From 08f87f769b595151be1afeff53e144f543faa614 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 06 Dec 2023 09:51:13 +0000
Subject: [PATCH] add dts config
---
kernel/drivers/mmc/host/sdhci-of-esdhc.c | 757 +++++++++++++++++++++++++++++++++++++++++++++++++--------
1 files changed, 649 insertions(+), 108 deletions(-)
diff --git a/kernel/drivers/mmc/host/sdhci-of-esdhc.c b/kernel/drivers/mmc/host/sdhci-of-esdhc.c
index d6cb0f9..d533749 100644
--- a/kernel/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/kernel/drivers/mmc/host/sdhci-of-esdhc.c
@@ -1,16 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Freescale eSDHC controller driver.
*
* Copyright (c) 2007, 2010, 2012 Freescale Semiconductor, Inc.
* Copyright (c) 2009 MontaVista Software, Inc.
+ * Copyright 2020 NXP
*
* Authors: Xiaobo Xie <X.Xie@freescale.com>
* Anton Vorontsov <avorontsov@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
*/
#include <linux/err.h>
@@ -23,7 +20,9 @@
#include <linux/clk.h>
#include <linux/ktime.h>
#include <linux/dma-mapping.h>
+#include <linux/iopoll.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
@@ -78,8 +77,17 @@
u8 vendor_ver;
u8 spec_ver;
bool quirk_incorrect_hostver;
+ bool quirk_limited_clk_division;
+ bool quirk_unreliable_pulse_detection;
+ bool quirk_tuning_erratum_type1;
+ bool quirk_tuning_erratum_type2;
+ bool quirk_ignore_data_inhibit;
+ bool quirk_delay_before_data_reset;
+ bool quirk_trans_complete_erratum;
+ bool in_sw_tuning;
unsigned int peripheral_clock;
const struct esdhc_clk_fixup *clk_fixup;
+ u32 div_ratio;
};
/**
@@ -143,6 +151,19 @@
return ret;
}
+ /*
+ * Some controllers have unreliable Data Line Active
+ * bit for commands with busy signal. This affects
+ * Command Inhibit (data) bit. Just ignore it since
+ * MMC core driver has already polled card status
+ * with CMD13 after any command with busy siganl.
+ */
+ if ((spec_reg == SDHCI_PRESENT_STATE) &&
+ (esdhc->quirk_ignore_data_inhibit == true)) {
+ ret = value & ~SDHCI_DATA_INHIBIT;
+ return ret;
+ }
+
ret = value;
return ret;
}
@@ -154,6 +175,9 @@
struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
u16 ret;
int shift = (spec_reg & 0x2) * 8;
+
+ if (spec_reg == SDHCI_TRANSFER_MODE)
+ return pltfm_host->xfer_mode_shadow;
if (spec_reg == SDHCI_HOST_VERSION)
ret = value & 0xffff;
@@ -393,6 +417,8 @@
static void esdhc_be_writew(struct sdhci_host *host, u16 val, int reg)
{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
int base = reg & ~0x3;
u32 value;
u32 ret;
@@ -401,10 +427,24 @@
ret = esdhc_writew_fixup(host, reg, val, value);
if (reg != SDHCI_TRANSFER_MODE)
iowrite32be(ret, host->ioaddr + base);
+
+ /* Starting SW tuning requires ESDHC_SMPCLKSEL to be set
+ * 1us later after ESDHC_EXTN is set.
+ */
+ if (base == ESDHC_SYSTEM_CONTROL_2) {
+ if (!(value & ESDHC_EXTN) && (ret & ESDHC_EXTN) &&
+ esdhc->in_sw_tuning) {
+ udelay(1);
+ ret |= ESDHC_SMPCLKSEL;
+ iowrite32be(ret, host->ioaddr + base);
+ }
+ }
}
static void esdhc_le_writew(struct sdhci_host *host, u16 val, int reg)
{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
int base = reg & ~0x3;
u32 value;
u32 ret;
@@ -413,6 +453,18 @@
ret = esdhc_writew_fixup(host, reg, val, value);
if (reg != SDHCI_TRANSFER_MODE)
iowrite32(ret, host->ioaddr + base);
+
+ /* Starting SW tuning requires ESDHC_SMPCLKSEL to be set
+ * 1us later after ESDHC_EXTN is set.
