platform_device_register设备注册问题

只看该作者 · 2015-6-11 16:55

platform_device_register()单独注册设备（serial8250）没问题，内核能成功启动。如果编译进相对应的驱动，内核起不来Uncompressing Linux... done, booting the kernel.再无相应，单独注掉platform_device_register()，即不注册设备，同样把该驱动（serial8250）编进内核是可以启动的。。换句话说，单独都能存在，不能同时注册进内核，可能会是哪里冲突呢？求各路大神指点指点，

只看该作者 · 2015-6-12 08:31

最好能贴出代码来，让别人看看，才能找问题......光看描述很难定位原因......

只看该作者 · 2015-6-12 09:09

本帖最后由 15228876176 于 2015-6-12 09:10 编辑

static struct gpmc_timings ext_uart_timings = {
      /*Minumum clock period for synchronous mode (in picoseconds)*/
      .sync_clk = 0,
      /*CS signal timing corresponding to GPMC_CONFIG2*/
      .cs_on = 10,       //T6S
      .cs_rd_off = 80,       //oe_off + T7H
      .cs_wr_off = 60,       //tcs for write: we_off + t13h
//       .adv_on = 6,
//       .adv_rd_off = 34,
//       .adv_wr_off = 44,
      .we_on = 20,
      .we_off = 60,

      .oe_on = 20,
      .oe_off = 70,

      .access = 60,
      .rd_cycle = 110,
      .wr_cycle = 90,

      .wr_access = 40,
      .wr_data_mux_bus = 0,
};
static struct plat_serial8250_port tq3359_ext_uart_data[] ={
      {
            .mapbase       = -1,
            .irq             = -1,
            .uartclk       = 1843200,
            .iotype             = UPIO_MEM,
            .regshift       = 0,
            .flags             = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .irqflags       = IRQF_TRIGGER_HIGH,
      },
      {
            .mapbase       = -1,
            .irq             = -1,
            .uartclk       = 1843200,
            .iotype             = UPIO_MEM,
            .regshift       = 0,
            .flags             = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .irqflags       = IRQF_TRIGGER_HIGH,
      },
      {
            .mapbase       = -1,
            .irq             = -1,
            .uartclk       = 1843200,
            .iotype             = UPIO_MEM,
            .regshift       = 0,
            .flags             = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .irqflags       = IRQF_TRIGGER_HIGH,
      },
      {
            .mapbase       = -1,
            .irq             = -1,
            .uartclk       = 1843200,
            .iotype             = UPIO_MEM,
            .regshift       = 0,
            .flags             = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .irqflags       = IRQF_TRIGGER_HIGH,
      },

};

static struct platform_device tq3359_ext_uart_device = {
      .name       = "serial8250",
      .id             = 0,
      .dev       = {
            .platform_data       =       tq3359_ext_uart_data,
      },
};

void gpmc_extuart_init(void)
{
      unsigned long csn1;
      unsigned long serial_gpmc_mem_base_phys = 0;

      gpmc_cs_write_reg(2,GPMC_CS_CONFIG1,0x82000200);
      gpmc_cs_write_reg(2,GPMC_CS_CONFIG2,0x00060801);
      gpmc_cs_write_reg(2,GPMC_CS_CONFIG3,0x22000010);
      gpmc_cs_write_reg(2,GPMC_CS_CONFIG4,0x06026712);
      gpmc_cs_write_reg(2,GPMC_CS_CONFIG5,0x00060906);
      gpmc_cs_write_reg(2,GPMC_CS_CONFIG6,0x84000000);
//       gpmc_cs_write_reg(2,GPMC_CS_CONFIG7,0x00000043);

   gpmc_cs_request(2,SZ_16M,&serial_gpmc_mem_base_phys);

      tq3359_ext_uart_data[0].mapbase             = serial_gpmc_mem_base_phys;
      tq3359_ext_uart_data[0].irq                      = gpio_to_irq(GPIO_TO_PIN(2,21));

      tq3359_ext_uart_data[1].mapbase             = serial_gpmc_mem_base_phys + 0x08;
      tq3359_ext_uart_data[1].irq                      = gpio_to_irq(GPIO_TO_PIN(2,21));

      tq3359_ext_uart_data[2].mapbase             = serial_gpmc_mem_base_phys + 0x10;
      tq3359_ext_uart_data[2].irq                      = gpio_to_irq(GPIO_TO_PIN(2,21));

      tq3359_ext_uart_data[3].mapbase             = serial_gpmc_mem_base_phys + 0x18;
      tq3359_ext_uart_data[3].irq                      = gpio_to_irq(GPIO_TO_PIN(2,21));

      if(platform_device_register(&tq3359_ext_uart_device)<0)
      {
            printk(KERN_INFO "Unable to register ST16c554 device\n");
            goto out_free_cs;
      }
      return 0;
out_free_cs:
      gpmc_cs_free(2);
      return -1;
//       omap_init_gpmc(gpmc_device, sizeof(gpmc_device));
//       omap_init_elm();
}

只看该作者 · 2015-6-12 23:08

编译成模块注册设备启动内核后加载模块出现如下错误，

root@SBC8600:/mnt/my# insmod 8250.ko
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
Internal error: Oops - bad syscall: 913310 [#1]
Modules linked in: 8250(+)
CPU: 0 Not tainted  (3.2.0 #82)
PC is at 0xdf06e59c
LR is at 0xafc8
pc : [<df06e59c>] lr : [<0000afc8>] psr: 80000013
sp : bef41654  ip : df00bb38  fp : df00bb94
r10: 00000000  r9 : fffffffe  r8 : 00000002
r7 : bf004154  r6 : 000000d8  r5 : bf004154  r4 : 00000000
r3 : 00000000  r2 : 00000000  r1 : 00000004  r0 : bf004154
Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 10c5387d  Table: 9cb0c019  DAC: 00000015
Process insmod (pid: 2066, stack limit = 0xdf00a2f0)
Stack: (0xbef41654 to 0xdf00c000)
1640:                                           ???????? ???????? ????????
1660: ???????? ???????? ???????? ???????? ???????? ???????? ???????? ????????
1680: ???????? ???????? ???????? ???????? ???????? ???????? ???????? ????????
16a0: ???????? ???????? ???????? ???????? ???????? ???????? ???????? ????????

反汇编了= = 不知道怎么定位这个错误啊？望指点

platform_device_register设备注册问题

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