On 04/19/2013 04:01 AM, Christoph Fritz wrote:
> On Thu, 2013-04-18 at 18:26 -0500, Jon Hunter wrote:
>> On 04/18/2013 06:24 PM, Jon Hunter wrote:
>
>>>> To get the values right for dt-GPMC-NAND-Config, here are the GPMC
>>>> config registers for chip-select 0, they are taken from u-boot
>>>> by doing "md 0x6E000060 7" on the u-boot shell:
>>>>
>>>> GPMC_CONFIG1: 0x6e000060: 0x00001800
>>>> GPMC_CONFIG2: 0x6e000064: 0x00141400
>>>> GPMC_CONFIG3: 0x6e000068: 0x00141400
>>>> GPMC_CONFIG4: 0x6e00006c: 0x0F010F01
>>>> GPMC_CONFIG5: 0x6e000070: 0x010C1414
>>>> GPMC_CONFIG6: 0x6e000074: 0x1F0F0A80
>>>> GPMC_CONFIG7: 0x6e000078: 0x00000870
>>
>>
>> I would advise you dump the gpmc registers at the end of the gpmc probe.
>> I am sure you will see something completely different to the above based
>> upon your dt configuration.
>
> Thanks to your help this is my new gpmc dt config:
>
> &gpmc {
> ranges = <0 0 0x30000000 0x1000000>;
> nand@0,0 {
> reg = <0 0 0x1000000>;
> nand-bus-width = <16>;
> ti,nand-ecc-opt = "hw";
> /* no elm on omap3 */
>
> gpmc,mux-add-data = <0>;
> gpmc,device-nand;
> gpmc,device-width = <2>;
> gpmc,wait-pin = <0>;
> gpmc,wait-monitoring-ns = <0x0>;
> gpmc,burst-length= <4>;
> gpmc,cs-on-ns = <0>;
> gpmc,cs-rd-off-ns = <0x14>;
> gpmc,cs-wr-off-ns = <0x14>;
> gpmc,adv-on-ns = <0>;
> gpmc,adv-rd-off-ns = <0x14>;
> gpmc,adv-wr-off-ns = <0x14>;
> gpmc,oe-on-ns = <0x1>;
> gpmc,oe-off-ns = <0xf>;
> gpmc,we-on-ns = <0x1>;
> gpmc,we-off-ns = <0xf>;
> gpmc,rd-cycle-ns = <0x14>;
> gpmc,wr-cycle-ns = <0x14>;
> gpmc,access-ns = <0xc>;
> gpmc,page-burst-access-ns = <0x1>;
> gpmc,bus-turnaround-ns = <0x0>;
> gpmc,cycle2cycle-samecsen = <0x1>;
> gpmc,cycle2cycle-delay-ns = <0xa>;
> gpmc,wr-data-mux-bus-ns = <0xf>;
> gpmc,wr-access-ns = <0x1f>;
Please note that the above timings are in ns and the registers settings
are in gpmc_fclk ticks. So you need to convert to ns.
> };
> };
>
> As suggested I added some printks to kernel gpmc-subsystem to compare
> the gpmc config registers.
>
> [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
> [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
> [ 0.000000] Machine: Generic OMAP3 (Flattened Device Tree), model: INCOstartec LILLY-DBB056 (DM3730)
> [ 0.000000] Memory policy: ECC disabled, Data cache writeback
> [ 0.000000] CPU: All CPU(s) started in SVC mode.
