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linux-sg2042/drivers/video/pnx4008/sdum.c

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/*
* drivers/video/pnx4008/sdum.c
*
* Display Update Master support
*
* Authors: Grigory Tolstolytkin <gtolstolytkin@ru.mvista.com>
* Vitaly Wool <vitalywool@gmail.com>
* Based on Philips Semiconductors's code
*
* Copyrght (c) 2005-2006 MontaVista Software, Inc.
* Copyright (c) 2005 Philips Semiconductors
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <asm/uaccess.h>
#include <mach/gpio.h>
#include "sdum.h"
#include "fbcommon.h"
#include "dum.h"
/* Framebuffers we have */
static struct pnx4008_fb_addr {
int fb_type;
long addr_offset;
long fb_length;
} fb_addr[] = {
[0] = {
FB_TYPE_YUV, 0, 0xB0000
},
[1] = {
FB_TYPE_RGB, 0xB0000, 0x50000
},
};
static struct dum_data {
u32 lcd_phys_start;
u32 lcd_virt_start;
u32 slave_phys_base;
u32 *slave_virt_base;
int fb_owning_channel[MAX_DUM_CHANNELS];
struct dumchannel_uf chan_uf_store[MAX_DUM_CHANNELS];
} dum_data;
/* Different local helper functions */
static u32 nof_pixels_dx(struct dum_ch_setup *ch_setup)
{
return (ch_setup->xmax - ch_setup->xmin + 1);
}
static u32 nof_pixels_dy(struct dum_ch_setup *ch_setup)
{
return (ch_setup->ymax - ch_setup->ymin + 1);
}
static u32 nof_pixels_dxy(struct dum_ch_setup *ch_setup)
{
return (nof_pixels_dx(ch_setup) * nof_pixels_dy(ch_setup));
}
static u32 nof_bytes(struct dum_ch_setup *ch_setup)
{
u32 r = nof_pixels_dxy(ch_setup);
switch (ch_setup->format) {
case RGB888:
case RGB666:
r *= 4;
break;
default:
r *= 2;
break;
}
return r;
}
static u32 build_command(int disp_no, u32 reg, u32 val)
{
return ((disp_no << 26) | BIT(25) | (val << 16) | (disp_no << 10) |
(reg << 0));
}
static u32 build_double_index(int disp_no, u32 val)
{
return ((disp_no << 26) | (val << 16) | (disp_no << 10) | (val << 0));
}
static void build_disp_window(struct dum_ch_setup * ch_setup, struct disp_window * dw)
{
dw->ymin = ch_setup->ymin;
dw->ymax = ch_setup->ymax;
dw->xmin_l = ch_setup->xmin & 0xFF;
dw->xmin_h = (ch_setup->xmin & BIT(8)) >> 8;
dw->xmax_l = ch_setup->xmax & 0xFF;
dw->xmax_h = (ch_setup->xmax & BIT(8)) >> 8;
}
static int put_channel(struct dumchannel chan)
{
int i = chan.channelnr;
if (i < 0 || i > MAX_DUM_CHANNELS)
return -EINVAL;
else {
DUM_CH_MIN(i) = chan.dum_ch_min;
DUM_CH_MAX(i) = chan.dum_ch_max;
DUM_CH_CONF(i) = chan.dum_ch_conf;
DUM_CH_CTRL(i) = chan.dum_ch_ctrl;
}
return 0;
}
static void clear_channel(int channr)
{
struct dumchannel chan;
chan.channelnr = channr;
chan.dum_ch_min = 0;
chan.dum_ch_max = 0;
chan.dum_ch_conf = 0;
chan.dum_ch_ctrl = 0;
put_channel(chan);
}
static int put_cmd_string(struct cmdstring cmds)
{
u16 *cmd_str_virtaddr;
u32 *cmd_ptr0_virtaddr;
u32 cmd_str_physaddr;
int i = cmds.channelnr;
if (i < 0 || i > MAX_DUM_CHANNELS)
return -EINVAL;
else if ((cmd_ptr0_virtaddr =
(int *)ioremap_nocache(DUM_COM_BASE,
sizeof(int) * MAX_DUM_CHANNELS)) ==
NULL)
return -EIOREMAPFAILED;
else {
cmd_str_physaddr = ioread32(&cmd_ptr0_virtaddr[cmds.channelnr]);
if ((cmd_str_virtaddr =
