drivers/phy/hisilicon/phy-hisi-inno-usb2.c
Source file repositories/reference/linux-study-clean/drivers/phy/hisilicon/phy-hisi-inno-usb2.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/phy/hisilicon/phy-hisi-inno-usb2.c- Extension
.c- Size
- 5490 bytes
- Lines
- 215
- Domain
- Driver Families
- Bucket
- drivers/phy
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/clk.hlinux/delay.hlinux/io.hlinux/module.hlinux/of.hlinux/phy/phy.hlinux/platform_device.hlinux/reset.h
Detected Declarations
struct hisi_inno_phy_portstruct hisi_inno_phy_privfunction hisi_inno_phy_write_regfunction hisi_inno_phy_setupfunction hisi_inno_phy_initfunction hisi_inno_phy_exitfunction hisi_inno_phy_probefunction for_each_child_of_node_scoped
Annotated Snippet
struct hisi_inno_phy_port {
struct reset_control *utmi_rst;
struct hisi_inno_phy_priv *priv;
};
struct hisi_inno_phy_priv {
void __iomem *mmio;
struct clk *ref_clk;
struct reset_control *por_rst;
unsigned int type;
struct hisi_inno_phy_port ports[INNO_PHY_PORT_NUM];
};
static void hisi_inno_phy_write_reg(struct hisi_inno_phy_priv *priv,
u8 port, u32 addr, u32 data)
{
void __iomem *reg = priv->mmio;
u32 val;
u32 value;
if (priv->type == PHY_TYPE_0)
val = (data & PHY_TEST_DATA) |
((addr << PHY_TEST_ADDR_OFFSET) & PHY0_TEST_ADDR) |
((port << PHY0_TEST_PORT_OFFSET) & PHY0_TEST_PORT) |
PHY0_TEST_WREN | PHY0_TEST_RST;
else
val = (data & PHY_TEST_DATA) |
((addr << PHY_TEST_ADDR_OFFSET) & PHY1_TEST_ADDR) |
((port << PHY1_TEST_PORT_OFFSET) & PHY1_TEST_PORT) |
PHY1_TEST_WREN | PHY1_TEST_RST;
writel(val, reg);
value = val;
if (priv->type == PHY_TYPE_0)
value |= PHY0_TEST_CLK;
else
value |= PHY1_TEST_CLK;
writel(value, reg);
writel(val, reg);
}
static void hisi_inno_phy_setup(struct hisi_inno_phy_priv *priv)
{
/* The phy clk is controlled by the port0 register 0x06. */
hisi_inno_phy_write_reg(priv, 0, 0x06, PHY_CLK_ENABLE);
msleep(PHY_CLK_STABLE_TIME);
}
static int hisi_inno_phy_init(struct phy *phy)
{
struct hisi_inno_phy_port *port = phy_get_drvdata(phy);
struct hisi_inno_phy_priv *priv = port->priv;
int ret;
ret = clk_prepare_enable(priv->ref_clk);
if (ret)
return ret;
udelay(REF_CLK_STABLE_TIME);
reset_control_deassert(priv->por_rst);
udelay(POR_RST_COMPLETE_TIME);
/* Set up phy registers */
hisi_inno_phy_setup(priv);
reset_control_deassert(port->utmi_rst);
udelay(UTMI_RST_COMPLETE_TIME);
return 0;
}
static int hisi_inno_phy_exit(struct phy *phy)
{
struct hisi_inno_phy_port *port = phy_get_drvdata(phy);
struct hisi_inno_phy_priv *priv = port->priv;
reset_control_assert(port->utmi_rst);
reset_control_assert(priv->por_rst);
clk_disable_unprepare(priv->ref_clk);
return 0;
}
static const struct phy_ops hisi_inno_phy_ops = {
.init = hisi_inno_phy_init,
.exit = hisi_inno_phy_exit,
.owner = THIS_MODULE,
};
Annotation
- Immediate include surface: `linux/clk.h`, `linux/delay.h`, `linux/io.h`, `linux/module.h`, `linux/of.h`, `linux/phy/phy.h`, `linux/platform_device.h`, `linux/reset.h`.
- Detected declarations: `struct hisi_inno_phy_port`, `struct hisi_inno_phy_priv`, `function hisi_inno_phy_write_reg`, `function hisi_inno_phy_setup`, `function hisi_inno_phy_init`, `function hisi_inno_phy_exit`, `function hisi_inno_phy_probe`, `function for_each_child_of_node_scoped`.
- Atlas domain: Driver Families / drivers/phy.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.