/*
* lpc_sch.c - LPC interface for Intel Poulsbo SCH
*
* LPC bridge function of the Intel SCH contains many other
* functional units, such as Interrupt controllers, Timers,
* Power Management, System Management, GPIO, RTC, and LPC
* Configuration Registers.
*
* Copyright (c) 2010 CompuLab Ltd
* Copyright (c) 2014 Intel Corp.
* Author: Denis Turischev <denis@compulab.co.il>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License 2 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/mfd/core.h>
#define SMBASE 0x40
#define SMBUS_IO_SIZE 64
#define GPIOBASE 0x44
#define GPIO_IO_SIZE 64
#define GPIO_IO_SIZE_CENTERTON 128
/* Intel Quark X1000 GPIO IRQ Number */
#define GPIO_IRQ_QUARK_X1000 9
#define WDTBASE 0x84
#define WDT_IO_SIZE 64
enum sch_chipsets {
LPC_SCH = 0, /* Intel Poulsbo SCH */
LPC_ITC, /* Intel Tunnel Creek */
LPC_CENTERTON, /* Intel Centerton */
LPC_QUARK_X1000, /* Intel Quark X1000 */
};
struct lpc_sch_info {
unsigned int io_size_smbus;
unsigned int io_size_gpio;
unsigned int io_size_wdt;
int irq_gpio;
};
static struct lpc_sch_info sch_chipset_info[] = {
[LPC_SCH] = {
.io_size_smbus = SMBUS_IO_SIZE,
.io_size_gpio = GPIO_IO_SIZE,
.irq_gpio = -1,
},
[LPC_ITC] = {
.io_size_smbus = SMBUS_IO_SIZE,
.io_size_gpio = GPIO_IO_SIZE,
.io_size_wdt = WDT_IO_SIZE,
.irq_gpio = -1,
},
[LPC_CENTERTON] = {
.io_size_smbus = SMBUS_IO_SIZE,
.io_size_gpio = GPIO_IO_SIZE_CENTERTON,
.io_size_wdt = WDT_IO_SIZE,
.irq_gpio = -1,
},
[LPC_QUARK_X1000] = {
.io_size_gpio = GPIO_IO_SIZE,
.irq_gpio = GPIO_IRQ_QUARK_X1000,
.io_size_wdt = WDT_IO_SIZE,
},
};
static const struct pci_device_id lpc_sch_ids[] = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC), LPC_SCH },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC), LPC_ITC },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CENTERTON_ILB), LPC_CENTERTON },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QUARK_X1000_ILB), LPC_QUARK_X1000 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, lpc_sch_ids);
#define LPC_NO_RESOURCE 1
#define LPC_SKIP_RESOURCE 2
static int lpc_sch_get_io(struct pci_dev *pdev, int where, const char *name,
struct resource *res, int size)
{
unsigned int base_addr_cfg;
unsigned short base_addr;
if (size == 0)
return LPC_NO_RESOURCE;
pci_read_config_dword(pdev, where, &base_addr_cfg);
base_addr = 0;
if (!(base_addr_cfg & (1 << 31)))
dev_warn(&pdev->dev, "Decode of the %s I/O range disabled\n",
name);
else
base_addr = (unsigned short)base_addr_cfg;
if (base_addr == 0) {
dev_warn(&pdev->dev, "I/O space for %s uninitialized\n", name);
return LPC_SKIP_RESOURCE;
}
res->start = base_addr;
res->end = base_addr + size - 1;
res->flags = IORESOURCE_IO;
return 0;
}
static int lpc_sch_populate_cell(struct pci_dev *pdev, int where,
const char *name, int size, int irq,
int id, struct mfd_cell *cell)
{
struct resource *res;
int ret;
res = devm_kcalloc(&pdev->dev, 2, sizeof(*res), GFP_KERNEL);
if (!res)
return -ENOMEM;
ret = lpc_sch_get_io(pdev, where, name, res, size);
if (ret)
return ret;
memset(cell, 0, sizeof(*cell));
cell->name = name;
cell->resources = res;
cell->num_resources = 1;
cell->ignore_resource_conflicts = true;
cell->id = id;
/* Check if we need to add an IRQ resource */
if (irq < 0)
return 0;
res++;
res->start = irq;
res->end = irq;
res->flags = IORESOURCE_IRQ;
cell->num_resources++;
return 0;
}
static int lpc_sch_probe(struct pci_dev *dev, /*
* Toshiba TC6393XB SoC support
*
* Copyright(c) 2005-2006 Chris Humbert
* Copyright(c) 2005 Dirk Opfer
* Copyright(c) 2005 Ian Molton <spyro@f2s.com>
* Copyright(c) 2007 Dmitry Baryshkov
*
* Based on code written by Sharp/Lineo for 2.4 kernels
* Based on locomo.c
*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
