1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | Mantis PCI bridge driver |
4 | |
5 | Copyright (C) Manu Abraham (abraham.manu@gmail.com) |
6 | |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/signal.h> |
11 | #include <linux/sched.h> |
12 | |
13 | #include <linux/interrupt.h> |
14 | #include <asm/io.h> |
15 | |
16 | #include <media/dmxdev.h> |
17 | #include <media/dvbdev.h> |
18 | #include <media/dvb_demux.h> |
19 | #include <media/dvb_frontend.h> |
20 | #include <media/dvb_net.h> |
21 | |
22 | #include "mantis_common.h" |
23 | |
24 | #include "mantis_hif.h" |
25 | #include "mantis_link.h" /* temporary due to physical layer stuff */ |
26 | |
27 | #include "mantis_reg.h" |
28 | |
29 | |
30 | static int mantis_hif_sbuf_opdone_wait(struct mantis_ca *ca) |
31 | { |
32 | struct mantis_pci *mantis = ca->ca_priv; |
33 | int rc = 0; |
34 | |
35 | if (wait_event_timeout(ca->hif_opdone_wq, |
36 | ca->hif_event & MANTIS_SBUF_OPDONE, |
37 | msecs_to_jiffies(500)) == -ERESTARTSYS) { |
38 | |
39 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Smart buffer operation timeout !" , mantis->num); |
40 | rc = -EREMOTEIO; |
41 | } |
42 | dprintk(MANTIS_DEBUG, 1, "Smart Buffer Operation complete" ); |
43 | ca->hif_event &= ~MANTIS_SBUF_OPDONE; |
44 | return rc; |
45 | } |
46 | |
47 | static int mantis_hif_write_wait(struct mantis_ca *ca) |
48 | { |
49 | struct mantis_pci *mantis = ca->ca_priv; |
50 | u32 opdone = 0, timeout = 0; |
51 | int rc = 0; |
52 | |
53 | if (wait_event_timeout(ca->hif_write_wq, |
54 | mantis->gpif_status & MANTIS_GPIF_WRACK, |
55 | msecs_to_jiffies(500)) == -ERESTARTSYS) { |
56 | |
57 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Write ACK timed out !" , mantis->num); |
58 | rc = -EREMOTEIO; |
59 | } |
60 | dprintk(MANTIS_DEBUG, 1, "Write Acknowledged" ); |
61 | mantis->gpif_status &= ~MANTIS_GPIF_WRACK; |
62 | while (!opdone) { |
63 | opdone = (mmread(MANTIS_GPIF_STATUS) & MANTIS_SBUF_OPDONE); |
64 | udelay(500); |
65 | timeout++; |
66 | if (timeout > 100) { |
67 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Write operation timed out!" , mantis->num); |
68 | rc = -ETIMEDOUT; |
69 | break; |
70 | } |
71 | } |
72 | dprintk(MANTIS_DEBUG, 1, "HIF Write success" ); |
73 | return rc; |
74 | } |
75 | |
76 | |
77 | int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr) |
78 | { |
79 | struct mantis_pci *mantis = ca->ca_priv; |
80 | u32 hif_addr = 0, data, count = 4; |
81 | |
82 | dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read" , mantis->num); |
83 | mutex_lock(&ca->ca_lock); |
84 | hif_addr &= ~MANTIS_GPIF_PCMCIAREG; |
85 | hif_addr &= ~MANTIS_GPIF_PCMCIAIOM; |
86 | hif_addr |= MANTIS_HIF_STATUS; |
87 | hif_addr |= addr; |
88 | |
89 | mmwrite(hif_addr, MANTIS_GPIF_BRADDR); |
90 | mmwrite(count, MANTIS_GPIF_BRBYTES); |
91 | udelay(20); |
92 | mmwrite(hif_addr | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR); |
93 | |
94 | if (mantis_hif_sbuf_opdone_wait(ca) != 0) { |
95 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed" , mantis->num); |
96 | mutex_unlock(lock: &ca->ca_lock); |
97 | return -EREMOTEIO; |
98 | } |
99 | data = mmread(MANTIS_GPIF_DIN); |
100 | mutex_unlock(lock: &ca->ca_lock); |
101 | dprintk(MANTIS_DEBUG, 1, "Mem Read: 0x%02x" , data); |
102 | return (data >> 24) & 0xff; |
103 | } |
104 | |
105 | int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data) |
106 | { |
107 | struct mantis_slot *slot = ca->slot; |
108 | struct mantis_pci *mantis = ca->ca_priv; |
109 | u32 hif_addr = 0; |
110 | |
111 | dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write" , mantis->num); |
112 | mutex_lock(&ca->ca_lock); |
113 | hif_addr &= ~MANTIS_GPIF_HIFRDWRN; |
114 | hif_addr &= ~MANTIS_GPIF_PCMCIAREG; |
115 | hif_addr &= ~MANTIS_GPIF_PCMCIAIOM; |
