Всем привет, пытаюсь из своего модуля заставить работать spi интерфейс для взаимодействия с устройством на шине с cs0. И при попытке обмена получаю дамп. Но дамп вываливается не всегда. Иногда обмен проходит.
Как я инициализирую устройство. Добавил описание в DTS (соответсвенно скомпилировал и указал при загрузке)
&spi1 {
num-cs = <1>;
cs-gpios = <&gpioa 25 0>;
status = "okay";
mptiospi: spi@0{
compatible = "epm3128";
spi-max-frequency = <100000>;
reg=<0>;
};
};
После загрузки устройство успешно отображается на sys_fs
# ls /sys/class/spi_master/spi1/
device power statistics uevent
of_node spi1.0 subsystem
...
static struct spi_device * epm3128_spi_dev;
extern struct bus_type spi_bus_type;
...
void
my_spi_init(void)
{
struct spi_master *spi_1;
struct spi_message m;
struct spi_transfer xfer = {
.tx_buf = &spi_tx_buf,
.rx_buf = &spi_rx_buf,
.len = 2,
.bits_per_word = 16,
};
spi_1 = spi_busnum_to_master(1);
epm3128_spi_dev = bus_find_device_by_name(&spi_bus_type,spi_1,"spi1.0");
if(epm3128_spi_dev) {
spi_tx_buf = 0xaaaa;
spi_rx_buf = 0;
spi_setup(epm3128_spi_dev);
spi_message_init_with_transfers(&m,&xfer,1);
spi_async(epm3128_spi_dev,&m);
}
}
Есть идеи, что я мог упустить?
# [ 44.065615] mmc0: Timeout waiting for hardware interrupt.
[ 44.073009] ------------[ cуt here ]------------
[ 44.077633] WARNING: CPU: 1 PID: 0 at drivers/mmc/host/sdhci.c:1026 sdhci_send_command+0x788/0xb70()
[ 44.086750] Modules linked in: mpt_sys_driver(O)
[ 44.091390] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G O 4.4.111.8 #1
[ 44.098774] Hardware name: ELVEES MCom-02 (Flattened Device Tree)
[ 44.104856] Backtrace:
[ 44.107330] [<c0013a40>] (dump_backtrace) from [<c0013c5c>] (show_stack+0x18/0x1c)
[ 44.114886] r7:c03d920c r6:600b0193 r5:00000000 r4:c0724ca4
[ 44.120594] [<c0013c44>] (show_stack) from [<c024456c>] (dump_stack+0x90/0xa4)
[ 44.127819] [<c02444dc>] (dump_stack) from [<c0023f98>] (warn_slowpath_common+0x88/0xb8)
[ 44.135894] r7:c03d920c r6:00000402 r5:00000009 r4:00000000
[ 44.141600] [<c0023f10>] (warn_slowpath_common) from [<c002406c>] (warn_slowpath_null+0x24/0x2c)
[ 44.150369] r8:eebd03a0 r7:c03da144 r6:ee68dcc4 r5:ee5d5b00 r4:ee5d5b00
[ 44.157122] [<c0024048>] (warn_slowpath_null) from [<c03d920c>] (sdhci_send_command+0x788/0xb70)
[ 44.165898] [<c03d8a84>] (sdhci_send_command) from [<c03d9d80>] (sdhci_finish_data+0xdc/0x354)
[ 44.174493] r10:eebd0380 r9:2e4c2000 r8:eebd03a0 r7:c03da144 r6:600b0113 r5:ee68dcf8
[ 44.182369] r4:ee5d5b00
[ 44.184914] [<c03d9ca4>] (sdhci_finish_data) from [<c03da1bc>] (sdhci_timeout_timer+0x78/0xbc)
[ 44.193509] r10:eebd0380 r9:2e4c2000 r8:eebd03a0 r7:c03da144 r6:600b0113 r5:ee5d5c40
[ 44.201383] r4:ee5d5b00
[ 44.203937] [<c03da144>] (sdhci_timeout_timer) from [<c0073980>] (call_timer_fn.constprop.4+0x30/0x9c)
[ 44.213225] r7:c03da144 r6:00000100 r5:00000200 r4:ffffe000
[ 44.218928] [<c0073950>] (call_timer_fn.constprop.4) from [<c0073b88>] (run_timer_softirq+0x19c/0x214)
[ 44.228217] r7:c0716100 r6:c070e380 r5:00000200 r4:00000000
[ 44.233921] [<c00739ec>] (run_timer_softirq) from [<c0027c74>] (__do_softirq+0xfc/0x258)
