mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
956baa1992
Implement sdw_master_ops with support for xfer_msg, xfer_msg_defer and reset_page_addr. Since Cadence module doesn't know the systems it will be used, set the read_prop to the bus helper. Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
752 lines
19 KiB
C
752 lines
19 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/interrupt.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 "bus.h"
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#include "cadence_master.h"
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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_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_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_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_CMD_ERR BIT(7)
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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_INTSET 0x4C
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#define CDNS_SDW_SLAVE_STAT 0x50
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#define CDNS_MCP_SLAVE_STAT_MASK BIT(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(30, 0)
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#define CDNS_MCP_SLAVE_INTMASK1_MASK GENMASK(16, 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_DEFAULT_CLK_DIVIDER 0
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#define CDNS_DEFAULT_FRAME_SHAPE 0x30
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#define CDNS_DEFAULT_SSP_INTERVAL 0x18
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#define CDNS_TX_TIMEOUT 2000
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#define CDNS_PCM_PDI_OFFSET 0x2
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#define CDNS_PDM_PDI_OFFSET 0x6
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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_clear_bit(struct sdw_cdns *cdns, int offset, u32 value)
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{
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int timeout = 10;
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u32 reg_read;
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writel(value, cdns->registers + offset);
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/* Wait for bit to be self cleared */
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do {
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reg_read = readl(cdns->registers + offset);
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if ((reg_read & value) == 0)
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return 0;
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timeout--;
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udelay(50);
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} while (timeout != 0);
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return -EAGAIN;
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}
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/*
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* IO Calls
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*/
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static enum sdw_command_response cdns_fill_msg_resp(
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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(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(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(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num);
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return SDW_CMD_FAIL;
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} else if (no_ack) {
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dev_dbg(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
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_cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd,
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int offset, int count, bool defer)
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{
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unsigned long time;
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u32 base, i, data;
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u16 addr;
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/* Program the watermark level for RX FIFO */
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if (cdns->msg_count != count) {
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cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, count);
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cdns->msg_count = count;
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}
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base = CDNS_MCP_CMD_BASE;
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addr = msg->addr;
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for (i = 0; i < count; i++) {
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data = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR);
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data |= cmd << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND);
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data |= addr++ << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L);
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if (msg->flags == SDW_MSG_FLAG_WRITE)
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data |= msg->buf[i + offset];
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data |= msg->ssp_sync << SDW_REG_SHIFT(CDNS_MCP_CMD_SSP_TAG);
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cdns_writel(cdns, base, data);
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base += CDNS_MCP_CMD_WORD_LEN;
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}
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if (defer)
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return SDW_CMD_OK;
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/* wait for timeout or response */
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time = wait_for_completion_timeout(&cdns->tx_complete,
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msecs_to_jiffies(CDNS_TX_TIMEOUT));
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if (!time) {
