Blame view
doc/README.omap3
4.41 KB
f904cdbb6 OMAP3: Add common... |
1 2 3 4 5 6 7 8 9 10 11 12 |
Summary ======= This README is about U-Boot support for TI's ARM Cortex-A8 based OMAP3 [1] family of SoCs. TI's OMAP3 SoC family contains an ARM Cortex-A8. Additionally, some family members contain a TMS320C64x+ DSP and/or an Imagination SGX 2D/3D graphics processor and various other standard peripherals. Currently the following boards are supported: * OMAP3530 BeagleBoard [2] |
9d0fc8110 OMAP3: Add Overo ... |
13 |
* Gumstix Overo [3] |
ad9bc8e52 OMAP3: Add EVM board |
14 |
* TI EVM [4] |
2be2c6cc6 OMAP3: Add Pandor... |
15 |
* OpenPandora Ltd. Pandora [5] |
7379f45a7 OMAP3: Add Zoom1 ... |
16 |
* TI/Logic PD Zoom MDK [6] |
376aee78d ZOOM2 Add initial... |
17 |
* TI/Logic PD Zoom 2 [7] |
36b4e2ddd OMAP3: add CM-T35... |
18 |
* CompuLab Ltd. CM-T35 [8] |
f904cdbb6 OMAP3: Add common... |
19 20 21 22 23 24 25 |
Build ===== * BeagleBoard: make omap3_beagle_config make |
9d0fc8110 OMAP3: Add Overo ... |
26 27 28 29 |
* Gumstix Overo: make omap3_overo_config make |
ad9bc8e52 OMAP3: Add EVM board |
30 31 32 33 |
* TI EVM: make omap3_evm_config make |
2be2c6cc6 OMAP3: Add Pandor... |
34 35 36 37 |
* Pandora: make omap3_pandora_config make |
7379f45a7 OMAP3: Add Zoom1 ... |
38 39 40 41 |
* Zoom MDK: make omap3_zoom1_config make |
376aee78d ZOOM2 Add initial... |
42 43 44 45 |
* Zoom 2: make omap3_zoom2_config make |
36b4e2ddd OMAP3: add CM-T35... |
46 47 48 49 |
* CM-T35: make cm_t35_config make |
84d7a0171 OMAP3: mvblx: Ini... |
50 |
|
f904cdbb6 OMAP3: Add common... |
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 |
Custom commands =============== To make U-Boot for OMAP3 support NAND device SW or HW ECC calculation, U-Boot for OMAP3 supports custom user command nandecc hw/sw To be compatible with NAND drivers using SW ECC (e.g. kernel code) nandecc sw enables SW ECC calculation. HW ECC enabled with nandecc hw is typically used to write 2nd stage bootloader (known as 'x-loader') which is executed by OMAP3's boot rom and therefore has to be written with HW ECC. For all other commands see help |
0c872ecd0 OMAP3 Port kernel... |
73 74 75 76 |
Interfaces ========== gpio |
4c4bb19d0 omap3: Add interf... |
77 |
---- |
0c872ecd0 OMAP3 Port kernel... |
78 79 |
To set a bit : |
3b690ebbb omap: gpio: gener... |
80 81 82 |
if (!gpio_request(N, "")) { gpio_direction_output(N, 0); gpio_set_value(N, 1); |
0c872ecd0 OMAP3 Port kernel... |
83 84 85 |
} To clear a bit : |
3b690ebbb omap: gpio: gener... |
86 87 88 |
if (!gpio_request(N, "")) { gpio_direction_output(N, 0); gpio_set_value(N, 0); |
0c872ecd0 OMAP3 Port kernel... |
89 90 91 |
} To read a bit : |
3b690ebbb omap: gpio: gener... |
92 93 94 95 |
if (!gpio_request(N, "")) { gpio_direction_input(N); val = gpio_get_value(N); gpio_free(N); |
0c872ecd0 OMAP3 Port kernel... |
96 97 98 99 100 101 102 |
} if (val) printf("GPIO N is set "); else printf("GPIO N is clear "); |
4c4bb19d0 omap3: Add interf... |
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 |
