linux/drivers/video/sh_mobile_lcdcfb.c

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/*
* SuperH Mobile LCDC Framebuffer
*
* Copyright (c) 2008 Magnus Damm
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/ioctl.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <video/sh_mobile_lcdc.h>
#include <asm/atomic.h>
#define PALETTE_NR 16
#define SIDE_B_OFFSET 0x1000
#define MIRROR_OFFSET 0x2000
/* shared registers */
#define _LDDCKR 0x410
#define _LDDCKSTPR 0x414
#define _LDINTR 0x468
#define _LDSR 0x46c
#define _LDCNT1R 0x470
#define _LDCNT2R 0x474
#define _LDRCNTR 0x478
#define _LDDDSR 0x47c
#define _LDDWD0R 0x800
#define _LDDRDR 0x840
#define _LDDWAR 0x900
#define _LDDRAR 0x904
/* shared registers and their order for context save/restore */
static int lcdc_shared_regs[] = {
_LDDCKR,
_LDDCKSTPR,
_LDINTR,
_LDDDSR,
_LDCNT1R,
_LDCNT2R,
};
#define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
/* per-channel registers */
enum { LDDCKPAT1R, LDDCKPAT2R, LDMT1R, LDMT2R, LDMT3R, LDDFR, LDSM1R,
LDSM2R, LDSA1R, LDMLSR, LDHCNR, LDHSYNR, LDVLNR, LDVSYNR, LDPMR,
NR_CH_REGS };
static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
[LDDCKPAT1R] = 0x400,
[LDDCKPAT2R] = 0x404,
[LDMT1R] = 0x418,
[LDMT2R] = 0x41c,
[LDMT3R] = 0x420,
[LDDFR] = 0x424,
[LDSM1R] = 0x428,
[LDSM2R] = 0x42c,
[LDSA1R] = 0x430,
[LDMLSR] = 0x438,
[LDHCNR] = 0x448,
[LDHSYNR] = 0x44c,
[LDVLNR] = 0x450,
[LDVSYNR] = 0x454,
[LDPMR] = 0x460,
};
static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
[LDDCKPAT1R] = 0x408,
[LDDCKPAT2R] = 0x40c,
[LDMT1R] = 0x600,
[LDMT2R] = 0x604,
[LDMT3R] = 0x608,
[LDDFR] = 0x60c,
[LDSM1R] = 0x610,
[LDSM2R] = 0x614,
[LDSA1R] = 0x618,
[LDMLSR] = 0x620,
[LDHCNR] = 0x624,
[LDHSYNR] = 0x628,
[LDVLNR] = 0x62c,
[LDVSYNR] = 0x630,
[LDPMR] = 0x63c,
};
#define START_LCDC 0x00000001
#define LCDC_RESET 0x00000100
#define DISPLAY_BEU 0x00000008
#define LCDC_ENABLE 0x00000001
#define LDINTR_FE 0x00000400
#define LDINTR_VSE 0x00000200
#define LDINTR_VEE 0x00000100
#define LDINTR_FS 0x00000004
#define LDINTR_VSS 0x00000002
#define LDINTR_VES 0x00000001
#define LDRCNTR_SRS 0x00020000
#define LDRCNTR_SRC 0x00010000
#define LDRCNTR_MRS 0x00000002
#define LDRCNTR_MRC 0x00000001
#define LDSR_MRS 0x00000100
struct sh_mobile_lcdc_priv;
struct sh_mobile_lcdc_chan {
struct sh_mobile_lcdc_priv *lcdc;
unsigned long *reg_offs;
unsigned long ldmt1r_value;
unsigned long enabled; /* ME and SE in LDCNT2R */
struct sh_mobile_lcdc_chan_cfg cfg;
u32 pseudo_palette[PALETTE_NR];
unsigned long saved_ch_regs[NR_CH_REGS];
struct fb_info *info;
dma_addr_t dma_handle;
struct fb_deferred_io defio;
struct scatterlist *sglist;
unsigned long frame_end;
unsigned long pan_offset;
wait_queue_head_t frame_end_wait;
struct completion vsync_completion;
};
struct sh_mobile_lcdc_priv {
void __iomem *base;
int irq;
atomic_t hw_usecnt;
struct device *dev;
struct clk *dot_clk;
unsigned long lddckr;
struct sh_mobile_lcdc_chan ch[2];
unsigned long saved_shared_regs[NR_SHARED_REGS];
int started;
};
static bool banked(int reg_nr)
{
switch (reg_nr) {
case LDMT1R:
case LDMT2R:
case LDMT3R:
case LDDFR:
case LDSM1R:
case LDSA1R:
case LDMLSR:
case LDHCNR:
case LDHSYNR:
case LDVLNR:
case LDVSYNR:
return true;
}
return false;
}
static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
int reg_nr, unsigned long data)
{
iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
