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- #include <linux/clk.h>
- #include <linux/delay.h>
- #include <linux/err.h>
- #include <linux/i2c.h>
- #include <linux/interrupt.h>
- #include <linux/io.h>
- #include <linux/irq.h>
- #include <linux/module.h>
- #include <linux/of.h>
- #include <linux/of_platform.h>
- #include <linux/platform_device.h>
- #include <linux/pm_runtime.h>
- #include <linux/dma-mapping.h>
- #include <linux/soc/qcom/geni-se.h>
- #include <linux/qcom-geni-se-common.h>
- #include <linux/ipc_logging.h>
- #include <linux/dmaengine.h>
- #include <linux/msm_gpi.h>
- #include <linux/ioctl.h>
- #include <linux/pinctrl/consumer.h>
- #include <linux/slab.h>
- #define SE_GENI_TEST_BUS_CTRL 0x44
- #define SE_NUM_FOR_TEST_BUS 5
- #define SE_GENI_CFG_REG68 (0x210)
- #define SE_I2C_TX_TRANS_LEN (0x26C)
- #define SE_I2C_RX_TRANS_LEN (0x270)
- #define SE_I2C_SCL_COUNTERS (0x278)
- #define SE_GENI_M_GP_LENGTH (0x910)
- #define I2C_WRITE (0x1)
- #define I2C_READ (0x2)
- #define I2C_WRITE_READ (0x3)
- #define I2C_ADDR_ONLY (0x4)
- #define I2C_BUS_CLEAR (0x6)
- #define I2C_STOP_ON_BUS (0x7)
- #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 BYPASS_ADDR_PHASE (BIT(8))
- #define SLV_ADDR_MSK (GENMASK(15, 9))
- #define SLV_ADDR_SHFT (9)
- #define I2C_PACK_EN (BIT(0) | BIT(1))
- #define GP_IRQ0 0
- #define GP_IRQ1 1
- #define GP_IRQ2 2
- #define GP_IRQ3 3
- #define GP_IRQ4 4
- #define GP_IRQ5 5
- #define GENI_OVERRUN 6
- #define GENI_ILLEGAL_CMD 7
- #define GENI_ABORT_DONE 8
- #define GENI_TIMEOUT 9
- #define GENI_HW_PARAM 0x50
- #define GENI_SPURIOUS_IRQ 10
- #define I2C_ADDR_NACK 11
- #define I2C_DATA_NACK 12
- #define GENI_M_CMD_FAILURE 13
- #define GSI_TRE_FULL 14
- #define I2C_NACK GP_IRQ1
- #define I2C_BUS_PROTO GP_IRQ3
- #define I2C_ARB_LOST GP_IRQ4
- #define DM_I2C_CB_ERR ((BIT(GP_IRQ1) | BIT(GP_IRQ3) | BIT(GP_IRQ4)) \
- << 5)
- #define I2C_MASTER_HUB (BIT(0))
- #define KHz(freq) (1000 * freq)
- #define I2C_AUTO_SUSPEND_DELAY 250
- #define I2C_TIMEOUT_SAFETY_COEFFICIENT 10
- #define I2C_TIMEOUT_MIN_USEC 500000
- #define MAX_SE 20
- #define I2C_LOG_DBG(log_ctx, print, dev, x...) do { \
- GENI_SE_DBG(log_ctx, print, dev, x); \
- if (dev) \
- i2c_trace_log(dev, x); \
- } while (0)
- #define I2C_LOG_ERR(log_ctx, print, dev, x...) do { \
- GENI_SE_ERR(log_ctx, print, dev, x); \
- if (dev) \
- i2c_trace_log(dev, x); \
- } while (0)
- #define CREATE_TRACE_POINTS
- #include "i2c-qup-trace.h"
- #define I2C_HUB_DEF 0
- #define MAX_NUM_TRE_MSGS 448
- #define NUM_TRE_MSGS_PER_INTR 64
- #define IMMEDIATE_DMA_LEN 8
- void i2c_trace_log(struct device *dev, const char *fmt, ...)
- {
- struct va_format vaf = {
- .fmt = fmt,
- };
- va_list args;
- va_start(args, fmt);
- vaf.va = &args;
- trace_i2c_log_info(dev_name(dev), &vaf);
- va_end(args);
- }
- enum i2c_se_mode {
- UNINITIALIZED,
- FIFO_SE_DMA,
- GSI_ONLY,
- };
- struct dbg_buf_ctxt {
- void *virt_buf;
- void *map_buf;
- };
- struct gsi_i2c_tre_queue {
- u32 msg_cnt;
- u32 tre_freed_cnt;
- bool is_multi_descriptor;
- atomic_t irq_cnt;
- u32 unmap_cnt;
- u8 *dma_buf[MAX_NUM_TRE_MSGS];
- };
- struct geni_i2c_dev {
- struct device *dev;
- void __iomem *base;
- unsigned int tx_wm;
- int irq;
- int err;
- u32 xfer_timeout;
- struct i2c_adapter adap;
- struct completion xfer;
- struct completion m_cancel_cmd;
- struct i2c_msg *cur;
- struct i2c_msg *msgs;
- struct gsi_i2c_tre_queue gsi_tx;
- struct geni_se i2c_rsc;
- struct clk *m_ahb_clk;
- struct clk *s_ahb_clk;
- struct clk *core_clk;
- int cur_wr;
- int cur_rd;
- struct device *wrapper_dev;
- void *ipcl;
- void *ipc_log_kpi;
- int i2c_kpi;
- int clk_fld_idx;
- struct dma_chan *tx_c;
- struct dma_chan *rx_c;
- struct msm_gpi_tre lock_t;
- struct msm_gpi_tre unlock_t;
- struct msm_gpi_tre cfg0_t;
- struct msm_gpi_tre go_t;
- struct msm_gpi_tre tx_t;
- struct msm_gpi_tre rx_t;
- dma_addr_t tx_ph[MAX_NUM_TRE_MSGS];
- dma_addr_t rx_ph;
- struct msm_gpi_ctrl tx_ev;
- struct msm_gpi_ctrl rx_ev;
- struct scatterlist *tx_sg;
- struct scatterlist *rx_sg;
- dma_addr_t tx_sg_dma;
- dma_addr_t rx_sg_dma;
- int cfg_sent;
- int clk_freq_out;
- struct dma_async_tx_descriptor *tx_desc;
- struct dma_async_tx_descriptor *rx_desc;
- struct msm_gpi_dma_async_tx_cb_param tx_cb;
- struct msm_gpi_dma_async_tx_cb_param rx_cb;
- enum i2c_se_mode se_mode;
- bool cmd_done;
- bool is_shared;
- bool is_high_perf;
- u32 dbg_num;
- struct dbg_buf_ctxt *dbg_buf_ptr;
- bool is_le_vm;
- bool pm_ctrl_client;
- bool req_chan;
- bool first_xfer_done;
- bool le_gpi_reset_done;
- bool is_i2c_hub;
- bool prev_cancel_pending;
- bool gsi_err;
- bool is_i2c_rtl_based;
- bool skip_bw_vote;
- atomic_t is_xfer_in_progress;
- bool bus_recovery_enable;
- bool i2c_test_dev;
- };
- static struct geni_i2c_dev *gi2c_dev_dbg[MAX_SE];
- static int arr_idx;
- static int geni_i2c_runtime_suspend(struct device *dev);
- struct geni_i2c_err_log {
- int err;
- const char *msg;
- };
- static struct geni_i2c_err_log gi2c_log[] = {
- [GP_IRQ0] = {-EINVAL, "Unknown I2C err GP_IRQ0"},
- [I2C_ADDR_NACK] = {-ENOTCONN,
- "Address NACK: slv unresponsive, check its power/reset-ln"},
- [I2C_DATA_NACK] = {-ENOTCONN,
- "Data NACK: Device NACK before end of TX transfer"},
- [GP_IRQ2] = {-EINVAL, "Unknown I2C err GP IRQ2"},
- [I2C_BUS_PROTO] = {-EPROTO,
- "Bus proto err, noisy/unepxected start/stop"},
- [I2C_ARB_LOST] = {-EBUSY,
- "Bus arbitration lost, clock line undriveable"},
- [GP_IRQ5] = {-EINVAL, "Unknown I2C err GP IRQ5"},
- [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, "I2C TXN timed out"},
- [GENI_SPURIOUS_IRQ] = {-EINVAL, "Received unexpected interrupt"},
- [GENI_M_CMD_FAILURE] = {-EINVAL, "Master command failure"},
- [GSI_TRE_FULL] = {-EINVAL, "GSI TRE FULL NO SPACE"},
- };
- struct geni_i2c_clk_fld {
- u32 clk_freq_out;
- u8 clk_div;
- u8 t_high;
- u8 t_low;
- u8 t_cycle;
- };
- static struct geni_i2c_clk_fld geni_i2c_clk_map[] = {
- {KHz(100), 7, 10, 11, 26},
- {KHz(400), 2, 7, 10, 24},
- {KHz(1000), 1, 2, 8, 18},
- };
- static struct geni_i2c_clk_fld geni_i2c_hub_clk_map[] = {
- {KHz(100), 7, 10, 11, 26},
- {KHz(400), 2, 7, 10, 24},
- {KHz(1000), 1, 3, 9, 18},
- };
- static int geni_i2c_clk_map_idx(struct geni_i2c_dev *gi2c)
- {
- int i;
- int ret = 0;
- bool clk_map_present = false;
- struct geni_i2c_clk_fld *itr;
- itr = (gi2c->is_i2c_rtl_based) ? geni_i2c_hub_clk_map : geni_i2c_clk_map;
- for (i = 0; i < ARRAY_SIZE(geni_i2c_clk_map); i++, itr++) {
- if (itr->clk_freq_out == gi2c->clk_freq_out) {
- clk_map_present = true;
- break;
- }
- }
- if (clk_map_present)
- gi2c->clk_fld_idx = i;
- else
- ret = -EINVAL;
- return ret;
- }
- void geni_i2c_se_dump_dbg_regs(struct geni_se *se, void __iomem *base,
- void *ipc)
- {
- u32 m_cmd0 = 0;
- u32 m_irq_status = 0;
- u32 s_cmd0 = 0;
- u32 s_irq_status = 0;
- u32 geni_status = 0;
- u32 geni_ios = 0;
- u32 dma_rx_irq = 0;
- u32 dma_tx_irq = 0;
- u32 rx_fifo_status = 0;
- u32 tx_fifo_status = 0;
- u32 se_dma_dbg = 0;
- u32 m_cmd_ctrl = 0;
- u32 se_dma_rx_len = 0;
- u32 se_dma_rx_len_in = 0;
- u32 se_dma_tx_len = 0;
- u32 se_dma_tx_len_in = 0;
- u32 geni_m_irq_en = 0;
- u32 geni_s_irq_en = 0;
- u32 geni_dma_tx_irq_en = 0;
- u32 geni_dma_rx_irq_en = 0;
- m_cmd0 = geni_read_reg(base, SE_GENI_M_CMD0);
- m_irq_status = geni_read_reg(base, SE_GENI_M_IRQ_STATUS);
- s_cmd0 = geni_read_reg(base, SE_GENI_S_CMD0);
- s_irq_status = geni_read_reg(base, SE_GENI_S_IRQ_STATUS);
- geni_status = geni_read_reg(base, SE_GENI_STATUS);
- geni_ios = geni_read_reg(base, SE_GENI_IOS);
- dma_tx_irq = geni_read_reg(base, SE_DMA_TX_IRQ_STAT);
- dma_rx_irq = geni_read_reg(base, SE_DMA_RX_IRQ_STAT);
- rx_fifo_status = geni_read_reg(base, SE_GENI_RX_FIFO_STATUS);
- tx_fifo_status = geni_read_reg(base, SE_GENI_TX_FIFO_STATUS);
- se_dma_dbg = geni_read_reg(base, SE_DMA_DEBUG_REG0);
- m_cmd_ctrl = geni_read_reg(base, SE_GENI_M_CMD_CTRL_REG);
- se_dma_rx_len = geni_read_reg(base, SE_DMA_RX_LEN);
- se_dma_rx_len_in = geni_read_reg(base, SE_DMA_RX_LEN_IN);
- se_dma_tx_len = geni_read_reg(base, SE_DMA_TX_LEN);
- se_dma_tx_len_in = geni_read_reg(base, SE_DMA_TX_LEN_IN);
- geni_m_irq_en = geni_read_reg(base, SE_GENI_M_IRQ_EN);
- geni_s_irq_en = geni_read_reg(base, SE_GENI_S_IRQ_EN);
- geni_dma_tx_irq_en = geni_read_reg(base, SE_DMA_TX_IRQ_EN);
- geni_dma_rx_irq_en = geni_read_reg(base, SE_DMA_RX_IRQ_EN);
- I2C_LOG_DBG(ipc, false, se->dev,
- "%s: m_cmd0:0x%x, m_irq_status:0x%x, geni_status:0x%x, geni_ios:0x%x\n",
- __func__, m_cmd0, m_irq_status, geni_status, geni_ios);
- I2C_LOG_DBG(ipc, false, se->dev,
- "dma_rx_irq:0x%x, dma_tx_irq:0x%x, rx_fifo_sts:0x%x, tx_fifo_sts:0x%x\n",
- dma_rx_irq, dma_tx_irq, rx_fifo_status, tx_fifo_status);
- I2C_LOG_DBG(ipc, false, se->dev,
- "se_dma_dbg:0x%x, m_cmd_ctrl:0x%x, dma_rxlen:0x%x, dma_rxlen_in:0x%x\n",
- se_dma_dbg, m_cmd_ctrl, se_dma_rx_len, se_dma_rx_len_in);
- I2C_LOG_DBG(ipc, false, se->dev,
- "dma_txlen:0x%x, dma_txlen_in:0x%x s_irq_status:0x%x\n",
- se_dma_tx_len, se_dma_tx_len_in, s_irq_status);
- I2C_LOG_DBG(ipc, false, se->dev,
- "dma_txirq_en:0x%x, dma_rxirq_en:0x%x geni_m_irq_en:0x%x geni_s_irq_en:0x%x\n",
