1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 Copyright (C) 2009 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
4 Copyright (C) 2009 Alban Browaeys <prahal@yahoo.com>
5 Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
6 Copyright (C) 2009 Luis Correia <luis.f.correia@gmail.com>
7 Copyright (C) 2009 Mattias Nissler <mattias.nissler@gmx.de>
8 Copyright (C) 2009 Mark Asselstine <asselsm@gmail.com>
9 Copyright (C) 2009 Xose Vazquez Perez <xose.vazquez@gmail.com>
10 Copyright (C) 2009 Bart Zolnierkiewicz <bzolnier@gmail.com>
11 <http://rt2x00.serialmonkey.com>
12
13 */
14
15/*
16 Module: rt2800pci
17 Abstract: rt2800pci device specific routines.
18 Supported chipsets: RT2800E & RT2800ED.
19 */
20
21#include <linux/delay.h>
22#include <linux/etherdevice.h>
23#include <linux/init.h>
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/pci.h>
27#include <linux/eeprom_93cx6.h>
28
29#include "rt2x00.h"
30#include "rt2x00mmio.h"
31#include "rt2x00pci.h"
32#include "rt2800lib.h"
33#include "rt2800mmio.h"
34#include "rt2800.h"
35#include "rt2800pci.h"
36
37/*
38 * Allow hardware encryption to be disabled.
39 */
40static bool modparam_nohwcrypt = false;
41module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);
42MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
43
44static bool rt2800pci_hwcrypt_disabled(struct rt2x00_dev *rt2x00dev)
45{
46 return modparam_nohwcrypt;
47}
48
49static void rt2800pci_mcu_status(struct rt2x00_dev *rt2x00dev, const u8 token)
50{
51 unsigned int i;
52 u32 reg;
53
54 /*
55 * SOC devices don't support MCU requests.
56 */
57 if (rt2x00_is_soc(rt2x00dev))
58 return;
59
60 for (i = 0; i < 200; i++) {
61 reg = rt2x00mmio_register_read(rt2x00dev, H2M_MAILBOX_CID);
62
63 if ((rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD0) == token) ||
64 (rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD1) == token) ||
65 (rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD2) == token) ||
66 (rt2x00_get_field32(reg, H2M_MAILBOX_CID_CMD3) == token))
67 break;
68
69 udelay(REGISTER_BUSY_DELAY);
70 }
71
72 if (i == 200)
73 rt2x00_err(rt2x00dev, "MCU request failed, no response from hardware\n");
74
75 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_STATUS, value: ~0);
76 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CID, value: ~0);
77}
78
79static void rt2800pci_eepromregister_read(struct eeprom_93cx6 *eeprom)
80{
81 struct rt2x00_dev *rt2x00dev = eeprom->data;
82 u32 reg;
83
84 reg = rt2x00mmio_register_read(rt2x00dev, E2PROM_CSR);
85
86 eeprom->reg_data_in = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_IN);
87 eeprom->reg_data_out = !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_OUT);
88 eeprom->reg_data_clock =
89 !!rt2x00_get_field32(reg, E2PROM_CSR_DATA_CLOCK);
90 eeprom->reg_chip_select =
91 !!rt2x00_get_field32(reg, E2PROM_CSR_CHIP_SELECT);
