Signed-off-by: Mike Shettel <mshettel@xxxxxxxxxxxxxx>
---
This patch is to be applied on top of the I3C subsystem patchset v6.
drivers/i3c/master/Kconfig | 13 +
drivers/i3c/master/Makefile | 1 +
drivers/i3c/master/i3c-master-qcom-geni.c | 1243 +++++++++++++++++++++++++++++
3 files changed, 1257 insertions(+)
create mode 100644 drivers/i3c/master/i3c-master-qcom-geni.c
diff --git a/drivers/i3c/master/Kconfig b/drivers/i3c/master/Kconfig
index 56b9a18..18ca523 100644
--- a/drivers/i3c/master/Kconfig
+++ b/drivers/i3c/master/Kconfig
@@ -3,3 +3,16 @@ config CDNS_I3C_MASTER
depends on I3C
help
Enable this driver if you want to support Cadence I3C master block.
+
+config I3C_MASTER_QCOM_GENI
+ tristate "Qualcomm Technologies Inc GENI based I3C master"
+ depends on ARCH_QCOM
+ depends on I3C
+ help
+ If you say yes to this option, support will be included for the
+ built-in I3C interface on the Qualcomm Technologies Inc SoCs.
+
+ This driver can also be built as a module. If so, the module
+ will be called i3c-master-qcom-geni
+
+
diff --git a/drivers/i3c/master/Makefile b/drivers/i3c/master/Makefile
index 4c4304a..5d084a9 100644
--- a/drivers/i3c/master/Makefile
+++ b/drivers/i3c/master/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_CDNS_I3C_MASTER) += i3c-master-cdns.o
+obj-$(CONFIG_I3C_MASTER_QCOM_GENI) += i3c-master-qcom-geni.o
diff --git a/drivers/i3c/master/i3c-master-qcom-geni.c b/drivers/i3c/master/i3c-master-qcom-geni.c
new file mode 100644
index 0000000..dfbc257
--- /dev/null
+++ b/drivers/i3c/master/i3c-master-qcom-geni.c
@@ -0,0 +1,1243 @@
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/i3c/master.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/qcom-geni-se.h>
+
+#define SE_I3C_SCL_HIGH 0x268
+#define SE_I3C_TX_TRANS_LEN 0x26C
+#define SE_I3C_RX_TRANS_LEN 0x270
+#define SE_I3C_DELAY_COUNTER 0x274
+#define SE_I2C_SCL_COUNTERS 0x278
+#define SE_I3C_SCL_CYCLE 0x27C
+#define SE_GENI_HW_IRQ_EN 0x920
+#define SE_GENI_HW_IRQ_IGNORE_ON_ACTIVE 0x924
+#define SE_GENI_HW_IRQ_CMD_PARAM_0 0x930
+
+/* SE_GENI_M_CLK_CFG field shifts */
+#define CLK_DEV_VALUE_SHFT 4
+#define SER_CLK_EN_SHFT 0
+
+/* SE_GENI_HW_IRQ_CMD_PARAM_0 field shifts */
+#define M_IBI_IRQ_PARAM_7E_SHFT 0
+#define M_IBI_IRQ_PARAM_STOP_STALL_SHFT 1
+
+/* SE_I2C_SCL_COUNTERS field shifts */
+#define I2C_SCL_HIGH_COUNTER_SHFT 20
+#define I2C_SCL_LOW_COUNTER_SHFT 10
+
+#define SE_I3C_ERR (M_CMD_OVERRUN_EN | M_ILLEGAL_CMD_EN | M_CMD_FAILURE_EN |\
+ M_CMD_ABORT_EN | M_GP_IRQ_0_EN | M_GP_IRQ_1_EN | M_GP_IRQ_2_EN | \
+ M_GP_IRQ_3_EN | M_GP_IRQ_4_EN)
+
+/* M_CMD OP codes for I2C/I3C */
+#define I3C_READ_IBI_HW 0
+#define I2C_WRITE 1
+#define I2C_READ 2
+#define I2C_WRITE_READ 3
+#define I2C_ADDR_ONLY 4
+#define I3C_INBAND_RESET 5
+#define I2C_BUS_CLEAR 6
+#define I2C_STOP_ON_BUS 7
+#define I3C_HDR_DDR_EXIT 8
+#define I3C_PRIVATE_WRITE 9
+#define I3C_PRIVATE_READ 10
+#define I3C_HDR_DDR_WRITE 11
+#define I3C_HDR_DDR_READ 12
+#define I3C_DIRECT_CCC_ADDR_ONLY 13
+#define I3C_BCAST_CCC_ADDR_ONLY 14
+#define I3C_READ_IBI 15
+#define I3C_BCAST_CCC_WRITE 16
+#define I3C_DIRECT_CCC_WRITE 17
+#define I3C_DIRECT_CCC_READ 18
+/* M_CMD params for I3C */
+#define PRE_CMD_DELAY BIT(0)
+#define TIMESTAMP_BEFORE BIT(1)
+#define STOP_STRETCH BIT(2)
+#define TIMESTAMP_AFTER BIT(3)
+#define POST_COMMAND_DELAY BIT(4)
+#define IGNORE_ADD_NACK BIT(6)
+#define READ_FINISHED_WITH_ACK BIT(7)
+#define CONTINUOUS_MODE_DAA BIT(8)
+#define SLV_ADDR_MSK GENMASK(15, 9)
+#define SLV_ADDR_SHFT 9
+#define CCC_HDR_CMD_MSK GENMASK(23, 16)
+#define CCC_HDR_CMD_SHFT 16
+#define IBI_NACK_TBL_CTRL BIT(24)
+#define USE_7E BIT(25)
+#define BYPASS_ADDR_PHASE BIT(26)
+
+enum geni_i3c_err_code {
+ RD_TERM,
+ NACK,
+ CRC_ERR,
+ BUS_PROTO,
+ NACK_7E,
+ NACK_IBI,
+ GENI_OVERRUN,
+ GENI_ILLEGAL_CMD,
