diff options
author | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2006-12-28 12:22:32 -0500 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2007-02-18 16:31:37 -0500 |
commit | c066a32a890c50ce59e91f8cea8eb5fd8d5821b9 (patch) | |
tree | d129af235d11d44c649f0743bc38535c3a229e41 /arch/mips/sni/a20r.c | |
parent | 5759906ca9e5201c3fd40d61c861ec1e441d3a24 (diff) |
[MIPS] Support for several more SNI RM models.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/sni/a20r.c')
-rw-r--r-- | arch/mips/sni/a20r.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c new file mode 100644 index 000000000000..31ab80f1befa --- /dev/null +++ b/arch/mips/sni/a20r.c | |||
@@ -0,0 +1,227 @@ | |||
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> | ||
13 | #include <linux/platform_device.h> | ||
14 | #include <linux/serial_8250.h> | ||
15 | |||
16 | #include <asm/sni.h> | ||
17 | #include <asm/time.h> | ||
18 | #include <asm/ds1216.h> | ||
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 | |||
43 | static struct resource snirm_82596_rsrc[] = { | ||
44 | { | ||
45 | .start = 0xb8000000, | ||
46 | .end = 0xb8000004, | ||
47 | .flags = IORESOURCE_MEM | ||
48 | }, | ||
49 | { | ||
50 | .start = 0xb8010000, | ||
51 | .end = 0xb8010004, | ||
52 | .flags = IORESOURCE_MEM | ||
53 | }, | ||
54 | { | ||
55 | .start = 0xbff00000, | ||
56 | .end = 0xbff00020, | ||
57 | .flags = IORESOURCE_MEM | ||
58 | }, | ||
59 | { | ||
60 | .start = 22, | ||
61 | .end = 22, | ||
62 | .flags = IORESOURCE_IRQ | ||
63 | }, | ||
64 | { | ||
65 | .flags = 0x01 /* 16bit mpu port access */ | ||
66 | } | ||
67 | }; | ||
68 | |||
69 | static struct platform_device snirm_82596_pdev = { | ||
70 | .name = "snirm_82596", | ||
71 | .num_resources = ARRAY_SIZE(snirm_82596_rsrc), | ||
72 | .resource = snirm_82596_rsrc | ||
73 | }; | ||
74 | |||
75 | static struct resource snirm_53c710_rsrc[] = { | ||
76 | { | ||
77 | .start = 0xb9000000, | ||
78 | .end = 0xb90fffff, | ||
79 | .flags = IORESOURCE_MEM | ||
80 | }, | ||
81 | { | ||
82 | .start = 19, | ||
83 | .end = 19, | ||
84 | .flags = IORESOURCE_IRQ | ||
85 | } | ||
86 | }; | ||
87 | |||
88 | static struct platform_device snirm_53c710_pdev = { | ||
89 | .name = "snirm_53c710", | ||
90 | .num_resources = ARRAY_SIZE(snirm_53c710_rsrc), | ||
91 | .resource = snirm_53c710_rsrc | ||
92 | }; | ||
93 | |||
94 | static struct resource sc26xx_rsrc[] = { | ||
95 | { | ||
96 | .start = 0xbc070000, | ||
97 | .end = 0xbc0700ff, | ||
98 | .flags = IORESOURCE_MEM | ||
99 | }, | ||
100 | { | ||
101 | .start = 20, | ||
102 | .end = 20, | ||
103 | .flags = IORESOURCE_IRQ | ||
104 | } | ||
105 | }; | ||
106 | |||
107 | static struct platform_device sc26xx_pdev = { | ||
108 | .name = "SC26xx", | ||
109 | .num_resources = ARRAY_SIZE(sc26xx_rsrc), | ||
110 | .resource = sc26xx_rsrc | ||
111 | }; | ||
112 | |||
113 | static u32 a20r_ack_hwint(void) | ||
114 | { | ||
115 | u32 status = read_c0_status(); | ||
116 | |||
117 | write_c0_status (status | 0x00010000); | ||
118 | asm volatile( | ||
119 | " .set push \n" | ||
120 | " .set noat \n" | ||
121 | " .set noreorder \n" | ||
122 | " lw $1, 0(%0) \n" | ||
