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path: root/drivers/media/video/pvrusb2/pvrusb2-encoder.c
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Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-encoder.c')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-encoder.c418
1 files changed, 418 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-encoder.c b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
new file mode 100644
index 00000000000..2cc31695b43
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-encoder.c
@@ -0,0 +1,418 @@
+/*
+ *
+ * $Id$
+ *
+ * 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"
+
+
+
+/* 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
+
+
+static int pvr2_encoder_write_words(struct pvr2_hdw *hdw,
+ const u32 *data, unsigned int dlen)
+{
+ unsigned int idx;
+ int ret;
+ unsigned int offs = 0;
+ unsigned int chunkCnt;
+
+ /*
+
+ Format: First byte must be 0x01. Remaining 32 bit words are
+ spread out into chunks of 7 bytes each, little-endian ordered,
+ offset at zero within each 2 blank bytes following and a
+ single byte that is 0x44 plus the offset of the word. 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));
+ hdw->cmd_buffer[0] = 0x01;
+ for (idx = 0; idx < chunkCnt; idx++) {
+ hdw->cmd_buffer[1+(idx*7)+6] = 0x44 + idx + offs;
+ PVR2_DECOMPOSE_LE(hdw->cmd_buffer, 1+(idx*7),
+ data[idx]);
+ }
+ ret = pvr2_send_request(hdw,
+ hdw->cmd_buffer,1+(chunkCnt*7),
+ 0,0);
+ if (ret) return ret;
+ data += chunkCnt;
+ dlen -= chunkCnt;
+ offs += chunkCnt;
+ }
+
+ return 0;
+}
+
+
+static int pvr2_encoder_read_words(struct pvr2_hdw *hdw,int statusFl,
+ u32 *data, unsigned int dlen)
+{
+ unsigned int idx;
+ int ret;
+ unsigned int offs = 0;
+ 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 0x44+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;
+ memset(hdw->cmd_buffer,0,sizeof(hdw->cmd_buffer));
+ hdw->cmd_buffer[0] = statusFl ? 0x02 : 0x28;
+ hdw->cmd_buffer[7] = 0x44 + offs;
+ ret = pvr2_send_request(hdw,
+ hdw->cmd_buffer,8,
+ hdw->cmd_buffer,chunkCnt * 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,
+ int cmd,
+ int arg_cnt_send,
+ int arg_cnt_recv,
+ u32 *argp)
+{
+ unsigned int poll_count;
+ 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 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 16 words as status. 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.
+
+ Next, read back 32 words and compare with the original
+ arugments. Hopefully they will match.
+
+ Finally, write out just the first word again, but set it to
+ 0x0 this time (which probably means "idle").
+
+ */
+
+ if (arg_cnt_send > (sizeof(wrData)/sizeof(wrData[0]))-4) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Failed to write cx23416 command"
+ " - too many input arguments"
+ " (was given %u limit %u)",
+ arg_cnt_send,
+ (unsigned int)(sizeof(wrData)/sizeof(wrData[0])) - 4);
+ return -EINVAL;
+ }
+
+ if (arg_cnt_recv > (sizeof(rdData)/sizeof(rdData[0]))-4) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Failed to write cx23416 command"
+ " - too many return arguments"
+ " (was given %u limit %u)",
+ arg_cnt_recv,
+ (unsigned int)(sizeof(rdData)/sizeof(rdData[0])) - 4);
+ return -EINVAL;
+ }
+
+
+ LOCK_TAKE(hdw->ctl_lock); do {
+
+ 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 < (sizeof(wrData)/sizeof(wrData[0]))-4; idx++) {
+ wrData[idx+4] = 0;
+ }
+
+ ret = pvr2_encoder_write_words(hdw,wrData,idx);
+ if (ret) break;
+ wrData[0] = IVTV_MBOX_DRIVER_DONE|IVTV_MBOX_DRIVER_BUSY;
+ ret = pvr2_encoder_write_words(hdw,wrData,1);
+ if (ret) break;
+ poll_count = 0;
+ while (1) {
+ if (poll_count < 10000000) poll_count++;
+ ret = pvr2_encoder_read_words(hdw,!0,rdData,1);
+ if (ret) break;
+ if (rdData[0] & IVTV_MBOX_FIRMWARE_DONE) {
+ break;
+ }
+ if (poll_count == 100) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "***WARNING*** device's encoder"
+ " appears to be stuck"
+ " (status=0%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]);
+ }
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Giving up waiting."