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dev_err(cdns->dev, "IO transfer timed out\n");
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msg->len = 0;
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return SDW_CMD_TIMEOUT;
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}
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return cdns_fill_msg_resp(cdns, msg, count, offset);
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}
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static enum sdw_command_response cdns_program_scp_addr(
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struct sdw_cdns *cdns, struct sdw_msg *msg)
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{
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int nack = 0, no_ack = 0;
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unsigned long time;
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u32 data[2], base;
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int i;
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/* Program the watermark level for RX FIFO */
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if (cdns->msg_count != CDNS_SCP_RX_FIFOLEVEL) {
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cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, CDNS_SCP_RX_FIFOLEVEL);
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cdns->msg_count = CDNS_SCP_RX_FIFOLEVEL;
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}
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data[0] = msg->dev_num << SDW_REG_SHIFT(CDNS_MCP_CMD_DEV_ADDR);
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data[0] |= 0x3 << SDW_REG_SHIFT(CDNS_MCP_CMD_COMMAND);
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data[1] = data[0];
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data[0] |= SDW_SCP_ADDRPAGE1 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L);
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data[1] |= SDW_SCP_ADDRPAGE2 << SDW_REG_SHIFT(CDNS_MCP_CMD_REG_ADDR_L);
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data[0] |= msg->addr_page1;
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data[1] |= msg->addr_page2;
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base = CDNS_MCP_CMD_BASE;
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cdns_writel(cdns, base, data[0]);
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base += CDNS_MCP_CMD_WORD_LEN;
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cdns_writel(cdns, base, data[1]);
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time = wait_for_completion_timeout(&cdns->tx_complete,
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msecs_to_jiffies(CDNS_TX_TIMEOUT));
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if (!time) {
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dev_err(cdns->dev, "SCP Msg trf timed out\n");
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msg->len = 0;
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return SDW_CMD_TIMEOUT;
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}
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/* check response the writes */
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for (i = 0; i < 2; 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_err(cdns->dev, "Program SCP Ack not received");
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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(cdns->dev, "Program SCP NACK received");
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}
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}
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}
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/* For NACK, NO ack, don't return err if we are in Broadcast mode */
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if (nack) {
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dev_err(cdns->dev,
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"SCP_addrpage NACKed for Slave %d", msg->dev_num);
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return SDW_CMD_FAIL;
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} else if (no_ack) {
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dev_dbg(cdns->dev,
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"SCP_addrpage ignored for Slave %d", msg->dev_num);
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return SDW_CMD_IGNORED;
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}
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return SDW_CMD_OK;
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}
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static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd)
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{
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int ret;
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if (msg->page) {
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ret = cdns_program_scp_addr(cdns, msg);
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if (ret) {
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msg->len = 0;
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return ret;
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}
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}
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switch (msg->flags) {
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case SDW_MSG_FLAG_READ:
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*cmd = CDNS_MCP_CMD_READ;
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break;
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case SDW_MSG_FLAG_WRITE:
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*cmd = CDNS_MCP_CMD_WRITE;
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break;
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default:
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dev_err(cdns->dev, "Invalid msg cmd: %d\n", msg->flags);
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return -EINVAL;
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}
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return 0;
