/*
* linux/arch/arm/common/locomo.c
*
* Sharp LoCoMo support
*
* 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.
*
* This file contains all generic LoCoMo support.
*
* All initialization functions provided here are intended to be called
* from machine specific code with proper arguments when required.
*
* Based on sa1111.c
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/hardware/locomo.h>
/* M62332 output channel selection */
#define M62332_EVR_CH 1 /* M62332 volume channel number */
/* 0 : CH.1 , 1 : CH. 2 */
/* DAC send data */
#define M62332_SLAVE_ADDR 0x4e /* Slave address */
#define M62332_W_BIT 0x00 /* W bit (0 only) */
#define M62332_SUB_ADDR 0x00 /* Sub address */
#define M62332_A_BIT 0x00 /* A bit (0 only) */
/* DAC setup and hold times (expressed in us) */
#define DAC_BUS_FREE_TIME 5 /* 4.7 us */
#define DAC_START_SETUP_TIME 5 /* 4.7 us */
#define DAC_STOP_SETUP_TIME 4 /* 4.0 us */
#define DAC_START_HOLD_TIME 5 /* 4.7 us */
#define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */
#define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */
#define DAC_DATA_SETUP_TIME 1 /* 250 ns */
#define DAC_DATA_HOLD_TIME 1 /* 300 ns */
#define DAC_LOW_SETUP_TIME 1 /* 300 ns */
#define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */
/* the following is the overall data for the locomo chip */
struct locomo {
struct device *dev;
unsigned long phys;
unsigned int irq;
spinlock_t lock;
void __iomem *base;
};
struct locomo_dev_info {
unsigned long offset;
unsigned long length;
unsigned int devid;
unsigned int irq[1];
const char * name;
};
/* All the locomo devices. If offset is non-zero, the mapbase for the
* locomo_dev will be set to the chip base plus offset. If offset is
* zero, then the mapbase for the locomo_dev will be set to zero. An
* offset of zero means the device only uses GPIOs or other helper
* functions inside this file */
static struct locomo_dev_info locomo_devices[] = {
{
.devid = LOCOMO_DEVID_KEYBOARD,
.irq = {
IRQ_LOCOMO_KEY,
},
.name = "locomo-keyboard",
.offset = LOCOMO_KEYBOARD,
.length = 16,
},
{
.devid = LOCOMO_DEVID_FRONTLIGHT,
.irq = {},
.name = "locomo-frontlight",
.offset = LOCOMO_FRONTLIGHT,
.length = 8,
},
{
.devid = LOCOMO_DEVID_BACKLIGHT,
.irq = {},
.name = "locomo-backlight",
.offset = LOCOMO_BACKLIGHT,
.length = 8,
},
{
.devid = LOCOMO_DEVID_AUDIO,
.irq = {},
.name = "locomo-audio",
.offset = LOCOMO_AUDIO,
.length = 4,
},
{
.devid = LOCOMO_DEVID_LED,
.irq = {},
.name = "locomo-led",
.offset = LOCOMO_LED,
.length = 8,
},
{
.devid = LOCOMO_DEVID_UART,
.irq = {},
.name = "locomo-uart",
.offset = 0,
.length = 0,
},
};
/** LoCoMo interrupt handling stuff.
* NOTE: LoCoMo has a 1 to many mapping on all of its IRQs.
* that is, there is only one real hardware interrupt
* we determine which interrupt it is by reading some IO memory.
