From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from web20725.mail.yahoo.com ([216.136.226.107]) by pentafluge.infradead.org with smtp (Exim 4.30 #5 (Red Hat Linux)) id 1Algfx-00019o-Km for linux-mtd@lists.infradead.org; Wed, 28 Jan 2004 03:47:37 +0000 Message-ID: <20040128034734.77883.qmail@web20725.mail.yahoo.com> Date: Tue, 27 Jan 2004 19:47:34 -0800 (PST) From: Shawn Jin To: linux-mtd@lists.infradead.org MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="0-636223974-1075261654=:74496" Subject: 64 bit bus access on a customed MPC8245 board List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --0-636223974-1075261654=:74496 Content-Type: text/plain; charset=us-ascii Content-Id: Content-Disposition: inline Hi, I'm working on a customed MPC8245 board with flash chip Am29LV320 and trying to enable MTD driver support. The configuration is 32 bit bus width in each chip with 2 chips interleaved. So CONFIG_MTD_CFI_B8 and CONFIG_MTD_CFI_I2 are defined. MPC8245 requires the following memory mapping: bank 0: 0xFF800000 - 0xFFFFFFFF bank 1: 0xFF000000 - 0xFF7FFFFF I noticed that FPU must be enabled for 64-bit read/write from/to flash. I use read64() and write64() functions in the attachment, which are copied from sbc8240.c. However no chip can be found. Any suggestions? Thank you very much. The message is shown below. mpc8245:Probing 0x00800000 at 0xff800000 mpc8245_write64 adr 0xff800000 data 0x000000f0000000f0 mpc8245_write64 adr 0xff8002a8 data 0x0000009800000098 mpc8245_read64 ofs 0xff800080 result 0xffffffffffffffff CFI: Found no mpc8245 Flash Bank #0 device at location zero mpc8245:Probing 0x00800000 at 0xff000000 mpc8245_write64 adr 0xff000000 data 0x000000f0000000f0 mpc8245_write64 adr 0xff0002a8 data 0x0000009800000098 mpc8245_read64 ofs 0xff000080 result 0xffffffffffffffff CFI: Found no MPC8245 Flash Bank #1 device at location zero mpc8245:No suppported flash chips found! -Shawn. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ --0-636223974-1075261654=:74496 Content-Type: application/octet-stream; name="flash.c" Content-Transfer-Encoding: base64 Content-Description: flash.c Content-Disposition: attachment; filename="flash.c" X191NjQgbXBjODI0NV9yZWFkNjQoc3RydWN0IG1hcF9pbmZvICptYXAsIHVu c2lnbmVkIGxvbmcgb2ZzKQp7Cgl1bnNpZ25lZCBsb25nIGZsYWdzLCBtc3Is