[ 44.241996] r10:00000100 r9:c0716084 r8:c0716080 r7:00000001 r6:ffffe000 r5:40000001
[ 44.249872] r4:00000020
[ 44.252416] [<c0027b78>] (__do_softirq) from [<c002806c>] (irq_exit+0x80/0xb8)
[ 44.259625] r10:c064243c r9:f0803100 r8:ee408000 r7:00000001 r6:00000000 r5:00000000
[ 44.267500] r4:c070f2d4
[ 44.270046] [<c0027fec>] (irq_exit) from [<c0063cd8>] (__handle_domain_irq+0x68/0xbc)
[ 44.277862] r5:00000000 r4:c070f2d4
[ 44.281460] [<c0063c70>] (__handle_domain_irq) from [<c0009450>] (gic_handle_irq+0x50/0x94)
[ 44.289796] r9:f0803100 r8:ee483f58 r7:f0802100 r6:f080210c r5:c0724e00 r4:c0716760
[ 44.297589] [<c0009400>] (gic_handle_irq) from [<c0014694>] (__irq_svc+0x54/0x70)
[ 44.305060] Exception stack(0xee483f58 to 0xee483fa0)
[ 44.310105] 3f40: 00000000 00012090
[ 44.318274] 3f60: eebd0340 c001fba0 ffffe000 c07164e8 c071649c c070e320 c05406f8 c073f4ad
[ 44.326443] 3f80: c064243c ee483fb4 ee483fb8 ee483fa8 c00107a0 c00107a4 600b0013 ffffffff
[ 44.334605] r9:c073f4ad r8:c05406f8 r7:ee483f8c r6:ffffffff r5:600b0013 r4:c00107a4
[ 44.342406] [<c0010764>] (arch_cpu_idle) from [<c005ad7c>] (default_idle_call+0x28/0x34)
[ 44.350488] [<c005ad54>] (default_idle_call) from [<c005ae00>] (cpu_startup_entry+0x78/0x18c)
[ 44.359005] [<c005ad88>] (cpu_startup_entry) from [<c0015ba0>] (secondary_start_kernel+0x14c/0x158)
[ 44.368034] r7:c0742260 r4:c071f4c8
[ 44.371630] [<c0015a54>] (secondary_start_kernel) from [<4000952c>] (0x4000952c)
[ 44.379013] r5:00000051 r4:6e46c06a
[ 44.382605] ---[ end trace 1fb70ea29a4ea63d ]---
[ 51.755607] INFO: rcu_sched self-detected stall on CPU
[ 51.760759] 0-...: (1 GPs behind) idle=24d/140000000000002/0 softirq=1012/1014 fqs=2065
[ 51.768921] (t=2100 jiffies g=169 c=168 q=49)
[ 51.773457] Task dump for CPU 0:
[ 51.776680] spi1 R running 0 54 2 0x00000002
[ 51.783045] Backtrace:
[ 51.785511] [<c0013a40>] (dump_backtrace) from [<c0013c5c>] (show_stack+0x18/0x1c)
[ 51.793068] r7:00000140 r6:c0716518 r5:00000000 r4:ee61dc80
[ 51.798779] [<c0013c44>] (show_stack) from [<c00495e4>] (sched_show_task+0xac/0xfc)
[ 51.806429] [<c0049538>] (sched_show_task) from [<c004b4fc>] (dump_cpu_task+0x40/0x44)
[ 51.814331] r5:00000000 r4:00000000
[ 51.817931] [<c004b4bc>] (dump_cpu_task) from [<c006d7bc>] (rcu_dump_cpu_stacks+0xb4/0xc0)
[ 51.826180] r5:00000000 r4:c071d380
[ 51.829780] [<c006d708>] (rcu_dump_cpu_stacks) from [<c00715ec>] (rcu_check_callbacks+0x3d0/0x788)
[ 51.838722] r9:c0716518 r8:c071d380 r7:c071d380 r6:2e4b6000 r5:c0712080 r4:eebc8080
[ 51.846519] [<c007121c>] (rcu_check_callbacks) from [<c0073c44>] (update_process_times+0x44/0x6c)
[ 51.855375] r10:000186a0 r9:0000000c r8:0b592880 r7:ee411280 r6:00000000 r5:ee61dc80
[ 51.863251] r4:ffffe000
[ 51.865805] [<c0073c00>] (update_process_times) from [<c0081370>] (tick_periodic+0x44/0xbc)
[ 51.874141] r7:ee411280 r6:c0716140 r5:00000000 r4:00989680
[ 51.879846] [<c008132c>] (tick_periodic) from [<c0081560>] (tick_handle_periodic+0x30/0x90)
[ 51.888182] r9:00000000 r8:00000010 r7:ee411280 r6:eebca5c0 r5:7fffffff r4:ffffffff
[ 51.895980] [<c0081530>] (tick_handle_periodic) from [<c0016940>] (twd_handler+0x38/0x48)