+ */
+ if (base == ESDHC_SYSTEM_CONTROL_2) {
+ if (!(value & ESDHC_EXTN) && (ret & ESDHC_EXTN) &&
+ esdhc->in_sw_tuning) {
+ udelay(1);
+ ret |= ESDHC_SMPCLKSEL;
+ iowrite32(ret, host->ioaddr + base);
+ }
+ }
}
static void esdhc_be_writeb(struct sdhci_host *host, u8 val, int reg)
@@ -520,91 +572,36 @@
static void esdhc_clock_enable(struct sdhci_host *host, bool enable)
{
- u32 val;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
ktime_t timeout;
+ u32 val, clk_en;
+
+ clk_en = ESDHC_CLOCK_SDCLKEN;
+
+ /*
+ * IPGEN/HCKEN/PEREN bits exist on eSDHC whose vendor version
+ * is 2.2 or lower.
+ */
+ if (esdhc->vendor_ver <= VENDOR_V_22)
+ clk_en |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN |
+ ESDHC_CLOCK_PEREN);
val = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
if (enable)
- val |= ESDHC_CLOCK_SDCLKEN;
+ val |= clk_en;
else
- val &= ~ESDHC_CLOCK_SDCLKEN;
+ val &= ~clk_en;
sdhci_writel(host, val, ESDHC_SYSTEM_CONTROL);
- /* Wait max 20 ms */
+ /*
+ * Wait max 20 ms. If vendor version is 2.2 or lower, do not
+ * wait clock stable bit which does not exist.
+ */
timeout = ktime_add_ms(ktime_get(), 20);
- val = ESDHC_CLOCK_STABLE;
- while (1) {
- bool timedout = ktime_after(ktime_get(), timeout);
-
- if (sdhci_readl(host, ESDHC_PRSSTAT) & val)
- break;
- if (timedout) {
- pr_err("%s: Internal clock never stabilised.\n",
- mmc_hostname(host->mmc));
- break;
- }
- udelay(10);
- }
-}
-
-static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
-{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
- int pre_div = 1;
- int div = 1;
- ktime_t timeout;
- long fixup = 0;
- u32 temp;
-
- host->mmc->actual_clock = 0;
-
- if (clock == 0) {
- esdhc_clock_enable(host, false);
- return;
- }
-
- /* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */
- if (esdhc->vendor_ver < VENDOR_V_23)
- pre_div = 2;
-
- if (host->mmc->card && mmc_card_sd(host->mmc->card) &&
- esdhc->clk_fixup && host->mmc->ios.timing == MMC_TIMING_LEGACY)
- fixup = esdhc->clk_fixup->sd_dflt_max_clk;
- else if (esdhc->clk_fixup)
- fixup = esdhc->clk_fixup->max_clk[host->mmc->ios.timing];
-
- if (fixup && clock > fixup)
- clock = fixup;
-
- temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
- temp &= ~(ESDHC_CLOCK_SDCLKEN | ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN |
- ESDHC_CLOCK_PEREN | ESDHC_CLOCK_MASK);
- sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
-
- while (host->max_clk / pre_div / 16 > clock && pre_div < 256)
- pre_div *= 2;
-
- while (host->max_clk / pre_div / div > clock && div < 16)
- div++;
-
- dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
- clock, host->max_clk / pre_div / div);
- host->mmc->actual_clock = host->max_clk / pre_div / div;
- pre_div >>= 1;
- div--;
-
- temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
- temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
- | (div << ESDHC_DIVIDER_SHIFT)
- | (pre_div << ESDHC_PREDIV_SHIFT));
- sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
-
- /* Wait max 20 ms */
- timeout = ktime_add_ms(ktime_get(), 20);
- while (1) {
