Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | sata_via.c - VIA Serial ATA controllers |
| 3 | |
| 4 | Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | on emails. |
| 7 | |
| 8 | Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| 9 | Copyright 2003-2004 Jeff Garzik |
| 10 | |
| 11 | The contents of this file are subject to the Open |
| 12 | Software License version 1.1 that can be found at |
| 13 | http://www.opensource.org/licenses/osl-1.1.txt and is included herein |
| 14 | by reference. |
| 15 | |
| 16 | Alternatively, the contents of this file may be used under the terms |
| 17 | of the GNU General Public License version 2 (the "GPL") as distributed |
| 18 | in the kernel source COPYING file, in which case the provisions of |
| 19 | the GPL are applicable instead of the above. If you wish to allow |
| 20 | the use of your version of this file only under the terms of the |
| 21 | GPL and not to allow others to use your version of this file under |
| 22 | the OSL, indicate your decision by deleting the provisions above and |
| 23 | replace them with the notice and other provisions required by the GPL. |
| 24 | If you do not delete the provisions above, a recipient may use your |
| 25 | version of this file under either the OSL or the GPL. |
| 26 | |
| 27 | ---------------------------------------------------------------------- |
| 28 | |
| 29 | To-do list: |
| 30 | * VT6421 PATA support |
| 31 | |
| 32 | */ |
| 33 | |
| 34 | #include <linux/kernel.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/pci.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/blkdev.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include "scsi.h" |
| 41 | #include <scsi/scsi_host.h> |
| 42 | #include <linux/libata.h> |
| 43 | #include <asm/io.h> |
| 44 | |
| 45 | #define DRV_NAME "sata_via" |
| 46 | #define DRV_VERSION "1.1" |
| 47 | |
| 48 | enum board_ids_enum { |
| 49 | vt6420, |
| 50 | vt6421, |
| 51 | }; |
| 52 | |
| 53 | enum { |
| 54 | SATA_CHAN_ENAB = 0x40, /* SATA channel enable */ |
| 55 | SATA_INT_GATE = 0x41, /* SATA interrupt gating */ |
| 56 | SATA_NATIVE_MODE = 0x42, /* Native mode enable */ |
| 57 | SATA_PATA_SHARING = 0x49, /* PATA/SATA sharing func ctrl */ |
| 58 | |
| 59 | PORT0 = (1 << 1), |
| 60 | PORT1 = (1 << 0), |
| 61 | ALL_PORTS = PORT0 | PORT1, |
| 62 | N_PORTS = 2, |
| 63 | |
| 64 | NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4), |
| 65 | |
| 66 | SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */ |
| 67 | SATA_2DEV = (1 << 5), /* SATA is master/slave */ |
| 68 | }; |
| 69 | |
| 70 | static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); |
| 71 | static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg); |
| 72 | static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); |
| 73 | |
| 74 | static struct pci_device_id svia_pci_tbl[] = { |
| 75 | { 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 }, |
| 76 | { 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 }, |
| 77 | |
| 78 | { } /* terminate list */ |
| 79 | }; |
| 80 | |
| 81 | static struct pci_driver svia_pci_driver = { |
| 82 | .name = DRV_NAME, |
| 83 | .id_table = svia_pci_tbl, |
| 84 | .probe = svia_init_one, |
| 85 | .remove = ata_pci_remove_one, |
| 86 | }; |
| 87 | |
| 88 | static Scsi_Host_Template svia_sht = { |
| 89 | .module = THIS_MODULE, |
| 90 | .name = DRV_NAME, |
