361 lines
10 KiB
C
361 lines
10 KiB
C
/* $NetBSD: rtwphyio.c,v 1.19 2016/10/09 14:42:30 christos Exp $ */
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/*-
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* Copyright (c) 2004, 2005 David Young. All rights reserved.
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*
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* Programmed for NetBSD by David Young.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David
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* Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*/
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/*
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* Control input/output with the Philips SA2400 RF front-end and
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* the baseband processor built into the Realtek RTL8180.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rtwphyio.c,v 1.19 2016/10/09 14:42:30 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_ether.h>
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#include <net80211/ieee80211_netbsd.h>
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#include <net80211/ieee80211_radiotap.h>
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#include <net80211/ieee80211_var.h>
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#include <dev/ic/rtwreg.h>
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#include <dev/ic/max2820reg.h>
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#include <dev/ic/sa2400reg.h>
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#include <dev/ic/si4136reg.h>
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#include <dev/ic/rtwvar.h>
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#include <dev/ic/rtwphyio.h>
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#include <dev/ic/rtwphy.h>
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static int rtw_macbangbits_timeout = 100;
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uint8_t
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rtw_bbp_read(struct rtw_regs *regs, u_int addr)
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{
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KASSERT((addr & ~__SHIFTOUT_MASK(RTW_BB_ADDR_MASK)) == 0);
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RTW_WRITE(regs, RTW_BB,
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__SHIFTIN(addr, RTW_BB_ADDR_MASK) | RTW_BB_RD_MASK | RTW_BB_WR_MASK);
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delay(10); /* XXX */
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RTW_WBR(regs, RTW_BB, RTW_BB);
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return __SHIFTOUT(RTW_READ(regs, RTW_BB), RTW_BB_RD_MASK);
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}
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int
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rtw_bbp_write(struct rtw_regs *regs, u_int addr, u_int val)
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{
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#define BBP_WRITE_ITERS 50
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#define BBP_WRITE_DELAY 1
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int i;
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uint32_t wrbbp, rdbbp;
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RTW_DPRINTF(RTW_DEBUG_PHYIO,
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("%s: bbp[%u] <- %u\n", __func__, addr, val));
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KASSERT((addr & ~__SHIFTOUT_MASK(RTW_BB_ADDR_MASK)) == 0);
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KASSERT((val & ~__SHIFTOUT_MASK(RTW_BB_WR_MASK)) == 0);
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wrbbp = __SHIFTIN(addr, RTW_BB_ADDR_MASK) | RTW_BB_WREN |
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__SHIFTIN(val, RTW_BB_WR_MASK) | RTW_BB_RD_MASK;
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rdbbp = __SHIFTIN(addr, RTW_BB_ADDR_MASK) |
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RTW_BB_WR_MASK | RTW_BB_RD_MASK;
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RTW_DPRINTF(RTW_DEBUG_PHYIO,
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("%s: rdbbp = %#08x, wrbbp = %#08x\n", __func__, rdbbp, wrbbp));
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for (i = BBP_WRITE_ITERS; --i >= 0; ) {
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RTW_RBW(regs, RTW_BB, RTW_BB);
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RTW_WRITE(regs, RTW_BB, wrbbp);
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RTW_SYNC(regs, RTW_BB, RTW_BB);
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RTW_WRITE(regs, RTW_BB, rdbbp);
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RTW_SYNC(regs, RTW_BB, RTW_BB);
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delay(BBP_WRITE_DELAY); /* 1 microsecond */
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if (__SHIFTOUT(RTW_READ(regs, RTW_BB),
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RTW_BB_RD_MASK) == val) {
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RTW_DPRINTF(RTW_DEBUG_PHYIO,
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("%s: finished in %dus\n", __func__,
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BBP_WRITE_DELAY * (BBP_WRITE_ITERS - i)));
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return 0;
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}
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delay(BBP_WRITE_DELAY); /* again */
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}
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printf("%s: timeout\n", __func__);
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return -1;
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}
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/* Help rtw_rf_hostwrite bang bits to RF over 3-wire interface. */
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static inline void
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rtw_rf_hostbangbits(struct rtw_regs *regs, uint32_t bits, int lo_to_hi,
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u_int nbits)
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{
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int i;
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uint32_t mask, reg;
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KASSERT(nbits <= 32);
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RTW_DPRINTF(RTW_DEBUG_PHYIO,
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("%s: %u bits, %#08x, %s\n", __func__, nbits, bits,
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(lo_to_hi) ? "lo to hi" : "hi to lo"));
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reg = RTW_PHYCFG_HST;
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RTW_WRITE(regs, RTW_PHYCFG, reg);
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RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG);
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if (lo_to_hi)
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mask = 0x1;
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else
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mask = 1 << (nbits - 1);
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for (i = 0; i < nbits; i++) {
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RTW_DPRINTF(RTW_DEBUG_PHYBITIO,
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("%s: bits %#08x mask %#08x -> bit %#08x\n",
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__func__, bits, mask, bits & mask));
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if ((bits & mask) != 0)
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reg |= RTW_PHYCFG_HST_DATA;
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else
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reg &= ~RTW_PHYCFG_HST_DATA;
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reg |= RTW_PHYCFG_HST_CLK;
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RTW_WRITE(regs, RTW_PHYCFG, reg);
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RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG);
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DELAY(2); /* arbitrary delay */
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reg &= ~RTW_PHYCFG_HST_CLK;
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RTW_WRITE(regs, RTW_PHYCFG, reg);
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RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG);
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if (lo_to_hi)
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mask <<= 1;
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else
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mask >>= 1;
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}
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reg |= RTW_PHYCFG_HST_EN;
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KASSERT((reg & RTW_PHYCFG_HST_CLK) == 0);
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RTW_WRITE(regs, RTW_PHYCFG, reg);
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RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG);
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}
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/* Help rtw_rf_macwrite: tell MAC to bang bits to RF over the 3-wire
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* interface.
