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6f7219fecf
No need for an "else" after a "return" statement. Remove multiple such occurrences in Intel-specific code. Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Link: https://lore.kernel.org/r/20200508003046.23162-3-guennadi.liakhovetski@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
1556 lines
38 KiB
C
1556 lines
38 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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// Copyright(c) 2015-17 Intel Corporation.
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/*
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* Cadence SoundWire Master module
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* Used by Master driver
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/debugfs.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/soundwire/sdw_registers.h>
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#include <linux/soundwire/sdw.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "bus.h"
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#include "cadence_master.h"
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static int interrupt_mask;
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module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444);
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MODULE_PARM_DESC(cdns_mcp_int_mask, "Cadence MCP IntMask");
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#define CDNS_MCP_CONFIG 0x0
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#define CDNS_MCP_CONFIG_MCMD_RETRY GENMASK(27, 24)
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#define CDNS_MCP_CONFIG_MPREQ_DELAY GENMASK(20, 16)
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#define CDNS_MCP_CONFIG_MMASTER BIT(7)
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#define CDNS_MCP_CONFIG_BUS_REL BIT(6)
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#define CDNS_MCP_CONFIG_SNIFFER BIT(5)
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#define CDNS_MCP_CONFIG_SSPMOD BIT(4)
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#define CDNS_MCP_CONFIG_CMD BIT(3)
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#define CDNS_MCP_CONFIG_OP GENMASK(2, 0)
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#define CDNS_MCP_CONFIG_OP_NORMAL 0
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#define CDNS_MCP_CONTROL 0x4
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#define CDNS_MCP_CONTROL_RST_DELAY GENMASK(10, 8)
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#define CDNS_MCP_CONTROL_CMD_RST BIT(7)
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#define CDNS_MCP_CONTROL_SOFT_RST BIT(6)
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#define CDNS_MCP_CONTROL_SW_RST BIT(5)
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#define CDNS_MCP_CONTROL_HW_RST BIT(4)
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#define CDNS_MCP_CONTROL_CLK_PAUSE BIT(3)
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#define CDNS_MCP_CONTROL_CLK_STOP_CLR BIT(2)
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#define CDNS_MCP_CONTROL_CMD_ACCEPT BIT(1)
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#define CDNS_MCP_CONTROL_BLOCK_WAKEUP BIT(0)
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#define CDNS_MCP_CMDCTRL 0x8
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#define CDNS_MCP_SSPSTAT 0xC
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#define CDNS_MCP_FRAME_SHAPE 0x10
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#define CDNS_MCP_FRAME_SHAPE_INIT 0x14
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#define CDNS_MCP_FRAME_SHAPE_COL_MASK GENMASK(2, 0)
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#define CDNS_MCP_FRAME_SHAPE_ROW_OFFSET 3
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#define CDNS_MCP_CONFIG_UPDATE 0x18
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#define CDNS_MCP_CONFIG_UPDATE_BIT BIT(0)
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#define CDNS_MCP_PHYCTRL 0x1C
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#define CDNS_MCP_SSP_CTRL0 0x20
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#define CDNS_MCP_SSP_CTRL1 0x28
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#define CDNS_MCP_CLK_CTRL0 0x30
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#define CDNS_MCP_CLK_CTRL1 0x38
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#define CDNS_MCP_CLK_MCLKD_MASK GENMASK(7, 0)
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#define CDNS_MCP_STAT 0x40
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#define CDNS_MCP_STAT_ACTIVE_BANK BIT(20)
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#define CDNS_MCP_STAT_CLK_STOP BIT(16)
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#define CDNS_MCP_INTSTAT 0x44
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#define CDNS_MCP_INTMASK 0x48
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#define CDNS_MCP_INT_IRQ BIT(31)
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#define CDNS_MCP_INT_RESERVED1 GENMASK(30, 17)
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#define CDNS_MCP_INT_WAKEUP BIT(16)
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#define CDNS_MCP_INT_SLAVE_RSVD BIT(15)
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#define CDNS_MCP_INT_SLAVE_ALERT BIT(14)
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#define CDNS_MCP_INT_SLAVE_ATTACH BIT(13)
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#define CDNS_MCP_INT_SLAVE_NATTACH BIT(12)
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#define CDNS_MCP_INT_SLAVE_MASK GENMASK(15, 12)
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#define CDNS_MCP_INT_DPINT BIT(11)
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#define CDNS_MCP_INT_CTRL_CLASH BIT(10)
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#define CDNS_MCP_INT_DATA_CLASH BIT(9)
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#define CDNS_MCP_INT_PARITY BIT(8)
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#define CDNS_MCP_INT_CMD_ERR BIT(7)
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#define CDNS_MCP_INT_RESERVED2 GENMASK(6, 4)
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#define CDNS_MCP_INT_RX_NE BIT(3)
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#define CDNS_MCP_INT_RX_WL BIT(2)
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#define CDNS_MCP_INT_TXE BIT(1)
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#define CDNS_MCP_INT_TXF BIT(0)
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#define CDNS_MCP_INT_RESERVED (CDNS_MCP_INT_RESERVED1 | CDNS_MCP_INT_RESERVED2)
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#define CDNS_MCP_INTSET 0x4C
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#define CDNS_MCP_SLAVE_STAT 0x50
