FreeCalypso > hg > freecalypso-tools
view target-utils/libbase/abbdrv.c @ 921:74d284add54d
fc-fsio: guard against bogus readdir results from the target
If the FFS being operated on contains SE K2x0 extended filenames,
readdir will return strings that are bad for printing. We need to
guard against this possibility, and also against possible other
bogosity that could be sent by other alien firmwares.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 31 Dec 2022 22:55:23 +0000 |
parents | a04a145098f1 |
children |
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/* Driver for Analog Baseband Circuit (TWL3025) */ /* lifted from OsmocomBB and ported to FreeCalypso target-utils environment */ /* (C) 2010 by Harald Welte <laforge@gnumonks.org> * * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ #include "types.h" #include "abbdefs.h" /* TWL3025, modified for page 2 support */ #define REG_PAGE(n) ((n) >> 6) #define REG_ADDR(n) ((n) & 0x1f) #define TWL3025_DEV_IDX 0 /* On the SPI bus */ #define TWL3025_TSP_DEV_IDX 0 /* On the TSP bus */ int abb_state_initdone, abb_state_page; void abb_reg_write(reg, data) { u16 tx; if (reg != PAGEREG && REG_PAGE(reg) != abb_state_page) abb_select_page(REG_PAGE(reg)); tx = ((data & 0x3ff) << 6) | (REG_ADDR(reg) << 1); spi_xfer(TWL3025_DEV_IDX, 16, &tx, 0); } u16 abb_reg_read(reg) { u16 tx, rx; if (REG_PAGE(reg) != abb_state_page) abb_select_page(REG_PAGE(reg)); tx = (REG_ADDR(reg) << 1) | 1; /* A read cycle contains two SPI transfers */ spi_xfer(TWL3025_DEV_IDX, 16, &tx, &rx); /* delay of seven 13MHz cycles */ wait_ARM_cycles(7); spi_xfer(TWL3025_DEV_IDX, 16, &tx, &rx); rx >>= 6; return rx; } /* Switch the register page of the TWL3025 */ abb_select_page(page) { switch (page) { case 0: abb_reg_write(PAGEREG, 1 << 0); break; case 1: abb_reg_write(PAGEREG, 1 << 1); break; case 2: /* not documented in datasheet, learned from TCS211 code */ abb_reg_write(PAGEREG, 1 << 4); break; } abb_state_page = page; return(0); } abb_init() { if (abb_state_initdone) return(0); spi_init(); abb_select_page(0); /* CLK13M enable */ abb_reg_write(TOGBR2, TOGBR2_ACTS); /* ABB_Wait_IBIC_Access() delay of 210 us */ wait_ARM_cycles(210 * 13); /* for whatever reason we need to do this twice */ abb_reg_write(TOGBR2, TOGBR2_ACTS); /* ABB_Wait_IBIC_Access() delay of 210 us */ wait_ARM_cycles(210 * 13); abb_state_initdone = 1; return(1); } void abb_unlock_page2() { abb_reg_write(TAPCTRL, 0x01); abb_reg_write(TAPREG, 0x1B); } void abb_power_off() { abb_init(); /* * If we booted via nTESTRESET, we need to clean up some state * in a secret undocumented Iota register before we do the DEVOFF, * otherwise subsequent switch-on via regular PWON button * won't work correctly. */ abb_unlock_page2(); abb_reg_write(VRPCAUX, 0x07); serial_flush(); abb_reg_write(VRPCDEV, 0x01); /* DEVOFF */ /* * TWL3025 datasheet seems to indicate that the time for the DEVOFF * command to take effect is 5 cycles of the 32.768 kHz clock. * We'll do an ARM-timed delay of 10 ms before returning from * this function. */ wait_ARM_cycles(13000 * 10); }