1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * arch/sh64/mach-cayman/setup.c
7 *
8 * SH5 Cayman support
9 *
10 * This file handles the architecture-dependent parts of initialization
11 *
12 * Copyright David J. Mckay.
13 * Needs major work!
14 *
15 * benedict.gaster@superh.com: 3rd May 2002
16 * Added support for ramdisk, removing statically linked romfs at the same time.
17 *
18 * lethal@linux-sh.org: 15th May 2003
19 * Use the generic procfs cpuinfo interface, just return a valid board name.
20 */
21
22 #include <linux/stddef.h>
23 #include <linux/init.h>
24 #include <linux/config.h>
25 #include <linux/mm.h>
26 #include <linux/bootmem.h>
27 #include <linux/delay.h>
28 #include <linux/kernel.h>
29 #include <linux/seq_file.h>
30 #include <asm/processor.h>
31 #include <asm/platform.h>
32 #include <asm/io.h>
33 #include <asm/irq.h>
34 #include <asm/page.h>
35
36 #define RES_COUNT(res) ((sizeof((res))/sizeof(struct resource)))
37
38 /*
39 * Platform Dependent Interrupt Priorities.
40 */
41
42 /* Using defaults defined in irq.h */
43 #define RES NO_PRIORITY /* Disabled */
44 #define IR0 IRL0_PRIORITY /* IRLs */
45 #define IR1 IRL1_PRIORITY
46 #define IR2 IRL2_PRIORITY
47 #define IR3 IRL3_PRIORITY
48 #define PCA INTA_PRIORITY /* PCI Ints */
49 #define PCB INTB_PRIORITY
50 #define PCC INTC_PRIORITY
51 #define PCD INTD_PRIORITY
52 #define SER TOP_PRIORITY
53 #define ERR TOP_PRIORITY
54 #define PW0 TOP_PRIORITY
55 #define PW1 TOP_PRIORITY
56 #define PW2 TOP_PRIORITY
57 #define PW3 TOP_PRIORITY
58 #define DM0 NO_PRIORITY /* DMA Ints */
59 #define DM1 NO_PRIORITY
60 #define DM2 NO_PRIORITY
61 #define DM3 NO_PRIORITY
62 #define DAE NO_PRIORITY
63 #define TU0 TIMER_PRIORITY /* TMU Ints */
64 #define TU1 NO_PRIORITY
65 #define TU2 NO_PRIORITY
66 #define TI2 NO_PRIORITY
67 #define ATI NO_PRIORITY /* RTC Ints */
68 #define PRI NO_PRIORITY
69 #define CUI RTC_PRIORITY
70 #define ERI SCIF_PRIORITY /* SCIF Ints */
71 #define RXI SCIF_PRIORITY
72 #define BRI SCIF_PRIORITY
73 #define TXI SCIF_PRIORITY
74 #define ITI TOP_PRIORITY /* WDT Ints */
75
76 /* Setup for the SMSC FDC37C935 */
77 #define SMSC_SUPERIO_BASE 0x04000000
78 #define SMSC_CONFIG_PORT_ADDR 0x3f0
79 #define SMSC_INDEX_PORT_ADDR SMSC_CONFIG_PORT_ADDR
80 #define SMSC_DATA_PORT_ADDR 0x3f1
81
82 #define SMSC_ENTER_CONFIG_KEY 0x55
83 #define SMSC_EXIT_CONFIG_KEY 0xaa
84
85 #define SMCS_LOGICAL_DEV_INDEX 0x07
86 #define SMSC_DEVICE_ID_INDEX 0x20
87 #define SMSC_DEVICE_REV_INDEX 0x21
88 #define SMSC_ACTIVATE_INDEX 0x30
89 #define SMSC_PRIMARY_INT_INDEX 0x70
90 #define SMSC_SECONDARY_INT_INDEX 0x72
91
92 #define SMSC_KEYBOARD_DEVICE 7
93
94 #define SMSC_SUPERIO_READ_INDEXED(index) ({ \
95 outb((index), SMSC_INDEX_PORT_ADDR); \
96 inb(SMSC_DATA_PORT_ADDR); })
97 #define SMSC_SUPERIO_WRITE_INDEXED(val, index) ({ \
98 outb((index), SMSC_INDEX_PORT_ADDR); \
99 outb((val), SMSC_DATA_PORT_ADDR); })
100
101 unsigned long smsc_superio_virt;
102
103 /*
104 * Platform dependent structures: maps and parms block.
