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kernel/include/linux/qcom-geni-se.h
Vinod Koul 0fa8266294 soc: qcom: geni: Add support for gpi dma 
GPI DMA is one of the DMA modes supported on geni, this adds support to
enable that mode

Also do better documentation of the enum geni_se_xfer_mode.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210625052213.32260-3-vkoul@kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2021-08-04 14:23:31 -05:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
*/
#ifndef _LINUX_QCOM_GENI_SE
#define _LINUX_QCOM_GENI_SE
#include <linux/interconnect.h>
/**
* enum geni_se_xfer_mode: Transfer modes supported by Serial Engines
*
* @GENI_SE_INVALID: Invalid mode
* @GENI_SE_FIFO: FIFO mode. Data is transferred with SE FIFO
* by programmed IO method
* @GENI_SE_DMA: Serial Engine DMA mode. Data is transferred
* with SE by DMAengine internal to SE
* @GENI_GPI_DMA: GPI DMA mode. Data is transferred using a DMAengine
* configured by a firmware residing on a GSI engine. This DMA name is
* interchangeably used as GSI or GPI which seem to imply the same DMAengine
*/
enum geni_se_xfer_mode {
GENI_SE_INVALID,
GENI_SE_FIFO,
GENI_SE_DMA,
GENI_GPI_DMA,
};
/* Protocols supported by GENI Serial Engines */
enum geni_se_protocol_type {
GENI_SE_NONE,
GENI_SE_SPI,
GENI_SE_UART,
GENI_SE_I2C,
GENI_SE_I3C,
};
struct geni_wrapper;
struct clk;
enum geni_icc_path_index {
GENI_TO_CORE,
CPU_TO_GENI,
GENI_TO_DDR
};
struct geni_icc_path {
struct icc_path *path;
unsigned int avg_bw;
};
/**
* struct geni_se - GENI Serial Engine
* @base: Base Address of the Serial Engine's register block
* @dev: Pointer to the Serial Engine device
* @wrapper: Pointer to the parent QUP Wrapper core
* @clk: Handle to the core serial engine clock
* @num_clk_levels: Number of valid clock levels in clk_perf_tbl
* @clk_perf_tbl: Table of clock frequency input to serial engine clock
* @icc_paths: Array of ICC paths for SE
*/
struct geni_se {
void __iomem *base;
struct device *dev;
struct geni_wrapper *wrapper;
struct clk *clk;
unsigned int num_clk_levels;
unsigned long *clk_perf_tbl;
struct geni_icc_path icc_paths[3];
};
/* Common SE registers */
#define GENI_FORCE_DEFAULT_REG 0x20
#define SE_GENI_STATUS 0x40
#define GENI_SER_M_CLK_CFG 0x48
#define GENI_SER_S_CLK_CFG 0x4c
#define GENI_IF_DISABLE_RO 0x64
#define GENI_FW_REVISION_RO 0x68
#define SE_GENI_CLK_SEL 0x7c
#define SE_GENI_DMA_MODE_EN 0x258
#define SE_GENI_M_CMD0 0x600
#define SE_GENI_M_CMD_CTRL_REG 0x604
#define SE_GENI_M_IRQ_STATUS 0x610
#define SE_GENI_M_IRQ_EN 0x614
#define SE_GENI_M_IRQ_CLEAR 0x618
#define SE_GENI_S_CMD0 0x630
#define SE_GENI_S_CMD_CTRL_REG 0x634
#define SE_GENI_S_IRQ_STATUS 0x640
