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path: root/drivers/media/usb/pvrusb2/pvrusb2-encoder.c
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Diffstat (limited to 'drivers/media/usb/pvrusb2/pvrusb2-encoder.c')
-rw-r--r--drivers/media/usb/pvrusb2/pvrusb2-encoder.c552
1 files changed, 552 insertions, 0 deletions
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-encoder.c b/drivers/media/usb/pvrusb2/pvrusb2-encoder.c
new file mode 100644
index 000000000000..e046fdaec5ae
--- /dev/null
+++ b/drivers/media/usb/pvrusb2/pvrusb2-encoder.c
@@ -0,0 +1,552 @@
+/*
+ *
+ *
+ * Copyright (C) 2005 Mike Isely <isely@pobox.com>
+ * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
+ *
+ * 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
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/device.h> // for linux/firmware.h
+#include <linux/firmware.h>
+#include "pvrusb2-util.h"
+#include "pvrusb2-encoder.h"
+#include "pvrusb2-hdw-internal.h"
+#include "pvrusb2-debug.h"
+#include "pvrusb2-fx2-cmd.h"
+
+
+
+/* Firmware mailbox flags - definitions found from ivtv */
+#define IVTV_MBOX_FIRMWARE_DONE 0x00000004
+#define IVTV_MBOX_DRIVER_DONE 0x00000002
+#define IVTV_MBOX_DRIVER_BUSY 0x00000001
+
+#define MBOX_BASE 0x44
+
+
+static int pvr2_encoder_write_words(struct pvr2_hdw *hdw,
+ unsigned int offs,
+ const u32 *data, unsigned int dlen)
+{
+ unsigned int idx,addr;
+ unsigned int bAddr;
+ int ret;
+ unsigned int chunkCnt;
+
+ /*
+
+ Format: First byte must be 0x01. Remaining 32 bit words are
+ spread out into chunks of 7 bytes each, with the first 4 bytes
+ being the data word (little endian), and the next 3 bytes
+ being the address where that data word is to be written (big
+ endian). Repeat request for additional words, with offset
+ adjusted accordingly.
+
+ */
+ while (dlen) {
+ chunkCnt = 8;
+ if (chunkCnt > dlen) chunkCnt = dlen;
+ memset(hdw->cmd_buffer,0,sizeof(hdw->cmd_buffer));
+ bAddr = 0;
+ hdw->cmd_buffer[bAddr++] = FX2CMD_MEM_WRITE_DWORD;
+ for (idx = 0; idx < chunkCnt; idx++) {
+ addr = idx + offs;
+ hdw->cmd_buffer[bAddr+6] = (addr & 0xffu);
+ hdw->cmd_buffer[bAddr+5] = ((addr>>8) & 0xffu);
+ hdw->cmd_buffer[bAddr+4] = ((addr>>16) & 0xffu);
+ PVR2_DECOMPOSE_LE(hdw->cmd_buffer, bAddr,data[idx]);
+ bAddr += 7;
+ }
+ ret = pvr2_send_request(hdw,
+ hdw->cmd_buffer,1+(chunkCnt*7),
+ NULL,0);
+ if (ret) return ret;
+ data += chunkCnt;
+ dlen -= chunkCnt;
+ offs += chunkCnt;
+ }
+
+ return 0;
+}
+
+
+static int pvr2_encoder_read_words(struct pvr2_hdw *hdw,
+ unsigned int offs,
+ u32 *data, unsigned int dlen)
+{
+ unsigned int idx;
+ int ret;
+ unsigned int chunkCnt;
+
+ /*
+
+ Format: First byte must be 0x02 (status check) or 0x28 (read
+ back block of 32 bit words). Next 6 bytes must be zero,
+ followed by a single byte of MBOX_BASE+offset for portion to
+ be read. Returned data is packed set of 32 bits words that
+ were read.
+
+ */
+
+ while (dlen) {
+ chunkCnt = 16;
+ if (chunkCnt > dlen) chunkCnt = dlen;
+ if (chunkCnt < 16) chunkCnt = 1;
+ hdw->cmd_buffer[0] =
+ ((chunkCnt == 1) ?
