1 files changed, 234 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index ffaf0534e33c..bf872f694f50 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -27,6 +27,7 @@
 #include <drm/amdgpu_drm.h>
 #include "amdgpu.h"
 #include "amdgpu_atombios.h"
+#include "amdgpu_atomfirmware.h"
 #include "amdgpu_i2c.h"
 
 #include "atom.h"
@@ -1699,7 +1700,7 @@ void amdgpu_atombios_scratch_regs_lock(struct amdgpu_device *adev, bool lock)
         WREG32(adev->bios_scratch_reg_offset + 6, bios_6_scratch);
 }
 
-void amdgpu_atombios_scratch_regs_init(struct amdgpu_device *adev)
+static void amdgpu_atombios_scratch_regs_init(struct amdgpu_device *adev)
 {
         uint32_t bios_2_scratch, bios_6_scratch;
 
@@ -1776,7 +1777,7 @@ void amdgpu_atombios_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le)
 #endif
 }
 
-int amdgpu_atombios_allocate_fb_scratch(struct amdgpu_device *adev)
+static int amdgpu_atombios_allocate_fb_scratch(struct amdgpu_device *adev)
 {
         struct atom_context *ctx = adev->mode_info.atom_context;
         int index = GetIndexIntoMasterTable(DATA, VRAM_UsageByFirmware);
@@ -1819,3 +1820,234 @@ int amdgpu_atombios_allocate_fb_scratch(struct amdgpu_device *adev)
         ctx->scratch_size_bytes = usage_bytes;
         return 0;
 }
+
+/* ATOM accessor methods */
+/*
+ * ATOM is an interpreted byte code stored in tables in the vbios.  The
+ * driver registers callbacks to access registers and the interpreter
+ * in the driver parses the tables and executes then to program specific
+ * actions (set display modes, asic init, etc.).  See amdgpu_atombios.c,
+ * atombios.h, and atom.c
+ */
+
+/**
+ * cail_pll_read - read PLL register
+ *
+ * @info: atom card_info pointer
+ * @reg: PLL register offset
+ *
+ * Provides a PLL register accessor for the atom interpreter (r4xx+).
+ * Returns the value of the PLL register.
+ */
+static uint32_t cail_pll_read(struct card_info *info, uint32_t reg)
+{
+        return 0;
+}
+
+/**
+ * cail_pll_write - write PLL register
+ *
+ * @info: atom card_info pointer
+ * @reg: PLL register offset
+ * @val: value to write to the pll register
+ *
+ * Provides a PLL register accessor for the atom interpreter (r4xx+).
+ */
+static void cail_pll_write(struct card_info *info, uint32_t reg, uint32_t val)
+{
+
+}
+
+/**
+ * cail_mc_read - read MC (Memory Controller) register
+ *
+ * @info: atom card_info pointer
+ * @reg: MC register offset
+ *
+ * Provides an MC register accessor for the atom interpreter (r4xx+).
+ * Returns the value of the MC register.
+ */
+static uint32_t cail_mc_read(struct card_info *info, uint32_t reg)
+{
+        return 0;
+}
+
+/**
+ * cail_mc_write - write MC (Memory Controller) register
+ *
+ * @info: atom card_info pointer
+ * @reg: MC register offset
+ * @val: value to write to the pll register
+ *
+ * Provides a MC register accessor for the atom interpreter (r4xx+).
+ */
+static void cail_mc_write(struct card_info *info, uint32_t reg, uint32_t val)
+{
+
+}
+
+/**
+ * cail_reg_write - write MMIO register
+ *
+ * @info: atom card_info pointer
+ * @reg: MMIO register offset
+ * @val: value to write to the pll register
+ *
+ * Provides a MMIO register accessor for the atom interpreter (r4xx+).
+ */
+static void cail_reg_write(struct card_info *info, uint32_t reg, uint32_t val)
+{
+        struct amdgpu_device *adev = info->dev->dev_private;
+
+        WREG32(reg, val);
+}
+
+/**
+ * cail_reg_read - read MMIO register
+ *
+ * @info: atom card_info pointer
+ * @reg: MMIO register offset
+ *
+ * Provides an MMIO register accessor for the atom interpreter (r4xx+).
+ * Returns the value of the MMIO register.
+ */
+static uint32_t cail_reg_read(struct card_info *info, uint32_t reg)
+{
+        struct amdgpu_device *adev = info->dev->dev_private;
+        uint32_t r;
+
+        r = RREG32(reg);
+        return r;
+}
+
+/**
+ * cail_ioreg_write - write IO register
+ *
+ * @info: atom card_info pointer
+ * @reg: IO register offset
+ * @val: value to write to the pll register
+ *
+ * Provides a IO register accessor for the atom interpreter (r4xx+).
+ */
+static void cail_ioreg_write(struct card_info *info, uint32_t reg, uint32_t val)
