--- /dev/null
+/* -*- linux-c -*- *
+ *
+ * ALSA driver for the digigram lx6464es interface
+ * low-level interface
+ *
+ * Copyright (c) 2009 Tim Blechmann <tim@klingt.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; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ */
+
+/* #define RMH_DEBUG 1 */
+
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#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 (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
+ * */
+
+ u64 orun_mask;
+ u64 urun_mask;
+ 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);
+ }
+
+ orun_mask = ((u64)stat[7] << 32) + stat[8];
+ urun_mask = ((u64)stat[5] << 32) + stat[6];
+
+ /* 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);
+}
Code Review / kvmfornfv.git / blobdiff