diff options
Diffstat (limited to 'arch/arm/cpu/armv7/mx6')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/ddr.c | 44 |
1 files changed, 12 insertions, 32 deletions
diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c index e457feb..1e7ae28 100644 --- a/arch/arm/cpu/armv7/mx6/ddr.c +++ b/arch/arm/cpu/armv7/mx6/ddr.c @@ -12,40 +12,20 @@ #include <asm/arch/sys_proto.h> #include <asm/io.h> #include <asm/types.h> +#include <wait_bit.h> #if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D) -static int wait_for_bit(void *reg, const uint32_t mask, bool set) -{ - unsigned int timeout = 1000; - u32 val; - - while (--timeout) { - val = readl(reg); - if (!set) - val = ~val; - - if ((val & mask) == mask) - return 0; - - udelay(1); - } - - printf("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n", - __func__, reg, mask, set); - hang(); /* DRAM couldn't be calibrated, game over :-( */ -} - static void reset_read_data_fifos(void) { struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR; /* Reset data FIFOs twice. */ setbits_le32(&mmdc0->mpdgctrl0, 1 << 31); - wait_for_bit(&mmdc0->mpdgctrl0, 1 << 31, 0); + wait_for_bit("MMDC", &mmdc0->mpdgctrl0, 1 << 31, 0, 100, 0); setbits_le32(&mmdc0->mpdgctrl0, 1 << 31); - wait_for_bit(&mmdc0->mpdgctrl0, 1 << 31, 0); + wait_for_bit("MMDC", &mmdc0->mpdgctrl0, 1 << 31, 0, 100, 0); } static void precharge_all(const bool cs0_enable, const bool cs1_enable) @@ -60,12 +40,12 @@ static void precharge_all(const bool cs0_enable, const bool cs1_enable) */ if (cs0_enable) { /* CS0 */ writel(0x04008050, &mmdc0->mdscr); - wait_for_bit(&mmdc0->mdscr, 1 << 14, 1); + wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 1, 100, 0); } if (cs1_enable) { /* CS1 */ writel(0x04008058, &mmdc0->mdscr); - wait_for_bit(&mmdc0->mdscr, 1 << 14, 1); + wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 1, 100, 0); } } @@ -164,7 +144,7 @@ int mmdc_do_write_level_calibration(void) * 7. Upon completion of this process the MMDC de-asserts * the MPWLGCR[HW_WL_EN] */ - wait_for_bit(&mmdc0->mpwlgcr, 1 << 0, 0); + wait_for_bit("MMDC", &mmdc0->mpwlgcr, 1 << 0, 0, 100, 0); /* * 8. check for any errors: check both PHYs for x64 configuration, @@ -289,7 +269,7 @@ int mmdc_do_dqs_calibration(void) writel(0x00008028, &mmdc0->mdscr); /* poll to make sure the con_ack bit was asserted */ - wait_for_bit(&mmdc0->mdscr, 1 << 14, 1); + wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 1, 100, 0); /* * Check MDMISC register CALIB_PER_CS to see which CS calibration @@ -327,7 +307,7 @@ int mmdc_do_dqs_calibration(void) * this bit until it clears to indicate completion of the write access. */ setbits_le32(&mmdc0->mpswdar0, 1); - wait_for_bit(&mmdc0->mpswdar0, 1 << 0, 0); + wait_for_bit("MMDC", &mmdc0->mpswdar0, 1 << 0, 0, 100, 0); /* Set the RD_DL_ABS# bits to their default values * (will be calibrated later in the read delay-line calibration). @@ -372,7 +352,7 @@ int mmdc_do_dqs_calibration(void) setbits_le32(&mmdc0->mpdgctrl0, 5 << 28); /* Poll for completion. MPDGCTRL0[HW_DG_EN] should be 0 */ - wait_for_bit(&mmdc0->mpdgctrl0, 1 << 28, 0); + wait_for_bit("MMDC", &mmdc0->mpdgctrl0, 1 << 28, 0, 100, 0); /* * Check to see if any errors were encountered during calibration @@ -431,7 +411,7 @@ int mmdc_do_dqs_calibration(void) * setting MPRDDLHWCTL[HW_RD_DL_EN] = 0. Also, ensure that * no error bits were set. */ - wait_for_bit(&mmdc0->mprddlhwctl, 1 << 4, 0); + wait_for_bit("MMDC", &mmdc0->mprddlhwctl, 1 << 4, 0, 100, 0); /* check both PHYs for x64 configuration, if x32, check only PHY0 */ if (readl(&mmdc0->mprddlhwctl) & 0x0000000f) @@ -484,7 +464,7 @@ int mmdc_do_dqs_calibration(void) * by setting MPWRDLHWCTL[HW_WR_DL_EN] = 0. * Also, ensure that no error bits were set. */ - wait_for_bit(&mmdc0->mpwrdlhwctl, 1 << 4, 0); + wait_for_bit("MMDC", &mmdc0->mpwrdlhwctl, 1 << 4, 0, 100, 0); /* Check both PHYs for x64 configuration, if x32, check only PHY0 */ if (readl(&mmdc0->mpwrdlhwctl) & 0x0000000f) @@ -532,7 +512,7 @@ int mmdc_do_dqs_calibration(void) writel(0x0, &mmdc0->mdscr); /* CS0 */ /* Poll to make sure the con_ack bit is clear */ - wait_for_bit(&mmdc0->mdscr, 1 << 14, 0); + wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 0, 100, 0); /* * Print out the registers that were updated as a result |