From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/drivers/i2c/busses/i2c-qcom-geni.c | 323 ++++++++++++++++++++++++++++++++---------------------
1 files changed, 193 insertions(+), 130 deletions(-)
diff --git a/kernel/drivers/i2c/busses/i2c-qcom-geni.c b/kernel/drivers/i2c/busses/i2c-qcom-geni.c
index d732917..86f028f 100644
--- a/kernel/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/kernel/drivers/i2c/busses/i2c-qcom-geni.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
+#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
@@ -9,7 +10,6 @@
#include <linux/io.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/qcom-geni-se.h>
@@ -86,6 +86,9 @@
u32 clk_freq_out;
const struct geni_i2c_clk_fld *clk_fld;
int suspended;
+ void *dma_buf;
+ size_t xfer_len;
+ dma_addr_t dma_addr;
};
struct geni_i2c_err_log {
@@ -201,21 +204,22 @@
static irqreturn_t geni_i2c_irq(int irq, void *dev)
{
struct geni_i2c_dev *gi2c = dev;
- int j;
+ void __iomem *base = gi2c->se.base;
+ int j, p;
u32 m_stat;
u32 rx_st;
u32 dm_tx_st;
u32 dm_rx_st;
u32 dma;
+ u32 val;
struct i2c_msg *cur;
- unsigned long flags;
- spin_lock_irqsave(&gi2c->lock, flags);
- m_stat = readl_relaxed(gi2c->se.base + SE_GENI_M_IRQ_STATUS);
- rx_st = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFO_STATUS);
- dm_tx_st = readl_relaxed(gi2c->se.base + SE_DMA_TX_IRQ_STAT);
- dm_rx_st = readl_relaxed(gi2c->se.base + SE_DMA_RX_IRQ_STAT);
- dma = readl_relaxed(gi2c->se.base + SE_GENI_DMA_MODE_EN);
+ spin_lock(&gi2c->lock);
+ m_stat = readl_relaxed(base + SE_GENI_M_IRQ_STATUS);
+ rx_st = readl_relaxed(base + SE_GENI_RX_FIFO_STATUS);
+ dm_tx_st = readl_relaxed(base + SE_DMA_TX_IRQ_STAT);
+ dm_rx_st = readl_relaxed(base + SE_DMA_RX_IRQ_STAT);
+ dma = readl_relaxed(base + SE_GENI_DMA_MODE_EN);
cur = gi2c->cur;
if (!cur ||
@@ -238,26 +242,17 @@
/* Disable the TX Watermark interrupt to stop TX */
if (!dma)
- writel_relaxed(0, gi2c->se.base +
- SE_GENI_TX_WATERMARK_REG);
- goto irqret;
- }
-
- if (dma) {
+ writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
+ } else if (dma) {
dev_dbg(gi2c->se.dev, "i2c dma tx:0x%x, dma rx:0x%x\n",
dm_tx_st, dm_rx_st);
- goto irqret;
- }
-
- if (cur->flags & I2C_M_RD &&
- m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
+ } else if (cur->flags & I2C_M_RD &&
+ m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
u32 rxcnt = rx_st & RX_FIFO_WC_MSK;
for (j = 0; j < rxcnt; j++) {
- u32 val;
- int p = 0;
-
- val = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFOn);
+ p = 0;
+ val = readl_relaxed(base + SE_GENI_RX_FIFOn);
while (gi2c->cur_rd < cur->len && p < sizeof(val)) {
cur->buf[gi2c->cur_rd++] = val & 0xff;
val >>= 8;
@@ -270,44 +265,39 @@
m_stat & M_TX_FIFO_WATERMARK_EN) {
for (j = 0; j < gi2c->tx_wm; j++) {
u32 temp;
- u32 val = 0;
- int p = 0;
+ val = 0;
+ p = 0;
while (gi2c->cur_wr < cur->len && p < sizeof(val)) {
temp = cur->buf[gi2c->cur_wr++];
val |= temp << (p * 8);
p++;
}
- writel_relaxed(val, gi2c->se.base + SE_GENI_TX_FIFOn);
