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
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/irq.h>
14 #include <linux/pci.h>
15 #include <linux/serial_8250.h>
19 #include <asm/irq_cpu.h>
22 #define PORT(_base,_irq) \
27 .iotype = UPIO_PORT, \
28 .flags = UPF_BOOT_AUTOCONF, \
31 static struct plat_serial8250_port pcit_data[] = {
37 static struct platform_device pcit_serial8250_device = {
39 .id = PLAT8250_DEV_PLATFORM,
41 .platform_data = pcit_data,
45 static struct plat_serial8250_port pcit_cplus_data[] = {
53 static struct platform_device pcit_cplus_serial8250_device = {
55 .id = PLAT8250_DEV_PLATFORM,
57 .platform_data = pcit_cplus_data,
61 static struct resource pcit_cmos_rsrc[] = {
65 .flags = IORESOURCE_IO
70 .flags = IORESOURCE_IRQ
74 static struct platform_device pcit_cmos_device = {
76 .num_resources = ARRAY_SIZE(pcit_cmos_rsrc),
77 .resource = pcit_cmos_rsrc
80 static struct platform_device pcit_pcspeaker_pdev = {
85 static struct resource sni_io_resource = {
86 .start = 0x00000000UL,
89 .flags = IORESOURCE_IO,
92 static struct resource pcit_io_resources[] = {
97 .flags = IORESOURCE_BUSY
102 .flags = IORESOURCE_BUSY
107 .flags = IORESOURCE_BUSY
111 .name = "dma page reg",
112 .flags = IORESOURCE_BUSY
117 .flags = IORESOURCE_BUSY
121 .name = "PCI config addr",
122 .flags = IORESOURCE_BUSY
126 .name = "PCI config data",
127 .flags = IORESOURCE_BUSY
131 static struct resource sni_mem_resource = {
132 .start = 0x18000000UL,
134 .name = "PCIT PCI MEM",
135 .flags = IORESOURCE_MEM
138 static void __init sni_pcit_resource_init(void)
142 /* request I/O space for devices used on all i[345]86 PCs */
143 for (i = 0; i < ARRAY_SIZE(pcit_io_resources); i++)
144 request_resource(&sni_io_resource, pcit_io_resources + i);
148 extern struct pci_ops sni_pcit_ops;
150 static struct pci_controller sni_pcit_controller = {
151 .pci_ops = &sni_pcit_ops,
152 .mem_resource = &sni_mem_resource,
153 .mem_offset = 0x00000000UL,
154 .io_resource = &sni_io_resource,
155 .io_offset = 0x00000000UL,
156 .io_map_base = SNI_PORT_BASE
159 static void enable_pcit_irq(unsigned int irq)
161 u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
163 *(volatile u32 *)SNI_PCIT_INT_REG |= mask;
166 void disable_pcit_irq(unsigned int irq)
168 u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
170 *(volatile u32 *)SNI_PCIT_INT_REG &= ~mask;
173 void end_pcit_irq(unsigned int irq)
175 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
176 enable_pcit_irq(irq);
179 static struct irq_chip pcit_irq_type = {
181 .ack = disable_pcit_irq,
182 .mask = disable_pcit_irq,
183 .mask_ack = disable_pcit_irq,
184 .unmask = enable_pcit_irq,
188 static void pcit_hwint1(void)
190 u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
193 clear_c0_status(IE_IRQ1);
194 irq = ffs((pending >> 16) & 0x7f);
197 do_IRQ(irq + SNI_PCIT_INT_START - 1);
198 set_c0_status(IE_IRQ1);
201 static void pcit_hwint0(void)
203 u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
206 clear_c0_status(IE_IRQ0);
207 irq = ffs((pending >> 16) & 0x3f);
210 do_IRQ(irq + SNI_PCIT_INT_START - 1);
211 set_c0_status(IE_IRQ0);
214 static void sni_pcit_hwint(void)
216 u32 pending = read_c0_cause() & read_c0_status();
218 if (pending & C_IRQ1)
220 else if (pending & C_IRQ2)
221 do_IRQ(MIPS_CPU_IRQ_BASE + 4);
222 else if (pending & C_IRQ3)
223 do_IRQ(MIPS_CPU_IRQ_BASE + 5);
224 else if (pending & C_IRQ5)
225 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
228 static void sni_pcit_hwint_cplus(void)
230 u32 pending = read_c0_cause() & read_c0_status();
232 if (pending & C_IRQ0)
234 else if (pending & C_IRQ1)
235 do_IRQ(MIPS_CPU_IRQ_BASE + 3);
236 else if (pending & C_IRQ2)
237 do_IRQ(MIPS_CPU_IRQ_BASE + 4);
238 else if (pending & C_IRQ3)
239 do_IRQ(MIPS_CPU_IRQ_BASE + 5);
240 else if (pending & C_IRQ5)
241 do_IRQ(MIPS_CPU_IRQ_BASE + 7);
244 void __init sni_pcit_irq_init(void)
249 for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
250 set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq);
251 *(volatile u32 *)SNI_PCIT_INT_REG = 0;
252 sni_hwint = sni_pcit_hwint;
253 change_c0_status(ST0_IM, IE_IRQ1);
254 setup_irq(SNI_PCIT_INT_START + 6, &sni_isa_irq);
257 void __init sni_pcit_cplus_irq_init(void)
262 for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
263 set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq);
264 *(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000;
265 sni_hwint = sni_pcit_hwint_cplus;
266 change_c0_status(ST0_IM, IE_IRQ0);
267 setup_irq(MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq);
270 void __init sni_pcit_init(void)
272 ioport_resource.end = sni_io_resource.end;
274 PCIBIOS_MIN_IO = 0x9000;
275 register_pci_controller(&sni_pcit_controller);
277 sni_pcit_resource_init();
280 static int __init snirm_pcit_setup_devinit(void)
282 switch (sni_brd_type) {
283 case SNI_BRD_PCI_TOWER:
284 platform_device_register(&pcit_serial8250_device);
285 platform_device_register(&pcit_cmos_device);
286 platform_device_register(&pcit_pcspeaker_pdev);
289 case SNI_BRD_PCI_TOWER_CPLUS:
290 platform_device_register(&pcit_cplus_serial8250_device);
291 platform_device_register(&pcit_cmos_device);
292 platform_device_register(&pcit_pcspeaker_pdev);
298 device_initcall(snirm_pcit_setup_devinit);