[PATCH v5 06/10] PCI: rockchip: Split out common function to init controller
Shawn Lin
shawn.lin at rock-chips.com
Sun Apr 1 18:03:26 PDT 2018
Most of the operations are used for both of host and EP driver,
so this patch spilt them out to a new function, rockchip_pcie_init_port
in pcie-rockchip.c and rename the original function to
rockchip_pcie_host_init_port to avoid confusion. No functional
changed intended.
Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
Tested-by: Jeffy Chen <jeffy.chen at rock-chips.com>
---
drivers/pci/controller/pcie-rockchip-host.c | 131 ++-----------------------
drivers/pci/controller/pcie-rockchip.c | 142 ++++++++++++++++++++++++++++
drivers/pci/controller/pcie-rockchip.h | 3 +
3 files changed, 152 insertions(+), 124 deletions(-)
diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
index c01fdde..7a0c7b9 100644
--- a/drivers/pci/controller/pcie-rockchip-host.c
+++ b/drivers/pci/controller/pcie-rockchip-host.c
@@ -296,134 +296,17 @@ static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
* rockchip_pcie_init_port - Initialize hardware
* @rockchip: PCIe port information
*/
-static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
+static int rockchip_pcie_host_init_port(struct rockchip_pcie *rockchip)
{
struct device *dev = rockchip->dev;
- int err, i;
+ int err, i = MAX_LANE_NUM;
u32 status;
gpiod_set_value_cansleep(rockchip->ep_gpio, 0);
- err = reset_control_assert(rockchip->aclk_rst);
- if (err) {
- dev_err(dev, "assert aclk_rst err %d\n", err);
- return err;
- }
-
- err = reset_control_assert(rockchip->pclk_rst);
- if (err) {
- dev_err(dev, "assert pclk_rst err %d\n", err);
- return err;
- }
-
- err = reset_control_assert(rockchip->pm_rst);
- if (err) {
- dev_err(dev, "assert pm_rst err %d\n", err);
+ err = rockchip_pcie_init_port(rockchip);
+ if (err)
return err;
- }
-
- for (i = 0; i < MAX_LANE_NUM; i++) {
- err = phy_init(rockchip->phys[i]);
- if (err) {
- dev_err(dev, "init phy%d err %d\n", i, err);
- goto err_exit_phy;
- }
- }
-
- err = reset_control_assert(rockchip->core_rst);
- if (err) {
- dev_err(dev, "assert core_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- err = reset_control_assert(rockchip->mgmt_rst);
- if (err) {
- dev_err(dev, "assert mgmt_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- err = reset_control_assert(rockchip->mgmt_sticky_rst);
- if (err) {
- dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- err = reset_control_assert(rockchip->pipe_rst);
- if (err) {
- dev_err(dev, "assert pipe_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- udelay(10);
-
- err = reset_control_deassert(rockchip->pm_rst);
- if (err) {
- dev_err(dev, "deassert pm_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- err = reset_control_deassert(rockchip->aclk_rst);
- if (err) {
- dev_err(dev, "deassert aclk_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- err = reset_control_deassert(rockchip->pclk_rst);
- if (err) {
- dev_err(dev, "deassert pclk_rst err %d\n", err);
- goto err_exit_phy;
- }
-
- if (rockchip->link_gen == 2)
- rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
- PCIE_CLIENT_CONFIG);
- else
- rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
- PCIE_CLIENT_CONFIG);
-
- rockchip_pcie_write(rockchip,
- 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_CONFIG);
-
- for (i = 0; i < MAX_LANE_NUM; i++) {
- err = phy_power_on(rockchip->phys[i]);
- if (err) {
- dev_err(dev, "power on phy%d err %d\n", i, err);
- goto err_power_off_phy;
- }
- }
-
- /*
- * Please don't reorder the deassert sequence of the following
- * four reset pins.
- */
- err = reset_control_deassert(rockchip->mgmt_sticky_rst);
- if (err) {
- dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
- goto err_power_off_phy;
- }
-
- err = reset_control_deassert(rockchip->core_rst);
- if (err) {
- dev_err(dev, "deassert core_rst err %d\n", err);
- goto err_power_off_phy;
- }
-
- err = reset_control_deassert(rockchip->mgmt_rst);
- if (err) {
- dev_err(dev, "deassert mgmt_rst err %d\n", err);
- goto err_power_off_phy;
- }
-
- err = reset_control_deassert(rockchip->pipe_rst);
- if (err) {
- dev_err(dev, "deassert pipe_rst err %d\n", err);
- goto err_power_off_phy;
- }
/* Fix the transmitted FTS count desired to exit from L0s. */
status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
@@ -516,8 +399,8 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
err_power_off_phy:
while (i--)
phy_power_off(rockchip->phys[i]);
+
i = MAX_LANE_NUM;
-err_exit_phy:
while (i--)
phy_exit(rockchip->phys[i]);
return err;
@@ -1036,7 +919,7 @@ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
if (err)
goto err_disable_0v9;
- err = rockchip_pcie_init_port(rockchip);
+ err = rockchip_pcie_host_init_port(rockchip);
if (err)
goto err_pcie_resume;
@@ -1101,7 +984,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
goto err_set_vpcie;
}
- err = rockchip_pcie_init_port(rockchip);
+ err = rockchip_pcie_host_init_port(rockchip);
if (err)
goto err_vpcie;
diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
index bcc222b..e2ed10f 100644
--- a/drivers/pci/controller/pcie-rockchip.c
