Commit | Line | Data |
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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 | ||
0273b4ef ML |
20 | #include <pcmcia/ss.h> |
21 | #include <pcmcia/cistpl.h> | |
22 | ||
23 | #include <asm/irq.h> | |
0273b4ef ML |
24 | #include <asm/mach-au1x00/au1000.h> |
25 | ||
26 | #define MEM_MAP_SIZE 0x400000 | |
27 | #define IO_MAP_SIZE 0x1000 | |
28 | ||
29 | ||
30 | /* | |
31 | * 3.3V cards only; all interfacing is done via gpios: | |
32 | * | |
33 | * 0/1: carddetect (00 = card present, xx = huh) | |
34 | * 4: card irq | |
35 | * 204: reset (high-act) | |
36 | * 205: buffer enable (low-act) | |
37 | * 208/209: card voltage key (00,01,10,11) | |
38 | * 210: battwarn | |
39 | * 211: batdead | |
40 | * 214: power (low-act) | |
41 | */ | |
42 | #define GPIO_CDA 0 | |
43 | #define GPIO_CDB 1 | |
44 | #define GPIO_CARDIRQ 4 | |
45 | #define GPIO_RESET 204 | |
46 | #define GPIO_OUTEN 205 | |
47 | #define GPIO_VSL 208 | |
48 | #define GPIO_VSH 209 | |
49 | #define GPIO_BATTDEAD 210 | |
50 | #define GPIO_BATTWARN 211 | |
51 | #define GPIO_POWER 214 | |
52 | ||
53 | struct xxs1500_pcmcia_sock { | |
54 | struct pcmcia_socket socket; | |
55 | void *virt_io; | |
56 | ||
11b897cf ML |
57 | phys_addr_t phys_io; |
58 | phys_addr_t phys_attr; | |
59 | phys_addr_t phys_mem; | |
0273b4ef ML |
60 | |
61 | /* previous flags for set_socket() */ | |
62 | unsigned int old_flags; | |
63 | }; | |
64 | ||
65 | #define to_xxs_socket(x) container_of(x, struct xxs1500_pcmcia_sock, socket) | |
66 | ||
67 | static irqreturn_t cdirq(int irq, void *data) | |
68 | { | |
69 | struct xxs1500_pcmcia_sock *sock = data; | |
70 | ||
71 | pcmcia_parse_events(&sock->socket, SS_DETECT); | |
72 | ||
73 | return IRQ_HANDLED; | |
74 | } | |
75 | ||
76 | static int xxs1500_pcmcia_configure(struct pcmcia_socket *skt, | |
77 | struct socket_state_t *state) | |
78 | { | |
79 | struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt); | |
80 | unsigned int changed; | |
81 | ||
82 | /* power control */ | |
83 | switch (state->Vcc) { | |
84 | case 0: | |
85 | gpio_set_value(GPIO_POWER, 1); /* power off */ | |
86 | break; | |
87 | case 33: | |
88 | gpio_set_value(GPIO_POWER, 0); /* power on */ | |
89 | break; | |
90 | case 50: | |
91 | default: | |
92 | return -EINVAL; | |
93 | } | |
94 | ||
95 | changed = state->flags ^ sock->old_flags; | |
96 | ||
97 | if (changed & SS_RESET) { | |
98 | if (state->flags & SS_RESET) { | |
99 | gpio_set_value(GPIO_RESET, 1); /* assert reset */ | |
100 | gpio_set_value(GPIO_OUTEN, 1); /* buffers off */ | |
101 | } else { | |
102 | gpio_set_value(GPIO_RESET, 0); /* deassert reset */ | |
103 | gpio_set_value(GPIO_OUTEN, 0); /* buffers on */ | |
104 | msleep(500); | |
105 | } | |
106 | } | |
107 | ||
108 | sock->old_flags = state->flags; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int xxs1500_pcmcia_get_status(struct pcmcia_socket *skt, | |
114 | unsigned int *value) | |
115 | { | |
116 | unsigned int status; | |
117 | int i; | |
118 | ||
119 | status = 0; | |
120 | ||
121 | /* check carddetects: GPIO[0:1] must both be low */ | |
122 | if (!gpio_get_value(GPIO_CDA) && !gpio_get_value(GPIO_CDB)) | |
123 | status |= SS_DETECT; | |
124 | ||
125 | /* determine card voltage: GPIO[208:209] binary value */ | |
126 | i = (!!gpio_get_value(GPIO_VSL)) | ((!!gpio_get_value(GPIO_VSH)) << 1); | |
127 | ||
128 | switch (i) { | |
129 | case 0: | |
130 | case 1: | |
131 | case 2: | |
132 | status |= SS_3VCARD; /* 3V card */ | |