+ GENI_ABORT_DONE,
+ GENI_TIMEOUT,
+};
+
+#define DM_I3C_CB_ERR ((BIT(NACK) | BIT(BUS_PROTO) | BIT(NACK_7E)) << 5)
+
+#define I3C_AUTO_SUSPEND_DELAY 250
+#define KHZ(freq) (1000 * freq)
+#define PACKING_BYTES_PW 4
+#define XFER_TIMEOUT HZ
+#define DFS_INDEX_MAX 7
+
+#define I3C_DDR_READ_CMD BIT(7)
+
+#define I3C_ADDR_MASK 0x7f
+
+enum i3c_trans_dir {
+ WRITE_TRANSACTION = 0,
+ READ_TRANSACTION = 1
+};
+
+struct geni_i3c_dev {
+ struct geni_se se;
+ unsigned int tx_wm;
+ int irq;
+ int err;
+ struct i3c_master_controller ctrlr;
+ struct completion done;
+ struct mutex lock;
+ spinlock_t spinlock;
+ u32 clk_src_freq;
+ u32 dfs_idx;
+ u8 *cur_buf;
+ enum i3c_trans_dir cur_rnw;
+ int cur_len;
+ int cur_idx;
+ unsigned long newaddrslots[(I3C_ADDR_MASK + 1) / BITS_PER_LONG];
+ const struct geni_i3c_clk_fld *clk_fld;
+};
+
+struct geni_i3c_i2c_dev_data {
+ u32 dummy; /* placeholder for now, later will hold IBI information */
+};
+
+
+struct i3c_xfer_params {
+ enum geni_se_xfer_mode mode;
+ u32 m_cmd;
+ u32 m_param;
+};
+
+static inline struct geni_i3c_dev*
+to_geni_i3c_master(struct i3c_master_controller *master)
+{
+ return container_of(master, struct geni_i3c_dev, ctrlr);
+}
+
+struct geni_i3c_err_log {
+ int err;
+ const char *msg;
+};
+
+static struct geni_i3c_err_log gi3c_log[] = {
+ [RD_TERM] = { -EINVAL, "I3C slave early read termination" },
+ [NACK] = { -ENOTCONN, "NACK: slave unresponsive, check power/reset" },
+ [CRC_ERR] = { -EINVAL, "CRC or parity error" },
+ [BUS_PROTO] = { -EPROTO, "Bus proto err, noisy/unexpected start/stop" },
+ [NACK_7E] = { -EBUSY, "NACK on 7E, unexpected protocol error" },
+ [NACK_IBI] = { -EINVAL, "NACK on IBI" },
+ [GENI_OVERRUN] = { -EIO, "Cmd overrun, check GENI cmd-state machine" },
+ [GENI_ILLEGAL_CMD] = { -EILSEQ,
+ "Illegal cmd, check GENI cmd-state machine" },
+ [GENI_ABORT_DONE] = { -ETIMEDOUT, "Abort after timeout successful" },
+ [GENI_TIMEOUT] = { -ETIMEDOUT, "I3C transaction timed out" },
+};
+
+struct geni_i3c_clk_fld {
+ u32 clk_freq_out;
+ u32 clk_src_freq;
+ u8 clk_div;
+ u8 i2c_t_high_cnt;
+ u8 i2c_t_low_cnt;
+ u8 i2c_t_cycle_cnt;
+ u8 i3c_t_high_cnt;
+ u8 i3c_t_cycle_cnt;
+};
+
+/*
+ * Hardware uses the underlying formula to calculate time periods of
+ * SCL clock cycle. Firmware uses some additional cycles excluded from the
+ * below formula and it is confirmed that the time periods are within
+ * specification limits.
+ *
+ * time of high period of I2C SCL:
+ * i2c_t_high = (i2c_t_high_cnt * clk_div) / source_clock
+ * time of low period of I2C SCL:
+ * i2c_t_low = (i2c_t_low_cnt * clk_div) / source_clock
+ * time of full period of I2C SCL:
+ * i2c_t_cycle = (i2c_t_cycle_cnt * clk_div) / source_clock
+ * time of high period of I3C SCL:
+ * i3c_t_high = (i3c_t_high_cnt * clk_div) / source_clock
+ * time of full period of I3C SCL:
+ * i3c_t_cycle = (i3c_t_cycle_cnt * clk_div) / source_clock
+ * clk_freq_out = t / t_cycle
+ */
+static const struct geni_i3c_clk_fld geni_i3c_clk_map[] = {
+ { KHZ(100), 19200, 7, 10, 11, 26, 0, 0 },
+ { KHZ(400), 19200, 2, 5, 12, 24, 0, 0 },
+ { KHZ(1000), 19200, 1, 3, 9, 18, 0, 0 },
+ { KHZ(12500), 100000, 1, 60, 140, 250, 8, 16 },
+};
+
+static int geni_i3c_clk_map_idx(struct geni_i3c_dev *gi3c)
+{
+ int i;
+ const struct geni_i3c_clk_fld *itr = geni_i3c_clk_map;
+
+ for (i = 0; i < ARRAY_SIZE(geni_i3c_clk_map); i++, itr++) {
+ if ((!gi3c->ctrlr.bus ||
+ itr->clk_freq_out == gi3c->ctrlr.bus->scl_rate.i3c) &&
+ KHZ(itr->clk_src_freq) == gi3c->clk_src_freq) {
+ gi3c->clk_fld = itr;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static void set_new_addr_slot(unsigned long *addrslot, u8 addr)
+{
+ unsigned long *ptr;
+
+ if (addr > I3C_ADDR_MASK)
+ return;
+
+ ptr = addrslot + (addr / BITS_PER_LONG);
+ *ptr |= 1 << (addr % BITS_PER_LONG);
