1 /* 2 * QEMU IDE Emulation: PCI cmd646 support. 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * Copyright (c) 2006 Openedhand Ltd. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "hw/pci/pci.h" 28 #include "hw/qdev-properties.h" 29 #include "migration/vmstate.h" 30 #include "qemu/module.h" 31 #include "hw/isa/isa.h" 32 #include "sysemu/dma.h" 33 #include "sysemu/reset.h" 34 35 #include "hw/ide/pci.h" 36 #include "trace.h" 37 38 /* CMD646 specific */ 39 #define CFR 0x50 40 #define CFR_INTR_CH0 0x04 41 #define CNTRL 0x51 42 #define CNTRL_EN_CH0 0x04 43 #define CNTRL_EN_CH1 0x08 44 #define ARTTIM23 0x57 45 #define ARTTIM23_INTR_CH1 0x10 46 #define MRDMODE 0x71 47 #define MRDMODE_INTR_CH0 0x04 48 #define MRDMODE_INTR_CH1 0x08 49 #define MRDMODE_BLK_CH0 0x10 50 #define MRDMODE_BLK_CH1 0x20 51 #define UDIDETCR0 0x73 52 #define UDIDETCR1 0x7B 53 54 static void cmd646_update_irq(PCIDevice *pd); 55 56 static void cmd646_update_dma_interrupts(PCIDevice *pd) 57 { 58 /* Sync DMA interrupt status from UDMA interrupt status */ 59 if (pd->config[MRDMODE] & MRDMODE_INTR_CH0) { 60 pd->config[CFR] |= CFR_INTR_CH0; 61 } else { 62 pd->config[CFR] &= ~CFR_INTR_CH0; 63 } 64 65 if (pd->config[MRDMODE] & MRDMODE_INTR_CH1) { 66 pd->config[ARTTIM23] |= ARTTIM23_INTR_CH1; 67 } else { 68 pd->config[ARTTIM23] &= ~ARTTIM23_INTR_CH1; 69 } 70 } 71 72 static void cmd646_update_udma_interrupts(PCIDevice *pd) 73 { 74 /* Sync UDMA interrupt status from DMA interrupt status */ 75 if (pd->config[CFR] & CFR_INTR_CH0) { 76 pd->config[MRDMODE] |= MRDMODE_INTR_CH0; 77 } else { 78 pd->config[MRDMODE] &= ~MRDMODE_INTR_CH0; 79 } 80 81 if (pd->config[ARTTIM23] & ARTTIM23_INTR_CH1) { 82 pd->config[MRDMODE] |= MRDMODE_INTR_CH1; 83 } else { 84 pd->config[MRDMODE] &= ~MRDMODE_INTR_CH1; 85 } 86 } 87 88 static uint64_t bmdma_read(void *opaque, hwaddr addr, 89 unsigned size) 90 { 91 BMDMAState *bm = opaque; 92 PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev); 93 uint32_t val; 94 95 if (size != 1) { 96 return ((uint64_t)1 << (size * 8)) - 1; 97 } 98 99 switch(addr & 3) { 100 case 0: 101 val = bm->cmd; 102 break; 103 case 1: 104 val = pci_dev->config[MRDMODE]; 105 break; 106 case 2: 107 val = bm->status; 108 break; 109 case 3: 110 if (bm == &bm->pci_dev->bmdma[0]) { 111 val = pci_dev->config[UDIDETCR0]; 112 } else { 113 val = pci_dev->config[UDIDETCR1]; 114 } 115 break; 116 default: 117 val = 0xff; 118 break; 119 } 120 121 trace_bmdma_read_cmd646(addr, val); 122 return val; 123 } 124 125 static void bmdma_write(void *opaque, hwaddr addr, 126 uint64_t val, unsigned size) 127 { 128 BMDMAState *bm = opaque; 129 PCIDevice *pci_dev = PCI_DEVICE(bm->pci_dev); 130 131 if (size != 1) { 132 return; 133 } 134 135 trace_bmdma_write_cmd646(addr, val); 136 switch(addr & 3) { 137 case 0: 138 bmdma_cmd_writeb(bm, val); 139 break; 140 case 1: 141 pci_dev->config[MRDMODE] = 142 (pci_dev->config[MRDMODE] & ~0x30) | (val & 0x30); 143 cmd646_update_dma_interrupts(pci_dev); 144 cmd646_update_irq(pci_dev); 145 break; 146 case 2: 147 bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06); 148 break; 149 case 3: 150 if (bm == &bm->pci_dev->bmdma[0]) { 151 pci_dev->config[UDIDETCR0] = val; 152 } else { 153 pci_dev->config[UDIDETCR1] = val; 154 } 155 break; 156 } 157 } 158 159 static const MemoryRegionOps cmd646_bmdma_ops = { 160 .read = bmdma_read, 161 .write = bmdma_write, 162 }; 163 164 static void bmdma_setup_bar(PCIIDEState *d) 165 { 166 BMDMAState *bm; 167 int i; 168 169 memory_region_init(&d->bmdma_bar, OBJECT(d), "cmd646-bmdma", 16); 170 for(i = 0;i < 2; i++) { 171 bm = &d->bmdma[i]; 172 memory_region_init_io(&bm->extra_io, OBJECT(d), &cmd646_bmdma_ops, bm, 173 "cmd646-bmdma-bus", 4); 174 memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io); 175 memory_region_init_io(&bm->addr_ioport, OBJECT(d), 176 &bmdma_addr_ioport_ops, bm, 177 "cmd646-bmdma-ioport", 4); 178 memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport); 179 } 180 } 181 182 static void cmd646_update_irq(PCIDevice *pd) 183 { 184 int pci_level; 185 186 pci_level = ((pd->config[MRDMODE] & MRDMODE_INTR_CH0) && 187 !(pd->config[MRDMODE] & MRDMODE_BLK_CH0)) || 188 ((pd->config[MRDMODE] & MRDMODE_INTR_CH1) && 189 !(pd->config[MRDMODE] & MRDMODE_BLK_CH1)); 190 pci_set_irq(pd, pci_level); 191 } 192 193 /* the PCI irq level is the logical OR of the two channels */ 194 static void cmd646_set_irq(void *opaque, int channel, int level) 195 { 196 PCIIDEState *d = opaque; 197 PCIDevice *pd = PCI_DEVICE(d); 198 int irq_mask; 199 200 irq_mask = MRDMODE_INTR_CH0 << channel; 201 if (level) { 202 pd->config[MRDMODE] |= irq_mask; 203 } else { 204 pd->config[MRDMODE] &= ~irq_mask; 205 } 206 cmd646_update_dma_interrupts(pd); 207 cmd646_update_irq(pd); 208 } 209 210 static void cmd646_reset(void *opaque) 211 { 212 PCIIDEState *d = opaque; 213 unsigned int i; 214 215 for (i = 0; i < 2; i++) { 216 ide_bus_reset(&d->bus[i]); 217 } 218 } 219 220 static uint32_t cmd646_pci_config_read(PCIDevice *d, 221 uint32_t address, int len) 222 { 223 return pci_default_read_config(d, address, len); 224 } 225 226 static void cmd646_pci_config_write(PCIDevice *d, uint32_t addr, uint32_t val, 227 int l) 228 { 229 uint32_t i; 230 231 pci_default_write_config(d, addr, val, l); 232 233 for (i = addr; i < addr + l; i++) { 234 switch (i) { 235 case CFR: 236 case ARTTIM23: 237 cmd646_update_udma_interrupts(d); 238 break; 239 case MRDMODE: 240 cmd646_update_dma_interrupts(d); 241 break; 242 } 243 } 244 245 cmd646_update_irq(d); 246 } 247 248 /* CMD646 PCI IDE controller */ 249 static void pci_cmd646_ide_realize(PCIDevice *dev, Error **errp) 250 { 251 PCIIDEState *d = PCI_IDE(dev); 252 uint8_t *pci_conf = dev->config; 253 qemu_irq *irq; 254 int i; 255 256 pci_conf[PCI_CLASS_PROG] = 0x8f; 257 258 pci_conf[CNTRL] = CNTRL_EN_CH0; // enable IDE0 259 if (d->secondary) { 260 /* XXX: if not enabled, really disable the seconday IDE controller */ 261 pci_conf[CNTRL] |= CNTRL_EN_CH1; /* enable IDE1 */ 262 } 263 264 /* Set write-to-clear interrupt bits */ 265 dev->wmask[CFR] = 0x0; 266 dev->w1cmask[CFR] = CFR_INTR_CH0; 267 dev->wmask[ARTTIM23] = 0x0; 268 dev->w1cmask[ARTTIM23] = ARTTIM23_INTR_CH1; 269 dev->wmask[MRDMODE] = 0x0; 270 dev->w1cmask[MRDMODE] = MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1; 