dma --- void omap3_dma_init(void) Init the DMA module int omap3_dma_get_conf_chan(uint32_t chan, struct dma4_chan *config); Read config of the channel int omap3_dma_conf_chan(uint32_t chan, struct dma4_chan *config); Write config to the channel int omap3_dma_conf_transfer(uint32_t chan, uint32_t *src, uint32_t *dst, uint32_t sze) Config source, destination and size of a transfer int omap3_dma_wait_for_transfer(uint32_t chan) Wait for a transfer to end - this hast to be called before a channel or the data the channel transferd are used. int omap3_dma_get_revision(uint32_t *minor, uint32_t *major) Read silicon Revision of the DMA module |
4a0930069 omap_gpmc: add su... |
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 |
NAND ==== There are some OMAP3 devices out there with NAND attached. Due to the fact that OMAP3 ROM code can only handle 1-bit hamming ECC for accessing first page (place where SPL lives) we require this setup for u-boot at least when reading the second progam within SPL. A lot of newer NAND chips however require more than 1-bit ECC for the pages, some can live with 1-bit for the first page. To handle this we can switch to another ECC algorithm after reading the payload within SPL. BCH8 ---- To enable hardware assisted BCH8 (8-bit BCH [Bose, Chaudhuri, Hocquenghem]) on OMAP3 devices we can use the BCH library in lib/bch.c. To do so add CONFIG_BCH |
3f719069c mtd: nand: omap: ... |
135 |
and set CONFIG_NAND_OMAP_ECCSCHEME=5 (refer README.nand) for selecting BCH8_SW. |
4a0930069 omap_gpmc: add su... |
136 137 138 139 140 141 142 143 144 145 |
The NAND OOB layout is the same as in linux kernel, if the linux kernel BCH8 implementation for OMAP3 works for you so the u-boot version should also. When you require the SPL to read with BCH8 there are two more configs to change: * CONFIG_SYS_NAND_ECCPOS (must be the same as .eccpos in GPMC_NAND_HW_BCH8_ECC_LAYOUT defined in arch/arm/include/asm/arch-omap3/omap_gpmc.h) * CONFIG_SYS_NAND_ECCSIZE must be 512 * CONFIG_SYS_NAND_ECCBYTES must be 13 for this BCH8 setup |
0c872ecd0 OMAP3 Port kernel... |
146 |
|
f904cdbb6 OMAP3: Add common... |
147 148 |
Acknowledgements ================ |
36b4e2ddd OMAP3: add CM-T35... |
149 |
OMAP3 U-Boot is based on U-Boot tar ball [9] for BeagleBoard and EVM done by |
f904cdbb6 OMAP3: Add common... |
150 151 152 153 154 155 156 157 158 159 160 161 162 |
several TI employees. Links ===== [1] OMAP3: http://www.ti.com/omap3 (high volume) and http://www.ti.com/omap35x (broad market) [2] OMAP3530 BeagleBoard: http://beagleboard.org/ |
9d0fc8110 OMAP3: Add Overo ... |
163 164 165 |
[3] Gumstix Overo: http://www.gumstix.net/Overo/ |
ad9bc8e52 OMAP3: Add EVM board |
166 167 168 |
[4] TI EVM: http://focus.ti.com/docs/toolsw/folders/print/tmdxevm3503.html |
2be2c6cc6 OMAP3: Add Pandor... |
169 170 171 |
[5] OpenPandora Ltd. Pandora: http://openpandora.org/ |
7379f45a7 OMAP3: Add Zoom1 ... |
172 173 174 |
[6] TI/Logic PD Zoom MDK: http://www.logicpd.com/products/devkit/ti/zoom_mobile_development_kit |
376aee78d ZOOM2 Add initial... |
175 176 177 |
[7] TI/Logic PD Zoom 2 http://www.logicpd.com/sites/default/files/1012659A_Zoom_OMAP34x-II_MDP_Brief.pdf |
36b4e2ddd OMAP3: add CM-T35... |
178 179 180 181 182 183 |
[8] CompuLab Ltd. CM-T35: http://www.compulab.co.il/t3530/html/t3530-cm-datasheet.htm [9] TI OMAP3 U-Boot: |
f904cdbb6 OMAP3: Add common... |
184 185 |
http://beagleboard.googlecode.com/files/u-boot_beagle_revb.tar.gz |