[ARM] Fix some section mismatch warnings
[linux-2.6.git] / arch / arm / mach-ixp23xx / ixdp2351.c
1 /*
2  * arch/arm/mach-ixp23xx/ixdp2351.c
3  *
4  * IXDP2351 board-specific routines
5  *
6  * Author: Deepak Saxena <dsaxena@plexity.net>
7  *
8  * Copyright 2005 (c) MontaVista Software, Inc.
9  *
10  * Based on 2.4 code Copyright 2004 (c) Intel Corporation
11  *
12  * This file is licensed under the terms of the GNU General Public
13  * License version 2. This program is licensed "as is" without any
14  * warranty of any kind, whether express or implied.
15  */
16
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/spinlock.h>
20 #include <linux/sched.h>
21 #include <linux/interrupt.h>
22 #include <linux/irq.h>
23 #include <linux/serial.h>
24 #include <linux/tty.h>
25 #include <linux/bitops.h>
26 #include <linux/ioport.h>
27 #include <linux/serial.h>
28 #include <linux/serial_8250.h>
29 #include <linux/serial_core.h>
30 #include <linux/device.h>
31 #include <linux/mm.h>
32 #include <linux/pci.h>
33 #include <linux/mtd/physmap.h>
34
35 #include <asm/types.h>
36 #include <asm/setup.h>
37 #include <asm/memory.h>
38 #include <asm/hardware.h>
39 #include <asm/mach-types.h>
40 #include <asm/system.h>
41 #include <asm/tlbflush.h>
42 #include <asm/pgtable.h>
43
44 #include <asm/mach/map.h>
45 #include <asm/mach/irq.h>
46 #include <asm/mach/arch.h>
47 #include <asm/mach/irq.h>
48 #include <asm/mach/pci.h>
49
50 /*
51  * IXDP2351 Interrupt Handling
52  */
53 static void ixdp2351_inta_mask(unsigned int irq)
54 {
55         *IXDP2351_CPLD_INTA_MASK_SET_REG = IXDP2351_INTA_IRQ_MASK(irq);
56 }
57
58 static void ixdp2351_inta_unmask(unsigned int irq)
59 {
60         *IXDP2351_CPLD_INTA_MASK_CLR_REG = IXDP2351_INTA_IRQ_MASK(irq);
61 }
62
63 static void ixdp2351_inta_handler(unsigned int irq, struct irq_desc *desc)
64 {
65         u16 ex_interrupt =
66                 *IXDP2351_CPLD_INTA_STAT_REG & IXDP2351_INTA_IRQ_VALID;
67         int i;
68
69         desc->chip->mask(irq);
70
71         for (i = 0; i < IXDP2351_INTA_IRQ_NUM; i++) {
72                 if (ex_interrupt & (1 << i)) {
73                         struct irq_desc *cpld_desc;
74                         int cpld_irq =
75                                 IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + i);
76                         cpld_desc = irq_desc + cpld_irq;
77                         desc_handle_irq(cpld_irq, cpld_desc);
78                 }
79         }
80
81         desc->chip->unmask(irq);
82 }
83
84 static struct irq_chip ixdp2351_inta_chip = {
85         .ack    = ixdp2351_inta_mask,
86         .mask   = ixdp2351_inta_mask,
87         .unmask = ixdp2351_inta_unmask
88 };
89
90 static void ixdp2351_intb_mask(unsigned int irq)
91 {
92         *IXDP2351_CPLD_INTB_MASK_SET_REG = IXDP2351_INTB_IRQ_MASK(irq);
93 }
94
95 static void ixdp2351_intb_unmask(unsigned int irq)
96 {
97         *IXDP2351_CPLD_INTB_MASK_CLR_REG = IXDP2351_INTB_IRQ_MASK(irq);
98 }
99
100 static void ixdp2351_intb_handler(unsigned int irq, struct irq_desc *desc)
101 {
102         u16 ex_interrupt =
103                 *IXDP2351_CPLD_INTB_STAT_REG & IXDP2351_INTB_IRQ_VALID;
104         int i;
105
106         desc->chip->ack(irq);
107
108         for (i = 0; i < IXDP2351_INTB_IRQ_NUM; i++) {
109                 if (ex_interrupt & (1 << i)) {
110                         struct irq_desc *cpld_desc;
111                         int cpld_irq =
112                                 IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + i);
113                         cpld_desc = irq_desc + cpld_irq;
114                         desc_handle_irq(cpld_irq, cpld_desc);
115                 }
116         }
117
118         desc->chip->unmask(irq);
119 }
120
121 static struct irq_chip ixdp2351_intb_chip = {
122         .ack    = ixdp2351_intb_mask,
123         .mask   = ixdp2351_intb_mask,
124         .unmask = ixdp2351_intb_unmask
125 };
126
127 void __init ixdp2351_init_irq(void)
128 {
129         int irq;
130
131         /* Mask all interrupts from CPLD, disable simulation */
132         *IXDP2351_CPLD_INTA_MASK_SET_REG = (u16) -1;
133         *IXDP2351_CPLD_INTB_MASK_SET_REG = (u16) -1;
134         *IXDP2351_CPLD_INTA_SIM_REG = 0;
135         *IXDP2351_CPLD_INTB_SIM_REG = 0;
136
137         ixp23xx_init_irq();
