4c0f7c65facf93f215e510d628b9c17d9cdbcb00
[linux-2.6.git] / arch / arm / mach-integrator / integrator_ap.c
1 /*
2  *  linux/arch/arm/mach-integrator/integrator_ap.c
3  *
4  *  Copyright (C) 2000-2003 Deep Blue Solutions Ltd
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20 #include <linux/types.h>
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/list.h>
24 #include <linux/platform_device.h>
25 #include <linux/slab.h>
26 #include <linux/string.h>
27 #include <linux/sysdev.h>
28
29 #include <asm/hardware.h>
30 #include <asm/io.h>
31 #include <asm/irq.h>
32 #include <asm/setup.h>
33 #include <asm/param.h>          /* HZ */
34 #include <asm/mach-types.h>
35 #include <asm/hardware/amba.h>
36 #include <asm/hardware/amba_kmi.h>
37
38 #include <asm/arch/lm.h>
39
40 #include <asm/mach/arch.h>
41 #include <asm/mach/flash.h>
42 #include <asm/mach/irq.h>
43 #include <asm/mach/map.h>
44 #include <asm/mach/time.h>
45
46 #include "common.h"
47
48 /* 
49  * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
50  * is the (PA >> 12).
51  *
52  * Setup a VA for the Integrator interrupt controller (for header #0,
53  * just for now).
54  */
55 #define VA_IC_BASE      IO_ADDRESS(INTEGRATOR_IC_BASE) 
56 #define VA_SC_BASE      IO_ADDRESS(INTEGRATOR_SC_BASE)
57 #define VA_EBI_BASE     IO_ADDRESS(INTEGRATOR_EBI_BASE)
58 #define VA_CMIC_BASE    IO_ADDRESS(INTEGRATOR_HDR_BASE) + INTEGRATOR_HDR_IC_OFFSET
59
60 /*
61  * Logical      Physical
62  * e8000000     40000000        PCI memory              PHYS_PCI_MEM_BASE       (max 512M)
63  * ec000000     61000000        PCI config space        PHYS_PCI_CONFIG_BASE    (max 16M)
64  * ed000000     62000000        PCI V3 regs             PHYS_PCI_V3_BASE        (max 64k)
65  * ee000000     60000000        PCI IO                  PHYS_PCI_IO_BASE        (max 16M)
66  * ef000000                     Cache flush
67  * f1000000     10000000        Core module registers
68  * f1100000     11000000        System controller registers
69  * f1200000     12000000        EBI registers
70  * f1300000     13000000        Counter/Timer
71  * f1400000     14000000        Interrupt controller
72  * f1600000     16000000        UART 0
73  * f1700000     17000000        UART 1
74  * f1a00000     1a000000        Debug LEDs
75  * f1b00000     1b000000        GPIO
76  */
77
78 static struct map_desc ap_io_desc[] __initdata = {
79         {
80                 .virtual        = IO_ADDRESS(INTEGRATOR_HDR_BASE),
81                 .pfn            = __phys_to_pfn(INTEGRATOR_HDR_BASE),
82                 .length         = SZ_4K,
83                 .type           = MT_DEVICE
84         }, {
85                 .virtual        = IO_ADDRESS(INTEGRATOR_SC_BASE),
86                 .pfn            = __phys_to_pfn(INTEGRATOR_SC_BASE),
87                 .length         = SZ_4K,
88                 .type           = MT_DEVICE
89         }, {
90                 .virtual        = IO_ADDRESS(INTEGRATOR_EBI_BASE),
91                 .pfn            = __phys_to_pfn(INTEGRATOR_EBI_BASE),
92                 .length         = SZ_4K,
93                 .type           = MT_DEVICE
94         }, {
95                 .virtual        = IO_ADDRESS(INTEGRATOR_CT_BASE),
96                 .pfn            = __phys_to_pfn(INTEGRATOR_CT_BASE),
97                 .length         = SZ_4K,
98                 .type           = MT_DEVICE
99         }, {
100                 .virtual        = IO_ADDRESS(INTEGRATOR_IC_BASE),
101                 .pfn            = __phys_to_pfn(INTEGRATOR_IC_BASE),
102                 .length         = SZ_4K,
103                 .type           = MT_DEVICE
104         }, {
105                 .virtual        = IO_ADDRESS(INTEGRATOR_UART0_BASE),
106                 .pfn            = __phys_to_pfn(INTEGRATOR_UART0_BASE),
107                 .length         = SZ_4K,
108                 .type           = MT_DEVICE
109         }, {
110                 .virtual        = IO_ADDRESS(INTEGRATOR_UART1_BASE),
111                 .pfn            = __phys_to_pfn(INTEGRATOR_UART1_BASE),
112                 .length         = SZ_4K,
113                 .type           = MT_DEVICE
114         }, {
