From: Yisen Zhuang <Yisen.Zhuang@huawei.com>
To: <rjw@rjwysocki.net>, <lenb@kernel.org>, <davem@davemloft.net>
Cc: <fengguang.wu@intel.com>, <andriy.shevchenko@linux.intel.com>,
<andrew@lunn.ch>, <ivecera@redhat.com>, <f.fainelli@gmail.com>,
<haifeng.wei@huawei.com>, <charles.chenxin@huawei.com>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-acpi@vger.kernel.org>, <linuxarm@huawei.com>
Subject: [PATCH v4 net-next 04/13] net: hisilicon: add support of acpi for hns-mdio
Date: Fri, 3 Jun 2016 10:55:12 +0800 [thread overview]
Message-ID: <1464922521-30928-5-git-send-email-Yisen.Zhuang@huawei.com> (raw)
In-Reply-To: <1464922521-30928-1-git-send-email-Yisen.Zhuang@huawei.com>
From: Kejian Yan <yankejian@huawei.com>
hns-mdio needs to register itself to mii-bus. The info of the device can
be read by both DT and ACPI.
HNS tries to call Linux PHY driver to help access PHY-devices, the HNS
hardware topology is as below. The MDIO controller may control several
PHY-devices, and each PHY-device connects to a MAC device. The MDIO will
be registered to mdiobus, then PHY-devices will register when each mac
find PHY device.
cpu
|
|
-------------------------------------------
| | |
| | |
| dsaf |
MDIO | MDIO
| --------------------------- |
| | | | | |
| | | | | |
| MAC MAC MAC MAC |
| | | | | |
---- |-------- |-------- | | --------
|| || || ||
PHY PHY PHY PHY
And the driver can handle reset sequence by _RST method in DSDT in ACPI
case.
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
---
change log:
v2:
1. use dev_of_node instead of IS_ENABLED macro
2. Add ACPI bits
v1: first submit
Link: https://lkml.org/lkml/2016/5/13/93
---
drivers/net/ethernet/hisilicon/hns_mdio.c | 106 +++++++++++++++++++-----------
1 file changed, 69 insertions(+), 37 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns_mdio.c b/drivers/net/ethernet/hisilicon/hns_mdio.c
index 297edc4..761a32f 100644
--- a/drivers/net/ethernet/hisilicon/hns_mdio.c
+++ b/drivers/net/ethernet/hisilicon/hns_mdio.c
@@ -7,6 +7,7 @@
* (at your option) any later version.
*/
+#include <linux/acpi.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
@@ -354,48 +355,60 @@ static int hns_mdio_reset(struct mii_bus *bus)
struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
int ret;
- if (!dev_of_node(bus->parent))
- return -ENOTSUPP;
+ if (dev_of_node(bus->parent)) {
+ if (!mdio_dev->subctrl_vbase) {
+ dev_err(&bus->dev, "mdio sys ctl reg has not maped\n");
+ return -ENODEV;
+ }
- if (!mdio_dev->subctrl_vbase) {
- dev_err(&bus->dev, "mdio sys ctl reg has not maped\n");
- return -ENODEV;
- }
+ /* 1. reset req, and read reset st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_RESET_REQ, 0x1,
+ MDIO_SC_RESET_ST, 0x1,
+ MDIO_CHECK_SET_ST);
+ if (ret) {
+ dev_err(&bus->dev, "MDIO reset fail\n");
+ return ret;
+ }
- /*1. reset req, and read reset st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_RESET_REQ, 0x1,
- MDIO_SC_RESET_ST, 0x1,
- MDIO_CHECK_SET_ST);
- if (ret) {
- dev_err(&bus->dev, "MDIO reset fail\n");
- return ret;
- }
+ /* 2. dis clk, and read clk st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_CLK_DIS,
+ 0x1, MDIO_SC_CLK_ST, 0x1,
+ MDIO_CHECK_CLR_ST);
+ if (ret) {
+ dev_err(&bus->dev, "MDIO dis clk fail\n");
+ return ret;
+ }
- /*2. dis clk, and read clk st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_CLK_DIS,
- 0x1, MDIO_SC_CLK_ST, 0x1,
- MDIO_CHECK_CLR_ST);
- if (ret) {
- dev_err(&bus->dev, "MDIO dis clk fail\n");
- return ret;
- }
+ /* 3. reset dreq, and read reset st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_RESET_DREQ, 0x1,
+ MDIO_SC_RESET_ST, 0x1,
+ MDIO_CHECK_CLR_ST);
+ if (ret) {
+ dev_err(&bus->dev, "MDIO dis clk fail\n");
+ return ret;
+ }