* We have two levels of expansion, first in the handler for the
* hardware interrupt we generate an interrupt
* IRQ_LOCOMO_*_BASE and those handlers generate more interrupts
*
* hardware irq reads LOCOMO_ICR & 0x0f00
* IRQ_LOCOMO_KEY_BASE
* IRQ_LOCOMO_GPIO_BASE
* IRQ_LOCOMO_LT_BASE
* IRQ_LOCOMO_SPI_BASE
* IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001
* IRQ_LOCOMO_KEY
* IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff
* IRQ_LOCOMO_GPIO[0-15]
* IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001
* IRQ_LOCOMO_LT
* IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F
* IRQ_LOCOMO_SPI_RFR
* IRQ_LOCOMO_SPI_RFW
* IRQ_LOCOMO_SPI_OVRN
* IRQ_LOCOMO_SPI_TEND
*/
#define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE)
#define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY)
#define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0)
#define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT)
#define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR)
static void locomo_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
int req, i;
struct irqdesc *d;
void __iomem *mapbase = get_irq_chipdata(irq);
/* Acknowledge the parent IRQ */
desc->chip->ack(irq);
/* check why this interrupt was generated */
req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00;
if (req) {
/* generate the next interrupt(s) */
irq = LOCOMO_IRQ_START;
d = irq_desc + irq;
for (i = 0; i <= 3; i++, d++, irq++) {
if (req & (0x0100 << i)) {
desc_handle_irq(irq, d, regs);
}
}
}
}
static void locomo_ack_irq(unsigned int irq)
{
}
static void locomo_mask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_ICR);
r &= ~(0x0010 << (irq - LOCOMO_IRQ_START));
locomo_writel(r, mapbase + LOCOMO_ICR);
}
static void locomo_unmask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_ICR);
r |= (0x0010 << (irq - LOCOMO_IRQ_START));
locomo_writel(r, mapbase + LOCOMO_ICR);
}
static struct irqchip locomo_chip = {
.ack = locomo_ack_irq,
.mask = locomo_mask_irq,
.unmask = locomo_unmask_irq,
};
static void locomo_key_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
struct irqdesc *d;
void __iomem *mapbase = get_irq_chipdata(irq);
if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
d = irq_desc + LOCOMO_IRQ_KEY_START;
desc_handle_irq(LOCOMO_IRQ_KEY_START, d, regs);
}
}
static void locomo_key_ack_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START));
locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
}
static void locomo_key_mask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START));
locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
}
static void locomo_key_unmask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START));
locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC);
}
static struct irqchip locomo_key_chip = {
.ack = locomo_key_ack_irq,
.mask = locomo_key_mask_irq,
.unmask = locomo_key_unmask_irq,
};
static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
int req, i;
struct irqdesc *d;
void __iomem *mapbase = get_irq_chipdata(irq);
req = locomo_readl(mapbase + LOCOMO_GIR) &
locomo_readl(mapbase + LOCOMO_GPD) &
0xffff;
if (req) {
irq = LOCOMO_IRQ_GPIO_START;
d = irq_desc + LOCOMO_IRQ_GPIO_START;
for (i = 0; i <= 15; i++, irq++, d++) {
if (req & (0x0001 << i)) {
desc_handle_irq(irq, d, regs);
}
}
}
}
static void locomo_gpio_ack_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_GWE);
r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
locomo_writel(r, mapbase + LOCOMO_GWE);
r = locomo_readl(mapbase + LOCOMO_GIS);
r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
locomo_writel(r, mapbase + LOCOMO_GIS);
r = locomo_readl(mapbase + LOCOMO_GWE);
r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
locomo_writel(r, mapbase + LOCOMO_GWE);
}
static void locomo_gpio_mask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_GIE);
r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
locomo_writel(r, mapbase + LOCOMO_GIE);
}
static void locomo_gpio_unmask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_GIE);
r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START));
locomo_writel(r, mapbase + LOCOMO_GIE);
}
static struct irqchip locomo_gpio_chip = {
.ack = locomo_gpio_ack_irq,
.mask = locomo_gpio_mask_irq,
.unmask = locomo_gpio_unmask_irq,
};
static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
struct irqdesc *d;
void __iomem *mapbase = get_irq_chipdata(irq);
if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
d = irq_desc + LOCOMO_IRQ_LT_START;
desc_handle_irq(LOCOMO_IRQ_LT_START, d, regs);
}
}
static void locomo_lt_ack_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_LTINT);
r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START));
locomo_writel(r, mapbase + LOCOMO_LTINT);
}
static void locomo_lt_mask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_LTINT);
r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START));
locomo_writel(r, mapbase + LOCOMO_LTINT);
}
static void locomo_lt_unmask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_LTINT);
