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Message-Id: <20220120080347.1595379-3-laurent@vivier.eu>
Date: Thu, 20 Jan 2022 09:03:44 +0100
From: Laurent Vivier <laurent@...ier.eu>
To: linux-kernel@...r.kernel.org
Cc: Alessandro Zummo <a.zummo@...ertech.it>, linux-rtc@...r.kernel.org,
John Stultz <john.stultz@...aro.org>,
Arnd Bergmann <arnd@...db.de>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
linux-m68k@...ts.linux-m68k.org,
Thomas Gleixner <tglx@...utronix.de>,
Stephen Boyd <sboyd@...nel.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Laurent Vivier <laurent@...ier.eu>
Subject: [PATCH v11 2/5] tty: goldfish: introduce gf_ioread32()/gf_iowrite32()
Revert
commit da31de35cd2f ("tty: goldfish: use __raw_writel()/__raw_readl()")
to use accessors defined by the architecture.
Define by default the accessor to be little-endian as we
have only little-endian architectures using goldfish devices.
Signed-off-by: Laurent Vivier <laurent@...ier.eu>
---
drivers/tty/goldfish.c | 20 ++++++++++----------
include/linux/goldfish.h | 15 +++++++++++----
2 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index 5ed19a9857ad..10c13b93ed52 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -61,13 +61,13 @@ static void do_rw_io(struct goldfish_tty *qtty,
spin_lock_irqsave(&qtty->lock, irq_flags);
gf_write_ptr((void *)address, base + GOLDFISH_TTY_REG_DATA_PTR,
base + GOLDFISH_TTY_REG_DATA_PTR_HIGH);
- __raw_writel(count, base + GOLDFISH_TTY_REG_DATA_LEN);
+ gf_iowrite32(count, base + GOLDFISH_TTY_REG_DATA_LEN);
if (is_write)
- __raw_writel(GOLDFISH_TTY_CMD_WRITE_BUFFER,
+ gf_iowrite32(GOLDFISH_TTY_CMD_WRITE_BUFFER,
base + GOLDFISH_TTY_REG_CMD);
else
- __raw_writel(GOLDFISH_TTY_CMD_READ_BUFFER,
+ gf_iowrite32(GOLDFISH_TTY_CMD_READ_BUFFER,
base + GOLDFISH_TTY_REG_CMD);
spin_unlock_irqrestore(&qtty->lock, irq_flags);
@@ -142,7 +142,7 @@ static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
unsigned char *buf;
u32 count;
- count = __raw_readl(base + GOLDFISH_TTY_REG_BYTES_READY);
+ count = gf_ioread32(base + GOLDFISH_TTY_REG_BYTES_READY);
if (count == 0)
return IRQ_NONE;
@@ -159,7 +159,7 @@ static int goldfish_tty_activate(struct tty_port *port, struct tty_struct *tty)
{
struct goldfish_tty *qtty = container_of(port, struct goldfish_tty,
port);
- __raw_writel(GOLDFISH_TTY_CMD_INT_ENABLE, qtty->base + GOLDFISH_TTY_REG_CMD);
+ gf_iowrite32(GOLDFISH_TTY_CMD_INT_ENABLE, qtty->base + GOLDFISH_TTY_REG_CMD);
return 0;
}
@@ -167,7 +167,7 @@ static void goldfish_tty_shutdown(struct tty_port *port)
{
struct goldfish_tty *qtty = container_of(port, struct goldfish_tty,
port);
- __raw_writel(GOLDFISH_TTY_CMD_INT_DISABLE, qtty->base + GOLDFISH_TTY_REG_CMD);
+ gf_iowrite32(GOLDFISH_TTY_CMD_INT_DISABLE, qtty->base + GOLDFISH_TTY_REG_CMD);
}
static int goldfish_tty_open(struct tty_struct *tty, struct file *filp)
@@ -202,7 +202,7 @@ static unsigned int goldfish_tty_chars_in_buffer(struct tty_struct *tty)
{
struct goldfish_tty *qtty = &goldfish_ttys[tty->index];
void __iomem *base = qtty->base;
- return __raw_readl(base + GOLDFISH_TTY_REG_BYTES_READY);
+ return gf_ioread32(base + GOLDFISH_TTY_REG_BYTES_READY);
}
static void goldfish_tty_console_write(struct console *co, const char *b,
@@ -355,7 +355,7 @@ static int goldfish_tty_probe(struct platform_device *pdev)
* on Ranchu emulator (qemu2) returns 1 here and
* driver will use physical addresses.
*/
- qtty->version = __raw_readl(base + GOLDFISH_TTY_REG_VERSION);
+ qtty->version = gf_ioread32(base + GOLDFISH_TTY_REG_VERSION);
/*
* Goldfish TTY device on Ranchu emulator (qemu2)
@@ -374,7 +374,7 @@ static int goldfish_tty_probe(struct platform_device *pdev)
}
}
- __raw_writel(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_REG_CMD);
+ gf_iowrite32(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_REG_CMD);
ret = request_irq(irq, goldfish_tty_interrupt, IRQF_SHARED,
"goldfish_tty", qtty);
@@ -436,7 +436,7 @@ static int goldfish_tty_remove(struct platform_device *pdev)
#ifdef CONFIG_GOLDFISH_TTY_EARLY_CONSOLE
static void gf_early_console_putchar(struct uart_port *port, int ch)
{
- __raw_writel(ch, port->membase);
+ gf_iowrite32(ch, port->membase);
}
static void gf_early_write(struct console *con, const char *s, unsigned int n)
diff --git a/include/linux/goldfish.h b/include/linux/goldfish.h
index 12be1601fd84..bcc17f95b906 100644
--- a/include/linux/goldfish.h
+++ b/include/linux/goldfish.h
@@ -8,14 +8,21 @@
/* Helpers for Goldfish virtual platform */
+#ifndef gf_ioread32
+#define gf_ioread32 ioread32
+#endif
+#ifndef gf_iowrite32
+#define gf_iowrite32 iowrite32
+#endif
+
static inline void gf_write_ptr(const void *ptr, void __iomem *portl,
void __iomem *porth)
{
const unsigned long addr = (unsigned long)ptr;
- __raw_writel(lower_32_bits(addr), portl);
+ gf_iowrite32(lower_32_bits(addr), portl);
#ifdef CONFIG_64BIT
- __raw_writel(upper_32_bits(addr), porth);
+ gf_iowrite32(upper_32_bits(addr), porth);
#endif
}
@@ -23,9 +30,9 @@ static inline void gf_write_dma_addr(const dma_addr_t addr,
void __iomem *portl,
void __iomem *porth)
{
- __raw_writel(lower_32_bits(addr), portl);
+ gf_iowrite32(lower_32_bits(addr), portl);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
- __raw_writel(upper_32_bits(addr), porth);
+ gf_iowrite32(upper_32_bits(addr), porth);
#endif
}
--
2.34.1
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