diff options
author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-11-12 12:46:28 -0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-11-13 10:02:22 -0800 |
commit | 7a0786c19d65bd4502b4a53aec9ef75e18192a00 (patch) | |
tree | 4674cd6fdcec0c7e5a77844694fbf30498894bf0 /drivers/media/dvb-frontends/gp8psk-fe.h | |
parent | 1596c387e970cb680d4031fbe4d6eb2c2a4ddb63 (diff) | |
download | op-kernel-dev-7a0786c19d65bd4502b4a53aec9ef75e18192a00.zip op-kernel-dev-7a0786c19d65bd4502b4a53aec9ef75e18192a00.tar.gz |
gp8psk: Fix DVB frontend attach
The DVB binding schema at the DVB core assumes that the frontend is a
separate driver. Faling to do that causes OOPS when the module is
removed, as it tries to do a symbol_put_addr on an internal symbol,
causing craches like:
WARNING: CPU: 1 PID: 28102 at kernel/module.c:1108 module_put+0x57/0x70
Modules linked in: dvb_usb_gp8psk(-) dvb_usb dvb_core nvidia_drm(PO) nvidia_modeset(PO) snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore nvidia(PO) [last unloaded: rc_core]
CPU: 1 PID: 28102 Comm: rmmod Tainted: P WC O 4.8.4-build.1 #1
Hardware name: MSI MS-7309/MS-7309, BIOS V1.12 02/23/2009
Call Trace:
dump_stack+0x44/0x64
__warn+0xfa/0x120
module_put+0x57/0x70
module_put+0x57/0x70
warn_slowpath_null+0x23/0x30
module_put+0x57/0x70
gp8psk_fe_set_frontend+0x460/0x460 [dvb_usb_gp8psk]
symbol_put_addr+0x27/0x50
dvb_usb_adapter_frontend_exit+0x3a/0x70 [dvb_usb]
From Derek's tests:
"Attach bug is fixed, tuning works, module unloads without
crashing. Everything seems ok!"
Reported-by: Derek <user.vdr@gmail.com>
Tested-by: Derek <user.vdr@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/media/dvb-frontends/gp8psk-fe.h')
-rw-r--r-- | drivers/media/dvb-frontends/gp8psk-fe.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/gp8psk-fe.h b/drivers/media/dvb-frontends/gp8psk-fe.h new file mode 100644 index 0000000..6c7944b --- /dev/null +++ b/drivers/media/dvb-frontends/gp8psk-fe.h @@ -0,0 +1,82 @@ +/* + * gp8psk_fe driver + * + * 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, 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. + */ + +#ifndef GP8PSK_FE_H +#define GP8PSK_FE_H + +#include <linux/types.h> + +/* gp8psk commands */ + +#define GET_8PSK_CONFIG 0x80 /* in */ +#define SET_8PSK_CONFIG 0x81 +#define I2C_WRITE 0x83 +#define I2C_READ 0x84 +#define ARM_TRANSFER 0x85 +#define TUNE_8PSK 0x86 +#define GET_SIGNAL_STRENGTH 0x87 /* in */ +#define LOAD_BCM4500 0x88 +#define BOOT_8PSK 0x89 /* in */ +#define START_INTERSIL 0x8A /* in */ +#define SET_LNB_VOLTAGE 0x8B +#define SET_22KHZ_TONE 0x8C +#define SEND_DISEQC_COMMAND 0x8D +#define SET_DVB_MODE 0x8E +#define SET_DN_SWITCH 0x8F +#define GET_SIGNAL_LOCK 0x90 /* in */ +#define GET_FW_VERS 0x92 +#define GET_SERIAL_NUMBER 0x93 /* in */ +#define USE_EXTRA_VOLT 0x94 +#define GET_FPGA_VERS 0x95 +#define CW3K_INIT 0x9d + +/* PSK_configuration bits */ +#define bm8pskStarted 0x01 +#define bm8pskFW_Loaded 0x02 +#define bmIntersilOn 0x04 +#define bmDVBmode 0x08 +#define bm22kHz 0x10 +#define bmSEL18V 0x20 +#define bmDCtuned 0x40 +#define bmArmed 0x80 + +/* Satellite modulation modes */ +#define ADV_MOD_DVB_QPSK 0 /* DVB-S QPSK */ +#define ADV_MOD_TURBO_QPSK 1 /* Turbo QPSK */ +#define ADV_MOD_TURBO_8PSK 2 /* Turbo 8PSK (also used for Trellis 8PSK) */ +#define ADV_MOD_TURBO_16QAM 3 /* Turbo 16QAM (also used for Trellis 8PSK) */ + +#define ADV_MOD_DCII_C_QPSK 4 /* Digicipher II Combo */ +#define ADV_MOD_DCII_I_QPSK 5 /* Digicipher II I-stream */ +#define ADV_MOD_DCII_Q_QPSK 6 /* Digicipher II Q-stream */ +#define ADV_MOD_DCII_C_OQPSK 7 /* Digicipher II offset QPSK */ +#define ADV_MOD_DSS_QPSK 8 /* DSS (DIRECTV) QPSK */ +#define ADV_MOD_DVB_BPSK 9 /* DVB-S BPSK */ + +/* firmware revision id's */ +#define GP8PSK_FW_REV1 0x020604 +#define GP8PSK_FW_REV2 0x020704 +#define GP8PSK_FW_VERS(_fw_vers) \ + ((_fw_vers)[2]<<0x10 | (_fw_vers)[1]<<0x08 | (_fw_vers)[0]) + +struct gp8psk_fe_ops { + int (*in)(void *priv, u8 req, u16 value, u16 index, u8 *b, int blen); + int (*out)(void *priv, u8 req, u16 value, u16 index, u8 *b, int blen); + int (*reload)(void *priv); +}; + +struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops, + void *priv, bool is_rev1); + +#endif |