On Thu, Sep 15, 2022 at 11:30 PM Bernhard Beschow <shen...@gmail.com> wrote:
>
> Adds missing functionality to emulated e500 SOCs which increases the
> chance of given "real" firmware images to access SD cards.
By "firmware" do you mean U-Boot?
>
> Signed-off-by: Bernhard Beschow <shen...@gmail.com>
> ---
> docs/system/ppc/ppce500.rst | 13 +++++++++++++
> hw/ppc/Kconfig | 1 +
> hw/ppc/e500.c | 32 ++++++++++++++++++++++++++++++++
> 3 files changed, 46 insertions(+)
>
> diff --git a/docs/system/ppc/ppce500.rst b/docs/system/ppc/ppce500.rst
> index c3f55c6f3d..50b199c8f3 100644
> --- a/docs/system/ppc/ppce500.rst
> +++ b/docs/system/ppc/ppce500.rst
> @@ -19,6 +19,7 @@ The ``ppce500`` machine supports the following devices:
> * Power-off functionality via one GPIO pin
> * 1 Freescale MPC8xxx PCI host controller
> * VirtIO devices via PCI bus
> +* 1 Freescale Enhanced Secure Digital Host controller (eSDHC)
> * 1 Freescale Enhanced Triple Speed Ethernet controller (eTSEC)
>
> Hardware configuration information
> @@ -131,6 +132,18 @@ be used as follows:
> -drive if=pflash,file=/path/to/rootfs.ext2,format=raw \
> -append "rootwait root=/dev/mtdblock0"
>
> +Alternatively, the root file system can also reside on an emulated SD card
> +whose size must again be a power of two:
> +
> +.. code-block:: bash
> +
> + $ qemu-system-ppc64 -M ppce500 -cpu e500mc -smp 4 -m 2G \
qemu-system-ppc{64|32}
> + -display none -serial stdio \
> + -kernel vmlinux \
> + -device sd-card,drive=mydrive \
> + -drive id=mydrive,if=none,file=/path/to/rootfs.ext2,format=raw \
> + -append "rootwait root=/dev/mmcblk0"
> +
> Running U-Boot
> --------------
>
> diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
> index 769a1ead1c..6e31f568ba 100644
> --- a/hw/ppc/Kconfig
> +++ b/hw/ppc/Kconfig
> @@ -129,6 +129,7 @@ config E500
> select PFLASH_CFI01
> select PLATFORM_BUS
> select PPCE500_PCI
> + select SDHCI
> select SERIAL
> select MPC_I2C
> select FDT_PPC
> diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
> index 7843a4e04b..87a03fd4a9 100644
> --- a/hw/ppc/e500.c
> +++ b/hw/ppc/e500.c
> @@ -48,6 +48,7 @@
> #include "hw/net/fsl_etsec/etsec.h"
> #include "hw/i2c/i2c.h"
> #include "hw/irq.h"
> +#include "hw/sd/sdhci.h"
>
> #define EPAPR_MAGIC (0x45504150)
> #define DTC_LOAD_PAD 0x1800000
> @@ -66,11 +67,14 @@
> #define MPC8544_SERIAL1_REGS_OFFSET 0x4600ULL
> #define MPC8544_PCI_REGS_OFFSET 0x8000ULL
> #define MPC8544_PCI_REGS_SIZE 0x1000ULL
> +#define MPC85XX_ESDHC_REGS_OFFSET 0x2e000ULL
> +#define MPC85XX_ESDHC_REGS_SIZE 0x1000ULL
> #define MPC8544_UTIL_OFFSET 0xe0000ULL
> #define MPC8XXX_GPIO_OFFSET 0x000FF000ULL
> #define MPC8544_I2C_REGS_OFFSET 0x3000ULL
> #define MPC8XXX_GPIO_IRQ 47
> #define MPC8544_I2C_IRQ 43
> +#define MPC85XX_ESDHC_IRQ 72
> #define RTC_REGS_OFFSET 0x68
>
> #define PLATFORM_CLK_FREQ_HZ (400 * 1000 * 1000)
> @@ -203,6 +207,25 @@ static void dt_i2c_create(void *fdt, const char *soc,
> const char *mpic,
> g_free(i2c);
> }
>
> +static void dt_sdhc_create(void *fdt, const char *parent, const char *mpic)
> +{
> + hwaddr mmio = MPC85XX_ESDHC_REGS_OFFSET;
> + hwaddr size = MPC85XX_ESDHC_REGS_SIZE;
> + int irq = MPC85XX_ESDHC_IRQ;
> + char *name;
> +
> + name = g_strdup_printf("%s/sdhc@%" PRIx64, parent, mmio);
> + qemu_fdt_add_subnode(fdt, name);
> + /* qemu_fdt_setprop_cells(fdt, name, "voltage-ranges", 3300, 3300); */
Drop it if it is useless
> + qemu_fdt_setprop_cells(fdt, name, "clock-frequency", 167000000);
Is this an arbitrary frequency?
> + qemu_fdt_setprop(fdt, name, "sdhci,auto-cmd12", NULL, 0);
> + qemu_fdt_setprop_phandle(fdt, name, "interrupt-parent", mpic);
> + qemu_fdt_setprop_cells(fdt, name, "bus-width", 4);
> + qemu_fdt_setprop_cells(fdt, name, "interrupts", irq, 0x2);
> + qemu_fdt_setprop_cells(fdt, name, "reg", mmio, size);
> + qemu_fdt_setprop_string(fdt, name, "compatible", "fsl,esdhc");
> + g_free(name);
> +}
>
> typedef struct PlatformDevtreeData {
> void *fdt;
> @@ -556,6 +579,8 @@ static int ppce500_load_device_tree(PPCE500MachineState
> *pms,
>
> dt_rtc_create(fdt, "i2c", "rtc");
>
> + /* sdhc */
> + dt_sdhc_create(fdt, soc, mpic);
>
> gutil = g_strdup_printf("%s/global-utilities@%llx", soc,
> MPC8544_UTIL_OFFSET);
> @@ -996,6 +1021,13 @@ void ppce500_init(MachineState *machine)
> i2c_slave_create_simple(i2c, "ds1338", RTC_REGS_OFFSET);
>
>
nits: use one line for the separation
> + /* eSDHC */
> + dev = qdev_new(TYPE_FSL_ESDHC);
> + s = SYS_BUS_DEVICE(dev);
> + sysbus_realize_and_unref(s, &error_fatal);
> + sysbus_mmio_map(s, 0, pmc->ccsrbar_base + MPC85XX_ESDHC_REGS_OFFSET);
> + sysbus_connect_irq(s, 0, qdev_get_gpio_in(mpicdev, MPC85XX_ESDHC_IRQ));
> +
> /* General Utility device */
> dev = qdev_new("mpc8544-guts");
> s = SYS_BUS_DEVICE(dev);
> --
Regards,
Bin
