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-rw-r--r--arch/arm/plat-pxa/Kconfig3
-rw-r--r--arch/arm/plat-pxa/Makefile7
-rw-r--r--arch/arm/plat-pxa/dma.c144
-rw-r--r--arch/arm/plat-pxa/gpio.c337
-rw-r--r--arch/arm/plat-pxa/include/plat/dma.h85
-rw-r--r--arch/arm/plat-pxa/include/plat/gpio.h62
-rw-r--r--arch/arm/plat-pxa/include/plat/mfp.h399
-rw-r--r--arch/arm/plat-pxa/mfp.c278
8 files changed, 1315 insertions, 0 deletions
diff --git a/arch/arm/plat-pxa/Kconfig b/arch/arm/plat-pxa/Kconfig
new file mode 100644
index 00000000000..b158e98038e
--- /dev/null
+++ b/arch/arm/plat-pxa/Kconfig
@@ -0,0 +1,3 @@
+if PLAT_PXA
+
+endif
diff --git a/arch/arm/plat-pxa/Makefile b/arch/arm/plat-pxa/Makefile
new file mode 100644
index 00000000000..4be37235f57
--- /dev/null
+++ b/arch/arm/plat-pxa/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for code common across different PXA processor families
+#
+
+obj-y := dma.o mfp.o
+
+obj-$(CONFIG_GENERIC_GPIO) += gpio.o
diff --git a/arch/arm/plat-pxa/dma.c b/arch/arm/plat-pxa/dma.c
new file mode 100644
index 00000000000..70aeee407f7
--- /dev/null
+++ b/arch/arm/plat-pxa/dma.c
@@ -0,0 +1,144 @@
+/*
+ * linux/arch/arm/plat-pxa/dma.c
+ *
+ * PXA DMA registration and IRQ dispatching
+ *
+ * Author: Nicolas Pitre
+ * Created: Nov 15, 2001
+ * Copyright: MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <mach/dma.h>
+
+struct dma_channel {
+ char *name;
+ pxa_dma_prio prio;
+ void (*irq_handler)(int, void *);
+ void *data;
+};
+
+static struct dma_channel *dma_channels;
+static int num_dma_channels;
+
+int pxa_request_dma (char *name, pxa_dma_prio prio,
+ void (*irq_handler)(int, void *),
+ void *data)
+{
+ unsigned long flags;
+ int i, found = 0;
+
+ /* basic sanity checks */
+ if (!name || !irq_handler)
+ return -EINVAL;
+
+ local_irq_save(flags);
+
+ do {
+ /* try grabbing a DMA channel with the requested priority */
+ for (i = 0; i < num_dma_channels; i++) {
+ if ((dma_channels[i].prio == prio) &&
+ !dma_channels[i].name) {
+ found = 1;
+ break;
+ }
+ }
+ /* if requested prio group is full, try a hier priority */
+ } while (!found && prio--);
+
+ if (found) {
+ DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+ dma_channels[i].name = name;
+ dma_channels[i].irq_handler = irq_handler;
+ dma_channels[i].data = data;
+ } else {
+ printk (KERN_WARNING "No more available DMA channels for %s\n", name);
+ i = -ENODEV;
+ }
+
+ local_irq_restore(flags);
+ return i;
+}
+
+void pxa_free_dma (int dma_ch)
+{
+ unsigned long flags;
+
+ if (!dma_channels[dma_ch].name) {
+ printk (KERN_CRIT
+ "%s: trying to free channel %d which is already freed\n",
+ __func__, dma_ch);
+ return;
+ }
+
+ local_irq_save(flags);
+ DCSR(dma_ch) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+ dma_channels[dma_ch].name = NULL;
+ local_irq_restore(flags);
+}
+
+static irqreturn_t dma_irq_handler(int irq, void *dev_id)
+{
+ int i, dint = DINT;
+
+ for (i = 0; i < num_dma_channels; i++) {
+ if (dint & (1 << i)) {
+ struct dma_channel *channel = &dma_channels[i];
+ if (channel->name && channel->irq_handler) {
+ channel->irq_handler(i, channel->data);
+ } else {
+ /*
+ * IRQ for an unregistered DMA channel:
+ * let's clear the interrupts and disable it.
+ */
+ printk (KERN_WARNING "spurious IRQ for DMA channel %d\n", i);
+ DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+ }
+ }
+ }
+ return IRQ_HANDLED;
+}
+
+int __init pxa_init_dma(int irq, int num_ch)
+{
+ int i, ret;
+
+ dma_channels = kzalloc(sizeof(struct dma_channel) * num_ch, GFP_KERNEL);
+ if (dma_channels == NULL)
+ return -ENOMEM;
+
+ /* dma channel priorities on pxa2xx processors:
+ * ch 0 - 3, 16 - 19 <--> (0) DMA_PRIO_HIGH
+ * ch 4 - 7, 20 - 23 <--> (1) DMA_PRIO_MEDIUM
+ * ch 8 - 15, 24 - 31 <--> (2) DMA_PRIO_LOW
+ */
+ for (i = 0; i < num_ch; i++) {
+ DCSR(i) = 0;
+ dma_channels[i].prio = min((i & 0xf) >> 2, DMA_PRIO_LOW);
+ }
+
+ ret = request_irq(irq, dma_irq_handler, IRQF_DISABLED, "DMA", NULL);
+ if (ret) {
+ printk (KERN_CRIT "Wow! Can't register IRQ for DMA\n");
+ kfree(dma_channels);
+ return ret;
+ }
+
+ num_dma_channels = num_ch;
+ return 0;
+}
+
+EXPORT_SYMBOL(pxa_request_dma);
+EXPORT_SYMBOL(pxa_free_dma);
diff --git a/arch/arm/plat-pxa/gpio.c b/arch/arm/plat-pxa/gpio.c
new file mode 100644
index 00000000000..af819bf21b6
--- /dev/null
+++ b/arch/arm/plat-pxa/gpio.c
@@ -0,0 +1,337 @@
+/*
+ * linux/arch/arm/plat-pxa/gpio.c
+ *
+ * Generic PXA GPIO handling
+ *
+ * Author: Nicolas Pitre
+ * Created: Jun 15, 2001
+ * Copyright: MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/sysdev.h>
+#include <linux/bootmem.h>
+
+#include <mach/gpio.h>
+
+int pxa_last_gpio;
+
+struct pxa_gpio_chip {
+ struct gpio_chip chip;
+ void __iomem *regbase;
+ char label[10];
+
+ unsigned long irq_mask;
+ unsigned long irq_edge_rise;
+ unsigned long irq_edge_fall;
+
+#ifdef CONFIG_PM
+ unsigned long saved_gplr;
+ unsigned long saved_gpdr;
+ unsigned long saved_grer;
+ unsigned long saved_gfer;
+#endif
+};
+
+static DEFINE_SPINLOCK(gpio_lock);
+static struct pxa_gpio_chip *pxa_gpio_chips;
+
+#define for_each_gpio_chip(i, c) \
+ for (i = 0, c = &pxa_gpio_chips[0]; i <= pxa_last_gpio; i += 32, c++)
+
+static inline void __iomem *gpio_chip_base(struct gpio_chip *c)
+{
+ return container_of(c, struct pxa_gpio_chip, chip)->regbase;
