1c066a32aSThomas Bogendoerfer /* 2c066a32aSThomas Bogendoerfer * PCI Tower specific code 3c066a32aSThomas Bogendoerfer * 4c066a32aSThomas Bogendoerfer * This file is subject to the terms and conditions of the GNU General Public 5c066a32aSThomas Bogendoerfer * License. See the file "COPYING" in the main directory of this archive 6c066a32aSThomas Bogendoerfer * for more details. 7c066a32aSThomas Bogendoerfer * 8c066a32aSThomas Bogendoerfer * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) 9c066a32aSThomas Bogendoerfer */ 10c066a32aSThomas Bogendoerfer 11c066a32aSThomas Bogendoerfer #include <linux/init.h> 12c066a32aSThomas Bogendoerfer #include <linux/interrupt.h> 13c066a32aSThomas Bogendoerfer #include <linux/pci.h> 14c066a32aSThomas Bogendoerfer #include <linux/serial_8250.h> 15c066a32aSThomas Bogendoerfer 16c066a32aSThomas Bogendoerfer #include <asm/sni.h> 17c066a32aSThomas Bogendoerfer #include <asm/time.h> 18c066a32aSThomas Bogendoerfer #include <asm/irq_cpu.h> 19c066a32aSThomas Bogendoerfer 20c066a32aSThomas Bogendoerfer 21c066a32aSThomas Bogendoerfer #define PORT(_base,_irq) \ 22c066a32aSThomas Bogendoerfer { \ 23c066a32aSThomas Bogendoerfer .iobase = _base, \ 24c066a32aSThomas Bogendoerfer .irq = _irq, \ 25c066a32aSThomas Bogendoerfer .uartclk = 1843200, \ 26c066a32aSThomas Bogendoerfer .iotype = UPIO_PORT, \ 27c066a32aSThomas Bogendoerfer .flags = UPF_BOOT_AUTOCONF, \ 28c066a32aSThomas Bogendoerfer } 29c066a32aSThomas Bogendoerfer 30c066a32aSThomas Bogendoerfer static struct plat_serial8250_port pcit_data[] = { 31c066a32aSThomas Bogendoerfer PORT(0x3f8, 0), 32c066a32aSThomas Bogendoerfer PORT(0x2f8, 3), 33c066a32aSThomas Bogendoerfer { }, 34c066a32aSThomas Bogendoerfer }; 35c066a32aSThomas Bogendoerfer 36c066a32aSThomas Bogendoerfer static struct platform_device pcit_serial8250_device = { 37c066a32aSThomas Bogendoerfer .name = "serial8250", 38c066a32aSThomas Bogendoerfer .id = PLAT8250_DEV_PLATFORM, 39c066a32aSThomas Bogendoerfer .dev = { 40c066a32aSThomas Bogendoerfer .platform_data = pcit_data, 41c066a32aSThomas Bogendoerfer }, 42c066a32aSThomas Bogendoerfer }; 43c066a32aSThomas Bogendoerfer 44c066a32aSThomas Bogendoerfer static struct plat_serial8250_port pcit_cplus_data[] = { 45bea77175SThomas Bogendoerfer PORT(0x3f8, 0), 46c066a32aSThomas Bogendoerfer PORT(0x2f8, 3), 47c066a32aSThomas Bogendoerfer PORT(0x3e8, 4), 48c066a32aSThomas Bogendoerfer PORT(0x2e8, 3), 49c066a32aSThomas Bogendoerfer { }, 50c066a32aSThomas Bogendoerfer }; 51c066a32aSThomas Bogendoerfer 52c066a32aSThomas Bogendoerfer static struct platform_device pcit_cplus_serial8250_device = { 53c066a32aSThomas Bogendoerfer .name = "serial8250", 54c066a32aSThomas Bogendoerfer .id = PLAT8250_DEV_PLATFORM, 55c066a32aSThomas Bogendoerfer .dev = { 56c066a32aSThomas Bogendoerfer .platform_data = pcit_cplus_data, 57c066a32aSThomas Bogendoerfer }, 58c066a32aSThomas Bogendoerfer }; 59c066a32aSThomas Bogendoerfer 6006cf5583SThomas Bogendoerfer static struct resource pcit_cmos_rsrc[] = { 6106cf5583SThomas