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XMMBoot » History » Revision 6

Revision 5 (Denis 'GNUtoo' Carikli, 02/29/2020 12:59 AM) → Revision 6/213 (Denis 'GNUtoo' Carikli, 02/29/2020 01:58 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. 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