diff options
Diffstat (limited to 'package/kernel/broadcom-wl/src/glue/wl_glue.c')
| -rw-r--r-- | package/kernel/broadcom-wl/src/glue/wl_glue.c | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/package/kernel/broadcom-wl/src/glue/wl_glue.c b/package/kernel/broadcom-wl/src/glue/wl_glue.c new file mode 100644 index 0000000..64f8486 --- /dev/null +++ b/package/kernel/broadcom-wl/src/glue/wl_glue.c @@ -0,0 +1,315 @@ +/* + * wl_glue.c: Broadcom WL support module providing a unified SSB/BCMA handling. + * Copyright (C) 2011 Jo-Philipp Wich <jow@openwrt.org> + */ + +#include "wl_glue.h" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> + +#ifdef CONFIG_BCM47XX +#include <bcm47xx.h> +#endif + +#ifdef CONFIG_SSB +#include <linux/ssb/ssb.h> +#endif + +#ifdef CONFIG_BCMA +#include <linux/bcma/bcma.h> +#endif + +MODULE_AUTHOR("Jo-Philipp Wich (jow@openwrt.org)"); +MODULE_DESCRIPTION("Broadcom WL SSB/BCMA compatibility layer"); +MODULE_LICENSE("GPL"); + +static wl_glue_attach_cb_t attach_cb = NULL; +static wl_glue_remove_cb_t remove_cb = NULL; +static enum wl_glue_bus_type active_bus_type = WL_GLUE_BUS_TYPE_UNSPEC; +static int wl_glue_attached = 0; + + +#ifdef CONFIG_SSB +static int wl_glue_ssb_probe(struct ssb_device *dev, const struct ssb_device_id *id) +{ + void *mmio; + void *wldev; + + if (!attach_cb) + { + pr_err("No attach callback registered\n"); + return -ENOSYS; + } + + if (dev->bus->bustype != SSB_BUSTYPE_SSB) + { + pr_err("Attaching to SSB behind PCI is not supported. Please remove the b43 ssb bridge\n"); + return -EINVAL; + } + + mmio = (void *) 0x18000000 + dev->core_index * 0x1000; + wldev = attach_cb(id->vendor, id->coreid, (ulong)mmio, dev, dev->irq); + + if (!wldev) + { + pr_err("The attach callback failed, SSB probe aborted\n"); + return -ENODEV; + } + + ssb_set_drvdata(dev, wldev); + return 0; +} + +static void wl_glue_ssb_remove(struct ssb_device *dev) +{ + void *wldev = ssb_get_drvdata(dev); + + if (remove_cb) + remove_cb(wldev); + + ssb_set_drvdata(dev, NULL); +} + +static const struct ssb_device_id wl_glue_ssb_tbl[] = { + SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, SSB_ANY_REV), + {}, +}; + +static struct ssb_driver wl_glue_ssb_driver = { + .name = KBUILD_MODNAME, + .id_table = wl_glue_ssb_tbl, + .probe = wl_glue_ssb_probe, + .remove = wl_glue_ssb_remove, +}; +#endif /* CONFIG_SSB */ + +#ifdef CONFIG_BCMA +static int wl_glue_bcma_probe(struct bcma_device *dev) +{ + void *wldev; + + if (!attach_cb) + { + pr_err("No attach callback registered\n"); + return -ENOSYS; + } + + if (dev->bus->hosttype != BCMA_HOSTTYPE_SOC) + { + pr_err("Unsupported BCMA bus type %d\n", dev->bus->hosttype); + return -EINVAL; + } + + /* + * NB: + * 0x18000000 = BCMA_ADDR_BASE + * 0x1000 = BCMA_CORE_SIZE + */ + + wldev = attach_cb(dev->id.manuf, dev->id.id, (ulong)dev->addr, dev, dev->irq); + + if (!wldev) + { + pr_err("The attach callback failed, BCMA probe aborted\n"); + return -ENODEV; + } + + bcma_set_drvdata(dev, wldev); + return 0; +} + +static void wl_glue_bcma_remove(struct bcma_device *dev) +{ + void *wldev = bcma_get_drvdata(dev); + + if (remove_cb) + remove_cb(wldev); + + bcma_set_drvdata(dev, NULL); +} + +static const struct bcma_device_id wl_glue_bcma_tbl[] = { + BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, BCMA_ANY_REV, BCMA_ANY_CLASS), + {}, +}; + +static struct bcma_driver wl_glue_bcma_driver = { + .name = KBUILD_MODNAME, + .id_table = wl_glue_bcma_tbl, + .probe = wl_glue_bcma_probe, + .remove = wl_glue_bcma_remove, +}; +#endif /* CONFIG_BCMA */ + + +void wl_glue_set_attach_callback(wl_glue_attach_cb_t cb) +{ + attach_cb = cb; +} +EXPORT_SYMBOL(wl_glue_set_attach_callback); + +void wl_glue_set_remove_callback(wl_glue_remove_cb_t cb) +{ + remove_cb = cb; +} +EXPORT_SYMBOL(wl_glue_set_remove_callback); + +int wl_glue_register(void) +{ + int err; + + switch(active_bus_type) + { +#ifdef CONFIG_SSB + case WL_GLUE_BUS_TYPE_SSB: + err = ssb_driver_register(&wl_glue_ssb_driver); + break; +#endif /* CONFIG_SSB */ + +#ifdef CONFIG_BCMA + case WL_GLUE_BUS_TYPE_BCMA: + err = bcma_driver_register(&wl_glue_bcma_driver); + break; +#endif /* CONFIG_BCMA */ + + default: + pr_err("Not attaching through glue driver due to unsupported bus\n"); + err = -ENOSYS; + break; + } + + if (!err) + { + pr_info("SSB/BCMA glue driver successfully attached\n"); + wl_glue_attached = 1; + } + + return err; +} +EXPORT_SYMBOL(wl_glue_register); + +int wl_glue_unregister(void) +{ + int err; + + if (!wl_glue_attached) + return -ENOSYS; + + switch (active_bus_type) + { +#ifdef CONFIG_SSB + case WL_GLUE_BUS_TYPE_SSB: + ssb_driver_unregister(&wl_glue_ssb_driver); + err = 0; + break; +#endif /* CONFIG_SSB */ + +#ifdef CONFIG_BCMA + case WL_GLUE_BUS_TYPE_BCMA: + bcma_driver_unregister(&wl_glue_bcma_driver); + err = 0; + break; +#endif /* CONFIG_BCMA */ + + default: + pr_err("Not removing glue driver due to unsupported bus\n"); + err = -ENOSYS; + break; + } + + if (!err) + { + pr_info("SSB/BCMA glue driver successfully detached\n"); + wl_glue_attached = 0; + } + + return err; +} +EXPORT_SYMBOL(wl_glue_unregister); + +struct device * wl_glue_get_dmadev(void *dev) +{ + struct device *dma_dev; + + switch (active_bus_type) + { +#ifdef CONFIG_SSB + case WL_GLUE_BUS_TYPE_SSB: + dma_dev = ((struct ssb_device *)dev)->dma_dev; + break; +#endif /* CONFIG_SSB */ + +#ifdef CONFIG_BCMA + case WL_GLUE_BUS_TYPE_BCMA: + dma_dev = ((struct bcma_device *)dev)->dma_dev; + break; +#endif /* CONFIG_BCMA */ + + default: + BUG(); + dma_dev = NULL; + break; + } + + return dma_dev; +} +EXPORT_SYMBOL(wl_glue_get_dmadev); + + +static int __init wl_glue_init(void) +{ +#ifdef CONFIG_BCM47XX + /* + * BCM47xx currently supports either SSB or BCMA bus, + * determine the used one from the info set by the + * platform setup code. + */ + switch (bcm47xx_bus_type) + { +#ifdef CONFIG_BCM47XX_SSB + case BCM47XX_BUS_TYPE_SSB: + active_bus_type = WL_GLUE_BUS_TYPE_SSB; + break; +#endif /* CONFIG_BCM47XX_SSB */ + +#ifdef CONFIG_BCM47XX_BCMA + case BCM47XX_BUS_TYPE_BCMA: + active_bus_type = WL_GLUE_BUS_TYPE_BCMA; + break; +#endif /* CONFIG_BCM47XX_BCMA */ + } +#endif /* CONFIG_BCM47XX */ + +#ifdef CONFIG_BCM63XX +#ifdef CONFIG_SSB + /* + * BCM63xx currently only uses SSB, so assume that. + */ + active_bus_type = WL_GLUE_BUS_TYPE_SSB; +#endif /* CONFIG_SSB */ +#endif /* CONFIG_BCM63XX */ + + /* do not fail here, let wl_glue_register() return -ENOSYS later */ + if (active_bus_type == WL_GLUE_BUS_TYPE_UNSPEC) + pr_err("Unable to determine used system bus type\n"); + + return 0; +} + +static void __exit wl_glue_exit(void) +{ + if (wl_glue_attached) + { + if (wl_glue_unregister()) + pr_err("Failed to unregister glue driver\n"); + + wl_glue_attached = 0; + } + + return; +} + +module_init(wl_glue_init); +module_exit(wl_glue_exit); |