Bogendoerfer { 6206cf5583SThomas Bogendoerfer .start = 0x70, 6306cf5583SThomas Bogendoerfer .end = 0x71, 6406cf5583SThomas Bogendoerfer .flags = IORESOURCE_IO 6506cf5583SThomas Bogendoerfer }, 6606cf5583SThomas Bogendoerfer { 6706cf5583SThomas Bogendoerfer .start = 8, 6806cf5583SThomas Bogendoerfer .end = 8, 6906cf5583SThomas Bogendoerfer .flags = IORESOURCE_IRQ 7006cf5583SThomas Bogendoerfer } 7106cf5583SThomas Bogendoerfer }; 7206cf5583SThomas Bogendoerfer 7306cf5583SThomas Bogendoerfer static struct platform_device pcit_cmos_device = { 7406cf5583SThomas Bogendoerfer .name = "rtc_cmos", 7506cf5583SThomas Bogendoerfer .num_resources = ARRAY_SIZE(pcit_cmos_rsrc), 7606cf5583SThomas Bogendoerfer .resource = pcit_cmos_rsrc 7706cf5583SThomas Bogendoerfer }; 7806cf5583SThomas Bogendoerfer 79c066a32aSThomas Bogendoerfer static struct resource sni_io_resource = { 80bea77175SThomas Bogendoerfer .start = 0x00000000UL, 81c066a32aSThomas Bogendoerfer .end = 0x03bfffffUL, 82bea77175SThomas Bogendoerfer .name = "PCIT IO", 83c066a32aSThomas Bogendoerfer .flags = IORESOURCE_IO, 84c066a32aSThomas Bogendoerfer }; 85c066a32aSThomas Bogendoerfer 86c066a32aSThomas Bogendoerfer static struct resource pcit_io_resources[] = { 87c066a32aSThomas Bogendoerfer { 88c066a32aSThomas Bogendoerfer .start = 0x00, 89c066a32aSThomas Bogendoerfer .end = 0x1f, 90c066a32aSThomas Bogendoerfer .name = "dma1", 91c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 92c066a32aSThomas Bogendoerfer }, { 93c066a32aSThomas Bogendoerfer .start = 0x40, 94c066a32aSThomas Bogendoerfer .end = 0x5f, 95c066a32aSThomas Bogendoerfer .name = "timer", 96c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 97c066a32aSThomas Bogendoerfer }, { 98c066a32aSThomas Bogendoerfer .start = 0x60, 99c066a32aSThomas Bogendoerfer .end = 0x6f, 100c066a32aSThomas Bogendoerfer .name = "keyboard", 101c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 102c066a32aSThomas Bogendoerfer }, { 103c066a32aSThomas Bogendoerfer .start = 0x80, 104c066a32aSThomas Bogendoerfer .end = 0x8f, 105c066a32aSThomas Bogendoerfer .name = "dma page reg", 106c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 107c066a32aSThomas Bogendoerfer }, { 108c066a32aSThomas Bogendoerfer .start = 0xc0, 109c066a32aSThomas Bogendoerfer .end = 0xdf, 110c066a32aSThomas Bogendoerfer .name = "dma2", 111c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 112c066a32aSThomas Bogendoerfer }, { 113bea77175SThomas Bogendoerfer .start = 0xcf8, 114bea77175SThomas Bogendoerfer .end = 0xcfb, 115bea77175SThomas Bogendoerfer .name = "PCI config addr", 116bea77175SThomas Bogendoerfer .flags = IORESOURCE_BUSY 117bea77175SThomas Bogendoerfer }, { 118c066a32aSThomas Bogendoerfer .start = 0xcfc, 119c066a32aSThomas Bogendoerfer .end = 0xcff, 120c066a32aSThomas Bogendoerfer .name = "PCI config data", 121c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 122c066a32aSThomas Bogendoerfer } 123c066a32aSThomas Bogendoerfer }; 124c066a32aSThomas Bogendoerfer 125c066a32aSThomas Bogendoerfer