Supported on rv6xx/r7xx/evergreen. Cards come up in gen1 mode.
Signed-off-by: Alex Deucher <alexdeucher at gmail.com>
---
drivers/gpu/drm/radeon/evergreen.c | 53 ++++++++++++++++++
drivers/gpu/drm/radeon/evergreend.h | 38 +++++++++++++
drivers/gpu/drm/radeon/r600.c | 102 +++++++++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/r600d.h | 39 +++++++++++++
drivers/gpu/drm/radeon/radeon.h | 2 +
drivers/gpu/drm/radeon/rv770.c | 76 ++++++++++++++++++++++++++
drivers/gpu/drm/radeon/rv770d.h | 38 +++++++++++++
7 files changed, 348 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/evergreen.c
b/drivers/gpu/drm/radeon/evergreen.c
index eaf4fba..11344c7 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -39,6 +39,7 @@
static void evergreen_gpu_init(struct radeon_device *rdev);
void evergreen_fini(struct radeon_device *rdev);
+static void evergreen_pcie_gen2_enable(struct radeon_device *rdev);
void evergreen_pre_page_flip(struct radeon_device *rdev, int crtc)
{
@@ -2767,6 +2768,9 @@ static int evergreen_startup(struct radeon_device *rdev)
{
int r;
+ /* enable pcie gen2 link */
+ evergreen_pcie_gen2_enable(rdev);
+
if (!rdev->me_fw || !rdev->pfp_fw || !rdev->rlc_fw) {
r = r600_init_microcode(rdev);
if (r) {
@@ -3049,3 +3053,52 @@ void evergreen_fini(struct radeon_device *rdev)
rdev->bios = NULL;
radeon_dummy_page_fini(rdev);
}
+
+static void evergreen_pcie_gen2_enable(struct radeon_device *rdev)
+{
+ u32 link_width_cntl, speed_cntl;
+
+ if (rdev->flags & RADEON_IS_IGP)
+ return;
+
+ if (!(rdev->flags & RADEON_IS_PCIE))
+ return;
+
+ /* x2 cards have a special sequence */
+ if (ASIC_IS_X2(rdev))
+ return;
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ if ((speed_cntl & LC_OTHER_SIDE_EVER_SENT_GEN2) ||
+ (speed_cntl & LC_OTHER_SIDE_SUPPORTS_GEN2)) {
+
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ link_width_cntl &= ~LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl &= ~LC_TARGET_LINK_SPEED_OVERRIDE_EN;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl |= LC_CLR_FAILED_SPD_CHANGE_CNT;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl &= ~LC_CLR_FAILED_SPD_CHANGE_CNT;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl |= LC_GEN2_EN_STRAP;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ } else {
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ /* XXX: only disable it if gen1 bridge vendor == 0x111d or
0x1106 */
+ if (1)
+ link_width_cntl |= LC_UPCONFIGURE_DIS;
+ else
+ link_width_cntl &= ~LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ }
+}
diff --git a/drivers/gpu/drm/radeon/evergreend.h
b/drivers/gpu/drm/radeon/evergreend.h
index 94140e1..b8da323 100644
--- a/drivers/gpu/drm/radeon/evergreend.h
+++ b/drivers/gpu/drm/radeon/evergreend.h
@@ -581,6 +581,44 @@
# define DC_HPDx_RX_INT_TIMER(x) ((x) << 16)
# define DC_HPDx_EN (1 << 28)
+/* PCIE link stuff */
+#define PCIE_LC_TRAINING_CNTL 0xa1 /* PCIE_P */
+#define PCIE_LC_LINK_WIDTH_CNTL 0xa2 /* PCIE_P */
+# define LC_LINK_WIDTH_SHIFT 0
+# define LC_LINK_WIDTH_MASK 0x7
+# define LC_LINK_WIDTH_X0 0
