[uClinux-dev] [RFC] m68knommu: Add support for the Freescale m5253demo board.

[Steven King]

Basic support for the m5253demo board from Freescale. This is a work in
progress, currently only the dm9000 ethernet interface is supported. More
patches to come ;)

This patch is against the v3.4-rc6 for_next branch of the m68knommu.git

Signed-off-by: Steven King <sfking at fdwdc.com>
---
arch/m68k/Kconfig.machine | 7 ++
arch/m68k/include/asm/io_no.h | 8 ++
arch/m68k/include/asm/m525xsim.h | 4 +
arch/m68k/platform/coldfire/Makefile | 1 +
arch/m68k/platform/coldfire/m5253demo.c | 125 +++++++++++++++++++++++++++++++
5 files changed, 145 insertions(+)

diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
index 7cdf6b0..10c97dc 100644
--- a/arch/m68k/Kconfig.machine
+++ b/arch/m68k/Kconfig.machine
@@ -252,6 +252,13 @@ config M5249C3
help
Support for the Motorola M5249C3 board.

+config M5253DEMO
+ bool "Freescale M5253DEMO board support"
+ depends on M525x
+ select FREESCALE
+ help
+ Support for the Freescale M5253DEMO board.
+
config M5271EVB
bool "Freescale (Motorola) M5271EVB board support"
depends on M5271
diff --git a/arch/m68k/include/asm/io_no.h b/arch/m68k/include/asm/io_no.h
index 353bf75..3d18c94 100644
--- a/arch/m68k/include/asm/io_no.h
+++ b/arch/m68k/include/asm/io_no.h
@@ -135,6 +135,14 @@ static inline void io_insl(unsigned int addr, void *buf, int len)
#define insw(a,b,l) io_insw(a,b,l)
#define insl(a,b,l) io_insl(a,b,l)

+#define writesb(a, b, l) io_outsb((unsigned int)a, b, l)
+#define writesw(a, b, l) io_outsw((unsigned int)a, b, l)
+#define writesl(a, b, l) io_outsl((unsigned int)a, b, l)
+
+#define readsb(a, b, l) io_insb((unsigned int)a, b, l)
+#define readsw(a, b, l) io_insw((unsigned int)a, b, l)
+#define readsl(a, b, l) io_insl((unsigned int)a, b, l)
+
#define IO_SPACE_LIMIT 0xffffffff


diff --git a/arch/m68k/include/asm/m525xsim.h b/arch/m68k/include/asm/m525xsim.h
index 3d62b9d..46fbb34 100644
--- a/arch/m68k/include/asm/m525xsim.h
+++ b/arch/m68k/include/asm/m525xsim.h
@@ -105,6 +105,10 @@
#define MCFQSPI_CS0 15
#define MCFQSPI_CS1 16
#define MCFQSPI_CS2 24
+#if !IS_ENABLED(CONFIG_DM9000)
+/* on the m5253demo the CS1/QSPICS3 is used as CS for the dm9000 */
+#define MCFQSPI_CS3 28
+#endif

/*
* I2C module.
diff --git a/arch/m68k/platform/coldfire/Makefile b/arch/m68k/platform/coldfire/Makefile
index 82f0764..612f8cd 100644
--- a/arch/m68k/platform/coldfire/Makefile
+++ b/arch/m68k/platform/coldfire/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_M54xx) += m54xx.o sltimers.o intc-2.o
obj-$(CONFIG_NETtel) += nettel.o
obj-$(CONFIG_CLEOPATRA) += nettel.o
obj-$(CONFIG_FIREBEE) += firebee.o
+obj-$(CONFIG_M5253DEMO) += m5253demo.o

