// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) // Copyright(c) 2015-17 Intel Corporation. /* * Cadence SoundWire Master module * Used by Master driver */ #include <linux/cleanup.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/debugfs.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/pm_runtime.h> #include <linux/soundwire/sdw_registers.h> #include <linux/soundwire/sdw.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include <linux/workqueue.h> #include "bus.h" #include "cadence_master.h" static int interrupt_mask; module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444); MODULE_PARM_DESC(…) …; #define CDNS_MCP_CONFIG … #define CDNS_MCP_CONFIG_BUS_REL … #define CDNS_IP_MCP_CONFIG … #define CDNS_IP_MCP_CONFIG_MCMD_RETRY … #define CDNS_IP_MCP_CONFIG_MPREQ_DELAY … #define CDNS_IP_MCP_CONFIG_MMASTER … #define CDNS_IP_MCP_CONFIG_SNIFFER … #define CDNS_IP_MCP_CONFIG_CMD … #define CDNS_IP_MCP_CONFIG_OP … #define CDNS_IP_MCP_CONFIG_OP_NORMAL … #define CDNS_MCP_CONTROL … #define CDNS_MCP_CONTROL_CMD_RST … #define CDNS_MCP_CONTROL_SOFT_RST … #define CDNS_MCP_CONTROL_HW_RST … #define CDNS_MCP_CONTROL_CLK_STOP_CLR … #define CDNS_IP_MCP_CONTROL … #define CDNS_IP_MCP_CONTROL_RST_DELAY … #define CDNS_IP_MCP_CONTROL_SW_RST … #define CDNS_IP_MCP_CONTROL_CLK_PAUSE … #define CDNS_IP_MCP_CONTROL_CMD_ACCEPT … #define CDNS_IP_MCP_CONTROL_BLOCK_WAKEUP … #define CDNS_IP_MCP_CMDCTRL … #define CDNS_IP_MCP_CMDCTRL_INSERT_PARITY_ERR … #define CDNS_MCP_SSPSTAT … #define CDNS_MCP_FRAME_SHAPE … #define CDNS_MCP_FRAME_SHAPE_INIT … #define CDNS_MCP_FRAME_SHAPE_COL_MASK … #define CDNS_MCP_FRAME_SHAPE_ROW_MASK … #define CDNS_MCP_CONFIG_UPDATE … #define CDNS_MCP_CONFIG_UPDATE_BIT … #define CDNS_MCP_PHYCTRL … #define CDNS_MCP_SSP_CTRL0 … #define CDNS_MCP_SSP_CTRL1 … #define CDNS_MCP_CLK_CTRL0 … #define CDNS_MCP_CLK_CTRL1 … #define CDNS_MCP_CLK_MCLKD_MASK … #define CDNS_MCP_STAT … #define CDNS_MCP_STAT_ACTIVE_BANK … #define CDNS_MCP_STAT_CLK_STOP … #define CDNS_MCP_INTSTAT … #define CDNS_MCP_INTMASK … #define CDNS_MCP_INT_IRQ … #define CDNS_MCP_INT_RESERVED1 … #define CDNS_MCP_INT_WAKEUP … #define CDNS_MCP_INT_SLAVE_RSVD … #define CDNS_MCP_INT_SLAVE_ALERT … #define CDNS_MCP_INT_SLAVE_ATTACH … #define CDNS_MCP_INT_SLAVE_NATTACH … #define CDNS_MCP_INT_SLAVE_MASK … #define CDNS_MCP_INT_DPINT … #define CDNS_MCP_INT_CTRL_CLASH … #define CDNS_MCP_INT_DATA_CLASH … #define CDNS_MCP_INT_PARITY … #define CDNS_MCP_INT_CMD_ERR … #define CDNS_MCP_INT_RESERVED2 … #define CDNS_MCP_INT_RX_NE … #define CDNS_MCP_INT_RX_WL … #define CDNS_MCP_INT_TXE … #define CDNS_MCP_INT_TXF … #define CDNS_MCP_INT_RESERVED … #define CDNS_MCP_INTSET … #define CDNS_MCP_SLAVE_STAT … #define CDNS_MCP_SLAVE_STAT_MASK … #define CDNS_MCP_SLAVE_INTSTAT0 … #define CDNS_MCP_SLAVE_INTSTAT1 … #define CDNS_MCP_SLAVE_INTSTAT_NPRESENT … #define CDNS_MCP_SLAVE_INTSTAT_ATTACHED … #define CDNS_MCP_SLAVE_INTSTAT_ALERT … #define CDNS_MCP_SLAVE_INTSTAT_RESERVED … #define CDNS_MCP_SLAVE_STATUS_BITS … #define CDNS_MCP_SLAVE_STATUS_NUM … #define CDNS_MCP_SLAVE_INTMASK0 … #define CDNS_MCP_SLAVE_INTMASK1 … #define