if (banked(reg_nr))
iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
SIDE_B_OFFSET);
}
static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
int reg_nr, unsigned long data)
{
iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
MIRROR_OFFSET);
}
static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
int reg_nr)
{
return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
}
static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
unsigned long reg_offs, unsigned long data)
{
iowrite32(data, priv->base + reg_offs);
}
static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
unsigned long reg_offs)
{
return ioread32(priv->base + reg_offs);
}
static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
unsigned long reg_offs,
unsigned long mask, unsigned long until)
{
while ((lcdc_read(priv, reg_offs) & mask) != until)
cpu_relax();
}
static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
{
return chan->cfg.chan == LCDC_CHAN_SUBLCD;
}
static void lcdc_sys_write_index(void *handle, unsigned long data)
{
struct sh_mobile_lcdc_chan *ch = handle;
lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
}
static void lcdc_sys_write_data(void *handle, unsigned long data)
{
struct sh_mobile_lcdc_chan *ch = handle;
lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
}
static unsigned long lcdc_sys_read_data(void *handle)
{
struct sh_mobile_lcdc_chan *ch = handle;
lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
udelay(1);
lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
}
struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
lcdc_sys_write_index,
lcdc_sys_write_data,
lcdc_sys_read_data,
};
static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
{
if (atomic_inc_and_test(&priv->hw_usecnt)) {
pm_runtime_get_sync(priv->dev);
if (priv->dot_clk)
clk_enable(priv->dot_clk);
}
}
static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
{
if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
if (priv->dot_clk)
clk_disable(priv->dot_clk);
pm_runtime_put(priv->dev);
}
}
static int sh_mobile_lcdc_sginit(struct fb_info *info,
struct list_head *pagelist)
{
struct sh_mobile_lcdc_chan *ch = info->par;
unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
struct page *page;
int nr_pages = 0;
sg_init_table(ch->sglist, nr_pages_max);
list_for_each_entry(page, pagelist, lru)
sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
return nr_pages;
}
static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
struct list_head *pagelist)
{
struct sh_mobile_lcdc_chan *ch = info->par;
struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
/* enable clocks before accessing hardware */
sh_mobile_lcdc_clk_on(ch->lcdc);
/*
* It's possible to get here without anything on the pagelist via
* sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
* invocation. In the former case, the acceleration routines are
* stepped in to when using the framebuffer console causing the
* workqueue to be scheduled without any dirty pages on the list.
*
* Despite this, a panel update is still needed given that the
* acceleration routines have their own methods for writing in
* that still need to be updated.
*
* The fsync() and empty pagelist case could be optimized for,
* but we don't bother, as any application exhibiting such
* behaviour is fundamentally broken anyways.