+ " It is likely that"
+ " this is a bad idea...");
+ ret = -EBUSY;
+ break;
+ }
+ }
+ if (ret) break;
+ wrData[0] = 0x7;
+ ret = pvr2_encoder_read_words(
+ hdw,0,rdData,
+ sizeof(rdData)/sizeof(rdData[0]));
+ if (ret) break;
+ for (idx = 0; idx < arg_cnt_recv; idx++) {
+ argp[idx] = rdData[idx+4];
+ }
+
+ wrData[0] = 0x0;
+ ret = pvr2_encoder_write_words(hdw,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 > sizeof(data)/sizeof(data[0])) {
+ pvr2_trace(
+ PVR2_TRACE_ERROR_LEGS,
+ "Failed to write cx23416 command"
+ " - too many arguments"
+ " (was given %u limit %u)",
+ args,(unsigned int)(sizeof(data)/sizeof(data[0])));
+ 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);
+}
+
+int pvr2_encoder_configure(struct pvr2_hdw *hdw)
+{
+ int ret;
+ 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_NTSC|V4L2_STD_PAL_M)) ?
+ 0 : 1);
+
+ ret = 0;
+
+ if (!ret) ret = pvr2_encoder_vcmd(
+ hdw,CX2341X_ENC_SET_NUM_VSYNC_LINES, 2,
+ 0xf0, 0xf0);
+
+ /* 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 cx32416");
+ return ret;
+ }
+
+ ret = cx2341x_update(hdw,pvr2_encoder_cmd,
+ (hdw->enc_cur_valid ? &hdw->enc_cur_state : 0),
+ &hdw->enc_ctl_state);
+ if (ret) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "Error from cx2341x module code=%d",ret);
+ return ret;
+ }
+
+ ret = 0;
+
+ if (!ret) ret = pvr2_encoder_vcmd(
+ hdw, CX2341X_ENC_INITIALIZE_INPUT, 0);
+
+ if (ret) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "Failed to initialize cx32416 video input");
+ return ret;
+ }
+
+ hdw->subsys_enabled_mask |= (1<<PVR2_SUBSYS_B_ENC_CFG);
+ memcpy(&hdw->enc_cur_state,&hdw->enc_ctl_state,
+ sizeof(struct cx2341x_mpeg_params));
+ hdw->enc_cur_valid = !0;
+ return 0;
+}
+
+
+int pvr2_encoder_start(struct pvr2_hdw *hdw)
+{
+ int status;
+
+ /* unmask some interrupts */
+ pvr2_write_register(hdw, 0x0048, 0xbfffffff);
+
+ /* change some GPIO data */
+ pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000481);
+ pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000);
+
+ if (hdw->config == pvr2_config_vbi) {
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
+ 0x01,0x14);
+ } else if (hdw->config == pvr2_config_mpeg) {
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
+ 0,0x13);
+ } else {
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2,
+ 0,0x13);
+ }
+ if (!status) {
+ hdw->subsys_enabled_mask |= (1<<PVR2_SUBSYS_B_ENC_RUN);
+ }
+ return status;
+}
+
+int pvr2_encoder_stop(struct pvr2_hdw *hdw)
+{
+ int status;
+
+ /* mask all interrupts */
+ pvr2_write_register(hdw, 0x0048, 0xffffffff);
+
+ if (hdw->config == pvr2_config_vbi) {
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
+ 0x01,0x01,0x14);
+ } else if (hdw->config == pvr2_config_mpeg) {
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
+ 0x01,0,0x13);
+ } else {
+ status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_STOP_CAPTURE,3,
+ 0x01,0,0x13);
+ }
+
+ /* change some GPIO data */
+ /* Note: Bit d7 of dir appears to control the LED. So we shut it
+ off here. */
+ pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000401);
+ pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000);
+
+ if (!status) {
+ hdw->subsys_enabled_mask &= ~(1<<PVR2_SUBSYS_B_ENC_RUN);
+ }
+ 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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