obj-y += pinmux.o gpio.o
extra-y := head.o
diff --git a/arch/m68k/platform/coldfire/m5253demo.c b/arch/m68k/platform/coldfire/m5253demo.c
new file mode 100644
index 0000000..9041e1b
--- /dev/null
+++ b/arch/m68k/platform/coldfire/m5253demo.c
@@ -0,0 +1,125 @@
+/***************************************************************************/
+/*
+ * m5253demo.c -- board support for the Freescale M5253demo board
+ *
+ * Copyright (C) 2012, Steven King <sfking at fdwdc.com>
+ */
+
+/***************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/dm9000.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+
+/***************************************************************************/
+#if IS_ENABLED(CONFIG_DM9000)
+
+/* The m5253demo has the DM9000 at 0x0e0000300/0x0e0000304, gpio5/irq 37 */
+
+#define DM9000_ADDR 0xe0000300
+#define DM9000_DATA 0xe0000304
+#define DM9000_IRQ MCF_IRQ_GPIO5
+
+#define DM9000_GPIO (DM9000_IRQ - MCF_IRQ_GPIO0)
+
+static struct resource m5253demo_dm9000_resources[] = {
+ [0] = {
+ .start = DM9000_ADDR,
+ .end = DM9000_ADDR + 0x3,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = DM9000_DATA,
+ .end = DM9000_DATA + 0x3,
+ .flags = IORESOURCE_MEM,
+ },
+ [2] = {
+ .start = DM9000_IRQ,
+ .end = DM9000_IRQ,
+ .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
+ },
+};
+
+static void m5253demo_dm9000_inblk(void __iomem *reg, void *data, int len)
+{
+ u16 *buf = data;
+ int n = (len + 1) >> 1;
+ while (n-- > 0)
+ *buf++ = readw(reg);
+}
+
+static void m5253demo_dm9000_outblk(void __iomem *reg, void *data, int len)
+{
+ u16 *buf = data;
+ int n = (len + 1) >> 1;
+ while (n-- > 0)
+ writew(*buf++, reg);
+}
+
+static void m5253demo_dm9000_dumpblk(void __iomem *reg, int len)
+{
+ int n = (len + 1) >> 1;
+ while (n-- > 0)
+ readw(reg);
+}
+
+static struct dm9000_plat_data m5253demo_dm9000_platdata = {
+ .flags = DM9000_PLATF_NO_EEPROM,
+ .inblk = m5253demo_dm9000_inblk,
+ .outblk = m5253demo_dm9000_outblk,
+ .dumpblk = m5253demo_dm9000_dumpblk,
+};
+
+static struct platform_device m5253demo_dm9000 = {
+ .name = "dm9000",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(m5253demo_dm9000_resources),
+ .resource = m5253demo_dm9000_resources,
+ .dev.platform_data = &m5253demo_dm9000_platdata,
+};
+
+static void __init m5253demo_dm9000_init(void)
+{
+ u32 r;
+ int status;
+
+ /* set the gpio function for DM9000_GPIO to gpio */
+ /* FIXME: replace with pinmux/pinctl support */
+ r = readl(MCFSIM2_GPIOFUNC);
+ r |= 1 << DM9000_GPIO;
+ writel(r, MCFSIM2_GPIOFUNC);
+
+ /* reserve the gpio so nothing else can request it */
+ /* FIXME: replace with pinmux/pinctl support */
+ status = gpio_request(DM9000_GPIO, "DM9000_GPIO");
+ if (status)
+ pr_warn("gpio_request for DM9000_GPIO failed\n");
+ /* set the priority level for DM9000 gpio irq */
+ r = readl(MCFINTC2_INTPRI_REG(DM9000_IRQ));
+ r &= ~MCFINTC2_INTPRI_BITS(0xf, DM9000_IRQ);
+ r |= MCFINTC2_INTPRI_BITS(0x4, DM9000_IRQ);
+ writel(r, MCFINTC2_INTPRI_REG(DM9000_IRQ));
+}
+#endif /* IS_ENABLED(CONFIG_DM9000) */
+
+static struct platform_device *m5253demo_devices[] __initdata = {
+ &m5253demo_dm9000,
+};
+
+static int __init m5253demo_init(void)
+{
+ m5253demo_dm9000_init();
+ platform_add_devices(m5253demo_devices, ARRAY_SIZE(m5253demo_devices));
+ return 0;
+}
+
+arch_initcall(m5253demo_init);
+
+/***************************************************************************/