"); + goto __error; + } + ret = sport_config_tx_dummy(sport); + if (ret) { + pr_err("Failed to config tx dummy ring\n"); + goto __error; + } + + return sport; +__error: + 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); + 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); + sport = NULL; +} +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"); + diff --git a/sound/soc/blackfin/bf5xx-sport.h b/sound/soc/blackfin/bf5xx-sport.h new file mode 100644 index 0000000..4c16345 --- /dev/null +++ b/sound/soc/blackfin/bf5xx-sport.h @@ -0,0 +1,192 @@ +/* + * File: bf5xx_ac97_sport.h + * Based on: + * Author: Roy Huang roy.huang@analog.com + * + * Created: + * Description: + * + * 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 + */ + + +#ifndef __BF5XX_SPORT_H__ +#define __BF5XX_SPORT_H__ + +#include <linux/types.h> +#include <linux/wait.h> +#include <linux/workqueue.h> +#include <asm/dma.h> + +struct sport_register { + u16 tcr1; u16 reserved0; + u16 tcr2; u16 reserved1; + u16 tclkdiv; u16 reserved2; + u16 tfsdiv; u16 reserved3; + u32 tx; + u32 reserved_l0; + u32 rx; + u32 reserved_l1; + u16 rcr1; u16 reserved4; + u16 rcr2; u16 reserved5; + u16 rclkdiv; u16 reserved6; + u16 rfsdiv; u16 reserved7; + u16 stat; u16 reserved8; + u16 chnl; u16 reserved9; + u16 mcmc1; u16 reserved10; + u16 mcmc2; u16 reserved11; + u32 mtcs0; + u32 mtcs1; + u32 mtcs2; + u32 mtcs3; + u32 mrcs0; + u32 mrcs1; + u32 mrcs2; + u32 mrcs3; +}; + +#define DESC_ELEMENT_COUNT 9 + +struct sport_device { + int dma_rx_chan; + int dma_tx_chan; + int err_irq; + struct sport_register *regs; + + unsigned char *rx_buf; + unsigned char *tx_buf; + unsigned int rx_fragsize; + unsigned int tx_fragsize; + unsigned int rx_frags; + unsigned int tx_frags; + unsigned int wdsize; + + /* for dummy dma transfer */ + void *dummy_buf; + unsigned int dummy_count; + + /* DMA descriptor ring head of current audio stream*/ + struct dmasg *dma_rx_desc; + struct dmasg *dma_tx_desc; + unsigned int rx_desc_bytes; + unsigned int tx_desc_bytes; + + unsigned int rx_run:1; /* rx is running */ + unsigned int tx_run:1; /* tx is running */ + + struct dmasg *dummy_rx_desc; + struct dmasg *dummy_tx_desc; + + struct dmasg *curr_rx_desc; + struct dmasg *curr_tx_desc; + + int rx_curr_frag; + int tx_curr_frag; + + unsigned int rcr1; + unsigned int rcr2; + int rx_tdm_count; + + unsigned int tcr1; + unsigned int tcr2; + int tx_tdm_count; + + void (*rx_callback)(void *data); + void *rx_data; + void (*tx_callback)(void *data); + void *tx_data; + void (*err_callback)(void *data); + void *err_data; + unsigned char *tx_dma_buf; + unsigned char *rx_dma_buf; +#ifdef CONFIG_SND_MMAP_SUPPORT + dma_addr_t tx_dma_phy; + dma_addr_t rx_dma_phy; + int tx_pos;/*pcm sample count*/ + int rx_pos; + unsigned int tx_buffer_size; + unsigned int rx_buffer_size; +#endif + void *private_data; +}; + +extern struct sport_device *sport_handle; + +struct sport_param { + int dma_rx_chan; + int dma_tx_chan; + int err_irq; + struct sport_register *regs; +}; + +struct sport_device *sport_init(struct sport_param *param, unsigned wdsize, + unsigned dummy_count, void *private_data); + +void sport_done(struct sport_device *sport); + +/* first use these ...