+}
+
+static void clear_new_addr_slot(unsigned long *addrslot, u8 addr)
+{
+ unsigned long *ptr;
+
+ if (addr > I3C_ADDR_MASK)
+ return;
+
+ ptr = addrslot + (addr / BITS_PER_LONG);
+ *ptr &= ~(1 << (addr % BITS_PER_LONG));
+}
+
+static bool is_new_addr_slot_set(unsigned long *addrslot, u8 addr)
+{
+ unsigned long *ptr;
+
+ if (addr > I3C_ADDR_MASK)
+ return false;
+
+ ptr = addrslot + (addr / BITS_PER_LONG);
+ return ((*ptr & (1 << (addr % BITS_PER_LONG))) != 0);
+}
+
+static inline void qcom_geni_i3c_conf(struct geni_i3c_dev *gi3c)
+{
+ const struct geni_i3c_clk_fld *itr = gi3c->clk_fld;
+ u32 val;
+ unsigned long freq;
+ int ret = 0;
+
+ if (gi3c->dfs_idx > DFS_INDEX_MAX)
+ ret = geni_se_clk_freq_match(&gi3c->se, KHZ(itr->clk_src_freq),
+ &gi3c->dfs_idx, &freq, false);
+ if (ret)
+ gi3c->dfs_idx = 0;
+
+ writel_relaxed(gi3c->dfs_idx, gi3c->se.base + SE_GENI_CLK_SEL);
+
+ val = itr->clk_div << CLK_DEV_VALUE_SHFT;
+ val |= 1 << SER_CLK_EN_SHFT;
+ writel_relaxed(val, gi3c->se.base + GENI_SER_M_CLK_CFG);
+
+ val = itr->i2c_t_high_cnt << I2C_SCL_HIGH_COUNTER_SHFT;
+ val |= itr->i2c_t_low_cnt << I2C_SCL_LOW_COUNTER_SHFT;
+ val |= itr->i2c_t_cycle_cnt;
+ writel_relaxed(val, gi3c->se.base + SE_I2C_SCL_COUNTERS);
+
+ writel_relaxed(itr->i3c_t_cycle_cnt, gi3c->se.base + SE_I3C_SCL_CYCLE);
+ writel_relaxed(itr->i3c_t_high_cnt, gi3c->se.base + SE_I3C_SCL_HIGH);
+
+ writel_relaxed(1, gi3c->se.base + SE_GENI_HW_IRQ_IGNORE_ON_ACTIVE);
+
+ val = 1 << M_IBI_IRQ_PARAM_STOP_STALL_SHFT;
+ val |= 1 << M_IBI_IRQ_PARAM_7E_SHFT;
+ writel_relaxed(val, gi3c->se.base + SE_GENI_HW_IRQ_CMD_PARAM_0);
+
+ writel_relaxed(1, gi3c->se.base + SE_GENI_HW_IRQ_EN);
+}
+
+static void geni_i3c_err(struct geni_i3c_dev *gi3c, int err)
+{
+ if (gi3c->cur_rnw == WRITE_TRANSACTION)
+ dev_dbg(gi3c->se.dev, "len:%d, write\n", gi3c->cur_len);
+ else
+ dev_dbg(gi3c->se.dev, "len:%d, read\n", gi3c->cur_len);
+
+ dev_dbg(gi3c->se.dev, "%s\n", gi3c_log[err].msg);
+ gi3c->err = gi3c_log[err].err;
+}
+
+static irqreturn_t geni_i3c_irq(int irq, void *dev)
+{
+ struct geni_i3c_dev *gi3c = dev;
+ int j;
+ u32 m_stat;
+ u32 m_stat_mask;
+ u32 rx_st;
+ u32 dm_tx_st;
+ u32 dm_rx_st;
+ u32 dma;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gi3c->spinlock, flags);
+
+ m_stat = readl_relaxed(gi3c->se.base + SE_GENI_M_IRQ_STATUS);
+ m_stat_mask = readl_relaxed(gi3c->se.base + SE_GENI_M_IRQ_EN);
+ rx_st = readl_relaxed(gi3c->se.base + SE_GENI_RX_FIFO_STATUS);
+ dm_tx_st = readl_relaxed(gi3c->se.base + SE_DMA_TX_IRQ_STAT);
+ dm_rx_st = readl_relaxed(gi3c->se.base + SE_DMA_RX_IRQ_STAT);
+ dma = readl_relaxed(gi3c->se.base + SE_GENI_DMA_MODE_EN);
+
+ if ((m_stat & SE_I3C_ERR) ||
+ (dm_rx_st & DM_I3C_CB_ERR)) {
+ if (m_stat & M_GP_IRQ_0_EN)
+ geni_i3c_err(gi3c, RD_TERM);
+ if (m_stat & M_GP_IRQ_1_EN)
+ geni_i3c_err(gi3c, NACK);
+ if (m_stat & M_GP_IRQ_2_EN)
+ geni_i3c_err(gi3c, CRC_ERR);
+ if (m_stat & M_GP_IRQ_3_EN)
+ geni_i3c_err(gi3c, BUS_PROTO);
+ if (m_stat & M_GP_IRQ_4_EN)
+ geni_i3c_err(gi3c, NACK_7E);
+ if (m_stat & M_CMD_OVERRUN_EN)
+ geni_i3c_err(gi3c, GENI_OVERRUN);
+ if (m_stat & M_ILLEGAL_CMD_EN)
+ geni_i3c_err(gi3c, GENI_ILLEGAL_CMD);
+ if (m_stat & M_CMD_ABORT_EN)
+ geni_i3c_err(gi3c, GENI_ABORT_DONE);
+
+ /* Disable the TX Watermark interrupt to stop TX */
+ if (!dma)
+ writel_relaxed(0, gi3c->se.base +
+ SE_GENI_TX_WATERMARK_REG);
+ goto irqret;
+ }
+
+ if (dma) {
+ dev_dbg(gi3c->se.dev, "i3c dma tx:0x%x, dma rx:0x%x\n",
+ dm_tx_st, dm_rx_st);
+ goto irqret;
+ }
+
+ if ((m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) &&
+ (gi3c->cur_rnw == READ_TRANSACTION) &&
+ gi3c->cur_buf) {
+ u32 rxcnt = rx_st & RX_FIFO_WC_MSK;
+
+ for (j = 0; j < rxcnt; j++) {
+ u32 val;
+ int p = 0;
+
+ val = readl_relaxed(gi3c->se.base + SE_GENI_RX_FIFOn);
+ while (gi3c->cur_idx < gi3c->cur_len &&
