drivers/net/wireless/b43/phy_lp.c

/*

  Broadcom B43 wireless driver
  IEEE 802.11g LP-PHY driver

  Copyright (c) 2008-2009 Michael Buesch <mb@bu3sch.de>

  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; see the file COPYING.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  Boston, MA 02110-1301, USA.

*/

#include "b43.h"
#include "phy_lp.h"
#include "phy_common.h"
#include "tables_lpphy.h"


static int b43_lpphy_op_allocate(struct b43_wldev *dev)
{
	struct b43_phy_lp *lpphy;

	lpphy = kzalloc(sizeof(*lpphy), GFP_KERNEL);
	if (!lpphy)
		return -ENOMEM;
	dev->phy.lp = lpphy;

	return 0;
}

static void b43_lpphy_op_prepare_structs(struct b43_wldev *dev)
{
	struct b43_phy *phy = &dev->phy;
	struct b43_phy_lp *lpphy = phy->lp;

	memset(lpphy, 0, sizeof(*lpphy));

	//TODO
}

static void b43_lpphy_op_free(struct b43_wldev *dev)
{
	struct b43_phy_lp *lpphy = dev->phy.lp;

	kfree(lpphy);
	dev->phy.lp = NULL;
}

static void lpphy_table_init(struct b43_wldev *dev)
{
	//TODO
}

static void lpphy_baseband_rev0_1_init(struct b43_wldev *dev)
{
	B43_WARN_ON(1);//TODO rev < 2 not supported, yet.
}

static void lpphy_baseband_rev2plus_init(struct b43_wldev *dev)
{
	struct ssb_bus *bus = dev->dev->bus;
	struct b43_phy_lp *lpphy = dev->phy.lp;

	b43_phy_write(dev, B43_LPPHY_AFE_DAC_CTL, 0x50);
	b43_phy_write(dev, B43_LPPHY_AFE_CTL, 0x8800);
	b43_phy_write(dev, B43_LPPHY_AFE_CTL_OVR, 0);
	b43_phy_write(dev, B43_LPPHY_AFE_CTL_OVRVAL, 0);
	b43_phy_write(dev, B43_LPPHY_RF_OVERRIDE_0, 0);
	b43_phy_write(dev, B43_LPPHY_RF_OVERRIDE_2, 0);
	b43_phy_write(dev, B43_PHY_OFDM(0xF9), 0);
	b43_phy_write(dev, B43_LPPHY_TR_LOOKUP_1, 0);
	b43_phy_set(dev, B43_LPPHY_ADC_COMPENSATION_CTL, 0x10);
	b43_phy_maskset(dev, B43_LPPHY_OFDMSYNCTHRESH0, 0xFF00, 0x78);
	b43_phy_maskset(dev, B43_LPPHY_DCOFFSETTRANSIENT, 0xF8FF, 0x200);
	b43_phy_maskset(dev, B43_LPPHY_DCOFFSETTRANSIENT, 0xFF00, 0x7F);
	b43_phy_maskset(dev, B43_LPPHY_GAINDIRECTMISMATCH, 0xFF0F, 0x40);
	b43_phy_maskset(dev, B43_LPPHY_PREAMBLECONFIRMTO, 0xFF00, 0x2);
	b43_phy_mask(dev, B43_LPPHY_CRSGAIN_CTL, ~0x4000);
	b43_phy_mask(dev, B43_LPPHY_CRSGAIN_CTL, ~0x2000);
	b43_phy_set(dev, B43_PHY_OFDM(0x10A), 0x1);
	b43_phy_maskset(dev, B43_PHY_OFDM(0x10A), 0xFF01, 0x10);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xDF), 0xFF00, 0xF4);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xDF), 0x00FF, 0xF100);
	b43_phy_write(dev, B43_LPPHY_CLIPTHRESH, 0x48);
	b43_phy_maskset(dev, B43_LPPHY_HIGAINDB, 0xFF00, 0x46);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xE4), 0xFF00, 0x10);
	b43_phy_maskset(dev, B43_LPPHY_PWR_THRESH1, 0xFFF0, 0x9);
	b43_phy_mask(dev, B43_LPPHY_GAINDIRECTMISMATCH, ~0xF);
	b43_phy_maskset(dev, B43_LPPHY_VERYLOWGAINDB, 0x00FF, 0x5500);
	b43_phy_maskset(dev, B43_LPPHY_CLIPCTRTHRESH, 0xF81F, 0xA0);
	b43_phy_maskset(dev, B43_LPPHY_GAINDIRECTMISMATCH, 0xE0FF, 0x300);
	b43_phy_maskset(dev, B43_LPPHY_HIGAINDB, 0x00FF, 0x2A00);
	if ((bus->chip_id == 0x4325) && (bus->chip_rev == 0)) {
		b43_phy_maskset(dev, B43_LPPHY_LOWGAINDB, 0x00FF, 0x2100);
		b43_phy_maskset(dev, B43_LPPHY_VERYLOWGAINDB, 0xFF00, 0xA);
	} else {
		b43_phy_maskset(dev, B43_LPPHY_LOWGAINDB, 0x00FF, 0x1E00);
		b43_phy_maskset(dev, B43_LPPHY_VERYLOWGAINDB, 0xFF00, 0xD);
	}
	b43_phy_maskset(dev, B43_PHY_OFDM(0xFE), 0xFFE0, 0x1F);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xFF), 0xFFE0, 0xC);
	b43_phy_maskset(dev, B43_PHY_OFDM(0x100), 0xFF00, 0x19);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xFF), 0x03FF, 0x3C00);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xFE), 0xFC1F, 0x3E0);
	b43_phy_maskset(dev, B43_PHY_OFDM(0xFF), 0xFFE0, 0xC);
	b43_phy_maskset(dev, B43_PHY_OFDM(0x100), 0x00FF, 0x1900);
	b43_phy_maskset(dev, B43_LPPHY_CLIPCTRTHRESH, 0x83FF, 0x5800);
	b43_phy_maskset(dev, B43_LPPHY_CLIPCTRTHRESH, 0xFFE0, 0x12);
	b43_phy_maskset(dev, B43_LPPHY_GAINMISMATCH, 0x0FFF, 0x9000);

