2 * Broadcom B43 wireless driver
4 * SDIO over Sonics Silicon Backplane bus glue for b43.
6 * Copyright (C) 2009 Albert Herranz
7 * Copyright (C) 2009 Michael Buesch <mb@bu3sch.de>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/mmc/card.h>
17 #include <linux/mmc/sdio_func.h>
18 #include <linux/mmc/sdio_ids.h>
19 #include <linux/slab.h>
20 #include <linux/ssb/ssb.h>
26 #define HNBU_CHIPID 0x01 /* vendor & device id */
28 #define B43_SDIO_BLOCK_SIZE 64 /* rx fifo max size in bytes */
31 static const struct b43_sdio_quirk {
35 } b43_sdio_quirks[] = {
36 { 0x14E4, 0x4318, SSB_QUIRK_SDIO_READ_AFTER_WRITE32, },
41 static unsigned int b43_sdio_get_quirks(u16 vendor, u16 device)
43 const struct b43_sdio_quirk *q;
45 for (q = b43_sdio_quirks; q->quirks; q++) {
46 if (vendor == q->vendor && device == q->device)
53 static void b43_sdio_interrupt_dispatcher(struct sdio_func *func)
55 struct b43_sdio *sdio = sdio_get_drvdata(func);
56 struct b43_wldev *dev = sdio->irq_handler_opaque;
58 if (unlikely(b43_status(dev) < B43_STAT_STARTED))
61 sdio_release_host(func);
62 sdio->irq_handler(dev);
63 sdio_claim_host(func);
66 int b43_sdio_request_irq(struct b43_wldev *dev,
67 void (*handler)(struct b43_wldev *dev))
69 struct ssb_bus *bus = dev->dev->bus;
70 struct sdio_func *func = bus->host_sdio;
71 struct b43_sdio *sdio = sdio_get_drvdata(func);
74 sdio->irq_handler_opaque = dev;
75 sdio->irq_handler = handler;
76 sdio_claim_host(func);
77 err = sdio_claim_irq(func, b43_sdio_interrupt_dispatcher);
78 sdio_release_host(func);
83 void b43_sdio_free_irq(struct b43_wldev *dev)
85 struct ssb_bus *bus = dev->dev->bus;
86 struct sdio_func *func = bus->host_sdio;
87 struct b43_sdio *sdio = sdio_get_drvdata(func);
89 sdio_claim_host(func);
90 sdio_release_irq(func);
91 sdio_release_host(func);
92 sdio->irq_handler_opaque = NULL;
93 sdio->irq_handler = NULL;
96 static int b43_sdio_probe(struct sdio_func *func,
97 const struct sdio_device_id *id)
99 struct b43_sdio *sdio;
100 struct sdio_func_tuple *tuple;
101 u16 vendor = 0, device = 0;
104 /* Look for the card chip identifier. */
105 tuple = func->tuples;
107 switch (tuple->code) {
109 switch (tuple->data[0]) {
111 if (tuple->size != 5)
113 vendor = tuple->data[1] | (tuple->data[2]<<8);
114 device = tuple->data[3] | (tuple->data[4]<<8);
115 dev_info(&func->dev, "Chip ID %04x:%04x\n",
127 if (!vendor || !device) {
132 sdio_claim_host(func);
133 error = sdio_set_block_size(func, B43_SDIO_BLOCK_SIZE);
135 dev_err(&func->dev, "failed to set block size to %u bytes,"
136 " error %d\n", B43_SDIO_BLOCK_SIZE, error);
137 goto err_release_host;
139 error = sdio_enable_func(func);
141 dev_err(&func->dev, "failed to enable func, error %d\n", error);
142 goto err_release_host;
144 sdio_release_host(func);
146 sdio = kzalloc(sizeof(*sdio), GFP_KERNEL);
149 dev_err(&func->dev, "failed to allocate ssb bus\n");
150 goto err_disable_func;
152 error = ssb_bus_sdiobus_register(&sdio->ssb, func,
153 b43_sdio_get_quirks(vendor, device));
155 dev_err(&func->dev, "failed to register ssb sdio bus,"
156 " error %d\n", error);
159 sdio_set_drvdata(func, sdio);
166 sdio_disable_func(func);
168 sdio_release_host(func);
173 static void b43_sdio_remove(struct sdio_func *func)
175 struct b43_sdio *sdio = sdio_get_drvdata(func);
177 ssb_bus_unregister(&sdio->ssb);
178 sdio_claim_host(func);
179 sdio_disable_func(func);
180 sdio_release_host(func);
182 sdio_set_drvdata(func, NULL);
185 static const struct sdio_device_id b43_sdio_ids[] = {
186 { SDIO_DEVICE(0x02d0, 0x044b) }, /* Nintendo Wii WLAN daughter card */
187 { SDIO_DEVICE(0x0092, 0x0004) }, /* C-guys, Inc. EW-CG1102GC */
191 static struct sdio_driver b43_sdio_driver = {
193 .id_table = b43_sdio_ids,
194 .probe = b43_sdio_probe,
195 .remove = b43_sdio_remove,
198 int b43_sdio_init(void)
200 return sdio_register_driver(&b43_sdio_driver);
203 void b43_sdio_exit(void)
205 sdio_unregister_driver(&b43_sdio_driver);