+ p < sizeof(val)) {
+ gi3c->cur_buf[gi3c->cur_idx++] = val & 0xff;
+ val >>= 8;
+ p++;
+ }
+ if (gi3c->cur_idx == gi3c->cur_len)
+ break;
+ }
+ } else if ((m_stat & M_TX_FIFO_WATERMARK_EN) &&
+ (gi3c->cur_rnw == WRITE_TRANSACTION) &&
+ (gi3c->cur_buf)) {
+ for (j = 0; j < gi3c->tx_wm; j++) {
+ u32 temp;
+ u32 val = 0;
+ int p = 0;
+
+ while (gi3c->cur_idx < gi3c->cur_len &&
+ p < sizeof(val)) {
+ temp = gi3c->cur_buf[gi3c->cur_idx++];
+ val |= temp << (p * 8);
+ p++;
+ }
+ writel_relaxed(val, gi3c->se.base + SE_GENI_TX_FIFOn);
+ if (gi3c->cur_idx == gi3c->cur_len) {
+ writel_relaxed(0, gi3c->se.base +
+ SE_GENI_TX_WATERMARK_REG);
+ break;
+ }
+ }
+ }
+irqret:
+ if (m_stat)
+ writel_relaxed(m_stat, gi3c->se.base + SE_GENI_M_IRQ_CLEAR);
+
+ if (dma) {
+ if (dm_tx_st)
+ writel_relaxed(dm_tx_st,
+ gi3c->se.base + SE_DMA_TX_IRQ_CLR);
+ if (dm_rx_st)
+ writel_relaxed(dm_rx_st,
+ gi3c->se.base + SE_DMA_RX_IRQ_CLR);
+ }
+ /* if this is err with done-bit not set, handle that through timeout. */
+ if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN) {
+ writel_relaxed(0, gi3c->se.base + SE_GENI_TX_WATERMARK_REG);
+ complete(&gi3c->done);
+ } else if ((dm_tx_st & TX_DMA_DONE) ||
+ (dm_rx_st & RX_DMA_DONE) ||
+ (dm_rx_st & RX_RESET_DONE))
+ complete(&gi3c->done);
+
+ spin_unlock_irqrestore(&gi3c->spinlock, flags);
+ return IRQ_HANDLED;
+}
+
+static int i3c_geni_runtime_get_mutex_lock(struct geni_i3c_dev *gi3c)
+{
+ int ret;
+
+ mutex_lock(&gi3c->lock);
+
+ reinit_completion(&gi3c->done);
+ ret = pm_runtime_get_sync(gi3c->se.dev);
+ if (ret < 0) {
+ dev_err(gi3c->se.dev,
+ "error turning on SE resources:%d\n", ret);
+ pm_runtime_put_noidle(gi3c->se.dev);
+ /* Set device in suspended since resume failed */
+ pm_runtime_set_suspended(gi3c->se.dev);
+
+ mutex_unlock(&gi3c->lock);
+
+ return ret;
+ }
+
+ qcom_geni_i3c_conf(gi3c);
+
+ return 0; /* return 0 to indicate SUCCESS */
+}
+
+static void i3c_geni_runtime_put_mutex_unlock(struct geni_i3c_dev *gi3c)
+{
+ pm_runtime_mark_last_busy(gi3c->se.dev);
+ pm_runtime_put_autosuspend(gi3c->se.dev);
+ mutex_unlock(&gi3c->lock);
+}
+
+static int _i3c_geni_execute_command
+(
+ struct geni_i3c_dev *gi3c,
+ struct i3c_xfer_params *xfer
+)
+{
+ dma_addr_t tx_dma = 0;
+ dma_addr_t rx_dma = 0;
+ int ret, time_remaining = 0;
+ enum i3c_trans_dir rnw = gi3c->cur_rnw;
+ u32 len = gi3c->cur_len;
+
+ geni_se_select_mode(&gi3c->se, xfer->mode);
+
+ gi3c->err = 0;
+ gi3c->cur_idx = 0;
+
+ if (rnw == READ_TRANSACTION) {
+ dev_dbg(gi3c->se.dev, "I3C cmd:0x%x param:0x%x READ len:%d\n",
+ xfer->m_cmd, xfer->m_param, len);
+ writel_relaxed(len, gi3c->se.base + SE_I3C_RX_TRANS_LEN);
+ geni_se_setup_m_cmd(&gi3c->se, xfer->m_cmd, xfer->m_param);
+ if (xfer->mode == GENI_SE_DMA) {
+ ret = geni_se_rx_dma_prep(&gi3c->se, gi3c->cur_buf,
+ len, &rx_dma);
+ if (ret) {
+ xfer->mode = GENI_SE_FIFO;
+ geni_se_select_mode(&gi3c->se, xfer->mode);
+ }
+ }
+ } else {
+ dev_dbg(gi3c->se.dev, "I3C cmd:0x%x param:0x%x WRITE len:%d\n",
+ xfer->m_cmd, xfer->m_param, len);
+ writel_relaxed(len, gi3c->se.base + SE_I3C_TX_TRANS_LEN);
+ geni_se_setup_m_cmd(&gi3c->se, xfer->m_cmd, xfer->m_param);
+ if (xfer->mode == GENI_SE_DMA) {
+ ret = geni_se_tx_dma_prep(&gi3c->se, gi3c->cur_buf,
+ len, &tx_dma);
+ if (ret) {
+ xfer->mode = GENI_SE_FIFO;
+ geni_se_select_mode(&gi3c->se, xfer->mode);
+ }
+ }
+ if (xfer->mode == GENI_SE_FIFO && len > 0) /* Get FIFO IRQ */
+ writel_relaxed(1, gi3c->se.base +
+ SE_GENI_TX_WATERMARK_REG);
+ }
+ time_remaining = wait_for_completion_timeout(&gi3c->done,
+ XFER_TIMEOUT);
+ if (!time_remaining) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&gi3c->spinlock, flags);
+ geni_i3c_err(gi3c, GENI_TIMEOUT);
+ gi3c->cur_buf = NULL;
+ gi3c->cur_len = gi3c->cur_idx = 0;
+ gi3c->cur_rnw = 0;
