2 * arch/arm/mach-ixp23xx/ixdp2351.c
4 * IXDP2351 board-specific routines
6 * Author: Deepak Saxena <dsaxena@plexity.net>
8 * Copyright 2005 (c) MontaVista Software, Inc.
10 * Based on 2.4 code Copyright 2004 (c) Intel Corporation
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.
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_8250.h>
28 #include <linux/serial_core.h>
29 #include <linux/device.h>
31 #include <linux/pci.h>
32 #include <linux/mtd/physmap.h>
34 #include <asm/types.h>
35 #include <asm/setup.h>
36 #include <asm/memory.h>
37 #include <mach/hardware.h>
38 #include <asm/mach-types.h>
39 #include <asm/system.h>
40 #include <asm/tlbflush.h>
41 #include <asm/pgtable.h>
43 #include <asm/mach/map.h>
44 #include <asm/mach/irq.h>
45 #include <asm/mach/arch.h>
46 #include <asm/mach/pci.h>
49 * IXDP2351 Interrupt Handling
51 static void ixdp2351_inta_mask(struct irq_data *d)
53 *IXDP2351_CPLD_INTA_MASK_SET_REG = IXDP2351_INTA_IRQ_MASK(d->irq);
56 static void ixdp2351_inta_unmask(struct irq_data *d)
58 *IXDP2351_CPLD_INTA_MASK_CLR_REG = IXDP2351_INTA_IRQ_MASK(d->irq);
61 static void ixdp2351_inta_handler(unsigned int irq, struct irq_desc *desc)
64 *IXDP2351_CPLD_INTA_STAT_REG & IXDP2351_INTA_IRQ_VALID;
67 desc->irq_data.chip->irq_mask(&desc->irq_data);
69 for (i = 0; i < IXDP2351_INTA_IRQ_NUM; i++) {
70 if (ex_interrupt & (1 << i)) {
72 IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + i);
73 generic_handle_irq(cpld_irq);
77 desc->irq_data.chip->irq_unmask(&desc->irq_data);
80 static struct irq_chip ixdp2351_inta_chip = {
81 .irq_ack = ixdp2351_inta_mask,
82 .irq_mask = ixdp2351_inta_mask,
83 .irq_unmask = ixdp2351_inta_unmask
86 static void ixdp2351_intb_mask(struct irq_data *d)
88 *IXDP2351_CPLD_INTB_MASK_SET_REG = IXDP2351_INTB_IRQ_MASK(d->irq);
91 static void ixdp2351_intb_unmask(struct irq_data *d)
93 *IXDP2351_CPLD_INTB_MASK_CLR_REG = IXDP2351_INTB_IRQ_MASK(d->irq);
96 static void ixdp2351_intb_handler(unsigned int irq, struct irq_desc *desc)
99 *IXDP2351_CPLD_INTB_STAT_REG & IXDP2351_INTB_IRQ_VALID;
102 desc->irq_data.chip->irq_ack(&desc->irq_data);
104 for (i = 0; i < IXDP2351_INTB_IRQ_NUM; i++) {
105 if (ex_interrupt & (1 << i)) {
107 IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + i);
108 generic_handle_irq(cpld_irq);
112 desc->irq_data.chip->irq_unmask(&desc->irq_data);
115 static struct irq_chip ixdp2351_intb_chip = {
116 .irq_ack = ixdp2351_intb_mask,
117 .irq_mask = ixdp2351_intb_mask,
118 .irq_unmask = ixdp2351_intb_unmask
121 void __init ixdp2351_init_irq(void)
125 /* Mask all interrupts from CPLD, disable simulation */
126 *IXDP2351_CPLD_INTA_MASK_SET_REG = (u16) -1;
127 *IXDP2351_CPLD_INTB_MASK_SET_REG = (u16) -1;
128 *IXDP2351_CPLD_INTA_SIM_REG = 0;
129 *IXDP2351_CPLD_INTB_SIM_REG = 0;
133 for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE);
135 IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + IXDP2351_INTA_IRQ_NUM);
137 if (IXDP2351_INTA_IRQ_MASK(irq) & IXDP2351_INTA_IRQ_VALID) {
138 set_irq_flags(irq, IRQF_VALID);
139 irq_set_chip_and_handler(irq, &ixdp2351_inta_chip,
144 for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE);
146 IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + IXDP2351_INTB_IRQ_NUM);
148 if (IXDP2351_INTB_IRQ_MASK(irq) & IXDP2351_INTB_IRQ_VALID) {
149 set_irq_flags(irq, IRQF_VALID);
150 irq_set_chip_and_handler(irq, &ixdp2351_intb_chip,
155 irq_set_chained_handler(IRQ_IXP23XX_INTA, ixdp2351_inta_handler);
156 irq_set_chained_handler(IRQ_IXP23XX_INTB, ixdp2351_intb_handler);
164 * This board does not do normal PCI IRQ routing, or any
165 * sort of swizzling, so we just need to check where on the
166 * bus the device is and figure out what CPLD pin it is
169 #define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
171 static int __init ixdp2351_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