#include <linux/mfd/tc6393xb.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#define SCR_REVID 0x08 /* b Revision ID */
#define SCR_ISR 0x50 /* b Interrupt Status */
#define SCR_IMR 0x52 /* b Interrupt Mask */
#define SCR_IRR 0x54 /* b Interrupt Routing */
#define SCR_GPER 0x60 /* w GP Enable */
#define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */
#define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */
#define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */
#define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */
#define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */
#define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */
#define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */
#define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */
#define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */
#define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */
#define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */
#define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */
#define SCR_CCR 0x98 /* w Clock Control */
#define SCR_PLL2CR 0x9a /* w PLL2 Control */
#define SCR_PLL1CR 0x9c /* l PLL1 Control */
#define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */
#define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */
#define SCR_FER 0xe0 /* b Function Enable */
#define SCR_MCR 0xe4 /* w Mode Control */
#define SCR_CONFIG 0xfc /* b Configuration Control */
#define SCR_DEBUG 0xff /* b Debug */
#define SCR_CCR_CK32K BIT(0)
#define SCR_CCR_USBCK BIT(1)
#define SCR_CCR_UNK1 BIT(4)
#define SCR_CCR_MCLK_MASK (7 << 8)
#define SCR_CCR_MCLK_OFF (0 << 8)
#define SCR_CCR_MCLK_12 (1 << 8)
#define SCR_CCR_MCLK_24 (2 << 8)
#define SCR_CCR_MCLK_48 (3 << 8)
#define SCR_CCR_HCLK_MASK (3 << 12)
#define SCR_CCR_HCLK_24 (0 << 12)
#define SCR_CCR_HCLK_48 (1 << 12)
#define SCR_FER_USBEN BIT(0) /* USB host enable */
#define SCR_FER_LCDCVEN BIT(1) /* polysilicon TFT enable */
#define SCR_FER_SLCDEN BIT(2) /* SLCD enable */
#define SCR_MCR_RDY_MASK (3 << 0)
#define SCR_MCR_RDY_OPENDRAIN (0 << 0)
#define SCR_MCR_RDY_TRISTATE (1 << 0)
#define SCR_MCR_RDY_PUSHPULL (2 << 0)
#define SCR_MCR_RDY_UNK BIT(2)
#define SCR_MCR_RDY_EN BIT(3)
#define SCR_MCR_INT_MASK (3 << 4)
#define SCR_MCR_INT_OPENDRAIN (0 << 4)
#define SCR_MCR_INT_TRISTATE (1 << 4)
#define SCR_MCR_INT_PUSHPULL (2 << 4)
#define SCR_MCR_INT_UNK BIT(6)
#define SCR_MCR_INT_EN BIT(7)
/* bits 8 - 16 are unknown */
#define TC_GPIO_BIT(i) (1 << (i & 0x7))
/*--------------------------------------------------------------------------*/
struct tc6393xb {
void __iomem *scr;
struct gpio_chip gpio;
struct clk *clk; /* 3,6 Mhz */
spinlock_t lock; /* protects RMW cycles */
struct {
u8 fer;
u16 ccr;
u8 gpi_bcr[3];
u8 gpo_dsr[3];
u8 gpo_doecr[3];
} suspend_state;
struct resource rscr;
struct resource *iomem;
int irq;
int irq_base;
};
enum {
TC6393XB_CELL_NAND,
TC6393XB_CELL_MMC,
TC6393XB_CELL_OHCI,
TC6393XB_CELL_FB,
};
/*--------------------------------------------------------------------------*/
static int tc6393xb_nand_enable(struct platform_device *nand)
{
struct platform_device *dev = to_platform_device(nand->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&tc6393xb->lock, flags);
/* SMD buffer on */
dev_dbg(&dev->dev, "SMD buffer on\n");
tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
static struct resource tc6393xb_nand_resources[] = {
{
.start = 0x1000,
.end = 0x1007,
.flags = IORESOURCE_MEM,
},
{
.start = 0x0100,
.end = 0x01ff,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_TC6393_NAND,
.end = IRQ_TC6393_NAND,
.flags = IORESOURCE_IRQ,
},
};
static struct resource tc6393xb_mmc_resources[] = {
{
.start = 0x800,
.end = 0x9ff,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_TC6393_MMC,
