Commit | Line | Data |
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c066a32a TB |
1 | /* |
2 | * A20R specific code | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/interrupt.h> | |
ca4d3e67 | 13 | #include <linux/irq.h> |
c066a32a TB |
14 | #include <linux/platform_device.h> |
15 | #include <linux/serial_8250.h> | |
16 | ||
17 | #include <asm/sni.h> | |
18 | #include <asm/time.h> | |
c066a32a TB |
19 | |
20 | #define PORT(_base,_irq) \ | |
21 | { \ | |
22 | .iobase = _base, \ | |
23 | .irq = _irq, \ | |
24 | .uartclk = 1843200, \ | |
25 | .iotype = UPIO_PORT, \ | |
26 | .flags = UPF_BOOT_AUTOCONF, \ | |
27 | } | |
28 | ||
29 | static struct plat_serial8250_port a20r_data[] = { | |
30 | PORT(0x3f8, 4), | |
31 | PORT(0x2f8, 3), | |
32 | { }, | |
33 | }; | |
34 | ||
35 | static struct platform_device a20r_serial8250_device = { | |
36 | .name = "serial8250", | |
37 | .id = PLAT8250_DEV_PLATFORM, | |
38 | .dev = { | |
39 | .platform_data = a20r_data, | |
40 | }, | |
41 | }; | |
42 | ||
06cf5583 TB |
43 | static struct resource a20r_ds1216_rsrc[] = { |
44 | { | |
45 | .start = 0x1c081ffc, | |
46 | .end = 0x1c081fff, | |
47 | .flags = IORESOURCE_MEM | |
48 | } | |
49 | }; | |
50 | ||
51 | static struct platform_device a20r_ds1216_device = { | |
52 | .name = "rtc-ds1216", | |
53 | .num_resources = ARRAY_SIZE(a20r_ds1216_rsrc), | |
54 | .resource = a20r_ds1216_rsrc | |
55 | }; | |
56 | ||
c066a32a TB |
57 | static struct resource snirm_82596_rsrc[] = { |
58 | { | |
06cf5583 TB |
59 | .start = 0x18000000, |
60 | .end = 0x18000004, | |
c066a32a TB |
61 | .flags = IORESOURCE_MEM |
62 | }, | |
63 | { | |
06cf5583 TB |
64 | .start = 0x18010000, |
65 | .end = 0x18010004, | |
c066a32a TB |
66 | .flags = IORESOURCE_MEM |
67 | }, | |
68 | { | |
06cf5583 TB |
69 | .start = 0x1ff00000, |
70 | .end = 0x1ff00020, | |
c066a32a TB |
71 | .flags = IORESOURCE_MEM |
72 | }, | |
73 | { | |
74 | .start = 22, | |
75 | .end = 22, | |
76 | .flags = IORESOURCE_IRQ | |
77 | }, | |
78 | { | |
79 | .flags = 0x01 /* 16bit mpu port access */ | |
80 | } | |
81 | }; | |
82 | ||
83 | static struct platform_device snirm_82596_pdev = { | |
84 | .name = "snirm_82596", | |
85 | .num_resources = ARRAY_SIZE(snirm_82596_rsrc), | |
86 | .resource = snirm_82596_rsrc | |
87 | }; | |
88 | ||
89 | static struct resource snirm_53c710_rsrc[] = { | |
90 | { | |
9815778a TB |
91 | .start = 0x19000000, |
92 | .end = 0x190fffff, | |
c066a32a TB |
93 | .flags = IORESOURCE_MEM |
94 | }, | |
95 | { | |
96 | .start = 19, | |
97 | .end = 19, | |
98 | .flags = IORESOURCE_IRQ | |
99 | } | |
100 | }; | |
101 | ||
102 | static struct platform_device snirm_53c710_pdev = { | |
103 | .name = "snirm_53c710", | |