#define SE_GENI_S_IRQ_EN 0x644
#define SE_GENI_S_IRQ_CLEAR 0x648
#define SE_GENI_TX_FIFOn 0x700
#define SE_GENI_RX_FIFOn 0x780
#define SE_GENI_TX_FIFO_STATUS 0x800
#define SE_GENI_RX_FIFO_STATUS 0x804
#define SE_GENI_TX_WATERMARK_REG 0x80c
#define SE_GENI_RX_WATERMARK_REG 0x810
#define SE_GENI_RX_RFR_WATERMARK_REG 0x814
#define SE_GENI_IOS 0x908
#define SE_DMA_TX_IRQ_STAT 0xc40
#define SE_DMA_TX_IRQ_CLR 0xc44
#define SE_DMA_TX_FSM_RST 0xc58
#define SE_DMA_RX_IRQ_STAT 0xd40
#define SE_DMA_RX_IRQ_CLR 0xd44
#define SE_DMA_RX_FSM_RST 0xd58
#define SE_HW_PARAM_0 0xe24
#define SE_HW_PARAM_1 0xe28
/* GENI_FORCE_DEFAULT_REG fields */
#define FORCE_DEFAULT BIT(0)
/* GENI_STATUS fields */
#define M_GENI_CMD_ACTIVE BIT(0)
#define S_GENI_CMD_ACTIVE BIT(12)
/* GENI_SER_M_CLK_CFG/GENI_SER_S_CLK_CFG */
#define SER_CLK_EN BIT(0)
#define CLK_DIV_MSK GENMASK(15, 4)
#define CLK_DIV_SHFT 4
/* GENI_IF_DISABLE_RO fields */
#define FIFO_IF_DISABLE (BIT(0))
/* GENI_FW_REVISION_RO fields */
#define FW_REV_PROTOCOL_MSK GENMASK(15, 8)
#define FW_REV_PROTOCOL_SHFT 8
/* GENI_CLK_SEL fields */
#define CLK_SEL_MSK GENMASK(2, 0)
/* SE_GENI_DMA_MODE_EN */
#define GENI_DMA_MODE_EN BIT(0)
/* GENI_M_CMD0 fields */
#define M_OPCODE_MSK GENMASK(31, 27)
#define M_OPCODE_SHFT 27
#define M_PARAMS_MSK GENMASK(26, 0)
/* GENI_M_CMD_CTRL_REG */
#define M_GENI_CMD_CANCEL BIT(2)
#define M_GENI_CMD_ABORT BIT(1)
#define M_GENI_DISABLE BIT(0)
/* GENI_S_CMD0 fields */
#define S_OPCODE_MSK GENMASK(31, 27)
#define S_OPCODE_SHFT 27
#define S_PARAMS_MSK GENMASK(26, 0)
/* GENI_S_CMD_CTRL_REG */
#define S_GENI_CMD_CANCEL BIT(2)
#define S_GENI_CMD_ABORT BIT(1)
#define S_GENI_DISABLE BIT(0)
/* GENI_M_IRQ_EN fields */
#define M_CMD_DONE_EN BIT(0)
#define M_CMD_OVERRUN_EN BIT(1)
#define M_ILLEGAL_CMD_EN BIT(2)
#define M_CMD_FAILURE_EN BIT(3)
#define M_CMD_CANCEL_EN BIT(4)
#define M_CMD_ABORT_EN BIT(5)
#define M_TIMESTAMP_EN BIT(6)
#define M_RX_IRQ_EN BIT(7)
#define M_GP_SYNC_IRQ_0_EN BIT(8)
#define M_GP_IRQ_0_EN BIT(9)
#define M_GP_IRQ_1_EN BIT(10)
#define M_GP_IRQ_2_EN BIT(11)
#define M_GP_IRQ_3_EN BIT(12)
#define M_GP_IRQ_4_EN BIT(13)
#define M_GP_IRQ_5_EN BIT(14)
#define M_IO_DATA_DEASSERT_EN BIT(22)
#define M_IO_DATA_ASSERT_EN BIT(23)
#define M_RX_FIFO_RD_ERR_EN BIT(24)
#define M_RX_FIFO_WR_ERR_EN BIT(25)
#define M_RX_FIFO_WATERMARK_EN BIT(26)
#define M_RX_FIFO_LAST_EN BIT(27)
#define M_TX_FIFO_RD_ERR_EN BIT(28)
#define M_TX_FIFO_WR_ERR_EN BIT(29)
#define M_TX_FIFO_WATERMARK_EN BIT(30)
#define M_SEC_IRQ_EN BIT(31)
#define M_COMMON_GENI_M_IRQ_EN (GENMASK(6, 1) | \
M_IO_DATA_DEASSERT_EN | \
M_IO_DATA_ASSERT_EN | M_RX_FIFO_RD_ERR_EN | \
M_RX_FIFO_WR_ERR_EN | M_TX_FIFO_RD_ERR_EN | \
M_TX_FIFO_WR_ERR_EN)