271 272 memory_region_init_io(&d->data_bar[0], OBJECT(d), &pci_ide_data_le_ops, 273 &d->bus[0], "cmd646-data0", 8); 274 pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->data_bar[0]); 275 276 memory_region_init_io(&d->cmd_bar[0], OBJECT(d), &pci_ide_cmd_le_ops, 277 &d->bus[0], "cmd646-cmd0", 4); 278 pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd_bar[0]); 279 280 memory_region_init_io(&d->data_bar[1], OBJECT(d), &pci_ide_data_le_ops, 281 &d->bus[1], "cmd646-data1", 8); 282 pci_register_bar(dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &d->data_bar[1]); 283 284 memory_region_init_io(&d->cmd_bar[1], OBJECT(d), &pci_ide_cmd_le_ops, 285 &d->bus[1], "cmd646-cmd1", 4); 286 pci_register_bar(dev, 3, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd_bar[1]); 287 288 bmdma_setup_bar(d); 289 pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar); 290 291 /* TODO: RST# value should be 0 */ 292 pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1 293 294 irq = qemu_allocate_irqs(cmd646_set_irq, d, 2); 295 for (i = 0; i < 2; i++) { 296 ide_bus_new(&d->bus[i], sizeof(d->bus[i]), DEVICE(dev), i, 2); 297 ide_init2(&d->bus[i], irq[i]); 298 299 bmdma_init(&d->bus[i], &d->bmdma[i], d); 300 d->bmdma[i].bus = &d->bus[i]; 301 ide_register_restart_cb(&d->bus[i]); 302 } 303 g_free(irq); 304 305 vmstate_register(DEVICE(dev), 0, &vmstate_ide_pci, d); 306 qemu_register_reset(cmd646_reset, d); 307 } 308 309 static void pci_cmd646_ide_exitfn(PCIDevice *dev) 310 { 311 PCIIDEState *d = PCI_IDE(dev); 312 unsigned i; 313 314 for (i = 0; i < 2; ++i) { 315 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io); 316 memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport); 317 } 318 } 319 320 void pci_cmd646_ide_init(PCIBus *bus, DriveInfo **hd_table, 321 int secondary_ide_enabled) 322 { 323 PCIDevice *dev; 324 325 dev = pci_create(bus, -1, "cmd646-ide"); 326 qdev_prop_set_uint32(&dev->qdev, "secondary", secondary_ide_enabled); 327 qdev_init_nofail(&dev->qdev); 328 329 pci_ide_create_devs(dev, hd_table); 330 } 331 332 static Property cmd646_ide_properties[] = { 333 DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0), 334 DEFINE_PROP_END_OF_LIST(), 335 }; 336 337 static void cmd646_ide_class_init(ObjectClass *klass, void *data) 338 { 339 DeviceClass *dc = DEVICE_CLASS(klass); 340 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 341 342 k->realize = pci_cmd646_ide_realize; 343 k->exit = pci_cmd646_ide_exitfn; 344 k->vendor_id = PCI_VENDOR_ID_CMD; 345 k->device_id = PCI_DEVICE_ID_CMD_646; 346 k->revision = 0x07; 347 k->class_id = PCI_CLASS_STORAGE_IDE; 348 k->config_read = cmd646_pci_config_read; 349 k->config_write = cmd646_pci_config_write; 350 dc->props = cmd646_ide_properties; 351 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 352 } 353 354 static const TypeInfo cmd646_ide_info = { 355 .name = "cmd646-ide", 356 .parent = TYPE_PCI_IDE, 357 .class_init = cmd646_ide_class_init, 358 }; 359 360 static void cmd646_ide_register_types(void) 361 { 362 type_register_static(&cmd646_ide_info); 363 } 364 365 type_init(cmd646_ide_register_types) 366