Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 1 | /* |
| 2 | * PCI Tower specific code |
| 3 | * |
| 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 |
| 6 | * for more details. |
| 7 | * |
| 8 | * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) |
| 9 | */ |
| 10 | |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/pci.h> |
| 14 | #include <linux/serial_8250.h> |
| 15 | |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 16 | #include <asm/sni.h> |
| 17 | #include <asm/time.h> |
| 18 | #include <asm/irq_cpu.h> |
| 19 | |
| 20 | |
| 21 | #define PORT(_base,_irq) \ |
| 22 | { \ |
| 23 | .iobase = _base, \ |
| 24 | .irq = _irq, \ |
| 25 | .uartclk = 1843200, \ |
| 26 | .iotype = UPIO_PORT, \ |
| 27 | .flags = UPF_BOOT_AUTOCONF, \ |
| 28 | } |
| 29 | |
| 30 | static struct plat_serial8250_port pcit_data[] = { |
| 31 | PORT(0x3f8, 0), |
| 32 | PORT(0x2f8, 3), |
| 33 | { }, |
| 34 | }; |
| 35 | |
| 36 | static struct platform_device pcit_serial8250_device = { |
| 37 | .name = "serial8250", |
| 38 | .id = PLAT8250_DEV_PLATFORM, |
| 39 | .dev = { |
| 40 | .platform_data = pcit_data, |
| 41 | }, |
| 42 | }; |
| 43 | |
| 44 | static struct plat_serial8250_port pcit_cplus_data[] = { |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 45 | PORT(0x3f8, 0), |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 46 | PORT(0x2f8, 3), |
| 47 | PORT(0x3e8, 4), |
| 48 | PORT(0x2e8, 3), |
| 49 | { }, |
| 50 | }; |
| 51 | |
| 52 | static struct platform_device pcit_cplus_serial8250_device = { |
| 53 | .name = "serial8250", |
| 54 | .id = PLAT8250_DEV_PLATFORM, |
| 55 | .dev = { |
| 56 | .platform_data = pcit_cplus_data, |
| 57 | }, |
| 58 | }; |
| 59 | |
Thomas Bogendoerfer | 06cf558 | 2007-06-20 23:36:47 +0200 | [diff] [blame] | 60 | static struct resource pcit_cmos_rsrc[] = { |
| 61 | { |
| 62 | .start = 0x70, |
| 63 | .end = 0x71, |
| 64 | .flags = IORESOURCE_IO |
| 65 | }, |
| 66 | { |
| 67 | .start = 8, |
| 68 | .end = 8, |
| 69 | .flags = IORESOURCE_IRQ |
| 70 | } |
| 71 | }; |
| 72 | |
| 73 | static struct platform_device pcit_cmos_device = { |
| 74 | .name = "rtc_cmos", |
| 75 | .num_resources = ARRAY_SIZE(pcit_cmos_rsrc), |
| 76 | .resource = pcit_cmos_rsrc |
| 77 | }; |
| 78 | |
Ralf Baechle | 19388fb | 2008-01-29 10:14:57 +0000 | [diff] [blame] | 79 | static struct platform_device pcit_pcspeaker_pdev = { |
| 80 | .name = "pcspkr", |
| 81 | .id = -1, |
| 82 | }; |
| 83 | |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 84 | static struct resource sni_io_resource = { |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 85 | .start = 0x00000000UL, |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 86 | .end = 0x03bfffffUL, |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 87 | .name = "PCIT IO", |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 88 | .flags = IORESOURCE_IO, |
| 89 | }; |
| 90 | |
| 91 | static struct resource pcit_io_resources[] = { |
| 92 | { |
| 93 | .start = 0x00, |
| 94 | .end = 0x1f, |
| 95 | .name = "dma1", |
| 96 | .flags = IORESOURCE_BUSY |
| 97 | }, { |
| 98 | .start = 0x40, |
| 99 | .end = 0x5f, |
| 100 | .name = "timer", |
| 101 | .flags = IORESOURCE_BUSY |
| 102 | }, { |
| 103 | .start = 0x60, |
| 104 | .end = 0x6f, |
| 105 | .name = "keyboard", |
| 106 | .flags = IORESOURCE_BUSY |
| 107 | }, { |
| 108 | .start = 0x80, |
| 109 | .end = 0x8f, |
| 110 | .name = "dma page reg", |
| 111 | .flags = IORESOURCE_BUSY |
| 112 | }, { |
| 113 | .start = 0xc0, |
| 114 | .end = 0xdf, |
| 115 | .name = "dma2", |
| 116 | .flags = IORESOURCE_BUSY |
| 117 | }, { |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 118 | .start = 0xcf8, |
| 119 | .end = 0xcfb, |
| 120 | .name = "PCI config addr", |
| 121 | .flags = IORESOURCE_BUSY |
| 122 | }, { |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 123 | .start = 0xcfc, |
| 124 | .end = 0xcff, |
| 125 | .name = "PCI config data", |
| 126 | .flags = IORESOURCE_BUSY |
| 127 | } |
| 128 | }; |
| 129 | |
| 130 | static struct resource sni_mem_resource = { |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 131 | .start = 0x18000000UL, |