	b43_lptab_write(dev, B43_LPTAB16(0x08, 0x14), 0);
	b43_lptab_write(dev, B43_LPTAB16(0x08, 0x12), 0x40);

	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ) {
		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x40);
		b43_phy_maskset(dev, B43_LPPHY_CRSGAIN_CTL, 0xF0FF, 0xB00);
		b43_phy_maskset(dev, B43_LPPHY_SYNCPEAKCNT, 0xFFF8, 0x6);
		b43_phy_maskset(dev, B43_LPPHY_MINPWR_LEVEL, 0x00FF, 0x9D00);
		b43_phy_maskset(dev, B43_LPPHY_MINPWR_LEVEL, 0xFF00, 0xA1);
	} else /* 5GHz */
		b43_phy_mask(dev, B43_LPPHY_CRSGAIN_CTL, ~0x40);

	b43_phy_maskset(dev, B43_LPPHY_CRS_ED_THRESH, 0xFF00, 0xB3);
	b43_phy_maskset(dev, B43_LPPHY_CRS_ED_THRESH, 0x00FF, 0xAD00);
	b43_phy_maskset(dev, B43_LPPHY_INPUT_PWRDB, 0xFF00, lpphy->rx_pwr_offset);
	b43_phy_set(dev, B43_LPPHY_RESET_CTL, 0x44);
	b43_phy_write(dev, B43_LPPHY_RESET_CTL, 0x80);
	b43_phy_write(dev, B43_LPPHY_AFE_RSSI_CTL_0, 0xA954);
	b43_phy_write(dev, B43_LPPHY_AFE_RSSI_CTL_1,
		      0x2000 | ((u16)lpphy->rssi_gs << 10) |
		      ((u16)lpphy->rssi_vc << 4) | lpphy->rssi_vf);
}

static void lpphy_baseband_init(struct b43_wldev *dev)
{
	lpphy_table_init(dev);
	if (dev->phy.rev >= 2)
		lpphy_baseband_rev2plus_init(dev);
	else
		lpphy_baseband_rev0_1_init(dev);
}

struct b2062_freqdata {
	u16 freq;
	u8 data[6];
};

