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Subject[PATCH 2/2] mmc: sdhci: sdhci-pci-core: Add Genesis Logic GL975x support
Date
Add support for the GL9750 and GL9755 chipsets.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Co-developed-by: Michael K Johnson <johnsonm@danlj.org>
Signed-off-by: Michael K Johnson <johnsonm@danlj.org>
---
drivers/mmc/host/sdhci-gli.h | 27 ++++
drivers/mmc/host/sdhci-pci-core.c | 220 ++++++++++++++++++++++++++++++
drivers/mmc/host/sdhci-pci.h | 3 +
drivers/mmc/host/sdhci.c | 142 +++++++++++++++++--
drivers/mmc/host/sdhci.h | 2 +
include/linux/pci_ids.h | 1 +
6 files changed, 385 insertions(+), 10 deletions(-)
create mode 100644 drivers/mmc/host/sdhci-gli.h

diff --git a/drivers/mmc/host/sdhci-gli.h b/drivers/mmc/host/sdhci-gli.h
new file mode 100644
index 000000000000..0acd35b6d3e2
--- /dev/null
+++ b/drivers/mmc/host/sdhci-gli.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __SDHCI_GLI_H
+#define __SDHCI_GLI_H
+
+/* the define PCI_VENDOR_ID_GLI may put in kernel/include/linux/pci_ids.h */
+#ifndef PCI_VENDOR_ID_GLI
+#define PCI_VENDOR_ID_GLI 0x17a0
+#endif
+
+/* Genesys Logic extra registers */
+#define SDHCI_GLI_9750_WT 0x800
+#define SDHCI_GLI_9750_DRIVING 0x860
+#define SDHCI_GLI_9750_PLL 0x864
+#define SDHCI_GLI_9750_SW_CTRL 0x874
+#define SDHCI_GLI_9750_MISC 0x878
+
+#define SDHCI_GLI_9750_TUNING_CONTROL 0x540
+#define SDHCI_GLI_9750_TUNING_PARAMETERS 0x544
+
+#define GLI_9755_DRIVER_VER "Genesys Logic (GL9755 v0.9.0-y190703)"
+#define GLI_9750_DRIVER_VER "Genesys Logic (GL9750 v0.9.0-y190703)"
+
+#define GLI_MAX_TUNING_LOOP 40
+
+void gli_set_9750(struct sdhci_host *host);
+
+#endif /* __SDHCI_GLI_H */
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 4154ee11b47d..b5c28df39de1 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -35,6 +35,7 @@

#include "sdhci.h"
#include "sdhci-pci.h"
+#include "sdhci-gli.h"

static void sdhci_pci_hw_reset(struct sdhci_host *host);

@@ -1453,6 +1454,223 @@ static const struct sdhci_pci_fixes sdhci_rtsx = {
.probe_slot = rtsx_probe_slot,
};