*/
if (!list_empty(pagelist)) {
unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
/* trigger panel update */
dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
if (bcfg->start_transfer)
bcfg->start_transfer(bcfg->board_data, ch,
&sh_mobile_lcdc_sys_bus_ops);
lcdc_write_chan(ch, LDSM2R, 1);
dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
} else {
if (bcfg->start_transfer)
bcfg->start_transfer(bcfg->board_data, ch,
&sh_mobile_lcdc_sys_bus_ops);
lcdc_write_chan(ch, LDSM2R, 1);
}
}
static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
{
struct fb_deferred_io *fbdefio = info->fbdefio;
if (fbdefio)
schedule_delayed_work(&info->deferred_work, fbdefio->delay);
}
static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
{
struct sh_mobile_lcdc_priv *priv = data;
struct sh_mobile_lcdc_chan *ch;
unsigned long tmp;
unsigned long ldintr;
int is_sub;
int k;
/* acknowledge interrupt */
ldintr = tmp = lcdc_read(priv, _LDINTR);
/*
* disable further VSYNC End IRQs, preserve all other enabled IRQs,
* write 0 to bits 0-6 to ack all triggered IRQs.
*/
tmp &= 0xffffff00 & ~LDINTR_VEE;
lcdc_write(priv, _LDINTR, tmp);
/* figure out if this interrupt is for main or sub lcd */
is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
/* wake up channel and disable clocks */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
if (!ch->enabled)
continue;
/* Frame Start */
if (ldintr & LDINTR_FS) {
if (is_sub == lcdc_chan_is_sublcd(ch)) {
ch->frame_end = 1;
wake_up(&ch->frame_end_wait);
sh_mobile_lcdc_clk_off(priv);
}
}
/* VSYNC End */
if (ldintr & LDINTR_VES)
complete(&ch->vsync_completion);
}
return IRQ_HANDLED;
}
static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
int start)
{
unsigned long tmp = lcdc_read(priv, _LDCNT2R);
int k;
/* start or stop the lcdc */
if (start)
lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
else
lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
/* wait until power is applied/stopped on all channels */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
while (1) {
tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
if (start && tmp == 3)
break;
if (!start && tmp == 0)
break;
cpu_relax();
}
if (!start)
lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
}
static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
{
struct sh_mobile_lcdc_chan *ch;
struct fb_videomode *lcd_cfg;
struct sh_mobile_lcdc_board_cfg *board_cfg;
unsigned long tmp;
int k, m;
int ret = 0;
/* enable clocks before accessing the hardware */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
if (priv->ch[k].enabled)
sh_mobile_lcdc_clk_on(priv);
/* reset */
lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
/* enable LCDC channels */
tmp = lcdc_read(priv, _LDCNT2R);
tmp |= priv->ch[0].enabled;
tmp |= priv->ch[1].enabled;
lcdc_write(priv, _LDCNT2R, tmp);
/* read data from external memory, avoid using the BEU for now */
lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
/* stop the lcdc first */
sh_mobile_lcdc_start_stop(priv, 0);
/* configure clocks */
tmp = priv->lddckr;
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
if (!priv->ch[k].enabled)
continue;
m = ch->cfg.clock_divider;
if (!m)
continue;
if (m == 1)
m = 1 << 6;
tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
lcdc_write_chan(ch, LDDCKPAT1R, 0x00000000);
lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
}
lcdc_write(priv, _LDDCKR, tmp);
/* start dotclock again */
lcdc_write(priv, _LDDCKSTPR, 0);
lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
/* interrupts are disabled to begin with */
lcdc_write(priv, _LDINTR, 0);
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