+}
+
+static inline struct pxa_gpio_chip *gpio_to_chip(unsigned gpio)
+{
+ return &pxa_gpio_chips[gpio_to_bank(gpio)];
+}
+
+static int pxa_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ void __iomem *base = gpio_chip_base(chip);
+ uint32_t value, mask = 1 << offset;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ value = __raw_readl(base + GPDR_OFFSET);
+ if (__gpio_is_inverted(chip->base + offset))
+ value |= mask;
+ else
+ value &= ~mask;
+ __raw_writel(value, base + GPDR_OFFSET);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return 0;
+}
+
+static int pxa_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ void __iomem *base = gpio_chip_base(chip);
+ uint32_t tmp, mask = 1 << offset;
+ unsigned long flags;
+
+ __raw_writel(mask, base + (value ? GPSR_OFFSET : GPCR_OFFSET));
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ tmp = __raw_readl(base + GPDR_OFFSET);
+ if (__gpio_is_inverted(chip->base + offset))
+ tmp &= ~mask;
+ else
+ tmp |= mask;
+ __raw_writel(tmp, base + GPDR_OFFSET);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return 0;
+}
+
+static int pxa_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ return __raw_readl(gpio_chip_base(chip) + GPLR_OFFSET) & (1 << offset);
+}
+
+static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ __raw_writel(1 << offset, gpio_chip_base(chip) +
+ (value ? GPSR_OFFSET : GPCR_OFFSET));
+}
+
+static int __init pxa_init_gpio_chip(int gpio_end)
+{
+ int i, gpio, nbanks = gpio_to_bank(gpio_end) + 1;
+ struct pxa_gpio_chip *chips;
+
+ /* this is early, we have to use bootmem allocator, and we really
+ * want this to be allocated dynamically for different 'gpio_end'
+ */
+ chips = alloc_bootmem_low(nbanks * sizeof(struct pxa_gpio_chip));
+ if (chips == NULL) {
+ pr_err("%s: failed to allocate GPIO chips\n", __func__);
+ return -ENOMEM;
+ }
+
+ for (i = 0, gpio = 0; i < nbanks; i++, gpio += 32) {
+ struct gpio_chip *c = &chips[i].chip;
+
+ sprintf(chips[i].label, "gpio-%d", i);
+ chips[i].regbase = (void __iomem *)GPIO_BANK(i);
+
+ c->base = gpio;
+ c->label = chips[i].label;
+
+ c->direction_input = pxa_gpio_direction_input;
+ c->direction_output = pxa_gpio_direction_output;
+ c->get = pxa_gpio_get;
+ c->set = pxa_gpio_set;
+
+ /* number of GPIOs on last bank may be less than 32 */
+ c->ngpio = (gpio + 31 > gpio_end) ? (gpio_end - gpio + 1) : 32;
+ gpiochip_add(c);
+ }
+ pxa_gpio_chips = chips;
+ return 0;
+}
+
+static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
+{
+ struct pxa_gpio_chip *c;
+ int gpio = irq_to_gpio(irq);
+ unsigned long gpdr, mask = GPIO_bit(gpio);
+
+ c = gpio_to_chip(gpio);
+
+ if (type == IRQ_TYPE_PROBE) {
+ /* Don't mess with enabled GPIOs using preconfigured edges or
+ * GPIOs set to alternate function or to output during probe
+ */
+ if ((c->irq_edge_rise | c->irq_edge_fall) & GPIO_bit(gpio))
+ return 0;
+
+ if (__gpio_is_occupied(gpio))
+ return 0;
+
+ type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+ }
+
+ gpdr = __raw_readl(c->regbase + GPDR_OFFSET);
+
+ if (__gpio_is_inverted(gpio))
+ __raw_writel(gpdr | mask, c->regbase + GPDR_OFFSET);
+ else
+ __raw_writel(gpdr & ~mask, c->regbase + GPDR_OFFSET);
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ c->irq_edge_rise |= mask;
+ else
+ c->irq_edge_rise &= ~mask;
+
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ c->irq_edge_fall |= mask;
+ else
+ c->irq_edge_fall &= ~mask;
+
+ __raw_writel(c->irq_edge_rise & c->irq_mask, c->regbase + GRER_OFFSET);
+ __raw_writel(c->irq_edge_fall & c->irq_mask, c->regbase + GFER_OFFSET);
+
+ pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio,
+ ((type & IRQ_TYPE_EDGE_RISING) ? " rising" : ""),
+ ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
+ return 0;
+}
+
+static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct pxa_gpio_chip *c;
+ int loop, gpio, gpio_base, n;
+ unsigned long gedr;
+
+ do {
+ loop = 0;
+ for_each_gpio_chip(gpio, c) {
+ gpio_base = c->chip.base;
+
+ gedr = __raw_readl(c->regbase + GEDR_OFFSET);
+ gedr = gedr & c->irq_mask;
+ __raw_writel(gedr, c->regbase + GEDR_OFFSET);
+
+ n = find_first_bit(&gedr, BITS_PER_LONG);
+ while (n < BITS_PER_LONG) {
+ loop = 1;
+
+ generic_handle_irq(gpio_to_irq(gpio_base + n));
+ n = find_next_bit(&gedr, BITS_PER_LONG, n + 1);
+ }
+ }
+ } while (loop);
+}
+
+static void pxa_ack_muxed_gpio(unsigned int irq)
+{
+ int gpio = irq_to_gpio(irq);
+ struct pxa_gpio_chip *c = gpio_to_chip(gpio);
+
+ __raw_writel(GPIO_bit(gpio), c->regbase + GEDR_OFFSET);
+}
+
+static void pxa_mask_muxed_gpio(unsigned int irq)
+{
+ int gpio = irq_to_gpio(irq);
+ struct pxa_gpio_chip *c = gpio_to_chip(gpio);
+ uint32_t grer, gfer;
+
+ c->irq_mask &= ~GPIO_bit(gpio);
+
+ grer = __raw_readl(c->regbase + GRER_OFFSET) & ~GPIO_bit(gpio);
+ gfer = __raw_readl(c->regbase + GFER_OFFSET) & ~GPIO_bit(gpio);
+ __raw_writel(grer, c->regbase + GRER_OFFSET);
+ __raw_writel(gfer, c->regbase + GFER_OFFSET);
+}
+
+static void pxa_unmask_muxed_gpio(unsigned int irq)
+{
+ int gpio = irq_to_gpio(irq);
+ struct pxa_gpio_chip *c = gpio_to_chip(gpio);
+
+ c->irq_mask |= GPIO_bit(gpio);
+ __raw_writel(c->irq_edge_rise & c->irq_mask, c->regbase + GRER_OFFSET);
+ __raw_writel(c->irq_edge_fall & c->irq_mask, c->regbase + GFER_OFFSET);
+}
+
+static struct irq_chip pxa_muxed_gpio_chip = {
