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firmware/dsp: Send framenumber, TSC, checksum and magic via MCSI 

In addition to the last commit we now send:
 * a burst start magic
 * the framenumber
 * the Training Sequence Code number
 * 2 simple XOR checksums

The data of a burst now looks like:

struct burst {
	uint8_t  garbage1;
	uint8_t  magic[8];		/* "IQDATAv1" in ASCII */
	uint16_t iq_samples[302];
	uint16_t iq_lrc;
	uint8_t  garbage2;
	uint16_t demod[34];
	uint32_t fn;
	uint16_t tsc;
	uint16_t demod_lrc;
};

Signed-off-by: Steve Markgraf <steve@steve-m.de>
This commit is contained in:
Steve Markgraf 2011-11-20 15:35:20 +01:00
parent 711eec8b4f
commit 4f9dc140bb
5 changed files with 104 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/target/firmware/calypso/dsp.c
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@ -230,6 +230,14 @@ static void dsp_set_params(int16_t *param_tab, int param_size)
dsp_api.param->d_gprs_install_address = DSP_SNIFF_PATCH_START;
/* Set MCSI burst start magic, stored in unused holes.
* The sniffing task will send those over MCSI at the begin
* of each burst, in this case ASCII "IQDATAv1" */
dsp_api.param->d_hole2_param[0] = 0x4951;
dsp_api.param->d_hole2_param[1] = 0x4441;
dsp_api.param->d_hole2_param[2] = 0x5441;
dsp_api.param->d_hole2_param[3] = 0x7631;
dsp_dump_version();
dputs("Finishing download phase\n");
@ -568,6 +576,12 @@ void dsp_load_tch_param(struct gsm_time *next_time,
dsp_api.db_w->d_ctrl_tch = d_ctrl_tch; /* Channel config. */
}
void dsp_load_sniff_fn(struct gsm_time *next_time)
{
dsp_api.db_w->a_a5fn[0] = (next_time->fn >> 16);
dsp_api.db_w->a_a5fn[1] = (next_time->fn & 0xffff);
}
void dsp_load_ciph_param(int mode, uint8_t *key)
{
dsp_api.ndb->d_a5mode = mode;

61
src/target/firmware/calypso/dsp_sniffcode.c
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@ -5,7 +5,7 @@
static const struct dsp_section dsp_sniffcode[] = {
{
.addr = 0x015c,
.size = 0x00a1,
.size = 0x00be,
.data = _SA_DECL {
0x76f8, 0x3f6b, 0x0160, 0xfc00,
0x76f8, 0x439e, 0x0164, 0xfc00,
@ -17,37 +17,44 @@ static const struct dsp_section dsp_sniffcode[] = {
0x7211, 0x2114, 0xf495, 0xf495,
0x1281, 0xf845, 0x018a, 0xf010,
0x0001, 0x8081, 0xf074, 0xb74c,
0xf020, 0x01c3, 0xf074, 0xaa9f,
0xf020, 0x01c1, 0xf074, 0xaa9f,
0xf073, 0x0178, 0xfc00, 0x7681,
0x0010, 0x7581, 0x0806, 0xfc00,
0x7711, 0x2116, 0x7681, 0x0002,
0x7581, 0x0805, 0x7681, 0x004f,
0x7581, 0x0801, 0x7681, 0x0001,
0x7581, 0x0800, 0xf074, 0x018b,
0xfc00, 0x7711, 0x2116, 0xf074,
0x018b, 0x7594, 0x0820, 0x7481,
0x0806, 0x6181, 0x0010, 0xf820,
0x01a7, 0xfc00, 0x1282, 0xf074,
0x01a1, 0xf010, 0x0001, 0xf844,
0x01af, 0xfc00, 0x7711, 0x2116,
0x7481, 0x0806, 0x6181, 0x0020,
0xf820, 0x01b8, 0x7681, 0x0002,
0x7581, 0x0800, 0xfc00, 0x7714,
0x0cce, 0xf074, 0x0190, 0x7712,
0x2117, 0x7782, 0x017c, 0xf074,
0x01ae, 0xf074, 0x01b6, 0xe834,
0xf074, 0xa9ea, 0x7213, 0x2115,
0xf495, 0xf495, 0x7093, 0x3fa4,
0x7093, 0x3fa5, 0x7093, 0x3fa7,
0x7093, 0x3fa6, 0x7093, 0x0cce,
0x7712, 0x0ccf, 0x7711, 0x001c,
0x47f8, 0x0011, 0xe589, 0x7214,
0x2115, 0x7313, 0x2115, 0xf074,
0x0190, 0x7712, 0x2117, 0x7782,
0x0022, 0xf074, 0x01ae, 0xf074,
0x01b6, 0x7211, 0x2114, 0xf495,
0xf495, 0x6be1, 0x0001, 0x0001,
0xfc00,
0x7581, 0x0800, 0xfc00, 0x7711,
0x2116, 0xf074, 0x018b, 0x1d84,
0x7594, 0x0820, 0x7481, 0x0806,
0x6181, 0x0010, 0xf820, 0x01a6,
0xfc00, 0xf074, 0x019f, 0xf010,
0x0001, 0xf844, 0x01ad, 0xfc00,
0x7711, 0x2116, 0x7481, 0x0806,
0x6181, 0x0020, 0xf820, 0x01b6,
0x7681, 0x0002, 0x7581, 0x0800,
0xfc00, 0xf074, 0x0190, 0xe900,
0x7714, 0x0c39, 0xe804, 0xf074,
0x01ad, 0x7714, 0x0cce, 0xf020,
0x012e, 0xf074, 0x01ad, 0x7714,
0x2117, 0x8184, 0xf074, 0x019f,
0xf074, 0x01b4, 0xe834, 0xf074,
0xa9ea, 0x7213, 0x2115, 0xf495,
0xf495, 0x7093, 0x3fa4, 0x7093,
0x3fa5, 0x7093, 0x3fa7, 0x7093,
0x3fa6, 0x7093, 0x0cce, 0x7712,
0x0ccf, 0x7711, 0x001c, 0x47f8,
0x0011, 0xe589, 0x7214, 0x2115,
0x7313, 0x2115, 0xf074, 0x0190,
0xe900, 0xe822, 0xf074, 0x01ad,
0x7714, 0x2117, 0x7714, 0x080c,
0x61f8, 0x3fb0, 0x0001, 0xf820,
0x0203, 0x7714, 0x0820, 0xf074,
0x019f, 0xf074, 0x019f, 0x6b14,
0x0002, 0xf074, 0x019f, 0x7714,
0x2117, 0x8184, 0xf074, 0x019f,
0xf074, 0x01b4, 0x7211, 0x2114,
0xf495, 0xf495, 0x6be1, 0x0001,
0x0001, 0xfc00,
},
},
{ /* Guard */

