2 * Copyright (C) 2007 PA Semi, Inc
4 * Maintained by: Olof Johansson <olof@lixom.net>
6 * Based on drivers/pcmcia/omap_cf.c
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.
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.
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
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>
32 #include <linux/vmalloc.h>
33 #include <linux/of_platform.h>
34 #include <linux/slab.h>
36 #include <pcmcia/ss.h>
38 static const char driver_name[] = "electra-cf";
40 struct electra_cf_socket {
41 struct pcmcia_socket socket;
43 struct timer_list timer;
47 struct platform_device *ofdev;
48 unsigned long mem_phys;
49 void __iomem * mem_base;
50 unsigned long mem_size;
51 void __iomem * io_virt;
55 struct resource iomem;
56 void __iomem * gpio_base;
63 #define POLL_INTERVAL (2 * HZ)
66 static int electra_cf_present(struct electra_cf_socket *cf)
70 gpio = in_le32(cf->gpio_base+0x40);
71 return !(gpio & (1 << cf->gpio_detect));
74 static int electra_cf_ss_init(struct pcmcia_socket *s)
79 /* the timer is primarily to kick this socket's pccardd */
80 static void electra_cf_timer(unsigned long _cf)
82 struct electra_cf_socket *cf = (void *) _cf;
83 int present = electra_cf_present(cf);
85 if (present != cf->present) {
86 cf->present = present;
87 pcmcia_parse_events(&cf->socket, SS_DETECT);
91 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
94 static irqreturn_t electra_cf_irq(int irq, void *_cf)
96 electra_cf_timer((unsigned long)_cf);
100 static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
102 struct electra_cf_socket *cf;
107 cf = container_of(s, struct electra_cf_socket, socket);
109 /* NOTE CF is always 3VCARD */
110 if (electra_cf_present(cf)) {
111 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
113 s->pci_irq = cf->irq;
119 static int electra_cf_set_socket(struct pcmcia_socket *sock,
120 struct socket_state_t *s)
124 struct electra_cf_socket *cf;
126 cf = container_of(sock, struct electra_cf_socket, socket);
128 /* "reset" means no power in our case */
129 vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
136 gpio = (1 << cf->gpio_3v);
139 gpio = (1 << cf->gpio_5v);
145 gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
146 gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
147 out_le32(cf->gpio_base+0x90, gpio);
149 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
150 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
155 static int electra_cf_set_io_map(struct pcmcia_socket *s,
156 struct pccard_io_map *io)
161 static int electra_cf_set_mem_map(struct pcmcia_socket *s,
162 struct pccard_mem_map *map)
164 struct electra_cf_socket *cf;
168 cf = container_of(s, struct electra_cf_socket, socket);
169 map->static_start = cf->mem_phys;
170 map->flags &= MAP_ACTIVE|MAP_ATTRIB;
171 if (!(map->flags & MAP_ATTRIB))
172 map->static_start += 0x800;
176 static struct pccard_operations electra_cf_ops = {
177 .init = electra_cf_ss_init,
178 .get_status = electra_cf_get_status,
179 .set_socket = electra_cf_set_socket,
180 .set_io_map = electra_cf_set_io_map,
181 .set_mem_map = electra_cf_set_mem_map,
184 static int electra_cf_probe(struct platform_device *ofdev)
186 struct device *device = &ofdev->dev;
187 struct device_node *np = ofdev->dev.of_node;
188 struct electra_cf_socket *cf;
189 struct resource mem, io;
191 const unsigned int *prop;
193 struct vm_struct *area;
195 err = of_address_to_resource(np, 0, &mem);
199 err = of_address_to_resource(np, 1, &io);
203 cf = kzalloc(sizeof *cf, GFP_KERNEL);
207 setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
211 cf->mem_phys = mem.start;
212 cf->mem_size = PAGE_ALIGN(resource_size(&mem));
213 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
214 cf->io_size = PAGE_ALIGN(resource_size(&io));
216 area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
220 cf->io_virt = (void __iomem *)(area->addr);
222 cf->gpio_base = ioremap(0xfc103000, 0x1000);
223 dev_set_drvdata(device, cf);
225 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
226 (__ioremap_at(io.start, cf->io_virt, cf->io_size,
227 _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) {
228 dev_err(device, "can't ioremap ranges\n");
234 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
236 cf->iomem.start = (unsigned long)cf->mem_base;
237 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
238 cf->iomem.flags = IORESOURCE_MEM;
240 cf->irq = irq_of_parse_and_map(np, 0);
242 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
245 dev_err(device, "request_irq failed\n");
249 cf->socket.pci_irq = cf->irq;
251 prop = of_get_property(np, "card-detect-gpio", NULL);
254 cf->gpio_detect = *prop;
256 prop = of_get_property(np, "card-vsense-gpio", NULL);
259 cf->gpio_vsense = *prop;
261 prop = of_get_property(np, "card-3v-gpio", NULL);
266 prop = of_get_property(np, "card-5v-gpio", NULL);
271 cf->socket.io_offset = cf->io_base;
273 /* reserve chip-select regions */
274 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
276 dev_err(device, "Can't claim memory region\n");
280 if (!request_region(cf->io_base, cf->io_size, driver_name)) {
282 dev_err(device, "Can't claim I/O region\n");
286 cf->socket.owner = THIS_MODULE;
287 cf->socket.dev.parent = &ofdev->dev;
288 cf->socket.ops = &electra_cf_ops;
289 cf->socket.resource_ops = &pccard_static_ops;
290 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
292 cf->socket.map_size = 0x800;
294 status = pcmcia_register_socket(&cf->socket);
296 dev_err(device, "pcmcia_register_socket failed\n");
300 dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
301 cf->mem_phys, io.start, cf->irq);
304 electra_cf_timer((unsigned long)cf);
308 release_region(cf->io_base, cf->io_size);
310 release_mem_region(cf->mem_phys, cf->mem_size);
312 if (cf->irq != NO_IRQ)
313 free_irq(cf->irq, cf);
316 __iounmap_at(cf->io_virt, cf->io_size);
318 iounmap(cf->mem_base);
320 iounmap(cf->gpio_base);
321 device_init_wakeup(&ofdev->dev, 0);
327 static int electra_cf_remove(struct platform_device *ofdev)
329 struct device *device = &ofdev->dev;
330 struct electra_cf_socket *cf;
332 cf = dev_get_drvdata(device);
335 pcmcia_unregister_socket(&cf->socket);
336 free_irq(cf->irq, cf);
337 del_timer_sync(&cf->timer);
339 __iounmap_at(cf->io_virt, cf->io_size);
340 iounmap(cf->mem_base);
341 iounmap(cf->gpio_base);
342 release_mem_region(cf->mem_phys, cf->mem_size);
343 release_region(cf->io_base, cf->io_size);
350 static const struct of_device_id electra_cf_match[] = {
352 .compatible = "electra-cf",
356 MODULE_DEVICE_TABLE(of, electra_cf_match);
358 static struct platform_driver electra_cf_driver = {
360 .name = (char *)driver_name,
361 .owner = THIS_MODULE,
362 .of_match_table = electra_cf_match,
364 .probe = electra_cf_probe,
365 .remove = electra_cf_remove,
368 module_platform_driver(electra_cf_driver);
370 MODULE_LICENSE("GPL");
371 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
372 MODULE_DESCRIPTION("PA Semi Electra CF driver");