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| author | Nagabhushana Netagunte <nagabhushana.netagunte@ti.com> | 2011-09-03 22:19:28 -0400 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-09-04 11:36:19 +0200 |
| commit | cf2c24e3996e49a26b449ab7daf843856b35b5c8 (patch) | |
| tree | 22d39b0c5e95b4249529c7f5675c842e9a71b8c7 /board/davinci | |
| parent | ac935e567bee77b39fc37c1ad360bb0d1ac07c4e (diff) | |
| download | u-boot-imx-cf2c24e3996e49a26b449ab7daf843856b35b5c8.zip u-boot-imx-cf2c24e3996e49a26b449ab7daf843856b35b5c8.tar.gz u-boot-imx-cf2c24e3996e49a26b449ab7daf843856b35b5c8.tar.bz2 | |
da850: add support to wake up DSP during board init
add support for DSP wake-up by default on DA850/OMAP-L138
during board initialization. Enable hwconfig environment and added
extra env setting through CONFIG_EXTRA_ENV_SETTINGS.
To prevent DSP from being woken up,set the environment variable as,
set hwconfig "dsp:wake=no"
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Diffstat (limited to 'board/davinci')
| -rw-r--r-- | board/davinci/da8xxevm/da850evm.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c index d3d965c..8c3d64e 100644 --- a/board/davinci/da8xxevm/da850evm.c +++ b/board/davinci/da8xxevm/da850evm.c @@ -30,6 +30,7 @@ #include <asm/arch/emac_defs.h> #include <asm/io.h> #include <asm/arch/davinci_misc.h> +#include <hwconfig.h> DECLARE_GLOBAL_DATA_PTR; @@ -163,6 +164,64 @@ const struct pinmux_config nor_pins[] = { #endif #endif /* CONFIG_DRIVER_TI_EMAC */ +void dsp_lpsc_on(unsigned domain, unsigned int id) +{ + dv_reg_p mdstat, mdctl, ptstat, ptcmd; + struct davinci_psc_regs *psc_regs; + + psc_regs = davinci_psc0_regs; + mdstat = &psc_regs->psc0.mdstat[id]; + mdctl = &psc_regs->psc0.mdctl[id]; + ptstat = &psc_regs->ptstat; + ptcmd = &psc_regs->ptcmd; + + while (*ptstat & (0x1 << domain)) + ; + + if ((*mdstat & 0x1f) == 0x03) + return; /* Already on and enabled */ + + *mdctl |= 0x03; + + *ptcmd = 0x1 << domain; + + while (*ptstat & (0x1 << domain)) + ; + while ((*mdstat & 0x1f) != 0x03) + ; /* Probably an overkill... */ +} + +static void dspwake(void) +{ + unsigned *resetvect = (unsigned *)DAVINCI_L3CBARAM_BASE; + u32 val; + + /* if the device is ARM only, return */ + if ((readl(CHIP_REV_ID_REG) & 0x3f) == 0x10) + return; + + if (hwconfig_subarg_cmp_f("dsp", "wake", "no", NULL)) + return; + + *resetvect++ = 0x1E000; /* DSP Idle */ + /* clear out the next 10 words as NOP */ + memset(resetvect, 0, sizeof(unsigned) *10); + + /* setup the DSP reset vector */ + writel(DAVINCI_L3CBARAM_BASE, HOST1CFG); + + dsp_lpsc_on(1, DAVINCI_LPSC_GEM); + val = readl(PSC0_MDCTL + (15 * 4)); + val |= 0x100; + writel(val, (PSC0_MDCTL + (15 * 4))); +} + +int misc_init_r(void) +{ + dspwake(); + return 0; +} + static const struct pinmux_resource pinmuxes[] = { #ifdef CONFIG_SPI_FLASH PINMUX_ITEM(spi1_pins), |