+ writel_relaxed(val, base + SE_GENI_TX_FIFOn);
/* TX Complete, Disable the TX Watermark interrupt */
if (gi2c->cur_wr == cur->len) {
- writel_relaxed(0, gi2c->se.base +
- SE_GENI_TX_WATERMARK_REG);
+ writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
break;
}
}
}
-irqret:
+
if (m_stat)
- writel_relaxed(m_stat, gi2c->se.base + SE_GENI_M_IRQ_CLEAR);
+ writel_relaxed(m_stat, base + SE_GENI_M_IRQ_CLEAR);
- if (dma) {
- if (dm_tx_st)
- writel_relaxed(dm_tx_st, gi2c->se.base +
- SE_DMA_TX_IRQ_CLR);
- if (dm_rx_st)
- writel_relaxed(dm_rx_st, gi2c->se.base +
- SE_DMA_RX_IRQ_CLR);
- }
+ if (dma && dm_tx_st)
+ writel_relaxed(dm_tx_st, base + SE_DMA_TX_IRQ_CLR);
+ if (dma && dm_rx_st)
+ writel_relaxed(dm_rx_st, 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)
- complete(&gi2c->done);
- else if (dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE)
- complete(&gi2c->done);
- else if (dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
+ if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN ||
+ dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE ||
+ dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
complete(&gi2c->done);
- spin_unlock_irqrestore(&gi2c->lock, flags);
+ spin_unlock(&gi2c->lock);
+
return IRQ_HANDLED;
}
@@ -361,92 +351,112 @@
dev_err(gi2c->se.dev, "Timeout resetting TX_FSM\n");
}
+static void geni_i2c_rx_msg_cleanup(struct geni_i2c_dev *gi2c,
+ struct i2c_msg *cur)
+{
+ gi2c->cur_rd = 0;
+ if (gi2c->dma_buf) {
+ if (gi2c->err)
+ geni_i2c_rx_fsm_rst(gi2c);
+ geni_se_rx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len);
+ i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err);
+ }
+}
+
+static void geni_i2c_tx_msg_cleanup(struct geni_i2c_dev *gi2c,
+ struct i2c_msg *cur)
+{
+ gi2c->cur_wr = 0;
+ if (gi2c->dma_buf) {
+ if (gi2c->err)
+ geni_i2c_tx_fsm_rst(gi2c);
+ geni_se_tx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len);
+ i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err);
+ }
+}
+
static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
u32 m_param)
{
- dma_addr_t rx_dma;
- enum geni_se_xfer_mode mode;
- unsigned long time_left = XFER_TIMEOUT;
- void *dma_buf;
+ dma_addr_t rx_dma = 0;
+ unsigned long time_left;
+ void *dma_buf = NULL;
+ struct geni_se *se = &gi2c->se;
+ size_t len = msg->len;
+ struct i2c_msg *cur;
- gi2c->cur = msg;
- mode = GENI_SE_FIFO;
- dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+ if (!of_machine_is_compatible("lenovo,yoga-c630"))
+ dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+
if (dma_buf)
- mode = GENI_SE_DMA;
+ geni_se_select_mode(se, GENI_SE_DMA);
+ else
+ geni_se_select_mode(se, GENI_SE_FIFO);
- geni_se_select_mode(&gi2c->se, mode);
- writel_relaxed(msg->len, gi2c->se.base + SE_I2C_RX_TRANS_LEN);
- geni_se_setup_m_cmd(&gi2c->se, I2C_READ, m_param);
- if (mode == GENI_SE_DMA) {
- int ret;
+ writel_relaxed(len, se->base + SE_I2C_RX_TRANS_LEN);
+ geni_se_setup_m_cmd(se, I2C_READ, m_param);
- ret = geni_se_rx_dma_prep(&gi2c->se, dma_buf, msg->len,
- &rx_dma);
- if (ret) {
- mode = GENI_SE_FIFO;
