| 1 | /* |
| 2 | * tifm_7xx1.c - TI FlashMedia driver |
| 3 | * |
| 4 | * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/tifm.h> |
| 13 | #include <linux/dma-mapping.h> |
| 14 | |
| 15 | #define DRIVER_NAME "tifm_7xx1" |
| 16 | #define DRIVER_VERSION "0.8" |
| 17 | |
| 18 | #define TIFM_IRQ_ENABLE 0x80000000 |
| 19 | #define TIFM_IRQ_SOCKMASK(x) (x) |
| 20 | #define TIFM_IRQ_CARDMASK(x) ((x) << 8) |
| 21 | #define TIFM_IRQ_FIFOMASK(x) ((x) << 16) |
| 22 | #define TIFM_IRQ_SETALL 0xffffffff |
| 23 | |
| 24 | static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm, |
| 25 | struct tifm_dev *sock) |
| 26 | { |
| 27 | } |
| 28 | |
| 29 | static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock) |
| 30 | { |
| 31 | unsigned long flags; |
| 32 | |
| 33 | spin_lock_irqsave(&fm->lock, flags); |
| 34 | fm->socket_change_set |= 1 << sock->socket_id; |
| 35 | tifm_queue_work(&fm->media_switcher); |
| 36 | spin_unlock_irqrestore(&fm->lock, flags); |
| 37 | } |
| 38 | |
| 39 | static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id) |
| 40 | { |
| 41 | struct tifm_adapter *fm = dev_id; |
| 42 | struct tifm_dev *sock; |
| 43 | unsigned int irq_status, cnt; |
| 44 | |
| 45 | spin_lock(&fm->lock); |
| 46 | irq_status = readl(fm->addr + FM_INTERRUPT_STATUS); |
| 47 | if (irq_status == 0 || irq_status == (~0)) { |
| 48 | spin_unlock(&fm->lock); |
| 49 | return IRQ_NONE; |
| 50 | } |
| 51 | |
| 52 | if (irq_status & TIFM_IRQ_ENABLE) { |
| 53 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 54 | |
| 55 | for (cnt = 0; cnt < fm->num_sockets; cnt++) { |
| 56 | sock = fm->sockets[cnt]; |
| 57 | if (sock) { |
| 58 | if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1)) |
| 59 | sock->data_event(sock); |
| 60 | if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1)) |
| 61 | sock->card_event(sock); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | fm->socket_change_set |= irq_status |
| 66 | & ((1 << fm->num_sockets) - 1); |
| 67 | } |
| 68 | writel(irq_status, fm->addr + FM_INTERRUPT_STATUS); |
| 69 | |
| 70 | if (fm->finish_me) |
| 71 | complete_all(fm->finish_me); |
| 72 | else if (!fm->socket_change_set) |
| 73 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 74 | else |
| 75 | tifm_queue_work(&fm->media_switcher); |
| 76 | |
| 77 | spin_unlock(&fm->lock); |
| 78 | return IRQ_HANDLED; |
| 79 | } |
| 80 | |
| 81 | static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr) |
| 82 | { |
| 83 | unsigned int s_state; |
| 84 | int cnt; |
| 85 | |
| 86 | writel(0x0e00, sock_addr + SOCK_CONTROL); |
| 87 | |
| 88 | for (cnt = 16; cnt <= 256; cnt <<= 1) { |
| 89 | if (!(TIFM_SOCK_STATE_POWERED |
| 90 | & readl(sock_addr + SOCK_PRESENT_STATE))) |
| 91 | break; |
| 92 | |
| 93 | msleep(cnt); |
| 94 | } |
| 95 | |
| 96 | s_state = readl(sock_addr + SOCK_PRESENT_STATE); |
| 97 | if (!(TIFM_SOCK_STATE_OCCUPIED & s_state)) |
| 98 | return 0; |
| 99 | |
| 100 | writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED, |
| 101 | sock_addr + SOCK_CONTROL); |
| 102 | |
| 103 | /* xd needs some extra time before power on */ |
| 104 | if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) |
| 105 | == TIFM_TYPE_XD) |
| 106 | msleep(40); |
| 107 | |
| 108 | writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00, |
| 109 | sock_addr + SOCK_CONTROL); |
| 110 | /* wait for power to stabilize */ |
| 111 | msleep(20); |
| 112 | for (cnt = 16; cnt <= 256; cnt <<= 1) { |
| 113 | if ((TIFM_SOCK_STATE_POWERED |
| 114 | & readl(sock_addr + SOCK_PRESENT_STATE))) |
| 115 | break; |
| 116 | |
| 117 | msleep(cnt); |
| 118 | } |
| 119 | |
| 120 | writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED), |