| 91 | .ioctl = ata_scsi_ioctl, |
| 92 | .queuecommand = ata_scsi_queuecmd, |
| 93 | .eh_strategy_handler = ata_scsi_error, |
| 94 | .can_queue = ATA_DEF_QUEUE, |
| 95 | .this_id = ATA_SHT_THIS_ID, |
| 96 | .sg_tablesize = LIBATA_MAX_PRD, |
| 97 | .max_sectors = ATA_MAX_SECTORS, |
| 98 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
| 99 | .emulated = ATA_SHT_EMULATED, |
| 100 | .use_clustering = ATA_SHT_USE_CLUSTERING, |
| 101 | .proc_name = DRV_NAME, |
| 102 | .dma_boundary = ATA_DMA_BOUNDARY, |
| 103 | .slave_configure = ata_scsi_slave_config, |
| 104 | .bios_param = ata_std_bios_param, |
| 105 | .ordered_flush = 1, |
| 106 | }; |
| 107 | |
| 108 | static struct ata_port_operations svia_sata_ops = { |
| 109 | .port_disable = ata_port_disable, |
| 110 | |
| 111 | .tf_load = ata_tf_load, |
| 112 | .tf_read = ata_tf_read, |
| 113 | .check_status = ata_check_status, |
| 114 | .exec_command = ata_exec_command, |
| 115 | .dev_select = ata_std_dev_select, |
| 116 | |
| 117 | .phy_reset = sata_phy_reset, |
| 118 | |
| 119 | .bmdma_setup = ata_bmdma_setup, |
| 120 | .bmdma_start = ata_bmdma_start, |
| 121 | .bmdma_stop = ata_bmdma_stop, |
| 122 | .bmdma_status = ata_bmdma_status, |
| 123 | |
| 124 | .qc_prep = ata_qc_prep, |
| 125 | .qc_issue = ata_qc_issue_prot, |
| 126 | |
| 127 | .eng_timeout = ata_eng_timeout, |
| 128 | |
| 129 | .irq_handler = ata_interrupt, |
| 130 | .irq_clear = ata_bmdma_irq_clear, |
| 131 | |
| 132 | .scr_read = svia_scr_read, |
| 133 | .scr_write = svia_scr_write, |
| 134 | |
| 135 | .port_start = ata_port_start, |
| 136 | .port_stop = ata_port_stop, |
| 137 | }; |
| 138 | |
| 139 | static struct ata_port_info svia_port_info = { |
| 140 | .sht = &svia_sht, |
| 141 | .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | ATA_FLAG_NO_LEGACY, |
| 142 | .pio_mask = 0x1f, |
| 143 | .mwdma_mask = 0x07, |
| 144 | .udma_mask = 0x7f, |
| 145 | .port_ops = &svia_sata_ops, |
| 146 | }; |
| 147 | |
| 148 | MODULE_AUTHOR("Jeff Garzik"); |
| 149 | MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers"); |
| 150 | MODULE_LICENSE("GPL"); |
| 151 | MODULE_DEVICE_TABLE(pci, svia_pci_tbl); |
| 152 | MODULE_VERSION(DRV_VERSION); |
| 153 | |
| 154 | static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg) |
| 155 | { |
| 156 | if (sc_reg > SCR_CONTROL) |
| 157 | return 0xffffffffU; |
| 158 | return inl(ap->ioaddr.scr_addr + (4 * sc_reg)); |
| 159 | } |
| 160 | |
| 161 | static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) |
| 162 | { |
| 163 | if (sc_reg > SCR_CONTROL) |
| 164 | return; |
| 165 | outl(val, ap->ioaddr.scr_addr + (4 * sc_reg)); |
| 166 | } |
| 167 | |
| 168 | static const unsigned int svia_bar_sizes[] = { |
| 169 | 8, 4, 8, 4, 16, 256 |
| 170 | }; |
| 171 | |
| 172 | static const unsigned int vt6421_bar_sizes[] = { |
| 173 | 16, 16, 16, 16, 32, 128 |
| 174 | }; |
| 175 | |
| 176 | static unsigned long svia_scr_addr(unsigned long addr, unsigned int port) |
| 177 | { |
| 178 | return addr + (port * 128); |
| 179 | } |
| 180 | |
| 181 | static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port) |
| 182 | { |
| 183 | return addr + (port * 64); |
| 184 | } |
| 185 | |
| 186 | static void vt6421_init_addrs(struct ata_probe_ent *probe_ent, |
| 187 | struct pci_dev *pdev, |
| 188 | unsigned int port) |
| 189 | { |
| 190 | unsigned long reg_addr = pci_resource_start(pdev, port); |