- geni_se_select_mode(&gi2c->se, mode);
- i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
- }
+ if (dma_buf && geni_se_rx_dma_prep(se, dma_buf, len, &rx_dma)) {
+ geni_se_select_mode(se, GENI_SE_FIFO);
+ i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
+ dma_buf = NULL;
+ } else {
+ gi2c->xfer_len = len;
+ gi2c->dma_addr = rx_dma;
+ gi2c->dma_buf = dma_buf;
}
+ cur = gi2c->cur;
time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
if (!time_left)
geni_i2c_abort_xfer(gi2c);
- gi2c->cur_rd = 0;
- if (mode == GENI_SE_DMA) {
- if (gi2c->err)
- geni_i2c_rx_fsm_rst(gi2c);
- geni_se_rx_dma_unprep(&gi2c->se, rx_dma, msg->len);
- i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
- }
+ geni_i2c_rx_msg_cleanup(gi2c, cur);
+
return gi2c->err;
}
static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
u32 m_param)
{
- dma_addr_t tx_dma;
- enum geni_se_xfer_mode mode;
+ dma_addr_t tx_dma = 0;
unsigned long time_left;
- void *dma_buf;
+ void *dma_buf = NULL;
+ struct geni_se *se = &gi2c->se;
+ size_t len = msg->len;
+ struct i2c_msg *cur;
- gi2c->cur = msg;
- mode = GENI_SE_FIFO;
- dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+ if (!of_machine_is_compatible("lenovo,yoga-c630"))
+ dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+
if (dma_buf)
- mode = GENI_SE_DMA;
+ geni_se_select_mode(se, GENI_SE_DMA);
+ else
+ geni_se_select_mode(se, GENI_SE_FIFO);
- geni_se_select_mode(&gi2c->se, mode);
- writel_relaxed(msg->len, gi2c->se.base + SE_I2C_TX_TRANS_LEN);
- geni_se_setup_m_cmd(&gi2c->se, I2C_WRITE, m_param);
- if (mode == GENI_SE_DMA) {
- int ret;
+ writel_relaxed(len, se->base + SE_I2C_TX_TRANS_LEN);
+ geni_se_setup_m_cmd(se, I2C_WRITE, m_param);
- ret = geni_se_tx_dma_prep(&gi2c->se, dma_buf, msg->len,
- &tx_dma);
- if (ret) {
- mode = GENI_SE_FIFO;
- geni_se_select_mode(&gi2c->se, mode);
- i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
- }
+ if (dma_buf && geni_se_tx_dma_prep(se, dma_buf, len, &tx_dma)) {
+ geni_se_select_mode(se, GENI_SE_FIFO);
+ i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
+ dma_buf = NULL;
+ } else {
+ gi2c->xfer_len = len;
+ gi2c->dma_addr = tx_dma;
+ gi2c->dma_buf = dma_buf;
}
- if (mode == GENI_SE_FIFO) /* Get FIFO IRQ */
- writel_relaxed(1, gi2c->se.base + SE_GENI_TX_WATERMARK_REG);
+ if (!dma_buf) /* Get FIFO IRQ */
+ writel_relaxed(1, se->base + SE_GENI_TX_WATERMARK_REG);
+ cur = gi2c->cur;
time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
if (!time_left)
geni_i2c_abort_xfer(gi2c);
- gi2c->cur_wr = 0;
- if (mode == GENI_SE_DMA) {
- if (gi2c->err)
- geni_i2c_tx_fsm_rst(gi2c);
- geni_se_tx_dma_unprep(&gi2c->se, tx_dma, msg->len);
- i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
- }
+ geni_i2c_tx_msg_cleanup(gi2c, cur);
+
return gi2c->err;
}
@@ -474,6 +484,7 @@
m_param |= ((msgs[i].addr << SLV_ADDR_SHFT) & SLV_ADDR_MSK);
+ gi2c->cur = &msgs[i];
if (msgs[i].flags & I2C_M_RD)
ret = geni_i2c_rx_one_msg(gi2c, &msgs[i], m_param);
else
@@ -502,48 +513,54 @@
.functionality = geni_i2c_func,