+ while (esdhc->vendor_ver > VENDOR_V_22) {
bool timedout = ktime_after(ktime_get(), timeout);
if (sdhci_readl(host, ESDHC_PRSSTAT) & ESDHC_CLOCK_STABLE)
@@ -612,13 +609,168 @@
if (timedout) {
pr_err("%s: Internal clock never stabilised.\n",
mmc_hostname(host->mmc));
- return;
+ break;
}
- udelay(10);
+ usleep_range(10, 20);
+ }
+}
+
+static void esdhc_flush_async_fifo(struct sdhci_host *host)
+{
+ ktime_t timeout;
+ u32 val;
+
+ val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ val |= ESDHC_FLUSH_ASYNC_FIFO;
+ sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
+
+ /* Wait max 20 ms */
+ timeout = ktime_add_ms(ktime_get(), 20);
+ while (1) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ if (!(sdhci_readl(host, ESDHC_DMA_SYSCTL) &
+ ESDHC_FLUSH_ASYNC_FIFO))
+ break;
+ if (timedout) {
+ pr_err("%s: flushing asynchronous FIFO timeout.\n",
+ mmc_hostname(host->mmc));
+ break;
+ }
+ usleep_range(10, 20);
+ }
+}
+
+static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ unsigned int pre_div = 1, div = 1;
+ unsigned int clock_fixup = 0;
+ ktime_t timeout;
+ u32 temp;
+
+ if (clock == 0) {
+ host->mmc->actual_clock = 0;
+ esdhc_clock_enable(host, false);
+ return;
}
- temp |= ESDHC_CLOCK_SDCLKEN;
+ /* Start pre_div at 2 for vendor version < 2.3. */
+ if (esdhc->vendor_ver < VENDOR_V_23)
+ pre_div = 2;
+
+ /* Fix clock value. */
+ if (host->mmc->card && mmc_card_sd(host->mmc->card) &&
+ esdhc->clk_fixup && host->mmc->ios.timing == MMC_TIMING_LEGACY)
+ clock_fixup = esdhc->clk_fixup->sd_dflt_max_clk;
+ else if (esdhc->clk_fixup)
+ clock_fixup = esdhc->clk_fixup->max_clk[host->mmc->ios.timing];
+
+ if (clock_fixup == 0 || clock < clock_fixup)
+ clock_fixup = clock;
+
+ /* Calculate pre_div and div. */
+ while (host->max_clk / pre_div / 16 > clock_fixup && pre_div < 256)
+ pre_div *= 2;
+
+ while (host->max_clk / pre_div / div > clock_fixup && div < 16)
+ div++;
+
+ esdhc->div_ratio = pre_div * div;
+
+ /* Limit clock division for HS400 200MHz clock for quirk. */
+ if (esdhc->quirk_limited_clk_division &&
+ clock == MMC_HS200_MAX_DTR &&
+ (host->mmc->ios.timing == MMC_TIMING_MMC_HS400 ||
+ host->flags & SDHCI_HS400_TUNING)) {
+ if (esdhc->div_ratio <= 4) {
+ pre_div = 4;
+ div = 1;
+ } else if (esdhc->div_ratio <= 8) {
+ pre_div = 4;
+ div = 2;
+ } else if (esdhc->div_ratio <= 12) {
+ pre_div = 4;
+ div = 3;
+ } else {
+ pr_warn("%s: using unsupported clock division.\n",
+ mmc_hostname(host->mmc));
+ }
+ esdhc->div_ratio = pre_div * div;
+ }
+
+ host->mmc->actual_clock = host->max_clk / esdhc->div_ratio;
+
+ dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
+ clock, host->mmc->actual_clock);
+
+ /* Set clock division into register. */
+ pre_div >>= 1;
+ div--;
+
+ esdhc_clock_enable(host, false);
+
+ temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
+ temp &= ~ESDHC_CLOCK_MASK;
+ temp |= ((div << ESDHC_DIVIDER_SHIFT) |
+ (pre_div << ESDHC_PREDIV_SHIFT));
sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
+
+ /*
+ * Wait max 20 ms. If vendor version is 2.2 or lower, do not
+ * wait clock stable bit which does not exist.
