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From: Ben Hutchings <ben@decadent.org.uk>
Date: Mon, 24 Aug 2009 23:19:58 +0100
Subject: af9005: Use request_firmware() to load register init script
Forwarded: no
Read the register init script from the Windows driver. This is sick
but should avoid the potential copyright infringement in distributing
a version of the script which is directly derived from the driver.
---
drivers/media/dvb/dvb-usb/Kconfig | 2 +-
drivers/media/dvb/dvb-usb/af9005-fe.c | 66 ++++++++++++++++++++++++++------
2 files changed, 54 insertions(+), 14 deletions(-)
Index: debian-kernel/drivers/media/usb/dvb-usb/Kconfig
===================================================================
--- debian-kernel.orig/drivers/media/usb/dvb-usb/Kconfig
+++ debian-kernel/drivers/media/usb/dvb-usb/Kconfig
@@ -260,10 +260,10 @@ config DVB_USB_OPERA1
config DVB_USB_AF9005
tristate "Afatech AF9005 DVB-T USB1.1 support"
- depends on BROKEN
depends on DVB_USB
select MEDIA_TUNER_MT2060 if MEDIA_SUBDRV_AUTOSELECT
select MEDIA_TUNER_QT1010 if MEDIA_SUBDRV_AUTOSELECT
+ select FW_LOADER
help
Say Y here to support the Afatech AF9005 based DVB-T USB1.1 receiver
and the TerraTec Cinergy T USB XE (Rev.1)
Index: debian-kernel/drivers/media/usb/dvb-usb/af9005-fe.c
===================================================================
--- debian-kernel.orig/drivers/media/usb/dvb-usb/af9005-fe.c
+++ debian-kernel/drivers/media/usb/dvb-usb/af9005-fe.c
@@ -9,10 +9,26 @@
* see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
*/
#include "af9005.h"
-#include "af9005-script.h"
#include "mt2060.h"
#include "qt1010.h"
#include <asm/div64.h>
+#include <linux/firmware.h>
+
+/* Register initialisation script to be extracted from the Windows driver */
+
+typedef struct {
+ __le16 reg;
+ u8 pos;
+ u8 len;
+ u8 val;
+ u8 pad;
+} __packed RegDesc;
+
+#define WIN_DRV_NAME "AF05BDA.sys"
+#define WIN_DRV_VERSION "6.3.2.1"
+#define WIN_DRV_SIZE 133504
+#define WIN_DRV_SCRIPT_OFFSET 88316
+#define WIN_DRV_SCRIPT_SIZE 1110
struct af9005_fe_state {
struct dvb_usb_device *d;
@@ -804,6 +820,8 @@ static int af9005_fe_init(struct dvb_fro
{
struct af9005_fe_state *state = fe->demodulator_priv;
struct dvb_usb_adapter *adap = fe->dvb->priv;
+ const struct firmware *fw;
+ const RegDesc *script;
int ret, i, scriptlen;
u8 temp, temp0 = 0, temp1 = 0, temp2 = 0;
u8 buf[2];
@@ -956,37 +974,55 @@ static int af9005_fe_init(struct dvb_fro
if ((ret = af9005_write_ofdm_register(state->d, 0xaefb, 0x01)))
return ret;
- /* load init script */
- deb_info("load init script\n");
- scriptlen = sizeof(script) / sizeof(RegDesc);
+ /* load and validate init script */
+ deb_info("load init script from Windows driver\n");
+ ret = request_firmware(&fw, WIN_DRV_NAME, &state->d->udev->dev);
+ if (ret)
+ return ret;
+ BUILD_BUG_ON(sizeof(RegDesc) != 6);
+ if (fw->size != WIN_DRV_SIZE ||
+ memcmp(fw->data + WIN_DRV_SCRIPT_OFFSET,
+ "\x80\xa1\x00\x08\x0a\x00", 6) ||
+ memcmp(fw->data + WIN_DRV_SCRIPT_OFFSET + WIN_DRV_SCRIPT_SIZE - 6,
+ "\x49\xa3\x00\x06\x02\x00", 6)) {
+ err("%s is invalid - should be version %s, size %u bytes\n",
+ WIN_DRV_NAME, WIN_DRV_VERSION, WIN_DRV_SIZE);
+ ret = -EINVAL;
+ goto fail_release;
+ }
+
+ script = (const RegDesc *)(fw->data + WIN_DRV_SCRIPT_OFFSET);
+ scriptlen = WIN_DRV_SCRIPT_SIZE / sizeof(RegDesc);
for (i = 0; i < scriptlen; i++) {
+ u16 reg = le16_to_cpu(script[i].reg);
if ((ret =
- af9005_write_register_bits(state->d, script[i].reg,
+ af9005_write_register_bits(state->d, reg,
script[i].pos,
script[i].len, script[i].val)))
- return ret;
+ goto fail_release;
/* save 3 bytes of original fcw */
- if (script[i].reg == 0xae18)
+ if (reg == 0xae18)
temp2 = script[i].val;
- if (script[i].reg == 0xae19)
+ if (reg == 0xae19)
temp1 = script[i].val;
- if (script[i].reg == 0xae1a)
+ if (reg == 0xae1a)
temp0 = script[i].val;
/* save original unplug threshold */
- if (script[i].reg == xd_p_reg_unplug_th)
+ if (reg == xd_p_reg_unplug_th)
state->original_if_unplug_th = script[i].val;
- if (script[i].reg == xd_p_reg_unplug_rf_gain_th)
+ if (reg == xd_p_reg_unplug_rf_gain_th)
state->original_rf_unplug_th = script[i].val;
- if (script[i].reg == xd_p_reg_unplug_dtop_if_gain_th)
+ if (reg == xd_p_reg_unplug_dtop_if_gain_th)
state->original_dtop_if_unplug_th = script[i].val;
- if (script[i].reg == xd_p_reg_unplug_dtop_rf_gain_th)
+ if (reg == xd_p_reg_unplug_dtop_rf_gain_th)
state->original_dtop_rf_unplug_th = script[i].val;
}
state->original_fcw =
((u32) temp2 << 16) + ((u32) temp1 << 8) + (u32) temp0;
+ release_firmware(fw);
/* save original TOPs */
deb_info("save original TOPs\n");
@@ -1066,6 +1102,10 @@ static int af9005_fe_init(struct dvb_fro
deb_info("profit!\n");
return 0;
+
+fail_release:
+ release_firmware(fw);
+ return ret;
}
static int af9005_fe_sleep(struct dvb_frontend *fe)
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