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serial: sh-sci: Abstract register maps.

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This takes a bit of a sledgehammer to the horribly CPU subtype
ifdef-ridden header and abstracts all of the different register layouts
in to distinct types which in turn can be overriden on a per-port basis,
or permitted to default to the map matching the port type at probe time.

In the process this ultimately fixes up inumerable bugs with mismatches
on various CPU types (particularly the legacy ones that were obviously
broken years ago and no one noticed) and provides a more tightly coupled
and consolidated platform for extending and implementing generic
features.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2011-06-14 12:40:19 +09:00
parent e13198894b
commit 61a6976bf1
25 changed files with 516 additions and 328 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/sh/kernel/cpu/sh3/Makefile
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@@ -7,15 +7,15 @@ obj-y := ex.o probe.o entry.o setup-sh3.o
obj-$(CONFIG_HIBERNATION) += swsusp.o
# CPU subtype setup
obj-$(CONFIG_CPU_SUBTYPE_SH7705) += setup-sh7705.o
obj-$(CONFIG_CPU_SUBTYPE_SH7706) += setup-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7707) += setup-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7708) += setup-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7709) += setup-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7710) += setup-sh7710.o
obj-$(CONFIG_CPU_SUBTYPE_SH7712) += setup-sh7710.o
obj-$(CONFIG_CPU_SUBTYPE_SH7720) += setup-sh7720.o
obj-$(CONFIG_CPU_SUBTYPE_SH7721) += setup-sh7720.o
obj-$(CONFIG_CPU_SUBTYPE_SH7705) += setup-sh7705.o serial-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7706) += setup-sh770x.o serial-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7707) += setup-sh770x.o serial-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7708) += setup-sh770x.o serial-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7709) += setup-sh770x.o serial-sh770x.o
obj-$(CONFIG_CPU_SUBTYPE_SH7710) += setup-sh7710.o serial-sh7710.o
obj-$(CONFIG_CPU_SUBTYPE_SH7712) += setup-sh7710.o serial-sh7710.o
obj-$(CONFIG_CPU_SUBTYPE_SH7720) += setup-sh7720.o serial-sh7720.o
obj-$(CONFIG_CPU_SUBTYPE_SH7721) += setup-sh7720.o serial-sh7720.o
# Primary on-chip clocks (common)
clock-$(CONFIG_CPU_SH3) := clock-sh3.o

33
arch/sh/kernel/cpu/sh3/serial-sh770x.c Normal file
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@@ -0,0 +1,33 @@
#include <linux/serial_sci.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <cpu/serial.h>
#define SCPCR 0xA4000116
#define SCPDR 0xA4000136
static void sh770x_sci_init_pins(struct uart_port *port, unsigned int cflag)
{
unsigned short data;
/* We need to set SCPCR to enable RTS/CTS */
data = __raw_readw(SCPCR);
/* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/
__raw_writew(data & 0x0fcf, SCPCR);
if (!(cflag & CRTSCTS)) {
/* We need to set SCPCR to enable RTS/CTS */
data = __raw_readw(SCPCR);
/* Clear out SCP7MD1,0, SCP4MD1,0,
Set SCP6MD1,0 = {01} (output) */
__raw_writew((data & 0x0fcf) | 0x1000, SCPCR);
data = __raw_readb(SCPDR);
/* Set /RTS2 (bit6) = 0 */
__raw_writeb(data & 0xbf, SCPDR);
}
}
struct plat_sci_port_ops sh770x_sci_port_ops = {
.init_pins = sh770x_sci_init_pins,
};

20
arch/sh/kernel/cpu/sh3/serial-sh7710.c Normal file
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@@ -0,0 +1,20 @@
#include <linux/serial_sci.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <cpu/serial.h>
#define PACR 0xa4050100
#define PBCR 0xa4050102
static void sh7710_sci_init_pins(struct uart_port *port, unsigned int cflag)
{
if (port->mapbase == 0xA4400000) {
__raw_writew(__raw_readw(PACR) & 0xffc0, PACR);
__raw_writew(__raw_readw(PBCR) & 0x0fff, PBCR);
} else if (port->mapbase == 0xA4410000)
__raw_writew(__raw_readw(PBCR) & 0xf003, PBCR);
}
struct plat_sci_port_ops sh7710_sci_port_ops = {
.init_pins = sh7710_sci_init_pins,
};

