1 /* 2 * Copyright (C) 2007 PA Semi, Inc 3 * 4 * Maintained by: Olof Johansson <olof@lixom.net> 5 * 6 * Based on drivers/pcmcia/omap_cf.c 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 #include <linux/module.h> 24 #include <linux/kernel.h> 25 #include <linux/sched.h> 26 #include <linux/platform_device.h> 27 #include <linux/errno.h> 28 #include <linux/init.h> 29 #include <linux/delay.h> 30 #include <linux/interrupt.h> 31 #include <linux/vmalloc.h> 32 33 #include <pcmcia/ss.h> 34 #include <asm/of_platform.h> 35 36 static const char driver_name[] = "electra-cf"; 37 38 struct electra_cf_socket { 39 struct pcmcia_socket socket; 40 41 struct timer_list timer; 42 unsigned present:1; 43 unsigned active:1; 44 45 struct of_device *ofdev; 46 unsigned long mem_phys; 47 void __iomem * mem_base; 48 unsigned long mem_size; 49 void __iomem * io_virt; 50 unsigned int io_base; 51 unsigned int io_size; 52 u_int irq; 53 struct resource iomem; 54 void __iomem * gpio_base; 55 int gpio_detect; 56 int gpio_vsense; 57 int gpio_3v; 58 int gpio_5v; 59 }; 60 61 #define POLL_INTERVAL (2 * HZ) 62 63 64 static int electra_cf_present(struct electra_cf_socket *cf) 65 { 66 unsigned int gpio; 67 68 gpio = in_le32(cf->gpio_base+0x40); 69 return !(gpio & (1 << cf->gpio_detect)); 70 } 71 72 static int electra_cf_ss_init(struct pcmcia_socket *s) 73 { 74 return 0; 75 } 76 77 /* the timer is primarily to kick this socket's pccardd */ 78 static void electra_cf_timer(unsigned long _cf) 79 { 80 struct electra_cf_socket *cf = (void *) _cf; 81 int present = electra_cf_present(cf); 82 83 if (present != cf->present) { 84 cf->present = present; 85 pcmcia_parse_events(&cf->socket, SS_DETECT); 86 } 87 88 if (cf->active) 89 mod_timer(&cf->timer, jiffies + POLL_INTERVAL); 90 } 91 92 static irqreturn_t electra_cf_irq(int irq, void *_cf) 93 { 94 electra_cf_timer((unsigned long)_cf); 95 return IRQ_HANDLED; 96 } 97 98 static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp) 99 { 100 struct electra_cf_socket *cf; 101 102 if (!sp) 103 return -EINVAL; 104 105 cf = container_of(s, struct electra_cf_socket, socket); 106 107 /* NOTE CF is always 3VCARD */ 108 if (electra_cf_present(cf)) { 109 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD; 110 111 s->pci_irq = cf->irq; 112 } else 113 *sp = 0; 114 return 0; 115 } 116 117 static int electra_cf_set_socket(struct pcmcia_socket *sock, 118 struct socket_state_t *s) 119 { 120 unsigned int gpio; 121 unsigned int vcc; 122 struct electra_cf_socket *cf; 123 124 cf = container_of(sock, struct electra_cf_socket, socket); 125 126 /* "reset" means no power in our case */ 127 vcc = (s->flags & SS_RESET) ? 0 : s->Vcc; 128 129 switch (vcc) { 130 case 0: 131 gpio = 0; 132 break; 133 case 33: 134 gpio = (1 << cf->gpio_3v); 135 break; 136 case 5: 137 gpio = (1 << cf->gpio_5v); 138 break; 139 default: 140 return -EINVAL; 141 } 142 143 gpio |= 1 << (cf->gpio_3v + 16); /* enwr */ 144 gpio |= 1 << (cf->gpio_5v + 16); /* enwr */ 145 out_le32(cf->gpio_base+0x90, gpio); 146 147 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n", 148 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask); 149 150 return 0; 151 } 152 153 static int electra_cf_set_io_map(struct pcmcia_socket *s, 154 struct pccard_io_map *io) 155 { 156 return 0; 157 } 158 159 static int electra_cf_set_mem_map(struct pcmcia_socket *s, 160 struct pccard_mem_map *map) 161 { 162 struct electra_cf_socket *cf; 163 164 if (map->card_start) 165 return -EINVAL; 166 cf = container_of(s, struct electra_cf_socket, socket); 167 map->static_start = cf->mem_phys; 168 map->flags &= MAP_ACTIVE|MAP_ATTRIB; 169 if (!(map->flags & MAP_ATTRIB)) 170 map->static_start += 0x800; 171 return 0; 172 } 173 174 static struct pccard_operations electra_cf_ops = { 175 .init = electra_cf_ss_init, 176 .get_status = electra_cf_get_status, 177 .set_socket = electra_cf_set_socket, 178 .set_io_map = electra_cf_set_io_map, 179 .set_mem_map = electra_cf_set_mem_map, 180 }; 181 182 static int __devinit electra_cf_probe(struct of_device *ofdev, 183 const struct of_device_id *match) 184 { 185 struct device *device = &ofdev->dev; 186 struct device_node *np = ofdev->node; 187 struct electra_cf_socket *cf; 188 struct resource mem, io; 189 int status; 190 const unsigned int *prop; 191 int err; 192 struct vm_struct *area; 193 194 err = of_address_to_resource(np, 0, &mem); 195 if (err) 196 return -EINVAL; 197 198 err = of_address_to_resource(np, 1, &io); 199 if (err) 200 return -EINVAL; 201 202 cf = kzalloc(sizeof *cf, GFP_KERNEL); 203 if (!cf) 204 return -ENOMEM; 205 206 setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf); 207 cf->irq = NO_IRQ; 208 209 cf->ofdev = ofdev; 210 cf->mem_phys = mem.start; 211 cf->mem_size = PAGE_ALIGN(mem.end - mem.start); 212 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size); 213 cf->io_size = PAGE_ALIGN(io.end - io.start); 214 215 area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END); 216 if (area == NULL) 217 return -ENOMEM; 218 219 cf->io_virt = (void __iomem *)(area->addr); 220 221 cf->gpio_base = ioremap(0xfc103000, 0x1000); 222 dev_set_drvdata(device, cf); 223 224 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base || 225 (__ioremap_at(io.start, cf->io_virt, cf->io_size, 226 _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) { 227 dev_err(device, "can't ioremap ranges\n"); 228 status = -ENOMEM; 229 goto fail1; 230 } 231 232 233 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END; 234 235 cf->iomem.start = (unsigned long)cf->mem_base; 236 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start); 237 cf->iomem.flags = IORESOURCE_MEM; 238 239 cf->irq = irq_of_parse_and_map(np, 0); 240 241 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED, 242 driver_name, cf); 243 if (status < 0) { 244 dev_err(device, "request_irq failed\n"); 245 goto fail1; 246 } 247 248 cf->socket.pci_irq = cf->irq; 249 250 prop = of_get_property(np, "card-detect-gpio", NULL); 251 if (!prop) 252 goto fail1; 253 cf->gpio_detect = *prop; 254 255 prop = of_get_property(np, "card-vsense-gpio", NULL); 256 if (!prop) 257 goto fail1; 258 cf->gpio_vsense = *prop; 259 260 prop = of_get_property(np, "card-3v-gpio", NULL); 261 if (!prop) 262 goto fail1; 263 cf->gpio_3v = *prop; 264 265 prop = of_get_property(np, "card-5v-gpio", NULL); 266 if (!prop) 267 goto fail1; 268 cf->gpio_5v = *prop; 269 270 cf->socket.io_offset = cf->io_base; 271 272 /* reserve chip-select regions */ 273 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) { 274 status = -ENXIO; 275 dev_err(device, "Can't claim memory region\n"); 276 goto fail1; 277 } 278 279 if (!request_region(cf->io_base, cf->io_size, driver_name)) { 280 status = -ENXIO; 281 dev_err(device, "Can't claim I/O region\n"); 282 goto fail2; 283 } 284 285 cf->socket.owner = THIS_MODULE; 286 cf->socket.dev.parent = &ofdev->dev; 287 cf->socket.ops = &electra_cf_ops; 288 cf->socket.resource_ops = &pccard_static_ops; 289 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | 290 SS_CAP_MEM_ALIGN; 291 cf->socket.map_size = 0x800; 292 293 status = pcmcia_register_socket(&cf->socket); 294 if (status < 0) { 295 dev_err(device, "pcmcia_register_socket failed\n"); 296 goto fail3; 297 } 298 299 dev_info(device, "at mem 0x%lx io 0x%lx irq %d\n", 300 cf->mem_phys, io.start, cf->irq); 301 302 cf->active = 1; 303 electra_cf_timer((unsigned long)cf); 304 return 0; 305 306 fail3: 307 release_region(cf->io_base, cf->io_size); 308 fail2: 309 release_mem_region(cf->mem_phys, cf->mem_size); 310 fail1: 311 if (cf->irq != NO_IRQ) 312 free_irq(cf->irq, cf); 313 314 if (cf->io_virt) 315 __iounmap_at(cf->io_virt, cf->io_size); 316 if (cf->mem_base) 317 iounmap(cf->mem_base); 318 if (cf->gpio_base) 319 iounmap(cf->gpio_base); 320 device_init_wakeup(&ofdev->dev, 0); 321 kfree(cf); 322 return status; 323 324 } 325 326 static int __devexit electra_cf_remove(struct of_device *ofdev) 327 { 328 struct device *device = &ofdev->dev; 329 struct electra_cf_socket *cf; 330 331 cf = dev_get_drvdata(device); 332 333 cf->active = 0; 334 pcmcia_unregister_socket(&cf->socket); 335 free_irq(cf->irq, cf); 336 del_timer_sync(&cf->timer); 337 338 __iounmap_at(cf->io_virt, cf->io_size); 339 iounmap(cf->mem_base); 340 iounmap(cf->gpio_base); 341 release_mem_region(cf->mem_phys, cf->mem_size); 342 release_region(cf->io_base, cf->io_size); 343 344 kfree(cf); 345 346 return 0; 347 } 348 349 static struct of_device_id electra_cf_match[] = { 350 { 351 .compatible = "electra-cf", 352 }, 353 {}, 354 }; 355 356 static struct of_platform_driver electra_cf_driver = { 357 .name = (char *)driver_name, 358 .match_table = electra_cf_match, 359 .probe = electra_cf_probe, 360 .remove = electra_cf_remove, 361 }; 362 363 static int __init electra_cf_init(void) 364 { 365 return of_register_platform_driver(&electra_cf_driver); 366 } 367 module_init(electra_cf_init); 368 369 static void __exit electra_cf_exit(void) 370 { 371 of_unregister_platform_driver(&electra_cf_driver); 372 } 373 module_exit(electra_cf_exit); 374 375 MODULE_LICENSE("GPL"); 376 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); 377 MODULE_DESCRIPTION("PA Semi Electra CF driver"); 378