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e0767e3910
The existing 'struct sdw_cdns_dma_data' has really nothing to do with DMAs. The information is stored in the dai->dma_data, but this is really private data that should be stored in a different context. Beyond the academic elegance discussion, using dma_data is a problem for new Intel hardware where the dma_data structure is already used for true DMA handling performed by other parts of the code. This patch prepares a transition away from the use of dma_data, for now with a rename-only change. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20221101023521.2384586-2-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2042 lines
52 KiB
C
2042 lines
52 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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* Soundwire Intel Master Driver
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*/
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#include <linux/acpi.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/auxiliary_bus.h>
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#include <sound/pcm_params.h>
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#include <linux/pm_runtime.h>
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#include <sound/soc.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 <linux/soundwire/sdw_intel.h>
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#include "cadence_master.h"
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#include "bus.h"
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#include "intel.h"
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/* IDA min selected to avoid conflicts with HDaudio/iDISP SDI values */
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#define INTEL_DEV_NUM_IDA_MIN 4
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#define INTEL_MASTER_SUSPEND_DELAY_MS 3000
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#define INTEL_MASTER_RESET_ITERATIONS 10
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/*
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* debug/config flags for the Intel SoundWire Master.
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*
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* Since we may have multiple masters active, we can have up to 8
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* flags reused in each byte, with master0 using the ls-byte, etc.
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*/
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#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME BIT(0)
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#define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP BIT(1)
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#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE BIT(2)
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#define SDW_INTEL_MASTER_DISABLE_MULTI_LINK BIT(3)
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static int md_flags;
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module_param_named(sdw_md_flags, md_flags, int, 0444);
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MODULE_PARM_DESC(sdw_md_flags, "SoundWire Intel Master device flags (0x0 all off)");
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enum intel_pdi_type {
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INTEL_PDI_IN = 0,
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INTEL_PDI_OUT = 1,
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INTEL_PDI_BD = 2,
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};
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#define cdns_to_intel(_cdns) container_of(_cdns, struct sdw_intel, cdns)
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/*
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* Read, write helpers for HW registers
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*/
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static inline int intel_readl(void __iomem *base, int offset)
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{
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return readl(base + offset);
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}
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static inline void intel_writel(void __iomem *base, int offset, int value)
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{
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writel(value, base + offset);
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}
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static inline u16 intel_readw(void __iomem *base, int offset)
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{
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return readw(base + offset);
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}
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static inline void intel_writew(void __iomem *base, int offset, u16 value)
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{
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writew(value, base + offset);
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}
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static int intel_wait_bit(void __iomem *base, int offset, u32 mask, u32 target)
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{
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int timeout = 10;
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u32 reg_read;
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do {
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reg_read = readl(base + offset);
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if ((reg_read & mask) == target)
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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 -EAGAIN;
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}
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static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
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{
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writel(value, base + offset);
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return intel_wait_bit(base, offset, mask, 0);
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}
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static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
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{
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writel(value, base + offset);
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return intel_wait_bit(base, offset, mask, mask);
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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 intel_sprintf(void __iomem *mem, bool l,
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char *buf, size_t pos, unsigned int reg)
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{
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int value;
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if (l)
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value = intel_readl(mem, reg);
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else
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value = intel_readw(mem, reg);
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return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value);
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}
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static int intel_reg_show(struct seq_file *s_file, void *data)
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{
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struct sdw_intel *sdw = s_file->private;
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void __iomem *s = sdw->link_res->shim;
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void __iomem *a = sdw->link_res->alh;
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char *buf;
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ssize_t ret;
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int i, j;
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unsigned int links, reg;
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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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links = intel_readl(s, SDW_SHIM_LCAP) & SDW_SHIM_LCAP_LCOUNT_MASK;
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ret = scnprintf(buf, RD_BUF, "Register Value\n");
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ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");
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for (i = 0; i < links; i++) {
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reg = SDW_SHIM_LCAP + i * 4;
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ret += intel_sprintf(s, true, buf, ret, reg);
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}
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for (i = 0; i < links; i++) {
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ret += scnprintf(buf + ret, RD_BUF - ret, "\nLink%d\n", i);
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLSCAP(i));
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS0CM(i));
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS1CM(i));
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS2CM(i));
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS3CM(i));
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PCMSCAP(i));
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ret += scnprintf(buf + ret, RD_BUF - ret, "\n PCMSyCH registers\n");
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/*
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* the value 10 is the number of PDIs. We will need a
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* cleanup to remove hard-coded Intel configurations
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* from cadence_master.c
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*/
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for (j = 0; j < 10; j++) {
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ret += intel_sprintf(s, false, buf, ret,
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SDW_SHIM_PCMSYCHM(i, j));
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ret += intel_sprintf(s, false, buf, ret,
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SDW_SHIM_PCMSYCHC(i, j));
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}
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ret += scnprintf(buf + ret, RD_BUF - ret, "\n IOCTL, CTMCTL\n");
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i));
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i));
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}
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ret += scnprintf(buf + ret, RD_BUF - ret, "\nWake registers\n");
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKEEN);
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ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKESTS);
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ret += scnprintf(buf + ret, RD_BUF - ret, "\nALH STRMzCFG\n");
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for (i = 0; i < SDW_ALH_NUM_STREAMS; i++)
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ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i));
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seq_printf(s_file, "%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(intel_reg);
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static int intel_set_m_datamode(void *data, u64 value)
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{
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struct sdw_intel *sdw = data;
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struct sdw_bus *bus = &sdw->cdns.bus;
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if (value > SDW_PORT_DATA_MODE_STATIC_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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bus->params.m_data_mode = value;
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(intel_set_m_datamode_fops, NULL,
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intel_set_m_datamode, "%llu\n");
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static int intel_set_s_datamode(void *data, u64 value)
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{
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struct sdw_intel *sdw = data;
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struct sdw_bus *bus = &sdw->cdns.bus;
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if (value > SDW_PORT_DATA_MODE_STATIC_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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bus->params.s_data_mode = value;
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(intel_set_s_datamode_fops, NULL,
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intel_set_s_datamode, "%llu\n");
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static void intel_debugfs_init(struct sdw_intel *sdw)
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{
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struct dentry *root = sdw->cdns.bus.debugfs;
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if (!root)
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return;
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sdw->debugfs = debugfs_create_dir("intel-sdw", root);
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debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw,
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&intel_reg_fops);
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debugfs_create_file("intel-m-datamode", 0200, sdw->debugfs, sdw,
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&intel_set_m_datamode_fops);
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debugfs_create_file("intel-s-datamode", 0200, sdw->debugfs, sdw,
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&intel_set_s_datamode_fops);
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sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs);
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}
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static void intel_debugfs_exit(struct sdw_intel *sdw)
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{
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debugfs_remove_recursive(sdw->debugfs);
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}
