intel_scu_ipc: Propagate pointer to struct intel_scu_ipc_dev

As much as possible propagate a pointer to struct intel_scu_ipc_dev.

There is no functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index 7148535b216a17193cd1712cb8aa8539da43cdae..6c9367fe569c2f8e9872b4b436192950d0058516 100644 (file)
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -118,28 +118,30 @@ static struct intel_scu_ipc_dev  ipcdev; /* Only one for now */
 static DEFINE_MUTEX(ipclock); /* lock used to prevent multiple call to SCU */
 
 /*
+ * Send ipc command
  * Command Register (Write Only):
  * A write to this register results in an interrupt to the SCU core processor
  * Format:
  * |rfu2(8) | size(8) | command id(4) | rfu1(3) | ioc(1) | command(8)|
  */
-static inline void ipc_command(u32 cmd) /* Send ipc command */
+static inline void ipc_command(struct intel_scu_ipc_dev *scu, u32 cmd)
 {
-       if (ipcdev.irq_mode) {
-               reinit_completion(&ipcdev.cmd_complete);
-               writel(cmd | IPC_IOC, ipcdev.ipc_base);
+       if (scu->irq_mode) {
+               reinit_completion(&scu->cmd_complete);
+               writel(cmd | IPC_IOC, scu->ipc_base);
        }
-       writel(cmd, ipcdev.ipc_base);
+       writel(cmd, scu->ipc_base);
 }
 
 /*
+ * Write ipc data
  * IPC Write Buffer (Write Only):
  * 16-byte buffer for sending data associated with IPC command to
  * SCU. Size of the data is specified in the IPC_COMMAND_REG register
  */
-static inline void ipc_data_writel(u32 data, u32 offset) /* Write ipc data */
+static inline void ipc_data_writel(struct intel_scu_ipc_dev *scu, u32 data, u32 offset)
 {
-       writel(data, ipcdev.ipc_base + 0x80 + offset);
+       writel(data, scu->ipc_base + 0x80 + offset);
 }
 
 /*
@@ -149,35 +151,37 @@ static inline void ipc_data_writel(u32 data, u32 offset) /* Write ipc data */
  * Format:
  * |rfu3(8)|error code(8)|initiator id(8)|cmd id(4)|rfu1(2)|error(1)|busy(1)|
  */
-static inline u8 ipc_read_status(void)
+static inline u8 ipc_read_status(struct intel_scu_ipc_dev *scu)
 {
-       return __raw_readl(ipcdev.ipc_base + 0x04);
+       return __raw_readl(scu->ipc_base + 0x04);
 }
 
-static inline u8 ipc_data_readb(u32 offset) /* Read ipc byte data */
+/* Read ipc byte data */
+static inline u8 ipc_data_readb(struct intel_scu_ipc_dev *scu, u32 offset)
 {
-       return readb(ipcdev.ipc_base + IPC_READ_BUFFER + offset);
+       return readb(scu->ipc_base + IPC_READ_BUFFER + offset);
 }
 
-static inline u32 ipc_data_readl(u32 offset) /* Read ipc u32 data */
+/* Read ipc u32 data */
+static inline u32 ipc_data_readl(struct intel_scu_ipc_dev *scu, u32 offset)
 {
-       return readl(ipcdev.ipc_base + IPC_READ_BUFFER + offset);
+       return readl(scu->ipc_base + IPC_READ_BUFFER + offset);
 }
 
 /* Wait till scu status is busy */
-static inline int busy_loop(void)
+static inline int busy_loop(struct intel_scu_ipc_dev *scu)
 {
-       u32 status = ipc_read_status();
+       u32 status = ipc_read_status(scu);
        u32 loop_count = 100000;
 
        /* break if scu doesn't reset busy bit after huge retry */
        while ((status & BIT(0)) && --loop_count) {
                udelay(1); /* scu processing time is in few u secods */
-               status = ipc_read_status();
+               status = ipc_read_status(scu);
        }
 
        if (status & BIT(0)) {
-               dev_err(&ipcdev.pdev->dev, "IPC timed out");
+               dev_err(&scu->pdev->dev, "IPC timed out");
                return -ETIMEDOUT;
        }
 
@@ -188,31 +192,32 @@ static inline int busy_loop(void)
 }
 
 /* Wait till ipc ioc interrupt is received or timeout in 3 HZ */
-static inline int ipc_wait_for_interrupt(void)
+static inline int ipc_wait_for_interrupt(struct intel_scu_ipc_dev *scu)
 {
        int status;
 
-       if (!wait_for_completion_timeout(&ipcdev.cmd_complete, 3 * HZ)) {
-               struct device *dev = &ipcdev.pdev->dev;
+       if (!wait_for_completion_timeout(&scu->cmd_complete, 3 * HZ)) {
+               struct device *dev = &scu->pdev->dev;
                dev_err(dev, "IPC timed out\n");
                return -ETIMEDOUT;
        }
 
