1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Broadcom B43 wireless driver
5 * SDIO over Sonics Silicon Backplane bus glue for b43.
7 * Copyright (C) 2009 Albert Herranz
8 * Copyright (C) 2009 Michael Buesch <m@bues.ch>
11 #include <linux/kernel.h>
12 #include <linux/mmc/card.h>
13 #include <linux/mmc/sdio_func.h>
14 #include <linux/mmc/sdio_ids.h>
15 #include <linux/slab.h>
16 #include <linux/ssb/ssb.h>
22 #define HNBU_CHIPID 0x01 /* vendor & device id */
24 #define B43_SDIO_BLOCK_SIZE 64 /* rx fifo max size in bytes */
27 static const struct b43_sdio_quirk {
31 } b43_sdio_quirks[] = {
32 { 0x14E4, 0x4318, SSB_QUIRK_SDIO_READ_AFTER_WRITE32, },
37 static unsigned int b43_sdio_get_quirks(u16 vendor, u16 device)
39 const struct b43_sdio_quirk *q;
41 for (q = b43_sdio_quirks; q->quirks; q++) {
42 if (vendor == q->vendor && device == q->device)
49 static void b43_sdio_interrupt_dispatcher(struct sdio_func *func)
51 struct b43_sdio *sdio = sdio_get_drvdata(func);
52 struct b43_wldev *dev = sdio->irq_handler_opaque;
54 if (unlikely(b43_status(dev) < B43_STAT_STARTED))
57 sdio_release_host(func);
58 sdio->irq_handler(dev);
59 sdio_claim_host(func);
62 int b43_sdio_request_irq(struct b43_wldev *dev,
63 void (*handler)(struct b43_wldev *dev))
65 struct ssb_bus *bus = dev->dev->sdev->bus;
66 struct sdio_func *func = bus->host_sdio;
67 struct b43_sdio *sdio = sdio_get_drvdata(func);
70 sdio->irq_handler_opaque = dev;
71 sdio->irq_handler = handler;
72 sdio_claim_host(func);
73 err = sdio_claim_irq(func, b43_sdio_interrupt_dispatcher);
74 sdio_release_host(func);
79 void b43_sdio_free_irq(struct b43_wldev *dev)
81 struct ssb_bus *bus = dev->dev->sdev->bus;
82 struct sdio_func *func = bus->host_sdio;
83 struct b43_sdio *sdio = sdio_get_drvdata(func);
85 sdio_claim_host(func);
86 sdio_release_irq(func);
87 sdio_release_host(func);
88 sdio->irq_handler_opaque = NULL;
89 sdio->irq_handler = NULL;
92 static int b43_sdio_probe(struct sdio_func *func,
93 const struct sdio_device_id *id)
95 struct b43_sdio *sdio;
96 struct sdio_func_tuple *tuple;
97 u16 vendor = 0, device = 0;
100 /* Look for the card chip identifier. */
101 tuple = func->tuples;
103 switch (tuple->code) {
105 switch (tuple->data[0]) {
107 if (tuple->size != 5)
109 vendor = tuple->data[1] | (tuple->data[2]<<8);
110 device = tuple->data[3] | (tuple->data[4]<<8);
111 dev_info(&func->dev, "Chip ID %04x:%04x\n",
123 if (!vendor || !device) {
128 sdio_claim_host(func);
129 error = sdio_set_block_size(func, B43_SDIO_BLOCK_SIZE);
131 dev_err(&func->dev, "failed to set block size to %u bytes,"
132 " error %d\n", B43_SDIO_BLOCK_SIZE, error);
133 goto err_release_host;
135 error = sdio_enable_func(func);
137 dev_err(&func->dev, "failed to enable func, error %d\n", error);
138 goto err_release_host;
140 sdio_release_host(func);
142 sdio = kzalloc(sizeof(*sdio), GFP_KERNEL);
145 dev_err(&func->dev, "failed to allocate ssb bus\n");
146 goto err_disable_func;
148 error = ssb_bus_sdiobus_register(&sdio->ssb, func,
149 b43_sdio_get_quirks(vendor, device));
151 dev_err(&func->dev, "failed to register ssb sdio bus,"
152 " error %d\n", error);
155 sdio_set_drvdata(func, sdio);
162 sdio_claim_host(func);
163 sdio_disable_func(func);
165 sdio_release_host(func);
170 static void b43_sdio_remove(struct sdio_func *func)
172 struct b43_sdio *sdio = sdio_get_drvdata(func);
174 ssb_bus_unregister(&sdio->ssb);
175 sdio_claim_host(func);
176 sdio_disable_func(func);
177 sdio_release_host(func);
179 sdio_set_drvdata(func, NULL);
182 static const struct sdio_device_id b43_sdio_ids[] = {
183 { SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_NINTENDO_WII) },
184 { SDIO_DEVICE(SDIO_VENDOR_ID_CGUYS, SDIO_DEVICE_ID_CGUYS_EW_CG1102GC) },
188 static struct sdio_driver b43_sdio_driver = {
190 .id_table = b43_sdio_ids,
191 .probe = b43_sdio_probe,
192 .remove = b43_sdio_remove,
195 int b43_sdio_init(void)
197 return sdio_register_driver(&b43_sdio_driver);
200 void b43_sdio_exit(void)
202 sdio_unregister_driver(&b43_sdio_driver);