From: Bjorn Helgaas <bhelgaas@google.com>
To: Shawn Lin <shawn.lin@rock-chips.com>
Cc: devicetree@vger.kernel.org, Wenrui Li <wenrui.li@rock-chips.com>,
Heiko Stuebner <heiko@sntech.de>, Arnd Bergmann <arnd@arndb.de>,
Marc Zyngier <marc.zyngier@arm.com>,
linux-pci@vger.kernel.org,
Brian Norris <briannorris@chromium.org>,
linux-kernel@vger.kernel.org,
Doug Anderson <dianders@chromium.org>,
linux-rockchip@lists.infradead.org,
Rob Herring <robh+dt@kernel.org>,
Guenter Roeck <linux@roeck-us.net>
Subject: [PATCH 7/9] Simplify the confusing HIWORD_UPDATE scheme.
Date: Thu, 01 Sep 2016 11:44:51 -0500 [thread overview]
Message-ID: <20160901164451.14195.61057.stgit@bhelgaas-glaptop2.roam.corp.google.com> (raw)
In-Reply-To: <20160901163758.14195.15725.stgit@bhelgaas-glaptop2.roam.corp.google.com>
---
drivers/pci/host/pcie-rockchip.c | 69 +++++++++++++-------------------------
1 file changed, 23 insertions(+), 46 deletions(-)
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
index 33bf2e1..7f6fe7d 100644
--- a/drivers/pci/host/pcie-rockchip.c
+++ b/drivers/pci/host/pcie-rockchip.c
@@ -115,36 +115,25 @@
(PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
-/*
- * The higher 16-bit of this register is used for write protection
- * only if BIT(x + 16) set to 1 the BIT(x) can be written.
- */
-#define HIWORD_UPDATE(val, mask, shift) \
- ((val) << (shift) | (mask) << ((shift) + 16))
-
#define RC_REGION_0_ADDR_TRANS_H 0x00000000
#define RC_REGION_0_ADDR_TRANS_L 0x00000000
#define RC_REGION_0_PASS_BITS (25 - 1)
#define MAX_AXI_WRAPPER_REGION_NUM 33
#define PCIE_CORE_LCSR_RETRAIN_LINK BIT(5)
-#define PCIE_CLIENT_CONF_ENABLE BIT(0)
-#define PCIE_CLIENT_CONF_ENABLE_SHIFT 0
-#define PCIE_CLIENT_CONF_ENABLE_MASK 0x1
-#define PCIE_CLIENT_LINK_TRAIN_ENABLE 1
-#define PCIE_CLIENT_LINK_TRAIN_SHIFT 1
-#define PCIE_CLIENT_LINK_TRAIN_MASK 0x1
-#define PCIE_CLIENT_ARI_ENABLE BIT(0)
-#define PCIE_CLIENT_ARI_ENABLE_SHIFT 3
-#define PCIE_CLIENT_ARI_ENABLE_MASK 0x1
-#define PCIE_CLIENT_CONF_LANE_NUM(x) (x / 2)
-#define PCIE_CLIENT_CONF_LANE_NUM_SHIFT 4
-#define PCIE_CLIENT_CONF_LANE_NUM_MASK 0x3
-#define PCIE_CLIENT_MODE_RC BIT(0)
-#define PCIE_CLIENT_MODE_SHIFT 6
-#define PCIE_CLIENT_MODE_MASK 0x1
-#define PCIE_CLIENT_GEN_SEL_2 1
-#define PCIE_CLIENT_GEN_SEL_SHIFT 7
-#define PCIE_CLIENT_GEN_SEL_MASK 0x1
+
+/*
+ * The higher 16-bit of this register is used for write protection
+ * only if BIT(x + 16) set to 1 the BIT(x) can be written.
