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1da177e4 LT |
1 | /* |
2 | * arch/v850/kernel/anna.c -- Anna V850E2 evaluation chip/board | |
3 | * | |
4 | * Copyright (C) 2002,03 NEC Electronics Corporation | |
5 | * Copyright (C) 2002,03 Miles Bader <miles@gnu.org> | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General | |
8 | * Public License. See the file COPYING in the main directory of this | |
9 | * archive for more details. | |
10 | * | |
11 | * Written by Miles Bader <miles@gnu.org> | |
12 | */ | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/bootmem.h> | |
19 | #include <linux/major.h> | |
20 | #include <linux/irq.h> | |
21 | ||
22 | #include <asm/machdep.h> | |
23 | #include <asm/atomic.h> | |
24 | #include <asm/page.h> | |
25 | #include <asm/v850e_timer_d.h> | |
26 | #include <asm/v850e_uart.h> | |
27 | ||
28 | #include "mach.h" | |
29 | ||
30 | ||
31 | /* SRAM and SDRAM are vaguely contiguous (with a big hole in between; see | |
32 | mach_reserve_bootmem for details); use both as one big area. */ | |
33 | #define RAM_START SRAM_ADDR | |
34 | #define RAM_END (SDRAM_ADDR + SDRAM_SIZE) | |
35 | ||
36 | /* The bits of this port are connected to an 8-LED bar-graph. */ | |
37 | #define LEDS_PORT 0 | |
38 | ||
39 | ||
40 | static void anna_led_tick (void); | |
41 | ||
42 | ||
43 | void __init mach_early_init (void) | |
44 | { | |
45 | ANNA_ILBEN = 0; | |
46 | ||
47 | V850E2_CSC(0) = 0x402F; | |
48 | V850E2_CSC(1) = 0x4000; | |
49 | V850E2_BPC = 0; | |
50 | V850E2_BSC = 0xAAAA; | |
51 | V850E2_BEC = 0; | |
52 | ||
53 | #if 0 | |
54 | V850E2_BHC = 0xFFFF; /* icache all memory, dcache all */ | |
55 | #else | |
56 | V850E2_BHC = 0; /* cache no memory */ | |
57 | #endif | |
58 | V850E2_BCT(0) = 0xB088; | |
59 | V850E2_BCT(1) = 0x0008; | |
60 | V850E2_DWC(0) = 0x0027; | |
61 | V850E2_DWC(1) = 0; | |
62 | V850E2_BCC = 0x0006; | |
63 | V850E2_ASC = 0; | |
64 | V850E2_LBS = 0x0089; | |
65 | V850E2_SCR(3) = 0x21A9; | |
66 | V850E2_RFS(3) = 0x8121; | |
67 | ||
68 | v850e_intc_disable_irqs (); | |
69 | } | |
70 | ||
71 | void __init mach_setup (char **cmdline) | |
72 | { | |
73 | ANNA_PORT_PM (LEDS_PORT) = 0; /* Make all LED pins output pins. */ | |
74 | mach_tick = anna_led_tick; | |
75 | } | |
76 | ||
77 | void __init mach_get_physical_ram (unsigned long *ram_start, | |
78 | unsigned long *ram_len) | |
79 | { | |
80 | *ram_start = RAM_START; | |
81 | *ram_len = RAM_END - RAM_START; | |
82 | } | |
83 | ||
84 | void __init mach_reserve_bootmem () | |
85 | { | |
86 | /* The space between SRAM and SDRAM is filled with duplicate | |
87 | images of SRAM. Prevent the kernel from using them. */ | |
88 | reserve_bootmem (SRAM_ADDR + SRAM_SIZE, | |
89 | SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE)); | |
90 | } | |
91 | ||
92 | void mach_gettimeofday (struct timespec *tv) | |
93 | { | |
94 | tv->tv_sec = 0; | |
95 | tv->tv_nsec = 0; | |
96 | } | |
97 | ||
98 | void __init mach_sched_init (struct irqaction *timer_action) | |
99 | { | |
100 | /* Start hardware timer. */ | |
101 | v850e_timer_d_configure (0, HZ); | |
102 | /* Install timer interrupt handler. */ | |
103 | setup_irq (IRQ_INTCMD(0), timer_action); | |
104 | } | |
105 | ||
106 | static struct v850e_intc_irq_init irq_inits[] = { | |
107 | { "IRQ", 0, NUM_MACH_IRQS, 1, 7 }, | |
108 | { "PIN", IRQ_INTP(0), IRQ_INTP_NUM, 1, 4 }, | |