| 121 | sock_addr + SOCK_CONTROL); |
| 122 | |
| 123 | return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7; |
| 124 | } |
| 125 | |
| 126 | inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr) |
| 127 | { |
| 128 | writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL), |
| 129 | sock_addr + SOCK_CONTROL); |
| 130 | } |
| 131 | |
| 132 | inline static char __iomem * |
| 133 | tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num) |
| 134 | { |
| 135 | return base_addr + ((sock_num + 1) << 10); |
| 136 | } |
| 137 | |
| 138 | static void tifm_7xx1_switch_media(struct work_struct *work) |
| 139 | { |
| 140 | struct tifm_adapter *fm = container_of(work, struct tifm_adapter, |
| 141 | media_switcher); |
| 142 | struct tifm_dev *sock; |
| 143 | char __iomem *sock_addr; |
| 144 | unsigned long flags; |
| 145 | unsigned char media_id; |
| 146 | unsigned int socket_change_set, cnt; |
| 147 | |
| 148 | spin_lock_irqsave(&fm->lock, flags); |
| 149 | socket_change_set = fm->socket_change_set; |
| 150 | fm->socket_change_set = 0; |
| 151 | |
| 152 | dev_dbg(fm->dev.parent, "checking media set %x\n", |
| 153 | socket_change_set); |
| 154 | |
| 155 | if (!socket_change_set) { |
| 156 | spin_unlock_irqrestore(&fm->lock, flags); |
| 157 | return; |
| 158 | } |
| 159 | |
| 160 | for (cnt = 0; cnt < fm->num_sockets; cnt++) { |
| 161 | if (!(socket_change_set & (1 << cnt))) |
| 162 | continue; |
| 163 | sock = fm->sockets[cnt]; |
| 164 | if (sock) { |
| 165 | printk(KERN_INFO |
| 166 | "%s : demand removing card from socket %u:%u\n", |
| 167 | dev_name(&fm->dev), fm->id, cnt); |
| 168 | fm->sockets[cnt] = NULL; |
| 169 | sock_addr = sock->addr; |
| 170 | spin_unlock_irqrestore(&fm->lock, flags); |
| 171 | device_unregister(&sock->dev); |
| 172 | spin_lock_irqsave(&fm->lock, flags); |
| 173 | tifm_7xx1_sock_power_off(sock_addr); |
| 174 | writel(0x0e00, sock_addr + SOCK_CONTROL); |
| 175 | } |
| 176 | |
| 177 | spin_unlock_irqrestore(&fm->lock, flags); |
| 178 | |
| 179 | media_id = tifm_7xx1_toggle_sock_power( |
| 180 | tifm_7xx1_sock_addr(fm->addr, cnt)); |
| 181 | |
| 182 | // tifm_alloc_device will check if media_id is valid |
| 183 | sock = tifm_alloc_device(fm, cnt, media_id); |
| 184 | if (sock) { |
| 185 | sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt); |
| 186 | |
| 187 | if (!device_register(&sock->dev)) { |
| 188 | spin_lock_irqsave(&fm->lock, flags); |
| 189 | if (!fm->sockets[cnt]) { |
| 190 | fm->sockets[cnt] = sock; |
| 191 | sock = NULL; |
| 192 | } |
| 193 | spin_unlock_irqrestore(&fm->lock, flags); |
| 194 | } |
| 195 | if (sock) |
| 196 | tifm_free_device(&sock->dev); |
| 197 | } |
| 198 | spin_lock_irqsave(&fm->lock, flags); |
| 199 | } |
| 200 | |
| 201 | writel(TIFM_IRQ_FIFOMASK(socket_change_set) |
| 202 | | TIFM_IRQ_CARDMASK(socket_change_set), |
| 203 | fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 204 | |
| 205 | writel(TIFM_IRQ_FIFOMASK(socket_change_set) |
| 206 | | TIFM_IRQ_CARDMASK(socket_change_set), |
| 207 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 208 | |
| 209 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 210 | spin_unlock_irqrestore(&fm->lock, flags); |
| 211 | } |
| 212 | |
| 213 | #ifdef CONFIG_PM |
| 214 | |
| 215 | static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state) |
| 216 | { |
| 217 | struct tifm_adapter *fm = pci_get_drvdata(dev); |
| 218 | int cnt; |
| 219 | |
| 220 | dev_dbg(&dev->dev, "suspending host\n"); |
| 221 | |
| 222 | for (cnt = 0; cnt < fm->num_sockets; cnt++) { |
| 223 | if (fm->sockets[cnt]) |
| 224 | tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr); |
| 225 | } |
| 226 | |