};
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id geni_i2c_acpi_match[] = {
+ { "QCOM0220"},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, geni_i2c_acpi_match);
+#endif
+
static int geni_i2c_probe(struct platform_device *pdev)
{
struct geni_i2c_dev *gi2c;
struct resource *res;
u32 proto, tx_depth;
int ret;
+ struct device *dev = &pdev->dev;
- gi2c = devm_kzalloc(&pdev->dev, sizeof(*gi2c), GFP_KERNEL);
+ gi2c = devm_kzalloc(dev, sizeof(*gi2c), GFP_KERNEL);
if (!gi2c)
return -ENOMEM;
- gi2c->se.dev = &pdev->dev;
- gi2c->se.wrapper = dev_get_drvdata(pdev->dev.parent);
+ gi2c->se.dev = dev;
+ gi2c->se.wrapper = dev_get_drvdata(dev->parent);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- gi2c->se.base = devm_ioremap_resource(&pdev->dev, res);
+ gi2c->se.base = devm_ioremap_resource(dev, res);
if (IS_ERR(gi2c->se.base))
return PTR_ERR(gi2c->se.base);
- gi2c->se.clk = devm_clk_get(&pdev->dev, "se");
- if (IS_ERR(gi2c->se.clk)) {
- ret = PTR_ERR(gi2c->se.clk);
- dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
- return ret;
- }
+ gi2c->se.clk = devm_clk_get(dev, "se");
+ if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(dev))
+ return PTR_ERR(gi2c->se.clk);
- ret = device_property_read_u32(&pdev->dev, "clock-frequency",
- &gi2c->clk_freq_out);
+ ret = device_property_read_u32(dev, "clock-frequency",
+ &gi2c->clk_freq_out);
if (ret) {
- dev_info(&pdev->dev,
- "Bus frequency not specified, default to 100kHz.\n");
+ dev_info(dev, "Bus frequency not specified, default to 100kHz.\n");
gi2c->clk_freq_out = KHZ(100);
}
+ if (has_acpi_companion(dev))
+ ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(dev));
+
gi2c->irq = platform_get_irq(pdev, 0);
- if (gi2c->irq < 0) {
- dev_err(&pdev->dev, "IRQ error for i2c-geni\n");
+ if (gi2c->irq < 0)
return gi2c->irq;
- }
ret = geni_i2c_clk_map_idx(gi2c);
if (ret) {
- dev_err(&pdev->dev, "Invalid clk frequency %d Hz: %d\n",
+ dev_err(dev, "Invalid clk frequency %d Hz: %d\n",
gi2c->clk_freq_out, ret);
return ret;
}
@@ -552,29 +569,45 @@
init_completion(&gi2c->done);
spin_lock_init(&gi2c->lock);
platform_set_drvdata(pdev, gi2c);
- ret = devm_request_irq(&pdev->dev, gi2c->irq, geni_i2c_irq,
- IRQF_TRIGGER_HIGH, "i2c_geni", gi2c);
+ ret = devm_request_irq(dev, gi2c->irq, geni_i2c_irq, 0,
+ dev_name(dev), gi2c);
if (ret) {
- dev_err(&pdev->dev, "Request_irq failed:%d: err:%d\n",
+ dev_err(dev, "Request_irq failed:%d: err:%d\n",
gi2c->irq, ret);
return ret;
}
/* Disable the interrupt so that the system can enter low-power mode */
disable_irq(gi2c->irq);
i2c_set_adapdata(&gi2c->adap, gi2c);
- gi2c->adap.dev.parent = &pdev->dev;
- gi2c->adap.dev.of_node = pdev->dev.of_node;
+ gi2c->adap.dev.parent = dev;
+ gi2c->adap.dev.of_node = dev->of_node;
strlcpy(gi2c->adap.name, "Geni-I2C", sizeof(gi2c->adap.name));
+
+ ret = geni_icc_get(&gi2c->se, "qup-memory");
+ if (ret)
+ return ret;
+ /*
+ * Set the bus quota for core and cpu to a reasonable value for
+ * register access.
+ * Set quota for DDR based on bus speed.
