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/* ZD1211 USB-WLAN driver for Linux
 *
 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/kernel.h>

#include "zd_rf.h"
#include "zd_usb.h"
#include "zd_chip.h"

static const u32 rf2959_table[][2] = {
	RF_CHANNEL( 1) = { 0x181979, 0x1e6666 },
	RF_CHANNEL( 2) = { 0x181989, 0x1e6666 },
	RF_CHANNEL( 3) = { 0x181999, 0x1e6666 },
	RF_CHANNEL( 4) = { 0x1819a9, 0x1e6666 },
	RF_CHANNEL( 5) = { 0x1819b9, 0x1e6666 },
	RF_CHANNEL( 6) = { 0x1819c9, 0x1e6666 },
	RF_CHANNEL( 7) = { 0x1819d9, 0x1e6666 },
	RF_CHANNEL( 8) = { 0x1819e9, 0x1e6666 },
	RF_CHANNEL( 9) = { 0x1819f9, 0x1e6666 },
	RF_CHANNEL(10) = { 0x181a09, 0x1e6666 },
	RF_CHANNEL(11) = { 0x181a19, 0x1e6666 },
	RF_CHANNEL(12) = { 0x181a29, 0x1e6666 },
	RF_CHANNEL(13) = { 0x181a39, 0x1e6666 },
	RF_CHANNEL(14) = { 0x181a60, 0x1c0000 },
};

#if 0
static int bits(u32 rw, int from, int to)
{
	rw &= ~(0xffffffffU << (to+1));
	rw >>= from;
	return rw;
}

static int bit(u32 rw, int bit)
{
	return bits(rw, bit, bit);
}

static void dump_regwrite(u32 rw)
{
	int reg = bits(rw, 18, 22);
	int rw_flag = bits(rw, 23, 23);
	PDEBUG("rf2959 %#010x reg %d rw %d", rw, reg, rw_flag);

	switch (reg) {
	case 0:
		PDEBUG("reg0 CFG1 ref_sel %d hibernate %d rf_vco_reg_en %d"
		       " if_vco_reg_en %d if_vga_en %d",
		       bits(rw, 14, 15), bit(rw, 3), bit(rw, 2), bit(rw, 1),
		       bit(rw, 0));
		break;
	case 1:
		PDEBUG("reg1 IFPLL1 pll_en1 %d kv_en1 %d vtc_en1 %d lpf1 %d"
		       " cpl1 %d pdp1 %d autocal_en1 %d ld_en1 %d ifloopr %d"
		       " ifloopc %d dac1 %d",
		       bit(rw, 17), bit(rw, 16), bit(rw, 15), bit(rw, 14),
		       bit(rw, 13), bit(rw, 12), bit(rw, 11), bit(rw, 10),
		       bits(rw, 7, 9), bits(rw, 4, 6), bits(rw, 0, 3));
		break;
	case 2:
		PDEBUG("reg2 IFPLL2 n1 %d num1 %d",
		       bits(rw, 6, 17), bits(rw, 0, 5));
		break;
	case 3:
		PDEBUG("reg3 IFPLL3 num %d", bits(rw, 0, 17));
		break;
	case 4:
		PDEBUG("reg4 IFPLL4 dn1 %#04x ct_def1 %d kv_def1 %d",
		       bits(rw, 8, 16), bits(rw, 4, 7), bits(rw, 0, 3));
		break;
	case 5:
		PDEBUG("reg5 RFPLL1 pll_en %d kv_en %d vtc_en %d lpf %d cpl %d"
		       " pdp %d autocal_en %d ld_en %d rfloopr %d rfloopc %d"
		       " dac %d",
		       bit(rw, 17), bit(rw, 16), bit(rw, 15), bit(rw, 14),
		       bit(rw, 13), bit(rw, 12), bit(rw, 11), bit(rw, 10),
		       bits(rw, 7, 9), bits(rw, 4, 6), bits(rw, 0,3));
		break;
	case 6:
		PDEBUG("reg6 RFPLL2 n %d num %d",
		       bits(rw, 6, 17), bits(rw, 0, 5));
		break;
	case 7:
		PDEBUG("reg7 RFPLL3 num2 %d", bits(rw, 0, 17));
		break;
	case 8:
		PDEBUG("reg8 RFPLL4 dn %#06x ct_def %d kv_def %d",
		       bits(rw, 8, 16), bits(rw, 4, 7), bits(rw, 0, 3));
		break;
	case 9:
		PDEBUG("reg9 CAL1 tvco %d tlock %d m_ct_value %d ld_window %d",
		       bits(rw, 13, 17), bits(rw, 8, 12), bits(rw, 3, 7),
		       bits(rw, 0, 2));
		break;
	case 10:
		PDEBUG("reg10 TXRX1 rxdcfbbyps %d pcontrol %d txvgc %d"
		       " rxlpfbw %d txlpfbw %d txdiffmode %d txenmode %d"
		       " intbiasen %d tybypass %d",
		       bit(rw, 17), bits(rw, 15, 16), bits(rw, 10, 14),
		       bits(rw, 7, 9), bits(rw, 4, 6), bit(rw, 3), bit(rw, 2),
		       bit(rw, 1), bit(rw, 0));
		break;
	case 11:
		PDEBUG("reg11 PCNT1 mid_bias %d p_desired %d pc_offset %d"
			" tx_delay %d",
			bits(rw, 15, 17), bits(rw, 9, 14), bits(rw, 3, 8),
			bits(rw, 0, 2));
		break;
	case 12:
		PDEBUG("reg12 PCNT2 max_power %d mid_power %d min_power %d",
		       bits(rw, 12, 17), bits(rw, 6, 11), bits(rw, 0, 5));
		break;
	case 13:
		PDEBUG("reg13 VCOT1 rfpll vco comp %d ifpll vco comp %d"
		       " lobias %d if_biasbuf %d if_biasvco %d rf_biasbuf %d"
		       " rf_biasvco %d",
		       bit(rw, 17), bit(rw, 16), bit(rw, 15),
		       bits(rw, 8, 9), bits(rw, 5, 7), bits(rw, 3, 4),
		       bits(rw, 0, 2));
		break;
	case 14:
		PDEBUG("reg14 IQCAL rx_acal %d rx_pcal %d"
		       " tx_acal %d tx_pcal %d",
		       bits(rw, 13, 17), bits(rw, 9, 12), bits(rw, 4, 8),
		       bits(rw, 0, 3));
		break;
	}
}
#endif /* 0 */

