RE: [4.9, 1/1] mmc: sdhci-dwc-mshc-pci: synopsys dwc mshc support
From: Prabu Thangamuthu
Date: Tue Apr 10 2018 - 07:29:17 EST
Hi Adrian,
This patch is intended to submit against linux-4.9.y branch.
Looks like my email client has some problems.
I will fix it and send again.
Thanks,
Prabu
On 20/01/2018 16:44 Adrian Hunter wrote:
> Hi
>
> Not sure what is going on this this patch. Apart from the mangled mail, it is
> not clear it is intended for upstream?
>
> Regards
> Adrian
>
> On 28/03/18 18:28, Prabu Thangamuthu wrote:
> > Synopsys DWC MSHC IP is complaint to SD Standard Host Controller
> > Interface
> >
> > specification. This patch is to enable DWC MSHC controller on HPAS-DX
> >
> > platform connected using PCIe interface.
> >
> >
> >
> > As clock generation logic is implemented in MMCM block of HAPS-DX
> > platform,
> >
> > we need separate functions to control the MMCM module to generate
> > required
> >
> > clocks with respect to the mode of operation. Also we have the
> > platform
> >
> > specific set_power function to support different VDD's of eMMC device.
> >
> >
> >
> > Signed-off-by: Prabu Thangamuthu <prabu.t@xxxxxxxxxxxx>
> >
> > ---
> >
> > MAINTAINERS | 7 ++
> >
> > drivers/mmc/host/Makefile | 3 +-
> >
> > drivers/mmc/host/sdhci-dwc-mshc-pci.c | 137
> > ++++++++++++++++++++++++++++++++++
> >
> > drivers/mmc/host/sdhci-dwc-mshc-pci.h | 44 +++++++++++
> >
> > drivers/mmc/host/sdhci-pci-core.c | 25 +++++++
> >
> > 5 files changed, 215 insertions(+), 1 deletion(-)
> >
> > create mode 100644 drivers/mmc/host/sdhci-dwc-mshc-pci.c
> >
> > create mode 100644 drivers/mmc/host/sdhci-dwc-mshc-pci.h
> >
> >
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> >
> > index 63cefa6..869b92b 100644
> >
> > --- a/MAINTAINERS
> >
> > +++ b/MAINTAINERS
> >
> > @@ -10808,6 +10808,13 @@ S: Maintained
> >
> > F: drivers/mmc/host/sdhci*
> >
> > F: include/linux/mmc/sdhci*
> >
> > +SYNOPSYS SDHCI COMPLIANT DWC MSHC DRIVER
> >
> > +M: Prabu Thangamuthu <prabu.t@xxxxxxxxxxxx>
> >
> > +M: Manjunath M B <manjumb@xxxxxxxxxxxx>
> >
> > +L: linux-mmc@xxxxxxxxxxxxxxx
> >
> > +S: Maintained
> >
> > +F: drivers/mmc/host/sdhci-dwc*
> >
> > +
> >
> > SECURE COMPUTING
> >
> > M: Kees Cook <keescook@xxxxxxxxxxxx>
> >
> > R: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
> >
> > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> >
> > index e2bdaaf4..e83355f 100644
> >
> > --- a/drivers/mmc/host/Makefile
> >
> > +++ b/drivers/mmc/host/Makefile
> >
> > @@ -9,7 +9,8 @@ obj-$(CONFIG_MMC_MXC) += mxcmmc.o
> >
> > obj-$(CONFIG_MMC_MXS) += mxs-mmc.o
> >
> > obj-$(CONFIG_MMC_SDHCI) += sdhci.o
> >
> > obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
> >
> > -sdhci-pci-y +=
> > sdhci-pci-core.o sdhci-pci-o2micro.o
> >
> > +sdhci-pci-y +=
> > +sdhci-pci-core.o
> > sdhci-pci-o2micro.o \
> >
> > +
> > sdhci-dwc-mshc-pci.o
> >
> > obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI)) += sdhci-pci-data.o
> >
> > obj-$(CONFIG_MMC_SDHCI_ACPI) += sdhci-acpi.o
> >
> > obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o
> >
> > diff --git a/drivers/mmc/host/sdhci-dwc-mshc-pci.c
> > b/drivers/mmc/host/sdhci-dwc-mshc-pci.c
> >
> > new file mode 100644
> >
> > index 0000000..2f91ef7
> >
> > --- /dev/null
> >
> > +++ b/drivers/mmc/host/sdhci-dwc-mshc-pci.c
> >
> > @@ -0,0 +1,137 @@
> >
> > +/*
> >
> > + * SDHCI driver for Synopsys DWC_MSHC controller
> >
> > + *
> >
> > + * Copyright (C) 2017-2018 Synopsys, Inc. (www.synopsys.com)
> >
> > + *
> >
> > + * Authors:
> >
> > + * Prabu Thangamuthu <prabut@xxxxxxxxxxxx>
> >
> > + * Manjunath M B <manjumb@xxxxxxxxxxxx>
> >
> > + *
> >
> > + * This program is free software; you can redistribute it and/or
> > + modify
> >
> > + * it under the terms of the GNU General Public License version 2 as
> >
> > + * published by the Free Software Foundation.