+ */
+ gi2c->se.icc_paths[GENI_TO_CORE].avg_bw = GENI_DEFAULT_BW;
+ gi2c->se.icc_paths[CPU_TO_GENI].avg_bw = GENI_DEFAULT_BW;
+ gi2c->se.icc_paths[GENI_TO_DDR].avg_bw = Bps_to_icc(gi2c->clk_freq_out);
+
+ ret = geni_icc_set_bw(&gi2c->se);
+ if (ret)
+ return ret;
ret = geni_se_resources_on(&gi2c->se);
if (ret) {
- dev_err(&pdev->dev, "Error turning on resources %d\n", ret);
+ dev_err(dev, "Error turning on resources %d\n", ret);
return ret;
}
proto = geni_se_read_proto(&gi2c->se);
tx_depth = geni_se_get_tx_fifo_depth(&gi2c->se);
if (proto != GENI_SE_I2C) {
- dev_err(&pdev->dev, "Invalid proto %d\n", proto);
+ dev_err(dev, "Invalid proto %d\n", proto);
geni_se_resources_off(&gi2c->se);
return -ENXIO;
}
@@ -584,11 +617,15 @@
true, true, true);
ret = geni_se_resources_off(&gi2c->se);
if (ret) {
- dev_err(&pdev->dev, "Error turning off resources %d\n", ret);
+ dev_err(dev, "Error turning off resources %d\n", ret);
return ret;
}
- dev_dbg(&pdev->dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
+ ret = geni_icc_disable(&gi2c->se);
+ if (ret)
+ return ret;
+
+ dev_dbg(dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
gi2c->suspended = 1;
pm_runtime_set_suspended(gi2c->se.dev);
@@ -598,10 +635,12 @@
ret = i2c_add_adapter(&gi2c->adap);
if (ret) {
- dev_err(&pdev->dev, "Error adding i2c adapter %d\n", ret);
+ dev_err(dev, "Error adding i2c adapter %d\n", ret);
pm_runtime_disable(gi2c->se.dev);
return ret;
}
+
+ dev_dbg(dev, "Geni-I2C adaptor successfully added\n");
return 0;
}
@@ -613,6 +652,14 @@
i2c_del_adapter(&gi2c->adap);
pm_runtime_disable(gi2c->se.dev);
return 0;
+}
+
+static void geni_i2c_shutdown(struct platform_device *pdev)
+{
+ struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
+
+ /* Make client i2c transfers start failing */
+ i2c_mark_adapter_suspended(&gi2c->adap);
}
static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev)
@@ -630,13 +677,17 @@
gi2c->suspended = 1;
}
- return 0;
+ return geni_icc_disable(&gi2c->se);
}
static int __maybe_unused geni_i2c_runtime_resume(struct device *dev)
{
int ret;
struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
+
+ ret = geni_icc_enable(&gi2c->se);
+ if (ret)
+ return ret;
ret = geni_se_resources_on(&gi2c->se);
if (ret)
@@ -651,6 +702,8 @@
{
struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
+ i2c_mark_adapter_suspended(&gi2c->adap);
+
if (!gi2c->suspended) {
geni_i2c_runtime_suspend(dev);
pm_runtime_disable(dev);
@@ -660,8 +713,16 @@
return 0;
}
+static int __maybe_unused geni_i2c_resume_noirq(struct device *dev)
+{
+ struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
+
+ i2c_mark_adapter_resumed(&gi2c->adap);
+ return 0;
+}
+
static const struct dev_pm_ops geni_i2c_pm_ops = {
- SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, NULL)
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, geni_i2c_resume_noirq)
SET_RUNTIME_PM_OPS(geni_i2c_runtime_suspend, geni_i2c_runtime_resume,
NULL)
};
@@ -675,10 +736,12 @@
static struct platform_driver geni_i2c_driver = {
.probe = geni_i2c_probe,
.remove = geni_i2c_remove,
+ .shutdown = geni_i2c_shutdown,
.driver = {
.name = "geni_i2c",
.pm = &geni_i2c_pm_ops,
.of_match_table = geni_i2c_dt_match,
+ .acpi_match_table = ACPI_PTR(geni_i2c_acpi_match),
},
};
--
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