+ */
+ timeout = ktime_add_ms(ktime_get(), 20);
+ while (esdhc->vendor_ver > VENDOR_V_22) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ if (sdhci_readl(host, ESDHC_PRSSTAT) & ESDHC_CLOCK_STABLE)
+ break;
+ if (timedout) {
+ pr_err("%s: Internal clock never stabilised.\n",
+ mmc_hostname(host->mmc));
+ break;
+ }
+ usleep_range(10, 20);
+ }
+
+ /* Additional setting for HS400. */
+ if (host->mmc->ios.timing == MMC_TIMING_MMC_HS400 &&
+ clock == MMC_HS200_MAX_DTR) {
+ temp = sdhci_readl(host, ESDHC_TBCTL);
+ sdhci_writel(host, temp | ESDHC_HS400_MODE, ESDHC_TBCTL);
+ temp = sdhci_readl(host, ESDHC_SDCLKCTL);
+ sdhci_writel(host, temp | ESDHC_CMD_CLK_CTL, ESDHC_SDCLKCTL);
+ esdhc_clock_enable(host, true);
+
+ temp = sdhci_readl(host, ESDHC_DLLCFG0);
+ temp |= ESDHC_DLL_ENABLE;
+ if (host->mmc->actual_clock == MMC_HS200_MAX_DTR)
+ temp |= ESDHC_DLL_FREQ_SEL;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+
+ temp |= ESDHC_DLL_RESET;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+ udelay(1);
+ temp &= ~ESDHC_DLL_RESET;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+
+ /* Wait max 20 ms */
+ if (read_poll_timeout(sdhci_readl, temp,
+ temp & ESDHC_DLL_STS_SLV_LOCK,
+ 10, 20000, false,
+ host, ESDHC_DLLSTAT0))
+ pr_err("%s: timeout for delay chain lock.\n",
+ mmc_hostname(host->mmc));
+
+ temp = sdhci_readl(host, ESDHC_TBCTL);
+ sdhci_writel(host, temp | ESDHC_HS400_WNDW_ADJUST, ESDHC_TBCTL);
+
+ esdhc_clock_enable(host, false);
+ esdhc_flush_async_fifo(host);
+ }
+ esdhc_clock_enable(host, true);
}
static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
@@ -645,17 +797,65 @@
static void esdhc_reset(struct sdhci_host *host, u8 mask)
{
- u32 val;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 val, bus_width = 0;
+
+ /*
+ * Add delay to make sure all the DMA transfers are finished
+ * for quirk.
+ */
+ if (esdhc->quirk_delay_before_data_reset &&
+ (mask & SDHCI_RESET_DATA) &&
+ (host->flags & SDHCI_REQ_USE_DMA))
+ mdelay(5);
+
+ /*
+ * Save bus-width for eSDHC whose vendor version is 2.2
+ * or lower for data reset.
+ */
+ if ((mask & SDHCI_RESET_DATA) &&
+ (esdhc->vendor_ver <= VENDOR_V_22)) {
+ val = sdhci_readl(host, ESDHC_PROCTL);
+ bus_width = val & ESDHC_CTRL_BUSWIDTH_MASK;
+ }
sdhci_reset(host, mask);
- sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
- sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ /*
+ * Restore bus-width setting and interrupt registers for eSDHC
+ * whose vendor version is 2.2 or lower for data reset.
+ */
+ if ((mask & SDHCI_RESET_DATA) &&
+ (esdhc->vendor_ver <= VENDOR_V_22)) {
+ val = sdhci_readl(host, ESDHC_PROCTL);
+ val &= ~ESDHC_CTRL_BUSWIDTH_MASK;
+ val |= bus_width;
+ sdhci_writel(host, val, ESDHC_PROCTL);
- if (mask & SDHCI_RESET_ALL) {
+ sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+ sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ }
+
+ /*
+ * Some bits have to be cleaned manually for eSDHC whose spec
+ * version is higher than 3.0 for all reset.
+ */
+ if ((mask & SDHCI_RESET_ALL) &&
+ (esdhc->spec_ver >= SDHCI_SPEC_300)) {
val = sdhci_readl(host, ESDHC_TBCTL);
val &= ~ESDHC_TB_EN;
sdhci_writel(host, val, ESDHC_TBCTL);
+
+ /*
+ * Initialize eSDHC_DLLCFG1[DLL_PD_PULSE_STRETCH_SEL] to
+ * 0 for quirk.