+ */
+#define PCIE_CLIENT_CONF_ENABLE (0x00010000 | 0x0001)
+#define PCIE_CLIENT_LINK_TRAIN_ENABLE (0x00020000 | 0x0002)
+#define PCIE_CLIENT_ARI_ENABLE (0x00080000 | 0x0008)
+#define PCIE_CLIENT_CONF_LANE_NUM(x) (0x00300000 | (((x >> 1) & 3) << 4)
+#define PCIE_CLIENT_MODE_RC (0x00400000 | 0x0040)
+#define PCIE_CLIENT_GEN_SEL(x) (0x00800000 | ((x & 1) << 7)
+#define PCIE_CLIENT_GEN_SEL_0 0
+#define PCIE_CLIENT_GEN_SEL_2 1
+
#define PCIE_CLIENT_LINK_STATUS_UP 0x3
#define PCIE_CLIENT_LINK_STATUS_SHIFT 20
#define PCIE_CLIENT_LINK_STATUS_MASK 0x3
@@ -423,22 +412,13 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
}
rockchip_pcie_write(rockchip,
- HIWORD_UPDATE(PCIE_CLIENT_CONF_ENABLE,
- PCIE_CLIENT_CONF_ENABLE_MASK,
- PCIE_CLIENT_CONF_ENABLE_SHIFT) |
- HIWORD_UPDATE(PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes),
- PCIE_CLIENT_CONF_LANE_NUM_MASK,
- PCIE_CLIENT_CONF_LANE_NUM_SHIFT) |
- HIWORD_UPDATE(PCIE_CLIENT_MODE_RC,
- PCIE_CLIENT_MODE_MASK,
- PCIE_CLIENT_MODE_SHIFT) |
- HIWORD_UPDATE(PCIE_CLIENT_ARI_ENABLE,
- PCIE_CLIENT_ARI_ENABLE_MASK,
- PCIE_CLIENT_ARI_ENABLE_SHIFT) |
- HIWORD_UPDATE(PCIE_CLIENT_GEN_SEL_2,
- PCIE_CLIENT_GEN_SEL_MASK,
- PCIE_CLIENT_GEN_SEL_SHIFT),
- PCIE_CLIENT_BASE);
+ PCIE_CLIENT_CONF_ENABLE |
+ PCIE_CLIENT_LINK_TRAIN_ENABLE |
+ PCIE_CLIENT_ARI_ENABLE |
+ PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes) |
+ PCIE_CLIENT_MODE_RC |
+ PCIE_CLIENT_GEN_SEL(PCIE_CLIENT_GEN_SEL_2),
+ PCIE_CLIENT_BASE);
err = phy_power_on(rockchip->phy);
if (err) {
@@ -482,11 +462,8 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2);
/* Enable Gen1 training */
- rockchip_pcie_write(rockchip,
- HIWORD_UPDATE(PCIE_CLIENT_LINK_TRAIN_ENABLE,
- PCIE_CLIENT_LINK_TRAIN_MASK,
- PCIE_CLIENT_LINK_TRAIN_SHIFT),
- PCIE_CLIENT_BASE);
+ rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
+ PCIE_CLIENT_BASE);
gpiod_set_value(rockchip->ep_gpio, 1);
next prev parent reply other threads:[~2016-09-01 16:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-01 16:43 [PATCH 0/9] PCI: rockchip: Cleanups against v10 Bjorn Helgaas
2016-09-01 16:44 ` [PATCH 1/9] Remove unused symbols, unnecessary parens, other minor comments from Bjorn Helgaas
2016-09-01 16:44 ` [PATCH 2/9] Rename pcie_read() and pcie_write() to rockchip_pcie_read() and Bjorn Helgaas
2016-09-01 16:44 ` [PATCH 3/9] Always use "rockchip" as the pointer to per-device struct Bjorn Helgaas
2016-09-01 16:44 ` [PATCH 4/9] Rename struct rockchip_pcie_port to struct rockchip_pcie Bjorn Helgaas
2016-09-01 16:44 ` [PATCH 5/9] Use a local "dev" to avoid repetition of "rockchip->dev" Bjorn Helgaas
2016-09-01 16:44 ` [PATCH 6/9] Add comment about why 32-bit read/modify/write isn't safe Bjorn Helgaas
2016-09-01 16:44 ` Bjorn Helgaas [this message]
2016-09-01 16:44 ` [PATCH 8/9] Simplify testing of link status and speed testing Bjorn Helgaas
2016-09-01 16:45 ` [PATCH 9/9] Move msleeps to address Guenter's comments Bjorn Helgaas
2016-09-01 20:52 ` [PATCH 0/9] PCI: rockchip: Cleanups against v10 Arnd Bergmann
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