173 u8 bus = dev->bus->number;
174 u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin);
175 struct pci_bus *tmp_bus = dev->bus;
177 /* Primary bus, no interrupts here */
181 /* Lookup first leaf in bus tree */
182 while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL))
183 tmp_bus = tmp_bus->parent;
185 /* Select between known bridges */
186 switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) {
187 /* Device is located after first bridge */
189 if (tmp_bus == dev->bus) {
190 /* Device is located directy after first bridge */
193 case DEVPIN(1, 1): /* Onboard 82546 ch 0 */
194 return IRQ_IXDP2351_INTA_82546;
195 case DEVPIN(1, 2): /* Onboard 82546 ch 1 */
196 return IRQ_IXDP2351_INTB_82546;
198 case DEVPIN(0, 1): /* PMCP INTA# */
199 case DEVPIN(2, 4): /* PMCS INTD# */
200 return IRQ_IXDP2351_SPCI_PMC_INTA;
201 case DEVPIN(0, 2): /* PMCP INTB# */
202 case DEVPIN(2, 1): /* PMCS INTA# */
203 return IRQ_IXDP2351_SPCI_PMC_INTB;
204 case DEVPIN(0, 3): /* PMCP INTC# */
205 case DEVPIN(2, 2): /* PMCS INTB# */
206 return IRQ_IXDP2351_SPCI_PMC_INTC;
207 case DEVPIN(0, 4): /* PMCP INTD# */
208 case DEVPIN(2, 3): /* PMCS INTC# */
209 return IRQ_IXDP2351_SPCI_PMC_INTD;
212 /* Device is located indirectly after first bridge */
213 /* Not supported now */
218 if (tmp_bus == dev->bus) {
219 /* Device is located directy after second bridge */
220 /* Secondary bus of second bridge */
222 case DEVPIN(0, 1): /* DB#0 */
226 return IRQ_IXDP2351_SPCI_DB_0;
227 case DEVPIN(1, 1): /* DB#1 */
231 return IRQ_IXDP2351_SPCI_DB_1;
232 case DEVPIN(2, 1): /* FIC1 */
236 case DEVPIN(3, 1): /* FIC2 */
240 return IRQ_IXDP2351_SPCI_FIC;
243 /* Device is located indirectly after second bridge */
244 /* Not supported now */
253 struct hw_pci ixdp2351_pci __initdata = {
255 .preinit = ixp23xx_pci_preinit,
256 .setup = ixp23xx_pci_setup,
257 .scan = ixp23xx_pci_scan_bus,
258 .map_irq = ixdp2351_map_irq,
261 int __init ixdp2351_pci_init(void)
263 if (machine_is_ixdp2351())
264 pci_common_init(&ixdp2351_pci);
269 subsys_initcall(ixdp2351_pci_init);
272 * IXDP2351 Static Mapped I/O
274 static struct map_desc ixdp2351_io_desc[] __initdata = {
276 .virtual = IXDP2351_NP_VIRT_BASE,
277 .pfn = __phys_to_pfn((u64)IXDP2351_NP_PHYS_BASE),
278 .length = IXDP2351_NP_PHYS_SIZE,
281 .virtual = IXDP2351_BB_BASE_VIRT,
282 .pfn = __phys_to_pfn((u64)IXDP2351_BB_BASE_PHYS),
283 .length = IXDP2351_BB_SIZE,
288 static void __init ixdp2351_map_io(void)
291 iotable_init(ixdp2351_io_desc, ARRAY_SIZE(ixdp2351_io_desc));
294 static struct physmap_flash_data ixdp2351_flash_data = {
298 static struct resource ixdp2351_flash_resource = {
301 .flags = IORESOURCE_MEM,
304 static struct platform_device ixdp2351_flash = {
305 .name = "physmap-flash",
308 .platform_data = &ixdp2351_flash_data,
311 .resource = &ixdp2351_flash_resource,
314 static void __init ixdp2351_init(void)
316 platform_device_register(&ixdp2351_flash);
319 * Mark flash as writeable
321 IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
322 IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
323 IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
324 IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
329 static void ixdp2351_restart(char mode, const char *cmd)
331 /* First try machine specific support */
333 *IXDP2351_CPLD_RESET1_REG = IXDP2351_CPLD_RESET1_MAGIC;
334 (void) *IXDP2351_CPLD_RESET1_REG;
335 *IXDP2351_CPLD_RESET1_REG = IXDP2351_CPLD_RESET1_ENABLE;
337 ixp23xx_restart(mode, cmd);
340 MACHINE_START(IXDP2351, "Intel IXDP2351 Development Platform")
341 /* Maintainer: MontaVista Software, Inc. */
342 .map_io = ixdp2351_map_io,
343 .init_irq = ixdp2351_init_irq,
344 .timer = &ixp23xx_timer,
345 .atag_offset = 0x100,
346 .init_machine = ixdp2351_init,
347 .restart = ixdp2351_restart,