+ geni_se_abort_m_cmd(&gi3c->se);
+ spin_unlock_irqrestore(&gi3c->spinlock, flags);
+ time_remaining = wait_for_completion_timeout(&gi3c->done,
+ XFER_TIMEOUT);
+ }
+ if (xfer->mode == GENI_SE_DMA) {
+ if (gi3c->err) {
+ if (rnw == READ_TRANSACTION)
+ writel_relaxed(1, gi3c->se.base +
+ SE_DMA_TX_FSM_RST);
+ else
+ writel_relaxed(1, gi3c->se.base +
+ SE_DMA_RX_FSM_RST);
+ wait_for_completion_timeout(&gi3c->done, XFER_TIMEOUT);
+ }
+ geni_se_rx_dma_unprep(&gi3c->se, rx_dma, len);
+ geni_se_tx_dma_unprep(&gi3c->se, tx_dma, len);
+ }
+ ret = gi3c->err;
+ if (gi3c->err)
+ dev_err(gi3c->se.dev, "I3C transaction error :%d\n", gi3c->err);
+
+ gi3c->cur_buf = NULL;
+ gi3c->cur_len = gi3c->cur_idx = 0;
+ gi3c->cur_rnw = 0;
+ gi3c->err = 0;
+
+ return ret;
+}
+
+static int i3c_geni_execute_read_command
+(
+ struct geni_i3c_dev *gi3c,
+ struct i3c_xfer_params *xfer,
+ u8 *buf,
+ u32 len
+)
+{
+ gi3c->cur_rnw = READ_TRANSACTION;
+ gi3c->cur_buf = buf;
+ gi3c->cur_len = len;
+ return _i3c_geni_execute_command(gi3c, xfer);
+}
+
+static int i3c_geni_execute_write_command
+(
+ struct geni_i3c_dev *gi3c,
+ struct i3c_xfer_params *xfer,
+ u8 *buf,
+ u32 len
+)
+{
+ gi3c->cur_rnw = WRITE_TRANSACTION;
+ gi3c->cur_buf = buf;
+ gi3c->cur_len = len;
+ return _i3c_geni_execute_command(gi3c, xfer);
+}
+
+static void geni_i3c_perform_daa(struct geni_i3c_dev *gi3c)
+{
+ u8 last_dyn_addr = 0;
+ int ret;
+
+ while (1) {
+ u8 rx_buf[8], tx_buf[8];
+ struct i3c_xfer_params xfer = { GENI_SE_FIFO };
+ struct i3c_device_info info = { 0 };
+ struct i3c_dev_desc *i3cdev;
+ bool new_device = true;
+ u64 pid;
+ u8 bcr, dcr, addr;
+
+ dev_dbg(gi3c->se.dev, "i3c entdaa read\n");
+
+ xfer.m_cmd = I2C_READ;
+ xfer.m_param = STOP_STRETCH | CONTINUOUS_MODE_DAA | USE_7E;
+
+ ret = i3c_geni_execute_read_command(gi3c, &xfer, rx_buf, 8);
+ if (ret)
+ break;
+
+ dcr = rx_buf[7];
+ bcr = rx_buf[6];
+ pid = ((u64)rx_buf[0] << 40) |
+ ((u64)rx_buf[1] << 32) |
+ ((u64)rx_buf[2] << 24) |
+ ((u64)rx_buf[3] << 16) |
+ ((u64)rx_buf[4] << 8) |
+ ((u64)rx_buf[5]);
+
+ i3c_bus_for_each_i3cdev(gi3c->ctrlr.bus, i3cdev) {
+ i3c_device_get_info(i3cdev->dev, &info);
+ if (pid == info.pid &&
+ dcr == info.dcr &&
+ bcr == info.bcr) {
+ new_device = false;
+ addr = (info.dyn_addr) ? info.dyn_addr :
+ info.static_addr;
+ break;
+ }
+ }
+
+ if (new_device) {
+ ret = i3c_master_get_free_addr(&gi3c->ctrlr,
+ last_dyn_addr + 1);
+ if (ret < 0)
+ goto daa_err;
+ addr = last_dyn_addr = (u8)ret;
+ set_new_addr_slot(gi3c->newaddrslots, addr);
+ }
+
+ tx_buf[0] = (addr & I3C_ADDR_MASK) << 1;
+ tx_buf[0] |= ~(hweight8(addr & I3C_ADDR_MASK) & 1);
+
+ dev_dbg(gi3c->se.dev, "i3c entdaa write\n");
+
+ xfer.m_cmd = I2C_WRITE;
+ xfer.m_param = STOP_STRETCH | BYPASS_ADDR_PHASE | USE_7E;
+
+ ret = i3c_geni_execute_write_command(gi3c, &xfer, tx_buf, 1);
+ if (ret)
+ break;
+ }
+daa_err:
+ return;
+}
+
+static int geni_i3c_master_send_ccc_cmd
+(
+ struct i3c_master_controller *m,
+ struct i3c_ccc_cmd *cmd
+)
+{
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+ int i, ret;
+
+ if (!(cmd->id & I3C_CCC_DIRECT) && (cmd->ndests != 1))
+ return -1;
+
+ ret = i3c_geni_runtime_get_mutex_lock(gi3c);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < cmd->ndests; i++) {
+ int stall = (i < (cmd->ndests - 1)) ||
+ (cmd->id == I3C_CCC_ENTDAA);
+ struct i3c_xfer_params xfer = { GENI_SE_FIFO };
+
+ xfer.m_param = (stall ? STOP_STRETCH : 0);
+ xfer.m_param |= (cmd->id << CCC_HDR_CMD_SHFT);
+ xfer.m_param |= IBI_NACK_TBL_CTRL;
+ if (cmd->id & I3C_CCC_DIRECT) {
+ xfer.m_param |= ((cmd->dests[i].addr & I3C_ADDR_MASK)
+ << SLV_ADDR_SHFT);
+ if (cmd->rnw) {
+ if (i == 0)
+ xfer.m_cmd = I3C_DIRECT_CCC_READ;
+ else
+ xfer.m_cmd = I3C_PRIVATE_READ;
+ } else {
+ if (i == 0)
+ xfer.m_cmd =
+ (cmd->dests[i].payload.len > 0) ?
