| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Vinod Koul | 3199 | 58.37% | 3 | 15.79% |
| Sanyog Kale | 1418 | 25.87% | 1 | 5.26% |
| Pierre-Louis Bossart | 833 | 15.20% | 12 | 63.16% |
| Shreyas NC | 15 | 0.27% | 1 | 5.26% |
| Rander Wang | 13 | 0.24% | 1 | 5.26% |
| Jan Kotas | 3 | 0.05% | 1 | 5.26% |
| Total | 5481 | 19 |
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) // Copyright(c) 2015-17 Intel Corporation. /* * Cadence SoundWire Master module * Used by Master driver */ #include <linux/delay.h> #include <linux/device.h> #include <linux/debugfs.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/soundwire/sdw_registers.h> #include <linux/soundwire/sdw.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include "bus.h" #include "cadence_master.h" static int interrupt_mask; module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444); MODULE_PARM_DESC(cdns_mcp_int_mask, "Cadence MCP IntMask"); #define CDNS_MCP_CONFIG 0x0 #define CDNS_MCP_CONFIG_MCMD_RETRY GENMASK(27, 24) #define CDNS_MCP_CONFIG_MPREQ_DELAY GENMASK(20, 16) #define CDNS_MCP_CONFIG_MMASTER BIT(7) #define CDNS_MCP_CONFIG_BUS_REL BIT(6) #define CDNS_MCP_CONFIG_SNIFFER BIT(5) #define CDNS_MCP_CONFIG_SSPMOD BIT(4) #define CDNS_MCP_CONFIG_CMD BIT(3) #define CDNS_MCP_CONFIG_OP GENMASK(2, 0) #define CDNS_MCP_CONFIG_OP_NORMAL 0 #define CDNS_MCP_CONTROL 0x4 #define CDNS_MCP_CONTROL_RST_DELAY GENMASK(10, 8) #define CDNS_MCP_CONTROL_CMD_RST BIT(7) #define CDNS_MCP_CONTROL_SOFT_RST BIT(6) #define CDNS_MCP_CONTROL_SW_RST BIT(5) #define CDNS_MCP_CONTROL_HW_RST BIT(4) #define CDNS_MCP_CONTROL_CLK_PAUSE BIT(3) #define CDNS_MCP_CONTROL_CLK_STOP_CLR BIT(2) #define CDNS_MCP_CONTROL_CMD_ACCEPT BIT(1) #define CDNS_MCP_CONTROL_BLOCK_WAKEUP BIT(0) #define CDNS_MCP_CMDCTRL 0x8 #define CDNS_MCP_SSPSTAT 0xC #define CDNS_MCP_FRAME_SHAPE 0x10 #define CDNS_MCP_FRAME_SHAPE_INIT 0x14 #define CDNS_MCP_FRAME_SHAPE_COL_MASK GENMASK(2, 0) #define CDNS_MCP_FRAME_SHAPE_ROW_OFFSET 3 #define CDNS_MCP_CONFIG_UPDATE 0x18 #define CDNS_MCP_CONFIG_UPDATE_BIT BIT(0) #define CDNS_MCP_PHYCTRL 0x1C #define CDNS_MCP_SSP_CTRL0 0x20 #define CDNS_MCP_SSP_CTRL1 0x28 #define CDNS_MCP_CLK_CTRL0 0x30 #define CDNS_MCP_CLK_CTRL1 0x38 #define CDNS_MCP_CLK_MCLKD_MASK GENMASK(7, 0) #define CDNS_MCP_STAT 0x40 #define CDNS_MCP_STAT_ACTIVE_BANK BIT(20) #define CDNS_MCP_STAT_CLK_STOP BIT(16) #define CDNS_MCP_INTSTAT 0x44 #define CDNS_MCP_INTMASK 0x48 #define CDNS_MCP_INT_IRQ BIT(31) #define CDNS_MCP_INT_WAKEUP BIT(16) #define CDNS_MCP_INT_SLAVE_RSVD BIT(15) #define CDNS_MCP_INT_SLAVE_ALERT BIT(14) #define CDNS_MCP_INT_SLAVE_ATTACH BIT(13) #define CDNS_MCP_INT_SLAVE_NATTACH BIT(12) #define CDNS_MCP_INT_SLAVE_MASK GENMASK(15, 12) #define CDNS_MCP_INT_DPINT BIT(11) #define CDNS_MCP_INT_CTRL_CLASH BIT(10) #define CDNS_MCP_INT_DATA_CLASH BIT(9) #define CDNS_MCP_INT_PARITY BIT(8) #define CDNS_MCP_INT_CMD_ERR BIT(7) #define CDNS_MCP_INT_RX_NE BIT(3) #define CDNS_MCP_INT_RX_WL BIT(2) #define CDNS_MCP_INT_TXE BIT(1) #define CDNS_MCP_INT_TXF BIT(0) #define CDNS_MCP_INTSET 0x4C #define CDNS_MCP_SLAVE_STAT 0x50 #define