*/ + +/* note: multichannel is in units of 8 channels, tdm_count is number of channels + * NOT / 8 ! all channels are enabled by default */ +int sport_set_multichannel(struct sport_device *sport, int tdm_count, + u32 mask, int packed); + +int sport_config_rx(struct sport_device *sport, + unsigned int rcr1, unsigned int rcr2, + unsigned int clkdiv, unsigned int fsdiv); + +int sport_config_tx(struct sport_device *sport, + unsigned int tcr1, unsigned int tcr2, + unsigned int clkdiv, unsigned int fsdiv); + +/* ... then these: */ + +/* buffer size (in bytes) == fragcount * fragsize_bytes */ + +/* this is not a very general api, it sets the dma to 2d autobuffer mode */ + +int sport_config_rx_dma(struct sport_device *sport, void *buf, + int fragcount, size_t fragsize_bytes); + +int sport_config_tx_dma(struct sport_device *sport, void *buf, + int fragcount, size_t fragsize_bytes); + +int sport_tx_start(struct sport_device *sport); +int sport_tx_stop(struct sport_device *sport); +int sport_rx_start(struct sport_device *sport); +int sport_rx_stop(struct sport_device *sport); + +/* for use in interrupt handler */ +unsigned long sport_curr_offset_rx(struct sport_device *sport); +unsigned long sport_curr_offset_tx(struct sport_device *sport); + +void sport_incfrag(struct sport_device *sport, int *frag, int tx); +void sport_decfrag(struct sport_device *sport, int *frag, int tx); + +int sport_set_rx_callback(struct sport_device *sport, + void (*rx_callback)(void *), void *rx_data); +int sport_set_tx_callback(struct sport_device *sport, + void (*tx_callback)(void *), void *tx_data); +int sport_set_err_callback(struct sport_device *sport, + void (*err_callback)(void *), void *err_data); + +int sport_send_and_recv(struct sport_device *sport, u8 *out_data, \ + u8 *in_data, int len); +#endif /* BF53X_SPORT_H */

From: Cliff Cai cliff.cai@analog.com

Signed-off-by: Cliff Cai cliff.cai@analog.com Signed-off-by: Bryan Wu cooloney@kernel.org --- sound/soc/blackfin/bf5xx-i2s-pcm.c | 288 ++++++++++++++++++++++++++++++++++++ sound/soc/blackfin/bf5xx-i2s-pcm.h | 29 ++++ 2 files changed, 317 insertions(+), 0 deletions(-) create mode 100644 sound/soc/blackfin/bf5xx-i2s-pcm.c create mode 100644 sound/soc/blackfin/bf5xx-i2s-pcm.h

diff --git a/sound/soc/blackfin/bf5xx-i2s-pcm.c b/sound/soc/blackfin/bf5xx-i2s-pcm.c new file mode 100644 index 0000000..61fccf9 --- /dev/null +++ b/sound/soc/blackfin/bf5xx-i2s-pcm.c @@ -0,0 +1,288 @@ +/* + * File: sound/soc/blackfin/bf5xx-i2s-pcm.c + * Author: Cliff Cai Cliff.Cai@analog.com + * + * Created: Tue June 06 2008 + * Description: DMA driver for i2s codec + * + * Modified: + * Copyright 2008 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/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/dma-mapping.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include <asm/dma.h> + +#include "bf5xx-i2s-pcm.h" +#include "bf5xx-i2s.h" +#include "bf5xx-sport.h" + +static void bf5xx_dma_irq(void *data) +{ + struct snd_pcm_substream *pcm = data; + snd_pcm_period_elapsed(pcm); +} + +static const struct snd_pcm_hardware bf5xx_pcm_hardware = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_BLOCK_TRANSFER, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE, + .period_bytes_min = 32, + .period_bytes_max = 0x10000, + .periods_min = 1, + .periods_max = PAGE_SIZE/32, + .buffer_bytes_max = 0x20000, /* 128 kbytes */ + .fifo_size = 16, +}; + +static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + size_t size = bf5xx_pcm_hardware.buffer_bytes_max; + snd_pcm_lib_malloc_pages(substream, size); + + return 0; +} + +static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream) +{ + snd_pcm_lib_free_pages(substream); + + return 0; +} + +static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct sport_device *sport = runtime->private_data; + int period_bytes = frames_to_bytes(runtime, runtime->period_size); + + pr_debug("%s enter\n", __func__); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + sport_set_tx_callback(sport, bf5xx_dma_irq, substream); + sport_config_tx_dma(sport, runtime->dma_area, + runtime->periods, period_bytes); + } else { + sport_set_rx_callback(sport, bf5xx_dma_irq, substream); + sport_config_rx_dma(sport, runtime->dma_area, + runtime->periods, period_bytes); + } + + return 