+ .name = "GPIO",
+ .ack = pxa_ack_muxed_gpio,
+ .mask = pxa_mask_muxed_gpio,
+ .unmask = pxa_unmask_muxed_gpio,
+ .set_type = pxa_gpio_irq_type,
+};
+
+void __init pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn)
+{
+ struct pxa_gpio_chip *c;
+ int gpio, irq;
+
+ pxa_last_gpio = end;
+
+ /* Initialize GPIO chips */
+ pxa_init_gpio_chip(end);
+
+ /* clear all GPIO edge detects */
+ for_each_gpio_chip(gpio, c) {
+ __raw_writel(0, c->regbase + GFER_OFFSET);
+ __raw_writel(0, c->regbase + GRER_OFFSET);
+ __raw_writel(~0,c->regbase + GEDR_OFFSET);
+ }
+
+ for (irq = gpio_to_irq(start); irq <= gpio_to_irq(end); irq++) {
+ set_irq_chip(irq, &pxa_muxed_gpio_chip);
+ set_irq_handler(irq, handle_edge_irq);
+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ }
+
+ /* Install handler for GPIO>=2 edge detect interrupts */
+ set_irq_chained_handler(mux_irq, pxa_gpio_demux_handler);
+ pxa_muxed_gpio_chip.set_wake = fn;
+}
+
+#ifdef CONFIG_PM
+static int pxa_gpio_suspend(struct sys_device *dev, pm_message_t state)
+{
+ struct pxa_gpio_chip *c;
+ int gpio;
+
+ for_each_gpio_chip(gpio, c) {
+ c->saved_gplr = __raw_readl(c->regbase + GPLR_OFFSET);
+ c->saved_gpdr = __raw_readl(c->regbase + GPDR_OFFSET);
+ c->saved_grer = __raw_readl(c->regbase + GRER_OFFSET);
+ c->saved_gfer = __raw_readl(c->regbase + GFER_OFFSET);
+
+ /* Clear GPIO transition detect bits */
+ __raw_writel(0xffffffff, c->regbase + GEDR_OFFSET);
+ }
+ return 0;
+}
+
+static int pxa_gpio_resume(struct sys_device *dev)
+{
+ struct pxa_gpio_chip *c;
+ int gpio;
+
+ for_each_gpio_chip(gpio, c) {
+ /* restore level with set/clear */
+ __raw_writel( c->saved_gplr, c->regbase + GPSR_OFFSET);
+ __raw_writel(~c->saved_gplr, c->regbase + GPCR_OFFSET);
+
+ __raw_writel(c->saved_grer, c->regbase + GRER_OFFSET);
+ __raw_writel(c->saved_gfer, c->regbase + GFER_OFFSET);
+ __raw_writel(c->saved_gpdr, c->regbase + GPDR_OFFSET);
+ }
+ return 0;
+}
+#else
+#define pxa_gpio_suspend NULL
+#define pxa_gpio_resume NULL
+#endif
+
+struct sysdev_class pxa_gpio_sysclass = {
+ .name = "gpio",
+ .suspend = pxa_gpio_suspend,
+ .resume = pxa_gpio_resume,
+};
+
+static int __init pxa_gpio_init(void)
+{
+ return sysdev_class_register(&pxa_gpio_sysclass);
+}
+
+core_initcall(pxa_gpio_init);
diff --git a/arch/arm/plat-pxa/include/plat/dma.h b/arch/arm/plat-pxa/include/plat/dma.h
new file mode 100644
index 00000000000..a7b91dc0685
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/dma.h
@@ -0,0 +1,85 @@
+#ifndef __PLAT_DMA_H
+#define __PLAT_DMA_H
+
+#define DMAC_REG(x) (*((volatile u32 *)(DMAC_REGS_VIRT + (x))))
+
+#define DCSR(n) DMAC_REG((n) << 2)
+#define DALGN DMAC_REG(0x00a0) /* DMA Alignment Register */
+#define DINT DMAC_REG(0x00f0) /* DMA Interrupt Register */
+#define DDADR(n) DMAC_REG(0x0200 + ((n) << 4))
+#define DSADR(n) DMAC_REG(0x0204 + ((n) << 4))
+#define DTADR(n) DMAC_REG(0x0208 + ((n) << 4))
+#define DCMD(n) DMAC_REG(0x020c + ((n) << 4))
+#define DRCMR(n) DMAC_REG((((n) < 64) ? 0x0100 : 0x1100) + \
+ (((n) & 0x3f) << 2))
+
+#define DCSR_RUN (1 << 31) /* Run Bit (read / write) */
+#define DCSR_NODESC (1 << 30) /* No-Descriptor Fetch (read / write) */
+#define DCSR_STOPIRQEN (1 << 29) /* Stop Interrupt Enable (read / write) */
+#define DCSR_REQPEND (1 << 8) /* Request Pending (read-only) */
+#define DCSR_STOPSTATE (1 << 3) /* Stop State (read-only) */
+#define DCSR_ENDINTR (1 << 2) /* End Interrupt (read / write) */
+#define DCSR_STARTINTR (1 << 1) /* Start Interrupt (read / write) */
+#define DCSR_BUSERR (1 << 0) /* Bus Error Interrupt (read / write) */
+
+#define DCSR_EORIRQEN (1 << 28) /* End of Receive Interrupt Enable (R/W) */
+#define DCSR_EORJMPEN (1 << 27) /* Jump to next descriptor on EOR */
+#define DCSR_EORSTOPEN (1 << 26) /* STOP on an EOR */
+#define DCSR_SETCMPST (1 << 25) /* Set Descriptor Compare Status */
+#define DCSR_CLRCMPST (1 << 24) /* Clear Descriptor Compare Status */
+#define DCSR_CMPST (1 << 10) /* The Descriptor Compare Status */
+#define DCSR_EORINTR (1 << 9) /* The end of Receive */
+
+#define DRCMR_MAPVLD (1 << 7) /* Map Valid (read / write) */
+#define DRCMR_CHLNUM 0x1f /* mask for Channel Number (read / write) */
+
+#define DDADR_DESCADDR 0xfffffff0 /* Address of next descriptor (mask) */
+#define DDADR_STOP (1 << 0) /* Stop (read / write) */
+
+#define DCMD_INCSRCADDR (1 << 31) /* Source Address Increment Setting. */
+#define DCMD_INCTRGADDR (1 << 30) /* Target Address Increment Setting. */
+#define DCMD_FLOWSRC (1 << 29) /* Flow Control by the source. */
+#define DCMD_FLOWTRG (1 << 28) /* Flow Control by the target. */
+#define DCMD_STARTIRQEN (1 << 22) /* Start Interrupt Enable */
+#define DCMD_ENDIRQEN (1 << 21) /* End Interrupt Enable */
+#define DCMD_ENDIAN (1 << 18) /* Device Endian-ness. */
+#define DCMD_BURST8 (1 << 16) /* 8 byte burst */
+#define DCMD_BURST16 (2 << 16) /* 16 byte burst */
+#define DCMD_BURST32 (3 << 16) /* 32 byte burst */
+#define DCMD_WIDTH1 (1 << 14) /* 1 byte width */
+#define DCMD_WIDTH2 (2 << 14) /* 2 byte width (HalfWord) */
+#define DCMD_WIDTH4 (3 << 14) /* 4 byte width (Word) */
+#define DCMD_LENGTH 0x01fff /* length mask (max = 8K - 1) */
+
+/*
+ * Descriptor structure for PXA's DMA engine
+ * Note: this structure must always be aligned to a 16-byte boundary.
