1/*	$OpenBSD: if_rtwn.c,v 1.6 2015/08/28 00:03:53 deraadt Exp $	*/
2
3/*-
4 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
5 * Copyright (c) 2015 Stefan Sperling <stsp@openbsd.org>
6 * Copyright (c) 2016 Andriy Voskoboinyk <avos@FreeBSD.org>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21#include <sys/cdefs.h>
22__FBSDID("$FreeBSD$");
23
24#include "opt_wlan.h"
25
26#include <sys/param.h>
27#include <sys/lock.h>
28#include <sys/mutex.h>
29#include <sys/mbuf.h>
30#include <sys/kernel.h>
31#include <sys/socket.h>
32#include <sys/systm.h>
33#include <sys/malloc.h>
34#include <sys/queue.h>
35#include <sys/taskqueue.h>
36#include <sys/bus.h>
37#include <sys/endian.h>
38#include <sys/linker.h>
39
40#include <machine/bus.h>
41#include <machine/resource.h>
42#include <sys/rman.h>
43
44#include <net/if.h>
45#include <net/ethernet.h>
46#include <net/if_media.h>
47
48#include <net80211/ieee80211_var.h>
49#include <net80211/ieee80211_radiotap.h>
50
51#include <dev/rtwn/if_rtwnvar.h>
52#include <dev/rtwn/if_rtwn_debug.h>
53
54#include <dev/rtwn/pci/rtwn_pci_var.h>
55
56#include <dev/rtwn/rtl8192c/pci/r92ce.h>
57#include <dev/rtwn/rtl8192c/pci/r92ce_reg.h>
58
59int
60r92ce_get_intr_status(struct rtwn_pci_softc *pc, int *rings)
61{
62	struct rtwn_softc *sc = &pc->pc_sc;
63	uint32_t status;
64	int ret;
65
66	*rings = 0;
67	status = rtwn_read_4(sc, R92C_HISR);
68	RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: HISR %08X, HISRE %04X\n",
69	    __func__, status, rtwn_read_2(sc, R92C_HISRE));
70	if (status == 0 || status == 0xffffffff)
71		return (0);
72
73	/* Disable interrupts. */
74	rtwn_write_4(sc, R92C_HIMR, 0);
75
76	/* Ack interrupts. */
77	rtwn_write_4(sc, R92C_HISR, status);
78
79	if (status & R92C_IMR_BDOK)
80		*rings |= (1 << RTWN_PCI_BEACON_QUEUE);
81	if (status & R92C_IMR_HIGHDOK)
82		*rings |= (1 << RTWN_PCI_HIGH_QUEUE);
83	if (status & R92C_IMR_MGNTDOK)
84		*rings |= (1 << RTWN_PCI_MGNT_QUEUE);
85	if (status & R92C_IMR_BKDOK)
86		*rings |= (1 << RTWN_PCI_BK_QUEUE);
87	if (status & R92C_IMR_BEDOK)
88		*rings |= (1 << RTWN_PCI_BE_QUEUE);
89	if (status & R92C_IMR_VIDOK)
90		*rings |= (1 << RTWN_PCI_VI_QUEUE);
91	if (status & R92C_IMR_VODOK)
92		*rings |= (1 << RTWN_PCI_VO_QUEUE);
93
94	ret = 0;
95	if (status & R92C_IMR_RXFOVW)
96		ret |= RTWN_PCI_INTR_RX_OVERFLOW;
97	if (status & R92C_IMR_RDU)
98		ret |= RTWN_PCI_INTR_RX_DESC_UNAVAIL;
99	if (status & R92C_IMR_ROK)
100		ret |= RTWN_PCI_INTR_RX_DONE;
101	if (status & R92C_IMR_TXFOVW)
102		ret |= RTWN_PCI_INTR_TX_OVERFLOW;
103	if (status & R92C_IMR_PSTIMEOUT)
104		ret |= RTWN_PCI_INTR_PS_TIMEOUT;
105
106	return (ret);
107}
108
109#define R92C_INT_ENABLE (R92C_IMR_ROK | R92C_IMR_VODOK | R92C_IMR_VIDOK | \
110			R92C_IMR_BEDOK | R92C_IMR_BKDOK | R92C_IMR_MGNTDOK | \
111			R92C_IMR_HIGHDOK | R92C_IMR_BDOK | R92C_IMR_RDU | \
112			R92C_IMR_RXFOVW)
113void
114r92ce_enable_intr(struct rtwn_pci_softc *pc)
115{
116	struct rtwn_softc *sc = &pc->pc_sc;
117
118	/* Enable interrupts. */
119	rtwn_write_4(sc, R92C_HIMR, R92C_INT_ENABLE);
120}
121
122void
123r92ce_start_xfers(struct rtwn_softc *sc)
124{
125	/* Clear pending interrupts. */
126	rtwn_write_4(sc, R92C_HISR, 0xffffffff);
127
128	/* Enable interrupts. */
129	rtwn_write_4(sc, R92C_HIMR, R92C_INT_ENABLE);
130}
131#undef R92C_INT_ENABLE
132