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#define CDNS_MCP_SLAVE_STAT_MASK GENMASK(1, 0)
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#define CDNS_MCP_SLAVE_INTSTAT0 0x54
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#define CDNS_MCP_SLAVE_INTSTAT1 0x58
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#define CDNS_MCP_SLAVE_INTSTAT_NPRESENT BIT(0)
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#define CDNS_MCP_SLAVE_INTSTAT_ATTACHED BIT(1)
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#define CDNS_MCP_SLAVE_INTSTAT_ALERT BIT(2)
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#define CDNS_MCP_SLAVE_INTSTAT_RESERVED BIT(3)
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#define CDNS_MCP_SLAVE_STATUS_BITS GENMASK(3, 0)
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#define CDNS_MCP_SLAVE_STATUS_NUM 4
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#define CDNS_MCP_SLAVE_INTMASK0 0x5C
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#define CDNS_MCP_SLAVE_INTMASK1 0x60
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#define CDNS_MCP_SLAVE_INTMASK0_MASK GENMASK(31, 0)
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#define CDNS_MCP_SLAVE_INTMASK1_MASK GENMASK(15, 0)
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#define CDNS_MCP_PORT_INTSTAT 0x64
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#define CDNS_MCP_PDI_STAT 0x6C
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#define CDNS_MCP_FIFOLEVEL 0x78
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#define CDNS_MCP_FIFOSTAT 0x7C
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#define CDNS_MCP_RX_FIFO_AVAIL GENMASK(5, 0)
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#define CDNS_MCP_CMD_BASE 0x80
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#define CDNS_MCP_RESP_BASE 0x80
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#define CDNS_MCP_CMD_LEN 0x20
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#define CDNS_MCP_CMD_WORD_LEN 0x4
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#define CDNS_MCP_CMD_SSP_TAG BIT(31)
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#define CDNS_MCP_CMD_COMMAND GENMASK(30, 28)
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#define CDNS_MCP_CMD_DEV_ADDR GENMASK(27, 24)
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#define CDNS_MCP_CMD_REG_ADDR_H GENMASK(23, 16)
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#define CDNS_MCP_CMD_REG_ADDR_L GENMASK(15, 8)
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#define CDNS_MCP_CMD_REG_DATA GENMASK(7, 0)
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#define CDNS_MCP_CMD_READ 2
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#define CDNS_MCP_CMD_WRITE 3
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#define CDNS_MCP_RESP_RDATA GENMASK(15, 8)
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#define CDNS_MCP_RESP_ACK BIT(0)
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#define CDNS_MCP_RESP_NACK BIT(1)
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#define CDNS_DP_SIZE 128
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#define CDNS_DPN_B0_CONFIG(n) (0x100 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B0_CH_EN(n) (0x104 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B0_SAMPLE_CTRL(n) (0x108 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B0_OFFSET_CTRL(n) (0x10C + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B0_HCTRL(n) (0x110 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B0_ASYNC_CTRL(n) (0x114 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B1_CONFIG(n) (0x118 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B1_CH_EN(n) (0x11C + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B1_SAMPLE_CTRL(n) (0x120 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B1_OFFSET_CTRL(n) (0x124 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B1_HCTRL(n) (0x128 + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_B1_ASYNC_CTRL(n) (0x12C + CDNS_DP_SIZE * (n))
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#define CDNS_DPN_CONFIG_BPM BIT(18)
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#define CDNS_DPN_CONFIG_BGC GENMASK(17, 16)
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#define CDNS_DPN_CONFIG_WL GENMASK(12, 8)
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#define CDNS_DPN_CONFIG_PORT_DAT GENMASK(3, 2)
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#define CDNS_DPN_CONFIG_PORT_FLOW GENMASK(1, 0)
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#define CDNS_DPN_SAMPLE_CTRL_SI GENMASK(15, 0)
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#define CDNS_DPN_OFFSET_CTRL_1 GENMASK(7, 0)
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#define CDNS_DPN_OFFSET_CTRL_2 GENMASK(15, 8)
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#define CDNS_DPN_HCTRL_HSTOP GENMASK(3, 0)
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#define CDNS_DPN_HCTRL_HSTART GENMASK(7, 4)
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#define CDNS_DPN_HCTRL_LCTRL GENMASK(10, 8)
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#define CDNS_PORTCTRL 0x130
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#define CDNS_PORTCTRL_DIRN BIT(7)
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#define CDNS_PORTCTRL_BANK_INVERT BIT(8)
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#define CDNS_PORT_OFFSET 0x80
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#define CDNS_PDI_CONFIG(n) (0x1100 + (n) * 16)
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#define CDNS_PDI_CONFIG_SOFT_RESET BIT(24)
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#define CDNS_PDI_CONFIG_CHANNEL GENMASK(15, 8)
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#define CDNS_PDI_CONFIG_PORT GENMASK(4, 0)
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/* Driver defaults */
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#define CDNS_TX_TIMEOUT 2000
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#define CDNS_SCP_RX_FIFOLEVEL 0x2
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/*
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* register accessor helpers
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*/
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static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset)
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{
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return readl(cdns->registers + offset);
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}
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static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value)
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{
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writel(value, cdns->registers + offset);
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}
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static inline void cdns_updatel(struct sdw_cdns *cdns,