138
139         for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE);
140              irq <
141              IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + IXDP2351_INTA_IRQ_NUM);
142              irq++) {
143                 if (IXDP2351_INTA_IRQ_MASK(irq) & IXDP2351_INTA_IRQ_VALID) {
144                         set_irq_flags(irq, IRQF_VALID);
145                         set_irq_handler(irq, handle_level_irq);
146                         set_irq_chip(irq, &ixdp2351_inta_chip);
147                 }
148         }
149
150         for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE);
151              irq <
152              IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + IXDP2351_INTB_IRQ_NUM);
153              irq++) {
154                 if (IXDP2351_INTB_IRQ_MASK(irq) & IXDP2351_INTB_IRQ_VALID) {
155                         set_irq_flags(irq, IRQF_VALID);
156                         set_irq_handler(irq, handle_level_irq);
157                         set_irq_chip(irq, &ixdp2351_intb_chip);
158                 }
159         }
160
161         set_irq_chained_handler(IRQ_IXP23XX_INTA, ixdp2351_inta_handler);
162         set_irq_chained_handler(IRQ_IXP23XX_INTB, ixdp2351_intb_handler);
163 }
164
165 /*
166  * IXDP2351 PCI
167  */
168
169 /*
170  * This board does not do normal PCI IRQ routing, or any
171  * sort of swizzling, so we just need to check where on the
172  * bus the device is and figure out what CPLD pin it is
173  * being routed to.
174  */
175 #define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
176
177 static int __init ixdp2351_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
178 {
179         u8 bus = dev->bus->number;
180         u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin);
181         struct pci_bus *tmp_bus = dev->bus;
182
183         /* Primary bus, no interrupts here */
184         if (!bus)
185                 return -1;
186
187         /* Lookup first leaf in bus tree */
188         while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL))
189                 tmp_bus = tmp_bus->parent;
190
191         /* Select between known bridges */
192         switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) {
193                 /* Device is located after first bridge */
194         case 0x0008:
195                 if (tmp_bus == dev->bus) {
196                         /* Device is located directy after first bridge */
197                         switch (devpin) {
198                                 /* Onboard 82546 */
199                         case DEVPIN(1, 1):      /* Onboard 82546 ch 0 */
200                                 return IRQ_IXDP2351_INTA_82546;
201                         case DEVPIN(1, 2):      /* Onboard 82546 ch 1 */
202                                 return IRQ_IXDP2351_INTB_82546;
203                                 /* PMC SLOT */
204                         case DEVPIN(0, 1):      /* PMCP INTA# */
205                         case DEVPIN(2, 4):      /* PMCS INTD# */
206                                 return IRQ_IXDP2351_SPCI_PMC_INTA;
207                         case DEVPIN(0, 2):      /* PMCP INTB# */
208                         case DEVPIN(2, 1):      /* PMCS INTA# */
209                                 return IRQ_IXDP2351_SPCI_PMC_INTB;
210                         case DEVPIN(0, 3):      /* PMCP INTC# */
211                         case DEVPIN(2, 2):      /* PMCS INTB# */
212                                 return IRQ_IXDP2351_SPCI_PMC_INTC;
213                         case DEVPIN(0, 4):      /* PMCP INTD# */
214                         case DEVPIN(2, 3):      /* PMCS INTC# */
215                                 return IRQ_IXDP2351_SPCI_PMC_INTD;
216                         }
217                 } else {
218                         /* Device is located indirectly after first bridge */
219                         /* Not supported now */
220                         return -1;
221                 }
222                 break;
223         case 0x0010:
224                 if (tmp_bus == dev->bus) {
225                         /* Device is located directy after second bridge */
226                         /* Secondary bus of second bridge */
227                         switch (devpin) {
