Re: [Qemu-devel] [PATCH 3/4] ast2400: create SPI flash slaves

[Paolo Bonzini <pbonzini@redhat.com>]

On 17/06/2016 10:35, Cédric Le Goater wrote:
> A set of SPI flash slaves is attached under the flash controllers of
> the palmetto platform. "n25q256a" flash modules are used for the BMC
> and "mx25l25635e" for the host. These types are common in the
> OpenPower ecosystem.
> 
> The segment addresses used for the memory mappings are the defaults
> provided by the specs. They can be changed with the Segment Address
> Register but this is not supported in the current implementation.

Do you mind if we fix the /* FIXME */ comment, regarding adding a drive
property to m25p80 instead of using drive_get_next?  I'll send a patch
shortly.

Paolo

> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>  hw/arm/palmetto-bmc.c       |  3 +++
>  hw/ssi/aspeed_smc.c         | 60 ++++++++++++++++++++++++++++++++++++++++++---
>  include/hw/ssi/aspeed_smc.h | 10 ++++++++
>  3 files changed, 70 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/arm/palmetto-bmc.c b/hw/arm/palmetto-bmc.c
> index a51d960510ee..0aed97a7d9cf 100644
> --- a/hw/arm/palmetto-bmc.c
> +++ b/hw/arm/palmetto-bmc.c
> @@ -47,6 +47,9 @@ static void palmetto_bmc_init(MachineState *machine)
>      object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
>                               &error_abort);
>  
> +    aspeed_smc_init_flashes(&bmc->soc.smc, "n25q256a", &error_abort);
> +    aspeed_smc_init_flashes(&bmc->soc.spi, "mx25l25635e", &error_abort);
> +
>      palmetto_bmc_binfo.kernel_filename = machine->kernel_filename;
>      palmetto_bmc_binfo.initrd_filename = machine->initrd_filename;
>      palmetto_bmc_binfo.kernel_cmdline = machine->kernel_cmdline;
> diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
> index 6a02906c8f97..f7ef69418c0c 100644
> --- a/hw/ssi/aspeed_smc.c
> +++ b/hw/ssi/aspeed_smc.c
> @@ -98,13 +98,32 @@
>  #define R_SPI_MISC_CRTL   (0x10 / 4)
>  #define R_SPI_TIMINGS     (0x14 / 4)
>  
> +/*
> + * Default segments mappings and size for each slave
> + */
> +static const AspeedSegments aspeed_segments_legacy[] = {
> +    { 0x14000000, 32 * 1024 * 1024 },
> +};
> +
> +static const AspeedSegments aspeed_segments_fmc[] = {
> +    { 0x20000000, 64 * 1024 * 1024 },
> +    { 0x24000000, 32 * 1024 * 1024 },
> +    { 0x26000000, 32 * 1024 * 1024 },
> +    { 0x28000000, 32 * 1024 * 1024 },
> +    { 0x2A000000, 32 * 1024 * 1024 }
> +};
> +
> +static const AspeedSegments aspeed_segments_spi[] = {
> +    { 0x30000000, 64 * 1024 * 1024 },
> +};
> +
>  static const AspeedSMCController controllers[] = {
>      { "aspeed.smc.smc", R_CONF, R_CE_CTRL, R_CTRL0, R_TIMINGS,
> -      CONF_ENABLE_W0, 5 },
> +      CONF_ENABLE_W0, 5, aspeed_segments_legacy },
>      { "aspeed.smc.fmc", R_CONF, R_CE_CTRL, R_CTRL0, R_TIMINGS,
> -      CONF_ENABLE_W0, 5 },
> +      CONF_ENABLE_W0, 5, aspeed_segments_fmc },
>      { "aspeed.smc.spi", R_SPI_CONF, 0xff, R_SPI_CTRL0, R_SPI_TIMINGS,