+/* Genesys Logic chipset */
+static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot)
+{
+ struct sdhci_host *host = slot->host;
+
+ slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
+ dev_info(&slot->chip->pdev->dev, "%s\n", GLI_9755_DRIVER_VER);
+ sdhci_enable_v4_mode(host);
+
+ return 0;
+}
+
+static void gli_set_9750_rx_inv(struct sdhci_host *host, bool b)
+{
+ u32 wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
+ u32 misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
+
+ if ((wt_value & 0x1) == 0) {
+ wt_value |= 0x1;
+ sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
+ }
+
+ misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
+ if (b) {
+ misc_value |= 0x8;
+ sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
+ } else {
+ misc_value &= ~0x8;
+ sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
+ }
+
+ wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
+ wt_value &= ~0x1;
+ sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
+}
+
+static int __sdhci_execute_tuning_9750(struct sdhci_host *host, u32 opcode)
+{
+ int i;
+ int rx_inv = 0;
+
+ for (rx_inv = 0; rx_inv < 2; rx_inv++) {
+ if (rx_inv & 0x1)
+ gli_set_9750_rx_inv(host, true);
+ else
+ gli_set_9750_rx_inv(host, false);
+
+ sdhci_start_tuning(host);
+
+ for (i = 0; i < GLI_MAX_TUNING_LOOP; i++) {
+ u16 ctrl;
+
+ sdhci_send_tuning(host, opcode);
+
+ if (!host->tuning_done) {
+ if (rx_inv == 1) {
+ pr_info("%s: Tuning timeout, falling back to fixed sampling clock\n",
+ mmc_hostname(host->mmc));
+ sdhci_abort_tuning(host, opcode);
+ return -ETIMEDOUT;
+ }
+ pr_info("%s: Tuning timeout, try next tuning\n",
+ mmc_hostname(host->mmc));
+ sdhci_abort_tuning(host, opcode);
+ break;
+ }
+
+ ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
+ if (ctrl & SDHCI_CTRL_TUNED_CLK) {
+ pr_info("%s: Tuning successful\n",
+ mmc_hostname(host->mmc));
+ return 0; /* Success! */
+ }
+ break;
+ }
+ }
+ }
+
+ pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
+ mmc_hostname(host->mmc));
+ sdhci_reset_tuning(host);
+ return -EAGAIN;
+}
+
+static int gl9750_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ int err = 0;
+ unsigned int tuning_count = 0;
+ bool hs400_tuning;
+
+ hs400_tuning = host->flags & SDHCI_HS400_TUNING;
+
+ if (host->tuning_mode == SDHCI_TUNING_MODE_1)
+ tuning_count = host->tuning_count;
+
+ /*
+ * The Host Controller needs tuning in case of SDR104 and DDR50
+ * mode, and for SDR50 mode when Use Tuning for SDR50 is set in
+ * the Capabilities register.
+ * If the Host Controller supports the HS200 mode then the
+ * tuning function has to be executed.
+ */
+ switch (host->timing) {
+ /* HS400 tuning is done in HS200 mode */
+ case MMC_TIMING_MMC_HS400:
+ err = -EINVAL;
+ goto out;
+
+ case MMC_TIMING_MMC_HS200:
+ /*
+ * Periodic re-tuning for HS400 is not expected to be needed, so
+ * disable it here.
+ */
+ if (hs400_tuning)
+ tuning_count = 0;
+ break;
+
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_UHS_DDR50:
+ break;
+
+ case MMC_TIMING_UHS_SDR50:
+ if (host->flags & SDHCI_SDR50_NEEDS_TUNING)
+ break;
+ /* FALLTHROUGH */
+
+ default:
+ goto out;
+ }
+
+ if (host->ops->platform_execute_tuning) {
+ err = host->ops->platform_execute_tuning(host, opcode);
+ goto out;
+ }
+
+ host->mmc->retune_period = tuning_count;
+
+ if (host->tuning_delay < 0)
+ host->tuning_delay = opcode == MMC_SEND_TUNING_BLOCK;
+
+ gli_set_9750(host);
+ host->tuning_err = __sdhci_execute_tuning_9750(host, opcode);
+
+ sdhci_end_tuning(host);
+out:
+ host->flags &= ~SDHCI_HS400_TUNING;
+
+ return err;
+}
+
+static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot)
+{
+ struct sdhci_host *host = slot->host;
+ struct mmc_host_ops *ops = &host->mmc_host_ops;
+
+ u32 gli_wt = sdhci_readl(host, SDHCI_GLI_9750_WT);
+
+ dev_info(&slot->chip->pdev->dev, "%s\n", GLI_9750_DRIVER_VER);
+ slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
+
+ if ((gli_wt & 0x1) == 0) {
+ gli_wt |= 0x1;
+ sdhci_writel(host, gli_wt, SDHCI_GLI_9750_WT);
+ }
+
+ gli_wt = sdhci_readl(host, SDHCI_GLI_9750_WT);
+ gli_wt &= ~0x1;
+ sdhci_writel(host, gli_wt, SDHCI_GLI_9750_WT);
+
+ sdhci_enable_v4_mode(host);
+
+ ops->execute_tuning = gl9750_execute_tuning;
+
+ return 0;
+}
+
+static void sdhci_gli_voltage_switch(struct sdhci_host *host)
+{
+ usleep_range(5000, 5500);
+}
+
+static const struct sdhci_ops sdhci_gl9755_ops = {
+ .set_clock = sdhci_set_clock,
+ .enable_dma = sdhci_pci_enable_dma,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .hw_reset = sdhci_pci_hw_reset,
+ .voltage_switch = sdhci_gli_voltage_switch,
+};
+
+static const struct sdhci_pci_fixes sdhci_gl9755 = {
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .quirks2 = SDHCI_QUIRK2_BROKEN_DDR50,
+ .probe_slot = gli_probe_slot_gl9755,
+ .ops = &sdhci_gl9755_ops,
+};
+
+static const struct sdhci_ops sdhci_gl9750_ops = {
+ .set_clock = sdhci_set_clock,
+ .enable_dma = sdhci_pci_enable_dma,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .hw_reset = sdhci_pci_hw_reset,
+ .voltage_switch = sdhci_gli_voltage_switch,
+};
+
+static const struct sdhci_pci_fixes sdhci_gl9750 = {
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .quirks2 = SDHCI_QUIRK2_BROKEN_DDR50,
+ .probe_slot = gli_probe_slot_gl9750,
+ .ops = &sdhci_gl9750_ops,
+};
+
/*AMD chipset generation*/
enum amd_chipset_gen {
AMD_CHIPSET_BEFORE_ML,
@@ -1682,6 +1900,8 @@ static const struct pci_device_id pci_ids[] = {
SDHCI_PCI_DEVICE(O2, SEABIRD1, o2),
SDHCI_PCI_DEVICE(ARASAN, PHY_EMMC, arasan),
SDHCI_PCI_DEVICE(SYNOPSYS, DWC_MSHC, snps),
+ SDHCI_PCI_DEVICE(GLI, 9755, gl9755),
+ SDHCI_PCI_DEVICE(GLI, 9750, gl9750),
SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd),
/* Generic SD host controller */
{PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)},
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index e5dc6e44c7a4..78e6b631e252 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -65,6 +65,9 @@