92}
93
94static void rt2800pci_eepromregister_write(struct eeprom_93cx6 *eeprom)
95{
96 struct rt2x00_dev *rt2x00dev = eeprom->data;
97 u32 reg = 0;
98
99 rt2x00_set_field32(&reg, E2PROM_CSR_DATA_IN, !!eeprom->reg_data_in);
100 rt2x00_set_field32(&reg, E2PROM_CSR_DATA_OUT, !!eeprom->reg_data_out);
101 rt2x00_set_field32(&reg, E2PROM_CSR_DATA_CLOCK,
102 !!eeprom->reg_data_clock);
103 rt2x00_set_field32(&reg, E2PROM_CSR_CHIP_SELECT,
104 !!eeprom->reg_chip_select);
105
106 rt2x00mmio_register_write(rt2x00dev, E2PROM_CSR, value: reg);
107}
108
109static int rt2800pci_read_eeprom_pci(struct rt2x00_dev *rt2x00dev)
110{
111 struct eeprom_93cx6 eeprom;
112 u32 reg;
113
114 reg = rt2x00mmio_register_read(rt2x00dev, E2PROM_CSR);
115
116 eeprom.data = rt2x00dev;
117 eeprom.register_read = rt2800pci_eepromregister_read;
118 eeprom.register_write = rt2800pci_eepromregister_write;
119 switch (rt2x00_get_field32(reg, E2PROM_CSR_TYPE))
120 {
121 case 0:
122 eeprom.width = PCI_EEPROM_WIDTH_93C46;
123 break;
124 case 1:
125 eeprom.width = PCI_EEPROM_WIDTH_93C66;
126 break;
127 default:
128 eeprom.width = PCI_EEPROM_WIDTH_93C86;
129 break;
130 }
131 eeprom.reg_data_in = 0;
132 eeprom.reg_data_out = 0;
133 eeprom.reg_data_clock = 0;
134 eeprom.reg_chip_select = 0;
135
136 eeprom_93cx6_multiread(eeprom: &eeprom, EEPROM_BASE, data: rt2x00dev->eeprom,
137 EEPROM_SIZE / sizeof(u16));
138
139 return 0;
140}
141
142static int rt2800pci_efuse_detect(struct rt2x00_dev *rt2x00dev)
143{
144 return rt2800_efuse_detect(rt2x00dev);
145}
146
147static inline int rt2800pci_read_eeprom_efuse(struct rt2x00_dev *rt2x00dev)
148{
149 return rt2800_read_eeprom_efuse(rt2x00dev);
150}
151
152/*
153 * Firmware functions
154 */
155static char *rt2800pci_get_firmware_name(struct rt2x00_dev *rt2x00dev)
156{
157 /*
158 * Chip rt3290 use specific 4KB firmware named rt3290.bin.
159 */
160 if (rt2x00_rt(rt2x00dev, RT3290))
161 return FIRMWARE_RT3290;
162 else
163 return FIRMWARE_RT2860;
164}
165
166static int rt2800pci_write_firmware(struct rt2x00_dev *rt2x00dev,
167 const u8 *data, const size_t len)
168{
169 u32 reg;
170
171 /*
172 * enable Host program ram write selection
173 */
174 reg = 0;
175 rt2x00_set_field32(&reg, PBF_SYS_CTRL_HOST_RAM_WRITE, 1);
176 rt2x00mmio_register_write(rt2x00dev, PBF_SYS_CTRL, value: reg);
177
178 /*
179 * Write firmware to device.
180 */
181 rt2x00mmio_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
182 value: data, length: len);
183
184 rt2x00mmio_register_write(rt2x00dev, PBF_SYS_CTRL, value: 0x00000);
185 rt2x00mmio_register_write(rt2x00dev, PBF_SYS_CTRL, value: 0x00001);
186
187 rt2x00mmio_register_write(rt2x00dev, H2M_BBP_AGENT, value: 0);
188 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CSR, value: 0);
189
190 return 0;
191}
192
193/*
194 * Device state switch handlers.