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#else
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static void intel_debugfs_init(struct sdw_intel *sdw) {}
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static void intel_debugfs_exit(struct sdw_intel *sdw) {}
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#endif /* CONFIG_DEBUG_FS */
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/*
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* shim ops
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*/
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/* this needs to be called with shim_lock */
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static void intel_shim_glue_to_master_ip(struct sdw_intel *sdw)
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{
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void __iomem *shim = sdw->link_res->shim;
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unsigned int link_id = sdw->instance;
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u16 ioctl;
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/* Switch to MIP from Glue logic */
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ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
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ioctl &= ~(SDW_SHIM_IOCTL_DOE);
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl &= ~(SDW_SHIM_IOCTL_DO);
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl |= (SDW_SHIM_IOCTL_MIF);
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl &= ~(SDW_SHIM_IOCTL_BKE);
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ioctl &= ~(SDW_SHIM_IOCTL_COE);
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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/* at this point Master IP has full control of the I/Os */
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}
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/* this needs to be called with shim_lock */
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static void intel_shim_master_ip_to_glue(struct sdw_intel *sdw)
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{
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unsigned int link_id = sdw->instance;
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void __iomem *shim = sdw->link_res->shim;
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u16 ioctl;
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/* Glue logic */
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ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
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ioctl |= SDW_SHIM_IOCTL_BKE;
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ioctl |= SDW_SHIM_IOCTL_COE;
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl &= ~(SDW_SHIM_IOCTL_MIF);
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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/* at this point Integration Glue has full control of the I/Os */
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}
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/* this needs to be called with shim_lock */
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static void intel_shim_init(struct sdw_intel *sdw)
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{
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void __iomem *shim = sdw->link_res->shim;
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unsigned int link_id = sdw->instance;
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u16 ioctl = 0, act = 0;
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/* Initialize Shim */
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ioctl |= SDW_SHIM_IOCTL_BKE;
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl |= SDW_SHIM_IOCTL_WPDD;
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl |= SDW_SHIM_IOCTL_DO;
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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ioctl |= SDW_SHIM_IOCTL_DOE;
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intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
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usleep_range(10, 15);
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intel_shim_glue_to_master_ip(sdw);
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u16p_replace_bits(&act, 0x1, SDW_SHIM_CTMCTL_DOAIS);
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act |= SDW_SHIM_CTMCTL_DACTQE;
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act |= SDW_SHIM_CTMCTL_DODS;
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intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
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usleep_range(10, 15);
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}
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static int intel_shim_check_wake(struct sdw_intel *sdw)
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{
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void __iomem *shim;
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u16 wake_sts;
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shim = sdw->link_res->shim;
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wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
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return wake_sts & BIT(sdw->instance);
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}
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static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
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{
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void __iomem *shim = sdw->link_res->shim;
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unsigned int link_id = sdw->instance;
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u16 wake_en, wake_sts;
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mutex_lock(sdw->link_res->shim_lock);
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wake_en = intel_readw(shim, SDW_SHIM_WAKEEN);
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if (wake_enable) {
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/* Enable the wakeup */
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wake_en |= (SDW_SHIM_WAKEEN_ENABLE << link_id);
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intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
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} else {
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/* Disable the wake up interrupt */
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wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id);
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intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
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/* Clear wake status */
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wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
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wake_sts |= (SDW_SHIM_WAKESTS_STATUS << link_id);
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intel_writew(shim, SDW_SHIM_WAKESTS, wake_sts);
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}
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mutex_unlock(sdw->link_res->shim_lock);
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}
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static int intel_link_power_up(struct sdw_intel *sdw)
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{
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unsigned int link_id = sdw->instance;
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void __iomem *shim = sdw->link_res->shim;
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u32 *shim_mask = sdw->link_res->shim_mask;
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struct sdw_bus *bus = &sdw->cdns.bus;
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struct sdw_master_prop *prop = &bus->prop;
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u32 spa_mask, cpa_mask;
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u32 link_control;
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int ret = 0;
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u32 syncprd;
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u32 sync_reg;
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mutex_lock(sdw->link_res->shim_lock);
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/*
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* The hardware relies on an internal counter, typically 4kHz,
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* to generate the SoundWire SSP - which defines a 'safe'
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* synchronization point between commands and audio transport
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* and allows for multi link synchronization. The SYNCPRD value
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* is only dependent on the oscillator clock provided to
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* the IP, so adjust based on _DSD properties reported in DSDT
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* tables. The values reported are based on either 24MHz
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* (CNL/CML) or 38.4 MHz (ICL/TGL+).
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*/
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if (prop->mclk_freq % 6000000)
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syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_38_4;
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else
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syncprd = SDW_SHIM_SYNC_SYNCPRD_VAL_24;
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if (!*shim_mask) {
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dev_dbg(sdw->cdns.dev, "powering up all links\n");
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/* we first need to program the SyncPRD/CPU registers */
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dev_dbg(sdw->cdns.dev,
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"first link up, programming SYNCPRD\n");
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/* set SyncPRD period */
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sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
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u32p_replace_bits(&sync_reg, syncprd, SDW_SHIM_SYNC_SYNCPRD);
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/* Set SyncCPU bit */
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sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
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intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
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/* Link power up sequence */
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link_control = intel_readl(shim, SDW_SHIM_LCTL);
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/* only power-up enabled links */
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spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, sdw->link_res->link_mask);
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cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
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link_control |= spa_mask;
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ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
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if (ret < 0) {
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dev_err(sdw->cdns.dev, "Failed to power up link: %d\n", ret);
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goto out;
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}
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/* SyncCPU will change once link is active */
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ret = intel_wait_bit(shim, SDW_SHIM_SYNC,
|
|
SDW_SHIM_SYNC_SYNCCPU, 0);
|
|
if (ret < 0) {
|
|
dev_err(sdw->cdns.dev,
|
|
"Failed to set SHIM_SYNC: %d\n", ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
*shim_mask |= BIT(link_id);
|
|
|
|
sdw->cdns.link_up = true;
|
|
|
|
intel_shim_init(sdw);
|
|
|
|
out:
|
|
mutex_unlock(sdw->link_res->shim_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int intel_link_power_down(struct sdw_intel *sdw)
|
|
{
|
|
u32 link_control, spa_mask, cpa_mask;
|
|
unsigned int link_id = sdw->instance;
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
u32 *shim_mask = sdw->link_res->shim_mask;
|
|
int ret = 0;
|
|
|
|
mutex_lock(sdw->link_res->shim_lock);
|
|
|
|
if (!(*shim_mask & BIT(link_id)))
|
|
dev_err(sdw->cdns.dev,
|
|
"%s: Unbalanced power-up/down calls\n", __func__);
|
|
|
|
sdw->cdns.link_up = false;
|
|
|
|
intel_shim_master_ip_to_glue(sdw);
|
|
|
|
*shim_mask &= ~BIT(link_id);
|
|
|
|
if (!*shim_mask) {
|
|
|
|
dev_dbg(sdw->cdns.dev, "powering down all links\n");
|
|
|
|
/* Link power down sequence */
|
|
link_control = intel_readl(shim, SDW_SHIM_LCTL);
|
|
|
|
/* only power-down enabled links */
|
|
spa_mask = FIELD_PREP(SDW_SHIM_LCTL_SPA_MASK, ~sdw->link_res->link_mask);
|
|
cpa_mask = FIELD_PREP(SDW_SHIM_LCTL_CPA_MASK, sdw->link_res->link_mask);
|
|
|
|
link_control &= spa_mask;
|
|
|
|
ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
|
|
if (ret < 0) {
|
|
dev_err(sdw->cdns.dev, "%s: could not power down link\n", __func__);
|
|
|
|
/*
|
|
* we leave the sdw->cdns.link_up flag as false since we've disabled
|
|
* the link at this point and cannot handle interrupts any longer.
|
|
*/
|
|
}
|
|
}
|
|
|
|
mutex_unlock(sdw->link_res->shim_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void intel_shim_sync_arm(struct sdw_intel *sdw)
|
|
{
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
u32 sync_reg;
|
|
|
|
mutex_lock(sdw->link_res->shim_lock);
|
|
|
|
/* update SYNC register */
|
|
sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
|
|
sync_reg |= (SDW_SHIM_SYNC_CMDSYNC << sdw->instance);
|
|
intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
|
|
|
|
mutex_unlock(sdw->link_res->shim_lock);
|
|
}
|
|
|
|
static int intel_shim_sync_go_unlocked(struct sdw_intel *sdw)
|
|
{
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
u32 sync_reg;
|
|
int ret;
|
|
|
|
/* Read SYNC register */
|
|
sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
|
|
|
|
/*
|
|
* Set SyncGO bit to synchronously trigger a bank switch for
|
|
* all the masters. A write to SYNCGO bit clears CMDSYNC bit for all
|
|
* the Masters.
