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/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*/
#ifndef LINUX_MMC_CQHCI_H
#define LINUX_MMC_CQHCI_H
#include <linux/compiler.h>
#include <linux/bitops.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>
#include <linux/completion.h>
#include <linux/wait.h>
#include <linux/irqreturn.h>
#include <asm/io.h>
/* registers */
/* version */
#define CQHCI_VER 0x00
#define CQHCI_VER_MAJOR(x) (((x) & GENMASK(11, 8)) >> 8)
#define CQHCI_VER_MINOR1(x) (((x) & GENMASK(7, 4)) >> 4)
#define CQHCI_VER_MINOR2(x) ((x) & GENMASK(3, 0))
/* capabilities */
#define CQHCI_CAP 0x04
#define CQHCI_CAP_CS 0x10000000 /* Crypto Support */
/* configuration */
#define CQHCI_CFG 0x08
#define CQHCI_DCMD 0x00001000
#define CQHCI_TASK_DESC_SZ 0x00000100
#define CQHCI_CRYPTO_GENERAL_ENABLE 0x00000002
#define CQHCI_ENABLE 0x00000001
/* control */
#define CQHCI_CTL 0x0C
#define CQHCI_CLEAR_ALL_TASKS 0x00000100
#define CQHCI_HALT 0x00000001
/* interrupt status */
#define CQHCI_IS 0x10
#define CQHCI_IS_HAC BIT(0)
#define CQHCI_IS_TCC BIT(1)
#define CQHCI_IS_RED BIT(2)
#define CQHCI_IS_TCL BIT(3)
#define CQHCI_IS_GCE BIT(4) /* General Crypto Error */
#define CQHCI_IS_ICCE BIT(5) /* Invalid Crypto Config Error */
#define CQHCI_IS_MASK (CQHCI_IS_TCC | CQHCI_IS_RED | \
CQHCI_IS_GCE | CQHCI_IS_ICCE)
/* interrupt status enable */
#define CQHCI_ISTE 0x14
/* interrupt signal enable */
#define CQHCI_ISGE 0x18
/* interrupt coalescing */
#define CQHCI_IC 0x1C
#define CQHCI_IC_ENABLE BIT(31)
#define CQHCI_IC_RESET BIT(16)
#define CQHCI_IC_ICCTHWEN BIT(15)
#define CQHCI_IC_ICCTH(x) (((x) & 0x1F) << 8)
#define CQHCI_IC_ICTOVALWEN BIT(7)
#define CQHCI_IC_ICTOVAL(x) ((x) & 0x7F)
/* task list base address */
#define CQHCI_TDLBA 0x20
/* task list base address upper */
#define CQHCI_TDLBAU 0x24
/* door-bell */
#define CQHCI_TDBR 0x28
/* task completion notification */
#define CQHCI_TCN 0x2C
/* device queue status */
#define CQHCI_DQS 0x30
/* device pending tasks */
#define CQHCI_DPT 0x34
/* task clear */
#define CQHCI_TCLR 0x38
/* task descriptor processing error */
#define CQHCI_TDPE 0x3c
/* send status config 1 */
#define CQHCI_SSC1 0x40
#define CQHCI_SSC1_CBC_MASK GENMASK(19, 16)
/* send status config 2 */
#define CQHCI_SSC2 0x44
/* response for dcmd */
#define CQHCI_CRDCT 0x48
/* response mode error mask */
#define CQHCI_RMEM 0x50
/* task error info */
#define CQHCI_TERRI 0x54
#define CQHCI_TERRI_C_INDEX(x) ((x) & GENMASK(5, 0))
#define CQHCI_TERRI_C_TASK(x) (((x) & GENMASK(12, 8)) >> 8)
#define CQHCI_TERRI_C_VALID(x) ((x) & BIT(15))
#define CQHCI_TERRI_D_INDEX(x) (((x) & GENMASK(21, 16)) >> 16)