+ */
+
+typedef struct pxa_dma_desc {
+ volatile u32 ddadr; /* Points to the next descriptor + flags */
+ volatile u32 dsadr; /* DSADR value for the current transfer */
+ volatile u32 dtadr; /* DTADR value for the current transfer */
+ volatile u32 dcmd; /* DCMD value for the current transfer */
+} pxa_dma_desc;
+
+typedef enum {
+ DMA_PRIO_HIGH = 0,
+ DMA_PRIO_MEDIUM = 1,
+ DMA_PRIO_LOW = 2
+} pxa_dma_prio;
+
+/*
+ * DMA registration
+ */
+
+int __init pxa_init_dma(int irq, int num_ch);
+
+int pxa_request_dma (char *name,
+ pxa_dma_prio prio,
+ void (*irq_handler)(int, void *),
+ void *data);
+
+void pxa_free_dma (int dma_ch);
+
+#endif /* __PLAT_DMA_H */
diff --git a/arch/arm/plat-pxa/include/plat/gpio.h b/arch/arm/plat-pxa/include/plat/gpio.h
new file mode 100644
index 00000000000..44248cb926a
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/gpio.h
@@ -0,0 +1,62 @@
+#ifndef __PLAT_GPIO_H
+#define __PLAT_GPIO_H
+
+/*
+ * We handle the GPIOs by banks, each bank covers up to 32 GPIOs with
+ * one set of registers. The register offsets are organized below:
+ *
+ * GPLR GPDR GPSR GPCR GRER GFER GEDR
+ * BANK 0 - 0x0000 0x000C 0x0018 0x0024 0x0030 0x003C 0x0048
+ * BANK 1 - 0x0004 0x0010 0x001C 0x0028 0x0034 0x0040 0x004C
+ * BANK 2 - 0x0008 0x0014 0x0020 0x002C 0x0038 0x0044 0x0050
+ *
+ * BANK 3 - 0x0100 0x010C 0x0118 0x0124 0x0130 0x013C 0x0148
+ * BANK 4 - 0x0104 0x0110 0x011C 0x0128 0x0134 0x0140 0x014C
+ * BANK 5 - 0x0108 0x0114 0x0120 0x012C 0x0138 0x0144 0x0150
+ *
+ * NOTE:
+ * BANK 3 is only available on PXA27x and later processors.
+ * BANK 4 and 5 are only available on PXA935
+ */
+
+#define GPIO_BANK(n) (GPIO_REGS_VIRT + BANK_OFF(n))
+
+#define GPLR_OFFSET 0x00
+#define GPDR_OFFSET 0x0C
+#define GPSR_OFFSET 0x18
+#define GPCR_OFFSET 0x24
+#define GRER_OFFSET 0x30
+#define GFER_OFFSET 0x3C
+#define GEDR_OFFSET 0x48
+
+static inline int gpio_get_value(unsigned gpio)
+{
+ if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO))
+ return GPLR(gpio) & GPIO_bit(gpio);
+ else
+ return __gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+ if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO)) {
+ if (value)
+ GPSR(gpio) = GPIO_bit(gpio);
+ else
+ GPCR(gpio) = GPIO_bit(gpio);
+ } else
+ __gpio_set_value(gpio, value);
+}
+
+#define gpio_cansleep __gpio_cansleep
+
+/* NOTE: some PXAs have fewer on-chip GPIOs (like PXA255, with 85).
+ * Those cases currently cause holes in the GPIO number space, the
+ * actual number of the last GPIO is recorded by 'pxa_last_gpio'.
+ */
+extern int pxa_last_gpio;
+
+typedef int (*set_wake_t)(unsigned int irq, unsigned int on);
+
+extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn);
+#endif /* __PLAT_GPIO_H */
diff --git a/arch/arm/plat-pxa/include/plat/mfp.h b/arch/arm/plat-pxa/include/plat/mfp.h
new file mode 100644
index 00000000000..64019464c8d
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/mfp.h
@@ -0,0 +1,399 @@
+/*
+ * arch/arm/plat-pxa/include/plat/mfp.h
+ *
+ * Common Multi-Function Pin Definitions
+ *
+ * Copyright (C) 2007 Marvell International Ltd.