IHNhdmVkX21zcjsKCXZvbGF0aWxlIHVuc2lnbmVkIGxvbmcgKnA7CgoJc2F2 ZV9mbGFncyhmbGFncyk7CgljbGkoKTsKCgkvKiB0dXJuIG9mZiBmbG9hdGlu ZyBwb2ludCB1bmF2YWlsYWJsZSBleGNlcHRpb25zICovCgoJX19hc21fXyBf X3ZvbGF0aWxlX18gKAoJCSJtZm1zciAlMCIgCgkJOiAiPXIiIChtc3IpIDop OwoKCXNhdmVkX21zciA9IG1zcjsKCW1zciB8PSBNU1JfRlA7Cgltc3IgJj0g fihNU1JfRkUwIHwgTVNSX0ZFMSk7CgoJX19hc21fXyBfX3ZvbGF0aWxlX18g KAoJCSJtdG1zciAlMFxuIgoJCSJpc3luY1xuIgoJCTogOiAiciIgKG1zcikp OwoKCS8qIHJlYWQgdGhlIGRhdGEgdmlhIGEgZmxvYXRpbmcgcG9pbnQgcmVn aXN0ZXIgKi8KCglvZnMgPSBtYXAtPm1hcF9wcml2XzEgKyBvZnM7CglwID0g KHVuc2lnbmVkIGxvbmcgKikgJnJlc3VsdDY0OwoKCV9fYXNtX18gX192b2xh dGlsZV9fICgKCQkibGZkICAxLDAoJTEpXG4iCgkJInN0ZmQgMSwwKCUwKVxu IgoJCTogOiAiciIgKHApLCAiciIgKG9mcykKCQkpOwoKCS8qIHJlc3RvcmUg c3RhdGUgKi8KCglfX2FzbV9fIF9fdm9sYXRpbGVfXyAoCgkJIm10bXNyICUw XG4iCgkJImlzeW5jXG4iCgkJOiA6ICJyIiAoc2F2ZWRfbXNyKSk7CgoJcmVz dG9yZV9mbGFncyhmbGFncyk7CgoJcCA9ICh1bnNpZ25lZCBsb25nICopICZy ZXN1bHQ2NDsKCWRlYnVnaygibXBjODI0NV9yZWFkNjQgb2ZzIDB4JXggcmVz dWx0IDB4JTA4eCUwOHhcbiIsIG9mcywgKnAsICoocCsxKSk7CgoJcmV0dXJu IHJlc3VsdDY0Owp9Cg0Kdm9pZCBtcGM4MjQ1X3dyaXRlNjQoc3RydWN0IG1h cF9pbmZvICptYXAsIF9fdTY0IGQsIHVuc2lnbmVkIGxvbmcgYWRyKQp7Cgl1 bnNpZ25lZCBsb25nIGxvbmcgdG1wOwoJdW5zaWduZWQgbG9uZyBmbGFncywg bXNyLCBzYXZlZF9tc3IsICpwOwoJdm9sYXRpbGUgbG9uZyBzYXZlZF9mclsy XTsKCglzYXZlX2ZsYWdzKGZsYWdzKTsKCWNsaSgpOwoKCS8qIHR1cm4gb2Zm IGZsb2F0aW5nIHBvaW50IHVuYXZhaWxhYmxlIGV4Y2VwdGlvbnMgKi8KCglf X2FzbV9fIF9fdm9sYXRpbGVfXyAoCgkJIm1mbXNyICUwIiAKCQk6ICI9ciIg KG1zcikgOik7CgoJc2F2ZWRfbXNyID0gbXNyOwoJbXNyIHw9IE1TUl9GUDsK CW1zciAmPSB+KE1TUl9GRTAgfCBNU1JfRkUxKTsKCglfX2FzbV9fIF9fdm9s YXRpbGVfXyAoCgkJIm10bXNyICUwXG4iCgkJImlzeW5jXG4iCgkJOiA6ICJy IiAobXNyKSk7CgoKCS8qIHdyaXRlIHRoZSBkYXRhIHZpYSBhIGZsb2F0aW5n IHBvaW50IHJlZ2lzdGVyICovCgoJdG1wID0gZDsKCXAgPSAodW5zaWduZWQg bG9uZyAqKSAmdG1wOwoJYWRyID0gbWFwLT5tYXBfcHJpdl8xICsgYWRyOwoJ ZGVidWdrKCJtcGM4MjQ1X3dyaXRlNjQgYWRyIDB4JXggZGF0YSAweCUwOHgl MDh4XG4iLCBhZHIsICpwLCAqKHArMSkpOwoKCV9fYXNtX18gX192b2xhdGls ZV9fICgKCQkic3RmZCAxLDAoJTIpXG4iCgkJImxmZCAgMSwwKCUwKVxuIgoJ CSJzdGZkIDEsMCglMSlcbiIKCQkibGZkICAxLDAoJTIpXG4iCgkJOiA6ICJy IiAocCksICJyIiAoYWRyKSwgImIiIChzYXZlZF9mcikKCQkpOwoKCS8qIHJl c3RvcmUgc3RhdGUgKi8KCglfX2FzbV9fIF9fdm9sYXRpbGVfXyAoCgkJIm10 bXNyICUwXG4iCgkJImlzeW5jXG4iCgkJOiA6ICJyIiAoc2F2ZWRfbXNyKSk7 CgoJcmVzdG9yZV9mbGFncyhmbGFncyk7Cn0K --0-636223974-1075261654=:74496--