1/*-
2 * Copyright (c) 2017 Farhan Khan <khanzf@gmail.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <sys/cdefs.h>
18__FBSDID("$FreeBSD$");
19
20#include "opt_wlan.h"
21
22#include <sys/param.h>
23#include <sys/lock.h>
24#include <sys/mutex.h>
25#include <sys/mbuf.h>
26#include <sys/kernel.h>
27#include <sys/socket.h>
28#include <sys/systm.h>
29#include <sys/malloc.h>
30#include <sys/queue.h>
31#include <sys/taskqueue.h>
32#include <sys/bus.h>
33#include <sys/endian.h>
34#include <sys/linker.h>
35
36#include <machine/bus.h>
37#include <machine/resource.h>
38#include <sys/rman.h>
39
40#include <net/if.h>
41#include <net/ethernet.h>
42#include <net/if_media.h>
43
44#include <net80211/ieee80211_var.h>
45#include <net80211/ieee80211_radiotap.h>
46
47#include <dev/rtwn/if_rtwnvar.h>
48#include <dev/rtwn/if_rtwn_debug.h>
49
50#include <dev/rtwn/pci/rtwn_pci_var.h>
51
52#include <dev/rtwn/rtl8188e/pci/r88ee.h>
53#include <dev/rtwn/rtl8188e/pci/r88ee_reg.h>
54
55int
56r88ee_get_intr_status(struct rtwn_pci_softc *pc, int *rings)
57{
58	struct rtwn_softc *sc = &pc->pc_sc;
59	uint32_t status, status_ex;
60	int ret;
61
62	*rings = 0;
63	status = rtwn_read_4(sc, R88E_HISR);
64	status_ex = rtwn_read_4(sc, R88E_HISRE);
65	RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: HISR %08X, HISRE %08X\n",
66	    __func__, status, status_ex);
67	if ((status == 0 || status == 0xffffffff) &&
68	    (status_ex == 0 || status_ex == 0xffffffff))
69		return (0);
70
71	/* Disable interrupts */
72	rtwn_write_4(sc, R88E_HIMR, 0);
73	rtwn_write_4(sc, R88E_HIMRE, 0);
74
75	/* Ack interrupts */
76	rtwn_write_4(sc, R88E_HISR, status);
77	rtwn_write_4(sc, R88E_HISRE, status_ex);
78
79	if (status & R88E_HIMR_HIGHDOK)
80		*rings |= (1 << RTWN_PCI_HIGH_QUEUE);
81	if (status & R88E_HIMR_MGNTDOK)
82		*rings |= (1 << RTWN_PCI_MGNT_QUEUE);
83	if (status & R88E_HIMR_BKDOK)
84		*rings |= (1 << RTWN_PCI_BK_QUEUE);
85	if (status & R88E_HIMR_BEDOK)
86		*rings |= (1 << RTWN_PCI_BE_QUEUE);
87	if (status & R88E_HIMR_VIDOK)
88		*rings |= (1 << RTWN_PCI_VI_QUEUE);
89	if (status & R88E_HIMR_VODOK)
90		*rings |= (1 << RTWN_PCI_VO_QUEUE);
91
92	ret = 0;
93	if (status_ex & R88E_HIMRE_RXERR)
94		ret |= RTWN_PCI_INTR_RX_ERROR;
95	if (status_ex & R88E_HIMRE_RXFOVW)
96		ret |= RTWN_PCI_INTR_RX_OVERFLOW;
97	if (status & R88E_HIMR_RDU)
98		ret |= RTWN_PCI_INTR_RX_DESC_UNAVAIL;
99	if (status & R88E_HIMR_ROK)
100		ret |= RTWN_PCI_INTR_RX_DONE;
101	if (status_ex & R88E_HIMRE_TXERR)
102		ret |= RTWN_PCI_INTR_TX_ERROR;
103	if (status_ex & R88E_HIMRE_TXFOVW)
104		ret |= RTWN_PCI_INTR_TX_OVERFLOW;
105	if (status & R88E_HIMR_TXRPT)
106		ret |= RTWN_PCI_INTR_TX_REPORT;
107	if (status & R88E_HIMR_PSTIMEOUT)
108		ret |= RTWN_PCI_INTR_PS_TIMEOUT;
109
110	return (ret);
111}
112
113#define	R88E_INT_ENABLE	(R88E_HIMR_ROK | R88E_HIMR_RDU | R88E_HIMR_VODOK | \
114			 R88E_HIMR_VIDOK | R88E_HIMR_BEDOK | \
115			 R88E_HIMR_BKDOK | R88E_HIMR_MGNTDOK | \
116			 R88E_HIMR_HIGHDOK | R88E_HIMR_TXRPT)
117
118#define	R88E_INT_ENABLE_EX	(R88E_HIMRE_RXFOVW | R88E_HIMRE_RXERR)
119
120void
121r88ee_enable_intr(struct rtwn_pci_softc *pc)
122{
123	struct rtwn_softc *sc = &pc->pc_sc;
124
125	/* Enable interrupts */
126	rtwn_write_4(sc, R88E_HIMR, R88E_INT_ENABLE);
127	rtwn_write_4(sc, R88E_HIMRE, R88E_INT_ENABLE_EX);
128}
129
130void
131r88ee_start_xfers(struct rtwn_softc *sc)
132{
133	/* Clear pending interrupts. */
134	rtwn_write_4(sc, R88E_HISR, 0xffffffff);
135	rtwn_write_4(sc, R88E_HISRE, 0xffffffff);
136
137	/* Enable interrupts. */
138	rtwn_write_4(sc, R88E_HIMR, R88E_INT_ENABLE);
139	rtwn_write_4(sc, R88E_HIMRE, R88E_INT_ENABLE_EX);
140}
141
142#undef R88E_INT_ENABLE
143#undef R88E_INT_ENABLE_EX
144