r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START));
locomo_writel(r, mapbase + LOCOMO_LTINT);
}
static struct irqchip locomo_lt_chip = {
.ack = locomo_lt_ack_irq,
.mask = locomo_lt_mask_irq,
.unmask = locomo_lt_unmask_irq,
};
static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
int req, i;
struct irqdesc *d;
void __iomem *mapbase = get_irq_chipdata(irq);
req = locomo_readl(mapbase + LOCOMO_SPIIR) & 0x000F;
if (req) {
irq = LOCOMO_IRQ_SPI_START;
d = irq_desc + irq;
for (i = 0; i <= 3; i++, irq++, d++) {
if (req & (0x0001 << i)) {
desc_handle_irq(irq, d, regs);
}
}
}
}
static void locomo_spi_ack_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_SPIWE);
r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
locomo_writel(r, mapbase + LOCOMO_SPIWE);
r = locomo_readl(mapbase + LOCOMO_SPIIS);
r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
locomo_writel(r, mapbase + LOCOMO_SPIIS);
r = locomo_readl(mapbase + LOCOMO_SPIWE);
r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
locomo_writel(r, mapbase + LOCOMO_SPIWE);
}
static void locomo_spi_mask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_SPIIE);
r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START));
locomo_writel(r, mapbase + LOCOMO_SPIIE);
}
static void locomo_spi_unmask_irq(unsigned int irq)
{
void __iomem *mapbase = get_irq_chipdata(irq);
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_SPIIE);
r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START));
locomo_writel(r, mapbase + LOCOMO_SPIIE);
}
static struct irqchip locomo_spi_chip = {
.ack = locomo_spi_ack_irq,
.mask = locomo_spi_mask_irq,
.unmask = locomo_spi_unmask_irq,
};
static void locomo_setup_irq(struct locomo *lchip)
{
int irq;
void __iomem *irqbase = lchip->base;
/*
* Install handler for IRQ_LOCOMO_HW.
*/
set_irq_type(lchip->irq, IRQT_FALLING);
set_irq_chipdata(lchip->irq, irqbase);
set_irq_chained_handler(lchip->irq, locomo_handler);
/* Install handlers for IRQ_LOCOMO_*_BASE */
set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip);
set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase);
set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler);
set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE);
set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip);
set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase);
set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler);
set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE);
set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip);
set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase);
set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler);
set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE);
set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip);
set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase);
set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler);
set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE);
/* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */
set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip);
set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase);
set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ);
set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE);
/* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */
for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) {
set_irq_chip(irq, &locomo_gpio_chip);
set_irq_chipdata(irq, irqbase);
set_irq_handler(irq, do_edge_IRQ);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
/* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */
set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip);
set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase);
set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ);
set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE);
/* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */
for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) {
set_irq_chip(irq, &locomo_spi_chip);
set_irq_chipdata(irq, irqbase);
set_irq_handler(irq, do_edge_IRQ);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
}
static void locomo_dev_release(struct device *_dev)
{
struct locomo_dev *dev = LOCOMO_DEV(_dev);
kfree(dev);
}
static int
locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info)
{
struct locomo_dev *dev;
int ret;
dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL);
if (!dev) {
ret = -ENOMEM;
goto out;
}
strncpy(dev->dev.bus_id,info->name,sizeof(dev->dev.bus_id));
/*
* If the parent device has a DMA mask associated with it,
* propagate it down to the children.
*/
if (lchip->dev->dma_mask) {
dev->dma_mask = *lchip->dev->dma_mask;
dev->dev.dma_mask = &dev->dma_mask;
}
dev->devid = info->devid;
dev->dev.parent = lchip->dev;
dev->dev.bus = &locomo_bus_type;
dev->dev.release = locomo_dev_release;
dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask;
if (info->offset)
dev->mapbase = lchip->base + info->offset;
else
dev->mapbase = 0;
dev->length = info->length;
memmove(dev->irq, info->irq, sizeof(dev->irq));
