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-rw-r--r--drivers/video/sm501fb.c264
1 files changed, 149 insertions, 115 deletions
diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c
index 122a0f8495c..b473cf665d8 100644
--- a/drivers/video/sm501fb.c
+++ b/drivers/video/sm501fb.c
@@ -143,6 +143,8 @@ static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
unsigned int why, size_t size)
{
unsigned int ptr = 0;
+ unsigned int end;
+ struct fb_info *fbi;
switch (why) {
case SM501_MEMF_CURSOR:
@@ -152,7 +154,9 @@ static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
case SM501_MEMF_PANEL:
ptr = inf->fbmem_len - size;
- if (ptr < inf->fb[0]->fix.smem_len)
+ fbi = inf->fb[0];
+
+ if (fbi && ptr < fbi->fix.smem_len)
return -ENOMEM;
break;
@@ -162,11 +166,18 @@ static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
break;
case SM501_MEMF_ACCEL:
- ptr = inf->fb[0]->fix.smem_len;
+ fbi = inf->fb[0];
+ ptr = fbi ? fbi->fix.smem_len : 0;
+
+ fbi = inf->fb[1];
+ if (fbi)
+ end = (fbi->fix.smem_start - inf->fbmem_res->start);
+ else
+ end = inf->fbmem_len;
- if ((ptr + size) >
- (inf->fb[1]->fix.smem_start - inf->fbmem_res->start))
+ if ((ptr + size) > end)
return -ENOMEM;
+
break;
default:
@@ -1228,39 +1239,6 @@ static struct fb_ops sm501fb_ops_pnl = {
.fb_imageblit = cfb_imageblit,
};
-/* sm501fb_info_alloc
- *
- * creates and initialises an sm501fb_info structure
-*/
-
-static struct sm501fb_info *sm501fb_info_alloc(struct fb_info *fbinfo_crt,
- struct fb_info *fbinfo_pnl)
-{
- struct sm501fb_info *info;
- struct sm501fb_par *par;
-
- info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
- if (info) {
- /* set the references back */
-
- par = fbinfo_crt->par;
- par->info = info;
- par->head = HEAD_CRT;
- fbinfo_crt->pseudo_palette = &par->pseudo_palette;
-
- par = fbinfo_pnl->par;
- par->info = info;
- par->head = HEAD_PANEL;
- fbinfo_pnl->pseudo_palette = &par->pseudo_palette;
-
- /* store the two fbs into our info */
- info->fb[HEAD_CRT] = fbinfo_crt;
- info->fb[HEAD_PANEL] = fbinfo_pnl;
- }
-
- return info;
-}
-
/* sm501_init_cursor
*
* initialise hw cursor parameters
@@ -1268,10 +1246,16 @@ static struct sm501fb_info *sm501fb_info_alloc(struct fb_info *fbinfo_crt,
static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
{
- struct sm501fb_par *par = fbi->par;
- struct sm501fb_info *info = par->info;
+ struct sm501fb_par *par;
+ struct sm501fb_info *info;
int ret;
+ if (fbi == NULL)
+ return 0;
+
+ par = fbi->par;
+ info = par->info;
+
par->cursor_regs = info->regs + reg_base;
ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024);
@@ -1299,13 +1283,10 @@ static int sm501fb_start(struct sm501fb_info *info,
struct platform_device *pdev)
{
struct resource *res;
- struct device *dev;
+ struct device *dev = &pdev->dev;
int k;
int ret;
- info->dev = dev = &pdev->dev;
- platform_set_drvdata(pdev, info);
-
info->irq = ret = platform_get_irq(pdev, 0);
if (ret < 0) {
/* we currently do not use the IRQ */
@@ -1408,11 +1389,6 @@ static void sm501fb_stop(struct sm501fb_info *info)
kfree(info->regs_res);
}
-static void sm501fb_info_release(struct sm501fb_info *info)
-{
- kfree(info);
-}
-
static int sm501fb_init_fb(struct fb_info *fb,
enum sm501_controller head,
const char *fbname)
@@ -1557,36 +1533,93 @@ static struct sm501_platdata_fb sm501fb_def_pdata = {
static char driver_name_crt[] = "sm501fb-crt";