#define CQHCI_TERRI_D_TASK(x) (((x) & GENMASK(28, 24)) >> 24)
#define CQHCI_TERRI_D_VALID(x) ((x) & BIT(31))
/* command response index */
#define CQHCI_CRI 0x58
/* command response argument */
#define CQHCI_CRA 0x5C
/* crypto capabilities */
#define CQHCI_CCAP 0x100
#define CQHCI_CRYPTOCAP 0x104
#define CQHCI_INT_ALL 0xF
#define CQHCI_IC_DEFAULT_ICCTH 31
#define CQHCI_IC_DEFAULT_ICTOVAL 1
/* attribute fields */
#define CQHCI_VALID(x) (((x) & 1) << 0)
#define CQHCI_END(x) (((x) & 1) << 1)
#define CQHCI_INT(x) (((x) & 1) << 2)
#define CQHCI_ACT(x) (((x) & 0x7) << 3)
/* data command task descriptor fields */
#define CQHCI_FORCED_PROG(x) (((x) & 1) << 6)
#define CQHCI_CONTEXT(x) (((x) & 0xF) << 7)
#define CQHCI_DATA_TAG(x) (((x) & 1) << 11)
#define CQHCI_DATA_DIR(x) (((x) & 1) << 12)
#define CQHCI_PRIORITY(x) (((x) & 1) << 13)
#define CQHCI_QBAR(x) (((x) & 1) << 14)
#define CQHCI_REL_WRITE(x) (((x) & 1) << 15)
#define CQHCI_BLK_COUNT(x) (((x) & 0xFFFF) << 16)
#define CQHCI_BLK_ADDR(x) (((x) & 0xFFFFFFFF) << 32)
/* direct command task descriptor fields */
#define CQHCI_CMD_INDEX(x) (((x) & 0x3F) << 16)
#define CQHCI_CMD_TIMING(x) (((x) & 1) << 22)
#define CQHCI_RESP_TYPE(x) (((x) & 0x3) << 23)
/* crypto task descriptor fields (for bits 64-127 of task descriptor) */
#define CQHCI_CRYPTO_ENABLE_BIT (1ULL << 47)
#define CQHCI_CRYPTO_KEYSLOT(x) ((u64)(x) << 32)
/* transfer descriptor fields */
#define CQHCI_DAT_LENGTH(x) (((x) & 0xFFFF) << 16)
#define CQHCI_DAT_ADDR_LO(x) (((x) & 0xFFFFFFFF) << 32)
#define CQHCI_DAT_ADDR_HI(x) (((x) & 0xFFFFFFFF) << 0)
/* CCAP - Crypto Capability 100h */
union cqhci_crypto_capabilities {
__le32 reg_val;
struct {
u8 num_crypto_cap;
u8 config_count;
u8 reserved;
u8 config_array_ptr;
};
};
enum cqhci_crypto_key_size {
CQHCI_CRYPTO_KEY_SIZE_INVALID = 0,
CQHCI_CRYPTO_KEY_SIZE_128 = 1,
CQHCI_CRYPTO_KEY_SIZE_192 = 2,
CQHCI_CRYPTO_KEY_SIZE_256 = 3,
CQHCI_CRYPTO_KEY_SIZE_512 = 4,
};
enum cqhci_crypto_alg {
CQHCI_CRYPTO_ALG_AES_XTS = 0,
CQHCI_CRYPTO_ALG_BITLOCKER_AES_CBC = 1,
CQHCI_CRYPTO_ALG_AES_ECB = 2,
CQHCI_CRYPTO_ALG_ESSIV_AES_CBC = 3,
};
/* x-CRYPTOCAP - Crypto Capability X */
union cqhci_crypto_cap_entry {
__le32 reg_val;
struct {
u8 algorithm_id;
u8 sdus_mask; /* Supported data unit size mask */
u8 key_size;
u8 reserved;
};
};
#define CQHCI_CRYPTO_CONFIGURATION_ENABLE (1 << 7)
#define CQHCI_CRYPTO_KEY_MAX_SIZE 64
/* x-CRYPTOCFG - Crypto Configuration X */
union cqhci_crypto_cfg_entry {
__le32 reg_val[32];
struct {
u8 crypto_key[CQHCI_CRYPTO_KEY_MAX_SIZE];
u8 data_unit_size;
u8 crypto_cap_idx;
u8 reserved_1;
u8 config_enable;