+ */
+ if (esdhc->quirk_unreliable_pulse_detection) {
+ val = sdhci_readl(host, ESDHC_DLLCFG1);
+ val &= ~ESDHC_DLL_PD_PULSE_STRETCH_SEL;
+ sdhci_writel(host, val, ESDHC_DLLCFG1);
+ }
}
}
@@ -704,6 +904,7 @@
scfg_node = of_find_matching_node(NULL, scfg_device_ids);
if (scfg_node)
scfg_base = of_iomap(scfg_node, 0);
+ of_node_put(scfg_node);
if (scfg_base) {
sdhciovselcr = SDHCIOVSELCR_TGLEN |
SDHCIOVSELCR_VSELVAL;
@@ -729,23 +930,303 @@
}
}
+static struct soc_device_attribute soc_tuning_erratum_type1[] = {
+ { .family = "QorIQ T1023", },
+ { .family = "QorIQ T1040", },
+ { .family = "QorIQ T2080", },
+ { .family = "QorIQ LS1021A", },
+ { },
+};
+
+static struct soc_device_attribute soc_tuning_erratum_type2[] = {
+ { .family = "QorIQ LS1012A", },
+ { .family = "QorIQ LS1043A", },
+ { .family = "QorIQ LS1046A", },
+ { .family = "QorIQ LS1080A", },
+ { .family = "QorIQ LS2080A", },
+ { .family = "QorIQ LA1575A", },
+ { },
+};
+
+static void esdhc_tuning_block_enable(struct sdhci_host *host, bool enable)
+{
+ u32 val;
+
+ esdhc_clock_enable(host, false);
+ esdhc_flush_async_fifo(host);
+
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ if (enable)
+ val |= ESDHC_TB_EN;
+ else
+ val &= ~ESDHC_TB_EN;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ esdhc_clock_enable(host, true);
+}
+
+static void esdhc_tuning_window_ptr(struct sdhci_host *host, u8 *window_start,
+ u8 *window_end)
+{
+ u32 val;
+
+ /* Write TBCTL[11:8]=4'h8 */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~(0xf << 8);
+ val |= 8 << 8;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ mdelay(1);
+
+ /* Read TBCTL[31:0] register and rewrite again */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ mdelay(1);
+
+ /* Read the TBSTAT[31:0] register twice */
+ val = sdhci_readl(host, ESDHC_TBSTAT);
+ val = sdhci_readl(host, ESDHC_TBSTAT);
+
+ *window_end = val & 0xff;
+ *window_start = (val >> 8) & 0xff;
+}
+
+static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start,
+ u8 *window_end)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u8 start_ptr, end_ptr;
+
+ if (esdhc->quirk_tuning_erratum_type1) {
+ *window_start = 5 * esdhc->div_ratio;
+ *window_end = 3 * esdhc->div_ratio;
+ return;
+ }
+
+ esdhc_tuning_window_ptr(host, &start_ptr, &end_ptr);
+
+ /* Reset data lines by setting ESDHCCTL[RSTD] */
+ sdhci_reset(host, SDHCI_RESET_DATA);
+ /* Write 32'hFFFF_FFFF to IRQSTAT register */
+ sdhci_writel(host, 0xFFFFFFFF, SDHCI_INT_STATUS);
+
+ /* If TBSTAT[15:8]-TBSTAT[7:0] > (4 * div_ratio) + 2
+ * or TBSTAT[7:0]-TBSTAT[15:8] > (4 * div_ratio) + 2,
+ * then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio
+ * and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio.
+ */
+
+ if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio + 2)) {
+ *window_start = 8 * esdhc->div_ratio;
+ *window_end = 4 * esdhc->div_ratio;
+ } else {
+ *window_start = 5 * esdhc->div_ratio;
+ *window_end = 3 * esdhc->div_ratio;
+ }
+}
+
+static int esdhc_execute_sw_tuning(struct mmc_host *mmc, u32 opcode,
+ u8 window_start, u8 window_end)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 val;
+ int ret;
+
+ /* Program TBPTR[TB_WNDW_END_PTR] and TBPTR[TB_WNDW_START_PTR] */
+ val = ((u32)window_start << ESDHC_WNDW_STRT_PTR_SHIFT) &
+ ESDHC_WNDW_STRT_PTR_MASK;
+ val |= window_end & ESDHC_WNDW_END_PTR_MASK;
+ sdhci_writel(host, val, ESDHC_TBPTR);
+
+ /* Program the software tuning mode by setting TBCTL[TB_MODE]=2'h3 */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_TB_MODE_MASK;
+ val |= ESDHC_TB_MODE_SW;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ esdhc->in_sw_tuning = true;
+ ret = sdhci_execute_tuning(mmc, opcode);
+ esdhc->in_sw_tuning = false;
+ return ret;
+}
+
static int esdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u8 window_start, window_end;
+ int ret, retries = 1;
+ bool hs400_tuning;
+ unsigned int clk;
u32 val;
- /* Use tuning block for tuning procedure */
- esdhc_clock_enable(host, false);
- val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
- val |= ESDHC_FLUSH_ASYNC_FIFO;
- sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
+ /* For tuning mode, the sd clock divisor value
+ * must be larger than 3 according to reference manual.