> [ 0.000000] OMAP3630 ES1.2 (l2cache iva neon isp 192mhz_clk )
> [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32256
> [ 0.000000] Kernel command line: console=ttyO0,115200n8 vt.global_cursor_default=0 consoleblank=0 root=/dev/nfs ip=dhcp
> [ 0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
> [ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
> [ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
> [ 0.000000] Memory: 127MB = 127MB total
> [ 0.000000] Memory: 116040k/116040k available, 15032k reserved, 0K highmem
> [ 0.000000] Virtual kernel memory layout:
> [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
> [ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
> [ 0.000000] vmalloc : 0xc8800000 - 0xff000000 ( 872 MB)
> [ 0.000000] lowmem : 0xc0000000 - 0xc8000000 ( 128 MB)
> [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
> [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
> [ 0.000000] .text : 0xc0008000 - 0xc06a9fa8 (6792 kB)
> [ 0.000000] .init : 0xc06aa000 - 0xc06db9ec ( 199 kB)
> [ 0.000000] .data : 0xc06dc000 - 0xc073bd20 ( 384 kB)
> [ 0.000000] .bss : 0xc073bd20 - 0xc0c7e414 (5386 kB)
> [ 0.000000] NR_IRQS:16 nr_irqs:16 16
> [ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96 interrupts
> [ 0.000000] Total of 96 interrupts on 1 active controller
> [ 0.000000] Clocking rate (Crystal/Core/MPU): 26.0/400/600 MHz
> [ 0.000000] OMAP clockevent source: timer1 at 32768 Hz
> [ 0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every 131071999ms
> [ 0.000000] OMAP clocksource: 32k_counter at 32768 Hz
> [ 0.000000] Console: colour dummy device 80x30
> [ 0.000000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
> [ 0.000000] ... MAX_LOCKDEP_SUBCLASSES: 8
> [ 0.000000] ... MAX_LOCK_DEPTH: 48
> [ 0.000000] ... MAX_LOCKDEP_KEYS: 8191
> [ 0.000000] ... CLASSHASH_SIZE: 4096
> [ 0.000000] ... MAX_LOCKDEP_ENTRIES: 16384
> [ 0.000000] ... MAX_LOCKDEP_CHAINS: 32768
> [ 0.000000] ... CHAINHASH_SIZE: 16384
> [ 0.000000] memory used by lock dependency info: 3695 kB
> [ 0.000000] per task-struct memory footprint: 1152 bytes
> [ 0.001037] Calibrating delay loop... 398.13 BogoMIPS (lpj=1990656)
> [ 0.119659] pid_max: default: 4096 minimum: 301
> [ 0.119964] Security Framework initialized
> [ 0.120086] Mount-cache hash table entries: 512
> [ 0.135314] CPU: Testing write buffer coherency: ok
> [ 0.136810] Setting up static identity map for 0xc04efee8 - 0xc04eff40
> [ 0.141418] devtmpfs: initialized
> [ 0.197814] pinctrl core: initialized pinctrl subsystem
> [ 0.201232] regulator-dummy: no parameters
> [ 0.202972] NET: Registered protocol family 16
> [ 0.203704] DMA: preallocated 256 KiB pool for atomic coherent allocations
> [ 0.211700] Reprogramming SDRC clock to 400000000 Hz
> [ 0.229248] pinctrl-single 48002030.pinmux: 742 pins at pa fa002030 size 1484
> [ 0.231140] pinctrl-single 48002a00.pinmux: 46 pins at pa fa002a00 size 92
> [ 0.234588] OMAP GPIO hardware version 2.5
> [ 0.252685] platform 49022000.mcbsp: alias fck already exists
> [ 0.253540] platform 49024000.mcbsp: alias fck already exists
