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Denis 'GNUtoo' Carikli, 02/29/2020 02:00 AM
XMMBoot¶
Introduction¶
For both libsamsung-ipc and the Linux driver it's interesting to understand better the boot of the modem in order to come with good names for the abstraction.
| gpio platform data name | present | absent | comments |
|---|---|---|---|
| gpio_cp_on | cp baseband processor | ||
| gpio_reset_req_n | |||
| gpio_cp_reset | cp baseband processor | ||
| gpio_pda_active | |||
| gpio_phone_active | |||
| gpio_cp_dump_int | cp == baseband processor | ||
| gpio_flm_uart_sel | Galaxy Nexus | Not used in libsamsung-ipc for other Replicant compatible devices | Modem download mode ? |
| gpio_cp_warm_reset | |||
| gpio_revers_bias_clear | |||
| gpio_revers_bias_restore | |||
| gpio_sim_detect | Detect SIM card presence ? |
SIM card presence detection¶
Do we really want to check the SIM card presence?
Would it be possible not to for privacy reasons?
Example:- Boot a modem with a SIM
- Take away the SIM card
- Go to a protest with only the SIM card and a phone with no data on it to be able to call if necessary.
TODO¶
- check gpio_flm_uart_sel in smdk4412 kernel too
Links¶
Updated by Denis 'GNUtoo' Carikli about 5 years ago · 7 revisions