228                         case DEVPIN(0, 1):      /* DB#0 */
229                         case DEVPIN(0, 2):
230                         case DEVPIN(0, 3):
231                         case DEVPIN(0, 4):
232                                 return IRQ_IXDP2351_SPCI_DB_0;
233                         case DEVPIN(1, 1):      /* DB#1 */
234                         case DEVPIN(1, 2):
235                         case DEVPIN(1, 3):
236                         case DEVPIN(1, 4):
237                                 return IRQ_IXDP2351_SPCI_DB_1;
238                         case DEVPIN(2, 1):      /* FIC1 */
239                         case DEVPIN(2, 2):
240                         case DEVPIN(2, 3):
241                         case DEVPIN(2, 4):
242                         case DEVPIN(3, 1):      /* FIC2 */
243                         case DEVPIN(3, 2):
244                         case DEVPIN(3, 3):
245                         case DEVPIN(3, 4):
246                                 return IRQ_IXDP2351_SPCI_FIC;
247                         }
248                 } else {
249                         /* Device is located indirectly after second bridge */
250                         /* Not supported now */
251                         return -1;
252                 }
253                 break;
254         }
255
256         return -1;
257 }
258
259 struct hw_pci ixdp2351_pci __initdata = {
260         .nr_controllers = 1,
261         .preinit        = ixp23xx_pci_preinit,
262         .setup          = ixp23xx_pci_setup,
263         .scan           = ixp23xx_pci_scan_bus,
264         .map_irq        = ixdp2351_map_irq,
265 };
266
267 int __init ixdp2351_pci_init(void)
268 {
269         if (machine_is_ixdp2351())
270                 pci_common_init(&ixdp2351_pci);
271
272         return 0;
273 }
274
275 subsys_initcall(ixdp2351_pci_init);
276
277 /*
278  * IXDP2351 Static Mapped I/O
279  */
280 static struct map_desc ixdp2351_io_desc[] __initdata = {
281         {
282                 .virtual        = IXDP2351_NP_VIRT_BASE,
283                 .pfn            = __phys_to_pfn((u64)IXDP2351_NP_PHYS_BASE),
284                 .length         = IXDP2351_NP_PHYS_SIZE,
285                 .type           = MT_DEVICE
286         }, {
287                 .virtual        = IXDP2351_BB_BASE_VIRT,
288                 .pfn            = __phys_to_pfn((u64)IXDP2351_BB_BASE_PHYS),
289                 .length         = IXDP2351_BB_SIZE,
290                 .type           = MT_DEVICE
291         }
292 };
293
294 static void __init ixdp2351_map_io(void)
295 {
296         ixp23xx_map_io();
297         iotable_init(ixdp2351_io_desc, ARRAY_SIZE(ixdp2351_io_desc));
298 }
299
300 static struct physmap_flash_data ixdp2351_flash_data = {
301         .width          = 1,
302 };
303
304 static struct resource ixdp2351_flash_resource = {
305         .start          = 0x90000000,
306         .end            = 0x93ffffff,
307         .flags          = IORESOURCE_MEM,
308 };
309
310 static struct platform_device ixdp2351_flash = {
311         .name           = "physmap-flash",
312         .id             = 0,
313         .dev            = {
314                 .platform_data  = &ixdp2351_flash_data,
315         },
316         .num_resources  = 1,
317         .resource       = &ixdp2351_flash_resource,
318 };
319
320 static void __init ixdp2351_init(void)
321 {
322         platform_device_register(&ixdp2351_flash);
323
324         /*
325          * Mark flash as writeable
326          */
327         IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
328         IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
329         IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
330         IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
331
332         ixp23xx_sys_init();
333 }
334
335 MACHINE_START(IXDP2351, "Intel IXDP2351 Development Platform")
336         /* Maintainer: MontaVista Software, Inc. */
337         .phys_io        = IXP23XX_PERIPHERAL_PHYS,
338         .io_pg_offst    = ((IXP23XX_PERIPHERAL_VIRT >> 18)) & 0xfffc,
339         .map_io         = ixdp2351_map_io,
340         .init_irq       = ixdp2351_init_irq,
341         .timer          = &ixp23xx_timer,
342         .boot_params    = 0x00000100,
343         .init_machine   = ixdp2351_init,
344 MACHINE_END