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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2b571a06 OJ |
2 | /* |
3 | * Copyright (C) 2007 PA Semi, Inc | |
4 | * | |
5 | * Maintained by: Olof Johansson <olof@lixom.net> | |
6 | * | |
7 | * Based on drivers/pcmcia/omap_cf.c | |
2b571a06 OJ |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/interrupt.h> | |
27ac792c | 18 | #include <linux/mm.h> |
2b571a06 | 19 | #include <linux/vmalloc.h> |
5af50730 RH |
20 | #include <linux/of_address.h> |
21 | #include <linux/of_irq.h> | |
ad19dbdb | 22 | #include <linux/of_platform.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
2b571a06 OJ |
24 | |
25 | #include <pcmcia/ss.h> | |
2b571a06 OJ |
26 | |
27 | static const char driver_name[] = "electra-cf"; | |
28 | ||
29 | struct electra_cf_socket { | |
30 | struct pcmcia_socket socket; | |
31 | ||
32 | struct timer_list timer; | |
33 | unsigned present:1; | |
34 | unsigned active:1; | |
35 | ||
2dc11581 | 36 | struct platform_device *ofdev; |
2b571a06 | 37 | unsigned long mem_phys; |
0f06abd3 | 38 | void __iomem *mem_base; |
2b571a06 | 39 | unsigned long mem_size; |
0f06abd3 | 40 | void __iomem *io_virt; |
2b571a06 OJ |
41 | unsigned int io_base; |
42 | unsigned int io_size; | |
43 | u_int irq; | |
44 | struct resource iomem; | |
0f06abd3 | 45 | void __iomem *gpio_base; |
2b571a06 OJ |
46 | int gpio_detect; |
47 | int gpio_vsense; | |
48 | int gpio_3v; | |
49 | int gpio_5v; | |
50 | }; | |
51 | ||
52 | #define POLL_INTERVAL (2 * HZ) | |
53 | ||
54 | ||
55 | static int electra_cf_present(struct electra_cf_socket *cf) | |
56 | { | |
57 | unsigned int gpio; | |
58 | ||
59 | gpio = in_le32(cf->gpio_base+0x40); | |
60 | return !(gpio & (1 << cf->gpio_detect)); | |
61 | } | |
62 | ||
63 | static int electra_cf_ss_init(struct pcmcia_socket *s) | |
64 | { | |
65 | return 0; | |
66 | } | |
67 | ||
68 | /* the timer is primarily to kick this socket's pccardd */ | |
80c5a20b | 69 | static void electra_cf_timer(struct timer_list *t) |
2b571a06 | 70 | { |
80c5a20b | 71 | struct electra_cf_socket *cf = from_timer(cf, t, timer); |
2b571a06 OJ |
72 | int present = electra_cf_present(cf); |
73 | ||
74 | if (present != cf->present) { | |
75 | cf->present = present; | |
76 | pcmcia_parse_events(&cf->socket, SS_DETECT); | |
77 | } | |
78 | ||
79 | if (cf->active) | |
80 | mod_timer(&cf->timer, jiffies + POLL_INTERVAL); | |
81 | } | |
82 | ||
83 | static irqreturn_t electra_cf_irq(int irq, void *_cf) | |
84 | { | |
80c5a20b KC |
85 | struct electra_cf_socket *cf = _cf; |
86 | ||
87 | electra_cf_timer(&cf->timer); | |
2b571a06 OJ |
88 | return IRQ_HANDLED; |
89 | } | |
90 | ||
91 | static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp) | |
92 | { | |
93 | struct electra_cf_socket *cf; | |
94 | ||
95 | if (!sp) | |
96 | return -EINVAL; | |
97 | ||
98 | cf = container_of(s, struct electra_cf_socket, socket); | |
99 | ||
100 | /* NOTE CF is always 3VCARD */ | |
101 | if (electra_cf_present(cf)) { | |
102 | *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD; | |
103 | ||
104 | s->pci_irq = cf->irq; | |
105 | } else | |
106 | *sp = 0; | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static int electra_cf_set_socket(struct pcmcia_socket *sock, | |
111 | struct socket_state_t *s) | |
112 | { | |
113 | unsigned int gpio; | |
114 | unsigned int vcc; | |
115 | struct electra_cf_socket *cf; | |
116 | ||
117 | cf = container_of(sock, struct electra_cf_socket, socket); | |
118 | ||
119 | /* "reset" means no power in our case */ | |
120 | vcc = (s->flags & SS_RESET) ? 0 : s->Vcc; | |
121 | ||
122 | switch (vcc) { | |
123 | case 0: | |
124 | gpio = 0; | |
125 | break; | |
126 | case 33: | |
127 | gpio = (1 << cf->gpio_3v); | |
128 | break; | |
129 | case 5: | |
130 | gpio = (1 << cf->gpio_5v); | |