static int rf2959_init_hw(struct zd_rf *rf)
{
	int r;
	struct zd_chip *chip = zd_rf_to_chip(rf);

	static const struct zd_ioreq16 ioreqs[] = {
		{ ZD_CR2,   0x1E }, { ZD_CR9,   0x20 }, { ZD_CR10,  0x89 },
		{ ZD_CR11,  0x00 }, { ZD_CR15,  0xD0 }, { ZD_CR17,  0x68 },
		{ ZD_CR19,  0x4a }, { ZD_CR20,  0x0c }, { ZD_CR21,  0x0E },
		{ ZD_CR23,  0x48 },
		/* normal size for cca threshold */
		{ ZD_CR24,  0x14 },
		/* { ZD_CR24,  0x20 }, */
		{ ZD_CR26,  0x90 }, { ZD_CR27,  0x30 }, { ZD_CR29,  0x20 },
		{ ZD_CR31,  0xb2 }, { ZD_CR32,  0x43 }, { ZD_CR33,  0x28 },
		{ ZD_CR38,  0x30 }, { ZD_CR34,  0x0f }, { ZD_CR35,  0xF0 },
		{ ZD_CR41,  0x2a }, { ZD_CR46,  0x7F }, { ZD_CR47,  0x1E },
		{ ZD_CR51,  0xc5 }, { ZD_CR52,  0xc5 }, { ZD_CR53,  0xc5 },
		{ ZD_CR79,  0x58 }, { ZD_CR80,  0x30 }, { ZD_CR81,  0x30 },
		{ ZD_CR82,  0x00 }, { ZD_CR83,  0x24 }, { ZD_CR84,  0x04 },
		{ ZD_CR85,  0x00 }, { ZD_CR86,  0x10 }, { ZD_CR87,  0x2A },
		{ ZD_CR88,  0x10 }, { ZD_CR89,  0x24 }, { ZD_CR90,  0x18 },
		/* { ZD_CR91,  0x18 }, */
		/* should solve continuous CTS frame problems */
		{ ZD_CR91,  0x00 },
		{ ZD_CR92,  0x0a }, { ZD_CR93,  0x00 }, { ZD_CR94,  0x01 },
		{ ZD_CR95,  0x00 }, { ZD_CR96,  0x40 }, { ZD_CR97,  0x37 },
		{ ZD_CR98,  0x05 }, { ZD_CR99,  0x28 }, { ZD_CR100, 0x00 },
		{ ZD_CR101, 0x13 }, { ZD_CR102, 0x27 }, { ZD_CR103, 0x27 },
		{ ZD_CR104, 0x18 }, { ZD_CR105, 0x12 },
		/* normal size */
		{ ZD_CR106, 0x1a },
		/* { ZD_CR106, 0x22 }, */
		{ ZD_CR107, 0x24 }, { ZD_CR108, 0x0a }, { ZD_CR109, 0x13 },
		{ ZD_CR110, 0x2F }, { ZD_CR111, 0x27 }, { ZD_CR112, 0x27 },
		{ ZD_CR113, 0x27 }, { ZD_CR114, 0x27 }, { ZD_CR115, 0x40 },
		{ ZD_CR116, 0x40 }, { ZD_CR117, 0xF0 }, { ZD_CR118, 0xF0 },
		{ ZD_CR119, 0x16 },
		/* no TX continuation */
		{ ZD_CR122, 0x00 },
		/* { ZD_CR122, 0xff }, */
		{ ZD_CR127, 0x03 }, { ZD_CR131, 0x08 }, { ZD_CR138, 0x28 },
		{ ZD_CR148, 0x44 }, { ZD_CR150, 0x10 }, { ZD_CR169, 0xBB },
		{ ZD_CR170, 0xBB },
	};