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*/
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static inline int
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rtw_rf_macbangbits(struct rtw_regs *regs, uint32_t reg)
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{
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int i;
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RTW_DPRINTF(RTW_DEBUG_PHY, ("%s: %#08x\n", __func__, reg));
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RTW_WRITE(regs, RTW_PHYCFG, RTW_PHYCFG_MAC_POLL | reg);
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RTW_WBR(regs, RTW_PHYCFG, RTW_PHYCFG);
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for (i = rtw_macbangbits_timeout; --i >= 0; delay(1)) {
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if ((RTW_READ(regs, RTW_PHYCFG) & RTW_PHYCFG_MAC_POLL) == 0) {
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RTW_DPRINTF(RTW_DEBUG_PHY,
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("%s: finished in %dus\n", __func__,
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rtw_macbangbits_timeout - i));
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return 0;
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}
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RTW_RBR(regs, RTW_PHYCFG, RTW_PHYCFG); /* XXX paranoia? */
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}
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printf("%s: RTW_PHYCFG_MAC_POLL still set.\n", __func__);
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return -1;
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}
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static uint32_t
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rtw_grf5101_host_crypt(u_int addr, uint32_t val)
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{
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/* TBD */
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return 0;
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}
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static uint32_t
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rtw_grf5101_mac_crypt(u_int addr, uint32_t val)
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{
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uint32_t data_and_addr;
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#define EXTRACT_NIBBLE(d, which) (((d) >> (4 * (which))) & 0xf)
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static uint8_t caesar[16] = {0x0, 0x8, 0x4, 0xc,
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0x2, 0xa, 0x6, 0xe,
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0x1, 0x9, 0x5, 0xd,
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0x3, 0xb, 0x7, 0xf};
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data_and_addr = caesar[EXTRACT_NIBBLE(val, 2)] |
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(caesar[EXTRACT_NIBBLE(val, 1)] << 4) |
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(caesar[EXTRACT_NIBBLE(val, 0)] << 8) |
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(caesar[(addr >> 1) & 0xf] << 12) |
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((addr & 0x1) << 16) |
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(caesar[EXTRACT_NIBBLE(val, 3)] << 24);
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return __SHIFTIN(data_and_addr,
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RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK|RTW_PHYCFG_MAC_PHILIPS_DATA_MASK);
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#undef EXTRACT_NIBBLE
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}
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#ifdef RTW_DEBUG
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static inline const char *
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rtw_rfchipid_string(enum rtw_rfchipid rfchipid)
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{
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switch (rfchipid) {
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case RTW_RFCHIPID_MAXIM:
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return "Maxim";
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case RTW_RFCHIPID_PHILIPS:
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return "Philips";
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case RTW_RFCHIPID_GCT:
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return "GCT";
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case RTW_RFCHIPID_RFMD:
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return "RFMD";
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case RTW_RFCHIPID_INTERSIL:
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return "Intersil";
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default:
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return "unknown";
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}
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}
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#endif
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/* Bang bits over the 3-wire interface. */
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int
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rtw_rf_hostwrite(struct rtw_regs *regs, enum rtw_rfchipid rfchipid,
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u_int addr, uint32_t val)
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{
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u_int nbits;
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int lo_to_hi;
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uint32_t bits;
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RTW_DPRINTF(RTW_DEBUG_PHYIO, ("%s: %s[%u] <- %#08x\n", __func__,
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rtw_rfchipid_string(rfchipid), addr, val));
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switch (rfchipid) {
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case RTW_RFCHIPID_MAXIM:
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nbits = 16;
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lo_to_hi = 0;
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bits = __SHIFTIN(val, MAX2820_TWI_DATA_MASK) |
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__SHIFTIN(addr, MAX2820_TWI_ADDR_MASK);
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break;
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case RTW_RFCHIPID_PHILIPS:
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KASSERT((addr & ~__SHIFTOUT_MASK(SA2400_TWI_ADDR_MASK)) == 0);
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KASSERT((val & ~__SHIFTOUT_MASK(SA2400_TWI_DATA_MASK)) == 0);
