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0273b4ef ML |
1 | /* |
2 | * PCMCIA socket code for the MyCable XXS1500 system. | |
3 | * | |
4 | * Copyright (c) 2009 Manuel Lauss <manuel.lauss@gmail.com> | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/delay.h> | |
9 | #include <linux/gpio.h> | |
10 | #include <linux/interrupt.h> | |
11 | #include <linux/io.h> | |
12 | #include <linux/ioport.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/pm.h> | |
16 | #include <linux/resource.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
0273b4ef ML |
18 | #include <linux/spinlock.h> |
19 | ||
20 | #include <pcmcia/cs_types.h> | |
21 | #include <pcmcia/cs.h> | |
22 | #include <pcmcia/ss.h> | |
23 | #include <pcmcia/cistpl.h> | |
24 | ||
25 | #include <asm/irq.h> | |
26 | #include <asm/system.h> | |
27 | #include <asm/mach-au1x00/au1000.h> | |
28 | ||
29 | #define MEM_MAP_SIZE 0x400000 | |
30 | #define IO_MAP_SIZE 0x1000 | |
31 | ||
32 | ||
33 | /* | |
34 | * 3.3V cards only; all interfacing is done via gpios: | |
35 | * | |
36 | * 0/1: carddetect (00 = card present, xx = huh) | |
37 | * 4: card irq | |
38 | * 204: reset (high-act) | |
39 | * 205: buffer enable (low-act) | |
40 | * 208/209: card voltage key (00,01,10,11) | |
41 | * 210: battwarn | |
42 | * 211: batdead | |
43 | * 214: power (low-act) | |
44 | */ | |
45 | #define GPIO_CDA 0 | |
46 | #define GPIO_CDB 1 | |
47 | #define GPIO_CARDIRQ 4 | |
48 | #define GPIO_RESET 204 | |
49 | #define GPIO_OUTEN 205 | |
50 | #define GPIO_VSL 208 | |
51 | #define GPIO_VSH 209 | |
52 | #define GPIO_BATTDEAD 210 | |
53 | #define GPIO_BATTWARN 211 | |
54 | #define GPIO_POWER 214 | |
55 | ||
56 | struct xxs1500_pcmcia_sock { | |
57 | struct pcmcia_socket socket; | |
58 | void *virt_io; | |
59 | ||
11b897cf ML |
60 | phys_addr_t phys_io; |
61 | phys_addr_t phys_attr; | |
62 | phys_addr_t phys_mem; | |
0273b4ef ML |
63 | |
64 | /* previous flags for set_socket() */ | |
65 | unsigned int old_flags; | |
66 | }; | |
67 | ||
68 | #define to_xxs_socket(x) container_of(x, struct xxs1500_pcmcia_sock, socket) | |
69 | ||
70 | static irqreturn_t cdirq(int irq, void *data) | |
71 | { | |
72 | struct xxs1500_pcmcia_sock *sock = data; | |
73 | ||
74 | pcmcia_parse_events(&sock->socket, SS_DETECT); | |
75 | ||
76 | return IRQ_HANDLED; | |
77 | } | |
78 | ||
79 | static int xxs1500_pcmcia_configure(struct pcmcia_socket *skt, | |
80 | struct socket_state_t *state) | |
81 | { | |
82 | struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt); | |
83 | unsigned int changed; | |
84 | ||
85 | /* power control */ | |
86 | switch (state->Vcc) { | |
87 | case 0: | |
88 | gpio_set_value(GPIO_POWER, 1); /* power off */ | |
89 | break; | |
90 | case 33: | |
91 | gpio_set_value(GPIO_POWER, 0); /* power on */ | |
92 | break; | |
93 | case 50: | |
94 | default: | |
95 | return -EINVAL; | |
96 | } | |
97 | ||
98 | changed = state->flags ^ sock->old_flags; | |
99 | ||
100 | if (changed & SS_RESET) { | |
101 | if (state->flags & SS_RESET) { | |
102 | gpio_set_value(GPIO_RESET, 1); /* assert reset */ | |
103 | gpio_set_value(GPIO_OUTEN, 1); /* buffers off */ | |
104 | } else { | |
105 | gpio_set_value(GPIO_RESET, 0); /* deassert reset */ | |
106 | gpio_set_value(GPIO_OUTEN, 0); /* buffers on */ | |
107 | msleep(500); | |
108 | } | |
109 | } | |
110 | ||
111 | sock->old_flags = state->flags; | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
116 | static int xxs1500_pcmcia_get_status(struct pcmcia_socket *skt, | |
117 | unsigned int *value) | |
118 | { | |
119 | unsigned int status; | |
120 | int i; | |
121 | ||
122 | status = 0; | |
123 | ||
124 | /* check carddetects: GPIO[0:1] must both be low */ | |
125 | if (!gpio_get_value(GPIO_CDA) && !gpio_get_value(GPIO_CDB)) | |
126 | status |= SS_DETECT; | |