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}
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static enum sdw_command_response
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cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
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{
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struct sdw_cdns *cdns = bus_to_cdns(bus);
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int cmd = 0, ret, i;
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ret = cdns_prep_msg(cdns, msg, &cmd);
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if (ret)
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return SDW_CMD_FAIL_OTHER;
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for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) {
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ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
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CDNS_MCP_CMD_LEN, false);
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if (ret < 0)
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goto exit;
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}
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if (!(msg->len % CDNS_MCP_CMD_LEN))
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goto exit;
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ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
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msg->len % CDNS_MCP_CMD_LEN, false);
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exit:
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return ret;
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}
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static enum sdw_command_response
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cdns_xfer_msg_defer(struct sdw_bus *bus,
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struct sdw_msg *msg, struct sdw_defer *defer)
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{
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struct sdw_cdns *cdns = bus_to_cdns(bus);
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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);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
/*
|
|
* 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, 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) {
|
|
dev_warn(cdns->dev,
|
|
"Slave reported multiple Status: %d\n",
|
|
status[i]);
|
|
/*
|
|
* TODO: we need to reread the status here by
|
|
* issuing a PING cmd
|
|
*/
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
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_CTRL_CLASH) {
|
|
|
|
/* Slave is driving bit slot during control word */
|
|
dev_err_ratelimited(cdns->dev, "Bus clash for control word\n");
|
|
int_status |= CDNS_MCP_INT_CTRL_CLASH;
|
|
}
|
|
|
|
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");
|
|
int_status |= CDNS_MCP_INT_DATA_CLASH;
|
|
}
|
|
|
|
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(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
|
|
*/
|
|
static int _cdns_enable_interrupt(struct sdw_cdns *cdns)
|
|
{
|
|
u32 mask;
|
|
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0,
|
|
CDNS_MCP_SLAVE_INTMASK0_MASK);
|
|
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1,
|
|
CDNS_MCP_SLAVE_INTMASK1_MASK);
|
|
|
|
mask = CDNS_MCP_INT_SLAVE_RSVD | CDNS_MCP_INT_SLAVE_ALERT |
|
|
CDNS_MCP_INT_SLAVE_ATTACH | CDNS_MCP_INT_SLAVE_NATTACH |
|
|
CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH |
|
|
CDNS_MCP_INT_RX_WL | CDNS_MCP_INT_IRQ | CDNS_MCP_INT_DPINT;
|
|
|
|
cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sdw_cdns_enable_interrupt() - Enable SDW interrupts and update config
|
|
* @cdns: Cadence instance
|
|
*/
|
|
int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns)
|
|
{
|
|
int ret;
|
|
|
|
_cdns_enable_interrupt(cdns);
|
|
ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE,
|
|
CDNS_MCP_CONFIG_UPDATE_BIT);
|
|
if (ret < 0)
|
|
dev_err(cdns->dev, "Config update timedout");
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_enable_interrupt);
|
|
|
|
/**
|
|
* sdw_cdns_init() - Cadence initialization
|
|
* @cdns: Cadence instance
|
|
*/
|
|
int sdw_cdns_init(struct sdw_cdns *cdns)
|
|
{
|
|
u32 val;
|
|
int ret;
|
|
|
|
/* Exit clock stop */
|
|
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;
|
|
}
|
|
|
|
/* Set clock divider */
|
|
val = cdns_readl(cdns, CDNS_MCP_CLK_CTRL0);
|
|
val |= CDNS_DEFAULT_CLK_DIVIDER;
|
|
cdns_writel(cdns, CDNS_MCP_CLK_CTRL0, val);
|
|
|
|
/* Set the default frame shape */
|
|
cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, CDNS_DEFAULT_FRAME_SHAPE);
|
|
|
|
/* Set SSP interval to default value */
|
|
cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, CDNS_DEFAULT_SSP_INTERVAL);
|
|
cdns_writel(cdns, CDNS_MCP_SSP_CTRL1, CDNS_DEFAULT_SSP_INTERVAL);
|
|
|
|
/* 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);
|
|
|
|
/* Set Max cmd retry to 15 */
|
|
val |= CDNS_MCP_CONFIG_MCMD_RETRY;
|
|
|
|
/* Set frame delay between PREQ and ping frame to 15 frames */
|
|
val |= 0xF << SDW_REG_SHIFT(CDNS_MCP_CONFIG_MPREQ_DELAY);
|
|
|
|
/* Disable auto bus release */
|
|
val &= ~CDNS_MCP_CONFIG_BUS_REL;
|
|
|
|
/* Disable sniffer mode */
|
|
val &= ~CDNS_MCP_CONFIG_SNIFFER;
|
|
|
|
/* Set cmd mode for Tx and Rx cmds */
|
|
val &= ~CDNS_MCP_CONFIG_CMD;
|
|
|
|
/* Set operation to normal */
|
|
val &= ~CDNS_MCP_CONFIG_OP;
|
|
val |= CDNS_MCP_CONFIG_OP_NORMAL;
|
|
|
|
cdns_writel(cdns, CDNS_MCP_CONFIG, val);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_init);
|
|
|
|
struct sdw_master_ops sdw_cdns_master_ops = {
|
|
.read_prop = sdw_master_read_prop,
|
|
.xfer_msg = cdns_xfer_msg,
|
|
.xfer_msg_defer = cdns_xfer_msg_defer,
|
|
.reset_page_addr = cdns_reset_page_addr,
|
|
};
|
|
EXPORT_SYMBOL(sdw_cdns_master_ops);
|
|
|
|
/**
|
|
* sdw_cdns_probe() - Cadence probe routine
|
|
* @cdns: Cadence instance
|
|
*/
|
|
int sdw_cdns_probe(struct sdw_cdns *cdns)
|
|
{
|
|
init_completion(&cdns->tx_complete);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_cdns_probe);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("Cadence Soundwire Library");
|