|
|
*/
|
|
sync_reg |= SDW_SHIM_SYNC_SYNCGO;
|
|
|
|
ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg,
|
|
SDW_SHIM_SYNC_SYNCGO);
|
|
|
|
if (ret < 0)
|
|
dev_err(sdw->cdns.dev, "SyncGO clear failed: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int intel_shim_sync_go(struct sdw_intel *sdw)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(sdw->link_res->shim_lock);
|
|
|
|
ret = intel_shim_sync_go_unlocked(sdw);
|
|
|
|
mutex_unlock(sdw->link_res->shim_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* PDI routines
|
|
*/
|
|
static void intel_pdi_init(struct sdw_intel *sdw,
|
|
struct sdw_cdns_stream_config *config)
|
|
{
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
unsigned int link_id = sdw->instance;
|
|
int pcm_cap;
|
|
|
|
/* PCM Stream Capability */
|
|
pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
|
|
|
|
config->pcm_bd = FIELD_GET(SDW_SHIM_PCMSCAP_BSS, pcm_cap);
|
|
config->pcm_in = FIELD_GET(SDW_SHIM_PCMSCAP_ISS, pcm_cap);
|
|
config->pcm_out = FIELD_GET(SDW_SHIM_PCMSCAP_OSS, pcm_cap);
|
|
|
|
dev_dbg(sdw->cdns.dev, "PCM cap bd:%d in:%d out:%d\n",
|
|
config->pcm_bd, config->pcm_in, config->pcm_out);
|
|
}
|
|
|
|
static int
|
|
intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num)
|
|
{
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
unsigned int link_id = sdw->instance;
|
|
int count;
|
|
|
|
count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
|
|
|
|
/*
|
|
* WORKAROUND: on all existing Intel controllers, pdi
|
|
* number 2 reports channel count as 1 even though it
|
|
* supports 8 channels. Performing hardcoding for pdi
|
|
* number 2.
|
|
*/
|
|
if (pdi_num == 2)
|
|
count = 7;
|
|
|
|
/* zero based values for channel count in register */
|
|
count++;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
|
|
struct sdw_cdns_pdi *pdi,
|
|
unsigned int num_pdi,
|
|
unsigned int *num_ch)
|
|
{
|
|
int i, ch_count = 0;
|
|
|
|
for (i = 0; i < num_pdi; i++) {
|
|
pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num);
|
|
ch_count += pdi->ch_count;
|
|
pdi++;
|
|
}
|
|
|
|
*num_ch = ch_count;
|
|
return 0;
|
|
}
|
|
|
|
static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
|
|
struct sdw_cdns_streams *stream)
|
|
{
|
|
intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
|
|
&stream->num_ch_bd);
|
|
|
|
intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
|
|
&stream->num_ch_in);
|
|
|
|
intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
|
|
&stream->num_ch_out);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_pdi_ch_update(struct sdw_intel *sdw)
|
|
{
|
|
intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
|
|
{
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
unsigned int link_id = sdw->instance;
|
|
int pdi_conf = 0;
|
|
|
|
/* the Bulk and PCM streams are not contiguous */
|
|
pdi->intel_alh_id = (link_id * 16) + pdi->num + 3;
|
|
if (pdi->num >= 2)
|
|
pdi->intel_alh_id += 2;
|
|
|
|
/*
|
|
* Program stream parameters to stream SHIM register
|
|
* This is applicable for PCM stream only.
|
|
*/
|
|
if (pdi->type != SDW_STREAM_PCM)
|
|
return;
|
|
|
|
if (pdi->dir == SDW_DATA_DIR_RX)
|
|
pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
|
|
else
|
|
pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
|
|
|
|
u32p_replace_bits(&pdi_conf, pdi->intel_alh_id, SDW_SHIM_PCMSYCM_STREAM);
|
|
u32p_replace_bits(&pdi_conf, pdi->l_ch_num, SDW_SHIM_PCMSYCM_LCHN);
|
|
u32p_replace_bits(&pdi_conf, pdi->h_ch_num, SDW_SHIM_PCMSYCM_HCHN);
|
|
|
|
intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
|
|
}
|
|
|
|
static void
|
|
intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
|
|
{
|
|
void __iomem *alh = sdw->link_res->alh;
|
|
unsigned int link_id = sdw->instance;
|
|
unsigned int conf;
|
|
|
|
/* the Bulk and PCM streams are not contiguous */
|
|
pdi->intel_alh_id = (link_id * 16) + pdi->num + 3;
|
|
if (pdi->num >= 2)
|
|
pdi->intel_alh_id += 2;
|
|
|
|
/* Program Stream config ALH register */
|
|
conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
|
|
|
|
u32p_replace_bits(&conf, SDW_ALH_STRMZCFG_DMAT_VAL, SDW_ALH_STRMZCFG_DMAT);
|
|
u32p_replace_bits(&conf, pdi->ch_count - 1, SDW_ALH_STRMZCFG_CHN);
|
|
|
|
intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
|
|
}
|
|
|
|
static int intel_params_stream(struct sdw_intel *sdw,
|
|
int stream,
|
|
struct snd_soc_dai *dai,
|
|
struct snd_pcm_hw_params *hw_params,
|
|
int link_id, int alh_stream_id)
|
|
{
|
|
struct sdw_intel_link_res *res = sdw->link_res;
|
|
struct sdw_intel_stream_params_data params_data;
|
|
|
|
params_data.stream = stream; /* direction */
|
|
params_data.dai = dai;
|
|
params_data.hw_params = hw_params;
|
|
params_data.link_id = link_id;
|
|
params_data.alh_stream_id = alh_stream_id;
|
|
|
|
if (res->ops && res->ops->params_stream && res->dev)
|
|
return res->ops->params_stream(res->dev,
|
|
¶ms_data);
|
|
return -EIO;
|
|
}
|
|
|
|
static int intel_free_stream(struct sdw_intel *sdw,
|
|
int stream,
|
|
struct snd_soc_dai *dai,
|
|
int link_id)
|
|
{
|
|
struct sdw_intel_link_res *res = sdw->link_res;
|
|
struct sdw_intel_stream_free_data free_data;
|
|
|
|
free_data.stream = stream; /* direction */
|
|
free_data.dai = dai;
|
|
free_data.link_id = link_id;
|
|
|
|
if (res->ops && res->ops->free_stream && res->dev)
|
|
return res->ops->free_stream(res->dev,
|
|
&free_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* bank switch routines
|
|
*/
|
|
|
|
static int intel_pre_bank_switch(struct sdw_bus *bus)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
|
|
/* Write to register only for multi-link */
|
|
if (!bus->multi_link)
|
|
return 0;
|
|
|
|
intel_shim_sync_arm(sdw);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_post_bank_switch(struct sdw_bus *bus)
|
|
{
|
|
struct sdw_cdns *cdns = bus_to_cdns(bus);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
void __iomem *shim = sdw->link_res->shim;
|
|
int sync_reg, ret;
|
|
|
|
/* Write to register only for multi-link */
|
|
if (!bus->multi_link)
|
|
return 0;
|
|
|
|
mutex_lock(sdw->link_res->shim_lock);
|
|
|
|
/* Read SYNC register */
|
|
sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
|
|
|
|
/*
|
|
* post_bank_switch() ops is called from the bus in loop for
|
|
* all the Masters in the steam with the expectation that
|
|
* we trigger the bankswitch for the only first Master in the list
|
|
* and do nothing for the other Masters
|
|
*
|
|
* So, set the SYNCGO bit only if CMDSYNC bit is set for any Master.