104 | .num_resources = ARRAY_SIZE(snirm_53c710_rsrc), | |
105 | .resource = snirm_53c710_rsrc | |
106 | }; | |
107 | ||
108 | static struct resource sc26xx_rsrc[] = { | |
109 | { | |
9815778a TB |
110 | .start = 0x1c070000, |
111 | .end = 0x1c0700ff, | |
c066a32a TB |
112 | .flags = IORESOURCE_MEM |
113 | }, | |
114 | { | |
115 | .start = 20, | |
116 | .end = 20, | |
117 | .flags = IORESOURCE_IRQ | |
118 | } | |
119 | }; | |
120 | ||
231a35d3 TB |
121 | static unsigned int sc26xx_data[2] = { |
122 | /* DTR | RTS | DSR | CTS | DCD | RI */ | |
123 | (8 << 0) | (4 << 4) | (6 << 8) | (0 << 12) | (6 << 16) | (0 << 20), | |
124 | (3 << 0) | (2 << 4) | (1 << 8) | (2 << 12) | (3 << 16) | (4 << 20) | |
125 | }; | |
126 | ||
c066a32a TB |
127 | static struct platform_device sc26xx_pdev = { |
128 | .name = "SC26xx", | |
129 | .num_resources = ARRAY_SIZE(sc26xx_rsrc), | |
231a35d3 TB |
130 | .resource = sc26xx_rsrc, |
131 | .dev = { | |
132 | .platform_data = sc26xx_data, | |
133 | } | |
c066a32a TB |
134 | }; |
135 | ||
be282059 AS |
136 | #warning "Please try migrate to use new driver SCCNXP and report the status" \ |
137 | "in the linux-serial mailing list." | |
138 | ||
139 | /* The code bellow is a replacement of SC26XX to SCCNXP */ | |
140 | #if 0 | |
141 | #include <linux/platform_data/sccnxp.h> | |
142 | ||
143 | static struct sccnxp_pdata sccnxp_data = { | |
144 | .reg_shift = 2, | |
145 | .frequency = 3686400, | |
146 | .mctrl_cfg[0] = MCTRL_SIG(DTR_OP, LINE_OP7) | | |
147 | MCTRL_SIG(RTS_OP, LINE_OP3) | | |
148 | MCTRL_SIG(DSR_IP, LINE_IP5) | | |
149 | MCTRL_SIG(DCD_IP, LINE_IP6), | |
150 | .mctrl_cfg[1] = MCTRL_SIG(DTR_OP, LINE_OP2) | | |
151 | MCTRL_SIG(RTS_OP, LINE_OP1) | | |
152 | MCTRL_SIG(DSR_IP, LINE_IP0) | | |
153 | MCTRL_SIG(CTS_IP, LINE_IP1) | | |
154 | MCTRL_SIG(DCD_IP, LINE_IP2) | | |
155 | MCTRL_SIG(RNG_IP, LINE_IP3), | |
156 | }; | |
157 | ||
158 | static struct platform_device sc2681_pdev = { | |
159 | .name = "sc2681", | |
160 | .resource = sc2xxx_rsrc, | |
161 | .num_resources = ARRAY_SIZE(sc2xxx_rsrc), | |
162 | .dev = { | |
163 | .platform_data = &sccnxp_data, | |
164 | }, | |
165 | }; | |
166 | #endif | |
167 | ||
c066a32a TB |
168 | static u32 a20r_ack_hwint(void) |
169 | { | |
170 | u32 status = read_c0_status(); | |
171 | ||
49a89efb | 172 | write_c0_status(status | 0x00010000); |
c066a32a TB |
173 | asm volatile( |
174 | " .set push \n" | |
175 | " .set noat \n" | |
176 | " .set noreorder \n" | |
177 | " lw $1, 0(%0) \n" | |
178 | " sb $0, 0(%1) \n" | |
179 | " sync \n" | |
180 | " lb %1, 0(%1) \n" | |
181 | " b 1f \n" | |
182 | " ori %1, $1, 2 \n" | |
183 | " .align 8 \n" | |
184 | "1: \n" | |
185 | " nop \n" | |
186 | " sw %1, 0(%0) \n" | |
187 | " sync \n" | |
188 | " li %1, 0x20 \n" | |