CDNS_MCP_SLAVE_STAT_MASK GENMASK(1, 0) #define CDNS_MCP_SLAVE_INTSTAT0 0x54 #define CDNS_MCP_SLAVE_INTSTAT1 0x58 #define CDNS_MCP_SLAVE_INTSTAT_NPRESENT BIT(0) #define CDNS_MCP_SLAVE_INTSTAT_ATTACHED BIT(1) #define CDNS_MCP_SLAVE_INTSTAT_ALERT BIT(2) #define CDNS_MCP_SLAVE_INTSTAT_RESERVED BIT(3) #define CDNS_MCP_SLAVE_STATUS_BITS GENMASK(3, 0) #define CDNS_MCP_SLAVE_STATUS_NUM 4 #define CDNS_MCP_SLAVE_INTMASK0 0x5C #define CDNS_MCP_SLAVE_INTMASK1 0x60 #define CDNS_MCP_SLAVE_INTMASK0_MASK GENMASK(31, 0) #define CDNS_MCP_SLAVE_INTMASK1_MASK GENMASK(15, 0) #define CDNS_MCP_PORT_INTSTAT 0x64 #define CDNS_MCP_PDI_STAT 0x6C #define CDNS_MCP_FIFOLEVEL 0x78 #define CDNS_MCP_FIFOSTAT 0x7C #define CDNS_MCP_RX_FIFO_AVAIL GENMASK(5, 0) #define CDNS_MCP_CMD_BASE 0x80 #define CDNS_MCP_RESP_BASE 0x80 #define CDNS_MCP_CMD_LEN 0x20 #define CDNS_MCP_CMD_WORD_LEN 0x4 #define CDNS_MCP_CMD_SSP_TAG BIT(31) #define CDNS_MCP_CMD_COMMAND GENMASK(30, 28) #define CDNS_MCP_CMD_DEV_ADDR GENMASK(27, 24) #define CDNS_MCP_CMD_REG_ADDR_H GENMASK(23, 16) #define CDNS_MCP_CMD_REG_ADDR_L GENMASK(15, 8) #define CDNS_MCP_CMD_REG_DATA GENMASK(7, 0) #define CDNS_MCP_CMD_READ 2 #define CDNS_MCP_CMD_WRITE 3 #define CDNS_MCP_RESP_RDATA GENMASK(15, 8) #define CDNS_MCP_RESP_ACK BIT(0) #define CDNS_MCP_RESP_NACK BIT(1) #define CDNS_DP_SIZE 128 #define CDNS_DPN_B0_CONFIG(n) (0x100 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B0_CH_EN(n) (0x104 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B0_SAMPLE_CTRL(n) (0x108 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B0_OFFSET_CTRL(n) (0x10C + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B0_HCTRL(n) (0x110 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B0_ASYNC_CTRL(n) (0x114 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B1_CONFIG(n) (0x118 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B1_CH_EN(n) (0x11C + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B1_SAMPLE_CTRL(n) (0x120 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B1_OFFSET_CTRL(n) (0x124 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B1_HCTRL(n) (0x128 + CDNS_DP_SIZE * (n)) #define CDNS_DPN_B1_ASYNC_CTRL(n) (0x12C + CDNS_DP_SIZE * (n)) #define CDNS_DPN_CONFIG_BPM BIT(18) #define CDNS_DPN_CONFIG_BGC GENMASK(17, 16) #define CDNS_DPN_CONFIG_WL GENMASK(12, 8) #define CDNS_DPN_CONFIG_PORT_DAT GENMASK(3, 2) #define CDNS_DPN_CONFIG_PORT_FLOW GENMASK(1, 0) #define CDNS_DPN_SAMPLE_CTRL_SI GENMASK(15, 0) #define CDNS_DPN_OFFSET_CTRL_1 GENMASK(7, 0) #define CDNS_DPN_OFFSET_CTRL_2 GENMASK(15, 8) #define CDNS_DPN_HCTRL_HSTOP GENMASK(3, 0) #define CDNS_DPN_HCTRL_HSTART GENMASK(7, 4) #define CDNS_DPN_HCTRL_LCTRL GENMASK(10, 8) #define CDNS_PORTCTRL 0x130 #define CDNS_PORTCTRL_DIRN BIT(7) #define CDNS_PORTCTRL_BANK_INVERT BIT(8) #define CDNS_PORT_OFFSET 0x80 #define CDNS_PDI_CONFIG(n) (0x1100 + (n) * 16) #define CDNS_PDI_CONFIG_SOFT_RESET BIT(24) #define CDNS_PDI_CONFIG_CHANNEL GENMASK(15, 8) #define CDNS_PDI_CONFIG_PORT GENMASK(4, 0) /* Driver defaults */ #define CDNS_DEFAULT_SSP_INTERVAL 0x18 #define CDNS_TX_TIMEOUT 2000 #define CDNS_PCM_PDI_OFFSET 0x2 #define CDNS_PDM_PDI_OFFSET 0x6 #define CDNS_SCP_RX_FIFOLEVEL 0x2 /* * register accessor helpers */ static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset) { return readl(cdns->registers + offset); } static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value) { writel(value, cdns->registers + offset); } static inline void cdns_updatel(struct sdw_cdns *cdns, int offset, u32 mask, u32 val) { u32 tmp; tmp = cdns_readl(cdns, offset); tmp = (tmp & ~mask) | val; cdns_writel(cdns, offset, tmp); } static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value) { int timeout = 10; u32 reg_read; writel(value, cdns->registers + offset); /* Wait for bit to be self cleared */ do { reg_read = readl(cdns->registers + offset); if ((reg_read & value) == 0) return 0; timeout--; udelay(50); } while (timeout != 0); return -EAGAIN; } /* * debugfs */ #ifdef CONFIG_DEBUG_FS #define RD_BUF (2 * PAGE_SIZE) static ssize_t cdns_sprintf(struct sdw_cdns *cdns, char *buf, size_t pos, unsigned int reg) { return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%8x\n", reg, cdns_readl(cdns, reg)); } static int cdns_reg_show(struct seq_file *s, void *data) { struct sdw_cdns *cdns = s->private; char *buf; ssize_t ret; int num_ports; int i, j; buf = kzalloc(RD_BUF, GFP_KERNEL); if (!buf) return -ENOMEM; ret = scnprintf(buf, RD_BUF, "Register Value\n"); ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n"); /* 8 MCP registers */ for (i = CDNS_MCP_CONFIG; i <= CDNS_MCP_PHYCTRL; i += sizeof(u32)) ret += cdns_sprintf(cdns, buf, ret, i); ret += scnprintf(buf + ret, RD_BUF - ret, "\nStatus & Intr Registers\n"); /* 13 Status & Intr registers (offsets 0x70 and 0x74 not defined) */ for (i = CDNS_MCP_STAT; i <= CDNS_MCP_FIFOSTAT; i += sizeof(u32)) ret += cdns_sprintf(cdns, buf, ret, i); ret += scnprintf(buf + ret, RD_BUF - ret, "\nSSP & Clk ctrl Registers\n"); ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0); ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1); ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0); ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1); ret += scnprintf(buf + ret, RD_BUF - ret, "\nDPn B0 Registers\n"); /* * in sdw_cdns_pdi_init() we filter out the Bulk PDIs, * so the indices need to be corrected again */ num_ports = cdns->num_ports + CDNS_PCM_PDI_OFFSET; for (i = 0; i < num_ports; i++) { ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP-%d\n", i); for (j = CDNS_DPN_B0_CONFIG(i); j < CDNS_DPN_B0_ASYNC_CTRL(i); j += sizeof(u32)) ret += cdns_sprintf(cdns, buf, ret, j); } ret += scnprintf(buf + ret, RD_BUF - ret, "\nDPn B1 Registers\n"); for (i = 0; i < num_ports; i++) { ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP-%d\n", i); for (j = CDNS_DPN_B1_CONFIG(i); j < CDNS_DPN_B1_ASYNC_CTRL(i); j += sizeof(u32)) ret += cdns_sprintf(cdns, buf, ret, j); } ret += scnprintf(buf + ret, RD_BUF - ret, "\nDPn Control Registers\n"); for (i = 0; i < num_ports; i++) ret += cdns_sprintf(cdns, buf, ret, CDNS_PORTCTRL + i * CDNS_PORT_OFFSET); ret += scnprintf(buf + ret, RD_BUF - ret, "\nPDIn