+ I3C_DIRECT_CCC_WRITE :
+ I3C_DIRECT_CCC_ADDR_ONLY;
+ else
+ xfer.m_cmd = I3C_PRIVATE_WRITE;
+ }
+ } else {
+ if (cmd->dests[i].payload.len > 0)
+ xfer.m_cmd = I3C_BCAST_CCC_WRITE;
+ else
+ xfer.m_cmd = I3C_BCAST_CCC_ADDR_ONLY;
+ }
+
+ if (i == 0)
+ xfer.m_param |= USE_7E;
+
+ if (cmd->rnw)
+ ret = i3c_geni_execute_read_command(gi3c, &xfer,
+ cmd->dests[i].payload.data,
+ cmd->dests[i].payload.len);
+ else
+ ret = i3c_geni_execute_write_command(gi3c, &xfer,
+ cmd->dests[i].payload.data,
+ cmd->dests[i].payload.len);
+ if (ret)
+ break;
+
+ if (cmd->id == I3C_CCC_ENTDAA)
+ geni_i3c_perform_daa(gi3c);
+ }
+
+ dev_dbg(gi3c->se.dev, "i3c ccc: txn ret:%d\n", ret);
+
+ i3c_geni_runtime_put_mutex_unlock(gi3c);
+
+ return ret;
+}
+
+static int geni_i3c_master_priv_xfers
+(
+ struct i3c_dev_desc *dev,
+ struct i3c_priv_xfer *xfers,
+ int nxfers
+)
+{
+ struct i3c_master_controller *m = i3c_dev_get_master(dev);
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+ int i, ret;
+ bool use_7e = true;
+
+ if (nxfers <= 0)
+ return 0;
+
+ ret = i3c_geni_runtime_get_mutex_lock(gi3c);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < nxfers; i++) {
+ bool stall = (i < (nxfers - 1));
+ struct i3c_xfer_params xfer = { GENI_SE_FIFO };
+
+ xfer.m_param = (stall ? STOP_STRETCH : 0);
+ xfer.m_param |= ((dev->info.dyn_addr & I3C_ADDR_MASK)
+ << SLV_ADDR_SHFT);
+ xfer.m_param |= (use_7e) ? USE_7E : 0;
+
+ /* Update use_7e status for next loop iteration */
+ use_7e = !stall;
+
+ if (xfers[i].rnw) {
+ xfer.m_cmd = I3C_PRIVATE_READ;
+ ret = i3c_geni_execute_read_command(gi3c, &xfer,
+ (u8 *)xfers[i].data.in,
+ xfers[i].len);
+ } else {
+ xfer.m_cmd = I3C_PRIVATE_WRITE;
+ ret = i3c_geni_execute_write_command(gi3c, &xfer,
+ (u8 *)xfers[i].data.out,
+ xfers[i].len);
+ }
+
+ if (ret)
+ break;
+ }
+
+ dev_dbg(gi3c->se.dev, "i3c priv: txn ret:%d\n", ret);
+
+ i3c_geni_runtime_put_mutex_unlock(gi3c);
+
+ return ret;
+}
+
+static int geni_i3c_master_i2c_xfers
+(
+ struct i2c_dev_desc *dev,
+ const struct i2c_msg *msgs,
+ int num
+)
+{
+ struct i3c_master_controller *m = i2c_dev_get_master(dev);
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+ int i, ret;
+
+ ret = i3c_geni_runtime_get_mutex_lock(gi3c);
+ if (ret)
+ return ret;
+
+ dev_dbg(gi3c->se.dev, "i2c xfer:num:%d, msgs:len:%d,flg:%d\n",
+ num, msgs[0].len, msgs[0].flags);
+ for (i = 0; i < num; i++) {
+ struct i3c_xfer_params xfer;
+
+ xfer.m_cmd = (msgs[i].flags & I2C_M_RD) ? I2C_READ :
+ I2C_WRITE;
+ xfer.m_param = (i < (num - 1)) ? STOP_STRETCH : 0;
+ xfer.m_param |= ((msgs[i].addr & I3C_ADDR_MASK)
+ << SLV_ADDR_SHFT);
+ xfer.mode = msgs[i].len > 32 ? GENI_SE_DMA : GENI_SE_FIFO;
+ if (msgs[i].flags & I2C_M_RD)
+ ret = i3c_geni_execute_read_command(gi3c, &xfer,
+ msgs[i].buf, msgs[i].len);
+ else
+ ret = i3c_geni_execute_write_command(gi3c, &xfer,
+ msgs[i].buf, msgs[i].len);
+ if (ret)
+ break;
+ }
+
+ dev_dbg(gi3c->se.dev, "i2c: txn ret:%d\n", ret);
+
+ i3c_geni_runtime_put_mutex_unlock(gi3c);
+
+ return ret;
+}
+
+static u32 geni_i3c_master_i2c_funcs(struct i3c_master_controller *m)
+{
+ return I2C_FUNC_I2C;
+}
+
+static int geni_i3c_master_attach_i2c_dev(struct i2c_dev_desc *dev)
+{
+ struct i3c_master_controller *m = i2c_dev_get_master(dev);
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+ struct geni_i3c_i2c_dev_data *data;
+
+ data = devm_kzalloc(gi3c->se.dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ memset(data, 0, sizeof(*data));
+
+ i2c_dev_set_master_data(dev, data);
+
+ return 0;
+}
+
+
+static void geni_i3c_master_detach_i2c_dev(struct i2c_dev_desc *dev)
+{
+ struct geni_i3c_i2c_dev_data *data = i2c_dev_get_master_data(dev);
+
+ i2c_dev_set_master_data(dev, NULL);
+ kfree(data);
+}
+
+
+static int geni_i3c_master_attach_i3c_dev(struct i3c_dev_desc *dev)
+{
+ struct i3c_master_controller *m = i3c_dev_get_master(dev);
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+ struct geni_i3c_i2c_dev_data *data;
+
+ data = devm_kzalloc(gi3c->se.dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i3c_dev_set_master_data(dev, data);
+
+ // Todo: update max FSCL
+
+ return 0;
+}
+
+static int geni_i3c_master_reattach_i3c_dev
+(
+ struct i3c_dev_desc *dev,
+ u8 old_dyn_addr
+)
+{
+ return 0;
+}
+
+static void geni_i3c_master_detach_i3c_dev(struct i3c_dev_desc *dev)
+{
+ struct geni_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
+
+ i3c_dev_set_master_data(dev, NULL);
+ kfree(data);
+}
+
+static int geni_i3c_master_entdaa_locked(struct geni_i3c_dev *gi3c)
