ARM: vexpress: Start using new Versatile Express infrastructure

This patch starts using all the configuration infrastructure.

- generic GPIO library is forced now

- sysreg GPIOs are used as MMC CD and WP information sources;
  thanks to this MMCI auxiliary data is not longer necessary

- DVI muxer and mode control is removed from non-DT V2P-CA9 code
  as this is now handled by the vexpress-dvi driver

- clock generators control is removed as is being handled by the
  common clock driver now

- the sysreg and sysctl control is now delegated to the
  appropriate drivers and all related code was removed

- NOR Flash set_vpp function has been removed as the control
  bit used does _not_ control its VPP line, but the #WP signal
  instead (which is de facto unusable in case of Linux MTD
  drivers); this also allowed the remove its DT auxiliary
  data

The non-DT code defines only minimal required number of
the config devices. Device Trees are updated to make use
of all new features.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>

arch/arm/include/asm/hardware/sp810.h

@@ -50,12 +50,6 @@
 #define SCPCELLID2		0xFF8
 #define SCPCELLID3		0xFFC
 
-#define SCCTRL_TIMEREN0SEL_REFCLK	(0 << 15)
-#define SCCTRL_TIMEREN0SEL_TIMCLK	(1 << 15)
-
-#define SCCTRL_TIMEREN1SEL_REFCLK	(0 << 17)
-#define SCCTRL_TIMEREN1SEL_TIMCLK	(1 << 17)
-
 #define SCCTRL_TIMERENnSEL_SHIFT(n)	(15 + ((n) * 2))
 
 static inline void sysctl_soft_reset(void __iomem *base)

arch/arm/mach-vexpress/Kconfig

 config ARCH_VEXPRESS
 	bool "ARM Ltd. Versatile Express family" if ARCH_MULTI_V7
-	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select ARCH_REQUIRE_GPIOLIB
 	select ARM_AMBA
 	select ARM_GIC
 	select ARM_TIMER_SP804
 	select CLKDEV_LOOKUP
 	select COMMON_CLK
+	select COMMON_CLK_VERSATILE
 	select CPU_V7
 	select GENERIC_CLOCKEVENTS
 	select HAVE_CLK
@@ -17,6 +18,7 @@ config ARCH_VEXPRESS
 	select PLAT_VERSATILE
 	select PLAT_VERSATILE_CLCD
 	select REGULATOR_FIXED_VOLTAGE if REGULATOR
+	select VEXPRESS_CONFIG
 	help
 	  This option enables support for systems using Cortex processor based
 	  ARM core and logic (FPGA) tiles on the Versatile Express motherboard,

arch/arm/mach-vexpress/Makefile

@@ -4,7 +4,7 @@
 ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include \
 	-I$(srctree)/arch/arm/plat-versatile/include
 
-obj-y					:= v2m.o
+obj-y					:= v2m.o reset.o
 obj-$(CONFIG_ARCH_VEXPRESS_CA9X4)	+= ct-ca9x4.o
 obj-$(CONFIG_SMP)			+= platsmp.o
 obj-$(CONFIG_HOTPLUG_CPU)		+= hotplug.o

arch/arm/mach-vexpress/ct-ca9x4.c

@@ -9,6 +9,7 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/clcd.h>
 #include <linux/clkdev.h>
+#include <linux/vexpress.h>
 
 #include <asm/hardware/arm_timer.h>
 #include <asm/hardware/cache-l2x0.h>
@@ -64,19 +65,6 @@ static void __init ct_ca9x4_init_irq(void)
 	ca9x4_twd_init();
 }
 