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int offset, u32 mask, u32 val)
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{
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u32 tmp;
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tmp = cdns_readl(cdns, offset);
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tmp = (tmp & ~mask) | val;
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cdns_writel(cdns, offset, tmp);
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}
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static int cdns_set_wait(struct sdw_cdns *cdns, int offset, u32 mask, u32 value)
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{
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int timeout = 10;
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u32 reg_read;
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/* Wait for bit to be set */
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do {
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reg_read = readl(cdns->registers + offset);
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if ((reg_read & mask) == value)
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return 0;
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timeout--;
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usleep_range(50, 100);
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} while (timeout != 0);
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return -ETIMEDOUT;
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}
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static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value)
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{
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writel(value, cdns->registers + offset);
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/* Wait for bit to be self cleared */
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return cdns_set_wait(cdns, offset, value, 0);
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}
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/*
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* all changes to the MCP_CONFIG, MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL
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* need to be confirmed with a write to MCP_CONFIG_UPDATE
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*/
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static int cdns_config_update(struct sdw_cdns *cdns)
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{
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int ret;
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if (sdw_cdns_is_clock_stop(cdns)) {
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dev_err(cdns->dev, "Cannot program MCP_CONFIG_UPDATE in ClockStopMode\n");
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return -EINVAL;
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}
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ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE,
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CDNS_MCP_CONFIG_UPDATE_BIT);
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if (ret < 0)
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dev_err(cdns->dev, "Config update timedout\n");
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return ret;
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}
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/*
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* debugfs
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*/
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#ifdef CONFIG_DEBUG_FS
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#define RD_BUF (2 * PAGE_SIZE)
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static ssize_t cdns_sprintf(struct sdw_cdns *cdns,
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char *buf, size_t pos, unsigned int reg)
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{
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return scnprintf(buf + pos, RD_BUF - pos,
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"%4x\t%8x\n", reg, cdns_readl(cdns, reg));
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}
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static int cdns_reg_show(struct seq_file *s, void *data)
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{
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struct sdw_cdns *cdns = s->private;
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char *buf;
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ssize_t ret;
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int num_ports;
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int i, j;
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buf = kzalloc(RD_BUF, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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ret = scnprintf(buf, RD_BUF, "Register Value\n");
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ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n");
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/* 8 MCP registers */
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for (i = CDNS_MCP_CONFIG; i <= CDNS_MCP_PHYCTRL; i += sizeof(u32))
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ret += cdns_sprintf(cdns, buf, ret, i);
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nStatus & Intr Registers\n");
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/* 13 Status & Intr registers (offsets 0x70 and 0x74 not defined) */
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for (i = CDNS_MCP_STAT; i <= CDNS_MCP_FIFOSTAT; i += sizeof(u32))
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ret += cdns_sprintf(cdns, buf, ret, i);
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nSSP & Clk ctrl Registers\n");
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ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0);
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ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1);
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ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0);
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ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1);
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nDPn B0 Registers\n");
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num_ports = cdns->num_ports;
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for (i = 0; i < num_ports; i++) {
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nDP-%d\n", i);
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for (j = CDNS_DPN_B0_CONFIG(i);
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j < CDNS_DPN_B0_ASYNC_CTRL(i); j += sizeof(u32))