lcd_cfg = &ch->cfg.lcd_cfg;
if (!ch->enabled)
continue;
tmp = ch->ldmt1r_value;
tmp |= (lcd_cfg->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
tmp |= (lcd_cfg->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
lcdc_write_chan(ch, LDMT1R, tmp);
/* setup SYS bus */
lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
/* horizontal configuration */
tmp = lcd_cfg->xres + lcd_cfg->hsync_len;
tmp += lcd_cfg->left_margin;
tmp += lcd_cfg->right_margin;
tmp /= 8; /* HTCN */
tmp |= (lcd_cfg->xres / 8) << 16; /* HDCN */
lcdc_write_chan(ch, LDHCNR, tmp);
tmp = lcd_cfg->xres;
tmp += lcd_cfg->right_margin;
tmp /= 8; /* HSYNP */
tmp |= (lcd_cfg->hsync_len / 8) << 16; /* HSYNW */
lcdc_write_chan(ch, LDHSYNR, tmp);
/* power supply */
lcdc_write_chan(ch, LDPMR, 0);
/* vertical configuration */
tmp = lcd_cfg->yres + lcd_cfg->vsync_len;
tmp += lcd_cfg->upper_margin;
tmp += lcd_cfg->lower_margin; /* VTLN */
tmp |= lcd_cfg->yres << 16; /* VDLN */
lcdc_write_chan(ch, LDVLNR, tmp);
tmp = lcd_cfg->yres;
tmp += lcd_cfg->lower_margin; /* VSYNP */
tmp |= lcd_cfg->vsync_len << 16; /* VSYNW */
lcdc_write_chan(ch, LDVSYNR, tmp);
board_cfg = &ch->cfg.board_cfg;
if (board_cfg->setup_sys)
ret = board_cfg->setup_sys(board_cfg->board_data, ch,
&sh_mobile_lcdc_sys_bus_ops);
if (ret)
return ret;
}
/* word and long word swap */
lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
if (!priv->ch[k].enabled)
continue;
/* set bpp format in PKF[4:0] */
tmp = lcdc_read_chan(ch, LDDFR);
tmp &= ~(0x0001001f);
tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0;
lcdc_write_chan(ch, LDDFR, tmp);
/* point out our frame buffer */
lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
/* set line size */
lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
/* setup deferred io if SYS bus */
tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
if (ch->ldmt1r_value & (1 << 12) && tmp) {
ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
ch->defio.delay = msecs_to_jiffies(tmp);
ch->info->fbdefio = &ch->defio;
fb_deferred_io_init(ch->info);
/* one-shot mode */
lcdc_write_chan(ch, LDSM1R, 1);
/* enable "Frame End Interrupt Enable" bit */
lcdc_write(priv, _LDINTR, LDINTR_FE);
} else {
/* continuous read mode */
lcdc_write_chan(ch, LDSM1R, 0);
}
}
/* display output */
lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
/* start the lcdc */
sh_mobile_lcdc_start_stop(priv, 1);
priv->started = 1;
/* tell the board code to enable the panel */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
if (!ch->enabled)
continue;
board_cfg = &ch->cfg.board_cfg;
if (board_cfg->display_on)
board_cfg->display_on(board_cfg->board_data);
}
return 0;
}
static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
{
struct sh_mobile_lcdc_chan *ch;
struct sh_mobile_lcdc_board_cfg *board_cfg;
int k;
/* clean up deferred io and ask board code to disable panel */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
ch = &priv->ch[k];
if (!ch->enabled)
continue;
/* deferred io mode:
* flush frame, and wait for frame end interrupt
* clean up deferred io and enable clock
*/
if (ch->info->fbdefio) {
ch->frame_end = 0;
schedule_delayed_work(&ch->info->deferred_work, 0);
wait_event(ch->frame_end_wait, ch->frame_end);
fb_deferred_io_cleanup(ch->info);
ch->info->fbdefio = NULL;
sh_mobile_lcdc_clk_on(priv);
}
board_cfg = &ch->cfg.board_cfg;
if (board_cfg->display_off)
board_cfg->display_off(board_cfg->board_data);
}
/* stop the lcdc */
if (priv->started) {
sh_mobile_lcdc_start_stop(priv, 0);
priv->started = 0;
}
/* stop clocks */
for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
if (priv->ch[k].enabled)