116 | hif_addr |= MANTIS_HIF_STATUS; |
117 | hif_addr |= addr; |
118 | |
119 | mmwrite(slot->slave_cfg, MANTIS_GPIF_CFGSLA); /* Slot0 alone for now */ |
120 | mmwrite(hif_addr, MANTIS_GPIF_ADDR); |
121 | mmwrite(data, MANTIS_GPIF_DOUT); |
122 | |
123 | if (mantis_hif_write_wait(ca) != 0) { |
124 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed" , mantis->num); |
125 | mutex_unlock(lock: &ca->ca_lock); |
126 | return -EREMOTEIO; |
127 | } |
128 | dprintk(MANTIS_DEBUG, 1, "Mem Write: (0x%02x to 0x%02x)" , data, addr); |
129 | mutex_unlock(lock: &ca->ca_lock); |
130 | |
131 | return 0; |
132 | } |
133 | |
134 | int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr) |
135 | { |
136 | struct mantis_pci *mantis = ca->ca_priv; |
137 | u32 data, hif_addr = 0; |
138 | |
139 | dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read" , mantis->num); |
140 | mutex_lock(&ca->ca_lock); |
141 | hif_addr &= ~MANTIS_GPIF_PCMCIAREG; |
142 | hif_addr |= MANTIS_GPIF_PCMCIAIOM; |
143 | hif_addr |= MANTIS_HIF_STATUS; |
144 | hif_addr |= addr; |
145 | |
146 | mmwrite(hif_addr, MANTIS_GPIF_BRADDR); |
147 | mmwrite(1, MANTIS_GPIF_BRBYTES); |
148 | udelay(20); |
149 | mmwrite(hif_addr | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR); |
150 | |
151 | if (mantis_hif_sbuf_opdone_wait(ca) != 0) { |
152 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed" , mantis->num); |
153 | mutex_unlock(lock: &ca->ca_lock); |
154 | return -EREMOTEIO; |
155 | } |
156 | data = mmread(MANTIS_GPIF_DIN); |
157 | dprintk(MANTIS_DEBUG, 1, "I/O Read: 0x%02x" , data); |
158 | udelay(50); |
159 | mutex_unlock(lock: &ca->ca_lock); |
160 | |
161 | return (u8) data; |
162 | } |
163 | |
164 | int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data) |
165 | { |
166 | struct mantis_pci *mantis = ca->ca_priv; |
167 | u32 hif_addr = 0; |
168 | |
169 | dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write" , mantis->num); |
170 | mutex_lock(&ca->ca_lock); |
171 | hif_addr &= ~MANTIS_GPIF_PCMCIAREG; |
172 | hif_addr &= ~MANTIS_GPIF_HIFRDWRN; |
173 | hif_addr |= MANTIS_GPIF_PCMCIAIOM; |
174 | hif_addr |= MANTIS_HIF_STATUS; |
175 | hif_addr |= addr; |
176 | |
177 | mmwrite(hif_addr, MANTIS_GPIF_ADDR); |
178 | mmwrite(data, MANTIS_GPIF_DOUT); |
179 | |
180 | if (mantis_hif_write_wait(ca) != 0) { |
181 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed" , mantis->num); |
182 | mutex_unlock(lock: &ca->ca_lock); |
183 | return -EREMOTEIO; |
184 | } |
185 | dprintk(MANTIS_DEBUG, 1, "I/O Write: (0x%02x to 0x%02x)" , data, addr); |
186 | mutex_unlock(lock: &ca->ca_lock); |
187 | udelay(50); |
188 | |
189 | return 0; |
190 | } |
191 | |
192 | int mantis_hif_init(struct mantis_ca *ca) |
193 | { |
194 | struct mantis_slot *slot = ca->slot; |
195 | struct mantis_pci *mantis = ca->ca_priv; |
196 | u32 irqcfg; |
197 | |
198 | slot[0].slave_cfg = 0x70773028; |
199 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface" , mantis->num); |
200 | |
201 | mutex_lock(&ca->ca_lock); |
202 | irqcfg = mmread(MANTIS_GPIF_IRQCFG); |
203 | irqcfg = MANTIS_MASK_BRRDY | |
204 | MANTIS_MASK_WRACK | |
205 | MANTIS_MASK_EXTIRQ | |
206 | MANTIS_MASK_WSTO | |
207 | MANTIS_MASK_OTHERR | |
208 | MANTIS_MASK_OVFLW; |
209 | |
210 | mmwrite(irqcfg, MANTIS_GPIF_IRQCFG); |
211 | mutex_unlock(lock: &ca->ca_lock); |
212 | |
213 | return 0; |
214 | } |
215 | |
216 | void mantis_hif_exit(struct mantis_ca *ca) |
217 | { |
218 | struct mantis_pci *mantis = ca->ca_priv; |
219 | u32 irqcfg; |
220 | |
221 | dprintk(MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface" , mantis->num); |
222 | mutex_lock(&ca->ca_lock); |
223 | irqcfg = mmread(MANTIS_GPIF_IRQCFG); |
224 | irqcfg &= ~MANTIS_MASK_BRRDY; |
225 | mmwrite(irqcfg, MANTIS_GPIF_IRQCFG); |
226 | mutex_unlock(lock: &ca->ca_lock); |
227 | } |
228 | |