CDNS_MCP_SLAVE_INTMASK0_MASK … #define CDNS_MCP_SLAVE_INTMASK1_MASK … #define CDNS_MCP_PORT_INTSTAT … #define CDNS_MCP_PDI_STAT … #define CDNS_MCP_FIFOLEVEL … #define CDNS_MCP_FIFOSTAT … #define CDNS_MCP_RX_FIFO_AVAIL … #define CDNS_IP_MCP_CMD_BASE … #define CDNS_IP_MCP_RESP_BASE … /* FIFO can hold 8 commands */ #define CDNS_MCP_CMD_LEN … #define CDNS_MCP_CMD_WORD_LEN … #define CDNS_MCP_CMD_SSP_TAG … #define CDNS_MCP_CMD_COMMAND … #define CDNS_MCP_CMD_DEV_ADDR … #define CDNS_MCP_CMD_REG_ADDR … #define CDNS_MCP_CMD_REG_DATA … #define CDNS_MCP_CMD_READ … #define CDNS_MCP_CMD_WRITE … #define CDNS_MCP_RESP_RDATA … #define CDNS_MCP_RESP_ACK … #define CDNS_MCP_RESP_NACK … #define CDNS_DP_SIZE … #define CDNS_DPN_B0_CONFIG(n) … #define CDNS_DPN_B0_CH_EN(n) … #define CDNS_DPN_B0_SAMPLE_CTRL(n) … #define CDNS_DPN_B0_OFFSET_CTRL(n) … #define CDNS_DPN_B0_HCTRL(n) … #define CDNS_DPN_B0_ASYNC_CTRL(n) … #define CDNS_DPN_B1_CONFIG(n) … #define CDNS_DPN_B1_CH_EN(n) … #define CDNS_DPN_B1_SAMPLE_CTRL(n) … #define CDNS_DPN_B1_OFFSET_CTRL(n) … #define CDNS_DPN_B1_HCTRL(n) … #define CDNS_DPN_B1_ASYNC_CTRL(n) … #define CDNS_DPN_CONFIG_BPM … #define CDNS_DPN_CONFIG_BGC … #define CDNS_DPN_CONFIG_WL … #define CDNS_DPN_CONFIG_PORT_DAT … #define CDNS_DPN_CONFIG_PORT_FLOW … #define CDNS_DPN_SAMPLE_CTRL_SI … #define CDNS_DPN_OFFSET_CTRL_1 … #define CDNS_DPN_OFFSET_CTRL_2 … #define CDNS_DPN_HCTRL_HSTOP … #define CDNS_DPN_HCTRL_HSTART … #define CDNS_DPN_HCTRL_LCTRL … #define CDNS_PORTCTRL … #define CDNS_PORTCTRL_TEST_FAILED … #define CDNS_PORTCTRL_DIRN … #define CDNS_PORTCTRL_BANK_INVERT … #define CDNS_PORT_OFFSET … #define CDNS_PDI_CONFIG(n) … #define CDNS_PDI_CONFIG_SOFT_RESET … #define CDNS_PDI_CONFIG_CHANNEL … #define CDNS_PDI_CONFIG_PORT … /* Driver defaults */ #define CDNS_TX_TIMEOUT … #define CDNS_SCP_RX_FIFOLEVEL … /* * register accessor helpers */ static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset) { … } static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value) { … } static inline u32 cdns_ip_readl(struct sdw_cdns *cdns, int offset) { … } static inline void cdns_ip_writel(struct sdw_cdns *cdns, int offset, u32 value) { … } static inline void cdns_updatel(struct sdw_cdns *cdns, int offset, u32 mask, u32 val) { … } static inline void cdns_ip_updatel(struct sdw_cdns *cdns, int offset, u32 mask, u32 val) { … } static int cdns_set_wait(struct sdw_cdns *cdns, int offset, u32 mask, u32 value) { … } static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value) { … } /* * all changes to the MCP_CONFIG, MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL * need to be confirmed with a write to MCP_CONFIG_UPDATE */ static int cdns_config_update(struct sdw_cdns *cdns) { … } /** * sdw_cdns_config_update() - Update configurations * @cdns: Cadence instance */ void sdw_cdns_config_update(struct sdw_cdns *cdns) { … } EXPORT_SYMBOL(…); /** * sdw_cdns_config_update_set_wait() - wait until configuration update bit is self-cleared * @cdns: Cadence instance */ int sdw_cdns_config_update_set_wait(struct sdw_cdns *cdns) { … } EXPORT_SYMBOL(…); /* * debugfs */ #ifdef CONFIG_DEBUG_FS #define RD_BUF … static ssize_t cdns_sprintf(struct sdw_cdns *cdns, char *buf, size_t pos, unsigned int reg) { … } static int cdns_reg_show(struct seq_file *s, void *data) { … } DEFINE_SHOW_ATTRIBUTE(…); static int cdns_hw_reset(void *data, u64 value) { … } DEFINE_DEBUGFS_ATTRIBUTE(…); static int cdns_parity_error_injection(void *data, u64 value) { … } DEFINE_DEBUGFS_ATTRIBUTE(…); static int cdns_set_pdi_loopback_source(void *data, u64 value) { … } DEFINE_DEBUGFS_ATTRIBUTE(…); static int cdns_set_pdi_loopback_target(void *data, u64 value) { … } DEFINE_DEBUGFS_ATTRIBUTE(…); /** * sdw_cdns_debugfs_init() - Cadence debugfs init * @cdns: Cadence instance * @root: debugfs root */ void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root) { … } EXPORT_SYMBOL_GPL(…); #endif /* CONFIG_DEBUG_FS */ /* * IO Calls */ static enum sdw_command_response cdns_fill_msg_resp(struct sdw_cdns *cdns, struct sdw_msg *msg, int count, int offset) { … } static void cdns_read_response(struct sdw_cdns *cdns) { … } static enum sdw_command_response _cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd, int offset, int count, bool defer) { … } static enum sdw_command_response cdns_program_scp_addr(struct sdw_cdns *cdns, struct sdw_msg *msg) { … } static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd) { … } enum sdw_command_response cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg) { … } EXPORT_SYMBOL(…); enum sdw_command_response cdns_xfer_msg_defer(struct sdw_bus *bus) { … } EXPORT_SYMBOL(…); u32 cdns_read_ping_status(struct sdw_bus *bus) { … } EXPORT_SYMBOL(…); /* * IRQ handling */ static int cdns_update_slave_status(struct sdw_cdns *cdns, u64 slave_intstat) { … } /** * sdw_cdns_irq() - Cadence interrupt handler * @irq: irq number * @dev_id: irq context */ irqreturn_t sdw_cdns_irq(int irq, void *dev_id) { … } EXPORT_SYMBOL(…); static void cdns_check_attached_status_dwork(struct work_struct *work) { … } /** * cdns_update_slave_status_work - update slave status in a work since we will need to handle * other interrupts eg. CDNS_MCP_INT_RX_WL during the update slave * process. * @work: cdns worker thread */ static void cdns_update_slave_status_work(struct work_struct *work) { … } /* paranoia check to make sure self-cleared bits are indeed cleared */ void sdw_cdns_check_self_clearing_bits(struct sdw_cdns *cdns, const char *string, bool initial_delay, int reset_iterations) { … } EXPORT_SYMBOL(…); /* * init routines */ /** * sdw_cdns_exit_reset() - Program reset parameters and start bus operations * @cdns: Cadence instance */ int sdw_cdns_exit_reset(struct sdw_cdns *cdns) { … } EXPORT_SYMBOL(…); /** * cdns_enable_slave_interrupts() - Enable SDW slave interrupts * @cdns: Cadence instance * @state: boolean for true/false */ static void cdns_enable_slave_interrupts(struct sdw_cdns *cdns, bool state) { … } /** * sdw_cdns_enable_interrupt() - Enable SDW interrupts * @cdns: Cadence instance * @state: True if we are trying to enable interrupt. */ int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state) { … } EXPORT_SYMBOL(…); static int