sh_mobile_lcdc_clk_off(priv);
}
static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
{
int ifm, miftyp;
switch (ch->cfg.interface_type) {
case RGB8: ifm = 0; miftyp = 0; break;
case RGB9: ifm = 0; miftyp = 4; break;
case RGB12A: ifm = 0; miftyp = 5; break;
case RGB12B: ifm = 0; miftyp = 6; break;
case RGB16: ifm = 0; miftyp = 7; break;
case RGB18: ifm = 0; miftyp = 10; break;
case RGB24: ifm = 0; miftyp = 11; break;
case SYS8A: ifm = 1; miftyp = 0; break;
case SYS8B: ifm = 1; miftyp = 1; break;
case SYS8C: ifm = 1; miftyp = 2; break;
case SYS8D: ifm = 1; miftyp = 3; break;
case SYS9: ifm = 1; miftyp = 4; break;
case SYS12: ifm = 1; miftyp = 5; break;
case SYS16A: ifm = 1; miftyp = 7; break;
case SYS16B: ifm = 1; miftyp = 8; break;
case SYS16C: ifm = 1; miftyp = 9; break;
case SYS18: ifm = 1; miftyp = 10; break;
case SYS24: ifm = 1; miftyp = 11; break;
default: goto bad;
}
/* SUBLCD only supports SYS interface */
if (lcdc_chan_is_sublcd(ch)) {
if (ifm == 0)
goto bad;
else
ifm = 0;
}
ch->ldmt1r_value = (ifm << 12) | miftyp;
return 0;
bad:
return -EINVAL;
}
static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
int clock_source,
struct sh_mobile_lcdc_priv *priv)
{
char *str;
int icksel;
switch (clock_source) {
case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
default:
return -EINVAL;
}
priv->lddckr = icksel << 16;
if (str) {
priv->dot_clk = clk_get(&pdev->dev, str);
if (IS_ERR(priv->dot_clk)) {
dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
return PTR_ERR(priv->dot_clk);
}
}
atomic_set(&priv->hw_usecnt, -1);
/* Runtime PM support involves two step for this driver:
* 1) Enable Runtime PM
* 2) Force Runtime PM Resume since hardware is accessed from probe()
*/
priv->dev = &pdev->dev;
pm_runtime_enable(priv->dev);
pm_runtime_resume(priv->dev);
return 0;
}
static int sh_mobile_lcdc_setcolreg(u_int regno,
u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
u32 *palette = info->pseudo_palette;
if (regno >= PALETTE_NR)
return -EINVAL;
/* only FB_VISUAL_TRUECOLOR supported */
red >>= 16 - info->var.red.length;
green >>= 16 - info->var.green.length;
blue >>= 16 - info->var.blue.length;
transp >>= 16 - info->var.transp.length;
palette[regno] = (red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset) |
(transp << info->var.transp.offset);
return 0;
}
static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
.id = "SH Mobile LCDC",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.accel = FB_ACCEL_NONE,
.xpanstep = 0,
.ypanstep = 1,
.ywrapstep = 0,
};
static void sh_mobile_lcdc_fillrect(struct fb_info *info,
const struct fb_fillrect *rect)
{
sys_fillrect(info, rect);
sh_mobile_lcdc_deferred_io_touch(info);
}
static void sh_mobile_lcdc_copyarea(struct fb_info *info,
const struct fb_copyarea *area)
{
sys_copyarea(info, area);
sh_mobile_lcdc_deferred_io_touch(info);
}
static void sh_mobile_lcdc_imageblit(struct fb_info *info,
const struct fb_image *image)
{
sys_imageblit(info, image);
sh_mobile_lcdc_deferred_io_touch(info);
}
static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct sh_mobile_lcdc_chan *ch = info->par;
struct sh_mobile_lcdc_priv *priv = ch->lcdc;
unsigned long ldrcntr;
unsigned long new_pan_offset;
new_pan_offset = (var->yoffset * info->fix.line_length) +
(var->xoffset * (info->var.bits_per_pixel / 8));
if (new_pan_offset == ch->pan_offset)
return 0; /* No change, do nothing */
ldrcntr = lcdc_read(priv, _LDRCNTR);
/* Set the source address for the next refresh */
lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
if (lcdc_chan_is_sublcd(ch))
lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
else
lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
ch->pan_offset = new_pan_offset;
sh_mobile_lcdc_deferred_io_touch(info);
return 0;
}
static int sh_mobile_wait_for_vsync(struct fb_info *info)
{
struct sh_mobile_lcdc_chan *ch = info->par;
unsigned long ldintr;
int ret;
/* Enable VSync End interrupt */
ldintr = lcdc_read(ch->lcdc, _LDINTR);
ldintr |= LDINTR_VEE;
lcdc_write(ch->lcdc, _LDINTR, ldintr);
ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
msecs_to_jiffies(100));
if (!ret)
return -ETIMEDOUT;
return 0;
}
static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg)
{
int retval;
switch (cmd) {
case FBIO_WAITFORVSYNC:
retval = sh_mobile_wait_for_vsync(info);
break;
default:
retval = -ENOIOCTLCMD;
break;
}
return retval;
}
static struct fb_ops sh_mobile_lcdc_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = sh_mobile_lcdc_setcolreg,
.fb_read = fb_sys_read,
.fb_write = fb_sys_write,
.fb_fillrect = sh_mobile_lcdc_fillrect,
.fb_copyarea = sh_mobile_lcdc_copyarea,
.fb_imageblit = sh_mobile_lcdc_imageblit,
.fb_pan_display = sh_mobile_fb_pan_display,
.fb_ioctl = sh_mobile_ioctl,
};
static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
{
switch (bpp) {
case 16: /* PKF[4:0] = 00011 - RGB 565 */
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 32: /* PKF[4:0] = 00000 - RGB 888
* sh7722 pdf says 00RRGGBB but reality is GGBB00RR
* this may be because LDDDSR has word swap enabled..
*/
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 24;
var->green.length = 8;
var->blue.offset = 16;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
default:
return -EINVAL;
}
var->bits_per_pixel = bpp;
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.msb_right = 0;
return 0;
}
static int sh_mobile_lcdc_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
return 0;
}
static int sh_mobile_lcdc_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
}
static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
struct sh_mobile_lcdc_chan *ch;
int k, n;
/* save per-channel registers */
for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
ch = &p->ch[k];
if (!ch->enabled)
continue;
for (n = 0; n < NR_CH_REGS; n++)
ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
}
/* save shared registers */
for (n = 0; n < NR_SHARED_REGS; n++)
p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
/* turn off LCDC hardware */
lcdc_write(p, _LDCNT1R, 0);
return 0;
}
static int sh_mobile_lcdc_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
struct sh_mobile_lcdc_chan *ch;
int k, n;
/* restore per-channel registers */
for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
ch = &p->ch[k];
if (!ch->enabled)
continue;
for (n = 0; n < NR_CH_REGS; n++)
lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
}
/* restore shared registers */
for (n = 0; n < NR_SHARED_REGS; n++)
lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
return 0;
}
static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
.suspend = sh_mobile_lcdc_suspend,
.resume = sh_mobile_lcdc_resume,
.runtime_suspend = sh_mobile_lcdc_runtime_suspend,
.runtime_resume = sh_mobile_lcdc_runtime_resume,
};
static int sh_mobile_lcdc_remove(struct platform_device *pdev);