	static const u32 rv[] = {
		0x000007,  /* REG0(CFG1) */
		0x07dd43,  /* REG1(IFPLL1) */
		0x080959,  /* REG2(IFPLL2) */
		0x0e6666,
		0x116a57,  /* REG4 */
		0x17dd43,  /* REG5 */
		0x1819f9,  /* REG6 */
		0x1e6666,
		0x214554,
		0x25e7fa,
		0x27fffa,
		/* The Zydas driver somehow forgets to set this value. It's
		 * only set for Japan. We are using internal power control
		 * for now.
		 */
		0x294128, /* internal power */
		/* 0x28252c, */ /* External control TX power */
		/* ZD_CR31_CCK, ZD_CR51_6-36M, ZD_CR52_48M, ZD_CR53_54M */
		0x2c0000,
		0x300000,
		0x340000,  /* REG13(0xD) */
		0x381e0f,  /* REG14(0xE) */
		/* Bogus, RF2959's data sheet doesn't know register 27, which is
		 * actually referenced here. The commented 0x11 is 17.
		 */
		0x6c180f,  /* REG27(0x11) */
	};

	r = zd_iowrite16a_locked(chip, ioreqs, ARRAY_SIZE(ioreqs));
	if (r)
		return r;

	return zd_rfwritev_locked(chip, rv, ARRAY_SIZE(rv), RF_RV_BITS);
}

static int rf2959_set_channel(struct zd_rf *rf, u8 channel)
{
	int i, r;
	const u32 *rv = rf2959_table[channel-1];
	struct zd_chip *chip = zd_rf_to_chip(rf);

	for (i = 0; i < 2; i++) {
		r = zd_rfwrite_locked(chip, rv[i], RF_RV_BITS);
		if (r)
			return r;
	}
	return 0;
}

static int rf2959_switch_radio_on(struct zd_rf *rf)
{
	static const struct zd_ioreq16 ioreqs[] = {
		{ ZD_CR10, 0x89 },
		{ ZD_CR11, 0x00 },
	};
	struct zd_chip *chip = zd_rf_to_chip(rf);

	return zd_iowrite16a_locked(chip, ioreqs, ARRAY_SIZE(ioreqs));
}

static int rf2959_switch_radio_off(struct zd_rf *rf)
{
	static const struct zd_ioreq16 ioreqs[] = {
		{ ZD_CR10, 0x15 },
		{ ZD_CR11, 0x81 },
	};
	struct zd_chip *chip = zd_rf_to_chip(rf);

	return zd_iowrite16a_locked(chip, ioreqs, ARRAY_SIZE(ioreqs));
}

int zd_rf_init_rf2959(struct zd_rf *rf)
{
	struct zd_chip *chip = zd_rf_to_chip(rf);

	if (zd_chip_is_zd1211b(chip)) {
		dev_err(zd_chip_dev(chip),
		       "RF2959 is currently not supported for ZD1211B"
		       " devices\n");
		return -ENODEV;
	}
	rf->init_hw = rf2959_init_hw;
	rf->set_channel = rf2959_set_channel;
	rf->switch_radio_on = rf2959_switch_radio_on;
	rf->switch_radio_off = rf2959_switch_radio_off;
	return 0;
}