195 */
196static int rt2800pci_enable_radio(struct rt2x00_dev *rt2x00dev)
197{
198 int retval;
199
200 retval = rt2800mmio_enable_radio(rt2x00dev);
201 if (retval)
202 return retval;
203
204 /* After resume MCU_BOOT_SIGNAL will trash these. */
205 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_STATUS, value: ~0);
206 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CID, value: ~0);
207
208 rt2800_mcu_request(rt2x00dev, MCU_SLEEP, TOKEN_RADIO_OFF, arg0: 0xff, arg1: 0x02);
209 rt2800pci_mcu_status(rt2x00dev, TOKEN_RADIO_OFF);
210
211 rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKEUP, arg0: 0, arg1: 0);
212 rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKEUP);
213
214 return retval;
215}
216
217static int rt2800pci_set_state(struct rt2x00_dev *rt2x00dev,
218 enum dev_state state)
219{
220 if (state == STATE_AWAKE) {
221 rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKEUP,
222 arg0: 0, arg1: 0x02);
223 rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKEUP);
224 } else if (state == STATE_SLEEP) {
225 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_STATUS,
226 value: 0xffffffff);
227 rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CID,
228 value: 0xffffffff);
229 rt2800_mcu_request(rt2x00dev, MCU_SLEEP, TOKEN_SLEEP,
230 arg0: 0xff, arg1: 0x01);
231 }
232
233 return 0;
234}
235
236static int rt2800pci_set_device_state(struct rt2x00_dev *rt2x00dev,
237 enum dev_state state)
238{
239 int retval = 0;
240
241 switch (state) {
242 case STATE_RADIO_ON:
243 retval = rt2800pci_enable_radio(rt2x00dev);
244 break;
245 case STATE_RADIO_OFF:
246 /*
247 * After the radio has been disabled, the device should
248 * be put to sleep for powersaving.
249 */
250 rt2800pci_set_state(rt2x00dev, state: STATE_SLEEP);
251 break;
252 case STATE_RADIO_IRQ_ON:
253 case STATE_RADIO_IRQ_OFF:
254 rt2800mmio_toggle_irq(rt2x00dev, state);
255 break;
256 case STATE_DEEP_SLEEP:
257 case STATE_SLEEP:
258 case STATE_STANDBY:
259 case STATE_AWAKE:
260 retval = rt2800pci_set_state(rt2x00dev, state);
261 break;
262 default:
263 retval = -ENOTSUPP;
264 break;
265 }
266
267 if (unlikely(retval))
268 rt2x00_err(rt2x00dev, "Device failed to enter state %d (%d)\n",
269 state, retval);
270
271 return retval;
272}
273
274/*
275 * Device probe functions.
276 */
277static int rt2800pci_read_eeprom(struct rt2x00_dev *rt2x00dev)
278{
279 int retval;
280
281 if (rt2800pci_efuse_detect(rt2x00dev))
282 retval = rt2800pci_read_eeprom_efuse(rt2x00dev);
283 else
284 retval = rt2800pci_read_eeprom_pci(rt2x00dev);
285
286 return retval;
287}
288
289static const struct ieee80211_ops rt2800pci_mac80211_ops = {
290 .add_chanctx = ieee80211_emulate_add_chanctx,
291 .remove_chanctx = ieee80211_emulate_remove_chanctx,
292 .change_chanctx = ieee80211_emulate_change_chanctx,
293 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
294 .tx = rt2x00mac_tx,
295 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
296 .start = rt2x00mac_start,
297 .stop = rt2x00mac_stop,
298 .add_interface = rt2x00mac_add_interface,
299 .remove_interface = rt2x00mac_remove_interface,
300 .config = rt2x00mac_config,
301 .configure_filter = rt2x00mac_configure_filter,
302 .set_key = rt2x00mac_set_key,
303 .sw_scan_start = rt2x00mac_sw_scan_start,
304 .sw_scan_complete = rt2x00mac_sw_scan_complete,
305 .get_stats = rt2x00mac_get_stats,
306 .get_key_seq = rt2800_get_key_seq,
307 .set_rts_threshold = rt2800_set_rts_threshold,
308 .sta_add = rt2800_sta_add,
309 .sta_remove = rt2800_sta_remove,
