diff options
Diffstat (limited to 'drivers/mmc/host/cqhci.h')
| -rw-r--r-- | drivers/mmc/host/cqhci.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h new file mode 100644 index 000000000000..9e68286a07b4 --- /dev/null +++ b/drivers/mmc/host/cqhci.h @@ -0,0 +1,240 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#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 +/* configuration */ +#define CQHCI_CFG 0x08 +#define CQHCI_DCMD 0x00001000 +#define CQHCI_TASK_DESC_SZ 0x00000100 +#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_MASK (CQHCI_IS_TCC | CQHCI_IS_RED) + +/* 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 + +/* send status config 1 */ +#define CQHCI_SSC1 0x40 + +/* 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 + +#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) + +/* 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) + +struct cqhci_host_ops; +struct mmc_host; +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; +}; + +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); +}; + +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_suspend(struct mmc_host *mmc); +int cqhci_resume(struct mmc_host *mmc); + +#endif |