static struct resource sni_mem_resource = { 126bea77175SThomas Bogendoerfer .start = 0x18000000UL, 127bea77175SThomas Bogendoerfer .end = 0x1fbfffffUL, 128c066a32aSThomas Bogendoerfer .name = "PCIT PCI MEM", 129c066a32aSThomas Bogendoerfer .flags = IORESOURCE_MEM 130c066a32aSThomas Bogendoerfer }; 131c066a32aSThomas Bogendoerfer 132c066a32aSThomas Bogendoerfer static void __init sni_pcit_resource_init(void) 133c066a32aSThomas Bogendoerfer { 134c066a32aSThomas Bogendoerfer int i; 135c066a32aSThomas Bogendoerfer 136c066a32aSThomas Bogendoerfer /* request I/O space for devices used on all i[345]86 PCs */ 137c066a32aSThomas Bogendoerfer for (i = 0; i < ARRAY_SIZE(pcit_io_resources); i++) 138bea77175SThomas Bogendoerfer request_resource(&sni_io_resource, pcit_io_resources + i); 139c066a32aSThomas Bogendoerfer } 140c066a32aSThomas Bogendoerfer 141c066a32aSThomas Bogendoerfer 142c066a32aSThomas Bogendoerfer extern struct pci_ops sni_pcit_ops; 143c066a32aSThomas Bogendoerfer 144c066a32aSThomas Bogendoerfer static struct pci_controller sni_pcit_controller = { 145c066a32aSThomas Bogendoerfer .pci_ops = &sni_pcit_ops, 146c066a32aSThomas Bogendoerfer .mem_resource = &sni_mem_resource, 147bea77175SThomas Bogendoerfer .mem_offset = 0x00000000UL, 148c066a32aSThomas Bogendoerfer .io_resource = &sni_io_resource, 149bea77175SThomas Bogendoerfer .io_offset = 0x00000000UL, 150bea77175SThomas Bogendoerfer .io_map_base = SNI_PORT_BASE 151c066a32aSThomas Bogendoerfer }; 152c066a32aSThomas Bogendoerfer 153c066a32aSThomas Bogendoerfer static void enable_pcit_irq(unsigned int irq) 154c066a32aSThomas Bogendoerfer { 155c066a32aSThomas Bogendoerfer u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24); 156c066a32aSThomas Bogendoerfer 157c066a32aSThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG |= mask; 158c066a32aSThomas Bogendoerfer } 159c066a32aSThomas Bogendoerfer 160c066a32aSThomas Bogendoerfer void disable_pcit_irq(unsigned int irq) 161c066a32aSThomas Bogendoerfer { 162c066a32aSThomas Bogendoerfer u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24); 163c066a32aSThomas Bogendoerfer 164c066a32aSThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG &= ~mask; 165c066a32aSThomas Bogendoerfer } 166c066a32aSThomas Bogendoerfer 167c066a32aSThomas Bogendoerfer void end_pcit_irq(unsigned int irq) 168c066a32aSThomas Bogendoerfer { 169c066a32aSThomas Bogendoerfer if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) 170c066a32aSThomas Bogendoerfer enable_pcit_irq(irq); 171c066a32aSThomas Bogendoerfer } 172c066a32aSThomas Bogendoerfer 173c066a32aSThomas Bogendoerfer static struct irq_chip pcit_irq_type = { 174c066a32aSThomas Bogendoerfer .typename = "PCIT", 175c066a32aSThomas Bogendoerfer .ack = disable_pcit_irq, 176c066a32aSThomas Bogendoerfer .mask = disable_pcit_irq, 177c066a32aSThomas Bogendoerfer .mask_ack = disable_pcit_irq, 178c066a32aSThomas Bogendoerfer .unmask = enable_pcit_irq, 179c066a32aSThomas Bogendoerfer .end = end_pcit_irq, 180c066a32aSThomas Bogendoerfer }; 