> >
> > + */
> >
> > +
> >
> > +#include <linux/pci.h>
> >
> > +#include <linux/delay.h>
> >
> > +#include <linux/module.h>
> >
> > +#include <linux/moduleparam.h>
> >
> > +
> >
> > +#include "sdhci.h"
> >
> > +#include "sdhci-pci.h"
> >
> > +#include "sdhci-dwc-mshc-pci.h"
> >
> > +
> >
> > +#define DRIVER_NAME "sdhci_snps"
> >
> > +
> >
> > +/* Default emmc vdd is set to 1.8V */
> >
> > +static unsigned int emmc_vdd = SDHC_EMMC_VDD_180V;
> >
> > +module_param(emmc_vdd, int, 0444);
> >
> > +
> >
> > +void sdhci_snps_set_clock(struct sdhci_host *host, unsigned int
> > +clock)
> >
> > +{
> >
> > + u16 clk = 0;
> >
> > + u32 reg = 0;
> >
> > + u32 vendor_ptr = 0;
> >
> > +
> >
> > + vendor_ptr = sdhci_readw(host, SDHCI_VENDOR_PTR_R);
> >
> > +
> >
> > + /* Disable Software managed rx tuning */
> >
> > + reg = sdhci_readl(host, (SDHC_AT_CTRL_R + vendor_ptr));
> >
> > + reg &= ~SDHC_SW_TUNE_EN;
> >
> > + sdhci_writel(host, reg, (SDHC_AT_CTRL_R + vendor_ptr));
> >
> > +
> >
> > + if (clock <= 52000000) {
> >
> > + sdhci_set_clock(host, clock);
> >
> > + } else {
> >
> > + /* Assert reset to MMCM */
> >
> > + reg = sdhci_readl(host, (SDHC_GPIO_OUT +
> > vendor_ptr));
> >
> > + reg |= SDHC_CCLK_MMCM_RST;
> >
> > + sdhci_writel(host, reg, (SDHC_GPIO_OUT +
> > vendor_ptr));
> >
> > +
> >
> > + /* Configure MMCM*/
> >
> > + sdhci_writel(host, DIV_REG_100_MHZ,
> > SDHC_MMCM_DIV_REG);
> >
> > + sdhci_writel(host, CLKFBOUT_100_MHZ,
> >
> > +
> > SDHC_MMCM_CLKFBOUT);
> >
> > +
> >
> > + /* De-assert reset to MMCM*/
> >
> > + reg = sdhci_readl(host, (SDHC_GPIO_OUT +
> > vendor_ptr));
> >
> > + reg &= ~SDHC_CCLK_MMCM_RST;
> >
> > + sdhci_writel(host, reg, (SDHC_GPIO_OUT +
> > vendor_ptr));
> >
> > +
> >
> > + /* Enable clock */
> >
> > + clk = SDHCI_PROG_CLOCK_MODE |
> > +SDHCI_CLOCK_INT_EN |
> >
> > + SDHCI_CLOCK_CARD_EN;
> >
> > + sdhci_writew(host, clk,
> > +SDHCI_CLOCK_CONTROL);
> >
> > + }
> >
> > +}
> >
> > +EXPORT_SYMBOL_GPL(sdhci_snps_set_clock);
> >
> > +
> >
> > +void sdhci_snps_set_power(struct sdhci_host *host, unsigned char
> > +mode,
> >
> > + unsigned short vdd)
> >
> > +{
> >
> > + u8 pwr = 0;
> >
> > + u16 ctrl;
> >
> > +
> >
> > + if (mode != MMC_POWER_OFF) {
> >
> > + switch (1 << vdd) {
> >
> > + case MMC_VDD_165_195:
> >
> > + pwr = SDHCI_POWER_180;
> >
> > + break;
> >
> > + case MMC_VDD_29_30:
> >
> > + case MMC_VDD_30_31:
> >
> > + pwr = SDHCI_POWER_300;
> >
> > + break;
> >
> > + case MMC_VDD_32_33:
> >
> > + case MMC_VDD_33_34:
> >
> > + pwr = SDHCI_POWER_330;
> >
> > + break;
> >
> > + default:
> >
> > + WARN(1, "%s: Invalid vdd
> > +%#x\n",
> >
> > +
> > +mmc_hostname(host->mmc),
> > vdd);
> >
> > + break;
> >
> > + }
> >
> > + }
> >
> > +
> >
> > + if (host->pwr == pwr)
> >
> > + return;
> >
> > +
> >
> > + host->pwr = pwr;
> >
> > +
> >
> > + if (pwr == 0) {
> >
> > + sdhci_writeb(host, 0,
> > +SDHCI_POWER_CONTROL);
> >
> > + } else {
> >
> > + sdhci_writeb(host, 0,
> > +SDHCI_POWER_CONTROL);
> >
> > +
> >
> > + /*
> >
> > + * Enable it for eMMC phy cfg1 test with
> > +1.8V mode
> >
> > + */
> >
> > + if (emmc_vdd == SDHC_EMMC_VDD_180V) {
> >
> > + pwr = SDHCI_POWER_180;
> >
> > + sdhci_writeb(host, pwr,
> > SDHCI_POWER_CONTROL);
> >
> > +
> >
> > + ctrl = sdhci_readw(host,
> > SDHCI_HOST_CONTROL2);
> >
> > + /*
> >
> > + * Enable 1.8V Signal
> > +Enable in
> > the Host Control2
> >
> > + * register
> >
> > + */
> >
> > + ctrl |=
> > +SDHCI_CTRL_VDD_180;
> >
> > + sdhci_writew(host, ctrl,
> > SDHCI_HOST_CONTROL2);
> >
> > + }
> >
> > + pwr |= SDHCI_POWER_ON;
> >
> > +
> >
> > + sdhci_writeb(host, pwr,
> > +SDHCI_POWER_CONTROL);
> >
> > + }
> >
> > +}
> >
> > +EXPORT_SYMBOL_GPL(sdhci_snps_set_power);
> >
> > +
> >
> > +int sdhci_snps_pci_probe_slot(struct sdhci_pci_slot *slot)
> >
> > +{
> >
> > + slot->host->caps = sdhci_readl(host,
> > +SDHCI_CAPABILITIES);
> >
> > + slot->host->caps1 = sdhci_readl(host,
> > +SDHCI_CAPABILITIES_1);
> >
> > +
> >
> > + return 0;
> >
> > +}
> >
> > +EXPORT_SYMBOL_GPL(sdhci_snps_pci_probe_slot);
> >
> > +
> >
> > +MODULE_PARM_DESC(emmc_vdd, "VDD to configure eMMC device
> supply
> > +voltage");
> >
> > +
> >
> > diff --git a/drivers/mmc/host/sdhci-dwc-mshc-pci.h
> > b/drivers/mmc/host/sdhci-dwc-mshc-pci.h
> >
> > new file mode 100644
> >
> > index 0000000..97f5529
> >
> > --- /dev/null
> >
> > +++ b/drivers/mmc/host/sdhci-dwc-mshc-pci.h
> >
> > @@ -0,0 +1,44 @@
> >
> > +/*
> >
> > + * SDHCI driver for Synopsys DWC_MSHC controller
> >
> > + *
> >
> > + * Copyright (C) 2017-2018 Synopsys, Inc. (www.synopsys.com)
> >
> > + *
> >
> > + * Authors:
> >
> > + * Prabu Thangamuthu <prabut@xxxxxxxxxxxx>
> >
> > + * Manjunath M B <manjumb@xxxxxxxxxxxx>
> >
> > + *
> >
> > + * This program is free software; you can redistribute it and/or
> > + modify
> >
> > + * it under the terms of the GNU General Public License version 2 as
> >
> > + * published by the Free Software Foundation.
