diff options
| author | Sudhakar Rajashekhara <sudhakar.raj@ti.com> | 2010-01-21 15:05:20 +0530 |
|---|---|---|
| committer | Sudhakar Rajashekhara <sudhakar.raj@ti.com> | 2010-01-21 15:26:28 +0530 |
| commit | 6b7a97cbd0568cd156db994eeec0f706d20aa76d (patch) | |
| tree | ffc9c6f6431afc67f5dfd2319a4a12e1fd65c5d8 | |
| parent | 4312018de5b3f5370d8776d0a8d21d4bc8b24f4d (diff) | |
From: Sekhar Nori <nsekhar@ti.com>
u-boot: da850/omap-l138: include provision to wake up DSP.
DSP is woken-up by default on DA850/OMAP-L138.
To prevent DSP from being woken up, set the environment variable
dspwake to no.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
| -rw-r--r-- | board/davinci/da8xxevm/da850evm.c | 48 | ||||
| -rw-r--r-- | include/asm-arm/arch-davinci/hardware.h | 4 |
2 files changed, 52 insertions, 0 deletions
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c index 5fed7f531c..e9e8d7fee5 100644 --- a/board/davinci/da8xxevm/da850evm.c +++ b/board/davinci/da8xxevm/da850evm.c @@ -371,6 +371,52 @@ int rmii_hw_init(void) } #endif +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; + + /* if the device is ARM only, return */ + if ((REG(CHIP_REV_ID_REG) & 0x3f) == 0x10) + return; + + if (!strcmp(getenv("dspwake"), "no")) + return; + + *resetvect++ = 0x1E000; /* DSP Idle */ + /* clear out the next 10 words as NOP */ + memset(resetvect, 0, sizeof(unsigned) * 10); + + /* setup the DSP reset vector */ + REG(HOST1CFG) = DAVINCI_L3CBARAM_BASE; + + dsp_lpsc_on(1, DAVINCI_LPSC_GEM); + REG(PSC0_MDCTL + (15 * 4)) |= 0x100; +} + int misc_init_r(void) { uint8_t tmp[20], addr[10]; @@ -398,6 +444,8 @@ int misc_init_r(void) printf("RMII hardware init failed!!!\n"); #endif + dspwake(); + return (0); } diff --git a/include/asm-arm/arch-davinci/hardware.h b/include/asm-arm/arch-davinci/hardware.h index f22a77dac4..e36c15bf11 100644 --- a/include/asm-arm/arch-davinci/hardware.h +++ b/include/asm-arm/arch-davinci/hardware.h @@ -150,8 +150,12 @@ typedef volatile unsigned int * dv_reg_p; #define DAVINCI_DDR_EMIF_DATA_BASE 0xc0000000 #define DAVINCI_INTC_BASE 0xfffee000 #define DAVINCI_BOOTCFG_BASE 0x01c14000 +#define DAVINCI_L3CBARAM_BASE 0x80000000 #define JTAG_ID_REG (DAVINCI_BOOTCFG_BASE + 0x18) +#define CHIP_REV_ID_REG (DAVINCI_BOOTCFG_BASE + 0x24) +#define HOST1CFG (DAVINCI_BOOTCFG_BASE + 0x44) #define CFGCHIP3 (DAVINCI_BOOTCFG_BASE + 0x188) +#define PSC0_MDCTL (DAVINCI_PSC0_BASE + 0xa00) #define GPIO_BANK2_REG_DIR_ADDR (DAVINCI_GPIO_BASE + 0x38) #define GPIO_BANK2_REG_OPDATA_ADDR (DAVINCI_GPIO_BASE + 0x3c) #define GPIO_BANK2_REG_SET_ADDR (DAVINCI_GPIO_BASE + 0x40) |