+# define LC_LINK_WIDTH_X1 1
+# define LC_LINK_WIDTH_X2 2
+# define LC_LINK_WIDTH_X4 3
+# define LC_LINK_WIDTH_X8 4
+# define LC_LINK_WIDTH_X16 6
+# define LC_LINK_WIDTH_RD_SHIFT 4
+# define LC_LINK_WIDTH_RD_MASK 0x70
+# define LC_RECONFIG_ARC_MISSING_ESCAPE (1 << 7)
+# define LC_RECONFIG_NOW (1 << 8)
+# define LC_RENEGOTIATION_SUPPORT (1 << 9)
+# define LC_RENEGOTIATE_EN (1 << 10)
+# define LC_SHORT_RECONFIG_EN (1 << 11)
+# define LC_UPCONFIGURE_SUPPORT (1 << 12)
+# define LC_UPCONFIGURE_DIS (1 << 13)
+#define PCIE_LC_SPEED_CNTL 0xa4 /* PCIE_P */
+# define LC_GEN2_EN_STRAP (1 << 0)
+# define LC_TARGET_LINK_SPEED_OVERRIDE_EN (1 << 1)
+# define LC_FORCE_EN_HW_SPEED_CHANGE (1 << 5)
+# define LC_FORCE_DIS_HW_SPEED_CHANGE (1 << 6)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK (0x3 << 8)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT 3
+# define LC_CURRENT_DATA_RATE (1 << 11)
+# define LC_VOLTAGE_TIMER_SEL_MASK (0xf << 14)
+# define LC_CLR_FAILED_SPD_CHANGE_CNT (1 << 21)
+# define LC_OTHER_SIDE_EVER_SENT_GEN2 (1 << 23)
+# define LC_OTHER_SIDE_SUPPORTS_GEN2 (1 << 24)
+#define MM_CFGREGS_CNTL 0x544c
+# define MM_WR_TO_CFG_EN (1 << 3)
+#define LINK_CNTL2 0x88 /* F0 */
+# define TARGET_LINK_SPEED_MASK (0xf << 0)
+# define SELECTABLE_DEEMPHASIS (1 << 6)
+
/*
* PM4
*/
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 60ad8c0..6b50716 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -94,6 +94,7 @@ int r600_mc_wait_for_idle(struct radeon_device *rdev);
void r600_gpu_init(struct radeon_device *rdev);
void r600_fini(struct radeon_device *rdev);
void r600_irq_disable(struct radeon_device *rdev);
+static void r600_pcie_gen2_enable(struct radeon_device *rdev);
/* get temperature in millidegrees */
u32 rv6xx_get_temp(struct radeon_device *rdev)
@@ -2379,6 +2380,9 @@ int r600_startup(struct radeon_device *rdev)
{
int r;
+ /* enable pcie gen2 link */
+ r600_pcie_gen2_enable(rdev);
+
if (!rdev->me_fw || !rdev->pfp_fw || !rdev->rlc_fw) {
r = r600_init_microcode(rdev);
if (r) {
@@ -3649,3 +3653,101 @@ int r600_get_pcie_lanes(struct radeon_device *rdev)
}
}
+static void r600_pcie_gen2_enable(struct radeon_device *rdev)
+{
+ u32 link_width_cntl, lanes, speed_cntl, training_cntl, tmp;
+ u16 link_cntl2;
+
+ if (rdev->flags & RADEON_IS_IGP)
+ return;
+
+ if (!(rdev->flags & RADEON_IS_PCIE))
+ return;
+
+ /* x2 cards have a special sequence */
+ if (ASIC_IS_X2(rdev))
+ return;
+
+ /* only RV6xx+ chips are supported */
+ if (rdev->family <= CHIP_R600)
+ return;
+
+ /* 55 nm r6xx asics */
+ if ((rdev->family == CHIP_RV670) ||
+ (rdev->family == CHIP_RV620) ||
+ (rdev->family == CHIP_RV635)) {
+ /* advertise upconfig capability */
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ link_width_cntl &= ~LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ if (link_width_cntl & LC_RENEGOTIATION_SUPPORT) {
+ lanes = (link_width_cntl & LC_LINK_WIDTH_RD_MASK) >>
LC_LINK_WIDTH_RD_SHIFT;
+ link_width_cntl &= ~(LC_LINK_WIDTH_MASK |
+ LC_RECONFIG_ARC_MISSING_ESCAPE);
