1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
6 * Purpose: Provide functions to setup NIC operation mode
8 * vnt_set_rspinf - Set RSPINF
9 * vnt_update_ifs - Update slotTime,SIFS,DIFS, and EIFS
10 * vnt_update_top_rates - Update BasicTopRate
11 * vnt_add_basic_rate - Add to BasicRateSet
12 * vnt_ofdm_min_rate - Check if any OFDM rate is in BasicRateSet
13 * vnt_get_tsf_offset - Calculate TSFOffset
14 * vnt_get_next_tbtt - Calculate Next Beacon TSF counter
15 * vnt_reset_next_tbtt - Set NIC Beacon time
16 * vnt_update_next_tbtt - Sync. NIC Beacon time
17 * vnt_radio_power_off - Turn Off NIC Radio Power
18 * vnt_radio_power_on - Turn On NIC Radio Power
21 * 06-10-2003 Bryan YC Fan: Re-write codes to support VT3253 spec.
22 * 08-26-2003 Kyle Hsu: Modify the definition type of dwIoBase.
23 * 09-01-2003 Bryan YC Fan: Add vnt_update_ifs().
27 #include <linux/bitops.h>
28 #include <linux/errno.h>
39 /* const u16 cw_rxbcntsf_off[MAX_RATE] =
40 * {17, 34, 96, 192, 34, 23, 17, 11, 8, 5, 4, 3};
43 static const u16 cw_rxbcntsf_off[MAX_RATE] = {
44 192, 96, 34, 17, 34, 23, 17, 11, 8, 5, 4, 3
47 int vnt_set_channel(struct vnt_private *priv, u32 connection_channel)
51 if (connection_channel > CB_MAX_CHANNEL || !connection_channel)
55 vnt_mac_reg_bits_on(priv, MAC_REG_MACCR, MACCR_CLRNAV);
57 /* Set Channel[7] = 0 to tell H/W channel is changing now. */
58 vnt_mac_reg_bits_off(priv, MAC_REG_CHANNEL,
59 (BIT(7) | BIT(5) | BIT(4)));
61 ret = vnt_control_out(priv, MESSAGE_TYPE_SELECT_CHANNEL,
62 connection_channel, 0, 0, NULL);
66 return vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_CHANNEL,
67 (u8)(connection_channel | 0x80));
70 static const u8 vnt_rspinf_b_short_table[] = {
71 0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x09, 0x00,
72 0x15, 0x00, 0x0a, 0x00, 0x0b, 0x00, 0x0b, 0x80
75 static const u8 vnt_rspinf_b_long_table[] = {
76 0x70, 0x00, 0x00, 0x00, 0x38, 0x00, 0x01, 0x00,
77 0x15, 0x00, 0x02, 0x00, 0x0b, 0x00, 0x03, 0x80
80 static const u8 vnt_rspinf_a_table[] = {
81 0x9b, 0x18, 0x9f, 0x10, 0x9a, 0x0a, 0x9e, 0x08, 0x99,
82 0x08, 0x9d, 0x04, 0x98, 0x04, 0x9c, 0x04, 0x9c, 0x04
85 static const u8 vnt_rspinf_gb_table[] = {
86 0x8b, 0x1e, 0x8f, 0x16, 0x8a, 0x12, 0x8e, 0x0e, 0x89,
87 0x0e, 0x8d, 0x0a, 0x88, 0x0a, 0x8c, 0x0a, 0x8c, 0x0a
90 int vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
96 if (priv->preamble_type) {
97 data = vnt_rspinf_b_short_table;
98 len = ARRAY_SIZE(vnt_rspinf_b_short_table);
100 data = vnt_rspinf_b_long_table;
101 len = ARRAY_SIZE(vnt_rspinf_b_long_table);
104 /* RSPINF_b_1 to RSPINF_b_11 */
105 ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_B_1,
106 MESSAGE_REQUEST_MACREG, len, data);
110 if (bb_type == BB_TYPE_11A) {
111 data = vnt_rspinf_a_table;
112 len = ARRAY_SIZE(vnt_rspinf_a_table);
114 data = vnt_rspinf_gb_table;
115 len = ARRAY_SIZE(vnt_rspinf_gb_table);
118 /* RSPINF_a_6 to RSPINF_a_72 */
119 return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_A_6,
120 MESSAGE_REQUEST_MACREG, len, data);
123 int vnt_update_ifs(struct vnt_private *priv)
129 if (priv->packet_type == PK_TYPE_11A) {
130 priv->slot = C_SLOT_SHORT;
131 priv->sifs = C_SIFS_A;
132 priv->difs = C_SIFS_A + 2 * C_SLOT_SHORT;
135 priv->sifs = C_SIFS_BG;
137 if (priv->short_slot_time) {
138 priv->slot = C_SLOT_SHORT;
141 priv->slot = C_SLOT_LONG;
145 priv->difs = C_SIFS_BG + 2 * priv->slot;
150 data[0] = (u8)priv->sifs;
151 data[1] = (u8)priv->difs;
152 data[2] = (u8)priv->eifs;
153 data[3] = (u8)priv->slot;
155 ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_SIFS,
156 MESSAGE_REQUEST_MACREG, 4, &data[0]);
162 return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_CWMAXMIN0,
163 MESSAGE_REQUEST_MACREG, 1, &max_min);
166 void vnt_update_top_rates(struct vnt_private *priv)
170 pos = fls(priv->basic_rates & GENMASK(RATE_54M, RATE_6M));
171 priv->top_ofdm_basic_rate = pos ? (pos - 1) : RATE_24M;
173 pos = fls(priv->basic_rates & GENMASK(RATE_11M, RATE_1M));
174 priv->top_cck_basic_rate = pos ? (pos - 1) : RATE_1M;
177 bool vnt_ofdm_min_rate(struct vnt_private *priv)
179 return priv->basic_rates & GENMASK(RATE_54M, RATE_6M) ? true : false;
182 u8 vnt_get_pkt_type(struct vnt_private *priv)
184 if (priv->bb_type == BB_TYPE_11A || priv->bb_type == BB_TYPE_11B)
