diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0004-Test-code-for-LPC-MBOX.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0004-Test-code-for-LPC-MBOX.patch | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0004-Test-code-for-LPC-MBOX.patch b/meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0004-Test-code-for-LPC-MBOX.patch new file mode 100644 index 000000000..dbb163d20 --- /dev/null +++ b/meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0004-Test-code-for-LPC-MBOX.patch @@ -0,0 +1,112 @@ +From 2f3587cf9e44f261fe74413ef6a54467686c910b Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +Date: Tue, 20 Nov 2018 15:49:15 -0800 +Subject: [PATCH] Test code for LPC MBOX + +Blocked interrupt driven code for test. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +--- + drivers/misc/aspeed-lpc-mbox.c | 21 ++++++++++++++++++++- + 1 file changed, 20 insertions(+), 1 deletion(-) + +diff --git a/drivers/misc/aspeed-lpc-mbox.c b/drivers/misc/aspeed-lpc-mbox.c +index 0f0c711bafee..0933e0553953 100644 +--- a/drivers/misc/aspeed-lpc-mbox.c ++++ b/drivers/misc/aspeed-lpc-mbox.c +@@ -19,6 +19,8 @@ + + #define DEVICE_NAME "aspeed-mbox" + ++#define MBX_USE_INTERRUPT 0 ++ + #define ASPEED_MBOX_NUM_REGS 16 + + #define ASPEED_MBOX_DATA_0 0x00 +@@ -79,12 +81,14 @@ static int aspeed_mbox_open(struct inode *inode, struct file *file) + struct aspeed_mbox *mbox = file_mbox(file); + + if (atomic_inc_return(&aspeed_mbox_open_count) == 1) { ++#if MBX_USE_INTERRUPT + /* + * Clear the interrupt status bit if it was left on and unmask + * interrupts. + * ASPEED_MBOX_CTRL_RECV bit is W1C, this also unmasks in 1 step + */ + aspeed_mbox_outb(mbox, ASPEED_MBOX_CTRL_RECV, ASPEED_MBOX_BMC_CTRL); ++#endif + return 0; + } + +@@ -106,6 +110,7 @@ static ssize_t aspeed_mbox_read(struct file *file, char __user *buf, + if (count + *ppos > ASPEED_MBOX_NUM_REGS) + return -EINVAL; + ++#if MBX_USE_INTERRUPT + if (file->f_flags & O_NONBLOCK) { + if (!(aspeed_mbox_inb(mbox, ASPEED_MBOX_BMC_CTRL) & + ASPEED_MBOX_CTRL_RECV)) +@@ -115,6 +120,7 @@ static ssize_t aspeed_mbox_read(struct file *file, char __user *buf, + ASPEED_MBOX_CTRL_RECV)) { + return -ERESTARTSYS; + } ++#endif + + mutex_lock(&mbox->mutex); + +@@ -129,8 +135,10 @@ static ssize_t aspeed_mbox_read(struct file *file, char __user *buf, + count--; + } + ++#if MBX_USE_INTERRUPT + /* ASPEED_MBOX_CTRL_RECV bit is write to clear, this also unmasks in 1 step */ + aspeed_mbox_outb(mbox, ASPEED_MBOX_CTRL_RECV, ASPEED_MBOX_BMC_CTRL); ++#endif + ret = p - buf; + + out_unlock: +@@ -180,7 +188,9 @@ static unsigned int aspeed_mbox_poll(struct file *file, poll_table *wait) + + poll_wait(file, &mbox->queue, wait); + ++#if MBX_USE_INTERRUPT + if (aspeed_mbox_inb(mbox, ASPEED_MBOX_BMC_CTRL) & ASPEED_MBOX_CTRL_RECV) ++#endif + mask |= POLLIN; + + return mask; +@@ -206,6 +216,7 @@ static irqreturn_t aspeed_mbox_irq(int irq, void *arg) + { + struct aspeed_mbox *mbox = arg; + ++#if MBX_USE_INTERRUPT + if (!(aspeed_mbox_inb(mbox, ASPEED_MBOX_BMC_CTRL) & ASPEED_MBOX_CTRL_RECV)) + return IRQ_NONE; + +@@ -216,6 +227,7 @@ static irqreturn_t aspeed_mbox_irq(int irq, void *arg) + + /* Mask it off, we'll clear it when we the data gets read */ + aspeed_mbox_outb(mbox, ASPEED_MBOX_CTRL_MASK, ASPEED_MBOX_BMC_CTRL); ++#endif + + wake_up(&mbox->queue); + return IRQ_HANDLED; +@@ -248,7 +260,14 @@ static int aspeed_mbox_config_irq(struct aspeed_mbox *mbox, + aspeed_mbox_outb(mbox, 0xff, ASPEED_MBOX_STATUS_0); + aspeed_mbox_outb(mbox, 0xff, ASPEED_MBOX_STATUS_1); + +- aspeed_mbox_outb(mbox, ASPEED_MBOX_CTRL_RECV, ASPEED_MBOX_BMC_CTRL); ++ aspeed_mbox_outb(mbox, aspeed_mbox_inb(mbox, ASPEED_MBOX_BMC_CTRL) | ASPEED_MBOX_CTRL_MASK, ASPEED_MBOX_BMC_CTRL); ++ ++ /* ++ * Because mailbox data register init value is random, need to give a ++ * init value to mailbox data register. ++ */ ++ aspeed_mbox_outb(mbox, 0x00, ASPEED_MBOX_DATA_0); ++ + return 0; + } + +-- +2.7.4 + |