Config Registers\n"); /* number of PDI and ports is interchangeable */ for (i = 0; i < num_ports; i++) ret += cdns_sprintf(cdns, buf, ret, CDNS_PDI_CONFIG(i)); seq_printf(s, "%s", buf); kfree(buf); return 0; } DEFINE_SHOW_ATTRIBUTE(cdns_reg); /** * sdw_cdns_debugfs_init() - Cadence debugfs init * @cdns: Cadence instance * @root: debugfs root */ void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root) { debugfs_create_file("cdns-registers", 0400, root, cdns, &cdns_reg_fops); } EXPORT_SYMBOL_GPL(sdw_cdns_debugfs_init); #endif /* CONFIG_DEBUG_FS */ /* * IO Calls */ static enum sdw_command_response cdns_fill_msg_resp(struct sdw_cdns *cdns, struct sdw_msg *msg, int count, int offset) { int nack = 0, no_ack = 0; int i; /* check message response */ for (i = 0; i < count; i++) { if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) { no_ack = 1; dev_dbg_ratelimited(cdns->dev, "Msg Ack not received\n"); if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) { nack = 1; dev_err_ratelimited(cdns->dev, "Msg NACK received\n"); } } } if (nack) { dev_err_ratelimited(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num); return SDW_CMD_FAIL; } else if (no_ack) { dev_dbg_ratelimited(cdns->dev, "Msg ignored for Slave %d\n", msg->dev_num); return SDW_CMD_IGNORED; } /* fill response */ for (i = 0; i < count; i++) msg->buf[i + offset] = cdns->response_buf[i] >> SDW_REG_SHIFT(CDNS_MCP_RESP_RDATA); return SDW_CMD_OK; } 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\n"); 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; } else 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) { dev_warn_ratelimited(cdns->dev, "Slave reported multiple Status: %d\n", mask); /* * 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_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 */ 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); /* 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; 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\n"); return ret; } 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; pdi[i].assigned = false; } *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, i, 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; /* First two PDIs are reserved for bulk transfers */ if (stream->num_bd < CDNS_PCM_PDI_OFFSET) return -EINVAL; stream->num_bd -= CDNS_PCM_PDI_OFFSET; offset = CDNS_PCM_PDI_OFFSET; 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; offset = CDNS_PDM_PDI_OFFSET; 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; cdns->ports = devm_kcalloc(cdns->dev, cdns->num_ports, sizeof(*cdns->ports), GFP_KERNEL); if (!cdns->ports) { ret = -ENOMEM; return ret; } for (i = 0; i < cdns->num_ports; i++) { cdns->ports[i].assigned = false; cdns->ports[i].num = i + 1; /* Port 0 reserved for bulk */ } 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; } /** * sdw_cdns_init() - Cadence initialization * @cdns: Cadence instance */ int sdw_cdns_init(struct sdw_cdns *cdns) { struct sdw_bus *bus = &cdns->bus; struct sdw_master_prop *prop = &bus->prop; u32 val; int divider; 