131 | break; | |
132 | default: | |
133 | return -EINVAL; | |
134 | } | |
135 | ||
136 | gpio |= 1 << (cf->gpio_3v + 16); /* enwr */ | |
137 | gpio |= 1 << (cf->gpio_5v + 16); /* enwr */ | |
138 | out_le32(cf->gpio_base+0x90, gpio); | |
139 | ||
140 | pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n", | |
141 | driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask); | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int electra_cf_set_io_map(struct pcmcia_socket *s, | |
147 | struct pccard_io_map *io) | |
148 | { | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int electra_cf_set_mem_map(struct pcmcia_socket *s, | |
153 | struct pccard_mem_map *map) | |
154 | { | |
155 | struct electra_cf_socket *cf; | |
156 | ||
157 | if (map->card_start) | |
158 | return -EINVAL; | |
159 | cf = container_of(s, struct electra_cf_socket, socket); | |
160 | map->static_start = cf->mem_phys; | |
161 | map->flags &= MAP_ACTIVE|MAP_ATTRIB; | |
162 | if (!(map->flags & MAP_ATTRIB)) | |
163 | map->static_start += 0x800; | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static struct pccard_operations electra_cf_ops = { | |
168 | .init = electra_cf_ss_init, | |
169 | .get_status = electra_cf_get_status, | |
170 | .set_socket = electra_cf_set_socket, | |
171 | .set_io_map = electra_cf_set_io_map, | |
172 | .set_mem_map = electra_cf_set_mem_map, | |
173 | }; | |
174 | ||
34cdf25a | 175 | static int electra_cf_probe(struct platform_device *ofdev) |
2b571a06 OJ |
176 | { |
177 | struct device *device = &ofdev->dev; | |
61c7a080 | 178 | struct device_node *np = ofdev->dev.of_node; |
2b571a06 OJ |
179 | struct electra_cf_socket *cf; |
180 | struct resource mem, io; | |
b274014c | 181 | int status = -ENOMEM; |
2b571a06 OJ |
182 | const unsigned int *prop; |
183 | int err; | |
2b571a06 OJ |
184 | |
185 | err = of_address_to_resource(np, 0, &mem); | |
186 | if (err) | |
187 | return -EINVAL; | |
188 | ||
189 | err = of_address_to_resource(np, 1, &io); | |
190 | if (err) | |
191 | return -EINVAL; | |
192 | ||
0f06abd3 | 193 | cf = kzalloc(sizeof(*cf), GFP_KERNEL); |
2b571a06 OJ |
194 | if (!cf) |
195 | return -ENOMEM; | |
196 | ||
80c5a20b | 197 | timer_setup(&cf->timer, electra_cf_timer, 0); |
6c8343e8 | 198 | cf->irq = 0; |
2b571a06 OJ |
199 | |
200 | cf->ofdev = ofdev; | |
201 | cf->mem_phys = mem.start; | |
28f65c11 | 202 | cf->mem_size = PAGE_ALIGN(resource_size(&mem)); |
2b571a06 | 203 | cf->mem_base = ioremap(cf->mem_phys, cf->mem_size); |
b274014c CH |
204 | if (!cf->mem_base) |
205 | goto out_free_cf; | |
28f65c11 | 206 | cf->io_size = PAGE_ALIGN(resource_size(&io)); |
b274014c CH |
207 | cf->io_virt = ioremap_phb(io.start, cf->io_size); |
208 | if (!cf->io_virt) | |
209 | goto out_unmap_mem; | |
2b571a06 OJ |
210 | |
211 | cf->gpio_base = ioremap(0xfc103000, 0x1000); | |
b274014c CH |
212 | if (!cf->gpio_base) |
213 | goto out_unmap_virt; | |
2b571a06 OJ |
214 | dev_set_drvdata(device, cf); |
215 | ||
2b571a06 | 216 | cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END; |
2b571a06 OJ |
217 | cf->iomem.start = (unsigned long)cf->mem_base; |
218 | cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start); | |
219 | cf->iomem.flags = IORESOURCE_MEM; | |
220 | ||
221 | cf->irq = irq_of_parse_and_map(np, 0); | |
222 | ||
223 | status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED, | |
224 | driver_name, cf); | |
225 | if (status < 0) { | |
226 | dev_err(device, "request_irq failed\n"); | |
227 | goto fail1; | |
228 | } | |
229 | ||
230 | cf->socket.pci_irq = cf->irq; | |
231 | ||
f15480e9 CJ |
232 | status = -EINVAL; |
233 | ||
2b571a06 OJ |
234 | prop = of_get_property(np, "card-detect-gpio", NULL); |
235 | if (!prop) | |
236 | goto fail1; | |
237 | cf->gpio_detect = *prop; | |
238 | ||