cdns_allocate_pdi(struct sdw_cdns *cdns, struct sdw_cdns_pdi **stream, u32 num) { … } /** * sdw_cdns_pdi_init() - PDI initialization routine * * @cdns: Cadence instance * @config: Stream configurations */ int sdw_cdns_pdi_init(struct sdw_cdns *cdns, struct sdw_cdns_stream_config config) { … } EXPORT_SYMBOL(…); static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols) { … } static void cdns_init_clock_ctrl(struct sdw_cdns *cdns) { … } /** * sdw_cdns_init() - Cadence initialization * @cdns: Cadence instance */ int sdw_cdns_init(struct sdw_cdns *cdns) { … } EXPORT_SYMBOL(…); int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params) { … } EXPORT_SYMBOL(…); static int cdns_port_params(struct sdw_bus *bus, struct sdw_port_params *p_params, unsigned int bank) { … } static int cdns_transport_params(struct sdw_bus *bus, struct sdw_transport_params *t_params, enum sdw_reg_bank bank) { … } static int cdns_port_enable(struct sdw_bus *bus, struct sdw_enable_ch *enable_ch, unsigned int bank) { … } static const struct sdw_master_port_ops cdns_port_ops = …; /** * sdw_cdns_is_clock_stop: Check clock status * * @cdns: Cadence instance */ bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns) { … } EXPORT_SYMBOL(…); /** * sdw_cdns_clock_stop: Cadence clock stop configuration routine * * @cdns: Cadence instance * @block_wake: prevent wakes if required by the platform */ int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake) { … } EXPORT_SYMBOL(…); /** * sdw_cdns_clock_restart: Cadence PM clock restart configuration routine * * @cdns: Cadence instance * @bus_reset: context may be lost while in low power modes and the bus * may require a Severe Reset and re-enumeration after a wake. */ int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset) { … } EXPORT_SYMBOL(…); /** * sdw_cdns_probe() - Cadence probe routine * @cdns: Cadence instance */ int sdw_cdns_probe(struct sdw_cdns *cdns) { … } EXPORT_SYMBOL(…); int cdns_set_sdw_stream(struct snd_soc_dai *dai, void *stream, int direction) { … } EXPORT_SYMBOL(…); /** * cdns_find_pdi() - Find a free PDI * * @cdns: Cadence instance * @num: Number of PDIs * @pdi: PDI instances * @dai_id: DAI id * * Find a PDI for a given PDI array. The PDI num and dai_id are * expected to match, return NULL otherwise. */ static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns, unsigned int num, struct sdw_cdns_pdi *pdi, int dai_id) { … } /** * sdw_cdns_config_stream: Configure a stream * * @cdns: Cadence instance * @ch: Channel count * @dir: Data direction * @pdi: PDI to be used */ void sdw_cdns_config_stream(struct sdw_cdns *cdns, u32 ch, u32 dir, struct sdw_cdns_pdi *pdi) { … } EXPORT_SYMBOL(…); /** * sdw_cdns_alloc_pdi() - Allocate a PDI * * @cdns: Cadence instance * @stream: Stream to be allocated * @ch: Channel count * @dir: Data direction * @dai_id: DAI id */ struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns, struct sdw_cdns_streams *stream, u32 ch, u32 dir, int dai_id) { … } EXPORT_SYMBOL(…); MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …;
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