- geni_dma_tx_irq_en, geni_dma_rx_irq_en, geni_m_irq_en,
- geni_s_irq_en);
- }
- static ssize_t capture_kpi_show(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct platform_device *pdev = to_platform_device(dev);
- struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
- if (!gi2c)
- return -EINVAL;
- return scnprintf(buf, sizeof(int), "%d\n", gi2c->i2c_kpi);
- }
- static ssize_t capture_kpi_store(struct device *dev,
- struct device_attribute *attr, const char *buf,
- size_t size)
- {
- struct platform_device *pdev = to_platform_device(dev);
- struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
- char name[36];
- if (!gi2c)
- return -EINVAL;
- if (kstrtoint(buf, 0, &gi2c->i2c_kpi)) {
- dev_err(dev, "Invalid input\n");
- return -EINVAL;
- }
-
- if (gi2c->i2c_kpi && !gi2c->ipc_log_kpi) {
- memset(name, 0, sizeof(name));
- scnprintf(name, sizeof(name), "%s%s", dev_name(gi2c->dev), "_kpi");
- gi2c->ipc_log_kpi = ipc_log_context_create(IPC_LOG_KPI_PAGES, name, 0);
- if (!gi2c->ipc_log_kpi && IS_ENABLED(CONFIG_IPC_LOGGING))
- dev_err(&pdev->dev, "Error creating kpi IPC logs\n");
- }
- return size;
- }
- static DEVICE_ATTR_RW(capture_kpi);
- static inline void qcom_geni_i2c_conf(struct geni_i2c_dev *gi2c, int dfs)
- {
- struct geni_i2c_clk_fld *itr;
- if (gi2c->is_i2c_rtl_based)
- itr = geni_i2c_hub_clk_map + gi2c->clk_fld_idx;
- else
- itr = geni_i2c_clk_map + gi2c->clk_fld_idx;
-
- if (!gi2c->is_i2c_hub)
- geni_write_reg(dfs, gi2c->base, SE_GENI_CLK_SEL);
- geni_write_reg((itr->clk_div << 4) | 1, gi2c->base, GENI_SER_M_CLK_CFG);
- geni_write_reg(((itr->t_high << 20) | (itr->t_low << 10) |
- itr->t_cycle), gi2c->base, SE_I2C_SCL_COUNTERS);
-
- mb();
- }
- static inline void qcom_geni_i2c_calc_timeout(struct geni_i2c_dev *gi2c)
- {
- struct geni_i2c_clk_fld *clk_itr;
- size_t bit_cnt = gi2c->cur->len*9;
- size_t bit_usec = 0;
- size_t xfer_max_usec = 0;
- if (gi2c->is_i2c_rtl_based)
- clk_itr = geni_i2c_hub_clk_map + gi2c->clk_fld_idx;
- else
- clk_itr = geni_i2c_clk_map + gi2c->clk_fld_idx;
- bit_usec = (bit_cnt * USEC_PER_SEC) / clk_itr->clk_freq_out;
- xfer_max_usec = (bit_usec * I2C_TIMEOUT_SAFETY_COEFFICIENT) +
- I2C_TIMEOUT_MIN_USEC;
- gi2c->xfer_timeout = usecs_to_jiffies(xfer_max_usec);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: us:%d jiffies:%d\n",
- __func__, xfer_max_usec, gi2c->xfer_timeout);
- }
- static void geni_se_select_test_bus(struct geni_i2c_dev *gi2c, u8 test_bus_num)
- {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: test_bus:%d\n", __func__, test_bus_num);
- writel_relaxed(test_bus_num, gi2c->base + SE_GENI_TEST_BUS_CTRL);
- }
- static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err)
- {
- if (err == I2C_DATA_NACK || err == I2C_ADDR_NACK
- || err == GENI_ABORT_DONE) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s\n",
- gi2c_log[err].msg);
- goto err_ret;
- } else {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev, "%s\n",
- gi2c_log[err].msg);
- }
- geni_i2c_se_dump_dbg_regs(&gi2c->i2c_rsc, gi2c->base, gi2c->ipcl);
- err_ret:
- gi2c->err = gi2c_log[err].err;
- }
- static void geni_i2c_test_bus_dump(struct geni_i2c_dev *gi2c, u8 se_num)
- {
-
-
- geni_se_select_test_bus(gi2c, 8);
- test_bus_select_per_qupv3(gi2c->wrapper_dev, se_num, gi2c->ipcl);
- test_bus_read_per_qupv3(gi2c->wrapper_dev, gi2c->ipcl);
-
- geni_se_select_test_bus(gi2c, 5);
- test_bus_select_per_qupv3(gi2c->wrapper_dev, se_num, gi2c->ipcl);
- test_bus_read_per_qupv3(gi2c->wrapper_dev, gi2c->ipcl);
-
- }
- static void do_reg68_war_for_rtl_se(struct geni_i2c_dev *gi2c)
- {
- u32 status;
-
- status = geni_read_reg(gi2c->base, SE_GENI_M_CMD0);
- GENI_SE_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: SE_GENI_M_CMD0:0x%x\n", __func__, status);
-
- if ((status & 0x4) && gi2c->is_i2c_rtl_based) {
- status = geni_read_reg(gi2c->base, SE_GENI_CFG_REG68);
- GENI_SE_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: Before WAR REG68:0x%x\n", __func__, status);
- if (status & 0x20) {
-
- geni_write_reg(0x00100110, gi2c->base,
- SE_GENI_CFG_REG68);
- } else {
-
- geni_write_reg(0x00100120, gi2c->base,
- SE_GENI_CFG_REG68);
- }
- status = geni_read_reg(gi2c->base, SE_GENI_CFG_REG68);
- GENI_SE_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: After WAR REG68:0x%x\n", __func__, status);
- }
- }
- static int geni_i2c_stop_with_cancel(struct geni_i2c_dev *gi2c)
- {
- int timeout = 0;
-
- if (gi2c->i2c_test_dev)
-
- geni_i2c_test_bus_dump(gi2c, SE_NUM_FOR_TEST_BUS);
- reinit_completion(&gi2c->m_cancel_cmd);
- geni_se_cancel_m_cmd(&gi2c->i2c_rsc);
- timeout = wait_for_completion_timeout(&gi2c->m_cancel_cmd, HZ);
- if (!timeout) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s:Cancel failed\n", __func__);
- reinit_completion(&gi2c->xfer);
- geni_se_abort_m_cmd(&gi2c->i2c_rsc);
- timeout = wait_for_completion_timeout(&gi2c->xfer, HZ);
- if (!timeout) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s:Abort failed\n", __func__);
- return !timeout;
- }
- }
- return 0;
- }
- static bool geni_i2c_is_bus_recovery_required(struct geni_i2c_dev *gi2c)
- {
- u32 geni_ios = readl_relaxed(gi2c->base + SE_GENI_IOS);
-
- return (((geni_ios & 1) == 0) && (gi2c->err == -EPROTO ||
- gi2c->err == -EBUSY ||
- gi2c->err == -ETIMEDOUT));
- }
- static int geni_i2c_bus_recovery(struct geni_i2c_dev *gi2c)
- {
- int timeout = 0, ret = 0;
- u32 m_param = 0, m_cmd = 0;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
-
- if (gi2c->bus_recovery_enable &&
- geni_i2c_is_bus_recovery_required(gi2c)) {
- GENI_SE_ERR(gi2c->ipcl, false, gi2c->dev,
- "%d:SDA Line stuck\n", gi2c->err);
- } else {
- GENI_SE_DBG(gi2c->ipcl, false, gi2c->dev,
- "Bus Recovery not required/enabled\n");
- return 0;
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s: start recovery\n",
- __func__);
-
- reinit_completion(&gi2c->xfer);
- m_cmd = I2C_BUS_CLEAR;
- geni_se_setup_m_cmd(&gi2c->i2c_rsc, m_cmd, m_param);
- timeout = wait_for_completion_timeout(&gi2c->xfer, HZ);
- if (!timeout) {
- geni_i2c_err(gi2c, GENI_TIMEOUT);
- gi2c->cur = NULL;
- ret = geni_i2c_stop_with_cancel(gi2c);
- if (ret) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s: Bus clear Failed\n", __func__);
- return ret;
- }
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: BUS_CLEAR success\n", __func__);
-
- reinit_completion(&gi2c->xfer);
- m_cmd = I2C_STOP_ON_BUS;
- geni_se_setup_m_cmd(&gi2c->i2c_rsc, m_cmd, m_param);
- timeout = wait_for_completion_timeout(&gi2c->xfer, HZ);
- if (!timeout) {
- geni_i2c_err(gi2c, GENI_TIMEOUT);
- gi2c->cur = NULL;
- ret = geni_i2c_stop_with_cancel(gi2c);
- if (ret) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s:Bus Stop Failed\n", __func__);
- return ret;
- }
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: success\n", __func__);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- return 0;
- }
- static int do_pending_cancel(struct geni_i2c_dev *gi2c)
- {
- int timeout = 0;
- u32 geni_ios = 0;
-
- if (!gi2c->is_i2c_rtl_based)
- return 0;
- geni_ios = geni_read_reg(gi2c->base, SE_GENI_IOS);
- if ((geni_ios & 0x3) != 0x3) {
-
- GENI_SE_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: IOS:0x%x, bad state\n", __func__, geni_ios);
- geni_write_reg(FORCE_DEFAULT,
- gi2c->base, GENI_FORCE_DEFAULT_REG);
- geni_ios = geni_read_reg(gi2c->base, SE_GENI_IOS);
- if ((geni_ios & 0x3) != 0x3) {
- GENI_SE_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: IOS:0x%x, Fix from Slave side\n",
- __func__, geni_ios);
- return -EINVAL;
- }
- GENI_SE_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: IOS:0x%x restored properly\n", __func__, geni_ios);
- }
- if (gi2c->se_mode == GSI_ONLY) {
- dmaengine_terminate_all(gi2c->tx_c);
- gi2c->cfg_sent = 0;
- } else if (geni_i2c_stop_with_cancel(gi2c)) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: geni_i2c_stop_with_cancel failed\n", __func__);
- }
- gi2c->prev_cancel_pending = false;
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s: Pending Cancel done\n", __func__);
- return timeout;
- }
- static int geni_i2c_prepare(struct geni_i2c_dev *gi2c)
- {
- if (gi2c->se_mode == UNINITIALIZED) {
- int proto = geni_se_read_proto(&gi2c->i2c_rsc);
- u32 se_mode, geni_se_hw_param_2;
- if (proto != GENI_SE_I2C) {
- dev_err(gi2c->dev, "Invalid proto %d\n", proto);
- if (!gi2c->is_le_vm) {
- geni_se_resources_off(&gi2c->i2c_rsc);
- geni_icc_disable(&gi2c->i2c_rsc);
- if (gi2c->is_i2c_hub)
- clk_disable_unprepare(gi2c->core_clk);
- }
- return -ENXIO;
- }
- se_mode = readl_relaxed(gi2c->base +
- GENI_IF_DISABLE_RO);
- if (se_mode) {
- gi2c->se_mode = GSI_ONLY;
- geni_se_select_mode(&gi2c->i2c_rsc, GENI_GPI_DMA);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "i2c in GSI ONLY mode\n");
- } else {
- int gi2c_tx_depth;
- if (!gi2c->is_i2c_hub)
- gi2c_tx_depth = geni_se_get_tx_fifo_depth(&gi2c->i2c_rsc);
- else
- gi2c_tx_depth = 16;
- gi2c->se_mode = FIFO_SE_DMA;
- gi2c->tx_wm = gi2c_tx_depth - 1;
- geni_se_init(&gi2c->i2c_rsc, gi2c->tx_wm, gi2c_tx_depth);
- qcom_geni_i2c_conf(gi2c, 0);