|
|
*/
|
|
if (!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK)) {
|
|
ret = 0;
|
|
goto unlock;
|
|
}
|
|
|
|
ret = intel_shim_sync_go_unlocked(sdw);
|
|
unlock:
|
|
mutex_unlock(sdw->link_res->shim_lock);
|
|
|
|
if (ret < 0)
|
|
dev_err(sdw->cdns.dev, "Post bank switch failed: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* DAI routines
|
|
*/
|
|
|
|
static int intel_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
int ret;
|
|
|
|
ret = pm_runtime_resume_and_get(cdns->dev);
|
|
if (ret < 0 && ret != -EACCES) {
|
|
dev_err_ratelimited(cdns->dev,
|
|
"pm_runtime_resume_and_get failed in %s, ret %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int intel_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_cdns_dai_runtime *dai_runtime;
|
|
struct sdw_cdns_pdi *pdi;
|
|
struct sdw_stream_config sconfig;
|
|
struct sdw_port_config *pconfig;
|
|
int ch, dir;
|
|
int ret;
|
|
|
|
dai_runtime = snd_soc_dai_get_dma_data(dai, substream);
|
|
if (!dai_runtime)
|
|
return -EIO;
|
|
|
|
ch = params_channels(params);
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
dir = SDW_DATA_DIR_RX;
|
|
else
|
|
dir = SDW_DATA_DIR_TX;
|
|
|
|
pdi = sdw_cdns_alloc_pdi(cdns, &cdns->pcm, ch, dir, dai->id);
|
|
|
|
if (!pdi) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
/* do run-time configurations for SHIM, ALH and PDI/PORT */
|
|
intel_pdi_shim_configure(sdw, pdi);
|
|
intel_pdi_alh_configure(sdw, pdi);
|
|
sdw_cdns_config_stream(cdns, ch, dir, pdi);
|
|
|
|
/* store pdi and hw_params, may be needed in prepare step */
|
|
dai_runtime->paused = false;
|
|
dai_runtime->suspended = false;
|
|
dai_runtime->pdi = pdi;
|
|
dai_runtime->hw_params = params;
|
|
|
|
/* Inform DSP about PDI stream number */
|
|
ret = intel_params_stream(sdw, substream->stream, dai, params,
|
|
sdw->instance,
|
|
pdi->intel_alh_id);
|
|
if (ret)
|
|
goto error;
|
|
|
|
sconfig.direction = dir;
|
|
sconfig.ch_count = ch;
|
|
sconfig.frame_rate = params_rate(params);
|
|
sconfig.type = dai_runtime->stream_type;
|
|
|
|
sconfig.bps = snd_pcm_format_width(params_format(params));
|
|
|
|
/* Port configuration */
|
|
pconfig = kzalloc(sizeof(*pconfig), GFP_KERNEL);
|
|
if (!pconfig) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
pconfig->num = pdi->num;
|
|
pconfig->ch_mask = (1 << ch) - 1;
|
|
|
|
ret = sdw_stream_add_master(&cdns->bus, &sconfig,
|
|
pconfig, 1, dai_runtime->stream);
|
|
if (ret)
|
|
dev_err(cdns->dev, "add master to stream failed:%d\n", ret);
|
|
|
|
kfree(pconfig);
|
|
error:
|
|
return ret;
|
|
}
|
|
|
|
static int intel_prepare(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_cdns_dai_runtime *dai_runtime;
|
|
int ch, dir;
|
|
int ret = 0;
|
|
|
|
dai_runtime = snd_soc_dai_get_dma_data(dai, substream);
|
|
if (!dai_runtime) {
|
|
dev_err(dai->dev, "failed to get dai runtime in %s\n",
|
|
__func__);
|
|
return -EIO;
|
|
}
|
|
|
|
if (dai_runtime->suspended) {
|
|
dai_runtime->suspended = false;
|
|
|
|
/*
|
|
* .prepare() is called after system resume, where we
|
|
* need to reinitialize the SHIM/ALH/Cadence IP.
|
|
* .prepare() is also called to deal with underflows,
|
|
* but in those cases we cannot touch ALH/SHIM
|
|
* registers
|
|
*/
|
|
|
|
/* configure stream */
|
|
ch = params_channels(dai_runtime->hw_params);
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
dir = SDW_DATA_DIR_RX;
|
|
else
|
|
dir = SDW_DATA_DIR_TX;
|
|
|
|
intel_pdi_shim_configure(sdw, dai_runtime->pdi);
|
|
intel_pdi_alh_configure(sdw, dai_runtime->pdi);
|
|
sdw_cdns_config_stream(cdns, ch, dir, dai_runtime->pdi);
|
|
|
|
/* Inform DSP about PDI stream number */
|
|
ret = intel_params_stream(sdw, substream->stream, dai,
|
|
dai_runtime->hw_params,
|
|
sdw->instance,
|
|
dai_runtime->pdi->intel_alh_id);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_cdns_dai_runtime *dai_runtime;
|
|
int ret;
|
|
|
|
dai_runtime = snd_soc_dai_get_dma_data(dai, substream);
|
|
if (!dai_runtime)
|
|
return -EIO;
|
|
|
|
/*
|
|
* The sdw stream state will transition to RELEASED when stream->
|
|
* master_list is empty. So the stream state will transition to
|
|
* DEPREPARED for the first cpu-dai and to RELEASED for the last
|
|
* cpu-dai.
|
|
*/
|
|
ret = sdw_stream_remove_master(&cdns->bus, dai_runtime->stream);
|
|
if (ret < 0) {
|
|
dev_err(dai->dev, "remove master from stream %s failed: %d\n",
|
|
dai_runtime->stream->name, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = intel_free_stream(sdw, substream->stream, dai, sdw->instance);
|
|
if (ret < 0) {
|
|
dev_err(dai->dev, "intel_free_stream: failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
dai_runtime->hw_params = NULL;
|
|
dai_runtime->pdi = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void intel_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
|
|
pm_runtime_mark_last_busy(cdns->dev);
|
|
pm_runtime_put_autosuspend(cdns->dev);
|
|
}
|
|
|
|
static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
|
|
void *stream, int direction)
|
|
{
|
|
return cdns_set_sdw_stream(dai, stream, direction);
|
|
}
|
|
|
|
static void *intel_get_sdw_stream(struct snd_soc_dai *dai,
|
|
int direction)
|
|
{
|
|
struct sdw_cdns_dai_runtime *dai_runtime;
|
|
|
|
if (direction == SNDRV_PCM_STREAM_PLAYBACK)
|
|
dai_runtime = dai->playback_dma_data;
|
|
else
|
|
dai_runtime = dai->capture_dma_data;
|
|
|
|
if (!dai_runtime)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
return dai_runtime->stream;
|
|
}
|
|
|
|
static int intel_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
|
|
{
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_intel_link_res *res = sdw->link_res;
|
|
struct sdw_cdns_dai_runtime *dai_runtime;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* The .trigger callback is used to send required IPC to audio
|
|
* firmware. The .free_stream callback will still be called
|
|
* by intel_free_stream() in the TRIGGER_SUSPEND case.
|
|
*/
|
|
if (res->ops && res->ops->trigger)
|
|
res->ops->trigger(dai, cmd, substream->stream);
|
|
|
|
dai_runtime = snd_soc_dai_get_dma_data(dai, substream);
|
|
if (!dai_runtime) {
|
|
dev_err(dai->dev, "failed to get dai runtime in %s\n",
|
|
__func__);
|
|
return -EIO;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
|
|
/*
|
|
* The .prepare callback is used to deal with xruns and resume operations.