+{
+ u8 addr;
+ int ret;
+
+ ret = i3c_master_entdaa_locked(&gi3c->ctrlr);
+ if (ret && ret != I3C_ERROR_M2)
+ return ret;
+
+ for (addr = 0; addr <= I3C_ADDR_MASK; addr++) {
+ if (is_new_addr_slot_set(gi3c->newaddrslots, addr)) {
+ clear_new_addr_slot(gi3c->newaddrslots, addr);
+ i3c_master_add_i3c_dev_locked(&gi3c->ctrlr, addr);
+ }
+ }
+
+ return 0;
+}
+
+static int geni_i3c_master_do_daa(struct i3c_master_controller *m)
+{
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+
+ return geni_i3c_master_entdaa_locked(gi3c);
+}
+
+static int geni_i3c_master_bus_init(struct i3c_master_controller *m)
+{
+ struct geni_i3c_dev *gi3c = to_geni_i3c_master(m);
+ struct i3c_device_info info = { };
+ int ret;
+
+ ret = pm_runtime_get_sync(gi3c->se.dev);
+ if (ret < 0) {
+ dev_err(gi3c->se.dev, "%s: error turning SE resources:%d\n",
+ __func__, ret);
+ pm_runtime_put_noidle(gi3c->se.dev);
+ /* Set device in suspended since resume failed */
+ pm_runtime_set_suspended(gi3c->se.dev);
+ return ret;
+ }
+
+ ret = geni_i3c_clk_map_idx(gi3c);
+ if (ret) {
+ dev_err(gi3c->se.dev,
+ "Invalid clk frequency %d Hz src or %ld Hz bus: %d\n",
+ gi3c->clk_src_freq, gi3c->ctrlr.bus->scl_rate.i3c,
+ ret);
+ goto err_cleanup;
+ }
+
+ qcom_geni_i3c_conf(gi3c);
+
+ /* Get an address for the master. */
+ ret = i3c_master_get_free_addr(m, 0);
+ if (ret < 0)
+ goto err_cleanup;
+
+ info.dyn_addr = ret;
+ info.dcr = I3C_DCR_GENERIC_DEVICE;
+ info.bcr = I3C_BCR_I3C_MASTER | I3C_BCR_HDR_CAP;
+ info.pid = 0;
+
+ ret = i3c_master_set_info(&gi3c->ctrlr, &info);
+
+err_cleanup:
+ pm_runtime_mark_last_busy(gi3c->se.dev);
+ pm_runtime_put_autosuspend(gi3c->se.dev);
+
+ return ret;
+}
+static void geni_i3c_master_bus_cleanup(struct i3c_master_controller *m)
+{
+}
+
+static bool geni_i3c_master_supports_ccc_cmd
+(
+ struct i3c_master_controller *m,
+ const struct i3c_ccc_cmd *cmd
+)
+{
+ switch (cmd->id) {
+ case I3C_CCC_ENEC(true):
+ /* fallthrough */
+ case I3C_CCC_ENEC(false):
+ /* fallthrough */
+ case I3C_CCC_DISEC(true):
+ /* fallthrough */
+ case I3C_CCC_DISEC(false):
+ /* fallthrough */
+ case I3C_CCC_ENTAS(0, true):
+ /* fallthrough */
+ case I3C_CCC_ENTAS(0, false):
+ /* fallthrough */
+ case I3C_CCC_RSTDAA(true):
+ /* fallthrough */
+ case I3C_CCC_RSTDAA(false):
+ /* fallthrough */
+ case I3C_CCC_ENTDAA:
+ /* fallthrough */
+ case I3C_CCC_SETMWL(true):
+ /* fallthrough */
+ case I3C_CCC_SETMWL(false):
+ /* fallthrough */
+ case I3C_CCC_SETMRL(true):
+ /* fallthrough */
+ case I3C_CCC_SETMRL(false):
+ /* fallthrough */
+ case I3C_CCC_DEFSLVS:
+ /* fallthrough */
+ case I3C_CCC_ENTHDR(0):
+ /* fallthrough */
+ case I3C_CCC_SETDASA:
+ /* fallthrough */
+ case I3C_CCC_SETNEWDA:
+ /* fallthrough */
+ case I3C_CCC_GETMWL:
+ /* fallthrough */
+ case I3C_CCC_GETMRL:
+ /* fallthrough */
+ case I3C_CCC_GETPID:
+ /* fallthrough */
+ case I3C_CCC_GETBCR:
+ /* fallthrough */
+ case I3C_CCC_GETDCR:
+ /* fallthrough */
+ case I3C_CCC_GETSTATUS:
+ /* fallthrough */
+ case I3C_CCC_GETACCMST:
+ /* fallthrough */
+ case I3C_CCC_GETMXDS:
+ /* fallthrough */
+ case I3C_CCC_GETHDRCAP:
+ return true;
+ default:
+ break;
+ }
+
+ return false;
+}
+
+int geni_i3c_master_enable_ibi(struct i3c_dev_desc *dev)
+{
+ return -ENOTSUPP;
+}
+
+int geni_i3c_master_disable_ibi(struct i3c_dev_desc *dev)
+{
+ return -ENOTSUPP;
+}
+
+int geni_i3c_master_request_ibi(struct i3c_dev_desc *dev,
+ const struct i3c_ibi_setup *req)
+{
+ return -ENOTSUPP;
+}
+
+static void geni_i3c_master_free_ibi(struct i3c_dev_desc *dev)
+{
+}
+
+static void geni_i3c_master_recycle_ibi_slot
+(
+ struct i3c_dev_desc *dev,
+ struct i3c_ibi_slot *slot
+)
+{
+}
+
+static const struct i3c_master_controller_ops geni_i3c_master_ops = {
+ .bus_init = geni_i3c_master_bus_init,
+ .bus_cleanup = geni_i3c_master_bus_cleanup,
+ .do_daa = geni_i3c_master_do_daa,
+ .attach_i3c_dev = geni_i3c_master_attach_i3c_dev,
+ .reattach_i3c_dev = geni_i3c_master_reattach_i3c_dev,
+ .detach_i3c_dev = geni_i3c_master_detach_i3c_dev,
+ .attach_i2c_dev = geni_i3c_master_attach_i2c_dev,
+ .detach_i2c_dev = geni_i3c_master_detach_i2c_dev,
+ .supports_ccc_cmd = geni_i3c_master_supports_ccc_cmd,
+ .send_ccc_cmd = geni_i3c_master_send_ccc_cmd,
+ .priv_xfers = geni_i3c_master_priv_xfers,
+ .i2c_xfers = geni_i3c_master_i2c_xfers,
+ .i2c_funcs = geni_i3c_master_i2c_funcs,
+ .enable_ibi = geni_i3c_master_enable_ibi,
+ .disable_ibi = geni_i3c_master_disable_ibi,
+ .request_ibi = geni_i3c_master_request_ibi,
