2 * PCMCIA socket code for the MyCable XXS1500 system.
4 * Copyright (c) 2009 Manuel Lauss <manuel.lauss@gmail.com>
8 #include <linux/delay.h>
9 #include <linux/gpio.h>
10 #include <linux/interrupt.h>
12 #include <linux/ioport.h>
14 #include <linux/platform_device.h>
16 #include <linux/resource.h>
17 #include <linux/slab.h>
18 #include <linux/spinlock.h>
20 #include <pcmcia/ss.h>
21 #include <pcmcia/cistpl.h>
24 #include <asm/mach-au1x00/au1000.h>
26 #define MEM_MAP_SIZE 0x400000
27 #define IO_MAP_SIZE 0x1000
31 * 3.3V cards only; all interfacing is done via gpios:
33 * 0/1: carddetect (00 = card present, xx = huh)
35 * 204: reset (high-act)
36 * 205: buffer enable (low-act)
37 * 208/209: card voltage key (00,01,10,11)
40 * 214: power (low-act)
44 #define GPIO_CARDIRQ 4
45 #define GPIO_RESET 204
46 #define GPIO_OUTEN 205
49 #define GPIO_BATTDEAD 210
50 #define GPIO_BATTWARN 211
51 #define GPIO_POWER 214
53 struct xxs1500_pcmcia_sock {
54 struct pcmcia_socket socket;
58 phys_addr_t phys_attr;
61 /* previous flags for set_socket() */
62 unsigned int old_flags;
65 #define to_xxs_socket(x) container_of(x, struct xxs1500_pcmcia_sock, socket)
67 static irqreturn_t cdirq(int irq, void *data)
69 struct xxs1500_pcmcia_sock *sock = data;
71 pcmcia_parse_events(&sock->socket, SS_DETECT);
76 static int xxs1500_pcmcia_configure(struct pcmcia_socket *skt,
77 struct socket_state_t *state)
79 struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
85 gpio_set_value(GPIO_POWER, 1); /* power off */
88 gpio_set_value(GPIO_POWER, 0); /* power on */
95 changed = state->flags ^ sock->old_flags;
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 */
102 gpio_set_value(GPIO_RESET, 0); /* deassert reset */
103 gpio_set_value(GPIO_OUTEN, 0); /* buffers on */
108 sock->old_flags = state->flags;
113 static int xxs1500_pcmcia_get_status(struct pcmcia_socket *skt,
121 /* check carddetects: GPIO[0:1] must both be low */
122 if (!gpio_get_value(GPIO_CDA) && !gpio_get_value(GPIO_CDB))
125 /* determine card voltage: GPIO[208:209] binary value */
126 i = (!!gpio_get_value(GPIO_VSL)) | ((!!gpio_get_value(GPIO_VSH)) << 1);
132 status |= SS_3VCARD; /* 3V card */
134 case 3: /* 5V card, unsupported */
136 status |= SS_XVCARD; /* treated as unsupported in core */
139 /* GPIO214: low active power switch */
140 status |= gpio_get_value(GPIO_POWER) ? 0 : SS_POWERON;
142 /* GPIO204: high-active reset line */
143 status |= gpio_get_value(GPIO_RESET) ? SS_RESET : SS_READY;
146 status |= gpio_get_value(GPIO_BATTDEAD) ? 0 : SS_BATDEAD;
147 status |= gpio_get_value(GPIO_BATTWARN) ? 0 : SS_BATWARN;
154 static int xxs1500_pcmcia_sock_init(struct pcmcia_socket *skt)
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 */
169 static int xxs1500_pcmcia_sock_suspend(struct pcmcia_socket *skt)
174 static int au1x00_pcmcia_set_io_map(struct pcmcia_socket *skt,
175 struct pccard_io_map *map)
177 struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
179 map->start = (u32)sock->virt_io;
180 map->stop = map->start + IO_MAP_SIZE;
185 static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *skt,
186 struct pccard_mem_map *map)
188 struct xxs1500_pcmcia_sock *sock = to_xxs_socket(skt);
190 if (map->flags & MAP_ATTRIB)
191 map->static_start = sock->phys_attr + map->card_start;
193 map->static_start = sock->phys_mem + map->card_start;
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,
207 static int __devinit xxs1500_pcmcia_probe(struct platform_device *pdev)
209 struct xxs1500_pcmcia_sock *sock;
213 sock = kzalloc(sizeof(struct xxs1500_pcmcia_sock), GFP_KERNEL);
219 /* 36bit PCMCIA Attribute area address */
220 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-attr");
222 dev_err(&pdev->dev, "missing 'pcmcia-attr' resource!\n");
225 sock->phys_attr = r->start;
227 /* 36bit PCMCIA Memory area address */
228 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-mem");
230 dev_err(&pdev->dev, "missing 'pcmcia-mem' resource!\n");
233 sock->phys_mem = r->start;
235 /* 36bit PCMCIA IO area address */
236 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcmcia-io");
238 dev_err(&pdev->dev, "missing 'pcmcia-io' resource!\n");
241 sock->phys_io = r->start;
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.
252 sock->virt_io = (void *)(ioremap(sock->phys_io, IO_MAP_SIZE) -
255 if (!sock->virt_io) {
256 dev_err(&pdev->dev, "cannot remap IO area\n");
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;
270 platform_set_drvdata(pdev, sock);
272 /* setup carddetect irq: use one of the 2 GPIOs as an
275 irq = gpio_to_irq(GPIO_CDA);
276 irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
277 ret = request_irq(irq, cdirq, 0, "pcmcia_carddetect", sock);
279 dev_err(&pdev->dev, "cannot setup cd irq\n");
283 ret = pcmcia_register_socket(&sock->socket);
285 dev_err(&pdev->dev, "failed to register\n");
289 printk(KERN_INFO "MyCable XXS1500 PCMCIA socket services\n");
294 free_irq(gpio_to_irq(GPIO_CDA), sock);
296 iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
302 static int __devexit xxs1500_pcmcia_remove(struct platform_device *pdev)
304 struct xxs1500_pcmcia_sock *sock = platform_get_drvdata(pdev);
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));
314 static struct platform_driver xxs1500_pcmcia_socket_driver = {
316 .name = "xxs1500_pcmcia",
317 .owner = THIS_MODULE,
319 .probe = xxs1500_pcmcia_probe,
320 .remove = xxs1500_pcmcia_remove,
323 module_platform_driver(xxs1500_pcmcia_socket_driver);
325 MODULE_LICENSE("GPL");
326 MODULE_DESCRIPTION("PCMCIA Socket Services for MyCable XXS1500 systems");
327 MODULE_AUTHOR("Manuel Lauss");