|
|
* In the case of xruns, the DMAs and SHIM registers cannot be touched,
|
|
* but for resume operations the DMAs and SHIM registers need to be initialized.
|
|
* the .trigger callback is used to track the suspend case only.
|
|
*/
|
|
|
|
dai_runtime->suspended = true;
|
|
|
|
ret = intel_free_stream(sdw, substream->stream, dai, sdw->instance);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
dai_runtime->paused = true;
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
dai_runtime->paused = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int intel_component_probe(struct snd_soc_component *component)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* make sure the device is pm_runtime_active before initiating
|
|
* bus transactions during the card registration.
|
|
* We use pm_runtime_resume() here, without taking a reference
|
|
* and releasing it immediately.
|
|
*/
|
|
ret = pm_runtime_resume(component->dev);
|
|
if (ret < 0 && ret != -EACCES)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_component_dais_suspend(struct snd_soc_component *component)
|
|
{
|
|
struct snd_soc_dai *dai;
|
|
|
|
/*
|
|
* In the corner case where a SUSPEND happens during a PAUSE, the ALSA core
|
|
* does not throw the TRIGGER_SUSPEND. This leaves the DAIs in an unbalanced state.
|
|
* Since the component suspend is called last, we can trap this corner case
|
|
* and force the DAIs to release their resources.
|
|
*/
|
|
for_each_component_dais(component, dai) {
|
|
struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_cdns_dai_runtime *dai_runtime;
|
|
int stream;
|
|
int ret;
|
|
|
|
dai_runtime = dai->playback_dma_data;
|
|
stream = SNDRV_PCM_STREAM_PLAYBACK;
|
|
if (!dai_runtime) {
|
|
dai_runtime = dai->capture_dma_data;
|
|
stream = SNDRV_PCM_STREAM_CAPTURE;
|
|
}
|
|
|
|
if (!dai_runtime)
|
|
continue;
|
|
|
|
if (dai_runtime->suspended)
|
|
continue;
|
|
|
|
if (dai_runtime->paused) {
|
|
dai_runtime->suspended = true;
|
|
|
|
ret = intel_free_stream(sdw, stream, dai, sdw->instance);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
|
|
.startup = intel_startup,
|
|
.hw_params = intel_hw_params,
|
|
.prepare = intel_prepare,
|
|
.hw_free = intel_hw_free,
|
|
.trigger = intel_trigger,
|
|
.shutdown = intel_shutdown,
|
|
.set_stream = intel_pcm_set_sdw_stream,
|
|
.get_stream = intel_get_sdw_stream,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver dai_component = {
|
|
.name = "soundwire",
|
|
.probe = intel_component_probe,
|
|
.suspend = intel_component_dais_suspend,
|
|
.legacy_dai_naming = 1,
|
|
};
|
|
|
|
static int intel_create_dai(struct sdw_cdns *cdns,
|
|
struct snd_soc_dai_driver *dais,
|
|
enum intel_pdi_type type,
|
|
u32 num, u32 off, u32 max_ch)
|
|
{
|
|
int i;
|
|
|
|
if (num == 0)
|
|
return 0;
|
|
|
|
/* TODO: Read supported rates/formats from hardware */
|
|
for (i = off; i < (off + num); i++) {
|
|
dais[i].name = devm_kasprintf(cdns->dev, GFP_KERNEL,
|
|
"SDW%d Pin%d",
|
|
cdns->instance, i);
|
|
if (!dais[i].name)
|
|
return -ENOMEM;
|
|
|
|
if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
|
|
dais[i].playback.channels_min = 1;
|
|
dais[i].playback.channels_max = max_ch;
|
|
dais[i].playback.rates = SNDRV_PCM_RATE_48000;
|
|
dais[i].playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
|
|
}
|
|
|
|
if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
|
|
dais[i].capture.channels_min = 1;
|
|
dais[i].capture.channels_max = max_ch;
|
|
dais[i].capture.rates = SNDRV_PCM_RATE_48000;
|
|
dais[i].capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
|
|
}
|
|
|
|
dais[i].ops = &intel_pcm_dai_ops;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_register_dai(struct sdw_intel *sdw)
|
|
{
|
|
struct sdw_cdns_stream_config config;
|
|
struct sdw_cdns *cdns = &sdw->cdns;
|
|
struct sdw_cdns_streams *stream;
|
|
struct snd_soc_dai_driver *dais;
|
|
int num_dai, ret, off = 0;
|
|
|
|
/* Read the PDI config and initialize cadence PDI */
|
|
intel_pdi_init(sdw, &config);
|
|
ret = sdw_cdns_pdi_init(cdns, config);
|
|
if (ret)
|
|
return ret;
|
|
|
|
intel_pdi_ch_update(sdw);
|
|
|
|
/* DAIs are created based on total number of PDIs supported */
|
|
num_dai = cdns->pcm.num_pdi;
|
|
|
|
dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
|
|
if (!dais)
|
|
return -ENOMEM;
|
|
|
|
/* Create PCM DAIs */
|
|
stream = &cdns->pcm;
|
|
|
|
ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, cdns->pcm.num_in,
|
|
off, stream->num_ch_in);
|
|
if (ret)
|
|
return ret;
|
|
|
|
off += cdns->pcm.num_in;
|
|
ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pcm.num_out,
|
|
off, stream->num_ch_out);
|
|
if (ret)
|
|
return ret;
|
|
|
|
off += cdns->pcm.num_out;
|
|
ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pcm.num_bd,
|
|
off, stream->num_ch_bd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return devm_snd_soc_register_component(cdns->dev, &dai_component,
|
|
dais, num_dai);
|
|
}
|
|
|
|
static int intel_start_bus(struct sdw_intel *sdw)
|
|
{
|
|
struct device *dev = sdw->cdns.dev;
|
|
struct sdw_cdns *cdns = &sdw->cdns;
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
int ret;
|
|
|
|
ret = sdw_cdns_enable_interrupt(cdns, true);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* follow recommended programming flows to avoid timeouts when
|
|
* gsync is enabled
|
|
*/
|
|
if (bus->multi_link)
|
|
intel_shim_sync_arm(sdw);
|
|
|
|
ret = sdw_cdns_init(cdns);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: unable to initialize Cadence IP: %d\n", __func__, ret);
|
|
goto err_interrupt;
|
|
}
|
|
|
|
ret = sdw_cdns_exit_reset(cdns);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret);
|
|
goto err_interrupt;
|
|
}
|
|
|
|
if (bus->multi_link) {
|
|
ret = intel_shim_sync_go(sdw);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: sync go failed: %d\n", __func__, ret);
|
|
goto err_interrupt;
|
|
}
|
|
}
|
|
sdw_cdns_check_self_clearing_bits(cdns, __func__,
|
|
true, INTEL_MASTER_RESET_ITERATIONS);
|
|
|
|
return 0;
|
|
|
|
err_interrupt:
|
|
sdw_cdns_enable_interrupt(cdns, false);
|
|
return ret;
|
|
}
|
|
|
|
static int intel_start_bus_after_reset(struct sdw_intel *sdw)
|
|
{
|
|
struct device *dev = sdw->cdns.dev;
|
|
struct sdw_cdns *cdns = &sdw->cdns;
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
bool clock_stop0;
|
|
int status;
|
|
int ret;
|
|
|
|
/*
|
|
* An exception condition occurs for the CLK_STOP_BUS_RESET
|
|
* case if one or more masters remain active. In this condition,
|
|
* all the masters are powered on for they are in the same power
|
|
* domain. Master can preserve its context for clock stop0, so
|
|
* there is no need to clear slave status and reset bus.