#define PCI_DEVICE_ID_SYNOPSYS_DWC_MSHC 0xc202

+#define PCI_DEVICE_ID_GLI_9755 0x9755
+#define PCI_DEVICE_ID_GLI_9750 0x9750
+
/*
* PCI device class and mask
*/
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index fd684d7a5f15..43740db9b9a6 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -25,6 +25,8 @@

#include <linux/leds.h>

+#include <linux/pci.h>
+
#include <linux/mmc/mmc.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -32,6 +34,8 @@
#include <linux/mmc/slot-gpio.h>

#include "sdhci.h"
+#include "sdhci-pci.h"
+#include "sdhci-gli.h"

#define DRIVER_NAME "sdhci"

@@ -50,6 +54,8 @@ static void sdhci_finish_data(struct sdhci_host *);

static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);

+static bool gli_is_9750(struct sdhci_host *);
+
void sdhci_dumpregs(struct sdhci_host *host)
{
SDHCI_DUMP("============ SDHCI REGISTER DUMP ===========\n");
@@ -328,6 +334,8 @@ static void sdhci_init(struct sdhci_host *host, int soft)

host->cqe_on = false;

+ gli_set_9750(host);
+
if (soft) {
/* force clock reconfiguration */
host->clock = 0;
@@ -1638,15 +1646,20 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk)