181c066a32aSThomas Bogendoerfer 182c066a32aSThomas Bogendoerfer static void pcit_hwint1(void) 183c066a32aSThomas Bogendoerfer { 184c066a32aSThomas Bogendoerfer u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG; 185c066a32aSThomas Bogendoerfer int irq; 186c066a32aSThomas Bogendoerfer 187c066a32aSThomas Bogendoerfer clear_c0_status(IE_IRQ1); 188c066a32aSThomas Bogendoerfer irq = ffs((pending >> 16) & 0x7f); 189c066a32aSThomas Bogendoerfer 190c066a32aSThomas Bogendoerfer if (likely(irq > 0)) 191c066a32aSThomas Bogendoerfer do_IRQ (irq + SNI_PCIT_INT_START - 1); 192c066a32aSThomas Bogendoerfer set_c0_status (IE_IRQ1); 193c066a32aSThomas Bogendoerfer } 194c066a32aSThomas Bogendoerfer 195c066a32aSThomas Bogendoerfer static void pcit_hwint0(void) 196c066a32aSThomas Bogendoerfer { 197c066a32aSThomas Bogendoerfer u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG; 198c066a32aSThomas Bogendoerfer int irq; 199c066a32aSThomas Bogendoerfer 200c066a32aSThomas Bogendoerfer clear_c0_status(IE_IRQ0); 201bea77175SThomas Bogendoerfer irq = ffs((pending >> 16) & 0x3f); 202c066a32aSThomas Bogendoerfer 203c066a32aSThomas Bogendoerfer if (likely(irq > 0)) 204c066a32aSThomas Bogendoerfer do_IRQ (irq + SNI_PCIT_INT_START - 1); 205c066a32aSThomas Bogendoerfer set_c0_status (IE_IRQ0); 206c066a32aSThomas Bogendoerfer } 207c066a32aSThomas Bogendoerfer 208c066a32aSThomas Bogendoerfer static void sni_pcit_hwint(void) 209c066a32aSThomas Bogendoerfer { 210119537c0SThiemo Seufer u32 pending = read_c0_cause() & read_c0_status(); 211c066a32aSThomas Bogendoerfer 212c066a32aSThomas Bogendoerfer if (pending & C_IRQ1) 213c066a32aSThomas Bogendoerfer pcit_hwint1(); 214c066a32aSThomas Bogendoerfer else if (pending & C_IRQ2) 215f13cc01dSThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 4); 216c066a32aSThomas Bogendoerfer else if (pending & C_IRQ3) 217f13cc01dSThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 5); 218c066a32aSThomas Bogendoerfer else if (pending & C_IRQ5) 219f13cc01dSThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 7); 220c066a32aSThomas Bogendoerfer } 221c066a32aSThomas Bogendoerfer 222c066a32aSThomas Bogendoerfer static void sni_pcit_hwint_cplus(void) 223c066a32aSThomas Bogendoerfer { 224119537c0SThiemo Seufer u32 pending = read_c0_cause() & read_c0_status(); 225c066a32aSThomas Bogendoerfer 226c066a32aSThomas Bogendoerfer if (pending & C_IRQ0) 227c066a32aSThomas Bogendoerfer pcit_hwint0(); 228bea77175SThomas Bogendoerfer else if (pending & C_IRQ1) 229bea77175SThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 3); 230c066a32aSThomas Bogendoerfer else if (pending & C_IRQ2) 231f13cc01dSThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 4); 232c066a32aSThomas Bogendoerfer else if (pending & C_IRQ3) 233f13cc01dSThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 5); 234c066a32aSThomas Bogendoerfer else if (pending & C_IRQ5) 235f13cc01dSThomas Bogendoerfer do_IRQ (MIPS_CPU_IRQ_BASE + 7); 236c066a32aSThomas Bogendoerfer } 237c066a32aSThomas Bogendoerfer 