drivers/mmc/host/sdhci-pltfm.h
Source file repositories/reference/linux-study-clean/drivers/mmc/host/sdhci-pltfm.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/mmc/host/sdhci-pltfm.h- Extension
.h- Size
- 3205 bytes
- Lines
- 123
- Domain
- Driver Families
- Bucket
- drivers/mmc
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/clk.hlinux/platform_device.hsdhci.h
Detected Declarations
struct sdhci_pltfm_datastruct sdhci_pltfm_hostfunction sdhci_be32bs_readlfunction sdhci_be32bs_readwfunction sdhci_be32bs_readbfunction sdhci_be32bs_writelfunction sdhci_be32bs_writewfunction sdhci_be32bs_writebfunction sdhci_get_of_propertyfunction sdhci_pltfm_suspendfunction sdhci_pltfm_resume
Annotated Snippet
struct sdhci_pltfm_data {
const struct sdhci_ops *ops;
unsigned int quirks;
unsigned int quirks2;
};
struct sdhci_pltfm_host {
struct clk *clk;
/* migrate from sdhci_of_host */
unsigned int clock;
u16 xfer_mode_shadow;
unsigned long private[] ____cacheline_aligned;
};
#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
/*
* These accessors are designed for big endian hosts doing I/O to
* little endian controllers incorporating a 32-bit hardware byte swapper.
*/
static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
{
return in_be32(host->ioaddr + reg);
}
static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
{
return in_be16(host->ioaddr + (reg ^ 0x2));
}
static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
{
return in_8(host->ioaddr + (reg ^ 0x3));
}
static inline void sdhci_be32bs_writel(struct sdhci_host *host,
u32 val, int reg)
{
out_be32(host->ioaddr + reg, val);
}
static inline void sdhci_be32bs_writew(struct sdhci_host *host,
u16 val, int reg)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
int base = reg & ~0x3;
int shift = (reg & 0x2) * 8;
switch (reg) {
case SDHCI_TRANSFER_MODE:
/*
* Postpone this write, we must do it together with a
* command write that is down below.
*/
pltfm_host->xfer_mode_shadow = val;
return;
case SDHCI_COMMAND:
sdhci_be32bs_writel(host,
val << 16 | pltfm_host->xfer_mode_shadow,
SDHCI_TRANSFER_MODE);
return;
}
clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
}
static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
{
int base = reg & ~0x3;
int shift = (reg & 0x3) * 8;
clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
}
#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
void sdhci_get_property(struct platform_device *pdev);
static inline void sdhci_get_of_property(struct platform_device *pdev)
{
return sdhci_get_property(pdev);
}
extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
const struct sdhci_pltfm_data *pdata,
size_t priv_size);
extern int sdhci_pltfm_init_and_add_host(struct platform_device *pdev,
const struct sdhci_pltfm_data *pdata,
size_t priv_size);
extern void sdhci_pltfm_remove(struct platform_device *pdev);
Annotation
- Immediate include surface: `linux/clk.h`, `linux/platform_device.h`, `sdhci.h`.
- Detected declarations: `struct sdhci_pltfm_data`, `struct sdhci_pltfm_host`, `function sdhci_be32bs_readl`, `function sdhci_be32bs_readw`, `function sdhci_be32bs_readb`, `function sdhci_be32bs_writel`, `function sdhci_be32bs_writew`, `function sdhci_be32bs_writeb`, `function sdhci_get_of_property`, `function sdhci_pltfm_suspend`.
- Atlas domain: Driver Families / drivers/mmc.
- 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.