#include <machine/rtems-bsd-kernel-space.h>
/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
/*-
* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <rtems/bsd/local/opt_wlan.h>
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <net/if_media.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/rtwn/if_rtwnreg.h>
#include <dev/rtwn/if_rtwnvar.h>
#include <dev/rtwn/if_rtwn_debug.h>
#include <dev/rtwn/if_rtwn_efuse.h>
#include <dev/rtwn/rtl8192c/r92c_reg.h>
static int
rtwn_efuse_switch_power(struct rtwn_softc *sc)
{
uint32_t reg;
int error;
error = rtwn_write_1(sc, R92C_EFUSE_ACCESS, R92C_EFUSE_ACCESS_ON);
if (error != 0)
return (error);
reg = rtwn_read_2(sc, R92C_SYS_FUNC_EN);
if (!(reg & R92C_SYS_FUNC_EN_ELDR)) {
error = rtwn_write_2(sc, R92C_SYS_FUNC_EN,
reg | R92C_SYS_FUNC_EN_ELDR);
if (error != 0)
return (error);
}
reg = rtwn_read_2(sc, R92C_SYS_CLKR);
if ((reg & (R92C_SYS_CLKR_LOADER_EN | R92C_SYS_CLKR_ANA8M)) !=
(R92C_SYS_CLKR_LOADER_EN | R92C_SYS_CLKR_ANA8M)) {
error = rtwn_write_2(sc, R92C_SYS_CLKR,
reg | R92C_SYS_CLKR_LOADER_EN | R92C_SYS_CLKR_ANA8M);
if (error != 0)
return (error);
}
return (0);
}
int
rtwn_efuse_read_next(struct rtwn_softc *sc, uint8_t *val)
{
uint32_t reg;
int ntries, error;
if (sc->next_rom_addr >= sc->efuse_maxlen)
return (EFAULT);
reg = rtwn_read_4(sc, R92C_EFUSE_CTRL);
reg = RW(reg, R92C_EFUSE_CTRL_ADDR, sc->next_rom_addr);
reg &= ~R92C_EFUSE_CTRL_VALID;
error = rtwn_write_4(sc, R92C_EFUSE_CTRL, reg);
if (error != 0)
return (error);
/* Wait for read operation to complete. */
for (ntries = 0; ntries < 100; ntries++) {
reg = rtwn_read_4(sc, R92C_EFUSE_CTRL);
if (reg & R92C_EFUSE_CTRL_VALID)
break;
rtwn_delay(sc, 10);
}
if (ntries == 100) {
device_printf(sc->sc_dev,
"could not read efuse byte at address 0x%x\n",
sc->next_rom_addr);
return (ETIMEDOUT);
}
*val = MS(reg, R92C_EFUSE_CTRL_DATA);
sc->next_rom_addr++;
return (0);
}
static int
rtwn_efuse_read_data(struct rtwn_softc *sc, uint8_t *rom, uint8_t off,
uint8_t msk)
{
uint8_t reg;
int addr, i, error;
for (i = 0; i < 4; i++) {
if (msk & (1 << i))
continue;
addr = off * 8 + i * 2;
if (addr + 1 >= sc->efuse_maplen)
return (EFAULT);
error = rtwn_efuse_read_next(sc, ®);
if (error != 0)
return (error);
RTWN_DPRINTF(sc, RTWN_DEBUG_ROM, "rom[0x%03X] == 0x%02X\n",
addr, reg);
rom[addr] = reg;
error = rtwn_efuse_read_next(sc, ®);
if (error != 0)
return (error);
RTWN_DPRINTF(sc, RTWN_DEBUG_ROM, "rom[0x%03X] == 0x%02X\n",
addr + 1, reg);
rom[addr + 1] = reg;
}
return (0);
}
#ifdef RTWN_DEBUG
static void
rtwn_dump_rom_contents(struct rtwn_softc *sc, uint8_t *rom, uint16_t size)
{
int i;
/* Dump ROM contents. */
device_printf(sc->sc_dev, "%s:", __func__);
for (i = 0; i < size; i++) {
if (i % 32 == 0)
printf("\n%03X: ", i);
else if (i % 4 == 0)
printf(" ");
printf("%02X", rom[i]);
}
printf("\n");
}
#endif
static int
rtwn_efuse_read(struct rtwn_softc *sc, uint8_t *rom, uint16_t size)
{
#define RTWN_CHK(res) do { \
if ((error = res) != 0) \
goto end; \
} while(0)
uint8_t msk, off, reg;
int error;
/* Read full ROM image. */
sc->next_rom_addr = 0;
memset(rom, 0xff, size);
RTWN_CHK(rtwn_efuse_read_next(sc, ®));
while (reg != 0xff) {
/* check for extended header */
if ((sc->sc_flags & RTWN_FLAG_EXT_HDR) &&
(reg & 0x1f) == 0x0f) {
off = reg >> 5;
RTWN_CHK(rtwn_efuse_read_next(sc, ®));
if ((reg & 0x0f) != 0x0f)
off = ((reg & 0xf0) >> 1) | off;
else
continue;
} else
off = reg >> 4;
msk = reg & 0xf;
RTWN_CHK(rtwn_efuse_read_data(sc, rom, off, msk));
RTWN_CHK(rtwn_efuse_read_next(sc, ®));
}
end:
#ifdef RTWN_DEBUG
if (sc->sc_debug & RTWN_DEBUG_ROM)
rtwn_dump_rom_contents(sc, rom, size);
#endif
/* Device-specific. */
rtwn_efuse_postread(sc);
if (error != 0) {
device_printf(sc->sc_dev, "%s: error while reading ROM\n",
__func__);
}
return (error);
#undef RTWN_CHK
}
static int
rtwn_efuse_read_prepare(struct rtwn_softc *sc, uint8_t *rom, uint16_t size)
{
int error;
error = rtwn_efuse_switch_power(sc);
if (error != 0)
goto fail;
error = rtwn_efuse_read(sc, rom, size);
fail:
rtwn_write_1(sc, R92C_EFUSE_ACCESS, R92C_EFUSE_ACCESS_OFF);
return (error);
}
int
rtwn_read_rom(struct rtwn_softc *sc)
{
uint8_t *rom;
int error;
rom = malloc(sc->efuse_maplen, M_TEMP, M_WAITOK);
/* Read full ROM image. */
RTWN_LOCK(sc);
error = rtwn_efuse_read_prepare(sc, rom, sc->efuse_maplen);
RTWN_UNLOCK(sc);
if (error != 0)
goto fail;
/* Parse & save data in softc. */
rtwn_parse_rom(sc, rom);
fail:
free(rom, M_TEMP);
return (error);
}