+ */
+ clk = esdhc->peripheral_clock / 3;
+ if (host->clock > clk)
+ esdhc_of_set_clock(host, clk);
+ esdhc_tuning_block_enable(host, true);
+
+ /*
+ * The eSDHC controller takes the data timeout value into account
+ * during tuning. If the SD card is too slow sending the response, the
+ * timer will expire and a "Buffer Read Ready" interrupt without data
+ * is triggered. This leads to tuning errors.
+ *
+ * Just set the timeout to the maximum value because the core will
+ * already take care of it in sdhci_send_tuning().
+ */
+ sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
+
+ hs400_tuning = host->flags & SDHCI_HS400_TUNING;
+
+ do {
+ if (esdhc->quirk_limited_clk_division &&
+ hs400_tuning)
+ esdhc_of_set_clock(host, host->clock);
+
+ /* Do HW tuning */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_TB_MODE_MASK;
+ val |= ESDHC_TB_MODE_3;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ ret = sdhci_execute_tuning(mmc, opcode);
+ if (ret)
+ break;
+
+ /* For type2 affected platforms of the tuning erratum,
+ * tuning may succeed although eSDHC might not have
+ * tuned properly. Need to check tuning window.
+ */
+ if (esdhc->quirk_tuning_erratum_type2 &&
+ !host->tuning_err) {
+ esdhc_tuning_window_ptr(host, &window_start,
+ &window_end);
+ if (abs(window_start - window_end) >
+ (4 * esdhc->div_ratio + 2))
+ host->tuning_err = -EAGAIN;
+ }
+
+ /* If HW tuning fails and triggers erratum,
+ * try workaround.
+ */
+ ret = host->tuning_err;
+ if (ret == -EAGAIN &&
+ (esdhc->quirk_tuning_erratum_type1 ||
+ esdhc->quirk_tuning_erratum_type2)) {
+ /* Recover HS400 tuning flag */
+ if (hs400_tuning)
+ host->flags |= SDHCI_HS400_TUNING;
+ pr_info("%s: Hold on to use fixed sampling clock. Try SW tuning!\n",
+ mmc_hostname(mmc));
+ /* Do SW tuning */
+ esdhc_prepare_sw_tuning(host, &window_start,
+ &window_end);
+ ret = esdhc_execute_sw_tuning(mmc, opcode,
+ window_start,
+ window_end);
+ if (ret)
+ break;
+
+ /* Retry both HW/SW tuning with reduced clock. */
+ ret = host->tuning_err;
+ if (ret == -EAGAIN && retries) {
+ /* Recover HS400 tuning flag */
+ if (hs400_tuning)
+ host->flags |= SDHCI_HS400_TUNING;
+
+ clk = host->max_clk / (esdhc->div_ratio + 1);
+ esdhc_of_set_clock(host, clk);
+ pr_info("%s: Hold on to use fixed sampling clock. Try tuning with reduced clock!\n",
+ mmc_hostname(mmc));
+ } else {
+ break;
+ }
+ } else {
+ break;
+ }
+ } while (retries--);
+
+ if (ret) {
+ esdhc_tuning_block_enable(host, false);
+ } else if (hs400_tuning) {
+ val = sdhci_readl(host, ESDHC_SDTIMNGCTL);
+ val |= ESDHC_FLW_CTL_BG;
+ sdhci_writel(host, val, ESDHC_SDTIMNGCTL);
+ }
+
+ return ret;
+}
+
+static void esdhc_set_uhs_signaling(struct sdhci_host *host,
+ unsigned int timing)
+{
+ u32 val;
+
+ /*
+ * There are specific registers setting for HS400 mode.