(u16 *) ioremap_nocache(cmd_str_physaddr,
sizeof(cmds))) == NULL) {
iounmap(cmd_ptr0_virtaddr);
return -EIOREMAPFAILED;
} else {
int t;
for (t = 0; t < 8; t++)
iowrite16(*((u16 *)&cmds.prestringlen + t),
cmd_str_virtaddr + t);
for (t = 0; t < cmds.prestringlen / 2; t++)
iowrite16(*((u16 *)&cmds.precmd + t),
cmd_str_virtaddr + t + 8);
for (t = 0; t < cmds.poststringlen / 2; t++)
iowrite16(*((u16 *)&cmds.postcmd + t),
cmd_str_virtaddr + t + 8 +
cmds.prestringlen / 2);
iounmap(cmd_ptr0_virtaddr);
iounmap(cmd_str_virtaddr);
}
}
return 0;
}
static u32 dum_ch_setup(int ch_no, struct dum_ch_setup * ch_setup)
{
struct cmdstring cmds_c;
struct cmdstring *cmds = &cmds_c;
struct disp_window dw;
int standard;
u32 orientation = 0;
struct dumchannel chan = { 0 };
int ret;
if ((ch_setup->xmirror) || (ch_setup->ymirror) || (ch_setup->rotate)) {
standard = 0;
orientation = BIT(1); /* always set 9-bit-bus */
if (ch_setup->xmirror)
orientation |= BIT(4);
if (ch_setup->ymirror)
orientation |= BIT(3);
if (ch_setup->rotate)
orientation |= BIT(0);
} else
standard = 1;
cmds->channelnr = ch_no;
/* build command string header */
if (standard) {
cmds->prestringlen = 32;
cmds->poststringlen = 0;
} else {
cmds->prestringlen = 48;
cmds->poststringlen = 16;
}
cmds->format =
(u16) ((ch_setup->disp_no << 4) | (BIT(3)) | (ch_setup->format));
cmds->reserved = 0x0;
cmds->startaddr_low = (ch_setup->minadr & 0xFFFF);
cmds->startaddr_high = (ch_setup->minadr >> 16);
if ((ch_setup->minadr == 0) && (ch_setup->maxadr == 0)
&& (ch_setup->xmin == 0)
&& (ch_setup->ymin == 0) && (ch_setup->xmax == 0)
&& (ch_setup->ymax == 0)) {
cmds->pixdatlen_low = 0;
cmds->pixdatlen_high = 0;
} else {
u32 nbytes = nof_bytes(ch_setup);
cmds->pixdatlen_low = (nbytes & 0xFFFF);
cmds->pixdatlen_high = (nbytes >> 16);
}
if (ch_setup->slave_trans)
cmds->pixdatlen_high |= BIT(15);
/* build pre-string */
build_disp_window(ch_setup, &dw);
if (standard) {
cmds->precmd[0] =
build_command(ch_setup->disp_no, DISP_XMIN_L_REG, 0x99);
cmds->precmd[1] =
build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
dw.xmin_l);
cmds->precmd[2] =
build_command(ch_setup->disp_no, DISP_XMIN_H_REG,
dw.xmin_h);
cmds->precmd[3] =
build_command(ch_setup->disp_no, DISP_YMIN_REG, dw.ymin);
cmds->precmd[4] =
build_command(ch_setup->disp_no, DISP_XMAX_L_REG,
dw.xmax_l);
cmds->precmd[5] =
build_command(ch_setup->disp_no, DISP_XMAX_H_REG,
dw.xmax_h);
cmds->precmd[6] =
build_command(ch_setup->disp_no, DISP_YMAX_REG, dw.ymax);
cmds->precmd[7] =
build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
} else {
if (dw.xmin_l == ch_no)
cmds->precmd[0] =
build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
0x99);
else
cmds->precmd[0] =
build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
ch_no);
cmds->precmd[1] =
build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
dw.xmin_l);
cmds->precmd[2] =
build_command(ch_setup->disp_no, DISP_XMIN_H_REG,
dw.xmin_h);
cmds->precmd[3] =
build_command(ch_setup->disp_no, DISP_YMIN_REG, dw.ymin);
cmds->precmd[4] =
build_command(ch_setup->disp_no, DISP_XMAX_L_REG,
dw.xmax_l);