.end = IRQ_TC6393_MMC,
.flags = IORESOURCE_IRQ,
},
};
static const struct resource tc6393xb_ohci_resources[] = {
{
.start = 0x3000,
.end = 0x31ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0x0300,
.end = 0x03ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0x010000,
.end = 0x017fff,
.flags = IORESOURCE_MEM,
},
{
.start = 0x018000,
.end = 0x01ffff,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_TC6393_OHCI,
.end = IRQ_TC6393_OHCI,
.flags = IORESOURCE_IRQ,
},
};
static struct resource tc6393xb_fb_resources[] = {
{
.start = 0x5000,
.end = 0x51ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0x0500,
.end = 0x05ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0x100000,
.end = 0x1fffff,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_TC6393_FB,
.end = IRQ_TC6393_FB,
.flags = IORESOURCE_IRQ,
},
};
static int tc6393xb_ohci_enable(struct platform_device *dev)
{
struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
unsigned long flags;
u16 ccr;
u8 fer;
spin_lock_irqsave(&tc6393xb->lock, flags);
ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
ccr |= SCR_CCR_USBCK;
tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
fer |= SCR_FER_USBEN;
tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
static int tc6393xb_ohci_disable(struct platform_device *dev)
{
struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
unsigned long flags;
u16 ccr;
u8 fer;
spin_lock_irqsave(&tc6393xb->lock, flags);
fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
fer &= ~SCR_FER_USBEN;
tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
ccr &= ~SCR_CCR_USBCK;
tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
static int tc6393xb_ohci_suspend(struct platform_device *dev)
{
struct tc6393xb_platform_data *tcpd = dev_get_platdata(dev->dev.parent);
/* We can't properly store/restore OHCI state, so fail here */
if (tcpd->resume_restore)
return -EBUSY;
return tc6393xb_ohci_disable(dev);
}
static int tc6393xb_fb_enable(struct platform_device *dev)
{
struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
unsigned long flags;
u16 ccr;
spin_lock_irqsave(&tc6393xb->lock, flags);
ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
ccr &= ~SCR_CCR_MCLK_MASK;
ccr |= SCR_CCR_MCLK_48;
tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
static int tc6393xb_fb_disable(struct platform_device *dev)
{
struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
unsigned long flags;
u16 ccr;
spin_lock_irqsave(&tc6393xb->lock, flags);
ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
ccr &= ~SCR_CCR_MCLK_MASK;
ccr |= SCR_CCR_MCLK_OFF;
tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
{
struct platform_device *dev = to_platform_device(fb->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
u8 fer;
unsigned long flags;
spin_lock_irqsave(&tc6393xb->lock, flags);
fer = ioread8(tc6393xb->scr + SCR_FER);
if (on)
fer |= SCR_FER_SLCDEN;
else
fer &= ~SCR_FER_SLCDEN;
iowrite8(fer, tc6393xb->scr + SCR_FER);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
EXPORT_SYMBOL(tc6393xb_lcd_set_power);
int tc6393xb_lcd_mode(struct platform_device *fb,
const struct fb_videomode *mode) {
struct platform_device *dev = to_platform_device(fb->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&tc6393xb->lock, flags);
iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
EXPORT_SYMBOL(tc6393xb_lcd_mode);
static int tc6393xb_mmc_enable(struct platform_device *mmc)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
tmio_core_mmc_enable(tc6393xb->scr + 0x200, 0,
tc6393xb_mmc_resources[0].start & 0xfffe);
return 0;
}
static int tc6393xb_mmc_resume(struct platform_device *mmc)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
tmio_core_mmc_resume(tc6393xb->scr + 0x200, 0,