127 | ||
128 | /* determine card voltage: GPIO[208:209] binary value */ | |
129 | i = (!!gpio_get_value(GPIO_VSL)) | ((!!gpio_get_value(GPIO_VSH)) << 1); | |
130 | ||
131 | switch (i) { | |
132 | case 0: | |
133 | case 1: | |
134 | case 2: | |
135 | status |= SS_3VCARD; /* 3V card */ | |
136 | break; | |
137 | case 3: /* 5V card, unsupported */ | |
138 | default: | |
139 | status |= SS_XVCARD; /* treated as unsupported in core */ | |
140 | } | |
141 | ||
142 | /* GPIO214: low active power switch */ | |
143 | status |= gpio_get_value(GPIO_POWER) ? 0 : SS_POWERON; | |
144 | ||
145 | /* GPIO204: high-active reset line */ | |
146 | status |= gpio_get_value(GPIO_RESET) ? SS_RESET : SS_READY; | |
147 | ||
148 | /* other stuff */ | |
149 | status |= gpio_get_value(GPIO_BATTDEAD) ? 0 : SS_BATDEAD; | |
150 | status |= gpio_get_value(GPIO_BATTWARN) ? 0 : SS_BATWARN; | |
151 | ||
152 | *value = status; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static int xxs1500_pcmcia_sock_init(struct pcmcia_socket *skt) | |
158 | { | |
159 | gpio_direction_input(GPIO_CDA); | |
160 | gpio_direction_input(GPIO_CDB); | |
161 | gpio_direction_input(GPIO_VSL); | |
162 | gpio_direction_input(GPIO_VSH); | |
163 | gpio_direction_input(GPIO_BATTDEAD); | |
164 | gpio_direction_input(GPIO_BATTWARN); | |
165 | gpio_direction_output(GPIO_RESET, 1); /* assert reset */ | |
166 | gpio_direction_output(GPIO_OUTEN, 1); /* disable buffers */ | |
167 | gpio_direction_output(GPIO_POWER, 1); /* power off */ | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int xxs1500_pcmcia_sock_suspend(struct pcmcia_socket *skt) | |
173 | { | |
174 | return 0; | |
175 | } | |
176 | ||
177 | static int au1x00_pcmcia_set_io_map(struct pcmcia_socket *skt, | |
178 | struct pccard_io_map *map) | |
179 | { | |
180 | struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt); | |
181 | ||
182 | map->start = (u32)sock->virt_io; | |
183 | map->stop = map->start + IO_MAP_SIZE; | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *skt, | |
189 | struct pccard_mem_map *map) | |
190 | { | |
191 | struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt); | |
192 | ||
193 | if (map->flags & MAP_ATTRIB) | |
194 | map->static_start = sock->phys_attr + map->card_start; | |
195 | else | |
196 | map->static_start = sock->phys_mem + map->card_start; | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static struct pccard_operations xxs1500_pcmcia_operations = { | |
202 | .init = xxs1500_pcmcia_sock_init, | |
203 | .suspend = xxs1500_pcmcia_sock_suspend, | |
204 | .get_status = xxs1500_pcmcia_get_status, | |
205 | .set_socket = xxs1500_pcmcia_configure, | |
206 | .set_io_map = au1x00_pcmcia_set_io_map, | |
207 | .set_mem_map = au1x00_pcmcia_set_mem_map, | |
208 | }; | |
209 | ||
210 | static int __devinit xxs1500_pcmcia_probe(struct platform_device *pdev) | |
211 | { | |
212 | struct xxs1500_pcmcia_sock *sock; | |
213 | struct resource *r; | |
0273b4ef ML |
214 | int ret, irq; |
215 | ||
216 | sock = kzalloc(sizeof(struct xxs1500_pcmcia_sock), GFP_KERNEL); | |
217 | if (!sock) | |
218 | return -ENOMEM; | |
219 | ||
220 | ret = -ENODEV; | |
221 | ||
f25e188c | 222 | /* 36bit PCMCIA Attribute area address */ |
11b897cf | 223 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-attr"); |
0273b4ef | 224 | if (!r) { |
11b897cf | 225 | dev_err(&pdev->dev, "missing 'pcmcia-attr' resource!\n"); |
0273b4ef ML |
226 | goto out0; |
227 | } | |
228 | sock->phys_attr = r->start; | |
229 | ||
f25e188c | 230 | /* 36bit PCMCIA Memory area address */ |
11b897cf | 231 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-mem"); |
0273b4ef | 232 | if (!r) { |
11b897cf | 233 | dev_err(&pdev->dev, "missing 'pcmcia-mem' resource!\n"); |
0273b4ef ML |
234 | goto out0; |
235 | } | |
236 | sock->phys_mem = r->start; | |