+ FX2CMD_MEM_READ_DWORD : FX2CMD_MEM_READ_64BYTES);
+ hdw->cmd_buffer[1] = 0;
+ hdw->cmd_buffer[2] = 0;
+ hdw->cmd_buffer[3] = 0;
+ hdw->cmd_buffer[4] = 0;
+ hdw->cmd_buffer[5] = ((offs>>16) & 0xffu);
+ hdw->cmd_buffer[6] = ((offs>>8) & 0xffu);
+ hdw->cmd_buffer[7] = (offs & 0xffu);
+ ret = pvr2_send_request(hdw,
+ hdw->cmd_buffer,8,
+ hdw->cmd_buffer,
+ (chunkCnt == 1 ? 4 : 16 * 4));
+ if (ret) return ret;
+
+ for (idx = 0; idx < chunkCnt; idx++) {
+ data[idx] = PVR2_COMPOSE_LE(hdw->cmd_buffer,idx*4);
+ }
+ data += chunkCnt;
+ dlen -= chunkCnt;
+ offs += chunkCnt;
+ }
+
+ return 0;
+}
+
+
+/* This prototype is set up to be compatible with the
+ cx2341x_mbox_func prototype in cx2341x.h, which should be in
+ kernels 2.6.18 or later. We do this so that we can enable
+ cx2341x.ko to write to our encoder (by handing it a pointer to this
+ function). For earlier kernels this doesn't really matter. */
+static int pvr2_encoder_cmd(void *ctxt,
+ u32 cmd,
+ int arg_cnt_send,
+ int arg_cnt_recv,
+ u32 *argp)
+{
+ unsigned int poll_count;
+ unsigned int try_count = 0;
+ int retry_flag;
+ int ret = 0;
+ unsigned int idx;
+ /* These sizes look to be limited by the FX2 firmware implementation */
+ u32 wrData[16];
+ u32 rdData[16];
+ struct pvr2_hdw *hdw = (struct pvr2_hdw *)ctxt;
+
+
+ /*
+
+ The encoder seems to speak entirely using blocks 32 bit words.
+ In ivtv driver terms, this is a mailbox at MBOX_BASE which we
+ populate with data and watch what the hardware does with it.
+ The first word is a set of flags used to control the
+ transaction, the second word is the command to execute, the
+ third byte is zero (ivtv driver suggests that this is some
+ kind of return value), and the fourth byte is a specified
+ timeout (windows driver always uses 0x00060000 except for one
+ case when it is zero). All successive words are the argument
+ words for the command.
+
+ First, write out the entire set of words, with the first word
+ being zero.
+
+ Next, write out just the first word again, but set it to
+ IVTV_MBOX_DRIVER_DONE | IVTV_DRIVER_BUSY this time (which
+ probably means "go").
+
+ Next, read back the return count words. Check the first word,
+ which should have IVTV_MBOX_FIRMWARE_DONE set. If however
+ that bit is not set, then the command isn't done so repeat the
+ read until it is set.
+
+ Finally, write out just the first word again, but set it to
+ 0x0 this time (which probably means "idle").
+
+ */
+
+ if (arg_cnt_send > (ARRAY_SIZE(wrData) - 4)) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Failed to write cx23416 command"
+ " - too many input arguments"
+ " (was given %u limit %lu)",
+ arg_cnt_send, (long unsigned) ARRAY_SIZE(wrData) - 4);
+ return -EINVAL;
+ }
+
+ if (arg_cnt_recv > (ARRAY_SIZE(rdData) - 4)) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Failed to write cx23416 command"
+ " - too many return arguments"
+ " (was given %u limit %lu)",
+ arg_cnt_recv, (long unsigned) ARRAY_SIZE(rdData) - 4);
+ return -EINVAL;
+ }
+
+
+ LOCK_TAKE(hdw->ctl_lock); do {
+
+ if (!hdw->state_encoder_ok) {
+ ret = -EIO;
+ break;
+ }
+
+ retry_flag = 0;
+ try_count++;
+ ret = 0;
+ wrData[0] = 0;
+ wrData[1] = cmd;
+ wrData[2] = 0;
+ wrData[3] = 0x00060000;
+ for (idx = 0; idx < arg_cnt_send; idx++) {
+ wrData[idx+4] = argp[idx];
+ }
+ for (; idx < ARRAY_SIZE(wrData) - 4; idx++) {
+ wrData[idx+4] = 0;
+ }
+
+ ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,idx);
+ if (ret) break;
+ wrData[0] = IVTV_MBOX_DRIVER_DONE|IVTV_MBOX_DRIVER_BUSY;
+ ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1);
+ if (ret) break;
+ poll_count = 0;
+ while (1) {
+ poll_count++;
+ ret = pvr2_encoder_read_words(hdw,MBOX_BASE,rdData,
+ arg_cnt_recv+4);
+ if (ret) {
+ break;
+ }
+ if (rdData[0] & IVTV_MBOX_FIRMWARE_DONE) {
+ break;
+ }
+ if (rdData[0] && (poll_count < 1000)) continue;
+ if (!rdData[0]) {
+ retry_flag = !0;
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Encoder timed out waiting for us"
+ "; arranging to retry");
+ } else {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "***WARNING*** device's encoder"
+ " appears to be stuck"
+ " (status=0x%08x)",rdData[0]);
+ }
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Encoder command: 0x%02x",cmd);
+ for (idx = 4; idx < arg_cnt_send; idx++) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Encoder arg%d: 0x%08x",
+ idx-3,wrData[idx]);
+ }
+ ret = -EBUSY;
+ break;
+ }
+ if (retry_flag) {
+ if (try_count < 20) continue;
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Too many retries...");
+ ret = -EBUSY;
+ }
+ if (ret) {
+ del_timer_sync(&hdw->encoder_run_timer);
+ hdw->state_encoder_ok = 0;
+ pvr2_trace(PVR2_TRACE_STBITS,
+ "State bit %s <-- %s",
+ "state_encoder_ok",
+ (hdw->state_encoder_ok ? "true" : "false"));
+ if (hdw->state_encoder_runok) {
+ hdw->state_encoder_runok = 0;
+ pvr2_trace(PVR2_TRACE_STBITS,
+ "State bit %s <-- %s",
+ "state_encoder_runok",
+ (hdw->state_encoder_runok ?
