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Subject[PATCH 03/06] serial8250: Use dl_read()/dl_write() on RM9K
From: Magnus Damm <damm@opensource.se>

Convert the 8250 RM9K support code to make
use of the new dl_read()/dl_write() callbacks.

Signed-off-by: Magnus Damm <damm@opensource.se>
---
drivers/tty/serial/8250/8250.c | 62 ++++++++++++++++++----------------------
1 file changed, 29 insertions(+), 33 deletions(-)
--- 0006/drivers/tty/serial/8250/8250.c
+++ work/drivers/tty/serial/8250/8250.c 2012-05-01 22:51:42.000000000 +0900
@@ -297,25 +297,6 @@ static void default_dl_write(struct uart
serial_out(up, UART_DLM, value >> 8 & 0xff);
}

-#if defined(CONFIG_SERIAL_8250_RM9K)
-static int _serial_dl_read(struct uart_8250_port *up)
-{
- return (up->port.iotype == UPIO_RM9000) ?
- (((__raw_readl(up->port.membase + 0x10) << 8) |
- (__raw_readl(up->port.membase + 0x08) & 0xff)) & 0xffff) :
- default_dl_read(up);
-}
-
-static void _serial_dl_write(struct uart_8250_port *up, int value)
-{
- if (up->port.iotype == UPIO_RM9000) {
- __raw_writel(value, up->port.membase + 0x08);
- __raw_writel(value >> 8, up->port.membase + 0x10);
- } else {
- default_dl_write(up, value);
- }
-}
-#else
static int _serial_dl_read(struct uart_8250_port *up)
{
return default_dl_read(up);
@@ -325,7 +306,6 @@ static void _serial_dl_write(struct uart
{
default_dl_write(up, value);
}
-#endif

#ifdef CONFIG_MIPS_ALCHEMY

@@ -373,7 +353,7 @@ static void au_serial_dl_write(struct ua

#endif

-#if defined(CONFIG_SERIAL_8250_RM9K)
+#ifdef CONFIG_SERIAL_8250_RM9K

static const u8
regmap_in[8] = {
@@ -397,28 +377,36 @@ static const u8
[UART_SCR] = 0x2c
};

-static inline int map_8250_in_reg(struct uart_port *p, int offset)
+static unsigned int rm9k_serial_in(struct uart_port *p, int offset)
+{
+ offset = regmap_in[offset] << p->regshift;
+ return readl(p->membase + offset);
+}
+
+static void rm9k_serial_out(struct uart_port *p, int offset, int value)
{
- if (p->iotype != UPIO_RM9000)
- return offset;
- return regmap_in[offset];
+ offset = regmap_out[offset] << p->regshift;
+ writel(value, p->membase + offset);
+}
+
+static int rm9k_serial_dl_read(struct uart_8250_port *up)
+{
+ return ((__raw_readl(up->port.membase + 0x10) << 8) |
+ (__raw_readl(up->port.membase + 0x08) & 0xff)) & 0xffff;
}

-static inline int map_8250_out_reg(struct uart_port *p, int offset)
+static void rm9k_serial_dl_write(struct uart_8250_port *up, int value)
{
- if (p->iotype != UPIO_RM9000)
- return offset;
- return regmap_out[offset];
+ __raw_writel(value, up->port.membase + 0x08);
+ __raw_writel(value >> 8, up->port.membase + 0x10);
}

-#else
+#endif

/* sane hardware needs no mapping */
#define map_8250_in_reg(up, offset) (offset)
#define map_8250_out_reg(up, offset) (offset)

-#endif
-
static unsigned int hub6_serial_in(struct uart_port *p, int offset)
{
offset = map_8250_in_reg(p, offset) << p->regshift;
@@ -490,12 +478,20 @@ static void set_io_from_upio(struct uart
p->serial_out = mem_serial_out;
break;

- case UPIO_RM9000:
case UPIO_MEM32:
p->serial_in = mem32_serial_in;
p->serial_out = mem32_serial_out;
break;

+#ifdef CONFIG_SERIAL_8250_RM9K
+ case UPIO_RM9000:
+ p->serial_in = rm9k_serial_in;
+ p->serial_out = rm9k_serial_out;
+ up->dl_read = rm9k_serial_dl_read;
+ up->dl_write = rm9k_serial_dl_write;
+ break;
+#endif
+
#ifdef CONFIG_MIPS_ALCHEMY
case UPIO_AU:
p->serial_in = au_serial_in;

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