-       status = ipc_read_status();
+       status = ipc_read_status(scu);
        if (status & BIT(1))
                return -EIO;
 
        return 0;
 }
 
-static int intel_scu_ipc_check_status(void)
+static int intel_scu_ipc_check_status(struct intel_scu_ipc_dev *scu)
 {
-       return ipcdev.irq_mode ? ipc_wait_for_interrupt() : busy_loop();
+       return scu->irq_mode ? ipc_wait_for_interrupt(scu) : busy_loop(scu);
 }
 
 /* Read/Write power control(PMIC in Langwell, MSIC in PenWell) registers */
 static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id)
 {
+       struct intel_scu_ipc_dev *scu = &ipcdev;
        int nc;
        u32 offset = 0;
        int err;
@@ -223,7 +228,7 @@ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id)
 
        mutex_lock(&ipclock);
 
-       if (ipcdev.pdev == NULL) {
+       if (scu->pdev == NULL) {
                mutex_unlock(&ipclock);
                return -ENODEV;
        }
@@ -235,27 +240,27 @@ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id)
 
        if (id == IPC_CMD_PCNTRL_R) {
                for (nc = 0, offset = 0; nc < count; nc++, offset += 4)
-                       ipc_data_writel(wbuf[nc], offset);
-               ipc_command((count * 2) << 16 | id << 12 | 0 << 8 | op);
+                       ipc_data_writel(scu, wbuf[nc], offset);
+               ipc_command(scu, (count * 2) << 16 | id << 12 | 0 << 8 | op);
        } else if (id == IPC_CMD_PCNTRL_W) {
                for (nc = 0; nc < count; nc++, offset += 1)
                        cbuf[offset] = data[nc];
                for (nc = 0, offset = 0; nc < count; nc++, offset += 4)
-                       ipc_data_writel(wbuf[nc], offset);
-               ipc_command((count * 3) << 16 | id << 12 | 0 << 8 | op);
+                       ipc_data_writel(scu, wbuf[nc], offset);
+               ipc_command(scu, (count * 3) << 16 | id << 12 | 0 << 8 | op);
        } else if (id == IPC_CMD_PCNTRL_M) {
                cbuf[offset] = data[0];
                cbuf[offset + 1] = data[1];
-               ipc_data_writel(wbuf[0], 0); /* Write wbuff */
-               ipc_command(4 << 16 | id << 12 | 0 << 8 | op);
+               ipc_data_writel(scu, wbuf[0], 0); /* Write wbuff */
+               ipc_command(scu, 4 << 16 | id << 12 | 0 << 8 | op);
        }
 
-       err = intel_scu_ipc_check_status();
+       err = intel_scu_ipc_check_status(scu);
        if (!err && id == IPC_CMD_PCNTRL_R) { /* Read rbuf */
                /* Workaround: values are read as 0 without memcpy_fromio */
-               memcpy_fromio(cbuf, ipcdev.ipc_base + 0x90, 16);
+               memcpy_fromio(cbuf, scu->ipc_base + 0x90, 16);
                for (nc = 0; nc < count; nc++)
-                       data[nc] = ipc_data_readb(nc);
+                       data[nc] = ipc_data_readb(scu, nc);
        }
        mutex_unlock(&ipclock);
        return err;
@@ -436,15 +441,16 @@ EXPORT_SYMBOL(intel_scu_ipc_update_register);
  */
 int intel_scu_ipc_simple_command(int cmd, int sub)
 {
+       struct intel_scu_ipc_dev *scu = &ipcdev;
        int err;
 
        mutex_lock(&ipclock);
-       if (ipcdev.pdev == NULL) {
+       if (scu->pdev == NULL) {
                mutex_unlock(&ipclock);
                return -ENODEV;
        }
-       ipc_command(sub << 12 | cmd);
-       err = intel_scu_ipc_check_status();
+       ipc_command(scu, sub << 12 | cmd);
+       err = intel_scu_ipc_check_status(scu);
        mutex_unlock(&ipclock);
        return err;
 }
@@ -465,23 +471,24 @@ EXPORT_SYMBOL(intel_scu_ipc_simple_command);
 int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
                          u32 *out, int outlen)
 {
+       struct intel_scu_ipc_dev *scu = &ipcdev;
        int i, err;
 
        mutex_lock(&ipclock);
-       if (ipcdev.pdev == NULL) {
+       if (scu->pdev == NULL) {
                mutex_unlock(&ipclock);
                return -ENODEV;
        }
 
        for (i = 0; i < inlen; i++)
-               ipc_data_writel(*in++, 4 * i);
+               ipc_data_writel(scu, *in++, 4 * i);
 
