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 platform_device pcit_pcspeaker_pdev = {
84 static struct resource sni_io_resource = {
85 .start = 0x00000000UL,
88 .flags = IORESOURCE_IO,
91 static struct resource pcit_io_resources[] = {
96 .flags = IORESOURCE_BUSY
101 .flags = IORESOURCE_BUSY
106 .flags = IORESOURCE_BUSY
110 .name = "dma page reg",
111 .flags = IORESOURCE_BUSY
116 .flags = IORESOURCE_BUSY
120 .name = "PCI config addr",
121 .flags = IORESOURCE_BUSY
125 .name = "PCI config data",
126 .flags = IORESOURCE_BUSY
130 static struct resource sni_mem_resource = {
131 .start = 0x18000000UL,
133 .name = "PCIT PCI MEM",
134 .flags = IORESOURCE_MEM
137 static void __init sni_pcit_resource_init(void)
141 /* request I/O space for devices used on all i[345]86 PCs */
142 for (i = 0; i < ARRAY_SIZE(pcit_io_resources); i++)
143 request_resource(&sni_io_resource, pcit_io_resources + i);
147 extern struct pci_ops sni_pcit_ops;
149 static struct pci_controller sni_pcit_controller = {
150 .pci_ops = &sni_pcit_ops,
151 .mem_resource = &sni_mem_resource,
152 .mem_offset = 0x00000000UL,
153 .io_resource = &sni_io_resource,
154 .io_offset = 0x00000000UL,
155 .io_map_base = SNI_PORT_BASE
158 static void enable_pcit_irq(unsigned int irq)
160 u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
162 *(volatile u32 *)SNI_PCIT_INT_REG |= mask;
165 void disable_pcit_irq(unsigned int irq)
167 u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
169 *(volatile u32 *)SNI_PCIT_INT_REG &= ~mask;
172 void end_pcit_irq(unsigned int irq)
174 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
175 enable_pcit_irq(irq);
178 static struct irq_chip pcit_irq_type = {
180 .ack = disable_pcit_irq,
181 .mask = disable_pcit_irq,
182 .mask_ack = disable_pcit_irq,
183 .unmask = enable_pcit_irq,
187 static void pcit_hwint1(void)
189 u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
192 clear_c0_status(IE_IRQ1);
193 irq = ffs((pending >> 16) & 0x7f);
196 do_IRQ(irq + SNI_PCIT_INT_START - 1);
197 set_c0_status(IE_IRQ1);
200 static void pcit_hwint0(void)
202 u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
205 clear_c0_status(IE_IRQ0);
206 irq = ffs((pending >> 16) & 0x3f);
209 do_IRQ(irq + SNI_PCIT_INT_START - 1);
210 set_c0_status(IE_IRQ0);
213 static void sni_pcit_hwint(void)
215 u32 pending = read_c0_cause() & read_c0_status();
217 if (pending & C_IRQ1)
219 else if (pending & C_IRQ2)
220 do_IRQ(MIPS_CPU_IRQ_BASE + 4);
221 else if (pending & C_IRQ3)
222 do_IRQ(MIPS_CPU_IRQ_BASE + 5);
223 else if (pending & C_IRQ5)
224 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
227 static void sni_pcit_hwint_cplus(void)
229 u32 pending = read_c0_cause() & read_c0_status();
231 if (pending & C_IRQ0)
233 else if (pending & C_IRQ1)
234 do_IRQ(MIPS_CPU_IRQ_BASE + 3);
235 else if (pending & C_IRQ2)
236 do_IRQ(MIPS_CPU_IRQ_BASE + 4);
237 else if (pending & C_IRQ3)
238 do_IRQ(MIPS_CPU_IRQ_BASE + 5);
239 else if (pending & C_IRQ5)
240 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
243 void __init sni_pcit_irq_init(void)
248 for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
249 set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq);
250 *(volatile u32 *)SNI_PCIT_INT_REG = 0;
251 sni_hwint = sni_pcit_hwint;
252 change_c0_status(ST0_IM, IE_IRQ1);
253 setup_irq(SNI_PCIT_INT_START + 6, &sni_isa_irq);
256 void __init sni_pcit_cplus_irq_init(void)
261 for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
262 set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq);
263 *(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000;
264 sni_hwint = sni_pcit_hwint_cplus;
265 change_c0_status(ST0_IM, IE_IRQ0);
266 setup_irq(MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq);
269 void __init sni_pcit_init(void)
271 ioport_resource.end = sni_io_resource.end;
273 PCIBIOS_MIN_IO = 0x9000;
274 register_pci_controller(&sni_pcit_controller);
276 sni_pcit_resource_init();
279 static int __init snirm_pcit_setup_devinit(void)
281 switch (sni_brd_type) {
282 case SNI_BRD_PCI_TOWER:
283 platform_device_register(&pcit_serial8250_device);
284 platform_device_register(&pcit_cmos_device);
285 platform_device_register(&pcit_pcspeaker_pdev);
288 case SNI_BRD_PCI_TOWER_CPLUS:
289 platform_device_register(&pcit_cplus_serial8250_device);
290 platform_device_register(&pcit_cmos_device);
291 platform_device_register(&pcit_pcspeaker_pdev);
297 device_initcall(snirm_pcit_setup_devinit);