static char driver_name_pnl[] = "sm501fb-panel";
-static int __init sm501fb_probe(struct platform_device *pdev)
+static int __devinit sm501fb_probe_one(struct sm501fb_info *info,
+ enum sm501_controller head)
{
- struct sm501fb_info *info;
- struct device *dev = &pdev->dev;
- struct fb_info *fbinfo_crt;
- struct fb_info *fbinfo_pnl;
- int ret;
+ unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
+ struct sm501_platdata_fbsub *pd;
+ struct sm501fb_par *par;
+ struct fb_info *fbi;
- /* allocate our framebuffers */
+ pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
- fbinfo_crt = framebuffer_alloc(sizeof(struct sm501fb_par), dev);
- if (fbinfo_crt == NULL) {
- dev_err(dev, "cannot allocate crt framebuffer\n");
+ /* Do not initialise if we've not been given any platform data */
+ if (pd == NULL) {
+ dev_info(info->dev, "no data for fb %s (disabled)\n", name);
+ return 0;
+ }
+
+ fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
+ if (fbi == NULL) {
+ dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
return -ENOMEM;
}
- fbinfo_pnl = framebuffer_alloc(sizeof(struct sm501fb_par), dev);
- if (fbinfo_pnl == NULL) {
- dev_err(dev, "cannot allocate panel framebuffer\n");
- ret = -ENOMEM;
- goto fbinfo_crt_alloc_fail;
+ par = fbi->par;
+ par->info = info;
+ par->head = head;
+ fbi->pseudo_palette = &par->pseudo_palette;
+
+ info->fb[head] = fbi;
+
+ return 0;
+}
+
+/* Free up anything allocated by sm501fb_init_fb */
+
+static void sm501_free_init_fb(struct sm501fb_info *info,
+ enum sm501_controller head)
+{
+ struct fb_info *fbi = info->fb[head];
+
+ fb_dealloc_cmap(&fbi->cmap);
+}
+
+static int __devinit sm501fb_start_one(struct sm501fb_info *info,
+ enum sm501_controller head,
+ const char *drvname)
+{
+ struct fb_info *fbi = info->fb[head];
+ int ret;
+
+ if (!fbi)
+ return 0;
+
+ ret = sm501fb_init_fb(info->fb[head], head, drvname);
+ if (ret) {
+ dev_err(info->dev, "cannot initialise fb %s\n", drvname);
+ return ret;
+ }
+
+ ret = register_framebuffer(info->fb[head]);
+ if (ret) {
+ dev_err(info->dev, "failed to register fb %s\n", drvname);
+ sm501_free_init_fb(info, head);
+ return ret;
}
- info = sm501fb_info_alloc(fbinfo_crt, fbinfo_pnl);
- if (info == NULL) {
- dev_err(dev, "cannot allocate par\n");
- ret = -ENOMEM;
- goto sm501fb_alloc_fail;
+ dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
+
+ return 0;
+}
+
+static int __devinit sm501fb_probe(struct platform_device *pdev)
+{
+ struct sm501fb_info *info;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ /* allocate our framebuffers */
+
+ info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
+ if (!info) {
+ dev_err(dev, "failed to allocate state\n");
+ return -ENOMEM;
}
+ info->dev = dev = &pdev->dev;
+ platform_set_drvdata(pdev, info);
+
if (dev->parent->platform_data) {
struct sm501_platdata *pd = dev->parent->platform_data;
info->pdata = pd->fb;
@@ -1597,90 +1630,88 @@ static int __init sm501fb_probe(struct platform_device *pdev)
info->pdata = &sm501fb_def_pdata;
}
- /* start the framebuffers */
+ /* probe for the presence of each panel */
- ret = sm501fb_start(info, pdev);
- if (ret) {
- dev_err(dev, "cannot initialise SM501\n");
- goto sm501fb_start_fail;
+ ret = sm501fb_probe_one(info, HEAD_CRT);
+ if (ret < 0) {
+ dev_err(dev, "failed to probe CRT\n");
+ goto err_alloc;
}
- /* CRT framebuffer setup */