+ link_width_cntl |= lanes | LC_RECONFIG_NOW |
LC_RENEGOTIATE_EN;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ } else {
+ link_width_cntl |= LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ }
+ }
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ if ((speed_cntl & LC_OTHER_SIDE_EVER_SENT_GEN2) &&
+ (speed_cntl & LC_OTHER_SIDE_SUPPORTS_GEN2)) {
+
+ /* 55 nm r6xx asics */
+ if ((rdev->family == CHIP_RV670) ||
+ (rdev->family == CHIP_RV620) ||
+ (rdev->family == CHIP_RV635)) {
+ WREG32(MM_CFGREGS_CNTL, 0x8);
+ link_cntl2 = RREG32(0x4088);
+ WREG32(MM_CFGREGS_CNTL, 0);
+ /* not supported yet */
+ if (link_cntl2 & SELECTABLE_DEEMPHASIS)
+ return;
+ }
+
+ speed_cntl &= ~LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK;
+ speed_cntl |= (0x3 << LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT);
+ speed_cntl &= ~LC_VOLTAGE_TIMER_SEL_MASK;
+ speed_cntl &= ~LC_FORCE_DIS_HW_SPEED_CHANGE;
+ speed_cntl |= LC_FORCE_EN_HW_SPEED_CHANGE;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ tmp = RREG32(0x541c);
+ WREG32(0x541c, tmp | 0x8);
+ WREG32(MM_CFGREGS_CNTL, MM_WR_TO_CFG_EN);
+ link_cntl2 = RREG16(0x4088);
+ link_cntl2 &= ~TARGET_LINK_SPEED_MASK;
+ link_cntl2 |= 0x2;
+ WREG16(0x4088, link_cntl2);
+ WREG32(MM_CFGREGS_CNTL, 0);
+
+ if ((rdev->family == CHIP_RV670) ||
+ (rdev->family == CHIP_RV620) ||
+ (rdev->family == CHIP_RV635)) {
+ training_cntl = RREG32_PCIE_P(PCIE_LC_TRAINING_CNTL);
+ training_cntl &= ~LC_POINT_7_PLUS_EN;
+ WREG32_PCIE_P(PCIE_LC_TRAINING_CNTL, training_cntl);
+ } else {
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl &= ~LC_TARGET_LINK_SPEED_OVERRIDE_EN;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+ }
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl |= LC_GEN2_EN_STRAP;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ } else {
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ /* XXX: only disable it if gen1 bridge vendor == 0x111d or
0x1106 */
+ if (1)
+ link_width_cntl |= LC_UPCONFIGURE_DIS;
+ else
+ link_width_cntl &= ~LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ }
+}
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index c89cfa8..a5d898b 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -737,6 +737,45 @@
# define DxGRPH_PFLIP_INT_MASK (1 << 0)
# define DxGRPH_PFLIP_INT_TYPE (1 << 8)
+/* PCIE link stuff */
+#define PCIE_LC_TRAINING_CNTL 0xa1 /* PCIE_P */
+# define LC_POINT_7_PLUS_EN (1 << 6)
+#define PCIE_LC_LINK_WIDTH_CNTL 0xa2 /* PCIE_P */
+# define LC_LINK_WIDTH_SHIFT 0
+# define LC_LINK_WIDTH_MASK 0x7
+# define LC_LINK_WIDTH_X0 0
+# define LC_LINK_WIDTH_X1 1
+# define LC_LINK_WIDTH_X2 2
+# define LC_LINK_WIDTH_X4 3
+# define LC_LINK_WIDTH_X8 4
+# define LC_LINK_WIDTH_X16 6
+# define LC_LINK_WIDTH_RD_SHIFT 4
+# define LC_LINK_WIDTH_RD_MASK 0x70
+# define LC_RECONFIG_ARC_MISSING_ESCAPE (1 << 7)
+# define LC_RECONFIG_NOW (1 << 8)
+# define LC_RENEGOTIATION_SUPPORT (1 << 9)
+# define LC_RENEGOTIATE_EN (1 << 10)
+# define LC_SHORT_RECONFIG_EN (1 << 11)
+# define LC_UPCONFIGURE_SUPPORT (1 << 12)