239 | prop = of_get_property(np, "card-vsense-gpio", NULL); | |
240 | if (!prop) | |
241 | goto fail1; | |
242 | cf->gpio_vsense = *prop; | |
243 | ||
244 | prop = of_get_property(np, "card-3v-gpio", NULL); | |
245 | if (!prop) | |
246 | goto fail1; | |
247 | cf->gpio_3v = *prop; | |
248 | ||
249 | prop = of_get_property(np, "card-5v-gpio", NULL); | |
250 | if (!prop) | |
251 | goto fail1; | |
252 | cf->gpio_5v = *prop; | |
253 | ||
254 | cf->socket.io_offset = cf->io_base; | |
255 | ||
256 | /* reserve chip-select regions */ | |
257 | if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) { | |
258 | status = -ENXIO; | |
259 | dev_err(device, "Can't claim memory region\n"); | |
260 | goto fail1; | |
261 | } | |
262 | ||
263 | if (!request_region(cf->io_base, cf->io_size, driver_name)) { | |
264 | status = -ENXIO; | |
265 | dev_err(device, "Can't claim I/O region\n"); | |
266 | goto fail2; | |
267 | } | |
268 | ||
269 | cf->socket.owner = THIS_MODULE; | |
270 | cf->socket.dev.parent = &ofdev->dev; | |
271 | cf->socket.ops = &electra_cf_ops; | |
272 | cf->socket.resource_ops = &pccard_static_ops; | |
273 | cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | | |
274 | SS_CAP_MEM_ALIGN; | |
275 | cf->socket.map_size = 0x800; | |
276 | ||
277 | status = pcmcia_register_socket(&cf->socket); | |
278 | if (status < 0) { | |
279 | dev_err(device, "pcmcia_register_socket failed\n"); | |
280 | goto fail3; | |
281 | } | |
282 | ||
fe333321 | 283 | dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n", |
2b571a06 OJ |
284 | cf->mem_phys, io.start, cf->irq); |
285 | ||
286 | cf->active = 1; | |
80c5a20b | 287 | electra_cf_timer(&cf->timer); |
2b571a06 OJ |
288 | return 0; |
289 | ||
290 | fail3: | |
291 | release_region(cf->io_base, cf->io_size); | |
292 | fail2: | |
293 | release_mem_region(cf->mem_phys, cf->mem_size); | |
294 | fail1: | |
6c8343e8 | 295 | if (cf->irq) |
2b571a06 OJ |
296 | free_irq(cf->irq, cf); |
297 | ||
b274014c CH |
298 | iounmap(cf->gpio_base); |
299 | out_unmap_virt: | |
300 | device_init_wakeup(&ofdev->dev, 0); | |
301 | iounmap(cf->io_virt); | |
302 | out_unmap_mem: | |
303 | iounmap(cf->mem_base); | |
304 | out_free_cf: | |
2b571a06 OJ |
305 | kfree(cf); |
306 | return status; | |
307 | ||
308 | } | |
309 | ||
e765a02c | 310 | static int electra_cf_remove(struct platform_device *ofdev) |
2b571a06 OJ |
311 | { |
312 | struct device *device = &ofdev->dev; | |
313 | struct electra_cf_socket *cf; | |
314 | ||
315 | cf = dev_get_drvdata(device); | |
316 | ||
317 | cf->active = 0; | |
318 | pcmcia_unregister_socket(&cf->socket); | |
319 | free_irq(cf->irq, cf); | |
320 | del_timer_sync(&cf->timer); | |
321 | ||
b274014c | 322 | iounmap(cf->io_virt); |
2b571a06 OJ |
323 | iounmap(cf->mem_base); |
324 | iounmap(cf->gpio_base); | |
325 | release_mem_region(cf->mem_phys, cf->mem_size); | |
326 | release_region(cf->io_base, cf->io_size); | |
327 | ||
328 | kfree(cf); | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
63c9a8b3 | 333 | static const struct of_device_id electra_cf_match[] = { |
2b571a06 OJ |
334 | { |
335 | .compatible = "electra-cf", | |
336 | }, | |
337 | {}, | |
338 | }; | |
c433a1b6 | 339 | MODULE_DEVICE_TABLE(of, electra_cf_match); |
2b571a06 | 340 | |
1c48a5c9 | 341 | static struct platform_driver electra_cf_driver = { |
4018294b | 342 | .driver = { |
4455d9fd | 343 | .name = driver_name, |
4018294b GL |
344 | .of_match_table = electra_cf_match, |
345 | }, | |
2b571a06 OJ |
346 | .probe = electra_cf_probe, |
347 | .remove = electra_cf_remove, | |
348 | }; | |
349 | ||
5d95f8e2 | 350 | module_platform_driver(electra_cf_driver); |
2b571a06 OJ |
351 | |
352 | MODULE_LICENSE("GPL"); | |
0f06abd3 | 353 | MODULE_AUTHOR("Olof Johansson <olof@lixom.net>"); |
2b571a06 | 354 | MODULE_DESCRIPTION("PA Semi Electra CF driver"); |