|
|
*/
|
|
clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
|
|
|
|
if (!clock_stop0) {
|
|
|
|
/*
|
|
* make sure all Slaves are tagged as UNATTACHED and
|
|
* provide reason for reinitialization
|
|
*/
|
|
|
|
status = SDW_UNATTACH_REQUEST_MASTER_RESET;
|
|
sdw_clear_slave_status(bus, status);
|
|
|
|
ret = sdw_cdns_enable_interrupt(cdns, true);
|
|
if (ret < 0) {
|
|
dev_err(dev, "cannot enable interrupts during resume\n");
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* follow recommended programming flows to avoid
|
|
* timeouts when gsync is enabled
|
|
*/
|
|
if (bus->multi_link)
|
|
intel_shim_sync_arm(sdw);
|
|
|
|
/*
|
|
* Re-initialize the IP since it was powered-off
|
|
*/
|
|
sdw_cdns_init(&sdw->cdns);
|
|
|
|
} else {
|
|
ret = sdw_cdns_enable_interrupt(cdns, true);
|
|
if (ret < 0) {
|
|
dev_err(dev, "cannot enable interrupts during resume\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = sdw_cdns_clock_restart(cdns, !clock_stop0);
|
|
if (ret < 0) {
|
|
dev_err(dev, "unable to restart clock during resume\n");
|
|
goto err_interrupt;
|
|
}
|
|
|
|
if (!clock_stop0) {
|
|
ret = sdw_cdns_exit_reset(cdns);
|
|
if (ret < 0) {
|
|
dev_err(dev, "unable to exit bus reset sequence during resume\n");
|
|
goto err_interrupt;
|
|
}
|
|
|
|
if (bus->multi_link) {
|
|
ret = intel_shim_sync_go(sdw);
|
|
if (ret < 0) {
|
|
dev_err(sdw->cdns.dev, "sync go failed during resume\n");
|
|
goto err_interrupt;
|
|
}
|
|
}
|
|
}
|
|
sdw_cdns_check_self_clearing_bits(cdns, __func__, true, INTEL_MASTER_RESET_ITERATIONS);
|
|
|
|
return 0;
|
|
|
|
err_interrupt:
|
|
sdw_cdns_enable_interrupt(cdns, false);
|
|
return ret;
|
|
}
|
|
|
|
static void intel_check_clock_stop(struct sdw_intel *sdw)
|
|
{
|
|
struct device *dev = sdw->cdns.dev;
|
|
bool clock_stop0;
|
|
|
|
clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);
|
|
if (!clock_stop0)
|
|
dev_err(dev, "%s: invalid configuration, clock was not stopped\n", __func__);
|
|
}
|
|
|
|
static int intel_start_bus_after_clock_stop(struct sdw_intel *sdw)
|
|
{
|
|
struct device *dev = sdw->cdns.dev;
|
|
struct sdw_cdns *cdns = &sdw->cdns;
|
|
int ret;
|
|
|
|
ret = sdw_cdns_enable_interrupt(cdns, true);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot enable interrupts: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = sdw_cdns_clock_restart(cdns, false);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: unable to restart clock: %d\n", __func__, ret);
|
|
sdw_cdns_enable_interrupt(cdns, false);
|
|
return ret;
|
|
}
|
|
|
|
sdw_cdns_check_self_clearing_bits(cdns, "intel_resume_runtime no_quirks",
|
|
true, INTEL_MASTER_RESET_ITERATIONS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop)
|
|
{
|
|
struct device *dev = sdw->cdns.dev;
|
|
struct sdw_cdns *cdns = &sdw->cdns;
|
|
bool wake_enable = false;
|
|
int ret;
|
|
|
|
if (clock_stop) {
|
|
ret = sdw_cdns_clock_stop(cdns, true);
|
|
if (ret < 0)
|
|
dev_err(dev, "%s: cannot stop clock: %d\n", __func__, ret);
|
|
else
|
|
wake_enable = true;
|
|
}
|
|
|
|
ret = sdw_cdns_enable_interrupt(cdns, false);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot disable interrupts: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = intel_link_power_down(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "%s: Link power down failed: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
intel_shim_wake(sdw, wake_enable);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sdw_master_read_intel_prop(struct sdw_bus *bus)
|
|
{
|
|
struct sdw_master_prop *prop = &bus->prop;
|
|
struct fwnode_handle *link;
|
|
char name[32];
|
|
u32 quirk_mask;
|
|
|
|
/* Find master handle */
|
|
snprintf(name, sizeof(name),
|
|
"mipi-sdw-link-%d-subproperties", bus->link_id);
|
|
|
|
link = device_get_named_child_node(bus->dev, name);
|
|
if (!link) {
|
|
dev_err(bus->dev, "Master node %s not found\n", name);
|
|
return -EIO;
|
|
}
|
|
|
|
fwnode_property_read_u32(link,
|
|
"intel-sdw-ip-clock",
|
|
&prop->mclk_freq);
|
|
|
|
/* the values reported by BIOS are the 2x clock, not the bus clock */
|
|
prop->mclk_freq /= 2;
|
|
|
|
fwnode_property_read_u32(link,
|
|
"intel-quirk-mask",
|
|
&quirk_mask);
|
|
|
|
if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE)
|
|
prop->hw_disabled = true;
|
|
|
|
prop->quirks = SDW_MASTER_QUIRKS_CLEAR_INITIAL_CLASH |
|
|
SDW_MASTER_QUIRKS_CLEAR_INITIAL_PARITY;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int intel_prop_read(struct sdw_bus *bus)
|
|
{
|
|
/* Initialize with default handler to read all DisCo properties */
|
|
sdw_master_read_prop(bus);
|
|
|
|
/* read Intel-specific properties */
|
|
sdw_master_read_intel_prop(bus);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sdw_master_ops sdw_intel_ops = {
|
|
.read_prop = intel_prop_read,
|
|
.override_adr = sdw_dmi_override_adr,
|
|
.xfer_msg = cdns_xfer_msg,
|
|
.xfer_msg_defer = cdns_xfer_msg_defer,
|
|
.reset_page_addr = cdns_reset_page_addr,
|
|
.set_bus_conf = cdns_bus_conf,
|
|
.pre_bank_switch = intel_pre_bank_switch,
|
|
.post_bank_switch = intel_post_bank_switch,
|
|
.read_ping_status = cdns_read_ping_status,
|
|
};
|
|
|
|
/*
|
|
* probe and init (aux_dev_id argument is required by function prototype but not used)
|
|
*/
|
|
static int intel_link_probe(struct auxiliary_device *auxdev,
|
|
const struct auxiliary_device_id *aux_dev_id)
|
|
|
|
{
|
|
struct device *dev = &auxdev->dev;
|
|
struct sdw_intel_link_dev *ldev = auxiliary_dev_to_sdw_intel_link_dev(auxdev);
|
|
struct sdw_intel *sdw;
|
|
struct sdw_cdns *cdns;
|
|
struct sdw_bus *bus;
|
|
int ret;
|
|
|
|
sdw = devm_kzalloc(dev, sizeof(*sdw), GFP_KERNEL);
|
|
if (!sdw)
|
|
return -ENOMEM;
|
|
|
|
cdns = &sdw->cdns;
|
|
bus = &cdns->bus;
|
|
|
|
sdw->instance = auxdev->id;
|
|
sdw->link_res = &ldev->link_res;
|
|
cdns->dev = dev;
|
|
cdns->registers = sdw->link_res->registers;
|
|
cdns->instance = sdw->instance;
|
|
cdns->msg_count = 0;
|
|
|
|
bus->link_id = auxdev->id;
|
|
bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN;
|
|
|
|
sdw_cdns_probe(cdns);
|
|
|
|
/* Set ops */
|
|
bus->ops = &sdw_intel_ops;
|
|
|
|
/* set driver data, accessed by snd_soc_dai_get_drvdata() */
|
|
auxiliary_set_drvdata(auxdev, cdns);
|
|
|
|
/* use generic bandwidth allocation algorithm */
|
|
sdw->cdns.bus.compute_params = sdw_compute_params;
|
|
|
|
/* avoid resuming from pm_runtime suspend if it's not required */
|
|
dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND);
|
|
|
|
ret = sdw_bus_master_add(bus, dev, dev->fwnode);
|
|
if (ret) {
|
|
dev_err(dev, "sdw_bus_master_add fail: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (bus->prop.hw_disabled)
|
|
dev_info(dev,
|
|
"SoundWire master %d is disabled, will be ignored\n",
|
|
bus->link_id);
|
|
/*
|
|
* Ignore BIOS err_threshold, it's a really bad idea when dealing
|
|
* with multiple hardware synchronized links
|
|
*/
|
|
bus->prop.err_threshold = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int intel_link_startup(struct auxiliary_device *auxdev)
|
|
{
|
|
struct device *dev = &auxdev->dev;
|
|
struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
int link_flags;
|
|
bool multi_link;
|
|
u32 clock_stop_quirks;
|
|
int ret;
|
|
|
|
if (bus->prop.hw_disabled) {
|
|
dev_info(dev,
|
|
"SoundWire master %d is disabled, ignoring\n",
|
|
sdw->instance);
|
|
return 0;
|
|
}
|
|
|
|
link_flags = md_flags >> (bus->link_id * 8);
|
|
multi_link = !(link_flags & SDW_INTEL_MASTER_DISABLE_MULTI_LINK);
|
|
if (!multi_link) {
|
|
dev_dbg(dev, "Multi-link is disabled\n");
|
|
} else {
|
|
/*
|
|
* hardware-based synchronization is required regardless
|
|
* of the number of segments used by a stream: SSP-based
|
|
* synchronization is gated by gsync when the multi-master
|
|
* mode is set.