- geni_se_config_packing(&gi2c->i2c_rsc, 8, 4, true, true, true);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "i2c fifo/se-dma mode. fifo depth:%d\n",
- gi2c_tx_depth);
- }
- if (!gi2c->is_i2c_hub) {
-
- geni_se_hw_param_2 = readl_relaxed(gi2c->base + SE_HW_PARAM_2);
- if (geni_se_hw_param_2 & GEN_HW_FSM_I2C) {
- gi2c->is_i2c_rtl_based = true;
- dev_info(gi2c->dev, "%s: RTL based SE\n", __func__);
- }
- }
- if (gi2c->pm_ctrl_client)
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: pm_runtime_get_sync bypassed\n", __func__);
- }
- return 0;
- }
- static void geni_i2c_irq_handle_watermark(struct geni_i2c_dev *gi2c, u32 m_stat)
- {
- struct i2c_msg *cur = gi2c->cur;
- int i, j;
- u32 rx_st = readl_relaxed(gi2c->base + SE_GENI_RX_FIFO_STATUS);
- if (!cur) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s: Spurious irq\n", __func__);
- geni_i2c_err(gi2c, GENI_SPURIOUS_IRQ);
- return;
- }
- if (((m_stat & M_RX_FIFO_WATERMARK_EN) ||
- (m_stat & M_RX_FIFO_LAST_EN)) && (cur->flags & I2C_M_RD)) {
- u32 rxcnt = rx_st & RX_FIFO_WC_MSK;
- for (j = 0; j < rxcnt; j++) {
- u32 temp;
- int p;
- temp = readl_relaxed(gi2c->base + SE_GENI_RX_FIFOn);
- for (i = gi2c->cur_rd, p = 0; (i < cur->len && p < 4);
- i++, p++)
- cur->buf[i] = (u8) ((temp >> (p * 8)) & 0xff);
- gi2c->cur_rd = i;
- if (gi2c->cur_rd == cur->len) {
- dev_dbg(gi2c->dev, "FIFO i:%d,read 0x%x\n",
- i, temp);
- break;
- }
- }
- } else if ((m_stat & M_TX_FIFO_WATERMARK_EN) &&
- !(cur->flags & I2C_M_RD)) {
- for (j = 0; j < gi2c->tx_wm; j++) {
- u32 temp = 0;
- int p;
- for (i = gi2c->cur_wr, p = 0; (i < cur->len && p < 4);
- i++, p++)
- temp |= (((u32)(cur->buf[i]) << (p * 8)));
- writel_relaxed(temp, gi2c->base + SE_GENI_TX_FIFOn);
- gi2c->cur_wr = i;
- dev_dbg(gi2c->dev, "FIFO i:%d,wrote 0x%x\n", i, temp);
- if (gi2c->cur_wr == cur->len) {
- dev_dbg(gi2c->dev, "FIFO i2c bytes done writing\n");
- writel_relaxed(0, (gi2c->base + SE_GENI_TX_WATERMARK_REG));
- break;
- }
- }
- } else {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: m_irq_status:0x%x cur->flags:%d\n", __func__, m_stat, cur->flags);
- }
- }
- static void geni_i2c_check_addr_data_nack(struct geni_i2c_dev *gi2c, __u16 flags)
- {
- if (readl_relaxed(gi2c->base + SE_GENI_M_GP_LENGTH)) {
-
- if (!(flags & I2C_M_RD))
- geni_i2c_err(gi2c, I2C_DATA_NACK);
- } else {
- geni_i2c_err(gi2c, I2C_ADDR_NACK);
- }
- }
- static irqreturn_t geni_i2c_irq(int irq, void *dev)
- {
- struct geni_i2c_dev *gi2c = dev;
- bool is_clear_watermark = false;
- bool m_cancel_done = false;
- u32 m_stat = readl_relaxed(gi2c->base + SE_GENI_M_IRQ_STATUS);
- u32 dm_tx_st = readl_relaxed(gi2c->base + SE_DMA_TX_IRQ_STAT);
- u32 dm_rx_st = readl_relaxed(gi2c->base + SE_DMA_RX_IRQ_STAT);
- u32 dma = readl_relaxed(gi2c->base + SE_GENI_DMA_MODE_EN);
- struct i2c_msg *cur = gi2c->cur;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: m_irq_status:0x%x\n", __func__, m_stat);
- if (!cur) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "Spurious irq\n");
- geni_i2c_err(gi2c, GENI_SPURIOUS_IRQ);
- gi2c->cmd_done = true;
- is_clear_watermark = true;
- goto irqret;
- }
- if ((m_stat & M_CMD_FAILURE_EN) ||
- (dm_rx_st & (DM_I2C_CB_ERR)) ||
- (m_stat & M_CMD_CANCEL_EN) ||
- (m_stat & M_CMD_ABORT_EN) ||
- (m_stat & M_GP_IRQ_1_EN) ||
- (m_stat & M_GP_IRQ_3_EN) ||
- (m_stat & M_GP_IRQ_4_EN)) {
- if (m_stat & M_GP_IRQ_1_EN)
- geni_i2c_check_addr_data_nack(gi2c, gi2c->cur->flags);
- if (m_stat & M_GP_IRQ_3_EN)
- geni_i2c_err(gi2c, I2C_BUS_PROTO);
- if (m_stat & M_GP_IRQ_4_EN)
- geni_i2c_err(gi2c, I2C_ARB_LOST);
- if (m_stat & M_CMD_OVERRUN_EN)
- geni_i2c_err(gi2c, GENI_OVERRUN);
- if (m_stat & M_ILLEGAL_CMD_EN)
- geni_i2c_err(gi2c, GENI_ILLEGAL_CMD);
- if (m_stat & M_CMD_ABORT_EN)
- geni_i2c_err(gi2c, GENI_ABORT_DONE);
-
- if (m_stat & M_CMD_FAILURE_EN) {
-
- if (!gi2c->err)
- geni_i2c_err(gi2c, GENI_M_CMD_FAILURE);
- else
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s:GENI_M_CMD_FAILURE\n", __func__);
- }
-
- if (m_stat & M_CMD_CANCEL_EN)
- m_cancel_done = true;
- gi2c->cmd_done = true;
- is_clear_watermark = true;
- goto irqret;
- }
- geni_i2c_irq_handle_watermark(gi2c, m_stat);
- irqret:
- if (!dma && is_clear_watermark)
- writel_relaxed(0, (gi2c->base + SE_GENI_TX_WATERMARK_REG));
- if (m_stat)
- writel_relaxed(m_stat, gi2c->base + SE_GENI_M_IRQ_CLEAR);
- if (dma) {
- if (dm_tx_st)
- writel_relaxed(dm_tx_st, gi2c->base +
- SE_DMA_TX_IRQ_CLR);
- if (dm_rx_st)
- writel_relaxed(dm_rx_st, gi2c->base +
- SE_DMA_RX_IRQ_CLR);
-
- wmb();
- if ((dm_tx_st & TX_DMA_DONE) || (dm_rx_st & RX_DMA_DONE))
- gi2c->cmd_done = true;
- } else if (m_stat & M_CMD_DONE_EN) {
- gi2c->cmd_done = true;
- }
- if (gi2c->cmd_done) {
- gi2c->cmd_done = false;
- complete(&gi2c->xfer);
- }
- if (m_cancel_done)
- complete(&gi2c->m_cancel_cmd);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, gi2c->clk_freq_out);
- return IRQ_HANDLED;
- }
- static void gi2c_ev_cb(struct dma_chan *ch, struct msm_gpi_cb const *cb_str,
- void *ptr)
- {
- struct geni_i2c_dev *gi2c = ptr;
- u32 m_stat = cb_str->status;
- switch (cb_str->cb_event) {
- case MSM_GPI_QUP_ERROR:
- case MSM_GPI_QUP_SW_ERROR:
- case MSM_GPI_QUP_MAX_EVENT:
- case MSM_GPI_QUP_FW_ERROR:
- case MSM_GPI_QUP_PENDING_EVENT:
- case MSM_GPI_QUP_EOT_DESC_MISMATCH:
- break;
- case MSM_GPI_QUP_NOTIFY:
- case MSM_GPI_QUP_CH_ERROR:
- if (m_stat & M_GP_IRQ_1_EN)
- geni_i2c_check_addr_data_nack(gi2c, gi2c->cur->flags);
- if (m_stat & M_GP_IRQ_3_EN)
- geni_i2c_err(gi2c, I2C_BUS_PROTO);
- if (m_stat & M_GP_IRQ_4_EN)
- geni_i2c_err(gi2c, I2C_ARB_LOST);
- complete(&gi2c->xfer);
- break;
- default:
- break;
- }
- if (cb_str->cb_event != MSM_GPI_QUP_NOTIFY) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "GSI QN err:0x%x, status:0x%x, err:%d\n",
- cb_str->error_log.error_code,
- m_stat, cb_str->cb_event);
- gi2c->gsi_err = true;
- complete(&gi2c->xfer);
- }
- }
- static void gi2c_gsi_cb_err(struct msm_gpi_dma_async_tx_cb_param *cb,
- char *xfer)
- {
- struct geni_i2c_dev *gi2c = cb->userdata;
- if (cb->status & DM_I2C_CB_ERR) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s TCE Unexpected Err, stat:0x%x\n",
- xfer, cb->status);
- if (cb->status & (BIT(GP_IRQ1) << 5))
- geni_i2c_check_addr_data_nack(gi2c, gi2c->cur->flags);
- if (cb->status & (BIT(GP_IRQ3) << 5))
- geni_i2c_err(gi2c, I2C_BUS_PROTO);
- if (cb->status & (BIT(GP_IRQ4) << 5))
- geni_i2c_err(gi2c, I2C_ARB_LOST);
- }
- }
- void gi2c_gsi_tx_unmap(struct geni_i2c_dev *gi2c, u32 msg_idx, u32 wr_idx)
- {
- if (gi2c->msgs[msg_idx].len > IMMEDIATE_DMA_LEN) {
- geni_se_common_iommu_unmap_buf(gi2c->wrapper_dev, &gi2c->tx_ph[wr_idx],
- gi2c->msgs[msg_idx].len, DMA_TO_DEVICE);
- i2c_put_dma_safe_msg_buf(gi2c->gsi_tx.dma_buf[wr_idx],
- &gi2c->msgs[msg_idx], !gi2c->err);
- }
- }
- static void gi2c_gsi_tre_process(struct geni_i2c_dev *gi2c, int num)
- {
- u32 msg_xfer_cnt;
- int wr_idx = 0;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
-
- if (gi2c->err)
- msg_xfer_cnt = gi2c->gsi_tx.msg_cnt;
- else
- msg_xfer_cnt = atomic_read(&gi2c->gsi_tx.irq_cnt) * NUM_TRE_MSGS_PER_INTR;
- for (; gi2c->gsi_tx.unmap_cnt < msg_xfer_cnt; gi2c->gsi_tx.unmap_cnt++) {
- if (gi2c->gsi_tx.unmap_cnt == num) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s:last %d msg unmapped\n", __func__, num);
- break;
- }
- gi2c->gsi_tx.tre_freed_cnt++;
- if (gi2c->msgs[gi2c->gsi_tx.unmap_cnt].len > IMMEDIATE_DMA_LEN) {
- wr_idx = gi2c->gsi_tx.unmap_cnt % MAX_NUM_TRE_MSGS;
- gi2c_gsi_tx_unmap(gi2c, gi2c->gsi_tx.unmap_cnt, wr_idx);
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s:unmap_cnt %d freed_cnt:%d wr_idx:%d\n",
- __func__, gi2c->gsi_tx.unmap_cnt, gi2c->gsi_tx.tre_freed_cnt, wr_idx);
- }
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- }
- static void gi2c_gsi_tx_cb(void *ptr)
- {
- struct msm_gpi_dma_async_tx_cb_param *tx_cb = ptr;
- struct geni_i2c_dev *gi2c;
- if (!(tx_cb && tx_cb->userdata)) {
- pr_err("%s: Invalid tx_cb buffer\n", __func__);
- return;
- }
- gi2c = tx_cb->userdata;
- gi2c_gsi_cb_err(tx_cb, "TX");
- atomic_inc(&gi2c->gsi_tx.irq_cnt);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s:tx_cnt:%d gsi_err:%d gi2c_err:%d irq_cnt:%d\n",
- __func__, gi2c->gsi_tx.msg_cnt, gi2c->gsi_err, gi2c->err,
- atomic_read(&gi2c->gsi_tx.irq_cnt));
- complete_all(&gi2c->xfer);
- }
- static void gi2c_gsi_rx_cb(void *ptr)
- {
- struct msm_gpi_dma_async_tx_cb_param *rx_cb = ptr;
- struct geni_i2c_dev *gi2c;
- if (!(rx_cb && rx_cb->userdata)) {
- pr_err("%s: Invalid rx_cb buffer\n", __func__);
- return;
- }
- gi2c = rx_cb->userdata;
- if (!gi2c->cur) {
- geni_i2c_err(gi2c, GENI_SPURIOUS_IRQ);
- complete(&gi2c->xfer);
- return;
- }
- if (gi2c->cur->flags & I2C_M_RD) {
- gi2c_gsi_cb_err(rx_cb, "RX");
- complete(&gi2c->xfer);
- }
- }
- static int geni_i2c_gsi_request_channel(struct geni_i2c_dev *gi2c)
- {
- int ret = 0;
- if (!gi2c->tx_c) {
- gi2c->tx_c = dma_request_slave_channel(gi2c->dev, "tx");
- if (!gi2c->tx_c) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "tx dma req slv chan ret :%d\n", ret);
- return -EIO;
- }
- }
- if (!gi2c->rx_c) {
- gi2c->rx_c = dma_request_slave_channel(gi2c->dev, "rx");