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ret += cdns_sprintf(cdns, buf, ret, j);
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}
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nDPn B1 Registers\n");
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for (i = 0; i < num_ports; i++) {
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nDP-%d\n", i);
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for (j = CDNS_DPN_B1_CONFIG(i);
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j < CDNS_DPN_B1_ASYNC_CTRL(i); j += sizeof(u32))
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ret += cdns_sprintf(cdns, buf, ret, j);
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}
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nDPn Control Registers\n");
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for (i = 0; i < num_ports; i++)
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ret += cdns_sprintf(cdns, buf, ret,
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CDNS_PORTCTRL + i * CDNS_PORT_OFFSET);
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ret += scnprintf(buf + ret, RD_BUF - ret,
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"\nPDIn Config Registers\n");
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/* number of PDI and ports is interchangeable */
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for (i = 0; i < num_ports; i++)
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ret += cdns_sprintf(cdns, buf, ret, CDNS_PDI_CONFIG(i));
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seq_printf(s, "%s", buf);
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kfree(buf);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(cdns_reg);
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static int cdns_hw_reset(void *data, u64 value)
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{
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struct sdw_cdns *cdns = data;
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int ret;
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if (value != 1)
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return -EINVAL;
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/* Userspace changed the hardware state behind the kernel's back */
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add_taint(TAINT_USER, LOCKDEP_STILL_OK);
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ret = sdw_cdns_exit_reset(cdns);
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dev_dbg(cdns->dev, "link hw_reset done: %d\n", ret);
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return ret;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(cdns_hw_reset_fops, NULL, cdns_hw_reset, "%llu\n");
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/**
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* sdw_cdns_debugfs_init() - Cadence debugfs init
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* @cdns: Cadence instance
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* @root: debugfs root
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*/
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void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root)
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{
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debugfs_create_file("cdns-registers", 0400, root, cdns, &cdns_reg_fops);
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debugfs_create_file("cdns-hw-reset", 0200, root, cdns,
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&cdns_hw_reset_fops);
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}
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EXPORT_SYMBOL_GPL(sdw_cdns_debugfs_init);
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#endif /* CONFIG_DEBUG_FS */
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/*
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* IO Calls
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*/
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static enum sdw_command_response
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cdns_fill_msg_resp(struct sdw_cdns *cdns,
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struct sdw_msg *msg, int count, int offset)
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{
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int nack = 0, no_ack = 0;
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int i;
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/* check message response */
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for (i = 0; i < count; i++) {
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if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) {
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no_ack = 1;
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dev_dbg_ratelimited(cdns->dev, "Msg Ack not received\n");
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if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) {
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nack = 1;
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dev_err_ratelimited(cdns->dev, "Msg NACK received\n");
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}
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}
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}
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if (nack) {
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dev_err_ratelimited(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num);
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return SDW_CMD_FAIL;
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}
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if (no_ack) {
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dev_dbg_ratelimited(cdns->dev, "Msg ignored for Slave %d\n", msg->dev_num);
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return SDW_CMD_IGNORED;
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}
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/* fill response */
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for (i = 0; i < count; i++)
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msg->buf[i + offset] = cdns->response_buf[i] >>
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SDW_REG_SHIFT(CDNS_MCP_RESP_RDATA);
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return SDW_CMD_OK;
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}
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static enum sdw_command_response
|
|
_cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd,
|
|
int offset, int count, bool defer)
|
|
{
|
|
unsigned long time;
|
|
u32 base, i, data;
|
|
u16 addr;
|
|
|
|
/* Program the watermark level for RX FIFO */
|
|
if (cdns->msg_count != count) {
|
|
cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, count);
|
|
cdns->msg_count = count;
|
|
}
|
|
|
|
base = CDNS_MCP_CMD_BASE;
|
|