+ * Clean all of them if controller is in HS400 mode to
+ * exit HS400 mode before re-setting any speed mode.
+ */
val = sdhci_readl(host, ESDHC_TBCTL);
- val |= ESDHC_TB_EN;
- sdhci_writel(host, val, ESDHC_TBCTL);
- esdhc_clock_enable(host, true);
+ if (val & ESDHC_HS400_MODE) {
+ val = sdhci_readl(host, ESDHC_SDTIMNGCTL);
+ val &= ~ESDHC_FLW_CTL_BG;
+ sdhci_writel(host, val, ESDHC_SDTIMNGCTL);
- return sdhci_execute_tuning(mmc, opcode);
+ val = sdhci_readl(host, ESDHC_SDCLKCTL);
+ val &= ~ESDHC_CMD_CLK_CTL;
+ sdhci_writel(host, val, ESDHC_SDCLKCTL);
+
+ esdhc_clock_enable(host, false);
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_HS400_MODE;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+ esdhc_clock_enable(host, true);
+
+ val = sdhci_readl(host, ESDHC_DLLCFG0);
+ val &= ~(ESDHC_DLL_ENABLE | ESDHC_DLL_FREQ_SEL);
+ sdhci_writel(host, val, ESDHC_DLLCFG0);
+
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_HS400_WNDW_ADJUST;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ esdhc_tuning_block_enable(host, false);
+ }
+
+ if (timing == MMC_TIMING_MMC_HS400)
+ esdhc_tuning_block_enable(host, true);
+ else
+ sdhci_set_uhs_signaling(host, timing);
+}
+
+static u32 esdhc_irq(struct sdhci_host *host, u32 intmask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 command;
+
+ if (esdhc->quirk_trans_complete_erratum) {
+ command = SDHCI_GET_CMD(sdhci_readw(host,
+ SDHCI_COMMAND));
+ if (command == MMC_WRITE_MULTIPLE_BLOCK &&
+ sdhci_readw(host, SDHCI_BLOCK_COUNT) &&
+ intmask & SDHCI_INT_DATA_END) {
+ intmask &= ~SDHCI_INT_DATA_END;
+ sdhci_writel(host, SDHCI_INT_DATA_END,
+ SDHCI_INT_STATUS);
+ }
+ }
+ return intmask;
}
#ifdef CONFIG_PM_SLEEP
@@ -794,7 +1275,8 @@
.adma_workaround = esdhc_of_adma_workaround,
.set_bus_width = esdhc_pltfm_set_bus_width,
.reset = esdhc_reset,
- .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_uhs_signaling = esdhc_set_uhs_signaling,
+ .irq = esdhc_irq,
};
static const struct sdhci_ops sdhci_esdhc_le_ops = {
@@ -811,7 +1293,8 @@
.adma_workaround = esdhc_of_adma_workaround,
.set_bus_width = esdhc_pltfm_set_bus_width,
.reset = esdhc_reset,
- .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_uhs_signaling = esdhc_set_uhs_signaling,
+ .irq = esdhc_irq,
};
static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
@@ -837,6 +1320,20 @@
{ },
};
+static struct soc_device_attribute soc_fixup_sdhc_clkdivs[] = {
+ { .family = "QorIQ LX2160A", .revision = "1.0", },
+ { .family = "QorIQ LX2160A", .revision = "2.0", },
+ { .family = "QorIQ LS1028A", .revision = "1.0", },
+ { },
+};
+
+static struct soc_device_attribute soc_unreliable_pulse_detection[] = {
+ { .family = "QorIQ LX2160A", .revision = "1.0", },
+ { .family = "QorIQ LX2160A", .revision = "2.0", },
+ { .family = "QorIQ LS1028A", .revision = "1.0", },
+ { },
+};
+
static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
{
const struct of_device_id *match;
@@ -859,20 +1356,38 @@
else
esdhc->quirk_incorrect_hostver = false;
+ if (soc_device_match(soc_fixup_sdhc_clkdivs))
+ esdhc->quirk_limited_clk_division = true;
+ else
+ esdhc->quirk_limited_clk_division = false;
+
+ if (soc_device_match(soc_unreliable_pulse_detection))
+ esdhc->quirk_unreliable_pulse_detection = true;
+ else
+ esdhc->quirk_unreliable_pulse_detection = false;
+
match = of_match_node(sdhci_esdhc_of_match, pdev->dev.of_node);
if (match)
esdhc->clk_fixup = match->data;
np = pdev->dev.of_node;
+
+ if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
+ esdhc->quirk_delay_before_data_reset = true;
+ esdhc->quirk_trans_complete_erratum = true;
+ }
+
clk = of_clk_get(np, 0);
if (!IS_ERR(clk)) {
/*
* esdhc->peripheral_clock would be assigned with a value
* which is eSDHC base clock when use periperal clock.