- if (!gi2c->rx_c) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "rx dma req slv chan ret :%d\n", ret);
- dma_release_channel(gi2c->tx_c);
- return -EIO;
- }
- }
- gi2c->tx_ev.init.callback = gi2c_ev_cb;
- gi2c->tx_ev.init.cb_param = gi2c;
- gi2c->tx_ev.cmd = MSM_GPI_INIT;
- gi2c->tx_c->private = &gi2c->tx_ev;
- ret = dmaengine_slave_config(gi2c->tx_c, NULL);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "tx dma slave config ret :%d\n", ret);
- goto dmaengine_slave_config_fail;
- }
- gi2c->rx_ev.init.cb_param = gi2c;
- gi2c->rx_ev.init.callback = gi2c_ev_cb;
- gi2c->rx_ev.cmd = MSM_GPI_INIT;
- gi2c->rx_c->private = &gi2c->rx_ev;
- ret = dmaengine_slave_config(gi2c->rx_c, NULL);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "rx dma slave config ret :%d\n", ret);
- goto dmaengine_slave_config_fail;
- }
- gi2c->tx_cb.userdata = gi2c;
- gi2c->rx_cb.userdata = gi2c;
- gi2c->req_chan = true;
- return ret;
- dmaengine_slave_config_fail:
- dma_release_channel(gi2c->tx_c);
- dma_release_channel(gi2c->rx_c);
- gi2c->tx_c = NULL;
- gi2c->rx_c = NULL;
- return ret;
- }
- static struct msm_gpi_tre *setup_lock_tre(struct geni_i2c_dev *gi2c)
- {
- struct msm_gpi_tre *lock_t = &gi2c->lock_t;
-
- lock_t->dword[0] = MSM_GPI_LOCK_TRE_DWORD0;
- lock_t->dword[1] = MSM_GPI_LOCK_TRE_DWORD1;
- lock_t->dword[2] = MSM_GPI_LOCK_TRE_DWORD2;
-
- if (gi2c->is_shared)
- lock_t->dword[3] = MSM_GPI_LOCK_TRE_DWORD3(0, 0, 0, 0, 1);
- else if (gi2c->is_le_vm)
- lock_t->dword[3] = MSM_GPI_LOCK_TRE_DWORD3(0, 0, 0, 1, 0);
- return lock_t;
- }
- static struct msm_gpi_tre *setup_cfg0_tre(struct geni_i2c_dev *gi2c)
- {
- struct geni_i2c_clk_fld *itr;
- struct msm_gpi_tre *cfg0_t = &gi2c->cfg0_t;
- bool gsi_bei = false;
- if (gi2c->gsi_tx.is_multi_descriptor)
- gsi_bei = true;
- if (gi2c->is_i2c_rtl_based)
- itr = geni_i2c_hub_clk_map + gi2c->clk_fld_idx;
- else
- itr = geni_i2c_clk_map + gi2c->clk_fld_idx;
-
- cfg0_t->dword[0] = MSM_GPI_I2C_CONFIG0_TRE_DWORD0(I2C_PACK_EN,
- itr->t_cycle, itr->t_high, itr->t_low);
- cfg0_t->dword[1] = MSM_GPI_I2C_CONFIG0_TRE_DWORD1(0, 0);
- cfg0_t->dword[2] = MSM_GPI_I2C_CONFIG0_TRE_DWORD2(0, itr->clk_div);
- cfg0_t->dword[3] = MSM_GPI_I2C_CONFIG0_TRE_DWORD3(0, gsi_bei, 0, 0, 1);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "cfg_tre 0x%x 0x%x 0x%x 0x%x\n",
- cfg0_t->dword[0], cfg0_t->dword[1], cfg0_t->dword[2], cfg0_t->dword[3]);
- return cfg0_t;
- }
- static struct msm_gpi_tre *setup_go_tre(struct geni_i2c_dev *gi2c,
- struct i2c_msg msgs[], int i, int num)
- {
- struct msm_gpi_tre *go_t = &gi2c->go_t;
- u8 op = (msgs[i].flags & I2C_M_RD) ? 2 : 1;
- int stretch = (i < (num - 1));
- bool gsi_bei = false;
- if (gi2c->gsi_tx.is_multi_descriptor)
- gsi_bei = true;
- go_t->dword[0] = MSM_GPI_I2C_GO_TRE_DWORD0((stretch << 2),
- msgs[i].addr, op);
- go_t->dword[1] = MSM_GPI_I2C_GO_TRE_DWORD1;
- if (msgs[i].flags & I2C_M_RD) {
- go_t->dword[2] = MSM_GPI_I2C_GO_TRE_DWORD2(msgs[i].len);
-
- if (!gi2c->is_shared || (gi2c->is_shared && i != num-1))
- go_t->dword[3] = MSM_GPI_I2C_GO_TRE_DWORD3(1, 0, 0, 1, 0);
- else
- go_t->dword[3] = MSM_GPI_I2C_GO_TRE_DWORD3(1, 0, 0, 0, 0);
- } else {
-
- go_t->dword[2] = MSM_GPI_I2C_GO_TRE_DWORD2(0);
- go_t->dword[3] = MSM_GPI_I2C_GO_TRE_DWORD3(0, gsi_bei, 0, 0, 1);
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "go_tre 0x%x 0x%x 0x%x 0x%x\n",
- go_t->dword[0], go_t->dword[1], go_t->dword[2], go_t->dword[3]);
- return go_t;
- }
- static struct msm_gpi_tre *setup_rx_tre(struct geni_i2c_dev *gi2c,
- struct i2c_msg msgs[], int i, int num)
- {
- struct msm_gpi_tre *rx_t = &gi2c->rx_t;
- rx_t->dword[0] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD0(gi2c->rx_ph);
- rx_t->dword[1] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD1(gi2c->rx_ph);
- rx_t->dword[2] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD2(msgs[i].len);
-
- rx_t->dword[3] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD3(0, 0, 1, 0, 0);
- return rx_t;
- }
- void geni_i2c_get_immediate_dma_data(u8 *dword, int len, uint8_t *buf)
- {
- int i = 0;
- for (i = 0; i < len; i++)
- dword[i] = buf[i];
- }
- static struct msm_gpi_tre *setup_tx_tre(struct geni_i2c_dev *gi2c,
- struct i2c_msg msgs[], int i, int num, bool *gsi_bei, int wr_idx)
- {
- struct msm_gpi_tre *tx_t = &gi2c->tx_t;
- bool is_immediate_dma = false;
- if (msgs[i].len <= IMMEDIATE_DMA_LEN)
- is_immediate_dma = true;
- if (gi2c->gsi_tx.is_multi_descriptor) {
- if ((i + 1) % NUM_TRE_MSGS_PER_INTR)
- *gsi_bei = true;
- else
- *gsi_bei = false;
-
- if (i == (num - 1))
- *gsi_bei = false;
- }
- if (is_immediate_dma) {
-
- tx_t->dword[0] = 0;
- tx_t->dword[1] = 0;
- geni_i2c_get_immediate_dma_data((uint8_t *)&tx_t->dword[0],
- msgs[i].len, msgs[i].buf);
- tx_t->dword[2] = MSM_GPI_DMA_IMMEDIATE_TRE_DWORD2(msgs[i].len);
- if (gi2c->is_shared && i == (num - 1))
-
- tx_t->dword[3] = MSM_GPI_DMA_IMMEDIATE_TRE_DWORD3(0, 0, 1, 0, 1);
- else
- tx_t->dword[3] = MSM_GPI_DMA_IMMEDIATE_TRE_DWORD3(0, *gsi_bei, 1, 0, 0);
- } else {
- tx_t->dword[0] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD0(gi2c->tx_ph[wr_idx]);
- tx_t->dword[1] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD1(gi2c->tx_ph[wr_idx]);
- tx_t->dword[2] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD2(msgs[i].len);
- if (gi2c->is_shared && (i == num - 1))
-
- tx_t->dword[3] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD3(0, 0, 1, 0, 1);
- else
- tx_t->dword[3] = MSM_GPI_DMA_W_BUFFER_TRE_DWORD3(0, *gsi_bei, 1, 0, 0);
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "tx_tre 0x%x 0x%x 0x%x 0x%x imm_dma:%d bei:%d\n",
- tx_t->dword[0], tx_t->dword[1], tx_t->dword[2], tx_t->dword[3],
- is_immediate_dma, *gsi_bei);
- return tx_t;
- }
- static struct msm_gpi_tre *setup_unlock_tre(struct geni_i2c_dev *gi2c)
- {
- struct msm_gpi_tre *unlock_t = &gi2c->unlock_t;
-
- unlock_t->dword[0] = MSM_GPI_UNLOCK_TRE_DWORD0;
- unlock_t->dword[1] = MSM_GPI_UNLOCK_TRE_DWORD1;
- unlock_t->dword[2] = MSM_GPI_UNLOCK_TRE_DWORD2;
- unlock_t->dword[3] = MSM_GPI_UNLOCK_TRE_DWORD3(0, 0, 0, 1, 0);
- return unlock_t;
- }
- static struct dma_async_tx_descriptor *geni_i2c_prep_desc
- (struct geni_i2c_dev *gi2c, struct dma_chan *chan, int segs, bool tx_chan)
- {
- struct dma_async_tx_descriptor *geni_desc = NULL;
- if (tx_chan) {
- geni_desc = dmaengine_prep_slave_sg(gi2c->tx_c, gi2c->tx_sg,
- segs, DMA_MEM_TO_DEV,
- (DMA_PREP_INTERRUPT | DMA_CTRL_ACK));
- if (!geni_desc) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "prep_slave_sg for tx failed\n");
- gi2c->err = -ENOMEM;
- return NULL;
- }
- geni_desc->callback = gi2c_gsi_tx_cb;
- geni_desc->callback_param = &gi2c->tx_cb;
- } else {
- geni_desc = dmaengine_prep_slave_sg(gi2c->rx_c,
- gi2c->rx_sg, 1, DMA_DEV_TO_MEM,
- (DMA_PREP_INTERRUPT | DMA_CTRL_ACK));
- if (!geni_desc) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "prep_slave_sg for rx failed\n");
- gi2c->err = -ENOMEM;
- return NULL;
- }
- geni_desc->callback = gi2c_gsi_rx_cb;
- geni_desc->callback_param = &gi2c->rx_cb;
- }
- return geni_desc;
- }
- static int geni_i2c_lock_bus(struct geni_i2c_dev *gi2c)
- {
- struct msm_gpi_tre *lock_t = NULL;
- int ret = 0, timeout = 0;
- dma_cookie_t tx_cookie;
- bool tx_chan = true;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- if (!gi2c->req_chan) {
- ret = geni_i2c_gsi_request_channel(gi2c);
- if (ret)
- return ret;
- }
- lock_t = setup_lock_tre(gi2c);
- sg_init_table(gi2c->tx_sg, 1);
- sg_set_buf(&gi2c->tx_sg[0], lock_t,
- sizeof(gi2c->lock_t));
- gi2c->tx_desc = geni_i2c_prep_desc(gi2c, gi2c->tx_c, 1, tx_chan);
- if (!gi2c->tx_desc) {
- gi2c->err = -ENOMEM;
- goto geni_i2c_err_lock_bus;
- }
- reinit_completion(&gi2c->xfer);
-
- tx_cookie = dmaengine_submit(gi2c->tx_desc);
- if (dma_submit_error(tx_cookie)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: dmaengine_submit failed (%d)\n", __func__, tx_cookie);
- gi2c->err = -EINVAL;
- goto geni_i2c_err_lock_bus;
- }
- dma_async_issue_pending(gi2c->tx_c);
- timeout = wait_for_completion_timeout(&gi2c->xfer, HZ);
- if (!timeout) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s timedout\n", __func__);
- geni_i2c_se_dump_dbg_regs(&gi2c->i2c_rsc, gi2c->base,
- gi2c->ipcl);
- gi2c->err = -ETIMEDOUT;
- goto geni_i2c_err_lock_bus;
- }
- return 0;
- geni_i2c_err_lock_bus:
- if (gi2c->err) {
- dmaengine_terminate_all(gi2c->tx_c);
- gi2c->cfg_sent = 0;
- }
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- return gi2c->err;
- }
- static void geni_i2c_unlock_bus(struct geni_i2c_dev *gi2c)
- {
- struct msm_gpi_tre *unlock_t = NULL;
- int timeout = 0;
- dma_cookie_t tx_cookie;
- bool tx_chan = true;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
-
- if (gi2c->is_le_vm && gi2c->le_gpi_reset_done) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s:gpi reset happened for levm, no need to do unlock\n", __func__);
- return;
- }
- unlock_t = setup_unlock_tre(gi2c);
- sg_init_table(gi2c->tx_sg, 1);
- sg_set_buf(&gi2c->tx_sg[0], unlock_t,
- sizeof(gi2c->unlock_t));
- gi2c->tx_desc = geni_i2c_prep_desc(gi2c, gi2c->tx_c, 1, tx_chan);