+{
+        struct amdgpu_device *adev = info->dev->dev_private;
+
+        WREG32_IO(reg, val);
+}
+
+/**
+ * cail_ioreg_read - read IO register
+ *
+ * @info: atom card_info pointer
+ * @reg: IO register offset
+ *
+ * Provides an IO register accessor for the atom interpreter (r4xx+).
+ * Returns the value of the IO register.
+ */
+static uint32_t cail_ioreg_read(struct card_info *info, uint32_t reg)
+{
+        struct amdgpu_device *adev = info->dev->dev_private;
+        uint32_t r;
+
+        r = RREG32_IO(reg);
+        return r;
+}
+
+static ssize_t amdgpu_atombios_get_vbios_version(struct device *dev,
+                                                 struct device_attribute *attr,
+                                                 char *buf)
+{
+        struct drm_device *ddev = dev_get_drvdata(dev);
+        struct amdgpu_device *adev = ddev->dev_private;
+        struct atom_context *ctx = adev->mode_info.atom_context;
+
+        return snprintf(buf, PAGE_SIZE, "%s\n", ctx->vbios_version);
+}
+
+static DEVICE_ATTR(vbios_version, 0444, amdgpu_atombios_get_vbios_version,
+                   NULL);
+
+/**
+ * amdgpu_atombios_fini - free the driver info and callbacks for atombios
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Frees the driver info and register access callbacks for the ATOM
+ * interpreter (r4xx+).
+ * Called at driver shutdown.
+ */
+void amdgpu_atombios_fini(struct amdgpu_device *adev)
+{
+        if (adev->mode_info.atom_context) {
+                kfree(adev->mode_info.atom_context->scratch);
+                kfree(adev->mode_info.atom_context->iio);
+        }
+        kfree(adev->mode_info.atom_context);
+        adev->mode_info.atom_context = NULL;
+        kfree(adev->mode_info.atom_card_info);
+        adev->mode_info.atom_card_info = NULL;
+        device_remove_file(adev->dev, &dev_attr_vbios_version);
+}
+
+/**
+ * amdgpu_atombios_init - init the driver info and callbacks for atombios
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Initializes the driver info and register access callbacks for the
+ * ATOM interpreter (r4xx+).
+ * Returns 0 on sucess, -ENOMEM on failure.
+ * Called at driver startup.
+ */
+int amdgpu_atombios_init(struct amdgpu_device *adev)
+{
+        struct card_info *atom_card_info =
+            kzalloc(sizeof(struct card_info), GFP_KERNEL);
+        int ret;
+
+        if (!atom_card_info)
+                return -ENOMEM;
+
+        adev->mode_info.atom_card_info = atom_card_info;
+        atom_card_info->dev = adev->ddev;
+        atom_card_info->reg_read = cail_reg_read;
+        atom_card_info->reg_write = cail_reg_write;
+        /* needed for iio ops */
+        if (adev->rio_mem) {
+                atom_card_info->ioreg_read = cail_ioreg_read;
+                atom_card_info->ioreg_write = cail_ioreg_write;
+        } else {
+                DRM_DEBUG("PCI I/O BAR is not found. Using MMIO to access ATOM BIOS\n");
+                atom_card_info->ioreg_read = cail_reg_read;
+                atom_card_info->ioreg_write = cail_reg_write;
+        }
+        atom_card_info->mc_read = cail_mc_read;
+        atom_card_info->mc_write = cail_mc_write;
+        atom_card_info->pll_read = cail_pll_read;
+        atom_card_info->pll_write = cail_pll_write;
+
+        adev->mode_info.atom_context = amdgpu_atom_parse(atom_card_info, adev->bios);
+        if (!adev->mode_info.atom_context) {
+                amdgpu_atombios_fini(adev);
+                return -ENOMEM;
+        }
+
+        mutex_init(&adev->mode_info.atom_context->mutex);
+        if (adev->is_atom_fw) {
+                amdgpu_atomfirmware_scratch_regs_init(adev);
+                amdgpu_atomfirmware_allocate_fb_scratch(adev);
+        } else {
+                amdgpu_atombios_scratch_regs_init(adev);
+                amdgpu_atombios_allocate_fb_scratch(adev);
+        }
+
+        ret = device_create_file(adev->dev, &dev_attr_vbios_version);
+        if (ret) {
+                DRM_ERROR("Failed to create device file for VBIOS version\n");
+                return ret;
+        }
+
+        return 0;
+}
+