tc6393xb_mmc_resources[0].start & 0xfffe);
return 0;
}
static void tc6393xb_mmc_pwr(struct platform_device *mmc, int state)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
tmio_core_mmc_pwr(tc6393xb->scr + 0x200, 0, state);
}
static void tc6393xb_mmc_clk_div(struct platform_device *mmc, int state)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
tmio_core_mmc_clk_div(tc6393xb->scr + 0x200, 0, state);
}
static struct tmio_mmc_data tc6393xb_mmc_data = {
.hclk = 24000000,
.set_pwr = tc6393xb_mmc_pwr,
.set_clk_div = tc6393xb_mmc_clk_div,
};
static struct mfd_cell tc6393xb_cells[] = {
[TC6393XB_CELL_NAND] = {
.name = "tmio-nand",
.enable = tc6393xb_nand_enable,
.num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
.resources = tc6393xb_nand_resources,
},
[TC6393XB_CELL_MMC] = {
.name = "tmio-mmc",
.enable = tc6393xb_mmc_enable,
.resume = tc6393xb_mmc_resume,
.platform_data = &tc6393xb_mmc_data,
.pdata_size = sizeof(tc6393xb_mmc_data),
.num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
.resources = tc6393xb_mmc_resources,
},
[TC6393XB_CELL_OHCI] = {
.name = "tmio-ohci",
.num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
.resources = tc6393xb_ohci_resources,
.enable = tc6393xb_ohci_enable,
.suspend = tc6393xb_ohci_suspend,
.resume = tc6393xb_ohci_enable,
.disable = tc6393xb_ohci_disable,
},
[TC6393XB_CELL_FB] = {
.name = "tmio-fb",
.num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
.resources = tc6393xb_fb_resources,
.enable = tc6393xb_fb_enable,
.suspend = tc6393xb_fb_disable,
.resume = tc6393xb_fb_enable,
.disable = tc6393xb_fb_disable,
},
};
/*--------------------------------------------------------------------------*/
static int tc6393xb_gpio_get(struct gpio_chip *chip,
unsigned offset)
{
struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
/* XXX: does dsr also represent inputs? */
return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
& TC_GPIO_BIT(offset);
}
static void __tc6393xb_gpio_set(struct gpio_chip *chip,
unsigned offset, int value)
{
struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
u8 dsr;
dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
if (value)
dsr |= TC_GPIO_BIT(offset);
else
dsr &= ~TC_GPIO_BIT(offset);
tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
}
static void tc6393xb_gpio_set(struct gpio_chip *chip,
unsigned offset, int value)
{
struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
unsigned long flags;
spin_lock_irqsave(&tc6393xb->lock, flags);
__tc6393xb_gpio_set(chip, offset, value);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
}
static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
unsigned offset)
{
struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
unsigned long flags;
u8 doecr;
spin_lock_irqsave(&tc6393xb->lock, flags);
doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
doecr &= ~TC_GPIO_BIT(offset);
tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
unsigned long flags;
u8 doecr;
spin_lock_irqsave(&tc6393xb->lock, flags);
__tc6393xb_gpio_set(chip, offset, value);
doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
doecr |= TC_GPIO_BIT(offset);
tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
spin_unlock_irqrestore(&tc6393xb->lock, flags);
return 0;
}
static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
{
tc6393xb->gpio.label = "tc6393xb";
tc6393xb->gpio.base = gpio_base;
tc6393xb->gpio.ngpio = 16;
tc6393xb->gpio.set = tc6393xb_gpio_set;
tc6393xb->gpio.get = tc6393xb_gpio_get;
tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
return gpiochip_add(&tc6393xb->gpio);
}
/*--------------------------------------------------------------------------*/
static void tc6393xb_irq(struct irq_desc *desc)
{