237 | ||
f25e188c | 238 | /* 36bit PCMCIA IO area address */ |
11b897cf | 239 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-io"); |
0273b4ef | 240 | if (!r) { |
11b897cf | 241 | dev_err(&pdev->dev, "missing 'pcmcia-io' resource!\n"); |
0273b4ef ML |
242 | goto out0; |
243 | } | |
244 | sock->phys_io = r->start; | |
245 | ||
246 | ||
0273b4ef ML |
247 | /* |
248 | * PCMCIA client drivers use the inb/outb macros to access | |
249 | * the IO registers. Since mips_io_port_base is added | |
250 | * to the access address of the mips implementation of | |
251 | * inb/outb, we need to subtract it here because we want | |
252 | * to access the I/O or MEM address directly, without | |
253 | * going through this "mips_io_port_base" mechanism. | |
254 | */ | |
11b897cf | 255 | sock->virt_io = (void *)(ioremap(sock->phys_io, IO_MAP_SIZE) - |
0273b4ef ML |
256 | mips_io_port_base); |
257 | ||
258 | if (!sock->virt_io) { | |
259 | dev_err(&pdev->dev, "cannot remap IO area\n"); | |
260 | ret = -ENOMEM; | |
261 | goto out0; | |
262 | } | |
263 | ||
264 | sock->socket.ops = &xxs1500_pcmcia_operations; | |
265 | sock->socket.owner = THIS_MODULE; | |
266 | sock->socket.pci_irq = gpio_to_irq(GPIO_CARDIRQ); | |
267 | sock->socket.features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD; | |
268 | sock->socket.map_size = MEM_MAP_SIZE; | |
269 | sock->socket.io_offset = (unsigned long)sock->virt_io; | |
270 | sock->socket.dev.parent = &pdev->dev; | |
271 | sock->socket.resource_ops = &pccard_static_ops; | |
272 | ||
273 | platform_set_drvdata(pdev, sock); | |
274 | ||
275 | /* setup carddetect irq: use one of the 2 GPIOs as an | |
276 | * edge detector. | |
277 | */ | |
278 | irq = gpio_to_irq(GPIO_CDA); | |
279 | set_irq_type(irq, IRQ_TYPE_EDGE_BOTH); | |
280 | ret = request_irq(irq, cdirq, 0, "pcmcia_carddetect", sock); | |
281 | if (ret) { | |
282 | dev_err(&pdev->dev, "cannot setup cd irq\n"); | |
283 | goto out1; | |
284 | } | |
285 | ||
286 | ret = pcmcia_register_socket(&sock->socket); | |
287 | if (ret) { | |
288 | dev_err(&pdev->dev, "failed to register\n"); | |
289 | goto out2; | |
290 | } | |
291 | ||
292 | printk(KERN_INFO "MyCable XXS1500 PCMCIA socket services\n"); | |
293 | ||
294 | return 0; | |
295 | ||
296 | out2: | |
297 | free_irq(gpio_to_irq(GPIO_CDA), sock); | |
298 | out1: | |
299 | iounmap((void *)(sock->virt_io + (u32)mips_io_port_base)); | |
300 | out0: | |
301 | kfree(sock); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | static int __devexit xxs1500_pcmcia_remove(struct platform_device *pdev) | |
306 | { | |
307 | struct xxs1500_pcmcia_sock *sock = platform_get_drvdata(pdev); | |
308 | ||
309 | pcmcia_unregister_socket(&sock->socket); | |
310 | free_irq(gpio_to_irq(GPIO_CDA), sock); | |
311 | iounmap((void *)(sock->virt_io + (u32)mips_io_port_base)); | |
312 | kfree(sock); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static struct platform_driver xxs1500_pcmcia_socket_driver = { | |
318 | .driver = { | |
319 | .name = "xxs1500_pcmcia", | |
320 | .owner = THIS_MODULE, | |
321 | }, | |
322 | .probe = xxs1500_pcmcia_probe, | |
323 | .remove = __devexit_p(xxs1500_pcmcia_remove), | |
324 | }; | |
325 | ||
326 | int __init xxs1500_pcmcia_socket_load(void) | |
327 | { | |
328 | return platform_driver_register(&xxs1500_pcmcia_socket_driver); | |
329 | } | |
330 | ||
331 | void __exit xxs1500_pcmcia_socket_unload(void) | |
332 | { | |
333 | platform_driver_unregister(&xxs1500_pcmcia_socket_driver); | |
334 | } | |
335 | ||
336 | module_init(xxs1500_pcmcia_socket_load); | |
337 | module_exit(xxs1500_pcmcia_socket_unload); | |
338 | ||
339 | MODULE_LICENSE("GPL"); | |
340 | MODULE_DESCRIPTION("PCMCIA Socket Services for MyCable XXS1500 systems"); | |
341 | MODULE_AUTHOR("Manuel Lauss"); |