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bits = __SHIFTIN(val, SA2400_TWI_DATA_MASK) |
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__SHIFTIN(addr, SA2400_TWI_ADDR_MASK) | SA2400_TWI_WREN;
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nbits = 32;
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lo_to_hi = 1;
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break;
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case RTW_RFCHIPID_GCT:
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KASSERT((addr & ~__SHIFTOUT_MASK(SI4126_TWI_ADDR_MASK)) == 0);
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KASSERT((val & ~__SHIFTOUT_MASK(SI4126_TWI_DATA_MASK)) == 0);
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bits = rtw_grf5101_host_crypt(addr, val);
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nbits = 21;
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lo_to_hi = 1;
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break;
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case RTW_RFCHIPID_RFMD:
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KASSERT((addr & ~__SHIFTOUT_MASK(SI4126_TWI_ADDR_MASK)) == 0);
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KASSERT((val & ~__SHIFTOUT_MASK(SI4126_TWI_DATA_MASK)) == 0);
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bits = __SHIFTIN(val, SI4126_TWI_DATA_MASK) |
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__SHIFTIN(addr, SI4126_TWI_ADDR_MASK);
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nbits = 22;
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lo_to_hi = 0;
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break;
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case RTW_RFCHIPID_INTERSIL:
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default:
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printf("%s: unknown rfchipid %d\n", __func__, rfchipid);
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return -1;
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}
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rtw_rf_hostbangbits(regs, bits, lo_to_hi, nbits);
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return 0;
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}
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static uint32_t
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rtw_maxim_swizzle(u_int addr, uint32_t val)
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{
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uint32_t hidata, lodata;
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KASSERT((val & ~(RTW_MAXIM_LODATA_MASK|RTW_MAXIM_HIDATA_MASK)) == 0);
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lodata = __SHIFTOUT(val, RTW_MAXIM_LODATA_MASK);
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hidata = __SHIFTOUT(val, RTW_MAXIM_HIDATA_MASK);
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return __SHIFTIN(lodata, RTW_PHYCFG_MAC_MAXIM_LODATA_MASK) |
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__SHIFTIN(hidata, RTW_PHYCFG_MAC_MAXIM_HIDATA_MASK) |
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__SHIFTIN(addr, RTW_PHYCFG_MAC_MAXIM_ADDR_MASK);
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}
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/* Tell the MAC what to bang over the 3-wire interface. */
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int
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rtw_rf_macwrite(struct rtw_regs *regs, enum rtw_rfchipid rfchipid,
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u_int addr, uint32_t val)
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{
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uint32_t reg;
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RTW_DPRINTF(RTW_DEBUG_PHYIO, ("%s: %s[%u] <- %#08x\n", __func__,
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rtw_rfchipid_string(rfchipid), addr, val));
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switch (rfchipid) {
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case RTW_RFCHIPID_GCT:
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reg = rtw_grf5101_mac_crypt(addr, val);
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break;
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case RTW_RFCHIPID_MAXIM:
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reg = rtw_maxim_swizzle(addr, val);
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break;
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default: /* XXX */
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case RTW_RFCHIPID_PHILIPS:
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KASSERT(
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(addr & ~__SHIFTOUT_MASK(RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK)) == 0);
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KASSERT(
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(val & ~__SHIFTOUT_MASK(RTW_PHYCFG_MAC_PHILIPS_DATA_MASK)) == 0);
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reg = __SHIFTIN(addr, RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK) |
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__SHIFTIN(val, RTW_PHYCFG_MAC_PHILIPS_DATA_MASK);
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}
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switch (rfchipid) {
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case RTW_RFCHIPID_GCT:
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case RTW_RFCHIPID_MAXIM:
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case RTW_RFCHIPID_RFMD:
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reg |= RTW_PHYCFG_MAC_RFTYPE_RFMD;
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break;
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case RTW_RFCHIPID_INTERSIL:
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reg |= RTW_PHYCFG_MAC_RFTYPE_INTERSIL;
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break;
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case RTW_RFCHIPID_PHILIPS:
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reg |= RTW_PHYCFG_MAC_RFTYPE_PHILIPS;
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break;
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default:
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printf("%s: unknown rfchipid %d\n", __func__, rfchipid);
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return -1;
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}
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return rtw_rf_macbangbits(regs, reg);
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}
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