109 | { "CCC", IRQ_INTCCC(0), IRQ_INTCCC_NUM, 1, 5 }, | |
110 | { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 }, | |
111 | { "DMA", IRQ_INTDMA(0), IRQ_INTDMA_NUM, 1, 2 }, | |
112 | { "DMXER", IRQ_INTDMXER,1, 1, 2 }, | |
113 | { "SRE", IRQ_INTSRE(0), IRQ_INTSRE_NUM, 3, 3 }, | |
114 | { "SR", IRQ_INTSR(0), IRQ_INTSR_NUM, 3, 4 }, | |
115 | { "ST", IRQ_INTST(0), IRQ_INTST_NUM, 3, 5 }, | |
116 | { 0 } | |
117 | }; | |
118 | #define NUM_IRQ_INITS ((sizeof irq_inits / sizeof irq_inits[0]) - 1) | |
119 | ||
120 | static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS]; | |
121 | ||
122 | void __init mach_init_irqs (void) | |
123 | { | |
124 | v850e_intc_init_irq_types (irq_inits, hw_itypes); | |
125 | } | |
126 | ||
127 | void machine_restart (char *__unused) | |
128 | { | |
129 | #ifdef CONFIG_RESET_GUARD | |
130 | disable_reset_guard (); | |
131 | #endif | |
132 | asm ("jmp r0"); /* Jump to the reset vector. */ | |
133 | } | |
134 | ||
1da177e4 LT |
135 | void machine_halt (void) |
136 | { | |
137 | #ifdef CONFIG_RESET_GUARD | |
138 | disable_reset_guard (); | |
139 | #endif | |
140 | local_irq_disable (); /* Ignore all interrupts. */ | |
141 | ANNA_PORT_IO(LEDS_PORT) = 0xAA; /* Note that we halted. */ | |
142 | for (;;) | |
143 | asm ("halt; nop; nop; nop; nop; nop"); | |
144 | } | |
145 | ||
1da177e4 LT |
146 | void machine_power_off (void) |
147 | { | |
148 | machine_halt (); | |
149 | } | |
150 | ||
1da177e4 LT |
151 | /* Called before configuring an on-chip UART. */ |
152 | void anna_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud) | |
153 | { | |
154 | /* The Anna connects some general-purpose I/O pins on the CPU to | |
155 | the RTS/CTS lines of UART 1's serial connection. I/O pins P07 | |
156 | and P37 are RTS and CTS respectively. */ | |
157 | if (chan == 1) { | |
158 | ANNA_PORT_PM(0) &= ~0x80; /* P07 in output mode */ | |
159 | ANNA_PORT_PM(3) |= 0x80; /* P37 in input mode */ | |
160 | } | |
161 | } | |
162 | ||
163 | /* Minimum and maximum bounds for the moving upper LED boundary in the | |
164 | clock tick display. We can't use the last bit because it's used for | |
165 | UART0's CTS output. */ | |
166 | #define MIN_MAX_POS 0 | |
167 | #define MAX_MAX_POS 6 | |
168 | ||
169 | /* There are MAX_MAX_POS^2 - MIN_MAX_POS^2 cycles in the animation, so if | |
170 | we pick 6 and 0 as above, we get 49 cycles, which is when divided into | |
171 | the standard 100 value for HZ, gives us an almost 1s total time. */ | |
172 | #define TICKS_PER_FRAME \ | |
173 | (HZ / (MAX_MAX_POS * MAX_MAX_POS - MIN_MAX_POS * MIN_MAX_POS)) | |
174 | ||
175 | static void anna_led_tick () | |
176 | { | |
177 | static unsigned counter = 0; | |
178 | ||
179 | if (++counter == TICKS_PER_FRAME) { | |
180 | static int pos = 0, max_pos = MAX_MAX_POS, dir = 1; | |
181 | ||
182 | if (dir > 0 && pos == max_pos) { | |
183 | dir = -1; | |
184 | if (max_pos == MIN_MAX_POS) | |
185 | max_pos = MAX_MAX_POS; | |
186 | else | |
187 | max_pos--; | |
188 | } else { | |
189 | if (dir < 0 && pos == 0) | |
190 | dir = 1; | |
191 | ||
192 | if (pos + dir <= max_pos) { | |
193 | /* Each bit of port 0 has a LED. */ | |
194 | clear_bit (pos, &ANNA_PORT_IO(LEDS_PORT)); | |
195 | pos += dir; | |
196 | set_bit (pos, &ANNA_PORT_IO(LEDS_PORT)); | |
197 | } | |
198 | } | |
199 | ||
200 | counter = 0; | |
201 | } | |
202 | } |