310 .bss_info_changed = rt2x00mac_bss_info_changed,
311 .conf_tx = rt2800_conf_tx,
312 .get_tsf = rt2800_get_tsf,
313 .rfkill_poll = rt2x00mac_rfkill_poll,
314 .ampdu_action = rt2800_ampdu_action,
315 .flush = rt2x00mac_flush,
316 .get_survey = rt2800_get_survey,
317 .get_ringparam = rt2x00mac_get_ringparam,
318 .tx_frames_pending = rt2x00mac_tx_frames_pending,
319 .reconfig_complete = rt2x00mac_reconfig_complete,
320};
321
322static const struct rt2800_ops rt2800pci_rt2800_ops = {
323 .register_read = rt2x00mmio_register_read,
324 .register_read_lock = rt2x00mmio_register_read, /* same for PCI */
325 .register_write = rt2x00mmio_register_write,
326 .register_write_lock = rt2x00mmio_register_write, /* same for PCI */
327 .register_multiread = rt2x00mmio_register_multiread,
328 .register_multiwrite = rt2x00mmio_register_multiwrite,
329 .regbusy_read = rt2x00mmio_regbusy_read,
330 .read_eeprom = rt2800pci_read_eeprom,
331 .hwcrypt_disabled = rt2800pci_hwcrypt_disabled,
332 .drv_write_firmware = rt2800pci_write_firmware,
333 .drv_init_registers = rt2800mmio_init_registers,
334 .drv_get_txwi = rt2800mmio_get_txwi,
335 .drv_get_dma_done = rt2800mmio_get_dma_done,
336};
337
338static const struct rt2x00lib_ops rt2800pci_rt2x00_ops = {
339 .irq_handler = rt2800mmio_interrupt,
340 .txstatus_tasklet = rt2800mmio_txstatus_tasklet,
341 .pretbtt_tasklet = rt2800mmio_pretbtt_tasklet,
342 .tbtt_tasklet = rt2800mmio_tbtt_tasklet,
343 .rxdone_tasklet = rt2800mmio_rxdone_tasklet,
344 .autowake_tasklet = rt2800mmio_autowake_tasklet,
345 .probe_hw = rt2800mmio_probe_hw,
346 .get_firmware_name = rt2800pci_get_firmware_name,
347 .check_firmware = rt2800_check_firmware,
348 .load_firmware = rt2800_load_firmware,
349 .initialize = rt2x00mmio_initialize,
350 .uninitialize = rt2x00mmio_uninitialize,
351 .get_entry_state = rt2800mmio_get_entry_state,
352 .clear_entry = rt2800mmio_clear_entry,
353 .set_device_state = rt2800pci_set_device_state,
354 .rfkill_poll = rt2800_rfkill_poll,
355 .link_stats = rt2800_link_stats,
356 .reset_tuner = rt2800_reset_tuner,
357 .link_tuner = rt2800_link_tuner,
358 .gain_calibration = rt2800_gain_calibration,
359 .vco_calibration = rt2800_vco_calibration,
360 .watchdog = rt2800_watchdog,
361 .start_queue = rt2800mmio_start_queue,
362 .kick_queue = rt2800mmio_kick_queue,
363 .stop_queue = rt2800mmio_stop_queue,
364 .flush_queue = rt2800mmio_flush_queue,
365 .write_tx_desc = rt2800mmio_write_tx_desc,
366 .write_tx_data = rt2800_write_tx_data,
367 .write_beacon = rt2800_write_beacon,
368 .clear_beacon = rt2800_clear_beacon,
369 .fill_rxdone = rt2800mmio_fill_rxdone,
370 .config_shared_key = rt2800_config_shared_key,
371 .config_pairwise_key = rt2800_config_pairwise_key,
372 .config_filter = rt2800_config_filter,
373 .config_intf = rt2800_config_intf,
374 .config_erp = rt2800_config_erp,
375 .config_ant = rt2800_config_ant,
376 .config = rt2800_config,
377 .pre_reset_hw = rt2800_pre_reset_hw,
378};
379
380static const struct rt2x00_ops rt2800pci_ops = {
381 .name = KBUILD_MODNAME,
382 .drv_data_size = sizeof(struct rt2800_drv_data),
383 .max_ap_intf = 8,
384 .eeprom_size = EEPROM_SIZE,
385 .rf_size = RF_SIZE,
386 .tx_queues = NUM_TX_QUEUES,
387 .queue_init = rt2800mmio_queue_init,
388 .lib = &rt2800pci_rt2x00_ops,
389 .drv = &rt2800pci_rt2800_ops,
390 .hw = &rt2800pci_mac80211_ops,
391#ifdef CONFIG_RT2X00_LIB_DEBUGFS
392 .debugfs = &rt2800_rt2x00debug,
393#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
394};
395
396/*
397 * RT2800pci module information.
