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SubjectPATCH - Update s1d13xxxfb to differ between revisions and production ids

The s1d13xxx chip provides two values of identification value.
The Production id (e.g 13506/13505/13806..)
and a revision number 0,1,2,3). Together these
can help us to differ between similiar setups.

This patch adds the proper way of grabbing both
those values and save them for future
reference (= in order to decide what functions
a card supports, e.g acceleration).

We also move away from the concept of
all s1d13xxx = s1d13806 when we really
support alot more.

Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com

diff --git a/drivers/video/s1d13xxxfb.c b/drivers/video/s1d13xxxfb.c
index a7b01d2..38ece73 100644
--- a/drivers/video/s1d13xxxfb.c
+++ b/drivers/video/s1d13xxxfb.c
@@ -50,9 +50,22 @@
#define dbg(fmt, args...) do { } while (0)
#endif

-static const int __devinitconst s1d13xxxfb_revisions[] = {
- S1D13506_CHIP_REV, /* Rev.4 on HP Jornada 7xx S1D13506 */
- S1D13806_CHIP_REV, /* Rev.7 on .. */
+/*
+ * List of card production ids
+ */
+static const int s1d13xxxfb_prod_ids[] = {
+ S1D13505_PROD_ID,
+ S1D13506_PROD_ID,
+ S1D13806_PROD_ID,
+};
+
+/*
+ * List of card strings
+ */
+static const char *s1d13xxxfb_prod_names[] = {
+ "S1D13505",
+ "S1D13506",
+ "S1D13806",
};

/*
@@ -377,7 +390,6 @@ s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
return 0;
}

-
/* framebuffer information structures */

static struct fb_ops s1d13xxxfb_fbops = {
@@ -544,7 +556,7 @@ s1d13xxxfb_probe(struct platform_device *pdev)
struct s1d13xxxfb_pdata *pdata = NULL;
int ret = 0;
int i;
- u8 revision;
+ u8 revision,prod_id;

dbg("probe called: device is %p\n", pdev);

@@ -613,19 +625,31 @@ s1d13xxxfb_probe(struct platform_device *pdev)
goto bail;
}

- revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
-
+ /* production id is top 6 bits */
+ prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
+ /* revision id is lower 2 bits */
+ revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0x3;
ret = -ENODEV;

- for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_revisions); i++) {
- if (revision == s1d13xxxfb_revisions[i])
+ for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
+ if (prod_id == s1d13xxxfb_prod_ids[i]) {
+ /* looks like we got it in our list */
+ default_par->prod_id = prod_id;
+ default_par->revision = revision;
ret = 0;
+ }
+
+ /* jump ship if we find something */
+ if (!ret)
+ break;
}

- if (!ret)
+ if (!ret) {
+ printk(KERN_INFO PFX "chip production id %i = %s\n", prod_id, s1d13xxxfb_prod_names[i]);
printk(KERN_INFO PFX "chip revision %i\n", revision);
- else {
- printk(KERN_INFO PFX "unknown chip revision %i\n", revision);
+ } else {
+ printk(KERN_INFO PFX "unknown chip production id %i, revision %i\n", prod_id, revision);
+ printk(KERN_INFO PFX "please contant maintainer\n");
goto bail;
}


--
Kristoffer Ericson <kristoffer.ericson@gmail.com>
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