238c066a32aSThomas Bogendoerfer void __init sni_pcit_irq_init(void) 239c066a32aSThomas Bogendoerfer { 240c066a32aSThomas Bogendoerfer int i; 241c066a32aSThomas Bogendoerfer 242c066a32aSThomas Bogendoerfer mips_cpu_irq_init(); 243c066a32aSThomas Bogendoerfer for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++) 244c066a32aSThomas Bogendoerfer set_irq_chip(i, &pcit_irq_type); 245c066a32aSThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG = 0; 246c066a32aSThomas Bogendoerfer sni_hwint = sni_pcit_hwint; 247c066a32aSThomas Bogendoerfer change_c0_status(ST0_IM, IE_IRQ1); 248c066a32aSThomas Bogendoerfer setup_irq (SNI_PCIT_INT_START + 6, &sni_isa_irq); 249c066a32aSThomas Bogendoerfer } 250c066a32aSThomas Bogendoerfer 251c066a32aSThomas Bogendoerfer void __init sni_pcit_cplus_irq_init(void) 252c066a32aSThomas Bogendoerfer { 253c066a32aSThomas Bogendoerfer int i; 254c066a32aSThomas Bogendoerfer 255c066a32aSThomas Bogendoerfer mips_cpu_irq_init(); 256c066a32aSThomas Bogendoerfer for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++) 257c066a32aSThomas Bogendoerfer set_irq_chip(i, &pcit_irq_type); 258bea77175SThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000; 259c066a32aSThomas Bogendoerfer sni_hwint = sni_pcit_hwint_cplus; 260c066a32aSThomas Bogendoerfer change_c0_status(ST0_IM, IE_IRQ0); 261bea77175SThomas Bogendoerfer setup_irq (MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq); 262c066a32aSThomas Bogendoerfer } 263c066a32aSThomas Bogendoerfer 26406cf5583SThomas Bogendoerfer void __init sni_pcit_init(void) 265c066a32aSThomas Bogendoerfer { 266c066a32aSThomas Bogendoerfer board_time_init = sni_cpu_time_init; 267bea77175SThomas Bogendoerfer ioport_resource.end = sni_io_resource.end; 268c066a32aSThomas Bogendoerfer #ifdef CONFIG_PCI 269bea77175SThomas Bogendoerfer PCIBIOS_MIN_IO = 0x9000; 270c066a32aSThomas Bogendoerfer register_pci_controller(&sni_pcit_controller); 271c066a32aSThomas Bogendoerfer #endif 272bea77175SThomas Bogendoerfer sni_pcit_resource_init(); 273c066a32aSThomas Bogendoerfer } 274c066a32aSThomas Bogendoerfer 275c066a32aSThomas Bogendoerfer static int __init snirm_pcit_setup_devinit(void) 276c066a32aSThomas Bogendoerfer { 277c066a32aSThomas Bogendoerfer switch (sni_brd_type) { 278c066a32aSThomas Bogendoerfer case SNI_BRD_PCI_TOWER: 279c066a32aSThomas Bogendoerfer platform_device_register(&pcit_serial8250_device); 28006cf5583SThomas Bogendoerfer platform_device_register(&pcit_cmos_device); 281c066a32aSThomas Bogendoerfer break; 282c066a32aSThomas Bogendoerfer 283c066a32aSThomas Bogendoerfer case SNI_BRD_PCI_TOWER_CPLUS: 284c066a32aSThomas Bogendoerfer platform_device_register(&pcit_cplus_serial8250_device); 28506cf5583SThomas Bogendoerfer platform_device_register(&pcit_cmos_device); 286c066a32aSThomas Bogendoerfer break; 287c066a32aSThomas Bogendoerfer } 288c066a32aSThomas Bogendoerfer return 0; 289c066a32aSThomas Bogendoerfer } 290c066a32aSThomas Bogendoerfer 291c066a32aSThomas Bogendoerfer device_initcall(snirm_pcit_setup_devinit); 292