struct tc6393xb *tc6393xb = irq_desc_get_handler_data(desc);
unsigned int isr;
unsigned int i, irq_base;
irq_base = tc6393xb->irq_base;
while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
for (i = 0; i < TC6393XB_NR_IRQS; i++) {
if (isr & (1 << i))
generic_handle_irq(irq_base + i);
}
}
static void tc6393xb_irq_ack(struct irq_data *data)
{
}
static void tc6393xb_irq_mask(struct irq_data *data)
{
struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
unsigned long flags;
u8 imr;
spin_lock_irqsave(&tc6393xb->lock, flags);
imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
imr |= 1 << (data->irq - tc6393xb->irq_base);
tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
}
static void tc6393xb_irq_unmask(struct irq_data *data)
{
struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
unsigned long flags;
u8 imr;
spin_lock_irqsave(&tc6393xb->lock, flags);
imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
imr &= ~(1 << (data->irq - tc6393xb->irq_base));
tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
spin_unlock_irqrestore(&tc6393xb->lock, flags);
}
static struct irq_chip tc6393xb_chip = {
.name = "tc6393xb",
.irq_ack = tc6393xb_irq_ack,
.irq_mask = tc6393xb_irq_mask,
.irq_unmask = tc6393xb_irq_unmask,
};
static void tc6393xb_attach_irq(struct platform_device *dev)
{
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
unsigned int irq, irq_base;
irq_base = tc6393xb->irq_base;
for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
irq_set_chip_and_handler(irq, &tc6393xb_chip, handle_edge_irq);
irq_set_chip_data(irq, tc6393xb);
irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
}
irq_set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
irq_set_chained_handler_and_data(tc6393xb->irq, tc6393xb_irq,
tc6393xb);
}
static void tc6393xb_detach_irq(struct platform_device *dev)
{
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
unsigned int irq, irq_base;
irq_set_chained_handler_and_data(tc6393xb->irq, NULL, NULL);
irq_base = tc6393xb->irq_base;
for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
irq_set_chip(irq, NULL);
irq_set_chip_data(irq, NULL);
}
}
/*--------------------------------------------------------------------------*/
static int tc6393xb_probe(struct platform_device *dev)
{
struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
struct tc6393xb *tc6393xb;
struct resource *iomem, *rscr;
int ret;
iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!iomem)
return -EINVAL;
tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
if (!tc6393xb) {
ret = -ENOMEM;
goto err_kzalloc;
}
spin_lock_init(&tc6393xb->lock);
platform_set_drvdata(dev, tc6393xb);
ret = platform_get_irq(dev, 0);
if (ret >= 0)
tc6393xb->irq = ret;
else
goto err_noirq;
tc6393xb->iomem = iomem;
tc6393xb->irq_base = tcpd->irq_base;
tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
if (IS_ERR(tc6393xb->clk)) {
ret = PTR_ERR(tc6393xb->clk);
goto err_clk_get;
}
rscr = &tc6393xb->rscr;
rscr->name = "tc6393xb-core";
rscr->start = iomem->start;
rscr->end = iomem->start + 0xff;
rscr->flags = IORESOURCE_MEM;
ret = request_resource(iomem, rscr);
if (ret)
goto err_request_scr;
tc6393xb->scr = ioremap(rscr->start, resource_size(rscr));
if (!tc6393xb->scr) {
ret = -ENOMEM;
goto err_ioremap;
}
ret = clk_prepare_enable(tc6393xb->clk);
if (ret)
goto err_clk_enable;
ret = tcpd->enable(dev);
if (ret)
goto err_enable;
iowrite8(0, tc6393xb->scr + SCR_FER);
iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
tc6393xb->scr + SCR_CCR);
iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
BIT(15), tc6393xb->scr + SCR_MCR);
iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
iowrite8(0, tc6393xb->scr + SCR_IRR);
iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
