From: Ben Hutchings 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 +#include + +/* 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)