+# define LC_UPCONFIGURE_DIS (1 << 13)
+#define PCIE_LC_SPEED_CNTL 0xa4 /* PCIE_P */
+# define LC_GEN2_EN_STRAP (1 << 0)
+# define LC_TARGET_LINK_SPEED_OVERRIDE_EN (1 << 1)
+# define LC_FORCE_EN_HW_SPEED_CHANGE (1 << 5)
+# define LC_FORCE_DIS_HW_SPEED_CHANGE (1 << 6)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK (0x3 << 8)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT 3
+# define LC_CURRENT_DATA_RATE (1 << 11)
+# define LC_VOLTAGE_TIMER_SEL_MASK (0xf << 14)
+# define LC_CLR_FAILED_SPD_CHANGE_CNT (1 << 21)
+# define LC_OTHER_SIDE_EVER_SENT_GEN2 (1 << 23)
+# define LC_OTHER_SIDE_SUPPORTS_GEN2 (1 << 24)
+#define MM_CFGREGS_CNTL 0x544c
+# define MM_WR_TO_CFG_EN (1 << 3)
+#define LINK_CNTL2 0x88 /* F0 */
+# define TARGET_LINK_SPEED_MASK (0xf << 0)
+# define SELECTABLE_DEEMPHASIS (1 << 6)
+
/*
* PM4
*/
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index e9fb64c..3e635c6 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1244,6 +1244,8 @@ static inline void r100_io_wreg(struct radeon_device
*rdev, u32 reg, u32 v)
*/
#define RREG8(reg) readb(((void __iomem *)rdev->rmmio) + (reg))
#define WREG8(reg, v) writeb(v, ((void __iomem *)rdev->rmmio) + (reg))
+#define RREG16(reg) readw(((void __iomem *)rdev->rmmio) + (reg))
+#define WREG16(reg, v) writew(v, ((void __iomem *)rdev->rmmio) + (reg))
#define RREG32(reg) r100_mm_rreg(rdev, (reg))
#define DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n",
r100_mm_rreg(rdev, (reg)))
#define WREG32(reg, v) r100_mm_wreg(rdev, (reg), (v))
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 645aa1f..3a264aa 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -41,6 +41,7 @@
static void rv770_gpu_init(struct radeon_device *rdev);
void rv770_fini(struct radeon_device *rdev);
+static void rv770_pcie_gen2_enable(struct radeon_device *rdev);
u32 rv770_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
{
@@ -1124,6 +1125,9 @@ static int rv770_startup(struct radeon_device *rdev)
{
int r;
+ /* enable pcie gen2 link */
+ rv770_pcie_gen2_enable(rdev);
+
if (!rdev->me_fw || !rdev->pfp_fw || !rdev->rlc_fw) {
r = r600_init_microcode(rdev);
if (r) {
@@ -1362,3 +1366,75 @@ void rv770_fini(struct radeon_device *rdev)
rdev->bios = NULL;
radeon_dummy_page_fini(rdev);
}
+
+static void rv770_pcie_gen2_enable(struct radeon_device *rdev)
+{
+ u32 link_width_cntl, lanes, speed_cntl, tmp;
+ u16 link_cntl2;
+
+ if (rdev->flags & RADEON_IS_IGP)
+ return;
+
+ if (!(rdev->flags & RADEON_IS_PCIE))
+ return;
+
+ /* x2 cards have a special sequence */
+ if (ASIC_IS_X2(rdev))
+ return;
+
+ /* advertise upconfig capability */
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ link_width_cntl &= ~LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ if (link_width_cntl & LC_RENEGOTIATION_SUPPORT) {
+ lanes = (link_width_cntl & LC_LINK_WIDTH_RD_MASK) >>
LC_LINK_WIDTH_RD_SHIFT;
+ link_width_cntl &= ~(LC_LINK_WIDTH_MASK |
+ LC_RECONFIG_ARC_MISSING_ESCAPE);
+ link_width_cntl |= lanes | LC_RECONFIG_NOW |
+ LC_RENEGOTIATE_EN | LC_UPCONFIGURE_SUPPORT;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ } else {