|
|
*/
|
|
bus->hw_sync_min_links = 1;
|
|
}
|
|
bus->multi_link = multi_link;
|
|
|
|
/* Initialize shim, controller */
|
|
ret = intel_link_power_up(sdw);
|
|
if (ret)
|
|
goto err_init;
|
|
|
|
/* Register DAIs */
|
|
ret = intel_register_dai(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "DAI registration failed: %d\n", ret);
|
|
goto err_power_up;
|
|
}
|
|
|
|
intel_debugfs_init(sdw);
|
|
|
|
/* start bus */
|
|
ret = intel_start_bus(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "bus start failed: %d\n", ret);
|
|
goto err_power_up;
|
|
}
|
|
|
|
/* Enable runtime PM */
|
|
if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) {
|
|
pm_runtime_set_autosuspend_delay(dev,
|
|
INTEL_MASTER_SUSPEND_DELAY_MS);
|
|
pm_runtime_use_autosuspend(dev);
|
|
pm_runtime_mark_last_busy(dev);
|
|
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
}
|
|
|
|
clock_stop_quirks = sdw->link_res->clock_stop_quirks;
|
|
if (clock_stop_quirks & SDW_INTEL_CLK_STOP_NOT_ALLOWED) {
|
|
/*
|
|
* To keep the clock running we need to prevent
|
|
* pm_runtime suspend from happening by increasing the
|
|
* reference count.
|
|
* This quirk is specified by the parent PCI device in
|
|
* case of specific latency requirements. It will have
|
|
* no effect if pm_runtime is disabled by the user via
|
|
* a module parameter for testing purposes.
|
|
*/
|
|
pm_runtime_get_noresume(dev);
|
|
}
|
|
|
|
/*
|
|
* The runtime PM status of Slave devices is "Unsupported"
|
|
* until they report as ATTACHED. If they don't, e.g. because
|
|
* there are no Slave devices populated or if the power-on is
|
|
* delayed or dependent on a power switch, the Master will
|
|
* remain active and prevent its parent from suspending.
|
|
*
|
|
* Conditionally force the pm_runtime core to re-evaluate the
|
|
* Master status in the absence of any Slave activity. A quirk
|
|
* is provided to e.g. deal with Slaves that may be powered on
|
|
* with a delay. A more complete solution would require the
|
|
* definition of Master properties.
|
|
*/
|
|
if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE))
|
|
pm_runtime_idle(dev);
|
|
|
|
sdw->startup_done = true;
|
|
return 0;
|
|
|
|
err_power_up:
|
|
intel_link_power_down(sdw);
|
|
err_init:
|
|
return ret;
|
|
}
|
|
|
|
static void intel_link_remove(struct auxiliary_device *auxdev)
|
|
{
|
|
struct sdw_cdns *cdns = auxiliary_get_drvdata(auxdev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
|
|
/*
|
|
* Since pm_runtime is already disabled, we don't decrease
|
|
* the refcount when the clock_stop_quirk is
|
|
* SDW_INTEL_CLK_STOP_NOT_ALLOWED
|
|
*/
|
|
if (!bus->prop.hw_disabled) {
|
|
intel_debugfs_exit(sdw);
|
|
sdw_cdns_enable_interrupt(cdns, false);
|
|
}
|
|
sdw_bus_master_delete(bus);
|
|
}
|
|
|
|
int intel_link_process_wakeen_event(struct auxiliary_device *auxdev)
|
|
{
|
|
struct device *dev = &auxdev->dev;
|
|
struct sdw_intel *sdw;
|
|
struct sdw_bus *bus;
|
|
|
|
sdw = auxiliary_get_drvdata(auxdev);
|
|
bus = &sdw->cdns.bus;
|
|
|
|
if (bus->prop.hw_disabled || !sdw->startup_done) {
|
|
dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
|
|
bus->link_id);
|
|
return 0;
|
|
}
|
|
|
|
if (!intel_shim_check_wake(sdw))
|
|
return 0;
|
|
|
|
/* disable WAKEEN interrupt ASAP to prevent interrupt flood */
|
|
intel_shim_wake(sdw, false);
|
|
|
|
/*
|
|
* resume the Master, which will generate a bus reset and result in
|
|
* Slaves re-attaching and be re-enumerated. The SoundWire physical
|
|
* device which generated the wake will trigger an interrupt, which
|
|
* will in turn cause the corresponding Linux Slave device to be
|
|
* resumed and the Slave codec driver to check the status.
|
|
*/
|
|
pm_request_resume(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* PM calls
|
|
*/
|
|
|
|
static int intel_resume_child_device(struct device *dev, void *data)
|
|
{
|
|
int ret;
|
|
struct sdw_slave *slave = dev_to_sdw_dev(dev);
|
|
|
|
if (!slave->probed) {
|
|
dev_dbg(dev, "skipping device, no probed driver\n");
|
|
return 0;
|
|
}
|
|
if (!slave->dev_num_sticky) {
|
|
dev_dbg(dev, "skipping device, never detected on bus\n");
|
|
return 0;
|
|
}
|
|
|
|
ret = pm_request_resume(dev);
|
|
if (ret < 0)
|
|
dev_err(dev, "%s: pm_request_resume failed: %d\n", __func__, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused intel_pm_prepare(struct device *dev)
|
|
{
|
|
struct sdw_cdns *cdns = dev_get_drvdata(dev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
u32 clock_stop_quirks;
|
|
int ret;
|
|
|
|
if (bus->prop.hw_disabled || !sdw->startup_done) {
|
|
dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
|
|
bus->link_id);
|
|
return 0;
|
|
}
|
|
|
|
clock_stop_quirks = sdw->link_res->clock_stop_quirks;
|
|
|
|
if (pm_runtime_suspended(dev) &&
|
|
pm_runtime_suspended(dev->parent) &&
|
|
((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
|
|
!clock_stop_quirks)) {
|
|
/*
|
|
* if we've enabled clock stop, and the parent is suspended, the SHIM registers
|
|
* are not accessible and the shim wake cannot be disabled.
