5 This README is about U-Boot support for TI's ARM Cortex-A8 based OMAP3 [1]
6 family of SoCs. TI's OMAP3 SoC family contains an ARM Cortex-A8. Additionally,
7 some family members contain a TMS320C64x+ DSP and/or an Imagination SGX 2D/3D
8 graphics processor and various other standard peripherals.
10 Currently the following boards are supported:
12 * OMAP3530 BeagleBoard [2]
18 * OpenPandora Ltd. Pandora [5]
20 * TI/Logic PD Zoom MDK [6]
22 * TI/Logic PD Zoom 2 [7]
24 * CompuLab Ltd. CM-T35 [8]
29 While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile
30 with -march=armv5 to allow more compilers to work. For U-Boot code this has
31 no performance impact.
38 make omap3_beagle_config
43 make omap3_overo_config
53 make omap3_pandora_config
58 make omap3_zoom1_config
63 make omap3_zoom2_config
73 make omap3_mvblx_config
79 To make U-Boot for OMAP3 support NAND device SW or HW ECC calculation, U-Boot
80 for OMAP3 supports custom user command
84 To be compatible with NAND drivers using SW ECC (e.g. kernel code)
88 enables SW ECC calculation. HW ECC enabled with
92 is typically used to write 2nd stage bootloader (known as 'x-loader') which is
93 executed by OMAP3's boot rom and therefore has to be written with HW ECC.
95 For all other commands see
107 if (!gpio_request(N, "")) {
108 gpio_direction_output(N, 0);
109 gpio_set_value(N, 1);
114 if (!gpio_request(N, "")) {
115 gpio_direction_output(N, 0);
116 gpio_set_value(N, 0);
121 if (!gpio_request(N, "")) {
122 gpio_direction_input(N);
123 val = gpio_get_value(N);
127 printf("GPIO N is set\n");
129 printf("GPIO N is clear\n");
133 void omap3_dma_init(void)
135 int omap3_dma_get_conf_chan(uint32_t chan, struct dma4_chan *config);
136 Read config of the channel
137 int omap3_dma_conf_chan(uint32_t chan, struct dma4_chan *config);
138 Write config to the channel
139 int omap3_dma_conf_transfer(uint32_t chan, uint32_t *src, uint32_t *dst,
141 Config source, destination and size of a transfer
142 int omap3_dma_wait_for_transfer(uint32_t chan)
143 Wait for a transfer to end - this hast to be called before a channel
144 or the data the channel transferd are used.
145 int omap3_dma_get_revision(uint32_t *minor, uint32_t *major)
146 Read silicon Revision of the DMA module
152 OMAP3 U-Boot is based on U-Boot tar ball [9] for BeagleBoard and EVM done by
153 several TI employees.
160 http://www.ti.com/omap3 (high volume) and
161 http://www.ti.com/omap35x (broad market)
163 [2] OMAP3530 BeagleBoard:
165 http://beagleboard.org/
169 http://www.gumstix.net/Overo/
173 http://focus.ti.com/docs/toolsw/folders/print/tmdxevm3503.html
175 [5] OpenPandora Ltd. Pandora:
177 http://openpandora.org/
179 [6] TI/Logic PD Zoom MDK:
181 http://www.logicpd.com/products/devkit/ti/zoom_mobile_development_kit
183 [7] TI/Logic PD Zoom 2
185 http://www.logicpd.com/sites/default/files/1012659A_Zoom_OMAP34x-II_MDP_Brief.pdf
187 [8] CompuLab Ltd. CM-T35:
189 http://www.compulab.co.il/t3530/html/t3530-cm-datasheet.htm
193 http://beagleboard.googlecode.com/files/u-boot_beagle_revb.tar.gz