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器件型号：CC3301 您好！
我们在代码中处理对 CC3301的 PG2和 PG1版本的支持、并放置了备用机制、以便在 PG2未正确加载时使用 PG1驱动程序。
我们的主要问题是`rmmod cc33xx && rmmod cc33xx_sDIO`在插入失败后不起作用，如下所示：
# modprobe cc33xx # modprobe cc33xx_sdio [ 405.109329] cc33xx_sdio mmc2:0001:2: Using GPIO as IRQ [ 405.120114] cc33xx_driver cc33xx.1.auto: Direct firmware load for ti-connectivity/cc33xx-nvs.bin failed with error -2 [ 407.644714] cc33xx_driver cc33xx.1.auto: Direct firmware load for ti-connectivity/static_calibration.bin failed with error -2 [ 407.656104] wlcore: WARNING Could not get firmware ti-connectivity/static_calibration.bin: -2, proceeding with no calibration [ 407.667531] wlcore: ERROR FW is stuck, triggering recovery [ 409.686627] wlcore: WARNING CONFIGURE command NOK [ 409.691430] wlcore: WARNING acx command sending failed: -5 [ 409.697974] wlcore: ERROR FW download failed # rmmod cc33xx # rmmod cc33xx_sdio [ 790.539493] Unable to handle kernel paging request at virtual address ffff800000f3e7c0 [ 790.547478] Mem abort info: [ 790.550312] ESR = 0x0000000086000007 [ 790.554102] EC = 0x21: IABT (current EL), IL = 32 bits [ 790.559469] SET = 0, FnV = 0 [ 790.562544] EA = 0, S1PTW = 0 [ 790.565675] FSC = 0x07: level 3 translation fault [ 790.570551] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000082143000 [ 790.577263] [ffff800000f3e7c0] pgd=10000000b7fff003, p4d=10000000b7fff003, pud=10000000b7ffe003, pmd=1000000086d06003, pte=0000000000000000 [ 790.589793] Internal error: Oops: 0000000086000007 [#1] PREEMPT SMP [ 790.596051] Modules linked in: cc33xx_sdio(-) mac80211 libarc4 ppp_async crc_ccitt ppp_generic slhc can_isotp can_raw can cfg80211 rfkill cdc_acm xhci_plat_hcd iptable_filter ip_tables xt_tcpudp dwc3 xt_conntrack nf_conntrack l] [ 790.631700] CPU: 1 PID: 5712 Comm: irq/320-cc33xx Not tainted 6.1.46-g1d4b5da681 #1 [ 790.639342] Hardware name: Generac CES Penguin2 (DT) [ 790.644293] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 790.651240] pc : 0xffff800000f3e7c0 [ 790.654730] lr : gpio_irq_thread_handler+0x24/0x3c [cc33xx_sdio] [ 790.660733] sp : ffff800009c3bdb0 [ 790.664036] x29: ffff800009c3bdb0 x28: 0000000000000000 x27: 0000000000000000 [ 790.671160] x26: ffff8000080b7a80 x25: ffff8000080b79d0 x24: ffff00000a621000 [ 790.678283] x23: ffff000002d7f000 x22: 0000000000000001 x21: ffff000002b23900 [ 790.685407] x20: ffff000002d7f000 x19: ffff00000a621000 x18: 0000000000000000 [ 790.692530] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [ 790.699652] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 [ 790.706775] x11: 0000000000000004 x10: 00000000000009b0 x9 : ffff800009c3bd50 [ 790.713899] x8 : ffff000002b24310 x7 : ffff000037dac2c0 x6 : 0000000000000000 [ 790.721022] x5 : 00000000410fd030 x4 : 0000000000000000 x3 : 0000000000000010 [ 790.728145] x2 : ffff800000f7d694 x1 : ffff800000f3e7c0 x0 : ffff000006cd7c00 [ 790.735269] Call trace: [ 790.737706] 0xffff800000f3e7c0 [ 790.740841] irq_thread_fn+0x2c/0xb0 [ 790.744415] irq_thread+0x16c/0x254 [ 790.747895] kthread+0x10c/0x110 [ 790.751118] ret_from_fork+0x10/0x20 [ 790.754694] Code: bad PC value [ 790.757744] ---[ end trace 0000000000000000 ]--- [ 790.762351] Kernel panic - not syncing: Oops: Fatal exception [ 790.768082] SMP: stopping secondary CPUs [ 790.771998] Kernel Offset: disabled [ 790.775474] CPU features: 0x00000,00800084,0000420b [ 790.780339] Memory Limit: none [ 790.783386] Rebooting in 3 seconds..
调查后、boot.c：cc33xx_init_fw (cc33xx.ko 的一部分)中的驱动程序代码似乎没有正确禁用 IRQ、以防出现校准数据错误：
ret = wait_for_boot_irq(wl, HINT_FW_INIT_COMPLETE , CC33XX_BOOT_TIMEOUT); if (ret < 0) goto disable_irq; /* Get static calibration data and send it to FW*/ ret = download_static_calibration_data(wl); if (ret < 0) return ret; ret = cc33xx_hw_init(wl); if (ret < 0) goto disable_irq;
在该错误情况下 IRQ 未正确禁用的情况下、cc33xx_sDIO 驱动程序无法正确卸载、因为 cc33xx_sDIO 中的 IRQ 处理代码似乎会在指向 cc33xx 模块中的一个函数时执行、该函数已被卸载。
使用
/* Get static calibration data and send it to FW*/ ret = download_static_calibration_data(wl); if (ret < 0) goto disable_irq;
解决卸载问题。