123 | " sb $0, 0(%1) \n" | ||
124 | " sync \n" | ||
125 | " lb %1, 0(%1) \n" | ||
126 | " b 1f \n" | ||
127 | " ori %1, $1, 2 \n" | ||
128 | " .align 8 \n" | ||
129 | "1: \n" | ||
130 | " nop \n" | ||
131 | " sw %1, 0(%0) \n" | ||
132 | " sync \n" | ||
133 | " li %1, 0x20 \n" | ||
134 | "2: \n" | ||
135 | " nop \n" | ||
136 | " bnez %1,2b \n" | ||
137 | " addiu %1, -1 \n" | ||
138 | " sw $1, 0(%0) \n" | ||
139 | " sync \n" | ||
140 | ".set pop \n" | ||
141 | : | ||
142 | : "Jr" (PCIMT_UCONF), "Jr" (0xbc000000)); | ||
143 | write_c0_status(status); | ||
144 | |||
145 | return status; | ||
146 | } | ||
147 | |||
148 | static inline void unmask_a20r_irq(unsigned int irq) | ||
149 | { | ||
150 | set_c0_status(0x100 << (irq - SNI_A20R_IRQ_BASE)); | ||
151 | irq_enable_hazard(); | ||
152 | } | ||
153 | |||
154 | static inline void mask_a20r_irq(unsigned int irq) | ||
155 | { | ||
156 | clear_c0_status(0x100 << (irq - SNI_A20R_IRQ_BASE)); | ||
157 | irq_disable_hazard(); | ||
158 | } | ||
159 | |||
160 | static void end_a20r_irq(unsigned int irq) | ||
161 | { | ||
162 | if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { | ||
163 | a20r_ack_hwint(); | ||
164 | unmask_a20r_irq(irq); | ||
165 | } | ||
166 | } | ||
167 | |||
168 | static struct irq_chip a20r_irq_type = { | ||
169 | .typename = "A20R", | ||
170 | .ack = mask_a20r_irq, | ||
171 | .mask = mask_a20r_irq, | ||
172 | .mask_ack = mask_a20r_irq, | ||
173 | .unmask = unmask_a20r_irq, | ||
174 | .end = end_a20r_irq, | ||
175 | }; | ||
176 | |||
177 | /* | ||
178 | * hwint 0 receive all interrupts | ||
179 | */ | ||
180 | static void a20r_hwint(void) | ||
181 | { | ||
182 | u32 cause, status; | ||
183 | int irq; | ||
184 | |||
185 | clear_c0_status (IE_IRQ0); | ||
186 | status = a20r_ack_hwint(); | ||
187 | cause = read_c0_cause(); | ||
188 | |||
189 | irq = ffs(((cause & status) >> 8) & 0xf8); | ||
190 | if (likely(irq > 0)) | ||
191 | do_IRQ(SNI_A20R_IRQ_BASE + irq - 1); | ||
192 | set_c0_status(IE_IRQ0); | ||
193 | } | ||
194 | |||
195 | void __init sni_a20r_irq_init(void) | ||
196 | { | ||
197 | int i; | ||
198 | |||
199 | for (i = SNI_A20R_IRQ_BASE + 2 ; i < SNI_A20R_IRQ_BASE + 8; i++) | ||
200 | set_irq_chip(i, &a20r_irq_type); | ||
201 | sni_hwint = a20r_hwint; | ||
202 | change_c0_status(ST0_IM, IE_IRQ0); | ||
203 | setup_irq (SNI_A20R_IRQ_BASE + 3, &sni_isa_irq); | ||
204 | } | ||
205 | |||
206 | void sni_a20r_init(void) | ||
207 | { | ||
208 | ds1216_base = (volatile unsigned char *) SNI_DS1216_A20R_BASE; | ||
209 | rtc_mips_get_time = ds1216_get_cmos_time; | ||
210 | } | ||
211 | |||
212 | static int __init snirm_a20r_setup_devinit(void) | ||
213 | { | ||
214 | switch (sni_brd_type) { | ||
215 | case SNI_BRD_TOWER_OASIC: | ||
216 | case SNI_BRD_MINITOWER: | ||
217 | platform_device_register(&snirm_82596_pdev); | ||
218 | platform_device_register(&snirm_53c710_pdev); | ||
219 | platform_device_register(&sc26xx_pdev); | ||
220 | platform_device_register(&a20r_serial8250_device); | ||
221 | break; | ||
222 | } | ||
223 | |||
224 | return 0; | ||
225 | } | ||
226 | |||
227 | device_initcall(snirm_a20r_setup_devinit); | ||