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 7919388fb0SRalf Baechle static struct platform_device pcit_pcspeaker_pdev = { 8019388fb0SRalf Baechle .name = "pcspkr", 8119388fb0SRalf Baechle .id = -1, 8219388fb0SRalf Baechle }; 8319388fb0SRalf Baechle 84c066a32aSThomas Bogendoerfer static struct resource sni_io_resource = { 85bea77175SThomas Bogendoerfer .start = 0x00000000UL, 86c066a32aSThomas Bogendoerfer .end = 0x03bfffffUL, 87bea77175SThomas Bogendoerfer .name = "PCIT IO", 88c066a32aSThomas Bogendoerfer .flags = IORESOURCE_IO, 89c066a32aSThomas Bogendoerfer }; 90c066a32aSThomas Bogendoerfer 91c066a32aSThomas Bogendoerfer static struct resource pcit_io_resources[] = { 92c066a32aSThomas Bogendoerfer { 93c066a32aSThomas Bogendoerfer .start = 0x00, 94c066a32aSThomas Bogendoerfer .end = 0x1f, 95c066a32aSThomas Bogendoerfer .name = "dma1", 96c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 97c066a32aSThomas Bogendoerfer }, { 98c066a32aSThomas Bogendoerfer .start = 0x40, 99c066a32aSThomas Bogendoerfer .end = 0x5f, 100c066a32aSThomas Bogendoerfer .name = "timer", 101c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 102c066a32aSThomas Bogendoerfer }, { 103c066a32aSThomas Bogendoerfer .start = 0x60, 104c066a32aSThomas Bogendoerfer .end = 0x6f, 105c066a32aSThomas Bogendoerfer .name = "keyboard", 106c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 107c066a32aSThomas Bogendoerfer }, { 108c066a32aSThomas Bogendoerfer .start = 0x80, 109c066a32aSThomas Bogendoerfer .end = 0x8f, 110c066a32aSThomas Bogendoerfer .name = "dma page reg", 111c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 112c066a32aSThomas Bogendoerfer }, { 113c066a32aSThomas Bogendoerfer .start = 0xc0, 114c066a32aSThomas Bogendoerfer .end = 0xdf, 115c066a32aSThomas Bogendoerfer .name = "dma2", 116c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 117c066a32aSThomas Bogendoerfer }, { 118bea77175SThomas Bogendoerfer .start = 0xcf8, 119bea77175SThomas Bogendoerfer .end = 0xcfb, 120bea77175SThomas Bogendoerfer .name = "PCI config addr", 121bea77175SThomas Bogendoerfer .flags = IORESOURCE_BUSY 122bea77175SThomas Bogendoerfer }, { 123c066a32aSThomas Bogendoerfer .start = 0xcfc, 124c066a32aSThomas Bogendoerfer .end = 0xcff, 125c066a32aSThomas Bogendoerfer .name = "PCI config data", 126c066a32aSThomas Bogendoerfer .flags = IORESOURCE_BUSY 127c066a32aSThomas Bogendoerfer } 128c066a32aSThomas Bogendoerfer }; 129c066a32aSThomas Bogendoerfer 130c066a32aSThomas Bogendoerfer static struct resource sni_mem_resource = { 131bea77175SThomas Bogendoerfer .start = 0x18000000UL, 132bea77175SThomas Bogendoerfer .end = 0x1fbfffffUL, 133c066a32aSThomas Bogendoerfer .name = "PCIT PCI MEM", 134c066a32aSThomas Bogendoerfer .flags = IORESOURCE_MEM 135c066a32aSThomas Bogendoerfer }; 136c066a32aSThomas Bogendoerfer 137c066a32aSThomas Bogendoerfer static void __init sni_pcit_resource_init(void) 138c066a32aSThomas Bogendoerfer { 139c066a32aSThomas Bogendoerfer int i; 140c066a32aSThomas Bogendoerfer 141c066a32aSThomas Bogendoerfer /* request I/O space for devices used on all i[345]86 PCs */ 142c066a32aSThomas Bogendoerfer for (i = 0; i < ARRAY_SIZE(pcit_io_resources); i++) 143bea77175SThomas Bogendoerfer request_resource(&sni_io_resource, pcit_io_resources + i); 144c066a32aSThomas Bogendoerfer } 145c066a32aSThomas Bogendoerfer 146c066a32aSThomas Bogendoerfer 147c066a32aSThomas Bogendoerfer extern struct pci_ops sni_pcit_ops; 148c066a32aSThomas Bogendoerfer 149c066a32aSThomas Bogendoerfer static struct pci_controller sni_pcit_controller = { 150c066a32aSThomas Bogendoerfer .pci_ops = &sni_pcit_ops, 151c066a32aSThomas Bogendoerfer .mem_resource = &sni_mem_resource, 152bea77175SThomas Bogendoerfer .mem_offset = 0x00000000UL, 153c066a32aSThomas Bogendoerfer .io_resource = &sni_io_resource, 154bea77175SThomas Bogendoerfer .io_offset = 0x00000000UL, 155bea77175SThomas Bogendoerfer .io_map_base = SNI_PORT_BASE 156c066a32aSThomas Bogendoerfer }; 157c066a32aSThomas Bogendoerfer 158c066a32aSThomas Bogendoerfer static void enable_pcit_irq(unsigned int irq) 159c066a32aSThomas Bogendoerfer { 160c066a32aSThomas Bogendoerfer u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24); 161c066a32aSThomas Bogendoerfer 162c066a32aSThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG |= mask; 163c066a32aSThomas Bogendoerfer } 164c066a32aSThomas Bogendoerfer 165c066a32aSThomas Bogendoerfer void disable_pcit_irq(unsigned int irq) 166c066a32aSThomas Bogendoerfer { 167c066a32aSThomas Bogendoerfer u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24); 168c066a32aSThomas Bogendoerfer 169c066a32aSThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG &= ~mask; 170c066a32aSThomas Bogendoerfer } 171c066a32aSThomas Bogendoerfer 172c066a32aSThomas Bogendoerfer void end_pcit_irq(unsigned int irq) 173c066a32aSThomas Bogendoerfer { 174c066a32aSThomas Bogendoerfer if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) 175c066a32aSThomas Bogendoerfer enable_pcit_irq(irq); 176c066a32aSThomas Bogendoerfer } 177c066a32aSThomas Bogendoerfer 178c066a32aSThomas Bogendoerfer static struct irq_chip pcit_irq_type = { 1798922f79eSThomas Gleixner .name = "PCIT", 180c066a32aSThomas Bogendoerfer .ack = disable_pcit_irq, 181c066a32aSThomas Bogendoerfer .mask = disable_pcit_irq, 182c066a32aSThomas Bogendoerfer .mask_ack = disable_pcit_irq, 183c066a32aSThomas Bogendoerfer .unmask = enable_pcit_irq, 184c066a32aSThomas Bogendoerfer .end = end_pcit_irq, 185c066a32aSThomas Bogendoerfer }; 186c066a32aSThomas Bogendoerfer 187c066a32aSThomas Bogendoerfer static void pcit_hwint1(void) 188c066a32aSThomas Bogendoerfer { 189c066a32aSThomas Bogendoerfer u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG; 190c066a32aSThomas Bogendoerfer int irq; 191c066a32aSThomas Bogendoerfer 192c066a32aSThomas Bogendoerfer clear_c0_status(IE_IRQ1); 193c066a32aSThomas Bogendoerfer irq = ffs((pending >> 16) & 0x7f); 194c066a32aSThomas Bogendoerfer 195c066a32aSThomas Bogendoerfer if (likely(irq > 0)) 196c066a32aSThomas Bogendoerfer do_IRQ(irq + SNI_PCIT_INT_START - 1); 197c066a32aSThomas Bogendoerfer set_c0_status(IE_IRQ1); 198c066a32aSThomas Bogendoerfer } 199c066a32aSThomas Bogendoerfer 200c066a32aSThomas Bogendoerfer static void pcit_hwint0(void) 201c066a32aSThomas Bogendoerfer { 202c066a32aSThomas Bogendoerfer u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG; 203c066a32aSThomas Bogendoerfer int irq; 204c066a32aSThomas Bogendoerfer 205c066a32aSThomas Bogendoerfer clear_c0_status(IE_IRQ0); 206bea77175SThomas Bogendoerfer irq = ffs((pending >> 16) & 0x3f); 207c066a32aSThomas Bogendoerfer 208c066a32aSThomas Bogendoerfer if (likely(irq > 0)) 209c066a32aSThomas Bogendoerfer do_IRQ(irq + SNI_PCIT_INT_START - 1); 210c066a32aSThomas Bogendoerfer set_c0_status(IE_IRQ0); 211c066a32aSThomas Bogendoerfer } 212c066a32aSThomas Bogendoerfer 213c066a32aSThomas Bogendoerfer static void sni_pcit_hwint(void) 214c066a32aSThomas Bogendoerfer { 215119537c0SThiemo Seufer u32 pending = read_c0_cause() & read_c0_status(); 216c066a32aSThomas Bogendoerfer 217c066a32aSThomas Bogendoerfer if (pending & C_IRQ1) 218c066a32aSThomas Bogendoerfer pcit_hwint1(); 219c066a32aSThomas Bogendoerfer else if (pending & C_IRQ2) 220f13cc01dSThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 4); 221c066a32aSThomas Bogendoerfer else if (pending & C_IRQ3) 222f13cc01dSThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 5); 223c066a32aSThomas Bogendoerfer else if (pending & C_IRQ5) 224f13cc01dSThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 7); 225c066a32aSThomas Bogendoerfer } 226c066a32aSThomas Bogendoerfer 227c066a32aSThomas Bogendoerfer static void sni_pcit_hwint_cplus(void) 228c066a32aSThomas Bogendoerfer { 229119537c0SThiemo Seufer u32 pending = read_c0_cause() & read_c0_status(); 