addr = msg->addr;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
data = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR);
|
|
data |= cmd << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND);
|
|
data |= addr++ << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L);
|
|
|
|
if (msg->flags == SDW_MSG_FLAG_WRITE)
|
|
data |= msg->buf[i + offset];
|
|
|
|
data |= msg->ssp_sync << SDW_REG_SHIFT(CDNS_MCP_CMD_SSP_TAG);
|
|
cdns_writel(cdns, base, data);
|
|
base += CDNS_MCP_CMD_WORD_LEN;
|
|
}
|
|
|
|
if (defer)
|
|
return SDW_CMD_OK;
|
|
|
|
/* wait for timeout or response */
|
|
time = wait_for_completion_timeout(&cdns->tx_complete,
|
|
msecs_to_jiffies(CDNS_TX_TIMEOUT));
|
|
if (!time) {
|
|
dev_err(cdns->dev, "IO transfer timed out, cmd %d device %d addr %x len %d\n",
|
|
cmd, msg->dev_num, msg->addr, msg->len);
|
|
msg->len = 0;
|
|
return SDW_CMD_TIMEOUT;
|
|
}
|
|
|
|
return cdns_fill_msg_resp(cdns, msg, count, offset);
|
|
}
|
|
|
|
static enum sdw_command_response
|
|
cdns_program_scp_addr(struct sdw_cdns *cdns, struct sdw_msg *msg)
|
|
{
|
|
int nack = 0, no_ack = 0;
|
|
unsigned long time;
|
|
u32 data[2], base;
|
|
int i;
|
|
|
|
/* Program the watermark level for RX FIFO */
|
|
if (cdns->msg_count != CDNS_SCP_RX_FIFOLEVEL) {
|
|
cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, CDNS_SCP_RX_FIFOLEVEL);
|
|
cdns->msg_count = CDNS_SCP_RX_FIFOLEVEL;
|
|
}
|
|
|
|
data[0] = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR);
|
|
data[0] |= 0x3 << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND);
|
|
data[1] = data[0];
|
|
|
|
data[0] |= SDW_SCP_ADDRPAGE1 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L);
|
|
data[1] |= SDW_SCP_ADDRPAGE2 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L);
|
|
|
|
data[0] |= msg->addr_page1;
|
|
data[1] |= msg->addr_page2;
|
|
|
|
base = CDNS_MCP_CMD_BASE;
|
|
cdns_writel(cdns, base, data[0]);
|
|
base += CDNS_MCP_CMD_WORD_LEN;
|
|
cdns_writel(cdns, base, data[1]);
|
|
|
|
time = wait_for_completion_timeout(&cdns->tx_complete,
|
|
msecs_to_jiffies(CDNS_TX_TIMEOUT));
|
|
if (!time) {
|
|
dev_err(cdns->dev, "SCP Msg trf timed out\n");
|
|
msg->len = 0;
|
|
return SDW_CMD_TIMEOUT;
|
|
}
|
|
|
|
/* check response the writes */
|
|
for (i = 0; i < 2; i++) {
|
|
if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) {
|
|
no_ack = 1;
|
|
dev_err(cdns->dev, "Program SCP Ack not received\n");
|
|
if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) {
|
|
nack = 1;
|
|
dev_err(cdns->dev, "Program SCP NACK received\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* For NACK, NO ack, don't return err if we are in Broadcast mode */
|
|
if (nack) {
|
|
dev_err_ratelimited(cdns->dev,
|
|
"SCP_addrpage NACKed for Slave %d\n", msg->dev_num);
|
|
return SDW_CMD_FAIL;
|
|
}
|
|
|
|
if (no_ack) {
|
|
dev_dbg_ratelimited(cdns->dev,
|
|
"SCP_addrpage ignored for Slave %d\n", msg->dev_num);
|
|
return SDW_CMD_IGNORED;
|
|
}
|
|
|
|
return SDW_CMD_OK;
|
|
}
|
|
|
|
static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd)
|
|
{
|
|
int ret;
|
|
|
|
if (msg->page) {
|
|
ret = cdns_program_scp_addr(cdns, msg);
|
|
if (ret) {
|
|
msg->len = 0;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
switch (msg->flags) {
|
|
case SDW_MSG_FLAG_READ:
|
|
*cmd = CDNS_MCP_CMD_READ;
|
|
break;
|
|
|
|
case SDW_MSG_FLAG_WRITE:
|
|
*cmd = CDNS_MCP_CMD_WRITE;
|
|
break;
|
|
|
|
default:
|
|
dev_err(cdns->dev, "Invalid msg cmd: %d\n", msg->flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
enum sdw_command_response
|
|
cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
int cmd = 0, ret, i;
|
|
|
|
ret = cdns_prep_msg(cdns, msg, &cmd);
|
|
if (ret)
|
|
return SDW_CMD_FAIL_OTHER;
|
|
|
|
for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) {
|
|
ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
|
|
CDNS_MCP_CMD_LEN, false);
|
|
if (ret < 0)
|
|
goto exit;
|
|
}
|
|
|
|
if (!(msg->len % CDNS_MCP_CMD_LEN))
|
|
goto exit;
|
|
|
|
ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
|
|
msg->len % CDNS_MCP_CMD_LEN, false);
|
|
|
|
exit:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(cdns_xfer_msg);
|
|
|
|
enum sdw_command_response
|
|
cdns_xfer_msg_defer(struct sdw_bus *bus,
|
|
struct sdw_msg *msg, struct sdw_defer *defer)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
int cmd = 0, ret;
|
|
|
|
/* for defer only 1 message is supported */
|
|
if (msg->len > 1)
|
|
return -ENOTSUPP;
|
|
|
|
ret = cdns_prep_msg(cdns, msg, &cmd);
|
|
if (ret)
|
|
return SDW_CMD_FAIL_OTHER;
|
|
|
|
cdns->defer = defer;
|
|
cdns->defer->length = msg->len;
|
|
|
|
return _cdns_xfer_msg(cdns, msg, cmd, 0, msg->len, true);
|
|
}
|
|
EXPORT_SYMBOL(cdns_xfer_msg_defer);
|
|
|
|
enum sdw_command_response
|
|
cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
struct sdw_msg msg;
|
|
|
|
/* Create dummy message with valid device number */
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.dev_num = dev_num;
|
|
|
|
return cdns_program_scp_addr(cdns, &msg);
|
|
}
|
|
EXPORT_SYMBOL(cdns_reset_page_addr);
|
|
|
|
/*
|
|
* IRQ handling
|
|
*/
|
|
|
|
static void cdns_read_response(struct sdw_cdns *cdns)
|
|
{
|
|
u32 num_resp, cmd_base;
|
|
int i;
|
|
|
|
num_resp = cdns_readl(cdns, CDNS_MCP_FIFOSTAT);
|
|
num_resp &= CDNS_MCP_RX_FIFO_AVAIL;
|
|
|
|
cmd_base = CDNS_MCP_CMD_BASE;
|
|
|
|
for (i = 0; i < num_resp; i++) {
|
|
cdns->response_buf[i] = cdns_readl(cdns, cmd_base);
|
|
cmd_base += CDNS_MCP_CMD_WORD_LEN;
|
|
}
|
|
}
|
|
|
|
static int cdns_update_slave_status(struct sdw_cdns *cdns,
|
|
u32 slave0, u32 slave1)
|
|
{
|
|
enum sdw_slave_status status[SDW_MAX_DEVICES + 1];
|
|
bool is_slave = false;
|
|
u64 slave;
|
|
u32 mask;
|
|
int i, set_status;
|
|
|
|
/* combine the two status */
|
|
slave = ((u64)slave1 << 32) | slave0;
|
|
memset(status, 0, sizeof(status));
|
|
|
|
for (i = 0; i <= SDW_MAX_DEVICES; i++) {
|
|
mask = (slave >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) &
|
|
CDNS_MCP_SLAVE_STATUS_BITS;
|
|
if (!mask)
|
|
continue;
|
|
|
|
is_slave = true;
|
|
set_status = 0;
|
|
|
|
if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) {
|
|
status[i] = SDW_SLAVE_RESERVED;
|
|
set_status++;
|
|
}
|
|
|
|
if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) {
|
|
status[i] = SDW_SLAVE_ATTACHED;
|
|
set_status++;
|
|
}
|
|
|
|
if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) {
|
|
status[i] = SDW_SLAVE_ALERT;
|
|
set_status++;
|
|
}
|
|
|
|
if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) {
|
|
status[i] = SDW_SLAVE_UNATTACHED;
|
|
set_status++;
|
|
}
|
|
|
|
/* first check if Slave reported multiple status */
|
|
if (set_status > 1) {
|
|
u32 val;
|
|
|
|
dev_warn_ratelimited(cdns->dev,
|
|
"Slave %d reported multiple Status: %d\n",
|
|
i, mask);
|
|
|
|
/* check latest status extracted from PING commands */
|
|
val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
|
|
val >>= (i * 2);
|
|
|
|
switch (val & 0x3) {
|
|
case 0:
|
|
status[i] = SDW_SLAVE_UNATTACHED;
|
|
break;
|
