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, ~0);
76	rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CID, ~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, 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_BASE, 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, reg);
177
178	/*
179	 * Write firmware to device.
180	 */
181	rt2x00mmio_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
182				       data, len);
183
184	rt2x00mmio_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00000);
185	rt2x00mmio_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00001);
186
187	rt2x00mmio_register_write(rt2x00dev, H2M_BBP_AGENT, 0);
188	rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CSR, 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, ~0);
206	rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
207
208	rt2800_mcu_request(rt2x00dev, MCU_SLEEP, TOKEN_RADIO_OFF, 0xff, 0x02);
209	rt2800pci_mcu_status(rt2x00dev, TOKEN_RADIO_OFF);
210
211	rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKEUP, 0, 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				   0, 0x02);
223		rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKEUP);
224	} else if (state == STATE_SLEEP) {
225		rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_STATUS,
226					  0xffffffff);
227		rt2x00mmio_register_write(rt2x00dev, H2M_MAILBOX_CID,
228					  0xffffffff);
229		rt2800_mcu_request(rt2x00dev, MCU_SLEEP, TOKEN_SLEEP,
230				   0xff, 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_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, &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