ret = device_register(&dev->dev);
if (ret) {
out:
kfree(dev);
}
return ret;
}
#ifdef CONFIG_PM
struct locomo_save_data {
u16 LCM_GPO;
u16 LCM_SPICT;
u16 LCM_GPE;
u16 LCM_ASD;
u16 LCM_SPIMD;
};
static int locomo_suspend(struct platform_device *dev, pm_message_t state)
{
struct locomo *lchip = platform_get_drvdata(dev);
struct locomo_save_data *save;
unsigned long flags;
save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL);
if (!save)
return -ENOMEM;
dev->dev.power.saved_state = (void *) save;
spin_lock_irqsave(&lchip->lock, flags);
save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */
locomo_writel(0x00, lchip->base + LOCOMO_GPO);
save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */
locomo_writel(0x40, lchip->base + LOCOMO_SPICT);
save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */
locomo_writel(0x00, lchip->base + LOCOMO_GPE);
save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */
locomo_writel(0x00, lchip->base + LOCOMO_ASD);
save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */
locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD);
locomo_writel(0x00, lchip->base + LOCOMO_PAIF);
locomo_writel(0x00, lchip->base + LOCOMO_DAC);
locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC);
if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) )
locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */
else
/* 18MHz already enabled, so no wait */
locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */
locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/
locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */
locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */
spin_unlock_irqrestore(&lchip->lock, flags);
return 0;
}
static int locomo_resume(struct platform_device *dev)
{
struct locomo *lchip = platform_get_drvdata(dev);
struct locomo_save_data *save;
unsigned long r;
unsigned long flags;
save = (struct locomo_save_data *) dev->dev.power.saved_state;
if (!save)
return 0;
spin_lock_irqsave(&lchip->lock, flags);
locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO);
locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT);
locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE);
locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD);
locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD);
locomo_writel(0x00, lchip->base + LOCOMO_C32K);
locomo_writel(0x90, lchip->base + LOCOMO_TADC);
locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC);
r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
r &= 0xFEFF;
locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD);
spin_unlock_irqrestore(&lchip->lock, flags);
kfree(save);
return 0;
}
#endif
/**
* locomo_probe - probe for a single LoCoMo chip.
* @phys_addr: physical address of device.
*
* Probe for a LoCoMo chip. This must be called
* before any other locomo-specific code.
*
* Returns:
* %-ENODEV device not found.
* %-EBUSY physical address already marked in-use.
* %0 successful.
*/
static int
__locomo_probe(struct device *me, struct resource *mem, int irq)
{
struct locomo *lchip;
unsigned long r;
int i, ret = -ENODEV;
lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL);
if (!lchip)
return -ENOMEM;
spin_lock_init(&lchip->lock);
lchip->dev = me;
dev_set_drvdata(lchip->dev, lchip);
lchip->phys = mem->start;
lchip->irq = irq;
/*
* Map the whole region. This also maps the
* registers for our children.
*/
lchip->base = ioremap(mem->start, PAGE_SIZE);
if (!lchip->base) {
ret = -ENOMEM;
goto out;
}
/* locomo initialize */
locomo_writel(0, lchip->base + LOCOMO_ICR);
/* KEYBOARD */
locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC);
/* GPIO */
locomo_writel(0, lchip->base + LOCOMO_GPO);
locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
, lchip->base + LOCOMO_GPE);
locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14))
, lchip->base + LOCOMO_GPD);
locomo_writel(0, lchip->base + LOCOMO_GIE);
/* Frontlight */
locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
/* Longtime timer */
locomo_writel(0, lchip->base + LOCOMO_LTINT);
/* SPI */
locomo_writel(0, lchip->base + LOCOMO_SPIIE);
locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD);
r = locomo_readl(lchip->base + LOCOMO_ASD);
r |= 0x8000;
locomo_writel(r, lchip->base + LOCOMO_ASD);
locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD);
r = locomo_readl(lchip->base + LOCOMO_HSD);
r |= 0x8000;
locomo_writel(r, lchip->base + LOCOMO_HSD);
locomo_writel(128 / 8, lchip->base + LOCOMO_HSC);
/* XON */
locomo_writel(0x80, lchip->base + LOCOMO_TADC);
udelay(1000);
/* CLK9MEN */
r = locomo_readl(lchip->base + LOCOMO_TADC);
r |= 0x10;
locomo_writel(r, lchip->base + LOCOMO_TADC);
udelay(100);
/* init DAC */
r = locomo_readl(lchip->base + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
locomo_writel(r, lchip->base + LOCOMO_DAC);
r = locomo_readl(lchip->base + LOCOMO_VER);
printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff));
/*
* The interrupt controller must be initialised before any
* other device to ensure that the interrupts are available.
