On Wed, Feb 10, 2021 at 3:12 AM Jaehoon Chung jh80.chung@samsung.com wrote:
Hi Rayagonda,
On 2/9/21 1:34 PM, Rayagonda Kokatanur wrote:
From: Bharat Gooty bharat.gooty@broadcom.com
Add tuning functionality which is needed for HS200 mode. For HS200, program the correct needed 1.8 voltage
I didn't test with this on target. But how did you use HS200 mode? In this patch, there is no set to HS200 mode. Is there any other patch.
It can be enabled from a config file (configs/bcm_ns3_defconfig) based on requirement. Hence not added config file changes.
Signed-off-by: Bharat Gooty bharat.gooty@broadcom.com Signed-off-by: Rayagonda Kokatanur rayagonda.kokatanur@broadcom.com
drivers/mmc/iproc_sdhci.c | 88 +++++++++++++++++++++++++++++++++++---- 1 file changed, 79 insertions(+), 9 deletions(-)
diff --git a/drivers/mmc/iproc_sdhci.c b/drivers/mmc/iproc_sdhci.c index f931e4b3c1..360ea01e21 100644 --- a/drivers/mmc/iproc_sdhci.c +++ b/drivers/mmc/iproc_sdhci.c @@ -9,6 +9,7 @@ #include <errno.h> #include <malloc.h> #include <sdhci.h> +#include "mmc_private.h" #include <linux/delay.h>
DECLARE_GLOBAL_DATA_PTR; @@ -139,17 +140,87 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
static int sdhci_iproc_set_ios_post(struct sdhci_host *host) {
u32 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
struct mmc *mmc = (struct mmc *)host->mmc;u32 ctrl;
/* Reset UHS mode bits */ctrl &= ~SDHCI_CTRL_UHS_MASK;
if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);ctrl |= SDHCI_CTRL_VDD_180;sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);}
if (host->mmc->ddr_mode)ctrl |= UHS_DDR50_BUS_SPEED;Doesn't need to remove this? If someone want to use DDR mode, doesn't need to set this bit?
Supported speeds can come from the capabilities registers
sdhci_set_uhs_timing(host);return 0;+}
+static void sdhci_start_tuning(struct sdhci_host *host) +{
u32 ctrl;ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);ctrl |= SDHCI_CTRL_EXEC_TUNING; sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
return 0;
sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);+}
+static void sdhci_end_tuning(struct sdhci_host *host) +{
/* Enable only interrupts served by the SD controller */sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK,SDHCI_INT_ENABLE);/* Mask all sdhci interrupt sources */sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);+}
+static int sdhci_iproc_execute_tuning(struct mmc *mmc, u8 opcode) +{ +#define MAX_TUNING_LOOP 40
Move to top.
Thank you, will fix it.
struct mmc_cmd cmd;u32 ctrl;u32 blocksize = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 64);struct sdhci_host *host = dev_get_priv(mmc->dev);char tuning_loop_counter = MAX_TUNING_LOOP;int ret = 0;sdhci_start_tuning(host);cmd.cmdidx = opcode;cmd.resp_type = MMC_RSP_R1;cmd.cmdarg = 0;if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200 && mmc->bus_width == 8)According to spec, HS200 can be used with 4/8 bit buswidth.
Iproc SDHCI controller supports HS200 in 8bit mode only.
blocksize = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 128);sdhci_writew(host, blocksize, SDHCI_BLOCK_SIZE);sdhci_writew(host, 1, SDHCI_BLOCK_COUNT);sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);do {mmc_send_cmd(mmc, &cmd, NULL);if (opcode == MMC_CMD_SEND_TUNING_BLOCK)udelay(1);Add the comment to add udelay(1).
Sure, thank you.
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);if (tuning_loop_counter-- == 0)break;} while (ctrl & SDHCI_CTRL_EXEC_TUNING);if (tuning_loop_counter < 0 || (!(ctrl & SDHCI_CTRL_TUNED_CLK))) {ctrl &= ~(SDHCI_CTRL_TUNED_CLK | SDHCI_CTRL_EXEC_TUNING);sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL2);printf("%s:Tuning failed, opcode = 0x%02x\n", __func__, opcode);ret = -EIO;}udelay(1);Doesn't need to add udelay(1) at here?
okay, will remove it.
Best Regards, Jaehoon Chung
sdhci_end_tuning(host);return ret;}
static struct sdhci_ops sdhci_platform_ops = { @@ -162,6 +233,7 @@ static struct sdhci_ops sdhci_platform_ops = { .write_b = sdhci_iproc_writeb, #endif .set_ios_post = sdhci_iproc_set_ios_post,
.platform_execute_tuning = sdhci_iproc_execute_tuning,};
struct iproc_sdhci_plat { @@ -189,9 +261,7 @@ static int iproc_sdhci_probe(struct udevice *dev)
host->name = dev->name; host->ioaddr = dev_read_addr_ptr(dev);
host->voltages = MMC_VDD_165_195 |MMC_VDD_32_33 | MMC_VDD_33_34;host->quirks = SDHCI_QUIRK_BROKEN_VOLTAGE | SDHCI_QUIRK_BROKEN_R1B;
host->quirks = SDHCI_QUIRK_BROKEN_R1B; host->host_caps = MMC_MODE_DDR_52MHz; host->index = fdtdec_get_uint(gd->fdt_blob, node, "index", 0); host->ops = &sdhci_platform_ops;