133 | break; | |
134 | case 3: /* 5V card, unsupported */ | |
135 | default: | |
136 | status |= SS_XVCARD; /* treated as unsupported in core */ | |
137 | } | |
138 | ||
139 | /* GPIO214: low active power switch */ | |
140 | status |= gpio_get_value(GPIO_POWER) ? 0 : SS_POWERON; | |
141 | ||
142 | /* GPIO204: high-active reset line */ | |
143 | status |= gpio_get_value(GPIO_RESET) ? SS_RESET : SS_READY; | |
144 | ||
145 | /* other stuff */ | |
146 | status |= gpio_get_value(GPIO_BATTDEAD) ? 0 : SS_BATDEAD; | |
147 | status |= gpio_get_value(GPIO_BATTWARN) ? 0 : SS_BATWARN; | |
148 | ||
149 | *value = status; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int xxs1500_pcmcia_sock_init(struct pcmcia_socket *skt) | |
155 | { | |
156 | gpio_direction_input(GPIO_CDA); | |
157 | gpio_direction_input(GPIO_CDB); | |
158 | gpio_direction_input(GPIO_VSL); | |
159 | gpio_direction_input(GPIO_VSH); | |
160 | gpio_direction_input(GPIO_BATTDEAD); | |
161 | gpio_direction_input(GPIO_BATTWARN); | |
162 | gpio_direction_output(GPIO_RESET, 1); /* assert reset */ | |
163 | gpio_direction_output(GPIO_OUTEN, 1); /* disable buffers */ | |
164 | gpio_direction_output(GPIO_POWER, 1); /* power off */ | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | static int xxs1500_pcmcia_sock_suspend(struct pcmcia_socket *skt) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static int au1x00_pcmcia_set_io_map(struct pcmcia_socket *skt, | |
175 | struct pccard_io_map *map) | |
176 | { | |
177 | struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt); | |
178 | ||
179 | map->start = (u32)sock->virt_io; | |
180 | map->stop = map->start + IO_MAP_SIZE; | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *skt, | |
186 | struct pccard_mem_map *map) | |
187 | { | |
188 | struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt); | |
189 | ||
190 | if (map->flags & MAP_ATTRIB) | |
191 | map->static_start = sock->phys_attr + map->card_start; | |
192 | else | |
193 | map->static_start = sock->phys_mem + map->card_start; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | static struct pccard_operations xxs1500_pcmcia_operations = { | |
199 | .init = xxs1500_pcmcia_sock_init, | |
200 | .suspend = xxs1500_pcmcia_sock_suspend, | |
201 | .get_status = xxs1500_pcmcia_get_status, | |
202 | .set_socket = xxs1500_pcmcia_configure, | |
203 | .set_io_map = au1x00_pcmcia_set_io_map, | |
204 | .set_mem_map = au1x00_pcmcia_set_mem_map, | |
205 | }; | |
206 | ||
34cdf25a | 207 | static int xxs1500_pcmcia_probe(struct platform_device *pdev) |
0273b4ef ML |
208 | { |
209 | struct xxs1500_pcmcia_sock *sock; | |
210 | struct resource *r; | |
0273b4ef ML |
211 | int ret, irq; |
212 | ||
213 | sock = kzalloc(sizeof(struct xxs1500_pcmcia_sock), GFP_KERNEL); | |
214 | if (!sock) | |
215 | return -ENOMEM; | |
216 | ||
217 | ret = -ENODEV; | |
218 | ||
f25e188c | 219 | /* 36bit PCMCIA Attribute area address */ |
11b897cf | 220 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-attr"); |
0273b4ef | 221 | if (!r) { |
11b897cf | 222 | dev_err(&pdev->dev, "missing 'pcmcia-attr' resource!\n"); |
0273b4ef ML |
223 | goto out0; |
224 | } | |
225 | sock->phys_attr = r->start; | |
226 | ||
f25e188c | 227 | /* 36bit PCMCIA Memory area address */ |
11b897cf | 228 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-mem"); |
0273b4ef | 229 | if (!r) { |
11b897cf | 230 | dev_err(&pdev->dev, "missing 'pcmcia-mem' resource!\n"); |
0273b4ef ML |
231 | goto out0; |
232 | } | |
