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Subject[PATCH 3/4] ARM: ep93xx: ts72xx: Exclude reusable part of the ts72xx board
Date
This commit creates a new file ts72xx-common.c [1], which consists
of code being potentially re-usable by other clones of reference
ts72xx design.

To achieve this goal, a new symbol - TS72XX_COMMON has been introduced.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---
arch/arm/mach-ep93xx/Kconfig | 4 +
arch/arm/mach-ep93xx/Makefile | 1 +
arch/arm/mach-ep93xx/ts72xx-common.c | 158 +++++++++++++++++++++++++++++++++++
arch/arm/mach-ep93xx/ts72xx.c | 122 +--------------------------
arch/arm/mach-ep93xx/ts72xx.h | 5 ++
5 files changed, 172 insertions(+), 118 deletions(-)
create mode 100644 arch/arm/mach-ep93xx/ts72xx-common.c

diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
index 61a75ca3684e..16c5d6eedf45 100644
--- a/arch/arm/mach-ep93xx/Kconfig
+++ b/arch/arm/mach-ep93xx/Kconfig
@@ -131,10 +131,14 @@ config MACH_SNAPPER_CL15

config MACH_TS72XX
bool "Support Technologic Systems TS-72xx SBC"
+ select TS72XX_COMMON
help
Say 'Y' here if you want your kernel to support the
Technologic Systems TS-72xx board.