cmds->precmd[5] =
build_command(ch_setup->disp_no, DISP_XMAX_H_REG,
dw.xmax_h);
cmds->precmd[6] =
build_command(ch_setup->disp_no, DISP_YMAX_REG, dw.ymax);
cmds->precmd[7] =
build_command(ch_setup->disp_no, DISP_1_REG, orientation);
cmds->precmd[8] =
build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
cmds->precmd[9] =
build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
cmds->precmd[0xA] =
build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
cmds->precmd[0xB] =
build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
cmds->postcmd[0] =
build_command(ch_setup->disp_no, DISP_1_REG, BIT(1));
cmds->postcmd[1] =
build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 1);
cmds->postcmd[2] =
build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 2);
cmds->postcmd[3] =
build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 3);
}
if ((ret = put_cmd_string(cmds_c)) != 0) {
return ret;
}
chan.channelnr = cmds->channelnr;
chan.dum_ch_min = ch_setup->dirtybuffer + ch_setup->minadr;
chan.dum_ch_max = ch_setup->dirtybuffer + ch_setup->maxadr;
chan.dum_ch_conf = 0x002;
chan.dum_ch_ctrl = 0x04;
put_channel(chan);
return 0;
}
static u32 display_open(int ch_no, int auto_update, u32 * dirty_buffer,
u32 * frame_buffer, u32 xpos, u32 ypos, u32 w, u32 h)
{
struct dum_ch_setup k;
int ret;
/* keep width & height within display area */
if ((xpos + w) > DISP_MAX_X_SIZE)
w = DISP_MAX_X_SIZE - xpos;
if ((ypos + h) > DISP_MAX_Y_SIZE)
h = DISP_MAX_Y_SIZE - ypos;
/* assume 1 display only */
k.disp_no = 0;
k.xmin = xpos;
k.ymin = ypos;
k.xmax = xpos + (w - 1);
k.ymax = ypos + (h - 1);
/* adjust min and max values if necessary */
if (k.xmin > DISP_MAX_X_SIZE - 1)
k.xmin = DISP_MAX_X_SIZE - 1;
if (k.ymin > DISP_MAX_Y_SIZE - 1)
k.ymin = DISP_MAX_Y_SIZE - 1;
if (k.xmax > DISP_MAX_X_SIZE - 1)
k.xmax = DISP_MAX_X_SIZE - 1;
if (k.ymax > DISP_MAX_Y_SIZE - 1)
k.ymax = DISP_MAX_Y_SIZE - 1;
k.xmirror = 0;
k.ymirror = 0;
k.rotate = 0;
k.minadr = (u32) frame_buffer;
k.maxadr = (u32) frame_buffer + (((w - 1) << 10) | ((h << 2) - 2));
k.pad = PAD_1024;
k.dirtybuffer = (u32) dirty_buffer;
k.format = RGB888;
k.hwdirty = 0;
k.slave_trans = 0;
ret = dum_ch_setup(ch_no, &k);
return ret;
}
static void lcd_reset(void)
{
u32 *dum_pio_base = (u32 *)IO_ADDRESS(PNX4008_PIO_BASE);
udelay(1);
iowrite32(BIT(19), &dum_pio_base[2]);
udelay(1);
iowrite32(BIT(19), &dum_pio_base[1]);
udelay(1);
}
static int dum_init(struct platform_device *pdev)
{
struct clk *clk;
/* enable DUM clock */
clk = clk_get(&pdev->dev, "dum_ck");
if (IS_ERR(clk)) {
printk(KERN_ERR "pnx4008_dum: Unable to access DUM clock\n");
return PTR_ERR(clk);
}
clk_set_rate(clk, 1);
clk_put(clk);
DUM_CTRL = V_DUM_RESET;
/* set priority to "round-robin". All other params to "false" */
DUM_CONF = BIT(9);
/* Display 1 */
DUM_WTCFG1 = PNX4008_DUM_WT_CFG;
DUM_RTCFG1 = PNX4008_DUM_RT_CFG;
DUM_TCFG = PNX4008_DUM_T_CFG;
return 0;
}
static void dum_chan_init(void)
{
int i = 0, ch = 0;
u32 *cmdptrs;
u32 *cmdstrings;
DUM_COM_BASE =
CMDSTRING_BASEADDR + BYTES_PER_CMDSTRING * NR_OF_CMDSTRINGS;