+ *
+ * 2007-8-21: eric miao <eric.miao@marvell.com>
+ * initial version
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_PLAT_MFP_H
+#define __ASM_PLAT_MFP_H
+
+#define mfp_to_gpio(m) ((m) % 128)
+
+/* list of all the configurable MFP pins */
+enum {
+ MFP_PIN_INVALID = -1,
+
+ MFP_PIN_GPIO0 = 0,
+ MFP_PIN_GPIO1,
+ MFP_PIN_GPIO2,
+ MFP_PIN_GPIO3,
+ MFP_PIN_GPIO4,
+ MFP_PIN_GPIO5,
+ MFP_PIN_GPIO6,
+ MFP_PIN_GPIO7,
+ MFP_PIN_GPIO8,
+ MFP_PIN_GPIO9,
+ MFP_PIN_GPIO10,
+ MFP_PIN_GPIO11,
+ MFP_PIN_GPIO12,
+ MFP_PIN_GPIO13,
+ MFP_PIN_GPIO14,
+ MFP_PIN_GPIO15,
+ MFP_PIN_GPIO16,
+ MFP_PIN_GPIO17,
+ MFP_PIN_GPIO18,
+ MFP_PIN_GPIO19,
+ MFP_PIN_GPIO20,
+ MFP_PIN_GPIO21,
+ MFP_PIN_GPIO22,
+ MFP_PIN_GPIO23,
+ MFP_PIN_GPIO24,
+ MFP_PIN_GPIO25,
+ MFP_PIN_GPIO26,
+ MFP_PIN_GPIO27,
+ MFP_PIN_GPIO28,
+ MFP_PIN_GPIO29,
+ MFP_PIN_GPIO30,
+ MFP_PIN_GPIO31,
+ MFP_PIN_GPIO32,
+ MFP_PIN_GPIO33,
+ MFP_PIN_GPIO34,
+ MFP_PIN_GPIO35,
+ MFP_PIN_GPIO36,
+ MFP_PIN_GPIO37,
+ MFP_PIN_GPIO38,
+ MFP_PIN_GPIO39,
+ MFP_PIN_GPIO40,
+ MFP_PIN_GPIO41,
+ MFP_PIN_GPIO42,
+ MFP_PIN_GPIO43,
+ MFP_PIN_GPIO44,
+ MFP_PIN_GPIO45,
+ MFP_PIN_GPIO46,
+ MFP_PIN_GPIO47,
+ MFP_PIN_GPIO48,
+ MFP_PIN_GPIO49,
+ MFP_PIN_GPIO50,
+ MFP_PIN_GPIO51,
+ MFP_PIN_GPIO52,
+ MFP_PIN_GPIO53,
+ MFP_PIN_GPIO54,
+ MFP_PIN_GPIO55,
+ MFP_PIN_GPIO56,
+ MFP_PIN_GPIO57,
+ MFP_PIN_GPIO58,
+ MFP_PIN_GPIO59,
+ MFP_PIN_GPIO60,
+ MFP_PIN_GPIO61,
+ MFP_PIN_GPIO62,
+ MFP_PIN_GPIO63,
+ MFP_PIN_GPIO64,
+ MFP_PIN_GPIO65,
+ MFP_PIN_GPIO66,
+ MFP_PIN_GPIO67,
+ MFP_PIN_GPIO68,
+ MFP_PIN_GPIO69,
+ MFP_PIN_GPIO70,
+ MFP_PIN_GPIO71,
+ MFP_PIN_GPIO72,
+ MFP_PIN_GPIO73,
+ MFP_PIN_GPIO74,
+ MFP_PIN_GPIO75,
+ MFP_PIN_GPIO76,
+ MFP_PIN_GPIO77,
+ MFP_PIN_GPIO78,
+ MFP_PIN_GPIO79,
+ MFP_PIN_GPIO80,
+ MFP_PIN_GPIO81,
+ MFP_PIN_GPIO82,
+ MFP_PIN_GPIO83,
+ MFP_PIN_GPIO84,
+ MFP_PIN_GPIO85,
+ MFP_PIN_GPIO86,
+ MFP_PIN_GPIO87,
+ MFP_PIN_GPIO88,
+ MFP_PIN_GPIO89,
+ MFP_PIN_GPIO90,
+ MFP_PIN_GPIO91,
+ MFP_PIN_GPIO92,
+ MFP_PIN_GPIO93,
+ MFP_PIN_GPIO94,
+ MFP_PIN_GPIO95,
+ MFP_PIN_GPIO96,
+ MFP_PIN_GPIO97,
+ MFP_PIN_GPIO98,
+ MFP_PIN_GPIO99,
+ MFP_PIN_GPIO100,
+ MFP_PIN_GPIO101,
+ MFP_PIN_GPIO102,
+ MFP_PIN_GPIO103,
+ MFP_PIN_GPIO104,
+ MFP_PIN_GPIO105,
+ MFP_PIN_GPIO106,
+ MFP_PIN_GPIO107,
+ MFP_PIN_GPIO108,
+ MFP_PIN_GPIO109,
+ MFP_PIN_GPIO110,
+ MFP_PIN_GPIO111,
+ MFP_PIN_GPIO112,
+ MFP_PIN_GPIO113,
+ MFP_PIN_GPIO114,
+ MFP_PIN_GPIO115,
+ MFP_PIN_GPIO116,
+ MFP_PIN_GPIO117,
+ MFP_PIN_GPIO118,
+ MFP_PIN_GPIO119,
+ MFP_PIN_GPIO120,
+ MFP_PIN_GPIO121,
+ MFP_PIN_GPIO122,
+ MFP_PIN_GPIO123,
+ MFP_PIN_GPIO124,
+ MFP_PIN_GPIO125,
+ MFP_PIN_GPIO126,
+ MFP_PIN_GPIO127,
+ MFP_PIN_GPIO0_2,
+ MFP_PIN_GPIO1_2,
+ MFP_PIN_GPIO2_2,
+ MFP_PIN_GPIO3_2,
+ MFP_PIN_GPIO4_2,
+ MFP_PIN_GPIO5_2,
+ MFP_PIN_GPIO6_2,
+ MFP_PIN_GPIO7_2,
+ MFP_PIN_GPIO8_2,
+ MFP_PIN_GPIO9_2,
+ MFP_PIN_GPIO10_2,
+ MFP_PIN_GPIO11_2,
+ MFP_PIN_GPIO12_2,
+ MFP_PIN_GPIO13_2,
+ MFP_PIN_GPIO14_2,
+ MFP_PIN_GPIO15_2,
+ MFP_PIN_GPIO16_2,
+ MFP_PIN_GPIO17_2,
+
+ MFP_PIN_ULPI_STP,
+ MFP_PIN_ULPI_NXT,
+ MFP_PIN_ULPI_DIR,
+
+ MFP_PIN_nXCVREN,
+ MFP_PIN_DF_CLE_nOE,
+ MFP_PIN_DF_nADV1_ALE,
+ MFP_PIN_DF_SCLK_E,
+ MFP_PIN_DF_SCLK_S,
+ MFP_PIN_nBE0,
+ MFP_PIN_nBE1,
+ MFP_PIN_DF_nADV2_ALE,
+ MFP_PIN_DF_INT_RnB,
+ MFP_PIN_DF_nCS0,
+ MFP_PIN_DF_nCS1,
+ MFP_PIN_nLUA,
+ MFP_PIN_nLLA,
+ MFP_PIN_DF_nWE,
+ MFP_PIN_DF_ALE_nWE,
+ MFP_PIN_DF_nRE_nOE,
+ MFP_PIN_DF_ADDR0,
+ MFP_PIN_DF_ADDR1,
+ MFP_PIN_DF_ADDR2,
+ MFP_PIN_DF_ADDR3,
+ MFP_PIN_DF_IO0,
+ MFP_PIN_DF_IO1,
+ MFP_PIN_DF_IO2,
+ MFP_PIN_DF_IO3,
+ MFP_PIN_DF_IO4,
+ MFP_PIN_DF_IO5,
+ MFP_PIN_DF_IO6,
+ MFP_PIN_DF_IO7,
+ MFP_PIN_DF_IO8,
+ MFP_PIN_DF_IO9,
+ MFP_PIN_DF_IO10,
+ MFP_PIN_DF_IO11,
+ MFP_PIN_DF_IO12,
+ MFP_PIN_DF_IO13,
+ MFP_PIN_DF_IO14,
+ MFP_PIN_DF_IO15,
+ MFP_PIN_DF_nCS0_SM_nCS2,
+ MFP_PIN_DF_nCS1_SM_nCS3,
+ MFP_PIN_SM_nCS0,
+ MFP_PIN_SM_nCS1,
+ MFP_PIN_DF_WEn,
+ MFP_PIN_DF_REn,
+ MFP_PIN_DF_CLE_SM_OEn,
+ MFP_PIN_DF_ALE_SM_WEn,
+ MFP_PIN_DF_RDY0,
+ MFP_PIN_DF_RDY1,
+
+ MFP_PIN_SM_SCLK,
+ MFP_PIN_SM_BE0,
+ MFP_PIN_SM_BE1,
+ MFP_PIN_SM_ADV,
+ MFP_PIN_SM_ADVMUX,
+ MFP_PIN_SM_RDY,
+
+ MFP_PIN_MMC1_DAT7,
+ MFP_PIN_MMC1_DAT6,
+ MFP_PIN_MMC1_DAT5,
+ MFP_PIN_MMC1_DAT4,