398 */
399static const struct pci_device_id rt2800pci_device_table[] = {
400 { PCI_DEVICE(0x1814, 0x0601) },
401 { PCI_DEVICE(0x1814, 0x0681) },
402 { PCI_DEVICE(0x1814, 0x0701) },
403 { PCI_DEVICE(0x1814, 0x0781) },
404 { PCI_DEVICE(0x1814, 0x3090) },
405 { PCI_DEVICE(0x1814, 0x3091) },
406 { PCI_DEVICE(0x1814, 0x3092) },
407 { PCI_DEVICE(0x1432, 0x7708) },
408 { PCI_DEVICE(0x1432, 0x7727) },
409 { PCI_DEVICE(0x1432, 0x7728) },
410 { PCI_DEVICE(0x1432, 0x7738) },
411 { PCI_DEVICE(0x1432, 0x7748) },
412 { PCI_DEVICE(0x1432, 0x7758) },
413 { PCI_DEVICE(0x1432, 0x7768) },
414 { PCI_DEVICE(0x1462, 0x891a) },
415 { PCI_DEVICE(0x1a3b, 0x1059) },
416#ifdef CONFIG_RT2800PCI_RT3290
417 { PCI_DEVICE(0x1814, 0x3290) },
418#endif
419#ifdef CONFIG_RT2800PCI_RT33XX
420 { PCI_DEVICE(0x1814, 0x3390) },
421#endif
422#ifdef CONFIG_RT2800PCI_RT35XX
423 { PCI_DEVICE(0x1432, 0x7711) },
424 { PCI_DEVICE(0x1432, 0x7722) },
425 { PCI_DEVICE(0x1814, 0x3060) },
426 { PCI_DEVICE(0x1814, 0x3062) },
427 { PCI_DEVICE(0x1814, 0x3562) },
428 { PCI_DEVICE(0x1814, 0x3592) },
429 { PCI_DEVICE(0x1814, 0x3593) },
430 { PCI_DEVICE(0x1814, 0x359f) },
431#endif
432#ifdef CONFIG_RT2800PCI_RT53XX
433 { PCI_DEVICE(0x1814, 0x5360) },
434 { PCI_DEVICE(0x1814, 0x5362) },
435 { PCI_DEVICE(0x1814, 0x5390) },
436 { PCI_DEVICE(0x1814, 0x5392) },
437 { PCI_DEVICE(0x1814, 0x539a) },
438 { PCI_DEVICE(0x1814, 0x539b) },
439 { PCI_DEVICE(0x1814, 0x539f) },
440#endif
441 { 0, }
442};
443
444MODULE_AUTHOR(DRV_PROJECT);
445MODULE_VERSION(DRV_VERSION);
446MODULE_DESCRIPTION("Ralink RT2800 PCI & PCMCIA Wireless LAN driver.");
447MODULE_FIRMWARE(FIRMWARE_RT2860);
448MODULE_DEVICE_TABLE(pci, rt2800pci_device_table);
449MODULE_LICENSE("GPL");
450
451static int rt2800pci_probe(struct pci_dev *pci_dev,
452 const struct pci_device_id *id)
453{
454 return rt2x00pci_probe(pci_dev, ops: &rt2800pci_ops);
455}
456
457static struct pci_driver rt2800pci_driver = {
458 .name = KBUILD_MODNAME,
459 .id_table = rt2800pci_device_table,
460 .probe = rt2800pci_probe,
461 .remove = rt2x00pci_remove,
462 .driver.pm = &rt2x00pci_pm_ops,
463};
464
465module_pci_driver(rt2800pci_driver);
466

source code of linux/drivers/net/wireless/ralink/rt2x00/rt2800pci.c