XMMBoot » History » Revision 7
Revision 6 (Denis 'GNUtoo' Carikli, 02/29/2020 01:58 AM) → Revision 7/213 (Denis 'GNUtoo' Carikli, 02/29/2020 02:00 AM)
h1. XMMBoot h2. 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 ? | h2. 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. h2. TODO * check gpio_flm_uart_sel in smdk4412 kernel too h2. Links * https://git.replicant.us/replicant/kernel_samsung_smdk4412/tree/drivers/misc/modem_if/modem_modemctl_device_xmm6260.c * https://forum.xda-developers.com/galaxy-s2/help/how-to-talk-to-modem-commands-t1471241/page4