// SPDX-License-Identifier: GPL-2.0-or-later /* -*- linux-c -*- * * * ALSA driver for the digigram lx6464es interface * low-level interface * * Copyright (c) 2009 Tim Blechmann */ /* #define RMH_DEBUG 1 */ #include #include #include #include #include "lx6464es.h" #include "lx_core.h" /* low-level register access */ static const unsigned long dsp_port_offsets[] = { 0, 0x400, 0x401, 0x402, 0x403, 0x404, 0x405, 0x406, 0x407, 0x408, 0x409, 0x40a, 0x40b, 0x40c, 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x420, 0x430, 0x431, 0x432, 0x433, 0x434, 0x440 }; static void __iomem *lx_dsp_register(struct lx6464es *chip, int port) { void __iomem *base_address = chip->port_dsp_bar; return base_address + dsp_port_offsets[port]*4; } unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port) { void __iomem *address = lx_dsp_register(chip, port); return ioread32(address); } static void lx_dsp_reg_readbuf(struct lx6464es *chip, int port, u32 *data, u32 len) { u32 __iomem *address = lx_dsp_register(chip, port); int i; /* we cannot use memcpy_fromio */ for (i = 0; i != len; ++i) data[i] = ioread32(address + i); } void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data) { void __iomem *address = lx_dsp_register(chip, port); iowrite32(data, address); } static void lx_dsp_reg_writebuf(struct lx6464es *chip, int port, const u32 *data, u32 len) { u32 __iomem *address = lx_dsp_register(chip, port); int i; /* we cannot use memcpy_to */ for (i = 0; i != len; ++i) iowrite32(data[i], address + i); } static const unsigned long plx_port_offsets[] = { 0x04, 0x40, 0x44, 0x48, 0x4c, 0x50, 0x54, 0x58, 0x5c, 0x64, 0x68, 0x6C }; static void __iomem *lx_plx_register(struct lx6464es *chip, int port) { void __iomem *base_address = chip->port_plx_remapped; return base_address + plx_port_offsets[port]; } unsigned long lx_plx_reg_read(struct lx6464es *chip, int port) { void __iomem *address = lx_plx_register(chip, port); return ioread32(address); } void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data) { void __iomem *address = lx_plx_register(chip, port); iowrite32(data, address); } /* rmh */ #ifdef CONFIG_SND_DEBUG #define CMD_NAME(a) a #else #define CMD_NAME(a) NULL #endif #define Reg_CSM_MR 0x00000002 #define Reg_CSM_MC 0x00000001 struct dsp_cmd_info { u32 dcCodeOp; /* Op Code of the command (usually 1st 24-bits * word).*/ u16 dcCmdLength; /* Command length in words of 24 bits.*/ u16 dcStatusType; /* Status type: 0 for fixed length, 1 for * random. */ u16 dcStatusLength; /* Status length (if fixed).*/ char *dcOpName; }; /* Initialization and control data for the Microblaze interface - OpCode: the opcode field of the command set at the proper offset - CmdLength the number of command words - StatusType offset in the status registers: 0 means that the return value may be different from 0, and must be read - StatusLength the number of status words (in addition to the return value) */ static struct dsp_cmd_info dsp_commands[] = { { (CMD_00_INFO_DEBUG << OPCODE_OFFSET) , 1 /*custom*/ , 1 , 0 /**/ , CMD_NAME("INFO_DEBUG") }, { (CMD_01_GET_SYS_CFG << OPCODE_OFFSET) , 