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 */ 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 */ 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); 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_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 * @num: Number of PDIs * @pdi: PDI instances * * Find and return a free PDI for a given PDI array */ static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns, unsigned int num, struct sdw_cdns_pdi *pdi) { int i; for (i = 0; i < num; i++) { if (pdi[i].assigned) continue; pdi[i].assigned = true; return &pdi[i]; } return NULL; } /** * sdw_cdns_config_stream: Configure a stream * * @cdns: Cadence instance * @port: Cadence data port * @ch: Channel count * @dir: Data direction * @pdi: PDI to be used */ void sdw_cdns_config_stream(struct sdw_cdns *cdns, struct sdw_cdns_port *port, 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 + port->num * CDNS_PORT_OFFSET; cdns_updatel(cdns, offset, CDNS_PORTCTRL_DIRN, val); val = port->num; 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); /** * cdns_get_num_pdi() - Get number of PDIs required * * @cdns: Cadence instance * @pdi: PDI to be used * @num: Number of PDIs * @ch_count: Channel count */ static int cdns_get_num_pdi(struct sdw_cdns *cdns, struct sdw_cdns_pdi *pdi, unsigned int num, u32 ch_count) { int i, pdis = 0; for (i = 0; i < num; i++) { if (pdi[i].assigned) continue; if (pdi[i].ch_count < ch_count) ch_count -= pdi[i].ch_count; else ch_count = 0; pdis++; if (!ch_count) break; } if (ch_count) return 0; return pdis; } /** * sdw_cdns_get_stream() - Get stream information * * @cdns: Cadence instance * @stream: Stream to be allocated * @ch: Channel count * @dir: Data direction */ int sdw_cdns_get_stream(struct sdw_cdns *cdns, struct sdw_cdns_streams *stream, u32 ch, u32 dir) { int pdis = 0; if (dir == SDW_DATA_DIR_RX) pdis = cdns_get_num_pdi(cdns, stream->in, stream->num_in, ch); else pdis = cdns_get_num_pdi(cdns, stream->out, stream->num_out, ch); /* check if we found PDI, else find in bi-directional */ if (!pdis) pdis = cdns_get_num_pdi(cdns, stream->bd, stream->num_bd, ch); return pdis; } EXPORT_SYMBOL(sdw_cdns_get_stream); /** * sdw_cdns_alloc_stream() - Allocate a stream * * @cdns: Cadence instance * @stream: Stream to be allocated * @port: Cadence data port * @ch: Channel count * @dir: Data direction */ int sdw_cdns_alloc_stream(struct sdw_cdns *cdns, struct sdw_cdns_streams *stream, struct sdw_cdns_port *port, u32 ch, u32 dir) { struct sdw_cdns_pdi *pdi = NULL; if (dir == SDW_DATA_DIR_RX) pdi = cdns_find_pdi(cdns, stream->num_in, stream->in); else pdi = cdns_find_pdi(cdns, stream->num_out, stream->out); /* check if we found a PDI, else find in bi-directional */ if (!pdi) pdi = cdns_find_pdi(cdns, stream->num_bd, stream->bd); if (!pdi) return -EIO; port->pdi = pdi; pdi->l_ch_num = 0; pdi->h_ch_num = ch - 1; pdi->dir = dir; pdi->ch_count = ch; return 0; } EXPORT_SYMBOL(sdw_cdns_alloc_stream); MODULE_LICENSE("Dual BSD/GPL"); MODULE_DESCRIPTION("Cadence Soundwire Library");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1