115                 .virtual        = IO_ADDRESS(INTEGRATOR_DBG_BASE),
116                 .pfn            = __phys_to_pfn(INTEGRATOR_DBG_BASE),
117                 .length         = SZ_4K,
118                 .type           = MT_DEVICE
119         }, {
120                 .virtual        = IO_ADDRESS(INTEGRATOR_GPIO_BASE),
121                 .pfn            = __phys_to_pfn(INTEGRATOR_GPIO_BASE),
122                 .length         = SZ_4K,
123                 .type           = MT_DEVICE
124         }, {
125                 .virtual        = PCI_MEMORY_VADDR,
126                 .pfn            = __phys_to_pfn(PHYS_PCI_MEM_BASE),
127                 .length         = SZ_16M,
128                 .type           = MT_DEVICE
129         }, {
130                 .virtual        = PCI_CONFIG_VADDR,
131                 .pfn            = __phys_to_pfn(PHYS_PCI_CONFIG_BASE),
132                 .length         = SZ_16M,
133                 .type           = MT_DEVICE
134         }, {
135                 .virtual        = PCI_V3_VADDR,
136                 .pfn            = __phys_to_pfn(PHYS_PCI_V3_BASE),
137                 .length         = SZ_64K,
138                 .type           = MT_DEVICE
139         }, {
140                 .virtual        = PCI_IO_VADDR,
141                 .pfn            = __phys_to_pfn(PHYS_PCI_IO_BASE),
142                 .length         = SZ_64K,
143                 .type           = MT_DEVICE
144         }
145 };
146
147 static void __init ap_map_io(void)
148 {
149         iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
150 }
151
152 #define INTEGRATOR_SC_VALID_INT 0x003fffff
153
154 static void sc_mask_irq(unsigned int irq)
155 {
156         writel(1 << irq, VA_IC_BASE + IRQ_ENABLE_CLEAR);
157 }
158
159 static void sc_unmask_irq(unsigned int irq)
160 {
161         writel(1 << irq, VA_IC_BASE + IRQ_ENABLE_SET);
162 }
163
164 static struct irqchip sc_chip = {
165         .ack    = sc_mask_irq,
166         .mask   = sc_mask_irq,
167         .unmask = sc_unmask_irq,
168 };
169
170 static void __init ap_init_irq(void)
171 {
172         unsigned int i;
173
174         /* Disable all interrupts initially. */
175         /* Do the core module ones */
176         writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
177
178         /* do the header card stuff next */
179         writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
180         writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
181
182         for (i = 0; i < NR_IRQS; i++) {
183                 if (((1 << i) & INTEGRATOR_SC_VALID_INT) != 0) {
184                         set_irq_chip(i, &sc_chip);
185                         set_irq_handler(i, do_level_IRQ);
186                         set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
187                 }
188         }
189 }
190
191 #ifdef CONFIG_PM
192 static unsigned long ic_irq_enable;
193
194 static int irq_suspend(struct sys_device *dev, pm_message_t state)
195 {
196         ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
197         return 0;
198 }
199
200 static int irq_resume(struct sys_device *dev)
201 {
202         /* disable all irq sources */
203         writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
204         writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
205         writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
206
207         writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
208         return 0;
209 }
210 #else
211 #define irq_suspend NULL
212 #define irq_resume NULL
213 #endif
214
215 static struct sysdev_class irq_class = {
216         set_kset_name("irq"),
217         .suspend        = irq_suspend,
218         .resume         = irq_resume,
219 };
220
221 static struct sys_device irq_device = {
222         .id     = 0,
223         .cls    = &irq_class,
224 };
225
226 static int __init irq_init_sysfs(void)
227 {
228         int ret = sysdev_class_register(&irq_class);
229         if (ret == 0)
230                 ret = sysdev_register(&irq_device);
231         return ret;
232 }
233
234 device_initcall(irq_init_sysfs);
235
236 /*
237  * Flash handling.