if ((cmdptrs =
(u32 *) ioremap_nocache(DUM_COM_BASE,
sizeof(u32) * NR_OF_CMDSTRINGS)) == NULL)
return;
for (ch = 0; ch < NR_OF_CMDSTRINGS; ch++)
iowrite32(CMDSTRING_BASEADDR + BYTES_PER_CMDSTRING * ch,
cmdptrs + ch);
for (ch = 0; ch < MAX_DUM_CHANNELS; ch++)
clear_channel(ch);
/* Clear the cmdstrings */
cmdstrings =
(u32 *)ioremap_nocache(*cmdptrs,
BYTES_PER_CMDSTRING * NR_OF_CMDSTRINGS);
if (!cmdstrings)
goto out;
for (i = 0; i < NR_OF_CMDSTRINGS * BYTES_PER_CMDSTRING / sizeof(u32);
i++)
iowrite32(0, cmdstrings + i);
iounmap((u32 *)cmdstrings);
out:
iounmap((u32 *)cmdptrs);
}
static void lcd_init(void)
{
lcd_reset();
DUM_OUTP_FORMAT1 = 0; /* RGB666 */
udelay(1);
iowrite32(V_LCD_STANDBY_OFF, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_USE_9BIT_BUS, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_SYNC_RISE_L, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_SYNC_RISE_H, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_SYNC_FALL_L, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_SYNC_FALL_H, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_SYNC_ENABLE, dum_data.slave_virt_base);
udelay(1);
iowrite32(V_LCD_DISPLAY_ON, dum_data.slave_virt_base);
udelay(1);
}
/* Interface exported to framebuffer drivers */
int pnx4008_get_fb_addresses(int fb_type, void **virt_addr,
dma_addr_t *phys_addr, int *fb_length)
{
int i;
int ret = -1;
for (i = 0; i < ARRAY_SIZE(fb_addr); i++)
if (fb_addr[i].fb_type == fb_type) {
*virt_addr = (void *)(dum_data.lcd_virt_start +
fb_addr[i].addr_offset);
*phys_addr =
dum_data.lcd_phys_start + fb_addr[i].addr_offset;
*fb_length = fb_addr[i].fb_length;
ret = 0;
break;
}
return ret;
}
EXPORT_SYMBOL(pnx4008_get_fb_addresses);
int pnx4008_alloc_dum_channel(int dev_id)
{
int i = 0;
while ((i < MAX_DUM_CHANNELS) && (dum_data.fb_owning_channel[i] != -1))
i++;
if (i == MAX_DUM_CHANNELS)
return -ENORESOURCESLEFT;
else {
dum_data.fb_owning_channel[i] = dev_id;
return i;
}
}
EXPORT_SYMBOL(pnx4008_alloc_dum_channel);
int pnx4008_free_dum_channel(int channr, int dev_id)
{
if (channr < 0 || channr > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[channr] != dev_id)
return -EFBNOTOWNER;
else {
clear_channel(channr);
dum_data.fb_owning_channel[channr] = -1;
}
return 0;
}
EXPORT_SYMBOL(pnx4008_free_dum_channel);
int pnx4008_put_dum_channel_uf(struct dumchannel_uf chan_uf, int dev_id)
{
int i = chan_uf.channelnr;
int ret;
if (i < 0 || i > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[i] != dev_id)
return -EFBNOTOWNER;
else if ((ret =
display_open(chan_uf.channelnr, 0, chan_uf.dirty,
chan_uf.source, chan_uf.y_offset,
chan_uf.x_offset, chan_uf.height,
chan_uf.width)) != 0)
return ret;
else {
dum_data.chan_uf_store[i].dirty = chan_uf.dirty;
dum_data.chan_uf_store[i].source = chan_uf.source;
dum_data.chan_uf_store[i].x_offset = chan_uf.x_offset;
dum_data.chan_uf_store[i].y_offset = chan_uf.y_offset;
dum_data.chan_uf_store[i].width = chan_uf.width;
dum_data.chan_uf_store[i].height = chan_uf.height;
}
return 0;
}
EXPORT_SYMBOL(pnx4008_put_dum_channel_uf);
int pnx4008_set_dum_channel_sync(int channr, int val, int dev_id)