1 /**/ , 1 , 2 /**/ , CMD_NAME("GET_SYS_CFG") }, { (CMD_02_SET_GRANULARITY << OPCODE_OFFSET) , 1 /**/ , 1 , 0 /**/ , CMD_NAME("SET_GRANULARITY") }, { (CMD_03_SET_TIMER_IRQ << OPCODE_OFFSET) , 1 /**/ , 1 , 0 /**/ , CMD_NAME("SET_TIMER_IRQ") }, { (CMD_04_GET_EVENT << OPCODE_OFFSET) , 1 /**/ , 1 , 0 /*up to 10*/ , CMD_NAME("GET_EVENT") }, { (CMD_05_GET_PIPES << OPCODE_OFFSET) , 1 /**/ , 1 , 2 /*up to 4*/ , CMD_NAME("GET_PIPES") }, { (CMD_06_ALLOCATE_PIPE << OPCODE_OFFSET) , 1 /**/ , 0 , 0 /**/ , CMD_NAME("ALLOCATE_PIPE") }, { (CMD_07_RELEASE_PIPE << OPCODE_OFFSET) , 1 /**/ , 0 , 0 /**/ , CMD_NAME("RELEASE_PIPE") }, { (CMD_08_ASK_BUFFERS << OPCODE_OFFSET) , 1 /**/ , 1 , MAX_STREAM_BUFFER , CMD_NAME("ASK_BUFFERS") }, { (CMD_09_STOP_PIPE << OPCODE_OFFSET) , 1 /**/ , 0 , 0 /*up to 2*/ , CMD_NAME("STOP_PIPE") }, { (CMD_0A_GET_PIPE_SPL_COUNT << OPCODE_OFFSET) , 1 /**/ , 1 , 1 /*up to 2*/ , CMD_NAME("GET_PIPE_SPL_COUNT") }, { (CMD_0B_TOGGLE_PIPE_STATE << OPCODE_OFFSET) , 1 /*up to 5*/ , 1 , 0 /**/ , CMD_NAME("TOGGLE_PIPE_STATE") }, { (CMD_0C_DEF_STREAM << OPCODE_OFFSET) , 1 /*up to 4*/ , 1 , 0 /**/ , CMD_NAME("DEF_STREAM") }, { (CMD_0D_SET_MUTE << OPCODE_OFFSET) , 3 /**/ , 1 , 0 /**/ , CMD_NAME("SET_MUTE") }, { (CMD_0E_GET_STREAM_SPL_COUNT << OPCODE_OFFSET) , 1/**/ , 1 , 2 /**/ , CMD_NAME("GET_STREAM_SPL_COUNT") }, { (CMD_0F_UPDATE_BUFFER << OPCODE_OFFSET) , 3 /*up to 4*/ , 0 , 1 /**/ , CMD_NAME("UPDATE_BUFFER") }, { (CMD_10_GET_BUFFER << OPCODE_OFFSET) , 1 /**/ , 1 , 4 /**/ , CMD_NAME("GET_BUFFER") }, { (CMD_11_CANCEL_BUFFER << OPCODE_OFFSET) , 1 /**/ , 1 , 1 /*up to 4*/ , CMD_NAME("CANCEL_BUFFER") }, { (CMD_12_GET_PEAK << OPCODE_OFFSET) , 1 /**/ , 1 , 1 /**/ , CMD_NAME("GET_PEAK") }, { (CMD_13_SET_STREAM_STATE << OPCODE_OFFSET) , 1 /**/ , 1 , 0 /**/ , CMD_NAME("SET_STREAM_STATE") }, }; static void lx_message_init(struct lx_rmh *rmh, enum cmd_mb_opcodes cmd) { snd_BUG_ON(cmd >= CMD_14_INVALID); rmh->cmd[0] = dsp_commands[cmd].dcCodeOp; rmh->cmd_len = dsp_commands[cmd].dcCmdLength; rmh->stat_len = dsp_commands[cmd].dcStatusLength; rmh->dsp_stat = dsp_commands[cmd].dcStatusType; rmh->cmd_idx = cmd; memset(&rmh->cmd[1], 0, (REG_CRM_NUMBER - 1) * sizeof(u32)); #ifdef CONFIG_SND_DEBUG memset(rmh->stat, 0, REG_CRM_NUMBER * sizeof(u32)); #endif #ifdef RMH_DEBUG rmh->cmd_idx = cmd; #endif } #ifdef RMH_DEBUG #define LXRMH "lx6464es rmh: " static void lx_message_dump(struct lx_rmh *rmh) { u8 idx = rmh->cmd_idx; int i; snd_printk(LXRMH "command %s\n", dsp_commands[idx].dcOpName); for (i = 0; i != rmh->cmd_len; ++i) snd_printk(LXRMH "\tcmd[%d] %08x\n", i, rmh->cmd[i]); for (i = 0; i != rmh->stat_len; ++i) snd_printk(LXRMH "\tstat[%d]: %08x\n", i, rmh->stat[i]); snd_printk("\n"); } #else static inline void lx_message_dump(struct lx_rmh *rmh) {} #endif /* sleep 500 - 100 = 400 times 100us -> the timeout is >= 40 ms */ #define XILINX_TIMEOUT_MS 40 #define XILINX_POLL_NO_SLEEP 100 #define XILINX_POLL_ITERATIONS 150 static int lx_message_send_atomic(struct lx6464es *chip, struct lx_rmh *rmh) { u32 reg = ED_DSP_TIMED_OUT; int dwloop; if (lx_dsp_reg_read(chip, eReg_CSM) & (Reg_CSM_MC | Reg_CSM_MR)) { dev_err(chip->card->dev, "PIOSendMessage eReg_CSM %x\n", reg); return -EBUSY; } /* write command */ lx_dsp_reg_writebuf(chip, eReg_CRM1, rmh->cmd, rmh->cmd_len); /* MicoBlaze gogogo */ lx_dsp_reg_write(chip, eReg_CSM, Reg_CSM_MC); /* wait for device to answer */ for (dwloop = 0; dwloop != XILINX_TIMEOUT_MS * 1000; ++dwloop) { if (lx_dsp_reg_read(chip, eReg_CSM) & Reg_CSM_MR) { if (rmh->dsp_stat == 0) reg = lx_dsp_reg_read(chip, eReg_CRM1); else reg = 0; goto polling_successful; } else udelay(1); } dev_warn(chip->card->dev, "TIMEOUT lx_message_send_atomic! " "polling failed\n"); polling_successful: if ((reg & ERROR_VALUE) == 0) { /* read response */ if (rmh->stat_len) { snd_BUG_ON(rmh->stat_len >= (REG_CRM_NUMBER-1)); lx_dsp_reg_readbuf(chip, eReg_CRM2, rmh->stat, rmh->stat_len); } } else dev_err(chip->card->dev, "rmh error: %08x\n", reg); /* clear Reg_CSM_MR */ lx_dsp_reg_write(chip, eReg_CSM, 0); switch (reg) { case ED_DSP_TIMED_OUT: dev_warn(chip->card->dev, "lx_message_send: dsp timeout\n"); return -ETIMEDOUT; case ED_DSP_CRASHED: dev_warn(chip->card->dev, "lx_message_send: dsp crashed\n"); return -EAGAIN; } lx_message_dump(rmh); return reg; } /* low-level dsp access */ int lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version) { u16 ret; mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG); ret = lx_message_send_atomic(chip, &chip->rmh); *rdsp_version = chip->rmh.stat[1]; mutex_unlock(&chip->msg_lock); return ret; } int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq) { u16 ret = 0; u32 freq_raw = 0; u32 freq = 0; u32 frequency = 0; mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG); ret = lx_message_send_atomic(chip, &chip->rmh); if (ret == 0) { freq_raw = chip->rmh.stat[0] >> FREQ_FIELD_OFFSET; freq = freq_raw & XES_FREQ_COUNT8_MASK; if ((freq < XES_FREQ_COUNT8_48_MAX) || (freq > XES_FREQ_COUNT8_44_MIN)) frequency = 0; /* unknown */ else if (freq >= XES_FREQ_COUNT8_44_MAX) frequency = 44100; else frequency = 48000; } mutex_unlock(&chip->msg_lock); *rfreq = frequency * chip->freq_ratio; return ret; } int lx_dsp_get_mac(struct lx6464es *chip) { u32 macmsb, maclsb; macmsb = lx_dsp_reg_read(chip, eReg_ADMACESMSB) & 0x00FFFFFF; maclsb = lx_dsp_reg_read(chip, eReg_ADMACESLSB) & 0x00FFFFFF; /* todo: endianess handling */ chip->mac_address[5] = ((u8 *)(&maclsb))[0]; chip->mac_address[4] = ((u8 *)(&maclsb))[1]; chip->mac_address[3] = ((u8 *)(&maclsb))[2]; chip->mac_address[2] = ((u8 *)(&macmsb))[0]; chip->mac_address[1] = ((u8 *)(&macmsb))[1]; chip->mac_address[0] = ((u8 *)(&macmsb))[2]; return 0; } int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran) { int ret; mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_02_SET_GRANULARITY); chip->rmh.cmd[0] |= gran; ret = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return ret; } int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data) { int ret; mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_04_GET_EVENT); chip->rmh.stat_len = 9; /* we don't necessarily need the full length */ ret = lx_message_send_atomic(chip, &chip->rmh); if (!ret) memcpy(data, chip->rmh.stat, chip->rmh.stat_len * sizeof(u32)); mutex_unlock(&chip->msg_lock); return ret; } #define PIPE_INFO_TO_CMD(capture, pipe) \ ((u32)((u32)(pipe) | ((capture) ? ID_IS_CAPTURE : 0L)) << ID_OFFSET) /* low-level pipe handling */ int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture, int channels) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_06_ALLOCATE_PIPE); chip->rmh.cmd[0] |= pipe_cmd; chip->rmh.cmd[0] |= channels; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); if (err != 0) dev_err(chip->card->dev, "could not allocate pipe\n"); return err; } int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_07_RELEASE_PIPE); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture, u32 *r_needed, u32 *r_freed, u32 *size_array) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); #ifdef CONFIG_SND_DEBUG if (size_array) memset(size_array, 0, sizeof(u32)*MAX_STREAM_BUFFER); #endif *r_needed = 0; *r_freed = 0; mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_08_ASK_BUFFERS); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); if (!err) { int i; for (i = 0; i < MAX_STREAM_BUFFER; ++i) { u32 stat = chip->rmh.stat[i]; if (stat & (BF_EOB << BUFF_FLAGS_OFFSET)) { /* finished */ *r_freed += 1; if (size_array) size_array[i] = stat & MASK_DATA_SIZE; } else if ((stat & (BF_VALID << BUFF_FLAGS_OFFSET)) == 0) /* free */ *r_needed += 1; } dev_dbg(chip->card->dev, "CMD_08_ASK_BUFFERS: needed %d, freed %d\n", *r_needed, *r_freed); for (i = 0; i < MAX_STREAM_BUFFER; ++i) { for (i = 0; i != chip->rmh.stat_len; ++i) dev_dbg(chip->card->dev, " stat[%d]: %x, %x\n", i, chip->rmh.stat[i], chip->rmh.stat[i] & MASK_DATA_SIZE); } } mutex_unlock(&chip->msg_lock); return err; } int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_09_STOP_PIPE); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } static int lx_pipe_toggle_state(struct lx6464es *chip, u32 pipe, int is_capture) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0B_TOGGLE_PIPE_STATE); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture) { int err; err = lx_pipe_wait_for_idle(chip, pipe, is_capture); if (err < 0) return err; err = lx_pipe_toggle_state(chip, pipe, is_capture); return err; } int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture) { int err = 0; err = lx_pipe_wait_for_start(chip, pipe, is_capture); if (err < 0) return err; err = lx_pipe_toggle_state(chip, pipe, is_capture); return err; } int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture, u64 *rsample_count) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT); chip->rmh.cmd[0] |= pipe_cmd; chip->rmh.stat_len = 2; /* need all words here! */ err = lx_message_send_atomic(chip, &chip->rmh); /* don't sleep! */ if (err != 0) dev_err(chip->card->dev, "could not query pipe's sample count\n"); else { *rsample_count = ((u64)(chip->rmh.stat[0] & MASK_SPL_COUNT_HI) << 24) /* hi part */ + chip->rmh.stat[1]; /* lo part */ } mutex_unlock(&chip->msg_lock); return err; } int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); if (err != 0) dev_err(chip->card->dev, "could