238  */
239 #define SC_CTRLC (VA_SC_BASE + INTEGRATOR_SC_CTRLC_OFFSET)
240 #define SC_CTRLS (VA_SC_BASE + INTEGRATOR_SC_CTRLS_OFFSET)
241 #define EBI_CSR1 (VA_EBI_BASE + INTEGRATOR_EBI_CSR1_OFFSET)
242 #define EBI_LOCK (VA_EBI_BASE + INTEGRATOR_EBI_LOCK_OFFSET)
243
244 static int ap_flash_init(void)
245 {
246         u32 tmp;
247
248         writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP, SC_CTRLC);
249
250         tmp = readl(EBI_CSR1) | INTEGRATOR_EBI_WRITE_ENABLE;
251         writel(tmp, EBI_CSR1);
252
253         if (!(readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE)) {
254                 writel(0xa05f, EBI_LOCK);
255                 writel(tmp, EBI_CSR1);
256                 writel(0, EBI_LOCK);
257         }
258         return 0;
259 }
260
261 static void ap_flash_exit(void)
262 {
263         u32 tmp;
264
265         writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP, SC_CTRLC);
266
267         tmp = readl(EBI_CSR1) & ~INTEGRATOR_EBI_WRITE_ENABLE;
268         writel(tmp, EBI_CSR1);
269
270         if (readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE) {
271                 writel(0xa05f, EBI_LOCK);
272                 writel(tmp, EBI_CSR1);
273                 writel(0, EBI_LOCK);
274         }
275 }
276
277 static void ap_flash_set_vpp(int on)
278 {
279         unsigned long reg = on ? SC_CTRLS : SC_CTRLC;
280
281         writel(INTEGRATOR_SC_CTRL_nFLVPPEN, reg);
282 }
283
284 static struct flash_platform_data ap_flash_data = {
285         .map_name       = "cfi_probe",
286         .width          = 4,
287         .init           = ap_flash_init,
288         .exit           = ap_flash_exit,
289         .set_vpp        = ap_flash_set_vpp,
290 };
291
292 static struct resource cfi_flash_resource = {
293         .start          = INTEGRATOR_FLASH_BASE,
294         .end            = INTEGRATOR_FLASH_BASE + INTEGRATOR_FLASH_SIZE - 1,
295         .flags          = IORESOURCE_MEM,
296 };
297
298 static struct platform_device cfi_flash_device = {
299         .name           = "armflash",
300         .id             = 0,
301         .dev            = {
302                 .platform_data  = &ap_flash_data,
303         },
304         .num_resources  = 1,
305         .resource       = &cfi_flash_resource,
306 };
307
308 static void __init ap_init(void)
309 {
310         unsigned long sc_dec;
311         int i;
312
313         platform_device_register(&cfi_flash_device);
314
315         sc_dec = readl(VA_SC_BASE + INTEGRATOR_SC_DEC_OFFSET);
316         for (i = 0; i < 4; i++) {
317                 struct lm_device *lmdev;
318
319                 if ((sc_dec & (16 << i)) == 0)
320                         continue;
321
322                 lmdev = kmalloc(sizeof(struct lm_device), GFP_KERNEL);
323                 if (!lmdev)
324                         continue;
325
326                 memset(lmdev, 0, sizeof(struct lm_device));
327
328                 lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
329                 lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
330                 lmdev->resource.flags = IORESOURCE_MEM;
331                 lmdev->irq = IRQ_AP_EXPINT0 + i;
332                 lmdev->id = i;
333
334                 lm_device_register(lmdev);
335         }
336 }
337
338 static void __init ap_init_timer(void)
339 {
340         integrator_time_init(1000000 * TICKS_PER_uSEC / HZ, 0);
341 }
342
343 static struct sys_timer ap_timer = {
344         .init           = ap_init_timer,
345         .offset         = integrator_gettimeoffset,
346 };
347
348 MACHINE_START(INTEGRATOR, "ARM-Integrator")
349         /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
350         .phys_ram       = 0x00000000,
351         .phys_io        = 0x16000000,
352         .io_pg_offst    = ((0xf1600000) >> 18) & 0xfffc,
353         .boot_params    = 0x00000100,
354         .map_io         = ap_map_io,
355         .init_irq       = ap_init_irq,
356         .timer          = &ap_timer,
357         .init_machine   = ap_init,
358 MACHINE_END