- * For ls1046a, the clock value got by common clk API is
- * peripheral clock while the eSDHC base clock is 1/2
- * peripheral clock.
+ * For some platforms, the clock value got by common clk
+ * API is peripheral clock while the eSDHC base clock is
+ * 1/2 peripheral clock.
*/
- if (of_device_is_compatible(np, "fsl,ls1046a-esdhc"))
+ if (of_device_is_compatible(np, "fsl,ls1046a-esdhc") ||
+ of_device_is_compatible(np, "fsl,ls1028a-esdhc") ||
+ of_device_is_compatible(np, "fsl,ls1088a-esdhc"))
esdhc->peripheral_clock = clk_get_rate(clk) / 2;
else
esdhc->peripheral_clock = clk_get_rate(clk);
@@ -880,13 +1395,25 @@
clk_put(clk);
}
- if (esdhc->peripheral_clock) {
- esdhc_clock_enable(host, false);
- val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ esdhc_clock_enable(host, false);
+ val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ /*
+ * This bit is not able to be reset by SDHCI_RESET_ALL. Need to
+ * initialize it as 1 or 0 once, to override the different value
+ * which may be configured in bootloader.
+ */
+ if (esdhc->peripheral_clock)
val |= ESDHC_PERIPHERAL_CLK_SEL;
- sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
- esdhc_clock_enable(host, true);
- }
+ else
+ val &= ~ESDHC_PERIPHERAL_CLK_SEL;
+ sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
+ esdhc_clock_enable(host, true);
+}
+
+static int esdhc_hs400_prepare_ddr(struct mmc_host *mmc)
+{
+ esdhc_tuning_block_enable(mmc_priv(mmc), false);
+ return 0;
}
static int sdhci_esdhc_probe(struct platform_device *pdev)
@@ -912,6 +1439,7 @@
host->mmc_host_ops.start_signal_voltage_switch =
esdhc_signal_voltage_switch;
host->mmc_host_ops.execute_tuning = esdhc_execute_tuning;
+ host->mmc_host_ops.hs400_prepare_ddr = esdhc_hs400_prepare_ddr;
host->tuning_delay = 1;
esdhc_init(pdev, host);
@@ -920,6 +1448,16 @@
pltfm_host = sdhci_priv(host);
esdhc = sdhci_pltfm_priv(pltfm_host);
+ if (soc_device_match(soc_tuning_erratum_type1))
+ esdhc->quirk_tuning_erratum_type1 = true;
+ else
+ esdhc->quirk_tuning_erratum_type1 = false;
+
+ if (soc_device_match(soc_tuning_erratum_type2))
+ esdhc->quirk_tuning_erratum_type2 = true;
+ else
+ esdhc->quirk_tuning_erratum_type2 = false;
+
if (esdhc->vendor_ver == VENDOR_V_22)
host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;
@@ -941,12 +1479,14 @@
if (of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+ esdhc->quirk_ignore_data_inhibit = false;
if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
/*
* Freescale messed up with P2020 as it has a non-standard
* host control register
*/
host->quirks2 |= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
+ esdhc->quirk_ignore_data_inhibit = true;
}
/* call to generic mmc_of_parse to support additional capabilities */
@@ -969,6 +1509,7 @@
static struct platform_driver sdhci_esdhc_driver = {
.driver = {
.name = "sdhci-esdhc",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = sdhci_esdhc_of_match,
.pm = &esdhc_of_dev_pm_ops,
},
--
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