V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encoder chip

Many thanks to Steve Toth from Hauppauge and Nattu Dakshinamurthy from
Conexant for their support. I am in particular thankful to Hauppauge
since without their help this driver would not exist. It should also
be noted that Steve did the work to get the DVB part up and running.
Thank you!

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: G. Andrew Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 120 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-av-firmware.c b/drivers/media/video/cx18/cx18-av-firmware.c
new file mode 100644
index 000000000000..526e142156cd
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-av-firmware.c
@@ -0,0 +1,120 @@
+/*
+ *  cx18 ADEC firmware functions
+ *
+ *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ *  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, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ *  02110-1301, USA.
+ */
+
+#include "cx18-driver.h"
+#include <linux/firmware.h>
+
+#define FWFILE "v4l-cx23418-dig.fw"
+
+int cx18_av_loadfw(struct cx18 *cx)
+{
+        const struct firmware *fw = NULL;
+        u32 size;
+        u32 v;
+        u8 *ptr;
+        int i;
+
+        if (request_firmware(&fw, FWFILE, &cx->dev->dev) != 0) {
+                CX18_ERR("unable to open firmware %s\n", FWFILE);
+                return -EINVAL;
+        }
+
+        cx18_av_write4(cx, CXADEC_CHIP_CTRL, 0x00010000);
+        cx18_av_write(cx, CXADEC_STD_DET_CTL, 0xf6); /* Byte 0 */
+
+        /* Reset the Mako core (Register is undocumented.) */
+        cx18_av_write4(cx, 0x8100, 0x00010000);
+
+        /* Put the 8051 in reset and enable firmware upload */
+        cx18_av_write4(cx, CXADEC_DL_CTL, 0x0F000000);
+
+        ptr = fw->data;
+        size = fw->size;
+
+        for (i = 0; i < size; i++) {
+                u32 dl_control = 0x0F000000 | ((u32)ptr[i] << 16);
+                u32 value = 0;
+                int retries;
+
+                for (retries = 0; retries < 5; retries++) {
+                        cx18_av_write4(cx, CXADEC_DL_CTL, dl_control);
+                        value = cx18_av_read4(cx, CXADEC_DL_CTL);
+                        if ((value & 0x3F00) == (dl_control & 0x3F00))
+                                break;
+                }
+                if (retries >= 5) {
+                        CX18_ERR("unable to load firmware %s\n", FWFILE);
+                        release_firmware(fw);
+                        return -EIO;
+                }
+        }
+
+        cx18_av_write4(cx, CXADEC_DL_CTL, 0x13000000 | fw->size);
+
+        /* Output to the 416 */
+        cx18_av_and_or4(cx, CXADEC_PIN_CTRL1, ~0, 0x78000);
+
+        /* Audio input control 1 set to Sony mode */
+        /* Audio output input 2 is 0 for slave operation input */
+        /* 0xC4000914[5]: 0 = left sample on WS=0, 1 = left sample on WS=1 */
+        /* 0xC4000914[7]: 0 = Philips mode, 1 = Sony mode (1st SCK rising edge
+           after WS transition for first bit of audio word. */
+        cx18_av_write4(cx, CXADEC_I2S_IN_CTL, 0x000000A0);
+
+        /* Audio output control 1 is set to Sony mode */
+        /* Audio output control 2 is set to 1 for master mode */
+        /* 0xC4000918[5]: 0 = left sample on WS=0, 1 = left sample on WS=1 */
+        /* 0xC4000918[7]: 0 = Philips mode, 1 = Sony mode (1st SCK rising edge
+           after WS transition for first bit of audio word. */
+        /* 0xC4000918[8]: 0 = slave operation, 1 = master (SCK_OUT and WS_OUT
+           are generated) */
+        cx18_av_write4(cx, CXADEC_I2S_OUT_CTL, 0x000001A0);
+
+        /* set alt I2s master clock to /16 and enable alt divider i2s
+           passthrough */
+        cx18_av_write4(cx, CXADEC_PIN_CFG3, 0x5000B687);
+
+        cx18_av_write4(cx, CXADEC_STD_DET_CTL, 0x000000F6);
+        /* CxDevWrReg(CXADEC_STD_DET_CTL, 0x000000FF); */
+
+        /* Set bit 0 in register 0x9CC to signify that this is MiniMe. */
+        /* Register 0x09CC is defined by the Merlin firmware, and doesn't
+           have a name in the spec. */
+        cx18_av_write4(cx, 0x09CC, 1);
+
+#define CX18_AUDIO_ENABLE               0xc72014
+        v = read_reg(CX18_AUDIO_ENABLE);
+        /* If bit 11 is 1 */
+        if (v & 0x800)
+                write_reg(v & 0xFFFFFBFF, CX18_AUDIO_ENABLE); /* Clear bit 10 */
+
+        /* Enable WW auto audio standard detection */
+        v = cx18_av_read4(cx, CXADEC_STD_DET_CTL);
+        v |= 0xFF;   /* Auto by default */
+        v |= 0x400;  /* Stereo by default */
+        v |= 0x14000000;
+        cx18_av_write4(cx, CXADEC_STD_DET_CTL, v);
+
+        release_firmware(fw);
+
+        CX18_INFO("loaded %s firmware (%d bytes)\n", FWFILE, size);
+        return 0;
+}