[PATCH] zd1211rw: Support AL7230B RF

This patch adds support for another Airoha RF which is present in some
ZD1211 adapters. This RF supports 802.11a as well as 802.11b/g, but 802.11a
connectivity is not yet supported by this driver.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/zd1211rw/Makefile

@@ -3,6 +3,7 @@ obj-$(CONFIG_ZD1211RW) += zd1211rw.o
 zd1211rw-objs := zd_chip.o zd_ieee80211.o \
 		zd_mac.o zd_netdev.o \
 		zd_rf_al2230.o zd_rf_rf2959.o \
+		zd_rf_al7230b.o \
 		zd_rf.o zd_usb.o zd_util.o
 
 ifeq ($(CONFIG_ZD1211RW_DEBUG),y)

drivers/net/wireless/zd1211rw/zd_chip.c

@@ -1624,7 +1624,7 @@ int zd_rfwritev_locked(struct zd_chip *chip,
  * We can optionally program the RF directly through CR regs, if supported by
  * the hardware. This is much faster than the older method.
  */
-static int zd_rfwrite_cr_locked(struct zd_chip *chip, u32 value)
+int zd_rfwrite_cr_locked(struct zd_chip *chip, u32 value)
 {
 	struct zd_ioreq16 ioreqs[] = {
 		{ CR244, (value >> 16) & 0xff },

drivers/net/wireless/zd1211rw/zd_chip.h

@@ -747,6 +747,8 @@ static inline int zd_rfwrite_locked(struct zd_chip *chip, u32 value, u8 bits)
 	return zd_usb_rfwrite(&chip->usb, value, bits);
 }
 
+int zd_rfwrite_cr_locked(struct zd_chip *chip, u32 value);
+
 int zd_rfwritev_locked(struct zd_chip *chip,
 	               const u32* values, unsigned int count, u8 bits);
 int zd_rfwritev_cr_locked(struct zd_chip *chip,

drivers/net/wireless/zd1211rw/zd_rf.c

@@ -76,6 +76,11 @@ int zd_rf_init_hw(struct zd_rf *rf, u8 type)
 		if (r)
 			return r;
 		break;
+	case AL7230B_RF:
+		r = zd_rf_init_al7230b(rf);
+		if (r)
+			return r;
+		break;
 	default:
 		dev_err(zd_chip_dev(chip),
 			"RF %s %#x is not supported\n", zd_rf_name(type), type);

drivers/net/wireless/zd1211rw/zd_rf.h

@@ -78,5 +78,6 @@ int zd_switch_radio_off(struct zd_rf *rf);
 
 int zd_rf_init_rf2959(struct zd_rf *rf);
 int zd_rf_init_al2230(struct zd_rf *rf);
+int zd_rf_init_al7230b(struct zd_rf *rf);
 
