Re: [Qemu-devel] [PATCH v5 12/15] petalogix-ml605: added SPI controller with n25q128

[Peter Maydell]

On 6 August 2012 03:16, Peter A. G. Crosthwaite
<address@hidden> wrote:
> Added SPI controller to the reference design, with two n25q128 spi-flashes
> connected.
>
> Signed-off-by: Peter A. G. Crosthwaite <address@hidden>
> ---
>  hw/petalogix_ml605_mmu.c |   28 +++++++++++++++++++++++++++-
>  1 files changed, 27 insertions(+), 1 deletions(-)
>
> diff --git a/hw/petalogix_ml605_mmu.c b/hw/petalogix_ml605_mmu.c
> index 6a7d0c0..f0ecc1f 100644
> --- a/hw/petalogix_ml605_mmu.c
> +++ b/hw/petalogix_ml605_mmu.c
> @@ -36,6 +36,7 @@
>  #include "blockdev.h"
>  #include "pc.h"
>  #include "exec-memory.h"
> +#include "ssi.h"
>
>  #include "microblaze_boot.h"
>  #include "microblaze_pic_cpu.h"
> @@ -54,6 +55,8 @@
>  #define AXIENET_BASEADDR 0x82780000
>  #define AXIDMA_BASEADDR 0x84600000
>
> +#define NUM_SPI_FLASHES 2
> +
>  static void machine_cpu_reset(MicroBlazeCPU *cpu)
>  {
>      CPUMBState *env = &cpu->env;
> @@ -78,6 +81,7 @@ petalogix_ml605_init(ram_addr_t ram_size,
>      MemoryRegion *address_space_mem = get_system_memory();
>      DeviceState *dev;
>      MicroBlazeCPU *cpu;
> +    SysBusDevice *busdev;
>      CPUMBState *env;
>      DriveInfo *dinfo;
>      int i;
> @@ -135,9 +139,31 @@ petalogix_ml605_init(ram_addr_t ram_size,
>                                       irq[1], irq[0], 100 * 1000000);
>      }
>
> +    {
> +        SSIBus *spi;
> +
> +        dev = qdev_create(NULL, "xilinx,spi");
> +        qdev_prop_set_uint8(dev, "num-cs", NUM_SPI_FLASHES);
> +        qdev_init_nofail(dev);
> +        busdev = sysbus_from_qdev(dev);
> +        sysbus_mmio_map(busdev, 0, 0x40a00000);
> +        sysbus_connect_irq(busdev, 0, irq[4]);
> +
> +        spi = (SSIBus *)qdev_get_child_bus(dev, "spi");
> +
> +        for (i = 0; i < NUM_SPI_FLASHES; i++) {
> +            qemu_irq cs_line;
> +
> +            dev = ssi_create_slave_no_init(spi, "m25p80");
> +            qdev_prop_set_string(dev, "partname", (char *)"n25q128");

Why the cast?

> +            qdev_init_nofail(dev);
> +            cs_line = qdev_get_gpio_in(dev, 0);
> +            sysbus_connect_irq(busdev, i+1, cs_line);
> +        }
> +    }
> +
>      microblaze_load_kernel(cpu, ddr_base, ram_size, BINARY_DEVICE_TREE_FILE,
>                                                              
> machine_cpu_reset);
> -
>  }
>
>  static QEMUMachine petalogix_ml605_machine = {
> --
> 1.7.0.4
>


-- PMM