tmio_ioread8(tc6393xb->scr + SCR_REVID),
(unsigned long) iomem->start, tc6393xb->irq);
tc6393xb->gpio.base = -1;
if (tcpd->gpio_base >= 0) {
ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
if (ret)
goto err_gpio_add;
}
tc6393xb_attach_irq(dev);
if (tcpd->setup) {
ret = tcpd->setup(dev);
if (ret)
goto err_setup;
}
tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = tcpd->nand_data;
tc6393xb_cells[TC6393XB_CELL_NAND].pdata_size =
sizeof(*tcpd->nand_data);
tc6393xb_cells[TC6393XB_CELL_FB].platform_data = tcpd->fb_data;
tc6393xb_cells[TC6393XB_CELL_FB].pdata_size = sizeof(*tcpd->fb_data);
ret = mfd_add_devices(&dev->dev, dev->id,
tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
iomem, tcpd->irq_base, NULL);
if (!ret)
return 0;
if (tcpd->teardown)
tcpd->teardown(dev);
err_setup:
tc6393xb_detach_irq(dev);
err_gpio_add:
if (tc6393xb->gpio.base != -1)
gpiochip_remove(&tc6393xb->gpio);
tcpd->disable(dev);
err_enable:
clk_disable_unprepare(tc6393xb->clk);
err_clk_enable:
iounmap(tc6393xb->scr);
err_ioremap:
release_resource(&tc6393xb->rscr);
err_request_scr:
clk_put(tc6393xb->clk);
err_noirq:
err_clk_get:
kfree(tc6393xb);
err_kzalloc:
return ret;
}
static int tc6393xb_remove(struct platform_device *dev)
{
struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
int ret;
mfd_remove_devices(&dev->dev);
if (tcpd->teardown)
tcpd->teardown(dev);
tc6393xb_detach_irq(dev);
if (tc6393xb->gpio.base != -1)
gpiochip_remove(&tc6393xb->gpio);
ret = tcpd->disable(dev);
clk_disable_unprepare(tc6393xb->clk);
iounmap(tc6393xb->scr);
release_resource(&tc6393xb->rscr);
clk_put(tc6393xb->clk);
kfree(tc6393xb);
return ret;
}
#ifdef CONFIG_PM
static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
{
struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
int i, ret;
tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
for (i = 0; i < 3; i++) {
tc6393xb->suspend_state.gpo_dsr[i] =
ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
tc6393xb->suspend_state.gpo_doecr[i] =
ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
tc6393xb->suspend_state.gpi_bcr[i] =
ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
}
ret = tcpd->suspend(dev);
clk_disable_unprepare(tc6393xb->clk);
return ret;
}
static int tc6393xb_resume(struct platform_device *dev)
{
struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
int ret;
int i;
clk_prepare_enable(tc6393xb->clk);
ret = tcpd->resume(dev);
if (ret)
return ret;
if (!tcpd->resume_restore)
return 0;
iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER);
iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR);
iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
BIT(15), tc6393xb->scr + SCR_MCR);
iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
iowrite8(0, tc6393xb->scr + SCR_IRR);
iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
for (i = 0; i < 3; i++) {
iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
tc6393xb->scr + SCR_GPO_DSR(i));
iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
tc6393xb->scr + SCR_GPO_DOECR(i));
iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
tc6393xb->scr + SCR_GPI_BCR(i));
}
return 0;
}
#else
#define tc6393xb_suspend NULL
#define tc6393xb_resume NULL
#endif
static struct platform_driver tc6393xb_driver = {
.probe = tc6393xb_probe,
.remove = tc6393xb_remove,
.suspend = tc6393xb_suspend,
.resume = tc6393xb_resume,
.driver = {
.name = "tc6393xb",
},
};
static int __init tc6393xb_init(void)
{
return platform_driver_register(&tc6393xb_driver);
}
static void __exit tc6393xb_exit(void)
{
platform_driver_unregister(&tc6393xb_driver);
}
subsys_initcall(tc6393xb_init);
module_exit(tc6393xb_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
MODULE_ALIAS("platform:tc6393xb");