- /*3. reset dreq, and read reset st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_RESET_DREQ, 0x1,
- MDIO_SC_RESET_ST, 0x1,
- MDIO_CHECK_CLR_ST);
- if (ret) {
- dev_err(&bus->dev, "MDIO dis clk fail\n");
- return ret;
+ /* 4. en clk, and read clk st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_CLK_EN,
+ 0x1, MDIO_SC_CLK_ST, 0x1,
+ MDIO_CHECK_SET_ST);
+ if (ret)
+ dev_err(&bus->dev, "MDIO en clk fail\n");
+ } else if (is_acpi_node(bus->parent->fwnode)) {
+ acpi_status s;
+
+ s = acpi_evaluate_object(ACPI_HANDLE(bus->parent),
+ "_RST", NULL, NULL);
+ if (ACPI_FAILURE(s)) {
+ dev_err(&bus->dev, "Reset failed, return:%#x\n", s);
+ ret = -EBUSY;
+ } else {
+ ret = 0;
+ }
+ } else {
+ dev_err(&bus->dev, "Can not get cfg data from DT or ACPI\n");
+ ret = -ENXIO;
}
-
- /*4. en clk, and read clk st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_CLK_EN,
- 0x1, MDIO_SC_CLK_ST, 0x1,
- MDIO_CHECK_SET_ST);
- if (ret)
- dev_err(&bus->dev, "MDIO en clk fail\n");
-
return ret;
}
@@ -453,6 +466,18 @@ static int hns_mdio_probe(struct platform_device *pdev)
mdio_dev->subctrl_vbase = NULL;
}
ret = of_mdiobus_register(new_bus, pdev->dev.of_node);
+ } else if (is_acpi_node(pdev->dev.fwnode)) {
+ /* Clear all the IRQ properties */
+ memset(new_bus->irq, PHY_POLL, 4 * PHY_MAX_ADDR);
+
+ /* Mask out all PHYs from auto probing. */
+ new_bus->phy_mask = ~0;
+
+ /* Register the MDIO bus */
+ ret = mdiobus_register(new_bus);
+ } else {
+ dev_err(&pdev->dev, "Can not get cfg data from DT or ACPI\n");
+ ret = -ENXIO;
}
if (ret) {
@@ -487,12 +512,19 @@ static const struct of_device_id hns_mdio_match[] = {
{}
};
+static const struct acpi_device_id hns_mdio_acpi_match[] = {
+ { "HISI0141", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, hns_mdio_acpi_match);
+
static struct platform_driver hns_mdio_driver = {
.probe = hns_mdio_probe,
.remove = hns_mdio_remove,
.driver = {
.name = MDIO_DRV_NAME,
.of_match_table = hns_mdio_match,
+ .acpi_match_table = ACPI_PTR(hns_mdio_acpi_match),
},
};
--
1.9.1
next prev parent reply other threads:[~2016-06-03 2:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-03 2:55 [PATCH v4 net-next 00/13] net: hns: add support of ACPI Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 01/13] ACPI: bus: add stub acpi_dev_found() to linux/acpi.h Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 02/13] ACPI: bus: add stub acpi_evaluate_dsm() " Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 03/13] net: hisilicon: cleanup to prepare for other cases Yisen Zhuang
2016-06-03 2:55 ` Yisen Zhuang [this message]
2016-06-03 2:55 ` [PATCH v4 net-next 05/13] net: hns: use device_* APIs instead of of_* APIs Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 06/13] net: hns: use platform_get_irq instead of irq_of_parse_and_map Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 07/13] net: hns: enet specify a reference to dsaf by fwnode_handle Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 08/13] net: hns: add uniform interface for phy connection Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 09/13] net: hns: add dsaf misc operation method Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 10/13] net: hns: dsaf adds support of acpi Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 11/13] net: hns: register phy device in each mac initial sequence Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 12/13] net: hns: implement the miscellaneous operation by asl Yisen Zhuang
2016-06-03 2:55 ` [PATCH v4 net-next 13/13] net: hns: net: hns: enet adds support of acpi Yisen Zhuang
2016-06-03 21:34 ` [PATCH v4 net-next 00/13] net: hns: add support of ACPI Rafael J. Wysocki
2016-06-03 23:49 ` David Miller
2016-06-05 2:13 ` David Miller
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