| 227 | pci_save_state(dev); |
| 228 | pci_enable_wake(dev, pci_choose_state(dev, state), 0); |
| 229 | pci_disable_device(dev); |
| 230 | pci_set_power_state(dev, pci_choose_state(dev, state)); |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static int tifm_7xx1_resume(struct pci_dev *dev) |
| 235 | { |
| 236 | struct tifm_adapter *fm = pci_get_drvdata(dev); |
| 237 | int rc; |
| 238 | unsigned int good_sockets = 0, bad_sockets = 0; |
| 239 | unsigned long flags; |
| 240 | unsigned char new_ids[fm->num_sockets]; |
| 241 | DECLARE_COMPLETION_ONSTACK(finish_resume); |
| 242 | |
| 243 | pci_set_power_state(dev, PCI_D0); |
| 244 | pci_restore_state(dev); |
| 245 | rc = pci_enable_device(dev); |
| 246 | if (rc) |
| 247 | return rc; |
| 248 | pci_set_master(dev); |
| 249 | |
| 250 | dev_dbg(&dev->dev, "resuming host\n"); |
| 251 | |
| 252 | for (rc = 0; rc < fm->num_sockets; rc++) |
| 253 | new_ids[rc] = tifm_7xx1_toggle_sock_power( |
| 254 | tifm_7xx1_sock_addr(fm->addr, rc)); |
| 255 | spin_lock_irqsave(&fm->lock, flags); |
| 256 | for (rc = 0; rc < fm->num_sockets; rc++) { |
| 257 | if (fm->sockets[rc]) { |
| 258 | if (fm->sockets[rc]->type == new_ids[rc]) |
| 259 | good_sockets |= 1 << rc; |
| 260 | else |
| 261 | bad_sockets |= 1 << rc; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1), |
| 266 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 267 | dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n", |
| 268 | good_sockets, bad_sockets); |
| 269 | |
| 270 | fm->socket_change_set = 0; |
| 271 | if (good_sockets) { |
| 272 | fm->finish_me = &finish_resume; |
| 273 | spin_unlock_irqrestore(&fm->lock, flags); |
| 274 | rc = wait_for_completion_timeout(&finish_resume, HZ); |
| 275 | dev_dbg(&dev->dev, "wait returned %d\n", rc); |
| 276 | writel(TIFM_IRQ_FIFOMASK(good_sockets) |
| 277 | | TIFM_IRQ_CARDMASK(good_sockets), |
| 278 | fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 279 | writel(TIFM_IRQ_FIFOMASK(good_sockets) |
| 280 | | TIFM_IRQ_CARDMASK(good_sockets), |
| 281 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 282 | spin_lock_irqsave(&fm->lock, flags); |
| 283 | fm->finish_me = NULL; |
| 284 | fm->socket_change_set ^= good_sockets & fm->socket_change_set; |
| 285 | } |
| 286 | |
| 287 | fm->socket_change_set |= bad_sockets; |
| 288 | if (fm->socket_change_set) |
| 289 | tifm_queue_work(&fm->media_switcher); |
| 290 | |
| 291 | spin_unlock_irqrestore(&fm->lock, flags); |
| 292 | writel(TIFM_IRQ_ENABLE, |
| 293 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 294 | |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | #else |
| 299 | |
| 300 | #define tifm_7xx1_suspend NULL |
| 301 | #define tifm_7xx1_resume NULL |
| 302 | |
| 303 | #endif /* CONFIG_PM */ |
| 304 | |
| 305 | static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm, |
| 306 | struct tifm_dev *sock) |
| 307 | { |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock) |
| 312 | { |
| 313 | if (((fm->num_sockets == 4) && (sock->socket_id == 2)) |
| 314 | || ((fm->num_sockets == 2) && (sock->socket_id == 0))) |
| 315 | return 1; |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int tifm_7xx1_probe(struct pci_dev *dev, |
| 321 | const struct pci_device_id *dev_id) |
| 322 | { |
| 323 | struct tifm_adapter *fm; |
| 324 | int pci_dev_busy = 0; |
| 325 | int rc; |
| 326 | |
| 327 | rc = pci_set_dma_mask(dev, DMA_BIT_MASK(32)); |
| 328 | if (rc) |
| 329 | return rc; |
| 330 | |
| 331 | rc = pci_enable_device(dev); |
| 332 | if (rc) |
| 333 | return rc; |
| 334 | |
| 335 | pci_set_master(dev); |
| 336 | |
| 337 | rc = pci_request_regions(dev, DRIVER_NAME); |
| 338 | if (rc) { |
| 339 | pci_dev_busy = 1; |