0; +} + +static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct sport_device *sport = runtime->private_data; + int ret = 0; + + pr_debug("%s enter\n", __func__); + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + sport_tx_start(sport); + else + sport_rx_start(sport); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + sport_tx_stop(sport); + else + sport_rx_stop(sport); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct sport_device *sport = runtime->private_data; + unsigned int diff; + snd_pcm_uframes_t frames; + pr_debug("%s enter\n", __func__); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + diff = sport_curr_offset_tx(sport); + frames = bytes_to_frames(substream->runtime, diff); + } else { + diff = sport_curr_offset_rx(sport); + frames = bytes_to_frames(substream->runtime, diff); + } + return frames; +} + +static int bf5xx_pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + int ret; + + pr_debug("%s enter\n", __func__); + snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware); + + ret = snd_pcm_hw_constraint_integer(runtime, \ + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) + goto out; + + if (sport_handle != NULL) + runtime->private_data = sport_handle; + else { + pr_err("sport_handle is NULL\n"); + return -1; + } + return 0; + + out: + return ret; +} + +static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + size_t size = vma->vm_end - vma->vm_start; + vma->vm_start = (unsigned long)runtime->dma_area; + vma->vm_end = vma->vm_start + size; + vma->vm_flags |= VM_SHARED; + + return 0 ; +} + +struct snd_pcm_ops bf5xx_pcm_i2s_ops = { + .open = bf5xx_pcm_open, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = bf5xx_pcm_hw_params, + .hw_free = bf5xx_pcm_hw_free, + .prepare = bf5xx_pcm_prepare, + .trigger = bf5xx_pcm_trigger, + .pointer = bf5xx_pcm_pointer, + .mmap = bf5xx_pcm_mmap, +}; + +static int bf5xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) +{ + struct snd_pcm_substream *substream = pcm->streams[stream].substream; + struct snd_dma_buffer *buf = &substream->dma_buffer; + size_t size = bf5xx_pcm_hardware.buffer_bytes_max; + + buf->dev.type = SNDRV_DMA_TYPE_DEV; + buf->dev.dev = pcm->card->dev; + buf->private_data = NULL; + buf->area = dma_alloc_coherent(pcm->card->dev, size, + &buf->addr, GFP_KERNEL); + if (!buf->area) { + pr_err("Failed to allocate dma memory \ + Please increase uncached DMA memory region\n"); + return -ENOMEM; + } + buf->bytes = size; + + pr_debug("%s, area:%p, size:0x%08lx\n", __func__, + buf->area, buf->bytes); + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + sport_handle->tx_buf = buf->area; + else + sport_handle->rx_buf = buf->area; + + return 0; +} + +static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm) +{ + struct snd_pcm_substream *substream; + struct snd_dma_buffer *buf; + int stream; + + for (stream = 0; stream < 2; stream++) { + substream = pcm->streams[stream].substream; + if (!substream) + continue; + + buf = &substream->dma_buffer; + if (!buf->area) + continue; + dma_free_coherent(NULL, buf->bytes, buf->area, 0); + buf->area = NULL; + } + if (sport_handle) + sport_done(sport_handle); +} + +static u64 bf5xx_pcm_dmamask = DMA_32BIT_MASK; + +int bf5xx_pcm_i2s_new(struct snd_card *card, struct snd_soc_dai *dai, + struct snd_pcm *pcm) +{ + int ret = 0; + + pr_debug("%s enter\n", __func__); + if (!card->dev->dma_mask) + card->dev->dma_mask = &bf5xx_pcm_dmamask; + if (!card->dev->coherent_dma_mask) + card->dev->coherent_dma_mask = DMA_32BIT_MASK; + + if (dai->playback.channels_min) { + ret = bf5xx_pcm_preallocate_dma_buffer(pcm, + SNDRV_PCM_STREAM_PLAYBACK); + if (ret) + goto out; + } + + if (dai->capture.channels_min) { + ret = bf5xx_pcm_preallocate_dma_buffer(pcm, + SNDRV_PCM_STREAM_CAPTURE); + if (ret) + goto out; + } + out: + return ret; +} + +struct snd_soc_platform bf5xx_i2s_soc_platform = { + .name = "bf5xx-audio", + .pcm_ops = &bf5xx_pcm_i2s_ops, + .pcm_new = bf5xx_pcm_i2s_new, + .pcm_free = bf5xx_pcm_free_dma_buffers, +}; +EXPORT_SYMBOL_GPL(bf5xx_i2s_soc_platform); + +MODULE_AUTHOR("Cliff Cai"); +MODULE_DESCRIPTION("ADI Blackfin I2S PCM DMA module"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/blackfin/bf5xx-i2s-pcm.h b/sound/soc/blackfin/bf5xx-i2s-pcm.h new file mode 100644 index 0000000..4d4609a --- /dev/null +++ b/sound/soc/blackfin/bf5xx-i2s-pcm.h @@ -0,0 +1,29 @@ +/* + * linux/sound/arm/bf5xx-i2s-pcm.h -- ALSA PCM interface for the Blackfin + * + * Copyright 2007 Analog Device Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _BF5XX_I2S_PCM_H +#define _BF5XX_I2S_PCM_H + +struct bf5xx_pcm_dma_params { + char *name; /* stream identifier */ +}; + +struct bf5xx_gpio { + u32 sys; + u32 rx; + u32 tx; + u32 clk; + u32 frm; +}; + +/* platform data */ +extern struct snd_soc_platform bf5xx_i2s_soc_platform; + +#endif

From: Cliff Cai cliff.cai@analog.com

Signed-off-by: Cliff Cai cliff.cai@analog.com Signed-off-by: Bryan Wu cooloney@kernel.org --- sound/soc/blackfin/bf5xx-i2s.c | 273 ++++++++++++++++++++++++++++++++++++++++ sound/soc/blackfin/bf5xx-i2s.h | 14 ++ 2 files changed, 287 insertions(+), 0 deletions(-) create mode 100644 sound/soc/blackfin/bf5xx-i2s.c create mode 100644 sound/soc/blackfin/bf5xx-i2s.h

diff --git a/sound/soc/blackfin/bf5xx-i2s.c b/sound/soc/blackfin/bf5xx-i2s.c new file mode 100644 index 0000000..2a87fff --- /dev/null +++ b/sound/soc/blackfin/bf5xx-i2s.c @@ -0,0 +1,273 @@ +/* + * File: sound/soc/blackfin/bf5xx-i2s.c + * Author: Cliff Cai Cliff.Cai@analog.com + * + * Created: Tue June 06 2008 + * Description: Blackfin I2S CPU DAI driver + * + * Modified: + * Copyright 2008 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/init.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/initval.h> +#include <sound/soc.h> + +#include <asm/irq.h> +#include <asm/portmux.h> +#include <linux/mutex.h> +#include <linux/gpio.h> + +#include "bf5xx-sport.h" +#include "bf5xx-i2s.h" + +struct bf5xx_i2s_port { + u16 tcr1; + u16 rcr1; + u16 tcr2; + u16 rcr2; + unsigned int master; + +}; +static struct bf5xx_i2s_port bf5xx_i2s; + + +static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM; + +static struct sport_param sport_params[2] = { + { + .dma_rx_chan = CH_SPORT0_RX, + .dma_tx_chan = CH_SPORT0_TX, + .err_irq = IRQ_SPORT0_ERROR, + .regs = (struct sport_register *)SPORT0_TCR1, + }, + { + .dma_rx_chan = CH_SPORT1_RX, + .dma_tx_chan = CH_SPORT1_TX, + .err_irq = IRQ_SPORT1_ERROR, + .regs = (struct sport_register *)SPORT1_TCR1, + } +}; + +static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, + unsigned int fmt) +{ + int ret = 0; + + /* interface format:support I2S,slave mode */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + break; + case SND_SOC_DAIFMT_LEFT_J: + ret = -EINVAL; + break; + } + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBS_CFS: + ret = -EINVAL; + break; + case SND_SOC_DAIFMT_CBM_CFS: + ret = -EINVAL; + break; + case SND_SOC_DAIFMT_CBM_CFM: + break; + case SND_SOC_DAIFMT_CBS_CFM: + ret = -EINVAL; + break; + default: + break; + } + + return ret; +} + +static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + int ret = 0; + + bf5xx_i2s.tcr2 &= ~0x1f; + bf5xx_i2s.rcr2 &= ~0x1f; + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + bf5xx_i2s.tcr2 |= 15; + bf5xx_i2s.rcr2 |= 15; + break; + case SNDRV_PCM_FORMAT_S24_LE: + bf5xx_i2s.tcr2 |= 23; + bf5xx_i2s.rcr2 |= 23; + break; + case