> [ 0.261749] omap-gpmc 6e000000.gpmc: GPMC revision 5.0
> [ 0.262084] gpmc_write_reg(), 176,
> [ 0.262115] gpmc_ch_dump_reg, 1836, GPMC_CS_CONFIG1 0x00001800
> [ 0.262115] gpmc_ch_dump_reg, 1838, GPMC_CS_CONFIG2 0x00141400
> [ 0.262145] gpmc_ch_dump_reg, 1840, GPMC_CS_CONFIG3 0x00141400
> [ 0.262145] gpmc_ch_dump_reg, 1842, GPMC_CS_CONFIG4 0x0f010f01
> [ 0.262176] gpmc_ch_dump_reg, 1844, GPMC_CS_CONFIG5 0x010c1414
> [ 0.262176] gpmc_ch_dump_reg, 1846, GPMC_CS_CONFIG6 0x1f0f0a80
> [ 0.262207] gpmc_ch_dump_reg, 1848, GPMC_CS_CONFIG7 0x00000870
> [ 0.262207] gpmc_write_reg(), 176,
> [ 0.262237] gpmc_ch_dump_reg, 1836, GPMC_CS_CONFIG1 0x00001800
> [ 0.262237] gpmc_ch_dump_reg, 1838, GPMC_CS_CONFIG2 0x00141400
> [ 0.262237] gpmc_ch_dump_reg, 1840, GPMC_CS_CONFIG3 0x00141400
> [ 0.262268] gpmc_ch_dump_reg, 1842, GPMC_CS_CONFIG4 0x0f010f01
> [ 0.262268] gpmc_ch_dump_reg, 1844, GPMC_CS_CONFIG5 0x010c1414
> [ 0.262298] gpmc_ch_dump_reg, 1846, GPMC_CS_CONFIG6 0x1f0f0a80
> [ 0.262298] gpmc_ch_dump_reg, 1848, GPMC_CS_CONFIG7 0x00000870
> [ 0.262695] gpmc_cs_enable_mem(), 433,
> [ 0.262725] gpmc_ch_dump_reg, 1836, GPMC_CS_CONFIG1 0x00001800
> [ 0.262756] gpmc_ch_dump_reg, 1838, GPMC_CS_CONFIG2 0x00141400
> [ 0.262756] gpmc_ch_dump_reg, 1840, GPMC_CS_CONFIG3 0x00141400
> [ 0.262786] gpmc_ch_dump_reg, 1842, GPMC_CS_CONFIG4 0x0f010f01
> [ 0.262786] gpmc_ch_dump_reg, 1844, GPMC_CS_CONFIG5 0x010c1414
> [ 0.262817] gpmc_ch_dump_reg, 1846, GPMC_CS_CONFIG6 0x1f0f0a80
> [ 0.262817] gpmc_ch_dump_reg, 1848, GPMC_CS_CONFIG7 0x00000f70
> [ 0.262878] GPMC CS0: cs_on : 0 ticks, 0 ns (was 0 ticks) 0 ns
> [ 0.262908] GPMC CS0: cs_rd_off : 4 ticks, 20 ns (was 20 ticks) 20 ns
> [ 0.262939] GPMC CS0: cs_wr_off : 4 ticks, 20 ns (was 20 ticks) 20 ns
> [ 0.262939] GPMC CS0: adv_on : 0 ticks, 0 ns (was 0 ticks) 0 ns
> [ 0.262969] GPMC CS0: adv_rd_off: 4 ticks, 20 ns (was 20 ticks) 20 ns
> [ 0.263000] GPMC CS0: adv_wr_off: 4 ticks, 20 ns (was 20 ticks) 20 ns
> [ 0.263031] GPMC CS0: oe_on : 0 ticks, 0 ns (was 1 ticks) 0 ns
> [ 0.263031] GPMC CS0: oe_off : 3 ticks, 15 ns (was 15 ticks) 15 ns
> [ 0.263061] GPMC CS0: we_on : 0 ticks, 0 ns (was 1 ticks) 0 ns
> [ 0.263092] GPMC CS0: we_off : 3 ticks, 15 ns (was 15 ticks) 15 ns
> [ 0.263122] GPMC CS0: rd_cycle : 4 ticks, 20 ns (was 20 ticks) 20 ns
> [ 0.263153] GPMC CS0: wr_cycle : 4 ticks, 20 ns (was 20 ticks) 20 ns
> [ 0.263183] GPMC CS0: access : 3 ticks, 15 ns (was 12 ticks) 12 ns
> [ 0.263183] GPMC CS0: page_burst_access: 0 ticks, 0 ns (was 1 ticks) 0 ns
> [ 0.263214] GPMC CS0: bus_turnaround: 0 ticks, 0 ns (was 0 ticks) 0 ns
> [ 0.263244] GPMC CS0: cycle2cycle_delay: 0 ticks, 0 ns (was 10 ticks) 0 ns
> [ 0.263244] GPMC CS0: wait_monitoring: 0 ticks, 0 ns (was 0 ticks) 0 ns
> [ 0.263275] GPMC CS0: clk_activation: 0 ticks, 0 ns (was 0 ticks) 0 ns
> [ 0.263305] GPMC CS0: wr_data_mux_bus: 3 ticks, 15 ns (was 15 ticks) 15 ns
> [ 0.263336] GPMC CS0: wr_access : 7 ticks, 35 ns (was 31 ticks) 31 ns
I think you need to convert the register settings to ns and put those
values in the dts file.
Cheers
Jon
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