| 340 | goto err_out; |
| 341 | } |
| 342 | |
| 343 | pci_intx(dev, 1); |
| 344 | |
| 345 | fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM |
| 346 | ? 4 : 2, &dev->dev); |
| 347 | if (!fm) { |
| 348 | rc = -ENOMEM; |
| 349 | goto err_out_int; |
| 350 | } |
| 351 | |
| 352 | INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media); |
| 353 | fm->eject = tifm_7xx1_eject; |
| 354 | fm->has_ms_pif = tifm_7xx1_has_ms_pif; |
| 355 | pci_set_drvdata(dev, fm); |
| 356 | |
| 357 | fm->addr = pci_ioremap_bar(dev, 0); |
| 358 | if (!fm->addr) |
| 359 | goto err_out_free; |
| 360 | |
| 361 | rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm); |
| 362 | if (rc) |
| 363 | goto err_out_unmap; |
| 364 | |
| 365 | rc = tifm_add_adapter(fm); |
| 366 | if (rc) |
| 367 | goto err_out_irq; |
| 368 | |
| 369 | writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1), |
| 370 | fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 371 | writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1), |
| 372 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 373 | return 0; |
| 374 | |
| 375 | err_out_irq: |
| 376 | free_irq(dev->irq, fm); |
| 377 | err_out_unmap: |
| 378 | iounmap(fm->addr); |
| 379 | err_out_free: |
| 380 | pci_set_drvdata(dev, NULL); |
| 381 | tifm_free_adapter(fm); |
| 382 | err_out_int: |
| 383 | pci_intx(dev, 0); |
| 384 | pci_release_regions(dev); |
| 385 | err_out: |
| 386 | if (!pci_dev_busy) |
| 387 | pci_disable_device(dev); |
| 388 | return rc; |
| 389 | } |
| 390 | |
| 391 | static void tifm_7xx1_remove(struct pci_dev *dev) |
| 392 | { |
| 393 | struct tifm_adapter *fm = pci_get_drvdata(dev); |
| 394 | int cnt; |
| 395 | |
| 396 | fm->eject = tifm_7xx1_dummy_eject; |
| 397 | fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif; |
| 398 | writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 399 | mmiowb(); |
| 400 | free_irq(dev->irq, fm); |
| 401 | |
| 402 | tifm_remove_adapter(fm); |
| 403 | |
| 404 | for (cnt = 0; cnt < fm->num_sockets; cnt++) |
| 405 | tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt)); |
| 406 | |
| 407 | pci_set_drvdata(dev, NULL); |
| 408 | |
| 409 | iounmap(fm->addr); |
| 410 | pci_intx(dev, 0); |
| 411 | pci_release_regions(dev); |
| 412 | |
| 413 | pci_disable_device(dev); |
| 414 | tifm_free_adapter(fm); |
| 415 | } |
| 416 | |
| 417 | static struct pci_device_id tifm_7xx1_pci_tbl [] = { |
| 418 | { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID, |
| 419 | PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */ |
| 420 | { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID, |
| 421 | PCI_ANY_ID, 0, 0, 0 }, |
| 422 | { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID, |
| 423 | PCI_ANY_ID, 0, 0, 0 }, |
| 424 | { } |
| 425 | }; |
| 426 | |
| 427 | static struct pci_driver tifm_7xx1_driver = { |
| 428 | .name = DRIVER_NAME, |
| 429 | .id_table = tifm_7xx1_pci_tbl, |
| 430 | .probe = tifm_7xx1_probe, |
| 431 | .remove = tifm_7xx1_remove, |
| 432 | .suspend = tifm_7xx1_suspend, |
| 433 | .resume = tifm_7xx1_resume, |
| 434 | }; |
| 435 | |
| 436 | static int __init tifm_7xx1_init(void) |
| 437 | { |
| 438 | return pci_register_driver(&tifm_7xx1_driver); |
| 439 | } |
| 440 | |
| 441 | static void __exit tifm_7xx1_exit(void) |
| 442 | { |
| 443 | pci_unregister_driver(&tifm_7xx1_driver); |
| 444 | } |
| 445 | |
| 446 | MODULE_AUTHOR("Alex Dubov"); |
| 447 | MODULE_DESCRIPTION("TI FlashMedia host driver"); |
| 448 | MODULE_LICENSE("GPL"); |
| 449 | MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl); |
| 450 | MODULE_VERSION(DRIVER_VERSION); |
| 451 | |
| 452 | module_init(tifm_7xx1_init); |
| 453 | module_exit(tifm_7xx1_exit); |