105 */
106 struct resource io_resources[] = {
107 /* To be updated with external devices */
108 };
109
110 struct resource kram_resources[] = {
111 { "Kernel code", 0, 0 }, /* These must be last in the array */
112 { "Kernel data", 0, 0 } /* These must be last in the array */
113 };
114
115 struct resource xram_resources[] = {
116 /* To be updated with external devices */
117 };
118
119 struct resource rom_resources[] = {
120 /* To be updated with external devices */
121 };
122
123 struct sh64_platform platform_parms = {
124 .readonly_rootfs = 1,
125 .initial_root_dev = 0x0100,
126 .loader_type = 1,
127 .io_res_p = io_resources,
128 .io_res_count = RES_COUNT(io_resources),
129 .kram_res_p = kram_resources,
130 .kram_res_count = RES_COUNT(kram_resources),
131 .xram_res_p = xram_resources,
132 .xram_res_count = RES_COUNT(xram_resources),
133 .rom_res_p = rom_resources,
134 .rom_res_count = RES_COUNT(rom_resources),
135 };
136
137 int platform_int_priority[NR_INTC_IRQS] = {
138 IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ 0- 7 */
139 RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ 8-15 */
140 PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */
141 RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */
142 TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */
143 RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */
144 RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */
145 RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */
146 };
147
smsc_superio_setup(void)148 static int __init smsc_superio_setup(void)
149 {
150 unsigned char devid, devrev;
151
152 smsc_superio_virt = onchip_remap(SMSC_SUPERIO_BASE, 1024, "SMSC SuperIO");
153 if (!smsc_superio_virt) {
154 panic("Unable to remap SMSC SuperIO\n");
155 }
156
157 /* Initially the chip is in run state */
158 /* Put it into configuration state */
159 outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
160 outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
161
162 /* Read device ID info */
163 devid = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_ID_INDEX);
164 devrev = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_REV_INDEX);
165 printk("SMSC SuperIO devid %02x rev %02x\n", devid, devrev);
166
167 /* Select the keyboard device */
168 SMSC_SUPERIO_WRITE_INDEXED(SMSC_KEYBOARD_DEVICE, SMCS_LOGICAL_DEV_INDEX);
169
170 /* enable it */
171 SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX);
172
173 /* Select the interrupts */
174 /* On a PC keyboard is IRQ1, mouse is IRQ12 */
175 SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_PRIMARY_INT_INDEX);
176 SMSC_SUPERIO_WRITE_INDEXED(12, SMSC_SECONDARY_INT_INDEX);
177
178 /* Exit the configuraton state */
179 outb(SMSC_EXIT_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR);
180
181 return 0;
182 }
183
184 /* This is grotty, but, because kernel is always referenced on the link line
185 * before any devices, this is safe.
186 */
187 __initcall(smsc_superio_setup);
188
platform_setup(void)189 void __init platform_setup(void)
190 {
191 /* Cayman platform leaves the decision to head.S, for now */
192 platform_parms.fpu_flags = fpu_in_use;
193 }
194
platform_monitor(void)195 void __init platform_monitor(void)
196 {
197 /* Nothing yet .. */
198 }
199
platform_reserve(void)200 void __init platform_reserve(void)
201 {
202 /* Nothing yet .. */
203 }
204
get_system_type(void)205 const char *get_system_type(void)
206 {
207 return "Hitachi Cayman";
208 }
209
210