2 * Copyright © 2013 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
26 #include "intel_drv.h"
29 static int vlv_punit_rw(struct drm_i915_private *dev_priv, u32 port, u8 opcode,
32 u32 cmd, devfn, be, bar;
36 devfn = PCI_DEVFN(2, 0);
38 cmd = (devfn << IOSF_DEVFN_SHIFT) | (opcode << IOSF_OPCODE_SHIFT) |
39 (port << IOSF_PORT_SHIFT) | (be << IOSF_BYTE_ENABLES_SHIFT) |
40 (bar << IOSF_BAR_SHIFT);
42 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
44 if (I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) {
45 DRM_DEBUG_DRIVER("warning: pcode (%s) mailbox access failed\n",
46 opcode == PUNIT_OPCODE_REG_READ ?
51 I915_WRITE(VLV_IOSF_ADDR, addr);
52 if (opcode == PUNIT_OPCODE_REG_WRITE)
53 I915_WRITE(VLV_IOSF_DATA, *val);
54 I915_WRITE(VLV_IOSF_DOORBELL_REQ, cmd);
56 if (wait_for((I915_READ(VLV_IOSF_DOORBELL_REQ) & IOSF_SB_BUSY) == 0,
58 DRM_ERROR("timeout waiting for pcode %s (%d) to finish\n",
59 opcode == PUNIT_OPCODE_REG_READ ? "read" : "write",
64 if (opcode == PUNIT_OPCODE_REG_READ)
65 *val = I915_READ(VLV_IOSF_DATA);
66 I915_WRITE(VLV_IOSF_DATA, 0);
71 int valleyview_punit_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
73 return vlv_punit_rw(dev_priv, IOSF_PORT_PUNIT, PUNIT_OPCODE_REG_READ,
77 int valleyview_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val)
79 return vlv_punit_rw(dev_priv, IOSF_PORT_PUNIT, PUNIT_OPCODE_REG_WRITE,
83 int valleyview_nc_read(struct drm_i915_private *dev_priv, u8 addr, u32 *val)
85 return vlv_punit_rw(dev_priv, IOSF_PORT_NC, PUNIT_OPCODE_REG_READ,
89 u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
91 WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
93 if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
94 DRM_ERROR("DPIO idle wait timed out\n");
98 I915_WRITE(DPIO_REG, reg);
99 I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_READ | DPIO_PORTID |
101 if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
102 DRM_ERROR("DPIO read wait timed out\n");
106 return I915_READ(DPIO_DATA);
109 void intel_dpio_write(struct drm_i915_private *dev_priv, int reg, u32 val)
111 WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
113 if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
114 DRM_ERROR("DPIO idle wait timed out\n");
118 I915_WRITE(DPIO_DATA, val);
119 I915_WRITE(DPIO_REG, reg);
120 I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_WRITE | DPIO_PORTID |
122 if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100))
123 DRM_ERROR("DPIO write wait timed out\n");
127 u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
128 enum intel_sbi_destination destination)
131 WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
133 if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
135 DRM_ERROR("timeout waiting for SBI to become ready\n");
139 I915_WRITE(SBI_ADDR, (reg << 16));
141 if (destination == SBI_ICLK)
142 value = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRRD;
144 value = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
145 I915_WRITE(SBI_CTL_STAT, value | SBI_BUSY);
147 if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
149 DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
153 return I915_READ(SBI_DATA);
156 void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
157 enum intel_sbi_destination destination)
161 WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
163 if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
165 DRM_ERROR("timeout waiting for SBI to become ready\n");
169 I915_WRITE(SBI_ADDR, (reg << 16));
170 I915_WRITE(SBI_DATA, value);
172 if (destination == SBI_ICLK)
173 tmp = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRWR;
175 tmp = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IOWR;
176 I915_WRITE(SBI_CTL_STAT, SBI_BUSY | tmp);
178 if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
180 DRM_ERROR("timeout waiting for SBI to complete write transaction\n");