+config TS72XX_COMMON
+ bool
+
config MACH_VISION_EP9307
bool "Support Vision Engraving Systems EP9307 SoM"
help
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
index b7ae4345ac08..f2692a072864 100644
--- a/arch/arm/mach-ep93xx/Makefile
+++ b/arch/arm/mach-ep93xx/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_MACH_SIM_ONE) += simone.o
obj-$(CONFIG_MACH_SNAPPER_CL15) += snappercl15.o
obj-$(CONFIG_MACH_TS72XX) += ts72xx.o
obj-$(CONFIG_MACH_VISION_EP9307)+= vision_ep9307.o
+obj-$(CONFIG_TS72XX_COMMON) += ts72xx-common.o
diff --git a/arch/arm/mach-ep93xx/ts72xx-common.c b/arch/arm/mach-ep93xx/ts72xx-common.c
new file mode 100644
index 000000000000..6d8b3896a75b
--- /dev/null
+++ b/arch/arm/mach-ep93xx/ts72xx-common.c
@@ -0,0 +1,158 @@
+/*
+ * ts72xx - common platform code (like NAND access)
+ *
+ * Copyright (C) 2017
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/mtd/partitions.h>
+
+#include <mach/hardware.h>
+
+#include <asm/mach/map.h>
+
+#include "soc.h"
+#include "ts72xx.h"
+
+/*************************************************************************
+ * IO map
+ *************************************************************************/
+static struct map_desc ts72xx_common_io_desc[] __initdata = {
+ {
+ .virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE,
+ .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
+ .length = TS72XX_MODEL_SIZE,
+ .type = MT_DEVICE,
+ }
+};
+
+void __init ts72xx_common_map_io(void)
+{
+ ep93xx_map_io();
+ iotable_init(ts72xx_common_io_desc, ARRAY_SIZE(ts72xx_common_io_desc));
+}
+
+/*************************************************************************
+ * NAND flash
+ *************************************************************************/
+#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
+#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
+
+static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
+ int cmd, unsigned int ctrl)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ void __iomem *addr = chip->IO_ADDR_R;
+ unsigned char bits;
+
+ addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
+
+ bits = __raw_readb(addr) & ~0x07;
+ bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
+ bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
+ bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
+
+ __raw_writeb(bits, addr);
+ }
+
+ if (cmd != NAND_CMD_NONE)
+ __raw_writeb(cmd, chip->IO_ADDR_W);
+}
+
+static int ts72xx_nand_device_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ void __iomem *addr = chip->IO_ADDR_R;
+
+ addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
+
+ return !!(__raw_readb(addr) & 0x20);
+}
+
+static struct platform_nand_data ts72xx_nand_data = {
+ .chip = {
+ .nr_chips = 1,
+ .chip_offset = 0,
+ .chip_delay = 15,
+ },
+ .ctrl = {
+ .cmd_ctrl = ts72xx_nand_hwcontrol,
+ .dev_ready = ts72xx_nand_device_ready,
+ },
+};
+
+static struct resource ts72xx_nand_resource[] = {
+ DEFINE_RES_MEM(EP93XX_CS6_PHYS_BASE, SZ_16M),
+};
+
+static struct platform_device ts72xx_nand_flash = {
+ .name = "gen_nand",
+ .id = -1,
+ .dev.platform_data = &ts72xx_nand_data,
+ .resource = ts72xx_nand_resource,
+ .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
+};
+
+void __init ts72xx_register_flash(struct mtd_partition *parts, int n)
+{
+ /*
+ * TS7200 has NOR flash all other TS72xx board have NAND flash.
+ */
+ if (board_is_ts7200()) {
+ ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
+ } else {
+ resource_size_t start;
+
+ if (is_ts9420_installed())
+ start = EP93XX_CS7_PHYS_BASE;
+ else
+ start = EP93XX_CS6_PHYS_BASE;
+
+ ts72xx_nand_resource[0].start = start;
+ ts72xx_nand_resource[0].end = start + SZ_16M - 1;
+
+ ts72xx_nand_data.chip.partitions = parts;
+ ts72xx_nand_data.chip.nr_partitions = n;
+
+ platform_device_register(&ts72xx_nand_flash);
+ }
+}
+
+/*************************************************************************
+ * WATCHDOG
+ *************************************************************************/
+static struct resource ts72xx_wdt_resources[] = {
+ DEFINE_RES_MEM(TS72XX_WDT_CONTROL_PHYS_BASE, SZ_4K),
+ DEFINE_RES_MEM(TS72XX_WDT_FEED_PHYS_BASE, SZ_4K),
+};
+
+static struct platform_device ts72xx_wdt_device = {
+ .name = "ts72xx-wdt",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
+ .resource = ts72xx_wdt_resources,
+};
+
+void __init ts72xx_register_watchdog(void)
+{
+ platform_device_register(&ts72xx_wdt_device);
+}
+
+/*************************************************************************
+ * ETH
+ *************************************************************************/
+static struct ep93xx_eth_data ts72xx_eth_data = {
+ .phy_id = 1,
+};
+
+void __init ts72xx_register_eth(void)
+{
+ ep93xx_register_eth(&ts72xx_eth_data, 1);
+}
diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
index 06345b85f27c..d8bb352a5422 100644
--- a/arch/arm/mach-ep93xx/ts72xx.c
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -30,11 +30,6 @@

static struct map_desc ts72xx_io_desc[] __initdata = {
{
- .virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE,
- .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
- .length = TS72XX_MODEL_SIZE,
- .type = MT_DEVICE,
- }, {
.virtual = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
.pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
.length = TS72XX_OPTIONS_SIZE,
@@ -49,50 +44,10 @@ static struct map_desc ts72xx_io_desc[] __initdata = {

static void __init ts72xx_map_io(void)
{
- ep93xx_map_io();
+ ts72xx_common_map_io();
iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
}

-
-/*************************************************************************
- * NAND flash
- *************************************************************************/
-#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
-#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
-
-static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
- int cmd, unsigned int ctrl)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
-
- if (ctrl & NAND_CTRL_CHANGE) {
- void __iomem *addr = chip->IO_ADDR_R;
- unsigned char bits;
-
- addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
-
- bits = __raw_readb(addr) & ~0x07;
- bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
- bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
- bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
-
- __raw_writeb(bits, addr);
- }
-
- if (cmd != NAND_CMD_NONE)
- __raw_writeb(cmd, chip->IO_ADDR_W);
-}
-
-static int ts72xx_nand_device_ready(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- void __iomem *addr = chip->IO_ADDR_R;
-
- addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
-
- return !!(__raw_readb(addr) & 0x20);
-}
-
#define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
#define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)

