b43: Add Soft-MAC SDIO device support

This adds support for Soft-MAC SDIO devices to b43.
The driver still lacks some fixes for SDIO devices, so it's currently
marked as BROKEN.

Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 197 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/sdio.c b/drivers/net/wireless/b43/sdio.c
new file mode 100644
index 000000000000..2d337f1a60b2
--- /dev/null
+++ b/drivers/net/wireless/b43/sdio.c
@@ -0,0 +1,197 @@
+/*
+ * Broadcom B43 wireless driver
+ *
+ * SDIO over Sonics Silicon Backplane bus glue for b43.
+ *
+ * Copyright (C) 2009 Albert Herranz
+ * Copyright (C) 2009 Michael Buesch <mb@bu3sch.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/ssb/ssb.h>
+
+#include "sdio.h"
+#include "b43.h"
+
+
+#define HNBU_CHIPID             0x01    /* vendor & device id */
+
+#define B43_SDIO_BLOCK_SIZE     64      /* rx fifo max size in bytes */
+
+
+static const struct b43_sdio_quirk {
+        u16 vendor;
+        u16 device;
+        unsigned int quirks;
+} b43_sdio_quirks[] = {
+        { 0x14E4, 0x4318, SSB_QUIRK_SDIO_READ_AFTER_WRITE32, },
+        { },
+};
+
+
+static unsigned int b43_sdio_get_quirks(u16 vendor, u16 device)
+{
+        const struct b43_sdio_quirk *q;
+
+        for (q = b43_sdio_quirks; q->quirks; q++) {
+                if (vendor == q->vendor && device == q->device)
+                        return q->quirks;
+        }
+
+        return 0;
+}
+
+static void b43_sdio_interrupt_dispatcher(struct sdio_func *func)
+{
+        struct b43_sdio *sdio = sdio_get_drvdata(func);
+        struct b43_wldev *dev = sdio->irq_handler_opaque;
+
+        sdio->irq_handler(dev);
+}
+
+int b43_sdio_request_irq(struct b43_wldev *dev,
+                         void (*handler)(struct b43_wldev *dev))
+{
+        struct ssb_bus *bus = dev->dev->bus;
+        struct sdio_func *func = bus->host_sdio;
+        struct b43_sdio *sdio = sdio_get_drvdata(func);
+        int err;
+
+        sdio->irq_handler_opaque = dev;
+        sdio->irq_handler = handler;
+        sdio_claim_host(func);
+        err = sdio_claim_irq(func, b43_sdio_interrupt_dispatcher);
+        sdio_release_host(func);
+
+        return err;
+}
+
+void b43_sdio_free_irq(struct b43_wldev *dev)
+{
+        struct ssb_bus *bus = dev->dev->bus;
+        struct sdio_func *func = bus->host_sdio;
+        struct b43_sdio *sdio = sdio_get_drvdata(func);
+
+        sdio_claim_host(func);
+        sdio_release_irq(func);
+        sdio_release_host(func);
+        sdio->irq_handler_opaque = NULL;
+        sdio->irq_handler = NULL;
+}
+
+static int b43_sdio_probe(struct sdio_func *func,
+                          const struct sdio_device_id *id)
+{
+        struct b43_sdio *sdio;
+        struct sdio_func_tuple *tuple;
+        u16 vendor = 0, device = 0;
+        int error;
+
+        /* Look for the card chip identifier. */
+        tuple = func->tuples;
+        while (tuple) {
+                switch (tuple->code) {
+                case 0x80:
+                        switch (tuple->data[0]) {
+                        case HNBU_CHIPID:
+                                if (tuple->size != 5)
+                                        break;
+                                vendor = tuple->data[1] | (tuple->data[2]<<8);
+                                device = tuple->data[3] | (tuple->data[4]<<8);
+                                dev_info(&func->dev, "Chip ID %04x:%04x\n",
+                                         vendor, device);
+                                break;
+                        default:
+                                break;
+                        }
+                        break;
+                default:
+                        break;
+                }
+                tuple = tuple->next;
+        }
+        if (!vendor || !device) {
+                error = -ENODEV;
+                goto out;
+        }
+
+        sdio_claim_host(func);
+        error = sdio_set_block_size(func, B43_SDIO_BLOCK_SIZE);
+        if (error) {
+                dev_err(&func->dev, "failed to set block size to %u bytes,"
+                        " error %d\n", B43_SDIO_BLOCK_SIZE, error);
+                goto err_release_host;
+        }
+        error = sdio_enable_func(func);
+        if (error) {
+                dev_err(&func->dev, "failed to enable func, error %d\n", error);
+                goto err_release_host;
+        }
+        sdio_release_host(func);
+
+        sdio = kzalloc(sizeof(*sdio), GFP_KERNEL);
+        if (!sdio) {
+                error = -ENOMEM;
+                dev_err(&func->dev, "failed to allocate ssb bus\n");
+                goto err_disable_func;
+        }
+        error = ssb_bus_sdiobus_register(&sdio->ssb, func,
+                                         b43_sdio_get_quirks(vendor, device));
+        if (error) {
+                dev_err(&func->dev, "failed to register ssb sdio bus,"
+                        " error %d\n", error);
+                goto err_free_ssb;
+        }
+        sdio_set_drvdata(func, sdio);
+
+        return 0;
+
+err_free_ssb:
+        kfree(sdio);
+err_disable_func:
+        sdio_disable_func(func);
+err_release_host:
+        sdio_release_host(func);
+out:
+        return error;
+}
+
+static void b43_sdio_remove(struct sdio_func *func)
+{
+        struct b43_sdio *sdio = sdio_get_drvdata(func);
+
+        ssb_bus_unregister(&sdio->ssb);
+        sdio_disable_func(func);
+        kfree(sdio);
+        sdio_set_drvdata(func, NULL);
+}
+
+static const struct sdio_device_id b43_sdio_ids[] = {
+        { SDIO_DEVICE(0x02d0, 0x044b) }, /* Nintendo Wii WLAN daughter card */
+        { },
+};
+
+static struct sdio_driver b43_sdio_driver = {
+        .name           = "b43-sdio",
+        .id_table       = b43_sdio_ids,
+        .probe          = b43_sdio_probe,
+        .remove         = b43_sdio_remove,
+};
+
+int b43_sdio_init(void)
+{
+        return sdio_register_driver(&b43_sdio_driver);
+}
+
+void b43_sdio_exit(void)
+{
+        sdio_unregister_driver(&b43_sdio_driver);
+}