2 * PCI Tower specific code
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/pci.h>
14 #include <linux/serial_8250.h>
18 #include <asm/irq_cpu.h>
21 #define PORT(_base,_irq) \
26 .iotype = UPIO_PORT, \
27 .flags = UPF_BOOT_AUTOCONF, \
30 static struct plat_serial8250_port pcit_data[] = {
36 static struct platform_device pcit_serial8250_device = {
38 .id = PLAT8250_DEV_PLATFORM,
40 .platform_data = pcit_data,
44 static struct plat_serial8250_port pcit_cplus_data[] = {
52 static struct platform_device pcit_cplus_serial8250_device = {
54 .id = PLAT8250_DEV_PLATFORM,
56 .platform_data = pcit_cplus_data,
60 static struct resource pcit_cmos_rsrc[] = {
64 .flags = IORESOURCE_IO
69 .flags = IORESOURCE_IRQ
73 static struct platform_device pcit_cmos_device = {
75 .num_resources = ARRAY_SIZE(pcit_cmos_rsrc),
76 .resource = pcit_cmos_rsrc
79 static struct resource sni_io_resource = {
80 .start = 0x00000000UL,
83 .flags = IORESOURCE_IO,
86 static struct resource pcit_io_resources[] = {
91 .flags = IORESOURCE_BUSY
96 .flags = IORESOURCE_BUSY
101 .flags = IORESOURCE_BUSY
105 .name = "dma page reg",
106 .flags = IORESOURCE_BUSY
111 .flags = IORESOURCE_BUSY
115 .name = "PCI config addr",
116 .flags = IORESOURCE_BUSY
120 .name = "PCI config data",
121 .flags = IORESOURCE_BUSY
125 static struct resource sni_mem_resource = {
126 .start = 0x18000000UL,
128 .name = "PCIT PCI MEM",
129 .flags = IORESOURCE_MEM
132 static void __init sni_pcit_resource_init(void)
136 /* request I/O space for devices used on all i[345]86 PCs */
137 for (i = 0; i < ARRAY_SIZE(pcit_io_resources); i++)
138 request_resource(&sni_io_resource, pcit_io_resources + i);
142 extern struct pci_ops sni_pcit_ops;
144 static struct pci_controller sni_pcit_controller = {
145 .pci_ops = &sni_pcit_ops,
146 .mem_resource = &sni_mem_resource,
147 .mem_offset = 0x00000000UL,
148 .io_resource = &sni_io_resource,
149 .io_offset = 0x00000000UL,
150 .io_map_base = SNI_PORT_BASE
153 static void enable_pcit_irq(unsigned int irq)
155 u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
157 *(volatile u32 *)SNI_PCIT_INT_REG |= mask;
160 void disable_pcit_irq(unsigned int irq)
162 u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
164 *(volatile u32 *)SNI_PCIT_INT_REG &= ~mask;
167 void end_pcit_irq(unsigned int irq)
169 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
170 enable_pcit_irq(irq);
173 static struct irq_chip pcit_irq_type = {
175 .ack = disable_pcit_irq,
176 .mask = disable_pcit_irq,
177 .mask_ack = disable_pcit_irq,
178 .unmask = enable_pcit_irq,
182 static void pcit_hwint1(void)
184 u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
187 clear_c0_status(IE_IRQ1);
188 irq = ffs((pending >> 16) & 0x7f);
191 do_IRQ(irq + SNI_PCIT_INT_START - 1);
192 set_c0_status(IE_IRQ1);
195 static void pcit_hwint0(void)
197 u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
200 clear_c0_status(IE_IRQ0);
201 irq = ffs((pending >> 16) & 0x3f);
204 do_IRQ(irq + SNI_PCIT_INT_START - 1);
205 set_c0_status(IE_IRQ0);
208 static void sni_pcit_hwint(void)
210 u32 pending = read_c0_cause() & read_c0_status();
212 if (pending & C_IRQ1)
214 else if (pending & C_IRQ2)
215 do_IRQ(MIPS_CPU_IRQ_BASE + 4);
216 else if (pending & C_IRQ3)
217 do_IRQ(MIPS_CPU_IRQ_BASE + 5);
218 else if (pending & C_IRQ5)
219 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
222 static void sni_pcit_hwint_cplus(void)
224 u32 pending = read_c0_cause() & read_c0_status();
226 if (pending & C_IRQ0)
228 else if (pending & C_IRQ1)
229 do_IRQ(MIPS_CPU_IRQ_BASE + 3);
230 else if (pending & C_IRQ2)
231 do_IRQ(MIPS_CPU_IRQ_BASE + 4);
232 else if (pending & C_IRQ3)
233 do_IRQ(MIPS_CPU_IRQ_BASE + 5);
234 else if (pending & C_IRQ5)
235 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
238 void __init sni_pcit_irq_init(void)
243 for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
244 set_irq_chip(i, &pcit_irq_type);
245 *(volatile u32 *)SNI_PCIT_INT_REG = 0;
246 sni_hwint = sni_pcit_hwint;
247 change_c0_status(ST0_IM, IE_IRQ1);
248 setup_irq(SNI_PCIT_INT_START + 6, &sni_isa_irq);
251 void __init sni_pcit_cplus_irq_init(void)
256 for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
257 set_irq_chip(i, &pcit_irq_type);
258 *(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000;
259 sni_hwint = sni_pcit_hwint_cplus;
260 change_c0_status(ST0_IM, IE_IRQ0);
261 setup_irq(MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq);
264 void __init sni_pcit_init(void)
266 ioport_resource.end = sni_io_resource.end;
268 PCIBIOS_MIN_IO = 0x9000;
269 register_pci_controller(&sni_pcit_controller);
271 sni_pcit_resource_init();
274 static int __init snirm_pcit_setup_devinit(void)
276 switch (sni_brd_type) {
277 case SNI_BRD_PCI_TOWER:
278 platform_device_register(&pcit_serial8250_device);
279 platform_device_register(&pcit_cmos_device);
282 case SNI_BRD_PCI_TOWER_CPLUS:
283 platform_device_register(&pcit_cplus_serial8250_device);
284 platform_device_register(&pcit_cmos_device);
290 device_initcall(snirm_pcit_setup_devinit);