[PATCH qemu 03/12] ast2400: create SPI flash slaves

[Andrew Jeffery]

On Sun, 2016-05-29 at 23:19 +0200, Cédric Le Goater wrote:
> This patch creates a number of SPI flash slaves of the same type under
> the SMC/FMC and under the SMC/SPI controllers. We use a "n25q256a"
> flash module type for the BMC and a "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.
> 
> Signed-off-by: Cédric Le Goater <clg at kaod.org>

Reviewed-by: Andrew Jeffery <andrew at aj.id.au>

> ---
>  hw/arm/palmetto-bmc.c       |  3 +++
>  hw/ssi/aspeed_smc.c         | 62 +++++++++++++++++++++++++++++++++++++++++++++
>  include/hw/ssi/aspeed_smc.h |  3 +++
>  3 files changed, 68 insertions(+)
> 
> diff --git a/hw/arm/palmetto-bmc.c b/hw/arm/palmetto-bmc.c
> index 6367f978bc7b..c4099987d354 100644
> --- a/hw/arm/palmetto-bmc.c
> +++ b/hw/arm/palmetto-bmc.c
> @@ -50,6 +50,9 @@ 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");
> +    aspeed_smc_init_flashes(&bmc->soc.spi, "mx25l25635e");
> +
>      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 43743628ba0c..4175356141e7 100644
> --- a/hw/ssi/aspeed_smc.c
> +++ b/hw/ssi/aspeed_smc.c
> @@ -215,6 +215,8 @@ static int aspeed_smc_init(SysBusDevice *sbd)
>                            name, ASPEED_SMC_R_MAX * 4);
>      sysbus_init_mmio(sbd, &s->mmio);
>  
> +    s->flashes = g_new0(AspeedSMCFlashState *, s->num_cs);
> +
>      return 0;
>  }
>  
> @@ -368,3 +370,63 @@ static void aspeed_smc_flash_register_types(void)
>  }
>  
>  type_init(aspeed_smc_flash_register_types)
> +
> +/*
> + * Default segments mappings and size for each slave
> + */
> +typedef struct AspeedSegments {
> +    hwaddr addr;
> +    uint32_t size;
> +} AspeedSegments;
> +
> +/* unused */
> +static const AspeedSegments aspeed_segment_legacy[] = {
> +    { 0x14000000, 32 * 1024 * 1024 },
> +};
> +
> +static const AspeedSegments aspeed_segment_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_segment_spi[] = {
> +    { 0x30000000, 64 * 1024 * 1024 },
> +};
> +
> +static const AspeedSegments *aspeed_segments[] = {
> +    aspeed_segment_legacy, aspeed_segment_fmc, aspeed_segment_spi
> +};
> +
> +void aspeed_smc_init_flashes(AspeedSMCState *s, const char *flashtype)
> +{
> +    int i ;
> +    char name[32];
> +
> +    for (i = 0; i < s->num_cs; ++i) {
> +        Object *new = object_new(TYPE_ASPEED_SMC_FLASH);
> +        AspeedSMCFlashState *fl = ASPEED_SMC_FLASH(new);
> +        qemu_irq cs_line;
> +
> +        s->flashes[i] = fl;
> +
> +        snprintf(name, sizeof(name), "aspeed.%s.%d",
> +                 aspeed_smc_types[s->smc_type], i);
> +
> +        fl->id = i;
> +        fl->controller = s;
> +        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);
> +
> +        memory_region_init_io(&fl->mmio, new, &aspeed_smc_flash_ops, fl, name,
> +                              aspeed_segments[s->smc_type][i].size);
> +        sysbus_init_mmio(SYS_BUS_DEVICE(new), &fl->mmio);
> +
> +        sysbus_mmio_map(SYS_BUS_DEVICE(new), 0,
> +                        aspeed_segments[s->smc_type][i].addr);
> +    }
> +}
> diff --git a/include/hw/ssi/aspeed_smc.h b/include/hw/ssi/aspeed_smc.h
> index 6cea1313eabd..1625dfb76a63 100644
> --- a/include/hw/ssi/aspeed_smc.h
> +++ b/include/hw/ssi/aspeed_smc.h
> @@ -74,10 +74,13 @@ typedef struct AspeedSMCState {
>      uint8_t r_conf;
>      uint8_t r_ctrl0;
>      uint8_t conf_enable_w0;
> +
> +    AspeedSMCFlashState **flashes;
>  } AspeedSMCState;
>  
>  #define TYPE_ASPEED_SPI "aspeed.spi"
>  #define ASPEED_SPI(obj) OBJECT_CHECK(AspeedSPIState, (obj), TYPE_ASPEED_SPI)
>  
> +extern void aspeed_smc_init_flashes(AspeedSMCState *s, const char *flashtype);

extern seems superfluous here? Doesn't really matter though.

Cheers,

Andrew

>  
>  #endif /* ASPEED_SMC_H */
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