233 | sock->phys_mem = r->start; | |
234 | ||
f25e188c | 235 | /* 36bit PCMCIA IO area address */ |
11b897cf | 236 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-io"); |
0273b4ef | 237 | if (!r) { |
11b897cf | 238 | dev_err(&pdev->dev, "missing 'pcmcia-io' resource!\n"); |
0273b4ef ML |
239 | goto out0; |
240 | } | |
241 | sock->phys_io = r->start; | |
242 | ||
243 | ||
0273b4ef ML |
244 | /* |
245 | * PCMCIA client drivers use the inb/outb macros to access | |
246 | * the IO registers. Since mips_io_port_base is added | |
247 | * to the access address of the mips implementation of | |
248 | * inb/outb, we need to subtract it here because we want | |
249 | * to access the I/O or MEM address directly, without | |
250 | * going through this "mips_io_port_base" mechanism. | |
251 | */ | |
11b897cf | 252 | sock->virt_io = (void *)(ioremap(sock->phys_io, IO_MAP_SIZE) - |
0273b4ef ML |
253 | mips_io_port_base); |
254 | ||
255 | if (!sock->virt_io) { | |
256 | dev_err(&pdev->dev, "cannot remap IO area\n"); | |
257 | ret = -ENOMEM; | |
258 | goto out0; | |
259 | } | |
260 | ||
261 | sock->socket.ops = &xxs1500_pcmcia_operations; | |
262 | sock->socket.owner = THIS_MODULE; | |
263 | sock->socket.pci_irq = gpio_to_irq(GPIO_CARDIRQ); | |
264 | sock->socket.features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD; | |
265 | sock->socket.map_size = MEM_MAP_SIZE; | |
266 | sock->socket.io_offset = (unsigned long)sock->virt_io; | |
267 | sock->socket.dev.parent = &pdev->dev; | |
268 | sock->socket.resource_ops = &pccard_static_ops; | |
269 | ||
270 | platform_set_drvdata(pdev, sock); | |
271 | ||
272 | /* setup carddetect irq: use one of the 2 GPIOs as an | |
273 | * edge detector. | |
274 | */ | |
275 | irq = gpio_to_irq(GPIO_CDA); | |
dced35ae | 276 | irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH); |
0273b4ef ML |
277 | ret = request_irq(irq, cdirq, 0, "pcmcia_carddetect", sock); |
278 | if (ret) { | |
279 | dev_err(&pdev->dev, "cannot setup cd irq\n"); | |
280 | goto out1; | |
281 | } | |
282 | ||
283 | ret = pcmcia_register_socket(&sock->socket); | |
284 | if (ret) { | |
285 | dev_err(&pdev->dev, "failed to register\n"); | |
286 | goto out2; | |
287 | } | |
288 | ||
289 | printk(KERN_INFO "MyCable XXS1500 PCMCIA socket services\n"); | |
290 | ||
291 | return 0; | |
292 | ||
293 | out2: | |
294 | free_irq(gpio_to_irq(GPIO_CDA), sock); | |
295 | out1: | |
296 | iounmap((void *)(sock->virt_io + (u32)mips_io_port_base)); | |
297 | out0: | |
298 | kfree(sock); | |
299 | return ret; | |
300 | } | |
301 | ||
e765a02c | 302 | static int xxs1500_pcmcia_remove(struct platform_device *pdev) |
0273b4ef ML |
303 | { |
304 | struct xxs1500_pcmcia_sock *sock = platform_get_drvdata(pdev); | |
305 | ||
306 | pcmcia_unregister_socket(&sock->socket); | |
307 | free_irq(gpio_to_irq(GPIO_CDA), sock); | |
308 | iounmap((void *)(sock->virt_io + (u32)mips_io_port_base)); | |
309 | kfree(sock); | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static struct platform_driver xxs1500_pcmcia_socket_driver = { | |
315 | .driver = { | |
316 | .name = "xxs1500_pcmcia", | |
0273b4ef ML |
317 | }, |
318 | .probe = xxs1500_pcmcia_probe, | |
96364e3a | 319 | .remove = xxs1500_pcmcia_remove, |
0273b4ef ML |
320 | }; |
321 | ||
5d95f8e2 | 322 | module_platform_driver(xxs1500_pcmcia_socket_driver); |
0273b4ef ML |
323 | |
324 | MODULE_LICENSE("GPL"); | |
325 | MODULE_DESCRIPTION("PCMCIA Socket Services for MyCable XXS1500 systems"); | |
326 | MODULE_AUTHOR("Manuel Lauss"); |