|
case 1:
|
|
status[i] = SDW_SLAVE_ATTACHED;
|
|
break;
|
|
case 2:
|
|
status[i] = SDW_SLAVE_ALERT;
|
|
break;
|
|
case 3:
|
|
default:
|
|
status[i] = SDW_SLAVE_RESERVED;
|
|
break;
|
|
}
|
|
|
|
dev_warn_ratelimited(cdns->dev,
|
|
"Slave %d status updated to %d\n",
|
|
i, status[i]);
|
|
|
|
}
|
|
}
|
|
|
|
if (is_slave)
|
|
return sdw_handle_slave_status(&cdns->bus, status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sdw_cdns_irq() - Cadence interrupt handler
|
|
* @irq: irq number
|
|
* @dev_id: irq context
|
|
*/
|
|
irqreturn_t sdw_cdns_irq(int irq, void *dev_id)
|
|
{
|
|
struct sdw_cdns *cdns = dev_id;
|
|
u32 int_status;
|
|
int ret = IRQ_HANDLED;
|
|
|
|
/* Check if the link is up */
|
|
if (!cdns->link_up)
|
|
return IRQ_NONE;
|
|
|
|
int_status = cdns_readl(cdns, CDNS_MCP_INTSTAT);
|
|
|
|
/* check for reserved values read as zero */
|
|
if (int_status & CDNS_MCP_INT_RESERVED)
|
|
return IRQ_NONE;
|
|
|
|
if (!(int_status & CDNS_MCP_INT_IRQ))
|
|
return IRQ_NONE;
|
|
|
|
if (int_status & CDNS_MCP_INT_RX_WL) {
|
|
cdns_read_response(cdns);
|
|
|
|
if (cdns->defer) {
|
|
cdns_fill_msg_resp(cdns, cdns->defer->msg,
|
|
cdns->defer->length, 0);
|
|
complete(&cdns->defer->complete);
|
|
cdns->defer = NULL;
|
|
} else {
|
|
complete(&cdns->tx_complete);
|
|
}
|
|
}
|
|
|
|
if (int_status & CDNS_MCP_INT_PARITY) {
|
|
/* Parity error detected by Master */
|
|
dev_err_ratelimited(cdns->dev, "Parity error\n");
|
|
}
|
|
|
|
if (int_status & CDNS_MCP_INT_CTRL_CLASH) {
|
|
/* Slave is driving bit slot during control word */
|
|
dev_err_ratelimited(cdns->dev, "Bus clash for control word\n");
|
|
}
|
|
|
|
if (int_status & CDNS_MCP_INT_DATA_CLASH) {
|
|
/*
|
|
* Multiple slaves trying to drive bit slot, or issue with
|
|
* ownership of data bits or Slave gone bonkers
|
|
*/
|
|
dev_err_ratelimited(cdns->dev, "Bus clash for data word\n");
|
|
}
|
|
|
|
if (int_status & CDNS_MCP_INT_SLAVE_MASK) {
|
|
/* Mask the Slave interrupt and wake thread */
|
|
cdns_updatel(cdns, CDNS_MCP_INTMASK,
|
|
CDNS_MCP_INT_SLAVE_MASK, 0);
|
|
|
|
int_status &= ~CDNS_MCP_INT_SLAVE_MASK;
|
|
ret = IRQ_WAKE_THREAD;
|
|
}
|
|
|
|
cdns_writel(cdns, CDNS_MCP_INTSTAT, int_status);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_irq);
|
|
|
|
/**
|
|
* sdw_cdns_thread() - Cadence irq thread handler
|
|
* @irq: irq number
|
|
* @dev_id: irq context
|
|
*/
|
|
irqreturn_t sdw_cdns_thread(int irq, void *dev_id)
|
|
{
|
|
struct sdw_cdns *cdns = dev_id;
|
|
u32 slave0, slave1;
|
|
|
|
dev_dbg_ratelimited(cdns->dev, "Slave status change\n");
|
|
|
|
slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
|
|
slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
|
|
|
|
cdns_update_slave_status(cdns, slave0, slave1);
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0);
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1);
|
|
|
|
/* clear and unmask Slave interrupt now */
|
|
cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK);
|
|
cdns_updatel(cdns, CDNS_MCP_INTMASK,
|
|
CDNS_MCP_INT_SLAVE_MASK, CDNS_MCP_INT_SLAVE_MASK);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_thread);
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/* program maximum length reset to be safe */
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_RST_DELAY,
|
|
CDNS_MCP_CONTROL_RST_DELAY);
|
|
|
|
/* use hardware generated reset */
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_HW_RST,
|
|
CDNS_MCP_CONTROL_HW_RST);
|
|
|
|
/* commit changes */
|
|
cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
|
|
CDNS_MCP_CONFIG_UPDATE_BIT,
|
|
CDNS_MCP_CONFIG_UPDATE_BIT);
|
|
|
|
/* don't wait here */
|
|
return 0;
|
|
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_exit_reset);
|
|
|
|
/**
|
|
* sdw_cdns_enable_slave_interrupt() - Enable SDW slave interrupts
|
|
* @cdns: Cadence instance
|
|
* @state: boolean for true/false
|
|
*/
|
|
static void cdns_enable_slave_interrupts(struct sdw_cdns *cdns, bool state)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = cdns_readl(cdns, CDNS_MCP_INTMASK);
|
|
if (state)
|
|
mask |= CDNS_MCP_INT_SLAVE_MASK;
|
|
else
|
|
mask &= ~CDNS_MCP_INT_SLAVE_MASK;
|
|
|
|
cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
u32 slave_intmask0 = 0;
|
|
u32 slave_intmask1 = 0;
|
|
u32 mask = 0;
|
|
|
|
if (!state)
|
|
goto update_masks;
|
|
|
|
slave_intmask0 = CDNS_MCP_SLAVE_INTMASK0_MASK;
|
|
slave_intmask1 = CDNS_MCP_SLAVE_INTMASK1_MASK;
|
|
|
|
/* enable detection of all slave state changes */
|
|
mask = CDNS_MCP_INT_SLAVE_MASK;
|
|
|
|
/* enable detection of bus issues */
|
|
mask |= CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH |
|
|
CDNS_MCP_INT_PARITY;
|
|
|
|
/* no detection of port interrupts for now */
|
|
|
|
/* enable detection of RX fifo level */
|
|
mask |= CDNS_MCP_INT_RX_WL;
|
|
|
|
/*
|
|
* CDNS_MCP_INT_IRQ needs to be set otherwise all previous
|
|
* settings are irrelevant
|
|
*/
|
|
mask |= CDNS_MCP_INT_IRQ;
|
|
|
|
if (interrupt_mask) /* parameter override */
|
|
mask = interrupt_mask;
|
|
|
|
update_masks:
|
|
/* clear slave interrupt status before enabling interrupt */
|
|
if (state) {
|
|
u32 slave_state;
|
|
|
|
slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state);
|
|
slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state);
|
|
}
|
|
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0);
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1);
|
|
cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_enable_interrupt);
|
|
|
|
static int cdns_allocate_pdi(struct sdw_cdns *cdns,
|
|
struct sdw_cdns_pdi **stream,
|
|
u32 num, u32 pdi_offset)
|
|
{
|
|
struct sdw_cdns_pdi *pdi;
|
|
int i;
|
|
|
|
if (!num)
|
|
return 0;
|
|
|
|
pdi = devm_kcalloc(cdns->dev, num, sizeof(*pdi), GFP_KERNEL);
|
|
if (!pdi)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
pdi[i].num = i + pdi_offset;
|
|
}
|
|
|
|
*stream = pdi;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct sdw_cdns_streams *stream;
|
|
int offset;
|
|
int ret;
|
|
|
|
cdns->pcm.num_bd = config.pcm_bd;
|
|
cdns->pcm.num_in = config.pcm_in;
|
|
cdns->pcm.num_out = config.pcm_out;
|
|
cdns->pdm.num_bd = config.pdm_bd;
|
|
cdns->pdm.num_in = config.pdm_in;
|
|
cdns->pdm.num_out = config.pdm_out;
|
|
|
|
/* Allocate PDIs for PCMs */
|
|
stream = &cdns->pcm;
|
|
|
|
/* we allocate PDI0 and PDI1 which are used for Bulk */
|
|
offset = 0;
|
|
|
|
ret = cdns_allocate_pdi(cdns, &stream->bd,
|
|
stream->num_bd, offset);
|
|
if (ret)
|
|
return ret;
|
|
|
|
offset += stream->num_bd;
|
|
|
|
ret = cdns_allocate_pdi(cdns, &stream->in,
|
|
stream->num_in, offset);
|
|
if (ret)
|
|
return ret;
|
|
|
|
offset += stream->num_in;
|
|
|
|
ret = cdns_allocate_pdi(cdns, &stream->out,
|
|
stream->num_out, offset);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Update total number of PCM PDIs */
|
|
stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out;
|
|
cdns->num_ports = stream->num_pdi;
|
|
|
|
/* Allocate PDIs for PDMs */
|
|