|
|
* The only solution is to resume the entire bus to full power
|
|
*/
|
|
|
|
/*
|
|
* If any operation in this block fails, we keep going since we don't want
|
|
* to prevent system suspend from happening and errors should be recoverable
|
|
* on resume.
|
|
*/
|
|
|
|
/*
|
|
* first resume the device for this link. This will also by construction
|
|
* resume the PCI parent device.
|
|
*/
|
|
ret = pm_request_resume(dev);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: pm_request_resume failed: %d\n", __func__, ret);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Continue resuming the entire bus (parent + child devices) to exit
|
|
* the clock stop mode. If there are no devices connected on this link
|
|
* this is a no-op.
|
|
* The resume to full power could have been implemented with a .prepare
|
|
* step in SoundWire codec drivers. This would however require a lot
|
|
* of code to handle an Intel-specific corner case. It is simpler in
|
|
* practice to add a loop at the link level.
|
|
*/
|
|
ret = device_for_each_child(bus->dev, NULL, intel_resume_child_device);
|
|
|
|
if (ret < 0)
|
|
dev_err(dev, "%s: intel_resume_child_device failed: %d\n", __func__, ret);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused intel_suspend(struct device *dev)
|
|
{
|
|
struct sdw_cdns *cdns = dev_get_drvdata(dev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
u32 clock_stop_quirks;
|
|
int ret;
|
|
|
|
if (bus->prop.hw_disabled || !sdw->startup_done) {
|
|
dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
|
|
bus->link_id);
|
|
return 0;
|
|
}
|
|
|
|
if (pm_runtime_suspended(dev)) {
|
|
dev_dbg(dev, "pm_runtime status: suspended\n");
|
|
|
|
clock_stop_quirks = sdw->link_res->clock_stop_quirks;
|
|
|
|
if ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
|
|
!clock_stop_quirks) {
|
|
|
|
if (pm_runtime_suspended(dev->parent)) {
|
|
/*
|
|
* paranoia check: this should not happen with the .prepare
|
|
* resume to full power
|
|
*/
|
|
dev_err(dev, "%s: invalid config: parent is suspended\n", __func__);
|
|
} else {
|
|
intel_shim_wake(sdw, false);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ret = intel_stop_bus(sdw, false);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot stop bus: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused intel_suspend_runtime(struct device *dev)
|
|
{
|
|
struct sdw_cdns *cdns = dev_get_drvdata(dev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
u32 clock_stop_quirks;
|
|
int ret;
|
|
|
|
if (bus->prop.hw_disabled || !sdw->startup_done) {
|
|
dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
|
|
bus->link_id);
|
|
return 0;
|
|
}
|
|
|
|
clock_stop_quirks = sdw->link_res->clock_stop_quirks;
|
|
|
|
if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
|
|
ret = intel_stop_bus(sdw, false);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot stop bus during teardown: %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET || !clock_stop_quirks) {
|
|
ret = intel_stop_bus(sdw, true);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot stop bus during clock_stop: %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
} else {
|
|
dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
|
|
__func__, clock_stop_quirks);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused intel_resume(struct device *dev)
|
|
{
|
|
struct sdw_cdns *cdns = dev_get_drvdata(dev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
int link_flags;
|
|
int ret;
|
|
|
|
if (bus->prop.hw_disabled || !sdw->startup_done) {
|
|
dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
|
|
bus->link_id);
|
|
return 0;
|
|
}
|
|
|
|
link_flags = md_flags >> (bus->link_id * 8);
|
|
|
|
if (pm_runtime_suspended(dev)) {
|
|
dev_dbg(dev, "pm_runtime status was suspended, forcing active\n");
|
|
|
|
/* follow required sequence from runtime_pm.rst */
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_enable(dev);
|
|
|
|
link_flags = md_flags >> (bus->link_id * 8);
|
|
|
|
if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE))
|
|
pm_runtime_idle(dev);
|
|
}
|
|
|
|
ret = intel_link_power_up(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "%s failed: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* make sure all Slaves are tagged as UNATTACHED and provide
|
|
* reason for reinitialization
|
|
*/
|
|
sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
|
|
|
|
ret = intel_start_bus(sdw);
|
|
if (ret < 0) {
|
|
dev_err(dev, "cannot start bus during resume\n");
|
|
intel_link_power_down(sdw);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* after system resume, the pm_runtime suspend() may kick in
|
|
* during the enumeration, before any children device force the
|
|
* master device to remain active. Using pm_runtime_get()
|
|
* routines is not really possible, since it'd prevent the
|
|
* master from suspending.
|
|
* A reasonable compromise is to update the pm_runtime
|
|
* counters and delay the pm_runtime suspend by several
|
|
* seconds, by when all enumeration should be complete.
|
|
*/
|
|
pm_runtime_mark_last_busy(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused intel_resume_runtime(struct device *dev)
|
|
{
|
|
struct sdw_cdns *cdns = dev_get_drvdata(dev);
|
|
struct sdw_intel *sdw = cdns_to_intel(cdns);
|
|
struct sdw_bus *bus = &cdns->bus;
|
|
u32 clock_stop_quirks;
|
|
int ret;
|
|
|
|
if (bus->prop.hw_disabled || !sdw->startup_done) {
|
|
dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
|
|
bus->link_id);
|
|
return 0;
|
|
}
|
|
|
|
/* unconditionally disable WAKEEN interrupt */
|
|
intel_shim_wake(sdw, false);
|
|
|
|
clock_stop_quirks = sdw->link_res->clock_stop_quirks;
|
|
|
|
if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
|
|
ret = intel_link_power_up(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "%s: power_up failed after teardown: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* make sure all Slaves are tagged as UNATTACHED and provide
|
|
* reason for reinitialization
|
|
*/
|
|
sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
|
|
|
|
ret = intel_start_bus(sdw);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
|
|
intel_link_power_down(sdw);
|
|
return ret;
|
|
}
|
|
|
|
|
|
} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) {
|
|
ret = intel_link_power_up(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = intel_start_bus_after_reset(sdw);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
|
|
intel_link_power_down(sdw);
|
|
return ret;
|
|
}
|
|
} else if (!clock_stop_quirks) {
|
|
|
|
intel_check_clock_stop(sdw);
|
|
|
|
ret = intel_link_power_up(sdw);
|
|
if (ret) {
|
|
dev_err(dev, "%s: power_up failed: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = intel_start_bus_after_clock_stop(sdw);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);
|
|
intel_link_power_down(sdw);
|
|
return ret;
|
|
}
|
|
} else {
|
|
dev_err(dev, "%s: clock_stop_quirks %x unsupported\n",
|
|
__func__, clock_stop_quirks);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct dev_pm_ops intel_pm = {
|
|
.prepare = intel_pm_prepare,
|
|
SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
|
|
SET_RUNTIME_PM_OPS(intel_suspend_runtime, intel_resume_runtime, NULL)
|
|
};
|
|
|
|
static const struct auxiliary_device_id intel_link_id_table[] = {
|
|
{ .name = "soundwire_intel.link" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(auxiliary, intel_link_id_table);
|
|
|
|
static struct auxiliary_driver sdw_intel_drv = {
|
|
.probe = intel_link_probe,
|
|
.remove = intel_link_remove,
|
|
.driver = {
|
|
/* auxiliary_driver_register() sets .name to be the modname */
|
|
.pm = &intel_pm,
|
|
},
|
|
.id_table = intel_link_id_table
|
|
};
|
|
module_auxiliary_driver(sdw_intel_drv);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("Intel Soundwire Link Driver");
|