platform-drivers: move probe to .devinit.text in drivers/video A pointer to a probe callback is passed to the core via platform_driver_register and so the function must not disappear when the .init sections are discarded. Otherwise (if also having HOTPLUG=y) unbinding and binding a device to the driver via sysfs will result in an oops as does a device being registered late. An alternative to this patch is using platform_driver_probe instead of platform_driver_register plus removing the pointer to the probe function from the struct platform_driver. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Adrian Bunk <bunk@stusta.de> Cc: Alberto Mardegan <mardy@users.sourceforge.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andriy Skulysh <askulysh@gmail.com> Cc: Antonino Daplas <adaplas@gmail.com> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Chandramouli Narayanan <mouli@linux.intel.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Frans Pop <elendil@planet.nl> Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Helge Deller <deller@gmx.de> Cc: Huang Ying <ying.huang@intel.com> Cc: Ian Molton <spyro@f2s.com> Cc: Joshua Kinard <kumba@gentoo.org> Cc: Kaj-Michael Lang <milang@tal.org> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: linux-fbdev-devel@lists.sourceforge.net Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Magnus Damm <damm@igel.co.jp> Cc: Martin Michlmayr <tbm@cyrius.com> Cc: Matthias Kaehlcke <matthias@kaehlcke.net> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Pavel Machek <pavel@suse.cz> Cc: Philipp Zabel <philipp.zabel@gmail.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Roel Kluin <roel.kluin@gmail.com> Cc: Roland Stigge <stigge@antcom.de> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Vincent Sanders <vince@simtec.co.uk> Cc: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Arnaud Patard <arnaud.patard@rtp-net.org> Acked-by: James Simmons <jsimmons@infradead.org> Acked-by: Peter Jones <pjones@redhat.com> Acked-by: Jaya Kumar <jayakumar.lkml@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-02-04 19:56:51 +00:00
static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
{
struct fb_info *info;
struct sh_mobile_lcdc_priv *priv;
struct sh_mobile_lcdc_info *pdata;
struct sh_mobile_lcdc_chan_cfg *cfg;
struct resource *res;
int error;
void *buf;
int i, j;
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "no platform data defined\n");
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
i = platform_get_irq(pdev, 0);
if (!res || i < 0) {
dev_err(&pdev->dev, "cannot get platform resources\n");
return -ENOENT;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
dev_err(&pdev->dev, "cannot allocate device data\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, priv);
error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
dev_name(&pdev->dev), priv);
if (error) {
dev_err(&pdev->dev, "unable to request irq\n");
goto err1;
}
priv->irq = i;
pdata = pdev->dev.platform_data;
j = 0;
for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
priv->ch[j].lcdc = priv;
memcpy(&priv->ch[j].cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
error = sh_mobile_lcdc_check_interface(&priv->ch[i]);
if (error) {
dev_err(&pdev->dev, "unsupported interface type\n");
goto err1;
}
init_waitqueue_head(&priv->ch[i].frame_end_wait);
init_completion(&priv->ch[i].vsync_completion);
priv->ch[j].pan_offset = 0;
switch (pdata->ch[i].chan) {
case LCDC_CHAN_MAINLCD:
priv->ch[j].enabled = 1 << 1;
priv->ch[j].reg_offs = lcdc_offs_mainlcd;
j++;
break;
case LCDC_CHAN_SUBLCD:
priv->ch[j].enabled = 1 << 2;
priv->ch[j].reg_offs = lcdc_offs_sublcd;
j++;
break;
}
}
if (!j) {
dev_err(&pdev->dev, "no channels defined\n");
error = -EINVAL;
goto err1;
}
error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
if (error) {
dev_err(&pdev->dev, "unable to setup clocks\n");
goto err1;
}
priv->base = ioremap_nocache(res->start, (res->end - res->start) + 1);
for (i = 0; i < j; i++) {
cfg = &priv->ch[i].cfg;
priv->ch[i].info = framebuffer_alloc(0, &pdev->dev);