 #endif /* _ZD_RF_H */

drivers/net/wireless/zd1211rw/zd_rf_al7230b.c

@@ -0,0 +1,274 @@
+/* zd_rf_al7230b.c: Functions for the AL7230B RF controller
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+
+#include "zd_rf.h"
+#include "zd_usb.h"
+#include "zd_chip.h"
+
+static const u32 chan_rv[][2] = {
+	RF_CHANNEL( 1) = { 0x09ec00, 0x8cccc8 },
+	RF_CHANNEL( 2) = { 0x09ec00, 0x8cccd8 },
+	RF_CHANNEL( 3) = { 0x09ec00, 0x8cccc0 },
+	RF_CHANNEL( 4) = { 0x09ec00, 0x8cccd0 },
+	RF_CHANNEL( 5) = { 0x05ec00, 0x8cccc8 },
+	RF_CHANNEL( 6) = { 0x05ec00, 0x8cccd8 },
+	RF_CHANNEL( 7) = { 0x05ec00, 0x8cccc0 },
+	RF_CHANNEL( 8) = { 0x05ec00, 0x8cccd0 },
+	RF_CHANNEL( 9) = { 0x0dec00, 0x8cccc8 },
+	RF_CHANNEL(10) = { 0x0dec00, 0x8cccd8 },
+	RF_CHANNEL(11) = { 0x0dec00, 0x8cccc0 },
+	RF_CHANNEL(12) = { 0x0dec00, 0x8cccd0 },
+	RF_CHANNEL(13) = { 0x03ec00, 0x8cccc8 },
+	RF_CHANNEL(14) = { 0x03ec00, 0x866660 },
+};
+
+static const u32 std_rv[] = {
+	0x4ff821,
+	0xc5fbfc,
+	0x21ebfe,
+	0xafd401, /* freq shift 0xaad401 */
+	0x6cf56a,
+	0xe04073,
+	0x193d76,
+	0x9dd844,
+	0x500007,
+	0xd8c010,
+};
+
+static int al7230b_init_hw(struct zd_rf *rf)
+{
+	int i, r;
+	struct zd_chip *chip = zd_rf_to_chip(rf);
+
+	/* All of these writes are identical to AL2230 unless otherwise
+	 * specified */
+	static const struct zd_ioreq16 ioreqs_1[] = {
+		/* This one is 7230-specific, and happens before the rest */
+		{ CR240,  0x57 },
+		{ },
+
+		{ CR15,   0x20 }, { CR23,   0x40 }, { CR24,  0x20 },
+		{ CR26,   0x11 }, { CR28,   0x3e }, { CR29,  0x00 },
+		{ CR44,   0x33 },
+		/* This value is different for 7230 (was: 0x2a) */
+		{ CR106,  0x22 },
+		{ CR107,  0x1a }, { CR109,  0x09 }, { CR110,  0x27 },
+		{ CR111,  0x2b }, { CR112,  0x2b }, { CR119,  0x0a },
+		/* This happened further down in AL2230,
+		 * and the value changed (was: 0xe0) */
+		{ CR122,  0xfc },
+		{ CR10,   0x89 },
+		/* for newest (3rd cut) AL2300 */
+		{ CR17,   0x28 },
+		{ CR26,   0x93 }, { CR34,   0x30 },
+		/* for newest (3rd cut) AL2300 */
+		{ CR35,   0x3e },
+		{ CR41,   0x24 }, { CR44,   0x32 },
+		/* for newest (3rd cut) AL2300 */
+		{ CR46,   0x96 },
+		{ CR47,   0x1e }, { CR79,   0x58 }, { CR80,  0x30 },
+		{ CR81,   0x30 }, { CR87,   0x0a }, { CR89,  0x04 },
+		{ CR92,   0x0a }, { CR99,   0x28 },
+		/* This value is different for 7230 (was: 0x00) */
+		{ CR100,  0x02 },
+		{ CR101,  0x13 }, { CR102,  0x27 },
+		/* This value is different for 7230 (was: 0x24) */
+		{ CR106,  0x22 },
+		/* This value is different for 7230 (was: 0x2a) */
+		{ CR107,  0x3f },
+		{ CR109,  0x09 },
+		/* This value is different for 7230 (was: 0x13) */
+		{ CR110,  0x1f },
+		{ CR111,  0x1f }, { CR112,  0x1f }, { CR113, 0x27 },
+		{ CR114,  0x27 },
+		/* for newest (3rd cut) AL2300 */
+		{ CR115,  0x24 },
+		/* This value is different for 7230 (was: 0x24) */
+		{ CR116,  0x3f },
+		/* This value is different for 7230 (was: 0xf4) */
+		{ CR117,  0xfa },
+		{ CR118,  0xfc }, { CR119,  0x10 }, { CR120, 0x4f },
+		{ CR121,  0x77 }, { CR137,  0x88 },
+		/* This one is 7230-specific */
+		{ CR138,  0xa8 },
+		/* This value is different for 7230 (was: 0xff) */
+		{ CR252,  0x34 },
+		/* This value is different for 7230 (was: 0xff) */
+		{ CR253,  0x34 },
+
+		/* PLL_OFF */
+		{ CR251, 0x2f },
+	};
+
+	static const struct zd_ioreq16 ioreqs_2[] = {