+ link_width_cntl |= LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ }
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ if ((speed_cntl & LC_OTHER_SIDE_EVER_SENT_GEN2) &&
+ (speed_cntl & LC_OTHER_SIDE_SUPPORTS_GEN2)) {
+
+ tmp = RREG32(0x541c);
+ WREG32(0x541c, tmp | 0x8);
+ WREG32(MM_CFGREGS_CNTL, MM_WR_TO_CFG_EN);
+ link_cntl2 = RREG16(0x4088);
+ link_cntl2 &= ~TARGET_LINK_SPEED_MASK;
+ link_cntl2 |= 0x2;
+ WREG16(0x4088, link_cntl2);
+ WREG32(MM_CFGREGS_CNTL, 0);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl &= ~LC_TARGET_LINK_SPEED_OVERRIDE_EN;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl |= LC_CLR_FAILED_SPD_CHANGE_CNT;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl &= ~LC_CLR_FAILED_SPD_CHANGE_CNT;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ speed_cntl |= LC_GEN2_EN_STRAP;
+ WREG32_PCIE_P(PCIE_LC_SPEED_CNTL, speed_cntl);
+
+ } else {
+ link_width_cntl = RREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL);
+ /* XXX: only disable it if gen1 bridge vendor == 0x111d or
0x1106 */
+ if (1)
+ link_width_cntl |= LC_UPCONFIGURE_DIS;
+ else
+ link_width_cntl &= ~LC_UPCONFIGURE_DIS;
+ WREG32_PCIE_P(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
+ }
+}
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index fc77e1e..abc8cf5 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -360,4 +360,42 @@
#define D1GRPH_SECONDARY_SURFACE_ADDRESS_HIGH 0x691c
#define D2GRPH_SECONDARY_SURFACE_ADDRESS_HIGH 0x611c
+/* PCIE link stuff */
+#define PCIE_LC_TRAINING_CNTL 0xa1 /* PCIE_P */
+#define PCIE_LC_LINK_WIDTH_CNTL 0xa2 /* PCIE_P */
+# define LC_LINK_WIDTH_SHIFT 0
+# define LC_LINK_WIDTH_MASK 0x7
+# define LC_LINK_WIDTH_X0 0
+# define LC_LINK_WIDTH_X1 1
+# define LC_LINK_WIDTH_X2 2
+# define LC_LINK_WIDTH_X4 3
+# define LC_LINK_WIDTH_X8 4
+# define LC_LINK_WIDTH_X16 6
+# define LC_LINK_WIDTH_RD_SHIFT 4
+# define LC_LINK_WIDTH_RD_MASK 0x70
+# define LC_RECONFIG_ARC_MISSING_ESCAPE (1 << 7)
+# define LC_RECONFIG_NOW (1 << 8)
+# define LC_RENEGOTIATION_SUPPORT (1 << 9)
+# define LC_RENEGOTIATE_EN (1 << 10)
+# define LC_SHORT_RECONFIG_EN (1 << 11)
+# define LC_UPCONFIGURE_SUPPORT (1 << 12)
+# define LC_UPCONFIGURE_DIS (1 << 13)
+#define PCIE_LC_SPEED_CNTL 0xa4 /* PCIE_P */
+# define LC_GEN2_EN_STRAP (1 << 0)
+# define LC_TARGET_LINK_SPEED_OVERRIDE_EN (1 << 1)
+# define LC_FORCE_EN_HW_SPEED_CHANGE (1 << 5)
+# define LC_FORCE_DIS_HW_SPEED_CHANGE (1 << 6)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK (0x3 << 8)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT 3
+# define LC_CURRENT_DATA_RATE (1 << 11)
+# define LC_VOLTAGE_TIMER_SEL_MASK (0xf << 14)
+# define LC_CLR_FAILED_SPD_CHANGE_CNT (1 << 21)
+# define LC_OTHER_SIDE_EVER_SENT_GEN2 (1 << 23)
+# define LC_OTHER_SIDE_SUPPORTS_GEN2 (1 << 24)
+#define MM_CFGREGS_CNTL 0x544c
+# define MM_WR_TO_CFG_EN (1 << 3)
+#define LINK_CNTL2 0x88 /* F0 */
+# define TARGET_LINK_SPEED_MASK (0xf << 0)
+# define SELECTABLE_DEEMPHASIS (1 << 6)
+
#endif
--
1.7.1.1