189 | "2: \n" | |
190 | " nop \n" | |
191 | " bnez %1,2b \n" | |
192 | " addiu %1, -1 \n" | |
193 | " sw $1, 0(%0) \n" | |
194 | " sync \n" | |
195 | ".set pop \n" | |
196 | : | |
197 | : "Jr" (PCIMT_UCONF), "Jr" (0xbc000000)); | |
198 | write_c0_status(status); | |
199 | ||
200 | return status; | |
201 | } | |
202 | ||
0b888c7f | 203 | static inline void unmask_a20r_irq(struct irq_data *d) |
c066a32a | 204 | { |
0b888c7f | 205 | set_c0_status(0x100 << (d->irq - SNI_A20R_IRQ_BASE)); |
c066a32a TB |
206 | irq_enable_hazard(); |
207 | } | |
208 | ||
0b888c7f | 209 | static inline void mask_a20r_irq(struct irq_data *d) |
c066a32a | 210 | { |
0b888c7f | 211 | clear_c0_status(0x100 << (d->irq - SNI_A20R_IRQ_BASE)); |
c066a32a TB |
212 | irq_disable_hazard(); |
213 | } | |
214 | ||
c066a32a | 215 | static struct irq_chip a20r_irq_type = { |
8922f79e | 216 | .name = "A20R", |
0b888c7f TG |
217 | .irq_mask = mask_a20r_irq, |
218 | .irq_unmask = unmask_a20r_irq, | |
c066a32a TB |
219 | }; |
220 | ||
221 | /* | |
222 | * hwint 0 receive all interrupts | |
223 | */ | |
224 | static void a20r_hwint(void) | |
225 | { | |
226 | u32 cause, status; | |
227 | int irq; | |
228 | ||
49a89efb | 229 | clear_c0_status(IE_IRQ0); |
c066a32a TB |
230 | status = a20r_ack_hwint(); |
231 | cause = read_c0_cause(); | |
232 | ||
233 | irq = ffs(((cause & status) >> 8) & 0xf8); | |
234 | if (likely(irq > 0)) | |
235 | do_IRQ(SNI_A20R_IRQ_BASE + irq - 1); | |
236 | set_c0_status(IE_IRQ0); | |
237 | } | |
238 | ||
239 | void __init sni_a20r_irq_init(void) | |
240 | { | |
241 | int i; | |
242 | ||
243 | for (i = SNI_A20R_IRQ_BASE + 2 ; i < SNI_A20R_IRQ_BASE + 8; i++) | |
e4ec7989 | 244 | irq_set_chip_and_handler(i, &a20r_irq_type, handle_level_irq); |
c066a32a TB |
245 | sni_hwint = a20r_hwint; |
246 | change_c0_status(ST0_IM, IE_IRQ0); | |
49a89efb | 247 | setup_irq(SNI_A20R_IRQ_BASE + 3, &sni_isa_irq); |
c066a32a TB |
248 | } |
249 | ||
250 | void sni_a20r_init(void) | |
251 | { | |
06cf5583 | 252 | /* FIXME, remove if not needed */ |
c066a32a TB |
253 | } |
254 | ||
255 | static int __init snirm_a20r_setup_devinit(void) | |
256 | { | |
257 | switch (sni_brd_type) { | |
258 | case SNI_BRD_TOWER_OASIC: | |
259 | case SNI_BRD_MINITOWER: | |
260 | platform_device_register(&snirm_82596_pdev); | |
261 | platform_device_register(&snirm_53c710_pdev); | |
262 | platform_device_register(&sc26xx_pdev); | |
263 | platform_device_register(&a20r_serial8250_device); | |
06cf5583 | 264 | platform_device_register(&a20r_ds1216_device); |
231a35d3 | 265 | sni_eisa_root_init(); |
c066a32a TB |
266 | break; |
267 | } | |
c066a32a TB |
268 | return 0; |
269 | } | |
270 | ||
271 | device_initcall(snirm_a20r_setup_devinit); |