not query pipe's state\n"); else *rstate = (chip->rmh.stat[0] >> PSTATE_OFFSET) & 0x0F; mutex_unlock(&chip->msg_lock); return err; } static int lx_pipe_wait_for_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 state) { int i; /* max 2*PCMOnlyGranularity = 2*1024 at 44100 = < 50 ms: * timeout 50 ms */ for (i = 0; i != 50; ++i) { u16 current_state; int err = lx_pipe_state(chip, pipe, is_capture, ¤t_state); if (err < 0) return err; if (!err && current_state == state) return 0; mdelay(1); } return -ETIMEDOUT; } int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture) { return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_RUN); } int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture) { return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_IDLE); } /* low-level stream handling */ int lx_stream_set_state(struct lx6464es *chip, u32 pipe, int is_capture, enum stream_state_t state) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_13_SET_STREAM_STATE); chip->rmh.cmd[0] |= pipe_cmd; chip->rmh.cmd[0] |= state; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime, u32 pipe, int is_capture) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); u32 channels = runtime->channels; if (runtime->channels != channels) dev_err(chip->card->dev, "channel count mismatch: %d vs %d", runtime->channels, channels); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0C_DEF_STREAM); chip->rmh.cmd[0] |= pipe_cmd; if (runtime->sample_bits == 16) /* 16 bit format */ chip->rmh.cmd[0] |= (STREAM_FMT_16b << STREAM_FMT_OFFSET); if (snd_pcm_format_little_endian(runtime->format)) /* little endian/intel format */ chip->rmh.cmd[0] |= (STREAM_FMT_intel << STREAM_FMT_OFFSET); chip->rmh.cmd[0] |= channels-1; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture, int *rstate) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); *rstate = (chip->rmh.stat[0] & SF_START) ? START_STATE : PAUSE_STATE; mutex_unlock(&chip->msg_lock); return err; } int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture, u64 *r_bytepos) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT); chip->rmh.cmd[0] |= pipe_cmd; err = lx_message_send_atomic(chip, &chip->rmh); *r_bytepos = ((u64) (chip->rmh.stat[0] & MASK_SPL_COUNT_HI) << 32) /* hi part */ + chip->rmh.stat[1]; /* lo part */ mutex_unlock(&chip->msg_lock); return err; } /* low-level buffer handling */ int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture, u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi, u32 *r_buffer_index) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0F_UPDATE_BUFFER); chip->rmh.cmd[0] |= pipe_cmd; chip->rmh.cmd[0] |= BF_NOTIFY_EOB; /* request interrupt notification */ /* todo: pause request, circular buffer */ chip->rmh.cmd[1] = buffer_size & MASK_DATA_SIZE; chip->rmh.cmd[2] = buf_address_lo; if (buf_address_hi) { chip->rmh.cmd_len = 4; chip->rmh.cmd[3] = buf_address_hi; chip->rmh.cmd[0] |= BF_64BITS_ADR; } err = lx_message_send_atomic(chip, &chip->rmh); if (err == 0) { *r_buffer_index = chip->rmh.stat[0]; goto done; } if (err == EB_RBUFFERS_TABLE_OVERFLOW) dev_err(chip->card->dev, "lx_buffer_give EB_RBUFFERS_TABLE_OVERFLOW\n"); if (err == EB_INVALID_STREAM) dev_err(chip->card->dev, "lx_buffer_give EB_INVALID_STREAM\n"); if (err == EB_CMD_REFUSED) dev_err(chip->card->dev, "lx_buffer_give EB_CMD_REFUSED\n"); done: mutex_unlock(&chip->msg_lock); return err; } int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture, u32 *r_buffer_size) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER); chip->rmh.cmd[0] |= pipe_cmd; chip->rmh.cmd[0] |= MASK_BUFFER_ID; /* ask for the current buffer: the * microblaze will seek for it */ err = lx_message_send_atomic(chip, &chip->rmh); if (err == 0) *r_buffer_size = chip->rmh.stat[0] & MASK_DATA_SIZE; mutex_unlock(&chip->msg_lock); return err; } int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture, u32 buffer_index) { int err; u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe); mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER); chip->rmh.cmd[0] |= pipe_cmd; chip->rmh.cmd[0] |= buffer_index; err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } /* low-level gain/peak handling * * \todo: can we unmute capture/playback channels independently? * * */ int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute) { int err; /* bit set to 1: channel muted */ u64 mute_mask = unmute ? 0 : 0xFFFFFFFFFFFFFFFFLLU; mutex_lock(&chip->msg_lock); lx_message_init(&chip->rmh, CMD_0D_SET_MUTE); chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, 0); chip->rmh.cmd[1] = (u32)(mute_mask >> (u64)32); /* hi part */ chip->rmh.cmd[2] = (u32)(mute_mask & (u64)0xFFFFFFFF); /* lo part */ dev_dbg(chip->card->dev, "mute %x %x %x\n", chip->rmh.cmd[0], chip->rmh.cmd[1], chip->rmh.cmd[2]); err = lx_message_send_atomic(chip, &chip->rmh); mutex_unlock(&chip->msg_lock); return err; } static u32 peak_map[] = { 0x00000109, /* -90.308dB */ 0x0000083B, /* -72.247dB */ 0x000020C4, /* -60.205dB */ 0x00008273, /* -48.030dB */ 0x00020756, /* -36.005dB */ 0x00040C37, /* -30.001dB */ 0x00081385, /* -24.002dB */ 0x00101D3F, /* -18.000dB */ 0x0016C310, /* -15.000dB */ 0x002026F2, /* -12.001dB */ 0x002D6A86, /* -9.000dB */ 0x004026E6, /* -6.004dB */ 0x005A9DF6, /* -3.000dB */ 0x0065AC8B, /* -2.000dB */ 0x00721481, /* -1.000dB */ 0x007FFFFF, /* FS */ }; int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels, u32 *r_levels) { int err = 0; int i; mutex_lock(&chip->msg_lock); for (i = 0; i < channels; i += 4) { u32 s0, s1, s2, s3; lx_message_init(&chip->rmh, CMD_12_GET_PEAK); chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, i); err = lx_message_send_atomic(chip, &chip->rmh); if (err == 0) { s0 = peak_map[chip->rmh.stat[0] & 0x0F]; s1 = peak_map[(chip->rmh.stat[0] >> 4) & 0xf]; s2 = peak_map[(chip->rmh.stat[0] >> 8) & 0xf]; s3 = peak_map[(chip->rmh.stat[0] >> 12) & 0xf]; } else s0 = s1 = s2 = s3 = 0; r_levels[0] = s0; r_levels[1] = s1; r_levels[2] = s2; r_levels[3] = s3; r_levels += 4; } mutex_unlock(&chip->msg_lock); return err; } /* interrupt handling */ #define PCX_IRQ_NONE 0 #define IRQCS_ACTIVE_PCIDB BIT(13) #define IRQCS_ENABLE_PCIIRQ BIT(8) #define IRQCS_ENABLE_PCIDB