230c066a32aSThomas Bogendoerfer 231c066a32aSThomas Bogendoerfer if (pending & C_IRQ0) 232c066a32aSThomas Bogendoerfer pcit_hwint0(); 233bea77175SThomas Bogendoerfer else if (pending & C_IRQ1) 234bea77175SThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 3); 235c066a32aSThomas Bogendoerfer else if (pending & C_IRQ2) 236f13cc01dSThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 4); 237c066a32aSThomas Bogendoerfer else if (pending & C_IRQ3) 238f13cc01dSThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 5); 239c066a32aSThomas Bogendoerfer else if (pending & C_IRQ5) 240f13cc01dSThomas Bogendoerfer do_IRQ(MIPS_CPU_IRQ_BASE + 7); 241c066a32aSThomas Bogendoerfer } 242c066a32aSThomas Bogendoerfer 243c066a32aSThomas Bogendoerfer void __init sni_pcit_irq_init(void) 244c066a32aSThomas Bogendoerfer { 245c066a32aSThomas Bogendoerfer int i; 246c066a32aSThomas Bogendoerfer 247c066a32aSThomas Bogendoerfer mips_cpu_irq_init(); 248c066a32aSThomas Bogendoerfer for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++) 249c87e0909SRalf Baechle set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq); 250c066a32aSThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG = 0; 251c066a32aSThomas Bogendoerfer sni_hwint = sni_pcit_hwint; 252c066a32aSThomas Bogendoerfer change_c0_status(ST0_IM, IE_IRQ1); 253c066a32aSThomas Bogendoerfer setup_irq(SNI_PCIT_INT_START + 6, &sni_isa_irq); 254c066a32aSThomas Bogendoerfer } 255c066a32aSThomas Bogendoerfer 256c066a32aSThomas Bogendoerfer void __init sni_pcit_cplus_irq_init(void) 257c066a32aSThomas Bogendoerfer { 258c066a32aSThomas Bogendoerfer int i; 259c066a32aSThomas Bogendoerfer 260c066a32aSThomas Bogendoerfer mips_cpu_irq_init(); 261c066a32aSThomas Bogendoerfer for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++) 262c87e0909SRalf Baechle set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq); 263bea77175SThomas Bogendoerfer *(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000; 264c066a32aSThomas Bogendoerfer sni_hwint = sni_pcit_hwint_cplus; 265c066a32aSThomas Bogendoerfer change_c0_status(ST0_IM, IE_IRQ0); 266bea77175SThomas Bogendoerfer setup_irq(MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq); 267c066a32aSThomas Bogendoerfer } 268c066a32aSThomas Bogendoerfer 26906cf5583SThomas Bogendoerfer void __init sni_pcit_init(void) 270c066a32aSThomas Bogendoerfer { 271bea77175SThomas Bogendoerfer ioport_resource.end = sni_io_resource.end; 272c066a32aSThomas Bogendoerfer #ifdef CONFIG_PCI 273bea77175SThomas Bogendoerfer PCIBIOS_MIN_IO = 0x9000; 274c066a32aSThomas Bogendoerfer register_pci_controller(&sni_pcit_controller); 275c066a32aSThomas Bogendoerfer #endif 276bea77175SThomas Bogendoerfer sni_pcit_resource_init(); 277c066a32aSThomas Bogendoerfer } 278c066a32aSThomas Bogendoerfer 279c066a32aSThomas Bogendoerfer static int __init snirm_pcit_setup_devinit(void) 280c066a32aSThomas Bogendoerfer { 281c066a32aSThomas Bogendoerfer switch (sni_brd_type) { 282c066a32aSThomas Bogendoerfer case SNI_BRD_PCI_TOWER: 283c066a32aSThomas Bogendoerfer platform_device_register(&pcit_serial8250_device); 28406cf5583SThomas Bogendoerfer platform_device_register(&pcit_cmos_device); 28519388fb0SRalf Baechle platform_device_register(&pcit_pcspeaker_pdev); 286c066a32aSThomas Bogendoerfer break; 287c066a32aSThomas Bogendoerfer 288c066a32aSThomas Bogendoerfer case SNI_BRD_PCI_TOWER_CPLUS: 289c066a32aSThomas Bogendoerfer platform_device_register(&pcit_cplus_serial8250_device); 29006cf5583SThomas Bogendoerfer platform_device_register(&pcit_cmos_device); 29119388fb0SRalf Baechle platform_device_register(&pcit_pcspeaker_pdev); 292c066a32aSThomas Bogendoerfer break; 293c066a32aSThomas Bogendoerfer } 294c066a32aSThomas Bogendoerfer return 0; 295c066a32aSThomas Bogendoerfer } 296c066a32aSThomas Bogendoerfer 297c066a32aSThomas Bogendoerfer device_initcall(snirm_pcit_setup_devinit); 298