+ MFP_PIN_MMC1_DAT3,
+ MFP_PIN_MMC1_DAT2,
+ MFP_PIN_MMC1_DAT1,
+ MFP_PIN_MMC1_DAT0,
+ MFP_PIN_MMC1_CMD,
+ MFP_PIN_MMC1_CLK,
+ MFP_PIN_MMC1_CD,
+ MFP_PIN_MMC1_WP,
+
+ /* additional pins on PXA930 */
+ MFP_PIN_GSIM_UIO,
+ MFP_PIN_GSIM_UCLK,
+ MFP_PIN_GSIM_UDET,
+ MFP_PIN_GSIM_nURST,
+ MFP_PIN_PMIC_INT,
+ MFP_PIN_RDY,
+
+ MFP_PIN_MAX,
+};
+
+/*
+ * a possible MFP configuration is represented by a 32-bit integer
+ *
+ * bit 0.. 9 - MFP Pin Number (1024 Pins Maximum)
+ * bit 10..12 - Alternate Function Selection
+ * bit 13..15 - Drive Strength
+ * bit 16..18 - Low Power Mode State
+ * bit 19..20 - Low Power Mode Edge Detection
+ * bit 21..22 - Run Mode Pull State
+ *
+ * to facilitate the definition, the following macros are provided
+ *
+ * MFP_CFG_DEFAULT - default MFP configuration value, with
+ * alternate function = 0,
+ * drive strength = fast 3mA (MFP_DS03X)
+ * low power mode = default
+ * edge detection = none
+ *
+ * MFP_CFG - default MFPR value with alternate function
+ * MFP_CFG_DRV - default MFPR value with alternate function and
+ * pin drive strength
+ * MFP_CFG_LPM - default MFPR value with alternate function and
+ * low power mode
+ * MFP_CFG_X - default MFPR value with alternate function,
+ * pin drive strength and low power mode
+ */
+
+typedef unsigned long mfp_cfg_t;
+
+#define MFP_PIN(x) ((x) & 0x3ff)
+
+#define MFP_AF0 (0x0 << 10)
+#define MFP_AF1 (0x1 << 10)
+#define MFP_AF2 (0x2 << 10)
+#define MFP_AF3 (0x3 << 10)
+#define MFP_AF4 (0x4 << 10)
+#define MFP_AF5 (0x5 << 10)
+#define MFP_AF6 (0x6 << 10)
+#define MFP_AF7 (0x7 << 10)
+#define MFP_AF_MASK (0x7 << 10)
+#define MFP_AF(x) (((x) >> 10) & 0x7)
+
+#define MFP_DS01X (0x0 << 13)
+#define MFP_DS02X (0x1 << 13)
+#define MFP_DS03X (0x2 << 13)
+#define MFP_DS04X (0x3 << 13)
+#define MFP_DS06X (0x4 << 13)
+#define MFP_DS08X (0x5 << 13)
+#define MFP_DS10X (0x6 << 13)
+#define MFP_DS13X (0x7 << 13)
+#define MFP_DS_MASK (0x7 << 13)
+#define MFP_DS(x) (((x) >> 13) & 0x7)
+
+#define MFP_LPM_DEFAULT (0x0 << 16)
+#define MFP_LPM_DRIVE_LOW (0x1 << 16)
+#define MFP_LPM_DRIVE_HIGH (0x2 << 16)
+#define MFP_LPM_PULL_LOW (0x3 << 16)
+#define MFP_LPM_PULL_HIGH (0x4 << 16)
+#define MFP_LPM_FLOAT (0x5 << 16)
+#define MFP_LPM_INPUT (0x6 << 16)
+#define MFP_LPM_STATE_MASK (0x7 << 16)
+#define MFP_LPM_STATE(x) (((x) >> 16) & 0x7)
+
+#define MFP_LPM_EDGE_NONE (0x0 << 19)
+#define MFP_LPM_EDGE_RISE (0x1 << 19)
+#define MFP_LPM_EDGE_FALL (0x2 << 19)
+#define MFP_LPM_EDGE_BOTH (0x3 << 19)
+#define MFP_LPM_EDGE_MASK (0x3 << 19)
+#define MFP_LPM_EDGE(x) (((x) >> 19) & 0x3)
+
+#define MFP_PULL_NONE (0x0 << 21)
+#define MFP_PULL_LOW (0x1 << 21)
+#define MFP_PULL_HIGH (0x2 << 21)
+#define MFP_PULL_BOTH (0x3 << 21)
+#define MFP_PULL_MASK (0x3 << 21)
+#define MFP_PULL(x) (((x) >> 21) & 0x3)
+
+#define MFP_CFG_DEFAULT (MFP_AF0 | MFP_DS03X | MFP_LPM_DEFAULT |\
+ MFP_LPM_EDGE_NONE | MFP_PULL_NONE)
+
+#define MFP_CFG(pin, af) \
+ ((MFP_CFG_DEFAULT & ~MFP_AF_MASK) |\
+ (MFP_PIN(MFP_PIN_##pin) | MFP_##af))
+
+#define MFP_CFG_DRV(pin, af, drv) \
+ ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK)) |\
+ (MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv))
+
+#define MFP_CFG_LPM(pin, af, lpm) \
+ ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_LPM_STATE_MASK)) |\
+ (MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_LPM_##lpm))
+
+#define MFP_CFG_X(pin, af, drv, lpm) \
+ ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK | MFP_LPM_STATE_MASK)) |\
+ (MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv | MFP_LPM_##lpm))
+
+#if defined(CONFIG_PXA3xx) || defined(CONFIG_ARCH_MMP)
+/*
+ * each MFP pin will have a MFPR register, since the offset of the
+ * register varies between processors, the processor specific code
+ * should initialize the pin offsets by mfp_init()
+ *
+ * mfp_init_base() - accepts a virtual base for all MFPR registers and
+ * initialize the MFP table to a default state
+ *
+ * mfp_init_addr() - accepts a table of "mfp_addr_map" structure, which
+ * represents a range of MFP pins from "start" to "end", with the offset
+ * begining at "offset", to define a single pin, let "end" = -1.