{
if (channr < 0 || channr > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[channr] != dev_id)
return -EFBNOTOWNER;
else {
if (val == CONF_SYNC_ON) {
DUM_CH_CONF(channr) |= CONF_SYNCENABLE;
DUM_CH_CONF(channr) |= DUM_CHANNEL_CFG_SYNC_MASK |
DUM_CHANNEL_CFG_SYNC_MASK_SET;
} else if (val == CONF_SYNC_OFF)
DUM_CH_CONF(channr) &= ~CONF_SYNCENABLE;
else
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(pnx4008_set_dum_channel_sync);
int pnx4008_set_dum_channel_dirty_detect(int channr, int val, int dev_id)
{
if (channr < 0 || channr > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[channr] != dev_id)
return -EFBNOTOWNER;
else {
if (val == CONF_DIRTYDETECTION_ON)
DUM_CH_CONF(channr) |= CONF_DIRTYENABLE;
else if (val == CONF_DIRTYDETECTION_OFF)
DUM_CH_CONF(channr) &= ~CONF_DIRTYENABLE;
else
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(pnx4008_set_dum_channel_dirty_detect);
#if 0 /* Functions not used currently, but likely to be used in future */
static int get_channel(struct dumchannel *p_chan)
{
int i = p_chan->channelnr;
if (i < 0 || i > MAX_DUM_CHANNELS)
return -EINVAL;
else {
p_chan->dum_ch_min = DUM_CH_MIN(i);
p_chan->dum_ch_max = DUM_CH_MAX(i);
p_chan->dum_ch_conf = DUM_CH_CONF(i);
p_chan->dum_ch_stat = DUM_CH_STAT(i);
p_chan->dum_ch_ctrl = 0; /* WriteOnly control register */
}
return 0;
}
int pnx4008_get_dum_channel_uf(struct dumchannel_uf *p_chan_uf, int dev_id)
{
int i = p_chan_uf->channelnr;
if (i < 0 || i > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[i] != dev_id)
return -EFBNOTOWNER;
else {
p_chan_uf->dirty = dum_data.chan_uf_store[i].dirty;
p_chan_uf->source = dum_data.chan_uf_store[i].source;
p_chan_uf->x_offset = dum_data.chan_uf_store[i].x_offset;
p_chan_uf->y_offset = dum_data.chan_uf_store[i].y_offset;
p_chan_uf->width = dum_data.chan_uf_store[i].width;
p_chan_uf->height = dum_data.chan_uf_store[i].height;
}
return 0;
}
EXPORT_SYMBOL(pnx4008_get_dum_channel_uf);
int pnx4008_get_dum_channel_config(int channr, int dev_id)
{
int ret;
struct dumchannel chan;
if (channr < 0 || channr > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[channr] != dev_id)
return -EFBNOTOWNER;
else {
chan.channelnr = channr;
if ((ret = get_channel(&chan)) != 0)
return ret;
}
return (chan.dum_ch_conf & DUM_CHANNEL_CFG_MASK);
}
EXPORT_SYMBOL(pnx4008_get_dum_channel_config);
int pnx4008_force_update_dum_channel(int channr, int dev_id)
{
if (channr < 0 || channr > MAX_DUM_CHANNELS)
return -EINVAL;
else if (dum_data.fb_owning_channel[channr] != dev_id)
return -EFBNOTOWNER;
else
DUM_CH_CTRL(channr) = CTRL_SETDIRTY;
return 0;
}
EXPORT_SYMBOL(pnx4008_force_update_dum_channel);
#endif
int pnx4008_sdum_mmap(struct fb_info *info, struct vm_area_struct *vma,
struct device *dev)
{
unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
if (off < info->fix.smem_len) {
vma->vm_pgoff += 1;
return dma_mmap_writecombine(dev, vma,
(void *)dum_data.lcd_virt_start,
dum_data.lcd_phys_start,
FB_DMA_SIZE);
}
return -EINVAL;
}
EXPORT_SYMBOL(pnx4008_sdum_mmap);
int pnx4008_set_dum_exit_notification(int dev_id)