36
arch/sh/kernel/cpu/sh3/serial-sh7720.c Normal file
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@@ -0,0 +1,36 @@
#include <linux/serial_sci.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <cpu/serial.h>
static void sh7720_sci_init_pins(struct uart_port *port, unsigned int cflag)
{
unsigned short data;
if (cflag & CRTSCTS) {
/* enable RTS/CTS */
if (port->mapbase == 0xa4430000) { /* SCIF0 */
/* Clear PTCR bit 9-2; enable all scif pins but sck */
data = __raw_readw(PORT_PTCR);
__raw_writew((data & 0xfc03), PORT_PTCR);
} else if (port->mapbase == 0xa4438000) { /* SCIF1 */
/* Clear PVCR bit 9-2 */
data = __raw_readw(PORT_PVCR);
__raw_writew((data & 0xfc03), PORT_PVCR);
}
} else {
if (port->mapbase == 0xa4430000) { /* SCIF0 */
/* Clear PTCR bit 5-2; enable only tx and rx */
data = __raw_readw(PORT_PTCR);
__raw_writew((data & 0xffc3), PORT_PTCR);
} else if (port->mapbase == 0xa4438000) { /* SCIF1 */
/* Clear PVCR bit 5-2 */
data = __raw_readw(PORT_PVCR);
__raw_writew((data & 0xffc3), PORT_PVCR);
}
}
}
struct plat_sci_port_ops sh7720_sci_port_ops = {
.init_pins = sh7720_sci_init_pins,
};

5
arch/sh/kernel/cpu/sh3/setup-sh7705.c
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@@ -15,6 +15,7 @@
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <asm/rtc.h>
#include <cpu/serial.h>
enum {
UNUSED = 0,
@@ -75,6 +76,8 @@ static struct plat_sci_port scif0_platform_data = {
.scbrr_algo_id = SCBRR_ALGO_4,
.type = PORT_SCIF,
.irqs = { 56, 56, 56 },
.ops = &sh770x_sci_port_ops,
.regtype = SCIx_SH7705_SCIF_REGTYPE,
};
static struct platform_device scif0_device = {
@@ -92,6 +95,8 @@ static struct plat_sci_port scif1_platform_data = {
.scbrr_algo_id = SCBRR_ALGO_4,
.type = PORT_SCIF,
.irqs = { 52, 52, 52 },
.ops = &sh770x_sci_port_ops,
.regtype = SCIx_SH7705_SCIF_REGTYPE,
};
static struct platform_device scif1_device = {

8
arch/sh/kernel/cpu/sh3/setup-sh770x.c
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@@ -19,6 +19,7 @@
#include <linux/serial.h>
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <cpu/serial.h>
enum {
UNUSED = 0,
@@ -114,6 +115,8 @@ static struct plat_sci_port scif0_platform_data = {
.scbrr_algo_id = SCBRR_ALGO_2,
.type = PORT_SCI,
.irqs = { 23, 23, 23, 0 },
.ops = &sh770x_sci_port_ops,
.regshift = 1,
};
static struct platform_device scif0_device = {
@@ -133,6 +136,8 @@ static struct plat_sci_port scif1_platform_data = {
.scbrr_algo_id = SCBRR_ALGO_2,
.type = PORT_SCIF,
.irqs = { 56, 56, 56, 56 },
.ops = &sh770x_sci_port_ops,
.regtype = SCIx_SH3_SCIF_REGTYPE,
};
static struct platform_device scif1_device = {
@@ -147,11 +152,14 @@ static struct platform_device scif1_device = {
defined(CONFIG_CPU_SUBTYPE_SH7709)
static struct plat_sci_port scif2_platform_data = {
.mapbase = 0xa4000140,
.port_reg = SCIx_NOT_SUPPORTED,
.flags = UPF_BOOT_AUTOCONF,
.scscr = SCSCR_TE | SCSCR_RE,
.scbrr_algo_id = SCBRR_ALGO_2,
.type = PORT_IRDA,
.irqs = { 52, 52, 52, 52 },
.ops = &sh770x_sci_port_ops,
.regshift = 1,
};
static struct platform_device scif2_device = {

5
arch/sh/kernel/cpu/sh3/setup-sh7720.c
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@@ -20,6 +20,7 @@
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <asm/rtc.h>
#include <cpu/serial.h>
static struct resource rtc_resources[] = {
[0] = {
@@ -55,6 +56,8 @@ static struct plat_sci_port scif0_platform_data = {
.scbrr_algo_id = SCBRR_ALGO_4,
.type = PORT_SCIF,
.irqs = { 80, 80, 80, 80 },
.ops = &sh7720_sci_port_ops,
.regtype = SCIx_SH7705_SCIF_REGTYPE,
};
static struct platform_device scif0_device = {
@@ -72,6 +75,8 @@ static struct plat_sci_port scif1_platform_data = {
.scbrr_algo_id = SCBRR_ALGO_4,
.type = PORT_SCIF,
.irqs = { 81, 81, 81, 81 },
.ops = &sh7720_sci_port_ops,
.regtype = SCIx_SH7705_SCIF_REGTYPE,
};
static struct platform_device scif1_device = {