@@ -115,59 +70,6 @@ static struct mtd_partition ts72xx_nand_parts[] = {
},
};

-static struct platform_nand_data ts72xx_nand_data = {
- .chip = {
- .nr_chips = 1,
- .chip_offset = 0,
- .chip_delay = 15,
- .partitions = ts72xx_nand_parts,
- .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
- },
- .ctrl = {
- .cmd_ctrl = ts72xx_nand_hwcontrol,
- .dev_ready = ts72xx_nand_device_ready,
- },
-};
-
-static struct resource ts72xx_nand_resource[] = {
- {
- .start = 0, /* filled in later */
- .end = 0, /* filled in later */
- .flags = IORESOURCE_MEM,
- },
-};
-
-static struct platform_device ts72xx_nand_flash = {
- .name = "gen_nand",
- .id = -1,
- .dev.platform_data = &ts72xx_nand_data,
- .resource = ts72xx_nand_resource,
- .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
-};
-
-
-static void __init ts72xx_register_flash(void)
-{
- /*
- * TS7200 has NOR flash all other TS72xx board have NAND flash.
- */
- if (board_is_ts7200()) {
- ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
- } else {
- resource_size_t start;
-
- if (is_ts9420_installed())
- start = EP93XX_CS7_PHYS_BASE;
- else
- start = EP93XX_CS6_PHYS_BASE;
-
- ts72xx_nand_resource[0].start = start;
- ts72xx_nand_resource[0].end = start + SZ_16M - 1;
-
- platform_device_register(&ts72xx_nand_flash);
- }
-}
-
/*************************************************************************
* RTC M48T86
*************************************************************************/
@@ -186,22 +88,6 @@ static struct platform_device ts72xx_rtc_device = {
.num_resources = ARRAY_SIZE(ts72xx_rtc_resources),
};

-static struct resource ts72xx_wdt_resources[] = {
- DEFINE_RES_MEM(TS72XX_WDT_CONTROL_PHYS_BASE, SZ_4K),
- DEFINE_RES_MEM(TS72XX_WDT_FEED_PHYS_BASE, SZ_4K),
-};
-
-static struct platform_device ts72xx_wdt_device = {
- .name = "ts72xx-wdt",
- .id = -1,
- .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
- .resource = ts72xx_wdt_resources,
-};
-
-static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
- .phy_id = 1,
-};
-
#if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)

/* Relative to EP93XX_CS1_PHYS_BASE */
@@ -223,11 +109,11 @@ static struct platform_device ts73xx_fpga_device = {
static void __init ts72xx_init_machine(void)
{
ep93xx_init_devices();
- ts72xx_register_flash();
+ ts72xx_register_flash(ts72xx_nand_parts, ARRAY_SIZE(ts72xx_nand_parts));
platform_device_register(&ts72xx_rtc_device);
- platform_device_register(&ts72xx_wdt_device);
+ ts72xx_register_watchdog();
+ ts72xx_register_eth();

- ep93xx_register_eth(&ts72xx_eth_data, 1);
#if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
if (board_is_ts7300())
platform_device_register(&ts73xx_fpga_device);
diff --git a/arch/arm/mach-ep93xx/ts72xx.h b/arch/arm/mach-ep93xx/ts72xx.h
index d67f203f769a..a9d3bb49f666 100644
--- a/arch/arm/mach-ep93xx/ts72xx.h
+++ b/arch/arm/mach-ep93xx/ts72xx.h
@@ -87,5 +87,10 @@ static inline int is_ts9420_installed(void)
return !!(__raw_readb(TS72XX_OPTIONS2_VIRT_BASE) &
TS72XX_OPTIONS2_TS9420);
}
+
+void __init ts72xx_register_flash(struct mtd_partition *parts, int n);
+void __init ts72xx_register_watchdog(void);
+void __init ts72xx_common_map_io(void);
+void __init ts72xx_register_eth(void);
#endif
#endif /* __TS72XX_H_ */
--
2.11.0
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