+++ b/drivers/pci/controller/pcie-rockchip.c
@@ -12,6 +12,7 @@
*/
#include <linux/clk.h>
+#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/of_pci.h>
#include <linux/phy/phy.h>
@@ -145,6 +146,147 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
}
EXPORT_SYMBOL_GPL(rockchip_pcie_parse_dt);
+int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
+{
+ struct device *dev = rockchip->dev;
+ int err, i;
+ u32 regs;
+
+ err = reset_control_assert(rockchip->aclk_rst);
+ if (err) {
+ dev_err(dev, "assert aclk_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_assert(rockchip->pclk_rst);
+ if (err) {
+ dev_err(dev, "assert pclk_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_assert(rockchip->pm_rst);
+ if (err) {
+ dev_err(dev, "assert pm_rst err %d\n", err);
+ return err;
+ }
+
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ err = phy_init(rockchip->phys[i]);
+ if (err) {
+ dev_err(dev, "init phy%d err %d\n", i, err);
+ goto err_exit_phy;
+ }
+ }
+
+ err = reset_control_assert(rockchip->core_rst);
+ if (err) {
+ dev_err(dev, "assert core_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ err = reset_control_assert(rockchip->mgmt_rst);
+ if (err) {
+ dev_err(dev, "assert mgmt_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ err = reset_control_assert(rockchip->mgmt_sticky_rst);
+ if (err) {
+ dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ err = reset_control_assert(rockchip->pipe_rst);
+ if (err) {
+ dev_err(dev, "assert pipe_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ udelay(10);
+
+ err = reset_control_deassert(rockchip->pm_rst);
+ if (err) {
+ dev_err(dev, "deassert pm_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ err = reset_control_deassert(rockchip->aclk_rst);
+ if (err) {
+ dev_err(dev, "deassert aclk_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ err = reset_control_deassert(rockchip->pclk_rst);
+ if (err) {
+ dev_err(dev, "deassert pclk_rst err %d\n", err);
+ goto err_exit_phy;
+ }
+
+ if (rockchip->link_gen == 2)
+ rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
+ PCIE_CLIENT_CONFIG);
+ else
+ rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
+ PCIE_CLIENT_CONFIG);
+
+ regs = PCIE_CLIENT_LINK_TRAIN_ENABLE | PCIE_CLIENT_ARI_ENABLE |
+ PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes);
+
+ if (rockchip->is_rc)
+ regs |= PCIE_CLIENT_CONF_ENABLE | PCIE_CLIENT_MODE_RC;
+ else
+ regs |= PCIE_CLIENT_CONF_DISABLE | PCIE_CLIENT_MODE_EP;
+
+ rockchip_pcie_write(rockchip, regs, PCIE_CLIENT_CONFIG);
+
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ err = phy_power_on(rockchip->phys[i]);
+ if (err) {
+ dev_err(dev, "power on phy%d err %d\n", i, err);
+ goto err_power_off_phy;
+ }
+ }
+
+ /*
+ * Please don't reorder the deassert sequence of the following
+ * four reset pins.
+ */
+ err = reset_control_deassert(rockchip->mgmt_sticky_rst);
+ if (err) {
+ dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
+ goto err_power_off_phy;
+ }
+
+ err = reset_control_deassert(rockchip->core_rst);
+ if (err) {
+ dev_err(dev, "deassert core_rst err %d\n", err);
+ goto err_power_off_phy;
+ }
+
+ err = reset_control_deassert(rockchip->mgmt_rst);
+ if (err) {
+ dev_err(dev, "deassert mgmt_rst err %d\n", err);
+ goto err_power_off_phy;
+ }
+
+ err = reset_control_deassert(rockchip->pipe_rst);
+ if (err) {
+ dev_err(dev, "deassert pipe_rst err %d\n", err);
+ goto err_power_off_phy;
+ }
+
+ return 0;
+err_power_off_phy:
+ while (i--)
+ phy_power_off(rockchip->phys[i]);
+ i = MAX_LANE_NUM;
+err_exit_phy:
+ while (i--)
+ phy_exit(rockchip->phys[i]);
+ return err;
+}
+EXPORT_SYMBOL_GPL(rockchip_pcie_init_port);
+
int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip)
{
struct device *dev = rockchip->dev;
diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h
index 473e74f..ebb89d5 100644
--- a/drivers/pci/controller/pcie-rockchip.h
+++ b/drivers/pci/controller/pcie-rockchip.h
@@ -27,10 +27,12 @@
#define PCIE_CLIENT_BASE 0x0
#define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
#define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001)
+#define PCIE_CLIENT_CONF_DISABLE HIWORD_UPDATE(0x0001, 0)
#define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002)
#define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008)
#define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
#define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)
+#define PCIE_CLIENT_MODE_EP HIWORD_UPDATE(0x0040, 0)
#define PCIE_CLIENT_GEN_SEL_1 HIWORD_UPDATE(0x0080, 0)
#define PCIE_CLIENT_GEN_SEL_2 HIWORD_UPDATE_BIT(0x0080)
#define PCIE_CLIENT_DEBUG_OUT_0 (PCIE_CLIENT_BASE + 0x3c)
@@ -237,6 +239,7 @@ static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
}
int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip);
+int rockchip_pcie_init_port(struct rockchip_pcie *rockchip);
int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip);
void rockchip_pcie_deinit_phys(struct rockchip_pcie *rockchip);
int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip);
--
1.9.1
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