| 132 | .end = 0x1fbfffffUL, |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 133 | .name = "PCIT PCI MEM", |
| 134 | .flags = IORESOURCE_MEM |
| 135 | }; |
| 136 | |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 137 | static void __init sni_pcit_resource_init(void) |
| 138 | { |
| 139 | int i; |
| 140 | |
| 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++) |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 143 | request_resource(&sni_io_resource, pcit_io_resources + i); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | |
| 147 | extern struct pci_ops sni_pcit_ops; |
| 148 | |
| 149 | static struct pci_controller sni_pcit_controller = { |
| 150 | .pci_ops = &sni_pcit_ops, |
| 151 | .mem_resource = &sni_mem_resource, |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 152 | .mem_offset = 0x00000000UL, |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 153 | .io_resource = &sni_io_resource, |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 154 | .io_offset = 0x00000000UL, |
| 155 | .io_map_base = SNI_PORT_BASE |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 156 | }; |
| 157 | |
| 158 | static void enable_pcit_irq(unsigned int irq) |
| 159 | { |
| 160 | u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24); |
| 161 | |
| 162 | *(volatile u32 *)SNI_PCIT_INT_REG |= mask; |
| 163 | } |
| 164 | |
| 165 | void disable_pcit_irq(unsigned int irq) |
| 166 | { |
| 167 | u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24); |
| 168 | |
| 169 | *(volatile u32 *)SNI_PCIT_INT_REG &= ~mask; |
| 170 | } |
| 171 | |
| 172 | void end_pcit_irq(unsigned int irq) |
| 173 | { |
| 174 | if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) |
| 175 | enable_pcit_irq(irq); |
| 176 | } |
| 177 | |
| 178 | static struct irq_chip pcit_irq_type = { |
Thomas Gleixner | 8922f79 | 2009-11-17 22:51:03 +0000 | [diff] [blame] | 179 | .name = "PCIT", |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 180 | .ack = disable_pcit_irq, |
| 181 | .mask = disable_pcit_irq, |
| 182 | .mask_ack = disable_pcit_irq, |
| 183 | .unmask = enable_pcit_irq, |
| 184 | .end = end_pcit_irq, |
| 185 | }; |
| 186 | |
| 187 | static void pcit_hwint1(void) |
| 188 | { |
| 189 | u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG; |
| 190 | int irq; |
| 191 | |
| 192 | clear_c0_status(IE_IRQ1); |
| 193 | irq = ffs((pending >> 16) & 0x7f); |
| 194 | |
| 195 | if (likely(irq > 0)) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 196 | do_IRQ(irq + SNI_PCIT_INT_START - 1); |
| 197 | set_c0_status(IE_IRQ1); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static void pcit_hwint0(void) |
| 201 | { |
| 202 | u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG; |
| 203 | int irq; |
| 204 | |
| 205 | clear_c0_status(IE_IRQ0); |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 206 | irq = ffs((pending >> 16) & 0x3f); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 207 | |
| 208 | if (likely(irq > 0)) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 209 | do_IRQ(irq + SNI_PCIT_INT_START - 1); |
| 210 | set_c0_status(IE_IRQ0); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | static void sni_pcit_hwint(void) |
| 214 | { |
Thiemo Seufer | 119537c | 2007-03-19 00:13:37 +0000 | [diff] [blame] | 215 | u32 pending = read_c0_cause() & read_c0_status(); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 216 | |
| 217 | if (pending & C_IRQ1) |
| 218 | pcit_hwint1(); |
| 219 | else if (pending & C_IRQ2) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 220 | do_IRQ(MIPS_CPU_IRQ_BASE + 4); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 221 | else if (pending & C_IRQ3) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 222 | do_IRQ(MIPS_CPU_IRQ_BASE + 5); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 223 | else if (pending & C_IRQ5) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 224 | do_IRQ(MIPS_CPU_IRQ_BASE + 7); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | static void sni_pcit_hwint_cplus(void) |
| 228 | { |
