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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 317ac973-5b56-403a-0788-08d63807a3f6 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Oct 2018 10:17:58.3948 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5216 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, > -----Original Message----- > From: Boris Brezillon [mailto:boris.brezillon@bootlin.com] > Sent: Monday, October 22, 2018 3:41 PM > To: Yogesh Narayan Gaur > Cc: Tudor Ambarus ; richard@nod.at; Mark > Brown ; linux-kernel@vger.kernel.org; > nicolas.ferre@microchip.com; marek.vasut@gmail.com; > cyrille.pitchen@microchip.com; linux-mtd@lists.infradead.org; > Cristian.Birsan@microchip.com; Cyrille Pitchen ; > computersforpeace@gmail.com; dwmw2@infradead.org; linux-arm- > kernel@lists.infradead.org > Subject: Re: [PATCH v3 1/2] mtd: spi-nor: add support to non-uniform SFDP= SPI > NOR flash memories >=20 > On Mon, 22 Oct 2018 10:03:55 +0000 > Yogesh Narayan Gaur wrote: >=20 > > Hi, > > > > > > > -----Original Message----- > > > From: Boris Brezillon [mailto:boris.brezillon@bootlin.com] > > > Sent: Monday, October 22, 2018 2:46 PM > > > To: Yogesh Narayan Gaur > > > Cc: Tudor Ambarus ; richard@nod.at; > > > Mark Brown ; linux-kernel@vger.kernel.org; > > > nicolas.ferre@microchip.com; marek.vasut@gmail.com; > > > cyrille.pitchen@microchip.com; linux-mtd@lists.infradead.org; > > > Cristian.Birsan@microchip.com; Cyrille Pitchen > > > ; computersforpeace@gmail.com; > > > dwmw2@infradead.org; linux-arm- kernel@lists.infradead.org > > > Subject: Re: [PATCH v3 1/2] mtd: spi-nor: add support to non-uniform > > > SFDP SPI NOR flash memories > > > > > > On Mon, 22 Oct 2018 06:04:13 +0000 > > > Yogesh Narayan Gaur wrote: > > > > > > > > With below patch, it gets stuck in for loop of "+ for (nmaps =3D = 0; i< smpt_len; > nmaps++) {". > > > > [ 1.624684] m25p80 spi0.0: found s25fl512s, expected m25p80 > > [ 1.630377] Start [addr_width:00000000, read_dumy:08, > read_opcode:00000000] > > [ 1.637335] spi_nor_get_map_in_use:2882 smpt[0]=3D08ff65fc > > [ 1.642641] spi_nor_get_map_in_use:2882 smpt[1]=3D00000004 > > [ 1.647945] spi_nor_get_map_in_use:2882 smpt[2]=3D04ff65fc > > [ 1.653248] spi_nor_get_map_in_use:2882 smpt[3]=3D00000002 > > [ 1.658551] spi_nor_get_map_in_use:2882 smpt[4]=3D02ff65fd > > [ 1.663855] spi_nor_get_map_in_use:2882 smpt[5]=3D00000004 > > [ 1.669158] spi_nor_get_map_in_use:2882 smpt[6]=3Dff0201fe > > [ 1.674461] spi_nor_get_map_in_use:2882 smpt[7]=3D00007ff1 > > [ 1.679766] spi_nor_get_map_in_use:2882 smpt[8]=3D00037ff4 > > [ 1.685070] spi_nor_get_map_in_use:2882 smpt[9]=3D03fbfff4 > > [ 1.690375] spi_nor_get_map_in_use:2882 smpt[10]=3Dff0203fe > > [ 1.695768] spi_nor_get_map_in_use:2882 smpt[11]=3D03fbfff4 > > [ 1.701158] spi_nor_get_map_in_use:2882 smpt[12]=3D00037ff4 > > [ 1.706550] spi_nor_get_map_in_use:2882 smpt[13]=3D00007ff1 > > [ 1.711940] spi_nor_get_map_in_use:2882 smpt[14]=3Dff0005ff > > [ 1.717330] spi_nor_get_map_in_use:2882 smpt[15]=3D03fffff4 > > [ 1.722720] smpt[0]=3D[addr_width:00000000, read_dumy:08, > read_opcode:00000065] > > [ 1.729861] spi_nor_get_map_in_use:2912 map_id=3D1 > > > > > > --- a/drivers/mtd/spi-nor/spi-nor.c > > +++ b/drivers/mtd/spi-nor/spi-nor.c > > @@ -2863,26 +2863,36 @@ static u8 spi_nor_smpt_read_dummy(const struct > spi_nor *nor, const u32 settings) > > * @nor: pointer to a 'struct spi_nor' > > * @smpt: pointer to the sector map parameter table > > */ > > -static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const > > u32 *smpt) > > +static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const > > +u32 *smpt, u32 smpt_len) > > { > > const u32 *ret =3D NULL; > > - u32 i, addr; > > + u32 i, addr, nmaps; > > int err; > > u8 addr_width, read_opcode, read_dummy; > > u8 read_data_mask, data_byte, map_id; > > + bool map_id_is_valid =3D false; > > > > addr_width =3D nor->addr_width; > > read_dummy =3D nor->read_dummy; > > read_opcode =3D nor->read_opcode; > > > > + pr_info("Start [addr_width:%08x, read_dumy:%0x8, > > + read_opcode:%08x]\n", nor->addr_width, nor->read_dummy, > > + nor->read_opcode); > > + > > + for (i =3D 0; i > + pr_info("%s:%i smpt[%d]=3D%08x\n", __func__, __LINE__, > > + i, smpt[i]); > > + > > map_id =3D 0; > > - i =3D 0; > > /* Determine if there are any optional Detection Command Descri= ptors */ > > - while (!(smpt[i] & SMPT_DESC_TYPE_MAP)) { > > + for (i =3D 0; i< smpt_len; i++) { > > + if ((smpt[i] & SMPT_DESC_TYPE_MAP)) > > + break; > > + > > read_data_mask =3D SMPT_CMD_READ_DATA(smpt[i]); > > nor->addr_width =3D spi_nor_smpt_addr_width(nor, smpt[i= ]); > > nor->read_dummy =3D spi_nor_smpt_read_dummy(nor, smpt[i= ]); > > nor->read_opcode =3D SMPT_CMD_OPCODE(smpt[i]); > > + pr_info("smpt[%d]=3D[addr_width:%08x, read_dumy:%0x8, > > + read_opcode:%08x]\n", i, nor->addr_width, nor->read_dummy, > > + nor->read_opcode); > > + > > addr =3D smpt[i + 1]; > > > > err =3D spi_nor_read_raw(nor, addr, 1, &data_byte); @@ > > -2894,18 +2904,36 @@ static const u32 *spi_nor_get_map_in_use(struct > spi_nor *nor, const u32 *smpt) > > * Configuration that is currently in use. > > */ > > map_id =3D map_id << 1 | !!(data_byte & read_data_mask)= ; > > + map_id_is_valid =3D true; > > i =3D i + 2; > > } > > > > - /* Find the matching configuration map */ > > - while (SMPT_MAP_ID(smpt[i]) !=3D map_id) { > > - if (smpt[i] & SMPT_DESC_END) > > - goto out; > > + if (map_id_is_valid) > > + pr_info("%s:%i map_id=3D%d\n", __func__, __LINE__, map_= id); > > + else > > + pr_info("%s:%i NO map_id\n", __func__, __LINE__); > > + > > + for (nmaps =3D 0; i< smpt_len; nmaps++) { > > + if((smpt[i] & SMPT_DESC_TYPE_MAP)) > > + continue; >=20 > Try to Replace the above if block by: >=20 > if (!