stream = &cdns->pdm;
|
|
ret = cdns_allocate_pdi(cdns, &stream->bd,
|
|
stream->num_bd, offset);
|
|
if (ret)
|
|
return ret;
|
|
|
|
offset += stream->num_bd;
|
|
|
|
ret = cdns_allocate_pdi(cdns, &stream->in,
|
|
stream->num_in, offset);
|
|
if (ret)
|
|
return ret;
|
|
|
|
offset += stream->num_in;
|
|
|
|
ret = cdns_allocate_pdi(cdns, &stream->out,
|
|
stream->num_out, offset);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Update total number of PDM PDIs */
|
|
stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out;
|
|
cdns->num_ports += stream->num_pdi;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_pdi_init);
|
|
|
|
static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols)
|
|
{
|
|
u32 val;
|
|
int c;
|
|
int r;
|
|
|
|
r = sdw_find_row_index(n_rows);
|
|
c = sdw_find_col_index(n_cols) & CDNS_MCP_FRAME_SHAPE_COL_MASK;
|
|
|
|
val = (r << CDNS_MCP_FRAME_SHAPE_ROW_OFFSET) | c;
|
|
|
|
return val;
|
|
}
|
|
|
|
static void cdns_init_clock_ctrl(struct sdw_cdns *cdns)
|
|
{
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
struct sdw_master_prop *prop = &bus->prop;
|
|
u32 val;
|
|
u32 ssp_interval;
|
|
int divider;
|
|
|
|
/* Set clock divider */
|
|
divider = (prop->mclk_freq / prop->max_clk_freq) - 1;
|
|
|
|
cdns_updatel(cdns, CDNS_MCP_CLK_CTRL0,
|
|
CDNS_MCP_CLK_MCLKD_MASK, divider);
|
|
cdns_updatel(cdns, CDNS_MCP_CLK_CTRL1,
|
|
CDNS_MCP_CLK_MCLKD_MASK, divider);
|
|
|
|
/*
|
|
* Frame shape changes after initialization have to be done
|
|
* with the bank switch mechanism
|
|
*/
|
|
val = cdns_set_initial_frame_shape(prop->default_row,
|
|
prop->default_col);
|
|
cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, val);
|
|
|
|
/* Set SSP interval to default value */
|
|
ssp_interval = prop->default_frame_rate / SDW_CADENCE_GSYNC_HZ;
|
|
cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, ssp_interval);
|
|
cdns_writel(cdns, CDNS_MCP_SSP_CTRL1, ssp_interval);
|
|
}
|
|
|
|
/**
|
|
* sdw_cdns_init() - Cadence initialization
|
|
* @cdns: Cadence instance
|
|
*/
|
|
int sdw_cdns_init(struct sdw_cdns *cdns)
|
|
{
|
|
u32 val;
|
|
|
|
cdns_init_clock_ctrl(cdns);
|
|
|
|
/* reset msg_count to default value of FIFOLEVEL */
|
|
cdns->msg_count = cdns_readl(cdns, CDNS_MCP_FIFOLEVEL);
|
|
|
|
/* flush command FIFOs */
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_RST,
|
|
CDNS_MCP_CONTROL_CMD_RST);
|
|
|
|
/* Set cmd accept mode */
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT,
|
|
CDNS_MCP_CONTROL_CMD_ACCEPT);
|
|
|
|
/* Configure mcp config */
|
|
val = cdns_readl(cdns, CDNS_MCP_CONFIG);
|
|
|
|
/* enable bus operations with clock and data */
|
|
val &= ~CDNS_MCP_CONFIG_OP;
|
|
val |= CDNS_MCP_CONFIG_OP_NORMAL;
|
|
|
|
/* Set cmd mode for Tx and Rx cmds */
|
|
val &= ~CDNS_MCP_CONFIG_CMD;
|
|
|
|
/* Disable sniffer mode */
|
|
val &= ~CDNS_MCP_CONFIG_SNIFFER;
|
|
|
|
/* Disable auto bus release */
|
|
val &= ~CDNS_MCP_CONFIG_BUS_REL;
|
|
|
|
if (cdns->bus.multi_link)
|
|
/* Set Multi-master mode to take gsync into account */
|
|
val |= CDNS_MCP_CONFIG_MMASTER;
|
|
|
|
/* leave frame delay to hardware default of 0x1F */
|
|
|
|
/* leave command retry to hardware default of 0 */
|
|
|
|
cdns_writel(cdns, CDNS_MCP_CONFIG, val);
|
|
|
|
/* changes will be committed later */
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_init);
|
|
|
|
int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params)
|
|
{
|
|
struct sdw_master_prop *prop = &bus->prop;
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
int mcp_clkctrl_off;
|
|
int divider;
|
|
|
|
if (!params->curr_dr_freq) {
|
|
dev_err(cdns->dev, "NULL curr_dr_freq\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
divider = prop->mclk_freq * SDW_DOUBLE_RATE_FACTOR /
|
|
params->curr_dr_freq;
|
|
divider--; /* divider is 1/(N+1) */
|
|
|
|
if (params->next_bank)
|
|
mcp_clkctrl_off = CDNS_MCP_CLK_CTRL1;
|
|
else
|
|
mcp_clkctrl_off = CDNS_MCP_CLK_CTRL0;
|
|
|
|
cdns_updatel(cdns, mcp_clkctrl_off, CDNS_MCP_CLK_MCLKD_MASK, divider);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(cdns_bus_conf);
|
|
|
|
static int cdns_port_params(struct sdw_bus *bus,
|
|
struct sdw_port_params *p_params, unsigned int bank)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
int dpn_config = 0, dpn_config_off;
|
|
|
|
if (bank)
|
|
dpn_config_off = CDNS_DPN_B1_CONFIG(p_params->num);
|
|
else
|
|
dpn_config_off = CDNS_DPN_B0_CONFIG(p_params->num);
|
|
|
|
dpn_config = cdns_readl(cdns, dpn_config_off);
|
|
|
|
dpn_config |= ((p_params->bps - 1) <<
|
|
SDW_REG_SHIFT(CDNS_DPN_CONFIG_WL));
|
|
dpn_config |= (p_params->flow_mode <<
|
|
SDW_REG_SHIFT(CDNS_DPN_CONFIG_PORT_FLOW));
|
|
dpn_config |= (p_params->data_mode <<
|
|
SDW_REG_SHIFT(CDNS_DPN_CONFIG_PORT_DAT));
|
|
|
|
cdns_writel(cdns, dpn_config_off, dpn_config);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdns_transport_params(struct sdw_bus *bus,
|
|
struct sdw_transport_params *t_params,
|
|
enum sdw_reg_bank bank)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
int dpn_offsetctrl = 0, dpn_offsetctrl_off;
|
|
int dpn_config = 0, dpn_config_off;
|
|
int dpn_hctrl = 0, dpn_hctrl_off;
|
|
int num = t_params->port_num;
|
|
int dpn_samplectrl_off;
|
|
|
|
/*
|
|
* Note: Only full data port is supported on the Master side for
|
|
* both PCM and PDM ports.
|
|
*/
|
|
|
|
if (bank) {
|
|
dpn_config_off = CDNS_DPN_B1_CONFIG(num);
|
|
dpn_samplectrl_off = CDNS_DPN_B1_SAMPLE_CTRL(num);
|
|
dpn_hctrl_off = CDNS_DPN_B1_HCTRL(num);
|
|
dpn_offsetctrl_off = CDNS_DPN_B1_OFFSET_CTRL(num);
|
|
} else {
|
|
dpn_config_off = CDNS_DPN_B0_CONFIG(num);
|
|
dpn_samplectrl_off = CDNS_DPN_B0_SAMPLE_CTRL(num);
|
|
dpn_hctrl_off = CDNS_DPN_B0_HCTRL(num);
|
|
dpn_offsetctrl_off = CDNS_DPN_B0_OFFSET_CTRL(num);
|
|
}
|
|
|
|
dpn_config = cdns_readl(cdns, dpn_config_off);
|
|
|
|
dpn_config |= (t_params->blk_grp_ctrl <<
|
|
SDW_REG_SHIFT(CDNS_DPN_CONFIG_BGC));
|
|
dpn_config |= (t_params->blk_pkg_mode <<
|
|
SDW_REG_SHIFT(CDNS_DPN_CONFIG_BPM));
|
|
cdns_writel(cdns, dpn_config_off, dpn_config);
|
|
|
|
dpn_offsetctrl |= (t_params->offset1 <<
|
|
SDW_REG_SHIFT(CDNS_DPN_OFFSET_CTRL_1));
|
|
dpn_offsetctrl |= (t_params->offset2 <<
|
|
SDW_REG_SHIFT(CDNS_DPN_OFFSET_CTRL_2));
|
|
cdns_writel(cdns, dpn_offsetctrl_off, dpn_offsetctrl);
|
|
|
|
dpn_hctrl |= (t_params->hstart <<
|
|
SDW_REG_SHIFT(CDNS_DPN_HCTRL_HSTART));
|
|
dpn_hctrl |= (t_params->hstop << SDW_REG_SHIFT(CDNS_DPN_HCTRL_HSTOP));
|
|
dpn_hctrl |= (t_params->lane_ctrl <<
|
|
SDW_REG_SHIFT(CDNS_DPN_HCTRL_LCTRL));
|
|
|
|
cdns_writel(cdns, dpn_hctrl_off, dpn_hctrl);
|
|
cdns_writel(cdns, dpn_samplectrl_off, (t_params->sample_interval - 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdns_port_enable(struct sdw_bus *bus,
|
|
struct sdw_enable_ch *enable_ch, unsigned int bank)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
int dpn_chnen_off, ch_mask;
|
|
|
|
if (bank)
|
|
dpn_chnen_off = CDNS_DPN_B1_CH_EN(enable_ch->port_num);
|
|
else
|
|
dpn_chnen_off = CDNS_DPN_B0_CH_EN(enable_ch->port_num);