[ 51.904142] r9:f0803100 r8:00000010 r7:ee411280 r6:c0724e04 r5:ee405c00 r4:00000001
[ 51.911940] [<c0016908>] (twd_handler) from [<c0067f2c>] (handle_percpu_devid_irq+0x78/0x90)
[ 51.920362] r5:ee405c00 r4:eebca5c0
[ 51.923961] [<c0067eb4>] (handle_percpu_devid_irq) from [<c0063a04>] (generic_handle_irq+0x2c/0x3c)
[ 51.932989] r9:f0803100 r8:ee408000 r7:00000001 r6:ee695e18 r5:00000000 r4:c070f2d4
[ 51.940784] [<c00639d8>] (generic_handle_irq) from [<c0063cd4>] (__handle_domain_irq+0x64/0xbc)
[ 51.949472] [<c0063c70>] (__handle_domain_irq) from [<c0009450>] (gic_handle_irq+0x50/0x94)
[ 51.957808] r9:f0803100 r8:ee695d00 r7:f0802100 r6:f080210c r5:c0724e00 r4:c0716760
[ 51.965601] [<c0009400>] (gic_handle_irq) from [<c0014694>] (__irq_svc+0x54/0x70)
[ 51.973071] Exception stack(0xee695d00 to 0xee695d48)
[ 51.978120] 5d00: c0742a40 c0742a40 00000000 00000000 00000082 00000000 ffffe000 00000001
[ 51.986289] 5d20: ee408000 f0803100 000186a0 ee695dac 00208040 ee695d50 c002806c c0027c18
[ 51.994453] 5d40: 600d0113 ffffffff
[ 51.997935] r9:f0803100 r8:ee408000 r7:ee695d34 r6:ffffffff r5:600d0113 r4:c0027c18
[ 52.005729] [<c0027b78>] (__do_softirq) from [<c002806c>] (irq_exit+0x80/0xb8)
[ 52.012939] r10:000186a0 r9:f0803100 r8:ee408000 r7:00000001 r6:00000000 r5:00000000
[ 52.020815] r4:c070f2d4
[ 52.023360] [<c0027fec>] (irq_exit) from [<c0063cd8>] (__handle_domain_irq+0x68/0xbc)
[ 52.031176] r5:00000000 r4:c070f2d4
[ 52.034773] [<c0063c70>] (__handle_domain_irq) from [<c0009450>] (gic_handle_irq+0x50/0x94)
[ 52.043109] r9:f0803100 r8:ee695e18 r7:f0802100 r6:f080210c r5:c0724e00 r4:c0716760
[ 52.050903] [<c0009400>] (gic_handle_irq) from [<c0014694>] (__irq_svc+0x54/0x70)
[ 52.058373] Exception stack(0xee695e18 to 0xee695e60)
[ 52.063417] 5e00: 00000001 00000002
[ 52.071585] 5e20: 00000001 00000000 ee5f60d0 00000080 ee6830c0 f099202c ee68c400 f0992000
[ 52.079753] 5e40: 000186a0 ee695e94 ee695e98 ee695e68 c0317a58 c0317a1c 600d0013 ffffffff
[ 52.087915] r9:f0992000 r8:ee68c400 r7:ee695e4c r6:ffffffff r5:600d0013 r4:c0317a1c
[ 52.095713] [<c0317808>] (dw_spi_transfer_one) from [<c03169c0>] (spi_transfer_one_message+0xfc/0x36c)
[ 52.105001] r10:c0724c8c r9:ee600e40 r8:ee68c5b0 r7:ed87fd1c r6:ee600c00 r5:ed87fd4c
[ 52.112877] r4:ee600c00 r3:c0317808
[ 52.116475] [<c03168c4>] (spi_transfer_one_message) from [<c0316fa0>] (__spi_pump_messages+0x370/0x4c8)
[ 52.125851] r10:00000000 r9:00000000 r8:00000000 r7:00000001 r6:ed87fd1c r5:ee600dec
[ 52.133728] r4:ee600c00
[ 52.136273] [<c0316c30>] (__spi_pump_messages) from [<c0317110>] (spi_pump_messages+0x18/0x1c)
[ 52.144869] r10:00000000 r9:00000000 r8:00000000 r7:00000001 r6:c0786a44 r5:ffffe000
[ 52.152744] r4:ee600dc4
[ 52.155292] [<c03170f8>] (spi_pump_messages) from [<c003fdb4>] (kthread_worker_fn+0xdc/0x1a0)
[ 52.163806] [<c003fcd8>] (kthread_worker_fn) from [<c004000c>] (kthread+0x110/0x118)
[ 52.171535] r9:00000000 r8:c003fcd8 r7:ee600dc4 r6:ee694000 r5:ee5fa3c0 r4:00000000
[ 52.179331] [<c003fefc>] (kthread) from [<c000fd30>] (ret_from_fork+0x14/0x24)
[ 52.186540] r8:00000000 r7:00000000 r6:00000000 r5:c003fefc r4:ee5fa3c0