> -      SPI_CONF_ENABLE_W0, 1 },
> +      SPI_CONF_ENABLE_W0, 1, aspeed_segments_spi },
>  };
>  
>  static bool aspeed_smc_is_ce_stop_active(AspeedSMCState *s, int cs)
> @@ -254,6 +273,8 @@ static int aspeed_smc_init(SysBusDevice *sbd)
>      memory_region_init_io(&s->mmio, OBJECT(s), &aspeed_smc_ops, s,
>                            s->ctrl->name, ASPEED_SMC_R_MAX * 4);
>      sysbus_init_mmio(sbd, &s->mmio);
> +
> +    s->flashes = g_new0(AspeedSMCFlashState *, s->num_cs);
>      return 0;
>  }
>  
> @@ -395,3 +416,36 @@ static void aspeed_smc_flash_register_types(void)
>  }
>  
>  type_init(aspeed_smc_flash_register_types)
> +
> +void aspeed_smc_init_flashes(AspeedSMCState *s, const char *flashtype,
> +                             Error **errp)
> +{
> +    int i ;
> +    char name[32];
> +
> +    for (i = 0; i < s->num_cs; ++i) {
> +        Object *obj = object_new(TYPE_ASPEED_SMC_FLASH);
> +        AspeedSMCFlashState *fl = ASPEED_SMC_FLASH(obj);
> +        qemu_irq cs_line;
> +
> +        s->flashes[i] = fl;
> +
> +        snprintf(name, sizeof(name), "%s.%d", s->ctrl->name, i);
> +
> +        fl->id = i;
> +        fl->controller = s;
> +        fl->size = s->ctrl->segments[i].size;
> +
> +        /* backing region */
> +        memory_region_init_io(&fl->mmio, obj, &aspeed_smc_flash_ops, fl, name,
> +                              fl->size);
> +        sysbus_init_mmio(SYS_BUS_DEVICE(fl), &fl->mmio);
> +
> +        /* SPI Flash module */
> +        fl->flash = ssi_create_slave(s->spi, flashtype);
> +        cs_line = qdev_get_gpio_in_named(fl->flash, SSI_GPIO_CS, 0);
> +        sysbus_connect_irq(SYS_BUS_DEVICE(s), i + 1, cs_line);
> +
> +        sysbus_mmio_map(SYS_BUS_DEVICE(fl), 0, s->ctrl->segments[i].addr);
> +    }
> +}
> diff --git a/include/hw/ssi/aspeed_smc.h b/include/hw/ssi/aspeed_smc.h
> index abd0005b01c2..2636c775c90f 100644
> --- a/include/hw/ssi/aspeed_smc.h
> +++ b/include/hw/ssi/aspeed_smc.h
> @@ -43,6 +43,11 @@ typedef struct AspeedSMCFlashState {
>  #define ASPEED_SMC_FLASH(obj) \
>      OBJECT_CHECK(AspeedSMCFlashState, (obj), TYPE_ASPEED_SMC_FLASH)
>  
> +typedef struct AspeedSegments {
> +    hwaddr addr;
> +    uint32_t size;
> +} AspeedSegments;
> +
>  typedef struct AspeedSMCController {
>      const char *name;
>      uint8_t r_conf;
> @@ -51,6 +56,7 @@ typedef struct AspeedSMCController {
>      uint8_t r_timings;
>      uint8_t conf_enable_w0;
>      uint8_t max_slaves;
> +    const AspeedSegments *segments;
>  } AspeedSMCController;
>  
>  #define TYPE_ASPEED_SMC "aspeed.smc"
> @@ -90,6 +96,10 @@ typedef struct AspeedSMCState {
>      uint8_t r_ctrl0;
>      uint8_t r_timings;
>      uint8_t conf_enable_w0;
> +
> +    AspeedSMCFlashState **flashes;
>  } AspeedSMCState;
>  
> +extern void aspeed_smc_init_flashes(AspeedSMCState *s, const char *flashtype,
> +                                    Error **errp);
>  #endif /* ASPEED_SMC_H */
>