+ ret = sm501fb_probe_one(info, HEAD_PANEL);
+ if (ret < 0) {
+ dev_err(dev, "failed to probe PANEL\n");
+ goto err_probed_crt;
+ }
- ret = sm501fb_init_fb(fbinfo_crt, HEAD_CRT, driver_name_crt);
- if (ret) {
- dev_err(dev, "cannot initialise CRT fb\n");
- goto sm501fb_start_fail;
+ if (info->fb[HEAD_PANEL] == NULL &&
+ info->fb[HEAD_CRT] == NULL) {
+ dev_err(dev, "no framebuffers found\n");
+ goto err_alloc;
}
- /* Panel framebuffer setup */
+ /* get the resources for both of the framebuffers */
- ret = sm501fb_init_fb(fbinfo_pnl, HEAD_PANEL, driver_name_pnl);
+ ret = sm501fb_start(info, pdev);
if (ret) {
- dev_err(dev, "cannot initialise Panel fb\n");
- goto sm501fb_start_fail;
+ dev_err(dev, "cannot initialise SM501\n");
+ goto err_probed_panel;
}
- /* register framebuffers */
-
- ret = register_framebuffer(fbinfo_crt);
- if (ret < 0) {
- dev_err(dev, "failed to register CRT fb (%d)\n", ret);
- goto register_crt_fail;
+ ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
+ if (ret) {
+ dev_err(dev, "failed to start CRT\n");
+ goto err_started;
}
- ret = register_framebuffer(fbinfo_pnl);
- if (ret < 0) {
- dev_err(dev, "failed to register panel fb (%d)\n", ret);
- goto register_pnl_fail;
+ ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
+ if (ret) {
+ dev_err(dev, "failed to start Panel\n");
+ goto err_started_crt;
}
- dev_info(dev, "fb%d: %s frame buffer device\n",
- fbinfo_crt->node, fbinfo_crt->fix.id);
-
- dev_info(dev, "fb%d: %s frame buffer device\n",
- fbinfo_pnl->node, fbinfo_pnl->fix.id);
-
/* create device files */
ret = device_create_file(dev, &dev_attr_crt_src);
if (ret)
- goto crtsrc_fail;
+ goto err_started_panel;
ret = device_create_file(dev, &dev_attr_fbregs_pnl);
if (ret)
- goto fbregs_pnl_fail;
+ goto err_attached_crtsrc_file;
ret = device_create_file(dev, &dev_attr_fbregs_crt);
if (ret)
- goto fbregs_crt_fail;
+ goto err_attached_pnlregs_file;
/* we registered, return ok */
return 0;
- fbregs_crt_fail:
+err_attached_pnlregs_file:
device_remove_file(dev, &dev_attr_fbregs_pnl);
- fbregs_pnl_fail:
+err_attached_crtsrc_file:
device_remove_file(dev, &dev_attr_crt_src);
- crtsrc_fail:
- unregister_framebuffer(fbinfo_pnl);
+err_started_panel:
+ unregister_framebuffer(info->fb[HEAD_PANEL]);
+ sm501_free_init_fb(info, HEAD_PANEL);
- register_pnl_fail:
- unregister_framebuffer(fbinfo_crt);
+err_started_crt:
+ unregister_framebuffer(info->fb[HEAD_CRT]);
+ sm501_free_init_fb(info, HEAD_CRT);
- register_crt_fail:
+err_started:
sm501fb_stop(info);
- sm501fb_start_fail:
- sm501fb_info_release(info);
+err_probed_panel:
+ framebuffer_release(info->fb[HEAD_PANEL]);
- sm501fb_alloc_fail:
- framebuffer_release(fbinfo_pnl);
+err_probed_crt:
+ framebuffer_release(info->fb[HEAD_CRT]);
- fbinfo_crt_alloc_fail:
- framebuffer_release(fbinfo_crt);
+err_alloc:
+ kfree(info);
return ret;
}
@@ -1699,11 +1730,14 @@ static int sm501fb_remove(struct platform_device *pdev)
device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
device_remove_file(&pdev->dev, &dev_attr_crt_src);
+ sm501_free_init_fb(info, HEAD_CRT);
+ sm501_free_init_fb(info, HEAD_PANEL);
+
unregister_framebuffer(fbinfo_crt);
unregister_framebuffer(fbinfo_pnl);
sm501fb_stop(info);
- sm501fb_info_release(info);
+ kfree(info);
framebuffer_release(fbinfo_pnl);
framebuffer_release(fbinfo_crt);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-18 02:02:29 +0000