-       ipc_command((inlen << 16) | (sub << 12) | cmd);
-       err = intel_scu_ipc_check_status();
+       ipc_command(scu, (inlen << 16) | (sub << 12) | cmd);
+       err = intel_scu_ipc_check_status(scu);
 
        if (!err) {
                for (i = 0; i < outlen; i++)
-                       *out++ = ipc_data_readl(4 * i);
+                       *out++ = ipc_data_readl(scu, 4 * i);
        }
 
        mutex_unlock(&ipclock);
@@ -507,25 +514,26 @@ EXPORT_SYMBOL(intel_scu_ipc_command);
  */
 int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data)
 {
+       struct intel_scu_ipc_dev *scu = &ipcdev;
        u32 cmd = 0;
 
        mutex_lock(&ipclock);
-       if (ipcdev.pdev == NULL) {
+       if (scu->pdev == NULL) {
                mutex_unlock(&ipclock);
                return -ENODEV;
        }
        cmd = (addr >> 24) & 0xFF;
        if (cmd == IPC_I2C_READ) {
-               writel(addr, ipcdev.i2c_base + IPC_I2C_CNTRL_ADDR);
+               writel(addr, scu->i2c_base + IPC_I2C_CNTRL_ADDR);
                /* Write not getting updated without delay */
                mdelay(1);
-               *data = readl(ipcdev.i2c_base + I2C_DATA_ADDR);
+               *data = readl(scu->i2c_base + I2C_DATA_ADDR);
        } else if (cmd == IPC_I2C_WRITE) {
-               writel(*data, ipcdev.i2c_base + I2C_DATA_ADDR);
+               writel(*data, scu->i2c_base + I2C_DATA_ADDR);
                mdelay(1);
-               writel(addr, ipcdev.i2c_base + IPC_I2C_CNTRL_ADDR);
+               writel(addr, scu->i2c_base + IPC_I2C_CNTRL_ADDR);
        } else {
-               dev_err(&ipcdev.pdev->dev,
+               dev_err(&scu->pdev->dev,
                        "intel_scu_ipc: I2C INVALID_CMD = 0x%x\n", cmd);
 
                mutex_unlock(&ipclock);
@@ -545,8 +553,10 @@ EXPORT_SYMBOL(intel_scu_ipc_i2c_cntrl);
  */
 static irqreturn_t ioc(int irq, void *dev_id)
 {
-       if (ipcdev.irq_mode)
-               complete(&ipcdev.cmd_complete);
+       struct intel_scu_ipc_dev *scu = dev_id;
+
+       if (scu->irq_mode)
+               complete(&scu->cmd_complete);
 
        return IRQ_HANDLED;
 }
@@ -562,15 +572,16 @@ static irqreturn_t ioc(int irq, void *dev_id)
 static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
        int err;
+       struct intel_scu_ipc_dev *scu = &ipcdev;
        struct intel_scu_ipc_pdata_t *pdata;
 
-       if (ipcdev.pdev)                /* We support only one SCU */
+       if (scu->pdev)          /* We support only one SCU */
                return -EBUSY;
 
        pdata = (struct intel_scu_ipc_pdata_t *)id->driver_data;
 
-       ipcdev.pdev = pci_dev_get(dev);
-       ipcdev.irq_mode = pdata->irq_mode;
+       scu->pdev = pci_dev_get(dev);
+       scu->irq_mode = pdata->irq_mode;
 
        err = pcim_enable_device(dev);
        if (err)
@@ -580,21 +591,22 @@ static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
        if (err)
                return err;
 
-       init_completion(&ipcdev.cmd_complete);
+       init_completion(&scu->cmd_complete);
 
        err = devm_request_irq(&dev->dev, dev->irq, ioc, 0, "intel_scu_ipc",
-                              &ipcdev);
+                              scu);
        if (err)
                return err;
 
-       ipcdev.ipc_base = pcim_iomap_table(dev)[0];
+       scu->ipc_base = pcim_iomap_table(dev)[0];
 
-       ipcdev.i2c_base = ioremap_nocache(pdata->i2c_base, pdata->i2c_len);
-       if (!ipcdev.i2c_base)
+       scu->i2c_base = ioremap_nocache(pdata->i2c_base, pdata->i2c_len);
+       if (!scu->i2c_base)
                return -ENOMEM;
 
        intel_scu_devices_create();
 
+       pci_set_drvdata(dev, scu);
        return 0;
 }
 
@@ -610,9 +622,11 @@ static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
  */
 static void ipc_remove(struct pci_dev *pdev)
 {
-       pci_dev_put(ipcdev.pdev);
-       iounmap(ipcdev.i2c_base);
-       ipcdev.pdev = NULL;
+       struct intel_scu_ipc_dev *scu = pci_get_drvdata(pdev);
+
+       pci_dev_put(scu->pdev);
+       scu->pdev = NULL;
+       iounmap(scu->i2c_base);
        intel_scu_devices_destroy();
 }