BIT(9) static u32 lx_interrupt_test_ack(struct lx6464es *chip) { u32 irqcs = lx_plx_reg_read(chip, ePLX_IRQCS); /* Test if PCI Doorbell interrupt is active */ if (irqcs & IRQCS_ACTIVE_PCIDB) { u32 temp; irqcs = PCX_IRQ_NONE; while ((temp = lx_plx_reg_read(chip, ePLX_L2PCIDB))) { /* RAZ interrupt */ irqcs |= temp; lx_plx_reg_write(chip, ePLX_L2PCIDB, temp); } return irqcs; } return PCX_IRQ_NONE; } static int lx_interrupt_ack(struct lx6464es *chip, u32 *r_irqsrc, int *r_async_pending, int *r_async_escmd) { u32 irq_async; u32 irqsrc = lx_interrupt_test_ack(chip); if (irqsrc == PCX_IRQ_NONE) return 0; *r_irqsrc = irqsrc; irq_async = irqsrc & MASK_SYS_ASYNC_EVENTS; /* + EtherSound response * (set by xilinx) + EOB */ if (irq_async & MASK_SYS_STATUS_ESA) { irq_async &= ~MASK_SYS_STATUS_ESA; *r_async_escmd = 1; } if (irq_async) { /* dev_dbg(chip->card->dev, "interrupt: async event pending\n"); */ *r_async_pending = 1; } return 1; } static int lx_interrupt_handle_async_events(struct lx6464es *chip, u32 irqsrc, int *r_freq_changed, u64 *r_notified_in_pipe_mask, u64 *r_notified_out_pipe_mask) { int err; u32 stat[9]; /* answer from CMD_04_GET_EVENT */ /* We can optimize this to not read dumb events. * Answer words are in the following order: * Stat[0] general status * Stat[1] end of buffer OUT pF * Stat[2] end of buffer OUT pf * Stat[3] end of buffer IN pF * Stat[4] end of buffer IN pf * Stat[5] MSB underrun * Stat[6] LSB underrun * Stat[7] MSB overrun * Stat[8] LSB overrun * */ int eb_pending_out = (irqsrc & MASK_SYS_STATUS_EOBO) ? 1 : 0; int eb_pending_in = (irqsrc & MASK_SYS_STATUS_EOBI) ? 1 : 0; *r_freq_changed = (irqsrc & MASK_SYS_STATUS_FREQ) ? 1 : 0; err = lx_dsp_read_async_events(chip, stat); if (err < 0) return err; if (eb_pending_in) { *r_notified_in_pipe_mask = ((u64)stat[3] << 32) + stat[4]; dev_dbg(chip->card->dev, "interrupt: EOBI pending %llx\n", *r_notified_in_pipe_mask); } if (eb_pending_out) { *r_notified_out_pipe_mask = ((u64)stat[1] << 32) + stat[2]; dev_dbg(chip->card->dev, "interrupt: EOBO pending %llx\n", *r_notified_out_pipe_mask); } /* todo: handle xrun notification */ return err; } static int lx_interrupt_request_new_buffer(struct lx6464es *chip, struct lx_stream *lx_stream) { struct snd_pcm_substream *substream = lx_stream->stream; const unsigned int is_capture = lx_stream->is_capture; int err; const u32 channels = substream->runtime->channels; const u32 bytes_per_frame = channels * 3; const u32 period_size = substream->runtime->period_size; const u32 period_bytes = period_size * bytes_per_frame; const u32 pos = lx_stream->frame_pos; const u32 next_pos = ((pos+1) == substream->runtime->periods) ? 