/* GENI_S_IRQ_EN fields */
#define S_CMD_DONE_EN BIT(0)
#define S_CMD_OVERRUN_EN BIT(1)
#define S_ILLEGAL_CMD_EN BIT(2)
#define S_CMD_FAILURE_EN BIT(3)
#define S_CMD_CANCEL_EN BIT(4)
#define S_CMD_ABORT_EN BIT(5)
#define S_GP_SYNC_IRQ_0_EN BIT(8)
#define S_GP_IRQ_0_EN BIT(9)
#define S_GP_IRQ_1_EN BIT(10)
#define S_GP_IRQ_2_EN BIT(11)
#define S_GP_IRQ_3_EN BIT(12)
#define S_GP_IRQ_4_EN BIT(13)
#define S_GP_IRQ_5_EN BIT(14)
#define S_IO_DATA_DEASSERT_EN BIT(22)
#define S_IO_DATA_ASSERT_EN BIT(23)
#define S_RX_FIFO_RD_ERR_EN BIT(24)
#define S_RX_FIFO_WR_ERR_EN BIT(25)
#define S_RX_FIFO_WATERMARK_EN BIT(26)
#define S_RX_FIFO_LAST_EN BIT(27)
#define S_COMMON_GENI_S_IRQ_EN (GENMASK(5, 1) | GENMASK(13, 9) | \
S_RX_FIFO_RD_ERR_EN | S_RX_FIFO_WR_ERR_EN)
/* GENI_/TX/RX/RX_RFR/_WATERMARK_REG fields */
#define WATERMARK_MSK GENMASK(5, 0)
/* GENI_TX_FIFO_STATUS fields */
#define TX_FIFO_WC GENMASK(27, 0)
/* GENI_RX_FIFO_STATUS fields */
#define RX_LAST BIT(31)
#define RX_LAST_BYTE_VALID_MSK GENMASK(30, 28)
#define RX_LAST_BYTE_VALID_SHFT 28
#define RX_FIFO_WC_MSK GENMASK(24, 0)
/* SE_GENI_IOS fields */
#define IO2_DATA_IN BIT(1)
#define RX_DATA_IN BIT(0)
/* SE_DMA_TX_IRQ_STAT Register fields */
#define TX_DMA_DONE BIT(0)
#define TX_EOT BIT(1)
#define TX_SBE BIT(2)
#define TX_RESET_DONE BIT(3)
/* SE_DMA_RX_IRQ_STAT Register fields */
#define RX_DMA_DONE BIT(0)
#define RX_EOT BIT(1)
#define RX_SBE BIT(2)
#define RX_RESET_DONE BIT(3)
#define RX_FLUSH_DONE BIT(4)
#define RX_GENI_GP_IRQ GENMASK(10, 5)
#define RX_GENI_CANCEL_IRQ BIT(11)
#define RX_GENI_GP_IRQ_EXT GENMASK(13, 12)
/* SE_HW_PARAM_0 fields */
#define TX_FIFO_WIDTH_MSK GENMASK(29, 24)
#define TX_FIFO_WIDTH_SHFT 24
#define TX_FIFO_DEPTH_MSK GENMASK(21, 16)
#define TX_FIFO_DEPTH_SHFT 16
/* SE_HW_PARAM_1 fields */
#define RX_FIFO_WIDTH_MSK GENMASK(29, 24)
#define RX_FIFO_WIDTH_SHFT 24
#define RX_FIFO_DEPTH_MSK GENMASK(21, 16)
#define RX_FIFO_DEPTH_SHFT 16
#define HW_VER_MAJOR_MASK GENMASK(31, 28)
#define HW_VER_MAJOR_SHFT 28
#define HW_VER_MINOR_MASK GENMASK(27, 16)
#define HW_VER_MINOR_SHFT 16
#define HW_VER_STEP_MASK GENMASK(15, 0)
#define GENI_SE_VERSION_MAJOR(ver) ((ver & HW_VER_MAJOR_MASK) >> HW_VER_MAJOR_SHFT)
#define GENI_SE_VERSION_MINOR(ver) ((ver & HW_VER_MINOR_MASK) >> HW_VER_MINOR_SHFT)
#define GENI_SE_VERSION_STEP(ver) (ver & HW_VER_STEP_MASK)
/* QUP SE VERSION value for major number 2 and minor number 5 */
#define QUP_SE_VERSION_2_5 0x20050000
/*
* Define bandwidth thresholds that cause the underlying Core 2X interconnect
* clock to run at the named frequency. These baseline values are recommended
* by the hardware team, and are not dynamically scaled with GENI bandwidth
* beyond basic on/off.