> >
> > + */
> >
> > +
> >
> > +#ifndef __SDHCI_DWC_MSHC_PCI_H__
> >
> > +#define __SDHCI_DWC_MSHC_PCI_H__
> >
> > +
> >
> > +#define SDHCI_VENDOR_PTR_R 0xE8
> >
> > +
> >
> > +/* Module Parameters */
> >
> > +#define SDHC_EMMC_VDD_330V 33
> >
> > +#define SDHC_EMMC_VDD_180V 18
> >
> > +
> >
> > +/* Synopsys Vendor Specific Registers */
> >
> > +#define SDHC_GPIO_OUT 0x34
> >
> > +#define SDHC_AT_CTRL_R
> > +0x40
> >
> > +
> >
> > +#define SDHC_SW_TUNE_EN
> > +0x00000010
> >
> > +
> >
> > +/* MMCM DRP */
> >
> > +#define SDHC_MMCM_DIV_REG 0x1020
> >
> > +#define DIV_REG_100_MHZ
> > +0x1145
> >
> > +
> >
> > +#define SDHC_MMCM_CLKFBOUT 0x1024
> >
> > +#define CLKFBOUT_100_MHZ 0x0000
> >
> > +
> >
> > +#define SDHC_CCLK_MMCM_RST 0x00000001
> >
> > +
> >
> > +int sdhci_snps_pci_probe_slot(struct sdhci_pci_slot *slot);
> >
> > +void sdhci_snps_set_clock(struct sdhci_host *host, unsigned int
> > +clock);
> >
> > +void sdhci_snps_set_power(struct sdhci_host *host, unsigned char
> > +mode,
> >
> > + unsigned short vdd);
> >
> > +
> >
> > +#endif
> >
> > diff --git a/drivers/mmc/host/sdhci-pci-core.c
> > b/drivers/mmc/host/sdhci-pci-core.c
> >
> > index b0b9ceb..f16ae5b 100644
> >
> > --- a/drivers/mmc/host/sdhci-pci-core.c
> >
> > +++ b/drivers/mmc/host/sdhci-pci-core.c
> >
> > @@ -31,6 +31,7 @@
> >
> > #include "sdhci.h"
> >
> > #include "sdhci-pci.h"
> >
> > #include "sdhci-pci-o2micro.h"
> >
> > +#include "sdhci-dwc-mshc-pci.h"
> >
> > static int sdhci_pci_enable_dma(struct sdhci_host *host);
> >
> > static void sdhci_pci_set_bus_width(struct sdhci_host *host, int
> > width);
> >
> > @@ -79,6 +80,23 @@ static int ricoh_mmc_resume(struct sdhci_pci_chip
> > *chip)
> >
> > return 0;
> >
> > }
> >
> > +/* Synopsys DWC MSHC Controller based on SDHCI-PCI */
> >
> > +static const struct sdhci_ops sdhci_snps_ops = {
> >
> > + .set_clock = sdhci_snps_set_clock,
> >
> > + .set_power = sdhci_snps_set_power,
> >
> > + .enable_dma = sdhci_pci_enable_dma,
> >
> > + .set_bus_width = sdhci_pci_set_bus_width,
> >
> > + .reset = sdhci_reset,
> >
> > + .set_uhs_signaling = sdhci_set_uhs_signaling,
> >
> > + .hw_reset =
> > +sdhci_pci_hw_reset,
> >
> > + .select_drive_strength =
> > +sdhci_pci_select_drive_strength,
> >
> > +};
> >
> > +
> >
> > +static const struct sdhci_pci_fixes sdhci_snps = {
> >
> > + .probe_slot = sdhci_snps_pci_probe_slot,
> >
> > + .ops = &sdhci_snps_ops,
> >
> > +};
> >
> > +
> >
> > static const struct sdhci_pci_fixes sdhci_ricoh = {
> >
> > .probe = ricoh_probe,
> >
> > .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
> >
> > @@ -857,6 +875,13 @@ static int amd_probe(struct sdhci_pci_chip *chip)
> >
> > static const struct pci_device_id pci_ids[] = {
> >
> > {
> >
> > + .vendor = 0x16c3,
> > /* Synopsys Vendor ID */
> >
> > + .device = 0xc202,
> > /* IPK HAPS_Dx */
> >
> > + .subvendor = PCI_ANY_ID,
> >
> > + .subdevice = PCI_ANY_ID,
> >
> > + .driver_data =
> > +(kernel_ulong_t)&sdhci_snps,
> >
> > + },
> >
> > + {
> >
> > .vendor =
> > PCI_VENDOR_ID_RICOH,
> >
> > .device =
> > PCI_DEVICE_ID_RICOH_R5C822,
> >
> > .subvendor = PCI_ANY_ID,
> >
> > --
> >
> > 1.9.1
> >
> >
> >