/* Wait max 150 ms */
timeout = ktime_add_ms(ktime_get(), 150);
- while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
- & SDHCI_CLOCK_INT_STABLE)) {
- if (ktime_after(ktime_get(), timeout)) {
- pr_err("%s: Internal clock never stabilised.\n",
+ while (1) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ if (clk & SDHCI_CLOCK_INT_STABLE)
+ break;
+ if (timedout) {
+ pr_err("%s: Internal clock never stablitised.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
return;
}
udelay(10);
+
}

clk |= SDHCI_CLOCK_PLL_EN;
@@ -1655,9 +1668,13 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk)

/* Wait max 150 ms */
timeout = ktime_add_ms(ktime_get(), 150);
- while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
- & SDHCI_CLOCK_INT_STABLE)) {
- if (ktime_after(ktime_get(), timeout)) {
+ while (1) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ if (clk & SDHCI_CLOCK_INT_STABLE)
+ break;
+ if (timedout) {
pr_err("%s: PLL clock never stabilised.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
@@ -2320,7 +2337,7 @@ void sdhci_reset_tuning(struct sdhci_host *host)
}
EXPORT_SYMBOL_GPL(sdhci_reset_tuning);

-static void sdhci_abort_tuning(struct sdhci_host *host, u32 opcode)
+void sdhci_abort_tuning(struct sdhci_host *host, u32 opcode)
{
sdhci_reset_tuning(host);

@@ -2331,6 +2348,7 @@ static void sdhci_abort_tuning(struct sdhci_host *host, u32 opcode)

mmc_abort_tuning(host->mmc, opcode);
}
+EXPORT_SYMBOL_GPL(sdhci_abort_tuning);

/*
* We use sdhci_send_tuning() because mmc_send_tuning() is not a good fit. SDHCI
@@ -2487,9 +2505,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
host->tuning_delay = opcode == MMC_SEND_TUNING_BLOCK;

sdhci_start_tuning(host);
-
host->tuning_err = __sdhci_execute_tuning(host, opcode);
-
sdhci_end_tuning(host);
out:
host->flags &= ~SDHCI_HS400_TUNING;
@@ -4084,6 +4100,12 @@ int sdhci_setup_host(struct sdhci_host *host)
* value.
*/
max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
+
+ if (gli_is_9750(host)) {
+ if (!(max_current_caps & 0xff))
+ max_current_caps |= 0xc8;
+ }
+
if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) {
int curr = regulator_get_current_limit(mmc->supply.vmmc);
if (curr > 0) {
@@ -4263,6 +4285,106 @@ void sdhci_cleanup_host(struct sdhci_host *host)
}
EXPORT_SYMBOL_GPL(sdhci_cleanup_host);