*/
#define CORE_2X_19_2_MHZ 960
#define CORE_2X_50_MHZ 2500
#define CORE_2X_100_MHZ 5000
#define CORE_2X_150_MHZ 7500
#define CORE_2X_200_MHZ 10000
#define CORE_2X_236_MHZ 16383
#define GENI_DEFAULT_BW Bps_to_icc(1000)
#if IS_ENABLED(CONFIG_QCOM_GENI_SE)
u32 geni_se_get_qup_hw_version(struct geni_se *se);
/**
* geni_se_read_proto() - Read the protocol configured for a serial engine
* @se: Pointer to the concerned serial engine.
*
* Return: Protocol value as configured in the serial engine.
*/
static inline u32 geni_se_read_proto(struct geni_se *se)
{
u32 val;
val = readl_relaxed(se->base + GENI_FW_REVISION_RO);
return (val & FW_REV_PROTOCOL_MSK) >> FW_REV_PROTOCOL_SHFT;
}
/**
* geni_se_setup_m_cmd() - Setup the primary sequencer
* @se: Pointer to the concerned serial engine.
* @cmd: Command/Operation to setup in the primary sequencer.
* @params: Parameter for the sequencer command.
*
* This function is used to configure the primary sequencer with the
* command and its associated parameters.
*/
static inline void geni_se_setup_m_cmd(struct geni_se *se, u32 cmd, u32 params)
{
u32 m_cmd;
m_cmd = (cmd << M_OPCODE_SHFT) | (params & M_PARAMS_MSK);
writel(m_cmd, se->base + SE_GENI_M_CMD0);
}
/**
* geni_se_setup_s_cmd() - Setup the secondary sequencer
* @se: Pointer to the concerned serial engine.
* @cmd: Command/Operation to setup in the secondary sequencer.
* @params: Parameter for the sequencer command.
*
* This function is used to configure the secondary sequencer with the
* command and its associated parameters.
*/
static inline void geni_se_setup_s_cmd(struct geni_se *se, u32 cmd, u32 params)
{
u32 s_cmd;
s_cmd = readl_relaxed(se->base + SE_GENI_S_CMD0);
s_cmd &= ~(S_OPCODE_MSK | S_PARAMS_MSK);
s_cmd |= (cmd << S_OPCODE_SHFT);
s_cmd |= (params & S_PARAMS_MSK);
writel(s_cmd, se->base + SE_GENI_S_CMD0);
}
/**
* geni_se_cancel_m_cmd() - Cancel the command configured in the primary
* sequencer
* @se: Pointer to the concerned serial engine.
*
* This function is used to cancel the currently configured command in the
* primary sequencer.
*/
static inline void geni_se_cancel_m_cmd(struct geni_se *se)
{
writel_relaxed(M_GENI_CMD_CANCEL, se->base + SE_GENI_M_CMD_CTRL_REG);
}
/**
* geni_se_cancel_s_cmd() - Cancel the command configured in the secondary
* sequencer
* @se: Pointer to the concerned serial engine.
*
* This function is used to cancel the currently configured command in the
* secondary sequencer.