/* Initialize the 2062 radio. */
static void lpphy_2062_init(struct b43_wldev *dev)
{
	struct ssb_bus *bus = dev->dev->bus;
	u32 crystalfreq, pdiv, tmp, ref;
	unsigned int i;
	const struct b2062_freqdata *fd = NULL;

	static const struct b2062_freqdata freqdata_tab[] = {
		{ .freq = 12000, .data[0] =  6, .data[1] =  6, .data[2] =  6,
				 .data[3] =  6, .data[4] = 10, .data[5] =  6, },
		{ .freq = 13000, .data[0] =  4, .data[1] =  4, .data[2] =  4,
				 .data[3] =  4, .data[4] = 11, .data[5] =  7, },
		{ .freq = 14400, .data[0] =  3, .data[1] =  3, .data[2] =  3,
				 .data[3] =  3, .data[4] = 12, .data[5] =  7, },
		{ .freq = 16200, .data[0] =  3, .data[1] =  3, .data[2] =  3,
				 .data[3] =  3, .data[4] = 13, .data[5] =  8, },
		{ .freq = 18000, .data[0] =  2, .data[1] =  2, .data[2] =  2,
				 .data[3] =  2, .data[4] = 14, .data[5] =  8, },
		{ .freq = 19200, .data[0] =  1, .data[1] =  1, .data[2] =  1,
				 .data[3] =  1, .data[4] = 14, .data[5] =  9, },
	};

	b2062_upload_init_table(dev);

	b43_radio_write(dev, B2062_N_TX_CTL3, 0);
	b43_radio_write(dev, B2062_N_TX_CTL4, 0);
	b43_radio_write(dev, B2062_N_TX_CTL5, 0);
	b43_radio_write(dev, B2062_N_PDN_CTL0, 0x40);
	b43_radio_write(dev, B2062_N_PDN_CTL0, 0);
	b43_radio_write(dev, B2062_N_CALIB_TS, 0x10);
	b43_radio_write(dev, B2062_N_CALIB_TS, 0);
	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
		b43_radio_set(dev, B2062_N_TSSI_CTL0, 0x1);
	else
		b43_radio_mask(dev, B2062_N_TSSI_CTL0, ~0x1);

	/* Get the crystal freq, in Hz. */
	crystalfreq = bus->chipco.pmu.crystalfreq * 1000;

	B43_WARN_ON(!(bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU));
	B43_WARN_ON(crystalfreq == 0);

	if (crystalfreq >= 30000000) {
		pdiv = 1;
		b43_radio_mask(dev, B2062_S_RFPLL_CTL1, 0xFFFB);
	} else {
		pdiv = 2;
		b43_radio_set(dev, B2062_S_RFPLL_CTL1, 0x4);
	}

	tmp = (800000000 * pdiv + crystalfreq) / (32000000 * pdiv);
	tmp = (tmp - 1) & 0xFF;
	b43_radio_write(dev, B2062_S_RFPLL_CTL18, tmp);

	tmp = (2 * crystalfreq + 1000000 * pdiv) / (2000000 * pdiv);
	tmp = ((tmp & 0xFF) - 1) & 0xFFFF;
	b43_radio_write(dev, B2062_S_RFPLL_CTL19, tmp);

	ref = (1000 * pdiv + 2 * crystalfreq) / (2000 * pdiv);
	ref &= 0xFFFF;
	for (i = 0; i < ARRAY_SIZE(freqdata_tab); i++) {
		if (ref < freqdata_tab[i].freq) {
			fd = &freqdata_tab[i];
			break;
		}
	}
	if (!fd)
		fd = &freqdata_tab[ARRAY_SIZE(freqdata_tab) - 1];
	b43dbg(dev->wl, "b2062: Using crystal tab entry %u kHz.\n",
	       fd->freq); /* FIXME: Keep this printk until the code is fully debugged. */

	b43_radio_write(dev, B2062_S_RFPLL_CTL8,
			((u16)(fd->data[1]) << 4) | fd->data[0]);
	b43_radio_write(dev, B2062_S_RFPLL_CTL9,
			((u16)(fd->data[3]) << 4) | fd->data[2]);
	b43_radio_write(dev, B2062_S_RFPLL_CTL10, fd->data[4]);
	b43_radio_write(dev, B2062_S_RFPLL_CTL11, fd->data[5]);
}