|
|
|
|
ch_mask = enable_ch->ch_mask * enable_ch->enable;
|
|
cdns_writel(cdns, dpn_chnen_off, ch_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct sdw_master_port_ops cdns_port_ops = {
|
|
.dpn_set_port_params = cdns_port_params,
|
|
.dpn_set_port_transport_params = cdns_transport_params,
|
|
.dpn_port_enable_ch = cdns_port_enable,
|
|
};
|
|
|
|
/**
|
|
* sdw_cdns_is_clock_stop: Check clock status
|
|
*
|
|
* @cdns: Cadence instance
|
|
*/
|
|
bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns)
|
|
{
|
|
return !!(cdns_readl(cdns, CDNS_MCP_STAT) & CDNS_MCP_STAT_CLK_STOP);
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_is_clock_stop);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
bool slave_present = false;
|
|
struct sdw_slave *slave;
|
|
int ret;
|
|
|
|
/* Check suspend status */
|
|
if (sdw_cdns_is_clock_stop(cdns)) {
|
|
dev_dbg(cdns->dev, "Clock is already stopped\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Before entering clock stop we mask the Slave
|
|
* interrupts. This helps avoid having to deal with e.g. a
|
|
* Slave becoming UNATTACHED while the clock is being stopped
|
|
*/
|
|
cdns_enable_slave_interrupts(cdns, false);
|
|
|
|
/*
|
|
* For specific platforms, it is required to be able to put
|
|
* master into a state in which it ignores wake-up trials
|
|
* in clock stop state
|
|
*/
|
|
if (block_wake)
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_BLOCK_WAKEUP,
|
|
CDNS_MCP_CONTROL_BLOCK_WAKEUP);
|
|
|
|
list_for_each_entry(slave, &cdns->bus.slaves, node) {
|
|
if (slave->status == SDW_SLAVE_ATTACHED ||
|
|
slave->status == SDW_SLAVE_ALERT) {
|
|
slave_present = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This CMD_ACCEPT should be used when there are no devices
|
|
* attached on the link when entering clock stop mode. If this is
|
|
* not set and there is a broadcast write then the command ignored
|
|
* will be treated as a failure
|
|
*/
|
|
if (!slave_present)
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_CMD_ACCEPT,
|
|
CDNS_MCP_CONTROL_CMD_ACCEPT);
|
|
else
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_CMD_ACCEPT, 0);
|
|
|
|
/* commit changes */
|
|
ret = cdns_config_update(cdns);
|
|
if (ret < 0) {
|
|
dev_err(cdns->dev, "%s: config_update failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
/* Prepare slaves for clock stop */
|
|
ret = sdw_bus_prep_clk_stop(&cdns->bus);
|
|
if (ret < 0) {
|
|
dev_err(cdns->dev, "prepare clock stop failed %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Enter clock stop mode and only report errors if there are
|
|
* Slave devices present (ALERT or ATTACHED)
|
|
*/
|
|
ret = sdw_bus_clk_stop(&cdns->bus);
|
|
if (ret < 0 && slave_present && ret != -ENODATA) {
|
|
dev_err(cdns->dev, "bus clock stop failed %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = cdns_set_wait(cdns, CDNS_MCP_STAT,
|
|
CDNS_MCP_STAT_CLK_STOP,
|
|
CDNS_MCP_STAT_CLK_STOP);
|
|
if (ret < 0)
|
|
dev_err(cdns->dev, "Clock stop failed %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_clock_stop);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int ret;
|
|
|
|
/* unmask Slave interrupts that were masked when stopping the clock */
|
|
cdns_enable_slave_interrupts(cdns, true);
|
|
|
|
ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_CLK_STOP_CLR);
|
|
if (ret < 0) {
|
|
dev_err(cdns->dev, "Couldn't exit from clock stop\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = cdns_set_wait(cdns, CDNS_MCP_STAT, CDNS_MCP_STAT_CLK_STOP, 0);
|
|
if (ret < 0) {
|
|
dev_err(cdns->dev, "clock stop exit failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL,
|
|
CDNS_MCP_CONTROL_BLOCK_WAKEUP, 0);
|
|
|
|
/*
|
|
* clear CMD_ACCEPT so that the command ignored
|
|
* will be treated as a failure during a broadcast write
|
|
*/
|
|
cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT, 0);
|
|
|
|
if (!bus_reset) {
|
|
|
|
/* enable bus operations with clock and data */
|
|
cdns_updatel(cdns, CDNS_MCP_CONFIG,
|
|
CDNS_MCP_CONFIG_OP,
|
|
CDNS_MCP_CONFIG_OP_NORMAL);
|
|
|
|
ret = cdns_config_update(cdns);
|
|
if (ret < 0) {
|
|
dev_err(cdns->dev, "%s: config_update failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
ret = sdw_bus_exit_clk_stop(&cdns->bus);
|
|
if (ret < 0)
|
|
dev_err(cdns->dev, "bus failed to exit clock stop %d\n", ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_clock_restart);
|
|
|
|
/**
|
|
* sdw_cdns_probe() - Cadence probe routine
|
|
* @cdns: Cadence instance
|
|
*/
|
|
int sdw_cdns_probe(struct sdw_cdns *cdns)
|
|
{
|
|
init_completion(&cdns->tx_complete);
|
|
cdns->bus.port_ops = &cdns_port_ops;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_probe);
|
|
|
|
int cdns_set_sdw_stream(struct snd_soc_dai *dai,
|
|
void *stream, bool pcm, int direction)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
struct sdw_cdns_dma_data *dma;
|
|
|
|
dma = kzalloc(sizeof(*dma), GFP_KERNEL);
|
|
if (!dma)
|
|
return -ENOMEM;
|
|
|
|
if (pcm)
|
|
dma->stream_type = SDW_STREAM_PCM;
|
|
else
|
|
dma->stream_type = SDW_STREAM_PDM;
|
|
|
|
dma->bus = &cdns->bus;
|
|
dma->link_id = cdns->instance;
|
|
|
|
dma->stream = stream;
|
|
|
|
if (direction == SNDRV_PCM_STREAM_PLAYBACK)
|
|
dai->playback_dma_data = dma;
|
|
else
|
|
dai->capture_dma_data = dma;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(cdns_set_sdw_stream);
|
|
|
|
/**
|
|
* cdns_find_pdi() - Find a free PDI
|
|
*
|
|
* @cdns: Cadence instance
|
|
* @offset: Starting offset
|
|
* @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 offset,
|
|
unsigned int num,
|
|
struct sdw_cdns_pdi *pdi,
|
|
int dai_id)
|
|
{
|
|
int i;
|
|
|
|
for (i = offset; i < offset + num; i++)
|
|
if (pdi[i].num == dai_id)
|
|
return &pdi[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
u32 offset, val = 0;
|
|
|
|
if (dir == SDW_DATA_DIR_RX)
|
|
val = CDNS_PORTCTRL_DIRN;
|
|
|
|
offset = CDNS_PORTCTRL + pdi->num * CDNS_PORT_OFFSET;
|
|
cdns_updatel(cdns, offset, CDNS_PORTCTRL_DIRN, val);
|
|
|
|
val = pdi->num;
|
|
val |= CDNS_PDI_CONFIG_SOFT_RESET;
|
|
val |= ((1 << ch) - 1) << SDW_REG_SHIFT(CDNS_PDI_CONFIG_CHANNEL);
|
|
cdns_writel(cdns, CDNS_PDI_CONFIG(pdi->num), val);
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_config_stream);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct sdw_cdns_pdi *pdi = NULL;
|
|
|
|
if (dir == SDW_DATA_DIR_RX)
|
|
pdi = cdns_find_pdi(cdns, 0, stream->num_in, stream->in,
|
|
dai_id);
|
|
else
|
|
pdi = cdns_find_pdi(cdns, 0, stream->num_out, stream->out,
|
|
dai_id);
|
|
|
|
/* check if we found a PDI, else find in bi-directional */
|
|
if (!pdi)
|
|
pdi = cdns_find_pdi(cdns, 2, stream->num_bd, stream->bd,
|
|
dai_id);
|
|
|
|
if (pdi) {
|
|
pdi->l_ch_num = 0;
|
|
pdi->h_ch_num = ch - 1;
|
|
pdi->dir = dir;
|
|
pdi->ch_count = ch;
|
|
}
|
|
|
|
return pdi;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_alloc_pdi);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("Cadence Soundwire Library");
|