x86: tangier: Populate CSRT for shared DMA controller

Intel Tangier has a shared DMA controller that, according to Microsoft spec,
has to be presented in CSRT table.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/x86/cpu/tangier/acpi.c b/arch/x86/cpu/tangier/acpi.c
index 0e4f961c531407a76bf72df8bce523526dbaf011..61b2642aa95d600d2e8d7d84a56c443ace7c5002 100644 (file)
--- a/arch/x86/cpu/tangier/acpi.c
+++ b/arch/x86/cpu/tangier/acpi.c
@@ -68,6 +68,44 @@ u32 acpi_fill_mcfg(u32 current)
        return current;
 }
 
+static u32 acpi_fill_csrt_dma(struct acpi_csrt_group *grp)
+{
+       struct acpi_csrt_shared_info *si = (struct acpi_csrt_shared_info *)&grp[1];
+
+       /* Fill the Resource Group with Shared Information attached */
+       memset(grp, 0, sizeof(*grp));
+       grp->shared_info_length = sizeof(struct acpi_csrt_shared_info);
+       grp->length = sizeof(struct acpi_csrt_group) + grp->shared_info_length;
+       /* TODO: All values below should come from U-Boot DT somehow */
+       sprintf((char *)&grp->vendor_id, "%04X", 0x8086);
+       grp->device_id = 0x11a2;
+
+       /* Fill the Resource Group Shared Information */
+       memset(si, 0, sizeof(*si));
+       si->major_version = 1;
+       si->minor_version = 0;
+       /* TODO: All values below should come from U-Boot DT somehow */
+       si->mmio_base_low = 0xff192000;
+       si->mmio_base_high = 0;
+       si->gsi_interrupt = 32;
+       si->interrupt_polarity = 1;
+       si->interrupt_mode = 0;
+       si->num_channels = 8;
+       si->dma_address_width = 32;
+       si->base_request_line = 0;
+       si->num_handshake_signals = 16;
+       si->max_block_size = 0x20000;
+
+       return grp->length;
+}
+
+u32 acpi_fill_csrt(u32 current)
+{
+       current += acpi_fill_csrt_dma((struct acpi_csrt_group *)current);
+
+       return current;
+}
+
 void acpi_create_gnvs(struct acpi_global_nvs *gnvs)
 {
        struct udevice *dev;