-static void ct_ca9x4_clcd_enable(struct clcd_fb *fb)
-{
-	u32 site = v2m_get_master_site();
-
-	/*
-	 * Old firmware was using the "site" component of the command
-	 * to control the DVI muxer (while it should be always 0 ie. MB).
-	 * Newer firmware uses the data register. Keep both for compatibility.
-	 */
-	v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE(site), site);
-	v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE(SYS_CFG_SITE_MB), 2);
-}
-
 static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
 {
 	unsigned long framesize = 1024 * 768 * 2;
@@ -93,7 +81,6 @@ static struct clcd_board ct_ca9x4_clcd_data = {
 	.caps		= CLCD_CAP_5551 | CLCD_CAP_565,
 	.check		= clcdfb_check,
 	.decode		= clcdfb_decode,
-	.enable		= ct_ca9x4_clcd_enable,
 	.setup		= ct_ca9x4_clcd_setup,
 	.mmap		= versatile_clcd_mmap_dma,
 	.remove		= versatile_clcd_remove_dma,
@@ -111,14 +98,6 @@ static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
 	&gpio_device,
 };
 
-
-static struct v2m_osc ct_osc1 = {
-	.osc = 1,
-	.rate_min = 10000000,
-	.rate_max = 80000000,
-	.rate_default = 23750000,
-};
-
 static struct resource pmu_resources[] = {
 	[0] = {
 		.start	= IRQ_CT_CA9X4_PMU_CPU0,
@@ -149,10 +128,18 @@ static struct platform_device pmu_device = {
 	.resource	= pmu_resources,
 };
 
+static struct platform_device osc1_device = {
+	.name		= "vexpress-osc",
+	.id		= 1,
+	.num_resources	= 1,
+	.resource	= (struct resource []) {
+		VEXPRESS_RES_FUNC(0xf, 1),
+	},
+};
+
 static void __init ct_ca9x4_init(void)
 {
 	int i;
-	struct clk *clk;
 
 #ifdef CONFIG_CACHE_L2X0
 	void __iomem *l2x0_base = ioremap(CT_CA9X4_L2CC, SZ_4K);
@@ -164,14 +151,14 @@ static void __init ct_ca9x4_init(void)
 	l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
 #endif
 
-	ct_osc1.site = v2m_get_master_site();
-	clk = v2m_osc_register("ct:osc1", &ct_osc1);
-	clk_register_clkdev(clk, NULL, "ct:clcd");
-
 	for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
 		amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);
 
 	platform_device_register(&pmu_device);
+	platform_device_register(&osc1_device);
+
+	WARN_ON(clk_register_clkdev(vexpress_osc_setup(&osc1_device.dev),
+			NULL, "ct:clcd"));
 }
 
 #ifdef CONFIG_SMP

arch/arm/mach-vexpress/include/mach/motherboard.h

 #ifndef __MACH_MOTHERBOARD_H
 #define __MACH_MOTHERBOARD_H
 
-#include <linux/clk-provider.h>
-
 /*
  * Physical addresses, offset from V2M_PA_CS0-3
  */
@@ -41,31 +39,6 @@
 #define V2M_CF			(V2M_PA_CS7 + 0x0001a000)
 #define V2M_CLCD		(V2M_PA_CS7 + 0x0001f000)
 
-/*
- * Offsets from SYSREGS base
- */
-#define V2M_SYS_ID		0x000
-#define V2M_SYS_SW		0x004
-#define V2M_SYS_LED		0x008
-#define V2M_SYS_100HZ		0x024
-#define V2M_SYS_FLAGS		0x030
-#define V2M_SYS_FLAGSSET	0x030
-#define V2M_SYS_FLAGSCLR	0x034
-#define V2M_SYS_NVFLAGS		0x038
-#define V2M_SYS_NVFLAGSSET	0x038
-#define V2M_SYS_NVFLAGSCLR	0x03c
-#define V2M_SYS_MCI		0x048
-#define V2M_SYS_FLASH		0x03c
-#define V2M_SYS_CFGSW		0x058
-#define V2M_SYS_24MHZ		0x05c
-#define V2M_SYS_MISC		0x060
-#define V2M_SYS_DMA		0x064
-#define V2M_SYS_PROCID0		0x084
-#define V2M_SYS_PROCID1		0x088
-#define V2M_SYS_CFGDATA		0x0a0
-#define V2M_SYS_CFGCTRL		0x0a4
-#define V2M_SYS_CFGSTAT		0x0a8
-
 