+		/* PLL_ON */
+		{ CR251, 0x3f },
+		{ CR128, 0x14 }, { CR129, 0x12 }, { CR130, 0x10 },
+		{ CR38, 0x38 }, { CR136, 0xdf },
+	};
+
+	r = zd_iowrite16a_locked(chip, ioreqs_1, ARRAY_SIZE(ioreqs_1));
+	if (r)
+		return r;
+
+	r = zd_rfwrite_cr_locked(chip, 0x09ec04);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0x8cccc8);
+	if (r)
+		return r;
+
+	for (i = 0; i < ARRAY_SIZE(std_rv); i++) {
+		r = zd_rfwrite_cr_locked(chip, std_rv[i]);
+		if (r)
+			return r;
+	}
+
+	r = zd_rfwrite_cr_locked(chip, 0x3c9000);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0xbfffff);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0x700000);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0xf15d58);
+	if (r)
+		return r;
+
+	r = zd_iowrite16a_locked(chip, ioreqs_2, ARRAY_SIZE(ioreqs_2));
+	if (r)
+		return r;
+
+	r = zd_rfwrite_cr_locked(chip, 0xf15d59);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0xf15d5c);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0xf15d58);
+	if (r)
+		return r;
+
+	r = zd_iowrite16_locked(chip, 0x06, CR203);
+	if (r)
+		return r;
+	r = zd_iowrite16_locked(chip, 0x80, CR240);
+	if (r)
+		return r;
+
+	return 0;
+}
+
+static int al7230b_set_channel(struct zd_rf *rf, u8 channel)
+{
+	int i, r;
+	const u32 *rv = chan_rv[channel-1];
+	struct zd_chip *chip = zd_rf_to_chip(rf);
+
+	struct zd_ioreq16 ioreqs_1[] = {
+		{ CR128, 0x14 }, { CR129, 0x12 }, { CR130, 0x10 },
+		{ CR38,  0x38 }, { CR136, 0xdf },
+	};
+
+	struct zd_ioreq16 ioreqs_2[] = {
+		/* PLL_ON */
+		{ CR251, 0x3f },
+		{ CR203, 0x06 }, { CR240, 0x08 },
+	};
+
+	r = zd_iowrite16_locked(chip, 0x57, CR240);
+	if (r)
+		return r;
+
+	/* PLL_OFF */
+	r = zd_iowrite16_locked(chip, 0x2f, CR251);
+	if (r)
+		return r;
+
+	for (i = 0; i < ARRAY_SIZE(std_rv); i++) {
+		r = zd_rfwrite_cr_locked(chip, std_rv[i]);
+		if (r)
+			return r;
+	}
+
+	r = zd_rfwrite_cr_locked(chip, 0x3c9000);
+	if (r)
+		return r;
+	r = zd_rfwrite_cr_locked(chip, 0xf15d58);
+	if (r)
+		return r;
+
+	r = zd_iowrite16a_locked(chip, ioreqs_1, ARRAY_SIZE(ioreqs_1));
+	if (r)
+		return r;
+
+	for (i = 0; i < 2; i++) {
+		r = zd_rfwrite_cr_locked(chip, rv[i]);
+		if (r)
+			return r;
+	}
+
+	r = zd_rfwrite_cr_locked(chip, 0x3c9000);
+	if (r)
+		return r;
+
+	return zd_iowrite16a_locked(chip, ioreqs_2, ARRAY_SIZE(ioreqs_2));
+}
+
+static int al7230b_switch_radio_on(struct zd_rf *rf)
+{
+	struct zd_chip *chip = zd_rf_to_chip(rf);
+	static const struct zd_ioreq16 ioreqs[] = {
+		{ CR11,  0x00 },
+		{ CR251, 0x3f },
+	};
+
+	return zd_iowrite16a_locked(chip, ioreqs, ARRAY_SIZE(ioreqs));
+}
+
+static int al7230b_switch_radio_off(struct zd_rf *rf)
+{
+	struct zd_chip *chip = zd_rf_to_chip(rf);
+	static const struct zd_ioreq16 ioreqs[] = {
+		{ CR11,  0x04 },
+		{ CR251, 0x2f },
+	};
+
+	return zd_iowrite16a_locked(chip, ioreqs, ARRAY_SIZE(ioreqs));
+}
+
+int zd_rf_init_al7230b(struct zd_rf *rf)
+{
+	struct zd_chip *chip = zd_rf_to_chip(rf);
+
+	if (chip->is_zd1211b) {
+		dev_err(zd_chip_dev(chip), "AL7230B is currently not "
+			"supported for ZD1211B devices\n");
+		return -ENODEV;
+	}
+
+	rf->init_hw = al7230b_init_hw;
+	rf->set_channel = al7230b_set_channel;
+	rf->switch_radio_on = al7230b_switch_radio_on;
+	rf->switch_radio_off = al7230b_switch_radio_off;
+	rf->patch_6m_band_edge = 1;
+	return 0;
+}