1
src/target/firmware/include/calypso/dsp.h
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@ -32,6 +32,7 @@ void dsp_load_apc_dac(uint16_t apc);
void dsp_load_tch_param(struct gsm_time *next_time,
uint8_t chan_mode, uint8_t chan_type, uint8_t chan_sub,
uint8_t tch_loop, uint8_t sync_tch, uint8_t tn);
void dsp_load_sniff_fn(struct gsm_time *next_time);
void dsp_load_ciph_param(int mode, uint8_t *key);
void dsp_end_scenario(void);

4
src/target/firmware/layer1/prim_sniff.c
View File

@ -236,6 +236,10 @@ l1s_sniff_cmd(uint8_t ul, __unused uint8_t burst_id, __unused uint16_t p3)
rfch_get_params(&l1s.next_time, &arfcn, &tsc, &tn);
/* Load the frame number (which is dumped via MCSI and used for
* MCSI/serial synchronization */
dsp_load_sniff_fn(&l1s.next_time);
dsp_load_rx_task(SNIFF_DSP_TASK, 0, tsc);
/* enable dummy bursts detection */

67
src/target_dsp/calypso/dsp_sniff.S
View File

@ -68,7 +68,7 @@ sniff_burst_ptr .ds 1
; Variables for MCSI
mcsi_tmp .ds 1
mcsi_cnt .ds 1
mcsi_dat .ds 1
; ----------------------------------------------------------------------------
; The code itself
@ -181,8 +181,6 @@ mcsi_init:
st #1, *AR1
portw *AR1, MCSI_CONTROL_REG
call mcsi_clear_status
; Done
ret
@ -196,6 +194,9 @@ mcsi_send_word:
stm #mcsi_tmp, AR1
call mcsi_clear_status
; perform XOR LRC
xor *AR4, B
; Write TX word and increase address
portw *AR4+, MCSI_TX0_REG
@ -212,13 +213,10 @@ mcsi_send_word:
;
; MCSI send burst
;
; Sends a burst of *AR2 words, beginning at the address of AR4
; Parameters: the number of words to send at *AR2, start-address in AR4
; Sends a burst of A words, beginning at the address of AR4
; Parameters: the number of words to send in A, start-address in AR4
;
mcsi_send_burst:
; Load word-count in A
ldu *AR2, A
; Loop over all words
1:
call mcsi_send_word
@ -257,17 +255,29 @@ mcsi_disable:
; done for us. Only real work goes here.
;
burst_handler:
; Store address of I/Q data
stm #0x0CCE, AR4
; Initialize MCSI
call mcsi_init
; Send the I/Q data over MCSI
stm #mcsi_cnt, AR2
stm #380, *AR2 ; 190 samples, 380 words
; Initialize B used for XOR LRC
ld #0, B
; Send magic string, stored in ndb param section
stm #0x0C39, AR4 ; d_hole2_param[1]
ld #4, A ; 4 words
call mcsi_send_burst
; Store address of I/Q data
stm #0x0CCE, AR4
; Send the NB I/Q data over MCSI
ld #302, A ; 151 samples, 302 words
call mcsi_send_burst
; Store and send XOR LRC
stm #mcsi_dat, AR4
stl B, *AR4
call mcsi_send_word
; Disable MCSI
call mcsi_disable
@ -302,11 +312,36 @@ burst_handler:
; Initialize MCSI
call mcsi_init
; Initialize B used for XOR LRC
ld #0, B
; Send the demodulated burst data over MCSI
stm #mcsi_cnt, AR2
stm #34, *AR2 ; 5 + 29 words
ld #34, A ; 5 + 29 words
call mcsi_send_burst
stm #mcsi_dat, AR4
; Store address of a_a5fn[1] @ DSP page 0
stm #0x080C, AR4
; Check DSP page
bitf *(dsp_page), #1
bc 1f, ntc
; Store address of a_a5fn[1] @ DSP page 1
stm #0x0820, AR4
1:
; Send FN and d_ctrl_system via MCSI (contains the TSC)
call mcsi_send_word ; send a_a5fn[0]
call mcsi_send_word ; send a_a5fn[1]
addm #2, AR4 ; AR4 = 0x0810/0x0824
call mcsi_send_word ; send d_ctrl_system
; Store and send XOR LRC
stm #mcsi_dat, AR4
stl B, *AR4
call mcsi_send_word
; Disable MCSI
call mcsi_disable