+ "true" : "false"));
+ }
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Giving up on command."
+ " This is normally recovered via a firmware"
+ " reload and re-initialization; concern"
+ " is only warranted if this happens repeatedly"
+ " and rapidly.");
+ break;
+ }
+ wrData[0] = 0x7;
+ for (idx = 0; idx < arg_cnt_recv; idx++) {
+ argp[idx] = rdData[idx+4];
+ }
+
+ wrData[0] = 0x0;
+ ret = pvr2_encoder_write_words(hdw,MBOX_BASE,wrData,1);
+ if (ret) break;
+
+ } while(0); LOCK_GIVE(hdw->ctl_lock);
+
+ return ret;
+}
+
+
+static int pvr2_encoder_vcmd(struct pvr2_hdw *hdw, int cmd,
+ int args, ...)
+{
+ va_list vl;
+ unsigned int idx;
+ u32 data[12];
+
+ if (args > ARRAY_SIZE(data)) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Failed to write cx23416 command"
+ " - too many arguments"
+ " (was given %u limit %lu)",
+ args, (long unsigned) ARRAY_SIZE(data));
+ return -EINVAL;
+ }
+
+ va_start(vl, args);
+ for (idx = 0; idx < args; idx++) {
+ data[idx] = va_arg(vl, u32);
+ }
+ va_end(vl);
+
+ return pvr2_encoder_cmd(hdw,cmd,args,0,data);
+}
+
+
+/* This implements some extra setup for the encoder that seems to be
+ specific to the PVR USB2 hardware. */
+static int pvr2_encoder_prep_config(struct pvr2_hdw *hdw)
+{
+ int ret = 0;
+ int encMisc3Arg = 0;
+
+#if 0
+ /* This inexplicable bit happens in the Hauppauge windows
+ driver (for both 24xxx and 29xxx devices). However I
+ currently see no difference in behavior with or without
+ this stuff. Leave this here as a note of its existence,
+ but don't use it. */
+ LOCK_TAKE(hdw->ctl_lock); do {
+ u32 dat[1];
+ dat[0] = 0x80000640;
+ pvr2_encoder_write_words(hdw,0x01fe,dat,1);
+ pvr2_encoder_write_words(hdw,0x023e,dat,1);
+ } while(0); LOCK_GIVE(hdw->ctl_lock);
+#endif
+
+ /* Mike Isely <isely@pobox.com> 26-Jan-2006 The windows driver
+ sends the following list of ENC_MISC commands (for both
+ 24xxx and 29xxx devices). Meanings are not entirely clear,
+ however without the ENC_MISC(3,1) command then we risk
+ random perpetual video corruption whenever the video input
+ breaks up for a moment (like when switching channels). */
+
+
+#if 0
+ /* This ENC_MISC(5,0) command seems to hurt 29xxx sync
+ performance on channel changes, but is not a problem on
+ 24xxx devices. */
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 5,0,0,0);
+#endif
+
+ /* This ENC_MISC(3,encMisc3Arg) command is critical - without
+ it there will eventually be video corruption. Also, the
+ saa7115 case is strange - the Windows driver is passing 1
+ regardless of device type but if we have 1 for saa7115
+ devices the video turns sluggish. */
+ if (hdw->hdw_desc->flag_has_cx25840) {
+ encMisc3Arg = 1;
+ } else {
+ encMisc3Arg = 0;
+ }
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 3,
+ encMisc3Arg,0,0);
+
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 8,0,0,0);
+
+#if 0
+ /* This ENC_MISC(4,1) command is poisonous, so it is commented
+ out. But I'm leaving it here anyway to document its
+ existence in the Windows driver. The effect of this
+ command is that apps displaying the stream become sluggish
+ with stuttering video. */
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 4,1,0,0);
+#endif
+
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4, 0,3,0,0);
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC,4,15,0,0,0);
+
+ /* prevent the PTSs from slowly drifting away in the generated