Thiemo Seufer | 119537c | 2007-03-19 00:13:37 +0000 | [diff] [blame] | 229 | u32 pending = read_c0_cause() & read_c0_status(); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 230 | |
| 231 | if (pending & C_IRQ0) |
| 232 | pcit_hwint0(); |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 233 | else if (pending & C_IRQ1) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 234 | do_IRQ(MIPS_CPU_IRQ_BASE + 3); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 235 | else if (pending & C_IRQ2) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 236 | do_IRQ(MIPS_CPU_IRQ_BASE + 4); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 237 | else if (pending & C_IRQ3) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 238 | do_IRQ(MIPS_CPU_IRQ_BASE + 5); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 239 | else if (pending & C_IRQ5) |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 240 | do_IRQ(MIPS_CPU_IRQ_BASE + 7); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | void __init sni_pcit_irq_init(void) |
| 244 | { |
| 245 | int i; |
| 246 | |
| 247 | mips_cpu_irq_init(); |
| 248 | for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++) |
Ralf Baechle | c87e090 | 2009-03-30 14:49:44 +0200 | [diff] [blame] | 249 | set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 250 | *(volatile u32 *)SNI_PCIT_INT_REG = 0; |
| 251 | sni_hwint = sni_pcit_hwint; |
| 252 | change_c0_status(ST0_IM, IE_IRQ1); |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 253 | setup_irq(SNI_PCIT_INT_START + 6, &sni_isa_irq); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | void __init sni_pcit_cplus_irq_init(void) |
| 257 | { |
| 258 | int i; |
| 259 | |
| 260 | mips_cpu_irq_init(); |
| 261 | for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++) |
Ralf Baechle | c87e090 | 2009-03-30 14:49:44 +0200 | [diff] [blame] | 262 | set_irq_chip_and_handler(i, &pcit_irq_type, handle_level_irq); |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 263 | *(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000; |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 264 | sni_hwint = sni_pcit_hwint_cplus; |
| 265 | change_c0_status(ST0_IM, IE_IRQ0); |
Ralf Baechle | 49a89ef | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 266 | setup_irq(MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 267 | } |
| 268 | |
Thomas Bogendoerfer | 06cf558 | 2007-06-20 23:36:47 +0200 | [diff] [blame] | 269 | void __init sni_pcit_init(void) |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 270 | { |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 271 | ioport_resource.end = sni_io_resource.end; |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 272 | #ifdef CONFIG_PCI |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 273 | PCIBIOS_MIN_IO = 0x9000; |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 274 | register_pci_controller(&sni_pcit_controller); |
| 275 | #endif |
Thomas Bogendoerfer | bea7717 | 2007-04-08 13:34:57 +0200 | [diff] [blame] | 276 | sni_pcit_resource_init(); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | static int __init snirm_pcit_setup_devinit(void) |
| 280 | { |
| 281 | switch (sni_brd_type) { |
| 282 | case SNI_BRD_PCI_TOWER: |
| 283 | platform_device_register(&pcit_serial8250_device); |
Thomas Bogendoerfer | 06cf558 | 2007-06-20 23:36:47 +0200 | [diff] [blame] | 284 | platform_device_register(&pcit_cmos_device); |
Ralf Baechle | 19388fb | 2008-01-29 10:14:57 +0000 | [diff] [blame] | 285 | platform_device_register(&pcit_pcspeaker_pdev); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 286 | break; |
| 287 | |
| 288 | case SNI_BRD_PCI_TOWER_CPLUS: |
| 289 | platform_device_register(&pcit_cplus_serial8250_device); |
Thomas Bogendoerfer | 06cf558 | 2007-06-20 23:36:47 +0200 | [diff] [blame] | 290 | platform_device_register(&pcit_cmos_device); |
Ralf Baechle | 19388fb | 2008-01-29 10:14:57 +0000 | [diff] [blame] | 291 | platform_device_register(&pcit_pcspeaker_pdev); |
Thomas Bogendoerfer | c066a32 | 2006-12-28 18:22:32 +0100 | [diff] [blame] | 292 | break; |
| 293 | } |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | device_initcall(snirm_pcit_setup_devinit); |