- if (!gi2c->tx_desc) {
- gi2c->err = -ENOMEM;
- goto geni_i2c_err_unlock_bus;
- }
- reinit_completion(&gi2c->xfer);
-
- tx_cookie = dmaengine_submit(gi2c->tx_desc);
- if (dma_submit_error(tx_cookie)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: dmaengine_submit failed (%d)\n", __func__, tx_cookie);
- gi2c->err = -EINVAL;
- goto geni_i2c_err_unlock_bus;
- }
- dma_async_issue_pending(gi2c->tx_c);
- timeout = wait_for_completion_timeout(&gi2c->xfer, HZ);
- if (!timeout) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s failed\n", __func__);
- geni_i2c_se_dump_dbg_regs(&gi2c->i2c_rsc, gi2c->base,
- gi2c->ipcl);
- gi2c->err = -ETIMEDOUT;
- goto geni_i2c_err_unlock_bus;
- }
- geni_i2c_err_unlock_bus:
- if (gi2c->err) {
- dmaengine_terminate_all(gi2c->tx_c);
- gi2c->cfg_sent = 0;
- gi2c->err = 0;
- }
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- }
- static int geni_i2c_gsi_tx_tre_optimization(struct geni_i2c_dev *gi2c, u32 num, u32 msg_idx,
- u32 wr_idx)
- {
- int timeout = 1, i;
- int max_irq_cnt;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- max_irq_cnt = num / NUM_TRE_MSGS_PER_INTR;
- if (num % NUM_TRE_MSGS_PER_INTR)
- max_irq_cnt++;
-
- if (gi2c->gsi_tx.is_multi_descriptor && !gi2c->is_shared) {
- for (i = 0; i < max_irq_cnt; i++) {
- if (max_irq_cnt != atomic_read(&gi2c->gsi_tx.irq_cnt)) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: calling wait for_completion %d\n", __func__, i);
- timeout = wait_for_completion_timeout(&gi2c->xfer,
- gi2c->xfer_timeout);
- reinit_completion(&gi2c->xfer);
- if (!timeout) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: msg xfer timeout\n", __func__);
- return timeout;
- }
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: maxirq_cnt:%d i:%d\n", __func__, max_irq_cnt, i);
- gi2c_gsi_tre_process(gi2c, num);
- if (num > gi2c->gsi_tx.msg_cnt)
- return timeout;
- }
- } else {
-
- timeout = wait_for_completion_timeout(&gi2c->xfer, gi2c->xfer_timeout);
- reinit_completion(&gi2c->xfer);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: msg_idx:%d wr_idx:%d\n", __func__, msg_idx, wr_idx);
-
- if (timeout && !gi2c->err)
- gi2c_gsi_tx_unmap(gi2c, msg_idx, wr_idx);
- }
-
- if (timeout) {
- if (gi2c->gsi_tx.is_multi_descriptor && !gi2c->is_shared)
- gi2c_gsi_tre_process(gi2c, num);
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: timeout :%d\n", __func__, timeout);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- return timeout;
- }
- static void geni_i2c_calc_xfer_time(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[],
- unsigned long long start_time, u32 msg_idx, const char *func)
- {
- char fname[32];
- if (msgs[msg_idx].flags & I2C_M_RD)
- scnprintf(fname, sizeof(fname), "%s%s", func, "_rd");
- else
- scnprintf(fname, sizeof(fname), "%s%s", func, "_wr");
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, fname, gi2c->i2c_kpi,
- start_time, msgs[msg_idx].len, gi2c->clk_freq_out);
- }
- static int geni_i2c_gsi_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
- int num)
- {
- struct geni_i2c_dev *gi2c = i2c_get_adapdata(adap);
- u32 i = 0;
- int ret = 0, timeout = 0;
- struct msm_gpi_tre *lock_t = NULL;
- struct msm_gpi_tre *unlock_t = NULL;
- struct msm_gpi_tre *cfg0_t = NULL;
- u8 *rd_dma_buf = NULL;
- u8 op;
- int segs;
- u32 index = 0, wr_idx = 0;
- dma_cookie_t tx_cookie, rx_cookie;
- struct msm_gpi_tre *go_t = NULL;
- struct msm_gpi_tre *rx_t = NULL;
- struct msm_gpi_tre *tx_t = NULL;
- bool tx_chan = true;
- bool gsi_bei = false;
- unsigned long long start_time;
- unsigned long long start_time_xfer = sched_clock();
- gi2c->gsi_err = false;
- if (!gi2c->req_chan) {
- ret = geni_i2c_gsi_request_channel(gi2c);
- if (ret)
- return ret;
- }
- if (gi2c->is_le_vm && gi2c->le_gpi_reset_done) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s doing gsi lock, due to levm gsi reset\n", __func__);
- ret = geni_i2c_lock_bus(gi2c);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s lock bus failed: %d\n", __func__, ret);
- return ret;
- }
- gi2c->le_gpi_reset_done = false;
- }
- if (gi2c->is_shared) {
- lock_t = setup_lock_tre(gi2c);
- unlock_t = setup_unlock_tre(gi2c);
- }
- gi2c->gsi_tx.is_multi_descriptor = false;
-
- if (num >= 4) {
- gi2c->gsi_tx.is_multi_descriptor = true;
-
- for (i = 0; i < num; i++)
- if (msgs[i].flags & I2C_M_RD)
- gi2c->gsi_tx.is_multi_descriptor = false;
- }
- if (!gi2c->cfg_sent)
- cfg0_t = setup_cfg0_tre(gi2c);
- gi2c->msgs = msgs;
- gi2c->gsi_tx.msg_cnt = 0;
- gi2c->gsi_tx.unmap_cnt = 0;
- gi2c->gsi_tx.tre_freed_cnt = 0;
- atomic_set(&gi2c->gsi_tx.irq_cnt, 0);
- reinit_completion(&gi2c->xfer);
- for (i = 0; i < num; i++) {
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- op = (msgs[i].flags & I2C_M_RD) ? 2 : 1;
- segs = 3 - op;
- index = 0;
-
- timeout = 1;
- gi2c->cur = &msgs[i];
- if (!gi2c->cur) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: Invalid buffer\n", __func__);
- ret = -ENOMEM;
- goto geni_i2c_gsi_xfer_out;
- }
- qcom_geni_i2c_calc_timeout(gi2c);
- if (!gi2c->cfg_sent)
- segs++;
- if (gi2c->is_shared && (i == 0 || i == num-1)) {
- segs++;
- if (num == 1)
- segs++;
- sg_init_table(gi2c->tx_sg, segs);
- if (i == 0)
-
- sg_set_buf(&gi2c->tx_sg[index++], lock_t,
- sizeof(gi2c->lock_t));
- } else {
- sg_init_table(gi2c->tx_sg, segs);
- }
-
- if (!gi2c->cfg_sent) {
- sg_set_buf(&gi2c->tx_sg[index++], cfg0_t,
- sizeof(gi2c->cfg0_t));
- gi2c->cfg_sent = 1;
- }
- go_t = setup_go_tre(gi2c, msgs, i, num);
- sg_set_buf(&gi2c->tx_sg[index++], go_t, sizeof(gi2c->go_t));
- if (msgs[i].flags & I2C_M_RD) {
- reinit_completion(&gi2c->xfer);
- rd_dma_buf = i2c_get_dma_safe_msg_buf(&msgs[i], 1);
- if (!rd_dma_buf) {
- ret = -ENOMEM;
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "i2c_get_dma_safe_msg_buf failed :%d\n",
- ret);
- goto geni_i2c_gsi_xfer_out;
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "msg[%d].len:%d R\n", i, gi2c->cur->len);
- sg_init_table(gi2c->rx_sg, 1);
- ret = geni_se_common_iommu_map_buf(gi2c->wrapper_dev,
- &gi2c->rx_ph,
- rd_dma_buf,
- msgs[i].len,
- DMA_FROM_DEVICE);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "geni_se_common_iommu_map_buf for rx failed :%d\n", ret);
- i2c_put_dma_safe_msg_buf(rd_dma_buf, &msgs[i], false);
- goto geni_i2c_gsi_xfer_out;
- } else if (gi2c->dbg_buf_ptr) {
- gi2c->dbg_buf_ptr[i].virt_buf =
- (void *)rd_dma_buf;
- gi2c->dbg_buf_ptr[i].map_buf =
- (void *)&gi2c->rx_ph;
- }
- rx_t = setup_rx_tre(gi2c, msgs, i, num);
- sg_set_buf(gi2c->rx_sg, rx_t,
- sizeof(gi2c->rx_t));
- gi2c->rx_desc =
- geni_i2c_prep_desc(gi2c, gi2c->rx_c, segs, !tx_chan);
- if (!gi2c->rx_desc) {
- gi2c->err = -ENOMEM;
- goto geni_i2c_err_prep_sg;
- }
-
- rx_cookie = dmaengine_submit(gi2c->rx_desc);
- if (dma_submit_error(rx_cookie)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: dmaengine_submit failed (%d)\n", __func__, rx_cookie);
- gi2c->err = -EINVAL;
- goto geni_i2c_err_prep_sg;
- }
- dma_async_issue_pending(gi2c->rx_c);
-
- if (gi2c->is_shared && (i == (num - 1))) {
-
- sg_set_buf(&gi2c->tx_sg[index++],
- unlock_t, sizeof(gi2c->unlock_t));
- }
- gi2c->tx_desc = geni_i2c_prep_desc(gi2c, gi2c->tx_c, segs, tx_chan);
- if (!gi2c->tx_desc) {
- gi2c->err = -ENOMEM;
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "geni_i2c_prep_desc failed\n");
- goto geni_i2c_err_prep_sg;
- }
-
- tx_cookie = dmaengine_submit(gi2c->tx_desc);
- if (dma_submit_error(tx_cookie)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: dmaengine_submit failed (%d)\n",
- __func__, tx_cookie);
- gi2c->err = -EINVAL;
- goto geni_i2c_err_prep_sg;
- }
- dma_async_issue_pending(gi2c->tx_c);
- timeout = wait_for_completion_timeout(&gi2c->xfer,
- gi2c->xfer_timeout);
- } else {
- if (msgs[i].len > IMMEDIATE_DMA_LEN) {
- gi2c->gsi_tx.dma_buf[wr_idx] =
- i2c_get_dma_safe_msg_buf(&msgs[i], 1);
- if (!gi2c->gsi_tx.dma_buf[wr_idx]) {
- ret = -ENOMEM;
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "i2c_get_dma_safe_msg_buf failed :%d\n", ret);
- goto geni_i2c_gsi_xfer_out;
- }
- ret = geni_se_common_iommu_map_buf(gi2c->wrapper_dev,
- &gi2c->tx_ph[wr_idx],
- gi2c->gsi_tx.dma_buf[wr_idx],
- msgs[i].len, DMA_TO_DEVICE);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "geni iommu_map_buf for tx failed :%d\n", ret);
- i2c_put_dma_safe_msg_buf(gi2c->gsi_tx.dma_buf[wr_idx],
- &msgs[i], false);
- goto geni_i2c_gsi_xfer_out;
- } else if (gi2c->dbg_buf_ptr) {
- gi2c->dbg_buf_ptr[wr_idx].virt_buf =
- (void *)gi2c->gsi_tx.dma_buf[wr_idx];
- gi2c->dbg_buf_ptr[wr_idx].map_buf =
- (void *)&gi2c->tx_ph[wr_idx];
- }
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "msg[%d].len:%d W cnt:%d idx:%d\n",
- i, gi2c->cur->len, gi2c->gsi_tx.msg_cnt, wr_idx);
- tx_t = setup_tx_tre(gi2c, msgs, i, num, &gsi_bei, wr_idx);
- sg_set_buf(&gi2c->tx_sg[index++], tx_t, sizeof(gi2c->tx_t));
- if (gi2c->is_shared && (i == (num - 1))) {
-
- sg_set_buf(&gi2c->tx_sg[index++],
- unlock_t, sizeof(gi2c->unlock_t));
- }
- gi2c->tx_desc = geni_i2c_prep_desc(gi2c, gi2c->tx_c, segs, tx_chan);
- if (!gi2c->tx_desc) {
- gi2c->err = -ENOMEM;
