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mfd: support tmiofb cell on tc6393xb
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Add support for tmiofb cell found in tc6393xb chip.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Cc: Ian Molton <spyro@f2s.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
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Dmitry Baryshkov authored and Samuel Ortiz committed Oct 19, 2008
1 parent 51a5562 commit 9e78cfe
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Showing 2 changed files with 122 additions and 0 deletions.
114 changes: 114 additions & 0 deletions drivers/mfd/tc6393xb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,7 @@ enum {
TC6393XB_CELL_NAND,
TC6393XB_CELL_MMC,
TC6393XB_CELL_OHCI,
TC6393XB_CELL_FB,
};

/*--------------------------------------------------------------------------*/
Expand Down Expand Up @@ -199,6 +200,29 @@ const static struct resource tc6393xb_ohci_resources[] = {
},
};

static struct resource __devinitdata 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);
Expand Down Expand Up @@ -243,6 +267,81 @@ static int tc6393xb_ohci_disable(struct platform_device *dev)
return 0;
}

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 struct mfd_cell __devinitdata tc6393xb_cells[] = {
[TC6393XB_CELL_NAND] = {
.name = "tmio-nand",
Expand All @@ -264,6 +363,15 @@ static struct mfd_cell __devinitdata tc6393xb_cells[] = {
.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,
},
};

/*--------------------------------------------------------------------------*/
Expand Down Expand Up @@ -547,6 +655,7 @@ static int __devinit tc6393xb_probe(struct platform_device *dev)
&tc6393xb_cells[TC6393XB_CELL_NAND];
tc6393xb_cells[TC6393XB_CELL_NAND].data_size =
sizeof(tc6393xb_cells[TC6393XB_CELL_NAND]);

tc6393xb_cells[TC6393XB_CELL_MMC].platform_data =
&tc6393xb_cells[TC6393XB_CELL_MMC];
tc6393xb_cells[TC6393XB_CELL_MMC].data_size =
Expand All @@ -557,6 +666,11 @@ static int __devinit tc6393xb_probe(struct platform_device *dev)
tc6393xb_cells[TC6393XB_CELL_OHCI].data_size =
sizeof(tc6393xb_cells[TC6393XB_CELL_OHCI]);

tc6393xb_cells[TC6393XB_CELL_FB].driver_data = tcpd->fb_data;
tc6393xb_cells[TC6393XB_CELL_FB].platform_data =
&tc6393xb_cells[TC6393XB_CELL_FB];
tc6393xb_cells[TC6393XB_CELL_FB].data_size =
sizeof(tc6393xb_cells[TC6393XB_CELL_FB]);

ret = mfd_add_devices(&dev->dev, dev->id,
tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
Expand Down
8 changes: 8 additions & 0 deletions include/linux/mfd/tc6393xb.h
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
#ifndef MFD_TC6393XB_H
#define MFD_TC6393XB_H

#include <linux/fb.h>

/* Also one should provide the CK3P6MI clock */
struct tc6393xb_platform_data {
u16 scr_pll2cr; /* PLL2 Control */
Expand All @@ -33,18 +35,24 @@ struct tc6393xb_platform_data {
void (*teardown)(struct platform_device *dev);

struct tmio_nand_data *nand_data;
struct tmio_fb_data *fb_data;

unsigned resume_restore : 1; /* make special actions
to preserve the state
on suspend/resume */
};

extern int tc6393xb_lcd_mode(struct platform_device *fb,
const struct fb_videomode *mode);
extern int tc6393xb_lcd_set_power(struct platform_device *fb, bool on);

/*
* Relative to irq_base
*/
#define IRQ_TC6393_NAND 0
#define IRQ_TC6393_MMC 1
#define IRQ_TC6393_OHCI 2
#define IRQ_TC6393_FB 4

#define TC6393XB_NR_IRQS 8

Expand Down

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