+ .free_ibi = geni_i3c_master_free_ibi,
+ .recycle_ibi_slot = geni_i3c_master_recycle_ibi_slot,
+};
+
+static int geni_i3c_probe(struct platform_device *pdev)
+{
+ struct geni_i3c_dev *gi3c;
+ struct resource *res;
+ u32 proto, tx_depth;
+ int ret;
+
+ gi3c = devm_kzalloc(&pdev->dev, sizeof(*gi3c), GFP_KERNEL);
+ if (!gi3c)
+ return -ENOMEM;
+
+ gi3c->se.dev = &pdev->dev;
+ gi3c->se.wrapper = dev_get_drvdata(pdev->dev.parent);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ gi3c->se.base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(gi3c->se.base))
+ return PTR_ERR(gi3c->se.base);
+
+ gi3c->se.clk = devm_clk_get(&pdev->dev, "se");
+ if (IS_ERR(gi3c->se.clk)) {
+ ret = PTR_ERR(gi3c->se.clk);
+ dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
+ return ret;
+ }
+
+ ret = device_property_read_u32(&pdev->dev, "se-clock-frequency",
+ &gi3c->clk_src_freq);
+ if (ret) {
+ dev_info(&pdev->dev,
+ "SE clk freq not specified, default to 100 MHz.\n");
+ gi3c->clk_src_freq = 100000000;
+ }
+
+
+ ret = device_property_read_u32(&pdev->dev, "dfs-index",
+ &gi3c->dfs_idx);
+ if (ret)
+ gi3c->dfs_idx = 0xf;
+
+ gi3c->irq = platform_get_irq(pdev, 0);
+ if (gi3c->irq < 0) {
+ dev_err(&pdev->dev, "IRQ error for i3c-master-geni\n");
+ return gi3c->irq;
+ }
+
+ ret = geni_i3c_clk_map_idx(gi3c);
+ if (ret) {
+ dev_err(&pdev->dev, "Invalid source clk frequency %d Hz: %d\n",
+ gi3c->clk_src_freq, ret);
+ return ret;
+ }
+
+ init_completion(&gi3c->done);
+ mutex_init(&gi3c->lock);
+ spin_lock_init(&gi3c->spinlock);
+ platform_set_drvdata(pdev, gi3c);
+ ret = devm_request_irq(&pdev->dev, gi3c->irq, geni_i3c_irq,
+ IRQF_TRIGGER_HIGH, dev_name(&pdev->dev), gi3c);
+ if (ret) {
+ dev_err(&pdev->dev, "Request_irq failed:%d: err:%d\n",
+ gi3c->irq, ret);
+ return ret;
+ }
+ /* Disable the interrupt so that the system can enter low-power mode */
+ disable_irq(gi3c->irq);
+
+ ret = geni_se_resources_on(&gi3c->se);
+ if (ret) {
+ dev_err(&pdev->dev, "Error turning on resources %d\n", ret);
+ return ret;
+ }
+
+ proto = geni_se_read_proto(&gi3c->se);
+ if (proto != GENI_SE_I3C) {
+ dev_err(&pdev->dev, "Invalid proto %d\n", proto);
+ geni_se_resources_off(&gi3c->se);
+ return -ENXIO;
+ }
+
+ tx_depth = geni_se_get_tx_fifo_depth(&gi3c->se);
+ gi3c->tx_wm = tx_depth - 1;
+ geni_se_init(&gi3c->se, gi3c->tx_wm, tx_depth);
+ geni_se_config_packing(&gi3c->se, BITS_PER_BYTE, PACKING_BYTES_PW,
+ true, true, true);
+ geni_se_resources_off(&gi3c->se);
+ dev_dbg(&pdev->dev, "i3c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
+
+ pm_runtime_set_suspended(gi3c->se.dev);
+ pm_runtime_set_autosuspend_delay(gi3c->se.dev, I3C_AUTO_SUSPEND_DELAY);
+ pm_runtime_use_autosuspend(gi3c->se.dev);
+ pm_runtime_enable(gi3c->se.dev);
+
+ ret = i3c_master_register(&gi3c->ctrlr, &pdev->dev,
+ &geni_i3c_master_ops, false);
+
+ if (ret)
+ return ret;
+
+ dev_err(&pdev->dev, "I3C probed\n");
+ return ret;
+}
+
+static int geni_i3c_remove(struct platform_device *pdev)
+{
+ struct geni_i3c_dev *gi3c = platform_get_drvdata(pdev);
+ int ret = 0;
+
+ pm_runtime_disable(gi3c->se.dev);
+ ret = i3c_master_unregister(&gi3c->ctrlr);
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int geni_i3c_runtime_suspend(struct device *dev)
+{
+ struct geni_i3c_dev *gi3c = dev_get_drvdata(dev);
+
+ disable_irq(gi3c->irq);
+ geni_se_resources_off(&gi3c->se);
+ return 0;
+}
+
+static int geni_i3c_runtime_resume(struct device *dev)
+{
+ int ret;
+ struct geni_i3c_dev *gi3c = dev_get_drvdata(dev);
+
+ ret = geni_se_resources_on(&gi3c->se);
+ if (ret)
+ return ret;
+
+ enable_irq(gi3c->irq);
+
+ return 0;
+}
+#else
+static int geni_i3c_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int geni_i3c_runtime_resume(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops geni_i3c_pm_ops = {
+ .runtime_suspend = geni_i3c_runtime_suspend,
+ .runtime_resume = geni_i3c_runtime_resume,
+};
+
+static const struct of_device_id geni_i3c_dt_match[] = {
+ { .compatible = "qcom,geni-i3c" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, geni_i3c_dt_match);
+
+static struct platform_driver geni_i3c_master = {
+ .probe = geni_i3c_probe,
+ .remove = geni_i3c_remove,
+ .driver = {
+ .name = "geni_i3c_master",
+ .pm = &geni_i3c_pm_ops,
+ .of_match_table = geni_i3c_dt_match,
+ },
+};
+
+module_platform_driver(geni_i3c_master);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:geni_i3c_master");
+
--
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a Linux Foundation Collaborative Project
