[Nook HD, HD+ Q&A, Help & Troubleshooting] Jon Lee:
Has anyone tried this? We have the hardware behind it (twl6040).

I compiled the driver for it, and found the firmware blobs it wanted to load.

Insmod dmesg logs:

<3>[ 3012.835601] init: no such service 'fm_dl'
<3>[ 3014.386718] init: untracked pid 2225 exited
<3>[ 3015.045623] init: untracked pid 2213 exited
<6>[ 3015.710144] (stc): st_register(8)
<6>[ 3015.710174] (stc): chnl_id list empty :8
<6>[ 3015.710205] (stk) : st_kim_start
<6>[ 3015.710205] Enable wl12xx power
<6>[ 3015.917175] (stk) :ldisc_install = 1
<6>[ 3015.968597] (stc): st_tty_open
<6>[ 3015.968627] (stk) :line discipline installed
<6>[ 3015.969879] (stk) :TIInit_7.6.15.bts
<6>[ 3016.060791] (stc): add_channel_to_table: id 8
<6>[ 3016.726562] (stc): remove_channel_from_table: id 8
<6>[ 3016.726623] (stc): all chnl_ids unregistered
<6>[ 3016.726684] (stk) :ldisc_install = 0
<6>[ 3016.727081] (stc): st_tty_close
<6>[ 3016.729278] Disable wl12xx power
<6>[ 3023.407836] (stc): st_register(8)
<6>[ 3023.407897] (stc): chnl_id list empty :8
<6>[ 3023.407928] (stk) : st_kim_start
<6>[ 3023.407958] Enable wl12xx power
<6>[ 3023.615295] (stk) :ldisc_install = 1
<6>[ 3023.666046] (stc): st_tty_open
<6>[ 3023.666107] (stk) :line discipline installed
<6>[ 3023.666595] (stk) :TIInit_7.6.15.bts
<6>[ 3023.755706] (stc): add_channel_to_table: id 8

The radio app, itself, seems to want to work.

logcat logs

D/fm_apln ( 2190): freq_set_dlg_shw: Frequency changing to : 106500 KHz
D/fm_srvc ( 2190): dhrdw_freq_set fd: 6 freq: 106500
D/fm_hrdw ( 2190): hrdw_so_freq_set api_hndl: 6 freq: 106500
D/fm_hrdw ( 2190): gen_freq_set freq: 106500 limited: 106500
D/fm_hrdw ( 2190): rds_reset
D/fm_hrdw ( 2190): v4_freq_set: 106500
E/fm_hrdw ( 2190): iris_buf_display error: 22
E/fm_hrdw ( 2190): iris_buf_display error: 22
D/fm_srvc ( 2190): evt_pi_chngd
D/fm_srvc ( 2190): dhrdw_pi_get fd: 6
D/fm_hrdw ( 2190): hrdw_so_pi_get api_hndl: 6 pi: 0x0
D/fm_apln ( 2190): on_pi_chngd
D/fm_hrdw ( 2190): v4_freq_set VIDIOC_S_FREQUENCY success
D/fm_sttn ( 2190): pt_parse: 0
D/fm_apln ( 2190): run_on_pi_chngd run
D/fm_apln ( 2190): run_on_pi_chngd run pi: 0 cs: null
D/fm_apln ( 2190): run_on_pi_chngd run cs: 0000 m_just_pi: true m_just_pi_time: 1395133231826
E/fm_hrdw ( 2190): iris_buf_display error: 22
E/fm_hrdw ( 2190): iris_buf_display error: 22
D/fm_srvc ( 2190): evt_freq_chngd: freq: 106500
D/fm_apln ( 2190): on_freq_chngd freq: 106500
D/fm_apln ( 2190): ui_sttn_info_reset m_freq: 106500 sttn_name: 106.5
D/fm_sttn ( 2190): pt_parse: 0
D/fm_apln ( 2190): sttn_id_tv_set m_station_id: 0 sttn_id: PI: 0
D/fm_apln ( 2190): prefs_set int: last_frequency = 106500
E/fm_hrdw ( 2190): iris_buf_display error: 22
E/fm_hrdw ( 2190): iris_buf_display error: 22
D/fm_srvc ( 2190): dhrdw_pt_get fd: 6
D/fm_hrdw ( 2190): hrdw_so_pt_get api_hndl: 6 pt: -1
D/fm_srvc ( 2190): evt_pt_chngd: -1
D/fm_apln ( 2190): cb_on_pt_chngd
E/fm_hrdw ( 2190): iris_buf_display error: 22
E/fm_hrdw ( 2190): iris_buf_display error: 22
D/fm_srvc ( 2190): evt_ps_chngd:
D/fm_apln ( 2190): run_on_pt_chngd: -1
D/fm_sttn ( 2190): pt_parse: -1
D/fm_sttn ( 2190): pt_parse: -1
E/fm_hrdw ( 2190): iris_buf_display error: 22
E/fm_hrdw ( 2190): iris_buf_display error: 22
D/fm_srvc ( 2190): evt_rt_chngd:
D/fm_hrdw ( 2190): v4_rssi_get VIDIOC_G_TUNER success name: FM type: 1 cap: 0x91 lo: 1400000 hi: 1728000 sc: 3 am: 1 sig: 31097 afc: 0

No audio. I'm not sure if I just need to use a mixer to map it or if I have further driver problems.

Sometimes I get these errors?

<3>[ 3081.753814] fmdrv: Response SKB ptr not NULL
<3>[ 3081.754577] fmdrv: Response SKB is missing
<3>[ 3082.530303] fmdrv: Response SKB ptr not NULL
<3>[ 3082.531036] fmdrv: Response SKB is missing

Anyway, I'm thinking it's possible with some work.