+ *
+ * use
+ *
+ * MFP_ADDR_X() to define a range of pins
+ * MFP_ADDR() to define a single pin
+ * MFP_ADDR_END to signal the end of pin offset definitions
+ */
+struct mfp_addr_map {
+ unsigned int start;
+ unsigned int end;
+ unsigned long offset;
+};
+
+#define MFP_ADDR_X(start, end, offset) \
+ { MFP_PIN_##start, MFP_PIN_##end, offset }
+
+#define MFP_ADDR(pin, offset) \
+ { MFP_PIN_##pin, -1, offset }
+
+#define MFP_ADDR_END { MFP_PIN_INVALID, 0 }
+
+void __init mfp_init_base(unsigned long mfpr_base);
+void __init mfp_init_addr(struct mfp_addr_map *map);
+
+/*
+ * mfp_{read, write}() - for direct read/write access to the MFPR register
+ * mfp_config() - for configuring a group of MFPR registers
+ * mfp_config_lpm() - configuring all low power MFPR registers for suspend
+ * mfp_config_run() - configuring all run time MFPR registers after resume
+ */
+unsigned long mfp_read(int mfp);
+void mfp_write(int mfp, unsigned long mfpr_val);
+void mfp_config(unsigned long *mfp_cfgs, int num);
+void mfp_config_run(void);
+void mfp_config_lpm(void);
+#endif /* CONFIG_PXA3xx || CONFIG_ARCH_MMP */
+
+#endif /* __ASM_PLAT_MFP_H */
diff --git a/arch/arm/plat-pxa/mfp.c b/arch/arm/plat-pxa/mfp.c
new file mode 100644
index 00000000000..e716c622a17
--- /dev/null
+++ b/arch/arm/plat-pxa/mfp.c
@@ -0,0 +1,278 @@
+/*
+ * linux/arch/arm/plat-pxa/mfp.c
+ *
+ * Multi-Function Pin Support
+ *
+ * Copyright (C) 2007 Marvell Internation Ltd.
+ *
+ * 2007-08-21: eric miao <eric.miao@marvell.com>
+ * initial version
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/sysdev.h>
+
+#include <plat/mfp.h>
+
+#define MFPR_SIZE (PAGE_SIZE)
+
+/* MFPR register bit definitions */
+#define MFPR_PULL_SEL (0x1 << 15)
+#define MFPR_PULLUP_EN (0x1 << 14)
+#define MFPR_PULLDOWN_EN (0x1 << 13)
+#define MFPR_SLEEP_SEL (0x1 << 9)
+#define MFPR_SLEEP_OE_N (0x1 << 7)
+#define MFPR_EDGE_CLEAR (0x1 << 6)
+#define MFPR_EDGE_FALL_EN (0x1 << 5)
+#define MFPR_EDGE_RISE_EN (0x1 << 4)
+
+#define MFPR_SLEEP_DATA(x) ((x) << 8)
+#define MFPR_DRIVE(x) (((x) & 0x7) << 10)
+#define MFPR_AF_SEL(x) (((x) & 0x7) << 0)
+
+#define MFPR_EDGE_NONE (0)
+#define MFPR_EDGE_RISE (MFPR_EDGE_RISE_EN)
+#define MFPR_EDGE_FALL (MFPR_EDGE_FALL_EN)
+#define MFPR_EDGE_BOTH (MFPR_EDGE_RISE | MFPR_EDGE_FALL)
+
+/*
+ * Table that determines the low power modes outputs, with actual settings
+ * used in parentheses for don't-care values. Except for the float output,
+ * the configured driven and pulled levels match, so if there is a need for
+ * non-LPM pulled output, the same configuration could probably be used.
+ *
+ * Output value sleep_oe_n sleep_data pullup_en pulldown_en pull_sel
+ * (bit 7) (bit 8) (bit 14) (bit 13) (bit 15)
+ *
+ * Input 0 X(0) X(0) X(0) 0
+ * Drive 0 0 0 0 X(1) 0
+ * Drive 1 0 1 X(1) 0 0
+ * Pull hi (1) 1 X(1) 1 0 0
+ * Pull lo (0) 1 X(0) 0 1 0
+ * Z (float) 1 X(0) 0 0 0
+ */
+#define MFPR_LPM_INPUT (0)
+#define MFPR_LPM_DRIVE_LOW (MFPR_SLEEP_DATA(0) | MFPR_PULLDOWN_EN)
+#define MFPR_LPM_DRIVE_HIGH (MFPR_SLEEP_DATA(1) | MFPR_PULLUP_EN)
+#define MFPR_LPM_PULL_LOW (MFPR_LPM_DRIVE_LOW | MFPR_SLEEP_OE_N)
+#define MFPR_LPM_PULL_HIGH (MFPR_LPM_DRIVE_HIGH | MFPR_SLEEP_OE_N)
+#define MFPR_LPM_FLOAT (MFPR_SLEEP_OE_N)
+#define MFPR_LPM_MASK (0xe080)
+
+/*
+ * The pullup and pulldown state of the MFP pin at run mode is by default
+ * determined by the selected alternate function. In case that some buggy
+ * devices need to override this default behavior, the definitions below
+ * indicates the setting of corresponding MFPR bits
+ *
+ * Definition pull_sel pullup_en pulldown_en
+ * MFPR_PULL_NONE 0 0 0
+ * MFPR_PULL_LOW 1 0 1
+ * MFPR_PULL_HIGH 1 1 0
+ * MFPR_PULL_BOTH 1 1 1
+ */
+#define MFPR_PULL_NONE (0)
+#define MFPR_PULL_LOW (MFPR_PULL_SEL | MFPR_PULLDOWN_EN)
+#define MFPR_PULL_BOTH (MFPR_PULL_LOW | MFPR_PULLUP_EN)
+#define MFPR_PULL_HIGH (MFPR_PULL_SEL | MFPR_PULLUP_EN)
+
+/* mfp_spin_lock is used to ensure that MFP register configuration
+ * (most likely a read-modify-write operation) is atomic, and that
+ * mfp_table[] is consistent
+ */
+static DEFINE_SPINLOCK(mfp_spin_lock);
+
+static void __iomem *mfpr_mmio_base;
+
+struct mfp_pin {
+ unsigned long config; /* -1 for not configured */
+ unsigned long mfpr_off; /* MFPRxx Register offset */