| 191 | unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8); |
| 192 | unsigned long scr_addr; |
| 193 | |
| 194 | probe_ent->port[port].cmd_addr = reg_addr; |
| 195 | probe_ent->port[port].altstatus_addr = |
| 196 | probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS; |
| 197 | probe_ent->port[port].bmdma_addr = bmdma_addr; |
| 198 | |
| 199 | scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port); |
| 200 | probe_ent->port[port].scr_addr = scr_addr; |
| 201 | |
| 202 | ata_std_ports(&probe_ent->port[port]); |
| 203 | } |
| 204 | |
| 205 | static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev) |
| 206 | { |
| 207 | struct ata_probe_ent *probe_ent; |
| 208 | struct ata_port_info *ppi = &svia_port_info; |
| 209 | |
| 210 | probe_ent = ata_pci_init_native_mode(pdev, &ppi); |
| 211 | if (!probe_ent) |
| 212 | return NULL; |
| 213 | |
| 214 | probe_ent->port[0].scr_addr = |
| 215 | svia_scr_addr(pci_resource_start(pdev, 5), 0); |
| 216 | probe_ent->port[1].scr_addr = |
| 217 | svia_scr_addr(pci_resource_start(pdev, 5), 1); |
| 218 | |
| 219 | return probe_ent; |
| 220 | } |
| 221 | |
| 222 | static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev) |
| 223 | { |
| 224 | struct ata_probe_ent *probe_ent; |
| 225 | unsigned int i; |
| 226 | |
| 227 | probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); |
| 228 | if (!probe_ent) |
| 229 | return NULL; |
| 230 | |
| 231 | memset(probe_ent, 0, sizeof(*probe_ent)); |
| 232 | probe_ent->dev = pci_dev_to_dev(pdev); |
| 233 | INIT_LIST_HEAD(&probe_ent->node); |
| 234 | |
| 235 | probe_ent->sht = &svia_sht; |
| 236 | probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET | |
| 237 | ATA_FLAG_NO_LEGACY; |
| 238 | probe_ent->port_ops = &svia_sata_ops; |
| 239 | probe_ent->n_ports = N_PORTS; |
| 240 | probe_ent->irq = pdev->irq; |
| 241 | probe_ent->irq_flags = SA_SHIRQ; |
| 242 | probe_ent->pio_mask = 0x1f; |
| 243 | probe_ent->mwdma_mask = 0x07; |
| 244 | probe_ent->udma_mask = 0x7f; |
| 245 | |
| 246 | for (i = 0; i < N_PORTS; i++) |
| 247 | vt6421_init_addrs(probe_ent, pdev, i); |
| 248 | |
| 249 | return probe_ent; |
| 250 | } |
| 251 | |
| 252 | static void svia_configure(struct pci_dev *pdev) |
| 253 | { |
| 254 | u8 tmp8; |
| 255 | |
| 256 | pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8); |
| 257 | printk(KERN_INFO DRV_NAME "(%s): routed to hard irq line %d\n", |
| 258 | pci_name(pdev), |
| 259 | (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f); |
| 260 | |
| 261 | /* make sure SATA channels are enabled */ |
| 262 | pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8); |
| 263 | if ((tmp8 & ALL_PORTS) != ALL_PORTS) { |
| 264 | printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channels (0x%x)\n", |
| 265 | pci_name(pdev), (int) tmp8); |
| 266 | tmp8 |= ALL_PORTS; |
| 267 | pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8); |
| 268 | } |
| 269 | |
| 270 | /* make sure interrupts for each channel sent to us */ |
| 271 | pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8); |
| 272 | if ((tmp8 & ALL_PORTS) != ALL_PORTS) { |
| 273 | printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel interrupts (0x%x)\n", |
| 274 | pci_name(pdev), (int) tmp8); |
| 275 | tmp8 |= ALL_PORTS; |
| 276 | pci_write_config_byte(pdev, SATA_INT_GATE, tmp8); |
| 277 | } |