/* Initialize the 2063 radio. */
static void lpphy_2063_init(struct b43_wldev *dev)
{
	//TODO
}

static void lpphy_sync_stx(struct b43_wldev *dev)
{
	//TODO
}

static void lpphy_radio_init(struct b43_wldev *dev)
{
	/* The radio is attached through the 4wire bus. */
	b43_phy_set(dev, B43_LPPHY_FOURWIRE_CTL, 0x2);
	udelay(1);
	b43_phy_mask(dev, B43_LPPHY_FOURWIRE_CTL, 0xFFFD);
	udelay(1);

	if (dev->phy.rev < 2) {
		lpphy_2062_init(dev);
	} else {
		lpphy_2063_init(dev);
		lpphy_sync_stx(dev);
		b43_phy_write(dev, B43_PHY_OFDM(0xF0), 0x5F80);
		b43_phy_write(dev, B43_PHY_OFDM(0xF1), 0);
		//TODO Do something on the backplane
	}
}

static int b43_lpphy_op_init(struct b43_wldev *dev)
{
	/* TODO: band SPROM */
	lpphy_baseband_init(dev);
	lpphy_radio_init(dev);

	//TODO

	return 0;
}

static u16 b43_lpphy_op_read(struct b43_wldev *dev, u16 reg)
{
	b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
	return b43_read16(dev, B43_MMIO_PHY_DATA);
}

static void b43_lpphy_op_write(struct b43_wldev *dev, u16 reg, u16 value)
{
	b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
	b43_write16(dev, B43_MMIO_PHY_DATA, value);
}

static u16 b43_lpphy_op_radio_read(struct b43_wldev *dev, u16 reg)
{
	/* Register 1 is a 32-bit register. */
	B43_WARN_ON(reg == 1);
	/* LP-PHY needs a special bit set for read access */
	if (dev->phy.rev < 2) {
		if (reg != 0x4001)
			reg |= 0x100;
	} else
		reg |= 0x200;

	b43_write16(dev, B43_MMIO_RADIO_CONTROL, reg);
	return b43_read16(dev, B43_MMIO_RADIO_DATA_LOW);
}

static void b43_lpphy_op_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
{
	/* Register 1 is a 32-bit register. */
	B43_WARN_ON(reg == 1);

	b43_write16(dev, B43_MMIO_RADIO_CONTROL, reg);
	b43_write16(dev, B43_MMIO_RADIO_DATA_LOW, value);
}

static void b43_lpphy_op_software_rfkill(struct b43_wldev *dev,
					 enum rfkill_state state)
{
	//TODO
}

static int b43_lpphy_op_switch_channel(struct b43_wldev *dev,
				       unsigned int new_channel)
{
	//TODO
	return 0;
}

static unsigned int b43_lpphy_op_get_default_chan(struct b43_wldev *dev)
{
	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
		return 1;
	return 36;
}

static void b43_lpphy_op_set_rx_antenna(struct b43_wldev *dev, int antenna)
{
	//TODO
}

static void b43_lpphy_op_adjust_txpower(struct b43_wldev *dev)
{
	//TODO
}

static enum b43_txpwr_result b43_lpphy_op_recalc_txpower(struct b43_wldev *dev,
							 bool ignore_tssi)
{
	//TODO
	return B43_TXPWR_RES_DONE;
}


const struct b43_phy_operations b43_phyops_lp = {
	.allocate		= b43_lpphy_op_allocate,
	.free			= b43_lpphy_op_free,
	.prepare_structs	= b43_lpphy_op_prepare_structs,
	.init			= b43_lpphy_op_init,
	.phy_read		= b43_lpphy_op_read,
	.phy_write		= b43_lpphy_op_write,
	.radio_read		= b43_lpphy_op_radio_read,
	.radio_write		= b43_lpphy_op_radio_write,
	.software_rfkill	= b43_lpphy_op_software_rfkill,
	.switch_analog		= b43_phyop_switch_analog_generic,
	.switch_channel		= b43_lpphy_op_switch_channel,
	.get_default_chan	= b43_lpphy_op_get_default_chan,
	.set_rx_antenna		= b43_lpphy_op_set_rx_antenna,
	.recalc_txpower		= b43_lpphy_op_recalc_txpower,
	.adjust_txpower		= b43_lpphy_op_adjust_txpower,
};