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "geni_i2c_prep_desc failed\n");
- goto geni_i2c_err_prep_sg;
- }
-
- if (gsi_bei) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "geni tx desc call back null %d\n", i);
- gi2c->tx_desc->callback = NULL;
- gi2c->tx_desc->callback_param = NULL;
- }
- gi2c->gsi_tx.msg_cnt++;
- wr_idx = (i + 1) % MAX_NUM_TRE_MSGS;
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "tx_cnt:%d", gi2c->gsi_tx.msg_cnt);
-
- tx_cookie = dmaengine_submit(gi2c->tx_desc);
- if (dma_submit_error(tx_cookie)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: dmaengine_submit failed (%d)\n",
- __func__, tx_cookie);
- gi2c->err = -EINVAL;
- goto geni_i2c_err_prep_sg;
- }
- dma_async_issue_pending(gi2c->tx_c);
-
- if (gi2c->gsi_tx.is_multi_descriptor && !gi2c->is_shared &&
- (i != (num - 1)) &&
- (gi2c->gsi_tx.msg_cnt < MAX_NUM_TRE_MSGS + gi2c->gsi_tx.tre_freed_cnt))
- continue;
- timeout = geni_i2c_gsi_tx_tre_optimization(gi2c, num, i, wr_idx - 1);
- }
- if (!timeout) {
- u32 geni_ios = 0;
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "I2C gsi xfer timeout:%u flags:%d addr:0x%x\n",
- gi2c->xfer_timeout, gi2c->cur->flags,
- gi2c->cur->addr);
- geni_i2c_se_dump_dbg_regs(&gi2c->i2c_rsc, gi2c->base,
- gi2c->ipcl);
- gi2c->err = -ETIMEDOUT;
-
- geni_ios = geni_read_reg(gi2c->base, SE_GENI_IOS);
- if ((geni_ios & 0x3) != 0x3) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: IO lines not in good state\n",
- __func__);
-
- if (gi2c->is_i2c_rtl_based) {
- gi2c->prev_cancel_pending = true;
- goto geni_i2c_gsi_cancel_pending;
- }
- }
- }
- geni_i2c_err_prep_sg:
- if (gi2c->err || gi2c->gsi_err) {
- ret = dmaengine_terminate_all(gi2c->tx_c);
- if (ret)
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: gpi terminate failed ret:%d\n", __func__, ret);
- gi2c->cfg_sent = 0;
- if (gi2c->is_le_vm)
- gi2c->le_gpi_reset_done = true;
- }
- if (gi2c->gsi_err) {
-
- if (!gi2c->err) {
- gi2c->err = -EIO;
- ret = gi2c->err;
- }
- gi2c->gsi_err = false;
- }
- if (gi2c->is_shared)
-
- gi2c->cfg_sent = 0;
- geni_i2c_gsi_cancel_pending:
- if (msgs[i].flags & I2C_M_RD) {
- geni_se_common_iommu_unmap_buf(gi2c->wrapper_dev, &gi2c->rx_ph,
- msgs[i].len, DMA_FROM_DEVICE);
- i2c_put_dma_safe_msg_buf(rd_dma_buf, &msgs[i], !gi2c->err);
- } else if (gi2c->err) {
-
- if (gi2c->gsi_tx.is_multi_descriptor && !gi2c->is_shared)
- gi2c_gsi_tre_process(gi2c, num);
- else
- gi2c_gsi_tx_unmap(gi2c, i, wr_idx - 1);
- }
- if (gi2c->err)
- goto geni_i2c_gsi_xfer_out;
- geni_i2c_calc_xfer_time(gi2c, msgs, start_time, i, __func__);
- }
- geni_i2c_gsi_xfer_out:
- if (!ret && gi2c->err)
- ret = gi2c->err;
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s Time took for %d xfers = %llu nsecs\n",
- __func__, num, (sched_clock() - start_time_xfer));
- return ret;
- }
- static int geni_i2c_execute_xfer(struct geni_i2c_dev *gi2c,
- struct i2c_msg msgs[], int num)
- {
- int i, ret = 0, timeout = 0;
- u32 geni_ios = 0;
- unsigned long long start_time;
- unsigned long long start_time_xfer = sched_clock();
- for (i = 0; i < num; i++) {
- int stretch = (i < (num - 1));
- u32 m_param = 0;
- u32 m_cmd = 0;
- u8 *dma_buf = NULL;
- dma_addr_t tx_dma = 0;
- dma_addr_t rx_dma = 0;
- enum geni_se_xfer_mode mode = GENI_SE_FIFO;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- reinit_completion(&gi2c->xfer);
- m_param |= (stretch ? STOP_STRETCH : 0);
- m_param |= ((msgs[i].addr & 0x7F) << SLV_ADDR_SHFT);
- gi2c->cur = &msgs[i];
- if (!gi2c->cur) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: Invalid buffer\n", __func__);
- ret = -ENOMEM;
- goto geni_i2c_execute_xfer_exit;
- }
- qcom_geni_i2c_calc_timeout(gi2c);
- if (!gi2c->is_i2c_hub)
- mode = msgs[i].len > 32 ? GENI_SE_DMA : GENI_SE_FIFO;
- else
- mode = GENI_SE_FIFO;
- geni_se_select_mode(&gi2c->i2c_rsc, mode);
- if (mode == GENI_SE_DMA) {
- dma_buf = i2c_get_dma_safe_msg_buf(&msgs[i], 1);
- if (!dma_buf) {
- ret = -ENOMEM;
- goto geni_i2c_execute_xfer_exit;
- }
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: stretch:%d, m_param:0x%x\n",
- __func__, stretch, m_param);
- if (msgs[i].flags & I2C_M_RD) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "msgs[%d].len:%d R\n", i, gi2c->cur->len);
- geni_write_reg(msgs[i].len,
- gi2c->base, SE_I2C_RX_TRANS_LEN);
- m_cmd = I2C_READ;
- geni_se_setup_m_cmd(&gi2c->i2c_rsc, m_cmd, m_param);
- if (mode == GENI_SE_DMA) {
- ret = geni_se_rx_dma_prep(&gi2c->i2c_rsc,
- dma_buf, msgs[i].len,
- &rx_dma);
- if (ret) {
- i2c_put_dma_safe_msg_buf(dma_buf,
- &msgs[i], false);
- mode = GENI_SE_FIFO;
- geni_se_select_mode(&gi2c->i2c_rsc,
- mode);
- } else if (gi2c->dbg_buf_ptr) {
- gi2c->dbg_buf_ptr[i].virt_buf =
- (void *)dma_buf;
- gi2c->dbg_buf_ptr[i].map_buf =
- (void *)&rx_dma;
- }
- }
- } else {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "msgs[%d].len:%d W\n", i, gi2c->cur->len);
- geni_write_reg(msgs[i].len, gi2c->base,
- SE_I2C_TX_TRANS_LEN);
- m_cmd = I2C_WRITE;
- geni_se_setup_m_cmd(&gi2c->i2c_rsc, m_cmd, m_param);
- if (mode == GENI_SE_DMA) {
- ret = geni_se_tx_dma_prep(&gi2c->i2c_rsc,
- dma_buf, msgs[i].len,
- &tx_dma);
- if (ret) {
- i2c_put_dma_safe_msg_buf(dma_buf,
- &msgs[i], false);
- mode = GENI_SE_FIFO;
- geni_se_select_mode(&gi2c->i2c_rsc,
- mode);
- } else if (gi2c->dbg_buf_ptr) {
- gi2c->dbg_buf_ptr[i].virt_buf =
- (void *)dma_buf;
- gi2c->dbg_buf_ptr[i].map_buf =
- (void *)&tx_dma;
- }
- }
- if (mode == GENI_SE_FIFO)
- geni_write_reg(1, gi2c->base,
- SE_GENI_TX_WATERMARK_REG);
- }
-
- mb();
- timeout = wait_for_completion_timeout(&gi2c->xfer,
- gi2c->xfer_timeout);
- if (!timeout) {
- u32 geni_ios = 0;
- u32 m_stat = readl_relaxed(gi2c->base + SE_GENI_M_IRQ_STATUS);
-
- writel_relaxed(0, (gi2c->base + SE_GENI_TX_WATERMARK_REG));
- if (m_stat)
- writel_relaxed(m_stat, gi2c->base + SE_GENI_M_IRQ_CLEAR);
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "I2C xfer timeout: %d\n", gi2c->xfer_timeout);
- geni_i2c_err(gi2c, GENI_TIMEOUT);
-
- geni_ios = geni_read_reg(gi2c->base, SE_GENI_IOS);
- if ((geni_ios & 0x3) != 0x3) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s: IO lines not good: 0x%x\n",
- __func__, geni_ios);
-
- if (gi2c->is_i2c_rtl_based) {
- gi2c->prev_cancel_pending = true;
- goto geni_i2c_execute_xfer_exit;
- }
- }
- } else {
- if (msgs[i].flags & I2C_M_RD)
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s: Read operation completed for len:%d\n",
- __func__, msgs[i].len);
- else
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s:Write operation completed for len:%d\n",
- __func__, msgs[i].len);
- }
- if (gi2c->err) {
- if (gi2c->is_i2c_rtl_based) {
-
- geni_ios = geni_read_reg(gi2c->base, SE_GENI_IOS);
- if ((geni_ios & 0x3) != 0x3) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s: IO lines not in good state\n",
- __func__);
- gi2c->prev_cancel_pending = true;
- goto geni_i2c_execute_xfer_exit;
- }
-
- if (gi2c->err == -EBUSY) {
- I2C_LOG_DBG(gi2c->ipcl, true, gi2c->dev,
- "%s:run reg68 war\n", __func__);
- do_reg68_war_for_rtl_se(gi2c);
- }
- }
- geni_i2c_stop_with_cancel(gi2c);
- }
- gi2c->cur_wr = 0;
- gi2c->cur_rd = 0;
- if (mode == GENI_SE_DMA) {
- if (gi2c->err) {
- reinit_completion(&gi2c->xfer);
- if (msgs[i].flags != I2C_M_RD)
- writel_relaxed(1, gi2c->base +
- SE_DMA_TX_FSM_RST);
- else
- writel_relaxed(1, gi2c->base +
- SE_DMA_RX_FSM_RST);
- wait_for_completion_timeout(&gi2c->xfer, HZ);
- }
- if (rx_dma)
- geni_se_rx_dma_unprep(&gi2c->i2c_rsc, rx_dma,
- msgs[i].len);
- if (tx_dma)
- geni_se_tx_dma_unprep(&gi2c->i2c_rsc, tx_dma,
- msgs[i].len);
- i2c_put_dma_safe_msg_buf(dma_buf, &msgs[i], !gi2c->err);
- }
- ret = gi2c->err;
- if (gi2c->err) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "i2c error :%d\n", gi2c->err);
- if (geni_i2c_bus_recovery(gi2c))
- GENI_SE_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s:Bus Recovery failed\n", __func__);
- break;
- }
- geni_i2c_calc_xfer_time(gi2c, msgs, start_time, i, __func__);
- }
- geni_i2c_execute_xfer_exit:
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s Time took for %d xfers = %llu nsecs\n",
- __func__, num, (sched_clock() - start_time_xfer));
- return ret;
- }
- static int geni_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
- int num)
- {
- struct geni_i2c_dev *gi2c = i2c_get_adapdata(adap);
- int ret = 0;
- u32 geni_ios = 0;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- gi2c->err = 0;
- atomic_set(&gi2c->is_xfer_in_progress, 1);
-
- if (!pm_runtime_enabled(gi2c->dev)) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: System suspended\n", __func__);
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- return -EACCES;
- }
-
- if (!gi2c->is_le_vm && !gi2c->pm_ctrl_client) {
- ret = pm_runtime_get_sync(gi2c->dev);
- if (ret < 0) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "error turning SE resources:%d\n", ret);
- pm_runtime_put_noidle(gi2c->dev);
-
- pm_runtime_set_suspended(gi2c->dev);
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- return ret;
- }
- }
-
- if (gi2c->prev_cancel_pending) {
- ret = do_pending_cancel(gi2c);
- if (ret) {
-
- if (!gi2c->is_le_vm) {