*/
if (lchip->irq != NO_IRQ)
locomo_setup_irq(lchip);
for (i = 0; i < ARRAY_SIZE(locomo_devices); i++)
locomo_init_one_child(lchip, &locomo_devices[i]);
return 0;
out:
kfree(lchip);
return ret;
}
static int locomo_remove_child(struct device *dev, void *data)
{
device_unregister(dev);
return 0;
}
static void __locomo_remove(struct locomo *lchip)
{
device_for_each_child(lchip->dev, NULL, locomo_remove_child);
if (lchip->irq != NO_IRQ) {
set_irq_chained_handler(lchip->irq, NULL);
set_irq_data(lchip->irq, NULL);
}
iounmap(lchip->base);
kfree(lchip);
}
static int locomo_probe(struct platform_device *dev)
{
struct resource *mem;
int irq;
mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!mem)
return -EINVAL;
irq = platform_get_irq(dev, 0);
if (irq < 0)
return -ENXIO;
return __locomo_probe(&dev->dev, mem, irq);
}
static int locomo_remove(struct platform_device *dev)
{
struct locomo *lchip = platform_get_drvdata(dev);
if (lchip) {
__locomo_remove(lchip);
platform_set_drvdata(dev, NULL);
}
return 0;
}
/*
* Not sure if this should be on the system bus or not yet.
* We really want some way to register a system device at
* the per-machine level, and then have this driver pick
* up the registered devices.
*/
static struct platform_driver locomo_device_driver = {
.probe = locomo_probe,
.remove = locomo_remove,
#ifdef CONFIG_PM
.suspend = locomo_suspend,
.resume = locomo_resume,
#endif
.driver = {
.name = "locomo",
},
};
/*
* Get the parent device driver (us) structure
* from a child function device
*/
static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev)
{
return (struct locomo *)dev_get_drvdata(ldev->dev.parent);
}
void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir)
{
struct locomo *lchip = locomo_chip_driver(ldev);
unsigned long flags;
unsigned int r;
spin_lock_irqsave(&lchip->lock, flags);
r = locomo_readl(lchip->base + LOCOMO_GPD);
r &= ~bits;
locomo_writel(r, lchip->base + LOCOMO_GPD);
r = locomo_readl(lchip->base + LOCOMO_GPE);
if (dir)
r |= bits;
else
r &= ~bits;
locomo_writel(r, lchip->base + LOCOMO_GPE);
spin_unlock_irqrestore(&lchip->lock, flags);
}
unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits)
{
struct locomo *lchip = locomo_chip_driver(ldev);
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(&lchip->lock, flags);
ret = locomo_readl(lchip->base + LOCOMO_GPL);
spin_unlock_irqrestore(&lchip->lock, flags);
ret &= bits;
return ret;
}
unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits)
{
struct locomo *lchip = locomo_chip_driver(ldev);
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(&lchip->lock, flags);
ret = locomo_readl(lchip->base + LOCOMO_GPO);
spin_unlock_irqrestore(&lchip->lock, flags);
ret &= bits;
return ret;
}
void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set)
{
struct locomo *lchip = locomo_chip_driver(ldev);
unsigned long flags;
unsigned int r;
spin_lock_irqsave(&lchip->lock, flags);
r = locomo_readl(lchip->base + LOCOMO_GPO);
if (set)
r |= bits;
else
r &= ~bits;
locomo_writel(r, lchip->base + LOCOMO_GPO);
spin_unlock_irqrestore(&lchip->lock, flags);
}
static void locomo_m62332_sendbit(void *mapbase, int bit)
{
unsigned int r;
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SCLOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SCLOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
if (bit & 1) {
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SDAOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
} else {
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SDAOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
}
udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
}
void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel)
{
struct locomo *lchip = locomo_chip_driver(ldev);
int i;
unsigned char data;
unsigned int r;
void *mapbase = lchip->base;
unsigned long flags;
spin_lock_irqsave(&lchip->lock, flags);
/* Start */
udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SDAOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_START_HOLD_TIME); /* 5.0 usec */
udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */
/* Send slave address and W bit (LSB is W bit) */
data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT;
for (i = 1; i <= 8; i++) {
locomo_m62332_sendbit(mapbase, data >> (8 - i));
}
/* Check A bit */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SCLOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SDAOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