(smpt[i] & SMPT_DESC_TYPE_MAP)) { > i +=3D 2; > continue; > } >=20 It works, [ 1.628162] m25p80 spi0.0: found s25fl512s, expected m25p80 = =20 [ 1.633854] Start [addr_width:00000000, read_dumy:08, read_opcode:000000= 00] =20 [ 1.640811] spi_nor_get_map_in_use:2882 smpt[0]=3D08ff65fc = =20 [ 1.646117] spi_nor_get_map_in_use:2882 smpt[1]=3D00000004 = =20 [ 1.651421] spi_nor_get_map_in_use:2882 smpt[2]=3D04ff65fc = =20 [ 1.656724] spi_nor_get_map_in_use:2882 smpt[3]=3D00000002 = =20 [ 1.662028] spi_nor_get_map_in_use:2882 smpt[4]=3D02ff65fd = =20 [ 1.667331] spi_nor_get_map_in_use:2882 smpt[5]=3D00000004 = =20 [ 1.672635] spi_nor_get_map_in_use:2882 smpt[6]=3Dff0201fe = =20 [ 1.677937] spi_nor_get_map_in_use:2882 smpt[7]=3D00007ff1 = =20 [ 1.683240] spi_nor_get_map_in_use:2882 smpt[8]=3D00037ff4 = =20 [ 1.688542] spi_nor_get_map_in_use:2882 smpt[9]=3D03fbfff4 = =20 [ 1.693845] spi_nor_get_map_in_use:2882 smpt[10]=3Dff0203fe = =20 [ 1.699234] spi_nor_get_map_in_use:2882 smpt[11]=3D03fbfff4 = =20 [ 1.704625] spi_nor_get_map_in_use:2882 smpt[12]=3D00037ff4 = =20 [ 1.710014] spi_nor_get_map_in_use:2882 smpt[13]=3D00007ff1 = =20 [ 1.715403] spi_nor_get_map_in_use:2882 smpt[14]=3Dff0005ff = =20 [ 1.720791] spi_nor_get_map_in_use:2882 smpt[15]=3D03fffff4 = =20 [ 1.726180] smpt[0]=3D[addr_width:00000000, read_dumy:08, read_opcode:00= 000065] =20 [ 1.733320] spi_nor_get_map_in_use:2912 map_id=3D0 smpt_len:16 i=3D:3 = =20 [ 1.739406] End [addr_width:00000000, read_dumy:08, read_opcode:00000065= ] =20 [ 1.746204] m25p80 spi0.0: s25fl512s (65536 Kbytes) = =20 - /* Find the matching configuration map */ - while (SMPT_MAP_ID(smpt[i]) !=3D map_id) { - if (smpt[i] & SMPT_DESC_END) - goto out; + if (map_id_is_valid) + pr_info("%s:%i map_id=3D%d smpt_len:%d i=3D:%d\n", __func__= , __LINE__, map_id, smpt_len, i); + else + pr_info("%s:%i NO map_id\n", __func__, __LINE__); + + for (nmaps =3D 0; i< smpt_len; nmaps++) { + if(!(smpt[i] & SMPT_DESC_TYPE_MAP)) { + i +=3D 2; + continue; + } + + if(!map_id_is_valid) { + if (nmaps) { + ret =3D NULL; + break; + } + + ret =3D smpt+i; + } else if (map_id =3D=3D SMPT_MAP_ID(smpt[i])) { + ret =3D smpt+i; + break; + } + /* increment the table index to the next map */ i +=3D SMPT_MAP_REGION_COUNT(smpt[i]) + 1; } - ret =3D smpt + i; + pr_info("End [addr_width:%08x, read_dumy:%0x8, read_opcode:%08x]\n"= , nor->addr_width, nor->read_dummy, nor->read_opcode); > > + > > + if(!map_id_is_valid) { > > + if (nmaps) { > > + ret =3D NULL; > > + break; > > + } > > + > > + ret =3D smpt+i; > > + } else if (map_id =3D=3D SMPT_MAP_ID(smpt[i])) { > > + ret =3D smpt+i; > > + break; > > + } > > + > > /* increment the table index to the next map */ > > i +=3D SMPT_MAP_REGION_COUNT(smpt[i]) + 1; > > } > > > > - ret =3D smpt + i; > > + pr_info("End [addr_width:%08x, read_dumy:%0x8, > > + read_opcode:%08x]\n", nor->addr_width, nor->read_dummy, > > + nor->read_opcode); > > /* fall through */ > > out: > > nor->addr_width =3D addr_width;