- pm_runtime_mark_last_busy(gi2c->dev);
- pm_runtime_put_autosuspend(gi2c->dev);
- }
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- return ret;
- }
- }
- geni_ios = geni_read_reg(gi2c->base, SE_GENI_IOS);
- if (!gi2c->is_shared && ((geni_ios & 0x3) != 0x3)) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "IO lines in bad state, Power the slave\n");
-
- if (!gi2c->is_le_vm) {
- pm_runtime_mark_last_busy(gi2c->dev);
- pm_runtime_put_autosuspend(gi2c->dev);
- }
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- return -ENXIO;
- }
- if (gi2c->is_le_vm && (!gi2c->first_xfer_done)) {
-
- gi2c->first_xfer_done = true;
- ret = geni_i2c_prepare(gi2c);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s I2C prepare failed: %d\n", __func__, ret);
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- return ret;
- }
- ret = geni_i2c_lock_bus(gi2c);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s lock failed: %d\n", __func__, ret);
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- return ret;
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "LE-VM first xfer\n");
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "n:%d addr:0x%x\n", num, msgs[0].addr);
- gi2c->dbg_num = num;
- kfree(gi2c->dbg_buf_ptr);
- gi2c->dbg_buf_ptr =
- kcalloc(num, sizeof(struct dbg_buf_ctxt), GFP_KERNEL);
- if (!gi2c->dbg_buf_ptr)
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "Buf logging pointer not available\n");
- if (gi2c->se_mode == GSI_ONLY) {
- ret = geni_i2c_gsi_xfer(adap, msgs, num);
- goto geni_i2c_txn_ret;
- } else {
-
- gi2c->is_shared = false;
- }
- ret = geni_i2c_execute_xfer(gi2c, msgs, num);
- geni_i2c_txn_ret:
- if (ret == 0)
- ret = num;
-
- if (!gi2c->is_le_vm && !gi2c->pm_ctrl_client) {
- pm_runtime_mark_last_busy(gi2c->dev);
- pm_runtime_put_autosuspend(gi2c->dev);
- }
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- gi2c->cur = NULL;
- gi2c->err = 0;
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "i2c txn ret:%d freq=%dHz\n", ret, gi2c->clk_freq_out);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, gi2c->clk_freq_out);
- return ret;
- }
- static u32 geni_i2c_func(struct i2c_adapter *adap)
- {
- return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
- }
- static const struct i2c_algorithm geni_i2c_algo = {
- .master_xfer = geni_i2c_xfer,
- .functionality = geni_i2c_func,
- };
- #if I2C_HUB_DEF
- static int get_geni_se_i2c_hub(struct geni_i2c_dev *gi2c)
- {
- int ret = 0;
- int geni_hw_param;
- ret = geni_se_common_clks_on(gi2c->i2c_rsc.clk, gi2c->m_ahb_clk, gi2c->s_ahb_clk);
- if (ret) {
- dev_err(gi2c->dev, "%s: Err in geni_se_clks_on %d\n", __func__, ret);
- return ret;
- }
- geni_hw_param = geni_read_reg(gi2c->base, GENI_HW_PARAM);
- if (geni_hw_param & I2C_MASTER_HUB)
- gi2c->is_i2c_hub = true;
- else
- gi2c->is_i2c_hub = false;
- geni_se_common_clks_off(gi2c->i2c_rsc.clk, gi2c->m_ahb_clk, gi2c->s_ahb_clk);
- return ret;
- }
- #endif
- static int geni_i2c_resources_init(struct platform_device *pdev, struct geni_i2c_dev *gi2c)
- {
- int ret;
-
- if (gi2c->is_le_vm)
- return 0;
- gi2c->i2c_rsc.clk = devm_clk_get(&pdev->dev, "se-clk");
- if (IS_ERR(gi2c->i2c_rsc.clk)) {
- ret = PTR_ERR(gi2c->i2c_rsc.clk);
- dev_err(&pdev->dev, "Err getting SE Core clk %d\n",
- ret);
- return ret;
- }
- gi2c->m_ahb_clk = devm_clk_get(gi2c->dev->parent, "m-ahb");
- if (IS_ERR(gi2c->m_ahb_clk)) {
- ret = PTR_ERR(gi2c->m_ahb_clk);
- dev_err(&pdev->dev, "Err getting M AHB clk %d\n", ret);
- return ret;
- }
- gi2c->s_ahb_clk = devm_clk_get(gi2c->dev->parent, "s-ahb");
- if (IS_ERR(gi2c->s_ahb_clk)) {
- ret = PTR_ERR(gi2c->s_ahb_clk);
- dev_err(&pdev->dev, "Err getting S AHB clk %d\n", ret);
- return ret;
- }
- gi2c->is_i2c_hub = of_property_read_bool(pdev->dev.of_node,
- "qcom,i2c-hub");
- gi2c->is_high_perf = of_property_read_bool(pdev->dev.of_node,
- "qcom,high-perf");
-
- if (gi2c->is_i2c_hub) {
- gi2c->core_clk = devm_clk_get(&pdev->dev, "core-clk");
- if (IS_ERR(gi2c->core_clk)) {
- ret = PTR_ERR(gi2c->core_clk);
- dev_err(&pdev->dev, "Err getting core-clk %d\n", ret);
- return ret;
- }
- ret = geni_icc_get(&gi2c->i2c_rsc, NULL);
- if (ret) {
- dev_err(&pdev->dev, "%s: Error - geni_icc_get ret:%d\n",
- __func__, ret);
- return ret;
- }
- gi2c->i2c_rsc.icc_paths[GENI_TO_CORE].avg_bw = GENI_DEFAULT_BW;
- gi2c->i2c_rsc.icc_paths[CPU_TO_GENI].avg_bw = GENI_DEFAULT_BW;
-
- gi2c->is_i2c_rtl_based = true;
- dev_info(gi2c->dev, "%s: RTL based SE\n", __func__);
- } else {
- if (gi2c->is_high_perf)
- ret =
- geni_se_common_resources_init(&gi2c->i2c_rsc,
- I2C_CORE2X_VOTE, GENI_DEFAULT_BW,
- (DEFAULT_SE_CLK * DEFAULT_BUS_WIDTH));
- else
- ret =
- geni_se_common_resources_init(&gi2c->i2c_rsc,
- GENI_DEFAULT_BW, GENI_DEFAULT_BW,
- Bps_to_icc(gi2c->clk_freq_out));
- if (ret) {
- dev_err(&pdev->dev, "%s: Error - resources_init ret:%d\n",
- __func__, ret);
- return ret;
- }
- }
- gi2c->irq = platform_get_irq(pdev, 0);
- if (gi2c->irq < 0)
- return gi2c->irq;
- irq_set_status_flags(gi2c->irq, IRQ_NOAUTOEN);
- ret = devm_request_irq(gi2c->dev, gi2c->irq, geni_i2c_irq,
- 0, "i2c_geni", gi2c);
- if (ret) {
- dev_err(gi2c->dev, "Request_irq failed:%d: err:%d\n",
- gi2c->irq, ret);
- return ret;
- }
- return 0;
- }
- static int geni_i2c_probe(struct platform_device *pdev)
- {
- struct geni_i2c_dev *gi2c;
- struct resource *res;
- int ret;
- struct device *dev = &pdev->dev;
- gi2c = devm_kzalloc(&pdev->dev, sizeof(*gi2c), GFP_KERNEL);
- if (!gi2c)
- return -ENOMEM;
- if (arr_idx < MAX_SE)
-
- gi2c_dev_dbg[arr_idx++] = gi2c;
- gi2c->dev = dev;
- pr_info("boot_kpi: M - DRIVER GENI_I2C Init\n");
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -EINVAL;
- gi2c->base = devm_ioremap_resource(gi2c->dev, res);
- if (IS_ERR(gi2c->base))
- return PTR_ERR(gi2c->base);
- if (of_property_read_bool(pdev->dev.of_node, "qcom,le-vm")) {
- gi2c->is_le_vm = true;
- gi2c->first_xfer_done = false;
- dev_info(&pdev->dev, "LE-VM usecase\n");
- }
- if (of_property_read_bool(pdev->dev.of_node, "qcom,pm-ctrl-client")) {
- gi2c->pm_ctrl_client = true;
- dev_info(&pdev->dev, "Client controls the I2C PM\n");
- }
- if (of_property_read_bool(pdev->dev.of_node, "qcom,leica-used-i2c"))
- gi2c->skip_bw_vote = true;
- gi2c->i2c_test_dev = false;
- if (of_property_read_bool(pdev->dev.of_node, "qcom,i2c-test-dev")) {
- gi2c->i2c_test_dev = true;
- dev_info(&pdev->dev, "%s: This is I2C device under test\n", __func__);
- }
- gi2c->i2c_rsc.dev = dev;
- gi2c->i2c_rsc.wrapper = dev_get_drvdata(dev->parent);
- gi2c->i2c_rsc.base = gi2c->base;
- gi2c->wrapper_dev = dev->parent;
- if (!gi2c->i2c_rsc.wrapper) {
- dev_err(&pdev->dev, "SE Wrapper is NULL, deferring probe\n");
- return -EPROBE_DEFER;
- }
- if (of_property_read_u32(pdev->dev.of_node, "qcom,clk-freq-out",
- &gi2c->clk_freq_out))
- gi2c->clk_freq_out = KHz(400);
- dev_info(&pdev->dev, "Bus frequency is set to %dHz.\n",
- gi2c->clk_freq_out);
-
- ret = geni_i2c_clk_map_idx(gi2c);
- if (ret) {
- dev_err(gi2c->dev, "Invalid clk frequency %d KHz: %d\n",
- gi2c->clk_freq_out, ret);
- return ret;
- }
-
- ret = geni_i2c_resources_init(pdev, gi2c);
- if (ret)
- return ret;
- if (of_property_read_bool(pdev->dev.of_node, "qcom,shared")) {
- gi2c->is_shared = true;
- dev_info(&pdev->dev, "Multi-EE usecase\n");
- }
-
- if (of_property_read_bool(pdev->dev.of_node, "qcom,bus-recovery")) {
- gi2c->bus_recovery_enable = true;
- dev_dbg(&pdev->dev, "%s:I2C Bus recovery enabled\n", __func__);
- }
- ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
- if (ret) {
- ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
- if (ret) {
- dev_err(&pdev->dev, "could not set DMA mask\n");
- return ret;
- }
- }
- gi2c->tx_sg = dmam_alloc_coherent(gi2c->dev, 5*sizeof(struct scatterlist),
- &gi2c->tx_sg_dma, GFP_KERNEL);
- if (!gi2c->tx_sg) {
- dev_err(&pdev->dev, "could not allocate for tx_sg\n");
- return -ENOMEM;
- }
- gi2c->rx_sg = dmam_alloc_coherent(gi2c->dev, sizeof(struct scatterlist),
- &gi2c->rx_sg_dma, GFP_KERNEL);
- if (!gi2c->rx_sg) {
- dev_err(&pdev->dev, "could not allocate for rx_sg\n");
- return -ENOMEM;
- }
- gi2c->adap.algo = &geni_i2c_algo;
- init_completion(&gi2c->xfer);
- init_completion(&gi2c->m_cancel_cmd);
- platform_set_drvdata(pdev, gi2c);
- i2c_set_adapdata(&gi2c->adap, gi2c);
- gi2c->adap.dev.parent = gi2c->dev;
- gi2c->adap.dev.of_node = pdev->dev.of_node;
- strscpy(gi2c->adap.name, "Geni-I2C", sizeof(gi2c->adap.name));
- pm_runtime_set_suspended(gi2c->dev);
-
- if (!gi2c->is_le_vm) {
- pm_runtime_set_autosuspend_delay(gi2c->dev, I2C_AUTO_SUSPEND_DELAY);
- pm_runtime_use_autosuspend(gi2c->dev);
- }
- pm_runtime_enable(gi2c->dev);
- ret = i2c_add_adapter(&gi2c->adap);
- if (ret) {
- dev_err(gi2c->dev, "Add adapter failed, ret=%d\n", ret);
- return ret;
- }
- device_create_file(gi2c->dev, &dev_attr_capture_kpi);
- atomic_set(&gi2c->is_xfer_in_progress, 0);
- if (gi2c->i2c_test_dev) {
-
- test_bus_enable_per_qupv3(gi2c->wrapper_dev, gi2c->ipcl);
- }
- pr_info("boot_kpi: M - DRIVER GENI_I2C_%d Ready\n", gi2c->adap.nr);
- dev_info(gi2c->dev, "I2C probed\n");
- return 0;
- }