SNDRV_PCM_FORMAT_S32_LE: + bf5xx_i2s.tcr2 |= 31; + bf5xx_i2s.rcr2 |= 31; + break; + } + + if (!bf5xx_i2s.master) { + /* + * TX and RX are not independent,they are enabled at the same time, + * even if only one side is running.So,we need to configure both of + * them in advance. + * + * CPU DAI format:I2S, slave mode. + */ + ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|bf5xx_i2s.rcr2, 0, 0); + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|bf5xx_i2s.tcr2, 0, 0); + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + bf5xx_i2s.master = 1; + } + + return 0; +} + +static int bf5xx_i2s_probe(struct platform_device *pdev, + struct snd_soc_dai *dai) +{ + u16 sport_req[][7] = { + { P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, + P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0}, + { P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, + P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0}, + }; + + if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) { + pr_err("Requesting Peripherals failed\n"); + return -EFAULT; + } + + pr_debug("%s enter\n", __func__); + + /* request DMA for SPORT */ + sport_handle = sport_init(&sport_params[sport_num], 4, \ + 2 * sizeof(u32), NULL); + if (!sport_handle) { + peripheral_free_list(&sport_req[sport_num][0]); + return -ENODEV; + } + + return 0; +} + +#ifdef CONFIG_PM +static int bf5xx_i2s_suspend(struct platform_device *dev, + struct snd_soc_dai *dai) +{ + struct sport_device *sport = + (struct sport_device *)dai->private_data; + + pr_debug("%s : sport %d\n", __func__, dai->id); + if (!dai->active) + return 0; + if (dai->capture.active) + sport_rx_stop(sport); + if (dai->playback.active) + sport_tx_stop(sport); + return 0; +} + +static int bf5xx_i2s_resume(struct platform_device *pdev, + struct snd_soc_dai *dai) +{ + int ret; + struct sport_device *sport = + (struct sport_device *)dai->private_data; + + pr_debug("%s : sport %d\n", __func__, dai->id); + if (!dai->active) + return 0; + + ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0); + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0); + if (ret) { + pr_err("SPORT is busy!\n"); + return -EBUSY; + } + + if (dai->capture.active) + sport_rx_start(sport); + if (dai->playback.active) + sport_tx_start(sport); + return 0; +} + +#else +#define bf5xx_i2s_suspend NULL +#define bf5xx_i2s_resume NULL +#endif + +#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ + SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ + SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \ + SNDRV_PCM_RATE_96000) + +#define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\ + SNDRV_PCM_FMTBIT_S32_LE) + +struct snd_soc_dai bf5xx_i2s_dai = { + .name = "bf5xx-i2s", + .id = 0, + .type = SND_SOC_DAI_I2S, + .probe = bf5xx_i2s_probe, + .suspend = bf5xx_i2s_suspend, + .resume = bf5xx_i2s_resume, + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = BF5XX_I2S_RATES, + .formats = BF5XX_I2S_FORMATS,}, + .capture = { + .channels_min = 2, + .channels_max = 2, + .rates = BF5XX_I2S_RATES, + .formats = BF5XX_I2S_FORMATS,}, + .ops = { + .hw_params = bf5xx_i2s_hw_params,}, + .dai_ops = { + .set_fmt = bf5xx_i2s_set_dai_fmt, + }, +}; +EXPORT_SYMBOL_GPL(bf5xx_i2s_dai); + +/* Module information */ +MODULE_AUTHOR("Cliff Cai"); +MODULE_DESCRIPTION("I2S driver for ADI Blackfin"); +MODULE_LICENSE("GPL"); + diff --git a/sound/soc/blackfin/bf5xx-i2s.h b/sound/soc/blackfin/bf5xx-i2s.h new file mode 100644 index 0000000..7107d1a --- /dev/null +++ b/sound/soc/blackfin/bf5xx-i2s.h @@ -0,0 +1,14 @@ +/* + * linux/sound/arm/bf5xx-i2s.h + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _BF5XX_I2S_H +#define _BF5XX_I2S_H + +extern struct snd_soc_dai bf5xx_i2s_dai; + +#endif