u8 reserved_multi_host;
u8 reserved_2;
u8 vsb[2];
u8 reserved_3[56];
};
};
struct cqhci_host_ops;
struct mmc_host;
struct mmc_request;
struct cqhci_slot;
struct cqhci_host {
const struct cqhci_host_ops *ops;
void __iomem *mmio;
struct mmc_host *mmc;
spinlock_t lock;
/* relative card address of device */
unsigned int rca;
/* 64 bit DMA */
bool dma64;
int num_slots;
int qcnt;
u32 dcmd_slot;
u32 caps;
#define CQHCI_TASK_DESC_SZ_128 0x1
u32 quirks;
#define CQHCI_QUIRK_SHORT_TXFR_DESC_SZ 0x1
bool enabled;
bool halted;
bool init_done;
bool activated;
bool waiting_for_idle;
bool recovery_halt;
size_t desc_size;
size_t data_size;
u8 *desc_base;
/* total descriptor size */
u8 slot_sz;
/* 64/128 bit depends on CQHCI_CFG */
u8 task_desc_len;
/* 64 bit on 32-bit arch, 128 bit on 64-bit */
u8 link_desc_len;
u8 *trans_desc_base;
/* same length as transfer descriptor */
u8 trans_desc_len;
dma_addr_t desc_dma_base;
dma_addr_t trans_desc_dma_base;
struct completion halt_comp;
wait_queue_head_t wait_queue;
struct cqhci_slot *slot;
#ifdef CONFIG_MMC_CRYPTO
union cqhci_crypto_capabilities crypto_capabilities;
union cqhci_crypto_cap_entry *crypto_cap_array;
u32 crypto_cfg_register;
#endif
};
struct cqhci_host_ops {
void (*dumpregs)(struct mmc_host *mmc);
void (*write_l)(struct cqhci_host *host, u32 val, int reg);
u32 (*read_l)(struct cqhci_host *host, int reg);
void (*enable)(struct mmc_host *mmc);
void (*disable)(struct mmc_host *mmc, bool recovery);
void (*update_dcmd_desc)(struct mmc_host *mmc, struct mmc_request *mrq,
u64 *data);
void (*pre_enable)(struct mmc_host *mmc);
void (*post_disable)(struct mmc_host *mmc);
#ifdef CONFIG_MMC_CRYPTO
int (*program_key)(struct cqhci_host *cq_host,
const union cqhci_crypto_cfg_entry *cfg, int slot);
#endif
};
static inline void cqhci_writel(struct cqhci_host *host, u32 val, int reg)
{
if (unlikely(host->ops->write_l))
host->ops->write_l(host, val, reg);
else
writel_relaxed(val, host->mmio + reg);
}
static inline u32 cqhci_readl(struct cqhci_host *host, int reg)
{
if (unlikely(host->ops->read_l))
return host->ops->read_l(host, reg);
else
return readl_relaxed(host->mmio + reg);
}
struct platform_device;
irqreturn_t cqhci_irq(struct mmc_host *mmc, u32 intmask, int cmd_error,
int data_error);
int cqhci_init(struct cqhci_host *cq_host, struct mmc_host *mmc, bool dma64);
struct cqhci_host *cqhci_pltfm_init(struct platform_device *pdev);
int cqhci_deactivate(struct mmc_host *mmc);
static inline int cqhci_suspend(struct mmc_host *mmc)
{
return cqhci_deactivate(mmc);
}
int cqhci_resume(struct mmc_host *mmc);
#endif
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