- static int geni_i2c_remove(struct platform_device *pdev)
- {
- struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
- int i;
- if (atomic_read(&gi2c->is_xfer_in_progress)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: Xfer is in progress\n", __func__);
- return -EBUSY;
- }
- if (!pm_runtime_status_suspended(gi2c->dev)) {
- if (geni_i2c_runtime_suspend(gi2c->dev))
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: runtime suspend failed\n", __func__);
- }
- if (gi2c->se_mode == GSI_ONLY) {
- if (gi2c->tx_c) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: clearing tx dma resource\n", __func__);
- dma_release_channel(gi2c->tx_c);
- }
- if (gi2c->rx_c) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s: clearing rx dma resource\n", __func__);
- dma_release_channel(gi2c->rx_c);
- }
- }
- pm_runtime_put_noidle(gi2c->dev);
- pm_runtime_set_suspended(gi2c->dev);
- pm_runtime_disable(gi2c->dev);
- i2c_del_adapter(&gi2c->adap);
- for (i = 0; i < arr_idx; i++)
- gi2c_dev_dbg[i] = NULL;
- arr_idx = 0;
- device_remove_file(gi2c->dev, &dev_attr_capture_kpi);
- if (gi2c->ipc_log_kpi)
- ipc_log_context_destroy(gi2c->ipc_log_kpi);
- if (gi2c->ipcl)
- ipc_log_context_destroy(gi2c->ipcl);
- return 0;
- }
- static void geni_i2c_shutdown(struct platform_device *pdev)
- {
- struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "Enter %s:%d\n", __func__, true);
-
- i2c_mark_adapter_suspended(&gi2c->adap);
- }
- static int geni_i2c_resume_early(struct device *device)
- {
- struct geni_i2c_dev *gi2c = dev_get_drvdata(device);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s ret=%d\n", __func__, true);
- return 0;
- }
- static int geni_i2c_hib_resume_noirq(struct device *device)
- {
- struct geni_i2c_dev *gi2c = dev_get_drvdata(device);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s\n", __func__);
- gi2c->se_mode = UNINITIALIZED;
- return 0;
- }
- #if IS_ENABLED(CONFIG_PM)
- static int geni_i2c_gpi_pause_resume(struct geni_i2c_dev *gi2c, bool is_suspend)
- {
- int tx_ret = 0;
-
- if (gi2c->tx_c) {
- if (is_suspend) {
- tx_ret = dmaengine_pause(gi2c->tx_c);
- } else {
-
- tx_ret = dmaengine_resume(gi2c->tx_c);
-
- }
- if (tx_ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s failed: tx:%d status:%d\n",
- __func__, tx_ret, is_suspend);
- return -EINVAL;
- }
- }
- return 0;
- }
- static int geni_i2c_runtime_suspend(struct device *dev)
- {
- int ret = 0;
- struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- if (gi2c->se_mode == FIFO_SE_DMA)
- disable_irq(gi2c->irq);
- if (gi2c->se_mode == GSI_ONLY) {
- if (!gi2c->is_le_vm) {
- ret = geni_i2c_gpi_pause_resume(gi2c, true);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: ret:%d\n", __func__, ret);
- return ret;
- }
- }
- }
- if (gi2c->skip_bw_vote) {
- if (gi2c->is_shared) {
-
- geni_se_common_clks_off(gi2c->i2c_rsc.clk,
- gi2c->m_ahb_clk, gi2c->s_ahb_clk);
- } else if (!gi2c->is_le_vm) {
- geni_se_resources_off(&gi2c->i2c_rsc);
- }
- goto skip_bw_vote;
- }
- if (gi2c->is_le_vm && gi2c->first_xfer_done) {
- geni_i2c_unlock_bus(gi2c);
- if (gi2c->se_mode == GSI_ONLY) {
- ret = geni_i2c_gpi_pause_resume(gi2c, true);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: ret:%d\n", __func__, ret);
- return ret;
- }
- }
- }
- else if (gi2c->is_shared) {
-
- geni_se_common_clks_off(gi2c->i2c_rsc.clk, gi2c->m_ahb_clk, gi2c->s_ahb_clk);
- ret = geni_icc_disable(&gi2c->i2c_rsc);
- if (ret)
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s failing at geni_icc_disable ret=%d\n", __func__, ret);
- } else if (!gi2c->is_le_vm) {
- geni_se_resources_off(&gi2c->i2c_rsc);
- ret = geni_icc_disable(&gi2c->i2c_rsc);
- if (ret)
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s failing at geni_icc_disable ret=%d\n", __func__, ret);
- }
- skip_bw_vote:
- if (gi2c->is_i2c_hub)
- clk_disable_unprepare(gi2c->core_clk);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s ret=%d\n", __func__, ret);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- return 0;
- }
- static int geni_i2c_runtime_resume(struct device *dev)
- {
- int ret = 0;
- struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- if (!gi2c->ipcl) {
- char ipc_name[I2C_NAME_SIZE];
- snprintf(ipc_name, I2C_NAME_SIZE, "%s", dev_name(gi2c->dev));
- gi2c->ipcl = ipc_log_context_create(2, ipc_name, 0);
- }
- if (!gi2c->is_le_vm) {
- if (gi2c->skip_bw_vote)
- goto skip_bw_vote;
- ret = geni_icc_enable(&gi2c->i2c_rsc);
- if (ret) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s failing at geni icc enable ret=%d\n", __func__, ret);
- return ret;
- }
- ret = geni_icc_set_bw(&gi2c->i2c_rsc);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s failing at icc set bw ret=%d\n", __func__, ret);
- return ret;
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: GENI_TO_CORE:%d CPU_TO_GENI:%d GENI_TO_DDR:%d\n",
- __func__, gi2c->i2c_rsc.icc_paths[GENI_TO_CORE].avg_bw,
- gi2c->i2c_rsc.icc_paths[CPU_TO_GENI].avg_bw,
- gi2c->i2c_rsc.icc_paths[GENI_TO_DDR].avg_bw);
- skip_bw_vote:
- if (gi2c->is_i2c_hub) {
- ret = clk_prepare_enable(gi2c->core_clk);
- if (ret) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s failing at core clk prepare enable ret=%d\n", __func__, ret);
- return ret;
- }
- }
-
- ret = geni_se_resources_on(&gi2c->i2c_rsc);
- if (ret)
- return ret;
- ret = geni_i2c_prepare(gi2c);
- if (ret) {
- dev_err(gi2c->dev, "I2C prepare failed: %d\n", ret);
- return ret;
- }
- geni_write_reg(0x7f, gi2c->base, GENI_OUTPUT_CTRL);
-
- udelay(10);
- if (gi2c->se_mode == FIFO_SE_DMA)
- enable_irq(gi2c->irq);
- if (gi2c->se_mode == GSI_ONLY) {
- ret = geni_i2c_gpi_pause_resume(gi2c, false);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: ret:%d\n", __func__, ret);
- return ret;
- }
- }
- } else if (gi2c->is_le_vm && gi2c->first_xfer_done) {
-
- ret = geni_i2c_prepare(gi2c);
- if (ret) {
- dev_err(gi2c->dev, "I2C prepare failed:%d\n", ret);
- return ret;
- }
- if (gi2c->se_mode == GSI_ONLY) {
- ret = geni_i2c_gpi_pause_resume(gi2c, false);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, false, gi2c->dev,
- "%s: ret:%d\n", __func__, ret);
- return ret;
- }
- }
- ret = geni_i2c_lock_bus(gi2c);
- if (ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s failed: %d\n", __func__, ret);
- return ret;
- }
- }
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s ret=%d\n", __func__, ret);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- return 0;
- }
- static int geni_i2c_suspend_late(struct device *device)
- {
- struct geni_i2c_dev *gi2c = dev_get_drvdata(device);
- int ret;
- unsigned long long start_time;
- start_time = geni_capture_start_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi);
- if (atomic_read(&gi2c->is_xfer_in_progress)) {
- if (!pm_runtime_status_suspended(gi2c->dev)) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- ":%s: runtime PM is active\n", __func__);
- return -EBUSY;
- }
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "%s System suspend not allowed while xfer in progress\n",
- __func__);
- return -EBUSY;
- }
-
- ret = i2c_trylock_bus(&gi2c->adap, I2C_LOCK_SEGMENT);
- if (!ret) {
- I2C_LOG_ERR(gi2c->ipcl, true, gi2c->dev,
- "late I2C transaction request\n");
- return -EBUSY;
- }
- if (!pm_runtime_status_suspended(device)) {
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev,
- "%s: Force suspend\n", __func__);
- geni_i2c_runtime_suspend(device);
- pm_runtime_disable(device);
- pm_runtime_set_suspended(device);
- pm_runtime_enable(device);
- }
- i2c_unlock_bus(&gi2c->adap, I2C_LOCK_SEGMENT);
- I2C_LOG_DBG(gi2c->ipcl, false, gi2c->dev, "%s ret=%d\n", __func__, ret);
- geni_capture_stop_time(&gi2c->i2c_rsc, gi2c->ipc_log_kpi, __func__,
- gi2c->i2c_kpi, start_time, 0, 0);
- return 0;
- }
- #else
- static int geni_i2c_runtime_suspend(struct device *dev)
- {
- return 0;
- }
- static int geni_i2c_runtime_resume(struct device *dev)
- {
- return 0;
- }
- static int geni_i2c_suspend_late(struct device *device)
- {
- return 0;
- }
- #endif
- static const struct dev_pm_ops geni_i2c_pm_ops = {
- .suspend_late = geni_i2c_suspend_late,
- .resume_early = geni_i2c_resume_early,
- .runtime_suspend = geni_i2c_runtime_suspend,
- .runtime_resume = geni_i2c_runtime_resume,
- .freeze = geni_i2c_suspend_late,
- .restore = geni_i2c_hib_resume_noirq,
- .thaw = geni_i2c_hib_resume_noirq,
- };
- static const struct of_device_id geni_i2c_dt_match[] = {
- { .compatible = "qcom,i2c-geni" },
- {}
- };
- MODULE_DEVICE_TABLE(of, geni_i2c_dt_match);
- static struct platform_driver geni_i2c_driver = {
- .probe = geni_i2c_probe,
- .remove = geni_i2c_remove,
- .shutdown = geni_i2c_shutdown,
- .driver = {
- .name = "i2c_geni",
- .pm = &geni_i2c_pm_ops,
- .of_match_table = geni_i2c_dt_match,
- },
- };
- static int __init i2c_dev_init(void)
- {
- return platform_driver_register(&geni_i2c_driver);
- }
- static void __exit i2c_dev_exit(void)
- {
- platform_driver_unregister(&geni_i2c_driver);
- }
- module_init(i2c_dev_init);
- module_exit(i2c_dev_exit);
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:i2c_geni");
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