185 return (u8)priv->bb_type;
186 else if (vnt_ofdm_min_rate(priv))
192 * Description: Calculate TSF offset of two TSF input
193 * Get TSF Offset from RxBCN's TSF and local TSF
198 * tsf1 - Rx BCN's TSF
203 * Return Value: TSF Offset value
206 u64 vnt_get_tsf_offset(u8 rx_rate, u64 tsf1, u64 tsf2)
208 return tsf1 - tsf2 - (u64)cw_rxbcntsf_off[rx_rate % MAX_RATE];
211 int vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
212 u64 time_stamp, u64 local_tsf)
217 tsf_offset = vnt_get_tsf_offset(rx_rate, time_stamp, local_tsf);
219 data[0] = (u8)tsf_offset;
220 data[1] = (u8)(tsf_offset >> 8);
221 data[2] = (u8)(tsf_offset >> 16);
222 data[3] = (u8)(tsf_offset >> 24);
223 data[4] = (u8)(tsf_offset >> 32);
224 data[5] = (u8)(tsf_offset >> 40);
225 data[6] = (u8)(tsf_offset >> 48);
226 data[7] = (u8)(tsf_offset >> 56);
228 return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
229 MESSAGE_REQUEST_TSF, 0, 8, data);
233 * Description: Clear NIC TSF counter
234 * Clear local TSF counter
238 * priv - The adapter to be read
240 * Return Value: true if success; otherwise false
243 bool vnt_clear_current_tsf(struct vnt_private *priv)
245 vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
247 priv->current_tsf = 0;
253 * Description: Read NIC TSF counter
254 * Get NEXTTBTT from adjusted TSF and Beacon Interval
258 * tsf - Current TSF counter
259 * beacon_interval - Beacon Interval
261 * tsf - Current TSF counter
263 * Return Value: TSF value of next Beacon
266 u64 vnt_get_next_tbtt(u64 tsf, u16 beacon_interval)
270 beacon_int = beacon_interval * 1024;
273 * ((local_current_TSF / beacon_interval) + 1) * beacon_interval
276 do_div(tsf, beacon_int);
284 int vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
289 vnt_clear_current_tsf(priv);
291 next_tbtt = vnt_get_next_tbtt(next_tbtt, beacon_interval);
293 data[0] = (u8)next_tbtt;
294 data[1] = (u8)(next_tbtt >> 8);
295 data[2] = (u8)(next_tbtt >> 16);
296 data[3] = (u8)(next_tbtt >> 24);
297 data[4] = (u8)(next_tbtt >> 32);
298 data[5] = (u8)(next_tbtt >> 40);
299 data[6] = (u8)(next_tbtt >> 48);
300 data[7] = (u8)(next_tbtt >> 56);
302 return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
303 MESSAGE_REQUEST_TBTT, 0, 8, data);
306 int vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
312 tsf = vnt_get_next_tbtt(tsf, beacon_interval);
315 data[1] = (u8)(tsf >> 8);
316 data[2] = (u8)(tsf >> 16);
317 data[3] = (u8)(tsf >> 24);
318 data[4] = (u8)(tsf >> 32);
319 data[5] = (u8)(tsf >> 40);
320 data[6] = (u8)(tsf >> 48);
321 data[7] = (u8)(tsf >> 56);
323 ret = vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
324 MESSAGE_REQUEST_TBTT, 0, 8, data);
328 dev_dbg(&priv->usb->dev, "%s TBTT: %8llx\n", __func__, tsf);
333 * Description: Turn off Radio power
337 * priv - The adapter to be turned off
341 * Return Value: true if success; otherwise false
344 int vnt_radio_power_off(struct vnt_private *priv)
348 switch (priv->rf_type) {
353 ret = vnt_mac_reg_bits_off(priv, MAC_REG_SOFTPWRCTL,
362 ret = vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_RXON);
366 ret = vnt_set_deep_sleep(priv);
370 ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
377 * Description: Turn on Radio power
381 * priv - The adapter to be turned on
385 * Return Value: true if success; otherwise false
388 int vnt_radio_power_on(struct vnt_private *priv)
392 ret = vnt_exit_deep_sleep(priv);
396 ret = vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_RXON);
400 switch (priv->rf_type) {
405 ret = vnt_mac_reg_bits_on(priv, MAC_REG_SOFTPWRCTL,
412 return vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
415 int vnt_set_bss_mode(struct vnt_private *priv)
418 unsigned char type = priv->bb_type;
419 unsigned char data = 0;
420 unsigned char bb_vga_2_3 = 0x00;
422 ret = vnt_mac_set_bb_type(priv, type);
426 priv->packet_type = vnt_get_pkt_type(priv);
428 if (priv->bb_type == BB_TYPE_11A) {
431 } else if (priv->bb_type == BB_TYPE_11B) {
433 } else if (priv->bb_type == BB_TYPE_11G) {
438 ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
444 ret = vnt_update_ifs(priv);
448 ret = vnt_set_rspinf(priv, priv->bb_type);
452 priv->bb_vga[2] = bb_vga_2_3;
453 priv->bb_vga[3] = bb_vga_2_3;
455 return vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);