lkml.org 
[lkml]   [2020]   [Jan]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 02/10] platform/x86: intel_scu_ipc: Add constants for register offsets
Date
This makes the code more readable. These are taken from intel_pmc_ipc.c
which implements the same thing.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/platform/x86/intel_scu_ipc.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index e330ec73c465..a9b6decbb367 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -97,12 +97,14 @@ static struct intel_scu_ipc_dev ipcdev; /* Only one for now */

#define IPC_STATUS 0x04
#define IPC_STATUS_IRQ BIT(2)
+#define IPC_STATUS_ERR BIT(1)
+#define IPC_STATUS_BUSY BIT(0)

/*
- * IPC Read Buffer (Read Only):
- * 16 byte buffer for receiving data from SCU, if IPC command
- * processing results in response data
+ * IPC Write/Read Buffers:
+ * 16 byte buffer for sending and receiving data to and from SCU.
*/
+#define IPC_WRITE_BUFFER 0x80
#define IPC_READ_BUFFER 0x90

#define IPC_I2C_CNTRL_ADDR 0
@@ -131,7 +133,7 @@ static inline void ipc_command(struct intel_scu_ipc_dev *scu, u32 cmd)
*/
static inline void ipc_data_writel(struct intel_scu_ipc_dev *scu, u32 data, u32 offset)
{
- writel(data, scu->ipc_base + 0x80 + offset);
+ writel(data, scu->ipc_base + IPC_WRITE_BUFFER + offset);
}

/*
@@ -143,7 +145,7 @@ static inline void ipc_data_writel(struct intel_scu_ipc_dev *scu, u32 data, u32
*/
static inline u8 ipc_read_status(struct intel_scu_ipc_dev *scu)
{
- return __raw_readl(scu->ipc_base + 0x04);
+ return __raw_readl(scu->ipc_base + IPC_STATUS);
}

/* Read ipc byte data */
@@ -165,17 +167,17 @@ static inline int busy_loop(struct intel_scu_ipc_dev *scu)
u32 loop_count = 100000;

/* break if scu doesn't reset busy bit after huge retry */
- while ((status & BIT(0)) && --loop_count) {
+ while ((status & IPC_STATUS_BUSY) && --loop_count) {
udelay(1); /* scu processing time is in few u secods */
status = ipc_read_status(scu);
}

- if (status & BIT(0)) {
+ if (status & IPC_STATUS_BUSY) {
dev_err(scu->dev, "IPC timed out");
return -ETIMEDOUT;
}

- if (status & BIT(1))
+ if (status & IPC_STATUS_ERR)
return -EIO;

return 0;
@@ -192,7 +194,7 @@ static inline int ipc_wait_for_interrupt(struct intel_scu_ipc_dev *scu)
}

status = ipc_read_status(scu);
- if (status & BIT(1))
+ if (status & IPC_STATUS_ERR)
return -EIO;

return 0;
--
2.24.1
\
 
 \ /
  Last update: 2020-01-22 17:29    [W:0.081 / U:0.664 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site