0 : pos + 1; dma_addr_t buf = substream->dma_buffer.addr + pos * period_bytes; u32 buf_hi = 0; u32 buf_lo = 0; u32 buffer_index = 0; u32 needed, freed; u32 size_array[MAX_STREAM_BUFFER]; dev_dbg(chip->card->dev, "->lx_interrupt_request_new_buffer\n"); mutex_lock(&chip->lock); err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array); dev_dbg(chip->card->dev, "interrupt: needed %d, freed %d\n", needed, freed); unpack_pointer(buf, &buf_lo, &buf_hi); err = lx_buffer_give(chip, 0, is_capture, period_bytes, buf_lo, buf_hi, &buffer_index); dev_dbg(chip->card->dev, "interrupt: gave buffer index %x on 0x%lx (%d bytes)\n", buffer_index, (unsigned long)buf, period_bytes); lx_stream->frame_pos = next_pos; mutex_unlock(&chip->lock); return err; } irqreturn_t lx_interrupt(int irq, void *dev_id) { struct lx6464es *chip = dev_id; int async_pending, async_escmd; u32 irqsrc; bool wake_thread = false; dev_dbg(chip->card->dev, "**************************************************\n"); if (!lx_interrupt_ack(chip, &irqsrc, &async_pending, &async_escmd)) { dev_dbg(chip->card->dev, "IRQ_NONE\n"); return IRQ_NONE; /* this device did not cause the interrupt */ } if (irqsrc & MASK_SYS_STATUS_CMD_DONE) return IRQ_HANDLED; if (irqsrc & MASK_SYS_STATUS_EOBI) dev_dbg(chip->card->dev, "interrupt: EOBI\n"); if (irqsrc & MASK_SYS_STATUS_EOBO) dev_dbg(chip->card->dev, "interrupt: EOBO\n"); if (irqsrc & MASK_SYS_STATUS_URUN) dev_dbg(chip->card->dev, "interrupt: URUN\n"); if (irqsrc & MASK_SYS_STATUS_ORUN) dev_dbg(chip->card->dev, "interrupt: ORUN\n"); if (async_pending) { wake_thread = true; chip->irqsrc = irqsrc; } if (async_escmd) { /* backdoor for ethersound commands * * for now, we do not need this * * */ dev_dbg(chip->card->dev, "interrupt requests escmd handling\n"); } return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED; } irqreturn_t lx_threaded_irq(int irq, void *dev_id) { struct lx6464es *chip = dev_id; u64 notified_in_pipe_mask = 0; u64 notified_out_pipe_mask = 0; int freq_changed; int err; /* handle async events */ err = lx_interrupt_handle_async_events(chip, chip->irqsrc, &freq_changed, ¬ified_in_pipe_mask, ¬ified_out_pipe_mask); if (err) dev_err(chip->card->dev, "error handling async events\n"); if (notified_in_pipe_mask) { struct lx_stream *lx_stream = &chip->capture_stream; dev_dbg(chip->card->dev, "requesting audio transfer for capture\n"); err = lx_interrupt_request_new_buffer(chip, lx_stream); if (err < 0) dev_err(chip->card->dev, "cannot request new buffer for capture\n"); snd_pcm_period_elapsed(lx_stream->stream); } if (notified_out_pipe_mask) { struct lx_stream *lx_stream = &chip->playback_stream; dev_dbg(chip->card->dev, "requesting audio transfer for playback\n"); err = lx_interrupt_request_new_buffer(chip, lx_stream); if (err < 0) dev_err(chip->card->dev, "cannot request new buffer for playback\n"); snd_pcm_period_elapsed(lx_stream->stream); } return IRQ_HANDLED; } static void lx_irq_set(struct lx6464es *chip, int enable) { u32 reg = lx_plx_reg_read(chip, ePLX_IRQCS); /* enable/disable interrupts * * Set the Doorbell and PCI interrupt enable bits * * */ if (enable) reg |= (IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB); else reg &= ~(IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB); lx_plx_reg_write(chip, ePLX_IRQCS, reg); } void lx_irq_enable(struct lx6464es *chip) { dev_dbg(chip->card->dev, "->lx_irq_enable\n"); lx_irq_set(chip, 1); } void lx_irq_disable(struct lx6464es *chip) { dev_dbg(chip->card->dev, "->lx_irq_disable\n"); lx_irq_set(chip, 0); }