printk(KERN_WARNING "locomo: m62332_senddata Error 1\n");
return;
}
/* Send Sub address (LSB is channel select) */
/* channel = 0 : ch1 select */
/* = 1 : ch2 select */
data = M62332_SUB_ADDR + channel;
for (i = 1; i <= 8; i++) {
locomo_m62332_sendbit(mapbase, data >> (8 - i));
}
/* Check A bit */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SCLOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SDAOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
printk(KERN_WARNING "locomo: m62332_senddata Error 2\n");
return;
}
/* Send DAC data */
for (i = 1; i <= 8; i++) {
locomo_m62332_sendbit(mapbase, dac_data >> (8 - i));
}
/* Check A bit */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SCLOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SDAOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */
if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */
printk(KERN_WARNING "locomo: m62332_senddata Error 3\n");
return;
}
/* stop */
r = locomo_readl(mapbase + LOCOMO_DAC);
r &= ~(LOCOMO_DAC_SCLOEB);
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SDAOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */
r = locomo_readl(mapbase + LOCOMO_DAC);
r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB;
locomo_writel(r, mapbase + LOCOMO_DAC);
udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */
udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */
spin_unlock_irqrestore(&lchip->lock, flags);
}
/*
* Frontlight control
*/
static struct locomo *locomo_chip_driver(struct locomo_dev *ldev);
void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf)
{
unsigned long flags;
struct locomo *lchip = locomo_chip_driver(dev);
if (vr)
locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 1);
else
locomo_gpio_write(dev, LOCOMO_GPIO_FL_VR, 0);
spin_lock_irqsave(&lchip->lock, flags);
locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
udelay(100);
locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD);
locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS);
spin_unlock_irqrestore(&lchip->lock, flags);
}
/*
* LoCoMo "Register Access Bus."
*
* We model this as a regular bus type, and hang devices directly
* off this.
*/
static int locomo_match(struct device *_dev, struct device_driver *_drv)
{
struct locomo_dev *dev = LOCOMO_DEV(_dev);
struct locomo_driver *drv = LOCOMO_DRV(_drv);
return dev->devid == drv->devid;
}
static int locomo_bus_suspend(struct device *dev, pm_message_t state)
{
struct locomo_dev *ldev = LOCOMO_DEV(dev);
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
int ret = 0;
if (drv && drv->suspend)
ret = drv->suspend(ldev, state);
return ret;
}
static int locomo_bus_resume(struct device *dev)
{
struct locomo_dev *ldev = LOCOMO_DEV(dev);
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
int ret = 0;
if (drv && drv->resume)
ret = drv->resume(ldev);
return ret;
}
static int locomo_bus_probe(struct device *dev)
{
struct locomo_dev *ldev = LOCOMO_DEV(dev);
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
int ret = -ENODEV;
if (drv->probe)
ret = drv->probe(ldev);
return ret;
}
static int locomo_bus_remove(struct device *dev)
{
struct locomo_dev *ldev = LOCOMO_DEV(dev);
struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
int ret = 0;
if (drv->remove)
ret = drv->remove(ldev);
return ret;
}
struct bus_type locomo_bus_type = {
.name = "locomo-bus",
.match = locomo_match,
.probe = locomo_bus_probe,
.remove = locomo_bus_remove,
.suspend = locomo_bus_suspend,
.resume = locomo_bus_resume,
};
int locomo_driver_register(struct locomo_driver *driver)
{
driver->drv.bus = &locomo_bus_type;
return driver_register(&driver->drv);
}
void locomo_driver_unregister(struct locomo_driver *driver)
{
driver_unregister(&driver->drv);
}
static int __init locomo_init(void)
{
int ret = bus_register(&locomo_bus_type);
if (ret == 0)
platform_driver_register(&locomo_device_driver);
return ret;
}
static void __exit locomo_exit(void)
{
platform_driver_unregister(&locomo_device_driver);
bus_unregister(&locomo_bus_type);
}
module_init(locomo_init);
module_exit(locomo_exit);
MODULE_DESCRIPTION("Sharp LoCoMo core driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
EXPORT_SYMBOL(locomo_driver_register);
EXPORT_SYMBOL(locomo_driver_unregister);
EXPORT_SYMBOL(locomo_gpio_set_dir);
EXPORT_SYMBOL(locomo_gpio_read_level);
EXPORT_SYMBOL(locomo_gpio_read_output);
EXPORT_SYMBOL(locomo_gpio_write);
EXPORT_SYMBOL(locomo_m62332_senddata);