if (!priv->ch[i].info) {
dev_err(&pdev->dev, "unable to allocate fb_info\n");
error = -ENOMEM;
break;
}
info = priv->ch[i].info;
info->fbops = &sh_mobile_lcdc_ops;
info->var.xres = info->var.xres_virtual = cfg->lcd_cfg.xres;
info->var.yres = cfg->lcd_cfg.yres;
/* Default Y virtual resolution is 2x panel size */
info->var.yres_virtual = info->var.yres * 2;
info->var.width = cfg->lcd_size_cfg.width;
info->var.height = cfg->lcd_size_cfg.height;
info->var.activate = FB_ACTIVATE_NOW;
error = sh_mobile_lcdc_set_bpp(&info->var, cfg->bpp);
if (error)
break;
info->fix = sh_mobile_lcdc_fix;
info->fix.line_length = cfg->lcd_cfg.xres * (cfg->bpp / 8);
info->fix.smem_len = info->fix.line_length *
info->var.yres_virtual;
buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
&priv->ch[i].dma_handle, GFP_KERNEL);
if (!buf) {
dev_err(&pdev->dev, "unable to allocate buffer\n");
error = -ENOMEM;
break;
}
info->pseudo_palette = &priv->ch[i].pseudo_palette;
info->flags = FBINFO_FLAG_DEFAULT;
error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
if (error < 0) {
dev_err(&pdev->dev, "unable to allocate cmap\n");
dma_free_coherent(&pdev->dev, info->fix.smem_len,
buf, priv->ch[i].dma_handle);
break;
}
memset(buf, 0, info->fix.smem_len);
info->fix.smem_start = priv->ch[i].dma_handle;
info->screen_base = buf;
info->device = &pdev->dev;
info->par = &priv->ch[i];
}
if (error)
goto err1;
error = sh_mobile_lcdc_start(priv);
if (error) {
dev_err(&pdev->dev, "unable to start hardware\n");
goto err1;
}
for (i = 0; i < j; i++) {
struct sh_mobile_lcdc_chan *ch = priv->ch + i;
info = ch->info;
if (info->fbdefio) {
ch->sglist = vmalloc(sizeof(struct scatterlist) *
info->fix.smem_len >> PAGE_SHIFT);
if (!ch->sglist) {
dev_err(&pdev->dev, "cannot allocate sglist\n");
goto err1;
}
}
error = register_framebuffer(info);
if (error < 0)
goto err1;
dev_info(info->dev,
"registered %s/%s as %dx%d %dbpp.\n",
pdev->name,
(ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
"mainlcd" : "sublcd",
(int) ch->cfg.lcd_cfg.xres,
(int) ch->cfg.lcd_cfg.yres,
ch->cfg.bpp);
/* deferred io mode: disable clock to save power */
if (info->fbdefio)
sh_mobile_lcdc_clk_off(priv);
}
return 0;
err1:
sh_mobile_lcdc_remove(pdev);
return error;
}
static int sh_mobile_lcdc_remove(struct platform_device *pdev)
{
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
struct fb_info *info;
int i;
for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
if (priv->ch[i].info && priv->ch[i].info->dev)
unregister_framebuffer(priv->ch[i].info);
sh_mobile_lcdc_stop(priv);
for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
info = priv->ch[i].info;
if (!info || !info->device)
continue;
if (priv->ch[i].sglist)
vfree(priv->ch[i].sglist);
dma_free_coherent(&pdev->dev, info->fix.smem_len,
info->screen_base, priv->ch[i].dma_handle);
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
if (priv->dot_clk)
clk_put(priv->dot_clk);
if (priv->dev)
pm_runtime_disable(priv->dev);
if (priv->base)
iounmap(priv->base);
if (priv->irq)
free_irq(priv->irq, priv);
kfree(priv);
return 0;
}
static struct platform_driver sh_mobile_lcdc_driver = {
.driver = {
.name = "sh_mobile_lcdc_fb",
.owner = THIS_MODULE,
.pm = &sh_mobile_lcdc_dev_pm_ops,
},
.probe = sh_mobile_lcdc_probe,
.remove = sh_mobile_lcdc_remove,
};
static int __init sh_mobile_lcdc_init(void)
{
return platform_driver_register(&sh_mobile_lcdc_driver);
}
static void __exit sh_mobile_lcdc_exit(void)
{
platform_driver_unregister(&sh_mobile_lcdc_driver);
}
module_init(sh_mobile_lcdc_init);
module_exit(sh_mobile_lcdc_exit);
MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
MODULE_LICENSE("GPL v2");