+// for Genesys Logic
+void gli_set_9750(struct sdhci_host *host)
+{
+ u32 wt_value = 0;
+ u32 driving_value = 0;
+ u32 pll_value = 0;
+ u32 sw_ctrl_value = 0;
+ u32 misc_value = 0;
+ u32 parameter_value = 0;
+ u32 control_value = 0;
+
+ u16 ctrl2 = 0;
+
+ if (!gli_is_9750(host))
+ return;
+
+ wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
+ if ((wt_value & 0x1) == 0) {
+ wt_value |= 0x1;
+ sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
+ }
+
+ driving_value = sdhci_readl(host, SDHCI_GLI_9750_DRIVING);
+ pll_value = sdhci_readl(host, SDHCI_GLI_9750_PLL);
+ sw_ctrl_value = sdhci_readl(host, SDHCI_GLI_9750_SW_CTRL);
+ misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
+ parameter_value = sdhci_readl(host, SDHCI_GLI_9750_TUNING_PARAMETERS);
+ control_value = sdhci_readl(host, SDHCI_GLI_9750_TUNING_CONTROL);
+
+ driving_value &= ~(0x0C000FFF);
+ driving_value |= 0x0C000FFF;
+ sdhci_writel(host, driving_value, SDHCI_GLI_9750_DRIVING);
+
+ sw_ctrl_value |= 0xc0;
+ sdhci_writel(host, sw_ctrl_value, SDHCI_GLI_9750_SW_CTRL);
+
+ // reset the tuning flow after reinit and before starting tuning
+ pll_value |= 0x800000; // bit23-1
+ pll_value &= ~(0x00700000); // bit22:20-0
+
+ misc_value &= ~(0x8); // bit3-0
+ misc_value &= ~(0x4); // bit2-0
+
+ misc_value &= ~(0x70); // bit6:4-0
+ misc_value |= 0x50; // bit6:4-5
+
+ parameter_value &= ~(0x7); // bit2:0-0
+ parameter_value |= 0x1; // bit2:0-1
+
+ control_value &= ~(0x190000); // bit20:19-0, bit16-0
+ control_value |= 0x110000; // bit20:19-b10, bit16-1
+
+ sdhci_writel(host, pll_value, SDHCI_GLI_9750_PLL);
+ sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
+
+ // disable tuned clk
+ ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ ctrl2 &= ~SDHCI_CTRL_TUNED_CLK;
+ sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
+
+ // 540 enable tuning parameters control
+ control_value |= 0x10;
+ sdhci_writel(host, control_value, SDHCI_GLI_9750_TUNING_CONTROL);
+
+ // write 544 tuning parameters
+ sdhci_writel(host, parameter_value, SDHCI_GLI_9750_TUNING_PARAMETERS);
+
+ // 540 disable tuning parameters control
+ control_value &= ~0x10;
+ sdhci_writel(host, control_value, SDHCI_GLI_9750_TUNING_CONTROL);
+
+ // clear tuned clk
+ ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ ctrl2 &= ~SDHCI_CTRL_TUNED_CLK;
+ sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
+
+ udelay(1);
+ wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
+ wt_value &= ~0x1;
+ sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
+}
+EXPORT_SYMBOL_GPL(gli_set_9750);
+
+bool gli_is_9750(struct sdhci_host *host)
+{
+ struct sdhci_pci_slot *slot = sdhci_priv(host);
+ struct sdhci_pci_chip *chip;
+ struct pci_dev *pdev;
+
+ chip = slot->chip;
+ pdev = chip->pdev;
+
+ if (pdev->vendor == PCI_VENDOR_ID_GLI &&
+ pdev->device == PCI_DEVICE_ID_GLI_9750) {
+ return true;
+ }
+
+ return false;
+}
+
int __sdhci_add_host(struct sdhci_host *host)
{
unsigned int flags = WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_HIGHPRI;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 199712e7adbb..437bab3af195 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -114,6 +114,7 @@
#define SDHCI_DIV_HI_MASK 0x300
#define SDHCI_PROG_CLOCK_MODE 0x0020
#define SDHCI_CLOCK_CARD_EN 0x0004
+#define SDHCI_CLOCK_PLL_EN 0x0008
#define SDHCI_CLOCK_INT_STABLE 0x0002
#define SDHCI_CLOCK_INT_EN 0x0001

@@ -796,5 +797,6 @@ void sdhci_start_tuning(struct sdhci_host *host);
void sdhci_end_tuning(struct sdhci_host *host);
void sdhci_reset_tuning(struct sdhci_host *host);
void sdhci_send_tuning(struct sdhci_host *host, u32 opcode);
+void sdhci_abort_tuning(struct sdhci_host *host, u32 opcode);

#endif /* __SDHCI_HW_H */
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 70e86148cb1e..e668da5c8df5 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2403,6 +2403,7 @@
#define PCI_DEVICE_ID_RDC_R6061 0x6061
#define PCI_DEVICE_ID_RDC_D1010 0x1010

+#define PCI_VENDOR_ID_GLI 0x17a0
#define PCI_VENDOR_ID_LENOVO 0x17aa

#define PCI_VENDOR_ID_QCOM 0x17cb
--
2.22.0
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