| 278 | |
| 279 | /* make sure native mode is enabled */ |
| 280 | pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8); |
| 281 | if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) { |
| 282 | printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel native mode (0x%x)\n", |
| 283 | pci_name(pdev), (int) tmp8); |
| 284 | tmp8 |= NATIVE_MODE_ALL; |
| 285 | pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) |
| 290 | { |
| 291 | static int printed_version; |
| 292 | unsigned int i; |
| 293 | int rc; |
| 294 | struct ata_probe_ent *probe_ent; |
| 295 | int board_id = (int) ent->driver_data; |
| 296 | const int *bar_sizes; |
| 297 | int pci_dev_busy = 0; |
| 298 | u8 tmp8; |
| 299 | |
| 300 | if (!printed_version++) |
| 301 | printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); |
| 302 | |
| 303 | rc = pci_enable_device(pdev); |
| 304 | if (rc) |
| 305 | return rc; |
| 306 | |
| 307 | rc = pci_request_regions(pdev, DRV_NAME); |
| 308 | if (rc) { |
| 309 | pci_dev_busy = 1; |
| 310 | goto err_out; |
| 311 | } |
| 312 | |
| 313 | if (board_id == vt6420) { |
| 314 | pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8); |
| 315 | if (tmp8 & SATA_2DEV) { |
| 316 | printk(KERN_ERR DRV_NAME "(%s): SATA master/slave not supported (0x%x)\n", |
| 317 | pci_name(pdev), (int) tmp8); |
| 318 | rc = -EIO; |
| 319 | goto err_out_regions; |
| 320 | } |
| 321 | |
| 322 | bar_sizes = &svia_bar_sizes[0]; |
| 323 | } else { |
| 324 | bar_sizes = &vt6421_bar_sizes[0]; |
| 325 | } |
| 326 | |
| 327 | for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++) |
| 328 | if ((pci_resource_start(pdev, i) == 0) || |
| 329 | (pci_resource_len(pdev, i) < bar_sizes[i])) { |
| 330 | printk(KERN_ERR DRV_NAME "(%s): invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n", |
| 331 | pci_name(pdev), i, |
| 332 | pci_resource_start(pdev, i), |
| 333 | pci_resource_len(pdev, i)); |
| 334 | rc = -ENODEV; |
| 335 | goto err_out_regions; |
| 336 | } |
| 337 | |
| 338 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); |
| 339 | if (rc) |
| 340 | goto err_out_regions; |
| 341 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); |
| 342 | if (rc) |
| 343 | goto err_out_regions; |
| 344 | |
| 345 | if (board_id == vt6420) |
| 346 | probe_ent = vt6420_init_probe_ent(pdev); |
| 347 | else |
| 348 | probe_ent = vt6421_init_probe_ent(pdev); |
| 349 | |
| 350 | if (!probe_ent) { |
| 351 | printk(KERN_ERR DRV_NAME "(%s): out of memory\n", |
| 352 | pci_name(pdev)); |
| 353 | rc = -ENOMEM; |
| 354 | goto err_out_regions; |
| 355 | } |
| 356 | |
| 357 | svia_configure(pdev); |
| 358 | |
| 359 | pci_set_master(pdev); |
| 360 | |
| 361 | /* FIXME: check ata_device_add return value */ |
| 362 | ata_device_add(probe_ent); |
| 363 | kfree(probe_ent); |
| 364 | |
| 365 | return 0; |
| 366 | |
| 367 | err_out_regions: |
| 368 | pci_release_regions(pdev); |
| 369 | err_out: |
| 370 | if (!pci_dev_busy) |
| 371 | pci_disable_device(pdev); |
| 372 | return rc; |
| 373 | } |
| 374 | |
| 375 | static int __init svia_init(void) |
| 376 | { |
| 377 | return pci_module_init(&svia_pci_driver); |
| 378 | } |
| 379 | |
| 380 | static void __exit svia_exit(void) |
| 381 | { |
| 382 | pci_unregister_driver(&svia_pci_driver); |
| 383 | } |
| 384 | |
| 385 | module_init(svia_init); |
| 386 | module_exit(svia_exit); |
| 387 | |