{
int i;
for (i = 0; i < MAX_DUM_CHANNELS; i++)
if (dum_data.fb_owning_channel[i] == dev_id)
return -ERESOURCESNOTFREED;
return 0;
}
EXPORT_SYMBOL(pnx4008_set_dum_exit_notification);
/* Platform device driver for DUM */
static int sdum_suspend(struct platform_device *pdev, pm_message_t state)
{
int retval = 0;
struct clk *clk;
clk = clk_get(0, "dum_ck");
if (!IS_ERR(clk)) {
clk_set_rate(clk, 0);
clk_put(clk);
} else
retval = PTR_ERR(clk);
/* disable BAC */
DUM_CTRL = V_BAC_DISABLE_IDLE;
/* LCD standby & turn off display */
lcd_reset();
return retval;
}
static int sdum_resume(struct platform_device *pdev)
{
int retval = 0;
struct clk *clk;
clk = clk_get(0, "dum_ck");
if (!IS_ERR(clk)) {
clk_set_rate(clk, 1);
clk_put(clk);
} else
retval = PTR_ERR(clk);
/* wait for BAC disable */
DUM_CTRL = V_BAC_DISABLE_TRIG;
while (DUM_CTRL & BAC_ENABLED)
udelay(10);
/* re-init LCD */
lcd_init();
/* enable BAC and reset MUX */
DUM_CTRL = V_BAC_ENABLE;
udelay(1);
DUM_CTRL = V_MUX_RESET;
return 0;
}
static int __devinit sdum_probe(struct platform_device *pdev)
{
int ret = 0, i = 0;
/* map frame buffer */
dum_data.lcd_virt_start = (u32) dma_alloc_writecombine(&pdev->dev,
FB_DMA_SIZE,
&dum_data.lcd_phys_start,
GFP_KERNEL);
if (!dum_data.lcd_virt_start) {
ret = -ENOMEM;
goto out_3;
}
/* map slave registers */
dum_data.slave_phys_base = PNX4008_DUM_SLAVE_BASE;
dum_data.slave_virt_base =
(u32 *) ioremap_nocache(dum_data.slave_phys_base, sizeof(u32));
if (dum_data.slave_virt_base == NULL) {
ret = -ENOMEM;
goto out_2;
}
/* initialize DUM and LCD display */
ret = dum_init(pdev);
if (ret)
goto out_1;
dum_chan_init();
lcd_init();
DUM_CTRL = V_BAC_ENABLE;
udelay(1);
DUM_CTRL = V_MUX_RESET;
/* set decode address and sync clock divider */
DUM_DECODE = dum_data.lcd_phys_start & DUM_DECODE_MASK;
DUM_CLK_DIV = PNX4008_DUM_CLK_DIV;
for (i = 0; i < MAX_DUM_CHANNELS; i++)
dum_data.fb_owning_channel[i] = -1;
/*setup wakeup interrupt */
start_int_set_rising_edge(SE_DISP_SYNC_INT);
start_int_ack(SE_DISP_SYNC_INT);
start_int_umask(SE_DISP_SYNC_INT);
return 0;
out_1:
iounmap((void *)dum_data.slave_virt_base);
out_2:
dma_free_writecombine(&pdev->dev, FB_DMA_SIZE,
(void *)dum_data.lcd_virt_start,
dum_data.lcd_phys_start);
out_3:
return ret;
}
static int sdum_remove(struct platform_device *pdev)
{
struct clk *clk;
start_int_mask(SE_DISP_SYNC_INT);
clk = clk_get(0, "dum_ck");
if (!IS_ERR(clk)) {
clk_set_rate(clk, 0);
clk_put(clk);
}
iounmap((void *)dum_data.slave_virt_base);
dma_free_writecombine(&pdev->dev, FB_DMA_SIZE,
(void *)dum_data.lcd_virt_start,
dum_data.lcd_phys_start);
return 0;
}
static struct platform_driver sdum_driver = {
.driver = {
.name = "pnx4008-sdum",
},
.probe = sdum_probe,
.remove = sdum_remove,
.suspend = sdum_suspend,
.resume = sdum_resume,
};
int __init sdum_init(void)
{
return platform_driver_register(&sdum_driver);
}
static void __exit sdum_exit(void)
{
platform_driver_unregister(&sdum_driver);
};
module_init(sdum_init);
module_exit(sdum_exit);
MODULE_LICENSE("GPL");
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