Re: [PATCH] wireless-2.6 zd1211rw check against regulatory domain rather than hardcoded value of 11

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Holden Karau wrote:
From: Holden Karau <[email protected]> http://www.holdenkarau.com

I have made a small patch for the zd1211rw driver which uses the
boundry channels of the regulatory domain, rather than the hard coded
values of 1 & 11.
Signed-off-by: Holden Karau <[email protected]> http://www.holdenkarau.com

Thanks for the patch! Please always look up the MAINTAINERS entry for the code you are modifying and CC the developers on patches.

Comments below, all minor points.

I'm not entirely sure how useful this patch is, but it seems like a
good idea. If its totally misguided, let me know :-) In case the patch
gets mangled I've put it up at
http://www.holdenkarau.com/~holden/projects/zd1211rw/zd1211rw-use-geo-for-channels.patch

Your mailer ate tabs and wrapped long lines. You're going to need to fix that.

--- a/drivers/net/wireless/zd1211rw/zd_chip.c    2006-10-23
10:07:39.000000000 -0400
+++ b/drivers/net/wireless/zd1211rw/zd_chip.c    2006-10-23
10:41:51.000000000 -0400
@@ -38,6 +38,8 @@ void zd_chip_init(struct zd_chip *chip,
    mutex_init(&chip->mutex);
    zd_usb_init(&chip->usb, netdev, intf);
    zd_rf_init(&chip->rf);
+    /* The chip needs to know which geo it is in */
+ chip->geo = ieee80211_get_geo(zd_mac_to_ieee80211(zd_netdev_mac(netdev)));

There is no need to store a geo reference here. You can use zd_chip_to_mac() to go from chip to mac, then mac-to-ieee80211 is easy.

}

void zd_chip_clear(struct zd_chip *chip)
@@ -606,14 +608,17 @@ static int patch_6m_band_edge(struct zd_
        { CR128, 0x14 }, { CR129, 0x12 }, { CR130, 0x10 },
        { CR47,  0x1e },
    };
+    struct ieee80211_geo *geo = chip->geo;

    if (!chip->patch_6m_band_edge || !chip->rf.patch_6m_band_edge)
        return 0;

-    /* FIXME: Channel 11 is not the edge for all regulatory domains. */
-    if (channel == 1 || channel == 11)
+    /* Checks the channel boundry of the region */
+    dev_dbg_f("checking boundry == %d || %d\n" , 1 , geo->bg_channels);
+    if (channel == 1 || channel == geo->bg_channels)

Typo, you mean boundary. Also, I think the debug message can go once you're confident it's working correctly.

        ioreqs[0].value = 0x12;

+

This added line could go as well.

    dev_dbg_f(zd_chip_dev(chip), "patching for channel %d\n", channel);
    return zd_iowrite16a_locked(chip, ioreqs, ARRAY_SIZE(ioreqs));
}

I think that after the above changes, your modifications to zd_chip.h can be removed.

--- a/drivers/net/wireless/zd1211rw/zd_chip.h    2006-10-23
10:07:39.000000000 -0400
+++ b/drivers/net/wireless/zd1211rw/zd_chip.h    2006-10-23
10:39:08.000000000 -0400
@@ -21,6 +21,8 @@
#include "zd_types.h"
#include "zd_rf.h"
#include "zd_usb.h"
+#include "zd_ieee80211.h"
+#include <linux/wireless.h>

/* Header for the Media Access Controller (MAC) and the Baseband Processor
 * (BBP). It appears that the ZD1211 wraps the old ZD1205 with USB glue and
@@ -669,6 +671,7 @@ struct zd_chip {
    /* SetPointOFDM in the vendor driver */
    u8 ofdm_cal_values[3][E2P_CHANNEL_COUNT];
    u16 link_led;
+      struct ieee80211_geo* geo;
    unsigned int pa_type:4,
        patch_cck_gain:1, patch_cr157:1, patch_6m_band_edge:1,
        new_phy_layout:1,
-
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