+ unsigned long mfpr_run; /* Run-Mode Register Value */
+ unsigned long mfpr_lpm; /* Low Power Mode Register Value */
+};
+
+static struct mfp_pin mfp_table[MFP_PIN_MAX];
+
+/* mapping of MFP_LPM_* definitions to MFPR_LPM_* register bits */
+static const unsigned long mfpr_lpm[] = {
+ MFPR_LPM_INPUT,
+ MFPR_LPM_DRIVE_LOW,
+ MFPR_LPM_DRIVE_HIGH,
+ MFPR_LPM_PULL_LOW,
+ MFPR_LPM_PULL_HIGH,
+ MFPR_LPM_FLOAT,
+};
+
+/* mapping of MFP_PULL_* definitions to MFPR_PULL_* register bits */
+static const unsigned long mfpr_pull[] = {
+ MFPR_PULL_NONE,
+ MFPR_PULL_LOW,
+ MFPR_PULL_HIGH,
+ MFPR_PULL_BOTH,
+};
+
+/* mapping of MFP_LPM_EDGE_* definitions to MFPR_EDGE_* register bits */
+static const unsigned long mfpr_edge[] = {
+ MFPR_EDGE_NONE,
+ MFPR_EDGE_RISE,
+ MFPR_EDGE_FALL,
+ MFPR_EDGE_BOTH,
+};
+
+#define mfpr_readl(off) \
+ __raw_readl(mfpr_mmio_base + (off))
+
+#define mfpr_writel(off, val) \
+ __raw_writel(val, mfpr_mmio_base + (off))
+
+#define mfp_configured(p) ((p)->config != -1)
+
+/*
+ * perform a read-back of any MFPR register to make sure the
+ * previous writings are finished
+ */
+#define mfpr_sync() (void)__raw_readl(mfpr_mmio_base + 0)
+
+static inline void __mfp_config_run(struct mfp_pin *p)
+{
+ if (mfp_configured(p))
+ mfpr_writel(p->mfpr_off, p->mfpr_run);
+}
+
+static inline void __mfp_config_lpm(struct mfp_pin *p)
+{
+ if (mfp_configured(p)) {
+ unsigned long mfpr_clr = (p->mfpr_run & ~MFPR_EDGE_BOTH) | MFPR_EDGE_CLEAR;
+ if (mfpr_clr != p->mfpr_run)
+ mfpr_writel(p->mfpr_off, mfpr_clr);
+ if (p->mfpr_lpm != mfpr_clr)
+ mfpr_writel(p->mfpr_off, p->mfpr_lpm);
+ }
+}
+
+void mfp_config(unsigned long *mfp_cfgs, int num)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&mfp_spin_lock, flags);
+
+ for (i = 0; i < num; i++, mfp_cfgs++) {
+ unsigned long tmp, c = *mfp_cfgs;
+ struct mfp_pin *p;
+ int pin, af, drv, lpm, edge, pull;
+
+ pin = MFP_PIN(c);
+ BUG_ON(pin >= MFP_PIN_MAX);
+ p = &mfp_table[pin];
+
+ af = MFP_AF(c);
+ drv = MFP_DS(c);
+ lpm = MFP_LPM_STATE(c);
+ edge = MFP_LPM_EDGE(c);
+ pull = MFP_PULL(c);
+
+ /* run-mode pull settings will conflict with MFPR bits of
+ * low power mode state, calculate mfpr_run and mfpr_lpm
+ * individually if pull != MFP_PULL_NONE
+ */
+ tmp = MFPR_AF_SEL(af) | MFPR_DRIVE(drv);
+
+ if (likely(pull == MFP_PULL_NONE)) {
+ p->mfpr_run = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];
+ p->mfpr_lpm = p->mfpr_run;
+ } else {
+ p->mfpr_lpm = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];
+ p->mfpr_run = tmp | mfpr_pull[pull];
+ }
+
+ p->config = c; __mfp_config_run(p);
+ }
+
+ mfpr_sync();
+ spin_unlock_irqrestore(&mfp_spin_lock, flags);
+}
+
+unsigned long mfp_read(int mfp)
+{
+ unsigned long val, flags;
+
+ BUG_ON(mfp >= MFP_PIN_MAX);
+
+ spin_lock_irqsave(&mfp_spin_lock, flags);
+ val = mfpr_readl(mfp_table[mfp].mfpr_off);
+ spin_unlock_irqrestore(&mfp_spin_lock, flags);
+
+ return val;
+}
+
+void mfp_write(int mfp, unsigned long val)
+{
+ unsigned long flags;
+
+ BUG_ON(mfp >= MFP_PIN_MAX);
+
+ spin_lock_irqsave(&mfp_spin_lock, flags);
+ mfpr_writel(mfp_table[mfp].mfpr_off, val);
+ mfpr_sync();
+ spin_unlock_irqrestore(&mfp_spin_lock, flags);
+}
+
+void __init mfp_init_base(unsigned long mfpr_base)
+{
+ int i;
+
+ /* initialize the table with default - unconfigured */
+ for (i = 0; i < ARRAY_SIZE(mfp_table); i++)
+ mfp_table[i].config = -1;
+
+ mfpr_mmio_base = (void __iomem *)mfpr_base;
+}
+
+void __init mfp_init_addr(struct mfp_addr_map *map)
+{
+ struct mfp_addr_map *p;
+ unsigned long offset, flags;
+ int i;
+
+ spin_lock_irqsave(&mfp_spin_lock, flags);
+
+ for (p = map; p->start != MFP_PIN_INVALID; p++) {
+ offset = p->offset;
+ i = p->start;
+
+ do {
+ mfp_table[i].mfpr_off = offset;
+ mfp_table[i].mfpr_run = 0;
+ mfp_table[i].mfpr_lpm = 0;
+ offset += 4; i++;
+ } while ((i <= p->end) && (p->end != -1));
+ }
+
+ spin_unlock_irqrestore(&mfp_spin_lock, flags);
+}
+
+void mfp_config_lpm(void)
+{
+ struct mfp_pin *p = &mfp_table[0];
+ int pin;
+
+ for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++, p++)
+ __mfp_config_lpm(p);
+}
+
+void mfp_config_run(void)
+{
+ struct mfp_pin *p = &mfp_table[0];
+ int pin;
+
+ for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++, p++)
+ __mfp_config_run(p);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 01:49:06 +0000