 /*
  * Interrupts.  Those in {} are for AMBA devices
@@ -90,43 +63,6 @@
 #define IRQ_V2M_PCIE		(32 + 17)
 
 
-/*
- * Configuration
- */
-#define SYS_CFG_START		(1 << 31)
-#define SYS_CFG_WRITE		(1 << 30)
-#define SYS_CFG_OSC		(1 << 20)
-#define SYS_CFG_VOLT		(2 << 20)
-#define SYS_CFG_AMP		(3 << 20)
-#define SYS_CFG_TEMP		(4 << 20)
-#define SYS_CFG_RESET		(5 << 20)
-#define SYS_CFG_SCC		(6 << 20)
-#define SYS_CFG_MUXFPGA		(7 << 20)
-#define SYS_CFG_SHUTDOWN	(8 << 20)
-#define SYS_CFG_REBOOT		(9 << 20)
-#define SYS_CFG_DVIMODE		(11 << 20)
-#define SYS_CFG_POWER		(12 << 20)
-#define SYS_CFG_SITE(n)		((n) << 16)
-#define SYS_CFG_SITE_MB		0
-#define SYS_CFG_SITE_DB1	1
-#define SYS_CFG_SITE_DB2	2
-#define SYS_CFG_STACK(n)	((n) << 12)
-
-#define SYS_CFG_ERR		(1 << 1)
-#define SYS_CFG_COMPLETE	(1 << 0)
-
-int v2m_cfg_write(u32 devfn, u32 data);
-int v2m_cfg_read(u32 devfn, u32 *data);
-void v2m_flags_set(u32 data);
-
-/*
- * Miscellaneous
- */
-#define SYS_MISC_MASTERSITE	(1 << 14)
-#define SYS_PROCIDx_HBI_MASK	0xfff
-
-int v2m_get_master_site(void);
-
 /*
  * Core tile IDs
  */
@@ -149,21 +85,4 @@ struct ct_desc {
 
 extern struct ct_desc *ct_desc;
 
-/*
- * OSC clock provider
- */
-struct v2m_osc {
-	struct clk_hw hw;
-	u8 site; /* 0 = motherboard, 1 = site 1, 2 = site 2 */
-	u8 stack; /* board stack position */
-	u16 osc;
-	unsigned long rate_min;
-	unsigned long rate_max;
-	unsigned long rate_default;
-};
-
-#define to_v2m_osc(osc) container_of(osc, struct v2m_osc, hw)
-
-struct clk *v2m_osc_register(const char *name, struct v2m_osc *osc);
-
 #endif

arch/arm/mach-vexpress/platsmp.c

@@ -13,6 +13,7 @@
 #include <linux/smp.h>
 #include <linux/io.h>
 #include <linux/of_fdt.h>
+#include <linux/vexpress.h>
 
 #include <asm/smp_scu.h>
 #include <asm/hardware/gic.h>
@@ -193,7 +194,7 @@ static void __init vexpress_smp_prepare_cpus(unsigned int max_cpus)
 	 * until it receives a soft interrupt, and then the
 	 * secondary CPU branches to this address.
 	 */
-	v2m_flags_set(virt_to_phys(versatile_secondary_startup));
+	vexpress_flags_set(virt_to_phys(versatile_secondary_startup));
 }
 
 struct smp_operations __initdata vexpress_smp_ops = {

include/linux/vexpress.h

@@ -107,4 +107,15 @@ unsigned __vexpress_get_site(struct device *dev, struct device_node *node);
 void vexpress_sysreg_early_init(void __iomem *base);
 void vexpress_sysreg_of_early_init(void);
 
+void vexpress_power_off(void);
+void vexpress_restart(char str, const char *cmd);
+
+/* Clocks */
+
+struct clk *vexpress_osc_setup(struct device *dev);
+void vexpress_osc_of_setup(struct device_node *node);
+
+void vexpress_clk_init(void __iomem *sp810_base);
+void vexpress_clk_of_init(void);
+
 #endif