+ MPEG stream */
+ ret |= pvr2_encoder_vcmd(hdw, CX2341X_ENC_MISC, 2, 4, 1);
+
+ return ret;
+}
+
+int pvr2_encoder_adjust(struct pvr2_hdw *hdw)
+{
+ int ret;
+ ret = cx2341x_update(hdw,pvr2_encoder_cmd,
+ (hdw->enc_cur_valid ? &hdw->enc_cur_state : NULL),
+ &hdw->enc_ctl_state);
+ if (ret) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "Error from cx2341x module code=%d",ret);
+ } else {
+ memcpy(&hdw->enc_cur_state,&hdw->enc_ctl_state,
+ sizeof(struct cx2341x_mpeg_params));
+ hdw->enc_cur_valid = !0;
+ }
+ return ret;
+}
+
+
+int pvr2_encoder_configure(struct pvr2_hdw *hdw)
+{
+ int ret;
+ int val;
+ pvr2_trace(PVR2_TRACE_ENCODER,"pvr2_encoder_configure"
+ " (cx2341x module)");
+ hdw->enc_ctl_state.port = CX2341X_PORT_STREAMING;
+ hdw->enc_ctl_state.width = hdw->res_hor_val;
+ hdw->enc_ctl_state.height = hdw->res_ver_val;
+ hdw->enc_ctl_state.is_50hz = ((hdw->std_mask_cur & V4L2_STD_525_60) ?
+ 0 : 1);
+
+ ret = 0;
+
+ ret |= pvr2_encoder_prep_config(hdw);
+
+ /* saa7115: 0xf0 */
+ val = 0xf0;
+ if (hdw->hdw_desc->flag_has_cx25840) {
+ /* ivtv cx25840: 0x140 */
+ val = 0x140;
+ }
+
+ if (!ret) ret = pvr2_encoder_vcmd(
+ hdw,CX2341X_ENC_SET_NUM_VSYNC_LINES, 2,
+ val, val);
+
+ /* setup firmware to notify us about some events (don't know why...) */
+ if (!ret) ret = pvr2_encoder_vcmd(
+ hdw,CX2341X_ENC_SET_EVENT_NOTIFICATION, 4,
+ 0, 0, 0x10000000, 0xffffffff);
+
+ if (!ret) ret = pvr2_encoder_vcmd(
+ hdw,CX2341X_ENC_SET_VBI_LINE, 5,
+ 0xffffffff,0,0,0,0);
+
+ if (ret) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "Failed to configure cx23416");
+ return ret;
+ }
+
+ ret = pvr2_encoder_adjust(hdw);
+ if (ret) return ret;
+
+ ret = pvr2_encoder_vcmd(
+ hdw, CX2341X_ENC_INITIALIZE_INPUT, 0);
+
+ if (ret) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "Failed to initialize cx23416 video input");
+ return ret;
+ }
+
+ return 0;
+}
+
+
+int pvr2_encoder_start(struct pvr2_hdw *hdw)
+{
+ int status;
+
+ /* unmask some interrupts */
+ pvr2_write_register(hdw, 0x0048, 0xbfffffff);
+
+ pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1,
+ hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0);
+
+ switch (hdw->active_stream_type) {
+ case pvr2_config_vbi:
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
+ 0x01,0x14);
+ break;
+ case pvr2_config_mpeg:
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
+ 0,0x13);
+ break;
+ default: /* Unhandled cases for now */
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
+ 0,0x13);
+ break;
+ }
+ return status;
+}
+
+int pvr2_encoder_stop(struct pvr2_hdw *hdw)
+{
+ int status;
+
+ /* mask all interrupts */
+ pvr2_write_register(hdw, 0x0048, 0xffffffff);
+
+ switch (hdw->active_stream_type) {
+ case pvr2_config_vbi:
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
+ 0x01,0x01,0x14);
+ break;
+ case pvr2_config_mpeg:
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
+ 0x01,0,0x13);
+ break;
+ default: /* Unhandled cases for now */
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
+ 0x01,0,0x13);
+ break;
+ }
+
+ return status;
+}
+
+
+/*
+ Stuff for Emacs to see, in order to encourage consistent editing style:
+ *** Local Variables: ***
+ *** mode: c ***
+ *** fill-column: 70 ***
+ *** tab-width: 8 ***
+ *** c-basic-offset: 8 ***
+ *** End: ***
+ */
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