*/
static inline void geni_se_cancel_s_cmd(struct geni_se *se)
{
writel_relaxed(S_GENI_CMD_CANCEL, se->base + SE_GENI_S_CMD_CTRL_REG);
}
/**
* geni_se_abort_m_cmd() - Abort the command configured in the primary sequencer
* @se: Pointer to the concerned serial engine.
*
* This function is used to force abort the currently configured command in the
* primary sequencer.
*/
static inline void geni_se_abort_m_cmd(struct geni_se *se)
{
writel_relaxed(M_GENI_CMD_ABORT, se->base + SE_GENI_M_CMD_CTRL_REG);
}
/**
* geni_se_abort_s_cmd() - Abort the command configured in the secondary
* sequencer
* @se: Pointer to the concerned serial engine.
*
* This function is used to force abort the currently configured command in the
* secondary sequencer.
*/
static inline void geni_se_abort_s_cmd(struct geni_se *se)
{
writel_relaxed(S_GENI_CMD_ABORT, se->base + SE_GENI_S_CMD_CTRL_REG);
}
/**
* geni_se_get_tx_fifo_depth() - Get the TX fifo depth of the serial engine
* @se: Pointer to the concerned serial engine.
*
* This function is used to get the depth i.e. number of elements in the
* TX fifo of the serial engine.
*
* Return: TX fifo depth in units of FIFO words.
*/
static inline u32 geni_se_get_tx_fifo_depth(struct geni_se *se)
{
u32 val;
val = readl_relaxed(se->base + SE_HW_PARAM_0);
return (val & TX_FIFO_DEPTH_MSK) >> TX_FIFO_DEPTH_SHFT;
}
/**
* geni_se_get_tx_fifo_width() - Get the TX fifo width of the serial engine
* @se: Pointer to the concerned serial engine.
*
* This function is used to get the width i.e. word size per element in the
* TX fifo of the serial engine.
*
* Return: TX fifo width in bits
*/
static inline u32 geni_se_get_tx_fifo_width(struct geni_se *se)
{
u32 val;
val = readl_relaxed(se->base + SE_HW_PARAM_0);
return (val & TX_FIFO_WIDTH_MSK) >> TX_FIFO_WIDTH_SHFT;
}
/**
* geni_se_get_rx_fifo_depth() - Get the RX fifo depth of the serial engine
* @se: Pointer to the concerned serial engine.
*
* This function is used to get the depth i.e. number of elements in the
* RX fifo of the serial engine.
*
* Return: RX fifo depth in units of FIFO words
*/
static inline u32 geni_se_get_rx_fifo_depth(struct geni_se *se)
{
u32 val;
val = readl_relaxed(se->base + SE_HW_PARAM_1);
return (val & RX_FIFO_DEPTH_MSK) >> RX_FIFO_DEPTH_SHFT;
}
void geni_se_init(struct geni_se *se, u32 rx_wm, u32 rx_rfr);
void geni_se_select_mode(struct geni_se *se, enum geni_se_xfer_mode mode);
void geni_se_config_packing(struct geni_se *se, int bpw, int pack_words,
bool msb_to_lsb, bool tx_cfg, bool rx_cfg);
int geni_se_resources_off(struct geni_se *se);
int geni_se_resources_on(struct geni_se *se);
int geni_se_clk_tbl_get(struct geni_se *se, unsigned long **tbl);
int geni_se_clk_freq_match(struct geni_se *se, unsigned long req_freq,
unsigned int *index, unsigned long *res_freq,
bool exact);
int geni_se_tx_dma_prep(struct geni_se *se, void *buf, size_t len,
dma_addr_t *iova);
int geni_se_rx_dma_prep(struct geni_se *se, void *buf, size_t len,
dma_addr_t *iova);
void geni_se_tx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len);
void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len);
int geni_icc_get(struct geni_se *se, const char *icc_ddr);
int geni_icc_set_bw(struct geni_se *se);
void geni_icc_set_tag(struct geni_se *se, u32 tag);
int geni_icc_enable(struct geni_se *se);
int geni_icc_disable(struct geni_se *se);
#endif
#endif
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