--- /dev/null
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "i915_drv.h"
+#include "intel_drv.h"
+
+/*
+ * IOSF sideband, see VLV2_SidebandMsg_HAS.docx and
+ * VLV_VLV2_PUNIT_HAS_0.8.docx
+ */
+
+/* Standard MMIO read, non-posted */
+#define SB_MRD_NP 0x00
+/* Standard MMIO write, non-posted */
+#define SB_MWR_NP 0x01
+/* Private register read, double-word addressing, non-posted */
+#define SB_CRRDDA_NP 0x06
+/* Private register write, double-word addressing, non-posted */
+#define SB_CRWRDA_NP 0x07
+
+static int vlv_sideband_rw(struct drm_i915_private *dev_priv, u32 devfn,
+ u32 port, u32 opcode, u32 addr, u32 *val)
+{
+ u32 cmd, be = 0xf, bar = 0;
+ bool is_read = (opcode == SB_MRD_NP || opcode == SB_CRRDDA_NP);
+
+ cmd = (devfn << IOSF_DEVFN_SHIFT) | (opcode << IOSF_OPCODE_SHIFT) |
+ (port << IOSF_PORT_SHIFT) | (be << IOSF_BYTE_ENABLES_SHIFT) |
+ (bar << IOSF_BAR_SHIFT);
+
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
+
+ if (wait_for((I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) == 0, 5)) {
+ DRM_DEBUG_DRIVER("IOSF sideband idle wait (%s) timed out\n",
+ is_read ? "read" : "write");
+ return -EAGAIN;
+ }
+
+ I915_WRITE(VLV_IOSF_ADDR, addr);
+ if (!is_read)
+ I915_WRITE(VLV_IOSF_DATA, *val);
+ I915_WRITE(VLV_IOSF_DOORBELL_REQ, cmd);
+
+ if (wait_for((I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) == 0, 5)) {
+ DRM_DEBUG_DRIVER("IOSF sideband finish wait (%s) timed out\n",
+ is_read ? "read" : "write");
+ return -ETIMEDOUT;
+ }
+
+ if (is_read)
+ *val = I915_READ(VLV_IOSF_DATA);
+ I915_WRITE(VLV_IOSF_DATA, 0);
+
+ return 0;
+}
+
+u32 vlv_punit_read(struct drm_i915_private *dev_priv, u32 addr)
+{
+ u32 val = 0;
+
+ WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+
+ mutex_lock(&dev_priv->dpio_lock);
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
+ SB_CRRDDA_NP, addr, &val);
+ mutex_unlock(&dev_priv->dpio_lock);
+
+ return val;
+}
+
+void vlv_punit_write(struct drm_i915_private *dev_priv, u32 addr, u32 val)
+{
+ WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+
+ mutex_lock(&dev_priv->dpio_lock);
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
+ SB_CRWRDA_NP, addr, &val);
+ mutex_unlock(&dev_priv->dpio_lock);
+}
+
+u32 vlv_bunit_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val = 0;
+
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_BUNIT,
+ SB_CRRDDA_NP, reg, &val);
+
+ return val;
+}
+
+void vlv_bunit_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_BUNIT,
+ SB_CRWRDA_NP, reg, &val);
+}
+
+u32 vlv_nc_read(struct drm_i915_private *dev_priv, u8 addr)
+{
+ u32 val = 0;
+
+ WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+
+ mutex_lock(&dev_priv->dpio_lock);
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_NC,
+ SB_CRRDDA_NP, addr, &val);
+ mutex_unlock(&dev_priv->dpio_lock);
+
+ return val;
+}
+
+u32 vlv_gpio_nc_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val = 0;
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_GPIO_NC,
+ SB_CRRDDA_NP, reg, &val);
+ return val;
+}
+
+void vlv_gpio_nc_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_GPIO_NC,
+ SB_CRWRDA_NP, reg, &val);
+}
+
+u32 vlv_cck_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val = 0;
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_CCK,
+ SB_CRRDDA_NP, reg, &val);
+ return val;
+}
+
+void vlv_cck_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_CCK,
+ SB_CRWRDA_NP, reg, &val);
+}
+
+u32 vlv_ccu_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val = 0;
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_CCU,
+ SB_CRRDDA_NP, reg, &val);
+ return val;
+}
+
+void vlv_ccu_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_CCU,
+ SB_CRWRDA_NP, reg, &val);
+}
+
+u32 vlv_gps_core_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val = 0;
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_GPS_CORE,
+ SB_CRRDDA_NP, reg, &val);
+ return val;
+}
+
+void vlv_gps_core_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_GPS_CORE,
+ SB_CRWRDA_NP, reg, &val);
+}
+
+u32 vlv_dpio_read(struct drm_i915_private *dev_priv, enum pipe pipe, int reg)
+{
+ u32 val = 0;
+
+ vlv_sideband_rw(dev_priv, DPIO_DEVFN, DPIO_PHY_IOSF_PORT(DPIO_PHY(pipe)),
+ SB_MRD_NP, reg, &val);
+
+ /*
+ * FIXME: There might be some registers where all 1's is a valid value,
+ * so ideally we should check the register offset instead...
+ */
+ WARN(val == 0xffffffff, "DPIO read pipe %c reg 0x%x == 0x%x\n",
+ pipe_name(pipe), reg, val);
+
+ return val;
+}
+
+void vlv_dpio_write(struct drm_i915_private *dev_priv, enum pipe pipe, int reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, DPIO_DEVFN, DPIO_PHY_IOSF_PORT(DPIO_PHY(pipe)),
+ SB_MWR_NP, reg, &val);
+}
+
+/* SBI access */
+u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
+ enum intel_sbi_destination destination)
+{
+ u32 value = 0;
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
+
+ if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
+ 100)) {
+ DRM_ERROR("timeout waiting for SBI to become ready\n");
+ return 0;
+ }
+
+ I915_WRITE(SBI_ADDR, (reg << 16));
+
+ if (destination == SBI_ICLK)
+ value = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRRD;
+ else
+ value = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
+ I915_WRITE(SBI_CTL_STAT, value | SBI_BUSY);
+
+ if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
+ 100)) {
+ DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
+ return 0;
+ }
+
+ return I915_READ(SBI_DATA);
+}
+
+void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
+ enum intel_sbi_destination destination)
+{
+ u32 tmp;
+
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
+
+ if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
+ 100)) {
+ DRM_ERROR("timeout waiting for SBI to become ready\n");
+ return;
+ }
+
+ I915_WRITE(SBI_ADDR, (reg << 16));
+ I915_WRITE(SBI_DATA, value);
+
+ if (destination == SBI_ICLK)
+ tmp = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRWR;
+ else
+ tmp = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IOWR;
+ I915_WRITE(SBI_CTL_STAT, SBI_BUSY | tmp);
+
+ if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
+ 100)) {
+ DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
+ return;
+ }
+}
+
+u32 vlv_flisdsi_read(struct drm_i915_private *dev_priv, u32 reg)
+{
+ u32 val = 0;
+ vlv_sideband_rw(dev_priv, DPIO_DEVFN, IOSF_PORT_FLISDSI, SB_CRRDDA_NP,
+ reg, &val);
+ return val;
+}
+
+void vlv_flisdsi_write(struct drm_i915_private *dev_priv, u32 reg, u32 val)
+{
+ vlv_sideband_rw(dev_priv, DPIO_DEVFN, IOSF_PORT_FLISDSI, SB_CRWRDA_NP,
+ reg, &val);
+}
Code Review / kvmfornfv.git / blobdiff